{"version":3,"file":"ol.js","sources":["../ol/AssertionError.js","../ol/events/Event.js","../ol/ObjectEventType.js","../ol/Disposable.js","../ol/array.js","../ol/functions.js","../ol/obj.js","../ol/events/Target.js","../ol/events/EventType.js","../ol/events.js","../ol/Observable.js","../ol/util.js","../ol/Object.js","../ol/CollectionEventType.js","../ol/Collection.js","../ol/TileState.js","../ol/easing.js","../ol/Tile.js","../ol/has.js","../ol/dom.js","../ol/DataTile.js","../ol/asserts.js","../ol/Feature.js","../ol/transform.js","../ol/extent/Relationship.js","../ol/extent.js","../ol/proj/Units.js","../ol/proj/Projection.js","../ol/proj/epsg3857.js","../ol/proj/epsg4326.js","../ol/proj/projections.js","../ol/proj/transforms.js","../ol/math.js","../ol/string.js","../ol/coordinate.js","../ol/sphere.js","../ol/console.js","../ol/proj.js","../ol/geom/flat/transform.js","../ol/geom/Geometry.js","../ol/geom/SimpleGeometry.js","../ol/geom/flat/closest.js","../ol/geom/flat/deflate.js","../ol/geom/flat/simplify.js","../ol/geom/flat/inflate.js","../ol/geom/flat/area.js","../ol/geom/LinearRing.js","../ol/geom/Point.js","../ol/geom/flat/contains.js","../ol/geom/flat/interiorpoint.js","../ol/geom/flat/segments.js","../ol/geom/flat/intersectsextent.js","../ol/geom/flat/reverse.js","../ol/geom/flat/orient.js","../ol/geom/Polygon.js","../ol/Geolocation.js","../ol/ImageBase.js","../ol/ImageState.js","../ol/Image.js","../ol/ImageCanvas.js","../ol/ImageTile.js","../ol/Kinetic.js","../ol/color.js","../ol/style/IconImageCache.js","../ol/layer/Property.js","../ol/layer/Base.js","../ol/render/EventType.js","../ol/ViewHint.js","../ol/ViewProperty.js","../ol/tilegrid/common.js","../ol/centerconstraint.js","../ol/resolutionconstraint.js","../ol/rotationconstraint.js","../ol/View.js","../ol/layer/Layer.js","../ol/renderer/Map.js","../ol/render/Event.js","../ol/css.js","../ol/render/canvas.js","../ol/renderer/Composite.js","../ol/layer/Group.js","../ol/MapEvent.js","../ol/MapBrowserEvent.js","../ol/MapBrowserEventType.js","../ol/pointer/EventType.js","../ol/MapBrowserEventHandler.js","../ol/MapEventType.js","../ol/MapProperty.js","../ol/structs/PriorityQueue.js","../ol/TileQueue.js","../ol/control/Control.js","../ol/control/Attribution.js","../ol/control/Rotate.js","../ol/control/Zoom.js","../ol/control/defaults.js","../ol/interaction/Property.js","../ol/interaction/Interaction.js","../ol/interaction/DoubleClickZoom.js","../ol/interaction/Pointer.js","../ol/events/condition.js","../ol/interaction/DragPan.js","../ol/interaction/DragRotate.js","../ol/render/Box.js","../ol/interaction/DragBox.js","../ol/interaction/DragZoom.js","../ol/events/Key.js","../ol/interaction/KeyboardPan.js","../ol/interaction/KeyboardZoom.js","../ol/interaction/MouseWheelZoom.js","../ol/interaction/PinchRotate.js","../ol/interaction/PinchZoom.js","../ol/interaction/defaults.js","../ol/size.js","../ol/Map.js","../ol/Overlay.js","../ol/structs/LRUCache.js","../ol/tilecoord.js","../ol/TileCache.js","../ol/TileRange.js","../ol/VectorRenderTile.js","../ol/VectorTile.js","../ol/colorlike.js","../ol/featureloader.js","../ol/net.js","../ol/loadingstrategy.js","../ol/render/VectorContext.js","../ol/render/canvas/Immediate.js","../ol/renderer/vector.js","../ol/render.js","../ol/reproj.js","../ol/reproj/common.js","../ol/reproj/Triangulation.js","../ol/reproj/Tile.js","../ol/source/TileEventType.js","../ol/source/Source.js","../ol/tilegrid/TileGrid.js","../ol/tilegrid.js","../ol/source/Tile.js","../ol/tileurlfunction.js","../ol/source/UrlTile.js","../ol/source/TileImage.js","../ol/source/BingMaps.js","../ol/source/XYZ.js","../ol/source/CartoDB.js","../../node_modules/quickselect/index.js","../../node_modules/rbush/index.js","../ol/structs/RBush.js","../ol/source/VectorEventType.js","../ol/source/Vector.js","../ol/source/Cluster.js","../ol/reproj/DataTile.js","../ol/source/DataTile.js","../ol/source/GeoTIFF.js","../ol/source/Zoomify.js","../ol/format/IIIFInfo.js","../ol/source/IIIF.js","../ol/reproj/Image.js","../ol/source/Image.js","../ol/uri.js","../ol/source/ImageArcGISRest.js","../ol/source/ImageCanvas.js","../ol/source/ImageMapGuide.js","../ol/source/ImageStatic.js","../ol/source/wms.js","../ol/source/ImageWMS.js","../ol/source/OSM.js","../ol/layer/BaseImage.js","../ol/renderer/Layer.js","../ol/renderer/canvas/Layer.js","../ol/renderer/canvas/ImageLayer.js","../ol/layer/Image.js","../ol/layer/TileProperty.js","../ol/layer/BaseTile.js","../ol/renderer/canvas/TileLayer.js","../ol/layer/Tile.js","../ol/source/Raster.js","../ol/source/Stamen.js","../ol/source/TileArcGISRest.js","../ol/source/TileDebug.js","../ol/source/TileJSON.js","../ol/source/TileWMS.js","../ol/source/UTFGrid.js","../ol/source/VectorTile.js","../ol/tilegrid/WMTS.js","../ol/source/WMTS.js","../ol/webgl.js","../ol/xml.js","../ol/webgl/BaseTileRepresentation.js","../ol/webgl/Buffer.js","../ol/webgl/ContextEventType.js","../ol/webgl/PostProcessingPass.js","../ol/vec/mat4.js","../ol/webgl/Helper.js","../ol/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* @module ol/AssertionError\n */\n\n/** @type {Object<number, string>} */\nconst messages = {\n  1: 'The view center is not defined',\n  2: 'The view resolution is not defined',\n  3: 'The view rotation is not defined',\n  4: '`image` and `src` cannot be provided at the same time',\n  5: '`imgSize` must be set when `image` is provided',\n  7: '`format` must be set when `url` is set',\n  8: 'Unknown `serverType` configured',\n  9: '`url` must be configured or set using `#setUrl()`',\n  10: 'The default `geometryFunction` can only handle `Point` geometries',\n  11: '`options.featureTypes` must be an Array',\n  12: '`options.geometryName` must also be provided when `options.bbox` is set',\n  13: 'Invalid corner',\n  14: 'Invalid color',\n  15: 'Tried to get a value for a key that does not exist in the cache',\n  16: 'Tried to set a value for a key that is used already',\n  17: '`resolutions` must be sorted in descending order',\n  18: 'Either `origin` or `origins` must be configured, never both',\n  19: 'Number of `tileSizes` and `resolutions` must be equal',\n  20: 'Number of `origins` and `resolutions` must be equal',\n  22: 'Either `tileSize` or `tileSizes` must be configured, never both',\n  24: 'Invalid extent or geometry provided as `geometry`',\n  25: 'Cannot fit empty extent provided as `geometry`',\n  26: 'Features must have an id set',\n  27: 'Features must have an id set',\n  28: '`renderMode` must be `\"hybrid\"` or `\"vector\"`',\n  30: 'The passed `feature` was already added to the source',\n  31: 'Tried to enqueue an `element` that was already added to the queue',\n  32: 'Transformation matrix cannot be inverted',\n  33: 'Invalid units',\n  34: 'Invalid geometry layout',\n  36: 'Unknown SRS type',\n  37: 'Unknown geometry type found',\n  38: '`styleMapValue` has an unknown type',\n  39: 'Unknown geometry type',\n  40: 'Expected `feature` to have a geometry',\n  41: 'Expected an `ol/style/Style` or an array of `ol/style/Style.js`',\n  42: 'Question unknown, the answer is 42',\n  43: 'Expected `layers` to be an array or a `Collection`',\n  47: 'Expected `controls` to be an array or an `ol/Collection`',\n  48: 'Expected `interactions` to be an array or an `ol/Collection`',\n  49: 'Expected `overlays` to be an array or an `ol/Collection`',\n  50: '`options.featureTypes` should be an Array',\n  51: 'Either `url` or `tileJSON` options must be provided',\n  52: 'Unknown `serverType` configured',\n  53: 'Unknown `tierSizeCalculation` configured',\n  55: 'The {-y} placeholder requires a tile grid with extent',\n  56: 'mapBrowserEvent must originate from a pointer event',\n  57: 'At least 2 conditions are required',\n  59: 'Invalid command found in the PBF',\n  60: 'Missing or invalid `size`',\n  61: 'Cannot determine IIIF Image API version from provided image information JSON',\n  62: 'A `WebGLArrayBuffer` must either be of type `ELEMENT_ARRAY_BUFFER` or `ARRAY_BUFFER`',\n  64: 'Layer opacity must be a number',\n  66: '`forEachFeatureAtCoordinate` cannot be used on a WebGL layer if the hit detection logic has not been enabled. This is done by providing adequate shaders using the `hitVertexShader` and `hitFragmentShader` properties of `WebGLPointsLayerRenderer`',\n  67: 'A layer can only be added to the map once. Use either `layer.setMap()` or `map.addLayer()`, not both',\n  68: 'A VectorTile source can only be rendered if it has a projection compatible with the view projection',\n  69: '`width` or `height` cannot be provided together with `scale`',\n};\n\n/**\n * Error object thrown when an assertion failed. This is an ECMA-262 Error,\n * extended with a `code` property.\n * See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error.\n */\nclass AssertionError extends Error {\n  /**\n   * @param {number} code Error code.\n   */\n  constructor(code) {\n    const message = messages[code];\n\n    super(message);\n\n    /**\n     * Error code. The meaning of the code can be found on\n     * https://openlayers.org/en/latest/doc/errors/ (replace `latest` with\n     * the version found in the OpenLayers script's header comment if a version\n     * other than the latest is used).\n     * @type {number}\n     * @deprecated ol/AssertionError and error codes will be removed in v8.0\n     * @api\n     */\n    this.code = code;\n\n    /**\n     * @type {string}\n     */\n    this.name = 'AssertionError';\n\n    // Re-assign message, see https://github.com/Rich-Harris/buble/issues/40\n    this.message = message;\n  }\n}\n\nexport default AssertionError;\n","/**\n * @module ol/events/Event\n */\n\n/**\n * @classdesc\n * Stripped down implementation of the W3C DOM Level 2 Event interface.\n * See https://www.w3.org/TR/DOM-Level-2-Events/events.html#Events-interface.\n *\n * This implementation only provides `type` and `target` properties, and\n * `stopPropagation` and `preventDefault` methods. It is meant as base class\n * for higher level events defined in the library, and works with\n * {@link module:ol/events/Target~Target}.\n */\nclass BaseEvent {\n  /**\n   * @param {string} type Type.\n   */\n  constructor(type) {\n    /**\n     * @type {boolean}\n     */\n    this.propagationStopped;\n\n    /**\n     * @type {boolean}\n     */\n    this.defaultPrevented;\n\n    /**\n     * The event type.\n     * @type {string}\n     * @api\n     */\n    this.type = type;\n\n    /**\n     * The event target.\n     * @type {Object}\n     * @api\n     */\n    this.target = null;\n  }\n\n  /**\n   * Prevent default. This means that no emulated `click`, `singleclick` or `doubleclick` events\n   * will be fired.\n   * @api\n   */\n  preventDefault() {\n    this.defaultPrevented = true;\n  }\n\n  /**\n   * Stop event propagation.\n   * @api\n   */\n  stopPropagation() {\n    this.propagationStopped = true;\n  }\n}\n\n/**\n * @param {Event|import(\"./Event.js\").default} evt Event\n */\nexport function stopPropagation(evt) {\n  evt.stopPropagation();\n}\n\n/**\n * @param {Event|import(\"./Event.js\").default} evt Event\n */\nexport function preventDefault(evt) {\n  evt.preventDefault();\n}\n\nexport default BaseEvent;\n","/**\n * @module ol/ObjectEventType\n */\n\n/**\n * @enum {string}\n */\nexport default {\n  /**\n   * Triggered when a property is changed.\n   * @event module:ol/Object.ObjectEvent#propertychange\n   * @api\n   */\n  PROPERTYCHANGE: 'propertychange',\n};\n\n/**\n * @typedef {'propertychange'} Types\n */\n","/**\n * @module ol/Disposable\n */\n\n/**\n * @classdesc\n * Objects that need to clean up after themselves.\n */\nclass Disposable {\n  constructor() {\n    /**\n     * The object has already been disposed.\n     * @type {boolean}\n     * @protected\n     */\n    this.disposed = false;\n  }\n\n  /**\n   * Clean up.\n   */\n  dispose() {\n    if (!this.disposed) {\n      this.disposed = true;\n      this.disposeInternal();\n    }\n  }\n\n  /**\n   * Extension point for disposable objects.\n   * @protected\n   */\n  disposeInternal() {}\n}\n\nexport default Disposable;\n","/**\n * @module ol/array\n */\n\n/**\n * Performs a binary search on the provided sorted list and returns the index of the item if found. If it can't be found it'll return -1.\n * https://github.com/darkskyapp/binary-search\n *\n * @param {Array<*>} haystack Items to search through.\n * @param {*} needle The item to look for.\n * @param {Function} [comparator] Comparator function.\n * @return {number} The index of the item if found, -1 if not.\n */\nexport function binarySearch(haystack, needle, comparator) {\n  let mid, cmp;\n  comparator = comparator || ascending;\n  let low = 0;\n  let high = haystack.length;\n  let found = false;\n\n  while (low < high) {\n    /* Note that \"(low + high) >>> 1\" may overflow, and results in a typecast\n     * to double (which gives the wrong results). */\n    mid = low + ((high - low) >> 1);\n    cmp = +comparator(haystack[mid], needle);\n\n    if (cmp < 0.0) {\n      /* Too low. */\n      low = mid + 1;\n    } else {\n      /* Key found or too high */\n      high = mid;\n      found = !cmp;\n    }\n  }\n\n  /* Key not found. */\n  return found ? low : ~low;\n}\n\n/**\n * Compare function sorting arrays in ascending order.  Safe to use for numeric values.\n * @param {*} a The first object to be compared.\n * @param {*} b The second object to be compared.\n * @return {number} A negative number, zero, or a positive number as the first\n *     argument is less than, equal to, or greater than the second.\n */\nexport function ascending(a, b) {\n  return a > b ? 1 : a < b ? -1 : 0;\n}\n\n/**\n * {@link module:ol/tilegrid/TileGrid~TileGrid#getZForResolution} can use a function\n * of this type to determine which nearest resolution to use.\n *\n * This function takes a `{number}` representing a value between two array entries,\n * a `{number}` representing the value of the nearest higher entry and\n * a `{number}` representing the value of the nearest lower entry\n * as arguments and returns a `{number}`. If a negative number or zero is returned\n * the lower value will be used, if a positive number is returned the higher value\n * will be used.\n * @typedef {function(number, number, number): number} NearestDirectionFunction\n * @api\n */\n\n/**\n * @param {Array<number>} arr Array in descending order.\n * @param {number} target Target.\n * @param {number|NearestDirectionFunction} direction\n *    0 means return the nearest,\n *    > 0 means return the largest nearest,\n *    < 0 means return the smallest nearest.\n * @return {number} Index.\n */\nexport function linearFindNearest(arr, target, direction) {\n  if (arr[0] <= target) {\n    return 0;\n  }\n\n  const n = arr.length;\n  if (target <= arr[n - 1]) {\n    return n - 1;\n  }\n\n  if (typeof direction === 'function') {\n    for (let i = 1; i < n; ++i) {\n      const candidate = arr[i];\n      if (candidate === target) {\n        return i;\n      }\n      if (candidate < target) {\n        if (direction(target, arr[i - 1], candidate) > 0) {\n          return i - 1;\n        }\n        return i;\n      }\n    }\n    return n - 1;\n  }\n\n  if (direction > 0) {\n    for (let i = 1; i < n; ++i) {\n      if (arr[i] < target) {\n        return i - 1;\n      }\n    }\n    return n - 1;\n  }\n\n  if (direction < 0) {\n    for (let i = 1; i < n; ++i) {\n      if (arr[i] <= target) {\n        return i;\n      }\n    }\n    return n - 1;\n  }\n\n  for (let i = 1; i < n; ++i) {\n    if (arr[i] == target) {\n      return i;\n    }\n    if (arr[i] < target) {\n      if (arr[i - 1] - target < target - arr[i]) {\n        return i - 1;\n      }\n      return i;\n    }\n  }\n  return n - 1;\n}\n\n/**\n * @param {Array<*>} arr Array.\n * @param {number} begin Begin index.\n * @param {number} end End index.\n */\nexport function reverseSubArray(arr, begin, end) {\n  while (begin < end) {\n    const tmp = arr[begin];\n    arr[begin] = arr[end];\n    arr[end] = tmp;\n    ++begin;\n    --end;\n  }\n}\n\n/**\n * @param {Array<VALUE>} arr The array to modify.\n * @param {!Array<VALUE>|VALUE} data The elements or arrays of elements to add to arr.\n * @template VALUE\n */\nexport function extend(arr, data) {\n  const extension = Array.isArray(data) ? data : [data];\n  const length = extension.length;\n  for (let i = 0; i < length; i++) {\n    arr[arr.length] = extension[i];\n  }\n}\n\n/**\n * @param {Array<VALUE>} arr The array to modify.\n * @param {VALUE} obj The element to remove.\n * @template VALUE\n * @return {boolean} If the element was removed.\n */\nexport function remove(arr, obj) {\n  const i = arr.indexOf(obj);\n  const found = i > -1;\n  if (found) {\n    arr.splice(i, 1);\n  }\n  return found;\n}\n\n/**\n * @param {Array|Uint8ClampedArray} arr1 The first array to compare.\n * @param {Array|Uint8ClampedArray} arr2 The second array to compare.\n * @return {boolean} Whether the two arrays are equal.\n */\nexport function equals(arr1, arr2) {\n  const len1 = arr1.length;\n  if (len1 !== arr2.length) {\n    return false;\n  }\n  for (let i = 0; i < len1; i++) {\n    if (arr1[i] !== arr2[i]) {\n      return false;\n    }\n  }\n  return true;\n}\n\n/**\n * Sort the passed array such that the relative order of equal elements is preserved.\n * See https://en.wikipedia.org/wiki/Sorting_algorithm#Stability for details.\n * @param {Array<*>} arr The array to sort (modifies original).\n * @param {!function(*, *): number} compareFnc Comparison function.\n * @api\n */\nexport function stableSort(arr, compareFnc) {\n  const length = arr.length;\n  const tmp = Array(arr.length);\n  let i;\n  for (i = 0; i < length; i++) {\n    tmp[i] = {index: i, value: arr[i]};\n  }\n  tmp.sort(function (a, b) {\n    return compareFnc(a.value, b.value) || a.index - b.index;\n  });\n  for (i = 0; i < arr.length; i++) {\n    arr[i] = tmp[i].value;\n  }\n}\n\n/**\n * @param {Array<*>} arr The array to test.\n * @param {Function} [func] Comparison function.\n * @param {boolean} [strict] Strictly sorted (default false).\n * @return {boolean} Return index.\n */\nexport function isSorted(arr, func, strict) {\n  const compare = func || ascending;\n  return arr.every(function (currentVal, index) {\n    if (index === 0) {\n      return true;\n    }\n    const res = compare(arr[index - 1], currentVal);\n    return !(res > 0 || (strict && res === 0));\n  });\n}\n","/**\n * @module ol/functions\n */\n\nimport {equals as arrayEquals} from './array.js';\n\n/**\n * Always returns true.\n * @return {boolean} true.\n */\nexport function TRUE() {\n  return true;\n}\n\n/**\n * Always returns false.\n * @return {boolean} false.\n */\nexport function FALSE() {\n  return false;\n}\n\n/**\n * A reusable function, used e.g. as a default for callbacks.\n *\n * @return {void} Nothing.\n */\nexport function VOID() {}\n\n/**\n * Wrap a function in another function that remembers the last return.  If the\n * returned function is called twice in a row with the same arguments and the same\n * this object, it will return the value from the first call in the second call.\n *\n * @param {function(...any): ReturnType} fn The function to memoize.\n * @return {function(...any): ReturnType} The memoized function.\n * @template ReturnType\n */\nexport function memoizeOne(fn) {\n  let called = false;\n\n  /** @type {ReturnType} */\n  let lastResult;\n\n  /** @type {Array<any>} */\n  let lastArgs;\n\n  let lastThis;\n\n  return function () {\n    const nextArgs = Array.prototype.slice.call(arguments);\n    if (!called || this !== lastThis || !arrayEquals(nextArgs, lastArgs)) {\n      called = true;\n      lastThis = this;\n      lastArgs = nextArgs;\n      lastResult = fn.apply(this, arguments);\n    }\n    return lastResult;\n  };\n}\n\n/**\n * @template T\n * @param {function(): (T | Promise<T>)} getter A function that returns a value or a promise for a value.\n * @return {Promise<T>} A promise for the value.\n */\nexport function toPromise(getter) {\n  function promiseGetter() {\n    let value;\n    try {\n      value = getter();\n    } catch (err) {\n      return Promise.reject(err);\n    }\n    if (value instanceof Promise) {\n      return value;\n    }\n    return Promise.resolve(value);\n  }\n  return promiseGetter();\n}\n","/**\n * @module ol/obj\n */\n\n/**\n * Removes all properties from an object.\n * @param {Object} object The object to clear.\n */\nexport function clear(object) {\n  for (const property in object) {\n    delete object[property];\n  }\n}\n\n/**\n * Determine if an object has any properties.\n * @param {Object} object The object to check.\n * @return {boolean} The object is empty.\n */\nexport function isEmpty(object) {\n  let property;\n  for (property in object) {\n    return false;\n  }\n  return !property;\n}\n","/**\n * @module ol/events/Target\n */\nimport Disposable from '../Disposable.js';\nimport Event from './Event.js';\nimport {VOID} from '../functions.js';\nimport {clear} from '../obj.js';\n\n/**\n * @typedef {EventTarget|Target} EventTargetLike\n */\n\n/**\n * @classdesc\n * A simplified implementation of the W3C DOM Level 2 EventTarget interface.\n * See https://www.w3.org/TR/2000/REC-DOM-Level-2-Events-20001113/events.html#Events-EventTarget.\n *\n * There are two important simplifications compared to the specification:\n *\n * 1. The handling of `useCapture` in `addEventListener` and\n *    `removeEventListener`. There is no real capture model.\n * 2. The handling of `stopPropagation` and `preventDefault` on `dispatchEvent`.\n *    There is no event target hierarchy. When a listener calls\n *    `stopPropagation` or `preventDefault` on an event object, it means that no\n *    more listeners after this one will be called. Same as when the listener\n *    returns false.\n */\nclass Target extends Disposable {\n  /**\n   * @param {*} [target] Default event target for dispatched events.\n   */\n  constructor(target) {\n    super();\n\n    /**\n     * @private\n     * @type {*}\n     */\n    this.eventTarget_ = target;\n\n    /**\n     * @private\n     * @type {Object<string, number>}\n     */\n    this.pendingRemovals_ = null;\n\n    /**\n     * @private\n     * @type {Object<string, number>}\n     */\n    this.dispatching_ = null;\n\n    /**\n     * @private\n     * @type {Object<string, Array<import(\"../events.js\").Listener>>}\n     */\n    this.listeners_ = null;\n  }\n\n  /**\n   * @param {string} type Type.\n   * @param {import(\"../events.js\").Listener} listener Listener.\n   */\n  addEventListener(type, listener) {\n    if (!type || !listener) {\n      return;\n    }\n    const listeners = this.listeners_ || (this.listeners_ = {});\n    const listenersForType = listeners[type] || (listeners[type] = []);\n    if (!listenersForType.includes(listener)) {\n      listenersForType.push(listener);\n    }\n  }\n\n  /**\n   * Dispatches an event and calls all listeners listening for events\n   * of this type. The event parameter can either be a string or an\n   * Object with a `type` property.\n   *\n   * @param {import(\"./Event.js\").default|string} event Event object.\n   * @return {boolean|undefined} `false` if anyone called preventDefault on the\n   *     event object or if any of the listeners returned false.\n   * @api\n   */\n  dispatchEvent(event) {\n    const isString = typeof event === 'string';\n    const type = isString ? event : event.type;\n    const listeners = this.listeners_ && this.listeners_[type];\n    if (!listeners) {\n      return;\n    }\n\n    const evt = isString ? new Event(event) : /** @type {Event} */ (event);\n    if (!evt.target) {\n      evt.target = this.eventTarget_ || this;\n    }\n    const dispatching = this.dispatching_ || (this.dispatching_ = {});\n    const pendingRemovals =\n      this.pendingRemovals_ || (this.pendingRemovals_ = {});\n    if (!(type in dispatching)) {\n      dispatching[type] = 0;\n      pendingRemovals[type] = 0;\n    }\n    ++dispatching[type];\n    let propagate;\n    for (let i = 0, ii = listeners.length; i < ii; ++i) {\n      if ('handleEvent' in listeners[i]) {\n        propagate = /** @type {import(\"../events.js\").ListenerObject} */ (\n          listeners[i]\n        ).handleEvent(evt);\n      } else {\n        propagate = /** @type {import(\"../events.js\").ListenerFunction} */ (\n          listeners[i]\n        ).call(this, evt);\n      }\n      if (propagate === false || evt.propagationStopped) {\n        propagate = false;\n        break;\n      }\n    }\n    if (--dispatching[type] === 0) {\n      let pr = pendingRemovals[type];\n      delete pendingRemovals[type];\n      while (pr--) {\n        this.removeEventListener(type, VOID);\n      }\n      delete dispatching[type];\n    }\n    return propagate;\n  }\n\n  /**\n   * Clean up.\n   */\n  disposeInternal() {\n    this.listeners_ && clear(this.listeners_);\n  }\n\n  /**\n   * Get the listeners for a specified event type. Listeners are returned in the\n   * order that they will be called in.\n   *\n   * @param {string} type Type.\n   * @return {Array<import(\"../events.js\").Listener>|undefined} Listeners.\n   */\n  getListeners(type) {\n    return (this.listeners_ && this.listeners_[type]) || undefined;\n  }\n\n  /**\n   * @param {string} [type] Type. If not provided,\n   *     `true` will be returned if this event target has any listeners.\n   * @return {boolean} Has listeners.\n   */\n  hasListener(type) {\n    if (!this.listeners_) {\n      return false;\n    }\n    return type\n      ? type in this.listeners_\n      : Object.keys(this.listeners_).length > 0;\n  }\n\n  /**\n   * @param {string} type Type.\n   * @param {import(\"../events.js\").Listener} listener Listener.\n   */\n  removeEventListener(type, listener) {\n    const listeners = this.listeners_ && this.listeners_[type];\n    if (listeners) {\n      const index = listeners.indexOf(listener);\n      if (index !== -1) {\n        if (this.pendingRemovals_ && type in this.pendingRemovals_) {\n          // make listener a no-op, and remove later in #dispatchEvent()\n          listeners[index] = VOID;\n          ++this.pendingRemovals_[type];\n        } else {\n          listeners.splice(index, 1);\n          if (listeners.length === 0) {\n            delete this.listeners_[type];\n          }\n        }\n      }\n    }\n  }\n}\n\nexport default Target;\n","/**\n * @module ol/events/EventType\n */\n\n/**\n * @enum {string}\n * @const\n */\nexport default {\n  /**\n   * Generic change event. Triggered when the revision counter is increased.\n   * @event module:ol/events/Event~BaseEvent#change\n   * @api\n   */\n  CHANGE: 'change',\n\n  /**\n   * Generic error event. Triggered when an error occurs.\n   * @event module:ol/events/Event~BaseEvent#error\n   * @api\n   */\n  ERROR: 'error',\n\n  BLUR: 'blur',\n  CLEAR: 'clear',\n  CONTEXTMENU: 'contextmenu',\n  CLICK: 'click',\n  DBLCLICK: 'dblclick',\n  DRAGENTER: 'dragenter',\n  DRAGOVER: 'dragover',\n  DROP: 'drop',\n  FOCUS: 'focus',\n  KEYDOWN: 'keydown',\n  KEYPRESS: 'keypress',\n  LOAD: 'load',\n  RESIZE: 'resize',\n  TOUCHMOVE: 'touchmove',\n  WHEEL: 'wheel',\n};\n","/**\n * @module ol/events\n */\nimport {clear} from './obj.js';\n\n/**\n * Key to use with {@link module:ol/Observable.unByKey}.\n * @typedef {Object} EventsKey\n * @property {ListenerFunction} listener Listener.\n * @property {import(\"./events/Target.js\").EventTargetLike} target Target.\n * @property {string} type Type.\n * @api\n */\n\n/**\n * Listener function. This function is called with an event object as argument.\n * When the function returns `false`, event propagation will stop.\n *\n * @typedef {function((Event|import(\"./events/Event.js\").default)): (void|boolean)} ListenerFunction\n * @api\n */\n\n/**\n * @typedef {Object} ListenerObject\n * @property {ListenerFunction} handleEvent HandleEvent listener function.\n */\n\n/**\n * @typedef {ListenerFunction|ListenerObject} Listener\n */\n\n/**\n * Registers an event listener on an event target. Inspired by\n * https://google.github.io/closure-library/api/source/closure/goog/events/events.js.src.html\n *\n * This function efficiently binds a `listener` to a `this` object, and returns\n * a key for use with {@link module:ol/events.unlistenByKey}.\n *\n * @param {import(\"./events/Target.js\").EventTargetLike} target Event target.\n * @param {string} type Event type.\n * @param {ListenerFunction} listener Listener.\n * @param {Object} [thisArg] Object referenced by the `this` keyword in the\n *     listener. Default is the `target`.\n * @param {boolean} [once] If true, add the listener as one-off listener.\n * @return {EventsKey} Unique key for the listener.\n */\nexport function listen(target, type, listener, thisArg, once) {\n  if (thisArg && thisArg !== target) {\n    listener = listener.bind(thisArg);\n  }\n  if (once) {\n    const originalListener = listener;\n    listener = function () {\n      target.removeEventListener(type, listener);\n      originalListener.apply(this, arguments);\n    };\n  }\n  const eventsKey = {\n    target: target,\n    type: type,\n    listener: listener,\n  };\n  target.addEventListener(type, listener);\n  return eventsKey;\n}\n\n/**\n * Registers a one-off event listener on an event target. Inspired by\n * https://google.github.io/closure-library/api/source/closure/goog/events/events.js.src.html\n *\n * This function efficiently binds a `listener` as self-unregistering listener\n * to a `this` object, and returns a key for use with\n * {@link module:ol/events.unlistenByKey} in case the listener needs to be\n * unregistered before it is called.\n *\n * When {@link module:ol/events.listen} is called with the same arguments after this\n * function, the self-unregistering listener will be turned into a permanent\n * listener.\n *\n * @param {import(\"./events/Target.js\").EventTargetLike} target Event target.\n * @param {string} type Event type.\n * @param {ListenerFunction} listener Listener.\n * @param {Object} [thisArg] Object referenced by the `this` keyword in the\n *     listener. Default is the `target`.\n * @return {EventsKey} Key for unlistenByKey.\n */\nexport function listenOnce(target, type, listener, thisArg) {\n  return listen(target, type, listener, thisArg, true);\n}\n\n/**\n * Unregisters event listeners on an event target. Inspired by\n * https://google.github.io/closure-library/api/source/closure/goog/events/events.js.src.html\n *\n * The argument passed to this function is the key returned from\n * {@link module:ol/events.listen} or {@link module:ol/events.listenOnce}.\n *\n * @param {EventsKey} key The key.\n */\nexport function unlistenByKey(key) {\n  if (key && key.target) {\n    key.target.removeEventListener(key.type, key.listener);\n    clear(key);\n  }\n}\n","/**\n * @module ol/Observable\n */\nimport EventTarget from './events/Target.js';\nimport EventType from './events/EventType.js';\nimport {listen, listenOnce, unlistenByKey} from './events.js';\n\n/***\n * @template {string} Type\n * @template {Event|import(\"./events/Event.js\").default} EventClass\n * @template Return\n * @typedef {(type: Type, listener: (event: EventClass) => ?) => Return} OnSignature\n */\n\n/***\n * @template {string} Type\n * @template Return\n * @typedef {(type: Type[], listener: (event: Event|import(\"./events/Event\").default) => ?) => Return extends void ? void : Return[]} CombinedOnSignature\n */\n\n/**\n * @typedef {'change'|'error'} EventTypes\n */\n\n/***\n * @template Return\n * @typedef {OnSignature<EventTypes, import(\"./events/Event.js\").default, Return> & CombinedOnSignature<EventTypes, Return>} ObservableOnSignature\n */\n\n/**\n * @classdesc\n * Abstract base class; normally only used for creating subclasses and not\n * instantiated in apps.\n * An event target providing convenient methods for listener registration\n * and unregistration. A generic `change` event is always available through\n * {@link module:ol/Observable~Observable#changed}.\n *\n * @fires import(\"./events/Event.js\").default\n * @api\n */\nclass Observable extends EventTarget {\n  constructor() {\n    super();\n\n    this.on =\n      /** @type {ObservableOnSignature<import(\"./events\").EventsKey>} */ (\n        this.onInternal\n      );\n\n    this.once =\n      /** @type {ObservableOnSignature<import(\"./events\").EventsKey>} */ (\n        this.onceInternal\n      );\n\n    this.un = /** @type {ObservableOnSignature<void>} */ (this.unInternal);\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.revision_ = 0;\n  }\n\n  /**\n   * Increases the revision counter and dispatches a 'change' event.\n   * @api\n   */\n  changed() {\n    ++this.revision_;\n    this.dispatchEvent(EventType.CHANGE);\n  }\n\n  /**\n   * Get the version number for this object.  Each time the object is modified,\n   * its version number will be incremented.\n   * @return {number} Revision.\n   * @api\n   */\n  getRevision() {\n    return this.revision_;\n  }\n\n  /**\n   * @param {string|Array<string>} type Type.\n   * @param {function((Event|import(\"./events/Event\").default)): ?} listener Listener.\n   * @return {import(\"./events.js\").EventsKey|Array<import(\"./events.js\").EventsKey>} Event key.\n   * @protected\n   */\n  onInternal(type, listener) {\n    if (Array.isArray(type)) {\n      const len = type.length;\n      const keys = new Array(len);\n      for (let i = 0; i < len; ++i) {\n        keys[i] = listen(this, type[i], listener);\n      }\n      return keys;\n    }\n    return listen(this, /** @type {string} */ (type), listener);\n  }\n\n  /**\n   * @param {string|Array<string>} type Type.\n   * @param {function((Event|import(\"./events/Event\").default)): ?} listener Listener.\n   * @return {import(\"./events.js\").EventsKey|Array<import(\"./events.js\").EventsKey>} Event key.\n   * @protected\n   */\n  onceInternal(type, listener) {\n    let key;\n    if (Array.isArray(type)) {\n      const len = type.length;\n      key = new Array(len);\n      for (let i = 0; i < len; ++i) {\n        key[i] = listenOnce(this, type[i], listener);\n      }\n    } else {\n      key = listenOnce(this, /** @type {string} */ (type), listener);\n    }\n    /** @type {Object} */ (listener).ol_key = key;\n    return key;\n  }\n\n  /**\n   * Unlisten for a certain type of event.\n   * @param {string|Array<string>} type Type.\n   * @param {function((Event|import(\"./events/Event\").default)): ?} listener Listener.\n   * @protected\n   */\n  unInternal(type, listener) {\n    const key = /** @type {Object} */ (listener).ol_key;\n    if (key) {\n      unByKey(key);\n    } else if (Array.isArray(type)) {\n      for (let i = 0, ii = type.length; i < ii; ++i) {\n        this.removeEventListener(type[i], listener);\n      }\n    } else {\n      this.removeEventListener(type, listener);\n    }\n  }\n}\n\n/**\n * Listen for a certain type of event.\n * @function\n * @param {string|Array<string>} type The event type or array of event types.\n * @param {function((Event|import(\"./events/Event\").default)): ?} listener The listener function.\n * @return {import(\"./events.js\").EventsKey|Array<import(\"./events.js\").EventsKey>} Unique key for the listener. If\n *     called with an array of event types as the first argument, the return\n *     will be an array of keys.\n * @api\n */\nObservable.prototype.on;\n\n/**\n * Listen once for a certain type of event.\n * @function\n * @param {string|Array<string>} type The event type or array of event types.\n * @param {function((Event|import(\"./events/Event\").default)): ?} listener The listener function.\n * @return {import(\"./events.js\").EventsKey|Array<import(\"./events.js\").EventsKey>} Unique key for the listener. If\n *     called with an array of event types as the first argument, the return\n *     will be an array of keys.\n * @api\n */\nObservable.prototype.once;\n\n/**\n * Unlisten for a certain type of event.\n * @function\n * @param {string|Array<string>} type The event type or array of event types.\n * @param {function((Event|import(\"./events/Event\").default)): ?} listener The listener function.\n * @api\n */\nObservable.prototype.un;\n\n/**\n * Removes an event listener using the key returned by `on()` or `once()`.\n * @param {import(\"./events.js\").EventsKey|Array<import(\"./events.js\").EventsKey>} key The key returned by `on()`\n *     or `once()` (or an array of keys).\n * @api\n */\nexport function unByKey(key) {\n  if (Array.isArray(key)) {\n    for (let i = 0, ii = key.length; i < ii; ++i) {\n      unlistenByKey(key[i]);\n    }\n  } else {\n    unlistenByKey(/** @type {import(\"./events.js\").EventsKey} */ (key));\n  }\n}\n\nexport default Observable;\n","/**\n * @module ol/util\n */\n\n/**\n * @return {never} Any return.\n */\nexport function abstract() {\n  throw new Error('Unimplemented abstract method.');\n}\n\n/**\n * Counter for getUid.\n * @type {number}\n * @private\n */\nlet uidCounter_ = 0;\n\n/**\n * Gets a unique ID for an object. This mutates the object so that further calls\n * with the same object as a parameter returns the same value. Unique IDs are generated\n * as a strictly increasing sequence. Adapted from goog.getUid.\n *\n * @param {Object} obj The object to get the unique ID for.\n * @return {string} The unique ID for the object.\n * @api\n */\nexport function getUid(obj) {\n  return obj.ol_uid || (obj.ol_uid = String(++uidCounter_));\n}\n\n/**\n * OpenLayers version.\n * @type {string}\n */\nexport const VERSION = '7.4.1-dev.1689711916309';\n","/**\n * @module ol/Object\n */\nimport Event from './events/Event.js';\nimport ObjectEventType from './ObjectEventType.js';\nimport Observable from './Observable.js';\nimport {getUid} from './util.js';\nimport {isEmpty} from './obj.js';\n\n/**\n * @classdesc\n * Events emitted by {@link module:ol/Object~BaseObject} instances are instances of this type.\n */\nexport class ObjectEvent extends Event {\n  /**\n   * @param {string} type The event type.\n   * @param {string} key The property name.\n   * @param {*} oldValue The old value for `key`.\n   */\n  constructor(type, key, oldValue) {\n    super(type);\n\n    /**\n     * The name of the property whose value is changing.\n     * @type {string}\n     * @api\n     */\n    this.key = key;\n\n    /**\n     * The old value. To get the new value use `e.target.get(e.key)` where\n     * `e` is the event object.\n     * @type {*}\n     * @api\n     */\n    this.oldValue = oldValue;\n  }\n}\n\n/***\n * @template Return\n * @typedef {import(\"./Observable\").OnSignature<import(\"./Observable\").EventTypes, import(\"./events/Event.js\").default, Return> &\n *    import(\"./Observable\").OnSignature<import(\"./ObjectEventType\").Types, ObjectEvent, Return> &\n *    import(\"./Observable\").CombinedOnSignature<import(\"./Observable\").EventTypes|import(\"./ObjectEventType\").Types, Return>} ObjectOnSignature\n */\n\n/**\n * @classdesc\n * Abstract base class; normally only used for creating subclasses and not\n * instantiated in apps.\n * Most non-trivial classes inherit from this.\n *\n * This extends {@link module:ol/Observable~Observable} with observable\n * properties, where each property is observable as well as the object as a\n * whole.\n *\n * Classes that inherit from this have pre-defined properties, to which you can\n * add your owns. The pre-defined properties are listed in this documentation as\n * 'Observable Properties', and have their own accessors; for example,\n * {@link module:ol/Map~Map} has a `target` property, accessed with\n * `getTarget()` and changed with `setTarget()`. Not all properties are however\n * settable. There are also general-purpose accessors `get()` and `set()`. For\n * example, `get('target')` is equivalent to `getTarget()`.\n *\n * The `set` accessors trigger a change event, and you can monitor this by\n * registering a listener. For example, {@link module:ol/View~View} has a\n * `center` property, so `view.on('change:center', function(evt) {...});` would\n * call the function whenever the value of the center property changes. Within\n * the function, `evt.target` would be the view, so `evt.target.getCenter()`\n * would return the new center.\n *\n * You can add your own observable properties with\n * `object.set('prop', 'value')`, and retrieve that with `object.get('prop')`.\n * You can listen for changes on that property value with\n * `object.on('change:prop', listener)`. You can get a list of all\n * properties with {@link module:ol/Object~BaseObject#getProperties}.\n *\n * Note that the observable properties are separate from standard JS properties.\n * You can, for example, give your map object a title with\n * `map.title='New title'` and with `map.set('title', 'Another title')`. The\n * first will be a `hasOwnProperty`; the second will appear in\n * `getProperties()`. Only the second is observable.\n *\n * Properties can be deleted by using the unset method. E.g.\n * object.unset('foo').\n *\n * @fires ObjectEvent\n * @api\n */\nclass BaseObject extends Observable {\n  /**\n   * @param {Object<string, *>} [values] An object with key-value pairs.\n   */\n  constructor(values) {\n    super();\n\n    /***\n     * @type {ObjectOnSignature<import(\"./events\").EventsKey>}\n     */\n    this.on;\n\n    /***\n     * @type {ObjectOnSignature<import(\"./events\").EventsKey>}\n     */\n    this.once;\n\n    /***\n     * @type {ObjectOnSignature<void>}\n     */\n    this.un;\n\n    // Call {@link module:ol/util.getUid} to ensure that the order of objects' ids is\n    // the same as the order in which they were created.  This also helps to\n    // ensure that object properties are always added in the same order, which\n    // helps many JavaScript engines generate faster code.\n    getUid(this);\n\n    /**\n     * @private\n     * @type {Object<string, *>}\n     */\n    this.values_ = null;\n\n    if (values !== undefined) {\n      this.setProperties(values);\n    }\n  }\n\n  /**\n   * Gets a value.\n   * @param {string} key Key name.\n   * @return {*} Value.\n   * @api\n   */\n  get(key) {\n    let value;\n    if (this.values_ && this.values_.hasOwnProperty(key)) {\n      value = this.values_[key];\n    }\n    return value;\n  }\n\n  /**\n   * Get a list of object property names.\n   * @return {Array<string>} List of property names.\n   * @api\n   */\n  getKeys() {\n    return (this.values_ && Object.keys(this.values_)) || [];\n  }\n\n  /**\n   * Get an object of all property names and values.\n   * @return {Object<string, *>} Object.\n   * @api\n   */\n  getProperties() {\n    return (this.values_ && Object.assign({}, this.values_)) || {};\n  }\n\n  /**\n   * @return {boolean} The object has properties.\n   */\n  hasProperties() {\n    return !!this.values_;\n  }\n\n  /**\n   * @param {string} key Key name.\n   * @param {*} oldValue Old value.\n   */\n  notify(key, oldValue) {\n    let eventType;\n    eventType = `change:${key}`;\n    if (this.hasListener(eventType)) {\n      this.dispatchEvent(new ObjectEvent(eventType, key, oldValue));\n    }\n    eventType = ObjectEventType.PROPERTYCHANGE;\n    if (this.hasListener(eventType)) {\n      this.dispatchEvent(new ObjectEvent(eventType, key, oldValue));\n    }\n  }\n\n  /**\n   * @param {string} key Key name.\n   * @param {import(\"./events.js\").Listener} listener Listener.\n   */\n  addChangeListener(key, listener) {\n    this.addEventListener(`change:${key}`, listener);\n  }\n\n  /**\n   * @param {string} key Key name.\n   * @param {import(\"./events.js\").Listener} listener Listener.\n   */\n  removeChangeListener(key, listener) {\n    this.removeEventListener(`change:${key}`, listener);\n  }\n\n  /**\n   * Sets a value.\n   * @param {string} key Key name.\n   * @param {*} value Value.\n   * @param {boolean} [silent] Update without triggering an event.\n   * @api\n   */\n  set(key, value, silent) {\n    const values = this.values_ || (this.values_ = {});\n    if (silent) {\n      values[key] = value;\n    } else {\n      const oldValue = values[key];\n      values[key] = value;\n      if (oldValue !== value) {\n        this.notify(key, oldValue);\n      }\n    }\n  }\n\n  /**\n   * Sets a collection of key-value pairs.  Note that this changes any existing\n   * properties and adds new ones (it does not remove any existing properties).\n   * @param {Object<string, *>} values Values.\n   * @param {boolean} [silent] Update without triggering an event.\n   * @api\n   */\n  setProperties(values, silent) {\n    for (const key in values) {\n      this.set(key, values[key], silent);\n    }\n  }\n\n  /**\n   * Apply any properties from another object without triggering events.\n   * @param {BaseObject} source The source object.\n   * @protected\n   */\n  applyProperties(source) {\n    if (!source.values_) {\n      return;\n    }\n    Object.assign(this.values_ || (this.values_ = {}), source.values_);\n  }\n\n  /**\n   * Unsets a property.\n   * @param {string} key Key name.\n   * @param {boolean} [silent] Unset without triggering an event.\n   * @api\n   */\n  unset(key, silent) {\n    if (this.values_ && key in this.values_) {\n      const oldValue = this.values_[key];\n      delete this.values_[key];\n      if (isEmpty(this.values_)) {\n        this.values_ = null;\n      }\n      if (!silent) {\n        this.notify(key, oldValue);\n      }\n    }\n  }\n}\n\nexport default BaseObject;\n","/**\n * @module ol/CollectionEventType\n */\n\n/**\n * @enum {string}\n */\nexport default {\n  /**\n   * Triggered when an item is added to the collection.\n   * @event module:ol/Collection.CollectionEvent#add\n   * @api\n   */\n  ADD: 'add',\n  /**\n   * Triggered when an item is removed from the collection.\n   * @event module:ol/Collection.CollectionEvent#remove\n   * @api\n   */\n  REMOVE: 'remove',\n};\n","/**\n * @module ol/Collection\n */\nimport AssertionError from './AssertionError.js';\nimport BaseObject from './Object.js';\nimport CollectionEventType from './CollectionEventType.js';\nimport Event from './events/Event.js';\n\n/**\n * @enum {string}\n * @private\n */\nconst Property = {\n  LENGTH: 'length',\n};\n\n/**\n * @classdesc\n * Events emitted by {@link module:ol/Collection~Collection} instances are instances of this\n * type.\n * @template T\n */\nexport class CollectionEvent extends Event {\n  /**\n   * @param {import(\"./CollectionEventType.js\").default} type Type.\n   * @param {T} element Element.\n   * @param {number} index The index of the added or removed element.\n   */\n  constructor(type, element, index) {\n    super(type);\n\n    /**\n     * The element that is added to or removed from the collection.\n     * @type {T}\n     * @api\n     */\n    this.element = element;\n\n    /**\n     * The index of the added or removed element.\n     * @type {number}\n     * @api\n     */\n    this.index = index;\n  }\n}\n\n/***\n * @template T\n * @template Return\n * @typedef {import(\"./Observable\").OnSignature<import(\"./Observable\").EventTypes, import(\"./events/Event.js\").default, Return> &\n *   import(\"./Observable\").OnSignature<import(\"./ObjectEventType\").Types|'change:length', import(\"./Object\").ObjectEvent, Return> &\n *   import(\"./Observable\").OnSignature<'add'|'remove', CollectionEvent<T>, Return> &\n *   import(\"./Observable\").CombinedOnSignature<import(\"./Observable\").EventTypes|import(\"./ObjectEventType\").Types|\n *     'change:length'|'add'|'remove',Return>} CollectionOnSignature\n */\n\n/**\n * @typedef {Object} Options\n * @property {boolean} [unique=false] Disallow the same item from being added to\n * the collection twice.\n */\n\n/**\n * @classdesc\n * An expanded version of standard JS Array, adding convenience methods for\n * manipulation. Add and remove changes to the Collection trigger a Collection\n * event. Note that this does not cover changes to the objects _within_ the\n * Collection; they trigger events on the appropriate object, not on the\n * Collection as a whole.\n *\n * @fires CollectionEvent\n *\n * @template T\n * @api\n */\nclass Collection extends BaseObject {\n  /**\n   * @param {Array<T>} [array] Array.\n   * @param {Options} [options] Collection options.\n   */\n  constructor(array, options) {\n    super();\n\n    /***\n     * @type {CollectionOnSignature<T, import(\"./events\").EventsKey>}\n     */\n    this.on;\n\n    /***\n     * @type {CollectionOnSignature<T, import(\"./events\").EventsKey>}\n     */\n    this.once;\n\n    /***\n     * @type {CollectionOnSignature<T, void>}\n     */\n    this.un;\n\n    options = options || {};\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.unique_ = !!options.unique;\n\n    /**\n     * @private\n     * @type {!Array<T>}\n     */\n    this.array_ = array ? array : [];\n\n    if (this.unique_) {\n      for (let i = 0, ii = this.array_.length; i < ii; ++i) {\n        this.assertUnique_(this.array_[i], i);\n      }\n    }\n\n    this.updateLength_();\n  }\n\n  /**\n   * Remove all elements from the collection.\n   * @api\n   */\n  clear() {\n    while (this.getLength() > 0) {\n      this.pop();\n    }\n  }\n\n  /**\n   * Add elements to the collection.  This pushes each item in the provided array\n   * to the end of the collection.\n   * @param {!Array<T>} arr Array.\n   * @return {Collection<T>} This collection.\n   * @api\n   */\n  extend(arr) {\n    for (let i = 0, ii = arr.length; i < ii; ++i) {\n      this.push(arr[i]);\n    }\n    return this;\n  }\n\n  /**\n   * Iterate over each element, calling the provided callback.\n   * @param {function(T, number, Array<T>): *} f The function to call\n   *     for every element. This function takes 3 arguments (the element, the\n   *     index and the array). The return value is ignored.\n   * @api\n   */\n  forEach(f) {\n    const array = this.array_;\n    for (let i = 0, ii = array.length; i < ii; ++i) {\n      f(array[i], i, array);\n    }\n  }\n\n  /**\n   * Get a reference to the underlying Array object. Warning: if the array\n   * is mutated, no events will be dispatched by the collection, and the\n   * collection's \"length\" property won't be in sync with the actual length\n   * of the array.\n   * @return {!Array<T>} Array.\n   * @api\n   */\n  getArray() {\n    return this.array_;\n  }\n\n  /**\n   * Get the element at the provided index.\n   * @param {number} index Index.\n   * @return {T} Element.\n   * @api\n   */\n  item(index) {\n    return this.array_[index];\n  }\n\n  /**\n   * Get the length of this collection.\n   * @return {number} The length of the array.\n   * @observable\n   * @api\n   */\n  getLength() {\n    return this.get(Property.LENGTH);\n  }\n\n  /**\n   * Insert an element at the provided index.\n   * @param {number} index Index.\n   * @param {T} elem Element.\n   * @api\n   */\n  insertAt(index, elem) {\n    if (index < 0 || index > this.getLength()) {\n      throw new Error('Index out of bounds: ' + index);\n    }\n    if (this.unique_) {\n      this.assertUnique_(elem);\n    }\n    this.array_.splice(index, 0, elem);\n    this.updateLength_();\n    this.dispatchEvent(\n      new CollectionEvent(CollectionEventType.ADD, elem, index)\n    );\n  }\n\n  /**\n   * Remove the last element of the collection and return it.\n   * Return `undefined` if the collection is empty.\n   * @return {T|undefined} Element.\n   * @api\n   */\n  pop() {\n    return this.removeAt(this.getLength() - 1);\n  }\n\n  /**\n   * Insert the provided element at the end of the collection.\n   * @param {T} elem Element.\n   * @return {number} New length of the collection.\n   * @api\n   */\n  push(elem) {\n    if (this.unique_) {\n      this.assertUnique_(elem);\n    }\n    const n = this.getLength();\n    this.insertAt(n, elem);\n    return this.getLength();\n  }\n\n  /**\n   * Remove the first occurrence of an element from the collection.\n   * @param {T} elem Element.\n   * @return {T|undefined} The removed element or undefined if none found.\n   * @api\n   */\n  remove(elem) {\n    const arr = this.array_;\n    for (let i = 0, ii = arr.length; i < ii; ++i) {\n      if (arr[i] === elem) {\n        return this.removeAt(i);\n      }\n    }\n    return undefined;\n  }\n\n  /**\n   * Remove the element at the provided index and return it.\n   * Return `undefined` if the collection does not contain this index.\n   * @param {number} index Index.\n   * @return {T|undefined} Value.\n   * @api\n   */\n  removeAt(index) {\n    if (index < 0 || index >= this.getLength()) {\n      return undefined;\n    }\n    const prev = this.array_[index];\n    this.array_.splice(index, 1);\n    this.updateLength_();\n    this.dispatchEvent(\n      /** @type {CollectionEvent<T>} */ (\n        new CollectionEvent(CollectionEventType.REMOVE, prev, index)\n      )\n    );\n    return prev;\n  }\n\n  /**\n   * Set the element at the provided index.\n   * @param {number} index Index.\n   * @param {T} elem Element.\n   * @api\n   */\n  setAt(index, elem) {\n    const n = this.getLength();\n    if (index >= n) {\n      this.insertAt(index, elem);\n      return;\n    }\n    if (index < 0) {\n      throw new Error('Index out of bounds: ' + index);\n    }\n    if (this.unique_) {\n      this.assertUnique_(elem, index);\n    }\n    const prev = this.array_[index];\n    this.array_[index] = elem;\n    this.dispatchEvent(\n      /** @type {CollectionEvent<T>} */ (\n        new CollectionEvent(CollectionEventType.REMOVE, prev, index)\n      )\n    );\n    this.dispatchEvent(\n      /** @type {CollectionEvent<T>} */ (\n        new CollectionEvent(CollectionEventType.ADD, elem, index)\n      )\n    );\n  }\n\n  /**\n   * @private\n   */\n  updateLength_() {\n    this.set(Property.LENGTH, this.array_.length);\n  }\n\n  /**\n   * @private\n   * @param {T} elem Element.\n   * @param {number} [except] Optional index to ignore.\n   */\n  assertUnique_(elem, except) {\n    for (let i = 0, ii = this.array_.length; i < ii; ++i) {\n      if (this.array_[i] === elem && i !== except) {\n        throw new AssertionError(58);\n      }\n    }\n  }\n}\n\nexport default Collection;\n","/**\n * @module ol/TileState\n */\n\n/**\n * @enum {number}\n */\nexport default {\n  IDLE: 0,\n  LOADING: 1,\n  LOADED: 2,\n  /**\n   * Indicates that tile loading failed\n   * @type {number}\n   */\n  ERROR: 3,\n  EMPTY: 4,\n};\n","/**\n * @module ol/easing\n */\n\n/**\n * Start slow and speed up.\n * @param {number} t Input between 0 and 1.\n * @return {number} Output between 0 and 1.\n * @api\n */\nexport function easeIn(t) {\n  return Math.pow(t, 3);\n}\n\n/**\n * Start fast and slow down.\n * @param {number} t Input between 0 and 1.\n * @return {number} Output between 0 and 1.\n * @api\n */\nexport function easeOut(t) {\n  return 1 - easeIn(1 - t);\n}\n\n/**\n * Start slow, speed up, and then slow down again.\n * @param {number} t Input between 0 and 1.\n * @return {number} Output between 0 and 1.\n * @api\n */\nexport function inAndOut(t) {\n  return 3 * t * t - 2 * t * t * t;\n}\n\n/**\n * Maintain a constant speed over time.\n * @param {number} t Input between 0 and 1.\n * @return {number} Output between 0 and 1.\n * @api\n */\nexport function linear(t) {\n  return t;\n}\n\n/**\n * Start slow, speed up, and at the very end slow down again.  This has the\n * same general behavior as {@link module:ol/easing.inAndOut}, but the final\n * slowdown is delayed.\n * @param {number} t Input between 0 and 1.\n * @return {number} Output between 0 and 1.\n * @api\n */\nexport function upAndDown(t) {\n  if (t < 0.5) {\n    return inAndOut(2 * t);\n  }\n  return 1 - inAndOut(2 * (t - 0.5));\n}\n","/**\n * @module ol/Tile\n */\nimport EventTarget from './events/Target.js';\nimport EventType from './events/EventType.js';\nimport TileState from './TileState.js';\nimport {abstract} from './util.js';\nimport {easeIn} from './easing.js';\n\n/**\n * A function that takes an {@link module:ol/Tile~Tile} for the tile and a\n * `{string}` for the url as arguments. The default is\n * ```js\n * source.setTileLoadFunction(function(tile, src) {\n *   tile.getImage().src = src;\n * });\n * ```\n * For more fine grained control, the load function can use fetch or XMLHttpRequest and involve\n * error handling:\n *\n * ```js\n * import TileState from 'ol/TileState.js';\n *\n * source.setTileLoadFunction(function(tile, src) {\n *   const xhr = new XMLHttpRequest();\n *   xhr.responseType = 'blob';\n *   xhr.addEventListener('loadend', function (evt) {\n *     const data = this.response;\n *     if (data !== undefined) {\n *       tile.getImage().src = URL.createObjectURL(data);\n *     } else {\n *       tile.setState(TileState.ERROR);\n *     }\n *   });\n *   xhr.addEventListener('error', function () {\n *     tile.setState(TileState.ERROR);\n *   });\n *   xhr.open('GET', src);\n *   xhr.send();\n * });\n * ```\n *\n * @typedef {function(Tile, string): void} LoadFunction\n * @api\n */\n\n/**\n * {@link module:ol/source/Tile~TileSource} sources use a function of this type to get\n * the url that provides a tile for a given tile coordinate.\n *\n * This function takes an {@link module:ol/tilecoord~TileCoord} for the tile\n * coordinate, a `{number}` representing the pixel ratio and a\n * {@link module:ol/proj/Projection~Projection} for the projection  as arguments\n * and returns a `{string}` representing the tile URL, or undefined if no tile\n * should be requested for the passed tile coordinate.\n *\n * @typedef {function(import(\"./tilecoord.js\").TileCoord, number,\n *           import(\"./proj/Projection.js\").default): (string|undefined)} UrlFunction\n * @api\n */\n\n/**\n * @typedef {Object} Options\n * @property {number} [transition=250] A duration for tile opacity\n * transitions in milliseconds. A duration of 0 disables the opacity transition.\n * @property {boolean} [interpolate=false] Use interpolated values when resampling.  By default,\n * the nearest neighbor is used when resampling.\n * @api\n */\n\n/**\n * @classdesc\n * Base class for tiles.\n *\n * @abstract\n */\nclass Tile extends EventTarget {\n  /**\n   * @param {import(\"./tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n   * @param {import(\"./TileState.js\").default} state State.\n   * @param {Options} [options] Tile options.\n   */\n  constructor(tileCoord, state, options) {\n    super();\n\n    options = options ? options : {};\n\n    /**\n     * @type {import(\"./tilecoord.js\").TileCoord}\n     */\n    this.tileCoord = tileCoord;\n\n    /**\n     * @protected\n     * @type {import(\"./TileState.js\").default}\n     */\n    this.state = state;\n\n    /**\n     * An \"interim\" tile for this tile. The interim tile may be used while this\n     * one is loading, for \"smooth\" transitions when changing params/dimensions\n     * on the source.\n     * @type {Tile}\n     */\n    this.interimTile = null;\n\n    /**\n     * A key assigned to the tile. This is used by the tile source to determine\n     * if this tile can effectively be used, or if a new tile should be created\n     * and this one be used as an interim tile for this new tile.\n     * @type {string}\n     */\n    this.key = '';\n\n    /**\n     * The duration for the opacity transition.\n     * @type {number}\n     */\n    this.transition_ =\n      options.transition === undefined ? 250 : options.transition;\n\n    /**\n     * Lookup of start times for rendering transitions.  If the start time is\n     * equal to -1, the transition is complete.\n     * @type {Object<string, number>}\n     */\n    this.transitionStarts_ = {};\n\n    /**\n     * @type {boolean}\n     */\n    this.interpolate = !!options.interpolate;\n  }\n\n  /**\n   * @protected\n   */\n  changed() {\n    this.dispatchEvent(EventType.CHANGE);\n  }\n\n  /**\n   * Called by the tile cache when the tile is removed from the cache due to expiry\n   */\n  release() {\n    if (this.state === TileState.ERROR) {\n      // to remove the `change` listener on this tile in `ol/TileQueue#handleTileChange`\n      this.setState(TileState.EMPTY);\n    }\n  }\n\n  /**\n   * @return {string} Key.\n   */\n  getKey() {\n    return this.key + '/' + this.tileCoord;\n  }\n\n  /**\n   * Get the interim tile most suitable for rendering using the chain of interim\n   * tiles. This corresponds to the  most recent tile that has been loaded, if no\n   * such tile exists, the original tile is returned.\n   * @return {!Tile} Best tile for rendering.\n   */\n  getInterimTile() {\n    if (!this.interimTile) {\n      //empty chain\n      return this;\n    }\n    let tile = this.interimTile;\n\n    // find the first loaded tile and return it. Since the chain is sorted in\n    // decreasing order of creation time, there is no need to search the remainder\n    // of the list (all those tiles correspond to older requests and will be\n    // cleaned up by refreshInterimChain)\n    do {\n      if (tile.getState() == TileState.LOADED) {\n        // Show tile immediately instead of fading it in after loading, because\n        // the interim tile is in place already\n        this.transition_ = 0;\n        return tile;\n      }\n      tile = tile.interimTile;\n    } while (tile);\n\n    // we can not find a better tile\n    return this;\n  }\n\n  /**\n   * Goes through the chain of interim tiles and discards sections of the chain\n   * that are no longer relevant.\n   */\n  refreshInterimChain() {\n    if (!this.interimTile) {\n      return;\n    }\n\n    let tile = this.interimTile;\n\n    /**\n     * @type {Tile}\n     */\n    let prev = this;\n\n    do {\n      if (tile.getState() == TileState.LOADED) {\n        //we have a loaded tile, we can discard the rest of the list\n        //we would could abort any LOADING tile request\n        //older than this tile (i.e. any LOADING tile following this entry in the chain)\n        tile.interimTile = null;\n        break;\n      } else if (tile.getState() == TileState.LOADING) {\n        //keep this LOADING tile any loaded tiles later in the chain are\n        //older than this tile, so we're still interested in the request\n        prev = tile;\n      } else if (tile.getState() == TileState.IDLE) {\n        //the head of the list is the most current tile, we don't need\n        //to start any other requests for this chain\n        prev.interimTile = tile.interimTile;\n      } else {\n        prev = tile;\n      }\n      tile = prev.interimTile;\n    } while (tile);\n  }\n\n  /**\n   * Get the tile coordinate for this tile.\n   * @return {import(\"./tilecoord.js\").TileCoord} The tile coordinate.\n   * @api\n   */\n  getTileCoord() {\n    return this.tileCoord;\n  }\n\n  /**\n   * @return {import(\"./TileState.js\").default} State.\n   */\n  getState() {\n    return this.state;\n  }\n\n  /**\n   * Sets the state of this tile. If you write your own {@link module:ol/Tile~LoadFunction tileLoadFunction} ,\n   * it is important to set the state correctly to {@link module:ol/TileState~ERROR}\n   * when the tile cannot be loaded. Otherwise the tile cannot be removed from\n   * the tile queue and will block other requests.\n   * @param {import(\"./TileState.js\").default} state State.\n   * @api\n   */\n  setState(state) {\n    if (this.state !== TileState.ERROR && this.state > state) {\n      throw new Error('Tile load sequence violation');\n    }\n    this.state = state;\n    this.changed();\n  }\n\n  /**\n   * Load the image or retry if loading previously failed.\n   * Loading is taken care of by the tile queue, and calling this method is\n   * only needed for preloading or for reloading in case of an error.\n   * @abstract\n   * @api\n   */\n  load() {\n    abstract();\n  }\n\n  /**\n   * Get the alpha value for rendering.\n   * @param {string} id An id for the renderer.\n   * @param {number} time The render frame time.\n   * @return {number} A number between 0 and 1.\n   */\n  getAlpha(id, time) {\n    if (!this.transition_) {\n      return 1;\n    }\n\n    let start = this.transitionStarts_[id];\n    if (!start) {\n      start = time;\n      this.transitionStarts_[id] = start;\n    } else if (start === -1) {\n      return 1;\n    }\n\n    const delta = time - start + 1000 / 60; // avoid rendering at 0\n    if (delta >= this.transition_) {\n      return 1;\n    }\n    return easeIn(delta / this.transition_);\n  }\n\n  /**\n   * Determine if a tile is in an alpha transition.  A tile is considered in\n   * transition if tile.getAlpha() has not yet been called or has been called\n   * and returned 1.\n   * @param {string} id An id for the renderer.\n   * @return {boolean} The tile is in transition.\n   */\n  inTransition(id) {\n    if (!this.transition_) {\n      return false;\n    }\n    return this.transitionStarts_[id] !== -1;\n  }\n\n  /**\n   * Mark a transition as complete.\n   * @param {string} id An id for the renderer.\n   */\n  endTransition(id) {\n    if (this.transition_) {\n      this.transitionStarts_[id] = -1;\n    }\n  }\n}\n\nexport default Tile;\n","/**\n * @module ol/has\n */\n\nconst ua =\n  typeof navigator !== 'undefined' && typeof navigator.userAgent !== 'undefined'\n    ? navigator.userAgent.toLowerCase()\n    : '';\n\n/**\n * User agent string says we are dealing with Firefox as browser.\n * @type {boolean}\n */\nexport const FIREFOX = ua.includes('firefox');\n\n/**\n * User agent string says we are dealing with Safari as browser.\n * @type {boolean}\n */\nexport const SAFARI = ua.includes('safari') && !ua.includes('chrom');\n\n/**\n * https://bugs.webkit.org/show_bug.cgi?id=237906\n * @type {boolean}\n */\nexport const SAFARI_BUG_237906 =\n  SAFARI &&\n  (ua.includes('version/15.4') ||\n    /cpu (os|iphone os) 15_4 like mac os x/.test(ua));\n\n/**\n * User agent string says we are dealing with a WebKit engine.\n * @type {boolean}\n */\nexport const WEBKIT = ua.includes('webkit') && !ua.includes('edge');\n\n/**\n * User agent string says we are dealing with a Mac as platform.\n * @type {boolean}\n */\nexport const MAC = ua.includes('macintosh');\n\n/**\n * The ratio between physical pixels and device-independent pixels\n * (dips) on the device (`window.devicePixelRatio`).\n * @const\n * @type {number}\n * @api\n */\nexport const DEVICE_PIXEL_RATIO =\n  typeof devicePixelRatio !== 'undefined' ? devicePixelRatio : 1;\n\n/**\n * The execution context is a worker with OffscreenCanvas available.\n * @const\n * @type {boolean}\n */\nexport const WORKER_OFFSCREEN_CANVAS =\n  typeof WorkerGlobalScope !== 'undefined' &&\n  typeof OffscreenCanvas !== 'undefined' &&\n  self instanceof WorkerGlobalScope; //eslint-disable-line\n\n/**\n * Image.prototype.decode() is supported.\n * @type {boolean}\n */\nexport const IMAGE_DECODE =\n  typeof Image !== 'undefined' && Image.prototype.decode;\n\n/**\n * @type {boolean}\n */\nexport const PASSIVE_EVENT_LISTENERS = (function () {\n  let passive = false;\n  try {\n    const options = Object.defineProperty({}, 'passive', {\n      get: function () {\n        passive = true;\n      },\n    });\n\n    window.addEventListener('_', null, options);\n    window.removeEventListener('_', null, options);\n  } catch (error) {\n    // passive not supported\n  }\n  return passive;\n})();\n","import {WORKER_OFFSCREEN_CANVAS} from './has.js';\n\n/**\n * @module ol/dom\n */\n\n//FIXME Move this function to the canvas module\n/**\n * Create an html canvas element and returns its 2d context.\n * @param {number} [width] Canvas width.\n * @param {number} [height] Canvas height.\n * @param {Array<HTMLCanvasElement>} [canvasPool] Canvas pool to take existing canvas from.\n * @param {CanvasRenderingContext2DSettings} [settings] CanvasRenderingContext2DSettings\n * @return {CanvasRenderingContext2D} The context.\n */\nexport function createCanvasContext2D(width, height, canvasPool, settings) {\n  /** @type {HTMLCanvasElement|OffscreenCanvas} */\n  let canvas;\n  if (canvasPool && canvasPool.length) {\n    canvas = canvasPool.shift();\n  } else if (WORKER_OFFSCREEN_CANVAS) {\n    canvas = new OffscreenCanvas(width || 300, height || 300);\n  } else {\n    canvas = document.createElement('canvas');\n  }\n  if (width) {\n    canvas.width = width;\n  }\n  if (height) {\n    canvas.height = height;\n  }\n  //FIXME Allow OffscreenCanvasRenderingContext2D as return type\n  return /** @type {CanvasRenderingContext2D} */ (\n    canvas.getContext('2d', settings)\n  );\n}\n\n/**\n * Releases canvas memory to avoid exceeding memory limits in Safari.\n * See https://pqina.nl/blog/total-canvas-memory-use-exceeds-the-maximum-limit/\n * @param {CanvasRenderingContext2D} context Context.\n */\nexport function releaseCanvas(context) {\n  const canvas = context.canvas;\n  canvas.width = 1;\n  canvas.height = 1;\n  context.clearRect(0, 0, 1, 1);\n}\n\n/**\n * Get the current computed width for the given element including margin,\n * padding and border.\n * Equivalent to jQuery's `$(el).outerWidth(true)`.\n * @param {!HTMLElement} element Element.\n * @return {number} The width.\n */\nexport function outerWidth(element) {\n  let width = element.offsetWidth;\n  const style = getComputedStyle(element);\n  width += parseInt(style.marginLeft, 10) + parseInt(style.marginRight, 10);\n\n  return width;\n}\n\n/**\n * Get the current computed height for the given element including margin,\n * padding and border.\n * Equivalent to jQuery's `$(el).outerHeight(true)`.\n * @param {!HTMLElement} element Element.\n * @return {number} The height.\n */\nexport function outerHeight(element) {\n  let height = element.offsetHeight;\n  const style = getComputedStyle(element);\n  height += parseInt(style.marginTop, 10) + parseInt(style.marginBottom, 10);\n\n  return height;\n}\n\n/**\n * @param {Node} newNode Node to replace old node\n * @param {Node} oldNode The node to be replaced\n */\nexport function replaceNode(newNode, oldNode) {\n  const parent = oldNode.parentNode;\n  if (parent) {\n    parent.replaceChild(newNode, oldNode);\n  }\n}\n\n/**\n * @param {Node} node The node to remove.\n * @return {Node|null} The node that was removed or null.\n */\nexport function removeNode(node) {\n  return node && node.parentNode ? node.parentNode.removeChild(node) : null;\n}\n\n/**\n * @param {Node} node The node to remove the children from.\n */\nexport function removeChildren(node) {\n  while (node.lastChild) {\n    node.removeChild(node.lastChild);\n  }\n}\n\n/**\n * Transform the children of a parent node so they match the\n * provided list of children.  This function aims to efficiently\n * remove, add, and reorder child nodes while maintaining a simple\n * implementation (it is not guaranteed to minimize DOM operations).\n * @param {Node} node The parent node whose children need reworking.\n * @param {Array<Node>} children The desired children.\n */\nexport function replaceChildren(node, children) {\n  const oldChildren = node.childNodes;\n\n  for (let i = 0; true; ++i) {\n    const oldChild = oldChildren[i];\n    const newChild = children[i];\n\n    // check if our work is done\n    if (!oldChild && !newChild) {\n      break;\n    }\n\n    // check if children match\n    if (oldChild === newChild) {\n      continue;\n    }\n\n    // check if a new child needs to be added\n    if (!oldChild) {\n      node.appendChild(newChild);\n      continue;\n    }\n\n    // check if an old child needs to be removed\n    if (!newChild) {\n      node.removeChild(oldChild);\n      --i;\n      continue;\n    }\n\n    // reorder\n    node.insertBefore(newChild, oldChild);\n  }\n}\n","/**\n * @module ol/DataTile\n */\nimport Tile from './Tile.js';\nimport TileState from './TileState.js';\nimport {createCanvasContext2D} from './dom.js';\n\n/**\n * @typedef {HTMLImageElement|HTMLCanvasElement|HTMLVideoElement} ImageLike\n */\n\n/**\n * @typedef {Uint8Array|Uint8ClampedArray|Float32Array|DataView} ArrayLike\n */\n\n/**\n * Data that can be used with a DataTile.\n * @typedef {ArrayLike|ImageLike} Data\n */\n\n/**\n * @param {Data} data Tile data.\n * @return {ImageLike|null} The image-like data.\n */\nexport function asImageLike(data) {\n  return data instanceof Image ||\n    data instanceof HTMLCanvasElement ||\n    data instanceof HTMLVideoElement\n    ? data\n    : null;\n}\n\n/**\n * @param {Data} data Tile data.\n * @return {ArrayLike|null} The array-like data.\n */\nexport function asArrayLike(data) {\n  return data instanceof Uint8Array ||\n    data instanceof Uint8ClampedArray ||\n    data instanceof Float32Array ||\n    data instanceof DataView\n    ? data\n    : null;\n}\n\n/**\n * @type {CanvasRenderingContext2D|null}\n */\nlet sharedContext = null;\n\n/**\n * @param {ImageLike} image The image.\n * @return {Uint8ClampedArray} The data.\n */\nexport function toArray(image) {\n  if (!sharedContext) {\n    sharedContext = createCanvasContext2D(\n      image.width,\n      image.height,\n      undefined,\n      {willReadFrequently: true}\n    );\n  }\n  const canvas = sharedContext.canvas;\n  const width = image.width;\n  if (canvas.width !== width) {\n    canvas.width = width;\n  }\n  const height = image.height;\n  if (canvas.height !== height) {\n    canvas.height = height;\n  }\n  sharedContext.clearRect(0, 0, width, height);\n  sharedContext.drawImage(image, 0, 0);\n  return sharedContext.getImageData(0, 0, width, height).data;\n}\n\n/**\n * @type {import('./size.js').Size}\n */\nconst defaultSize = [256, 256];\n\n/**\n * @typedef {Object} Options\n * @property {import(\"./tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n * @property {function(): Promise<Data>} loader Data loader.  For loaders that generate images,\n * the promise should not resolve until the image is loaded.\n * @property {number} [transition=250] A duration for tile opacity\n * transitions in milliseconds. A duration of 0 disables the opacity transition.\n * @property {boolean} [interpolate=false] Use interpolated values when resampling.  By default,\n * the nearest neighbor is used when resampling.\n * @property {import('./size.js').Size} [size=[256, 256]] Tile size.\n * @api\n */\n\nclass DataTile extends Tile {\n  /**\n   * @param {Options} options Tile options.\n   */\n  constructor(options) {\n    const state = TileState.IDLE;\n\n    super(options.tileCoord, state, {\n      transition: options.transition,\n      interpolate: options.interpolate,\n    });\n\n    /**\n     * @type {function(): Promise<Data>}\n     * @private\n     */\n    this.loader_ = options.loader;\n\n    /**\n     * @type {Data}\n     * @private\n     */\n    this.data_ = null;\n\n    /**\n     * @type {Error}\n     * @private\n     */\n    this.error_ = null;\n\n    /**\n     * @type {import('./size.js').Size|null}\n     * @private\n     */\n    this.size_ = options.size || null;\n  }\n\n  /**\n   * Get the tile size.\n   * @return {import('./size.js').Size} Tile size.\n   */\n  getSize() {\n    if (this.size_) {\n      return this.size_;\n    }\n    const imageData = asImageLike(this.data_);\n    if (imageData) {\n      return [imageData.width, imageData.height];\n    }\n    return defaultSize;\n  }\n\n  /**\n   * Get the data for the tile.\n   * @return {Data} Tile data.\n   * @api\n   */\n  getData() {\n    return this.data_;\n  }\n\n  /**\n   * Get any loading error.\n   * @return {Error} Loading error.\n   * @api\n   */\n  getError() {\n    return this.error_;\n  }\n\n  /**\n   * Load not yet loaded URI.\n   * @api\n   */\n  load() {\n    if (this.state !== TileState.IDLE && this.state !== TileState.ERROR) {\n      return;\n    }\n    this.state = TileState.LOADING;\n    this.changed();\n\n    const self = this;\n    this.loader_()\n      .then(function (data) {\n        self.data_ = data;\n        self.state = TileState.LOADED;\n        self.changed();\n      })\n      .catch(function (error) {\n        self.error_ = error;\n        self.state = TileState.ERROR;\n        self.changed();\n      });\n  }\n}\n\nexport default DataTile;\n","/**\n * @module ol/asserts\n */\nimport AssertionError from './AssertionError.js';\n\n/**\n * @param {*} assertion Assertion we expected to be truthy.\n * @param {number} errorCode Error code.\n */\nexport function assert(assertion, errorCode) {\n  if (!assertion) {\n    throw new AssertionError(errorCode);\n  }\n}\n","/**\n * @module ol/Feature\n */\nimport BaseObject from './Object.js';\nimport EventType from './events/EventType.js';\nimport {assert} from './asserts.js';\nimport {listen, unlistenByKey} from './events.js';\n\n/**\n * @typedef {typeof Feature|typeof import(\"./render/Feature.js\").default} FeatureClass\n */\n\n/**\n * @typedef {Feature|import(\"./render/Feature.js\").default} FeatureLike\n */\n\n/***\n * @template Return\n * @typedef {import(\"./Observable\").OnSignature<import(\"./Observable\").EventTypes, import(\"./events/Event.js\").default, Return> &\n *   import(\"./Observable\").OnSignature<import(\"./ObjectEventType\").Types|'change:geometry', import(\"./Object\").ObjectEvent, Return> &\n *   import(\"./Observable\").CombinedOnSignature<import(\"./Observable\").EventTypes|import(\"./ObjectEventType\").Types\n *     |'change:geometry', Return>} FeatureOnSignature\n */\n\n/***\n * @template Geometry\n * @typedef {Object<string, *> & { geometry?: Geometry }} ObjectWithGeometry\n */\n\n/**\n * @classdesc\n * A vector object for geographic features with a geometry and other\n * attribute properties, similar to the features in vector file formats like\n * GeoJSON.\n *\n * Features can be styled individually with `setStyle`; otherwise they use the\n * style of their vector layer.\n *\n * Note that attribute properties are set as {@link module:ol/Object~BaseObject} properties on\n * the feature object, so they are observable, and have get/set accessors.\n *\n * Typically, a feature has a single geometry property. You can set the\n * geometry using the `setGeometry` method and get it with `getGeometry`.\n * It is possible to store more than one geometry on a feature using attribute\n * properties. By default, the geometry used for rendering is identified by\n * the property name `geometry`. If you want to use another geometry property\n * for rendering, use the `setGeometryName` method to change the attribute\n * property associated with the geometry for the feature.  For example:\n *\n * ```js\n *\n * import Feature from 'ol/Feature.js';\n * import Polygon from 'ol/geom/Polygon.js';\n * import Point from 'ol/geom/Point.js';\n *\n * const feature = new Feature({\n *   geometry: new Polygon(polyCoords),\n *   labelPoint: new Point(labelCoords),\n *   name: 'My Polygon',\n * });\n *\n * // get the polygon geometry\n * const poly = feature.getGeometry();\n *\n * // Render the feature as a point using the coordinates from labelPoint\n * feature.setGeometryName('labelPoint');\n *\n * // get the point geometry\n * const point = feature.getGeometry();\n * ```\n *\n * @api\n * @template {import(\"./geom/Geometry.js\").default} [Geometry=import(\"./geom/Geometry.js\").default]\n */\nclass Feature extends BaseObject {\n  /**\n   * @param {Geometry|ObjectWithGeometry<Geometry>} [geometryOrProperties]\n   *     You may pass a Geometry object directly, or an object literal containing\n   *     properties. If you pass an object literal, you may include a Geometry\n   *     associated with a `geometry` key.\n   */\n  constructor(geometryOrProperties) {\n    super();\n\n    /***\n     * @type {FeatureOnSignature<import(\"./events\").EventsKey>}\n     */\n    this.on;\n\n    /***\n     * @type {FeatureOnSignature<import(\"./events\").EventsKey>}\n     */\n    this.once;\n\n    /***\n     * @type {FeatureOnSignature<void>}\n     */\n    this.un;\n\n    /**\n     * @private\n     * @type {number|string|undefined}\n     */\n    this.id_ = undefined;\n\n    /**\n     * @type {string}\n     * @private\n     */\n    this.geometryName_ = 'geometry';\n\n    /**\n     * User provided style.\n     * @private\n     * @type {import(\"./style/Style.js\").StyleLike}\n     */\n    this.style_ = null;\n\n    /**\n     * @private\n     * @type {import(\"./style/Style.js\").StyleFunction|undefined}\n     */\n    this.styleFunction_ = undefined;\n\n    /**\n     * @private\n     * @type {?import(\"./events.js\").EventsKey}\n     */\n    this.geometryChangeKey_ = null;\n\n    this.addChangeListener(this.geometryName_, this.handleGeometryChanged_);\n\n    if (geometryOrProperties) {\n      if (\n        typeof (\n          /** @type {?} */ (geometryOrProperties).getSimplifiedGeometry\n        ) === 'function'\n      ) {\n        const geometry = /** @type {Geometry} */ (geometryOrProperties);\n        this.setGeometry(geometry);\n      } else {\n        /** @type {Object<string, *>} */\n        const properties = geometryOrProperties;\n        this.setProperties(properties);\n      }\n    }\n  }\n\n  /**\n   * Clone this feature. If the original feature has a geometry it\n   * is also cloned. The feature id is not set in the clone.\n   * @return {Feature<Geometry>} The clone.\n   * @api\n   */\n  clone() {\n    const clone = /** @type {Feature<Geometry>} */ (\n      new Feature(this.hasProperties() ? this.getProperties() : null)\n    );\n    clone.setGeometryName(this.getGeometryName());\n    const geometry = this.getGeometry();\n    if (geometry) {\n      clone.setGeometry(/** @type {Geometry} */ (geometry.clone()));\n    }\n    const style = this.getStyle();\n    if (style) {\n      clone.setStyle(style);\n    }\n    return clone;\n  }\n\n  /**\n   * Get the feature's default geometry.  A feature may have any number of named\n   * geometries.  The \"default\" geometry (the one that is rendered by default) is\n   * set when calling {@link module:ol/Feature~Feature#setGeometry}.\n   * @return {Geometry|undefined} The default geometry for the feature.\n   * @api\n   * @observable\n   */\n  getGeometry() {\n    return /** @type {Geometry|undefined} */ (this.get(this.geometryName_));\n  }\n\n  /**\n   * Get the feature identifier.  This is a stable identifier for the feature and\n   * is either set when reading data from a remote source or set explicitly by\n   * calling {@link module:ol/Feature~Feature#setId}.\n   * @return {number|string|undefined} Id.\n   * @api\n   */\n  getId() {\n    return this.id_;\n  }\n\n  /**\n   * Get the name of the feature's default geometry.  By default, the default\n   * geometry is named `geometry`.\n   * @return {string} Get the property name associated with the default geometry\n   *     for this feature.\n   * @api\n   */\n  getGeometryName() {\n    return this.geometryName_;\n  }\n\n  /**\n   * Get the feature's style. Will return what was provided to the\n   * {@link module:ol/Feature~Feature#setStyle} method.\n   * @return {import(\"./style/Style.js\").StyleLike|undefined} The feature style.\n   * @api\n   */\n  getStyle() {\n    return this.style_;\n  }\n\n  /**\n   * Get the feature's style function.\n   * @return {import(\"./style/Style.js\").StyleFunction|undefined} Return a function\n   * representing the current style of this feature.\n   * @api\n   */\n  getStyleFunction() {\n    return this.styleFunction_;\n  }\n\n  /**\n   * @private\n   */\n  handleGeometryChange_() {\n    this.changed();\n  }\n\n  /**\n   * @private\n   */\n  handleGeometryChanged_() {\n    if (this.geometryChangeKey_) {\n      unlistenByKey(this.geometryChangeKey_);\n      this.geometryChangeKey_ = null;\n    }\n    const geometry = this.getGeometry();\n    if (geometry) {\n      this.geometryChangeKey_ = listen(\n        geometry,\n        EventType.CHANGE,\n        this.handleGeometryChange_,\n        this\n      );\n    }\n    this.changed();\n  }\n\n  /**\n   * Set the default geometry for the feature.  This will update the property\n   * with the name returned by {@link module:ol/Feature~Feature#getGeometryName}.\n   * @param {Geometry|undefined} geometry The new geometry.\n   * @api\n   * @observable\n   */\n  setGeometry(geometry) {\n    this.set(this.geometryName_, geometry);\n  }\n\n  /**\n   * Set the style for the feature to override the layer style.  This can be a\n   * single style object, an array of styles, or a function that takes a\n   * resolution and returns an array of styles. To unset the feature style, call\n   * `setStyle()` without arguments or a falsey value.\n   * @param {import(\"./style/Style.js\").StyleLike} [style] Style for this feature.\n   * @api\n   * @fires module:ol/events/Event~BaseEvent#event:change\n   */\n  setStyle(style) {\n    this.style_ = style;\n    this.styleFunction_ = !style ? undefined : createStyleFunction(style);\n    this.changed();\n  }\n\n  /**\n   * Set the feature id.  The feature id is considered stable and may be used when\n   * requesting features or comparing identifiers returned from a remote source.\n   * The feature id can be used with the\n   * {@link module:ol/source/Vector~VectorSource#getFeatureById} method.\n   * @param {number|string|undefined} id The feature id.\n   * @api\n   * @fires module:ol/events/Event~BaseEvent#event:change\n   */\n  setId(id) {\n    this.id_ = id;\n    this.changed();\n  }\n\n  /**\n   * Set the property name to be used when getting the feature's default geometry.\n   * When calling {@link module:ol/Feature~Feature#getGeometry}, the value of the property with\n   * this name will be returned.\n   * @param {string} name The property name of the default geometry.\n   * @api\n   */\n  setGeometryName(name) {\n    this.removeChangeListener(this.geometryName_, this.handleGeometryChanged_);\n    this.geometryName_ = name;\n    this.addChangeListener(this.geometryName_, this.handleGeometryChanged_);\n    this.handleGeometryChanged_();\n  }\n}\n\n/**\n * Convert the provided object into a feature style function.  Functions passed\n * through unchanged.  Arrays of Style or single style objects wrapped\n * in a new feature style function.\n * @param {!import(\"./style/Style.js\").StyleFunction|!Array<import(\"./style/Style.js\").default>|!import(\"./style/Style.js\").default} obj\n *     A feature style function, a single style, or an array of styles.\n * @return {import(\"./style/Style.js\").StyleFunction} A style function.\n */\nexport function createStyleFunction(obj) {\n  if (typeof obj === 'function') {\n    return obj;\n  }\n  /**\n   * @type {Array<import(\"./style/Style.js\").default>}\n   */\n  let styles;\n  if (Array.isArray(obj)) {\n    styles = obj;\n  } else {\n    assert(typeof (/** @type {?} */ (obj).getZIndex) === 'function', 41); // Expected an `import(\"./style/Style.js\").Style` or an array of `import(\"./style/Style.js\").Style`\n    const style = /** @type {import(\"./style/Style.js\").default} */ (obj);\n    styles = [style];\n  }\n  return function () {\n    return styles;\n  };\n}\nexport default Feature;\n","/**\n * @module ol/transform\n */\nimport {WORKER_OFFSCREEN_CANVAS} from './has.js';\nimport {assert} from './asserts.js';\n\n/**\n * An array representing an affine 2d transformation for use with\n * {@link module:ol/transform} functions. The array has 6 elements.\n * @typedef {!Array<number>} Transform\n * @api\n */\n\n/**\n * Collection of affine 2d transformation functions. The functions work on an\n * array of 6 elements. The element order is compatible with the [SVGMatrix\n * interface](https://developer.mozilla.org/en-US/docs/Web/API/SVGMatrix) and is\n * a subset (elements a to f) of a 3×3 matrix:\n * ```\n * [ a c e ]\n * [ b d f ]\n * [ 0 0 1 ]\n * ```\n */\n\n/**\n * @private\n * @type {Transform}\n */\nconst tmp_ = new Array(6);\n\n/**\n * Create an identity transform.\n * @return {!Transform} Identity transform.\n */\nexport function create() {\n  return [1, 0, 0, 1, 0, 0];\n}\n\n/**\n * Resets the given transform to an identity transform.\n * @param {!Transform} transform Transform.\n * @return {!Transform} Transform.\n */\nexport function reset(transform) {\n  return set(transform, 1, 0, 0, 1, 0, 0);\n}\n\n/**\n * Multiply the underlying matrices of two transforms and return the result in\n * the first transform.\n * @param {!Transform} transform1 Transform parameters of matrix 1.\n * @param {!Transform} transform2 Transform parameters of matrix 2.\n * @return {!Transform} transform1 multiplied with transform2.\n */\nexport function multiply(transform1, transform2) {\n  const a1 = transform1[0];\n  const b1 = transform1[1];\n  const c1 = transform1[2];\n  const d1 = transform1[3];\n  const e1 = transform1[4];\n  const f1 = transform1[5];\n  const a2 = transform2[0];\n  const b2 = transform2[1];\n  const c2 = transform2[2];\n  const d2 = transform2[3];\n  const e2 = transform2[4];\n  const f2 = transform2[5];\n\n  transform1[0] = a1 * a2 + c1 * b2;\n  transform1[1] = b1 * a2 + d1 * b2;\n  transform1[2] = a1 * c2 + c1 * d2;\n  transform1[3] = b1 * c2 + d1 * d2;\n  transform1[4] = a1 * e2 + c1 * f2 + e1;\n  transform1[5] = b1 * e2 + d1 * f2 + f1;\n\n  return transform1;\n}\n\n/**\n * Set the transform components a-f on a given transform.\n * @param {!Transform} transform Transform.\n * @param {number} a The a component of the transform.\n * @param {number} b The b component of the transform.\n * @param {number} c The c component of the transform.\n * @param {number} d The d component of the transform.\n * @param {number} e The e component of the transform.\n * @param {number} f The f component of the transform.\n * @return {!Transform} Matrix with transform applied.\n */\nexport function set(transform, a, b, c, d, e, f) {\n  transform[0] = a;\n  transform[1] = b;\n  transform[2] = c;\n  transform[3] = d;\n  transform[4] = e;\n  transform[5] = f;\n  return transform;\n}\n\n/**\n * Set transform on one matrix from another matrix.\n * @param {!Transform} transform1 Matrix to set transform to.\n * @param {!Transform} transform2 Matrix to set transform from.\n * @return {!Transform} transform1 with transform from transform2 applied.\n */\nexport function setFromArray(transform1, transform2) {\n  transform1[0] = transform2[0];\n  transform1[1] = transform2[1];\n  transform1[2] = transform2[2];\n  transform1[3] = transform2[3];\n  transform1[4] = transform2[4];\n  transform1[5] = transform2[5];\n  return transform1;\n}\n\n/**\n * Transforms the given coordinate with the given transform returning the\n * resulting, transformed coordinate. The coordinate will be modified in-place.\n *\n * @param {Transform} transform The transformation.\n * @param {import(\"./coordinate.js\").Coordinate|import(\"./pixel.js\").Pixel} coordinate The coordinate to transform.\n * @return {import(\"./coordinate.js\").Coordinate|import(\"./pixel.js\").Pixel} return coordinate so that operations can be\n *     chained together.\n */\nexport function apply(transform, coordinate) {\n  const x = coordinate[0];\n  const y = coordinate[1];\n  coordinate[0] = transform[0] * x + transform[2] * y + transform[4];\n  coordinate[1] = transform[1] * x + transform[3] * y + transform[5];\n  return coordinate;\n}\n\n/**\n * Applies rotation to the given transform.\n * @param {!Transform} transform Transform.\n * @param {number} angle Angle in radians.\n * @return {!Transform} The rotated transform.\n */\nexport function rotate(transform, angle) {\n  const cos = Math.cos(angle);\n  const sin = Math.sin(angle);\n  return multiply(transform, set(tmp_, cos, sin, -sin, cos, 0, 0));\n}\n\n/**\n * Applies scale to a given transform.\n * @param {!Transform} transform Transform.\n * @param {number} x Scale factor x.\n * @param {number} y Scale factor y.\n * @return {!Transform} The scaled transform.\n */\nexport function scale(transform, x, y) {\n  return multiply(transform, set(tmp_, x, 0, 0, y, 0, 0));\n}\n\n/**\n * Creates a scale transform.\n * @param {!Transform} target Transform to overwrite.\n * @param {number} x Scale factor x.\n * @param {number} y Scale factor y.\n * @return {!Transform} The scale transform.\n */\nexport function makeScale(target, x, y) {\n  return set(target, x, 0, 0, y, 0, 0);\n}\n\n/**\n * Applies translation to the given transform.\n * @param {!Transform} transform Transform.\n * @param {number} dx Translation x.\n * @param {number} dy Translation y.\n * @return {!Transform} The translated transform.\n */\nexport function translate(transform, dx, dy) {\n  return multiply(transform, set(tmp_, 1, 0, 0, 1, dx, dy));\n}\n\n/**\n * Creates a composite transform given an initial translation, scale, rotation, and\n * final translation (in that order only, not commutative).\n * @param {!Transform} transform The transform (will be modified in place).\n * @param {number} dx1 Initial translation x.\n * @param {number} dy1 Initial translation y.\n * @param {number} sx Scale factor x.\n * @param {number} sy Scale factor y.\n * @param {number} angle Rotation (in counter-clockwise radians).\n * @param {number} dx2 Final translation x.\n * @param {number} dy2 Final translation y.\n * @return {!Transform} The composite transform.\n */\nexport function compose(transform, dx1, dy1, sx, sy, angle, dx2, dy2) {\n  const sin = Math.sin(angle);\n  const cos = Math.cos(angle);\n  transform[0] = sx * cos;\n  transform[1] = sy * sin;\n  transform[2] = -sx * sin;\n  transform[3] = sy * cos;\n  transform[4] = dx2 * sx * cos - dy2 * sx * sin + dx1;\n  transform[5] = dx2 * sy * sin + dy2 * sy * cos + dy1;\n  return transform;\n}\n\n/**\n * Creates a composite transform given an initial translation, scale, rotation, and\n * final translation (in that order only, not commutative). The resulting transform\n * string can be applied as `transform` property of an HTMLElement's style.\n * @param {number} dx1 Initial translation x.\n * @param {number} dy1 Initial translation y.\n * @param {number} sx Scale factor x.\n * @param {number} sy Scale factor y.\n * @param {number} angle Rotation (in counter-clockwise radians).\n * @param {number} dx2 Final translation x.\n * @param {number} dy2 Final translation y.\n * @return {string} The composite css transform.\n * @api\n */\nexport function composeCssTransform(dx1, dy1, sx, sy, angle, dx2, dy2) {\n  return toString(compose(create(), dx1, dy1, sx, sy, angle, dx2, dy2));\n}\n\n/**\n * Invert the given transform.\n * @param {!Transform} source The source transform to invert.\n * @return {!Transform} The inverted (source) transform.\n */\nexport function invert(source) {\n  return makeInverse(source, source);\n}\n\n/**\n * Invert the given transform.\n * @param {!Transform} target Transform to be set as the inverse of\n *     the source transform.\n * @param {!Transform} source The source transform to invert.\n * @return {!Transform} The inverted (target) transform.\n */\nexport function makeInverse(target, source) {\n  const det = determinant(source);\n  assert(det !== 0, 32); // Transformation matrix cannot be inverted\n\n  const a = source[0];\n  const b = source[1];\n  const c = source[2];\n  const d = source[3];\n  const e = source[4];\n  const f = source[5];\n\n  target[0] = d / det;\n  target[1] = -b / det;\n  target[2] = -c / det;\n  target[3] = a / det;\n  target[4] = (c * f - d * e) / det;\n  target[5] = -(a * f - b * e) / det;\n\n  return target;\n}\n\n/**\n * Returns the determinant of the given matrix.\n * @param {!Transform} mat Matrix.\n * @return {number} Determinant.\n */\nexport function determinant(mat) {\n  return mat[0] * mat[3] - mat[1] * mat[2];\n}\n\n/**\n * @type {HTMLElement}\n * @private\n */\nlet transformStringDiv;\n\n/**\n * A rounded string version of the transform.  This can be used\n * for CSS transforms.\n * @param {!Transform} mat Matrix.\n * @return {string} The transform as a string.\n */\nexport function toString(mat) {\n  const transformString = 'matrix(' + mat.join(', ') + ')';\n  if (WORKER_OFFSCREEN_CANVAS) {\n    return transformString;\n  }\n  const node =\n    transformStringDiv || (transformStringDiv = document.createElement('div'));\n  node.style.transform = transformString;\n  return node.style.transform;\n}\n","/**\n * @module ol/extent/Relationship\n */\n\n/**\n * Relationship to an extent.\n * @enum {number}\n */\nexport default {\n  UNKNOWN: 0,\n  INTERSECTING: 1,\n  ABOVE: 2,\n  RIGHT: 4,\n  BELOW: 8,\n  LEFT: 16,\n};\n","/**\n * @module ol/extent\n */\nimport Relationship from './extent/Relationship.js';\nimport {assert} from './asserts.js';\n\n/**\n * An array of numbers representing an extent: `[minx, miny, maxx, maxy]`.\n * @typedef {Array<number>} Extent\n * @api\n */\n\n/**\n * Extent corner.\n * @typedef {'bottom-left' | 'bottom-right' | 'top-left' | 'top-right'} Corner\n */\n\n/**\n * Build an extent that includes all given coordinates.\n *\n * @param {Array<import(\"./coordinate.js\").Coordinate>} coordinates Coordinates.\n * @return {Extent} Bounding extent.\n * @api\n */\nexport function boundingExtent(coordinates) {\n  const extent = createEmpty();\n  for (let i = 0, ii = coordinates.length; i < ii; ++i) {\n    extendCoordinate(extent, coordinates[i]);\n  }\n  return extent;\n}\n\n/**\n * @param {Array<number>} xs Xs.\n * @param {Array<number>} ys Ys.\n * @param {Extent} [dest] Destination extent.\n * @private\n * @return {Extent} Extent.\n */\nfunction _boundingExtentXYs(xs, ys, dest) {\n  const minX = Math.min.apply(null, xs);\n  const minY = Math.min.apply(null, ys);\n  const maxX = Math.max.apply(null, xs);\n  const maxY = Math.max.apply(null, ys);\n  return createOrUpdate(minX, minY, maxX, maxY, dest);\n}\n\n/**\n * Return extent increased by the provided value.\n * @param {Extent} extent Extent.\n * @param {number} value The amount by which the extent should be buffered.\n * @param {Extent} [dest] Extent.\n * @return {Extent} Extent.\n * @api\n */\nexport function buffer(extent, value, dest) {\n  if (dest) {\n    dest[0] = extent[0] - value;\n    dest[1] = extent[1] - value;\n    dest[2] = extent[2] + value;\n    dest[3] = extent[3] + value;\n    return dest;\n  }\n  return [\n    extent[0] - value,\n    extent[1] - value,\n    extent[2] + value,\n    extent[3] + value,\n  ];\n}\n\n/**\n * Creates a clone of an extent.\n *\n * @param {Extent} extent Extent to clone.\n * @param {Extent} [dest] Extent.\n * @return {Extent} The clone.\n */\nexport function clone(extent, dest) {\n  if (dest) {\n    dest[0] = extent[0];\n    dest[1] = extent[1];\n    dest[2] = extent[2];\n    dest[3] = extent[3];\n    return dest;\n  }\n  return extent.slice();\n}\n\n/**\n * @param {Extent} extent Extent.\n * @param {number} x X.\n * @param {number} y Y.\n * @return {number} Closest squared distance.\n */\nexport function closestSquaredDistanceXY(extent, x, y) {\n  let dx, dy;\n  if (x < extent[0]) {\n    dx = extent[0] - x;\n  } else if (extent[2] < x) {\n    dx = x - extent[2];\n  } else {\n    dx = 0;\n  }\n  if (y < extent[1]) {\n    dy = extent[1] - y;\n  } else if (extent[3] < y) {\n    dy = y - extent[3];\n  } else {\n    dy = 0;\n  }\n  return dx * dx + dy * dy;\n}\n\n/**\n * Check if the passed coordinate is contained or on the edge of the extent.\n *\n * @param {Extent} extent Extent.\n * @param {import(\"./coordinate.js\").Coordinate} coordinate Coordinate.\n * @return {boolean} The coordinate is contained in the extent.\n * @api\n */\nexport function containsCoordinate(extent, coordinate) {\n  return containsXY(extent, coordinate[0], coordinate[1]);\n}\n\n/**\n * Check if one extent contains another.\n *\n * An extent is deemed contained if it lies completely within the other extent,\n * including if they share one or more edges.\n *\n * @param {Extent} extent1 Extent 1.\n * @param {Extent} extent2 Extent 2.\n * @return {boolean} The second extent is contained by or on the edge of the\n *     first.\n * @api\n */\nexport function containsExtent(extent1, extent2) {\n  return (\n    extent1[0] <= extent2[0] &&\n    extent2[2] <= extent1[2] &&\n    extent1[1] <= extent2[1] &&\n    extent2[3] <= extent1[3]\n  );\n}\n\n/**\n * Check if the passed coordinate is contained or on the edge of the extent.\n *\n * @param {Extent} extent Extent.\n * @param {number} x X coordinate.\n * @param {number} y Y coordinate.\n * @return {boolean} The x, y values are contained in the extent.\n * @api\n */\nexport function containsXY(extent, x, y) {\n  return extent[0] <= x && x <= extent[2] && extent[1] <= y && y <= extent[3];\n}\n\n/**\n * Get the relationship between a coordinate and extent.\n * @param {Extent} extent The extent.\n * @param {import(\"./coordinate.js\").Coordinate} coordinate The coordinate.\n * @return {import(\"./extent/Relationship.js\").default} The relationship (bitwise compare with\n *     import(\"./extent/Relationship.js\").Relationship).\n */\nexport function coordinateRelationship(extent, coordinate) {\n  const minX = extent[0];\n  const minY = extent[1];\n  const maxX = extent[2];\n  const maxY = extent[3];\n  const x = coordinate[0];\n  const y = coordinate[1];\n  let relationship = Relationship.UNKNOWN;\n  if (x < minX) {\n    relationship = relationship | Relationship.LEFT;\n  } else if (x > maxX) {\n    relationship = relationship | Relationship.RIGHT;\n  }\n  if (y < minY) {\n    relationship = relationship | Relationship.BELOW;\n  } else if (y > maxY) {\n    relationship = relationship | Relationship.ABOVE;\n  }\n  if (relationship === Relationship.UNKNOWN) {\n    relationship = Relationship.INTERSECTING;\n  }\n  return relationship;\n}\n\n/**\n * Create an empty extent.\n * @return {Extent} Empty extent.\n * @api\n */\nexport function createEmpty() {\n  return [Infinity, Infinity, -Infinity, -Infinity];\n}\n\n/**\n * Create a new extent or update the provided extent.\n * @param {number} minX Minimum X.\n * @param {number} minY Minimum Y.\n * @param {number} maxX Maximum X.\n * @param {number} maxY Maximum Y.\n * @param {Extent} [dest] Destination extent.\n * @return {Extent} Extent.\n */\nexport function createOrUpdate(minX, minY, maxX, maxY, dest) {\n  if (dest) {\n    dest[0] = minX;\n    dest[1] = minY;\n    dest[2] = maxX;\n    dest[3] = maxY;\n    return dest;\n  }\n  return [minX, minY, maxX, maxY];\n}\n\n/**\n * Create a new empty extent or make the provided one empty.\n * @param {Extent} [dest] Extent.\n * @return {Extent} Extent.\n */\nexport function createOrUpdateEmpty(dest) {\n  return createOrUpdate(Infinity, Infinity, -Infinity, -Infinity, dest);\n}\n\n/**\n * @param {import(\"./coordinate.js\").Coordinate} coordinate Coordinate.\n * @param {Extent} [dest] Extent.\n * @return {Extent} Extent.\n */\nexport function createOrUpdateFromCoordinate(coordinate, dest) {\n  const x = coordinate[0];\n  const y = coordinate[1];\n  return createOrUpdate(x, y, x, y, dest);\n}\n\n/**\n * @param {Array<import(\"./coordinate.js\").Coordinate>} coordinates Coordinates.\n * @param {Extent} [dest] Extent.\n * @return {Extent} Extent.\n */\nexport function createOrUpdateFromCoordinates(coordinates, dest) {\n  const extent = createOrUpdateEmpty(dest);\n  return extendCoordinates(extent, coordinates);\n}\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {Extent} [dest] Extent.\n * @return {Extent} Extent.\n */\nexport function createOrUpdateFromFlatCoordinates(\n  flatCoordinates,\n  offset,\n  end,\n  stride,\n  dest\n) {\n  const extent = createOrUpdateEmpty(dest);\n  return extendFlatCoordinates(extent, flatCoordinates, offset, end, stride);\n}\n\n/**\n * @param {Array<Array<import(\"./coordinate.js\").Coordinate>>} rings Rings.\n * @param {Extent} [dest] Extent.\n * @return {Extent} Extent.\n */\nexport function createOrUpdateFromRings(rings, dest) {\n  const extent = createOrUpdateEmpty(dest);\n  return extendRings(extent, rings);\n}\n\n/**\n * Determine if two extents are equivalent.\n * @param {Extent} extent1 Extent 1.\n * @param {Extent} extent2 Extent 2.\n * @return {boolean} The two extents are equivalent.\n * @api\n */\nexport function equals(extent1, extent2) {\n  return (\n    extent1[0] == extent2[0] &&\n    extent1[2] == extent2[2] &&\n    extent1[1] == extent2[1] &&\n    extent1[3] == extent2[3]\n  );\n}\n\n/**\n * Determine if two extents are approximately equivalent.\n * @param {Extent} extent1 Extent 1.\n * @param {Extent} extent2 Extent 2.\n * @param {number} tolerance Tolerance in extent coordinate units.\n * @return {boolean} The two extents differ by less than the tolerance.\n */\nexport function approximatelyEquals(extent1, extent2, tolerance) {\n  return (\n    Math.abs(extent1[0] - extent2[0]) < tolerance &&\n    Math.abs(extent1[2] - extent2[2]) < tolerance &&\n    Math.abs(extent1[1] - extent2[1]) < tolerance &&\n    Math.abs(extent1[3] - extent2[3]) < tolerance\n  );\n}\n\n/**\n * Modify an extent to include another extent.\n * @param {Extent} extent1 The extent to be modified.\n * @param {Extent} extent2 The extent that will be included in the first.\n * @return {Extent} A reference to the first (extended) extent.\n * @api\n */\nexport function extend(extent1, extent2) {\n  if (extent2[0] < extent1[0]) {\n    extent1[0] = extent2[0];\n  }\n  if (extent2[2] > extent1[2]) {\n    extent1[2] = extent2[2];\n  }\n  if (extent2[1] < extent1[1]) {\n    extent1[1] = extent2[1];\n  }\n  if (extent2[3] > extent1[3]) {\n    extent1[3] = extent2[3];\n  }\n  return extent1;\n}\n\n/**\n * @param {Extent} extent Extent.\n * @param {import(\"./coordinate.js\").Coordinate} coordinate Coordinate.\n */\nexport function extendCoordinate(extent, coordinate) {\n  if (coordinate[0] < extent[0]) {\n    extent[0] = coordinate[0];\n  }\n  if (coordinate[0] > extent[2]) {\n    extent[2] = coordinate[0];\n  }\n  if (coordinate[1] < extent[1]) {\n    extent[1] = coordinate[1];\n  }\n  if (coordinate[1] > extent[3]) {\n    extent[3] = coordinate[1];\n  }\n}\n\n/**\n * @param {Extent} extent Extent.\n * @param {Array<import(\"./coordinate.js\").Coordinate>} coordinates Coordinates.\n * @return {Extent} Extent.\n */\nexport function extendCoordinates(extent, coordinates) {\n  for (let i = 0, ii = coordinates.length; i < ii; ++i) {\n    extendCoordinate(extent, coordinates[i]);\n  }\n  return extent;\n}\n\n/**\n * @param {Extent} extent Extent.\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @return {Extent} Extent.\n */\nexport function extendFlatCoordinates(\n  extent,\n  flatCoordinates,\n  offset,\n  end,\n  stride\n) {\n  for (; offset < end; offset += stride) {\n    extendXY(extent, flatCoordinates[offset], flatCoordinates[offset + 1]);\n  }\n  return extent;\n}\n\n/**\n * @param {Extent} extent Extent.\n * @param {Array<Array<import(\"./coordinate.js\").Coordinate>>} rings Rings.\n * @return {Extent} Extent.\n */\nexport function extendRings(extent, rings) {\n  for (let i = 0, ii = rings.length; i < ii; ++i) {\n    extendCoordinates(extent, rings[i]);\n  }\n  return extent;\n}\n\n/**\n * @param {Extent} extent Extent.\n * @param {number} x X.\n * @param {number} y Y.\n */\nexport function extendXY(extent, x, y) {\n  extent[0] = Math.min(extent[0], x);\n  extent[1] = Math.min(extent[1], y);\n  extent[2] = Math.max(extent[2], x);\n  extent[3] = Math.max(extent[3], y);\n}\n\n/**\n * This function calls `callback` for each corner of the extent. If the\n * callback returns a truthy value the function returns that value\n * immediately. Otherwise the function returns `false`.\n * @param {Extent} extent Extent.\n * @param {function(import(\"./coordinate.js\").Coordinate): S} callback Callback.\n * @return {S|boolean} Value.\n * @template S\n */\nexport function forEachCorner(extent, callback) {\n  let val;\n  val = callback(getBottomLeft(extent));\n  if (val) {\n    return val;\n  }\n  val = callback(getBottomRight(extent));\n  if (val) {\n    return val;\n  }\n  val = callback(getTopRight(extent));\n  if (val) {\n    return val;\n  }\n  val = callback(getTopLeft(extent));\n  if (val) {\n    return val;\n  }\n  return false;\n}\n\n/**\n * Get the size of an extent.\n * @param {Extent} extent Extent.\n * @return {number} Area.\n * @api\n */\nexport function getArea(extent) {\n  let area = 0;\n  if (!isEmpty(extent)) {\n    area = getWidth(extent) * getHeight(extent);\n  }\n  return area;\n}\n\n/**\n * Get the bottom left coordinate of an extent.\n * @param {Extent} extent Extent.\n * @return {import(\"./coordinate.js\").Coordinate} Bottom left coordinate.\n * @api\n */\nexport function getBottomLeft(extent) {\n  return [extent[0], extent[1]];\n}\n\n/**\n * Get the bottom right coordinate of an extent.\n * @param {Extent} extent Extent.\n * @return {import(\"./coordinate.js\").Coordinate} Bottom right coordinate.\n * @api\n */\nexport function getBottomRight(extent) {\n  return [extent[2], extent[1]];\n}\n\n/**\n * Get the center coordinate of an extent.\n * @param {Extent} extent Extent.\n * @return {import(\"./coordinate.js\").Coordinate} Center.\n * @api\n */\nexport function getCenter(extent) {\n  return [(extent[0] + extent[2]) / 2, (extent[1] + extent[3]) / 2];\n}\n\n/**\n * Get a corner coordinate of an extent.\n * @param {Extent} extent Extent.\n * @param {Corner} corner Corner.\n * @return {import(\"./coordinate.js\").Coordinate} Corner coordinate.\n */\nexport function getCorner(extent, corner) {\n  let coordinate;\n  if (corner === 'bottom-left') {\n    coordinate = getBottomLeft(extent);\n  } else if (corner === 'bottom-right') {\n    coordinate = getBottomRight(extent);\n  } else if (corner === 'top-left') {\n    coordinate = getTopLeft(extent);\n  } else if (corner === 'top-right') {\n    coordinate = getTopRight(extent);\n  } else {\n    assert(false, 13); // Invalid corner\n  }\n  return coordinate;\n}\n\n/**\n * @param {Extent} extent1 Extent 1.\n * @param {Extent} extent2 Extent 2.\n * @return {number} Enlarged area.\n */\nexport function getEnlargedArea(extent1, extent2) {\n  const minX = Math.min(extent1[0], extent2[0]);\n  const minY = Math.min(extent1[1], extent2[1]);\n  const maxX = Math.max(extent1[2], extent2[2]);\n  const maxY = Math.max(extent1[3], extent2[3]);\n  return (maxX - minX) * (maxY - minY);\n}\n\n/**\n * @param {import(\"./coordinate.js\").Coordinate} center Center.\n * @param {number} resolution Resolution.\n * @param {number} rotation Rotation.\n * @param {import(\"./size.js\").Size} size Size.\n * @param {Extent} [dest] Destination extent.\n * @return {Extent} Extent.\n */\nexport function getForViewAndSize(center, resolution, rotation, size, dest) {\n  const [x0, y0, x1, y1, x2, y2, x3, y3] = getRotatedViewport(\n    center,\n    resolution,\n    rotation,\n    size\n  );\n  return createOrUpdate(\n    Math.min(x0, x1, x2, x3),\n    Math.min(y0, y1, y2, y3),\n    Math.max(x0, x1, x2, x3),\n    Math.max(y0, y1, y2, y3),\n    dest\n  );\n}\n\n/**\n * @param {import(\"./coordinate.js\").Coordinate} center Center.\n * @param {number} resolution Resolution.\n * @param {number} rotation Rotation.\n * @param {import(\"./size.js\").Size} size Size.\n * @return {Array<number>} Linear ring representing the viewport.\n */\nexport function getRotatedViewport(center, resolution, rotation, size) {\n  const dx = (resolution * size[0]) / 2;\n  const dy = (resolution * size[1]) / 2;\n  const cosRotation = Math.cos(rotation);\n  const sinRotation = Math.sin(rotation);\n  const xCos = dx * cosRotation;\n  const xSin = dx * sinRotation;\n  const yCos = dy * cosRotation;\n  const ySin = dy * sinRotation;\n  const x = center[0];\n  const y = center[1];\n  return [\n    x - xCos + ySin,\n    y - xSin - yCos,\n    x - xCos - ySin,\n    y - xSin + yCos,\n    x + xCos - ySin,\n    y + xSin + yCos,\n    x + xCos + ySin,\n    y + xSin - yCos,\n    x - xCos + ySin,\n    y - xSin - yCos,\n  ];\n}\n\n/**\n * Get the height of an extent.\n * @param {Extent} extent Extent.\n * @return {number} Height.\n * @api\n */\nexport function getHeight(extent) {\n  return extent[3] - extent[1];\n}\n\n/**\n * @param {Extent} extent1 Extent 1.\n * @param {Extent} extent2 Extent 2.\n * @return {number} Intersection area.\n */\nexport function getIntersectionArea(extent1, extent2) {\n  const intersection = getIntersection(extent1, extent2);\n  return getArea(intersection);\n}\n\n/**\n * Get the intersection of two extents.\n * @param {Extent} extent1 Extent 1.\n * @param {Extent} extent2 Extent 2.\n * @param {Extent} [dest] Optional extent to populate with intersection.\n * @return {Extent} Intersecting extent.\n * @api\n */\nexport function getIntersection(extent1, extent2, dest) {\n  const intersection = dest ? dest : createEmpty();\n  if (intersects(extent1, extent2)) {\n    if (extent1[0] > extent2[0]) {\n      intersection[0] = extent1[0];\n    } else {\n      intersection[0] = extent2[0];\n    }\n    if (extent1[1] > extent2[1]) {\n      intersection[1] = extent1[1];\n    } else {\n      intersection[1] = extent2[1];\n    }\n    if (extent1[2] < extent2[2]) {\n      intersection[2] = extent1[2];\n    } else {\n      intersection[2] = extent2[2];\n    }\n    if (extent1[3] < extent2[3]) {\n      intersection[3] = extent1[3];\n    } else {\n      intersection[3] = extent2[3];\n    }\n  } else {\n    createOrUpdateEmpty(intersection);\n  }\n  return intersection;\n}\n\n/**\n * @param {Extent} extent Extent.\n * @return {number} Margin.\n */\nexport function getMargin(extent) {\n  return getWidth(extent) + getHeight(extent);\n}\n\n/**\n * Get the size (width, height) of an extent.\n * @param {Extent} extent The extent.\n * @return {import(\"./size.js\").Size} The extent size.\n * @api\n */\nexport function getSize(extent) {\n  return [extent[2] - extent[0], extent[3] - extent[1]];\n}\n\n/**\n * Get the top left coordinate of an extent.\n * @param {Extent} extent Extent.\n * @return {import(\"./coordinate.js\").Coordinate} Top left coordinate.\n * @api\n */\nexport function getTopLeft(extent) {\n  return [extent[0], extent[3]];\n}\n\n/**\n * Get the top right coordinate of an extent.\n * @param {Extent} extent Extent.\n * @return {import(\"./coordinate.js\").Coordinate} Top right coordinate.\n * @api\n */\nexport function getTopRight(extent) {\n  return [extent[2], extent[3]];\n}\n\n/**\n * Get the width of an extent.\n * @param {Extent} extent Extent.\n * @return {number} Width.\n * @api\n */\nexport function getWidth(extent) {\n  return extent[2] - extent[0];\n}\n\n/**\n * Determine if one extent intersects another.\n * @param {Extent} extent1 Extent 1.\n * @param {Extent} extent2 Extent.\n * @return {boolean} The two extents intersect.\n * @api\n */\nexport function intersects(extent1, extent2) {\n  return (\n    extent1[0] <= extent2[2] &&\n    extent1[2] >= extent2[0] &&\n    extent1[1] <= extent2[3] &&\n    extent1[3] >= extent2[1]\n  );\n}\n\n/**\n * Determine if an extent is empty.\n * @param {Extent} extent Extent.\n * @return {boolean} Is empty.\n * @api\n */\nexport function isEmpty(extent) {\n  return extent[2] < extent[0] || extent[3] < extent[1];\n}\n\n/**\n * @param {Extent} extent Extent.\n * @param {Extent} [dest] Extent.\n * @return {Extent} Extent.\n */\nexport function returnOrUpdate(extent, dest) {\n  if (dest) {\n    dest[0] = extent[0];\n    dest[1] = extent[1];\n    dest[2] = extent[2];\n    dest[3] = extent[3];\n    return dest;\n  }\n  return extent;\n}\n\n/**\n * @param {Extent} extent Extent.\n * @param {number} value Value.\n */\nexport function scaleFromCenter(extent, value) {\n  const deltaX = ((extent[2] - extent[0]) / 2) * (value - 1);\n  const deltaY = ((extent[3] - extent[1]) / 2) * (value - 1);\n  extent[0] -= deltaX;\n  extent[2] += deltaX;\n  extent[1] -= deltaY;\n  extent[3] += deltaY;\n}\n\n/**\n * Determine if the segment between two coordinates intersects (crosses,\n * touches, or is contained by) the provided extent.\n * @param {Extent} extent The extent.\n * @param {import(\"./coordinate.js\").Coordinate} start Segment start coordinate.\n * @param {import(\"./coordinate.js\").Coordinate} end Segment end coordinate.\n * @return {boolean} The segment intersects the extent.\n */\nexport function intersectsSegment(extent, start, end) {\n  let intersects = false;\n  const startRel = coordinateRelationship(extent, start);\n  const endRel = coordinateRelationship(extent, end);\n  if (\n    startRel === Relationship.INTERSECTING ||\n    endRel === Relationship.INTERSECTING\n  ) {\n    intersects = true;\n  } else {\n    const minX = extent[0];\n    const minY = extent[1];\n    const maxX = extent[2];\n    const maxY = extent[3];\n    const startX = start[0];\n    const startY = start[1];\n    const endX = end[0];\n    const endY = end[1];\n    const slope = (endY - startY) / (endX - startX);\n    let x, y;\n    if (!!(endRel & Relationship.ABOVE) && !(startRel & Relationship.ABOVE)) {\n      // potentially intersects top\n      x = endX - (endY - maxY) / slope;\n      intersects = x >= minX && x <= maxX;\n    }\n    if (\n      !intersects &&\n      !!(endRel & Relationship.RIGHT) &&\n      !(startRel & Relationship.RIGHT)\n    ) {\n      // potentially intersects right\n      y = endY - (endX - maxX) * slope;\n      intersects = y >= minY && y <= maxY;\n    }\n    if (\n      !intersects &&\n      !!(endRel & Relationship.BELOW) &&\n      !(startRel & Relationship.BELOW)\n    ) {\n      // potentially intersects bottom\n      x = endX - (endY - minY) / slope;\n      intersects = x >= minX && x <= maxX;\n    }\n    if (\n      !intersects &&\n      !!(endRel & Relationship.LEFT) &&\n      !(startRel & Relationship.LEFT)\n    ) {\n      // potentially intersects left\n      y = endY - (endX - minX) * slope;\n      intersects = y >= minY && y <= maxY;\n    }\n  }\n  return intersects;\n}\n\n/**\n * Apply a transform function to the extent.\n * @param {Extent} extent Extent.\n * @param {import(\"./proj.js\").TransformFunction} transformFn Transform function.\n * Called with `[minX, minY, maxX, maxY]` extent coordinates.\n * @param {Extent} [dest] Destination extent.\n * @param {number} [stops] Number of stops per side used for the transform.\n * By default only the corners are used.\n * @return {Extent} Extent.\n * @api\n */\nexport function applyTransform(extent, transformFn, dest, stops) {\n  if (isEmpty(extent)) {\n    return createOrUpdateEmpty(dest);\n  }\n  let coordinates = [];\n  if (stops > 1) {\n    const width = extent[2] - extent[0];\n    const height = extent[3] - extent[1];\n    for (let i = 0; i < stops; ++i) {\n      coordinates.push(\n        extent[0] + (width * i) / stops,\n        extent[1],\n        extent[2],\n        extent[1] + (height * i) / stops,\n        extent[2] - (width * i) / stops,\n        extent[3],\n        extent[0],\n        extent[3] - (height * i) / stops\n      );\n    }\n  } else {\n    coordinates = [\n      extent[0],\n      extent[1],\n      extent[2],\n      extent[1],\n      extent[2],\n      extent[3],\n      extent[0],\n      extent[3],\n    ];\n  }\n  transformFn(coordinates, coordinates, 2);\n  const xs = [];\n  const ys = [];\n  for (let i = 0, l = coordinates.length; i < l; i += 2) {\n    xs.push(coordinates[i]);\n    ys.push(coordinates[i + 1]);\n  }\n  return _boundingExtentXYs(xs, ys, dest);\n}\n\n/**\n * Modifies the provided extent in-place to be within the real world\n * extent.\n *\n * @param {Extent} extent Extent.\n * @param {import(\"./proj/Projection.js\").default} projection Projection\n * @return {Extent} The extent within the real world extent.\n */\nexport function wrapX(extent, projection) {\n  const projectionExtent = projection.getExtent();\n  const center = getCenter(extent);\n  if (\n    projection.canWrapX() &&\n    (center[0] < projectionExtent[0] || center[0] >= projectionExtent[2])\n  ) {\n    const worldWidth = getWidth(projectionExtent);\n    const worldsAway = Math.floor(\n      (center[0] - projectionExtent[0]) / worldWidth\n    );\n    const offset = worldsAway * worldWidth;\n    extent[0] -= offset;\n    extent[2] -= offset;\n  }\n  return extent;\n}\n\n/**\n * Fits the extent to the real world\n *\n * If the extent does not cross the anti meridian, this will return the extent in an array\n * If the extent crosses the anti meridian, the extent will be sliced, so each part fits within the\n * real world\n *\n *\n * @param {Extent} extent Extent.\n * @param {import(\"./proj/Projection.js\").default} projection Projection\n * @return {Array<Extent>} The extent within the real world extent.\n */\nexport function wrapAndSliceX(extent, projection) {\n  if (projection.canWrapX()) {\n    const projectionExtent = projection.getExtent();\n\n    if (!isFinite(extent[0]) || !isFinite(extent[2])) {\n      return [[projectionExtent[0], extent[1], projectionExtent[2], extent[3]]];\n    }\n\n    wrapX(extent, projection);\n    const worldWidth = getWidth(projectionExtent);\n\n    if (getWidth(extent) > worldWidth) {\n      // the extent wraps around on itself\n      return [[projectionExtent[0], extent[1], projectionExtent[2], extent[3]]];\n    }\n    if (extent[0] < projectionExtent[0]) {\n      // the extent crosses the anti meridian, so it needs to be sliced\n      return [\n        [extent[0] + worldWidth, extent[1], projectionExtent[2], extent[3]],\n        [projectionExtent[0], extent[1], extent[2], extent[3]],\n      ];\n    }\n    if (extent[2] > projectionExtent[2]) {\n      // the extent crosses the anti meridian, so it needs to be sliced\n      return [\n        [extent[0], extent[1], projectionExtent[2], extent[3]],\n        [projectionExtent[0], extent[1], extent[2] - worldWidth, extent[3]],\n      ];\n    }\n  }\n\n  return [extent];\n}\n","/**\n * @module ol/proj/Units\n */\n\n/**\n * @typedef {'radians' | 'degrees' | 'ft' | 'm' | 'pixels' | 'tile-pixels' | 'us-ft'} Units\n * Projection units.\n */\n\n/**\n * See http://duff.ess.washington.edu/data/raster/drg/docs/geotiff.txt\n * @type {Object<number, Units>}\n */\nconst unitByCode = {\n  '9001': 'm',\n  '9002': 'ft',\n  '9003': 'us-ft',\n  '9101': 'radians',\n  '9102': 'degrees',\n};\n\n/**\n * @param {number} code Unit code.\n * @return {Units} Units.\n */\nexport function fromCode(code) {\n  return unitByCode[code];\n}\n\n/**\n * @typedef {Object} MetersPerUnitLookup\n * @property {number} radians Radians\n * @property {number} degrees Degrees\n * @property {number} ft  Feet\n * @property {number} m Meters\n * @property {number} us-ft US feet\n */\n\n/**\n * Meters per unit lookup table.\n * @const\n * @type {MetersPerUnitLookup}\n * @api\n */\nexport const METERS_PER_UNIT = {\n  // use the radius of the Normal sphere\n  'radians': 6370997 / (2 * Math.PI),\n  'degrees': (2 * Math.PI * 6370997) / 360,\n  'ft': 0.3048,\n  'm': 1,\n  'us-ft': 1200 / 3937,\n};\n","/**\n * @module ol/proj/Projection\n */\nimport {METERS_PER_UNIT} from './Units.js';\n\n/**\n * @typedef {Object} Options\n * @property {string} code The SRS identifier code, e.g. `EPSG:4326`.\n * @property {import(\"./Units.js\").Units} [units] Units. Required unless a\n * proj4 projection is defined for `code`.\n * @property {import(\"../extent.js\").Extent} [extent] The validity extent for the SRS.\n * @property {string} [axisOrientation='enu'] The axis orientation as specified in Proj4.\n * @property {boolean} [global=false] Whether the projection is valid for the whole globe.\n * @property {number} [metersPerUnit] The meters per unit for the SRS.\n * If not provided, the `units` are used to get the meters per unit from the {@link METERS_PER_UNIT}\n * lookup table.\n * @property {import(\"../extent.js\").Extent} [worldExtent] The world extent for the SRS.\n * @property {function(number, import(\"../coordinate.js\").Coordinate):number} [getPointResolution]\n * Function to determine resolution at a point. The function is called with a\n * `number` view resolution and a {@link module:ol/coordinate~Coordinate} as arguments, and returns\n * the `number` resolution in projection units at the passed coordinate. If this is `undefined`,\n * the default {@link module:ol/proj.getPointResolution} function will be used.\n */\n\n/**\n * @classdesc\n * Projection definition class. One of these is created for each projection\n * supported in the application and stored in the {@link module:ol/proj} namespace.\n * You can use these in applications, but this is not required, as API params\n * and options use {@link module:ol/proj~ProjectionLike} which means the simple string\n * code will suffice.\n *\n * You can use {@link module:ol/proj.get} to retrieve the object for a particular\n * projection.\n *\n * The library includes definitions for `EPSG:4326` and `EPSG:3857`, together\n * with the following aliases:\n * * `EPSG:4326`: CRS:84, urn:ogc:def:crs:EPSG:6.6:4326,\n *     urn:ogc:def:crs:OGC:1.3:CRS84, urn:ogc:def:crs:OGC:2:84,\n *     http://www.opengis.net/gml/srs/epsg.xml#4326,\n *     urn:x-ogc:def:crs:EPSG:4326\n * * `EPSG:3857`: EPSG:102100, EPSG:102113, EPSG:900913,\n *     urn:ogc:def:crs:EPSG:6.18:3:3857,\n *     http://www.opengis.net/gml/srs/epsg.xml#3857\n *\n * If you use [proj4js](https://github.com/proj4js/proj4js), aliases can\n * be added using `proj4.defs()`. After all required projection definitions are\n * added, call the {@link module:ol/proj/proj4.register} function.\n *\n * @api\n */\nclass Projection {\n  /**\n   * @param {Options} options Projection options.\n   */\n  constructor(options) {\n    /**\n     * @private\n     * @type {string}\n     */\n    this.code_ = options.code;\n\n    /**\n     * Units of projected coordinates. When set to `TILE_PIXELS`, a\n     * `this.extent_` and `this.worldExtent_` must be configured properly for each\n     * tile.\n     * @private\n     * @type {import(\"./Units.js\").Units}\n     */\n    this.units_ = /** @type {import(\"./Units.js\").Units} */ (options.units);\n\n    /**\n     * Validity extent of the projection in projected coordinates. For projections\n     * with `TILE_PIXELS` units, this is the extent of the tile in\n     * tile pixel space.\n     * @private\n     * @type {import(\"../extent.js\").Extent}\n     */\n    this.extent_ = options.extent !== undefined ? options.extent : null;\n\n    /**\n     * Extent of the world in EPSG:4326. For projections with\n     * `TILE_PIXELS` units, this is the extent of the tile in\n     * projected coordinate space.\n     * @private\n     * @type {import(\"../extent.js\").Extent}\n     */\n    this.worldExtent_ =\n      options.worldExtent !== undefined ? options.worldExtent : null;\n\n    /**\n     * @private\n     * @type {string}\n     */\n    this.axisOrientation_ =\n      options.axisOrientation !== undefined ? options.axisOrientation : 'enu';\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.global_ = options.global !== undefined ? options.global : false;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.canWrapX_ = !!(this.global_ && this.extent_);\n\n    /**\n     * @private\n     * @type {function(number, import(\"../coordinate.js\").Coordinate):number|undefined}\n     */\n    this.getPointResolutionFunc_ = options.getPointResolution;\n\n    /**\n     * @private\n     * @type {import(\"../tilegrid/TileGrid.js\").default}\n     */\n    this.defaultTileGrid_ = null;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.metersPerUnit_ = options.metersPerUnit;\n  }\n\n  /**\n   * @return {boolean} The projection is suitable for wrapping the x-axis\n   */\n  canWrapX() {\n    return this.canWrapX_;\n  }\n\n  /**\n   * Get the code for this projection, e.g. 'EPSG:4326'.\n   * @return {string} Code.\n   * @api\n   */\n  getCode() {\n    return this.code_;\n  }\n\n  /**\n   * Get the validity extent for this projection.\n   * @return {import(\"../extent.js\").Extent} Extent.\n   * @api\n   */\n  getExtent() {\n    return this.extent_;\n  }\n\n  /**\n   * Get the units of this projection.\n   * @return {import(\"./Units.js\").Units} Units.\n   * @api\n   */\n  getUnits() {\n    return this.units_;\n  }\n\n  /**\n   * Get the amount of meters per unit of this projection.  If the projection is\n   * not configured with `metersPerUnit` or a units identifier, the return is\n   * `undefined`.\n   * @return {number|undefined} Meters.\n   * @api\n   */\n  getMetersPerUnit() {\n    return this.metersPerUnit_ || METERS_PER_UNIT[this.units_];\n  }\n\n  /**\n   * Get the world extent for this projection.\n   * @return {import(\"../extent.js\").Extent} Extent.\n   * @api\n   */\n  getWorldExtent() {\n    return this.worldExtent_;\n  }\n\n  /**\n   * Get the axis orientation of this projection.\n   * Example values are:\n   * enu - the default easting, northing, elevation.\n   * neu - northing, easting, up - useful for \"lat/long\" geographic coordinates,\n   *     or south orientated transverse mercator.\n   * wnu - westing, northing, up - some planetary coordinate systems have\n   *     \"west positive\" coordinate systems\n   * @return {string} Axis orientation.\n   * @api\n   */\n  getAxisOrientation() {\n    return this.axisOrientation_;\n  }\n\n  /**\n   * Is this projection a global projection which spans the whole world?\n   * @return {boolean} Whether the projection is global.\n   * @api\n   */\n  isGlobal() {\n    return this.global_;\n  }\n\n  /**\n   * Set if the projection is a global projection which spans the whole world\n   * @param {boolean} global Whether the projection is global.\n   * @api\n   */\n  setGlobal(global) {\n    this.global_ = global;\n    this.canWrapX_ = !!(global && this.extent_);\n  }\n\n  /**\n   * @return {import(\"../tilegrid/TileGrid.js\").default} The default tile grid.\n   */\n  getDefaultTileGrid() {\n    return this.defaultTileGrid_;\n  }\n\n  /**\n   * @param {import(\"../tilegrid/TileGrid.js\").default} tileGrid The default tile grid.\n   */\n  setDefaultTileGrid(tileGrid) {\n    this.defaultTileGrid_ = tileGrid;\n  }\n\n  /**\n   * Set the validity extent for this projection.\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @api\n   */\n  setExtent(extent) {\n    this.extent_ = extent;\n    this.canWrapX_ = !!(this.global_ && extent);\n  }\n\n  /**\n   * Set the world extent for this projection.\n   * @param {import(\"../extent.js\").Extent} worldExtent World extent\n   *     [minlon, minlat, maxlon, maxlat].\n   * @api\n   */\n  setWorldExtent(worldExtent) {\n    this.worldExtent_ = worldExtent;\n  }\n\n  /**\n   * Set the getPointResolution function (see {@link module:ol/proj.getPointResolution}\n   * for this projection.\n   * @param {function(number, import(\"../coordinate.js\").Coordinate):number} func Function\n   * @api\n   */\n  setGetPointResolution(func) {\n    this.getPointResolutionFunc_ = func;\n  }\n\n  /**\n   * Get the custom point resolution function for this projection (if set).\n   * @return {function(number, import(\"../coordinate.js\").Coordinate):number|undefined} The custom point\n   * resolution function (if set).\n   */\n  getPointResolutionFunc() {\n    return this.getPointResolutionFunc_;\n  }\n}\n\nexport default Projection;\n","/**\n * @module ol/proj/epsg3857\n */\nimport Projection from './Projection.js';\n\n/**\n * Radius of WGS84 sphere\n *\n * @const\n * @type {number}\n */\nexport const RADIUS = 6378137;\n\n/**\n * @const\n * @type {number}\n */\nexport const HALF_SIZE = Math.PI * RADIUS;\n\n/**\n * @const\n * @type {import(\"../extent.js\").Extent}\n */\nexport const EXTENT = [-HALF_SIZE, -HALF_SIZE, HALF_SIZE, HALF_SIZE];\n\n/**\n * @const\n * @type {import(\"../extent.js\").Extent}\n */\nexport const WORLD_EXTENT = [-180, -85, 180, 85];\n\n/**\n * Maximum safe value in y direction\n * @const\n * @type {number}\n */\nexport const MAX_SAFE_Y = RADIUS * Math.log(Math.tan(Math.PI / 2));\n\n/**\n * @classdesc\n * Projection object for web/spherical Mercator (EPSG:3857).\n */\nclass EPSG3857Projection extends Projection {\n  /**\n   * @param {string} code Code.\n   */\n  constructor(code) {\n    super({\n      code: code,\n      units: 'm',\n      extent: EXTENT,\n      global: true,\n      worldExtent: WORLD_EXTENT,\n      getPointResolution: function (resolution, point) {\n        return resolution / Math.cosh(point[1] / RADIUS);\n      },\n    });\n  }\n}\n\n/**\n * Projections equal to EPSG:3857.\n *\n * @const\n * @type {Array<import(\"./Projection.js\").default>}\n */\nexport const PROJECTIONS = [\n  new EPSG3857Projection('EPSG:3857'),\n  new EPSG3857Projection('EPSG:102100'),\n  new EPSG3857Projection('EPSG:102113'),\n  new EPSG3857Projection('EPSG:900913'),\n  new EPSG3857Projection('http://www.opengis.net/def/crs/EPSG/0/3857'),\n  new EPSG3857Projection('http://www.opengis.net/gml/srs/epsg.xml#3857'),\n];\n\n/**\n * Transformation from EPSG:4326 to EPSG:3857.\n *\n * @param {Array<number>} input Input array of coordinate values.\n * @param {Array<number>} [output] Output array of coordinate values.\n * @param {number} [dimension] Dimension (default is `2`).\n * @return {Array<number>} Output array of coordinate values.\n */\nexport function fromEPSG4326(input, output, dimension) {\n  const length = input.length;\n  dimension = dimension > 1 ? dimension : 2;\n  if (output === undefined) {\n    if (dimension > 2) {\n      // preserve values beyond second dimension\n      output = input.slice();\n    } else {\n      output = new Array(length);\n    }\n  }\n  for (let i = 0; i < length; i += dimension) {\n    output[i] = (HALF_SIZE * input[i]) / 180;\n    let y = RADIUS * Math.log(Math.tan((Math.PI * (+input[i + 1] + 90)) / 360));\n    if (y > MAX_SAFE_Y) {\n      y = MAX_SAFE_Y;\n    } else if (y < -MAX_SAFE_Y) {\n      y = -MAX_SAFE_Y;\n    }\n    output[i + 1] = y;\n  }\n  return output;\n}\n\n/**\n * Transformation from EPSG:3857 to EPSG:4326.\n *\n * @param {Array<number>} input Input array of coordinate values.\n * @param {Array<number>} [output] Output array of coordinate values.\n * @param {number} [dimension] Dimension (default is `2`).\n * @return {Array<number>} Output array of coordinate values.\n */\nexport function toEPSG4326(input, output, dimension) {\n  const length = input.length;\n  dimension = dimension > 1 ? dimension : 2;\n  if (output === undefined) {\n    if (dimension > 2) {\n      // preserve values beyond second dimension\n      output = input.slice();\n    } else {\n      output = new Array(length);\n    }\n  }\n  for (let i = 0; i < length; i += dimension) {\n    output[i] = (180 * input[i]) / HALF_SIZE;\n    output[i + 1] =\n      (360 * Math.atan(Math.exp(input[i + 1] / RADIUS))) / Math.PI - 90;\n  }\n  return output;\n}\n","/**\n * @module ol/proj/epsg4326\n */\nimport Projection from './Projection.js';\n\n/**\n * Semi-major radius of the WGS84 ellipsoid.\n *\n * @const\n * @type {number}\n */\nexport const RADIUS = 6378137;\n\n/**\n * Extent of the EPSG:4326 projection which is the whole world.\n *\n * @const\n * @type {import(\"../extent.js\").Extent}\n */\nexport const EXTENT = [-180, -90, 180, 90];\n\n/**\n * @const\n * @type {number}\n */\nexport const METERS_PER_UNIT = (Math.PI * RADIUS) / 180;\n\n/**\n * @classdesc\n * Projection object for WGS84 geographic coordinates (EPSG:4326).\n *\n * Note that OpenLayers does not strictly comply with the EPSG definition.\n * The EPSG registry defines 4326 as a CRS for Latitude,Longitude (y,x).\n * OpenLayers treats EPSG:4326 as a pseudo-projection, with x,y coordinates.\n */\nclass EPSG4326Projection extends Projection {\n  /**\n   * @param {string} code Code.\n   * @param {string} [axisOrientation] Axis orientation.\n   */\n  constructor(code, axisOrientation) {\n    super({\n      code: code,\n      units: 'degrees',\n      extent: EXTENT,\n      axisOrientation: axisOrientation,\n      global: true,\n      metersPerUnit: METERS_PER_UNIT,\n      worldExtent: EXTENT,\n    });\n  }\n}\n\n/**\n * Projections equal to EPSG:4326.\n *\n * @const\n * @type {Array<import(\"./Projection.js\").default>}\n */\nexport const PROJECTIONS = [\n  new EPSG4326Projection('CRS:84'),\n  new EPSG4326Projection('EPSG:4326', 'neu'),\n  new EPSG4326Projection('urn:ogc:def:crs:OGC:1.3:CRS84'),\n  new EPSG4326Projection('urn:ogc:def:crs:OGC:2:84'),\n  new EPSG4326Projection('http://www.opengis.net/def/crs/OGC/1.3/CRS84'),\n  new EPSG4326Projection('http://www.opengis.net/gml/srs/epsg.xml#4326', 'neu'),\n  new EPSG4326Projection('http://www.opengis.net/def/crs/EPSG/0/4326', 'neu'),\n];\n","/**\n * @module ol/proj/projections\n */\n\n/**\n * @type {Object<string, import(\"./Projection.js\").default>}\n */\nlet cache = {};\n\n/**\n * Clear the projections cache.\n */\nexport function clear() {\n  cache = {};\n}\n\n/**\n * Get a cached projection by code.\n * @param {string} code The code for the projection.\n * @return {import(\"./Projection.js\").default} The projection (if cached).\n */\nexport function get(code) {\n  return (\n    cache[code] ||\n    cache[code.replace(/urn:(x-)?ogc:def:crs:EPSG:(.*:)?(\\w+)$/, 'EPSG:$3')] ||\n    null\n  );\n}\n\n/**\n * Add a projection to the cache.\n * @param {string} code The projection code.\n * @param {import(\"./Projection.js\").default} projection The projection to cache.\n */\nexport function add(code, projection) {\n  cache[code] = projection;\n}\n","/**\n * @module ol/proj/transforms\n */\nimport {isEmpty} from '../obj.js';\n\n/**\n * @private\n * @type {!Object<string, Object<string, import(\"../proj.js\").TransformFunction>>}\n */\nlet transforms = {};\n\n/**\n * Clear the transform cache.\n */\nexport function clear() {\n  transforms = {};\n}\n\n/**\n * Registers a conversion function to convert coordinates from the source\n * projection to the destination projection.\n *\n * @param {import(\"./Projection.js\").default} source Source.\n * @param {import(\"./Projection.js\").default} destination Destination.\n * @param {import(\"../proj.js\").TransformFunction} transformFn Transform.\n */\nexport function add(source, destination, transformFn) {\n  const sourceCode = source.getCode();\n  const destinationCode = destination.getCode();\n  if (!(sourceCode in transforms)) {\n    transforms[sourceCode] = {};\n  }\n  transforms[sourceCode][destinationCode] = transformFn;\n}\n\n/**\n * Unregisters the conversion function to convert coordinates from the source\n * projection to the destination projection.  This method is used to clean up\n * cached transforms during testing.\n *\n * @param {import(\"./Projection.js\").default} source Source projection.\n * @param {import(\"./Projection.js\").default} destination Destination projection.\n * @return {import(\"../proj.js\").TransformFunction} transformFn The unregistered transform.\n */\nexport function remove(source, destination) {\n  const sourceCode = source.getCode();\n  const destinationCode = destination.getCode();\n  const transform = transforms[sourceCode][destinationCode];\n  delete transforms[sourceCode][destinationCode];\n  if (isEmpty(transforms[sourceCode])) {\n    delete transforms[sourceCode];\n  }\n  return transform;\n}\n\n/**\n * Get a transform given a source code and a destination code.\n * @param {string} sourceCode The code for the source projection.\n * @param {string} destinationCode The code for the destination projection.\n * @return {import(\"../proj.js\").TransformFunction|undefined} The transform function (if found).\n */\nexport function get(sourceCode, destinationCode) {\n  let transform;\n  if (sourceCode in transforms && destinationCode in transforms[sourceCode]) {\n    transform = transforms[sourceCode][destinationCode];\n  }\n  return transform;\n}\n","/**\n * @module ol/math\n */\n\n/**\n * Takes a number and clamps it to within the provided bounds.\n * @param {number} value The input number.\n * @param {number} min The minimum value to return.\n * @param {number} max The maximum value to return.\n * @return {number} The input number if it is within bounds, or the nearest\n *     number within the bounds.\n */\nexport function clamp(value, min, max) {\n  return Math.min(Math.max(value, min), max);\n}\n\n/**\n * Returns the square of the closest distance between the point (x, y) and the\n * line segment (x1, y1) to (x2, y2).\n * @param {number} x X.\n * @param {number} y Y.\n * @param {number} x1 X1.\n * @param {number} y1 Y1.\n * @param {number} x2 X2.\n * @param {number} y2 Y2.\n * @return {number} Squared distance.\n */\nexport function squaredSegmentDistance(x, y, x1, y1, x2, y2) {\n  const dx = x2 - x1;\n  const dy = y2 - y1;\n  if (dx !== 0 || dy !== 0) {\n    const t = ((x - x1) * dx + (y - y1) * dy) / (dx * dx + dy * dy);\n    if (t > 1) {\n      x1 = x2;\n      y1 = y2;\n    } else if (t > 0) {\n      x1 += dx * t;\n      y1 += dy * t;\n    }\n  }\n  return squaredDistance(x, y, x1, y1);\n}\n\n/**\n * Returns the square of the distance between the points (x1, y1) and (x2, y2).\n * @param {number} x1 X1.\n * @param {number} y1 Y1.\n * @param {number} x2 X2.\n * @param {number} y2 Y2.\n * @return {number} Squared distance.\n */\nexport function squaredDistance(x1, y1, x2, y2) {\n  const dx = x2 - x1;\n  const dy = y2 - y1;\n  return dx * dx + dy * dy;\n}\n\n/**\n * Solves system of linear equations using Gaussian elimination method.\n *\n * @param {Array<Array<number>>} mat Augmented matrix (n x n + 1 column)\n *                                     in row-major order.\n * @return {Array<number>} The resulting vector.\n */\nexport function solveLinearSystem(mat) {\n  const n = mat.length;\n\n  for (let i = 0; i < n; i++) {\n    // Find max in the i-th column (ignoring i - 1 first rows)\n    let maxRow = i;\n    let maxEl = Math.abs(mat[i][i]);\n    for (let r = i + 1; r < n; r++) {\n      const absValue = Math.abs(mat[r][i]);\n      if (absValue > maxEl) {\n        maxEl = absValue;\n        maxRow = r;\n      }\n    }\n\n    if (maxEl === 0) {\n      return null; // matrix is singular\n    }\n\n    // Swap max row with i-th (current) row\n    const tmp = mat[maxRow];\n    mat[maxRow] = mat[i];\n    mat[i] = tmp;\n\n    // Subtract the i-th row to make all the remaining rows 0 in the i-th column\n    for (let j = i + 1; j < n; j++) {\n      const coef = -mat[j][i] / mat[i][i];\n      for (let k = i; k < n + 1; k++) {\n        if (i == k) {\n          mat[j][k] = 0;\n        } else {\n          mat[j][k] += coef * mat[i][k];\n        }\n      }\n    }\n  }\n\n  // Solve Ax=b for upper triangular matrix A (mat)\n  const x = new Array(n);\n  for (let l = n - 1; l >= 0; l--) {\n    x[l] = mat[l][n] / mat[l][l];\n    for (let m = l - 1; m >= 0; m--) {\n      mat[m][n] -= mat[m][l] * x[l];\n    }\n  }\n  return x;\n}\n\n/**\n * Converts radians to to degrees.\n *\n * @param {number} angleInRadians Angle in radians.\n * @return {number} Angle in degrees.\n */\nexport function toDegrees(angleInRadians) {\n  return (angleInRadians * 180) / Math.PI;\n}\n\n/**\n * Converts degrees to radians.\n *\n * @param {number} angleInDegrees Angle in degrees.\n * @return {number} Angle in radians.\n */\nexport function toRadians(angleInDegrees) {\n  return (angleInDegrees * Math.PI) / 180;\n}\n\n/**\n * Returns the modulo of a / b, depending on the sign of b.\n *\n * @param {number} a Dividend.\n * @param {number} b Divisor.\n * @return {number} Modulo.\n */\nexport function modulo(a, b) {\n  const r = a % b;\n  return r * b < 0 ? r + b : r;\n}\n\n/**\n * Calculates the linearly interpolated value of x between a and b.\n *\n * @param {number} a Number\n * @param {number} b Number\n * @param {number} x Value to be interpolated.\n * @return {number} Interpolated value.\n */\nexport function lerp(a, b, x) {\n  return a + x * (b - a);\n}\n\n/**\n * Returns a number with a limited number of decimal digits.\n * @param {number} n The input number.\n * @param {number} decimals The maximum number of decimal digits.\n * @return {number} The input number with a limited number of decimal digits.\n */\nexport function toFixed(n, decimals) {\n  const factor = Math.pow(10, decimals);\n  return Math.round(n * factor) / factor;\n}\n\n/**\n * Rounds a number to the nearest integer value considering only the given number\n * of decimal digits (with rounding on the final digit).\n * @param {number} n The input number.\n * @param {number} decimals The maximum number of decimal digits.\n * @return {number} The nearest integer.\n */\nexport function round(n, decimals) {\n  return Math.round(toFixed(n, decimals));\n}\n\n/**\n * Rounds a number to the next smaller integer considering only the given number\n * of decimal digits (with rounding on the final digit).\n * @param {number} n The input number.\n * @param {number} decimals The maximum number of decimal digits.\n * @return {number} The next smaller integer.\n */\nexport function floor(n, decimals) {\n  return Math.floor(toFixed(n, decimals));\n}\n\n/**\n * Rounds a number to the next bigger integer considering only the given number\n * of decimal digits (with rounding on the final digit).\n * @param {number} n The input number.\n * @param {number} decimals The maximum number of decimal digits.\n * @return {number} The next bigger integer.\n */\nexport function ceil(n, decimals) {\n  return Math.ceil(toFixed(n, decimals));\n}\n","/**\n * @module ol/string\n */\n\n/**\n * @param {number} number Number to be formatted\n * @param {number} width The desired width\n * @param {number} [precision] Precision of the output string (i.e. number of decimal places)\n * @return {string} Formatted string\n */\nexport function padNumber(number, width, precision) {\n  const numberString =\n    precision !== undefined ? number.toFixed(precision) : '' + number;\n  let decimal = numberString.indexOf('.');\n  decimal = decimal === -1 ? numberString.length : decimal;\n  return decimal > width\n    ? numberString\n    : new Array(1 + width - decimal).join('0') + numberString;\n}\n\n/**\n * Adapted from https://github.com/omichelsen/compare-versions/blob/master/index.js\n * @param {string|number} v1 First version\n * @param {string|number} v2 Second version\n * @return {number} Value\n */\nexport function compareVersions(v1, v2) {\n  const s1 = ('' + v1).split('.');\n  const s2 = ('' + v2).split('.');\n\n  for (let i = 0; i < Math.max(s1.length, s2.length); i++) {\n    const n1 = parseInt(s1[i] || '0', 10);\n    const n2 = parseInt(s2[i] || '0', 10);\n\n    if (n1 > n2) {\n      return 1;\n    }\n    if (n2 > n1) {\n      return -1;\n    }\n  }\n\n  return 0;\n}\n","/**\n * @module ol/coordinate\n */\nimport {getWidth} from './extent.js';\nimport {modulo, toFixed} from './math.js';\nimport {padNumber} from './string.js';\n\n/**\n * An array of numbers representing an xy coordinate. Example: `[16, 48]`.\n * @typedef {Array<number>} Coordinate\n * @api\n */\n\n/**\n * A function that takes a {@link module:ol/coordinate~Coordinate} and\n * transforms it into a `{string}`.\n *\n * @typedef {function((Coordinate|undefined)): string} CoordinateFormat\n * @api\n */\n\n/**\n * Add `delta` to `coordinate`. `coordinate` is modified in place and returned\n * by the function.\n *\n * Example:\n *\n *     import {add} from 'ol/coordinate.js';\n *\n *     const coord = [7.85, 47.983333];\n *     add(coord, [-2, 4]);\n *     // coord is now [5.85, 51.983333]\n *\n * @param {Coordinate} coordinate Coordinate.\n * @param {Coordinate} delta Delta.\n * @return {Coordinate} The input coordinate adjusted by\n * the given delta.\n * @api\n */\nexport function add(coordinate, delta) {\n  coordinate[0] += +delta[0];\n  coordinate[1] += +delta[1];\n  return coordinate;\n}\n\n/**\n * Calculates the point closest to the passed coordinate on the passed circle.\n *\n * @param {Coordinate} coordinate The coordinate.\n * @param {import(\"./geom/Circle.js\").default} circle The circle.\n * @return {Coordinate} Closest point on the circumference.\n */\nexport function closestOnCircle(coordinate, circle) {\n  const r = circle.getRadius();\n  const center = circle.getCenter();\n  const x0 = center[0];\n  const y0 = center[1];\n  const x1 = coordinate[0];\n  const y1 = coordinate[1];\n\n  let dx = x1 - x0;\n  const dy = y1 - y0;\n  if (dx === 0 && dy === 0) {\n    dx = 1;\n  }\n  const d = Math.sqrt(dx * dx + dy * dy);\n\n  const x = x0 + (r * dx) / d;\n  const y = y0 + (r * dy) / d;\n\n  return [x, y];\n}\n\n/**\n * Calculates the point closest to the passed coordinate on the passed segment.\n * This is the foot of the perpendicular of the coordinate to the segment when\n * the foot is on the segment, or the closest segment coordinate when the foot\n * is outside the segment.\n *\n * @param {Coordinate} coordinate The coordinate.\n * @param {Array<Coordinate>} segment The two coordinates\n * of the segment.\n * @return {Coordinate} The foot of the perpendicular of\n * the coordinate to the segment.\n */\nexport function closestOnSegment(coordinate, segment) {\n  const x0 = coordinate[0];\n  const y0 = coordinate[1];\n  const start = segment[0];\n  const end = segment[1];\n  const x1 = start[0];\n  const y1 = start[1];\n  const x2 = end[0];\n  const y2 = end[1];\n  const dx = x2 - x1;\n  const dy = y2 - y1;\n  const along =\n    dx === 0 && dy === 0\n      ? 0\n      : (dx * (x0 - x1) + dy * (y0 - y1)) / (dx * dx + dy * dy || 0);\n  let x, y;\n  if (along <= 0) {\n    x = x1;\n    y = y1;\n  } else if (along >= 1) {\n    x = x2;\n    y = y2;\n  } else {\n    x = x1 + along * dx;\n    y = y1 + along * dy;\n  }\n  return [x, y];\n}\n\n/**\n * Returns a {@link module:ol/coordinate~CoordinateFormat} function that can be\n * used to format\n * a {Coordinate} to a string.\n *\n * Example without specifying the fractional digits:\n *\n *     import {createStringXY} from 'ol/coordinate.js';\n *\n *     const coord = [7.85, 47.983333];\n *     const stringifyFunc = createStringXY();\n *     const out = stringifyFunc(coord);\n *     // out is now '8, 48'\n *\n * Example with explicitly specifying 2 fractional digits:\n *\n *     import {createStringXY} from 'ol/coordinate.js';\n *\n *     const coord = [7.85, 47.983333];\n *     const stringifyFunc = createStringXY(2);\n *     const out = stringifyFunc(coord);\n *     // out is now '7.85, 47.98'\n *\n * @param {number} [fractionDigits] The number of digits to include\n *    after the decimal point. Default is `0`.\n * @return {CoordinateFormat} Coordinate format.\n * @api\n */\nexport function createStringXY(fractionDigits) {\n  return (\n    /**\n     * @param {Coordinate} coordinate Coordinate.\n     * @return {string} String XY.\n     */\n    function (coordinate) {\n      return toStringXY(coordinate, fractionDigits);\n    }\n  );\n}\n\n/**\n * @param {string} hemispheres Hemispheres.\n * @param {number} degrees Degrees.\n * @param {number} [fractionDigits] The number of digits to include\n *    after the decimal point. Default is `0`.\n * @return {string} String.\n */\nexport function degreesToStringHDMS(hemispheres, degrees, fractionDigits) {\n  const normalizedDegrees = modulo(degrees + 180, 360) - 180;\n  const x = Math.abs(3600 * normalizedDegrees);\n  const decimals = fractionDigits || 0;\n\n  let deg = Math.floor(x / 3600);\n  let min = Math.floor((x - deg * 3600) / 60);\n  let sec = toFixed(x - deg * 3600 - min * 60, decimals);\n\n  if (sec >= 60) {\n    sec = 0;\n    min += 1;\n  }\n\n  if (min >= 60) {\n    min = 0;\n    deg += 1;\n  }\n\n  let hdms = deg + '\\u00b0';\n  if (min !== 0 || sec !== 0) {\n    hdms += ' ' + padNumber(min, 2) + '\\u2032';\n  }\n  if (sec !== 0) {\n    hdms += ' ' + padNumber(sec, 2, decimals) + '\\u2033';\n  }\n  if (normalizedDegrees !== 0) {\n    hdms += ' ' + hemispheres.charAt(normalizedDegrees < 0 ? 1 : 0);\n  }\n\n  return hdms;\n}\n\n/**\n * Transforms the given {@link module:ol/coordinate~Coordinate} to a string\n * using the given string template. The strings `{x}` and `{y}` in the template\n * will be replaced with the first and second coordinate values respectively.\n *\n * Example without specifying the fractional digits:\n *\n *     import {format} from 'ol/coordinate.js';\n *\n *     const coord = [7.85, 47.983333];\n *     const template = 'Coordinate is ({x}|{y}).';\n *     const out = format(coord, template);\n *     // out is now 'Coordinate is (8|48).'\n *\n * Example explicitly specifying the fractional digits:\n *\n *     import {format} from 'ol/coordinate.js';\n *\n *     const coord = [7.85, 47.983333];\n *     const template = 'Coordinate is ({x}|{y}).';\n *     const out = format(coord, template, 2);\n *     // out is now 'Coordinate is (7.85|47.98).'\n *\n * @param {Coordinate} coordinate Coordinate.\n * @param {string} template A template string with `{x}` and `{y}` placeholders\n *     that will be replaced by first and second coordinate values.\n * @param {number} [fractionDigits] The number of digits to include\n *    after the decimal point. Default is `0`.\n * @return {string} Formatted coordinate.\n * @api\n */\nexport function format(coordinate, template, fractionDigits) {\n  if (coordinate) {\n    return template\n      .replace('{x}', coordinate[0].toFixed(fractionDigits))\n      .replace('{y}', coordinate[1].toFixed(fractionDigits));\n  }\n  return '';\n}\n\n/**\n * @param {Coordinate} coordinate1 First coordinate.\n * @param {Coordinate} coordinate2 Second coordinate.\n * @return {boolean} The two coordinates are equal.\n */\nexport function equals(coordinate1, coordinate2) {\n  let equals = true;\n  for (let i = coordinate1.length - 1; i >= 0; --i) {\n    if (coordinate1[i] != coordinate2[i]) {\n      equals = false;\n      break;\n    }\n  }\n  return equals;\n}\n\n/**\n * Rotate `coordinate` by `angle`. `coordinate` is modified in place and\n * returned by the function.\n *\n * Example:\n *\n *     import {rotate} from 'ol/coordinate.js';\n *\n *     const coord = [7.85, 47.983333];\n *     const rotateRadians = Math.PI / 2; // 90 degrees\n *     rotate(coord, rotateRadians);\n *     // coord is now [-47.983333, 7.85]\n *\n * @param {Coordinate} coordinate Coordinate.\n * @param {number} angle Angle in radian.\n * @return {Coordinate} Coordinate.\n * @api\n */\nexport function rotate(coordinate, angle) {\n  const cosAngle = Math.cos(angle);\n  const sinAngle = Math.sin(angle);\n  const x = coordinate[0] * cosAngle - coordinate[1] * sinAngle;\n  const y = coordinate[1] * cosAngle + coordinate[0] * sinAngle;\n  coordinate[0] = x;\n  coordinate[1] = y;\n  return coordinate;\n}\n\n/**\n * Scale `coordinate` by `scale`. `coordinate` is modified in place and returned\n * by the function.\n *\n * Example:\n *\n *     import {scale as scaleCoordinate} from 'ol/coordinate.js';\n *\n *     const coord = [7.85, 47.983333];\n *     const scale = 1.2;\n *     scaleCoordinate(coord, scale);\n *     // coord is now [9.42, 57.5799996]\n *\n * @param {Coordinate} coordinate Coordinate.\n * @param {number} scale Scale factor.\n * @return {Coordinate} Coordinate.\n */\nexport function scale(coordinate, scale) {\n  coordinate[0] *= scale;\n  coordinate[1] *= scale;\n  return coordinate;\n}\n\n/**\n * @param {Coordinate} coord1 First coordinate.\n * @param {Coordinate} coord2 Second coordinate.\n * @return {number} Squared distance between coord1 and coord2.\n */\nexport function squaredDistance(coord1, coord2) {\n  const dx = coord1[0] - coord2[0];\n  const dy = coord1[1] - coord2[1];\n  return dx * dx + dy * dy;\n}\n\n/**\n * @param {Coordinate} coord1 First coordinate.\n * @param {Coordinate} coord2 Second coordinate.\n * @return {number} Distance between coord1 and coord2.\n */\nexport function distance(coord1, coord2) {\n  return Math.sqrt(squaredDistance(coord1, coord2));\n}\n\n/**\n * Calculate the squared distance from a coordinate to a line segment.\n *\n * @param {Coordinate} coordinate Coordinate of the point.\n * @param {Array<Coordinate>} segment Line segment (2\n * coordinates).\n * @return {number} Squared distance from the point to the line segment.\n */\nexport function squaredDistanceToSegment(coordinate, segment) {\n  return squaredDistance(coordinate, closestOnSegment(coordinate, segment));\n}\n\n/**\n * Format a geographic coordinate with the hemisphere, degrees, minutes, and\n * seconds.\n *\n * Example without specifying fractional digits:\n *\n *     import {toStringHDMS} from 'ol/coordinate.js';\n *\n *     const coord = [7.85, 47.983333];\n *     const out = toStringHDMS(coord);\n *     // out is now '47° 58′ 60″ N 7° 50′ 60″ E'\n *\n * Example explicitly specifying 1 fractional digit:\n *\n *     import {toStringHDMS} from 'ol/coordinate.js';\n *\n *     const coord = [7.85, 47.983333];\n *     const out = toStringHDMS(coord, 1);\n *     // out is now '47° 58′ 60.0″ N 7° 50′ 60.0″ E'\n *\n * @param {Coordinate} coordinate Coordinate.\n * @param {number} [fractionDigits] The number of digits to include\n *    after the decimal point. Default is `0`.\n * @return {string} Hemisphere, degrees, minutes and seconds.\n * @api\n */\nexport function toStringHDMS(coordinate, fractionDigits) {\n  if (coordinate) {\n    return (\n      degreesToStringHDMS('NS', coordinate[1], fractionDigits) +\n      ' ' +\n      degreesToStringHDMS('EW', coordinate[0], fractionDigits)\n    );\n  }\n  return '';\n}\n\n/**\n * Format a coordinate as a comma delimited string.\n *\n * Example without specifying fractional digits:\n *\n *     import {toStringXY} from 'ol/coordinate.js';\n *\n *     const coord = [7.85, 47.983333];\n *     const out = toStringXY(coord);\n *     // out is now '8, 48'\n *\n * Example explicitly specifying 1 fractional digit:\n *\n *     import {toStringXY} from 'ol/coordinate.js';\n *\n *     const coord = [7.85, 47.983333];\n *     const out = toStringXY(coord, 1);\n *     // out is now '7.8, 48.0'\n *\n * @param {Coordinate} coordinate Coordinate.\n * @param {number} [fractionDigits] The number of digits to include\n *    after the decimal point. Default is `0`.\n * @return {string} XY.\n * @api\n */\nexport function toStringXY(coordinate, fractionDigits) {\n  return format(coordinate, '{x}, {y}', fractionDigits);\n}\n\n/**\n * Modifies the provided coordinate in-place to be within the real world\n * extent. The lower projection extent boundary is inclusive, the upper one\n * exclusive.\n *\n * @param {Coordinate} coordinate Coordinate.\n * @param {import(\"./proj/Projection.js\").default} projection Projection.\n * @return {Coordinate} The coordinate within the real world extent.\n */\nexport function wrapX(coordinate, projection) {\n  if (projection.canWrapX()) {\n    const worldWidth = getWidth(projection.getExtent());\n    const worldsAway = getWorldsAway(coordinate, projection, worldWidth);\n    if (worldsAway) {\n      coordinate[0] -= worldsAway * worldWidth;\n    }\n  }\n  return coordinate;\n}\n/**\n * @param {Coordinate} coordinate Coordinate.\n * @param {import(\"./proj/Projection.js\").default} projection Projection.\n * @param {number} [sourceExtentWidth] Width of the source extent.\n * @return {number} Offset in world widths.\n */\nexport function getWorldsAway(coordinate, projection, sourceExtentWidth) {\n  const projectionExtent = projection.getExtent();\n  let worldsAway = 0;\n  if (\n    projection.canWrapX() &&\n    (coordinate[0] < projectionExtent[0] || coordinate[0] > projectionExtent[2])\n  ) {\n    sourceExtentWidth = sourceExtentWidth || getWidth(projectionExtent);\n    worldsAway = Math.floor(\n      (coordinate[0] - projectionExtent[0]) / sourceExtentWidth\n    );\n  }\n  return worldsAway;\n}\n","/**\n * @module ol/sphere\n */\nimport {toDegrees, toRadians} from './math.js';\n\n/**\n * Object literal with options for the {@link getLength} or {@link getArea}\n * functions.\n * @typedef {Object} SphereMetricOptions\n * @property {import(\"./proj.js\").ProjectionLike} [projection='EPSG:3857']\n * Projection of the  geometry.  By default, the geometry is assumed to be in\n * Web Mercator.\n * @property {number} [radius=6371008.8] Sphere radius.  By default, the\n * [mean Earth radius](https://en.wikipedia.org/wiki/Earth_radius#Mean_radius)\n * for the WGS84 ellipsoid is used.\n */\n\n/**\n * The mean Earth radius (1/3 * (2a + b)) for the WGS84 ellipsoid.\n * https://en.wikipedia.org/wiki/Earth_radius#Mean_radius\n * @type {number}\n */\nexport const DEFAULT_RADIUS = 6371008.8;\n\n/**\n * Get the great circle distance (in meters) between two geographic coordinates.\n * @param {Array} c1 Starting coordinate.\n * @param {Array} c2 Ending coordinate.\n * @param {number} [radius] The sphere radius to use.  Defaults to the Earth's\n *     mean radius using the WGS84 ellipsoid.\n * @return {number} The great circle distance between the points (in meters).\n * @api\n */\nexport function getDistance(c1, c2, radius) {\n  radius = radius || DEFAULT_RADIUS;\n  const lat1 = toRadians(c1[1]);\n  const lat2 = toRadians(c2[1]);\n  const deltaLatBy2 = (lat2 - lat1) / 2;\n  const deltaLonBy2 = toRadians(c2[0] - c1[0]) / 2;\n  const a =\n    Math.sin(deltaLatBy2) * Math.sin(deltaLatBy2) +\n    Math.sin(deltaLonBy2) *\n      Math.sin(deltaLonBy2) *\n      Math.cos(lat1) *\n      Math.cos(lat2);\n  return 2 * radius * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));\n}\n\n/**\n * Get the cumulative great circle length of linestring coordinates (geographic).\n * @param {Array} coordinates Linestring coordinates.\n * @param {number} radius The sphere radius to use.\n * @return {number} The length (in meters).\n */\nfunction getLengthInternal(coordinates, radius) {\n  let length = 0;\n  for (let i = 0, ii = coordinates.length; i < ii - 1; ++i) {\n    length += getDistance(coordinates[i], coordinates[i + 1], radius);\n  }\n  return length;\n}\n\n/**\n * Get the spherical length of a geometry.  This length is the sum of the\n * great circle distances between coordinates.  For polygons, the length is\n * the sum of all rings.  For points, the length is zero.  For multi-part\n * geometries, the length is the sum of the length of each part.\n * @param {import(\"./geom/Geometry.js\").default} geometry A geometry.\n * @param {SphereMetricOptions} [options] Options for the\n * length calculation.  By default, geometries are assumed to be in 'EPSG:3857'.\n * You can change this by providing a `projection` option.\n * @return {number} The spherical length (in meters).\n * @api\n */\nexport function getLength(geometry, options) {\n  options = options || {};\n  const radius = options.radius || DEFAULT_RADIUS;\n  const projection = options.projection || 'EPSG:3857';\n  const type = geometry.getType();\n  if (type !== 'GeometryCollection') {\n    geometry = geometry.clone().transform(projection, 'EPSG:4326');\n  }\n  let length = 0;\n  let coordinates, coords, i, ii, j, jj;\n  switch (type) {\n    case 'Point':\n    case 'MultiPoint': {\n      break;\n    }\n    case 'LineString':\n    case 'LinearRing': {\n      coordinates = /** @type {import(\"./geom/SimpleGeometry.js\").default} */ (\n        geometry\n      ).getCoordinates();\n      length = getLengthInternal(coordinates, radius);\n      break;\n    }\n    case 'MultiLineString':\n    case 'Polygon': {\n      coordinates = /** @type {import(\"./geom/SimpleGeometry.js\").default} */ (\n        geometry\n      ).getCoordinates();\n      for (i = 0, ii = coordinates.length; i < ii; ++i) {\n        length += getLengthInternal(coordinates[i], radius);\n      }\n      break;\n    }\n    case 'MultiPolygon': {\n      coordinates = /** @type {import(\"./geom/SimpleGeometry.js\").default} */ (\n        geometry\n      ).getCoordinates();\n      for (i = 0, ii = coordinates.length; i < ii; ++i) {\n        coords = coordinates[i];\n        for (j = 0, jj = coords.length; j < jj; ++j) {\n          length += getLengthInternal(coords[j], radius);\n        }\n      }\n      break;\n    }\n    case 'GeometryCollection': {\n      const geometries =\n        /** @type {import(\"./geom/GeometryCollection.js\").default} */ (\n          geometry\n        ).getGeometries();\n      for (i = 0, ii = geometries.length; i < ii; ++i) {\n        length += getLength(geometries[i], options);\n      }\n      break;\n    }\n    default: {\n      throw new Error('Unsupported geometry type: ' + type);\n    }\n  }\n  return length;\n}\n\n/**\n * Returns the spherical area for a list of coordinates.\n *\n * [Reference](https://trs.jpl.nasa.gov/handle/2014/40409)\n * Robert. G. Chamberlain and William H. Duquette, \"Some Algorithms for\n * Polygons on a Sphere\", JPL Publication 07-03, Jet Propulsion\n * Laboratory, Pasadena, CA, June 2007\n *\n * @param {Array<import(\"./coordinate.js\").Coordinate>} coordinates List of coordinates of a linear\n * ring. If the ring is oriented clockwise, the area will be positive,\n * otherwise it will be negative.\n * @param {number} radius The sphere radius.\n * @return {number} Area (in square meters).\n */\nfunction getAreaInternal(coordinates, radius) {\n  let area = 0;\n  const len = coordinates.length;\n  let x1 = coordinates[len - 1][0];\n  let y1 = coordinates[len - 1][1];\n  for (let i = 0; i < len; i++) {\n    const x2 = coordinates[i][0];\n    const y2 = coordinates[i][1];\n    area +=\n      toRadians(x2 - x1) *\n      (2 + Math.sin(toRadians(y1)) + Math.sin(toRadians(y2)));\n    x1 = x2;\n    y1 = y2;\n  }\n  return (area * radius * radius) / 2.0;\n}\n\n/**\n * Get the spherical area of a geometry.  This is the area (in meters) assuming\n * that polygon edges are segments of great circles on a sphere.\n * @param {import(\"./geom/Geometry.js\").default} geometry A geometry.\n * @param {SphereMetricOptions} [options] Options for the area\n *     calculation.  By default, geometries are assumed to be in 'EPSG:3857'.\n *     You can change this by providing a `projection` option.\n * @return {number} The spherical area (in square meters).\n * @api\n */\nexport function getArea(geometry, options) {\n  options = options || {};\n  const radius = options.radius || DEFAULT_RADIUS;\n  const projection = options.projection || 'EPSG:3857';\n  const type = geometry.getType();\n  if (type !== 'GeometryCollection') {\n    geometry = geometry.clone().transform(projection, 'EPSG:4326');\n  }\n  let area = 0;\n  let coordinates, coords, i, ii, j, jj;\n  switch (type) {\n    case 'Point':\n    case 'MultiPoint':\n    case 'LineString':\n    case 'MultiLineString':\n    case 'LinearRing': {\n      break;\n    }\n    case 'Polygon': {\n      coordinates = /** @type {import(\"./geom/Polygon.js\").default} */ (\n        geometry\n      ).getCoordinates();\n      area = Math.abs(getAreaInternal(coordinates[0], radius));\n      for (i = 1, ii = coordinates.length; i < ii; ++i) {\n        area -= Math.abs(getAreaInternal(coordinates[i], radius));\n      }\n      break;\n    }\n    case 'MultiPolygon': {\n      coordinates = /** @type {import(\"./geom/SimpleGeometry.js\").default} */ (\n        geometry\n      ).getCoordinates();\n      for (i = 0, ii = coordinates.length; i < ii; ++i) {\n        coords = coordinates[i];\n        area += Math.abs(getAreaInternal(coords[0], radius));\n        for (j = 1, jj = coords.length; j < jj; ++j) {\n          area -= Math.abs(getAreaInternal(coords[j], radius));\n        }\n      }\n      break;\n    }\n    case 'GeometryCollection': {\n      const geometries =\n        /** @type {import(\"./geom/GeometryCollection.js\").default} */ (\n          geometry\n        ).getGeometries();\n      for (i = 0, ii = geometries.length; i < ii; ++i) {\n        area += getArea(geometries[i], options);\n      }\n      break;\n    }\n    default: {\n      throw new Error('Unsupported geometry type: ' + type);\n    }\n  }\n  return area;\n}\n\n/**\n * Returns the coordinate at the given distance and bearing from `c1`.\n *\n * @param {import(\"./coordinate.js\").Coordinate} c1 The origin point (`[lon, lat]` in degrees).\n * @param {number} distance The great-circle distance between the origin\n *     point and the target point.\n * @param {number} bearing The bearing (in radians).\n * @param {number} [radius] The sphere radius to use.  Defaults to the Earth's\n *     mean radius using the WGS84 ellipsoid.\n * @return {import(\"./coordinate.js\").Coordinate} The target point.\n */\nexport function offset(c1, distance, bearing, radius) {\n  radius = radius || DEFAULT_RADIUS;\n  const lat1 = toRadians(c1[1]);\n  const lon1 = toRadians(c1[0]);\n  const dByR = distance / radius;\n  const lat = Math.asin(\n    Math.sin(lat1) * Math.cos(dByR) +\n      Math.cos(lat1) * Math.sin(dByR) * Math.cos(bearing)\n  );\n  const lon =\n    lon1 +\n    Math.atan2(\n      Math.sin(bearing) * Math.sin(dByR) * Math.cos(lat1),\n      Math.cos(dByR) - Math.sin(lat1) * Math.sin(lat)\n    );\n  return [toDegrees(lon), toDegrees(lat)];\n}\n","/**\n * @module ol/console\n */\n\n/**\n * @typedef {'info'|'warn'|'error'|'none'} Level\n */\n\n/**\n * @type {Object<Level, number>}\n */\nconst levels = {\n  info: 1,\n  warn: 2,\n  error: 3,\n  none: 4,\n};\n\n/**\n * @type {number}\n */\nlet level = levels.info;\n\n/**\n * Set the logging level.  By default, the level is set to 'info' and all\n * messages will be logged.  Set to 'warn' to only display warnings and errors.\n * Set to 'error' to only display errors.  Set to 'none' to silence all messages.\n *\n * @param {Level} l The new level.\n */\nexport function setLevel(l) {\n  level = levels[l];\n}\n\nexport function log(...args) {\n  if (level > levels.info) {\n    return;\n  }\n  console.log(...args); // eslint-disable-line no-console\n}\n\nexport function warn(...args) {\n  if (level > levels.warn) {\n    return;\n  }\n  console.warn(...args); // eslint-disable-line no-console\n}\n\nexport function error(...args) {\n  if (level > levels.error) {\n    return;\n  }\n  console.error(...args); // eslint-disable-line no-console\n}\n","/**\n * @module ol/proj\n */\n\n/**\n * The ol/proj module stores:\n * * a list of {@link module:ol/proj/Projection~Projection}\n * objects, one for each projection supported by the application\n * * a list of transform functions needed to convert coordinates in one projection\n * into another.\n *\n * The static functions are the methods used to maintain these.\n * Each transform function can handle not only simple coordinate pairs, but also\n * large arrays of coordinates such as vector geometries.\n *\n * When loaded, the library adds projection objects for EPSG:4326 (WGS84\n * geographic coordinates) and EPSG:3857 (Web or Spherical Mercator, as used\n * for example by Bing Maps or OpenStreetMap), together with the relevant\n * transform functions.\n *\n * Additional transforms may be added by using the http://proj4js.org/\n * library (version 2.2 or later). You can use the full build supplied by\n * Proj4js, or create a custom build to support those projections you need; see\n * the Proj4js website for how to do this. You also need the Proj4js definitions\n * for the required projections. These definitions can be obtained from\n * https://epsg.io/, and are a JS function, so can be loaded in a script\n * tag (as in the examples) or pasted into your application.\n *\n * After all required projection definitions are added to proj4's registry (by\n * using `proj4.defs()`), simply call `register(proj4)` from the `ol/proj/proj4`\n * package. Existing transforms are not changed by this function. See\n * examples/wms-image-custom-proj for an example of this.\n *\n * Additional projection definitions can be registered with `proj4.defs()` any\n * time. Just make sure to call `register(proj4)` again; for example, with user-supplied data where you don't\n * know in advance what projections are needed, you can initially load minimal\n * support and then load whichever are requested.\n *\n * Note that Proj4js does not support projection extents. If you want to add\n * one for creating default tile grids, you can add it after the Projection\n * object has been created with `setExtent`, for example,\n * `get('EPSG:1234').setExtent(extent)`.\n *\n * In addition to Proj4js support, any transform functions can be added with\n * {@link module:ol/proj.addCoordinateTransforms}. To use this, you must first create\n * a {@link module:ol/proj/Projection~Projection} object for the new projection and add it with\n * {@link module:ol/proj.addProjection}. You can then add the forward and inverse\n * functions with {@link module:ol/proj.addCoordinateTransforms}. See\n * examples/wms-custom-proj for an example of this.\n *\n * Note that if no transforms are needed and you only need to define the\n * projection, just add a {@link module:ol/proj/Projection~Projection} with\n * {@link module:ol/proj.addProjection}. See examples/wms-no-proj for an example of\n * this.\n */\nimport Projection from './proj/Projection.js';\nimport {\n  PROJECTIONS as EPSG3857_PROJECTIONS,\n  fromEPSG4326,\n  toEPSG4326,\n} from './proj/epsg3857.js';\nimport {PROJECTIONS as EPSG4326_PROJECTIONS} from './proj/epsg4326.js';\nimport {METERS_PER_UNIT} from './proj/Units.js';\nimport {\n  add as addProj,\n  clear as clearProj,\n  get as getProj,\n} from './proj/projections.js';\nimport {\n  add as addTransformFunc,\n  clear as clearTransformFuncs,\n  get as getTransformFunc,\n} from './proj/transforms.js';\nimport {applyTransform, getWidth} from './extent.js';\nimport {clamp, modulo} from './math.js';\nimport {equals, getWorldsAway} from './coordinate.js';\nimport {getDistance} from './sphere.js';\nimport {warn} from './console.js';\n\n/**\n * A projection as {@link module:ol/proj/Projection~Projection}, SRS identifier\n * string or undefined.\n * @typedef {Projection|string|undefined} ProjectionLike\n * @api\n */\n\n/**\n * A transform function accepts an array of input coordinate values, an optional\n * output array, and an optional dimension (default should be 2).  The function\n * transforms the input coordinate values, populates the output array, and\n * returns the output array.\n *\n * @typedef {function(Array<number>, Array<number>=, number=): Array<number>} TransformFunction\n * @api\n */\n\nexport {METERS_PER_UNIT};\n\nexport {Projection};\n\nlet showCoordinateWarning = true;\n\n/**\n * @param {boolean} [disable = true] Disable console info about `useGeographic()`\n */\nexport function disableCoordinateWarning(disable) {\n  const hide = disable === undefined ? true : disable;\n  showCoordinateWarning = !hide;\n}\n\n/**\n * @param {Array<number>} input Input coordinate array.\n * @param {Array<number>} [output] Output array of coordinate values.\n * @return {Array<number>} Output coordinate array (new array, same coordinate\n *     values).\n */\nexport function cloneTransform(input, output) {\n  if (output !== undefined) {\n    for (let i = 0, ii = input.length; i < ii; ++i) {\n      output[i] = input[i];\n    }\n    output = output;\n  } else {\n    output = input.slice();\n  }\n  return output;\n}\n\n/**\n * @param {Array<number>} input Input coordinate array.\n * @param {Array<number>} [output] Output array of coordinate values.\n * @return {Array<number>} Input coordinate array (same array as input).\n */\nexport function identityTransform(input, output) {\n  if (output !== undefined && input !== output) {\n    for (let i = 0, ii = input.length; i < ii; ++i) {\n      output[i] = input[i];\n    }\n    input = output;\n  }\n  return input;\n}\n\n/**\n * Add a Projection object to the list of supported projections that can be\n * looked up by their code.\n *\n * @param {Projection} projection Projection instance.\n * @api\n */\nexport function addProjection(projection) {\n  addProj(projection.getCode(), projection);\n  addTransformFunc(projection, projection, cloneTransform);\n}\n\n/**\n * @param {Array<Projection>} projections Projections.\n */\nexport function addProjections(projections) {\n  projections.forEach(addProjection);\n}\n\n/**\n * Fetches a Projection object for the code specified.\n *\n * @param {ProjectionLike} projectionLike Either a code string which is\n *     a combination of authority and identifier such as \"EPSG:4326\", or an\n *     existing projection object, or undefined.\n * @return {Projection|null} Projection object, or null if not in list.\n * @api\n */\nexport function get(projectionLike) {\n  return typeof projectionLike === 'string'\n    ? getProj(/** @type {string} */ (projectionLike))\n    : /** @type {Projection} */ (projectionLike) || null;\n}\n\n/**\n * Get the resolution of the point in degrees or distance units.\n * For projections with degrees as the unit this will simply return the\n * provided resolution. For other projections the point resolution is\n * by default estimated by transforming the `point` pixel to EPSG:4326,\n * measuring its width and height on the normal sphere,\n * and taking the average of the width and height.\n * A custom function can be provided for a specific projection, either\n * by setting the `getPointResolution` option in the\n * {@link module:ol/proj/Projection~Projection} constructor or by using\n * {@link module:ol/proj/Projection~Projection#setGetPointResolution} to change an existing\n * projection object.\n * @param {ProjectionLike} projection The projection.\n * @param {number} resolution Nominal resolution in projection units.\n * @param {import(\"./coordinate.js\").Coordinate} point Point to find adjusted resolution at.\n * @param {import(\"./proj/Units.js\").Units} [units] Units to get the point resolution in.\n * Default is the projection's units.\n * @return {number} Point resolution.\n * @api\n */\nexport function getPointResolution(projection, resolution, point, units) {\n  projection = get(projection);\n  let pointResolution;\n  const getter = projection.getPointResolutionFunc();\n  if (getter) {\n    pointResolution = getter(resolution, point);\n    if (units && units !== projection.getUnits()) {\n      const metersPerUnit = projection.getMetersPerUnit();\n      if (metersPerUnit) {\n        pointResolution =\n          (pointResolution * metersPerUnit) / METERS_PER_UNIT[units];\n      }\n    }\n  } else {\n    const projUnits = projection.getUnits();\n    if ((projUnits == 'degrees' && !units) || units == 'degrees') {\n      pointResolution = resolution;\n    } else {\n      // Estimate point resolution by transforming the center pixel to EPSG:4326,\n      // measuring its width and height on the normal sphere, and taking the\n      // average of the width and height.\n      const toEPSG4326 = getTransformFromProjections(\n        projection,\n        get('EPSG:4326')\n      );\n      if (toEPSG4326 === identityTransform && projUnits !== 'degrees') {\n        // no transform is available\n        pointResolution = resolution * projection.getMetersPerUnit();\n      } else {\n        let vertices = [\n          point[0] - resolution / 2,\n          point[1],\n          point[0] + resolution / 2,\n          point[1],\n          point[0],\n          point[1] - resolution / 2,\n          point[0],\n          point[1] + resolution / 2,\n        ];\n        vertices = toEPSG4326(vertices, vertices, 2);\n        const width = getDistance(vertices.slice(0, 2), vertices.slice(2, 4));\n        const height = getDistance(vertices.slice(4, 6), vertices.slice(6, 8));\n        pointResolution = (width + height) / 2;\n      }\n      const metersPerUnit = units\n        ? METERS_PER_UNIT[units]\n        : projection.getMetersPerUnit();\n      if (metersPerUnit !== undefined) {\n        pointResolution /= metersPerUnit;\n      }\n    }\n  }\n  return pointResolution;\n}\n\n/**\n * Registers transformation functions that don't alter coordinates. Those allow\n * to transform between projections with equal meaning.\n *\n * @param {Array<Projection>} projections Projections.\n * @api\n */\nexport function addEquivalentProjections(projections) {\n  addProjections(projections);\n  projections.forEach(function (source) {\n    projections.forEach(function (destination) {\n      if (source !== destination) {\n        addTransformFunc(source, destination, cloneTransform);\n      }\n    });\n  });\n}\n\n/**\n * Registers transformation functions to convert coordinates in any projection\n * in projection1 to any projection in projection2.\n *\n * @param {Array<Projection>} projections1 Projections with equal\n *     meaning.\n * @param {Array<Projection>} projections2 Projections with equal\n *     meaning.\n * @param {TransformFunction} forwardTransform Transformation from any\n *   projection in projection1 to any projection in projection2.\n * @param {TransformFunction} inverseTransform Transform from any projection\n *   in projection2 to any projection in projection1..\n */\nexport function addEquivalentTransforms(\n  projections1,\n  projections2,\n  forwardTransform,\n  inverseTransform\n) {\n  projections1.forEach(function (projection1) {\n    projections2.forEach(function (projection2) {\n      addTransformFunc(projection1, projection2, forwardTransform);\n      addTransformFunc(projection2, projection1, inverseTransform);\n    });\n  });\n}\n\n/**\n * Clear all cached projections and transforms.\n */\nexport function clearAllProjections() {\n  clearProj();\n  clearTransformFuncs();\n}\n\n/**\n * @param {Projection|string|undefined} projection Projection.\n * @param {string} defaultCode Default code.\n * @return {Projection} Projection.\n */\nexport function createProjection(projection, defaultCode) {\n  if (!projection) {\n    return get(defaultCode);\n  }\n  if (typeof projection === 'string') {\n    return get(projection);\n  }\n  return /** @type {Projection} */ (projection);\n}\n\n/**\n * Creates a {@link module:ol/proj~TransformFunction} from a simple 2D coordinate transform\n * function.\n * @param {function(import(\"./coordinate.js\").Coordinate): import(\"./coordinate.js\").Coordinate} coordTransform Coordinate\n *     transform.\n * @return {TransformFunction} Transform function.\n */\nexport function createTransformFromCoordinateTransform(coordTransform) {\n  return (\n    /**\n     * @param {Array<number>} input Input.\n     * @param {Array<number>} [output] Output.\n     * @param {number} [dimension] Dimension.\n     * @return {Array<number>} Output.\n     */\n    function (input, output, dimension) {\n      const length = input.length;\n      dimension = dimension !== undefined ? dimension : 2;\n      output = output !== undefined ? output : new Array(length);\n      for (let i = 0; i < length; i += dimension) {\n        const point = coordTransform(input.slice(i, i + dimension));\n        const pointLength = point.length;\n        for (let j = 0, jj = dimension; j < jj; ++j) {\n          output[i + j] = j >= pointLength ? input[i + j] : point[j];\n        }\n      }\n      return output;\n    }\n  );\n}\n\n/**\n * Registers coordinate transform functions to convert coordinates between the\n * source projection and the destination projection.\n * The forward and inverse functions convert coordinate pairs; this function\n * converts these into the functions used internally which also handle\n * extents and coordinate arrays.\n *\n * @param {ProjectionLike} source Source projection.\n * @param {ProjectionLike} destination Destination projection.\n * @param {function(import(\"./coordinate.js\").Coordinate): import(\"./coordinate.js\").Coordinate} forward The forward transform\n *     function (that is, from the source projection to the destination\n *     projection) that takes a {@link module:ol/coordinate~Coordinate} as argument and returns\n *     the transformed {@link module:ol/coordinate~Coordinate}.\n * @param {function(import(\"./coordinate.js\").Coordinate): import(\"./coordinate.js\").Coordinate} inverse The inverse transform\n *     function (that is, from the destination projection to the source\n *     projection) that takes a {@link module:ol/coordinate~Coordinate} as argument and returns\n *     the transformed {@link module:ol/coordinate~Coordinate}. If the transform function can only\n *     transform less dimensions than the input coordinate, it is supposeed to return a coordinate\n *     with only the length it can transform. The other dimensions will be taken unchanged from the\n *     source.\n * @api\n */\nexport function addCoordinateTransforms(source, destination, forward, inverse) {\n  const sourceProj = get(source);\n  const destProj = get(destination);\n  addTransformFunc(\n    sourceProj,\n    destProj,\n    createTransformFromCoordinateTransform(forward)\n  );\n  addTransformFunc(\n    destProj,\n    sourceProj,\n    createTransformFromCoordinateTransform(inverse)\n  );\n}\n\n/**\n * Transforms a coordinate from longitude/latitude to a different projection.\n * @param {import(\"./coordinate.js\").Coordinate} coordinate Coordinate as longitude and latitude, i.e.\n *     an array with longitude as 1st and latitude as 2nd element.\n * @param {ProjectionLike} [projection] Target projection. The\n *     default is Web Mercator, i.e. 'EPSG:3857'.\n * @return {import(\"./coordinate.js\").Coordinate} Coordinate projected to the target projection.\n * @api\n */\nexport function fromLonLat(coordinate, projection) {\n  disableCoordinateWarning();\n  return transform(\n    coordinate,\n    'EPSG:4326',\n    projection !== undefined ? projection : 'EPSG:3857'\n  );\n}\n\n/**\n * Transforms a coordinate to longitude/latitude.\n * @param {import(\"./coordinate.js\").Coordinate} coordinate Projected coordinate.\n * @param {ProjectionLike} [projection] Projection of the coordinate.\n *     The default is Web Mercator, i.e. 'EPSG:3857'.\n * @return {import(\"./coordinate.js\").Coordinate} Coordinate as longitude and latitude, i.e. an array\n *     with longitude as 1st and latitude as 2nd element.\n * @api\n */\nexport function toLonLat(coordinate, projection) {\n  const lonLat = transform(\n    coordinate,\n    projection !== undefined ? projection : 'EPSG:3857',\n    'EPSG:4326'\n  );\n  const lon = lonLat[0];\n  if (lon < -180 || lon > 180) {\n    lonLat[0] = modulo(lon + 180, 360) - 180;\n  }\n  return lonLat;\n}\n\n/**\n * Checks if two projections are the same, that is every coordinate in one\n * projection does represent the same geographic point as the same coordinate in\n * the other projection.\n *\n * @param {Projection} projection1 Projection 1.\n * @param {Projection} projection2 Projection 2.\n * @return {boolean} Equivalent.\n * @api\n */\nexport function equivalent(projection1, projection2) {\n  if (projection1 === projection2) {\n    return true;\n  }\n  const equalUnits = projection1.getUnits() === projection2.getUnits();\n  if (projection1.getCode() === projection2.getCode()) {\n    return equalUnits;\n  }\n  const transformFunc = getTransformFromProjections(projection1, projection2);\n  return transformFunc === cloneTransform && equalUnits;\n}\n\n/**\n * Searches in the list of transform functions for the function for converting\n * coordinates from the source projection to the destination projection.\n *\n * @param {Projection} sourceProjection Source Projection object.\n * @param {Projection} destinationProjection Destination Projection\n *     object.\n * @return {TransformFunction} Transform function.\n */\nexport function getTransformFromProjections(\n  sourceProjection,\n  destinationProjection\n) {\n  const sourceCode = sourceProjection.getCode();\n  const destinationCode = destinationProjection.getCode();\n  let transformFunc = getTransformFunc(sourceCode, destinationCode);\n  if (!transformFunc) {\n    transformFunc = identityTransform;\n  }\n  return transformFunc;\n}\n\n/**\n * Given the projection-like objects, searches for a transformation\n * function to convert a coordinates array from the source projection to the\n * destination projection.\n *\n * @param {ProjectionLike} source Source.\n * @param {ProjectionLike} destination Destination.\n * @return {TransformFunction} Transform function.\n * @api\n */\nexport function getTransform(source, destination) {\n  const sourceProjection = get(source);\n  const destinationProjection = get(destination);\n  return getTransformFromProjections(sourceProjection, destinationProjection);\n}\n\n/**\n * Transforms a coordinate from source projection to destination projection.\n * This returns a new coordinate (and does not modify the original).\n *\n * See {@link module:ol/proj.transformExtent} for extent transformation.\n * See the transform method of {@link module:ol/geom/Geometry~Geometry} and its\n * subclasses for geometry transforms.\n *\n * @param {import(\"./coordinate.js\").Coordinate} coordinate Coordinate.\n * @param {ProjectionLike} source Source projection-like.\n * @param {ProjectionLike} destination Destination projection-like.\n * @return {import(\"./coordinate.js\").Coordinate} Coordinate.\n * @api\n */\nexport function transform(coordinate, source, destination) {\n  const transformFunc = getTransform(source, destination);\n  return transformFunc(coordinate, undefined, coordinate.length);\n}\n\n/**\n * Transforms an extent from source projection to destination projection.  This\n * returns a new extent (and does not modify the original).\n *\n * @param {import(\"./extent.js\").Extent} extent The extent to transform.\n * @param {ProjectionLike} source Source projection-like.\n * @param {ProjectionLike} destination Destination projection-like.\n * @param {number} [stops] Number of stops per side used for the transform.\n * By default only the corners are used.\n * @return {import(\"./extent.js\").Extent} The transformed extent.\n * @api\n */\nexport function transformExtent(extent, source, destination, stops) {\n  const transformFunc = getTransform(source, destination);\n  return applyTransform(extent, transformFunc, undefined, stops);\n}\n\n/**\n * Transforms the given point to the destination projection.\n *\n * @param {import(\"./coordinate.js\").Coordinate} point Point.\n * @param {Projection} sourceProjection Source projection.\n * @param {Projection} destinationProjection Destination projection.\n * @return {import(\"./coordinate.js\").Coordinate} Point.\n */\nexport function transformWithProjections(\n  point,\n  sourceProjection,\n  destinationProjection\n) {\n  const transformFunc = getTransformFromProjections(\n    sourceProjection,\n    destinationProjection\n  );\n  return transformFunc(point);\n}\n\n/**\n * @type {Projection|null}\n */\nlet userProjection = null;\n\n/**\n * Set the projection for coordinates supplied from and returned by API methods.\n * This includes all API methods except for those interacting with tile grids,\n * plus {@link import(\"./Map.js\").FrameState} and {@link import(\"./View.js\").State}.\n * @param {ProjectionLike} projection The user projection.\n * @api\n */\nexport function setUserProjection(projection) {\n  userProjection = get(projection);\n}\n\n/**\n * Clear the user projection if set.\n * @api\n */\nexport function clearUserProjection() {\n  userProjection = null;\n}\n\n/**\n * Get the projection for coordinates supplied from and returned by API methods.\n * @return {Projection|null} The user projection (or null if not set).\n * @api\n */\nexport function getUserProjection() {\n  return userProjection;\n}\n\n/**\n * Use geographic coordinates (WGS-84 datum) in API methods.\n * This includes all API methods except for those interacting with tile grids,\n * plus {@link import(\"./Map.js\").FrameState} and {@link import(\"./View.js\").State}.\n * @api\n */\nexport function useGeographic() {\n  setUserProjection('EPSG:4326');\n}\n\n/**\n * Return a coordinate transformed into the user projection.  If no user projection\n * is set, the original coordinate is returned.\n * @param {Array<number>} coordinate Input coordinate.\n * @param {ProjectionLike} sourceProjection The input coordinate projection.\n * @return {Array<number>} The input coordinate in the user projection.\n */\nexport function toUserCoordinate(coordinate, sourceProjection) {\n  if (!userProjection) {\n    return coordinate;\n  }\n  return transform(coordinate, sourceProjection, userProjection);\n}\n\n/**\n * Return a coordinate transformed from the user projection.  If no user projection\n * is set, the original coordinate is returned.\n * @param {Array<number>} coordinate Input coordinate.\n * @param {ProjectionLike} destProjection The destination projection.\n * @return {Array<number>} The input coordinate transformed.\n */\nexport function fromUserCoordinate(coordinate, destProjection) {\n  if (!userProjection) {\n    if (\n      showCoordinateWarning &&\n      !equals(coordinate, [0, 0]) &&\n      coordinate[0] >= -180 &&\n      coordinate[0] <= 180 &&\n      coordinate[1] >= -90 &&\n      coordinate[1] <= 90\n    ) {\n      showCoordinateWarning = false;\n      warn(\n        'Call useGeographic() from ol/proj once to work with [longitude, latitude] coordinates.'\n      );\n    }\n    return coordinate;\n  }\n  return transform(coordinate, userProjection, destProjection);\n}\n\n/**\n * Return an extent transformed into the user projection.  If no user projection\n * is set, the original extent is returned.\n * @param {import(\"./extent.js\").Extent} extent Input extent.\n * @param {ProjectionLike} sourceProjection The input extent projection.\n * @return {import(\"./extent.js\").Extent} The input extent in the user projection.\n */\nexport function toUserExtent(extent, sourceProjection) {\n  if (!userProjection) {\n    return extent;\n  }\n  return transformExtent(extent, sourceProjection, userProjection);\n}\n\n/**\n * Return an extent transformed from the user projection.  If no user projection\n * is set, the original extent is returned.\n * @param {import(\"./extent.js\").Extent} extent Input extent.\n * @param {ProjectionLike} destProjection The destination projection.\n * @return {import(\"./extent.js\").Extent} The input extent transformed.\n */\nexport function fromUserExtent(extent, destProjection) {\n  if (!userProjection) {\n    return extent;\n  }\n  return transformExtent(extent, userProjection, destProjection);\n}\n\n/**\n * Return the resolution in user projection units per pixel. If no user projection\n * is set, or source or user projection are missing units, the original resolution\n * is returned.\n * @param {number} resolution Resolution in input projection units per pixel.\n * @param {ProjectionLike} sourceProjection The input projection.\n * @return {number} Resolution in user projection units per pixel.\n */\nexport function toUserResolution(resolution, sourceProjection) {\n  if (!userProjection) {\n    return resolution;\n  }\n  const sourceUnits = get(sourceProjection).getUnits();\n  const userUnits = userProjection.getUnits();\n  return sourceUnits && userUnits\n    ? (resolution * METERS_PER_UNIT[sourceUnits]) / METERS_PER_UNIT[userUnits]\n    : resolution;\n}\n\n/**\n * Return the resolution in user projection units per pixel. If no user projection\n * is set, or source or user projection are missing units, the original resolution\n * is returned.\n * @param {number} resolution Resolution in user projection units per pixel.\n * @param {ProjectionLike} destProjection The destination projection.\n * @return {number} Resolution in destination projection units per pixel.\n */\nexport function fromUserResolution(resolution, destProjection) {\n  if (!userProjection) {\n    return resolution;\n  }\n  const sourceUnits = get(destProjection).getUnits();\n  const userUnits = userProjection.getUnits();\n  return sourceUnits && userUnits\n    ? (resolution * METERS_PER_UNIT[userUnits]) / METERS_PER_UNIT[sourceUnits]\n    : resolution;\n}\n\n/**\n * Creates a safe coordinate transform function from a coordinate transform function.\n * \"Safe\" means that it can handle wrapping of x-coordinates for global projections,\n * and that coordinates exceeding the source projection validity extent's range will be\n * clamped to the validity range.\n * @param {Projection} sourceProj Source projection.\n * @param {Projection} destProj Destination projection.\n * @param {function(import(\"./coordinate.js\").Coordinate): import(\"./coordinate.js\").Coordinate} transform Transform function (source to destination).\n * @return {function(import(\"./coordinate.js\").Coordinate): import(\"./coordinate.js\").Coordinate} Safe transform function (source to destination).\n */\nexport function createSafeCoordinateTransform(sourceProj, destProj, transform) {\n  return function (coord) {\n    let transformed, worldsAway;\n    if (sourceProj.canWrapX()) {\n      const sourceExtent = sourceProj.getExtent();\n      const sourceExtentWidth = getWidth(sourceExtent);\n      coord = coord.slice(0);\n      worldsAway = getWorldsAway(coord, sourceProj, sourceExtentWidth);\n      if (worldsAway) {\n        // Move x to the real world\n        coord[0] = coord[0] - worldsAway * sourceExtentWidth;\n      }\n      coord[0] = clamp(coord[0], sourceExtent[0], sourceExtent[2]);\n      coord[1] = clamp(coord[1], sourceExtent[1], sourceExtent[3]);\n      transformed = transform(coord);\n    } else {\n      transformed = transform(coord);\n    }\n    if (worldsAway && destProj.canWrapX()) {\n      // Move transformed coordinate back to the offset world\n      transformed[0] += worldsAway * getWidth(destProj.getExtent());\n    }\n    return transformed;\n  };\n}\n\n/**\n * Add transforms to and from EPSG:4326 and EPSG:3857.  This function is called\n * by when this module is executed and should only need to be called again after\n * `clearAllProjections()` is called (e.g. in tests).\n */\nexport function addCommon() {\n  // Add transformations that don't alter coordinates to convert within set of\n  // projections with equal meaning.\n  addEquivalentProjections(EPSG3857_PROJECTIONS);\n  addEquivalentProjections(EPSG4326_PROJECTIONS);\n  // Add transformations to convert EPSG:4326 like coordinates to EPSG:3857 like\n  // coordinates and back.\n  addEquivalentTransforms(\n    EPSG4326_PROJECTIONS,\n    EPSG3857_PROJECTIONS,\n    fromEPSG4326,\n    toEPSG4326\n  );\n}\n\naddCommon();\n","/**\n * @module ol/geom/flat/transform\n */\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {import(\"../../transform.js\").Transform} transform Transform.\n * @param {Array<number>} [dest] Destination.\n * @return {Array<number>} Transformed coordinates.\n */\nexport function transform2D(\n  flatCoordinates,\n  offset,\n  end,\n  stride,\n  transform,\n  dest\n) {\n  dest = dest ? dest : [];\n  let i = 0;\n  for (let j = offset; j < end; j += stride) {\n    const x = flatCoordinates[j];\n    const y = flatCoordinates[j + 1];\n    dest[i++] = transform[0] * x + transform[2] * y + transform[4];\n    dest[i++] = transform[1] * x + transform[3] * y + transform[5];\n  }\n  if (dest && dest.length != i) {\n    dest.length = i;\n  }\n  return dest;\n}\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} angle Angle.\n * @param {Array<number>} anchor Rotation anchor point.\n * @param {Array<number>} [dest] Destination.\n * @return {Array<number>} Transformed coordinates.\n */\nexport function rotate(\n  flatCoordinates,\n  offset,\n  end,\n  stride,\n  angle,\n  anchor,\n  dest\n) {\n  dest = dest ? dest : [];\n  const cos = Math.cos(angle);\n  const sin = Math.sin(angle);\n  const anchorX = anchor[0];\n  const anchorY = anchor[1];\n  let i = 0;\n  for (let j = offset; j < end; j += stride) {\n    const deltaX = flatCoordinates[j] - anchorX;\n    const deltaY = flatCoordinates[j + 1] - anchorY;\n    dest[i++] = anchorX + deltaX * cos - deltaY * sin;\n    dest[i++] = anchorY + deltaX * sin + deltaY * cos;\n    for (let k = j + 2; k < j + stride; ++k) {\n      dest[i++] = flatCoordinates[k];\n    }\n  }\n  if (dest && dest.length != i) {\n    dest.length = i;\n  }\n  return dest;\n}\n\n/**\n * Scale the coordinates.\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} sx Scale factor in the x-direction.\n * @param {number} sy Scale factor in the y-direction.\n * @param {Array<number>} anchor Scale anchor point.\n * @param {Array<number>} [dest] Destination.\n * @return {Array<number>} Transformed coordinates.\n */\nexport function scale(\n  flatCoordinates,\n  offset,\n  end,\n  stride,\n  sx,\n  sy,\n  anchor,\n  dest\n) {\n  dest = dest ? dest : [];\n  const anchorX = anchor[0];\n  const anchorY = anchor[1];\n  let i = 0;\n  for (let j = offset; j < end; j += stride) {\n    const deltaX = flatCoordinates[j] - anchorX;\n    const deltaY = flatCoordinates[j + 1] - anchorY;\n    dest[i++] = anchorX + sx * deltaX;\n    dest[i++] = anchorY + sy * deltaY;\n    for (let k = j + 2; k < j + stride; ++k) {\n      dest[i++] = flatCoordinates[k];\n    }\n  }\n  if (dest && dest.length != i) {\n    dest.length = i;\n  }\n  return dest;\n}\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} deltaX Delta X.\n * @param {number} deltaY Delta Y.\n * @param {Array<number>} [dest] Destination.\n * @return {Array<number>} Transformed coordinates.\n */\nexport function translate(\n  flatCoordinates,\n  offset,\n  end,\n  stride,\n  deltaX,\n  deltaY,\n  dest\n) {\n  dest = dest ? dest : [];\n  let i = 0;\n  for (let j = offset; j < end; j += stride) {\n    dest[i++] = flatCoordinates[j] + deltaX;\n    dest[i++] = flatCoordinates[j + 1] + deltaY;\n    for (let k = j + 2; k < j + stride; ++k) {\n      dest[i++] = flatCoordinates[k];\n    }\n  }\n  if (dest && dest.length != i) {\n    dest.length = i;\n  }\n  return dest;\n}\n","/**\n * @module ol/geom/Geometry\n */\nimport BaseObject from '../Object.js';\nimport {abstract} from '../util.js';\nimport {\n  compose as composeTransform,\n  create as createTransform,\n} from '../transform.js';\nimport {\n  createEmpty,\n  createOrUpdateEmpty,\n  getHeight,\n  returnOrUpdate,\n} from '../extent.js';\nimport {get as getProjection, getTransform} from '../proj.js';\nimport {memoizeOne} from '../functions.js';\nimport {transform2D} from './flat/transform.js';\n\n/**\n * @typedef {'XY' | 'XYZ' | 'XYM' | 'XYZM'} GeometryLayout\n * The coordinate layout for geometries, indicating whether a 3rd or 4th z ('Z')\n * or measure ('M') coordinate is available.\n */\n\n/**\n * @typedef {'Point' | 'LineString' | 'LinearRing' | 'Polygon' | 'MultiPoint' | 'MultiLineString' | 'MultiPolygon' | 'GeometryCollection' | 'Circle'} Type\n * The geometry type.  One of `'Point'`, `'LineString'`, `'LinearRing'`,\n * `'Polygon'`, `'MultiPoint'`, `'MultiLineString'`, `'MultiPolygon'`,\n * `'GeometryCollection'`, or `'Circle'`.\n */\n\n/**\n * @type {import(\"../transform.js\").Transform}\n */\nconst tmpTransform = createTransform();\n\n/**\n * @classdesc\n * Abstract base class; normally only used for creating subclasses and not\n * instantiated in apps.\n * Base class for vector geometries.\n *\n * To get notified of changes to the geometry, register a listener for the\n * generic `change` event on your geometry instance.\n *\n * @abstract\n * @api\n */\nclass Geometry extends BaseObject {\n  constructor() {\n    super();\n\n    /**\n     * @private\n     * @type {import(\"../extent.js\").Extent}\n     */\n    this.extent_ = createEmpty();\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.extentRevision_ = -1;\n\n    /**\n     * @protected\n     * @type {number}\n     */\n    this.simplifiedGeometryMaxMinSquaredTolerance = 0;\n\n    /**\n     * @protected\n     * @type {number}\n     */\n    this.simplifiedGeometryRevision = 0;\n\n    /**\n     * Get a transformed and simplified version of the geometry.\n     * @abstract\n     * @param {number} revision The geometry revision.\n     * @param {number} squaredTolerance Squared tolerance.\n     * @param {import(\"../proj.js\").TransformFunction} [transform] Optional transform function.\n     * @return {Geometry} Simplified geometry.\n     */\n    this.simplifyTransformedInternal = memoizeOne(function (\n      revision,\n      squaredTolerance,\n      transform\n    ) {\n      if (!transform) {\n        return this.getSimplifiedGeometry(squaredTolerance);\n      }\n      const clone = this.clone();\n      clone.applyTransform(transform);\n      return clone.getSimplifiedGeometry(squaredTolerance);\n    });\n  }\n\n  /**\n   * Get a transformed and simplified version of the geometry.\n   * @abstract\n   * @param {number} squaredTolerance Squared tolerance.\n   * @param {import(\"../proj.js\").TransformFunction} [transform] Optional transform function.\n   * @return {Geometry} Simplified geometry.\n   */\n  simplifyTransformed(squaredTolerance, transform) {\n    return this.simplifyTransformedInternal(\n      this.getRevision(),\n      squaredTolerance,\n      transform\n    );\n  }\n\n  /**\n   * Make a complete copy of the geometry.\n   * @abstract\n   * @return {!Geometry} Clone.\n   */\n  clone() {\n    return abstract();\n  }\n\n  /**\n   * @abstract\n   * @param {number} x X.\n   * @param {number} y Y.\n   * @param {import(\"../coordinate.js\").Coordinate} closestPoint Closest point.\n   * @param {number} minSquaredDistance Minimum squared distance.\n   * @return {number} Minimum squared distance.\n   */\n  closestPointXY(x, y, closestPoint, minSquaredDistance) {\n    return abstract();\n  }\n\n  /**\n   * @param {number} x X.\n   * @param {number} y Y.\n   * @return {boolean} Contains (x, y).\n   */\n  containsXY(x, y) {\n    const coord = this.getClosestPoint([x, y]);\n    return coord[0] === x && coord[1] === y;\n  }\n\n  /**\n   * Return the closest point of the geometry to the passed point as\n   * {@link module:ol/coordinate~Coordinate coordinate}.\n   * @param {import(\"../coordinate.js\").Coordinate} point Point.\n   * @param {import(\"../coordinate.js\").Coordinate} [closestPoint] Closest point.\n   * @return {import(\"../coordinate.js\").Coordinate} Closest point.\n   * @api\n   */\n  getClosestPoint(point, closestPoint) {\n    closestPoint = closestPoint ? closestPoint : [NaN, NaN];\n    this.closestPointXY(point[0], point[1], closestPoint, Infinity);\n    return closestPoint;\n  }\n\n  /**\n   * Returns true if this geometry includes the specified coordinate. If the\n   * coordinate is on the boundary of the geometry, returns false.\n   * @param {import(\"../coordinate.js\").Coordinate} coordinate Coordinate.\n   * @return {boolean} Contains coordinate.\n   * @api\n   */\n  intersectsCoordinate(coordinate) {\n    return this.containsXY(coordinate[0], coordinate[1]);\n  }\n\n  /**\n   * @abstract\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @protected\n   * @return {import(\"../extent.js\").Extent} extent Extent.\n   */\n  computeExtent(extent) {\n    return abstract();\n  }\n\n  /**\n   * Get the extent of the geometry.\n   * @param {import(\"../extent.js\").Extent} [extent] Extent.\n   * @return {import(\"../extent.js\").Extent} extent Extent.\n   * @api\n   */\n  getExtent(extent) {\n    if (this.extentRevision_ != this.getRevision()) {\n      const extent = this.computeExtent(this.extent_);\n      if (isNaN(extent[0]) || isNaN(extent[1])) {\n        createOrUpdateEmpty(extent);\n      }\n      this.extentRevision_ = this.getRevision();\n    }\n    return returnOrUpdate(this.extent_, extent);\n  }\n\n  /**\n   * Rotate the geometry around a given coordinate. This modifies the geometry\n   * coordinates in place.\n   * @abstract\n   * @param {number} angle Rotation angle in radians.\n   * @param {import(\"../coordinate.js\").Coordinate} anchor The rotation center.\n   * @api\n   */\n  rotate(angle, anchor) {\n    abstract();\n  }\n\n  /**\n   * Scale the geometry (with an optional origin).  This modifies the geometry\n   * coordinates in place.\n   * @abstract\n   * @param {number} sx The scaling factor in the x-direction.\n   * @param {number} [sy] The scaling factor in the y-direction (defaults to sx).\n   * @param {import(\"../coordinate.js\").Coordinate} [anchor] The scale origin (defaults to the center\n   *     of the geometry extent).\n   * @api\n   */\n  scale(sx, sy, anchor) {\n    abstract();\n  }\n\n  /**\n   * Create a simplified version of this geometry.  For linestrings, this uses\n   * the [Douglas Peucker](https://en.wikipedia.org/wiki/Ramer-Douglas-Peucker_algorithm)\n   * algorithm.  For polygons, a quantization-based\n   * simplification is used to preserve topology.\n   * @param {number} tolerance The tolerance distance for simplification.\n   * @return {Geometry} A new, simplified version of the original geometry.\n   * @api\n   */\n  simplify(tolerance) {\n    return this.getSimplifiedGeometry(tolerance * tolerance);\n  }\n\n  /**\n   * Create a simplified version of this geometry using the Douglas Peucker\n   * algorithm.\n   * See https://en.wikipedia.org/wiki/Ramer-Douglas-Peucker_algorithm.\n   * @abstract\n   * @param {number} squaredTolerance Squared tolerance.\n   * @return {Geometry} Simplified geometry.\n   */\n  getSimplifiedGeometry(squaredTolerance) {\n    return abstract();\n  }\n\n  /**\n   * Get the type of this geometry.\n   * @abstract\n   * @return {Type} Geometry type.\n   */\n  getType() {\n    return abstract();\n  }\n\n  /**\n   * Apply a transform function to the coordinates of the geometry.\n   * The geometry is modified in place.\n   * If you do not want the geometry modified in place, first `clone()` it and\n   * then use this function on the clone.\n   * @abstract\n   * @param {import(\"../proj.js\").TransformFunction} transformFn Transform function.\n   * Called with a flat array of geometry coordinates.\n   */\n  applyTransform(transformFn) {\n    abstract();\n  }\n\n  /**\n   * Test if the geometry and the passed extent intersect.\n   * @abstract\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @return {boolean} `true` if the geometry and the extent intersect.\n   */\n  intersectsExtent(extent) {\n    return abstract();\n  }\n\n  /**\n   * Translate the geometry.  This modifies the geometry coordinates in place.  If\n   * instead you want a new geometry, first `clone()` this geometry.\n   * @abstract\n   * @param {number} deltaX Delta X.\n   * @param {number} deltaY Delta Y.\n   * @api\n   */\n  translate(deltaX, deltaY) {\n    abstract();\n  }\n\n  /**\n   * Transform each coordinate of the geometry from one coordinate reference\n   * system to another. The geometry is modified in place.\n   * For example, a line will be transformed to a line and a circle to a circle.\n   * If you do not want the geometry modified in place, first `clone()` it and\n   * then use this function on the clone.\n   *\n   * @param {import(\"../proj.js\").ProjectionLike} source The current projection.  Can be a\n   *     string identifier or a {@link module:ol/proj/Projection~Projection} object.\n   * @param {import(\"../proj.js\").ProjectionLike} destination The desired projection.  Can be a\n   *     string identifier or a {@link module:ol/proj/Projection~Projection} object.\n   * @return {Geometry} This geometry.  Note that original geometry is\n   *     modified in place.\n   * @api\n   */\n  transform(source, destination) {\n    /** @type {import(\"../proj/Projection.js\").default} */\n    const sourceProj = getProjection(source);\n    const transformFn =\n      sourceProj.getUnits() == 'tile-pixels'\n        ? function (inCoordinates, outCoordinates, stride) {\n            const pixelExtent = sourceProj.getExtent();\n            const projectedExtent = sourceProj.getWorldExtent();\n            const scale = getHeight(projectedExtent) / getHeight(pixelExtent);\n            composeTransform(\n              tmpTransform,\n              projectedExtent[0],\n              projectedExtent[3],\n              scale,\n              -scale,\n              0,\n              0,\n              0\n            );\n            transform2D(\n              inCoordinates,\n              0,\n              inCoordinates.length,\n              stride,\n              tmpTransform,\n              outCoordinates\n            );\n            return getTransform(sourceProj, destination)(\n              inCoordinates,\n              outCoordinates,\n              stride\n            );\n          }\n        : getTransform(sourceProj, destination);\n    this.applyTransform(transformFn);\n    return this;\n  }\n}\n\nexport default Geometry;\n","/**\n * @module ol/geom/SimpleGeometry\n */\nimport Geometry from './Geometry.js';\nimport {abstract} from '../util.js';\nimport {createOrUpdateFromFlatCoordinates, getCenter} from '../extent.js';\nimport {rotate, scale, transform2D, translate} from './flat/transform.js';\n\n/**\n * @classdesc\n * Abstract base class; only used for creating subclasses; do not instantiate\n * in apps, as cannot be rendered.\n *\n * @abstract\n * @api\n */\nclass SimpleGeometry extends Geometry {\n  constructor() {\n    super();\n\n    /**\n     * @protected\n     * @type {import(\"./Geometry.js\").GeometryLayout}\n     */\n    this.layout = 'XY';\n\n    /**\n     * @protected\n     * @type {number}\n     */\n    this.stride = 2;\n\n    /**\n     * @protected\n     * @type {Array<number>}\n     */\n    this.flatCoordinates = null;\n  }\n\n  /**\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @protected\n   * @return {import(\"../extent.js\").Extent} extent Extent.\n   */\n  computeExtent(extent) {\n    return createOrUpdateFromFlatCoordinates(\n      this.flatCoordinates,\n      0,\n      this.flatCoordinates.length,\n      this.stride,\n      extent\n    );\n  }\n\n  /**\n   * @abstract\n   * @return {Array<*> | null} Coordinates.\n   */\n  getCoordinates() {\n    return abstract();\n  }\n\n  /**\n   * Return the first coordinate of the geometry.\n   * @return {import(\"../coordinate.js\").Coordinate} First coordinate.\n   * @api\n   */\n  getFirstCoordinate() {\n    return this.flatCoordinates.slice(0, this.stride);\n  }\n\n  /**\n   * @return {Array<number>} Flat coordinates.\n   */\n  getFlatCoordinates() {\n    return this.flatCoordinates;\n  }\n\n  /**\n   * Return the last coordinate of the geometry.\n   * @return {import(\"../coordinate.js\").Coordinate} Last point.\n   * @api\n   */\n  getLastCoordinate() {\n    return this.flatCoordinates.slice(\n      this.flatCoordinates.length - this.stride\n    );\n  }\n\n  /**\n   * Return the {@link import(\"./Geometry.js\").GeometryLayout layout} of the geometry.\n   * @return {import(\"./Geometry.js\").GeometryLayout} Layout.\n   * @api\n   */\n  getLayout() {\n    return this.layout;\n  }\n\n  /**\n   * Create a simplified version of this geometry using the Douglas Peucker algorithm.\n   * @param {number} squaredTolerance Squared tolerance.\n   * @return {SimpleGeometry} Simplified geometry.\n   */\n  getSimplifiedGeometry(squaredTolerance) {\n    if (this.simplifiedGeometryRevision !== this.getRevision()) {\n      this.simplifiedGeometryMaxMinSquaredTolerance = 0;\n      this.simplifiedGeometryRevision = this.getRevision();\n    }\n    // If squaredTolerance is negative or if we know that simplification will not\n    // have any effect then just return this.\n    if (\n      squaredTolerance < 0 ||\n      (this.simplifiedGeometryMaxMinSquaredTolerance !== 0 &&\n        squaredTolerance <= this.simplifiedGeometryMaxMinSquaredTolerance)\n    ) {\n      return this;\n    }\n\n    const simplifiedGeometry =\n      this.getSimplifiedGeometryInternal(squaredTolerance);\n    const simplifiedFlatCoordinates = simplifiedGeometry.getFlatCoordinates();\n    if (simplifiedFlatCoordinates.length < this.flatCoordinates.length) {\n      return simplifiedGeometry;\n    }\n    // Simplification did not actually remove any coordinates.  We now know\n    // that any calls to getSimplifiedGeometry with a squaredTolerance less\n    // than or equal to the current squaredTolerance will also not have any\n    // effect.  This allows us to short circuit simplification (saving CPU\n    // cycles) and prevents the cache of simplified geometries from filling\n    // up with useless identical copies of this geometry (saving memory).\n    this.simplifiedGeometryMaxMinSquaredTolerance = squaredTolerance;\n    return this;\n  }\n\n  /**\n   * @param {number} squaredTolerance Squared tolerance.\n   * @return {SimpleGeometry} Simplified geometry.\n   * @protected\n   */\n  getSimplifiedGeometryInternal(squaredTolerance) {\n    return this;\n  }\n\n  /**\n   * @return {number} Stride.\n   */\n  getStride() {\n    return this.stride;\n  }\n\n  /**\n   * @param {import(\"./Geometry.js\").GeometryLayout} layout Layout.\n   * @param {Array<number>} flatCoordinates Flat coordinates.\n   */\n  setFlatCoordinates(layout, flatCoordinates) {\n    this.stride = getStrideForLayout(layout);\n    this.layout = layout;\n    this.flatCoordinates = flatCoordinates;\n  }\n\n  /**\n   * @abstract\n   * @param {!Array<*>} coordinates Coordinates.\n   * @param {import(\"./Geometry.js\").GeometryLayout} [layout] Layout.\n   */\n  setCoordinates(coordinates, layout) {\n    abstract();\n  }\n\n  /**\n   * @param {import(\"./Geometry.js\").GeometryLayout|undefined} layout Layout.\n   * @param {Array<*>} coordinates Coordinates.\n   * @param {number} nesting Nesting.\n   * @protected\n   */\n  setLayout(layout, coordinates, nesting) {\n    /** @type {number} */\n    let stride;\n    if (layout) {\n      stride = getStrideForLayout(layout);\n    } else {\n      for (let i = 0; i < nesting; ++i) {\n        if (coordinates.length === 0) {\n          this.layout = 'XY';\n          this.stride = 2;\n          return;\n        }\n        coordinates = /** @type {Array} */ (coordinates[0]);\n      }\n      stride = coordinates.length;\n      layout = getLayoutForStride(stride);\n    }\n    this.layout = layout;\n    this.stride = stride;\n  }\n\n  /**\n   * Apply a transform function to the coordinates of the geometry.\n   * The geometry is modified in place.\n   * If you do not want the geometry modified in place, first `clone()` it and\n   * then use this function on the clone.\n   * @param {import(\"../proj.js\").TransformFunction} transformFn Transform function.\n   * Called with a flat array of geometry coordinates.\n   * @api\n   */\n  applyTransform(transformFn) {\n    if (this.flatCoordinates) {\n      transformFn(this.flatCoordinates, this.flatCoordinates, this.stride);\n      this.changed();\n    }\n  }\n\n  /**\n   * Rotate the geometry around a given coordinate. This modifies the geometry\n   * coordinates in place.\n   * @param {number} angle Rotation angle in counter-clockwise radians.\n   * @param {import(\"../coordinate.js\").Coordinate} anchor The rotation center.\n   * @api\n   */\n  rotate(angle, anchor) {\n    const flatCoordinates = this.getFlatCoordinates();\n    if (flatCoordinates) {\n      const stride = this.getStride();\n      rotate(\n        flatCoordinates,\n        0,\n        flatCoordinates.length,\n        stride,\n        angle,\n        anchor,\n        flatCoordinates\n      );\n      this.changed();\n    }\n  }\n\n  /**\n   * Scale the geometry (with an optional origin).  This modifies the geometry\n   * coordinates in place.\n   * @param {number} sx The scaling factor in the x-direction.\n   * @param {number} [sy] The scaling factor in the y-direction (defaults to sx).\n   * @param {import(\"../coordinate.js\").Coordinate} [anchor] The scale origin (defaults to the center\n   *     of the geometry extent).\n   * @api\n   */\n  scale(sx, sy, anchor) {\n    if (sy === undefined) {\n      sy = sx;\n    }\n    if (!anchor) {\n      anchor = getCenter(this.getExtent());\n    }\n    const flatCoordinates = this.getFlatCoordinates();\n    if (flatCoordinates) {\n      const stride = this.getStride();\n      scale(\n        flatCoordinates,\n        0,\n        flatCoordinates.length,\n        stride,\n        sx,\n        sy,\n        anchor,\n        flatCoordinates\n      );\n      this.changed();\n    }\n  }\n\n  /**\n   * Translate the geometry.  This modifies the geometry coordinates in place.  If\n   * instead you want a new geometry, first `clone()` this geometry.\n   * @param {number} deltaX Delta X.\n   * @param {number} deltaY Delta Y.\n   * @api\n   */\n  translate(deltaX, deltaY) {\n    const flatCoordinates = this.getFlatCoordinates();\n    if (flatCoordinates) {\n      const stride = this.getStride();\n      translate(\n        flatCoordinates,\n        0,\n        flatCoordinates.length,\n        stride,\n        deltaX,\n        deltaY,\n        flatCoordinates\n      );\n      this.changed();\n    }\n  }\n}\n\n/**\n * @param {number} stride Stride.\n * @return {import(\"./Geometry.js\").GeometryLayout} layout Layout.\n */\nfunction getLayoutForStride(stride) {\n  let layout;\n  if (stride == 2) {\n    layout = 'XY';\n  } else if (stride == 3) {\n    layout = 'XYZ';\n  } else if (stride == 4) {\n    layout = 'XYZM';\n  }\n  return /** @type {import(\"./Geometry.js\").GeometryLayout} */ (layout);\n}\n\n/**\n * @param {import(\"./Geometry.js\").GeometryLayout} layout Layout.\n * @return {number} Stride.\n */\nexport function getStrideForLayout(layout) {\n  let stride;\n  if (layout == 'XY') {\n    stride = 2;\n  } else if (layout == 'XYZ' || layout == 'XYM') {\n    stride = 3;\n  } else if (layout == 'XYZM') {\n    stride = 4;\n  }\n  return /** @type {number} */ (stride);\n}\n\n/**\n * @param {SimpleGeometry} simpleGeometry Simple geometry.\n * @param {import(\"../transform.js\").Transform} transform Transform.\n * @param {Array<number>} [dest] Destination.\n * @return {Array<number>} Transformed flat coordinates.\n */\nexport function transformGeom2D(simpleGeometry, transform, dest) {\n  const flatCoordinates = simpleGeometry.getFlatCoordinates();\n  if (!flatCoordinates) {\n    return null;\n  }\n  const stride = simpleGeometry.getStride();\n  return transform2D(\n    flatCoordinates,\n    0,\n    flatCoordinates.length,\n    stride,\n    transform,\n    dest\n  );\n}\n\nexport default SimpleGeometry;\n","/**\n * @module ol/geom/flat/closest\n */\nimport {lerp, squaredDistance as squaredDx} from '../../math.js';\n\n/**\n * Returns the point on the 2D line segment flatCoordinates[offset1] to\n * flatCoordinates[offset2] that is closest to the point (x, y).  Extra\n * dimensions are linearly interpolated.\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset1 Offset 1.\n * @param {number} offset2 Offset 2.\n * @param {number} stride Stride.\n * @param {number} x X.\n * @param {number} y Y.\n * @param {Array<number>} closestPoint Closest point.\n */\nfunction assignClosest(\n  flatCoordinates,\n  offset1,\n  offset2,\n  stride,\n  x,\n  y,\n  closestPoint\n) {\n  const x1 = flatCoordinates[offset1];\n  const y1 = flatCoordinates[offset1 + 1];\n  const dx = flatCoordinates[offset2] - x1;\n  const dy = flatCoordinates[offset2 + 1] - y1;\n  let offset;\n  if (dx === 0 && dy === 0) {\n    offset = offset1;\n  } else {\n    const t = ((x - x1) * dx + (y - y1) * dy) / (dx * dx + dy * dy);\n    if (t > 1) {\n      offset = offset2;\n    } else if (t > 0) {\n      for (let i = 0; i < stride; ++i) {\n        closestPoint[i] = lerp(\n          flatCoordinates[offset1 + i],\n          flatCoordinates[offset2 + i],\n          t\n        );\n      }\n      closestPoint.length = stride;\n      return;\n    } else {\n      offset = offset1;\n    }\n  }\n  for (let i = 0; i < stride; ++i) {\n    closestPoint[i] = flatCoordinates[offset + i];\n  }\n  closestPoint.length = stride;\n}\n\n/**\n * Return the squared of the largest distance between any pair of consecutive\n * coordinates.\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} max Max squared delta.\n * @return {number} Max squared delta.\n */\nexport function maxSquaredDelta(flatCoordinates, offset, end, stride, max) {\n  let x1 = flatCoordinates[offset];\n  let y1 = flatCoordinates[offset + 1];\n  for (offset += stride; offset < end; offset += stride) {\n    const x2 = flatCoordinates[offset];\n    const y2 = flatCoordinates[offset + 1];\n    const squaredDelta = squaredDx(x1, y1, x2, y2);\n    if (squaredDelta > max) {\n      max = squaredDelta;\n    }\n    x1 = x2;\n    y1 = y2;\n  }\n  return max;\n}\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<number>} ends Ends.\n * @param {number} stride Stride.\n * @param {number} max Max squared delta.\n * @return {number} Max squared delta.\n */\nexport function arrayMaxSquaredDelta(\n  flatCoordinates,\n  offset,\n  ends,\n  stride,\n  max\n) {\n  for (let i = 0, ii = ends.length; i < ii; ++i) {\n    const end = ends[i];\n    max = maxSquaredDelta(flatCoordinates, offset, end, stride, max);\n    offset = end;\n  }\n  return max;\n}\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<Array<number>>} endss Endss.\n * @param {number} stride Stride.\n * @param {number} max Max squared delta.\n * @return {number} Max squared delta.\n */\nexport function multiArrayMaxSquaredDelta(\n  flatCoordinates,\n  offset,\n  endss,\n  stride,\n  max\n) {\n  for (let i = 0, ii = endss.length; i < ii; ++i) {\n    const ends = endss[i];\n    max = arrayMaxSquaredDelta(flatCoordinates, offset, ends, stride, max);\n    offset = ends[ends.length - 1];\n  }\n  return max;\n}\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} maxDelta Max delta.\n * @param {boolean} isRing Is ring.\n * @param {number} x X.\n * @param {number} y Y.\n * @param {Array<number>} closestPoint Closest point.\n * @param {number} minSquaredDistance Minimum squared distance.\n * @param {Array<number>} [tmpPoint] Temporary point object.\n * @return {number} Minimum squared distance.\n */\nexport function assignClosestPoint(\n  flatCoordinates,\n  offset,\n  end,\n  stride,\n  maxDelta,\n  isRing,\n  x,\n  y,\n  closestPoint,\n  minSquaredDistance,\n  tmpPoint\n) {\n  if (offset == end) {\n    return minSquaredDistance;\n  }\n  let i, squaredDistance;\n  if (maxDelta === 0) {\n    // All points are identical, so just test the first point.\n    squaredDistance = squaredDx(\n      x,\n      y,\n      flatCoordinates[offset],\n      flatCoordinates[offset + 1]\n    );\n    if (squaredDistance < minSquaredDistance) {\n      for (i = 0; i < stride; ++i) {\n        closestPoint[i] = flatCoordinates[offset + i];\n      }\n      closestPoint.length = stride;\n      return squaredDistance;\n    }\n    return minSquaredDistance;\n  }\n  tmpPoint = tmpPoint ? tmpPoint : [NaN, NaN];\n  let index = offset + stride;\n  while (index < end) {\n    assignClosest(\n      flatCoordinates,\n      index - stride,\n      index,\n      stride,\n      x,\n      y,\n      tmpPoint\n    );\n    squaredDistance = squaredDx(x, y, tmpPoint[0], tmpPoint[1]);\n    if (squaredDistance < minSquaredDistance) {\n      minSquaredDistance = squaredDistance;\n      for (i = 0; i < stride; ++i) {\n        closestPoint[i] = tmpPoint[i];\n      }\n      closestPoint.length = stride;\n      index += stride;\n    } else {\n      // Skip ahead multiple points, because we know that all the skipped\n      // points cannot be any closer than the closest point we have found so\n      // far.  We know this because we know how close the current point is, how\n      // close the closest point we have found so far is, and the maximum\n      // distance between consecutive points.  For example, if we're currently\n      // at distance 10, the best we've found so far is 3, and that the maximum\n      // distance between consecutive points is 2, then we'll need to skip at\n      // least (10 - 3) / 2 == 3 (rounded down) points to have any chance of\n      // finding a closer point.  We use Math.max(..., 1) to ensure that we\n      // always advance at least one point, to avoid an infinite loop.\n      index +=\n        stride *\n        Math.max(\n          ((Math.sqrt(squaredDistance) - Math.sqrt(minSquaredDistance)) /\n            maxDelta) |\n            0,\n          1\n        );\n    }\n  }\n  if (isRing) {\n    // Check the closing segment.\n    assignClosest(\n      flatCoordinates,\n      end - stride,\n      offset,\n      stride,\n      x,\n      y,\n      tmpPoint\n    );\n    squaredDistance = squaredDx(x, y, tmpPoint[0], tmpPoint[1]);\n    if (squaredDistance < minSquaredDistance) {\n      minSquaredDistance = squaredDistance;\n      for (i = 0; i < stride; ++i) {\n        closestPoint[i] = tmpPoint[i];\n      }\n      closestPoint.length = stride;\n    }\n  }\n  return minSquaredDistance;\n}\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<number>} ends Ends.\n * @param {number} stride Stride.\n * @param {number} maxDelta Max delta.\n * @param {boolean} isRing Is ring.\n * @param {number} x X.\n * @param {number} y Y.\n * @param {Array<number>} closestPoint Closest point.\n * @param {number} minSquaredDistance Minimum squared distance.\n * @param {Array<number>} [tmpPoint] Temporary point object.\n * @return {number} Minimum squared distance.\n */\nexport function assignClosestArrayPoint(\n  flatCoordinates,\n  offset,\n  ends,\n  stride,\n  maxDelta,\n  isRing,\n  x,\n  y,\n  closestPoint,\n  minSquaredDistance,\n  tmpPoint\n) {\n  tmpPoint = tmpPoint ? tmpPoint : [NaN, NaN];\n  for (let i = 0, ii = ends.length; i < ii; ++i) {\n    const end = ends[i];\n    minSquaredDistance = assignClosestPoint(\n      flatCoordinates,\n      offset,\n      end,\n      stride,\n      maxDelta,\n      isRing,\n      x,\n      y,\n      closestPoint,\n      minSquaredDistance,\n      tmpPoint\n    );\n    offset = end;\n  }\n  return minSquaredDistance;\n}\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<Array<number>>} endss Endss.\n * @param {number} stride Stride.\n * @param {number} maxDelta Max delta.\n * @param {boolean} isRing Is ring.\n * @param {number} x X.\n * @param {number} y Y.\n * @param {Array<number>} closestPoint Closest point.\n * @param {number} minSquaredDistance Minimum squared distance.\n * @param {Array<number>} [tmpPoint] Temporary point object.\n * @return {number} Minimum squared distance.\n */\nexport function assignClosestMultiArrayPoint(\n  flatCoordinates,\n  offset,\n  endss,\n  stride,\n  maxDelta,\n  isRing,\n  x,\n  y,\n  closestPoint,\n  minSquaredDistance,\n  tmpPoint\n) {\n  tmpPoint = tmpPoint ? tmpPoint : [NaN, NaN];\n  for (let i = 0, ii = endss.length; i < ii; ++i) {\n    const ends = endss[i];\n    minSquaredDistance = assignClosestArrayPoint(\n      flatCoordinates,\n      offset,\n      ends,\n      stride,\n      maxDelta,\n      isRing,\n      x,\n      y,\n      closestPoint,\n      minSquaredDistance,\n      tmpPoint\n    );\n    offset = ends[ends.length - 1];\n  }\n  return minSquaredDistance;\n}\n","/**\n * @module ol/geom/flat/deflate\n */\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {import(\"../../coordinate.js\").Coordinate} coordinate Coordinate.\n * @param {number} stride Stride.\n * @return {number} offset Offset.\n */\nexport function deflateCoordinate(flatCoordinates, offset, coordinate, stride) {\n  for (let i = 0, ii = coordinate.length; i < ii; ++i) {\n    flatCoordinates[offset++] = coordinate[i];\n  }\n  return offset;\n}\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<import(\"../../coordinate.js\").Coordinate>} coordinates Coordinates.\n * @param {number} stride Stride.\n * @return {number} offset Offset.\n */\nexport function deflateCoordinates(\n  flatCoordinates,\n  offset,\n  coordinates,\n  stride\n) {\n  for (let i = 0, ii = coordinates.length; i < ii; ++i) {\n    const coordinate = coordinates[i];\n    for (let j = 0; j < stride; ++j) {\n      flatCoordinates[offset++] = coordinate[j];\n    }\n  }\n  return offset;\n}\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<Array<import(\"../../coordinate.js\").Coordinate>>} coordinatess Coordinatess.\n * @param {number} stride Stride.\n * @param {Array<number>} [ends] Ends.\n * @return {Array<number>} Ends.\n */\nexport function deflateCoordinatesArray(\n  flatCoordinates,\n  offset,\n  coordinatess,\n  stride,\n  ends\n) {\n  ends = ends ? ends : [];\n  let i = 0;\n  for (let j = 0, jj = coordinatess.length; j < jj; ++j) {\n    const end = deflateCoordinates(\n      flatCoordinates,\n      offset,\n      coordinatess[j],\n      stride\n    );\n    ends[i++] = end;\n    offset = end;\n  }\n  ends.length = i;\n  return ends;\n}\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<Array<Array<import(\"../../coordinate.js\").Coordinate>>>} coordinatesss Coordinatesss.\n * @param {number} stride Stride.\n * @param {Array<Array<number>>} [endss] Endss.\n * @return {Array<Array<number>>} Endss.\n */\nexport function deflateMultiCoordinatesArray(\n  flatCoordinates,\n  offset,\n  coordinatesss,\n  stride,\n  endss\n) {\n  endss = endss ? endss : [];\n  let i = 0;\n  for (let j = 0, jj = coordinatesss.length; j < jj; ++j) {\n    const ends = deflateCoordinatesArray(\n      flatCoordinates,\n      offset,\n      coordinatesss[j],\n      stride,\n      endss[i]\n    );\n    if (ends.length === 0) {\n      ends[0] = offset;\n    }\n    endss[i++] = ends;\n    offset = ends[ends.length - 1];\n  }\n  endss.length = i;\n  return endss;\n}\n","/**\n * @module ol/geom/flat/simplify\n */\n// Based on simplify-js https://github.com/mourner/simplify-js\n// Copyright (c) 2012, Vladimir Agafonkin\n// All rights reserved.\n//\n// Redistribution and use in source and binary forms, with or without\n// modification, are permitted provided that the following conditions are met:\n//\n//    1. Redistributions of source code must retain the above copyright notice,\n//       this list of conditions and the following disclaimer.\n//\n//    2. Redistributions in binary form must reproduce the above copyright\n//       notice, this list of conditions and the following disclaimer in the\n//       documentation and/or other materials provided with the distribution.\n//\n// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS \"AS IS\"\n// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE\n// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE\n// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE\n// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR\n// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF\n// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS\n// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN\n// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)\n// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE\n// POSSIBILITY OF SUCH DAMAGE.\n\nimport {squaredDistance, squaredSegmentDistance} from '../../math.js';\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} squaredTolerance Squared tolerance.\n * @param {boolean} highQuality Highest quality.\n * @param {Array<number>} [simplifiedFlatCoordinates] Simplified flat\n *     coordinates.\n * @return {Array<number>} Simplified line string.\n */\nexport function simplifyLineString(\n  flatCoordinates,\n  offset,\n  end,\n  stride,\n  squaredTolerance,\n  highQuality,\n  simplifiedFlatCoordinates\n) {\n  simplifiedFlatCoordinates =\n    simplifiedFlatCoordinates !== undefined ? simplifiedFlatCoordinates : [];\n  if (!highQuality) {\n    end = radialDistance(\n      flatCoordinates,\n      offset,\n      end,\n      stride,\n      squaredTolerance,\n      simplifiedFlatCoordinates,\n      0\n    );\n    flatCoordinates = simplifiedFlatCoordinates;\n    offset = 0;\n    stride = 2;\n  }\n  simplifiedFlatCoordinates.length = douglasPeucker(\n    flatCoordinates,\n    offset,\n    end,\n    stride,\n    squaredTolerance,\n    simplifiedFlatCoordinates,\n    0\n  );\n  return simplifiedFlatCoordinates;\n}\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} squaredTolerance Squared tolerance.\n * @param {Array<number>} simplifiedFlatCoordinates Simplified flat\n *     coordinates.\n * @param {number} simplifiedOffset Simplified offset.\n * @return {number} Simplified offset.\n */\nexport function douglasPeucker(\n  flatCoordinates,\n  offset,\n  end,\n  stride,\n  squaredTolerance,\n  simplifiedFlatCoordinates,\n  simplifiedOffset\n) {\n  const n = (end - offset) / stride;\n  if (n < 3) {\n    for (; offset < end; offset += stride) {\n      simplifiedFlatCoordinates[simplifiedOffset++] = flatCoordinates[offset];\n      simplifiedFlatCoordinates[simplifiedOffset++] =\n        flatCoordinates[offset + 1];\n    }\n    return simplifiedOffset;\n  }\n  /** @type {Array<number>} */\n  const markers = new Array(n);\n  markers[0] = 1;\n  markers[n - 1] = 1;\n  /** @type {Array<number>} */\n  const stack = [offset, end - stride];\n  let index = 0;\n  while (stack.length > 0) {\n    const last = stack.pop();\n    const first = stack.pop();\n    let maxSquaredDistance = 0;\n    const x1 = flatCoordinates[first];\n    const y1 = flatCoordinates[first + 1];\n    const x2 = flatCoordinates[last];\n    const y2 = flatCoordinates[last + 1];\n    for (let i = first + stride; i < last; i += stride) {\n      const x = flatCoordinates[i];\n      const y = flatCoordinates[i + 1];\n      const squaredDistance = squaredSegmentDistance(x, y, x1, y1, x2, y2);\n      if (squaredDistance > maxSquaredDistance) {\n        index = i;\n        maxSquaredDistance = squaredDistance;\n      }\n    }\n    if (maxSquaredDistance > squaredTolerance) {\n      markers[(index - offset) / stride] = 1;\n      if (first + stride < index) {\n        stack.push(first, index);\n      }\n      if (index + stride < last) {\n        stack.push(index, last);\n      }\n    }\n  }\n  for (let i = 0; i < n; ++i) {\n    if (markers[i]) {\n      simplifiedFlatCoordinates[simplifiedOffset++] =\n        flatCoordinates[offset + i * stride];\n      simplifiedFlatCoordinates[simplifiedOffset++] =\n        flatCoordinates[offset + i * stride + 1];\n    }\n  }\n  return simplifiedOffset;\n}\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<number>} ends Ends.\n * @param {number} stride Stride.\n * @param {number} squaredTolerance Squared tolerance.\n * @param {Array<number>} simplifiedFlatCoordinates Simplified flat\n *     coordinates.\n * @param {number} simplifiedOffset Simplified offset.\n * @param {Array<number>} simplifiedEnds Simplified ends.\n * @return {number} Simplified offset.\n */\nexport function douglasPeuckerArray(\n  flatCoordinates,\n  offset,\n  ends,\n  stride,\n  squaredTolerance,\n  simplifiedFlatCoordinates,\n  simplifiedOffset,\n  simplifiedEnds\n) {\n  for (let i = 0, ii = ends.length; i < ii; ++i) {\n    const end = ends[i];\n    simplifiedOffset = douglasPeucker(\n      flatCoordinates,\n      offset,\n      end,\n      stride,\n      squaredTolerance,\n      simplifiedFlatCoordinates,\n      simplifiedOffset\n    );\n    simplifiedEnds.push(simplifiedOffset);\n    offset = end;\n  }\n  return simplifiedOffset;\n}\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<Array<number>>} endss Endss.\n * @param {number} stride Stride.\n * @param {number} squaredTolerance Squared tolerance.\n * @param {Array<number>} simplifiedFlatCoordinates Simplified flat\n *     coordinates.\n * @param {number} simplifiedOffset Simplified offset.\n * @param {Array<Array<number>>} simplifiedEndss Simplified endss.\n * @return {number} Simplified offset.\n */\nexport function douglasPeuckerMultiArray(\n  flatCoordinates,\n  offset,\n  endss,\n  stride,\n  squaredTolerance,\n  simplifiedFlatCoordinates,\n  simplifiedOffset,\n  simplifiedEndss\n) {\n  for (let i = 0, ii = endss.length; i < ii; ++i) {\n    const ends = endss[i];\n    const simplifiedEnds = [];\n    simplifiedOffset = douglasPeuckerArray(\n      flatCoordinates,\n      offset,\n      ends,\n      stride,\n      squaredTolerance,\n      simplifiedFlatCoordinates,\n      simplifiedOffset,\n      simplifiedEnds\n    );\n    simplifiedEndss.push(simplifiedEnds);\n    offset = ends[ends.length - 1];\n  }\n  return simplifiedOffset;\n}\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} squaredTolerance Squared tolerance.\n * @param {Array<number>} simplifiedFlatCoordinates Simplified flat\n *     coordinates.\n * @param {number} simplifiedOffset Simplified offset.\n * @return {number} Simplified offset.\n */\nexport function radialDistance(\n  flatCoordinates,\n  offset,\n  end,\n  stride,\n  squaredTolerance,\n  simplifiedFlatCoordinates,\n  simplifiedOffset\n) {\n  if (end <= offset + stride) {\n    // zero or one point, no simplification possible, so copy and return\n    for (; offset < end; offset += stride) {\n      simplifiedFlatCoordinates[simplifiedOffset++] = flatCoordinates[offset];\n      simplifiedFlatCoordinates[simplifiedOffset++] =\n        flatCoordinates[offset + 1];\n    }\n    return simplifiedOffset;\n  }\n  let x1 = flatCoordinates[offset];\n  let y1 = flatCoordinates[offset + 1];\n  // copy first point\n  simplifiedFlatCoordinates[simplifiedOffset++] = x1;\n  simplifiedFlatCoordinates[simplifiedOffset++] = y1;\n  let x2 = x1;\n  let y2 = y1;\n  for (offset += stride; offset < end; offset += stride) {\n    x2 = flatCoordinates[offset];\n    y2 = flatCoordinates[offset + 1];\n    if (squaredDistance(x1, y1, x2, y2) > squaredTolerance) {\n      // copy point at offset\n      simplifiedFlatCoordinates[simplifiedOffset++] = x2;\n      simplifiedFlatCoordinates[simplifiedOffset++] = y2;\n      x1 = x2;\n      y1 = y2;\n    }\n  }\n  if (x2 != x1 || y2 != y1) {\n    // copy last point\n    simplifiedFlatCoordinates[simplifiedOffset++] = x2;\n    simplifiedFlatCoordinates[simplifiedOffset++] = y2;\n  }\n  return simplifiedOffset;\n}\n\n/**\n * @param {number} value Value.\n * @param {number} tolerance Tolerance.\n * @return {number} Rounded value.\n */\nexport function snap(value, tolerance) {\n  return tolerance * Math.round(value / tolerance);\n}\n\n/**\n * Simplifies a line string using an algorithm designed by Tim Schaub.\n * Coordinates are snapped to the nearest value in a virtual grid and\n * consecutive duplicate coordinates are discarded.  This effectively preserves\n * topology as the simplification of any subsection of a line string is\n * independent of the rest of the line string.  This means that, for examples,\n * the common edge between two polygons will be simplified to the same line\n * string independently in both polygons.  This implementation uses a single\n * pass over the coordinates and eliminates intermediate collinear points.\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} tolerance Tolerance.\n * @param {Array<number>} simplifiedFlatCoordinates Simplified flat\n *     coordinates.\n * @param {number} simplifiedOffset Simplified offset.\n * @return {number} Simplified offset.\n */\nexport function quantize(\n  flatCoordinates,\n  offset,\n  end,\n  stride,\n  tolerance,\n  simplifiedFlatCoordinates,\n  simplifiedOffset\n) {\n  // do nothing if the line is empty\n  if (offset == end) {\n    return simplifiedOffset;\n  }\n  // snap the first coordinate (P1)\n  let x1 = snap(flatCoordinates[offset], tolerance);\n  let y1 = snap(flatCoordinates[offset + 1], tolerance);\n  offset += stride;\n  // add the first coordinate to the output\n  simplifiedFlatCoordinates[simplifiedOffset++] = x1;\n  simplifiedFlatCoordinates[simplifiedOffset++] = y1;\n  // find the next coordinate that does not snap to the same value as the first\n  // coordinate (P2)\n  let x2, y2;\n  do {\n    x2 = snap(flatCoordinates[offset], tolerance);\n    y2 = snap(flatCoordinates[offset + 1], tolerance);\n    offset += stride;\n    if (offset == end) {\n      // all coordinates snap to the same value, the line collapses to a point\n      // push the last snapped value anyway to ensure that the output contains\n      // at least two points\n      // FIXME should we really return at least two points anyway?\n      simplifiedFlatCoordinates[simplifiedOffset++] = x2;\n      simplifiedFlatCoordinates[simplifiedOffset++] = y2;\n      return simplifiedOffset;\n    }\n  } while (x2 == x1 && y2 == y1);\n  while (offset < end) {\n    // snap the next coordinate (P3)\n    const x3 = snap(flatCoordinates[offset], tolerance);\n    const y3 = snap(flatCoordinates[offset + 1], tolerance);\n    offset += stride;\n    // skip P3 if it is equal to P2\n    if (x3 == x2 && y3 == y2) {\n      continue;\n    }\n    // calculate the delta between P1 and P2\n    const dx1 = x2 - x1;\n    const dy1 = y2 - y1;\n    // calculate the delta between P3 and P1\n    const dx2 = x3 - x1;\n    const dy2 = y3 - y1;\n    // if P1, P2, and P3 are colinear and P3 is further from P1 than P2 is from\n    // P1 in the same direction then P2 is on the straight line between P1 and\n    // P3\n    if (\n      dx1 * dy2 == dy1 * dx2 &&\n      ((dx1 < 0 && dx2 < dx1) || dx1 == dx2 || (dx1 > 0 && dx2 > dx1)) &&\n      ((dy1 < 0 && dy2 < dy1) || dy1 == dy2 || (dy1 > 0 && dy2 > dy1))\n    ) {\n      // discard P2 and set P2 = P3\n      x2 = x3;\n      y2 = y3;\n      continue;\n    }\n    // either P1, P2, and P3 are not colinear, or they are colinear but P3 is\n    // between P3 and P1 or on the opposite half of the line to P2.  add P2,\n    // and continue with P1 = P2 and P2 = P3\n    simplifiedFlatCoordinates[simplifiedOffset++] = x2;\n    simplifiedFlatCoordinates[simplifiedOffset++] = y2;\n    x1 = x2;\n    y1 = y2;\n    x2 = x3;\n    y2 = y3;\n  }\n  // add the last point (P2)\n  simplifiedFlatCoordinates[simplifiedOffset++] = x2;\n  simplifiedFlatCoordinates[simplifiedOffset++] = y2;\n  return simplifiedOffset;\n}\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<number>} ends Ends.\n * @param {number} stride Stride.\n * @param {number} tolerance Tolerance.\n * @param {Array<number>} simplifiedFlatCoordinates Simplified flat\n *     coordinates.\n * @param {number} simplifiedOffset Simplified offset.\n * @param {Array<number>} simplifiedEnds Simplified ends.\n * @return {number} Simplified offset.\n */\nexport function quantizeArray(\n  flatCoordinates,\n  offset,\n  ends,\n  stride,\n  tolerance,\n  simplifiedFlatCoordinates,\n  simplifiedOffset,\n  simplifiedEnds\n) {\n  for (let i = 0, ii = ends.length; i < ii; ++i) {\n    const end = ends[i];\n    simplifiedOffset = quantize(\n      flatCoordinates,\n      offset,\n      end,\n      stride,\n      tolerance,\n      simplifiedFlatCoordinates,\n      simplifiedOffset\n    );\n    simplifiedEnds.push(simplifiedOffset);\n    offset = end;\n  }\n  return simplifiedOffset;\n}\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<Array<number>>} endss Endss.\n * @param {number} stride Stride.\n * @param {number} tolerance Tolerance.\n * @param {Array<number>} simplifiedFlatCoordinates Simplified flat\n *     coordinates.\n * @param {number} simplifiedOffset Simplified offset.\n * @param {Array<Array<number>>} simplifiedEndss Simplified endss.\n * @return {number} Simplified offset.\n */\nexport function quantizeMultiArray(\n  flatCoordinates,\n  offset,\n  endss,\n  stride,\n  tolerance,\n  simplifiedFlatCoordinates,\n  simplifiedOffset,\n  simplifiedEndss\n) {\n  for (let i = 0, ii = endss.length; i < ii; ++i) {\n    const ends = endss[i];\n    const simplifiedEnds = [];\n    simplifiedOffset = quantizeArray(\n      flatCoordinates,\n      offset,\n      ends,\n      stride,\n      tolerance,\n      simplifiedFlatCoordinates,\n      simplifiedOffset,\n      simplifiedEnds\n    );\n    simplifiedEndss.push(simplifiedEnds);\n    offset = ends[ends.length - 1];\n  }\n  return simplifiedOffset;\n}\n","/**\n * @module ol/geom/flat/inflate\n */\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {Array<import(\"../../coordinate.js\").Coordinate>} [coordinates] Coordinates.\n * @return {Array<import(\"../../coordinate.js\").Coordinate>} Coordinates.\n */\nexport function inflateCoordinates(\n  flatCoordinates,\n  offset,\n  end,\n  stride,\n  coordinates\n) {\n  coordinates = coordinates !== undefined ? coordinates : [];\n  let i = 0;\n  for (let j = offset; j < end; j += stride) {\n    coordinates[i++] = flatCoordinates.slice(j, j + stride);\n  }\n  coordinates.length = i;\n  return coordinates;\n}\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<number>} ends Ends.\n * @param {number} stride Stride.\n * @param {Array<Array<import(\"../../coordinate.js\").Coordinate>>} [coordinatess] Coordinatess.\n * @return {Array<Array<import(\"../../coordinate.js\").Coordinate>>} Coordinatess.\n */\nexport function inflateCoordinatesArray(\n  flatCoordinates,\n  offset,\n  ends,\n  stride,\n  coordinatess\n) {\n  coordinatess = coordinatess !== undefined ? coordinatess : [];\n  let i = 0;\n  for (let j = 0, jj = ends.length; j < jj; ++j) {\n    const end = ends[j];\n    coordinatess[i++] = inflateCoordinates(\n      flatCoordinates,\n      offset,\n      end,\n      stride,\n      coordinatess[i]\n    );\n    offset = end;\n  }\n  coordinatess.length = i;\n  return coordinatess;\n}\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<Array<number>>} endss Endss.\n * @param {number} stride Stride.\n * @param {Array<Array<Array<import(\"../../coordinate.js\").Coordinate>>>} [coordinatesss]\n *     Coordinatesss.\n * @return {Array<Array<Array<import(\"../../coordinate.js\").Coordinate>>>} Coordinatesss.\n */\nexport function inflateMultiCoordinatesArray(\n  flatCoordinates,\n  offset,\n  endss,\n  stride,\n  coordinatesss\n) {\n  coordinatesss = coordinatesss !== undefined ? coordinatesss : [];\n  let i = 0;\n  for (let j = 0, jj = endss.length; j < jj; ++j) {\n    const ends = endss[j];\n    coordinatesss[i++] =\n      ends.length === 1 && ends[0] === offset\n        ? []\n        : inflateCoordinatesArray(\n            flatCoordinates,\n            offset,\n            ends,\n            stride,\n            coordinatesss[i]\n          );\n    offset = ends[ends.length - 1];\n  }\n  coordinatesss.length = i;\n  return coordinatesss;\n}\n","/**\n * @module ol/geom/flat/area\n */\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @return {number} Area.\n */\nexport function linearRing(flatCoordinates, offset, end, stride) {\n  let twiceArea = 0;\n  let x1 = flatCoordinates[end - stride];\n  let y1 = flatCoordinates[end - stride + 1];\n  for (; offset < end; offset += stride) {\n    const x2 = flatCoordinates[offset];\n    const y2 = flatCoordinates[offset + 1];\n    twiceArea += y1 * x2 - x1 * y2;\n    x1 = x2;\n    y1 = y2;\n  }\n  return twiceArea / 2;\n}\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<number>} ends Ends.\n * @param {number} stride Stride.\n * @return {number} Area.\n */\nexport function linearRings(flatCoordinates, offset, ends, stride) {\n  let area = 0;\n  for (let i = 0, ii = ends.length; i < ii; ++i) {\n    const end = ends[i];\n    area += linearRing(flatCoordinates, offset, end, stride);\n    offset = end;\n  }\n  return area;\n}\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<Array<number>>} endss Endss.\n * @param {number} stride Stride.\n * @return {number} Area.\n */\nexport function linearRingss(flatCoordinates, offset, endss, stride) {\n  let area = 0;\n  for (let i = 0, ii = endss.length; i < ii; ++i) {\n    const ends = endss[i];\n    area += linearRings(flatCoordinates, offset, ends, stride);\n    offset = ends[ends.length - 1];\n  }\n  return area;\n}\n","/**\n * @module ol/geom/LinearRing\n */\nimport SimpleGeometry from './SimpleGeometry.js';\nimport {assignClosestPoint, maxSquaredDelta} from './flat/closest.js';\nimport {closestSquaredDistanceXY} from '../extent.js';\nimport {deflateCoordinates} from './flat/deflate.js';\nimport {douglasPeucker} from './flat/simplify.js';\nimport {inflateCoordinates} from './flat/inflate.js';\nimport {linearRing as linearRingArea} from './flat/area.js';\n\n/**\n * @classdesc\n * Linear ring geometry. Only used as part of polygon; cannot be rendered\n * on its own.\n *\n * @api\n */\nclass LinearRing extends SimpleGeometry {\n  /**\n   * @param {Array<import(\"../coordinate.js\").Coordinate>|Array<number>} coordinates Coordinates.\n   *     For internal use, flat coordinates in combination with `layout` are also accepted.\n   * @param {import(\"./Geometry.js\").GeometryLayout} [layout] Layout.\n   */\n  constructor(coordinates, layout) {\n    super();\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.maxDelta_ = -1;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.maxDeltaRevision_ = -1;\n\n    if (layout !== undefined && !Array.isArray(coordinates[0])) {\n      this.setFlatCoordinates(\n        layout,\n        /** @type {Array<number>} */ (coordinates)\n      );\n    } else {\n      this.setCoordinates(\n        /** @type {Array<import(\"../coordinate.js\").Coordinate>} */ (\n          coordinates\n        ),\n        layout\n      );\n    }\n  }\n\n  /**\n   * Make a complete copy of the geometry.\n   * @return {!LinearRing} Clone.\n   * @api\n   */\n  clone() {\n    return new LinearRing(this.flatCoordinates.slice(), this.layout);\n  }\n\n  /**\n   * @param {number} x X.\n   * @param {number} y Y.\n   * @param {import(\"../coordinate.js\").Coordinate} closestPoint Closest point.\n   * @param {number} minSquaredDistance Minimum squared distance.\n   * @return {number} Minimum squared distance.\n   */\n  closestPointXY(x, y, closestPoint, minSquaredDistance) {\n    if (minSquaredDistance < closestSquaredDistanceXY(this.getExtent(), x, y)) {\n      return minSquaredDistance;\n    }\n    if (this.maxDeltaRevision_ != this.getRevision()) {\n      this.maxDelta_ = Math.sqrt(\n        maxSquaredDelta(\n          this.flatCoordinates,\n          0,\n          this.flatCoordinates.length,\n          this.stride,\n          0\n        )\n      );\n      this.maxDeltaRevision_ = this.getRevision();\n    }\n    return assignClosestPoint(\n      this.flatCoordinates,\n      0,\n      this.flatCoordinates.length,\n      this.stride,\n      this.maxDelta_,\n      true,\n      x,\n      y,\n      closestPoint,\n      minSquaredDistance\n    );\n  }\n\n  /**\n   * Return the area of the linear ring on projected plane.\n   * @return {number} Area (on projected plane).\n   * @api\n   */\n  getArea() {\n    return linearRingArea(\n      this.flatCoordinates,\n      0,\n      this.flatCoordinates.length,\n      this.stride\n    );\n  }\n\n  /**\n   * Return the coordinates of the linear ring.\n   * @return {Array<import(\"../coordinate.js\").Coordinate>} Coordinates.\n   * @api\n   */\n  getCoordinates() {\n    return inflateCoordinates(\n      this.flatCoordinates,\n      0,\n      this.flatCoordinates.length,\n      this.stride\n    );\n  }\n\n  /**\n   * @param {number} squaredTolerance Squared tolerance.\n   * @return {LinearRing} Simplified LinearRing.\n   * @protected\n   */\n  getSimplifiedGeometryInternal(squaredTolerance) {\n    const simplifiedFlatCoordinates = [];\n    simplifiedFlatCoordinates.length = douglasPeucker(\n      this.flatCoordinates,\n      0,\n      this.flatCoordinates.length,\n      this.stride,\n      squaredTolerance,\n      simplifiedFlatCoordinates,\n      0\n    );\n    return new LinearRing(simplifiedFlatCoordinates, 'XY');\n  }\n\n  /**\n   * Get the type of this geometry.\n   * @return {import(\"./Geometry.js\").Type} Geometry type.\n   * @api\n   */\n  getType() {\n    return 'LinearRing';\n  }\n\n  /**\n   * Test if the geometry and the passed extent intersect.\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @return {boolean} `true` if the geometry and the extent intersect.\n   * @api\n   */\n  intersectsExtent(extent) {\n    return false;\n  }\n\n  /**\n   * Set the coordinates of the linear ring.\n   * @param {!Array<import(\"../coordinate.js\").Coordinate>} coordinates Coordinates.\n   * @param {import(\"./Geometry.js\").GeometryLayout} [layout] Layout.\n   * @api\n   */\n  setCoordinates(coordinates, layout) {\n    this.setLayout(layout, coordinates, 1);\n    if (!this.flatCoordinates) {\n      this.flatCoordinates = [];\n    }\n    this.flatCoordinates.length = deflateCoordinates(\n      this.flatCoordinates,\n      0,\n      coordinates,\n      this.stride\n    );\n    this.changed();\n  }\n}\n\nexport default LinearRing;\n","/**\n * @module ol/geom/Point\n */\nimport SimpleGeometry from './SimpleGeometry.js';\nimport {containsXY, createOrUpdateFromCoordinate} from '../extent.js';\nimport {deflateCoordinate} from './flat/deflate.js';\nimport {squaredDistance as squaredDx} from '../math.js';\n\n/**\n * @classdesc\n * Point geometry.\n *\n * @api\n */\nclass Point extends SimpleGeometry {\n  /**\n   * @param {import(\"../coordinate.js\").Coordinate} coordinates Coordinates.\n   * @param {import(\"./Geometry.js\").GeometryLayout} [layout] Layout.\n   */\n  constructor(coordinates, layout) {\n    super();\n    this.setCoordinates(coordinates, layout);\n  }\n\n  /**\n   * Make a complete copy of the geometry.\n   * @return {!Point} Clone.\n   * @api\n   */\n  clone() {\n    const point = new Point(this.flatCoordinates.slice(), this.layout);\n    point.applyProperties(this);\n    return point;\n  }\n\n  /**\n   * @param {number} x X.\n   * @param {number} y Y.\n   * @param {import(\"../coordinate.js\").Coordinate} closestPoint Closest point.\n   * @param {number} minSquaredDistance Minimum squared distance.\n   * @return {number} Minimum squared distance.\n   */\n  closestPointXY(x, y, closestPoint, minSquaredDistance) {\n    const flatCoordinates = this.flatCoordinates;\n    const squaredDistance = squaredDx(\n      x,\n      y,\n      flatCoordinates[0],\n      flatCoordinates[1]\n    );\n    if (squaredDistance < minSquaredDistance) {\n      const stride = this.stride;\n      for (let i = 0; i < stride; ++i) {\n        closestPoint[i] = flatCoordinates[i];\n      }\n      closestPoint.length = stride;\n      return squaredDistance;\n    }\n    return minSquaredDistance;\n  }\n\n  /**\n   * Return the coordinate of the point.\n   * @return {import(\"../coordinate.js\").Coordinate} Coordinates.\n   * @api\n   */\n  getCoordinates() {\n    return !this.flatCoordinates ? [] : this.flatCoordinates.slice();\n  }\n\n  /**\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @protected\n   * @return {import(\"../extent.js\").Extent} extent Extent.\n   */\n  computeExtent(extent) {\n    return createOrUpdateFromCoordinate(this.flatCoordinates, extent);\n  }\n\n  /**\n   * Get the type of this geometry.\n   * @return {import(\"./Geometry.js\").Type} Geometry type.\n   * @api\n   */\n  getType() {\n    return 'Point';\n  }\n\n  /**\n   * Test if the geometry and the passed extent intersect.\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @return {boolean} `true` if the geometry and the extent intersect.\n   * @api\n   */\n  intersectsExtent(extent) {\n    return containsXY(extent, this.flatCoordinates[0], this.flatCoordinates[1]);\n  }\n\n  /**\n   * @param {!Array<*>} coordinates Coordinates.\n   * @param {import(\"./Geometry.js\").GeometryLayout} [layout] Layout.\n   * @api\n   */\n  setCoordinates(coordinates, layout) {\n    this.setLayout(layout, coordinates, 0);\n    if (!this.flatCoordinates) {\n      this.flatCoordinates = [];\n    }\n    this.flatCoordinates.length = deflateCoordinate(\n      this.flatCoordinates,\n      0,\n      coordinates,\n      this.stride\n    );\n    this.changed();\n  }\n}\n\nexport default Point;\n","/**\n * @module ol/geom/flat/contains\n */\nimport {forEachCorner} from '../../extent.js';\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {import(\"../../extent.js\").Extent} extent Extent.\n * @return {boolean} Contains extent.\n */\nexport function linearRingContainsExtent(\n  flatCoordinates,\n  offset,\n  end,\n  stride,\n  extent\n) {\n  const outside = forEachCorner(\n    extent,\n    /**\n     * @param {import(\"../../coordinate.js\").Coordinate} coordinate Coordinate.\n     * @return {boolean} Contains (x, y).\n     */\n    function (coordinate) {\n      return !linearRingContainsXY(\n        flatCoordinates,\n        offset,\n        end,\n        stride,\n        coordinate[0],\n        coordinate[1]\n      );\n    }\n  );\n  return !outside;\n}\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} x X.\n * @param {number} y Y.\n * @return {boolean} Contains (x, y).\n */\nexport function linearRingContainsXY(\n  flatCoordinates,\n  offset,\n  end,\n  stride,\n  x,\n  y\n) {\n  // https://geomalgorithms.com/a03-_inclusion.html\n  // Copyright 2000 softSurfer, 2012 Dan Sunday\n  // This code may be freely used and modified for any purpose\n  // providing that this copyright notice is included with it.\n  // SoftSurfer makes no warranty for this code, and cannot be held\n  // liable for any real or imagined damage resulting from its use.\n  // Users of this code must verify correctness for their application.\n  let wn = 0;\n  let x1 = flatCoordinates[end - stride];\n  let y1 = flatCoordinates[end - stride + 1];\n  for (; offset < end; offset += stride) {\n    const x2 = flatCoordinates[offset];\n    const y2 = flatCoordinates[offset + 1];\n    if (y1 <= y) {\n      if (y2 > y && (x2 - x1) * (y - y1) - (x - x1) * (y2 - y1) > 0) {\n        wn++;\n      }\n    } else if (y2 <= y && (x2 - x1) * (y - y1) - (x - x1) * (y2 - y1) < 0) {\n      wn--;\n    }\n    x1 = x2;\n    y1 = y2;\n  }\n  return wn !== 0;\n}\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<number>} ends Ends.\n * @param {number} stride Stride.\n * @param {number} x X.\n * @param {number} y Y.\n * @return {boolean} Contains (x, y).\n */\nexport function linearRingsContainsXY(\n  flatCoordinates,\n  offset,\n  ends,\n  stride,\n  x,\n  y\n) {\n  if (ends.length === 0) {\n    return false;\n  }\n  if (!linearRingContainsXY(flatCoordinates, offset, ends[0], stride, x, y)) {\n    return false;\n  }\n  for (let i = 1, ii = ends.length; i < ii; ++i) {\n    if (\n      linearRingContainsXY(flatCoordinates, ends[i - 1], ends[i], stride, x, y)\n    ) {\n      return false;\n    }\n  }\n  return true;\n}\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<Array<number>>} endss Endss.\n * @param {number} stride Stride.\n * @param {number} x X.\n * @param {number} y Y.\n * @return {boolean} Contains (x, y).\n */\nexport function linearRingssContainsXY(\n  flatCoordinates,\n  offset,\n  endss,\n  stride,\n  x,\n  y\n) {\n  if (endss.length === 0) {\n    return false;\n  }\n  for (let i = 0, ii = endss.length; i < ii; ++i) {\n    const ends = endss[i];\n    if (linearRingsContainsXY(flatCoordinates, offset, ends, stride, x, y)) {\n      return true;\n    }\n    offset = ends[ends.length - 1];\n  }\n  return false;\n}\n","/**\n * @module ol/geom/flat/interiorpoint\n */\nimport {ascending} from '../../array.js';\nimport {linearRingsContainsXY} from './contains.js';\n\n/**\n * Calculates a point that is likely to lie in the interior of the linear rings.\n * Inspired by JTS's com.vividsolutions.jts.geom.Geometry#getInteriorPoint.\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<number>} ends Ends.\n * @param {number} stride Stride.\n * @param {Array<number>} flatCenters Flat centers.\n * @param {number} flatCentersOffset Flat center offset.\n * @param {Array<number>} [dest] Destination.\n * @return {Array<number>} Destination point as XYM coordinate, where M is the\n * length of the horizontal intersection that the point belongs to.\n */\nexport function getInteriorPointOfArray(\n  flatCoordinates,\n  offset,\n  ends,\n  stride,\n  flatCenters,\n  flatCentersOffset,\n  dest\n) {\n  let i, ii, x, x1, x2, y1, y2;\n  const y = flatCenters[flatCentersOffset + 1];\n  /** @type {Array<number>} */\n  const intersections = [];\n  // Calculate intersections with the horizontal line\n  for (let r = 0, rr = ends.length; r < rr; ++r) {\n    const end = ends[r];\n    x1 = flatCoordinates[end - stride];\n    y1 = flatCoordinates[end - stride + 1];\n    for (i = offset; i < end; i += stride) {\n      x2 = flatCoordinates[i];\n      y2 = flatCoordinates[i + 1];\n      if ((y <= y1 && y2 <= y) || (y1 <= y && y <= y2)) {\n        x = ((y - y1) / (y2 - y1)) * (x2 - x1) + x1;\n        intersections.push(x);\n      }\n      x1 = x2;\n      y1 = y2;\n    }\n  }\n  // Find the longest segment of the horizontal line that has its center point\n  // inside the linear ring.\n  let pointX = NaN;\n  let maxSegmentLength = -Infinity;\n  intersections.sort(ascending);\n  x1 = intersections[0];\n  for (i = 1, ii = intersections.length; i < ii; ++i) {\n    x2 = intersections[i];\n    const segmentLength = Math.abs(x2 - x1);\n    if (segmentLength > maxSegmentLength) {\n      x = (x1 + x2) / 2;\n      if (linearRingsContainsXY(flatCoordinates, offset, ends, stride, x, y)) {\n        pointX = x;\n        maxSegmentLength = segmentLength;\n      }\n    }\n    x1 = x2;\n  }\n  if (isNaN(pointX)) {\n    // There is no horizontal line that has its center point inside the linear\n    // ring.  Use the center of the the linear ring's extent.\n    pointX = flatCenters[flatCentersOffset];\n  }\n  if (dest) {\n    dest.push(pointX, y, maxSegmentLength);\n    return dest;\n  }\n  return [pointX, y, maxSegmentLength];\n}\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<Array<number>>} endss Endss.\n * @param {number} stride Stride.\n * @param {Array<number>} flatCenters Flat centers.\n * @return {Array<number>} Interior points as XYM coordinates, where M is the\n * length of the horizontal intersection that the point belongs to.\n */\nexport function getInteriorPointsOfMultiArray(\n  flatCoordinates,\n  offset,\n  endss,\n  stride,\n  flatCenters\n) {\n  let interiorPoints = [];\n  for (let i = 0, ii = endss.length; i < ii; ++i) {\n    const ends = endss[i];\n    interiorPoints = getInteriorPointOfArray(\n      flatCoordinates,\n      offset,\n      ends,\n      stride,\n      flatCenters,\n      2 * i,\n      interiorPoints\n    );\n    offset = ends[ends.length - 1];\n  }\n  return interiorPoints;\n}\n","/**\n * @module ol/geom/flat/segments\n */\n\n/**\n * This function calls `callback` for each segment of the flat coordinates\n * array. If the callback returns a truthy value the function returns that\n * value immediately. Otherwise the function returns `false`.\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {function(import(\"../../coordinate.js\").Coordinate, import(\"../../coordinate.js\").Coordinate): T} callback Function\n *     called for each segment.\n * @return {T|boolean} Value.\n * @template T\n */\nexport function forEach(flatCoordinates, offset, end, stride, callback) {\n  let ret;\n  offset += stride;\n  for (; offset < end; offset += stride) {\n    ret = callback(\n      flatCoordinates.slice(offset - stride, offset),\n      flatCoordinates.slice(offset, offset + stride)\n    );\n    if (ret) {\n      return ret;\n    }\n  }\n  return false;\n}\n","/**\n * @module ol/geom/flat/intersectsextent\n */\nimport {\n  containsExtent,\n  createEmpty,\n  extendFlatCoordinates,\n  intersects,\n  intersectsSegment,\n} from '../../extent.js';\nimport {forEach as forEachSegment} from './segments.js';\nimport {linearRingContainsExtent, linearRingContainsXY} from './contains.js';\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {import(\"../../extent.js\").Extent} extent Extent.\n * @return {boolean} True if the geometry and the extent intersect.\n */\nexport function intersectsLineString(\n  flatCoordinates,\n  offset,\n  end,\n  stride,\n  extent\n) {\n  const coordinatesExtent = extendFlatCoordinates(\n    createEmpty(),\n    flatCoordinates,\n    offset,\n    end,\n    stride\n  );\n  if (!intersects(extent, coordinatesExtent)) {\n    return false;\n  }\n  if (containsExtent(extent, coordinatesExtent)) {\n    return true;\n  }\n  if (coordinatesExtent[0] >= extent[0] && coordinatesExtent[2] <= extent[2]) {\n    return true;\n  }\n  if (coordinatesExtent[1] >= extent[1] && coordinatesExtent[3] <= extent[3]) {\n    return true;\n  }\n  return forEachSegment(\n    flatCoordinates,\n    offset,\n    end,\n    stride,\n    /**\n     * @param {import(\"../../coordinate.js\").Coordinate} point1 Start point.\n     * @param {import(\"../../coordinate.js\").Coordinate} point2 End point.\n     * @return {boolean} `true` if the segment and the extent intersect,\n     *     `false` otherwise.\n     */\n    function (point1, point2) {\n      return intersectsSegment(extent, point1, point2);\n    }\n  );\n}\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<number>} ends Ends.\n * @param {number} stride Stride.\n * @param {import(\"../../extent.js\").Extent} extent Extent.\n * @return {boolean} True if the geometry and the extent intersect.\n */\nexport function intersectsLineStringArray(\n  flatCoordinates,\n  offset,\n  ends,\n  stride,\n  extent\n) {\n  for (let i = 0, ii = ends.length; i < ii; ++i) {\n    if (\n      intersectsLineString(flatCoordinates, offset, ends[i], stride, extent)\n    ) {\n      return true;\n    }\n    offset = ends[i];\n  }\n  return false;\n}\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {import(\"../../extent.js\").Extent} extent Extent.\n * @return {boolean} True if the geometry and the extent intersect.\n */\nexport function intersectsLinearRing(\n  flatCoordinates,\n  offset,\n  end,\n  stride,\n  extent\n) {\n  if (intersectsLineString(flatCoordinates, offset, end, stride, extent)) {\n    return true;\n  }\n  if (\n    linearRingContainsXY(\n      flatCoordinates,\n      offset,\n      end,\n      stride,\n      extent[0],\n      extent[1]\n    )\n  ) {\n    return true;\n  }\n  if (\n    linearRingContainsXY(\n      flatCoordinates,\n      offset,\n      end,\n      stride,\n      extent[0],\n      extent[3]\n    )\n  ) {\n    return true;\n  }\n  if (\n    linearRingContainsXY(\n      flatCoordinates,\n      offset,\n      end,\n      stride,\n      extent[2],\n      extent[1]\n    )\n  ) {\n    return true;\n  }\n  if (\n    linearRingContainsXY(\n      flatCoordinates,\n      offset,\n      end,\n      stride,\n      extent[2],\n      extent[3]\n    )\n  ) {\n    return true;\n  }\n  return false;\n}\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<number>} ends Ends.\n * @param {number} stride Stride.\n * @param {import(\"../../extent.js\").Extent} extent Extent.\n * @return {boolean} True if the geometry and the extent intersect.\n */\nexport function intersectsLinearRingArray(\n  flatCoordinates,\n  offset,\n  ends,\n  stride,\n  extent\n) {\n  if (!intersectsLinearRing(flatCoordinates, offset, ends[0], stride, extent)) {\n    return false;\n  }\n  if (ends.length === 1) {\n    return true;\n  }\n  for (let i = 1, ii = ends.length; i < ii; ++i) {\n    if (\n      linearRingContainsExtent(\n        flatCoordinates,\n        ends[i - 1],\n        ends[i],\n        stride,\n        extent\n      )\n    ) {\n      if (\n        !intersectsLineString(\n          flatCoordinates,\n          ends[i - 1],\n          ends[i],\n          stride,\n          extent\n        )\n      ) {\n        return false;\n      }\n    }\n  }\n  return true;\n}\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<Array<number>>} endss Endss.\n * @param {number} stride Stride.\n * @param {import(\"../../extent.js\").Extent} extent Extent.\n * @return {boolean} True if the geometry and the extent intersect.\n */\nexport function intersectsLinearRingMultiArray(\n  flatCoordinates,\n  offset,\n  endss,\n  stride,\n  extent\n) {\n  for (let i = 0, ii = endss.length; i < ii; ++i) {\n    const ends = endss[i];\n    if (\n      intersectsLinearRingArray(flatCoordinates, offset, ends, stride, extent)\n    ) {\n      return true;\n    }\n    offset = ends[ends.length - 1];\n  }\n  return false;\n}\n","/**\n * @module ol/geom/flat/reverse\n */\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n */\nexport function coordinates(flatCoordinates, offset, end, stride) {\n  while (offset < end - stride) {\n    for (let i = 0; i < stride; ++i) {\n      const tmp = flatCoordinates[offset + i];\n      flatCoordinates[offset + i] = flatCoordinates[end - stride + i];\n      flatCoordinates[end - stride + i] = tmp;\n    }\n    offset += stride;\n    end -= stride;\n  }\n}\n","/**\n * @module ol/geom/flat/orient\n */\nimport {coordinates as reverseCoordinates} from './reverse.js';\n\n/**\n * Is the linear ring oriented clockwise in a coordinate system with a bottom-left\n * coordinate origin? For a coordinate system with a top-left coordinate origin,\n * the ring's orientation is clockwise when this function returns false.\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @return {boolean} Is clockwise.\n */\nexport function linearRingIsClockwise(flatCoordinates, offset, end, stride) {\n  // https://stackoverflow.com/q/1165647/clockwise-method#1165943\n  // https://github.com/OSGeo/gdal/blob/master/gdal/ogr/ogrlinearring.cpp\n  let edge = 0;\n  let x1 = flatCoordinates[end - stride];\n  let y1 = flatCoordinates[end - stride + 1];\n  for (; offset < end; offset += stride) {\n    const x2 = flatCoordinates[offset];\n    const y2 = flatCoordinates[offset + 1];\n    edge += (x2 - x1) * (y2 + y1);\n    x1 = x2;\n    y1 = y2;\n  }\n  return edge === 0 ? undefined : edge > 0;\n}\n\n/**\n * Determines if linear rings are oriented.  By default, left-hand orientation\n * is tested (first ring must be clockwise, remaining rings counter-clockwise).\n * To test for right-hand orientation, use the `right` argument.\n *\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<number>} ends Array of end indexes.\n * @param {number} stride Stride.\n * @param {boolean} [right] Test for right-hand orientation\n *     (counter-clockwise exterior ring and clockwise interior rings).\n * @return {boolean} Rings are correctly oriented.\n */\nexport function linearRingsAreOriented(\n  flatCoordinates,\n  offset,\n  ends,\n  stride,\n  right\n) {\n  right = right !== undefined ? right : false;\n  for (let i = 0, ii = ends.length; i < ii; ++i) {\n    const end = ends[i];\n    const isClockwise = linearRingIsClockwise(\n      flatCoordinates,\n      offset,\n      end,\n      stride\n    );\n    if (i === 0) {\n      if ((right && isClockwise) || (!right && !isClockwise)) {\n        return false;\n      }\n    } else {\n      if ((right && !isClockwise) || (!right && isClockwise)) {\n        return false;\n      }\n    }\n    offset = end;\n  }\n  return true;\n}\n\n/**\n * Determines if linear rings are oriented.  By default, left-hand orientation\n * is tested (first ring must be clockwise, remaining rings counter-clockwise).\n * To test for right-hand orientation, use the `right` argument.\n *\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<Array<number>>} endss Array of array of end indexes.\n * @param {number} stride Stride.\n * @param {boolean} [right] Test for right-hand orientation\n *     (counter-clockwise exterior ring and clockwise interior rings).\n * @return {boolean} Rings are correctly oriented.\n */\nexport function linearRingssAreOriented(\n  flatCoordinates,\n  offset,\n  endss,\n  stride,\n  right\n) {\n  for (let i = 0, ii = endss.length; i < ii; ++i) {\n    const ends = endss[i];\n    if (!linearRingsAreOriented(flatCoordinates, offset, ends, stride, right)) {\n      return false;\n    }\n    if (ends.length) {\n      offset = ends[ends.length - 1];\n    }\n  }\n  return true;\n}\n\n/**\n * Orient coordinates in a flat array of linear rings.  By default, rings\n * are oriented following the left-hand rule (clockwise for exterior and\n * counter-clockwise for interior rings).  To orient according to the\n * right-hand rule, use the `right` argument.\n *\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<number>} ends Ends.\n * @param {number} stride Stride.\n * @param {boolean} [right] Follow the right-hand rule for orientation.\n * @return {number} End.\n */\nexport function orientLinearRings(\n  flatCoordinates,\n  offset,\n  ends,\n  stride,\n  right\n) {\n  right = right !== undefined ? right : false;\n  for (let i = 0, ii = ends.length; i < ii; ++i) {\n    const end = ends[i];\n    const isClockwise = linearRingIsClockwise(\n      flatCoordinates,\n      offset,\n      end,\n      stride\n    );\n    const reverse =\n      i === 0\n        ? (right && isClockwise) || (!right && !isClockwise)\n        : (right && !isClockwise) || (!right && isClockwise);\n    if (reverse) {\n      reverseCoordinates(flatCoordinates, offset, end, stride);\n    }\n    offset = end;\n  }\n  return offset;\n}\n\n/**\n * Orient coordinates in a flat array of linear rings.  By default, rings\n * are oriented following the left-hand rule (clockwise for exterior and\n * counter-clockwise for interior rings).  To orient according to the\n * right-hand rule, use the `right` argument.\n *\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<Array<number>>} endss Array of array of end indexes.\n * @param {number} stride Stride.\n * @param {boolean} [right] Follow the right-hand rule for orientation.\n * @return {number} End.\n */\nexport function orientLinearRingsArray(\n  flatCoordinates,\n  offset,\n  endss,\n  stride,\n  right\n) {\n  for (let i = 0, ii = endss.length; i < ii; ++i) {\n    offset = orientLinearRings(\n      flatCoordinates,\n      offset,\n      endss[i],\n      stride,\n      right\n    );\n  }\n  return offset;\n}\n\n/**\n * Return a two-dimensional endss\n * @param {Array<number>} flatCoordinates Flat coordinates\n * @param {Array<number>} ends Linear ring end indexes\n * @return {Array<Array<number>>} Two dimensional endss array that can\n * be used to construct a MultiPolygon\n */\nexport function inflateEnds(flatCoordinates, ends) {\n  const endss = [];\n  let offset = 0;\n  let prevEndIndex = 0;\n  for (let i = 0, ii = ends.length; i < ii; ++i) {\n    const end = ends[i];\n    // classifies an array of rings into polygons with outer rings and holes\n    if (!linearRingIsClockwise(flatCoordinates, offset, end, 2)) {\n      endss.push(ends.slice(prevEndIndex, i + 1));\n    } else {\n      if (endss.length === 0) {\n        continue;\n      }\n      endss[endss.length - 1].push(ends[prevEndIndex]);\n    }\n    prevEndIndex = i + 1;\n    offset = end;\n  }\n  return endss;\n}\n","/**\n * @module ol/geom/Polygon\n */\nimport LinearRing from './LinearRing.js';\nimport Point from './Point.js';\nimport SimpleGeometry from './SimpleGeometry.js';\nimport {arrayMaxSquaredDelta, assignClosestArrayPoint} from './flat/closest.js';\nimport {closestSquaredDistanceXY, getCenter} from '../extent.js';\nimport {deflateCoordinatesArray} from './flat/deflate.js';\nimport {extend} from '../array.js';\nimport {getInteriorPointOfArray} from './flat/interiorpoint.js';\nimport {inflateCoordinatesArray} from './flat/inflate.js';\nimport {intersectsLinearRingArray} from './flat/intersectsextent.js';\nimport {linearRingsAreOriented, orientLinearRings} from './flat/orient.js';\nimport {linearRings as linearRingsArea} from './flat/area.js';\nimport {linearRingsContainsXY} from './flat/contains.js';\nimport {modulo} from '../math.js';\nimport {quantizeArray} from './flat/simplify.js';\nimport {offset as sphereOffset} from '../sphere.js';\n\n/**\n * @classdesc\n * Polygon geometry.\n *\n * @api\n */\nclass Polygon extends SimpleGeometry {\n  /**\n   * @param {!Array<Array<import(\"../coordinate.js\").Coordinate>>|!Array<number>} coordinates\n   *     Array of linear rings that define the polygon. The first linear ring of the\n   *     array defines the outer-boundary or surface of the polygon. Each subsequent\n   *     linear ring defines a hole in the surface of the polygon. A linear ring is\n   *     an array of vertices' coordinates where the first coordinate and the last are\n   *     equivalent. (For internal use, flat coordinates in combination with\n   *     `layout` and `ends` are also accepted.)\n   * @param {import(\"./Geometry.js\").GeometryLayout} [layout] Layout.\n   * @param {Array<number>} [ends] Ends (for internal use with flat coordinates).\n   */\n  constructor(coordinates, layout, ends) {\n    super();\n\n    /**\n     * @type {Array<number>}\n     * @private\n     */\n    this.ends_ = [];\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.flatInteriorPointRevision_ = -1;\n\n    /**\n     * @private\n     * @type {import(\"../coordinate.js\").Coordinate}\n     */\n    this.flatInteriorPoint_ = null;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.maxDelta_ = -1;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.maxDeltaRevision_ = -1;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.orientedRevision_ = -1;\n\n    /**\n     * @private\n     * @type {Array<number>}\n     */\n    this.orientedFlatCoordinates_ = null;\n\n    if (layout !== undefined && ends) {\n      this.setFlatCoordinates(\n        layout,\n        /** @type {Array<number>} */ (coordinates)\n      );\n      this.ends_ = ends;\n    } else {\n      this.setCoordinates(\n        /** @type {Array<Array<import(\"../coordinate.js\").Coordinate>>} */ (\n          coordinates\n        ),\n        layout\n      );\n    }\n  }\n\n  /**\n   * Append the passed linear ring to this polygon.\n   * @param {LinearRing} linearRing Linear ring.\n   * @api\n   */\n  appendLinearRing(linearRing) {\n    if (!this.flatCoordinates) {\n      this.flatCoordinates = linearRing.getFlatCoordinates().slice();\n    } else {\n      extend(this.flatCoordinates, linearRing.getFlatCoordinates());\n    }\n    this.ends_.push(this.flatCoordinates.length);\n    this.changed();\n  }\n\n  /**\n   * Make a complete copy of the geometry.\n   * @return {!Polygon} Clone.\n   * @api\n   */\n  clone() {\n    const polygon = new Polygon(\n      this.flatCoordinates.slice(),\n      this.layout,\n      this.ends_.slice()\n    );\n    polygon.applyProperties(this);\n    return polygon;\n  }\n\n  /**\n   * @param {number} x X.\n   * @param {number} y Y.\n   * @param {import(\"../coordinate.js\").Coordinate} closestPoint Closest point.\n   * @param {number} minSquaredDistance Minimum squared distance.\n   * @return {number} Minimum squared distance.\n   */\n  closestPointXY(x, y, closestPoint, minSquaredDistance) {\n    if (minSquaredDistance < closestSquaredDistanceXY(this.getExtent(), x, y)) {\n      return minSquaredDistance;\n    }\n    if (this.maxDeltaRevision_ != this.getRevision()) {\n      this.maxDelta_ = Math.sqrt(\n        arrayMaxSquaredDelta(\n          this.flatCoordinates,\n          0,\n          this.ends_,\n          this.stride,\n          0\n        )\n      );\n      this.maxDeltaRevision_ = this.getRevision();\n    }\n    return assignClosestArrayPoint(\n      this.flatCoordinates,\n      0,\n      this.ends_,\n      this.stride,\n      this.maxDelta_,\n      true,\n      x,\n      y,\n      closestPoint,\n      minSquaredDistance\n    );\n  }\n\n  /**\n   * @param {number} x X.\n   * @param {number} y Y.\n   * @return {boolean} Contains (x, y).\n   */\n  containsXY(x, y) {\n    return linearRingsContainsXY(\n      this.getOrientedFlatCoordinates(),\n      0,\n      this.ends_,\n      this.stride,\n      x,\n      y\n    );\n  }\n\n  /**\n   * Return the area of the polygon on projected plane.\n   * @return {number} Area (on projected plane).\n   * @api\n   */\n  getArea() {\n    return linearRingsArea(\n      this.getOrientedFlatCoordinates(),\n      0,\n      this.ends_,\n      this.stride\n    );\n  }\n\n  /**\n   * Get the coordinate array for this geometry.  This array has the structure\n   * of a GeoJSON coordinate array for polygons.\n   *\n   * @param {boolean} [right] Orient coordinates according to the right-hand\n   *     rule (counter-clockwise for exterior and clockwise for interior rings).\n   *     If `false`, coordinates will be oriented according to the left-hand rule\n   *     (clockwise for exterior and counter-clockwise for interior rings).\n   *     By default, coordinate orientation will depend on how the geometry was\n   *     constructed.\n   * @return {Array<Array<import(\"../coordinate.js\").Coordinate>>} Coordinates.\n   * @api\n   */\n  getCoordinates(right) {\n    let flatCoordinates;\n    if (right !== undefined) {\n      flatCoordinates = this.getOrientedFlatCoordinates().slice();\n      orientLinearRings(flatCoordinates, 0, this.ends_, this.stride, right);\n    } else {\n      flatCoordinates = this.flatCoordinates;\n    }\n\n    return inflateCoordinatesArray(flatCoordinates, 0, this.ends_, this.stride);\n  }\n\n  /**\n   * @return {Array<number>} Ends.\n   */\n  getEnds() {\n    return this.ends_;\n  }\n\n  /**\n   * @return {Array<number>} Interior point.\n   */\n  getFlatInteriorPoint() {\n    if (this.flatInteriorPointRevision_ != this.getRevision()) {\n      const flatCenter = getCenter(this.getExtent());\n      this.flatInteriorPoint_ = getInteriorPointOfArray(\n        this.getOrientedFlatCoordinates(),\n        0,\n        this.ends_,\n        this.stride,\n        flatCenter,\n        0\n      );\n      this.flatInteriorPointRevision_ = this.getRevision();\n    }\n    return this.flatInteriorPoint_;\n  }\n\n  /**\n   * Return an interior point of the polygon.\n   * @return {Point} Interior point as XYM coordinate, where M is the\n   * length of the horizontal intersection that the point belongs to.\n   * @api\n   */\n  getInteriorPoint() {\n    return new Point(this.getFlatInteriorPoint(), 'XYM');\n  }\n\n  /**\n   * Return the number of rings of the polygon,  this includes the exterior\n   * ring and any interior rings.\n   *\n   * @return {number} Number of rings.\n   * @api\n   */\n  getLinearRingCount() {\n    return this.ends_.length;\n  }\n\n  /**\n   * Return the Nth linear ring of the polygon geometry. Return `null` if the\n   * given index is out of range.\n   * The exterior linear ring is available at index `0` and the interior rings\n   * at index `1` and beyond.\n   *\n   * @param {number} index Index.\n   * @return {LinearRing|null} Linear ring.\n   * @api\n   */\n  getLinearRing(index) {\n    if (index < 0 || this.ends_.length <= index) {\n      return null;\n    }\n    return new LinearRing(\n      this.flatCoordinates.slice(\n        index === 0 ? 0 : this.ends_[index - 1],\n        this.ends_[index]\n      ),\n      this.layout\n    );\n  }\n\n  /**\n   * Return the linear rings of the polygon.\n   * @return {Array<LinearRing>} Linear rings.\n   * @api\n   */\n  getLinearRings() {\n    const layout = this.layout;\n    const flatCoordinates = this.flatCoordinates;\n    const ends = this.ends_;\n    const linearRings = [];\n    let offset = 0;\n    for (let i = 0, ii = ends.length; i < ii; ++i) {\n      const end = ends[i];\n      const linearRing = new LinearRing(\n        flatCoordinates.slice(offset, end),\n        layout\n      );\n      linearRings.push(linearRing);\n      offset = end;\n    }\n    return linearRings;\n  }\n\n  /**\n   * @return {Array<number>} Oriented flat coordinates.\n   */\n  getOrientedFlatCoordinates() {\n    if (this.orientedRevision_ != this.getRevision()) {\n      const flatCoordinates = this.flatCoordinates;\n      if (linearRingsAreOriented(flatCoordinates, 0, this.ends_, this.stride)) {\n        this.orientedFlatCoordinates_ = flatCoordinates;\n      } else {\n        this.orientedFlatCoordinates_ = flatCoordinates.slice();\n        this.orientedFlatCoordinates_.length = orientLinearRings(\n          this.orientedFlatCoordinates_,\n          0,\n          this.ends_,\n          this.stride\n        );\n      }\n      this.orientedRevision_ = this.getRevision();\n    }\n    return this.orientedFlatCoordinates_;\n  }\n\n  /**\n   * @param {number} squaredTolerance Squared tolerance.\n   * @return {Polygon} Simplified Polygon.\n   * @protected\n   */\n  getSimplifiedGeometryInternal(squaredTolerance) {\n    const simplifiedFlatCoordinates = [];\n    const simplifiedEnds = [];\n    simplifiedFlatCoordinates.length = quantizeArray(\n      this.flatCoordinates,\n      0,\n      this.ends_,\n      this.stride,\n      Math.sqrt(squaredTolerance),\n      simplifiedFlatCoordinates,\n      0,\n      simplifiedEnds\n    );\n    return new Polygon(simplifiedFlatCoordinates, 'XY', simplifiedEnds);\n  }\n\n  /**\n   * Get the type of this geometry.\n   * @return {import(\"./Geometry.js\").Type} Geometry type.\n   * @api\n   */\n  getType() {\n    return 'Polygon';\n  }\n\n  /**\n   * Test if the geometry and the passed extent intersect.\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @return {boolean} `true` if the geometry and the extent intersect.\n   * @api\n   */\n  intersectsExtent(extent) {\n    return intersectsLinearRingArray(\n      this.getOrientedFlatCoordinates(),\n      0,\n      this.ends_,\n      this.stride,\n      extent\n    );\n  }\n\n  /**\n   * Set the coordinates of the polygon.\n   * @param {!Array<Array<import(\"../coordinate.js\").Coordinate>>} coordinates Coordinates.\n   * @param {import(\"./Geometry.js\").GeometryLayout} [layout] Layout.\n   * @api\n   */\n  setCoordinates(coordinates, layout) {\n    this.setLayout(layout, coordinates, 2);\n    if (!this.flatCoordinates) {\n      this.flatCoordinates = [];\n    }\n    const ends = deflateCoordinatesArray(\n      this.flatCoordinates,\n      0,\n      coordinates,\n      this.stride,\n      this.ends_\n    );\n    this.flatCoordinates.length = ends.length === 0 ? 0 : ends[ends.length - 1];\n    this.changed();\n  }\n}\n\nexport default Polygon;\n\n/**\n * Create an approximation of a circle on the surface of a sphere.\n * @param {import(\"../coordinate.js\").Coordinate} center Center (`[lon, lat]` in degrees).\n * @param {number} radius The great-circle distance from the center to\n *     the polygon vertices in meters.\n * @param {number} [n] Optional number of vertices for the resulting\n *     polygon. Default is `32`.\n * @param {number} [sphereRadius] Optional radius for the sphere (defaults to\n *     the Earth's mean radius using the WGS84 ellipsoid).\n * @return {Polygon} The \"circular\" polygon.\n * @api\n */\nexport function circular(center, radius, n, sphereRadius) {\n  n = n ? n : 32;\n  /** @type {Array<number>} */\n  const flatCoordinates = [];\n  for (let i = 0; i < n; ++i) {\n    extend(\n      flatCoordinates,\n      sphereOffset(center, radius, (2 * Math.PI * i) / n, sphereRadius)\n    );\n  }\n  flatCoordinates.push(flatCoordinates[0], flatCoordinates[1]);\n  return new Polygon(flatCoordinates, 'XY', [flatCoordinates.length]);\n}\n\n/**\n * Create a polygon from an extent. The layout used is `XY`.\n * @param {import(\"../extent.js\").Extent} extent The extent.\n * @return {Polygon} The polygon.\n * @api\n */\nexport function fromExtent(extent) {\n  const minX = extent[0];\n  const minY = extent[1];\n  const maxX = extent[2];\n  const maxY = extent[3];\n  const flatCoordinates = [\n    minX,\n    minY,\n    minX,\n    maxY,\n    maxX,\n    maxY,\n    maxX,\n    minY,\n    minX,\n    minY,\n  ];\n  return new Polygon(flatCoordinates, 'XY', [flatCoordinates.length]);\n}\n\n/**\n * Create a regular polygon from a circle.\n * @param {import(\"./Circle.js\").default} circle Circle geometry.\n * @param {number} [sides] Number of sides of the polygon. Default is 32.\n * @param {number} [angle] Start angle for the first vertex of the polygon in\n *     counter-clockwise radians. 0 means East. Default is 0.\n * @return {Polygon} Polygon geometry.\n * @api\n */\nexport function fromCircle(circle, sides, angle) {\n  sides = sides ? sides : 32;\n  const stride = circle.getStride();\n  const layout = circle.getLayout();\n  const center = circle.getCenter();\n  const arrayLength = stride * (sides + 1);\n  const flatCoordinates = new Array(arrayLength);\n  for (let i = 0; i < arrayLength; i += stride) {\n    flatCoordinates[i] = 0;\n    flatCoordinates[i + 1] = 0;\n    for (let j = 2; j < stride; j++) {\n      flatCoordinates[i + j] = center[j];\n    }\n  }\n  const ends = [flatCoordinates.length];\n  const polygon = new Polygon(flatCoordinates, layout, ends);\n  makeRegular(polygon, center, circle.getRadius(), angle);\n  return polygon;\n}\n\n/**\n * Modify the coordinates of a polygon to make it a regular polygon.\n * @param {Polygon} polygon Polygon geometry.\n * @param {import(\"../coordinate.js\").Coordinate} center Center of the regular polygon.\n * @param {number} radius Radius of the regular polygon.\n * @param {number} [angle] Start angle for the first vertex of the polygon in\n *     counter-clockwise radians. 0 means East. Default is 0.\n */\nexport function makeRegular(polygon, center, radius, angle) {\n  const flatCoordinates = polygon.getFlatCoordinates();\n  const stride = polygon.getStride();\n  const sides = flatCoordinates.length / stride - 1;\n  const startAngle = angle ? angle : 0;\n  for (let i = 0; i <= sides; ++i) {\n    const offset = i * stride;\n    const angle = startAngle + (modulo(i, sides) * 2 * Math.PI) / sides;\n    flatCoordinates[offset] = center[0] + radius * Math.cos(angle);\n    flatCoordinates[offset + 1] = center[1] + radius * Math.sin(angle);\n  }\n  polygon.changed();\n}\n","/**\n * @module ol/Geolocation\n */\nimport BaseEvent from './events/Event.js';\nimport BaseObject from './Object.js';\nimport {circular as circularPolygon} from './geom/Polygon.js';\nimport {\n  get as getProjection,\n  getTransformFromProjections,\n  identityTransform,\n} from './proj.js';\nimport {toRadians} from './math.js';\n\n/**\n * @enum {string}\n */\nconst Property = {\n  ACCURACY: 'accuracy',\n  ACCURACY_GEOMETRY: 'accuracyGeometry',\n  ALTITUDE: 'altitude',\n  ALTITUDE_ACCURACY: 'altitudeAccuracy',\n  HEADING: 'heading',\n  POSITION: 'position',\n  PROJECTION: 'projection',\n  SPEED: 'speed',\n  TRACKING: 'tracking',\n  TRACKING_OPTIONS: 'trackingOptions',\n};\n\n/**\n * @enum string\n */\nconst GeolocationErrorType = {\n  /**\n   * Triggered when a `GeolocationPositionError` occurs.\n   * @event module:ol/Geolocation.GeolocationError#error\n   * @api\n   */\n  ERROR: 'error',\n};\n\n/**\n * @classdesc\n * Events emitted on [GeolocationPositionError](https://developer.mozilla.org/en-US/docs/Web/API/GeolocationPositionError).\n */\nexport class GeolocationError extends BaseEvent {\n  /**\n   * @param {GeolocationPositionError} error error object.\n   */\n  constructor(error) {\n    super(GeolocationErrorType.ERROR);\n\n    /**\n     * Code of the underlying `GeolocationPositionError`.\n     * @type {number}\n     * @api\n     */\n    this.code = error.code;\n\n    /**\n     * Message of the underlying `GeolocationPositionError`.\n     * @type {string}\n     * @api\n     */\n    this.message = error.message;\n  }\n}\n\n/**\n * @typedef {Object} Options\n * @property {boolean} [tracking=false] Start Tracking right after\n * instantiation.\n * @property {PositionOptions} [trackingOptions] Tracking options.\n * See https://www.w3.org/TR/geolocation-API/#position_options_interface.\n * @property {import(\"./proj.js\").ProjectionLike} [projection] The projection the position\n * is reported in.\n */\n\n/**\n * @typedef {import(\"./ObjectEventType\").Types|'change:accuracy'|'change:accuracyGeometry'|'change:altitude'|\n *    'change:altitudeAccuracy'|'change:heading'|'change:position'|'change:projection'|'change:speed'|'change:tracking'|\n *    'change:trackingOptions'} GeolocationObjectEventTypes\n */\n\n/***\n * @template Return\n * @typedef {import(\"./Observable\").OnSignature<GeolocationObjectEventTypes, import(\"./Object\").ObjectEvent, Return> &\n *   import(\"./Observable\").OnSignature<'error', GeolocationError, Return> &\n *   import(\"./Observable\").CombinedOnSignature<import(\"./Observable\").EventTypes|GeolocationObjectEventTypes, Return> &\n *   import(\"./Observable\").OnSignature<import(\"./Observable\").EventTypes, import(\"./events/Event.js\").default, Return>} GeolocationOnSignature\n */\n\n/**\n * @classdesc\n * Helper class for providing HTML5 Geolocation capabilities.\n * The [Geolocation API](https://www.w3.org/TR/geolocation-API/)\n * is used to locate a user's position.\n *\n * To get notified of position changes and errors, register listeners for the generic\n * `change` event and the `error` event on your instance of {@link module:ol/Geolocation~Geolocation}.\n *\n * Example:\n *\n *     const geolocation = new Geolocation({\n *       // take the projection to use from the map's view\n *       projection: view.getProjection()\n *     });\n *     // listen to changes in position\n *     geolocation.on('change', function(evt) {\n *       console.log(geolocation.getPosition());\n *     });\n *     // listen to error\n *     geolocation.on('error', function(evt) {\n *       window.console.log(evt.message);\n *     });\n *\n * @fires GeolocationError\n * @api\n */\nclass Geolocation extends BaseObject {\n  /**\n   * @param {Options} [options] Options.\n   */\n  constructor(options) {\n    super();\n\n    /***\n     * @type {GeolocationOnSignature<import(\"./events\").EventsKey>}\n     */\n    this.on;\n\n    /***\n     * @type {GeolocationOnSignature<import(\"./events\").EventsKey>}\n     */\n    this.once;\n\n    /***\n     * @type {GeolocationOnSignature<void>}\n     */\n    this.un;\n\n    options = options || {};\n\n    /**\n     * The unprojected (EPSG:4326) device position.\n     * @private\n     * @type {?import(\"./coordinate.js\").Coordinate}\n     */\n    this.position_ = null;\n\n    /**\n     * @private\n     * @type {import(\"./proj.js\").TransformFunction}\n     */\n    this.transform_ = identityTransform;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.watchId_ = undefined;\n\n    this.addChangeListener(Property.PROJECTION, this.handleProjectionChanged_);\n    this.addChangeListener(Property.TRACKING, this.handleTrackingChanged_);\n\n    if (options.projection !== undefined) {\n      this.setProjection(options.projection);\n    }\n    if (options.trackingOptions !== undefined) {\n      this.setTrackingOptions(options.trackingOptions);\n    }\n\n    this.setTracking(options.tracking !== undefined ? options.tracking : false);\n  }\n\n  /**\n   * Clean up.\n   */\n  disposeInternal() {\n    this.setTracking(false);\n    super.disposeInternal();\n  }\n\n  /**\n   * @private\n   */\n  handleProjectionChanged_() {\n    const projection = this.getProjection();\n    if (projection) {\n      this.transform_ = getTransformFromProjections(\n        getProjection('EPSG:4326'),\n        projection\n      );\n      if (this.position_) {\n        this.set(Property.POSITION, this.transform_(this.position_));\n      }\n    }\n  }\n\n  /**\n   * @private\n   */\n  handleTrackingChanged_() {\n    if ('geolocation' in navigator) {\n      const tracking = this.getTracking();\n      if (tracking && this.watchId_ === undefined) {\n        this.watchId_ = navigator.geolocation.watchPosition(\n          this.positionChange_.bind(this),\n          this.positionError_.bind(this),\n          this.getTrackingOptions()\n        );\n      } else if (!tracking && this.watchId_ !== undefined) {\n        navigator.geolocation.clearWatch(this.watchId_);\n        this.watchId_ = undefined;\n      }\n    }\n  }\n\n  /**\n   * @private\n   * @param {GeolocationPosition} position position event.\n   */\n  positionChange_(position) {\n    const coords = position.coords;\n    this.set(Property.ACCURACY, coords.accuracy);\n    this.set(\n      Property.ALTITUDE,\n      coords.altitude === null ? undefined : coords.altitude\n    );\n    this.set(\n      Property.ALTITUDE_ACCURACY,\n      coords.altitudeAccuracy === null ? undefined : coords.altitudeAccuracy\n    );\n    this.set(\n      Property.HEADING,\n      coords.heading === null ? undefined : toRadians(coords.heading)\n    );\n    if (!this.position_) {\n      this.position_ = [coords.longitude, coords.latitude];\n    } else {\n      this.position_[0] = coords.longitude;\n      this.position_[1] = coords.latitude;\n    }\n    const projectedPosition = this.transform_(this.position_);\n    this.set(Property.POSITION, projectedPosition.slice());\n    this.set(Property.SPEED, coords.speed === null ? undefined : coords.speed);\n    const geometry = circularPolygon(this.position_, coords.accuracy);\n    geometry.applyTransform(this.transform_);\n    this.set(Property.ACCURACY_GEOMETRY, geometry);\n    this.changed();\n  }\n\n  /**\n   * @private\n   * @param {GeolocationPositionError} error error object.\n   */\n  positionError_(error) {\n    this.dispatchEvent(new GeolocationError(error));\n  }\n\n  /**\n   * Get the accuracy of the position in meters.\n   * @return {number|undefined} The accuracy of the position measurement in\n   *     meters.\n   * @observable\n   * @api\n   */\n  getAccuracy() {\n    return /** @type {number|undefined} */ (this.get(Property.ACCURACY));\n  }\n\n  /**\n   * Get a geometry of the position accuracy.\n   * @return {?import(\"./geom/Polygon.js\").default} A geometry of the position accuracy.\n   * @observable\n   * @api\n   */\n  getAccuracyGeometry() {\n    return /** @type {?import(\"./geom/Polygon.js\").default} */ (\n      this.get(Property.ACCURACY_GEOMETRY) || null\n    );\n  }\n\n  /**\n   * Get the altitude associated with the position.\n   * @return {number|undefined} The altitude of the position in meters above mean\n   *     sea level.\n   * @observable\n   * @api\n   */\n  getAltitude() {\n    return /** @type {number|undefined} */ (this.get(Property.ALTITUDE));\n  }\n\n  /**\n   * Get the altitude accuracy of the position.\n   * @return {number|undefined} The accuracy of the altitude measurement in\n   *     meters.\n   * @observable\n   * @api\n   */\n  getAltitudeAccuracy() {\n    return /** @type {number|undefined} */ (\n      this.get(Property.ALTITUDE_ACCURACY)\n    );\n  }\n\n  /**\n   * Get the heading as radians clockwise from North.\n   * Note: depending on the browser, the heading is only defined if the `enableHighAccuracy`\n   * is set to `true` in the tracking options.\n   * @return {number|undefined} The heading of the device in radians from north.\n   * @observable\n   * @api\n   */\n  getHeading() {\n    return /** @type {number|undefined} */ (this.get(Property.HEADING));\n  }\n\n  /**\n   * Get the position of the device.\n   * @return {import(\"./coordinate.js\").Coordinate|undefined} The current position of the device reported\n   *     in the current projection.\n   * @observable\n   * @api\n   */\n  getPosition() {\n    return /** @type {import(\"./coordinate.js\").Coordinate|undefined} */ (\n      this.get(Property.POSITION)\n    );\n  }\n\n  /**\n   * Get the projection associated with the position.\n   * @return {import(\"./proj/Projection.js\").default|undefined} The projection the position is\n   *     reported in.\n   * @observable\n   * @api\n   */\n  getProjection() {\n    return /** @type {import(\"./proj/Projection.js\").default|undefined} */ (\n      this.get(Property.PROJECTION)\n    );\n  }\n\n  /**\n   * Get the speed in meters per second.\n   * @return {number|undefined} The instantaneous speed of the device in meters\n   *     per second.\n   * @observable\n   * @api\n   */\n  getSpeed() {\n    return /** @type {number|undefined} */ (this.get(Property.SPEED));\n  }\n\n  /**\n   * Determine if the device location is being tracked.\n   * @return {boolean} The device location is being tracked.\n   * @observable\n   * @api\n   */\n  getTracking() {\n    return /** @type {boolean} */ (this.get(Property.TRACKING));\n  }\n\n  /**\n   * Get the tracking options.\n   * See https://www.w3.org/TR/geolocation-API/#position-options.\n   * @return {PositionOptions|undefined} PositionOptions as defined by\n   *     the [HTML5 Geolocation spec\n   *     ](https://www.w3.org/TR/geolocation-API/#position_options_interface).\n   * @observable\n   * @api\n   */\n  getTrackingOptions() {\n    return /** @type {PositionOptions|undefined} */ (\n      this.get(Property.TRACKING_OPTIONS)\n    );\n  }\n\n  /**\n   * Set the projection to use for transforming the coordinates.\n   * @param {import(\"./proj.js\").ProjectionLike} projection The projection the position is\n   *     reported in.\n   * @observable\n   * @api\n   */\n  setProjection(projection) {\n    this.set(Property.PROJECTION, getProjection(projection));\n  }\n\n  /**\n   * Enable or disable tracking.\n   * @param {boolean} tracking Enable tracking.\n   * @observable\n   * @api\n   */\n  setTracking(tracking) {\n    this.set(Property.TRACKING, tracking);\n  }\n\n  /**\n   * Set the tracking options.\n   * See http://www.w3.org/TR/geolocation-API/#position-options.\n   * @param {PositionOptions} options PositionOptions as defined by the\n   *     [HTML5 Geolocation spec\n   *     ](http://www.w3.org/TR/geolocation-API/#position_options_interface).\n   * @observable\n   * @api\n   */\n  setTrackingOptions(options) {\n    this.set(Property.TRACKING_OPTIONS, options);\n  }\n}\n\nexport default Geolocation;\n","/**\n * @module ol/ImageBase\n */\nimport EventTarget from './events/Target.js';\nimport EventType from './events/EventType.js';\nimport {abstract} from './util.js';\n\n/**\n * @abstract\n */\nclass ImageBase extends EventTarget {\n  /**\n   * @param {import(\"./extent.js\").Extent} extent Extent.\n   * @param {number|undefined} resolution Resolution.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {import(\"./ImageState.js\").default} state State.\n   */\n  constructor(extent, resolution, pixelRatio, state) {\n    super();\n\n    /**\n     * @protected\n     * @type {import(\"./extent.js\").Extent}\n     */\n    this.extent = extent;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.pixelRatio_ = pixelRatio;\n\n    /**\n     * @protected\n     * @type {number|undefined}\n     */\n    this.resolution = resolution;\n\n    /**\n     * @protected\n     * @type {import(\"./ImageState.js\").default}\n     */\n    this.state = state;\n  }\n\n  /**\n   * @protected\n   */\n  changed() {\n    this.dispatchEvent(EventType.CHANGE);\n  }\n\n  /**\n   * @return {import(\"./extent.js\").Extent} Extent.\n   */\n  getExtent() {\n    return this.extent;\n  }\n\n  /**\n   * @abstract\n   * @return {HTMLCanvasElement|HTMLImageElement|HTMLVideoElement} Image.\n   */\n  getImage() {\n    return abstract();\n  }\n\n  /**\n   * @return {number} PixelRatio.\n   */\n  getPixelRatio() {\n    return this.pixelRatio_;\n  }\n\n  /**\n   * @return {number} Resolution.\n   */\n  getResolution() {\n    return /** @type {number} */ (this.resolution);\n  }\n\n  /**\n   * @return {import(\"./ImageState.js\").default} State.\n   */\n  getState() {\n    return this.state;\n  }\n\n  /**\n   * Load not yet loaded URI.\n   * @abstract\n   */\n  load() {\n    abstract();\n  }\n}\n\nexport default ImageBase;\n","/**\n * @module ol/ImageState\n */\n\n/**\n * @enum {number}\n */\nexport default {\n  IDLE: 0,\n  LOADING: 1,\n  LOADED: 2,\n  ERROR: 3,\n  EMPTY: 4,\n};\n","/**\n * @module ol/Image\n */\nimport EventType from './events/EventType.js';\nimport ImageBase from './ImageBase.js';\nimport ImageState from './ImageState.js';\nimport {IMAGE_DECODE} from './has.js';\nimport {getHeight} from './extent.js';\nimport {listenOnce, unlistenByKey} from './events.js';\n\n/**\n * A function that takes an {@link module:ol/Image~ImageWrapper} for the image and a\n * `{string}` for the src as arguments. It is supposed to make it so the\n * underlying image {@link module:ol/Image~ImageWrapper#getImage} is assigned the\n * content specified by the src. If not specified, the default is\n *\n *     function(image, src) {\n *       image.getImage().src = src;\n *     }\n *\n * Providing a custom `imageLoadFunction` can be useful to load images with\n * post requests or - in general - through XHR requests, where the src of the\n * image element would be set to a data URI when the content is loaded.\n *\n * @typedef {function(ImageWrapper, string): void} LoadFunction\n * @api\n */\n\nclass ImageWrapper extends ImageBase {\n  /**\n   * @param {import(\"./extent.js\").Extent} extent Extent.\n   * @param {number|undefined} resolution Resolution.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {string} src Image source URI.\n   * @param {?string} crossOrigin Cross origin.\n   * @param {LoadFunction} imageLoadFunction Image load function.\n   * @param {CanvasRenderingContext2D} [context] Canvas context. When provided, the image will be\n   *    drawn into the context's canvas, and `getImage()` will return the canvas once the image\n   *    has finished loading.\n   */\n  constructor(\n    extent,\n    resolution,\n    pixelRatio,\n    src,\n    crossOrigin,\n    imageLoadFunction,\n    context\n  ) {\n    super(extent, resolution, pixelRatio, ImageState.IDLE);\n\n    /**\n     * @private\n     * @type {string}\n     */\n    this.src_ = src;\n\n    /**\n     * @private\n     * @type {HTMLCanvasElement|HTMLImageElement|HTMLVideoElement}\n     */\n    this.image_ = new Image();\n    if (crossOrigin !== null) {\n      this.image_.crossOrigin = crossOrigin;\n    }\n\n    /**\n     * @private\n     * @type {CanvasRenderingContext2D}\n     */\n    this.context_ = context;\n\n    /**\n     * @private\n     * @type {?function():void}\n     */\n    this.unlisten_ = null;\n\n    /**\n     * @protected\n     * @type {import(\"./ImageState.js\").default}\n     */\n    this.state = ImageState.IDLE;\n\n    /**\n     * @private\n     * @type {LoadFunction}\n     */\n    this.imageLoadFunction_ = imageLoadFunction;\n  }\n\n  /**\n   * @return {HTMLCanvasElement|HTMLImageElement|HTMLVideoElement} Image.\n   * @api\n   */\n  getImage() {\n    if (\n      this.state == ImageState.LOADED &&\n      this.context_ &&\n      !(this.image_ instanceof HTMLCanvasElement)\n    ) {\n      const canvas = this.context_.canvas;\n      canvas.width = this.image_.width;\n      canvas.height = this.image_.height;\n      this.context_.drawImage(this.image_, 0, 0);\n      this.image_ = this.context_.canvas;\n    }\n    return this.image_;\n  }\n\n  /**\n   * Tracks loading or read errors.\n   *\n   * @private\n   */\n  handleImageError_() {\n    this.state = ImageState.ERROR;\n    this.unlistenImage_();\n    this.changed();\n  }\n\n  /**\n   * Tracks successful image load.\n   *\n   * @private\n   */\n  handleImageLoad_() {\n    if (this.resolution === undefined) {\n      this.resolution = getHeight(this.extent) / this.image_.height;\n    }\n    this.state = ImageState.LOADED;\n    this.unlistenImage_();\n    this.changed();\n  }\n\n  /**\n   * Load the image or retry if loading previously failed.\n   * Loading is taken care of by the tile queue, and calling this method is\n   * only needed for preloading or for reloading in case of an error.\n   * @api\n   */\n  load() {\n    if (this.state == ImageState.IDLE || this.state == ImageState.ERROR) {\n      this.state = ImageState.LOADING;\n      this.changed();\n      this.imageLoadFunction_(this, this.src_);\n      this.unlisten_ = listenImage(\n        this.image_,\n        this.handleImageLoad_.bind(this),\n        this.handleImageError_.bind(this)\n      );\n    }\n  }\n\n  /**\n   * @param {HTMLCanvasElement|HTMLImageElement|HTMLVideoElement} image Image.\n   */\n  setImage(image) {\n    this.image_ = image;\n    this.resolution = getHeight(this.extent) / this.image_.height;\n  }\n\n  /**\n   * Discards event handlers which listen for load completion or errors.\n   *\n   * @private\n   */\n  unlistenImage_() {\n    if (this.unlisten_) {\n      this.unlisten_();\n      this.unlisten_ = null;\n    }\n  }\n}\n\n/**\n * @param {HTMLCanvasElement|HTMLImageElement|HTMLVideoElement} image Image element.\n * @param {function():any} loadHandler Load callback function.\n * @param {function():any} errorHandler Error callback function.\n * @return {function():void} Callback to stop listening.\n */\nexport function listenImage(image, loadHandler, errorHandler) {\n  const img = /** @type {HTMLImageElement} */ (image);\n  let listening = true;\n  let decoding = false;\n  let loaded = false;\n\n  const listenerKeys = [\n    listenOnce(img, EventType.LOAD, function () {\n      loaded = true;\n      if (!decoding) {\n        loadHandler();\n      }\n    }),\n  ];\n\n  if (img.src && IMAGE_DECODE) {\n    decoding = true;\n    img\n      .decode()\n      .then(function () {\n        if (listening) {\n          loadHandler();\n        }\n      })\n      .catch(function (error) {\n        if (listening) {\n          if (loaded) {\n            loadHandler();\n          } else {\n            errorHandler();\n          }\n        }\n      });\n  } else {\n    listenerKeys.push(listenOnce(img, EventType.ERROR, errorHandler));\n  }\n\n  return function unlisten() {\n    listening = false;\n    listenerKeys.forEach(unlistenByKey);\n  };\n}\n\nexport default ImageWrapper;\n","/**\n * @module ol/ImageCanvas\n */\nimport ImageBase from './ImageBase.js';\nimport ImageState from './ImageState.js';\n\n/**\n * A function that is called to trigger asynchronous canvas drawing.  It is\n * called with a \"done\" callback that should be called when drawing is done.\n * If any error occurs during drawing, the \"done\" callback should be called with\n * that error.\n *\n * @typedef {function(function(Error=): void): void} Loader\n */\n\nclass ImageCanvas extends ImageBase {\n  /**\n   * @param {import(\"./extent.js\").Extent} extent Extent.\n   * @param {number} resolution Resolution.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {HTMLCanvasElement} canvas Canvas.\n   * @param {Loader} [loader] Optional loader function to\n   *     support asynchronous canvas drawing.\n   */\n  constructor(extent, resolution, pixelRatio, canvas, loader) {\n    const state = loader !== undefined ? ImageState.IDLE : ImageState.LOADED;\n\n    super(extent, resolution, pixelRatio, state);\n\n    /**\n     * Optional canvas loader function.\n     * @type {?Loader}\n     * @private\n     */\n    this.loader_ = loader !== undefined ? loader : null;\n\n    /**\n     * @private\n     * @type {HTMLCanvasElement}\n     */\n    this.canvas_ = canvas;\n\n    /**\n     * @private\n     * @type {?Error}\n     */\n    this.error_ = null;\n  }\n\n  /**\n   * Get any error associated with asynchronous rendering.\n   * @return {?Error} Any error that occurred during rendering.\n   */\n  getError() {\n    return this.error_;\n  }\n\n  /**\n   * Handle async drawing complete.\n   * @param {Error} [err] Any error during drawing.\n   * @private\n   */\n  handleLoad_(err) {\n    if (err) {\n      this.error_ = err;\n      this.state = ImageState.ERROR;\n    } else {\n      this.state = ImageState.LOADED;\n    }\n    this.changed();\n  }\n\n  /**\n   * Load not yet loaded URI.\n   */\n  load() {\n    if (this.state == ImageState.IDLE) {\n      this.state = ImageState.LOADING;\n      this.changed();\n      this.loader_(this.handleLoad_.bind(this));\n    }\n  }\n\n  /**\n   * @return {HTMLCanvasElement} Canvas element.\n   */\n  getImage() {\n    return this.canvas_;\n  }\n}\n\nexport default ImageCanvas;\n","/**\n * @module ol/ImageTile\n */\nimport Tile from './Tile.js';\nimport TileState from './TileState.js';\nimport {createCanvasContext2D} from './dom.js';\nimport {listenImage} from './Image.js';\n\nclass ImageTile extends Tile {\n  /**\n   * @param {import(\"./tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n   * @param {import(\"./TileState.js\").default} state State.\n   * @param {string} src Image source URI.\n   * @param {?string} crossOrigin Cross origin.\n   * @param {import(\"./Tile.js\").LoadFunction} tileLoadFunction Tile load function.\n   * @param {import(\"./Tile.js\").Options} [options] Tile options.\n   */\n  constructor(tileCoord, state, src, crossOrigin, tileLoadFunction, options) {\n    super(tileCoord, state, options);\n\n    /**\n     * @private\n     * @type {?string}\n     */\n    this.crossOrigin_ = crossOrigin;\n\n    /**\n     * Image URI\n     *\n     * @private\n     * @type {string}\n     */\n    this.src_ = src;\n\n    this.key = src;\n\n    /**\n     * @private\n     * @type {HTMLImageElement|HTMLCanvasElement}\n     */\n    this.image_ = new Image();\n    if (crossOrigin !== null) {\n      this.image_.crossOrigin = crossOrigin;\n    }\n\n    /**\n     * @private\n     * @type {?function():void}\n     */\n    this.unlisten_ = null;\n\n    /**\n     * @private\n     * @type {import(\"./Tile.js\").LoadFunction}\n     */\n    this.tileLoadFunction_ = tileLoadFunction;\n  }\n\n  /**\n   * Get the HTML image element for this tile (may be a Canvas, Image, or Video).\n   * @return {HTMLCanvasElement|HTMLImageElement|HTMLVideoElement} Image.\n   * @api\n   */\n  getImage() {\n    return this.image_;\n  }\n\n  /**\n   * Sets an HTML image element for this tile (may be a Canvas or preloaded Image).\n   * @param {HTMLCanvasElement|HTMLImageElement} element Element.\n   */\n  setImage(element) {\n    this.image_ = element;\n    this.state = TileState.LOADED;\n    this.unlistenImage_();\n    this.changed();\n  }\n\n  /**\n   * Tracks loading or read errors.\n   *\n   * @private\n   */\n  handleImageError_() {\n    this.state = TileState.ERROR;\n    this.unlistenImage_();\n    this.image_ = getBlankImage();\n    this.changed();\n  }\n\n  /**\n   * Tracks successful image load.\n   *\n   * @private\n   */\n  handleImageLoad_() {\n    const image = /** @type {HTMLImageElement} */ (this.image_);\n    if (image.naturalWidth && image.naturalHeight) {\n      this.state = TileState.LOADED;\n    } else {\n      this.state = TileState.EMPTY;\n    }\n    this.unlistenImage_();\n    this.changed();\n  }\n\n  /**\n   * Load the image or retry if loading previously failed.\n   * Loading is taken care of by the tile queue, and calling this method is\n   * only needed for preloading or for reloading in case of an error.\n   *\n   * To retry loading tiles on failed requests, use a custom `tileLoadFunction`\n   * that checks for error status codes and reloads only when the status code is\n   * 408, 429, 500, 502, 503 and 504, and only when not too many retries have been\n   * made already:\n   *\n   * ```js\n   * const retryCodes = [408, 429, 500, 502, 503, 504];\n   * const retries = {};\n   * source.setTileLoadFunction((tile, src) => {\n   *   const image = tile.getImage();\n   *   fetch(src)\n   *     .then((response) => {\n   *       if (retryCodes.includes(response.status)) {\n   *         retries[src] = (retries[src] || 0) + 1;\n   *         if (retries[src] <= 3) {\n   *           setTimeout(() => tile.load(), retries[src] * 1000);\n   *         }\n   *         return Promise.reject();\n   *       }\n   *       return response.blob();\n   *     })\n   *     .then((blob) => {\n   *       const imageUrl = URL.createObjectURL(blob);\n   *       image.src = imageUrl;\n   *       setTimeout(() => URL.revokeObjectURL(imageUrl), 5000);\n   *     })\n   *     .catch(() => tile.setState(3)); // error\n   * });\n   * ```\n   *\n   * @api\n   */\n  load() {\n    if (this.state == TileState.ERROR) {\n      this.state = TileState.IDLE;\n      this.image_ = new Image();\n      if (this.crossOrigin_ !== null) {\n        this.image_.crossOrigin = this.crossOrigin_;\n      }\n    }\n    if (this.state == TileState.IDLE) {\n      this.state = TileState.LOADING;\n      this.changed();\n      this.tileLoadFunction_(this, this.src_);\n      this.unlisten_ = listenImage(\n        this.image_,\n        this.handleImageLoad_.bind(this),\n        this.handleImageError_.bind(this)\n      );\n    }\n  }\n\n  /**\n   * Discards event handlers which listen for load completion or errors.\n   *\n   * @private\n   */\n  unlistenImage_() {\n    if (this.unlisten_) {\n      this.unlisten_();\n      this.unlisten_ = null;\n    }\n  }\n}\n\n/**\n * Get a 1-pixel blank image.\n * @return {HTMLCanvasElement} Blank image.\n */\nfunction getBlankImage() {\n  const ctx = createCanvasContext2D(1, 1);\n  ctx.fillStyle = 'rgba(0,0,0,0)';\n  ctx.fillRect(0, 0, 1, 1);\n  return ctx.canvas;\n}\n\nexport default ImageTile;\n","/**\n * @module ol/Kinetic\n */\n\n/**\n * @classdesc\n * Implementation of inertial deceleration for map movement.\n *\n * @api\n */\nclass Kinetic {\n  /**\n   * @param {number} decay Rate of decay (must be negative).\n   * @param {number} minVelocity Minimum velocity (pixels/millisecond).\n   * @param {number} delay Delay to consider to calculate the kinetic\n   *     initial values (milliseconds).\n   */\n  constructor(decay, minVelocity, delay) {\n    /**\n     * @private\n     * @type {number}\n     */\n    this.decay_ = decay;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.minVelocity_ = minVelocity;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.delay_ = delay;\n\n    /**\n     * @private\n     * @type {Array<number>}\n     */\n    this.points_ = [];\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.angle_ = 0;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.initialVelocity_ = 0;\n  }\n\n  /**\n   * FIXME empty description for jsdoc\n   */\n  begin() {\n    this.points_.length = 0;\n    this.angle_ = 0;\n    this.initialVelocity_ = 0;\n  }\n\n  /**\n   * @param {number} x X.\n   * @param {number} y Y.\n   */\n  update(x, y) {\n    this.points_.push(x, y, Date.now());\n  }\n\n  /**\n   * @return {boolean} Whether we should do kinetic animation.\n   */\n  end() {\n    if (this.points_.length < 6) {\n      // at least 2 points are required (i.e. there must be at least 6 elements\n      // in the array)\n      return false;\n    }\n    const delay = Date.now() - this.delay_;\n    const lastIndex = this.points_.length - 3;\n    if (this.points_[lastIndex + 2] < delay) {\n      // the last tracked point is too old, which means that the user stopped\n      // panning before releasing the map\n      return false;\n    }\n\n    // get the first point which still falls into the delay time\n    let firstIndex = lastIndex - 3;\n    while (firstIndex > 0 && this.points_[firstIndex + 2] > delay) {\n      firstIndex -= 3;\n    }\n\n    const duration = this.points_[lastIndex + 2] - this.points_[firstIndex + 2];\n    // we don't want a duration of 0 (divide by zero)\n    // we also make sure the user panned for a duration of at least one frame\n    // (1/60s) to compute sane displacement values\n    if (duration < 1000 / 60) {\n      return false;\n    }\n\n    const dx = this.points_[lastIndex] - this.points_[firstIndex];\n    const dy = this.points_[lastIndex + 1] - this.points_[firstIndex + 1];\n    this.angle_ = Math.atan2(dy, dx);\n    this.initialVelocity_ = Math.sqrt(dx * dx + dy * dy) / duration;\n    return this.initialVelocity_ > this.minVelocity_;\n  }\n\n  /**\n   * @return {number} Total distance travelled (pixels).\n   */\n  getDistance() {\n    return (this.minVelocity_ - this.initialVelocity_) / this.decay_;\n  }\n\n  /**\n   * @return {number} Angle of the kinetic panning animation (radians).\n   */\n  getAngle() {\n    return this.angle_;\n  }\n}\n\nexport default Kinetic;\n","/**\n * @module ol/color\n */\nimport {assert} from './asserts.js';\nimport {clamp} from './math.js';\n\n/**\n * A color represented as a short array [red, green, blue, alpha].\n * red, green, and blue should be integers in the range 0..255 inclusive.\n * alpha should be a float in the range 0..1 inclusive. If no alpha value is\n * given then `1` will be used.\n * @typedef {Array<number>} Color\n * @api\n */\n\n/**\n * This RegExp matches # followed by 3, 4, 6, or 8 hex digits.\n * @const\n * @type {RegExp}\n * @private\n */\nconst HEX_COLOR_RE_ = /^#([a-f0-9]{3}|[a-f0-9]{4}(?:[a-f0-9]{2}){0,2})$/i;\n\n/**\n * Regular expression for matching potential named color style strings.\n * @const\n * @type {RegExp}\n * @private\n */\nconst NAMED_COLOR_RE_ = /^([a-z]*)$|^hsla?\\(.*\\)$/i;\n\n/**\n * Return the color as an rgba string.\n * @param {Color|string} color Color.\n * @return {string} Rgba string.\n * @api\n */\nexport function asString(color) {\n  if (typeof color === 'string') {\n    return color;\n  }\n  return toString(color);\n}\n\n/**\n * Return named color as an rgba string.\n * @param {string} color Named color.\n * @return {string} Rgb string.\n */\nfunction fromNamed(color) {\n  const el = document.createElement('div');\n  el.style.color = color;\n  if (el.style.color !== '') {\n    document.body.appendChild(el);\n    const rgb = getComputedStyle(el).color;\n    document.body.removeChild(el);\n    return rgb;\n  }\n  return '';\n}\n\n/**\n * @param {string} s String.\n * @return {Color} Color.\n */\nexport const fromString = (function () {\n  // We maintain a small cache of parsed strings.  To provide cheap LRU-like\n  // semantics, whenever the cache grows too large we simply delete an\n  // arbitrary 25% of the entries.\n\n  /**\n   * @const\n   * @type {number}\n   */\n  const MAX_CACHE_SIZE = 1024;\n\n  /**\n   * @type {Object<string, Color>}\n   */\n  const cache = {};\n\n  /**\n   * @type {number}\n   */\n  let cacheSize = 0;\n\n  return (\n    /**\n     * @param {string} s String.\n     * @return {Color} Color.\n     */\n    function (s) {\n      let color;\n      if (cache.hasOwnProperty(s)) {\n        color = cache[s];\n      } else {\n        if (cacheSize >= MAX_CACHE_SIZE) {\n          let i = 0;\n          for (const key in cache) {\n            if ((i++ & 3) === 0) {\n              delete cache[key];\n              --cacheSize;\n            }\n          }\n        }\n        color = fromStringInternal_(s);\n        cache[s] = color;\n        ++cacheSize;\n      }\n      return color;\n    }\n  );\n})();\n\n/**\n * Return the color as an array. This function maintains a cache of calculated\n * arrays which means the result should not be modified.\n * @param {Color|string} color Color.\n * @return {Color} Color.\n * @api\n */\nexport function asArray(color) {\n  if (Array.isArray(color)) {\n    return color;\n  }\n  return fromString(color);\n}\n\n/**\n * @param {string} s String.\n * @private\n * @return {Color} Color.\n */\nfunction fromStringInternal_(s) {\n  let r, g, b, a, color;\n\n  if (NAMED_COLOR_RE_.exec(s)) {\n    s = fromNamed(s);\n  }\n\n  if (HEX_COLOR_RE_.exec(s)) {\n    // hex\n    const n = s.length - 1; // number of hex digits\n    let d; // number of digits per channel\n    if (n <= 4) {\n      d = 1;\n    } else {\n      d = 2;\n    }\n    const hasAlpha = n === 4 || n === 8;\n    r = parseInt(s.substr(1 + 0 * d, d), 16);\n    g = parseInt(s.substr(1 + 1 * d, d), 16);\n    b = parseInt(s.substr(1 + 2 * d, d), 16);\n    if (hasAlpha) {\n      a = parseInt(s.substr(1 + 3 * d, d), 16);\n    } else {\n      a = 255;\n    }\n    if (d == 1) {\n      r = (r << 4) + r;\n      g = (g << 4) + g;\n      b = (b << 4) + b;\n      if (hasAlpha) {\n        a = (a << 4) + a;\n      }\n    }\n    color = [r, g, b, a / 255];\n  } else if (s.startsWith('rgba(')) {\n    // rgba()\n    color = s.slice(5, -1).split(',').map(Number);\n    normalize(color);\n  } else if (s.startsWith('rgb(')) {\n    // rgb()\n    color = s.slice(4, -1).split(',').map(Number);\n    color.push(1);\n    normalize(color);\n  } else {\n    assert(false, 14); // Invalid color\n  }\n  return color;\n}\n\n/**\n * TODO this function is only used in the test, we probably shouldn't export it\n * @param {Color} color Color.\n * @return {Color} Clamped color.\n */\nexport function normalize(color) {\n  color[0] = clamp((color[0] + 0.5) | 0, 0, 255);\n  color[1] = clamp((color[1] + 0.5) | 0, 0, 255);\n  color[2] = clamp((color[2] + 0.5) | 0, 0, 255);\n  color[3] = clamp(color[3], 0, 1);\n  return color;\n}\n\n/**\n * @param {Color} color Color.\n * @return {string} String.\n */\nexport function toString(color) {\n  let r = color[0];\n  if (r != (r | 0)) {\n    r = (r + 0.5) | 0;\n  }\n  let g = color[1];\n  if (g != (g | 0)) {\n    g = (g + 0.5) | 0;\n  }\n  let b = color[2];\n  if (b != (b | 0)) {\n    b = (b + 0.5) | 0;\n  }\n  const a = color[3] === undefined ? 1 : Math.round(color[3] * 100) / 100;\n  return 'rgba(' + r + ',' + g + ',' + b + ',' + a + ')';\n}\n\n/**\n * @param {string} s String.\n * @return {boolean} Whether the string is actually a valid color\n */\nexport function isStringColor(s) {\n  if (NAMED_COLOR_RE_.test(s)) {\n    s = fromNamed(s);\n  }\n  return HEX_COLOR_RE_.test(s) || s.startsWith('rgba(') || s.startsWith('rgb(');\n}\n","/**\n * @module ol/style/IconImageCache\n */\nimport {asString} from '../color.js';\n\n/**\n * @classdesc\n * Singleton class. Available through {@link module:ol/style/IconImageCache.shared}.\n */\nclass IconImageCache {\n  constructor() {\n    /**\n     * @type {!Object<string, import(\"./IconImage.js\").default>}\n     * @private\n     */\n    this.cache_ = {};\n\n    /**\n     * @type {number}\n     * @private\n     */\n    this.cacheSize_ = 0;\n\n    /**\n     * @type {number}\n     * @private\n     */\n    this.maxCacheSize_ = 32;\n  }\n\n  /**\n   * FIXME empty description for jsdoc\n   */\n  clear() {\n    this.cache_ = {};\n    this.cacheSize_ = 0;\n  }\n\n  /**\n   * @return {boolean} Can expire cache.\n   */\n  canExpireCache() {\n    return this.cacheSize_ > this.maxCacheSize_;\n  }\n\n  /**\n   * FIXME empty description for jsdoc\n   */\n  expire() {\n    if (this.canExpireCache()) {\n      let i = 0;\n      for (const key in this.cache_) {\n        const iconImage = this.cache_[key];\n        if ((i++ & 3) === 0 && !iconImage.hasListener()) {\n          delete this.cache_[key];\n          --this.cacheSize_;\n        }\n      }\n    }\n  }\n\n  /**\n   * @param {string} src Src.\n   * @param {?string} crossOrigin Cross origin.\n   * @param {import(\"../color.js\").Color} color Color.\n   * @return {import(\"./IconImage.js\").default} Icon image.\n   */\n  get(src, crossOrigin, color) {\n    const key = getKey(src, crossOrigin, color);\n    return key in this.cache_ ? this.cache_[key] : null;\n  }\n\n  /**\n   * @param {string} src Src.\n   * @param {?string} crossOrigin Cross origin.\n   * @param {import(\"../color.js\").Color} color Color.\n   * @param {import(\"./IconImage.js\").default} iconImage Icon image.\n   */\n  set(src, crossOrigin, color, iconImage) {\n    const key = getKey(src, crossOrigin, color);\n    this.cache_[key] = iconImage;\n    ++this.cacheSize_;\n  }\n\n  /**\n   * Set the cache size of the icon cache. Default is `32`. Change this value when\n   * your map uses more than 32 different icon images and you are not caching icon\n   * styles on the application level.\n   * @param {number} maxCacheSize Cache max size.\n   * @api\n   */\n  setSize(maxCacheSize) {\n    this.maxCacheSize_ = maxCacheSize;\n    this.expire();\n  }\n}\n\n/**\n * @param {string} src Src.\n * @param {?string} crossOrigin Cross origin.\n * @param {import(\"../color.js\").Color} color Color.\n * @return {string} Cache key.\n */\nfunction getKey(src, crossOrigin, color) {\n  const colorString = color ? asString(color) : 'null';\n  return crossOrigin + ':' + src + ':' + colorString;\n}\n\nexport default IconImageCache;\n\n/**\n * The {@link module:ol/style/IconImageCache~IconImageCache} for\n * {@link module:ol/style/Icon~Icon} images.\n * @api\n */\nexport const shared = new IconImageCache();\n","/**\n * @module ol/layer/Property\n */\n\n/**\n * @enum {string}\n */\nexport default {\n  OPACITY: 'opacity',\n  VISIBLE: 'visible',\n  EXTENT: 'extent',\n  Z_INDEX: 'zIndex',\n  MAX_RESOLUTION: 'maxResolution',\n  MIN_RESOLUTION: 'minResolution',\n  MAX_ZOOM: 'maxZoom',\n  MIN_ZOOM: 'minZoom',\n  SOURCE: 'source',\n  MAP: 'map',\n};\n","/**\n * @module ol/layer/Base\n */\nimport BaseObject from '../Object.js';\nimport LayerProperty from './Property.js';\nimport {abstract} from '../util.js';\nimport {assert} from '../asserts.js';\nimport {clamp} from '../math.js';\n\n/**\n * A css color, or a function called with a view resolution returning a css color.\n *\n * @typedef {string|function(number):string} BackgroundColor\n * @api\n */\n\n/**\n * @typedef {import(\"../ObjectEventType\").Types|'change:extent'|'change:maxResolution'|'change:maxZoom'|\n *    'change:minResolution'|'change:minZoom'|'change:opacity'|'change:visible'|'change:zIndex'} BaseLayerObjectEventTypes\n */\n\n/***\n * @template Return\n * @typedef {import(\"../Observable\").OnSignature<import(\"../Observable\").EventTypes, import(\"../events/Event.js\").default, Return> &\n *   import(\"../Observable\").OnSignature<BaseLayerObjectEventTypes, import(\"../Object\").ObjectEvent, Return> &\n *   import(\"../Observable\").CombinedOnSignature<import(\"../Observable\").EventTypes|BaseLayerObjectEventTypes, Return>} BaseLayerOnSignature\n */\n\n/**\n * @typedef {Object} Options\n * @property {string} [className='ol-layer'] A CSS class name to set to the layer element.\n * @property {number} [opacity=1] Opacity (0, 1).\n * @property {boolean} [visible=true] Visibility.\n * @property {import(\"../extent.js\").Extent} [extent] The bounding extent for layer rendering.  The layer will not be\n * rendered outside of this extent.\n * @property {number} [zIndex] The z-index for layer rendering.  At rendering time, the layers\n * will be ordered, first by Z-index and then by position. When `undefined`, a `zIndex` of 0 is assumed\n * for layers that are added to the map's `layers` collection, or `Infinity` when the layer's `setMap()`\n * method was used.\n * @property {number} [minResolution] The minimum resolution (inclusive) at which this layer will be\n * visible.\n * @property {number} [maxResolution] The maximum resolution (exclusive) below which this layer will\n * be visible.\n * @property {number} [minZoom] The minimum view zoom level (exclusive) above which this layer will be\n * visible.\n * @property {number} [maxZoom] The maximum view zoom level (inclusive) at which this layer will\n * be visible.\n * @property {BackgroundColor} [background] Background color for the layer. If not specified, no background\n * will be rendered.\n * @property {Object<string, *>} [properties] Arbitrary observable properties. Can be accessed with `#get()` and `#set()`.\n */\n\n/**\n * @classdesc\n * Abstract base class; normally only used for creating subclasses and not\n * instantiated in apps.\n * Note that with {@link module:ol/layer/Base~BaseLayer} and all its subclasses, any property set in\n * the options is set as a {@link module:ol/Object~BaseObject} property on the layer object, so\n * is observable, and has get/set accessors.\n *\n * @api\n */\nclass BaseLayer extends BaseObject {\n  /**\n   * @param {Options} options Layer options.\n   */\n  constructor(options) {\n    super();\n\n    /***\n     * @type {BaseLayerOnSignature<import(\"../events\").EventsKey>}\n     */\n    this.on;\n\n    /***\n     * @type {BaseLayerOnSignature<import(\"../events\").EventsKey>}\n     */\n    this.once;\n\n    /***\n     * @type {BaseLayerOnSignature<void>}\n     */\n    this.un;\n\n    /**\n     * @type {BackgroundColor|false}\n     * @private\n     */\n    this.background_ = options.background;\n\n    /**\n     * @type {Object<string, *>}\n     */\n    const properties = Object.assign({}, options);\n    if (typeof options.properties === 'object') {\n      delete properties.properties;\n      Object.assign(properties, options.properties);\n    }\n\n    properties[LayerProperty.OPACITY] =\n      options.opacity !== undefined ? options.opacity : 1;\n    assert(typeof properties[LayerProperty.OPACITY] === 'number', 64); // Layer opacity must be a number\n\n    properties[LayerProperty.VISIBLE] =\n      options.visible !== undefined ? options.visible : true;\n    properties[LayerProperty.Z_INDEX] = options.zIndex;\n    properties[LayerProperty.MAX_RESOLUTION] =\n      options.maxResolution !== undefined ? options.maxResolution : Infinity;\n    properties[LayerProperty.MIN_RESOLUTION] =\n      options.minResolution !== undefined ? options.minResolution : 0;\n    properties[LayerProperty.MIN_ZOOM] =\n      options.minZoom !== undefined ? options.minZoom : -Infinity;\n    properties[LayerProperty.MAX_ZOOM] =\n      options.maxZoom !== undefined ? options.maxZoom : Infinity;\n\n    /**\n     * @type {string}\n     * @private\n     */\n    this.className_ =\n      properties.className !== undefined ? properties.className : 'ol-layer';\n    delete properties.className;\n\n    this.setProperties(properties);\n\n    /**\n     * @type {import(\"./Layer.js\").State}\n     * @private\n     */\n    this.state_ = null;\n  }\n\n  /**\n   * Get the background for this layer.\n   * @return {BackgroundColor|false} Layer background.\n   */\n  getBackground() {\n    return this.background_;\n  }\n\n  /**\n   * @return {string} CSS class name.\n   */\n  getClassName() {\n    return this.className_;\n  }\n\n  /**\n   * This method is not meant to be called by layers or layer renderers because the state\n   * is incorrect if the layer is included in a layer group.\n   *\n   * @param {boolean} [managed] Layer is managed.\n   * @return {import(\"./Layer.js\").State} Layer state.\n   */\n  getLayerState(managed) {\n    /** @type {import(\"./Layer.js\").State} */\n    const state =\n      this.state_ ||\n      /** @type {?} */ ({\n        layer: this,\n        managed: managed === undefined ? true : managed,\n      });\n    const zIndex = this.getZIndex();\n    state.opacity = clamp(Math.round(this.getOpacity() * 100) / 100, 0, 1);\n    state.visible = this.getVisible();\n    state.extent = this.getExtent();\n    state.zIndex = zIndex === undefined && !state.managed ? Infinity : zIndex;\n    state.maxResolution = this.getMaxResolution();\n    state.minResolution = Math.max(this.getMinResolution(), 0);\n    state.minZoom = this.getMinZoom();\n    state.maxZoom = this.getMaxZoom();\n    this.state_ = state;\n\n    return state;\n  }\n\n  /**\n   * @abstract\n   * @param {Array<import(\"./Layer.js\").default>} [array] Array of layers (to be\n   *     modified in place).\n   * @return {Array<import(\"./Layer.js\").default>} Array of layers.\n   */\n  getLayersArray(array) {\n    return abstract();\n  }\n\n  /**\n   * @abstract\n   * @param {Array<import(\"./Layer.js\").State>} [states] Optional list of layer\n   *     states (to be modified in place).\n   * @return {Array<import(\"./Layer.js\").State>} List of layer states.\n   */\n  getLayerStatesArray(states) {\n    return abstract();\n  }\n\n  /**\n   * Return the {@link module:ol/extent~Extent extent} of the layer or `undefined` if it\n   * will be visible regardless of extent.\n   * @return {import(\"../extent.js\").Extent|undefined} The layer extent.\n   * @observable\n   * @api\n   */\n  getExtent() {\n    return /** @type {import(\"../extent.js\").Extent|undefined} */ (\n      this.get(LayerProperty.EXTENT)\n    );\n  }\n\n  /**\n   * Return the maximum resolution of the layer.\n   * @return {number} The maximum resolution of the layer.\n   * @observable\n   * @api\n   */\n  getMaxResolution() {\n    return /** @type {number} */ (this.get(LayerProperty.MAX_RESOLUTION));\n  }\n\n  /**\n   * Return the minimum resolution of the layer.\n   * @return {number} The minimum resolution of the layer.\n   * @observable\n   * @api\n   */\n  getMinResolution() {\n    return /** @type {number} */ (this.get(LayerProperty.MIN_RESOLUTION));\n  }\n\n  /**\n   * Return the minimum zoom level of the layer.\n   * @return {number} The minimum zoom level of the layer.\n   * @observable\n   * @api\n   */\n  getMinZoom() {\n    return /** @type {number} */ (this.get(LayerProperty.MIN_ZOOM));\n  }\n\n  /**\n   * Return the maximum zoom level of the layer.\n   * @return {number} The maximum zoom level of the layer.\n   * @observable\n   * @api\n   */\n  getMaxZoom() {\n    return /** @type {number} */ (this.get(LayerProperty.MAX_ZOOM));\n  }\n\n  /**\n   * Return the opacity of the layer (between 0 and 1).\n   * @return {number} The opacity of the layer.\n   * @observable\n   * @api\n   */\n  getOpacity() {\n    return /** @type {number} */ (this.get(LayerProperty.OPACITY));\n  }\n\n  /**\n   * @abstract\n   * @return {import(\"../source/Source.js\").State} Source state.\n   */\n  getSourceState() {\n    return abstract();\n  }\n\n  /**\n   * Return the value of this layer's `visible` property. To find out whether the layer\n   * is visible on a map, use `isVisible()` instead.\n   * @return {boolean} The value of the `visible` property of the layer.\n   * @observable\n   * @api\n   */\n  getVisible() {\n    return /** @type {boolean} */ (this.get(LayerProperty.VISIBLE));\n  }\n\n  /**\n   * Return the Z-index of the layer, which is used to order layers before\n   * rendering. The default Z-index is 0.\n   * @return {number} The Z-index of the layer.\n   * @observable\n   * @api\n   */\n  getZIndex() {\n    return /** @type {number} */ (this.get(LayerProperty.Z_INDEX));\n  }\n\n  /**\n   * Sets the background color.\n   * @param {BackgroundColor} [background] Background color.\n   */\n  setBackground(background) {\n    this.background_ = background;\n    this.changed();\n  }\n\n  /**\n   * Set the extent at which the layer is visible.  If `undefined`, the layer\n   * will be visible at all extents.\n   * @param {import(\"../extent.js\").Extent|undefined} extent The extent of the layer.\n   * @observable\n   * @api\n   */\n  setExtent(extent) {\n    this.set(LayerProperty.EXTENT, extent);\n  }\n\n  /**\n   * Set the maximum resolution at which the layer is visible.\n   * @param {number} maxResolution The maximum resolution of the layer.\n   * @observable\n   * @api\n   */\n  setMaxResolution(maxResolution) {\n    this.set(LayerProperty.MAX_RESOLUTION, maxResolution);\n  }\n\n  /**\n   * Set the minimum resolution at which the layer is visible.\n   * @param {number} minResolution The minimum resolution of the layer.\n   * @observable\n   * @api\n   */\n  setMinResolution(minResolution) {\n    this.set(LayerProperty.MIN_RESOLUTION, minResolution);\n  }\n\n  /**\n   * Set the maximum zoom (exclusive) at which the layer is visible.\n   * Note that the zoom levels for layer visibility are based on the\n   * view zoom level, which may be different from a tile source zoom level.\n   * @param {number} maxZoom The maximum zoom of the layer.\n   * @observable\n   * @api\n   */\n  setMaxZoom(maxZoom) {\n    this.set(LayerProperty.MAX_ZOOM, maxZoom);\n  }\n\n  /**\n   * Set the minimum zoom (inclusive) at which the layer is visible.\n   * Note that the zoom levels for layer visibility are based on the\n   * view zoom level, which may be different from a tile source zoom level.\n   * @param {number} minZoom The minimum zoom of the layer.\n   * @observable\n   * @api\n   */\n  setMinZoom(minZoom) {\n    this.set(LayerProperty.MIN_ZOOM, minZoom);\n  }\n\n  /**\n   * Set the opacity of the layer, allowed values range from 0 to 1.\n   * @param {number} opacity The opacity of the layer.\n   * @observable\n   * @api\n   */\n  setOpacity(opacity) {\n    assert(typeof opacity === 'number', 64); // Layer opacity must be a number\n    this.set(LayerProperty.OPACITY, opacity);\n  }\n\n  /**\n   * Set the visibility of the layer (`true` or `false`).\n   * @param {boolean} visible The visibility of the layer.\n   * @observable\n   * @api\n   */\n  setVisible(visible) {\n    this.set(LayerProperty.VISIBLE, visible);\n  }\n\n  /**\n   * Set Z-index of the layer, which is used to order layers before rendering.\n   * The default Z-index is 0.\n   * @param {number} zindex The z-index of the layer.\n   * @observable\n   * @api\n   */\n  setZIndex(zindex) {\n    this.set(LayerProperty.Z_INDEX, zindex);\n  }\n\n  /**\n   * Clean up.\n   */\n  disposeInternal() {\n    if (this.state_) {\n      this.state_.layer = null;\n      this.state_ = null;\n    }\n    super.disposeInternal();\n  }\n}\n\nexport default BaseLayer;\n","/**\n * @module ol/render/EventType\n */\n\n/**\n * @enum {string}\n */\nexport default {\n  /**\n   * Triggered before a layer is rendered.\n   * @event module:ol/render/Event~RenderEvent#prerender\n   * @api\n   */\n  PRERENDER: 'prerender',\n\n  /**\n   * Triggered after a layer is rendered.\n   * @event module:ol/render/Event~RenderEvent#postrender\n   * @api\n   */\n  POSTRENDER: 'postrender',\n\n  /**\n   * Triggered before layers are composed.  When dispatched by the map, the event object will not have\n   * a `context` set.  When dispatched by a layer, the event object will have a `context` set.  Only\n   * WebGL layers currently dispatch this event.\n   * @event module:ol/render/Event~RenderEvent#precompose\n   * @api\n   */\n  PRECOMPOSE: 'precompose',\n\n  /**\n   * Triggered after layers are composed.  When dispatched by the map, the event object will not have\n   * a `context` set.  When dispatched by a layer, the event object will have a `context` set.  Only\n   * WebGL layers currently dispatch this event.\n   * @event module:ol/render/Event~RenderEvent#postcompose\n   * @api\n   */\n  POSTCOMPOSE: 'postcompose',\n\n  /**\n   * Triggered when rendering is complete, i.e. all sources and tiles have\n   * finished loading for the current viewport, and all tiles are faded in.\n   * The event object will not have a `context` set.\n   * @event module:ol/render/Event~RenderEvent#rendercomplete\n   * @api\n   */\n  RENDERCOMPLETE: 'rendercomplete',\n};\n\n/**\n * @typedef {'postrender'|'precompose'|'postcompose'|'rendercomplete'} MapRenderEventTypes\n */\n\n/**\n * @typedef {'postrender'|'prerender'} LayerRenderEventTypes\n */\n","/**\n * @module ol/ViewHint\n */\n\n/**\n * @enum {number}\n */\nexport default {\n  ANIMATING: 0,\n  INTERACTING: 1,\n};\n","/**\n * @module ol/ViewProperty\n */\n\n/**\n * @enum {string}\n */\nexport default {\n  CENTER: 'center',\n  RESOLUTION: 'resolution',\n  ROTATION: 'rotation',\n};\n","/**\n * @module ol/tilegrid/common\n */\n\n/**\n * Default maximum zoom for default tile grids.\n * @type {number}\n */\nexport const DEFAULT_MAX_ZOOM = 42;\n\n/**\n * Default tile size.\n * @type {number}\n */\nexport const DEFAULT_TILE_SIZE = 256;\n","/**\n * @module ol/centerconstraint\n */\nimport {clamp} from './math.js';\n\n/**\n * @typedef {function((import(\"./coordinate.js\").Coordinate|undefined), number, import(\"./size.js\").Size, boolean=, Array<number>=): (import(\"./coordinate.js\").Coordinate|undefined)} Type\n */\n\n/**\n * @param {import(\"./extent.js\").Extent} extent Extent.\n * @param {boolean} onlyCenter If true, the constraint will only apply to the view center.\n * @param {boolean} smooth If true, the view will be able to go slightly out of the given extent\n * (only during interaction and animation).\n * @return {Type} The constraint.\n */\nexport function createExtent(extent, onlyCenter, smooth) {\n  return (\n    /**\n     * @param {import(\"./coordinate.js\").Coordinate|undefined} center Center.\n     * @param {number|undefined} resolution Resolution.\n     * @param {import(\"./size.js\").Size} size Viewport size; unused if `onlyCenter` was specified.\n     * @param {boolean} [isMoving] True if an interaction or animation is in progress.\n     * @param {Array<number>} [centerShift] Shift between map center and viewport center.\n     * @return {import(\"./coordinate.js\").Coordinate|undefined} Center.\n     */\n    function (center, resolution, size, isMoving, centerShift) {\n      if (!center) {\n        return undefined;\n      }\n      if (!resolution && !onlyCenter) {\n        return center;\n      }\n      const viewWidth = onlyCenter ? 0 : size[0] * resolution;\n      const viewHeight = onlyCenter ? 0 : size[1] * resolution;\n      const shiftX = centerShift ? centerShift[0] : 0;\n      const shiftY = centerShift ? centerShift[1] : 0;\n      let minX = extent[0] + viewWidth / 2 + shiftX;\n      let maxX = extent[2] - viewWidth / 2 + shiftX;\n      let minY = extent[1] + viewHeight / 2 + shiftY;\n      let maxY = extent[3] - viewHeight / 2 + shiftY;\n\n      // note: when zooming out of bounds, min and max values for x and y may\n      // end up inverted (min > max); this has to be accounted for\n      if (minX > maxX) {\n        minX = (maxX + minX) / 2;\n        maxX = minX;\n      }\n      if (minY > maxY) {\n        minY = (maxY + minY) / 2;\n        maxY = minY;\n      }\n\n      let x = clamp(center[0], minX, maxX);\n      let y = clamp(center[1], minY, maxY);\n\n      // during an interaction, allow some overscroll\n      if (isMoving && smooth && resolution) {\n        const ratio = 30 * resolution;\n        x +=\n          -ratio * Math.log(1 + Math.max(0, minX - center[0]) / ratio) +\n          ratio * Math.log(1 + Math.max(0, center[0] - maxX) / ratio);\n        y +=\n          -ratio * Math.log(1 + Math.max(0, minY - center[1]) / ratio) +\n          ratio * Math.log(1 + Math.max(0, center[1] - maxY) / ratio);\n      }\n\n      return [x, y];\n    }\n  );\n}\n\n/**\n * @param {import(\"./coordinate.js\").Coordinate} [center] Center.\n * @return {import(\"./coordinate.js\").Coordinate|undefined} Center.\n */\nexport function none(center) {\n  return center;\n}\n","/**\n * @module ol/resolutionconstraint\n */\nimport {clamp} from './math.js';\nimport {getHeight, getWidth} from './extent.js';\nimport {linearFindNearest} from './array.js';\n\n/**\n * @typedef {function((number|undefined), number, import(\"./size.js\").Size, boolean=): (number|undefined)} Type\n */\n\n/**\n * Returns a modified resolution taking into account the viewport size and maximum\n * allowed extent.\n * @param {number} resolution Resolution\n * @param {import(\"./extent.js\").Extent} maxExtent Maximum allowed extent.\n * @param {import(\"./size.js\").Size} viewportSize Viewport size.\n * @param {boolean} showFullExtent Whether to show the full extent.\n * @return {number} Capped resolution.\n */\nfunction getViewportClampedResolution(\n  resolution,\n  maxExtent,\n  viewportSize,\n  showFullExtent\n) {\n  const xResolution = getWidth(maxExtent) / viewportSize[0];\n  const yResolution = getHeight(maxExtent) / viewportSize[1];\n\n  if (showFullExtent) {\n    return Math.min(resolution, Math.max(xResolution, yResolution));\n  }\n  return Math.min(resolution, Math.min(xResolution, yResolution));\n}\n\n/**\n * Returns a modified resolution to be between maxResolution and minResolution while\n * still allowing the value to be slightly out of bounds.\n * Note: the computation is based on the logarithm function (ln):\n *  - at 1, ln(x) is 0\n *  - above 1, ln(x) keeps increasing but at a much slower pace than x\n * The final result is clamped to prevent getting too far away from bounds.\n * @param {number} resolution Resolution.\n * @param {number} maxResolution Max resolution.\n * @param {number} minResolution Min resolution.\n * @return {number} Smoothed resolution.\n */\nfunction getSmoothClampedResolution(resolution, maxResolution, minResolution) {\n  let result = Math.min(resolution, maxResolution);\n  const ratio = 50;\n\n  result *=\n    Math.log(1 + ratio * Math.max(0, resolution / maxResolution - 1)) / ratio +\n    1;\n  if (minResolution) {\n    result = Math.max(result, minResolution);\n    result /=\n      Math.log(1 + ratio * Math.max(0, minResolution / resolution - 1)) /\n        ratio +\n      1;\n  }\n  return clamp(result, minResolution / 2, maxResolution * 2);\n}\n\n/**\n * @param {Array<number>} resolutions Resolutions.\n * @param {boolean} [smooth] If true, the view will be able to slightly exceed resolution limits. Default: true.\n * @param {import(\"./extent.js\").Extent} [maxExtent] Maximum allowed extent.\n * @param {boolean} [showFullExtent] If true, allows us to show the full extent. Default: false.\n * @return {Type} Zoom function.\n */\nexport function createSnapToResolutions(\n  resolutions,\n  smooth,\n  maxExtent,\n  showFullExtent\n) {\n  smooth = smooth !== undefined ? smooth : true;\n  return (\n    /**\n     * @param {number|undefined} resolution Resolution.\n     * @param {number} direction Direction.\n     * @param {import(\"./size.js\").Size} size Viewport size.\n     * @param {boolean} [isMoving] True if an interaction or animation is in progress.\n     * @return {number|undefined} Resolution.\n     */\n    function (resolution, direction, size, isMoving) {\n      if (resolution !== undefined) {\n        const maxResolution = resolutions[0];\n        const minResolution = resolutions[resolutions.length - 1];\n        const cappedMaxRes = maxExtent\n          ? getViewportClampedResolution(\n              maxResolution,\n              maxExtent,\n              size,\n              showFullExtent\n            )\n          : maxResolution;\n\n        // during interacting or animating, allow intermediary values\n        if (isMoving) {\n          if (!smooth) {\n            return clamp(resolution, minResolution, cappedMaxRes);\n          }\n          return getSmoothClampedResolution(\n            resolution,\n            cappedMaxRes,\n            minResolution\n          );\n        }\n\n        const capped = Math.min(cappedMaxRes, resolution);\n        const z = Math.floor(linearFindNearest(resolutions, capped, direction));\n        if (resolutions[z] > cappedMaxRes && z < resolutions.length - 1) {\n          return resolutions[z + 1];\n        }\n        return resolutions[z];\n      }\n      return undefined;\n    }\n  );\n}\n\n/**\n * @param {number} power Power.\n * @param {number} maxResolution Maximum resolution.\n * @param {number} [minResolution] Minimum resolution.\n * @param {boolean} [smooth] If true, the view will be able to slightly exceed resolution limits. Default: true.\n * @param {import(\"./extent.js\").Extent} [maxExtent] Maximum allowed extent.\n * @param {boolean} [showFullExtent] If true, allows us to show the full extent. Default: false.\n * @return {Type} Zoom function.\n */\nexport function createSnapToPower(\n  power,\n  maxResolution,\n  minResolution,\n  smooth,\n  maxExtent,\n  showFullExtent\n) {\n  smooth = smooth !== undefined ? smooth : true;\n  minResolution = minResolution !== undefined ? minResolution : 0;\n\n  return (\n    /**\n     * @param {number|undefined} resolution Resolution.\n     * @param {number} direction Direction.\n     * @param {import(\"./size.js\").Size} size Viewport size.\n     * @param {boolean} [isMoving] True if an interaction or animation is in progress.\n     * @return {number|undefined} Resolution.\n     */\n    function (resolution, direction, size, isMoving) {\n      if (resolution !== undefined) {\n        const cappedMaxRes = maxExtent\n          ? getViewportClampedResolution(\n              maxResolution,\n              maxExtent,\n              size,\n              showFullExtent\n            )\n          : maxResolution;\n\n        // during interacting or animating, allow intermediary values\n        if (isMoving) {\n          if (!smooth) {\n            return clamp(resolution, minResolution, cappedMaxRes);\n          }\n          return getSmoothClampedResolution(\n            resolution,\n            cappedMaxRes,\n            minResolution\n          );\n        }\n\n        const tolerance = 1e-9;\n        const minZoomLevel = Math.ceil(\n          Math.log(maxResolution / cappedMaxRes) / Math.log(power) - tolerance\n        );\n        const offset = -direction * (0.5 - tolerance) + 0.5;\n        const capped = Math.min(cappedMaxRes, resolution);\n        const cappedZoomLevel = Math.floor(\n          Math.log(maxResolution / capped) / Math.log(power) + offset\n        );\n        const zoomLevel = Math.max(minZoomLevel, cappedZoomLevel);\n        const newResolution = maxResolution / Math.pow(power, zoomLevel);\n        return clamp(newResolution, minResolution, cappedMaxRes);\n      }\n      return undefined;\n    }\n  );\n}\n\n/**\n * @param {number} maxResolution Max resolution.\n * @param {number} minResolution Min resolution.\n * @param {boolean} [smooth] If true, the view will be able to slightly exceed resolution limits. Default: true.\n * @param {import(\"./extent.js\").Extent} [maxExtent] Maximum allowed extent.\n * @param {boolean} [showFullExtent] If true, allows us to show the full extent. Default: false.\n * @return {Type} Zoom function.\n */\nexport function createMinMaxResolution(\n  maxResolution,\n  minResolution,\n  smooth,\n  maxExtent,\n  showFullExtent\n) {\n  smooth = smooth !== undefined ? smooth : true;\n\n  return (\n    /**\n     * @param {number|undefined} resolution Resolution.\n     * @param {number} direction Direction.\n     * @param {import(\"./size.js\").Size} size Viewport size.\n     * @param {boolean} [isMoving] True if an interaction or animation is in progress.\n     * @return {number|undefined} Resolution.\n     */\n    function (resolution, direction, size, isMoving) {\n      if (resolution !== undefined) {\n        const cappedMaxRes = maxExtent\n          ? getViewportClampedResolution(\n              maxResolution,\n              maxExtent,\n              size,\n              showFullExtent\n            )\n          : maxResolution;\n\n        if (!smooth || !isMoving) {\n          return clamp(resolution, minResolution, cappedMaxRes);\n        }\n        return getSmoothClampedResolution(\n          resolution,\n          cappedMaxRes,\n          minResolution\n        );\n      }\n      return undefined;\n    }\n  );\n}\n","/**\n * @module ol/rotationconstraint\n */\nimport {toRadians} from './math.js';\n\n/**\n * @typedef {function((number|undefined), boolean=): (number|undefined)} Type\n */\n\n/**\n * @param {number|undefined} rotation Rotation.\n * @return {number|undefined} Rotation.\n */\nexport function disable(rotation) {\n  if (rotation !== undefined) {\n    return 0;\n  }\n  return undefined;\n}\n\n/**\n * @param {number|undefined} rotation Rotation.\n * @return {number|undefined} Rotation.\n */\nexport function none(rotation) {\n  if (rotation !== undefined) {\n    return rotation;\n  }\n  return undefined;\n}\n\n/**\n * @param {number} n N.\n * @return {Type} Rotation constraint.\n */\nexport function createSnapToN(n) {\n  const theta = (2 * Math.PI) / n;\n  return (\n    /**\n     * @param {number|undefined} rotation Rotation.\n     * @param {boolean} [isMoving] True if an interaction or animation is in progress.\n     * @return {number|undefined} Rotation.\n     */\n    function (rotation, isMoving) {\n      if (isMoving) {\n        return rotation;\n      }\n\n      if (rotation !== undefined) {\n        rotation = Math.floor(rotation / theta + 0.5) * theta;\n        return rotation;\n      }\n      return undefined;\n    }\n  );\n}\n\n/**\n * @param {number} [tolerance] Tolerance.\n * @return {Type} Rotation constraint.\n */\nexport function createSnapToZero(tolerance) {\n  tolerance = tolerance || toRadians(5);\n  return (\n    /**\n     * @param {number|undefined} rotation Rotation.\n     * @param {boolean} [isMoving] True if an interaction or animation is in progress.\n     * @return {number|undefined} Rotation.\n     */\n    function (rotation, isMoving) {\n      if (isMoving) {\n        return rotation;\n      }\n\n      if (rotation !== undefined) {\n        if (Math.abs(rotation) <= tolerance) {\n          return 0;\n        }\n        return rotation;\n      }\n      return undefined;\n    }\n  );\n}\n","/**\n * @module ol/View\n */\nimport BaseObject from './Object.js';\nimport ViewHint from './ViewHint.js';\nimport ViewProperty from './ViewProperty.js';\nimport {DEFAULT_TILE_SIZE} from './tilegrid/common.js';\nimport {\n  METERS_PER_UNIT,\n  createProjection,\n  disableCoordinateWarning,\n  fromUserCoordinate,\n  fromUserExtent,\n  getUserProjection,\n  toUserCoordinate,\n  toUserExtent,\n} from './proj.js';\nimport {VOID} from './functions.js';\nimport {\n  add as addCoordinate,\n  equals as coordinatesEqual,\n  equals,\n  rotate as rotateCoordinate,\n} from './coordinate.js';\nimport {assert} from './asserts.js';\nimport {none as centerNone, createExtent} from './centerconstraint.js';\nimport {clamp, modulo} from './math.js';\nimport {\n  createMinMaxResolution,\n  createSnapToPower,\n  createSnapToResolutions,\n} from './resolutionconstraint.js';\nimport {\n  createSnapToN,\n  createSnapToZero,\n  disable,\n  none as rotationNone,\n} from './rotationconstraint.js';\nimport {easeOut, inAndOut} from './easing.js';\nimport {\n  getCenter,\n  getForViewAndSize,\n  getHeight,\n  getWidth,\n  isEmpty,\n} from './extent.js';\nimport {linearFindNearest} from './array.js';\nimport {fromExtent as polygonFromExtent} from './geom/Polygon.js';\n\n/**\n * An animation configuration\n *\n * @typedef {Object} Animation\n * @property {import(\"./coordinate.js\").Coordinate} [sourceCenter] Source center.\n * @property {import(\"./coordinate.js\").Coordinate} [targetCenter] Target center.\n * @property {number} [sourceResolution] Source resolution.\n * @property {number} [targetResolution] Target resolution.\n * @property {number} [sourceRotation] Source rotation.\n * @property {number} [targetRotation] Target rotation.\n * @property {import(\"./coordinate.js\").Coordinate} [anchor] Anchor.\n * @property {number} start Start.\n * @property {number} duration Duration.\n * @property {boolean} complete Complete.\n * @property {function(number):number} easing Easing.\n * @property {function(boolean):void} callback Callback.\n */\n\n/**\n * @typedef {Object} Constraints\n * @property {import(\"./centerconstraint.js\").Type} center Center.\n * @property {import(\"./resolutionconstraint.js\").Type} resolution Resolution.\n * @property {import(\"./rotationconstraint.js\").Type} rotation Rotation.\n */\n\n/**\n * @typedef {Object} FitOptions\n * @property {import(\"./size.js\").Size} [size] The size in pixels of the box to fit\n * the extent into. Default is the current size of the first map in the DOM that\n * uses this view, or `[100, 100]` if no such map is found.\n * @property {!Array<number>} [padding=[0, 0, 0, 0]] Padding (in pixels) to be\n * cleared inside the view. Values in the array are top, right, bottom and left\n * padding.\n * @property {boolean} [nearest=false] If the view `constrainResolution` option is `true`,\n * get the nearest extent instead of the closest that actually fits the view.\n * @property {number} [minResolution=0] Minimum resolution that we zoom to.\n * @property {number} [maxZoom] Maximum zoom level that we zoom to. If\n * `minResolution` is given, this property is ignored.\n * @property {number} [duration] The duration of the animation in milliseconds.\n * By default, there is no animation to the target extent.\n * @property {function(number):number} [easing] The easing function used during\n * the animation (defaults to {@link module:ol/easing.inAndOut}).\n * The function will be called for each frame with a number representing a\n * fraction of the animation's duration.  The function should return a number\n * between 0 and 1 representing the progress toward the destination state.\n * @property {function(boolean):void} [callback] Function called when the view is in\n * its final position. The callback will be called with `true` if the animation\n * series completed on its own or `false` if it was cancelled.\n */\n\n/**\n * @typedef {Object} ViewOptions\n * @property {import(\"./coordinate.js\").Coordinate} [center] The initial center for\n * the view. If a user projection is not set, the coordinate system for the center is\n * specified with the `projection` option. Layer sources will not be fetched if this\n * is not set, but the center can be set later with {@link #setCenter}.\n * @property {boolean|number} [constrainRotation=true] Rotation constraint.\n * `false` means no constraint. `true` means no constraint, but snap to zero\n * near zero. A number constrains the rotation to that number of values. For\n * example, `4` will constrain the rotation to 0, 90, 180, and 270 degrees.\n * @property {boolean} [enableRotation=true] Enable rotation.\n * If `false`, a rotation constraint that always sets the rotation to zero is\n * used. The `constrainRotation` option has no effect if `enableRotation` is\n * `false`.\n * @property {import(\"./extent.js\").Extent} [extent] The extent that constrains the\n * view, in other words, nothing outside of this extent can be visible on the map.\n * @property {boolean} [constrainOnlyCenter=false] If true, the extent\n * constraint will only apply to the view center and not the whole extent.\n * @property {boolean} [smoothExtentConstraint=true] If true, the extent\n * constraint will be applied smoothly, i.e. allow the view to go slightly outside\n * of the given `extent`.\n * @property {number} [maxResolution] The maximum resolution used to determine\n * the resolution constraint. It is used together with `minResolution` (or\n * `maxZoom`) and `zoomFactor`. If unspecified it is calculated in such a way\n * that the projection's validity extent fits in a 256x256 px tile. If the\n * projection is Spherical Mercator (the default) then `maxResolution` defaults\n * to `40075016.68557849 / 256 = 156543.03392804097`.\n * @property {number} [minResolution] The minimum resolution used to determine\n * the resolution constraint.  It is used together with `maxResolution` (or\n * `minZoom`) and `zoomFactor`.  If unspecified it is calculated assuming 29\n * zoom levels (with a factor of 2). If the projection is Spherical Mercator\n * (the default) then `minResolution` defaults to\n * `40075016.68557849 / 256 / Math.pow(2, 28) = 0.0005831682455839253`.\n * @property {number} [maxZoom=28] The maximum zoom level used to determine the\n * resolution constraint. It is used together with `minZoom` (or\n * `maxResolution`) and `zoomFactor`.  Note that if `minResolution` is also\n * provided, it is given precedence over `maxZoom`.\n * @property {number} [minZoom=0] The minimum zoom level used to determine the\n * resolution constraint. It is used together with `maxZoom` (or\n * `minResolution`) and `zoomFactor`.  Note that if `maxResolution` is also\n * provided, it is given precedence over `minZoom`.\n * @property {boolean} [multiWorld=false] If `false` the view is constrained so\n * only one world is visible, and you cannot pan off the edge.  If `true` the map\n * may show multiple worlds at low zoom levels.  Only used if the `projection` is\n * global.  Note that if `extent` is also provided it is given precedence.\n * @property {boolean} [constrainResolution=false] If true, the view will always\n * animate to the closest zoom level after an interaction; false means\n * intermediary zoom levels are allowed.\n * @property {boolean} [smoothResolutionConstraint=true] If true, the resolution\n * min/max values will be applied smoothly, i. e. allow the view to exceed slightly\n * the given resolution or zoom bounds.\n * @property {boolean} [showFullExtent=false] Allow the view to be zoomed out to\n * show the full configured extent. By default, when a view is configured with an\n * extent, users will not be able to zoom out so the viewport exceeds the extent in\n * either dimension. This means the full extent may not be visible if the viewport\n * is taller or wider than the aspect ratio of the configured extent. If\n * showFullExtent is true, the user will be able to zoom out so that the viewport\n * exceeds the height or width of the configured extent, but not both, allowing the\n * full extent to be shown.\n * @property {import(\"./proj.js\").ProjectionLike} [projection='EPSG:3857'] The\n * projection. The default is Spherical Mercator.\n * @property {number} [resolution] The initial resolution for the view. The\n * units are `projection` units per pixel (e.g. meters per pixel). An\n * alternative to setting this is to set `zoom`. Layer sources will not be\n * fetched if neither this nor `zoom` are defined, but they can be set later\n * with {@link #setZoom} or {@link #setResolution}.\n * @property {Array<number>} [resolutions] Resolutions that determine the\n * zoom levels if specified. The index in the array corresponds to the zoom level,\n * therefore the resolution values have to be in descending order. It also constrains\n * the resolution by the minimum and maximum value. If set the `maxResolution`,\n * `minResolution`, `minZoom`, `maxZoom`, and `zoomFactor` options are ignored.\n * @property {number} [rotation=0] The initial rotation for the view in radians\n * (positive rotation clockwise, 0 means North).\n * @property {number} [zoom] Only used if `resolution` is not defined. Zoom\n * level used to calculate the initial resolution for the view.\n * @property {number} [zoomFactor=2] The zoom factor used to compute the\n * corresponding resolution.\n * @property {!Array<number>} [padding=[0, 0, 0, 0]] Padding (in css pixels).\n * If the map viewport is partially covered with other content (overlays) along\n * its edges, this setting allows to shift the center of the viewport away from\n * that content. The order of the values is top, right, bottom, left.\n */\n\n/**\n * @typedef {Object} AnimationOptions\n * @property {import(\"./coordinate.js\").Coordinate} [center] The center of the view at the end of\n * the animation.\n * @property {number} [zoom] The zoom level of the view at the end of the\n * animation. This takes precedence over `resolution`.\n * @property {number} [resolution] The resolution of the view at the end\n * of the animation.  If `zoom` is also provided, this option will be ignored.\n * @property {number} [rotation] The rotation of the view at the end of\n * the animation.\n * @property {import(\"./coordinate.js\").Coordinate} [anchor] Optional anchor to remain fixed\n * during a rotation or resolution animation.\n * @property {number} [duration=1000] The duration of the animation in milliseconds.\n * @property {function(number):number} [easing] The easing function used\n * during the animation (defaults to {@link module:ol/easing.inAndOut}).\n * The function will be called for each frame with a number representing a\n * fraction of the animation's duration.  The function should return a number\n * between 0 and 1 representing the progress toward the destination state.\n */\n\n/**\n * @typedef {Object} State\n * @property {import(\"./coordinate.js\").Coordinate} center Center (in view projection coordinates).\n * @property {import(\"./proj/Projection.js\").default} projection Projection.\n * @property {number} resolution Resolution.\n * @property {import(\"./coordinate.js\").Coordinate} [nextCenter] The next center during an animation series.\n * @property {number} [nextResolution] The next resolution during an animation series.\n * @property {number} [nextRotation] The next rotation during an animation series.\n * @property {number} rotation Rotation.\n * @property {number} zoom Zoom.\n */\n\n/**\n * Like {@link import(\"./Map.js\").FrameState}, but just `viewState` and `extent`.\n * @typedef {Object} ViewStateLayerStateExtent\n * @property {State} viewState View state.\n * @property {import(\"./extent.js\").Extent} extent Extent (in user projection coordinates).\n * @property {Array<import(\"./layer/Layer.js\").State>} [layerStatesArray] Layer states.\n */\n\n/**\n * Default min zoom level for the map view.\n * @type {number}\n */\nconst DEFAULT_MIN_ZOOM = 0;\n\n/**\n * @typedef {import(\"./ObjectEventType\").Types|'change:center'|'change:resolution'|'change:rotation'} ViewObjectEventTypes\n */\n\n/***\n * @template Return\n * @typedef {import(\"./Observable\").OnSignature<import(\"./Observable\").EventTypes, import(\"./events/Event.js\").default, Return> &\n *   import(\"./Observable\").OnSignature<ViewObjectEventTypes, import(\"./Object\").ObjectEvent, Return> &\n *   import(\"./Observable\").CombinedOnSignature<import(\"./Observable\").EventTypes|ViewObjectEventTypes, Return>} ViewOnSignature\n */\n\n/**\n * @classdesc\n * A View object represents a simple 2D view of the map.\n *\n * This is the object to act upon to change the center, resolution,\n * and rotation of the map.\n *\n * A View has a `projection`. The projection determines the\n * coordinate system of the center, and its units determine the units of the\n * resolution (projection units per pixel). The default projection is\n * Web Mercator (EPSG:3857).\n *\n * ### The view states\n *\n * A View is determined by three states: `center`, `resolution`,\n * and `rotation`. Each state has a corresponding getter and setter, e.g.\n * `getCenter` and `setCenter` for the `center` state.\n *\n * The `zoom` state is actually not saved on the view: all computations\n * internally use the `resolution` state. Still, the `setZoom` and `getZoom`\n * methods are available, as well as `getResolutionForZoom` and\n * `getZoomForResolution` to switch from one system to the other.\n *\n * ### The constraints\n *\n * `setCenter`, `setResolution` and `setRotation` can be used to change the\n * states of the view, but any constraint defined in the constructor will\n * be applied along the way.\n *\n * A View object can have a *resolution constraint*, a *rotation constraint*\n * and a *center constraint*.\n *\n * The *resolution constraint* typically restricts min/max values and\n * snaps to specific resolutions. It is determined by the following\n * options: `resolutions`, `maxResolution`, `maxZoom` and `zoomFactor`.\n * If `resolutions` is set, the other three options are ignored. See\n * documentation for each option for more information. By default, the view\n * only has a min/max restriction and allow intermediary zoom levels when\n * pinch-zooming for example.\n *\n * The *rotation constraint* snaps to specific angles. It is determined\n * by the following options: `enableRotation` and `constrainRotation`.\n * By default rotation is allowed and its value is snapped to zero when approaching the\n * horizontal.\n *\n * The *center constraint* is determined by the `extent` option. By\n * default the view center is not constrained at all.\n *\n * ### Changing the view state\n *\n * It is important to note that `setZoom`, `setResolution`, `setCenter` and\n * `setRotation` are subject to the above mentioned constraints. As such, it\n * may sometimes not be possible to know in advance the resulting state of the\n * View. For example, calling `setResolution(10)` does not guarantee that\n * `getResolution()` will return `10`.\n *\n * A consequence of this is that, when applying a delta on the view state, one\n * should use `adjustCenter`, `adjustRotation`, `adjustZoom` and `adjustResolution`\n * rather than the corresponding setters. This will let view do its internal\n * computations. Besides, the `adjust*` methods also take an `anchor`\n * argument which allows specifying an origin for the transformation.\n *\n * ### Interacting with the view\n *\n * View constraints are usually only applied when the view is *at rest*, meaning that\n * no interaction or animation is ongoing. As such, if the user puts the view in a\n * state that is not equivalent to a constrained one (e.g. rotating the view when\n * the snap angle is 0), an animation will be triggered at the interaction end to\n * put back the view to a stable state;\n *\n * @api\n */\nclass View extends BaseObject {\n  /**\n   * @param {ViewOptions} [options] View options.\n   */\n  constructor(options) {\n    super();\n\n    /***\n     * @type {ViewOnSignature<import(\"./events\").EventsKey>}\n     */\n    this.on;\n\n    /***\n     * @type {ViewOnSignature<import(\"./events\").EventsKey>}\n     */\n    this.once;\n\n    /***\n     * @type {ViewOnSignature<void>}\n     */\n    this.un;\n\n    options = Object.assign({}, options);\n\n    /**\n     * @private\n     * @type {Array<number>}\n     */\n    this.hints_ = [0, 0];\n\n    /**\n     * @private\n     * @type {Array<Array<Animation>>}\n     */\n    this.animations_ = [];\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.updateAnimationKey_;\n\n    /**\n     * @private\n     * @const\n     * @type {import(\"./proj/Projection.js\").default}\n     */\n    this.projection_ = createProjection(options.projection, 'EPSG:3857');\n\n    /**\n     * @private\n     * @type {import(\"./size.js\").Size}\n     */\n    this.viewportSize_ = [100, 100];\n\n    /**\n     * @private\n     * @type {import(\"./coordinate.js\").Coordinate|undefined}\n     */\n    this.targetCenter_ = null;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.targetResolution_;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.targetRotation_;\n\n    /**\n     * @private\n     * @type {import(\"./coordinate.js\").Coordinate}\n     */\n    this.nextCenter_ = null;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.nextResolution_;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.nextRotation_;\n\n    /**\n     * @private\n     * @type {import(\"./coordinate.js\").Coordinate|undefined}\n     */\n    this.cancelAnchor_ = undefined;\n\n    if (options.projection) {\n      disableCoordinateWarning();\n    }\n    if (options.center) {\n      options.center = fromUserCoordinate(options.center, this.projection_);\n    }\n    if (options.extent) {\n      options.extent = fromUserExtent(options.extent, this.projection_);\n    }\n\n    this.applyOptions_(options);\n  }\n\n  /**\n   * Set up the view with the given options.\n   * @param {ViewOptions} options View options.\n   */\n  applyOptions_(options) {\n    const properties = Object.assign({}, options);\n    for (const key in ViewProperty) {\n      delete properties[key];\n    }\n    this.setProperties(properties, true);\n\n    const resolutionConstraintInfo = createResolutionConstraint(options);\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.maxResolution_ = resolutionConstraintInfo.maxResolution;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.minResolution_ = resolutionConstraintInfo.minResolution;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.zoomFactor_ = resolutionConstraintInfo.zoomFactor;\n\n    /**\n     * @private\n     * @type {Array<number>|undefined}\n     */\n    this.resolutions_ = options.resolutions;\n\n    /**\n     * @type {Array<number>|undefined}\n     * @private\n     */\n    this.padding_ = options.padding;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.minZoom_ = resolutionConstraintInfo.minZoom;\n\n    const centerConstraint = createCenterConstraint(options);\n    const resolutionConstraint = resolutionConstraintInfo.constraint;\n    const rotationConstraint = createRotationConstraint(options);\n\n    /**\n     * @private\n     * @type {Constraints}\n     */\n    this.constraints_ = {\n      center: centerConstraint,\n      resolution: resolutionConstraint,\n      rotation: rotationConstraint,\n    };\n\n    this.setRotation(options.rotation !== undefined ? options.rotation : 0);\n    this.setCenterInternal(\n      options.center !== undefined ? options.center : null\n    );\n    if (options.resolution !== undefined) {\n      this.setResolution(options.resolution);\n    } else if (options.zoom !== undefined) {\n      this.setZoom(options.zoom);\n    }\n  }\n\n  /**\n   * Padding (in css pixels).\n   * If the map viewport is partially covered with other content (overlays) along\n   * its edges, this setting allows to shift the center of the viewport away from that\n   * content. The order of the values in the array is top, right, bottom, left.\n   * The default is no padding, which is equivalent to `[0, 0, 0, 0]`.\n   * @type {Array<number>|undefined}\n   * @api\n   */\n  get padding() {\n    return this.padding_;\n  }\n  set padding(padding) {\n    let oldPadding = this.padding_;\n    this.padding_ = padding;\n    const center = this.getCenterInternal();\n    if (center) {\n      const newPadding = padding || [0, 0, 0, 0];\n      oldPadding = oldPadding || [0, 0, 0, 0];\n      const resolution = this.getResolution();\n      const offsetX =\n        (resolution / 2) *\n        (newPadding[3] - oldPadding[3] + oldPadding[1] - newPadding[1]);\n      const offsetY =\n        (resolution / 2) *\n        (newPadding[0] - oldPadding[0] + oldPadding[2] - newPadding[2]);\n      this.setCenterInternal([center[0] + offsetX, center[1] - offsetY]);\n    }\n  }\n\n  /**\n   * Get an updated version of the view options used to construct the view.  The\n   * current resolution (or zoom), center, and rotation are applied to any stored\n   * options.  The provided options can be used to apply new min/max zoom or\n   * resolution limits.\n   * @param {ViewOptions} newOptions New options to be applied.\n   * @return {ViewOptions} New options updated with the current view state.\n   */\n  getUpdatedOptions_(newOptions) {\n    const options = this.getProperties();\n\n    // preserve resolution (or zoom)\n    if (options.resolution !== undefined) {\n      options.resolution = this.getResolution();\n    } else {\n      options.zoom = this.getZoom();\n    }\n\n    // preserve center\n    options.center = this.getCenterInternal();\n\n    // preserve rotation\n    options.rotation = this.getRotation();\n\n    return Object.assign({}, options, newOptions);\n  }\n\n  /**\n   * Animate the view.  The view's center, zoom (or resolution), and rotation\n   * can be animated for smooth transitions between view states.  For example,\n   * to animate the view to a new zoom level:\n   *\n   *     view.animate({zoom: view.getZoom() + 1});\n   *\n   * By default, the animation lasts one second and uses in-and-out easing.  You\n   * can customize this behavior by including `duration` (in milliseconds) and\n   * `easing` options (see {@link module:ol/easing}).\n   *\n   * To chain together multiple animations, call the method with multiple\n   * animation objects.  For example, to first zoom and then pan:\n   *\n   *     view.animate({zoom: 10}, {center: [0, 0]});\n   *\n   * If you provide a function as the last argument to the animate method, it\n   * will get called at the end of an animation series.  The callback will be\n   * called with `true` if the animation series completed on its own or `false`\n   * if it was cancelled.\n   *\n   * Animations are cancelled by user interactions (e.g. dragging the map) or by\n   * calling `view.setCenter()`, `view.setResolution()`, or `view.setRotation()`\n   * (or another method that calls one of these).\n   *\n   * @param {...(AnimationOptions|function(boolean): void)} var_args Animation\n   *     options.  Multiple animations can be run in series by passing multiple\n   *     options objects.  To run multiple animations in parallel, call the method\n   *     multiple times.  An optional callback can be provided as a final\n   *     argument.  The callback will be called with a boolean indicating whether\n   *     the animation completed without being cancelled.\n   * @api\n   */\n  animate(var_args) {\n    if (this.isDef() && !this.getAnimating()) {\n      this.resolveConstraints(0);\n    }\n    const args = new Array(arguments.length);\n    for (let i = 0; i < args.length; ++i) {\n      let options = arguments[i];\n      if (options.center) {\n        options = Object.assign({}, options);\n        options.center = fromUserCoordinate(\n          options.center,\n          this.getProjection()\n        );\n      }\n      if (options.anchor) {\n        options = Object.assign({}, options);\n        options.anchor = fromUserCoordinate(\n          options.anchor,\n          this.getProjection()\n        );\n      }\n      args[i] = options;\n    }\n    this.animateInternal.apply(this, args);\n  }\n\n  /**\n   * @param {...(AnimationOptions|function(boolean): void)} var_args Animation options.\n   */\n  animateInternal(var_args) {\n    let animationCount = arguments.length;\n    let callback;\n    if (\n      animationCount > 1 &&\n      typeof arguments[animationCount - 1] === 'function'\n    ) {\n      callback = arguments[animationCount - 1];\n      --animationCount;\n    }\n\n    let i = 0;\n    for (; i < animationCount && !this.isDef(); ++i) {\n      // if view properties are not yet set, shortcut to the final state\n      const state = arguments[i];\n      if (state.center) {\n        this.setCenterInternal(state.center);\n      }\n      if (state.zoom !== undefined) {\n        this.setZoom(state.zoom);\n      } else if (state.resolution) {\n        this.setResolution(state.resolution);\n      }\n      if (state.rotation !== undefined) {\n        this.setRotation(state.rotation);\n      }\n    }\n    if (i === animationCount) {\n      if (callback) {\n        animationCallback(callback, true);\n      }\n      return;\n    }\n\n    let start = Date.now();\n    let center = this.targetCenter_.slice();\n    let resolution = this.targetResolution_;\n    let rotation = this.targetRotation_;\n    const series = [];\n    for (; i < animationCount; ++i) {\n      const options = /** @type {AnimationOptions} */ (arguments[i]);\n\n      const animation = {\n        start: start,\n        complete: false,\n        anchor: options.anchor,\n        duration: options.duration !== undefined ? options.duration : 1000,\n        easing: options.easing || inAndOut,\n        callback: callback,\n      };\n\n      if (options.center) {\n        animation.sourceCenter = center;\n        animation.targetCenter = options.center.slice();\n        center = animation.targetCenter;\n      }\n\n      if (options.zoom !== undefined) {\n        animation.sourceResolution = resolution;\n        animation.targetResolution = this.getResolutionForZoom(options.zoom);\n        resolution = animation.targetResolution;\n      } else if (options.resolution) {\n        animation.sourceResolution = resolution;\n        animation.targetResolution = options.resolution;\n        resolution = animation.targetResolution;\n      }\n\n      if (options.rotation !== undefined) {\n        animation.sourceRotation = rotation;\n        const delta =\n          modulo(options.rotation - rotation + Math.PI, 2 * Math.PI) - Math.PI;\n        animation.targetRotation = rotation + delta;\n        rotation = animation.targetRotation;\n      }\n\n      // check if animation is a no-op\n      if (isNoopAnimation(animation)) {\n        animation.complete = true;\n        // we still push it onto the series for callback handling\n      } else {\n        start += animation.duration;\n      }\n      series.push(animation);\n    }\n    this.animations_.push(series);\n    this.setHint(ViewHint.ANIMATING, 1);\n    this.updateAnimations_();\n  }\n\n  /**\n   * Determine if the view is being animated.\n   * @return {boolean} The view is being animated.\n   * @api\n   */\n  getAnimating() {\n    return this.hints_[ViewHint.ANIMATING] > 0;\n  }\n\n  /**\n   * Determine if the user is interacting with the view, such as panning or zooming.\n   * @return {boolean} The view is being interacted with.\n   * @api\n   */\n  getInteracting() {\n    return this.hints_[ViewHint.INTERACTING] > 0;\n  }\n\n  /**\n   * Cancel any ongoing animations.\n   * @api\n   */\n  cancelAnimations() {\n    this.setHint(ViewHint.ANIMATING, -this.hints_[ViewHint.ANIMATING]);\n    let anchor;\n    for (let i = 0, ii = this.animations_.length; i < ii; ++i) {\n      const series = this.animations_[i];\n      if (series[0].callback) {\n        animationCallback(series[0].callback, false);\n      }\n      if (!anchor) {\n        for (let j = 0, jj = series.length; j < jj; ++j) {\n          const animation = series[j];\n          if (!animation.complete) {\n            anchor = animation.anchor;\n            break;\n          }\n        }\n      }\n    }\n    this.animations_.length = 0;\n    this.cancelAnchor_ = anchor;\n    this.nextCenter_ = null;\n    this.nextResolution_ = NaN;\n    this.nextRotation_ = NaN;\n  }\n\n  /**\n   * Update all animations.\n   */\n  updateAnimations_() {\n    if (this.updateAnimationKey_ !== undefined) {\n      cancelAnimationFrame(this.updateAnimationKey_);\n      this.updateAnimationKey_ = undefined;\n    }\n    if (!this.getAnimating()) {\n      return;\n    }\n    const now = Date.now();\n    let more = false;\n    for (let i = this.animations_.length - 1; i >= 0; --i) {\n      const series = this.animations_[i];\n      let seriesComplete = true;\n      for (let j = 0, jj = series.length; j < jj; ++j) {\n        const animation = series[j];\n        if (animation.complete) {\n          continue;\n        }\n        const elapsed = now - animation.start;\n        let fraction =\n          animation.duration > 0 ? elapsed / animation.duration : 1;\n        if (fraction >= 1) {\n          animation.complete = true;\n          fraction = 1;\n        } else {\n          seriesComplete = false;\n        }\n        const progress = animation.easing(fraction);\n        if (animation.sourceCenter) {\n          const x0 = animation.sourceCenter[0];\n          const y0 = animation.sourceCenter[1];\n          const x1 = animation.targetCenter[0];\n          const y1 = animation.targetCenter[1];\n          this.nextCenter_ = animation.targetCenter;\n          const x = x0 + progress * (x1 - x0);\n          const y = y0 + progress * (y1 - y0);\n          this.targetCenter_ = [x, y];\n        }\n        if (animation.sourceResolution && animation.targetResolution) {\n          const resolution =\n            progress === 1\n              ? animation.targetResolution\n              : animation.sourceResolution +\n                progress *\n                  (animation.targetResolution - animation.sourceResolution);\n          if (animation.anchor) {\n            const size = this.getViewportSize_(this.getRotation());\n            const constrainedResolution = this.constraints_.resolution(\n              resolution,\n              0,\n              size,\n              true\n            );\n            this.targetCenter_ = this.calculateCenterZoom(\n              constrainedResolution,\n              animation.anchor\n            );\n          }\n          this.nextResolution_ = animation.targetResolution;\n          this.targetResolution_ = resolution;\n          this.applyTargetState_(true);\n        }\n        if (\n          animation.sourceRotation !== undefined &&\n          animation.targetRotation !== undefined\n        ) {\n          const rotation =\n            progress === 1\n              ? modulo(animation.targetRotation + Math.PI, 2 * Math.PI) -\n                Math.PI\n              : animation.sourceRotation +\n                progress *\n                  (animation.targetRotation - animation.sourceRotation);\n          if (animation.anchor) {\n            const constrainedRotation = this.constraints_.rotation(\n              rotation,\n              true\n            );\n            this.targetCenter_ = this.calculateCenterRotate(\n              constrainedRotation,\n              animation.anchor\n            );\n          }\n          this.nextRotation_ = animation.targetRotation;\n          this.targetRotation_ = rotation;\n        }\n        this.applyTargetState_(true);\n        more = true;\n        if (!animation.complete) {\n          break;\n        }\n      }\n      if (seriesComplete) {\n        this.animations_[i] = null;\n        this.setHint(ViewHint.ANIMATING, -1);\n        this.nextCenter_ = null;\n        this.nextResolution_ = NaN;\n        this.nextRotation_ = NaN;\n        const callback = series[0].callback;\n        if (callback) {\n          animationCallback(callback, true);\n        }\n      }\n    }\n    // prune completed series\n    this.animations_ = this.animations_.filter(Boolean);\n    if (more && this.updateAnimationKey_ === undefined) {\n      this.updateAnimationKey_ = requestAnimationFrame(\n        this.updateAnimations_.bind(this)\n      );\n    }\n  }\n\n  /**\n   * @param {number} rotation Target rotation.\n   * @param {import(\"./coordinate.js\").Coordinate} anchor Rotation anchor.\n   * @return {import(\"./coordinate.js\").Coordinate|undefined} Center for rotation and anchor.\n   */\n  calculateCenterRotate(rotation, anchor) {\n    let center;\n    const currentCenter = this.getCenterInternal();\n    if (currentCenter !== undefined) {\n      center = [currentCenter[0] - anchor[0], currentCenter[1] - anchor[1]];\n      rotateCoordinate(center, rotation - this.getRotation());\n      addCoordinate(center, anchor);\n    }\n    return center;\n  }\n\n  /**\n   * @param {number} resolution Target resolution.\n   * @param {import(\"./coordinate.js\").Coordinate} anchor Zoom anchor.\n   * @return {import(\"./coordinate.js\").Coordinate|undefined} Center for resolution and anchor.\n   */\n  calculateCenterZoom(resolution, anchor) {\n    let center;\n    const currentCenter = this.getCenterInternal();\n    const currentResolution = this.getResolution();\n    if (currentCenter !== undefined && currentResolution !== undefined) {\n      const x =\n        anchor[0] -\n        (resolution * (anchor[0] - currentCenter[0])) / currentResolution;\n      const y =\n        anchor[1] -\n        (resolution * (anchor[1] - currentCenter[1])) / currentResolution;\n      center = [x, y];\n    }\n    return center;\n  }\n\n  /**\n   * Returns the current viewport size.\n   * @private\n   * @param {number} [rotation] Take into account the rotation of the viewport when giving the size\n   * @return {import(\"./size.js\").Size} Viewport size or `[100, 100]` when no viewport is found.\n   */\n  getViewportSize_(rotation) {\n    const size = this.viewportSize_;\n    if (rotation) {\n      const w = size[0];\n      const h = size[1];\n      return [\n        Math.abs(w * Math.cos(rotation)) + Math.abs(h * Math.sin(rotation)),\n        Math.abs(w * Math.sin(rotation)) + Math.abs(h * Math.cos(rotation)),\n      ];\n    }\n    return size;\n  }\n\n  /**\n   * Stores the viewport size on the view. The viewport size is not read every time from the DOM\n   * to avoid performance hit and layout reflow.\n   * This should be done on map size change.\n   * Note: the constraints are not resolved during an animation to avoid stopping it\n   * @param {import(\"./size.js\").Size} [size] Viewport size; if undefined, [100, 100] is assumed\n   */\n  setViewportSize(size) {\n    this.viewportSize_ = Array.isArray(size) ? size.slice() : [100, 100];\n    if (!this.getAnimating()) {\n      this.resolveConstraints(0);\n    }\n  }\n\n  /**\n   * Get the view center.\n   * @return {import(\"./coordinate.js\").Coordinate|undefined} The center of the view.\n   * @observable\n   * @api\n   */\n  getCenter() {\n    const center = this.getCenterInternal();\n    if (!center) {\n      return center;\n    }\n    return toUserCoordinate(center, this.getProjection());\n  }\n\n  /**\n   * Get the view center without transforming to user projection.\n   * @return {import(\"./coordinate.js\").Coordinate|undefined} The center of the view.\n   */\n  getCenterInternal() {\n    return /** @type {import(\"./coordinate.js\").Coordinate|undefined} */ (\n      this.get(ViewProperty.CENTER)\n    );\n  }\n\n  /**\n   * @return {Constraints} Constraints.\n   */\n  getConstraints() {\n    return this.constraints_;\n  }\n\n  /**\n   * @return {boolean} Resolution constraint is set\n   */\n  getConstrainResolution() {\n    return this.get('constrainResolution');\n  }\n\n  /**\n   * @param {Array<number>} [hints] Destination array.\n   * @return {Array<number>} Hint.\n   */\n  getHints(hints) {\n    if (hints !== undefined) {\n      hints[0] = this.hints_[0];\n      hints[1] = this.hints_[1];\n      return hints;\n    }\n    return this.hints_.slice();\n  }\n\n  /**\n   * Calculate the extent for the current view state and the passed size.\n   * The size is the pixel dimensions of the box into which the calculated extent\n   * should fit. In most cases you want to get the extent of the entire map,\n   * that is `map.getSize()`.\n   * @param {import(\"./size.js\").Size} [size] Box pixel size. If not provided, the size\n   * of the map that uses this view will be used.\n   * @return {import(\"./extent.js\").Extent} Extent.\n   * @api\n   */\n  calculateExtent(size) {\n    const extent = this.calculateExtentInternal(size);\n    return toUserExtent(extent, this.getProjection());\n  }\n\n  /**\n   * @param {import(\"./size.js\").Size} [size] Box pixel size. If not provided,\n   * the map's last known viewport size will be used.\n   * @return {import(\"./extent.js\").Extent} Extent.\n   */\n  calculateExtentInternal(size) {\n    size = size || this.getViewportSizeMinusPadding_();\n    const center = /** @type {!import(\"./coordinate.js\").Coordinate} */ (\n      this.getCenterInternal()\n    );\n    assert(center, 1); // The view center is not defined\n    const resolution = /** @type {!number} */ (this.getResolution());\n    assert(resolution !== undefined, 2); // The view resolution is not defined\n    const rotation = /** @type {!number} */ (this.getRotation());\n    assert(rotation !== undefined, 3); // The view rotation is not defined\n\n    return getForViewAndSize(center, resolution, rotation, size);\n  }\n\n  /**\n   * Get the maximum resolution of the view.\n   * @return {number} The maximum resolution of the view.\n   * @api\n   */\n  getMaxResolution() {\n    return this.maxResolution_;\n  }\n\n  /**\n   * Get the minimum resolution of the view.\n   * @return {number} The minimum resolution of the view.\n   * @api\n   */\n  getMinResolution() {\n    return this.minResolution_;\n  }\n\n  /**\n   * Get the maximum zoom level for the view.\n   * @return {number} The maximum zoom level.\n   * @api\n   */\n  getMaxZoom() {\n    return /** @type {number} */ (\n      this.getZoomForResolution(this.minResolution_)\n    );\n  }\n\n  /**\n   * Set a new maximum zoom level for the view.\n   * @param {number} zoom The maximum zoom level.\n   * @api\n   */\n  setMaxZoom(zoom) {\n    this.applyOptions_(this.getUpdatedOptions_({maxZoom: zoom}));\n  }\n\n  /**\n   * Get the minimum zoom level for the view.\n   * @return {number} The minimum zoom level.\n   * @api\n   */\n  getMinZoom() {\n    return /** @type {number} */ (\n      this.getZoomForResolution(this.maxResolution_)\n    );\n  }\n\n  /**\n   * Set a new minimum zoom level for the view.\n   * @param {number} zoom The minimum zoom level.\n   * @api\n   */\n  setMinZoom(zoom) {\n    this.applyOptions_(this.getUpdatedOptions_({minZoom: zoom}));\n  }\n\n  /**\n   * Set whether the view should allow intermediary zoom levels.\n   * @param {boolean} enabled Whether the resolution is constrained.\n   * @api\n   */\n  setConstrainResolution(enabled) {\n    this.applyOptions_(this.getUpdatedOptions_({constrainResolution: enabled}));\n  }\n\n  /**\n   * Get the view projection.\n   * @return {import(\"./proj/Projection.js\").default} The projection of the view.\n   * @api\n   */\n  getProjection() {\n    return this.projection_;\n  }\n\n  /**\n   * Get the view resolution.\n   * @return {number|undefined} The resolution of the view.\n   * @observable\n   * @api\n   */\n  getResolution() {\n    return /** @type {number|undefined} */ (this.get(ViewProperty.RESOLUTION));\n  }\n\n  /**\n   * Get the resolutions for the view. This returns the array of resolutions\n   * passed to the constructor of the View, or undefined if none were given.\n   * @return {Array<number>|undefined} The resolutions of the view.\n   * @api\n   */\n  getResolutions() {\n    return this.resolutions_;\n  }\n\n  /**\n   * Get the resolution for a provided extent (in map units) and size (in pixels).\n   * @param {import(\"./extent.js\").Extent} extent Extent.\n   * @param {import(\"./size.js\").Size} [size] Box pixel size.\n   * @return {number} The resolution at which the provided extent will render at\n   *     the given size.\n   * @api\n   */\n  getResolutionForExtent(extent, size) {\n    return this.getResolutionForExtentInternal(\n      fromUserExtent(extent, this.getProjection()),\n      size\n    );\n  }\n\n  /**\n   * Get the resolution for a provided extent (in map units) and size (in pixels).\n   * @param {import(\"./extent.js\").Extent} extent Extent.\n   * @param {import(\"./size.js\").Size} [size] Box pixel size.\n   * @return {number} The resolution at which the provided extent will render at\n   *     the given size.\n   */\n  getResolutionForExtentInternal(extent, size) {\n    size = size || this.getViewportSizeMinusPadding_();\n    const xResolution = getWidth(extent) / size[0];\n    const yResolution = getHeight(extent) / size[1];\n    return Math.max(xResolution, yResolution);\n  }\n\n  /**\n   * Return a function that returns a value between 0 and 1 for a\n   * resolution. Exponential scaling is assumed.\n   * @param {number} [power] Power.\n   * @return {function(number): number} Resolution for value function.\n   */\n  getResolutionForValueFunction(power) {\n    power = power || 2;\n    const maxResolution = this.getConstrainedResolution(this.maxResolution_);\n    const minResolution = this.minResolution_;\n    const max = Math.log(maxResolution / minResolution) / Math.log(power);\n    return (\n      /**\n       * @param {number} value Value.\n       * @return {number} Resolution.\n       */\n      function (value) {\n        const resolution = maxResolution / Math.pow(power, value * max);\n        return resolution;\n      }\n    );\n  }\n\n  /**\n   * Get the view rotation.\n   * @return {number} The rotation of the view in radians.\n   * @observable\n   * @api\n   */\n  getRotation() {\n    return /** @type {number} */ (this.get(ViewProperty.ROTATION));\n  }\n\n  /**\n   * Return a function that returns a resolution for a value between\n   * 0 and 1. Exponential scaling is assumed.\n   * @param {number} [power] Power.\n   * @return {function(number): number} Value for resolution function.\n   */\n  getValueForResolutionFunction(power) {\n    const logPower = Math.log(power || 2);\n    const maxResolution = this.getConstrainedResolution(this.maxResolution_);\n    const minResolution = this.minResolution_;\n    const max = Math.log(maxResolution / minResolution) / logPower;\n    return (\n      /**\n       * @param {number} resolution Resolution.\n       * @return {number} Value.\n       */\n      function (resolution) {\n        const value = Math.log(maxResolution / resolution) / logPower / max;\n        return value;\n      }\n    );\n  }\n\n  /**\n   * Returns the size of the viewport minus padding.\n   * @private\n   * @param {number} [rotation] Take into account the rotation of the viewport when giving the size\n   * @return {import(\"./size.js\").Size} Viewport size reduced by the padding.\n   */\n  getViewportSizeMinusPadding_(rotation) {\n    let size = this.getViewportSize_(rotation);\n    const padding = this.padding_;\n    if (padding) {\n      size = [\n        size[0] - padding[1] - padding[3],\n        size[1] - padding[0] - padding[2],\n      ];\n    }\n    return size;\n  }\n\n  /**\n   * @return {State} View state.\n   */\n  getState() {\n    const projection = this.getProjection();\n    const resolution = this.getResolution();\n    const rotation = this.getRotation();\n    let center = /** @type {import(\"./coordinate.js\").Coordinate} */ (\n      this.getCenterInternal()\n    );\n    const padding = this.padding_;\n    if (padding) {\n      const reducedSize = this.getViewportSizeMinusPadding_();\n      center = calculateCenterOn(\n        center,\n        this.getViewportSize_(),\n        [reducedSize[0] / 2 + padding[3], reducedSize[1] / 2 + padding[0]],\n        resolution,\n        rotation\n      );\n    }\n    return {\n      center: center.slice(0),\n      projection: projection !== undefined ? projection : null,\n      resolution: resolution,\n      nextCenter: this.nextCenter_,\n      nextResolution: this.nextResolution_,\n      nextRotation: this.nextRotation_,\n      rotation: rotation,\n      zoom: this.getZoom(),\n    };\n  }\n\n  /**\n   * @return {ViewStateLayerStateExtent} Like `FrameState`, but just `viewState` and `extent`.\n   */\n  getViewStateAndExtent() {\n    return {\n      viewState: this.getState(),\n      extent: this.calculateExtent(),\n    };\n  }\n\n  /**\n   * Get the current zoom level. This method may return non-integer zoom levels\n   * if the view does not constrain the resolution, or if an interaction or\n   * animation is underway.\n   * @return {number|undefined} Zoom.\n   * @api\n   */\n  getZoom() {\n    let zoom;\n    const resolution = this.getResolution();\n    if (resolution !== undefined) {\n      zoom = this.getZoomForResolution(resolution);\n    }\n    return zoom;\n  }\n\n  /**\n   * Get the zoom level for a resolution.\n   * @param {number} resolution The resolution.\n   * @return {number|undefined} The zoom level for the provided resolution.\n   * @api\n   */\n  getZoomForResolution(resolution) {\n    let offset = this.minZoom_ || 0;\n    let max, zoomFactor;\n    if (this.resolutions_) {\n      const nearest = linearFindNearest(this.resolutions_, resolution, 1);\n      offset = nearest;\n      max = this.resolutions_[nearest];\n      if (nearest == this.resolutions_.length - 1) {\n        zoomFactor = 2;\n      } else {\n        zoomFactor = max / this.resolutions_[nearest + 1];\n      }\n    } else {\n      max = this.maxResolution_;\n      zoomFactor = this.zoomFactor_;\n    }\n    return offset + Math.log(max / resolution) / Math.log(zoomFactor);\n  }\n\n  /**\n   * Get the resolution for a zoom level.\n   * @param {number} zoom Zoom level.\n   * @return {number} The view resolution for the provided zoom level.\n   * @api\n   */\n  getResolutionForZoom(zoom) {\n    if (this.resolutions_) {\n      if (this.resolutions_.length <= 1) {\n        return 0;\n      }\n      const baseLevel = clamp(\n        Math.floor(zoom),\n        0,\n        this.resolutions_.length - 2\n      );\n      const zoomFactor =\n        this.resolutions_[baseLevel] / this.resolutions_[baseLevel + 1];\n      return (\n        this.resolutions_[baseLevel] /\n        Math.pow(zoomFactor, clamp(zoom - baseLevel, 0, 1))\n      );\n    }\n    return (\n      this.maxResolution_ / Math.pow(this.zoomFactor_, zoom - this.minZoom_)\n    );\n  }\n\n  /**\n   * Fit the given geometry or extent based on the given map size and border.\n   * The size is pixel dimensions of the box to fit the extent into.\n   * In most cases you will want to use the map size, that is `map.getSize()`.\n   * Takes care of the map angle.\n   * @param {import(\"./geom/SimpleGeometry.js\").default|import(\"./extent.js\").Extent} geometryOrExtent The geometry or\n   *     extent to fit the view to.\n   * @param {FitOptions} [options] Options.\n   * @api\n   */\n  fit(geometryOrExtent, options) {\n    /** @type {import(\"./geom/SimpleGeometry.js\").default} */\n    let geometry;\n    assert(\n      Array.isArray(geometryOrExtent) ||\n        typeof (/** @type {?} */ (geometryOrExtent).getSimplifiedGeometry) ===\n          'function',\n      24\n    ); // Invalid extent or geometry provided as `geometry`\n    if (Array.isArray(geometryOrExtent)) {\n      assert(!isEmpty(geometryOrExtent), 25); // Cannot fit empty extent provided as `geometry`\n      const extent = fromUserExtent(geometryOrExtent, this.getProjection());\n      geometry = polygonFromExtent(extent);\n    } else if (geometryOrExtent.getType() === 'Circle') {\n      const extent = fromUserExtent(\n        geometryOrExtent.getExtent(),\n        this.getProjection()\n      );\n      geometry = polygonFromExtent(extent);\n      geometry.rotate(this.getRotation(), getCenter(extent));\n    } else {\n      const userProjection = getUserProjection();\n      if (userProjection) {\n        geometry = /** @type {import(\"./geom/SimpleGeometry.js\").default} */ (\n          geometryOrExtent\n            .clone()\n            .transform(userProjection, this.getProjection())\n        );\n      } else {\n        geometry = geometryOrExtent;\n      }\n    }\n\n    this.fitInternal(geometry, options);\n  }\n\n  /**\n   * Calculate rotated extent\n   * @param {import(\"./geom/SimpleGeometry.js\").default} geometry The geometry.\n   * @return {import(\"./extent\").Extent} The rotated extent for the geometry.\n   */\n  rotatedExtentForGeometry(geometry) {\n    const rotation = this.getRotation();\n    const cosAngle = Math.cos(rotation);\n    const sinAngle = Math.sin(-rotation);\n    const coords = geometry.getFlatCoordinates();\n    const stride = geometry.getStride();\n    let minRotX = +Infinity;\n    let minRotY = +Infinity;\n    let maxRotX = -Infinity;\n    let maxRotY = -Infinity;\n    for (let i = 0, ii = coords.length; i < ii; i += stride) {\n      const rotX = coords[i] * cosAngle - coords[i + 1] * sinAngle;\n      const rotY = coords[i] * sinAngle + coords[i + 1] * cosAngle;\n      minRotX = Math.min(minRotX, rotX);\n      minRotY = Math.min(minRotY, rotY);\n      maxRotX = Math.max(maxRotX, rotX);\n      maxRotY = Math.max(maxRotY, rotY);\n    }\n    return [minRotX, minRotY, maxRotX, maxRotY];\n  }\n\n  /**\n   * @param {import(\"./geom/SimpleGeometry.js\").default} geometry The geometry.\n   * @param {FitOptions} [options] Options.\n   */\n  fitInternal(geometry, options) {\n    options = options || {};\n    let size = options.size;\n    if (!size) {\n      size = this.getViewportSizeMinusPadding_();\n    }\n    const padding =\n      options.padding !== undefined ? options.padding : [0, 0, 0, 0];\n    const nearest = options.nearest !== undefined ? options.nearest : false;\n    let minResolution;\n    if (options.minResolution !== undefined) {\n      minResolution = options.minResolution;\n    } else if (options.maxZoom !== undefined) {\n      minResolution = this.getResolutionForZoom(options.maxZoom);\n    } else {\n      minResolution = 0;\n    }\n\n    const rotatedExtent = this.rotatedExtentForGeometry(geometry);\n\n    // calculate resolution\n    let resolution = this.getResolutionForExtentInternal(rotatedExtent, [\n      size[0] - padding[1] - padding[3],\n      size[1] - padding[0] - padding[2],\n    ]);\n    resolution = isNaN(resolution)\n      ? minResolution\n      : Math.max(resolution, minResolution);\n    resolution = this.getConstrainedResolution(resolution, nearest ? 0 : 1);\n\n    // calculate center\n    const rotation = this.getRotation();\n    const sinAngle = Math.sin(rotation);\n    const cosAngle = Math.cos(rotation);\n    const centerRot = getCenter(rotatedExtent);\n    centerRot[0] += ((padding[1] - padding[3]) / 2) * resolution;\n    centerRot[1] += ((padding[0] - padding[2]) / 2) * resolution;\n    const centerX = centerRot[0] * cosAngle - centerRot[1] * sinAngle;\n    const centerY = centerRot[1] * cosAngle + centerRot[0] * sinAngle;\n    const center = this.getConstrainedCenter([centerX, centerY], resolution);\n    const callback = options.callback ? options.callback : VOID;\n\n    if (options.duration !== undefined) {\n      this.animateInternal(\n        {\n          resolution: resolution,\n          center: center,\n          duration: options.duration,\n          easing: options.easing,\n        },\n        callback\n      );\n    } else {\n      this.targetResolution_ = resolution;\n      this.targetCenter_ = center;\n      this.applyTargetState_(false, true);\n      animationCallback(callback, true);\n    }\n  }\n\n  /**\n   * Center on coordinate and view position.\n   * @param {import(\"./coordinate.js\").Coordinate} coordinate Coordinate.\n   * @param {import(\"./size.js\").Size} size Box pixel size.\n   * @param {import(\"./pixel.js\").Pixel} position Position on the view to center on.\n   * @api\n   */\n  centerOn(coordinate, size, position) {\n    this.centerOnInternal(\n      fromUserCoordinate(coordinate, this.getProjection()),\n      size,\n      position\n    );\n  }\n\n  /**\n   * @param {import(\"./coordinate.js\").Coordinate} coordinate Coordinate.\n   * @param {import(\"./size.js\").Size} size Box pixel size.\n   * @param {import(\"./pixel.js\").Pixel} position Position on the view to center on.\n   */\n  centerOnInternal(coordinate, size, position) {\n    this.setCenterInternal(\n      calculateCenterOn(\n        coordinate,\n        size,\n        position,\n        this.getResolution(),\n        this.getRotation()\n      )\n    );\n  }\n\n  /**\n   * Calculates the shift between map and viewport center.\n   * @param {import(\"./coordinate.js\").Coordinate} center Center.\n   * @param {number} resolution Resolution.\n   * @param {number} rotation Rotation.\n   * @param {import(\"./size.js\").Size} size Size.\n   * @return {Array<number>|undefined} Center shift.\n   */\n  calculateCenterShift(center, resolution, rotation, size) {\n    let centerShift;\n    const padding = this.padding_;\n    if (padding && center) {\n      const reducedSize = this.getViewportSizeMinusPadding_(-rotation);\n      const shiftedCenter = calculateCenterOn(\n        center,\n        size,\n        [reducedSize[0] / 2 + padding[3], reducedSize[1] / 2 + padding[0]],\n        resolution,\n        rotation\n      );\n      centerShift = [\n        center[0] - shiftedCenter[0],\n        center[1] - shiftedCenter[1],\n      ];\n    }\n    return centerShift;\n  }\n\n  /**\n   * @return {boolean} Is defined.\n   */\n  isDef() {\n    return !!this.getCenterInternal() && this.getResolution() !== undefined;\n  }\n\n  /**\n   * Adds relative coordinates to the center of the view. Any extent constraint will apply.\n   * @param {import(\"./coordinate.js\").Coordinate} deltaCoordinates Relative value to add.\n   * @api\n   */\n  adjustCenter(deltaCoordinates) {\n    const center = toUserCoordinate(this.targetCenter_, this.getProjection());\n    this.setCenter([\n      center[0] + deltaCoordinates[0],\n      center[1] + deltaCoordinates[1],\n    ]);\n  }\n\n  /**\n   * Adds relative coordinates to the center of the view. Any extent constraint will apply.\n   * @param {import(\"./coordinate.js\").Coordinate} deltaCoordinates Relative value to add.\n   */\n  adjustCenterInternal(deltaCoordinates) {\n    const center = this.targetCenter_;\n    this.setCenterInternal([\n      center[0] + deltaCoordinates[0],\n      center[1] + deltaCoordinates[1],\n    ]);\n  }\n\n  /**\n   * Multiply the view resolution by a ratio, optionally using an anchor. Any resolution\n   * constraint will apply.\n   * @param {number} ratio The ratio to apply on the view resolution.\n   * @param {import(\"./coordinate.js\").Coordinate} [anchor] The origin of the transformation.\n   * @api\n   */\n  adjustResolution(ratio, anchor) {\n    anchor = anchor && fromUserCoordinate(anchor, this.getProjection());\n    this.adjustResolutionInternal(ratio, anchor);\n  }\n\n  /**\n   * Multiply the view resolution by a ratio, optionally using an anchor. Any resolution\n   * constraint will apply.\n   * @param {number} ratio The ratio to apply on the view resolution.\n   * @param {import(\"./coordinate.js\").Coordinate} [anchor] The origin of the transformation.\n   */\n  adjustResolutionInternal(ratio, anchor) {\n    const isMoving = this.getAnimating() || this.getInteracting();\n    const size = this.getViewportSize_(this.getRotation());\n    const newResolution = this.constraints_.resolution(\n      this.targetResolution_ * ratio,\n      0,\n      size,\n      isMoving\n    );\n\n    if (anchor) {\n      this.targetCenter_ = this.calculateCenterZoom(newResolution, anchor);\n    }\n\n    this.targetResolution_ *= ratio;\n    this.applyTargetState_();\n  }\n\n  /**\n   * Adds a value to the view zoom level, optionally using an anchor. Any resolution\n   * constraint will apply.\n   * @param {number} delta Relative value to add to the zoom level.\n   * @param {import(\"./coordinate.js\").Coordinate} [anchor] The origin of the transformation.\n   * @api\n   */\n  adjustZoom(delta, anchor) {\n    this.adjustResolution(Math.pow(this.zoomFactor_, -delta), anchor);\n  }\n\n  /**\n   * Adds a value to the view rotation, optionally using an anchor. Any rotation\n   * constraint will apply.\n   * @param {number} delta Relative value to add to the zoom rotation, in radians.\n   * @param {import(\"./coordinate.js\").Coordinate} [anchor] The rotation center.\n   * @api\n   */\n  adjustRotation(delta, anchor) {\n    if (anchor) {\n      anchor = fromUserCoordinate(anchor, this.getProjection());\n    }\n    this.adjustRotationInternal(delta, anchor);\n  }\n\n  /**\n   * @param {number} delta Relative value to add to the zoom rotation, in radians.\n   * @param {import(\"./coordinate.js\").Coordinate} [anchor] The rotation center.\n   */\n  adjustRotationInternal(delta, anchor) {\n    const isMoving = this.getAnimating() || this.getInteracting();\n    const newRotation = this.constraints_.rotation(\n      this.targetRotation_ + delta,\n      isMoving\n    );\n    if (anchor) {\n      this.targetCenter_ = this.calculateCenterRotate(newRotation, anchor);\n    }\n    this.targetRotation_ += delta;\n    this.applyTargetState_();\n  }\n\n  /**\n   * Set the center of the current view. Any extent constraint will apply.\n   * @param {import(\"./coordinate.js\").Coordinate|undefined} center The center of the view.\n   * @observable\n   * @api\n   */\n  setCenter(center) {\n    this.setCenterInternal(\n      center ? fromUserCoordinate(center, this.getProjection()) : center\n    );\n  }\n\n  /**\n   * Set the center using the view projection (not the user projection).\n   * @param {import(\"./coordinate.js\").Coordinate|undefined} center The center of the view.\n   */\n  setCenterInternal(center) {\n    this.targetCenter_ = center;\n    this.applyTargetState_();\n  }\n\n  /**\n   * @param {import(\"./ViewHint.js\").default} hint Hint.\n   * @param {number} delta Delta.\n   * @return {number} New value.\n   */\n  setHint(hint, delta) {\n    this.hints_[hint] += delta;\n    this.changed();\n    return this.hints_[hint];\n  }\n\n  /**\n   * Set the resolution for this view. Any resolution constraint will apply.\n   * @param {number|undefined} resolution The resolution of the view.\n   * @observable\n   * @api\n   */\n  setResolution(resolution) {\n    this.targetResolution_ = resolution;\n    this.applyTargetState_();\n  }\n\n  /**\n   * Set the rotation for this view. Any rotation constraint will apply.\n   * @param {number} rotation The rotation of the view in radians.\n   * @observable\n   * @api\n   */\n  setRotation(rotation) {\n    this.targetRotation_ = rotation;\n    this.applyTargetState_();\n  }\n\n  /**\n   * Zoom to a specific zoom level. Any resolution constrain will apply.\n   * @param {number} zoom Zoom level.\n   * @api\n   */\n  setZoom(zoom) {\n    this.setResolution(this.getResolutionForZoom(zoom));\n  }\n\n  /**\n   * Recompute rotation/resolution/center based on target values.\n   * Note: we have to compute rotation first, then resolution and center considering that\n   * parameters can influence one another in case a view extent constraint is present.\n   * @param {boolean} [doNotCancelAnims] Do not cancel animations.\n   * @param {boolean} [forceMoving] Apply constraints as if the view is moving.\n   * @private\n   */\n  applyTargetState_(doNotCancelAnims, forceMoving) {\n    const isMoving =\n      this.getAnimating() || this.getInteracting() || forceMoving;\n\n    // compute rotation\n    const newRotation = this.constraints_.rotation(\n      this.targetRotation_,\n      isMoving\n    );\n    const size = this.getViewportSize_(newRotation);\n    const newResolution = this.constraints_.resolution(\n      this.targetResolution_,\n      0,\n      size,\n      isMoving\n    );\n    const newCenter = this.constraints_.center(\n      this.targetCenter_,\n      newResolution,\n      size,\n      isMoving,\n      this.calculateCenterShift(\n        this.targetCenter_,\n        newResolution,\n        newRotation,\n        size\n      )\n    );\n\n    if (this.get(ViewProperty.ROTATION) !== newRotation) {\n      this.set(ViewProperty.ROTATION, newRotation);\n    }\n    if (this.get(ViewProperty.RESOLUTION) !== newResolution) {\n      this.set(ViewProperty.RESOLUTION, newResolution);\n      this.set('zoom', this.getZoom(), true);\n    }\n    if (\n      !newCenter ||\n      !this.get(ViewProperty.CENTER) ||\n      !equals(this.get(ViewProperty.CENTER), newCenter)\n    ) {\n      this.set(ViewProperty.CENTER, newCenter);\n    }\n\n    if (this.getAnimating() && !doNotCancelAnims) {\n      this.cancelAnimations();\n    }\n    this.cancelAnchor_ = undefined;\n  }\n\n  /**\n   * If any constraints need to be applied, an animation will be triggered.\n   * This is typically done on interaction end.\n   * Note: calling this with a duration of 0 will apply the constrained values straight away,\n   * without animation.\n   * @param {number} [duration] The animation duration in ms.\n   * @param {number} [resolutionDirection] Which direction to zoom.\n   * @param {import(\"./coordinate.js\").Coordinate} [anchor] The origin of the transformation.\n   */\n  resolveConstraints(duration, resolutionDirection, anchor) {\n    duration = duration !== undefined ? duration : 200;\n    const direction = resolutionDirection || 0;\n\n    const newRotation = this.constraints_.rotation(this.targetRotation_);\n    const size = this.getViewportSize_(newRotation);\n    const newResolution = this.constraints_.resolution(\n      this.targetResolution_,\n      direction,\n      size\n    );\n    const newCenter = this.constraints_.center(\n      this.targetCenter_,\n      newResolution,\n      size,\n      false,\n      this.calculateCenterShift(\n        this.targetCenter_,\n        newResolution,\n        newRotation,\n        size\n      )\n    );\n\n    if (duration === 0 && !this.cancelAnchor_) {\n      this.targetResolution_ = newResolution;\n      this.targetRotation_ = newRotation;\n      this.targetCenter_ = newCenter;\n      this.applyTargetState_();\n      return;\n    }\n\n    anchor = anchor || (duration === 0 ? this.cancelAnchor_ : undefined);\n    this.cancelAnchor_ = undefined;\n\n    if (\n      this.getResolution() !== newResolution ||\n      this.getRotation() !== newRotation ||\n      !this.getCenterInternal() ||\n      !equals(this.getCenterInternal(), newCenter)\n    ) {\n      if (this.getAnimating()) {\n        this.cancelAnimations();\n      }\n\n      this.animateInternal({\n        rotation: newRotation,\n        center: newCenter,\n        resolution: newResolution,\n        duration: duration,\n        easing: easeOut,\n        anchor: anchor,\n      });\n    }\n  }\n\n  /**\n   * Notify the View that an interaction has started.\n   * The view state will be resolved to a stable one if needed\n   * (depending on its constraints).\n   * @api\n   */\n  beginInteraction() {\n    this.resolveConstraints(0);\n\n    this.setHint(ViewHint.INTERACTING, 1);\n  }\n\n  /**\n   * Notify the View that an interaction has ended. The view state will be resolved\n   * to a stable one if needed (depending on its constraints).\n   * @param {number} [duration] Animation duration in ms.\n   * @param {number} [resolutionDirection] Which direction to zoom.\n   * @param {import(\"./coordinate.js\").Coordinate} [anchor] The origin of the transformation.\n   * @api\n   */\n  endInteraction(duration, resolutionDirection, anchor) {\n    anchor = anchor && fromUserCoordinate(anchor, this.getProjection());\n    this.endInteractionInternal(duration, resolutionDirection, anchor);\n  }\n\n  /**\n   * Notify the View that an interaction has ended. The view state will be resolved\n   * to a stable one if needed (depending on its constraints).\n   * @param {number} [duration] Animation duration in ms.\n   * @param {number} [resolutionDirection] Which direction to zoom.\n   * @param {import(\"./coordinate.js\").Coordinate} [anchor] The origin of the transformation.\n   */\n  endInteractionInternal(duration, resolutionDirection, anchor) {\n    if (!this.getInteracting()) {\n      return;\n    }\n    this.setHint(ViewHint.INTERACTING, -1);\n    this.resolveConstraints(duration, resolutionDirection, anchor);\n  }\n\n  /**\n   * Get a valid position for the view center according to the current constraints.\n   * @param {import(\"./coordinate.js\").Coordinate|undefined} targetCenter Target center position.\n   * @param {number} [targetResolution] Target resolution. If not supplied, the current one will be used.\n   * This is useful to guess a valid center position at a different zoom level.\n   * @return {import(\"./coordinate.js\").Coordinate|undefined} Valid center position.\n   */\n  getConstrainedCenter(targetCenter, targetResolution) {\n    const size = this.getViewportSize_(this.getRotation());\n    return this.constraints_.center(\n      targetCenter,\n      targetResolution || this.getResolution(),\n      size\n    );\n  }\n\n  /**\n   * Get a valid zoom level according to the current view constraints.\n   * @param {number|undefined} targetZoom Target zoom.\n   * @param {number} [direction=0] Indicate which resolution should be used\n   * by a renderer if the view resolution does not match any resolution of the tile source.\n   * If 0, the nearest resolution will be used. If 1, the nearest lower resolution\n   * will be used. If -1, the nearest higher resolution will be used.\n   * @return {number|undefined} Valid zoom level.\n   */\n  getConstrainedZoom(targetZoom, direction) {\n    const targetRes = this.getResolutionForZoom(targetZoom);\n    return this.getZoomForResolution(\n      this.getConstrainedResolution(targetRes, direction)\n    );\n  }\n\n  /**\n   * Get a valid resolution according to the current view constraints.\n   * @param {number|undefined} targetResolution Target resolution.\n   * @param {number} [direction=0] Indicate which resolution should be used\n   * by a renderer if the view resolution does not match any resolution of the tile source.\n   * If 0, the nearest resolution will be used. If 1, the nearest lower resolution\n   * will be used. If -1, the nearest higher resolution will be used.\n   * @return {number|undefined} Valid resolution.\n   */\n  getConstrainedResolution(targetResolution, direction) {\n    direction = direction || 0;\n    const size = this.getViewportSize_(this.getRotation());\n\n    return this.constraints_.resolution(targetResolution, direction, size);\n  }\n}\n\n/**\n * @param {Function} callback Callback.\n * @param {*} returnValue Return value.\n */\nfunction animationCallback(callback, returnValue) {\n  setTimeout(function () {\n    callback(returnValue);\n  }, 0);\n}\n\n/**\n * @param {ViewOptions} options View options.\n * @return {import(\"./centerconstraint.js\").Type} The constraint.\n */\nexport function createCenterConstraint(options) {\n  if (options.extent !== undefined) {\n    const smooth =\n      options.smoothExtentConstraint !== undefined\n        ? options.smoothExtentConstraint\n        : true;\n    return createExtent(options.extent, options.constrainOnlyCenter, smooth);\n  }\n\n  const projection = createProjection(options.projection, 'EPSG:3857');\n  if (options.multiWorld !== true && projection.isGlobal()) {\n    const extent = projection.getExtent().slice();\n    extent[0] = -Infinity;\n    extent[2] = Infinity;\n    return createExtent(extent, false, false);\n  }\n\n  return centerNone;\n}\n\n/**\n * @param {ViewOptions} options View options.\n * @return {{constraint: import(\"./resolutionconstraint.js\").Type, maxResolution: number,\n *     minResolution: number, minZoom: number, zoomFactor: number}} The constraint.\n */\nexport function createResolutionConstraint(options) {\n  let resolutionConstraint;\n  let maxResolution;\n  let minResolution;\n\n  // TODO: move these to be ol constants\n  // see https://github.com/openlayers/openlayers/issues/2076\n  const defaultMaxZoom = 28;\n  const defaultZoomFactor = 2;\n\n  let minZoom =\n    options.minZoom !== undefined ? options.minZoom : DEFAULT_MIN_ZOOM;\n\n  let maxZoom =\n    options.maxZoom !== undefined ? options.maxZoom : defaultMaxZoom;\n\n  const zoomFactor =\n    options.zoomFactor !== undefined ? options.zoomFactor : defaultZoomFactor;\n\n  const multiWorld =\n    options.multiWorld !== undefined ? options.multiWorld : false;\n\n  const smooth =\n    options.smoothResolutionConstraint !== undefined\n      ? options.smoothResolutionConstraint\n      : true;\n\n  const showFullExtent =\n    options.showFullExtent !== undefined ? options.showFullExtent : false;\n\n  const projection = createProjection(options.projection, 'EPSG:3857');\n  const projExtent = projection.getExtent();\n  let constrainOnlyCenter = options.constrainOnlyCenter;\n  let extent = options.extent;\n  if (!multiWorld && !extent && projection.isGlobal()) {\n    constrainOnlyCenter = false;\n    extent = projExtent;\n  }\n\n  if (options.resolutions !== undefined) {\n    const resolutions = options.resolutions;\n    maxResolution = resolutions[minZoom];\n    minResolution =\n      resolutions[maxZoom] !== undefined\n        ? resolutions[maxZoom]\n        : resolutions[resolutions.length - 1];\n\n    if (options.constrainResolution) {\n      resolutionConstraint = createSnapToResolutions(\n        resolutions,\n        smooth,\n        !constrainOnlyCenter && extent,\n        showFullExtent\n      );\n    } else {\n      resolutionConstraint = createMinMaxResolution(\n        maxResolution,\n        minResolution,\n        smooth,\n        !constrainOnlyCenter && extent,\n        showFullExtent\n      );\n    }\n  } else {\n    // calculate the default min and max resolution\n    const size = !projExtent\n      ? // use an extent that can fit the whole world if need be\n        (360 * METERS_PER_UNIT.degrees) / projection.getMetersPerUnit()\n      : Math.max(getWidth(projExtent), getHeight(projExtent));\n\n    const defaultMaxResolution =\n      size / DEFAULT_TILE_SIZE / Math.pow(defaultZoomFactor, DEFAULT_MIN_ZOOM);\n\n    const defaultMinResolution =\n      defaultMaxResolution /\n      Math.pow(defaultZoomFactor, defaultMaxZoom - DEFAULT_MIN_ZOOM);\n\n    // user provided maxResolution takes precedence\n    maxResolution = options.maxResolution;\n    if (maxResolution !== undefined) {\n      minZoom = 0;\n    } else {\n      maxResolution = defaultMaxResolution / Math.pow(zoomFactor, minZoom);\n    }\n\n    // user provided minResolution takes precedence\n    minResolution = options.minResolution;\n    if (minResolution === undefined) {\n      if (options.maxZoom !== undefined) {\n        if (options.maxResolution !== undefined) {\n          minResolution = maxResolution / Math.pow(zoomFactor, maxZoom);\n        } else {\n          minResolution = defaultMaxResolution / Math.pow(zoomFactor, maxZoom);\n        }\n      } else {\n        minResolution = defaultMinResolution;\n      }\n    }\n\n    // given discrete zoom levels, minResolution may be different than provided\n    maxZoom =\n      minZoom +\n      Math.floor(\n        Math.log(maxResolution / minResolution) / Math.log(zoomFactor)\n      );\n    minResolution = maxResolution / Math.pow(zoomFactor, maxZoom - minZoom);\n\n    if (options.constrainResolution) {\n      resolutionConstraint = createSnapToPower(\n        zoomFactor,\n        maxResolution,\n        minResolution,\n        smooth,\n        !constrainOnlyCenter && extent,\n        showFullExtent\n      );\n    } else {\n      resolutionConstraint = createMinMaxResolution(\n        maxResolution,\n        minResolution,\n        smooth,\n        !constrainOnlyCenter && extent,\n        showFullExtent\n      );\n    }\n  }\n  return {\n    constraint: resolutionConstraint,\n    maxResolution: maxResolution,\n    minResolution: minResolution,\n    minZoom: minZoom,\n    zoomFactor: zoomFactor,\n  };\n}\n\n/**\n * @param {ViewOptions} options View options.\n * @return {import(\"./rotationconstraint.js\").Type} Rotation constraint.\n */\nexport function createRotationConstraint(options) {\n  const enableRotation =\n    options.enableRotation !== undefined ? options.enableRotation : true;\n  if (enableRotation) {\n    const constrainRotation = options.constrainRotation;\n    if (constrainRotation === undefined || constrainRotation === true) {\n      return createSnapToZero();\n    }\n    if (constrainRotation === false) {\n      return rotationNone;\n    }\n    if (typeof constrainRotation === 'number') {\n      return createSnapToN(constrainRotation);\n    }\n    return rotationNone;\n  }\n  return disable;\n}\n\n/**\n * Determine if an animation involves no view change.\n * @param {Animation} animation The animation.\n * @return {boolean} The animation involves no view change.\n */\nexport function isNoopAnimation(animation) {\n  if (animation.sourceCenter && animation.targetCenter) {\n    if (!coordinatesEqual(animation.sourceCenter, animation.targetCenter)) {\n      return false;\n    }\n  }\n  if (animation.sourceResolution !== animation.targetResolution) {\n    return false;\n  }\n  if (animation.sourceRotation !== animation.targetRotation) {\n    return false;\n  }\n  return true;\n}\n\n/**\n * @param {import(\"./coordinate.js\").Coordinate} coordinate Coordinate.\n * @param {import(\"./size.js\").Size} size Box pixel size.\n * @param {import(\"./pixel.js\").Pixel} position Position on the view to center on.\n * @param {number} resolution Resolution.\n * @param {number} rotation Rotation.\n * @return {import(\"./coordinate.js\").Coordinate} Shifted center.\n */\nfunction calculateCenterOn(coordinate, size, position, resolution, rotation) {\n  // calculate rotated position\n  const cosAngle = Math.cos(-rotation);\n  let sinAngle = Math.sin(-rotation);\n  let rotX = coordinate[0] * cosAngle - coordinate[1] * sinAngle;\n  let rotY = coordinate[1] * cosAngle + coordinate[0] * sinAngle;\n  rotX += (size[0] / 2 - position[0]) * resolution;\n  rotY += (position[1] - size[1] / 2) * resolution;\n\n  // go back to original angle\n  sinAngle = -sinAngle; // go back to original rotation\n  const centerX = rotX * cosAngle - rotY * sinAngle;\n  const centerY = rotY * cosAngle + rotX * sinAngle;\n\n  return [centerX, centerY];\n}\n\nexport default View;\n","/**\n * @module ol/layer/Layer\n */\nimport BaseLayer from './Base.js';\nimport EventType from '../events/EventType.js';\nimport LayerProperty from './Property.js';\nimport RenderEventType from '../render/EventType.js';\nimport View from '../View.js';\nimport {assert} from '../asserts.js';\nimport {intersects} from '../extent.js';\nimport {listen, unlistenByKey} from '../events.js';\n\n/**\n * @typedef {function(import(\"../Map.js\").FrameState):HTMLElement} RenderFunction\n */\n\n/**\n * @typedef {'sourceready'|'change:source'} LayerEventType\n */\n\n/***\n * @template Return\n * @typedef {import(\"../Observable\").OnSignature<import(\"../Observable\").EventTypes, import(\"../events/Event.js\").default, Return> &\n *   import(\"../Observable\").OnSignature<import(\"./Base\").BaseLayerObjectEventTypes|\n *     LayerEventType, import(\"../Object\").ObjectEvent, Return> &\n *   import(\"../Observable\").OnSignature<import(\"../render/EventType\").LayerRenderEventTypes, import(\"../render/Event\").default, Return> &\n *   import(\"../Observable\").CombinedOnSignature<import(\"../Observable\").EventTypes|import(\"./Base\").BaseLayerObjectEventTypes|LayerEventType|\n *     import(\"../render/EventType\").LayerRenderEventTypes, Return>} LayerOnSignature\n */\n\n/**\n * @template {import(\"../source/Source.js\").default} [SourceType=import(\"../source/Source.js\").default]\n * @typedef {Object} Options\n * @property {string} [className='ol-layer'] A CSS class name to set to the layer element.\n * @property {number} [opacity=1] Opacity (0, 1).\n * @property {boolean} [visible=true] Visibility.\n * @property {import(\"../extent.js\").Extent} [extent] The bounding extent for layer rendering.  The layer will not be\n * rendered outside of this extent.\n * @property {number} [zIndex] The z-index for layer rendering.  At rendering time, the layers\n * will be ordered, first by Z-index and then by position. When `undefined`, a `zIndex` of 0 is assumed\n * for layers that are added to the map's `layers` collection, or `Infinity` when the layer's `setMap()`\n * method was used.\n * @property {number} [minResolution] The minimum resolution (inclusive) at which this layer will be\n * visible.\n * @property {number} [maxResolution] The maximum resolution (exclusive) below which this layer will\n * be visible.\n * @property {number} [minZoom] The minimum view zoom level (exclusive) above which this layer will be\n * visible.\n * @property {number} [maxZoom] The maximum view zoom level (inclusive) at which this layer will\n * be visible.\n * @property {SourceType} [source] Source for this layer.  If not provided to the constructor,\n * the source can be set by calling {@link module:ol/layer/Layer~Layer#setSource layer.setSource(source)} after\n * construction.\n * @property {import(\"../Map.js\").default|null} [map] Map.\n * @property {RenderFunction} [render] Render function. Takes the frame state as input and is expected to return an\n * HTML element. Will overwrite the default rendering for the layer.\n * @property {Object<string, *>} [properties] Arbitrary observable properties. Can be accessed with `#get()` and `#set()`.\n */\n\n/**\n * @typedef {Object} State\n * @property {import(\"./Layer.js\").default} layer Layer.\n * @property {number} opacity Opacity, the value is rounded to two digits to appear after the decimal point.\n * @property {boolean} visible Visible.\n * @property {boolean} managed Managed.\n * @property {import(\"../extent.js\").Extent} [extent] Extent.\n * @property {number} zIndex ZIndex.\n * @property {number} maxResolution Maximum resolution.\n * @property {number} minResolution Minimum resolution.\n * @property {number} minZoom Minimum zoom.\n * @property {number} maxZoom Maximum zoom.\n */\n\n/**\n * @classdesc\n * Base class from which all layer types are derived. This should only be instantiated\n * in the case where a custom layer is added to the map with a custom `render` function.\n * Such a function can be specified in the `options` object, and is expected to return an HTML element.\n *\n * A visual representation of raster or vector map data.\n * Layers group together those properties that pertain to how the data is to be\n * displayed, irrespective of the source of that data.\n *\n * Layers are usually added to a map with [map.addLayer()]{@link import(\"../Map.js\").default#addLayer}.\n * Components like {@link module:ol/interaction/Draw~Draw} use unmanaged layers\n * internally. These unmanaged layers are associated with the map using\n * [layer.setMap()]{@link module:ol/layer/Layer~Layer#setMap} instead.\n *\n * A generic `change` event is fired when the state of the source changes.\n * A `sourceready` event is fired when the layer's source is ready.\n *\n * @fires import(\"../render/Event.js\").RenderEvent#prerender\n * @fires import(\"../render/Event.js\").RenderEvent#postrender\n * @fires import(\"../events/Event.js\").BaseEvent#sourceready\n *\n * @template {import(\"../source/Source.js\").default} [SourceType=import(\"../source/Source.js\").default]\n * @template {import(\"../renderer/Layer.js\").default} [RendererType=import(\"../renderer/Layer.js\").default]\n * @api\n */\nclass Layer extends BaseLayer {\n  /**\n   * @param {Options<SourceType>} options Layer options.\n   */\n  constructor(options) {\n    const baseOptions = Object.assign({}, options);\n    delete baseOptions.source;\n\n    super(baseOptions);\n\n    /***\n     * @type {LayerOnSignature<import(\"../events\").EventsKey>}\n     */\n    this.on;\n\n    /***\n     * @type {LayerOnSignature<import(\"../events\").EventsKey>}\n     */\n    this.once;\n\n    /***\n     * @type {LayerOnSignature<void>}\n     */\n    this.un;\n\n    /**\n     * @private\n     * @type {?import(\"../events.js\").EventsKey}\n     */\n    this.mapPrecomposeKey_ = null;\n\n    /**\n     * @private\n     * @type {?import(\"../events.js\").EventsKey}\n     */\n    this.mapRenderKey_ = null;\n\n    /**\n     * @private\n     * @type {?import(\"../events.js\").EventsKey}\n     */\n    this.sourceChangeKey_ = null;\n\n    /**\n     * @private\n     * @type {RendererType}\n     */\n    this.renderer_ = null;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.sourceReady_ = false;\n\n    /**\n     * @protected\n     * @type {boolean}\n     */\n    this.rendered = false;\n\n    // Overwrite default render method with a custom one\n    if (options.render) {\n      this.render = options.render;\n    }\n\n    if (options.map) {\n      this.setMap(options.map);\n    }\n\n    this.addChangeListener(\n      LayerProperty.SOURCE,\n      this.handleSourcePropertyChange_\n    );\n\n    const source = options.source\n      ? /** @type {SourceType} */ (options.source)\n      : null;\n    this.setSource(source);\n  }\n\n  /**\n   * @param {Array<import(\"./Layer.js\").default>} [array] Array of layers (to be modified in place).\n   * @return {Array<import(\"./Layer.js\").default>} Array of layers.\n   */\n  getLayersArray(array) {\n    array = array ? array : [];\n    array.push(this);\n    return array;\n  }\n\n  /**\n   * @param {Array<import(\"./Layer.js\").State>} [states] Optional list of layer states (to be modified in place).\n   * @return {Array<import(\"./Layer.js\").State>} List of layer states.\n   */\n  getLayerStatesArray(states) {\n    states = states ? states : [];\n    states.push(this.getLayerState());\n    return states;\n  }\n\n  /**\n   * Get the layer source.\n   * @return {SourceType|null} The layer source (or `null` if not yet set).\n   * @observable\n   * @api\n   */\n  getSource() {\n    return /** @type {SourceType} */ (this.get(LayerProperty.SOURCE)) || null;\n  }\n\n  /**\n   * @return {SourceType|null} The source being rendered.\n   */\n  getRenderSource() {\n    return this.getSource();\n  }\n\n  /**\n   * @return {import(\"../source/Source.js\").State} Source state.\n   */\n  getSourceState() {\n    const source = this.getSource();\n    return !source ? 'undefined' : source.getState();\n  }\n\n  /**\n   * @private\n   */\n  handleSourceChange_() {\n    this.changed();\n    if (this.sourceReady_ || this.getSource().getState() !== 'ready') {\n      return;\n    }\n    this.sourceReady_ = true;\n    this.dispatchEvent('sourceready');\n  }\n\n  /**\n   * @private\n   */\n  handleSourcePropertyChange_() {\n    if (this.sourceChangeKey_) {\n      unlistenByKey(this.sourceChangeKey_);\n      this.sourceChangeKey_ = null;\n    }\n    this.sourceReady_ = false;\n    const source = this.getSource();\n    if (source) {\n      this.sourceChangeKey_ = listen(\n        source,\n        EventType.CHANGE,\n        this.handleSourceChange_,\n        this\n      );\n      if (source.getState() === 'ready') {\n        this.sourceReady_ = true;\n        setTimeout(() => {\n          this.dispatchEvent('sourceready');\n        }, 0);\n      }\n    }\n    this.changed();\n  }\n\n  /**\n   * @param {import(\"../pixel\").Pixel} pixel Pixel.\n   * @return {Promise<Array<import(\"../Feature\").FeatureLike>>} Promise that resolves with\n   * an array of features.\n   */\n  getFeatures(pixel) {\n    if (!this.renderer_) {\n      return Promise.resolve([]);\n    }\n    return this.renderer_.getFeatures(pixel);\n  }\n\n  /**\n   * @param {import(\"../pixel\").Pixel} pixel Pixel.\n   * @return {Uint8ClampedArray|Uint8Array|Float32Array|DataView|null} Pixel data.\n   */\n  getData(pixel) {\n    if (!this.renderer_ || !this.rendered) {\n      return null;\n    }\n    return this.renderer_.getData(pixel);\n  }\n\n  /**\n   * The layer is visible on the map view, i.e. within its min/max resolution or zoom and\n   * extent, not set to `visible: false`, and not inside a layer group that is set\n   * to `visible: false`.\n   * @param {View|import(\"../View.js\").ViewStateLayerStateExtent} [view] View or {@link import(\"../Map.js\").FrameState}.\n   * Only required when the layer is not added to a map.\n   * @return {boolean} The layer is visible in the map view.\n   * @api\n   */\n  isVisible(view) {\n    let frameState;\n    const map = this.getMapInternal();\n    if (!view && map) {\n      view = map.getView();\n    }\n    if (view instanceof View) {\n      frameState = {\n        viewState: view.getState(),\n        extent: view.calculateExtent(),\n      };\n    } else {\n      frameState = view;\n    }\n    if (!frameState.layerStatesArray && map) {\n      frameState.layerStatesArray = map.getLayerGroup().getLayerStatesArray();\n    }\n    let layerState;\n    if (frameState.layerStatesArray) {\n      layerState = frameState.layerStatesArray.find(\n        (layerState) => layerState.layer === this\n      );\n    } else {\n      layerState = this.getLayerState();\n    }\n\n    const layerExtent = this.getExtent();\n\n    return (\n      inView(layerState, frameState.viewState) &&\n      (!layerExtent || intersects(layerExtent, frameState.extent))\n    );\n  }\n\n  /**\n   * Get the attributions of the source of this layer for the given view.\n   * @param {View|import(\"../View.js\").ViewStateLayerStateExtent} [view] View or {@link import(\"../Map.js\").FrameState}.\n   * Only required when the layer is not added to a map.\n   * @return {Array<string>} Attributions for this layer at the given view.\n   * @api\n   */\n  getAttributions(view) {\n    if (!this.isVisible(view)) {\n      return [];\n    }\n    let getAttributions;\n    const source = this.getSource();\n    if (source) {\n      getAttributions = source.getAttributions();\n    }\n    if (!getAttributions) {\n      return [];\n    }\n    const frameState =\n      view instanceof View ? view.getViewStateAndExtent() : view;\n    let attributions = getAttributions(frameState);\n    if (!Array.isArray(attributions)) {\n      attributions = [attributions];\n    }\n    return attributions;\n  }\n\n  /**\n   * In charge to manage the rendering of the layer. One layer type is\n   * bounded with one layer renderer.\n   * @param {?import(\"../Map.js\").FrameState} frameState Frame state.\n   * @param {HTMLElement} target Target which the renderer may (but need not) use\n   * for rendering its content.\n   * @return {HTMLElement|null} The rendered element.\n   */\n  render(frameState, target) {\n    const layerRenderer = this.getRenderer();\n\n    if (layerRenderer.prepareFrame(frameState)) {\n      this.rendered = true;\n      return layerRenderer.renderFrame(frameState, target);\n    }\n    return null;\n  }\n\n  /**\n   * Called when a layer is not visible during a map render.\n   */\n  unrender() {\n    this.rendered = false;\n  }\n\n  /**\n   * For use inside the library only.\n   * @param {import(\"../Map.js\").default|null} map Map.\n   */\n  setMapInternal(map) {\n    if (!map) {\n      this.unrender();\n    }\n    this.set(LayerProperty.MAP, map);\n  }\n\n  /**\n   * For use inside the library only.\n   * @return {import(\"../Map.js\").default|null} Map.\n   */\n  getMapInternal() {\n    return this.get(LayerProperty.MAP);\n  }\n\n  /**\n   * Sets the layer to be rendered on top of other layers on a map. The map will\n   * not manage this layer in its layers collection. This\n   * is useful for temporary layers. To remove an unmanaged layer from the map,\n   * use `#setMap(null)`.\n   *\n   * To add the layer to a map and have it managed by the map, use\n   * {@link module:ol/Map~Map#addLayer} instead.\n   * @param {import(\"../Map.js\").default|null} map Map.\n   * @api\n   */\n  setMap(map) {\n    if (this.mapPrecomposeKey_) {\n      unlistenByKey(this.mapPrecomposeKey_);\n      this.mapPrecomposeKey_ = null;\n    }\n    if (!map) {\n      this.changed();\n    }\n    if (this.mapRenderKey_) {\n      unlistenByKey(this.mapRenderKey_);\n      this.mapRenderKey_ = null;\n    }\n    if (map) {\n      this.mapPrecomposeKey_ = listen(\n        map,\n        RenderEventType.PRECOMPOSE,\n        function (evt) {\n          const renderEvent =\n            /** @type {import(\"../render/Event.js\").default} */ (evt);\n          const layerStatesArray = renderEvent.frameState.layerStatesArray;\n          const layerState = this.getLayerState(false);\n          // A layer can only be added to the map once. Use either `layer.setMap()` or `map.addLayer()`, not both.\n          assert(\n            !layerStatesArray.some(function (arrayLayerState) {\n              return arrayLayerState.layer === layerState.layer;\n            }),\n            67\n          );\n          layerStatesArray.push(layerState);\n        },\n        this\n      );\n      this.mapRenderKey_ = listen(this, EventType.CHANGE, map.render, map);\n      this.changed();\n    }\n  }\n\n  /**\n   * Set the layer source.\n   * @param {SourceType|null} source The layer source.\n   * @observable\n   * @api\n   */\n  setSource(source) {\n    this.set(LayerProperty.SOURCE, source);\n  }\n\n  /**\n   * Get the renderer for this layer.\n   * @return {RendererType|null} The layer renderer.\n   */\n  getRenderer() {\n    if (!this.renderer_) {\n      this.renderer_ = this.createRenderer();\n    }\n    return this.renderer_;\n  }\n\n  /**\n   * @return {boolean} The layer has a renderer.\n   */\n  hasRenderer() {\n    return !!this.renderer_;\n  }\n\n  /**\n   * Create a renderer for this layer.\n   * @return {RendererType} A layer renderer.\n   * @protected\n   */\n  createRenderer() {\n    return null;\n  }\n\n  /**\n   * Clean up.\n   */\n  disposeInternal() {\n    if (this.renderer_) {\n      this.renderer_.dispose();\n      delete this.renderer_;\n    }\n\n    this.setSource(null);\n    super.disposeInternal();\n  }\n}\n\n/**\n * Return `true` if the layer is visible and if the provided view state\n * has resolution and zoom levels that are in range of the layer's min/max.\n * @param {State} layerState Layer state.\n * @param {import(\"../View.js\").State} viewState View state.\n * @return {boolean} The layer is visible at the given view state.\n */\nexport function inView(layerState, viewState) {\n  if (!layerState.visible) {\n    return false;\n  }\n  const resolution = viewState.resolution;\n  if (\n    resolution < layerState.minResolution ||\n    resolution >= layerState.maxResolution\n  ) {\n    return false;\n  }\n  const zoom = viewState.zoom;\n  return zoom > layerState.minZoom && zoom <= layerState.maxZoom;\n}\n\nexport default Layer;\n","/**\n * @module ol/renderer/Map\n */\nimport Disposable from '../Disposable.js';\nimport {TRUE} from '../functions.js';\nimport {abstract} from '../util.js';\nimport {compose as composeTransform, makeInverse} from '../transform.js';\nimport {getWidth} from '../extent.js';\nimport {shared as iconImageCache} from '../style/IconImageCache.js';\nimport {inView} from '../layer/Layer.js';\nimport {wrapX} from '../coordinate.js';\n\n/**\n * @template T\n * @typedef HitMatch\n * @property {import(\"../Feature.js\").FeatureLike} feature Feature.\n * @property {import(\"../layer/Layer.js\").default} layer Layer.\n * @property {import(\"../geom/SimpleGeometry.js\").default} geometry Geometry.\n * @property {number} distanceSq Squared distance.\n * @property {import(\"./vector.js\").FeatureCallback<T>} callback Callback.\n */\n\n/**\n * @abstract\n */\nclass MapRenderer extends Disposable {\n  /**\n   * @param {import(\"../Map.js\").default} map Map.\n   */\n  constructor(map) {\n    super();\n\n    /**\n     * @private\n     * @type {import(\"../Map.js\").default}\n     */\n    this.map_ = map;\n  }\n\n  /**\n   * @abstract\n   * @param {import(\"../render/EventType.js\").default} type Event type.\n   * @param {import(\"../Map.js\").FrameState} frameState Frame state.\n   */\n  dispatchRenderEvent(type, frameState) {\n    abstract();\n  }\n\n  /**\n   * @param {import(\"../Map.js\").FrameState} frameState FrameState.\n   * @protected\n   */\n  calculateMatrices2D(frameState) {\n    const viewState = frameState.viewState;\n    const coordinateToPixelTransform = frameState.coordinateToPixelTransform;\n    const pixelToCoordinateTransform = frameState.pixelToCoordinateTransform;\n\n    composeTransform(\n      coordinateToPixelTransform,\n      frameState.size[0] / 2,\n      frameState.size[1] / 2,\n      1 / viewState.resolution,\n      -1 / viewState.resolution,\n      -viewState.rotation,\n      -viewState.center[0],\n      -viewState.center[1]\n    );\n\n    makeInverse(pixelToCoordinateTransform, coordinateToPixelTransform);\n  }\n\n  /**\n   * @param {import(\"../coordinate.js\").Coordinate} coordinate Coordinate.\n   * @param {import(\"../Map.js\").FrameState} frameState FrameState.\n   * @param {number} hitTolerance Hit tolerance in pixels.\n   * @param {boolean} checkWrapped Check for wrapped geometries.\n   * @param {import(\"./vector.js\").FeatureCallback<T>} callback Feature callback.\n   * @param {S} thisArg Value to use as `this` when executing `callback`.\n   * @param {function(this: U, import(\"../layer/Layer.js\").default): boolean} layerFilter Layer filter\n   *     function, only layers which are visible and for which this function\n   *     returns `true` will be tested for features.  By default, all visible\n   *     layers will be tested.\n   * @param {U} thisArg2 Value to use as `this` when executing `layerFilter`.\n   * @return {T|undefined} Callback result.\n   * @template S,T,U\n   */\n  forEachFeatureAtCoordinate(\n    coordinate,\n    frameState,\n    hitTolerance,\n    checkWrapped,\n    callback,\n    thisArg,\n    layerFilter,\n    thisArg2\n  ) {\n    let result;\n    const viewState = frameState.viewState;\n\n    /**\n     * @param {boolean} managed Managed layer.\n     * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n     * @param {import(\"../layer/Layer.js\").default} layer Layer.\n     * @param {import(\"../geom/Geometry.js\").default} geometry Geometry.\n     * @return {T|undefined} Callback result.\n     */\n    function forEachFeatureAtCoordinate(managed, feature, layer, geometry) {\n      return callback.call(thisArg, feature, managed ? layer : null, geometry);\n    }\n\n    const projection = viewState.projection;\n\n    const translatedCoordinate = wrapX(coordinate.slice(), projection);\n    const offsets = [[0, 0]];\n    if (projection.canWrapX() && checkWrapped) {\n      const projectionExtent = projection.getExtent();\n      const worldWidth = getWidth(projectionExtent);\n      offsets.push([-worldWidth, 0], [worldWidth, 0]);\n    }\n\n    const layerStates = frameState.layerStatesArray;\n    const numLayers = layerStates.length;\n\n    const matches = /** @type {Array<HitMatch<T>>} */ ([]);\n    const tmpCoord = [];\n    for (let i = 0; i < offsets.length; i++) {\n      for (let j = numLayers - 1; j >= 0; --j) {\n        const layerState = layerStates[j];\n        const layer = layerState.layer;\n        if (\n          layer.hasRenderer() &&\n          inView(layerState, viewState) &&\n          layerFilter.call(thisArg2, layer)\n        ) {\n          const layerRenderer = layer.getRenderer();\n          const source = layer.getSource();\n          if (layerRenderer && source) {\n            const coordinates = source.getWrapX()\n              ? translatedCoordinate\n              : coordinate;\n            const callback = forEachFeatureAtCoordinate.bind(\n              null,\n              layerState.managed\n            );\n            tmpCoord[0] = coordinates[0] + offsets[i][0];\n            tmpCoord[1] = coordinates[1] + offsets[i][1];\n            result = layerRenderer.forEachFeatureAtCoordinate(\n              tmpCoord,\n              frameState,\n              hitTolerance,\n              callback,\n              matches\n            );\n          }\n          if (result) {\n            return result;\n          }\n        }\n      }\n    }\n    if (matches.length === 0) {\n      return undefined;\n    }\n    const order = 1 / matches.length;\n    matches.forEach((m, i) => (m.distanceSq += i * order));\n    matches.sort((a, b) => a.distanceSq - b.distanceSq);\n    matches.some((m) => {\n      return (result = m.callback(m.feature, m.layer, m.geometry));\n    });\n    return result;\n  }\n\n  /**\n   * @param {import(\"../coordinate.js\").Coordinate} coordinate Coordinate.\n   * @param {import(\"../Map.js\").FrameState} frameState FrameState.\n   * @param {number} hitTolerance Hit tolerance in pixels.\n   * @param {boolean} checkWrapped Check for wrapped geometries.\n   * @param {function(this: U, import(\"../layer/Layer.js\").default): boolean} layerFilter Layer filter\n   *     function, only layers which are visible and for which this function\n   *     returns `true` will be tested for features.  By default, all visible\n   *     layers will be tested.\n   * @param {U} thisArg Value to use as `this` when executing `layerFilter`.\n   * @return {boolean} Is there a feature at the given coordinate?\n   * @template U\n   */\n  hasFeatureAtCoordinate(\n    coordinate,\n    frameState,\n    hitTolerance,\n    checkWrapped,\n    layerFilter,\n    thisArg\n  ) {\n    const hasFeature = this.forEachFeatureAtCoordinate(\n      coordinate,\n      frameState,\n      hitTolerance,\n      checkWrapped,\n      TRUE,\n      this,\n      layerFilter,\n      thisArg\n    );\n\n    return hasFeature !== undefined;\n  }\n\n  /**\n   * @return {import(\"../Map.js\").default} Map.\n   */\n  getMap() {\n    return this.map_;\n  }\n\n  /**\n   * Render.\n   * @abstract\n   * @param {?import(\"../Map.js\").FrameState} frameState Frame state.\n   */\n  renderFrame(frameState) {\n    abstract();\n  }\n\n  /**\n   * @param {import(\"../Map.js\").FrameState} frameState Frame state.\n   * @protected\n   */\n  scheduleExpireIconCache(frameState) {\n    if (iconImageCache.canExpireCache()) {\n      frameState.postRenderFunctions.push(expireIconCache);\n    }\n  }\n}\n\n/**\n * @param {import(\"../Map.js\").default} map Map.\n * @param {import(\"../Map.js\").FrameState} frameState Frame state.\n */\nfunction expireIconCache(map, frameState) {\n  iconImageCache.expire();\n}\n\nexport default MapRenderer;\n","/**\n * @module ol/render/Event\n */\n\nimport Event from '../events/Event.js';\n\nclass RenderEvent extends Event {\n  /**\n   * @param {import(\"./EventType.js\").default} type Type.\n   * @param {import(\"../transform.js\").Transform} [inversePixelTransform] Transform for\n   *     CSS pixels to rendered pixels.\n   * @param {import(\"../Map.js\").FrameState} [frameState] Frame state.\n   * @param {?(CanvasRenderingContext2D|WebGLRenderingContext)} [context] Context.\n   */\n  constructor(type, inversePixelTransform, frameState, context) {\n    super(type);\n\n    /**\n     * Transform from CSS pixels (relative to the top-left corner of the map viewport)\n     * to rendered pixels on this event's `context`. Only available when a Canvas renderer is used, null otherwise.\n     * @type {import(\"../transform.js\").Transform|undefined}\n     * @api\n     */\n    this.inversePixelTransform = inversePixelTransform;\n\n    /**\n     * An object representing the current render frame state.\n     * @type {import(\"../Map.js\").FrameState|undefined}\n     * @api\n     */\n    this.frameState = frameState;\n\n    /**\n     * Canvas context. Not available when the event is dispatched by the map. For Canvas 2D layers,\n     * the context will be the 2D rendering context.  For WebGL layers, the context will be the WebGL\n     * context.\n     * @type {CanvasRenderingContext2D|WebGLRenderingContext|undefined}\n     * @api\n     */\n    this.context = context;\n  }\n}\n\nexport default RenderEvent;\n","/**\n * @module ol/css\n */\n\n/**\n * @typedef {Object} FontParameters\n * @property {string} style Style.\n * @property {string} variant Variant.\n * @property {string} weight Weight.\n * @property {string} size Size.\n * @property {string} lineHeight LineHeight.\n * @property {string} family Family.\n * @property {Array<string>} families Families.\n */\n\n/**\n * The CSS class for hidden feature.\n *\n * @const\n * @type {string}\n */\nexport const CLASS_HIDDEN = 'ol-hidden';\n\n/**\n * The CSS class that we'll give the DOM elements to have them selectable.\n *\n * @const\n * @type {string}\n */\nexport const CLASS_SELECTABLE = 'ol-selectable';\n\n/**\n * The CSS class that we'll give the DOM elements to have them unselectable.\n *\n * @const\n * @type {string}\n */\nexport const CLASS_UNSELECTABLE = 'ol-unselectable';\n\n/**\n * The CSS class for unsupported feature.\n *\n * @const\n * @type {string}\n */\nexport const CLASS_UNSUPPORTED = 'ol-unsupported';\n\n/**\n * The CSS class for controls.\n *\n * @const\n * @type {string}\n */\nexport const CLASS_CONTROL = 'ol-control';\n\n/**\n * The CSS class that we'll give the DOM elements that are collapsed, i.e.\n * to those elements which usually can be expanded.\n *\n * @const\n * @type {string}\n */\nexport const CLASS_COLLAPSED = 'ol-collapsed';\n\n/**\n * From https://stackoverflow.com/questions/10135697/regex-to-parse-any-css-font\n * @type {RegExp}\n */\nconst fontRegEx = new RegExp(\n  [\n    '^\\\\s*(?=(?:(?:[-a-z]+\\\\s*){0,2}(italic|oblique))?)',\n    '(?=(?:(?:[-a-z]+\\\\s*){0,2}(small-caps))?)',\n    '(?=(?:(?:[-a-z]+\\\\s*){0,2}(bold(?:er)?|lighter|[1-9]00 ))?)',\n    '(?:(?:normal|\\\\1|\\\\2|\\\\3)\\\\s*){0,3}((?:xx?-)?',\n    '(?:small|large)|medium|smaller|larger|[\\\\.\\\\d]+(?:\\\\%|in|[cem]m|ex|p[ctx]))',\n    '(?:\\\\s*\\\\/\\\\s*(normal|[\\\\.\\\\d]+(?:\\\\%|in|[cem]m|ex|p[ctx])?))',\n    '?\\\\s*([-,\\\\\"\\\\\\'\\\\sa-z]+?)\\\\s*$',\n  ].join(''),\n  'i'\n);\nconst fontRegExMatchIndex = [\n  'style',\n  'variant',\n  'weight',\n  'size',\n  'lineHeight',\n  'family',\n];\n\n/**\n * Get the list of font families from a font spec.  Note that this doesn't work\n * for font families that have commas in them.\n * @param {string} fontSpec The CSS font property.\n * @return {FontParameters|null} The font parameters (or null if the input spec is invalid).\n */\nexport const getFontParameters = function (fontSpec) {\n  const match = fontSpec.match(fontRegEx);\n  if (!match) {\n    return null;\n  }\n  const style = /** @type {FontParameters} */ ({\n    lineHeight: 'normal',\n    size: '1.2em',\n    style: 'normal',\n    weight: 'normal',\n    variant: 'normal',\n  });\n  for (let i = 0, ii = fontRegExMatchIndex.length; i < ii; ++i) {\n    const value = match[i + 1];\n    if (value !== undefined) {\n      style[fontRegExMatchIndex[i]] = value;\n    }\n  }\n  style.families = style.family.split(/,\\s?/);\n  return style;\n};\n","/**\n * @module ol/render/canvas\n */\nimport BaseObject from '../Object.js';\nimport {WORKER_OFFSCREEN_CANVAS} from '../has.js';\nimport {clear} from '../obj.js';\nimport {createCanvasContext2D} from '../dom.js';\nimport {getFontParameters} from '../css.js';\n\n/**\n * @typedef {'Circle' | 'Image' | 'LineString' | 'Polygon' | 'Text' | 'Default'} BuilderType\n */\n\n/**\n * @typedef {Object} FillState\n * @property {import(\"../colorlike.js\").ColorLike} fillStyle FillStyle.\n */\n\n/**\n * @typedef Label\n * @property {number} width Width.\n * @property {number} height Height.\n * @property {Array<string|number>} contextInstructions ContextInstructions.\n */\n\n/**\n * @typedef {Object} FillStrokeState\n * @property {import(\"../colorlike.js\").ColorLike} [currentFillStyle] Current FillStyle.\n * @property {import(\"../colorlike.js\").ColorLike} [currentStrokeStyle] Current StrokeStyle.\n * @property {CanvasLineCap} [currentLineCap] Current LineCap.\n * @property {Array<number>} currentLineDash Current LineDash.\n * @property {number} [currentLineDashOffset] Current LineDashOffset.\n * @property {CanvasLineJoin} [currentLineJoin] Current LineJoin.\n * @property {number} [currentLineWidth] Current LineWidth.\n * @property {number} [currentMiterLimit] Current MiterLimit.\n * @property {number} [lastStroke] Last stroke.\n * @property {import(\"../colorlike.js\").ColorLike} [fillStyle] FillStyle.\n * @property {import(\"../colorlike.js\").ColorLike} [strokeStyle] StrokeStyle.\n * @property {CanvasLineCap} [lineCap] LineCap.\n * @property {Array<number>} lineDash LineDash.\n * @property {number} [lineDashOffset] LineDashOffset.\n * @property {CanvasLineJoin} [lineJoin] LineJoin.\n * @property {number} [lineWidth] LineWidth.\n * @property {number} [miterLimit] MiterLimit.\n */\n\n/**\n * @typedef {Object} StrokeState\n * @property {CanvasLineCap} lineCap LineCap.\n * @property {Array<number>} lineDash LineDash.\n * @property {number} lineDashOffset LineDashOffset.\n * @property {CanvasLineJoin} lineJoin LineJoin.\n * @property {number} lineWidth LineWidth.\n * @property {number} miterLimit MiterLimit.\n * @property {import(\"../colorlike.js\").ColorLike} strokeStyle StrokeStyle.\n */\n\n/**\n * @typedef {Object} TextState\n * @property {string} font Font.\n * @property {CanvasTextAlign} [textAlign] TextAlign.\n * @property {number} [repeat] Repeat.\n * @property {import(\"../style/Text.js\").TextJustify} [justify] Justify.\n * @property {CanvasTextBaseline} textBaseline TextBaseline.\n * @property {import(\"../style/Text.js\").TextPlacement} [placement] Placement.\n * @property {number} [maxAngle] MaxAngle.\n * @property {boolean} [overflow] Overflow.\n * @property {import(\"../style/Fill.js\").default} [backgroundFill] BackgroundFill.\n * @property {import(\"../style/Stroke.js\").default} [backgroundStroke] BackgroundStroke.\n * @property {import(\"../size.js\").Size} [scale] Scale.\n * @property {Array<number>} [padding] Padding.\n */\n\n/**\n * @typedef {Object} SerializableInstructions\n * @property {Array<*>} instructions The rendering instructions.\n * @property {Array<*>} hitDetectionInstructions The rendering hit detection instructions.\n * @property {Array<number>} coordinates The array of all coordinates.\n * @property {!Object<string, TextState>} [textStates] The text states (decluttering).\n * @property {!Object<string, FillState>} [fillStates] The fill states (decluttering).\n * @property {!Object<string, StrokeState>} [strokeStates] The stroke states (decluttering).\n */\n\n/**\n * @typedef {Object<number, import(\"./canvas/Executor.js\").ReplayImageOrLabelArgs>} DeclutterImageWithText\n */\n\n/**\n * @const\n * @type {string}\n */\nexport const defaultFont = '10px sans-serif';\n\n/**\n * @const\n * @type {import(\"../colorlike.js\").ColorLike}\n */\nexport const defaultFillStyle = '#000';\n\n/**\n * @const\n * @type {CanvasLineCap}\n */\nexport const defaultLineCap = 'round';\n\n/**\n * @const\n * @type {Array<number>}\n */\nexport const defaultLineDash = [];\n\n/**\n * @const\n * @type {number}\n */\nexport const defaultLineDashOffset = 0;\n\n/**\n * @const\n * @type {CanvasLineJoin}\n */\nexport const defaultLineJoin = 'round';\n\n/**\n * @const\n * @type {number}\n */\nexport const defaultMiterLimit = 10;\n\n/**\n * @const\n * @type {import(\"../colorlike.js\").ColorLike}\n */\nexport const defaultStrokeStyle = '#000';\n\n/**\n * @const\n * @type {CanvasTextAlign}\n */\nexport const defaultTextAlign = 'center';\n\n/**\n * @const\n * @type {CanvasTextBaseline}\n */\nexport const defaultTextBaseline = 'middle';\n\n/**\n * @const\n * @type {Array<number>}\n */\nexport const defaultPadding = [0, 0, 0, 0];\n\n/**\n * @const\n * @type {number}\n */\nexport const defaultLineWidth = 1;\n\n/**\n * @type {BaseObject}\n */\nexport const checkedFonts = new BaseObject();\n\n/**\n * @type {CanvasRenderingContext2D}\n */\nlet measureContext = null;\n\n/**\n * @type {string}\n */\nlet measureFont;\n\n/**\n * @type {!Object<string, number>}\n */\nexport const textHeights = {};\n\n/**\n * Clears the label cache when a font becomes available.\n * @param {string} fontSpec CSS font spec.\n */\nexport const registerFont = (function () {\n  const retries = 100;\n  const size = '32px ';\n  const referenceFonts = ['monospace', 'serif'];\n  const len = referenceFonts.length;\n  const text = 'wmytzilWMYTZIL@#/&?$%10\\uF013';\n  let interval, referenceWidth;\n\n  /**\n   * @param {string} fontStyle Css font-style\n   * @param {string} fontWeight Css font-weight\n   * @param {*} fontFamily Css font-family\n   * @return {boolean} Font with style and weight is available\n   */\n  function isAvailable(fontStyle, fontWeight, fontFamily) {\n    let available = true;\n    for (let i = 0; i < len; ++i) {\n      const referenceFont = referenceFonts[i];\n      referenceWidth = measureTextWidth(\n        fontStyle + ' ' + fontWeight + ' ' + size + referenceFont,\n        text\n      );\n      if (fontFamily != referenceFont) {\n        const width = measureTextWidth(\n          fontStyle +\n            ' ' +\n            fontWeight +\n            ' ' +\n            size +\n            fontFamily +\n            ',' +\n            referenceFont,\n          text\n        );\n        // If width and referenceWidth are the same, then the fallback was used\n        // instead of the font we wanted, so the font is not available.\n        available = available && width != referenceWidth;\n      }\n    }\n    if (available) {\n      return true;\n    }\n    return false;\n  }\n\n  function check() {\n    let done = true;\n    const fonts = checkedFonts.getKeys();\n    for (let i = 0, ii = fonts.length; i < ii; ++i) {\n      const font = fonts[i];\n      if (checkedFonts.get(font) < retries) {\n        if (isAvailable.apply(this, font.split('\\n'))) {\n          clear(textHeights);\n          // Make sure that loaded fonts are picked up by Safari\n          measureContext = null;\n          measureFont = undefined;\n          checkedFonts.set(font, retries);\n        } else {\n          checkedFonts.set(font, checkedFonts.get(font) + 1, true);\n          done = false;\n        }\n      }\n    }\n    if (done) {\n      clearInterval(interval);\n      interval = undefined;\n    }\n  }\n\n  return function (fontSpec) {\n    const font = getFontParameters(fontSpec);\n    if (!font) {\n      return;\n    }\n    const families = font.families;\n    for (let i = 0, ii = families.length; i < ii; ++i) {\n      const family = families[i];\n      const key = font.style + '\\n' + font.weight + '\\n' + family;\n      if (checkedFonts.get(key) === undefined) {\n        checkedFonts.set(key, retries, true);\n        if (!isAvailable(font.style, font.weight, family)) {\n          checkedFonts.set(key, 0, true);\n          if (interval === undefined) {\n            interval = setInterval(check, 32);\n          }\n        }\n      }\n    }\n  };\n})();\n\n/**\n * @param {string} font Font to use for measuring.\n * @return {import(\"../size.js\").Size} Measurement.\n */\nexport const measureTextHeight = (function () {\n  /**\n   * @type {HTMLDivElement}\n   */\n  let measureElement;\n  return function (fontSpec) {\n    let height = textHeights[fontSpec];\n    if (height == undefined) {\n      if (WORKER_OFFSCREEN_CANVAS) {\n        const font = getFontParameters(fontSpec);\n        const metrics = measureText(fontSpec, 'Žg');\n        const lineHeight = isNaN(Number(font.lineHeight))\n          ? 1.2\n          : Number(font.lineHeight);\n        height =\n          lineHeight *\n          (metrics.actualBoundingBoxAscent + metrics.actualBoundingBoxDescent);\n      } else {\n        if (!measureElement) {\n          measureElement = document.createElement('div');\n          measureElement.innerHTML = 'M';\n          measureElement.style.minHeight = '0';\n          measureElement.style.maxHeight = 'none';\n          measureElement.style.height = 'auto';\n          measureElement.style.padding = '0';\n          measureElement.style.border = 'none';\n          measureElement.style.position = 'absolute';\n          measureElement.style.display = 'block';\n          measureElement.style.left = '-99999px';\n        }\n        measureElement.style.font = fontSpec;\n        document.body.appendChild(measureElement);\n        height = measureElement.offsetHeight;\n        document.body.removeChild(measureElement);\n      }\n      textHeights[fontSpec] = height;\n    }\n    return height;\n  };\n})();\n\n/**\n * @param {string} font Font.\n * @param {string} text Text.\n * @return {TextMetrics} Text metrics.\n */\nfunction measureText(font, text) {\n  if (!measureContext) {\n    measureContext = createCanvasContext2D(1, 1);\n  }\n  if (font != measureFont) {\n    measureContext.font = font;\n    measureFont = measureContext.font;\n  }\n  return measureContext.measureText(text);\n}\n\n/**\n * @param {string} font Font.\n * @param {string} text Text.\n * @return {number} Width.\n */\nexport function measureTextWidth(font, text) {\n  return measureText(font, text).width;\n}\n\n/**\n * Measure text width using a cache.\n * @param {string} font The font.\n * @param {string} text The text to measure.\n * @param {Object<string, number>} cache A lookup of cached widths by text.\n * @return {number} The text width.\n */\nexport function measureAndCacheTextWidth(font, text, cache) {\n  if (text in cache) {\n    return cache[text];\n  }\n  const width = text\n    .split('\\n')\n    .reduce((prev, curr) => Math.max(prev, measureTextWidth(font, curr)), 0);\n  cache[text] = width;\n  return width;\n}\n\n/**\n * @param {TextState} baseStyle Base style.\n * @param {Array<string>} chunks Text chunks to measure.\n * @return {{width: number, height: number, widths: Array<number>, heights: Array<number>, lineWidths: Array<number>}}} Text metrics.\n */\nexport function getTextDimensions(baseStyle, chunks) {\n  const widths = [];\n  const heights = [];\n  const lineWidths = [];\n  let width = 0;\n  let lineWidth = 0;\n  let height = 0;\n  let lineHeight = 0;\n  for (let i = 0, ii = chunks.length; i <= ii; i += 2) {\n    const text = chunks[i];\n    if (text === '\\n' || i === ii) {\n      width = Math.max(width, lineWidth);\n      lineWidths.push(lineWidth);\n      lineWidth = 0;\n      height += lineHeight;\n      continue;\n    }\n    const font = chunks[i + 1] || baseStyle.font;\n    const currentWidth = measureTextWidth(font, text);\n    widths.push(currentWidth);\n    lineWidth += currentWidth;\n    const currentHeight = measureTextHeight(font);\n    heights.push(currentHeight);\n    lineHeight = Math.max(lineHeight, currentHeight);\n  }\n  return {width, height, widths, heights, lineWidths};\n}\n\n/**\n * @param {CanvasRenderingContext2D} context Context.\n * @param {number} rotation Rotation.\n * @param {number} offsetX X offset.\n * @param {number} offsetY Y offset.\n */\nexport function rotateAtOffset(context, rotation, offsetX, offsetY) {\n  if (rotation !== 0) {\n    context.translate(offsetX, offsetY);\n    context.rotate(rotation);\n    context.translate(-offsetX, -offsetY);\n  }\n}\n\n/**\n * @param {CanvasRenderingContext2D} context Context.\n * @param {import(\"../transform.js\").Transform|null} transform Transform.\n * @param {number} opacity Opacity.\n * @param {Label|HTMLCanvasElement|HTMLImageElement|HTMLVideoElement} labelOrImage Label.\n * @param {number} originX Origin X.\n * @param {number} originY Origin Y.\n * @param {number} w Width.\n * @param {number} h Height.\n * @param {number} x X.\n * @param {number} y Y.\n * @param {import(\"../size.js\").Size} scale Scale.\n */\nexport function drawImageOrLabel(\n  context,\n  transform,\n  opacity,\n  labelOrImage,\n  originX,\n  originY,\n  w,\n  h,\n  x,\n  y,\n  scale\n) {\n  context.save();\n\n  if (opacity !== 1) {\n    context.globalAlpha *= opacity;\n  }\n  if (transform) {\n    context.setTransform.apply(context, transform);\n  }\n\n  if (/** @type {*} */ (labelOrImage).contextInstructions) {\n    // label\n    context.translate(x, y);\n    context.scale(scale[0], scale[1]);\n    executeLabelInstructions(/** @type {Label} */ (labelOrImage), context);\n  } else if (scale[0] < 0 || scale[1] < 0) {\n    // flipped image\n    context.translate(x, y);\n    context.scale(scale[0], scale[1]);\n    context.drawImage(\n      /** @type {HTMLCanvasElement|HTMLImageElement|HTMLVideoElement} */ (\n        labelOrImage\n      ),\n      originX,\n      originY,\n      w,\n      h,\n      0,\n      0,\n      w,\n      h\n    );\n  } else {\n    // if image not flipped translate and scale can be avoided\n    context.drawImage(\n      /** @type {HTMLCanvasElement|HTMLImageElement|HTMLVideoElement} */ (\n        labelOrImage\n      ),\n      originX,\n      originY,\n      w,\n      h,\n      x,\n      y,\n      w * scale[0],\n      h * scale[1]\n    );\n  }\n\n  context.restore();\n}\n\n/**\n * @param {Label} label Label.\n * @param {CanvasRenderingContext2D} context Context.\n */\nfunction executeLabelInstructions(label, context) {\n  const contextInstructions = label.contextInstructions;\n  for (let i = 0, ii = contextInstructions.length; i < ii; i += 2) {\n    if (Array.isArray(contextInstructions[i + 1])) {\n      context[contextInstructions[i]].apply(\n        context,\n        contextInstructions[i + 1]\n      );\n    } else {\n      context[contextInstructions[i]] = contextInstructions[i + 1];\n    }\n  }\n}\n","/**\n * @module ol/renderer/Composite\n */\nimport MapRenderer from './Map.js';\nimport ObjectEventType from '../ObjectEventType.js';\nimport RenderEvent from '../render/Event.js';\nimport RenderEventType from '../render/EventType.js';\nimport {CLASS_UNSELECTABLE} from '../css.js';\nimport {checkedFonts} from '../render/canvas.js';\nimport {inView} from '../layer/Layer.js';\nimport {listen, unlistenByKey} from '../events.js';\nimport {replaceChildren} from '../dom.js';\n\n/**\n * @classdesc\n * Canvas map renderer.\n * @api\n */\nclass CompositeMapRenderer extends MapRenderer {\n  /**\n   * @param {import(\"../Map.js\").default} map Map.\n   */\n  constructor(map) {\n    super(map);\n\n    /**\n     * @type {import(\"../events.js\").EventsKey}\n     */\n    this.fontChangeListenerKey_ = listen(\n      checkedFonts,\n      ObjectEventType.PROPERTYCHANGE,\n      map.redrawText.bind(map)\n    );\n\n    /**\n     * @private\n     * @type {HTMLDivElement}\n     */\n    this.element_ = document.createElement('div');\n    const style = this.element_.style;\n    style.position = 'absolute';\n    style.width = '100%';\n    style.height = '100%';\n    style.zIndex = '0';\n\n    this.element_.className = CLASS_UNSELECTABLE + ' ol-layers';\n\n    const container = map.getViewport();\n    container.insertBefore(this.element_, container.firstChild || null);\n\n    /**\n     * @private\n     * @type {Array<HTMLElement>}\n     */\n    this.children_ = [];\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.renderedVisible_ = true;\n  }\n\n  /**\n   * @param {import(\"../render/EventType.js\").default} type Event type.\n   * @param {import(\"../Map.js\").FrameState} frameState Frame state.\n   */\n  dispatchRenderEvent(type, frameState) {\n    const map = this.getMap();\n    if (map.hasListener(type)) {\n      const event = new RenderEvent(type, undefined, frameState);\n      map.dispatchEvent(event);\n    }\n  }\n\n  disposeInternal() {\n    unlistenByKey(this.fontChangeListenerKey_);\n    this.element_.parentNode.removeChild(this.element_);\n    super.disposeInternal();\n  }\n\n  /**\n   * Render.\n   * @param {?import(\"../Map.js\").FrameState} frameState Frame state.\n   */\n  renderFrame(frameState) {\n    if (!frameState) {\n      if (this.renderedVisible_) {\n        this.element_.style.display = 'none';\n        this.renderedVisible_ = false;\n      }\n      return;\n    }\n\n    this.calculateMatrices2D(frameState);\n    this.dispatchRenderEvent(RenderEventType.PRECOMPOSE, frameState);\n\n    const layerStatesArray = frameState.layerStatesArray.sort(function (a, b) {\n      return a.zIndex - b.zIndex;\n    });\n    const viewState = frameState.viewState;\n\n    this.children_.length = 0;\n    /**\n     * @type {Array<import(\"../layer/BaseVector.js\").default>}\n     */\n    const declutterLayers = [];\n    let previousElement = null;\n    for (let i = 0, ii = layerStatesArray.length; i < ii; ++i) {\n      const layerState = layerStatesArray[i];\n      frameState.layerIndex = i;\n\n      const layer = layerState.layer;\n      const sourceState = layer.getSourceState();\n      if (\n        !inView(layerState, viewState) ||\n        (sourceState != 'ready' && sourceState != 'undefined')\n      ) {\n        layer.unrender();\n        continue;\n      }\n\n      const element = layer.render(frameState, previousElement);\n      if (!element) {\n        continue;\n      }\n      if (element !== previousElement) {\n        this.children_.push(element);\n        previousElement = element;\n      }\n      if ('getDeclutter' in layer) {\n        declutterLayers.push(\n          /** @type {import(\"../layer/BaseVector.js\").default} */ (layer)\n        );\n      }\n    }\n    for (let i = declutterLayers.length - 1; i >= 0; --i) {\n      declutterLayers[i].renderDeclutter(frameState);\n    }\n\n    replaceChildren(this.element_, this.children_);\n\n    this.dispatchRenderEvent(RenderEventType.POSTCOMPOSE, frameState);\n\n    if (!this.renderedVisible_) {\n      this.element_.style.display = '';\n      this.renderedVisible_ = true;\n    }\n\n    this.scheduleExpireIconCache(frameState);\n  }\n}\n\nexport default CompositeMapRenderer;\n","/**\n * @module ol/layer/Group\n */\nimport BaseLayer from './Base.js';\nimport Collection from '../Collection.js';\nimport CollectionEventType from '../CollectionEventType.js';\nimport Event from '../events/Event.js';\nimport EventType from '../events/EventType.js';\nimport ObjectEventType from '../ObjectEventType.js';\nimport {assert} from '../asserts.js';\nimport {clear} from '../obj.js';\nimport {getIntersection} from '../extent.js';\nimport {getUid} from '../util.js';\nimport {listen, unlistenByKey} from '../events.js';\n\n/**\n * @typedef {'addlayer'|'removelayer'} EventType\n */\n\n/**\n * @classdesc\n * A layer group triggers 'addlayer' and 'removelayer' events when layers are added to or removed from\n * the group or one of its child groups.  When a layer group is added to or removed from another layer group,\n * a single event will be triggered (instead of one per layer in the group added or removed).\n */\nexport class GroupEvent extends Event {\n  /**\n   * @param {EventType} type The event type.\n   * @param {BaseLayer} layer The layer.\n   */\n  constructor(type, layer) {\n    super(type);\n\n    /**\n     * The added or removed layer.\n     * @type {BaseLayer}\n     * @api\n     */\n    this.layer = layer;\n  }\n}\n\n/***\n * @template Return\n * @typedef {import(\"../Observable\").OnSignature<import(\"../Observable\").EventTypes, import(\"../events/Event.js\").default, Return> &\n *   import(\"../Observable\").OnSignature<import(\"./Base\").BaseLayerObjectEventTypes|\n *     'change:layers', import(\"../Object\").ObjectEvent, Return> &\n *   import(\"../Observable\").CombinedOnSignature<import(\"../Observable\").EventTypes|import(\"./Base\").BaseLayerObjectEventTypes|'change:layers', Return>} GroupOnSignature\n */\n\n/**\n * @typedef {Object} Options\n * @property {number} [opacity=1] Opacity (0, 1).\n * @property {boolean} [visible=true] Visibility.\n * @property {import(\"../extent.js\").Extent} [extent] The bounding extent for layer rendering.  The layer will not be\n * rendered outside of this extent.\n * @property {number} [zIndex] The z-index for layer rendering.  At rendering time, the layers\n * will be ordered, first by Z-index and then by position. When `undefined`, a `zIndex` of 0 is assumed\n * for layers that are added to the map's `layers` collection, or `Infinity` when the layer's `setMap()`\n * method was used.\n * @property {number} [minResolution] The minimum resolution (inclusive) at which this layer will be\n * visible.\n * @property {number} [maxResolution] The maximum resolution (exclusive) below which this layer will\n * be visible.\n * @property {number} [minZoom] The minimum view zoom level (exclusive) above which this layer will be\n * visible.\n * @property {number} [maxZoom] The maximum view zoom level (inclusive) at which this layer will\n * be visible.\n * @property {Array<import(\"./Base.js\").default>|Collection<import(\"./Base.js\").default>} [layers] Child layers.\n * @property {Object<string, *>} [properties] Arbitrary observable properties. Can be accessed with `#get()` and `#set()`.\n */\n\n/**\n * @enum {string}\n * @private\n */\nconst Property = {\n  LAYERS: 'layers',\n};\n\n/**\n * @classdesc\n * A {@link module:ol/Collection~Collection} of layers that are handled together.\n *\n * A generic `change` event is triggered when the group/Collection changes.\n *\n * @api\n */\nclass LayerGroup extends BaseLayer {\n  /**\n   * @param {Options} [options] Layer options.\n   */\n  constructor(options) {\n    options = options || {};\n    const baseOptions = /** @type {Options} */ (Object.assign({}, options));\n    delete baseOptions.layers;\n\n    let layers = options.layers;\n\n    super(baseOptions);\n\n    /***\n     * @type {GroupOnSignature<import(\"../events\").EventsKey>}\n     */\n    this.on;\n\n    /***\n     * @type {GroupOnSignature<import(\"../events\").EventsKey>}\n     */\n    this.once;\n\n    /***\n     * @type {GroupOnSignature<void>}\n     */\n    this.un;\n\n    /**\n     * @private\n     * @type {Array<import(\"../events.js\").EventsKey>}\n     */\n    this.layersListenerKeys_ = [];\n\n    /**\n     * @private\n     * @type {Object<string, Array<import(\"../events.js\").EventsKey>>}\n     */\n    this.listenerKeys_ = {};\n\n    this.addChangeListener(Property.LAYERS, this.handleLayersChanged_);\n\n    if (layers) {\n      if (Array.isArray(layers)) {\n        layers = new Collection(layers.slice(), {unique: true});\n      } else {\n        assert(typeof (/** @type {?} */ (layers).getArray) === 'function', 43); // Expected `layers` to be an array or a `Collection`\n      }\n    } else {\n      layers = new Collection(undefined, {unique: true});\n    }\n\n    this.setLayers(layers);\n  }\n\n  /**\n   * @private\n   */\n  handleLayerChange_() {\n    this.changed();\n  }\n\n  /**\n   * @private\n   */\n  handleLayersChanged_() {\n    this.layersListenerKeys_.forEach(unlistenByKey);\n    this.layersListenerKeys_.length = 0;\n\n    const layers = this.getLayers();\n    this.layersListenerKeys_.push(\n      listen(layers, CollectionEventType.ADD, this.handleLayersAdd_, this),\n      listen(layers, CollectionEventType.REMOVE, this.handleLayersRemove_, this)\n    );\n\n    for (const id in this.listenerKeys_) {\n      this.listenerKeys_[id].forEach(unlistenByKey);\n    }\n    clear(this.listenerKeys_);\n\n    const layersArray = layers.getArray();\n    for (let i = 0, ii = layersArray.length; i < ii; i++) {\n      const layer = layersArray[i];\n      this.registerLayerListeners_(layer);\n      this.dispatchEvent(new GroupEvent('addlayer', layer));\n    }\n    this.changed();\n  }\n\n  /**\n   * @param {BaseLayer} layer The layer.\n   */\n  registerLayerListeners_(layer) {\n    const listenerKeys = [\n      listen(\n        layer,\n        ObjectEventType.PROPERTYCHANGE,\n        this.handleLayerChange_,\n        this\n      ),\n      listen(layer, EventType.CHANGE, this.handleLayerChange_, this),\n    ];\n\n    if (layer instanceof LayerGroup) {\n      listenerKeys.push(\n        listen(layer, 'addlayer', this.handleLayerGroupAdd_, this),\n        listen(layer, 'removelayer', this.handleLayerGroupRemove_, this)\n      );\n    }\n\n    this.listenerKeys_[getUid(layer)] = listenerKeys;\n  }\n\n  /**\n   * @param {GroupEvent} event The layer group event.\n   */\n  handleLayerGroupAdd_(event) {\n    this.dispatchEvent(new GroupEvent('addlayer', event.layer));\n  }\n\n  /**\n   * @param {GroupEvent} event The layer group event.\n   */\n  handleLayerGroupRemove_(event) {\n    this.dispatchEvent(new GroupEvent('removelayer', event.layer));\n  }\n\n  /**\n   * @param {import(\"../Collection.js\").CollectionEvent<import(\"./Base.js\").default>} collectionEvent CollectionEvent.\n   * @private\n   */\n  handleLayersAdd_(collectionEvent) {\n    const layer = collectionEvent.element;\n    this.registerLayerListeners_(layer);\n    this.dispatchEvent(new GroupEvent('addlayer', layer));\n    this.changed();\n  }\n\n  /**\n   * @param {import(\"../Collection.js\").CollectionEvent<import(\"./Base.js\").default>} collectionEvent CollectionEvent.\n   * @private\n   */\n  handleLayersRemove_(collectionEvent) {\n    const layer = collectionEvent.element;\n    const key = getUid(layer);\n    this.listenerKeys_[key].forEach(unlistenByKey);\n    delete this.listenerKeys_[key];\n    this.dispatchEvent(new GroupEvent('removelayer', layer));\n    this.changed();\n  }\n\n  /**\n   * Returns the {@link module:ol/Collection~Collection collection} of {@link module:ol/layer/Layer~Layer layers}\n   * in this group.\n   * @return {!Collection<import(\"./Base.js\").default>} Collection of\n   *   {@link module:ol/layer/Base~BaseLayer layers} that are part of this group.\n   * @observable\n   * @api\n   */\n  getLayers() {\n    return /** @type {!Collection<import(\"./Base.js\").default>} */ (\n      this.get(Property.LAYERS)\n    );\n  }\n\n  /**\n   * Set the {@link module:ol/Collection~Collection collection} of {@link module:ol/layer/Layer~Layer layers}\n   * in this group.\n   * @param {!Collection<import(\"./Base.js\").default>} layers Collection of\n   *   {@link module:ol/layer/Base~BaseLayer layers} that are part of this group.\n   * @observable\n   * @api\n   */\n  setLayers(layers) {\n    const collection = this.getLayers();\n    if (collection) {\n      const currentLayers = collection.getArray();\n      for (let i = 0, ii = currentLayers.length; i < ii; ++i) {\n        this.dispatchEvent(new GroupEvent('removelayer', currentLayers[i]));\n      }\n    }\n\n    this.set(Property.LAYERS, layers);\n  }\n\n  /**\n   * @param {Array<import(\"./Layer.js\").default>} [array] Array of layers (to be modified in place).\n   * @return {Array<import(\"./Layer.js\").default>} Array of layers.\n   */\n  getLayersArray(array) {\n    array = array !== undefined ? array : [];\n    this.getLayers().forEach(function (layer) {\n      layer.getLayersArray(array);\n    });\n    return array;\n  }\n\n  /**\n   * Get the layer states list and use this groups z-index as the default\n   * for all layers in this and nested groups, if it is unset at this point.\n   * If dest is not provided and this group's z-index is undefined\n   * 0 is used a the default z-index.\n   * @param {Array<import(\"./Layer.js\").State>} [dest] Optional list\n   * of layer states (to be modified in place).\n   * @return {Array<import(\"./Layer.js\").State>} List of layer states.\n   */\n  getLayerStatesArray(dest) {\n    const states = dest !== undefined ? dest : [];\n    const pos = states.length;\n\n    this.getLayers().forEach(function (layer) {\n      layer.getLayerStatesArray(states);\n    });\n\n    const ownLayerState = this.getLayerState();\n    let defaultZIndex = ownLayerState.zIndex;\n    if (!dest && ownLayerState.zIndex === undefined) {\n      defaultZIndex = 0;\n    }\n    for (let i = pos, ii = states.length; i < ii; i++) {\n      const layerState = states[i];\n      layerState.opacity *= ownLayerState.opacity;\n      layerState.visible = layerState.visible && ownLayerState.visible;\n      layerState.maxResolution = Math.min(\n        layerState.maxResolution,\n        ownLayerState.maxResolution\n      );\n      layerState.minResolution = Math.max(\n        layerState.minResolution,\n        ownLayerState.minResolution\n      );\n      layerState.minZoom = Math.max(layerState.minZoom, ownLayerState.minZoom);\n      layerState.maxZoom = Math.min(layerState.maxZoom, ownLayerState.maxZoom);\n      if (ownLayerState.extent !== undefined) {\n        if (layerState.extent !== undefined) {\n          layerState.extent = getIntersection(\n            layerState.extent,\n            ownLayerState.extent\n          );\n        } else {\n          layerState.extent = ownLayerState.extent;\n        }\n      }\n      if (layerState.zIndex === undefined) {\n        layerState.zIndex = defaultZIndex;\n      }\n    }\n\n    return states;\n  }\n\n  /**\n   * @return {import(\"../source/Source.js\").State} Source state.\n   */\n  getSourceState() {\n    return 'ready';\n  }\n}\n\nexport default LayerGroup;\n","/**\n * @module ol/MapEvent\n */\nimport Event from './events/Event.js';\n\n/**\n * @classdesc\n * Events emitted as map events are instances of this type.\n * See {@link module:ol/Map~Map} for which events trigger a map event.\n */\nclass MapEvent extends Event {\n  /**\n   * @param {string} type Event type.\n   * @param {import(\"./Map.js\").default} map Map.\n   * @param {?import(\"./Map.js\").FrameState} [frameState] Frame state.\n   */\n  constructor(type, map, frameState) {\n    super(type);\n\n    /**\n     * The map where the event occurred.\n     * @type {import(\"./Map.js\").default}\n     * @api\n     */\n    this.map = map;\n\n    /**\n     * The frame state at the time of the event.\n     * @type {?import(\"./Map.js\").FrameState}\n     * @api\n     */\n    this.frameState = frameState !== undefined ? frameState : null;\n  }\n}\n\nexport default MapEvent;\n","/**\n * @module ol/MapBrowserEvent\n */\nimport MapEvent from './MapEvent.js';\n\n/**\n * @classdesc\n * Events emitted as map browser events are instances of this type.\n * See {@link module:ol/Map~Map} for which events trigger a map browser event.\n * @template {UIEvent} EVENT\n */\nclass MapBrowserEvent extends MapEvent {\n  /**\n   * @param {string} type Event type.\n   * @param {import(\"./Map.js\").default} map Map.\n   * @param {EVENT} originalEvent Original event.\n   * @param {boolean} [dragging] Is the map currently being dragged?\n   * @param {import(\"./Map.js\").FrameState} [frameState] Frame state.\n   * @param {Array<PointerEvent>} [activePointers] Active pointers.\n   */\n  constructor(type, map, originalEvent, dragging, frameState, activePointers) {\n    super(type, map, frameState);\n\n    /**\n     * The original browser event.\n     * @const\n     * @type {EVENT}\n     * @api\n     */\n    this.originalEvent = originalEvent;\n\n    /**\n     * The map pixel relative to the viewport corresponding to the original browser event.\n     * @type {?import(\"./pixel.js\").Pixel}\n     */\n    this.pixel_ = null;\n\n    /**\n     * The coordinate in the user projection corresponding to the original browser event.\n     * @type {?import(\"./coordinate.js\").Coordinate}\n     */\n    this.coordinate_ = null;\n\n    /**\n     * Indicates if the map is currently being dragged. Only set for\n     * `POINTERDRAG` and `POINTERMOVE` events. Default is `false`.\n     *\n     * @type {boolean}\n     * @api\n     */\n    this.dragging = dragging !== undefined ? dragging : false;\n\n    /**\n     * @type {Array<PointerEvent>|undefined}\n     */\n    this.activePointers = activePointers;\n  }\n\n  /**\n   * The map pixel relative to the viewport corresponding to the original event.\n   * @type {import(\"./pixel.js\").Pixel}\n   * @api\n   */\n  get pixel() {\n    if (!this.pixel_) {\n      this.pixel_ = this.map.getEventPixel(this.originalEvent);\n    }\n    return this.pixel_;\n  }\n  set pixel(pixel) {\n    this.pixel_ = pixel;\n  }\n\n  /**\n   * The coordinate corresponding to the original browser event.  This will be in the user\n   * projection if one is set.  Otherwise it will be in the view projection.\n   * @type {import(\"./coordinate.js\").Coordinate}\n   * @api\n   */\n  get coordinate() {\n    if (!this.coordinate_) {\n      this.coordinate_ = this.map.getCoordinateFromPixel(this.pixel);\n    }\n    return this.coordinate_;\n  }\n  set coordinate(coordinate) {\n    this.coordinate_ = coordinate;\n  }\n\n  /**\n   * Prevents the default browser action.\n   * See https://developer.mozilla.org/en-US/docs/Web/API/event.preventDefault.\n   * @api\n   */\n  preventDefault() {\n    super.preventDefault();\n    if ('preventDefault' in this.originalEvent) {\n      /** @type {UIEvent} */ (this.originalEvent).preventDefault();\n    }\n  }\n\n  /**\n   * Prevents further propagation of the current event.\n   * See https://developer.mozilla.org/en-US/docs/Web/API/event.stopPropagation.\n   * @api\n   */\n  stopPropagation() {\n    super.stopPropagation();\n    if ('stopPropagation' in this.originalEvent) {\n      /** @type {UIEvent} */ (this.originalEvent).stopPropagation();\n    }\n  }\n}\n\nexport default MapBrowserEvent;\n","/**\n * @module ol/MapBrowserEventType\n */\nimport EventType from './events/EventType.js';\n\n/**\n * Constants for event names.\n * @enum {string}\n */\nexport default {\n  /**\n   * A true single click with no dragging and no double click. Note that this\n   * event is delayed by 250 ms to ensure that it is not a double click.\n   * @event module:ol/MapBrowserEvent~MapBrowserEvent#singleclick\n   * @api\n   */\n  SINGLECLICK: 'singleclick',\n\n  /**\n   * A click with no dragging. A double click will fire two of this.\n   * @event module:ol/MapBrowserEvent~MapBrowserEvent#click\n   * @api\n   */\n  CLICK: EventType.CLICK,\n\n  /**\n   * A true double click, with no dragging.\n   * @event module:ol/MapBrowserEvent~MapBrowserEvent#dblclick\n   * @api\n   */\n  DBLCLICK: EventType.DBLCLICK,\n\n  /**\n   * Triggered when a pointer is dragged.\n   * @event module:ol/MapBrowserEvent~MapBrowserEvent#pointerdrag\n   * @api\n   */\n  POINTERDRAG: 'pointerdrag',\n\n  /**\n   * Triggered when a pointer is moved. Note that on touch devices this is\n   * triggered when the map is panned, so is not the same as mousemove.\n   * @event module:ol/MapBrowserEvent~MapBrowserEvent#pointermove\n   * @api\n   */\n  POINTERMOVE: 'pointermove',\n\n  POINTERDOWN: 'pointerdown',\n  POINTERUP: 'pointerup',\n  POINTEROVER: 'pointerover',\n  POINTEROUT: 'pointerout',\n  POINTERENTER: 'pointerenter',\n  POINTERLEAVE: 'pointerleave',\n  POINTERCANCEL: 'pointercancel',\n};\n\n/***\n * @typedef {'singleclick'|'click'|'dblclick'|'pointerdrag'|'pointermove'} Types\n */\n","/**\n * @module ol/pointer/EventType\n */\n\n/**\n * Constants for event names.\n * @enum {string}\n */\nexport default {\n  POINTERMOVE: 'pointermove',\n  POINTERDOWN: 'pointerdown',\n  POINTERUP: 'pointerup',\n  POINTEROVER: 'pointerover',\n  POINTEROUT: 'pointerout',\n  POINTERENTER: 'pointerenter',\n  POINTERLEAVE: 'pointerleave',\n  POINTERCANCEL: 'pointercancel',\n};\n","/**\n * @module ol/MapBrowserEventHandler\n */\n\nimport EventType from './events/EventType.js';\nimport MapBrowserEvent from './MapBrowserEvent.js';\nimport MapBrowserEventType from './MapBrowserEventType.js';\nimport PointerEventType from './pointer/EventType.js';\nimport Target from './events/Target.js';\nimport {PASSIVE_EVENT_LISTENERS} from './has.js';\nimport {listen, unlistenByKey} from './events.js';\n\nclass MapBrowserEventHandler extends Target {\n  /**\n   * @param {import(\"./Map.js\").default} map The map with the viewport to listen to events on.\n   * @param {number} [moveTolerance] The minimal distance the pointer must travel to trigger a move.\n   */\n  constructor(map, moveTolerance) {\n    super(map);\n\n    /**\n     * This is the element that we will listen to the real events on.\n     * @type {import(\"./Map.js\").default}\n     * @private\n     */\n    this.map_ = map;\n\n    /**\n     * @type {any}\n     * @private\n     */\n    this.clickTimeoutId_;\n\n    /**\n     * Emulate dblclick and singleclick. Will be true when only one pointer is active.\n     * @type {boolean}\n     */\n    this.emulateClicks_ = false;\n\n    /**\n     * @type {boolean}\n     * @private\n     */\n    this.dragging_ = false;\n\n    /**\n     * @type {!Array<import(\"./events.js\").EventsKey>}\n     * @private\n     */\n    this.dragListenerKeys_ = [];\n\n    /**\n     * @type {number}\n     * @private\n     */\n    this.moveTolerance_ = moveTolerance === undefined ? 1 : moveTolerance;\n\n    /**\n     * The most recent \"down\" type event (or null if none have occurred).\n     * Set on pointerdown.\n     * @type {PointerEvent|null}\n     * @private\n     */\n    this.down_ = null;\n\n    const element = this.map_.getViewport();\n\n    /**\n     * @type {Array<PointerEvent>}\n     * @private\n     */\n    this.activePointers_ = [];\n\n    /**\n     * @type {!Object<number, Event>}\n     * @private\n     */\n    this.trackedTouches_ = {};\n\n    this.element_ = element;\n\n    /**\n     * @type {?import(\"./events.js\").EventsKey}\n     * @private\n     */\n    this.pointerdownListenerKey_ = listen(\n      element,\n      PointerEventType.POINTERDOWN,\n      this.handlePointerDown_,\n      this\n    );\n\n    /**\n     * @type {PointerEvent}\n     * @private\n     */\n    this.originalPointerMoveEvent_;\n\n    /**\n     * @type {?import(\"./events.js\").EventsKey}\n     * @private\n     */\n    this.relayedListenerKey_ = listen(\n      element,\n      PointerEventType.POINTERMOVE,\n      this.relayMoveEvent_,\n      this\n    );\n\n    /**\n     * @private\n     */\n    this.boundHandleTouchMove_ = this.handleTouchMove_.bind(this);\n\n    this.element_.addEventListener(\n      EventType.TOUCHMOVE,\n      this.boundHandleTouchMove_,\n      PASSIVE_EVENT_LISTENERS ? {passive: false} : false\n    );\n  }\n\n  /**\n   * @param {PointerEvent} pointerEvent Pointer\n   * event.\n   * @private\n   */\n  emulateClick_(pointerEvent) {\n    let newEvent = new MapBrowserEvent(\n      MapBrowserEventType.CLICK,\n      this.map_,\n      pointerEvent\n    );\n    this.dispatchEvent(newEvent);\n    if (this.clickTimeoutId_ !== undefined) {\n      // double-click\n      clearTimeout(this.clickTimeoutId_);\n      this.clickTimeoutId_ = undefined;\n      newEvent = new MapBrowserEvent(\n        MapBrowserEventType.DBLCLICK,\n        this.map_,\n        pointerEvent\n      );\n      this.dispatchEvent(newEvent);\n    } else {\n      // click\n      this.clickTimeoutId_ = setTimeout(() => {\n        this.clickTimeoutId_ = undefined;\n        const newEvent = new MapBrowserEvent(\n          MapBrowserEventType.SINGLECLICK,\n          this.map_,\n          pointerEvent\n        );\n        this.dispatchEvent(newEvent);\n      }, 250);\n    }\n  }\n\n  /**\n   * Keeps track on how many pointers are currently active.\n   *\n   * @param {PointerEvent} pointerEvent Pointer\n   * event.\n   * @private\n   */\n  updateActivePointers_(pointerEvent) {\n    const event = pointerEvent;\n    const id = event.pointerId;\n\n    if (\n      event.type == MapBrowserEventType.POINTERUP ||\n      event.type == MapBrowserEventType.POINTERCANCEL\n    ) {\n      delete this.trackedTouches_[id];\n      for (const pointerId in this.trackedTouches_) {\n        if (this.trackedTouches_[pointerId].target !== event.target) {\n          // Some platforms assign a new pointerId when the target changes.\n          // If this happens, delete one tracked pointer. If there is more\n          // than one tracked pointer for the old target, it will be cleared\n          // by subsequent POINTERUP events from other pointers.\n          delete this.trackedTouches_[pointerId];\n          break;\n        }\n      }\n    } else if (\n      event.type == MapBrowserEventType.POINTERDOWN ||\n      event.type == MapBrowserEventType.POINTERMOVE\n    ) {\n      this.trackedTouches_[id] = event;\n    }\n    this.activePointers_ = Object.values(this.trackedTouches_);\n  }\n\n  /**\n   * @param {PointerEvent} pointerEvent Pointer\n   * event.\n   * @private\n   */\n  handlePointerUp_(pointerEvent) {\n    this.updateActivePointers_(pointerEvent);\n    const newEvent = new MapBrowserEvent(\n      MapBrowserEventType.POINTERUP,\n      this.map_,\n      pointerEvent,\n      undefined,\n      undefined,\n      this.activePointers_\n    );\n    this.dispatchEvent(newEvent);\n\n    // We emulate click events on left mouse button click, touch contact, and pen\n    // contact. isMouseActionButton returns true in these cases (evt.button is set\n    // to 0).\n    // See http://www.w3.org/TR/pointerevents/#button-states\n    // We only fire click, singleclick, and doubleclick if nobody has called\n    // event.preventDefault().\n    if (\n      this.emulateClicks_ &&\n      !newEvent.defaultPrevented &&\n      !this.dragging_ &&\n      this.isMouseActionButton_(pointerEvent)\n    ) {\n      this.emulateClick_(this.down_);\n    }\n\n    if (this.activePointers_.length === 0) {\n      this.dragListenerKeys_.forEach(unlistenByKey);\n      this.dragListenerKeys_.length = 0;\n      this.dragging_ = false;\n      this.down_ = null;\n    }\n  }\n\n  /**\n   * @param {PointerEvent} pointerEvent Pointer\n   * event.\n   * @return {boolean} If the left mouse button was pressed.\n   * @private\n   */\n  isMouseActionButton_(pointerEvent) {\n    return pointerEvent.button === 0;\n  }\n\n  /**\n   * @param {PointerEvent} pointerEvent Pointer\n   * event.\n   * @private\n   */\n  handlePointerDown_(pointerEvent) {\n    this.emulateClicks_ = this.activePointers_.length === 0;\n    this.updateActivePointers_(pointerEvent);\n    const newEvent = new MapBrowserEvent(\n      MapBrowserEventType.POINTERDOWN,\n      this.map_,\n      pointerEvent,\n      undefined,\n      undefined,\n      this.activePointers_\n    );\n    this.dispatchEvent(newEvent);\n\n    this.down_ = new PointerEvent(pointerEvent.type, pointerEvent);\n    Object.defineProperty(this.down_, 'target', {\n      writable: false,\n      value: pointerEvent.target,\n    });\n\n    if (this.dragListenerKeys_.length === 0) {\n      const doc = this.map_.getOwnerDocument();\n      this.dragListenerKeys_.push(\n        listen(\n          doc,\n          MapBrowserEventType.POINTERMOVE,\n          this.handlePointerMove_,\n          this\n        ),\n        listen(doc, MapBrowserEventType.POINTERUP, this.handlePointerUp_, this),\n        /* Note that the listener for `pointercancel is set up on\n         * `pointerEventHandler_` and not `documentPointerEventHandler_` like\n         * the `pointerup` and `pointermove` listeners.\n         *\n         * The reason for this is the following: `TouchSource.vacuumTouches_()`\n         * issues `pointercancel` events, when there was no `touchend` for a\n         * `touchstart`. Now, let's say a first `touchstart` is registered on\n         * `pointerEventHandler_`. The `documentPointerEventHandler_` is set up.\n         * But `documentPointerEventHandler_` doesn't know about the first\n         * `touchstart`. If there is no `touchend` for the `touchstart`, we can\n         * only receive a `touchcancel` from `pointerEventHandler_`, because it is\n         * only registered there.\n         */\n        listen(\n          this.element_,\n          MapBrowserEventType.POINTERCANCEL,\n          this.handlePointerUp_,\n          this\n        )\n      );\n      if (this.element_.getRootNode && this.element_.getRootNode() !== doc) {\n        this.dragListenerKeys_.push(\n          listen(\n            this.element_.getRootNode(),\n            MapBrowserEventType.POINTERUP,\n            this.handlePointerUp_,\n            this\n          )\n        );\n      }\n    }\n  }\n\n  /**\n   * @param {PointerEvent} pointerEvent Pointer\n   * event.\n   * @private\n   */\n  handlePointerMove_(pointerEvent) {\n    // Between pointerdown and pointerup, pointermove events are triggered.\n    // To avoid a 'false' touchmove event to be dispatched, we test if the pointer\n    // moved a significant distance.\n    if (this.isMoving_(pointerEvent)) {\n      this.updateActivePointers_(pointerEvent);\n      this.dragging_ = true;\n      const newEvent = new MapBrowserEvent(\n        MapBrowserEventType.POINTERDRAG,\n        this.map_,\n        pointerEvent,\n        this.dragging_,\n        undefined,\n        this.activePointers_\n      );\n      this.dispatchEvent(newEvent);\n    }\n  }\n\n  /**\n   * Wrap and relay a pointermove event.\n   * @param {PointerEvent} pointerEvent Pointer\n   * event.\n   * @private\n   */\n  relayMoveEvent_(pointerEvent) {\n    this.originalPointerMoveEvent_ = pointerEvent;\n    const dragging = !!(this.down_ && this.isMoving_(pointerEvent));\n    this.dispatchEvent(\n      new MapBrowserEvent(\n        MapBrowserEventType.POINTERMOVE,\n        this.map_,\n        pointerEvent,\n        dragging\n      )\n    );\n  }\n\n  /**\n   * Flexible handling of a `touch-action: none` css equivalent: because calling\n   * `preventDefault()` on a `pointermove` event does not stop native page scrolling\n   * and zooming, we also listen for `touchmove` and call `preventDefault()` on it\n   * when an interaction (currently `DragPan` handles the event.\n   * @param {TouchEvent} event Event.\n   * @private\n   */\n  handleTouchMove_(event) {\n    // Due to https://github.com/mpizenberg/elm-pep/issues/2, `this.originalPointerMoveEvent_`\n    // may not be initialized yet when we get here on a platform without native pointer events,\n    // when elm-pep is used as pointer events polyfill.\n    const originalEvent = this.originalPointerMoveEvent_;\n    if (\n      (!originalEvent || originalEvent.defaultPrevented) &&\n      (typeof event.cancelable !== 'boolean' || event.cancelable === true)\n    ) {\n      event.preventDefault();\n    }\n  }\n\n  /**\n   * @param {PointerEvent} pointerEvent Pointer\n   * event.\n   * @return {boolean} Is moving.\n   * @private\n   */\n  isMoving_(pointerEvent) {\n    return (\n      this.dragging_ ||\n      Math.abs(pointerEvent.clientX - this.down_.clientX) >\n        this.moveTolerance_ ||\n      Math.abs(pointerEvent.clientY - this.down_.clientY) > this.moveTolerance_\n    );\n  }\n\n  /**\n   * Clean up.\n   */\n  disposeInternal() {\n    if (this.relayedListenerKey_) {\n      unlistenByKey(this.relayedListenerKey_);\n      this.relayedListenerKey_ = null;\n    }\n    this.element_.removeEventListener(\n      EventType.TOUCHMOVE,\n      this.boundHandleTouchMove_\n    );\n\n    if (this.pointerdownListenerKey_) {\n      unlistenByKey(this.pointerdownListenerKey_);\n      this.pointerdownListenerKey_ = null;\n    }\n\n    this.dragListenerKeys_.forEach(unlistenByKey);\n    this.dragListenerKeys_.length = 0;\n\n    this.element_ = null;\n    super.disposeInternal();\n  }\n}\n\nexport default MapBrowserEventHandler;\n","/**\n * @module ol/MapEventType\n */\n\n/**\n * @enum {string}\n */\nexport default {\n  /**\n   * Triggered after a map frame is rendered.\n   * @event module:ol/MapEvent~MapEvent#postrender\n   * @api\n   */\n  POSTRENDER: 'postrender',\n\n  /**\n   * Triggered when the map starts moving.\n   * @event module:ol/MapEvent~MapEvent#movestart\n   * @api\n   */\n  MOVESTART: 'movestart',\n\n  /**\n   * Triggered after the map is moved.\n   * @event module:ol/MapEvent~MapEvent#moveend\n   * @api\n   */\n  MOVEEND: 'moveend',\n\n  /**\n   * Triggered when loading of additional map data (tiles, images, features) starts.\n   * @event module:ol/MapEvent~MapEvent#loadstart\n   * @api\n   */\n  LOADSTART: 'loadstart',\n\n  /**\n   * Triggered when loading of additional map data has completed.\n   * @event module:ol/MapEvent~MapEvent#loadend\n   * @api\n   */\n  LOADEND: 'loadend',\n};\n\n/***\n * @typedef {'postrender'|'movestart'|'moveend'|'loadstart'|'loadend'} Types\n */\n","/**\n * @module ol/MapProperty\n */\n\n/**\n * @enum {string}\n */\nexport default {\n  LAYERGROUP: 'layergroup',\n  SIZE: 'size',\n  TARGET: 'target',\n  VIEW: 'view',\n};\n","/**\n * @module ol/structs/PriorityQueue\n */\nimport {assert} from '../asserts.js';\nimport {clear} from '../obj.js';\n\n/**\n * @type {number}\n */\nexport const DROP = Infinity;\n\n/**\n * @classdesc\n * Priority queue.\n *\n * The implementation is inspired from the Closure Library's Heap class and\n * Python's heapq module.\n *\n * See https://github.com/google/closure-library/blob/master/closure/goog/structs/heap.js\n * and https://hg.python.org/cpython/file/2.7/Lib/heapq.py.\n *\n * @template T\n */\nclass PriorityQueue {\n  /**\n   * @param {function(T): number} priorityFunction Priority function.\n   * @param {function(T): string} keyFunction Key function.\n   */\n  constructor(priorityFunction, keyFunction) {\n    /**\n     * @type {function(T): number}\n     * @private\n     */\n    this.priorityFunction_ = priorityFunction;\n\n    /**\n     * @type {function(T): string}\n     * @private\n     */\n    this.keyFunction_ = keyFunction;\n\n    /**\n     * @type {Array<T>}\n     * @private\n     */\n    this.elements_ = [];\n\n    /**\n     * @type {Array<number>}\n     * @private\n     */\n    this.priorities_ = [];\n\n    /**\n     * @type {!Object<string, boolean>}\n     * @private\n     */\n    this.queuedElements_ = {};\n  }\n\n  /**\n   * FIXME empty description for jsdoc\n   */\n  clear() {\n    this.elements_.length = 0;\n    this.priorities_.length = 0;\n    clear(this.queuedElements_);\n  }\n\n  /**\n   * Remove and return the highest-priority element. O(log N).\n   * @return {T} Element.\n   */\n  dequeue() {\n    const elements = this.elements_;\n    const priorities = this.priorities_;\n    const element = elements[0];\n    if (elements.length == 1) {\n      elements.length = 0;\n      priorities.length = 0;\n    } else {\n      elements[0] = elements.pop();\n      priorities[0] = priorities.pop();\n      this.siftUp_(0);\n    }\n    const elementKey = this.keyFunction_(element);\n    delete this.queuedElements_[elementKey];\n    return element;\n  }\n\n  /**\n   * Enqueue an element. O(log N).\n   * @param {T} element Element.\n   * @return {boolean} The element was added to the queue.\n   */\n  enqueue(element) {\n    assert(!(this.keyFunction_(element) in this.queuedElements_), 31); // Tried to enqueue an `element` that was already added to the queue\n    const priority = this.priorityFunction_(element);\n    if (priority != DROP) {\n      this.elements_.push(element);\n      this.priorities_.push(priority);\n      this.queuedElements_[this.keyFunction_(element)] = true;\n      this.siftDown_(0, this.elements_.length - 1);\n      return true;\n    }\n    return false;\n  }\n\n  /**\n   * @return {number} Count.\n   */\n  getCount() {\n    return this.elements_.length;\n  }\n\n  /**\n   * Gets the index of the left child of the node at the given index.\n   * @param {number} index The index of the node to get the left child for.\n   * @return {number} The index of the left child.\n   * @private\n   */\n  getLeftChildIndex_(index) {\n    return index * 2 + 1;\n  }\n\n  /**\n   * Gets the index of the right child of the node at the given index.\n   * @param {number} index The index of the node to get the right child for.\n   * @return {number} The index of the right child.\n   * @private\n   */\n  getRightChildIndex_(index) {\n    return index * 2 + 2;\n  }\n\n  /**\n   * Gets the index of the parent of the node at the given index.\n   * @param {number} index The index of the node to get the parent for.\n   * @return {number} The index of the parent.\n   * @private\n   */\n  getParentIndex_(index) {\n    return (index - 1) >> 1;\n  }\n\n  /**\n   * Make this a heap. O(N).\n   * @private\n   */\n  heapify_() {\n    let i;\n    for (i = (this.elements_.length >> 1) - 1; i >= 0; i--) {\n      this.siftUp_(i);\n    }\n  }\n\n  /**\n   * @return {boolean} Is empty.\n   */\n  isEmpty() {\n    return this.elements_.length === 0;\n  }\n\n  /**\n   * @param {string} key Key.\n   * @return {boolean} Is key queued.\n   */\n  isKeyQueued(key) {\n    return key in this.queuedElements_;\n  }\n\n  /**\n   * @param {T} element Element.\n   * @return {boolean} Is queued.\n   */\n  isQueued(element) {\n    return this.isKeyQueued(this.keyFunction_(element));\n  }\n\n  /**\n   * @param {number} index The index of the node to move down.\n   * @private\n   */\n  siftUp_(index) {\n    const elements = this.elements_;\n    const priorities = this.priorities_;\n    const count = elements.length;\n    const element = elements[index];\n    const priority = priorities[index];\n    const startIndex = index;\n\n    while (index < count >> 1) {\n      const lIndex = this.getLeftChildIndex_(index);\n      const rIndex = this.getRightChildIndex_(index);\n\n      const smallerChildIndex =\n        rIndex < count && priorities[rIndex] < priorities[lIndex]\n          ? rIndex\n          : lIndex;\n\n      elements[index] = elements[smallerChildIndex];\n      priorities[index] = priorities[smallerChildIndex];\n      index = smallerChildIndex;\n    }\n\n    elements[index] = element;\n    priorities[index] = priority;\n    this.siftDown_(startIndex, index);\n  }\n\n  /**\n   * @param {number} startIndex The index of the root.\n   * @param {number} index The index of the node to move up.\n   * @private\n   */\n  siftDown_(startIndex, index) {\n    const elements = this.elements_;\n    const priorities = this.priorities_;\n    const element = elements[index];\n    const priority = priorities[index];\n\n    while (index > startIndex) {\n      const parentIndex = this.getParentIndex_(index);\n      if (priorities[parentIndex] > priority) {\n        elements[index] = elements[parentIndex];\n        priorities[index] = priorities[parentIndex];\n        index = parentIndex;\n      } else {\n        break;\n      }\n    }\n    elements[index] = element;\n    priorities[index] = priority;\n  }\n\n  /**\n   * FIXME empty description for jsdoc\n   */\n  reprioritize() {\n    const priorityFunction = this.priorityFunction_;\n    const elements = this.elements_;\n    const priorities = this.priorities_;\n    let index = 0;\n    const n = elements.length;\n    let element, i, priority;\n    for (i = 0; i < n; ++i) {\n      element = elements[i];\n      priority = priorityFunction(element);\n      if (priority == DROP) {\n        delete this.queuedElements_[this.keyFunction_(element)];\n      } else {\n        priorities[index] = priority;\n        elements[index++] = element;\n      }\n    }\n    elements.length = index;\n    priorities.length = index;\n    this.heapify_();\n  }\n}\n\nexport default PriorityQueue;\n","/**\n * @module ol/TileQueue\n */\nimport EventType from './events/EventType.js';\nimport PriorityQueue, {DROP} from './structs/PriorityQueue.js';\nimport TileState from './TileState.js';\n\n/**\n * @typedef {function(import(\"./Tile.js\").default, string, import(\"./coordinate.js\").Coordinate, number): number} PriorityFunction\n */\n\nclass TileQueue extends PriorityQueue {\n  /**\n   * @param {PriorityFunction} tilePriorityFunction Tile priority function.\n   * @param {function(): ?} tileChangeCallback Function called on each tile change event.\n   */\n  constructor(tilePriorityFunction, tileChangeCallback) {\n    super(\n      /**\n       * @param {Array} element Element.\n       * @return {number} Priority.\n       */\n      function (element) {\n        return tilePriorityFunction.apply(null, element);\n      },\n      /**\n       * @param {Array} element Element.\n       * @return {string} Key.\n       */\n      function (element) {\n        return /** @type {import(\"./Tile.js\").default} */ (element[0]).getKey();\n      }\n    );\n\n    /** @private */\n    this.boundHandleTileChange_ = this.handleTileChange.bind(this);\n\n    /**\n     * @private\n     * @type {function(): ?}\n     */\n    this.tileChangeCallback_ = tileChangeCallback;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.tilesLoading_ = 0;\n\n    /**\n     * @private\n     * @type {!Object<string,boolean>}\n     */\n    this.tilesLoadingKeys_ = {};\n  }\n\n  /**\n   * @param {Array} element Element.\n   * @return {boolean} The element was added to the queue.\n   */\n  enqueue(element) {\n    const added = super.enqueue(element);\n    if (added) {\n      const tile = element[0];\n      tile.addEventListener(EventType.CHANGE, this.boundHandleTileChange_);\n    }\n    return added;\n  }\n\n  /**\n   * @return {number} Number of tiles loading.\n   */\n  getTilesLoading() {\n    return this.tilesLoading_;\n  }\n\n  /**\n   * @param {import(\"./events/Event.js\").default} event Event.\n   * @protected\n   */\n  handleTileChange(event) {\n    const tile = /** @type {import(\"./Tile.js\").default} */ (event.target);\n    const state = tile.getState();\n    if (\n      state === TileState.LOADED ||\n      state === TileState.ERROR ||\n      state === TileState.EMPTY\n    ) {\n      if (state !== TileState.ERROR) {\n        tile.removeEventListener(EventType.CHANGE, this.boundHandleTileChange_);\n      }\n      const tileKey = tile.getKey();\n      if (tileKey in this.tilesLoadingKeys_) {\n        delete this.tilesLoadingKeys_[tileKey];\n        --this.tilesLoading_;\n      }\n      this.tileChangeCallback_();\n    }\n  }\n\n  /**\n   * @param {number} maxTotalLoading Maximum number tiles to load simultaneously.\n   * @param {number} maxNewLoads Maximum number of new tiles to load.\n   */\n  loadMoreTiles(maxTotalLoading, maxNewLoads) {\n    let newLoads = 0;\n    let state, tile, tileKey;\n    while (\n      this.tilesLoading_ < maxTotalLoading &&\n      newLoads < maxNewLoads &&\n      this.getCount() > 0\n    ) {\n      tile = /** @type {import(\"./Tile.js\").default} */ (this.dequeue()[0]);\n      tileKey = tile.getKey();\n      state = tile.getState();\n      if (state === TileState.IDLE && !(tileKey in this.tilesLoadingKeys_)) {\n        this.tilesLoadingKeys_[tileKey] = true;\n        ++this.tilesLoading_;\n        ++newLoads;\n        tile.load();\n      }\n    }\n  }\n}\n\nexport default TileQueue;\n\n/**\n * @param {import('./Map.js').FrameState} frameState Frame state.\n * @param {import(\"./Tile.js\").default} tile Tile.\n * @param {string} tileSourceKey Tile source key.\n * @param {import(\"./coordinate.js\").Coordinate} tileCenter Tile center.\n * @param {number} tileResolution Tile resolution.\n * @return {number} Tile priority.\n */\nexport function getTilePriority(\n  frameState,\n  tile,\n  tileSourceKey,\n  tileCenter,\n  tileResolution\n) {\n  // Filter out tiles at higher zoom levels than the current zoom level, or that\n  // are outside the visible extent.\n  if (!frameState || !(tileSourceKey in frameState.wantedTiles)) {\n    return DROP;\n  }\n  if (!frameState.wantedTiles[tileSourceKey][tile.getKey()]) {\n    return DROP;\n  }\n  // Prioritize the highest zoom level tiles closest to the focus.\n  // Tiles at higher zoom levels are prioritized using Math.log(tileResolution).\n  // Within a zoom level, tiles are prioritized by the distance in pixels between\n  // the center of the tile and the center of the viewport.  The factor of 65536\n  // means that the prioritization should behave as desired for tiles up to\n  // 65536 * Math.log(2) = 45426 pixels from the focus.\n  const center = frameState.viewState.center;\n  const deltaX = tileCenter[0] - center[0];\n  const deltaY = tileCenter[1] - center[1];\n  return (\n    65536 * Math.log(tileResolution) +\n    Math.sqrt(deltaX * deltaX + deltaY * deltaY) / tileResolution\n  );\n}\n","/**\n * @module ol/control/Control\n */\nimport BaseObject from '../Object.js';\nimport MapEventType from '../MapEventType.js';\nimport {VOID} from '../functions.js';\nimport {listen, unlistenByKey} from '../events.js';\nimport {removeNode} from '../dom.js';\n\n/**\n * @typedef {Object} Options\n * @property {HTMLElement} [element] The element is the control's\n * container element. This only needs to be specified if you're developing\n * a custom control.\n * @property {function(import(\"../MapEvent.js\").default):void} [render] Function called when\n * the control should be re-rendered. This is called in a `requestAnimationFrame`\n * callback.\n * @property {HTMLElement|string} [target] Specify a target if you want\n * the control to be rendered outside of the map's viewport.\n */\n\n/**\n * @classdesc\n * A control is a visible widget with a DOM element in a fixed position on the\n * screen. They can involve user input (buttons), or be informational only;\n * the position is determined using CSS. By default these are placed in the\n * container with CSS class name `ol-overlaycontainer-stopevent`, but can use\n * any outside DOM element.\n *\n * This is the base class for controls. You can use it for simple custom\n * controls by creating the element with listeners, creating an instance:\n * ```js\n * const myControl = new Control({element: myElement});\n * ```\n * and then adding this to the map.\n *\n * The main advantage of having this as a control rather than a simple separate\n * DOM element is that preventing propagation is handled for you. Controls\n * will also be objects in a {@link module:ol/Collection~Collection}, so you can use their methods.\n *\n * You can also extend this base for your own control class. See\n * examples/custom-controls for an example of how to do this.\n *\n * @api\n */\nclass Control extends BaseObject {\n  /**\n   * @param {Options} options Control options.\n   */\n  constructor(options) {\n    super();\n\n    const element = options.element;\n    if (element && !options.target && !element.style.pointerEvents) {\n      element.style.pointerEvents = 'auto';\n    }\n\n    /**\n     * @protected\n     * @type {HTMLElement}\n     */\n    this.element = element ? element : null;\n\n    /**\n     * @private\n     * @type {HTMLElement}\n     */\n    this.target_ = null;\n\n    /**\n     * @private\n     * @type {import(\"../Map.js\").default|null}\n     */\n    this.map_ = null;\n\n    /**\n     * @protected\n     * @type {!Array<import(\"../events.js\").EventsKey>}\n     */\n    this.listenerKeys = [];\n\n    if (options.render) {\n      this.render = options.render;\n    }\n\n    if (options.target) {\n      this.setTarget(options.target);\n    }\n  }\n\n  /**\n   * Clean up.\n   */\n  disposeInternal() {\n    removeNode(this.element);\n    super.disposeInternal();\n  }\n\n  /**\n   * Get the map associated with this control.\n   * @return {import(\"../Map.js\").default|null} Map.\n   * @api\n   */\n  getMap() {\n    return this.map_;\n  }\n\n  /**\n   * Remove the control from its current map and attach it to the new map.\n   * Pass `null` to just remove the control from the current map.\n   * Subclasses may set up event handlers to get notified about changes to\n   * the map here.\n   * @param {import(\"../Map.js\").default|null} map Map.\n   * @api\n   */\n  setMap(map) {\n    if (this.map_) {\n      removeNode(this.element);\n    }\n    for (let i = 0, ii = this.listenerKeys.length; i < ii; ++i) {\n      unlistenByKey(this.listenerKeys[i]);\n    }\n    this.listenerKeys.length = 0;\n    this.map_ = map;\n    if (map) {\n      const target = this.target_\n        ? this.target_\n        : map.getOverlayContainerStopEvent();\n      target.appendChild(this.element);\n      if (this.render !== VOID) {\n        this.listenerKeys.push(\n          listen(map, MapEventType.POSTRENDER, this.render, this)\n        );\n      }\n      map.render();\n    }\n  }\n\n  /**\n   * Renders the control.\n   * @param {import(\"../MapEvent.js\").default} mapEvent Map event.\n   * @api\n   */\n  render(mapEvent) {}\n\n  /**\n   * This function is used to set a target element for the control. It has no\n   * effect if it is called after the control has been added to the map (i.e.\n   * after `setMap` is called on the control). If no `target` is set in the\n   * options passed to the control constructor and if `setTarget` is not called\n   * then the control is added to the map's overlay container.\n   * @param {HTMLElement|string} target Target.\n   * @api\n   */\n  setTarget(target) {\n    this.target_ =\n      typeof target === 'string' ? document.getElementById(target) : target;\n  }\n}\n\nexport default Control;\n","/**\n * @module ol/control/Attribution\n */\nimport Control from './Control.js';\nimport EventType from '../events/EventType.js';\nimport {CLASS_COLLAPSED, CLASS_CONTROL, CLASS_UNSELECTABLE} from '../css.js';\nimport {equals} from '../array.js';\nimport {removeChildren, replaceNode} from '../dom.js';\n\n/**\n * @typedef {Object} Options\n * @property {string} [className='ol-attribution'] CSS class name.\n * @property {HTMLElement|string} [target] Specify a target if you\n * want the control to be rendered outside of the map's\n * viewport.\n * @property {boolean} [collapsible] Specify if attributions can\n * be collapsed. If not specified, sources control this behavior with their\n * `attributionsCollapsible` setting.\n * @property {boolean} [collapsed=true] Specify if attributions should\n * be collapsed at startup.\n * @property {string} [tipLabel='Attributions'] Text label to use for the button tip.\n * @property {string|HTMLElement} [label='i'] Text label to use for the\n * collapsed attributions button.\n * Instead of text, also an element (e.g. a `span` element) can be used.\n * @property {string} [expandClassName=className + '-expand'] CSS class name for the\n * collapsed attributions button.\n * @property {string|HTMLElement} [collapseLabel='›'] Text label to use\n * for the expanded attributions button.\n * Instead of text, also an element (e.g. a `span` element) can be used.\n * @property {string} [collapseClassName=className + '-collapse'] CSS class name for the\n * expanded attributions button.\n * @property {function(import(\"../MapEvent.js\").default):void} [render] Function called when\n * the control should be re-rendered. This is called in a `requestAnimationFrame`\n * callback.\n */\n\n/**\n * @classdesc\n * Control to show all the attributions associated with the layer sources\n * in the map. This control is one of the default controls included in maps.\n * By default it will show in the bottom right portion of the map, but this can\n * be changed by using a css selector for `.ol-attribution`.\n *\n * @api\n */\nclass Attribution extends Control {\n  /**\n   * @param {Options} [options] Attribution options.\n   */\n  constructor(options) {\n    options = options ? options : {};\n\n    super({\n      element: document.createElement('div'),\n      render: options.render,\n      target: options.target,\n    });\n\n    /**\n     * @private\n     * @type {HTMLElement}\n     */\n    this.ulElement_ = document.createElement('ul');\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.collapsed_ =\n      options.collapsed !== undefined ? options.collapsed : true;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.userCollapsed_ = this.collapsed_;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.overrideCollapsible_ = options.collapsible !== undefined;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.collapsible_ =\n      options.collapsible !== undefined ? options.collapsible : true;\n\n    if (!this.collapsible_) {\n      this.collapsed_ = false;\n    }\n\n    const className =\n      options.className !== undefined ? options.className : 'ol-attribution';\n\n    const tipLabel =\n      options.tipLabel !== undefined ? options.tipLabel : 'Attributions';\n\n    const expandClassName =\n      options.expandClassName !== undefined\n        ? options.expandClassName\n        : className + '-expand';\n\n    const collapseLabel =\n      options.collapseLabel !== undefined ? options.collapseLabel : '\\u203A';\n\n    const collapseClassName =\n      options.collapseClassName !== undefined\n        ? options.collapseClassName\n        : className + '-collapse';\n\n    if (typeof collapseLabel === 'string') {\n      /**\n       * @private\n       * @type {HTMLElement}\n       */\n      this.collapseLabel_ = document.createElement('span');\n      this.collapseLabel_.textContent = collapseLabel;\n      this.collapseLabel_.className = collapseClassName;\n    } else {\n      this.collapseLabel_ = collapseLabel;\n    }\n\n    const label = options.label !== undefined ? options.label : 'i';\n\n    if (typeof label === 'string') {\n      /**\n       * @private\n       * @type {HTMLElement}\n       */\n      this.label_ = document.createElement('span');\n      this.label_.textContent = label;\n      this.label_.className = expandClassName;\n    } else {\n      this.label_ = label;\n    }\n\n    const activeLabel =\n      this.collapsible_ && !this.collapsed_ ? this.collapseLabel_ : this.label_;\n\n    /**\n     * @private\n     * @type {HTMLElement}\n     */\n    this.toggleButton_ = document.createElement('button');\n    this.toggleButton_.setAttribute('type', 'button');\n    this.toggleButton_.setAttribute('aria-expanded', String(!this.collapsed_));\n    this.toggleButton_.title = tipLabel;\n    this.toggleButton_.appendChild(activeLabel);\n\n    this.toggleButton_.addEventListener(\n      EventType.CLICK,\n      this.handleClick_.bind(this),\n      false\n    );\n\n    const cssClasses =\n      className +\n      ' ' +\n      CLASS_UNSELECTABLE +\n      ' ' +\n      CLASS_CONTROL +\n      (this.collapsed_ && this.collapsible_ ? ' ' + CLASS_COLLAPSED : '') +\n      (this.collapsible_ ? '' : ' ol-uncollapsible');\n    const element = this.element;\n    element.className = cssClasses;\n    element.appendChild(this.toggleButton_);\n    element.appendChild(this.ulElement_);\n\n    /**\n     * A list of currently rendered resolutions.\n     * @type {Array<string>}\n     * @private\n     */\n    this.renderedAttributions_ = [];\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.renderedVisible_ = true;\n  }\n\n  /**\n   * Collect a list of visible attributions and set the collapsible state.\n   * @param {import(\"../Map.js\").FrameState} frameState Frame state.\n   * @return {Array<string>} Attributions.\n   * @private\n   */\n  collectSourceAttributions_(frameState) {\n    const visibleAttributions = Array.from(\n      new Set(\n        this.getMap()\n          .getAllLayers()\n          .flatMap((layer) => layer.getAttributions(frameState))\n      )\n    );\n\n    const collapsible = !this.getMap()\n      .getAllLayers()\n      .some(\n        (layer) =>\n          layer.getSource() &&\n          layer.getSource().getAttributionsCollapsible() === false\n      );\n    if (!this.overrideCollapsible_) {\n      this.setCollapsible(collapsible);\n    }\n    return visibleAttributions;\n  }\n\n  /**\n   * @private\n   * @param {?import(\"../Map.js\").FrameState} frameState Frame state.\n   */\n  updateElement_(frameState) {\n    if (!frameState) {\n      if (this.renderedVisible_) {\n        this.element.style.display = 'none';\n        this.renderedVisible_ = false;\n      }\n      return;\n    }\n\n    const attributions = this.collectSourceAttributions_(frameState);\n\n    const visible = attributions.length > 0;\n    if (this.renderedVisible_ != visible) {\n      this.element.style.display = visible ? '' : 'none';\n      this.renderedVisible_ = visible;\n    }\n\n    if (equals(attributions, this.renderedAttributions_)) {\n      return;\n    }\n\n    removeChildren(this.ulElement_);\n\n    // append the attributions\n    for (let i = 0, ii = attributions.length; i < ii; ++i) {\n      const element = document.createElement('li');\n      element.innerHTML = attributions[i];\n      this.ulElement_.appendChild(element);\n    }\n\n    this.renderedAttributions_ = attributions;\n  }\n\n  /**\n   * @param {MouseEvent} event The event to handle\n   * @private\n   */\n  handleClick_(event) {\n    event.preventDefault();\n    this.handleToggle_();\n    this.userCollapsed_ = this.collapsed_;\n  }\n\n  /**\n   * @private\n   */\n  handleToggle_() {\n    this.element.classList.toggle(CLASS_COLLAPSED);\n    if (this.collapsed_) {\n      replaceNode(this.collapseLabel_, this.label_);\n    } else {\n      replaceNode(this.label_, this.collapseLabel_);\n    }\n    this.collapsed_ = !this.collapsed_;\n    this.toggleButton_.setAttribute('aria-expanded', String(!this.collapsed_));\n  }\n\n  /**\n   * Return `true` if the attribution is collapsible, `false` otherwise.\n   * @return {boolean} True if the widget is collapsible.\n   * @api\n   */\n  getCollapsible() {\n    return this.collapsible_;\n  }\n\n  /**\n   * Set whether the attribution should be collapsible.\n   * @param {boolean} collapsible True if the widget is collapsible.\n   * @api\n   */\n  setCollapsible(collapsible) {\n    if (this.collapsible_ === collapsible) {\n      return;\n    }\n    this.collapsible_ = collapsible;\n    this.element.classList.toggle('ol-uncollapsible');\n    if (this.userCollapsed_) {\n      this.handleToggle_();\n    }\n  }\n\n  /**\n   * Collapse or expand the attribution according to the passed parameter. Will\n   * not do anything if the attribution isn't collapsible or if the current\n   * collapsed state is already the one requested.\n   * @param {boolean} collapsed True if the widget is collapsed.\n   * @api\n   */\n  setCollapsed(collapsed) {\n    this.userCollapsed_ = collapsed;\n    if (!this.collapsible_ || this.collapsed_ === collapsed) {\n      return;\n    }\n    this.handleToggle_();\n  }\n\n  /**\n   * Return `true` when the attribution is currently collapsed or `false`\n   * otherwise.\n   * @return {boolean} True if the widget is collapsed.\n   * @api\n   */\n  getCollapsed() {\n    return this.collapsed_;\n  }\n\n  /**\n   * Update the attribution element.\n   * @param {import(\"../MapEvent.js\").default} mapEvent Map event.\n   * @override\n   */\n  render(mapEvent) {\n    this.updateElement_(mapEvent.frameState);\n  }\n}\n\nexport default Attribution;\n","/**\n * @module ol/control/Rotate\n */\nimport Control from './Control.js';\nimport EventType from '../events/EventType.js';\nimport {CLASS_CONTROL, CLASS_HIDDEN, CLASS_UNSELECTABLE} from '../css.js';\nimport {easeOut} from '../easing.js';\n\n/**\n * @typedef {Object} Options\n * @property {string} [className='ol-rotate'] CSS class name.\n * @property {string|HTMLElement} [label='⇧'] Text label to use for the rotate button.\n * Instead of text, also an element (e.g. a `span` element) can be used.\n * @property {string} [tipLabel='Reset rotation'] Text label to use for the rotate tip.\n * @property {string} [compassClassName='ol-compass'] CSS class name for the compass.\n * @property {number} [duration=250] Animation duration in milliseconds.\n * @property {boolean} [autoHide=true] Hide the control when rotation is 0.\n * @property {function(import(\"../MapEvent.js\").default):void} [render] Function called when the control should\n * be re-rendered. This is called in a `requestAnimationFrame` callback.\n * @property {function():void} [resetNorth] Function called when the control is clicked.\n * This will override the default `resetNorth`.\n * @property {HTMLElement|string} [target] Specify a target if you want the control to be\n * rendered outside of the map's viewport.\n */\n\n/**\n * @classdesc\n * A button control to reset rotation to 0.\n * To style this control use css selector `.ol-rotate`. A `.ol-hidden` css\n * selector is added to the button when the rotation is 0.\n *\n * @api\n */\nclass Rotate extends Control {\n  /**\n   * @param {Options} [options] Rotate options.\n   */\n  constructor(options) {\n    options = options ? options : {};\n\n    super({\n      element: document.createElement('div'),\n      render: options.render,\n      target: options.target,\n    });\n\n    const className =\n      options.className !== undefined ? options.className : 'ol-rotate';\n\n    const label = options.label !== undefined ? options.label : '\\u21E7';\n\n    const compassClassName =\n      options.compassClassName !== undefined\n        ? options.compassClassName\n        : 'ol-compass';\n\n    /**\n     * @type {HTMLElement}\n     * @private\n     */\n    this.label_ = null;\n\n    if (typeof label === 'string') {\n      this.label_ = document.createElement('span');\n      this.label_.className = compassClassName;\n      this.label_.textContent = label;\n    } else {\n      this.label_ = label;\n      this.label_.classList.add(compassClassName);\n    }\n\n    const tipLabel = options.tipLabel ? options.tipLabel : 'Reset rotation';\n\n    const button = document.createElement('button');\n    button.className = className + '-reset';\n    button.setAttribute('type', 'button');\n    button.title = tipLabel;\n    button.appendChild(this.label_);\n\n    button.addEventListener(\n      EventType.CLICK,\n      this.handleClick_.bind(this),\n      false\n    );\n\n    const cssClasses =\n      className + ' ' + CLASS_UNSELECTABLE + ' ' + CLASS_CONTROL;\n    const element = this.element;\n    element.className = cssClasses;\n    element.appendChild(button);\n\n    this.callResetNorth_ = options.resetNorth ? options.resetNorth : undefined;\n\n    /**\n     * @type {number}\n     * @private\n     */\n    this.duration_ = options.duration !== undefined ? options.duration : 250;\n\n    /**\n     * @type {boolean}\n     * @private\n     */\n    this.autoHide_ = options.autoHide !== undefined ? options.autoHide : true;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.rotation_ = undefined;\n\n    if (this.autoHide_) {\n      this.element.classList.add(CLASS_HIDDEN);\n    }\n  }\n\n  /**\n   * @param {MouseEvent} event The event to handle\n   * @private\n   */\n  handleClick_(event) {\n    event.preventDefault();\n    if (this.callResetNorth_ !== undefined) {\n      this.callResetNorth_();\n    } else {\n      this.resetNorth_();\n    }\n  }\n\n  /**\n   * @private\n   */\n  resetNorth_() {\n    const map = this.getMap();\n    const view = map.getView();\n    if (!view) {\n      // the map does not have a view, so we can't act\n      // upon it\n      return;\n    }\n    const rotation = view.getRotation();\n    if (rotation !== undefined) {\n      if (this.duration_ > 0 && rotation % (2 * Math.PI) !== 0) {\n        view.animate({\n          rotation: 0,\n          duration: this.duration_,\n          easing: easeOut,\n        });\n      } else {\n        view.setRotation(0);\n      }\n    }\n  }\n\n  /**\n   * Update the rotate control element.\n   * @param {import(\"../MapEvent.js\").default} mapEvent Map event.\n   * @override\n   */\n  render(mapEvent) {\n    const frameState = mapEvent.frameState;\n    if (!frameState) {\n      return;\n    }\n    const rotation = frameState.viewState.rotation;\n    if (rotation != this.rotation_) {\n      const transform = 'rotate(' + rotation + 'rad)';\n      if (this.autoHide_) {\n        const contains = this.element.classList.contains(CLASS_HIDDEN);\n        if (!contains && rotation === 0) {\n          this.element.classList.add(CLASS_HIDDEN);\n        } else if (contains && rotation !== 0) {\n          this.element.classList.remove(CLASS_HIDDEN);\n        }\n      }\n      this.label_.style.transform = transform;\n    }\n    this.rotation_ = rotation;\n  }\n}\n\nexport default Rotate;\n","/**\n * @module ol/control/Zoom\n */\nimport Control from './Control.js';\nimport EventType from '../events/EventType.js';\nimport {CLASS_CONTROL, CLASS_UNSELECTABLE} from '../css.js';\nimport {easeOut} from '../easing.js';\n\n/**\n * @typedef {Object} Options\n * @property {number} [duration=250] Animation duration in milliseconds.\n * @property {string} [className='ol-zoom'] CSS class name.\n * @property {string} [zoomInClassName=className + '-in'] CSS class name for the zoom-in button.\n * @property {string} [zoomOutClassName=className + '-out'] CSS class name for the zoom-out button.\n * @property {string|HTMLElement} [zoomInLabel='+'] Text label to use for the zoom-in\n * button. Instead of text, also an element (e.g. a `span` element) can be used.\n * @property {string|HTMLElement} [zoomOutLabel='–'] Text label to use for the zoom-out button.\n * Instead of text, also an element (e.g. a `span` element) can be used.\n * @property {string} [zoomInTipLabel='Zoom in'] Text label to use for the button tip.\n * @property {string} [zoomOutTipLabel='Zoom out'] Text label to use for the button tip.\n * @property {number} [delta=1] The zoom delta applied on each click.\n * @property {HTMLElement|string} [target] Specify a target if you want the control to be\n * rendered outside of the map's viewport.\n */\n\n/**\n * @classdesc\n * A control with 2 buttons, one for zoom in and one for zoom out.\n * This control is one of the default controls of a map. To style this control\n * use css selectors `.ol-zoom-in` and `.ol-zoom-out`.\n *\n * @api\n */\nclass Zoom extends Control {\n  /**\n   * @param {Options} [options] Zoom options.\n   */\n  constructor(options) {\n    options = options ? options : {};\n\n    super({\n      element: document.createElement('div'),\n      target: options.target,\n    });\n\n    const className =\n      options.className !== undefined ? options.className : 'ol-zoom';\n\n    const delta = options.delta !== undefined ? options.delta : 1;\n\n    const zoomInClassName =\n      options.zoomInClassName !== undefined\n        ? options.zoomInClassName\n        : className + '-in';\n\n    const zoomOutClassName =\n      options.zoomOutClassName !== undefined\n        ? options.zoomOutClassName\n        : className + '-out';\n\n    const zoomInLabel =\n      options.zoomInLabel !== undefined ? options.zoomInLabel : '+';\n    const zoomOutLabel =\n      options.zoomOutLabel !== undefined ? options.zoomOutLabel : '\\u2013';\n\n    const zoomInTipLabel =\n      options.zoomInTipLabel !== undefined ? options.zoomInTipLabel : 'Zoom in';\n    const zoomOutTipLabel =\n      options.zoomOutTipLabel !== undefined\n        ? options.zoomOutTipLabel\n        : 'Zoom out';\n\n    const inElement = document.createElement('button');\n    inElement.className = zoomInClassName;\n    inElement.setAttribute('type', 'button');\n    inElement.title = zoomInTipLabel;\n    inElement.appendChild(\n      typeof zoomInLabel === 'string'\n        ? document.createTextNode(zoomInLabel)\n        : zoomInLabel\n    );\n\n    inElement.addEventListener(\n      EventType.CLICK,\n      this.handleClick_.bind(this, delta),\n      false\n    );\n\n    const outElement = document.createElement('button');\n    outElement.className = zoomOutClassName;\n    outElement.setAttribute('type', 'button');\n    outElement.title = zoomOutTipLabel;\n    outElement.appendChild(\n      typeof zoomOutLabel === 'string'\n        ? document.createTextNode(zoomOutLabel)\n        : zoomOutLabel\n    );\n\n    outElement.addEventListener(\n      EventType.CLICK,\n      this.handleClick_.bind(this, -delta),\n      false\n    );\n\n    const cssClasses =\n      className + ' ' + CLASS_UNSELECTABLE + ' ' + CLASS_CONTROL;\n    const element = this.element;\n    element.className = cssClasses;\n    element.appendChild(inElement);\n    element.appendChild(outElement);\n\n    /**\n     * @type {number}\n     * @private\n     */\n    this.duration_ = options.duration !== undefined ? options.duration : 250;\n  }\n\n  /**\n   * @param {number} delta Zoom delta.\n   * @param {MouseEvent} event The event to handle\n   * @private\n   */\n  handleClick_(delta, event) {\n    event.preventDefault();\n    this.zoomByDelta_(delta);\n  }\n\n  /**\n   * @param {number} delta Zoom delta.\n   * @private\n   */\n  zoomByDelta_(delta) {\n    const map = this.getMap();\n    const view = map.getView();\n    if (!view) {\n      // the map does not have a view, so we can't act\n      // upon it\n      return;\n    }\n    const currentZoom = view.getZoom();\n    if (currentZoom !== undefined) {\n      const newZoom = view.getConstrainedZoom(currentZoom + delta);\n      if (this.duration_ > 0) {\n        if (view.getAnimating()) {\n          view.cancelAnimations();\n        }\n        view.animate({\n          zoom: newZoom,\n          duration: this.duration_,\n          easing: easeOut,\n        });\n      } else {\n        view.setZoom(newZoom);\n      }\n    }\n  }\n}\n\nexport default Zoom;\n","/**\n * @module ol/control/defaults\n */\nimport Attribution from './Attribution.js';\nimport Collection from '../Collection.js';\nimport Rotate from './Rotate.js';\nimport Zoom from './Zoom.js';\n\n/**\n * @typedef {Object} DefaultsOptions\n * @property {boolean} [attribution=true] Include\n * {@link module:ol/control/Attribution~Attribution}.\n * @property {import(\"./Attribution.js\").Options} [attributionOptions]\n * Options for {@link module:ol/control/Attribution~Attribution}.\n * @property {boolean} [rotate=true] Include\n * {@link module:ol/control/Rotate~Rotate}.\n * @property {import(\"./Rotate.js\").Options} [rotateOptions] Options\n * for {@link module:ol/control/Rotate~Rotate}.\n * @property {boolean} [zoom] Include {@link module:ol/control/Zoom~Zoom}.\n * @property {import(\"./Zoom.js\").Options} [zoomOptions] Options for\n * {@link module:ol/control/Zoom~Zoom}.\n */\n\n/**\n * Set of controls included in maps by default. Unless configured otherwise,\n * this returns a collection containing an instance of each of the following\n * controls:\n * * {@link module:ol/control/Zoom~Zoom}\n * * {@link module:ol/control/Rotate~Rotate}\n * * {@link module:ol/control/Attribution~Attribution}\n *\n * @param {DefaultsOptions} [options] Options for the default controls.\n * @return {Collection<import(\"./Control.js\").default>} A collection of controls\n * to be used with the {@link module:ol/Map~Map} constructor's `controls` option.\n * @api\n */\nexport function defaults(options) {\n  options = options ? options : {};\n\n  /** @type {Collection<import(\"./Control.js\").default>} */\n  const controls = new Collection();\n\n  const zoomControl = options.zoom !== undefined ? options.zoom : true;\n  if (zoomControl) {\n    controls.push(new Zoom(options.zoomOptions));\n  }\n\n  const rotateControl = options.rotate !== undefined ? options.rotate : true;\n  if (rotateControl) {\n    controls.push(new Rotate(options.rotateOptions));\n  }\n\n  const attributionControl =\n    options.attribution !== undefined ? options.attribution : true;\n  if (attributionControl) {\n    controls.push(new Attribution(options.attributionOptions));\n  }\n\n  return controls;\n}\n","/**\n * @module ol/interaction/Property\n */\n\n/**\n * @enum {string}\n */\nexport default {\n  ACTIVE: 'active',\n};\n","/**\n * @module ol/interaction/Interaction\n */\nimport BaseObject from '../Object.js';\nimport InteractionProperty from './Property.js';\nimport {easeOut, linear} from '../easing.js';\n\n/***\n * @template Return\n * @typedef {import(\"../Observable\").OnSignature<import(\"../Observable\").EventTypes, import(\"../events/Event.js\").default, Return> &\n *   import(\"../Observable\").OnSignature<import(\"../ObjectEventType\").Types|\n *     'change:active', import(\"../Object\").ObjectEvent, Return> &\n *   import(\"../Observable\").CombinedOnSignature<import(\"../Observable\").EventTypes|import(\"../ObjectEventType\").Types|\n *     'change:active', Return>} InteractionOnSignature\n */\n\n/**\n * Object literal with config options for interactions.\n * @typedef {Object} InteractionOptions\n * @property {function(import(\"../MapBrowserEvent.js\").default):boolean} handleEvent\n * Method called by the map to notify the interaction that a browser event was\n * dispatched to the map. If the function returns a falsy value, propagation of\n * the event to other interactions in the map's interactions chain will be\n * prevented (this includes functions with no explicit return). The interactions\n * are traversed in reverse order of the interactions collection of the map.\n */\n\n/**\n * @classdesc\n * Abstract base class; normally only used for creating subclasses and not\n * instantiated in apps.\n * User actions that change the state of the map. Some are similar to controls,\n * but are not associated with a DOM element.\n * For example, {@link module:ol/interaction/KeyboardZoom~KeyboardZoom} is\n * functionally the same as {@link module:ol/control/Zoom~Zoom}, but triggered\n * by a keyboard event not a button element event.\n * Although interactions do not have a DOM element, some of them do render\n * vectors and so are visible on the screen.\n * @api\n */\nclass Interaction extends BaseObject {\n  /**\n   * @param {InteractionOptions} [options] Options.\n   */\n  constructor(options) {\n    super();\n\n    /***\n     * @type {InteractionOnSignature<import(\"../events\").EventsKey>}\n     */\n    this.on;\n\n    /***\n     * @type {InteractionOnSignature<import(\"../events\").EventsKey>}\n     */\n    this.once;\n\n    /***\n     * @type {InteractionOnSignature<void>}\n     */\n    this.un;\n\n    if (options && options.handleEvent) {\n      this.handleEvent = options.handleEvent;\n    }\n\n    /**\n     * @private\n     * @type {import(\"../Map.js\").default|null}\n     */\n    this.map_ = null;\n\n    this.setActive(true);\n  }\n\n  /**\n   * Return whether the interaction is currently active.\n   * @return {boolean} `true` if the interaction is active, `false` otherwise.\n   * @observable\n   * @api\n   */\n  getActive() {\n    return /** @type {boolean} */ (this.get(InteractionProperty.ACTIVE));\n  }\n\n  /**\n   * Get the map associated with this interaction.\n   * @return {import(\"../Map.js\").default|null} Map.\n   * @api\n   */\n  getMap() {\n    return this.map_;\n  }\n\n  /**\n   * Handles the {@link module:ol/MapBrowserEvent~MapBrowserEvent map browser event}.\n   * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n   * @return {boolean} `false` to stop event propagation.\n   * @api\n   */\n  handleEvent(mapBrowserEvent) {\n    return true;\n  }\n\n  /**\n   * Activate or deactivate the interaction.\n   * @param {boolean} active Active.\n   * @observable\n   * @api\n   */\n  setActive(active) {\n    this.set(InteractionProperty.ACTIVE, active);\n  }\n\n  /**\n   * Remove the interaction from its current map and attach it to the new map.\n   * Subclasses may set up event handlers to get notified about changes to\n   * the map here.\n   * @param {import(\"../Map.js\").default|null} map Map.\n   */\n  setMap(map) {\n    this.map_ = map;\n  }\n}\n\n/**\n * @param {import(\"../View.js\").default} view View.\n * @param {import(\"../coordinate.js\").Coordinate} delta Delta.\n * @param {number} [duration] Duration.\n */\nexport function pan(view, delta, duration) {\n  const currentCenter = view.getCenterInternal();\n  if (currentCenter) {\n    const center = [currentCenter[0] + delta[0], currentCenter[1] + delta[1]];\n    view.animateInternal({\n      duration: duration !== undefined ? duration : 250,\n      easing: linear,\n      center: view.getConstrainedCenter(center),\n    });\n  }\n}\n\n/**\n * @param {import(\"../View.js\").default} view View.\n * @param {number} delta Delta from previous zoom level.\n * @param {import(\"../coordinate.js\").Coordinate} [anchor] Anchor coordinate in the user projection.\n * @param {number} [duration] Duration.\n */\nexport function zoomByDelta(view, delta, anchor, duration) {\n  const currentZoom = view.getZoom();\n\n  if (currentZoom === undefined) {\n    return;\n  }\n\n  const newZoom = view.getConstrainedZoom(currentZoom + delta);\n  const newResolution = view.getResolutionForZoom(newZoom);\n\n  if (view.getAnimating()) {\n    view.cancelAnimations();\n  }\n  view.animate({\n    resolution: newResolution,\n    anchor: anchor,\n    duration: duration !== undefined ? duration : 250,\n    easing: easeOut,\n  });\n}\n\nexport default Interaction;\n","/**\n * @module ol/interaction/DoubleClickZoom\n */\nimport Interaction, {zoomByDelta} from './Interaction.js';\nimport MapBrowserEventType from '../MapBrowserEventType.js';\n\n/**\n * @typedef {Object} Options\n * @property {number} [duration=250] Animation duration in milliseconds.\n * @property {number} [delta=1] The zoom delta applied on each double click.\n */\n\n/**\n * @classdesc\n * Allows the user to zoom by double-clicking on the map.\n * @api\n */\nclass DoubleClickZoom extends Interaction {\n  /**\n   * @param {Options} [options] Options.\n   */\n  constructor(options) {\n    super();\n\n    options = options ? options : {};\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.delta_ = options.delta ? options.delta : 1;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.duration_ = options.duration !== undefined ? options.duration : 250;\n  }\n\n  /**\n   * Handles the {@link module:ol/MapBrowserEvent~MapBrowserEvent map browser event} (if it was a\n   * doubleclick) and eventually zooms the map.\n   * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n   * @return {boolean} `false` to stop event propagation.\n   */\n  handleEvent(mapBrowserEvent) {\n    let stopEvent = false;\n    if (mapBrowserEvent.type == MapBrowserEventType.DBLCLICK) {\n      const browserEvent = /** @type {MouseEvent} */ (\n        mapBrowserEvent.originalEvent\n      );\n      const map = mapBrowserEvent.map;\n      const anchor = mapBrowserEvent.coordinate;\n      const delta = browserEvent.shiftKey ? -this.delta_ : this.delta_;\n      const view = map.getView();\n      zoomByDelta(view, delta, anchor, this.duration_);\n      browserEvent.preventDefault();\n      stopEvent = true;\n    }\n    return !stopEvent;\n  }\n}\n\nexport default DoubleClickZoom;\n","/**\n * @module ol/interaction/Pointer\n */\nimport Interaction from './Interaction.js';\nimport MapBrowserEventType from '../MapBrowserEventType.js';\n\n/**\n * @typedef {Object} Options\n * @property {function(import(\"../MapBrowserEvent.js\").default):boolean} [handleDownEvent]\n * Function handling \"down\" events. If the function returns `true` then a drag\n * sequence is started.\n * @property {function(import(\"../MapBrowserEvent.js\").default):void} [handleDragEvent]\n * Function handling \"drag\" events. This function is called on \"move\" events\n * during a drag sequence.\n * @property {function(import(\"../MapBrowserEvent.js\").default):boolean} [handleEvent]\n * Method called by the map to notify the interaction that a browser event was\n * dispatched to the map. The function may return `false` to prevent the\n * propagation of the event to other interactions in the map's interactions\n * chain.\n * @property {function(import(\"../MapBrowserEvent.js\").default):void} [handleMoveEvent]\n * Function handling \"move\" events. This function is called on \"move\" events.\n * This functions is also called during a drag sequence, so during a drag\n * sequence both the `handleDragEvent` function and this function are called.\n * If `handleDownEvent` is defined and it returns true this function will not\n * be called during a drag sequence.\n * @property {function(import(\"../MapBrowserEvent.js\").default):boolean} [handleUpEvent]\n *  Function handling \"up\" events. If the function returns `false` then the\n * current drag sequence is stopped.\n * @property {function(boolean):boolean} [stopDown]\n * Should the down event be propagated to other interactions, or should be\n * stopped?\n */\n\n/**\n * @classdesc\n * Base class that calls user-defined functions on `down`, `move` and `up`\n * events. This class also manages \"drag sequences\".\n *\n * When the `handleDownEvent` user function returns `true` a drag sequence is\n * started. During a drag sequence the `handleDragEvent` user function is\n * called on `move` events. The drag sequence ends when the `handleUpEvent`\n * user function is called and returns `false`.\n * @api\n */\nclass PointerInteraction extends Interaction {\n  /**\n   * @param {Options} [options] Options.\n   */\n  constructor(options) {\n    options = options ? options : {};\n\n    super(\n      /** @type {import(\"./Interaction.js\").InteractionOptions} */ (options)\n    );\n\n    if (options.handleDownEvent) {\n      this.handleDownEvent = options.handleDownEvent;\n    }\n\n    if (options.handleDragEvent) {\n      this.handleDragEvent = options.handleDragEvent;\n    }\n\n    if (options.handleMoveEvent) {\n      this.handleMoveEvent = options.handleMoveEvent;\n    }\n\n    if (options.handleUpEvent) {\n      this.handleUpEvent = options.handleUpEvent;\n    }\n\n    if (options.stopDown) {\n      this.stopDown = options.stopDown;\n    }\n\n    /**\n     * @type {boolean}\n     * @protected\n     */\n    this.handlingDownUpSequence = false;\n\n    /**\n     * @type {Array<PointerEvent>}\n     * @protected\n     */\n    this.targetPointers = [];\n  }\n\n  /**\n   * Returns the current number of pointers involved in the interaction,\n   * e.g. `2` when two fingers are used.\n   * @return {number} The number of pointers.\n   * @api\n   */\n  getPointerCount() {\n    return this.targetPointers.length;\n  }\n\n  /**\n   * Handle pointer down events.\n   * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Event.\n   * @return {boolean} If the event was consumed.\n   * @protected\n   */\n  handleDownEvent(mapBrowserEvent) {\n    return false;\n  }\n\n  /**\n   * Handle pointer drag events.\n   * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Event.\n   * @protected\n   */\n  handleDragEvent(mapBrowserEvent) {}\n\n  /**\n   * Handles the {@link module:ol/MapBrowserEvent~MapBrowserEvent map browser event} and may call into\n   * other functions, if event sequences like e.g. 'drag' or 'down-up' etc. are\n   * detected.\n   * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n   * @return {boolean} `false` to stop event propagation.\n   * @api\n   */\n  handleEvent(mapBrowserEvent) {\n    if (!mapBrowserEvent.originalEvent) {\n      return true;\n    }\n\n    let stopEvent = false;\n    this.updateTrackedPointers_(mapBrowserEvent);\n    if (this.handlingDownUpSequence) {\n      if (mapBrowserEvent.type == MapBrowserEventType.POINTERDRAG) {\n        this.handleDragEvent(mapBrowserEvent);\n        // prevent page scrolling during dragging\n        mapBrowserEvent.originalEvent.preventDefault();\n      } else if (mapBrowserEvent.type == MapBrowserEventType.POINTERUP) {\n        const handledUp = this.handleUpEvent(mapBrowserEvent);\n        this.handlingDownUpSequence =\n          handledUp && this.targetPointers.length > 0;\n      }\n    } else {\n      if (mapBrowserEvent.type == MapBrowserEventType.POINTERDOWN) {\n        const handled = this.handleDownEvent(mapBrowserEvent);\n        this.handlingDownUpSequence = handled;\n        stopEvent = this.stopDown(handled);\n      } else if (mapBrowserEvent.type == MapBrowserEventType.POINTERMOVE) {\n        this.handleMoveEvent(mapBrowserEvent);\n      }\n    }\n    return !stopEvent;\n  }\n\n  /**\n   * Handle pointer move events.\n   * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Event.\n   * @protected\n   */\n  handleMoveEvent(mapBrowserEvent) {}\n\n  /**\n   * Handle pointer up events.\n   * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Event.\n   * @return {boolean} If the event was consumed.\n   * @protected\n   */\n  handleUpEvent(mapBrowserEvent) {\n    return false;\n  }\n\n  /**\n   * This function is used to determine if \"down\" events should be propagated\n   * to other interactions or should be stopped.\n   * @param {boolean} handled Was the event handled by the interaction?\n   * @return {boolean} Should the `down` event be stopped?\n   */\n  stopDown(handled) {\n    return handled;\n  }\n\n  /**\n   * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Event.\n   * @private\n   */\n  updateTrackedPointers_(mapBrowserEvent) {\n    if (mapBrowserEvent.activePointers) {\n      this.targetPointers = mapBrowserEvent.activePointers;\n    }\n  }\n}\n\n/**\n * @param {Array<PointerEvent>} pointerEvents List of events.\n * @return {{clientX: number, clientY: number}} Centroid pixel.\n */\nexport function centroid(pointerEvents) {\n  const length = pointerEvents.length;\n  let clientX = 0;\n  let clientY = 0;\n  for (let i = 0; i < length; i++) {\n    clientX += pointerEvents[i].clientX;\n    clientY += pointerEvents[i].clientY;\n  }\n  return {clientX: clientX / length, clientY: clientY / length};\n}\n\nexport default PointerInteraction;\n","/**\n * @module ol/events/condition\n */\nimport MapBrowserEventType from '../MapBrowserEventType.js';\nimport {FALSE, TRUE} from '../functions.js';\nimport {MAC, WEBKIT} from '../has.js';\nimport {assert} from '../asserts.js';\n\n/**\n * A function that takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a\n * `{boolean}`. If the condition is met, true should be returned.\n *\n * @typedef {function(this: ?, import(\"../MapBrowserEvent.js\").default): boolean} Condition\n */\n\n/**\n * Creates a condition function that passes when all provided conditions pass.\n * @param {...Condition} var_args Conditions to check.\n * @return {Condition} Condition function.\n */\nexport function all(var_args) {\n  const conditions = arguments;\n  /**\n   * @param {import(\"../MapBrowserEvent.js\").default} event Event.\n   * @return {boolean} All conditions passed.\n   */\n  return function (event) {\n    let pass = true;\n    for (let i = 0, ii = conditions.length; i < ii; ++i) {\n      pass = pass && conditions[i](event);\n      if (!pass) {\n        break;\n      }\n    }\n    return pass;\n  };\n}\n\n/**\n * Return `true` if only the alt-key is pressed, `false` otherwise (e.g. when\n * additionally the shift-key is pressed).\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} True if only the alt key is pressed.\n * @api\n */\nexport const altKeyOnly = function (mapBrowserEvent) {\n  const originalEvent = /** @type {KeyboardEvent|MouseEvent|TouchEvent} */ (\n    mapBrowserEvent.originalEvent\n  );\n  return (\n    originalEvent.altKey &&\n    !(originalEvent.metaKey || originalEvent.ctrlKey) &&\n    !originalEvent.shiftKey\n  );\n};\n\n/**\n * Return `true` if only the alt-key and shift-key is pressed, `false` otherwise\n * (e.g. when additionally the platform-modifier-key is pressed).\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} True if only the alt and shift keys are pressed.\n * @api\n */\nexport const altShiftKeysOnly = function (mapBrowserEvent) {\n  const originalEvent = /** @type {KeyboardEvent|MouseEvent|TouchEvent} */ (\n    mapBrowserEvent.originalEvent\n  );\n  return (\n    originalEvent.altKey &&\n    !(originalEvent.metaKey || originalEvent.ctrlKey) &&\n    originalEvent.shiftKey\n  );\n};\n\n/**\n * Return `true` if the map has the focus. This condition requires a map target\n * element with a `tabindex` attribute, e.g. `<div id=\"map\" tabindex=\"1\">`.\n *\n * @param {import(\"../MapBrowserEvent.js\").default} event Map browser event.\n * @return {boolean} The map has the focus.\n * @api\n */\nexport const focus = function (event) {\n  const targetElement = event.map.getTargetElement();\n  const activeElement = event.map.getOwnerDocument().activeElement;\n  return targetElement.contains(activeElement);\n};\n\n/**\n * Return `true` if the map has the focus or no 'tabindex' attribute set.\n *\n * @param {import(\"../MapBrowserEvent.js\").default} event Map browser event.\n * @return {boolean} The map container has the focus or no 'tabindex' attribute.\n */\nexport const focusWithTabindex = function (event) {\n  return event.map.getTargetElement().hasAttribute('tabindex')\n    ? focus(event)\n    : true;\n};\n\n/**\n * Return always true.\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} True.\n * @api\n */\nexport const always = TRUE;\n\n/**\n * Return `true` if the event is a `click` event, `false` otherwise.\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} True if the event is a map `click` event.\n * @api\n */\nexport const click = function (mapBrowserEvent) {\n  return mapBrowserEvent.type == MapBrowserEventType.CLICK;\n};\n\n/**\n * Return `true` if the event has an \"action\"-producing mouse button.\n *\n * By definition, this includes left-click on windows/linux, and left-click\n * without the ctrl key on Macs.\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} The result.\n */\nexport const mouseActionButton = function (mapBrowserEvent) {\n  const originalEvent = /** @type {MouseEvent} */ (\n    mapBrowserEvent.originalEvent\n  );\n  return originalEvent.button == 0 && !(WEBKIT && MAC && originalEvent.ctrlKey);\n};\n\n/**\n * Return always false.\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} False.\n * @api\n */\nexport const never = FALSE;\n\n/**\n * Return `true` if the browser event is a `pointermove` event, `false`\n * otherwise.\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} True if the browser event is a `pointermove` event.\n * @api\n */\nexport const pointerMove = function (mapBrowserEvent) {\n  return mapBrowserEvent.type == 'pointermove';\n};\n\n/**\n * Return `true` if the event is a map `singleclick` event, `false` otherwise.\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} True if the event is a map `singleclick` event.\n * @api\n */\nexport const singleClick = function (mapBrowserEvent) {\n  return mapBrowserEvent.type == MapBrowserEventType.SINGLECLICK;\n};\n\n/**\n * Return `true` if the event is a map `dblclick` event, `false` otherwise.\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} True if the event is a map `dblclick` event.\n * @api\n */\nexport const doubleClick = function (mapBrowserEvent) {\n  return mapBrowserEvent.type == MapBrowserEventType.DBLCLICK;\n};\n\n/**\n * Return `true` if no modifier key (alt-, shift- or platform-modifier-key) is\n * pressed.\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} True only if there no modifier keys are pressed.\n * @api\n */\nexport const noModifierKeys = function (mapBrowserEvent) {\n  const originalEvent = /** @type {KeyboardEvent|MouseEvent|TouchEvent} */ (\n    mapBrowserEvent.originalEvent\n  );\n  return (\n    !originalEvent.altKey &&\n    !(originalEvent.metaKey || originalEvent.ctrlKey) &&\n    !originalEvent.shiftKey\n  );\n};\n\n/**\n * Return `true` if only the platform-modifier-key (the meta-key on Mac,\n * ctrl-key otherwise) is pressed, `false` otherwise (e.g. when additionally\n * the shift-key is pressed).\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} True if only the platform modifier key is pressed.\n * @api\n */\nexport const platformModifierKeyOnly = function (mapBrowserEvent) {\n  const originalEvent = /** @type {KeyboardEvent|MouseEvent|TouchEvent} */ (\n    mapBrowserEvent.originalEvent\n  );\n  return (\n    !originalEvent.altKey &&\n    (MAC ? originalEvent.metaKey : originalEvent.ctrlKey) &&\n    !originalEvent.shiftKey\n  );\n};\n\n/**\n * Return `true` if only the shift-key is pressed, `false` otherwise (e.g. when\n * additionally the alt-key is pressed).\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} True if only the shift key is pressed.\n * @api\n */\nexport const shiftKeyOnly = function (mapBrowserEvent) {\n  const originalEvent = /** @type {KeyboardEvent|MouseEvent|TouchEvent} */ (\n    mapBrowserEvent.originalEvent\n  );\n  return (\n    !originalEvent.altKey &&\n    !(originalEvent.metaKey || originalEvent.ctrlKey) &&\n    originalEvent.shiftKey\n  );\n};\n\n/**\n * Return `true` if the target element is not editable, i.e. not an `input`,\n * `select`, or `textarea` element and no `contenteditable` attribute is\n * set or inherited, `false` otherwise.\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} True only if the target element is not editable.\n * @api\n */\nexport const targetNotEditable = function (mapBrowserEvent) {\n  const originalEvent = /** @type {KeyboardEvent|MouseEvent|TouchEvent} */ (\n    mapBrowserEvent.originalEvent\n  );\n  const tagName = /** @type {Element} */ (originalEvent.target).tagName;\n  return (\n    tagName !== 'INPUT' &&\n    tagName !== 'SELECT' &&\n    tagName !== 'TEXTAREA' &&\n    // `isContentEditable` is only available on `HTMLElement`, but it may also be a\n    // different type like `SVGElement`.\n    // @ts-ignore\n    !originalEvent.target.isContentEditable\n  );\n};\n\n/**\n * Return `true` if the event originates from a mouse device.\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} True if the event originates from a mouse device.\n * @api\n */\nexport const mouseOnly = function (mapBrowserEvent) {\n  const pointerEvent = /** @type {import(\"../MapBrowserEvent\").default} */ (\n    mapBrowserEvent\n  ).originalEvent;\n  assert(pointerEvent !== undefined, 56); // mapBrowserEvent must originate from a pointer event\n  // see https://www.w3.org/TR/pointerevents/#widl-PointerEvent-pointerType\n  return pointerEvent.pointerType == 'mouse';\n};\n\n/**\n * Return `true` if the event originates from a touchable device.\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} True if the event originates from a touchable device.\n * @api\n */\nexport const touchOnly = function (mapBrowserEvent) {\n  const pointerEvt = /** @type {import(\"../MapBrowserEvent\").default} */ (\n    mapBrowserEvent\n  ).originalEvent;\n  assert(pointerEvt !== undefined, 56); // mapBrowserEvent must originate from a pointer event\n  // see https://www.w3.org/TR/pointerevents/#widl-PointerEvent-pointerType\n  return pointerEvt.pointerType === 'touch';\n};\n\n/**\n * Return `true` if the event originates from a digital pen.\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} True if the event originates from a digital pen.\n * @api\n */\nexport const penOnly = function (mapBrowserEvent) {\n  const pointerEvt = /** @type {import(\"../MapBrowserEvent\").default} */ (\n    mapBrowserEvent\n  ).originalEvent;\n  assert(pointerEvt !== undefined, 56); // mapBrowserEvent must originate from a pointer event\n  // see https://www.w3.org/TR/pointerevents/#widl-PointerEvent-pointerType\n  return pointerEvt.pointerType === 'pen';\n};\n\n/**\n * Return `true` if the event originates from a primary pointer in\n * contact with the surface or if the left mouse button is pressed.\n * See https://www.w3.org/TR/pointerevents/#button-states.\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} True if the event originates from a primary pointer.\n * @api\n */\nexport const primaryAction = function (mapBrowserEvent) {\n  const pointerEvent = /** @type {import(\"../MapBrowserEvent\").default} */ (\n    mapBrowserEvent\n  ).originalEvent;\n  assert(pointerEvent !== undefined, 56); // mapBrowserEvent must originate from a pointer event\n  return pointerEvent.isPrimary && pointerEvent.button === 0;\n};\n","/**\n * @module ol/interaction/DragPan\n */\nimport PointerInteraction, {\n  centroid as centroidFromPointers,\n} from './Pointer.js';\nimport {FALSE} from '../functions.js';\nimport {\n  all,\n  focusWithTabindex,\n  noModifierKeys,\n  primaryAction,\n} from '../events/condition.js';\nimport {easeOut} from '../easing.js';\nimport {\n  rotate as rotateCoordinate,\n  scale as scaleCoordinate,\n} from '../coordinate.js';\n\n/**\n * @typedef {Object} Options\n * @property {import(\"../events/condition.js\").Condition} [condition] A function that takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a boolean\n * to indicate whether that event should be handled.\n * Default is {@link module:ol/events/condition.noModifierKeys} and {@link module:ol/events/condition.primaryAction}.\n * @property {boolean} [onFocusOnly=false] When the map's target has a `tabindex` attribute set,\n * the interaction will only handle events when the map has the focus.\n * @property {import(\"../Kinetic.js\").default} [kinetic] Kinetic inertia to apply to the pan.\n */\n\n/**\n * @classdesc\n * Allows the user to pan the map by dragging the map.\n * @api\n */\nclass DragPan extends PointerInteraction {\n  /**\n   * @param {Options} [options] Options.\n   */\n  constructor(options) {\n    super({\n      stopDown: FALSE,\n    });\n\n    options = options ? options : {};\n\n    /**\n     * @private\n     * @type {import(\"../Kinetic.js\").default|undefined}\n     */\n    this.kinetic_ = options.kinetic;\n\n    /**\n     * @type {import(\"../pixel.js\").Pixel}\n     */\n    this.lastCentroid = null;\n\n    /**\n     * @type {number}\n     */\n    this.lastPointersCount_;\n\n    /**\n     * @type {boolean}\n     */\n    this.panning_ = false;\n\n    const condition = options.condition\n      ? options.condition\n      : all(noModifierKeys, primaryAction);\n\n    /**\n     * @private\n     * @type {import(\"../events/condition.js\").Condition}\n     */\n    this.condition_ = options.onFocusOnly\n      ? all(focusWithTabindex, condition)\n      : condition;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.noKinetic_ = false;\n  }\n\n  /**\n   * Handle pointer drag events.\n   * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Event.\n   */\n  handleDragEvent(mapBrowserEvent) {\n    const map = mapBrowserEvent.map;\n    if (!this.panning_) {\n      this.panning_ = true;\n      map.getView().beginInteraction();\n    }\n    const targetPointers = this.targetPointers;\n    const centroid = map.getEventPixel(centroidFromPointers(targetPointers));\n    if (targetPointers.length == this.lastPointersCount_) {\n      if (this.kinetic_) {\n        this.kinetic_.update(centroid[0], centroid[1]);\n      }\n      if (this.lastCentroid) {\n        const delta = [\n          this.lastCentroid[0] - centroid[0],\n          centroid[1] - this.lastCentroid[1],\n        ];\n        const map = mapBrowserEvent.map;\n        const view = map.getView();\n        scaleCoordinate(delta, view.getResolution());\n        rotateCoordinate(delta, view.getRotation());\n        view.adjustCenterInternal(delta);\n      }\n    } else if (this.kinetic_) {\n      // reset so we don't overestimate the kinetic energy after\n      // after one finger down, tiny drag, second finger down\n      this.kinetic_.begin();\n    }\n    this.lastCentroid = centroid;\n    this.lastPointersCount_ = targetPointers.length;\n    mapBrowserEvent.originalEvent.preventDefault();\n  }\n\n  /**\n   * Handle pointer up events.\n   * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Event.\n   * @return {boolean} If the event was consumed.\n   */\n  handleUpEvent(mapBrowserEvent) {\n    const map = mapBrowserEvent.map;\n    const view = map.getView();\n    if (this.targetPointers.length === 0) {\n      if (!this.noKinetic_ && this.kinetic_ && this.kinetic_.end()) {\n        const distance = this.kinetic_.getDistance();\n        const angle = this.kinetic_.getAngle();\n        const center = view.getCenterInternal();\n        const centerpx = map.getPixelFromCoordinateInternal(center);\n        const dest = map.getCoordinateFromPixelInternal([\n          centerpx[0] - distance * Math.cos(angle),\n          centerpx[1] - distance * Math.sin(angle),\n        ]);\n        view.animateInternal({\n          center: view.getConstrainedCenter(dest),\n          duration: 500,\n          easing: easeOut,\n        });\n      }\n      if (this.panning_) {\n        this.panning_ = false;\n        view.endInteraction();\n      }\n      return false;\n    }\n    if (this.kinetic_) {\n      // reset so we don't overestimate the kinetic energy after\n      // after one finger up, tiny drag, second finger up\n      this.kinetic_.begin();\n    }\n    this.lastCentroid = null;\n    return true;\n  }\n\n  /**\n   * Handle pointer down events.\n   * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Event.\n   * @return {boolean} If the event was consumed.\n   */\n  handleDownEvent(mapBrowserEvent) {\n    if (this.targetPointers.length > 0 && this.condition_(mapBrowserEvent)) {\n      const map = mapBrowserEvent.map;\n      const view = map.getView();\n      this.lastCentroid = null;\n      // stop any current animation\n      if (view.getAnimating()) {\n        view.cancelAnimations();\n      }\n      if (this.kinetic_) {\n        this.kinetic_.begin();\n      }\n      // No kinetic as soon as more than one pointer on the screen is\n      // detected. This is to prevent nasty pans after pinch.\n      this.noKinetic_ = this.targetPointers.length > 1;\n      return true;\n    }\n    return false;\n  }\n}\n\nexport default DragPan;\n","/**\n * @module ol/interaction/DragRotate\n */\nimport PointerInteraction from './Pointer.js';\nimport {FALSE} from '../functions.js';\nimport {\n  altShiftKeysOnly,\n  mouseActionButton,\n  mouseOnly,\n} from '../events/condition.js';\nimport {disable} from '../rotationconstraint.js';\n\n/**\n * @typedef {Object} Options\n * @property {import(\"../events/condition.js\").Condition} [condition] A function that takes an\n * {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a boolean\n * to indicate whether that event should be handled.\n * Default is {@link module:ol/events/condition.altShiftKeysOnly}.\n * @property {number} [duration=250] Animation duration in milliseconds.\n */\n\n/**\n * @classdesc\n * Allows the user to rotate the map by clicking and dragging on the map,\n * normally combined with an {@link module:ol/events/condition} that limits\n * it to when the alt and shift keys are held down.\n *\n * This interaction is only supported for mouse devices.\n * @api\n */\nclass DragRotate extends PointerInteraction {\n  /**\n   * @param {Options} [options] Options.\n   */\n  constructor(options) {\n    options = options ? options : {};\n\n    super({\n      stopDown: FALSE,\n    });\n\n    /**\n     * @private\n     * @type {import(\"../events/condition.js\").Condition}\n     */\n    this.condition_ = options.condition ? options.condition : altShiftKeysOnly;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.lastAngle_ = undefined;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.duration_ = options.duration !== undefined ? options.duration : 250;\n  }\n\n  /**\n   * Handle pointer drag events.\n   * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Event.\n   */\n  handleDragEvent(mapBrowserEvent) {\n    if (!mouseOnly(mapBrowserEvent)) {\n      return;\n    }\n\n    const map = mapBrowserEvent.map;\n    const view = map.getView();\n    if (view.getConstraints().rotation === disable) {\n      return;\n    }\n    const size = map.getSize();\n    const offset = mapBrowserEvent.pixel;\n    const theta = Math.atan2(size[1] / 2 - offset[1], offset[0] - size[0] / 2);\n    if (this.lastAngle_ !== undefined) {\n      const delta = theta - this.lastAngle_;\n      view.adjustRotationInternal(-delta);\n    }\n    this.lastAngle_ = theta;\n  }\n\n  /**\n   * Handle pointer up events.\n   * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Event.\n   * @return {boolean} If the event was consumed.\n   */\n  handleUpEvent(mapBrowserEvent) {\n    if (!mouseOnly(mapBrowserEvent)) {\n      return true;\n    }\n\n    const map = mapBrowserEvent.map;\n    const view = map.getView();\n    view.endInteraction(this.duration_);\n    return false;\n  }\n\n  /**\n   * Handle pointer down events.\n   * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Event.\n   * @return {boolean} If the event was consumed.\n   */\n  handleDownEvent(mapBrowserEvent) {\n    if (!mouseOnly(mapBrowserEvent)) {\n      return false;\n    }\n\n    if (\n      mouseActionButton(mapBrowserEvent) &&\n      this.condition_(mapBrowserEvent)\n    ) {\n      const map = mapBrowserEvent.map;\n      map.getView().beginInteraction();\n      this.lastAngle_ = undefined;\n      return true;\n    }\n    return false;\n  }\n}\n\nexport default DragRotate;\n","/**\n * @module ol/render/Box\n */\n\nimport Disposable from '../Disposable.js';\nimport Polygon from '../geom/Polygon.js';\n\nclass RenderBox extends Disposable {\n  /**\n   * @param {string} className CSS class name.\n   */\n  constructor(className) {\n    super();\n\n    /**\n     * @type {import(\"../geom/Polygon.js\").default}\n     * @private\n     */\n    this.geometry_ = null;\n\n    /**\n     * @type {HTMLDivElement}\n     * @private\n     */\n    this.element_ = document.createElement('div');\n    this.element_.style.position = 'absolute';\n    this.element_.style.pointerEvents = 'auto';\n    this.element_.className = 'ol-box ' + className;\n\n    /**\n     * @private\n     * @type {import(\"../Map.js\").default|null}\n     */\n    this.map_ = null;\n\n    /**\n     * @private\n     * @type {import(\"../pixel.js\").Pixel}\n     */\n    this.startPixel_ = null;\n\n    /**\n     * @private\n     * @type {import(\"../pixel.js\").Pixel}\n     */\n    this.endPixel_ = null;\n  }\n\n  /**\n   * Clean up.\n   */\n  disposeInternal() {\n    this.setMap(null);\n  }\n\n  /**\n   * @private\n   */\n  render_() {\n    const startPixel = this.startPixel_;\n    const endPixel = this.endPixel_;\n    const px = 'px';\n    const style = this.element_.style;\n    style.left = Math.min(startPixel[0], endPixel[0]) + px;\n    style.top = Math.min(startPixel[1], endPixel[1]) + px;\n    style.width = Math.abs(endPixel[0] - startPixel[0]) + px;\n    style.height = Math.abs(endPixel[1] - startPixel[1]) + px;\n  }\n\n  /**\n   * @param {import(\"../Map.js\").default|null} map Map.\n   */\n  setMap(map) {\n    if (this.map_) {\n      this.map_.getOverlayContainer().removeChild(this.element_);\n      const style = this.element_.style;\n      style.left = 'inherit';\n      style.top = 'inherit';\n      style.width = 'inherit';\n      style.height = 'inherit';\n    }\n    this.map_ = map;\n    if (this.map_) {\n      this.map_.getOverlayContainer().appendChild(this.element_);\n    }\n  }\n\n  /**\n   * @param {import(\"../pixel.js\").Pixel} startPixel Start pixel.\n   * @param {import(\"../pixel.js\").Pixel} endPixel End pixel.\n   */\n  setPixels(startPixel, endPixel) {\n    this.startPixel_ = startPixel;\n    this.endPixel_ = endPixel;\n    this.createOrUpdateGeometry();\n    this.render_();\n  }\n\n  /**\n   * Creates or updates the cached geometry.\n   */\n  createOrUpdateGeometry() {\n    const startPixel = this.startPixel_;\n    const endPixel = this.endPixel_;\n    const pixels = [\n      startPixel,\n      [startPixel[0], endPixel[1]],\n      endPixel,\n      [endPixel[0], startPixel[1]],\n    ];\n    const coordinates = pixels.map(\n      this.map_.getCoordinateFromPixelInternal,\n      this.map_\n    );\n    // close the polygon\n    coordinates[4] = coordinates[0].slice();\n    if (!this.geometry_) {\n      this.geometry_ = new Polygon([coordinates]);\n    } else {\n      this.geometry_.setCoordinates([coordinates]);\n    }\n  }\n\n  /**\n   * @return {import(\"../geom/Polygon.js\").default} Geometry.\n   */\n  getGeometry() {\n    return this.geometry_;\n  }\n}\n\nexport default RenderBox;\n","/**\n * @module ol/interaction/DragBox\n */\n// FIXME draw drag box\nimport Event from '../events/Event.js';\nimport PointerInteraction from './Pointer.js';\nimport RenderBox from '../render/Box.js';\nimport {mouseActionButton} from '../events/condition.js';\n\n/**\n * A function that takes a {@link module:ol/MapBrowserEvent~MapBrowserEvent} and two\n * {@link module:ol/pixel~Pixel}s and returns a `{boolean}`. If the condition is met,\n * true should be returned.\n * @typedef {function(this: ?, import(\"../MapBrowserEvent.js\").default, import(\"../pixel.js\").Pixel, import(\"../pixel.js\").Pixel):boolean} EndCondition\n */\n\n/**\n * @typedef {Object} Options\n * @property {string} [className='ol-dragbox'] CSS class name for styling the box.\n * @property {import(\"../events/condition.js\").Condition} [condition] A function that takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a boolean\n * to indicate whether that event should be handled.\n * Default is {@link ol/events/condition~mouseActionButton}.\n * @property {number} [minArea=64] The minimum area of the box in pixel, this value is used by the default\n * `boxEndCondition` function.\n * @property {EndCondition} [boxEndCondition] A function that takes a {@link module:ol/MapBrowserEvent~MapBrowserEvent} and two\n * {@link module:ol/pixel~Pixel}s to indicate whether a `boxend` event should be fired.\n * Default is `true` if the area of the box is bigger than the `minArea` option.\n * @property {function(this:DragBox, import(\"../MapBrowserEvent.js\").default):void} [onBoxEnd] Code to execute just\n * before `boxend` is fired.\n */\n\n/**\n * @enum {string}\n */\nconst DragBoxEventType = {\n  /**\n   * Triggered upon drag box start.\n   * @event DragBoxEvent#boxstart\n   * @api\n   */\n  BOXSTART: 'boxstart',\n\n  /**\n   * Triggered on drag when box is active.\n   * @event DragBoxEvent#boxdrag\n   * @api\n   */\n  BOXDRAG: 'boxdrag',\n\n  /**\n   * Triggered upon drag box end.\n   * @event DragBoxEvent#boxend\n   * @api\n   */\n  BOXEND: 'boxend',\n\n  /**\n   * Triggered upon drag box canceled.\n   * @event DragBoxEvent#boxcancel\n   * @api\n   */\n  BOXCANCEL: 'boxcancel',\n};\n\n/**\n * @classdesc\n * Events emitted by {@link module:ol/interaction/DragBox~DragBox} instances are instances of\n * this type.\n */\nexport class DragBoxEvent extends Event {\n  /**\n   * @param {string} type The event type.\n   * @param {import(\"../coordinate.js\").Coordinate} coordinate The event coordinate.\n   * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Originating event.\n   */\n  constructor(type, coordinate, mapBrowserEvent) {\n    super(type);\n\n    /**\n     * The coordinate of the drag event.\n     * @const\n     * @type {import(\"../coordinate.js\").Coordinate}\n     * @api\n     */\n    this.coordinate = coordinate;\n\n    /**\n     * @const\n     * @type {import(\"../MapBrowserEvent.js\").default}\n     * @api\n     */\n    this.mapBrowserEvent = mapBrowserEvent;\n  }\n}\n\n/***\n * @template Return\n * @typedef {import(\"../Observable\").OnSignature<import(\"../Observable\").EventTypes, import(\"../events/Event.js\").default, Return> &\n *   import(\"../Observable\").OnSignature<import(\"../ObjectEventType\").Types|\n *     'change:active', import(\"../Object\").ObjectEvent, Return> &\n *   import(\"../Observable\").OnSignature<'boxcancel'|'boxdrag'|'boxend'|'boxstart', DragBoxEvent, Return> &\n *   import(\"../Observable\").CombinedOnSignature<import(\"../Observable\").EventTypes|import(\"../ObjectEventType\").Types|\n *     'change:active'|'boxcancel'|'boxdrag'|'boxend', Return>} DragBoxOnSignature\n */\n\n/**\n * @classdesc\n * Allows the user to draw a vector box by clicking and dragging on the map,\n * normally combined with an {@link module:ol/events/condition} that limits\n * it to when the shift or other key is held down. This is used, for example,\n * for zooming to a specific area of the map\n * (see {@link module:ol/interaction/DragZoom~DragZoom} and\n * {@link module:ol/interaction/DragRotateAndZoom~DragRotateAndZoom}).\n *\n * @fires DragBoxEvent\n * @api\n */\nclass DragBox extends PointerInteraction {\n  /**\n   * @param {Options} [options] Options.\n   */\n  constructor(options) {\n    super();\n\n    /***\n     * @type {DragBoxOnSignature<import(\"../events\").EventsKey>}\n     */\n    this.on;\n\n    /***\n     * @type {DragBoxOnSignature<import(\"../events\").EventsKey>}\n     */\n    this.once;\n\n    /***\n     * @type {DragBoxOnSignature<void>}\n     */\n    this.un;\n\n    options = options ? options : {};\n\n    /**\n     * @type {import(\"../render/Box.js\").default}\n     * @private\n     */\n    this.box_ = new RenderBox(options.className || 'ol-dragbox');\n\n    /**\n     * @type {number}\n     * @private\n     */\n    this.minArea_ = options.minArea !== undefined ? options.minArea : 64;\n\n    if (options.onBoxEnd) {\n      this.onBoxEnd = options.onBoxEnd;\n    }\n\n    /**\n     * @type {import(\"../pixel.js\").Pixel}\n     * @private\n     */\n    this.startPixel_ = null;\n\n    /**\n     * @private\n     * @type {import(\"../events/condition.js\").Condition}\n     */\n    this.condition_ = options.condition ? options.condition : mouseActionButton;\n\n    /**\n     * @private\n     * @type {EndCondition}\n     */\n    this.boxEndCondition_ = options.boxEndCondition\n      ? options.boxEndCondition\n      : this.defaultBoxEndCondition;\n  }\n\n  /**\n   * The default condition for determining whether the boxend event\n   * should fire.\n   * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent The originating MapBrowserEvent\n   *     leading to the box end.\n   * @param {import(\"../pixel.js\").Pixel} startPixel The starting pixel of the box.\n   * @param {import(\"../pixel.js\").Pixel} endPixel The end pixel of the box.\n   * @return {boolean} Whether or not the boxend condition should be fired.\n   */\n  defaultBoxEndCondition(mapBrowserEvent, startPixel, endPixel) {\n    const width = endPixel[0] - startPixel[0];\n    const height = endPixel[1] - startPixel[1];\n    return width * width + height * height >= this.minArea_;\n  }\n\n  /**\n   * Returns geometry of last drawn box.\n   * @return {import(\"../geom/Polygon.js\").default} Geometry.\n   * @api\n   */\n  getGeometry() {\n    return this.box_.getGeometry();\n  }\n\n  /**\n   * Handle pointer drag events.\n   * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Event.\n   */\n  handleDragEvent(mapBrowserEvent) {\n    this.box_.setPixels(this.startPixel_, mapBrowserEvent.pixel);\n\n    this.dispatchEvent(\n      new DragBoxEvent(\n        DragBoxEventType.BOXDRAG,\n        mapBrowserEvent.coordinate,\n        mapBrowserEvent\n      )\n    );\n  }\n\n  /**\n   * Handle pointer up events.\n   * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Event.\n   * @return {boolean} If the event was consumed.\n   */\n  handleUpEvent(mapBrowserEvent) {\n    this.box_.setMap(null);\n\n    const completeBox = this.boxEndCondition_(\n      mapBrowserEvent,\n      this.startPixel_,\n      mapBrowserEvent.pixel\n    );\n    if (completeBox) {\n      this.onBoxEnd(mapBrowserEvent);\n    }\n    this.dispatchEvent(\n      new DragBoxEvent(\n        completeBox ? DragBoxEventType.BOXEND : DragBoxEventType.BOXCANCEL,\n        mapBrowserEvent.coordinate,\n        mapBrowserEvent\n      )\n    );\n    return false;\n  }\n\n  /**\n   * Handle pointer down events.\n   * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Event.\n   * @return {boolean} If the event was consumed.\n   */\n  handleDownEvent(mapBrowserEvent) {\n    if (this.condition_(mapBrowserEvent)) {\n      this.startPixel_ = mapBrowserEvent.pixel;\n      this.box_.setMap(mapBrowserEvent.map);\n      this.box_.setPixels(this.startPixel_, this.startPixel_);\n      this.dispatchEvent(\n        new DragBoxEvent(\n          DragBoxEventType.BOXSTART,\n          mapBrowserEvent.coordinate,\n          mapBrowserEvent\n        )\n      );\n      return true;\n    }\n    return false;\n  }\n\n  /**\n   * Function to execute just before `onboxend` is fired\n   * @param {import(\"../MapBrowserEvent.js\").default} event Event.\n   */\n  onBoxEnd(event) {}\n}\n\nexport default DragBox;\n","/**\n * @module ol/interaction/DragZoom\n */\nimport DragBox from './DragBox.js';\nimport {easeOut} from '../easing.js';\nimport {shiftKeyOnly} from '../events/condition.js';\n\n/**\n * @typedef {Object} Options\n * @property {string} [className='ol-dragzoom'] CSS class name for styling the\n * box.\n * @property {import(\"../events/condition.js\").Condition} [condition] A function that\n * takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a\n * boolean to indicate whether that event should be handled.\n * Default is {@link module:ol/events/condition.shiftKeyOnly}.\n * @property {number} [duration=200] Animation duration in milliseconds.\n * @property {boolean} [out=false] Use interaction for zooming out.\n * @property {number} [minArea=64] The minimum area of the box in pixel, this value is used by the parent default\n * `boxEndCondition` function.\n */\n\n/**\n * @classdesc\n * Allows the user to zoom the map by clicking and dragging on the map,\n * normally combined with an {@link module:ol/events/condition} that limits\n * it to when a key, shift by default, is held down.\n *\n * To change the style of the box, use CSS and the `.ol-dragzoom` selector, or\n * your custom one configured with `className`.\n * @api\n */\nclass DragZoom extends DragBox {\n  /**\n   * @param {Options} [options] Options.\n   */\n  constructor(options) {\n    options = options ? options : {};\n\n    const condition = options.condition ? options.condition : shiftKeyOnly;\n\n    super({\n      condition: condition,\n      className: options.className || 'ol-dragzoom',\n      minArea: options.minArea,\n    });\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.duration_ = options.duration !== undefined ? options.duration : 200;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.out_ = options.out !== undefined ? options.out : false;\n  }\n\n  /**\n   * Function to execute just before `onboxend` is fired\n   * @param {import(\"../MapBrowserEvent.js\").default} event Event.\n   */\n  onBoxEnd(event) {\n    const map = this.getMap();\n    const view = /** @type {!import(\"../View.js\").default} */ (map.getView());\n    let geometry = this.getGeometry();\n\n    if (this.out_) {\n      const rotatedExtent = view.rotatedExtentForGeometry(geometry);\n      const resolution = view.getResolutionForExtentInternal(rotatedExtent);\n      const factor = view.getResolution() / resolution;\n      geometry = geometry.clone();\n      geometry.scale(factor * factor);\n    }\n\n    view.fitInternal(geometry, {\n      duration: this.duration_,\n      easing: easeOut,\n    });\n  }\n}\n\nexport default DragZoom;\n","/**\n * @module ol/events/Key\n */\n\n/**\n * @enum {string}\n * @const\n */\nexport default {\n  LEFT: 'ArrowLeft',\n  UP: 'ArrowUp',\n  RIGHT: 'ArrowRight',\n  DOWN: 'ArrowDown',\n};\n","/**\n * @module ol/interaction/KeyboardPan\n */\nimport EventType from '../events/EventType.js';\nimport Interaction, {pan} from './Interaction.js';\nimport Key from '../events/Key.js';\nimport {noModifierKeys, targetNotEditable} from '../events/condition.js';\nimport {rotate as rotateCoordinate} from '../coordinate.js';\n\n/**\n * @typedef {Object} Options\n * @property {import(\"../events/condition.js\").Condition} [condition] A function that\n * takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a\n * boolean to indicate whether that event should be handled. Default is\n * {@link module:ol/events/condition.noModifierKeys} and\n * {@link module:ol/events/condition.targetNotEditable}.\n * @property {number} [duration=100] Animation duration in milliseconds.\n * @property {number} [pixelDelta=128] The amount of pixels to pan on each key\n * press.\n */\n\n/**\n * @classdesc\n * Allows the user to pan the map using keyboard arrows.\n * Note that, although this interaction is by default included in maps,\n * the keys can only be used when browser focus is on the element to which\n * the keyboard events are attached. By default, this is the map div,\n * though you can change this with the `keyboardEventTarget` in\n * {@link module:ol/Map~Map}. `document` never loses focus but, for any other\n * element, focus will have to be on, and returned to, this element if the keys\n * are to function.\n * See also {@link module:ol/interaction/KeyboardZoom~KeyboardZoom}.\n * @api\n */\nclass KeyboardPan extends Interaction {\n  /**\n   * @param {Options} [options] Options.\n   */\n  constructor(options) {\n    super();\n\n    options = options || {};\n\n    /**\n     * @private\n     * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Browser event.\n     * @return {boolean} Combined condition result.\n     */\n    this.defaultCondition_ = function (mapBrowserEvent) {\n      return (\n        noModifierKeys(mapBrowserEvent) && targetNotEditable(mapBrowserEvent)\n      );\n    };\n\n    /**\n     * @private\n     * @type {import(\"../events/condition.js\").Condition}\n     */\n    this.condition_ =\n      options.condition !== undefined\n        ? options.condition\n        : this.defaultCondition_;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.duration_ = options.duration !== undefined ? options.duration : 100;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.pixelDelta_ =\n      options.pixelDelta !== undefined ? options.pixelDelta : 128;\n  }\n\n  /**\n   * Handles the {@link module:ol/MapBrowserEvent~MapBrowserEvent map browser event} if it was a\n   * `KeyEvent`, and decides the direction to pan to (if an arrow key was\n   * pressed).\n   * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n   * @return {boolean} `false` to stop event propagation.\n   */\n  handleEvent(mapBrowserEvent) {\n    let stopEvent = false;\n    if (mapBrowserEvent.type == EventType.KEYDOWN) {\n      const keyEvent = /** @type {KeyboardEvent} */ (\n        mapBrowserEvent.originalEvent\n      );\n      const key = keyEvent.key;\n      if (\n        this.condition_(mapBrowserEvent) &&\n        (key == Key.DOWN ||\n          key == Key.LEFT ||\n          key == Key.RIGHT ||\n          key == Key.UP)\n      ) {\n        const map = mapBrowserEvent.map;\n        const view = map.getView();\n        const mapUnitsDelta = view.getResolution() * this.pixelDelta_;\n        let deltaX = 0,\n          deltaY = 0;\n        if (key == Key.DOWN) {\n          deltaY = -mapUnitsDelta;\n        } else if (key == Key.LEFT) {\n          deltaX = -mapUnitsDelta;\n        } else if (key == Key.RIGHT) {\n          deltaX = mapUnitsDelta;\n        } else {\n          deltaY = mapUnitsDelta;\n        }\n        const delta = [deltaX, deltaY];\n        rotateCoordinate(delta, view.getRotation());\n        pan(view, delta, this.duration_);\n        keyEvent.preventDefault();\n        stopEvent = true;\n      }\n    }\n    return !stopEvent;\n  }\n}\n\nexport default KeyboardPan;\n","/**\n * @module ol/interaction/KeyboardZoom\n */\nimport EventType from '../events/EventType.js';\nimport Interaction, {zoomByDelta} from './Interaction.js';\nimport {targetNotEditable} from '../events/condition.js';\n\n/**\n * @typedef {Object} Options\n * @property {number} [duration=100] Animation duration in milliseconds.\n * @property {import(\"../events/condition.js\").Condition} [condition] A function that\n * takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a\n * boolean to indicate whether that event should be handled. Default is\n * {@link module:ol/events/condition.targetNotEditable}.\n * @property {number} [delta=1] The zoom level delta on each key press.\n */\n\n/**\n * @classdesc\n * Allows the user to zoom the map using keyboard + and -.\n * Note that, although this interaction is by default included in maps,\n * the keys can only be used when browser focus is on the element to which\n * the keyboard events are attached. By default, this is the map div,\n * though you can change this with the `keyboardEventTarget` in\n * {@link module:ol/Map~Map}. `document` never loses focus but, for any other\n * element, focus will have to be on, and returned to, this element if the keys\n * are to function.\n * See also {@link module:ol/interaction/KeyboardPan~KeyboardPan}.\n * @api\n */\nclass KeyboardZoom extends Interaction {\n  /**\n   * @param {Options} [options] Options.\n   */\n  constructor(options) {\n    super();\n\n    options = options ? options : {};\n\n    /**\n     * @private\n     * @type {import(\"../events/condition.js\").Condition}\n     */\n    this.condition_ = options.condition ? options.condition : targetNotEditable;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.delta_ = options.delta ? options.delta : 1;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.duration_ = options.duration !== undefined ? options.duration : 100;\n  }\n\n  /**\n   * Handles the {@link module:ol/MapBrowserEvent~MapBrowserEvent map browser event} if it was a\n   * `KeyEvent`, and decides whether to zoom in or out (depending on whether the\n   * key pressed was '+' or '-').\n   * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n   * @return {boolean} `false` to stop event propagation.\n   */\n  handleEvent(mapBrowserEvent) {\n    let stopEvent = false;\n    if (\n      mapBrowserEvent.type == EventType.KEYDOWN ||\n      mapBrowserEvent.type == EventType.KEYPRESS\n    ) {\n      const keyEvent = /** @type {KeyboardEvent} */ (\n        mapBrowserEvent.originalEvent\n      );\n      const key = keyEvent.key;\n      if (this.condition_(mapBrowserEvent) && (key === '+' || key === '-')) {\n        const map = mapBrowserEvent.map;\n        const delta = key === '+' ? this.delta_ : -this.delta_;\n        const view = map.getView();\n        zoomByDelta(view, delta, undefined, this.duration_);\n        keyEvent.preventDefault();\n        stopEvent = true;\n      }\n    }\n    return !stopEvent;\n  }\n}\n\nexport default KeyboardZoom;\n","/**\n * @module ol/interaction/MouseWheelZoom\n */\nimport EventType from '../events/EventType.js';\nimport Interaction, {zoomByDelta} from './Interaction.js';\nimport {DEVICE_PIXEL_RATIO, FIREFOX} from '../has.js';\nimport {all, always, focusWithTabindex} from '../events/condition.js';\nimport {clamp} from '../math.js';\n\n/**\n * @typedef {'trackpad' | 'wheel'} Mode\n */\n\n/**\n * @typedef {Object} Options\n * @property {import(\"../events/condition.js\").Condition} [condition] A function that\n * takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a\n * boolean to indicate whether that event should be handled. Default is\n * {@link module:ol/events/condition.always}.\n * @property {boolean} [onFocusOnly=false] When the map's target has a `tabindex` attribute set,\n * the interaction will only handle events when the map has the focus.\n * @property {number} [maxDelta=1] Maximum mouse wheel delta.\n * @property {number} [duration=250] Animation duration in milliseconds.\n * @property {number} [timeout=80] Mouse wheel timeout duration in milliseconds.\n * @property {boolean} [useAnchor=true] Enable zooming using the mouse's\n * location as the anchor. When set to `false`, zooming in and out will zoom to\n * the center of the screen instead of zooming on the mouse's location.\n * @property {boolean} [constrainResolution=false] If true, the mouse wheel zoom\n * event will always animate to the closest zoom level after an interaction;\n * false means intermediary zoom levels are allowed.\n */\n\n/**\n * @classdesc\n * Allows the user to zoom the map by scrolling the mouse wheel.\n * @api\n */\nclass MouseWheelZoom extends Interaction {\n  /**\n   * @param {Options} [options] Options.\n   */\n  constructor(options) {\n    options = options ? options : {};\n\n    super(\n      /** @type {import(\"./Interaction.js\").InteractionOptions} */ (options)\n    );\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.totalDelta_ = 0;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.lastDelta_ = 0;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.maxDelta_ = options.maxDelta !== undefined ? options.maxDelta : 1;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.duration_ = options.duration !== undefined ? options.duration : 250;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.timeout_ = options.timeout !== undefined ? options.timeout : 80;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.useAnchor_ =\n      options.useAnchor !== undefined ? options.useAnchor : true;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.constrainResolution_ =\n      options.constrainResolution !== undefined\n        ? options.constrainResolution\n        : false;\n\n    const condition = options.condition ? options.condition : always;\n\n    /**\n     * @private\n     * @type {import(\"../events/condition.js\").Condition}\n     */\n    this.condition_ = options.onFocusOnly\n      ? all(focusWithTabindex, condition)\n      : condition;\n\n    /**\n     * @private\n     * @type {?import(\"../coordinate.js\").Coordinate}\n     */\n    this.lastAnchor_ = null;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.startTime_ = undefined;\n\n    /**\n     * @private\n     * @type {?}\n     */\n    this.timeoutId_;\n\n    /**\n     * @private\n     * @type {Mode|undefined}\n     */\n    this.mode_ = undefined;\n\n    /**\n     * Trackpad events separated by this delay will be considered separate\n     * interactions.\n     * @type {number}\n     */\n    this.trackpadEventGap_ = 400;\n\n    /**\n     * @type {?}\n     */\n    this.trackpadTimeoutId_;\n\n    /**\n     * The number of delta values per zoom level\n     * @private\n     * @type {number}\n     */\n    this.deltaPerZoom_ = 300;\n  }\n\n  /**\n   * @private\n   */\n  endInteraction_() {\n    this.trackpadTimeoutId_ = undefined;\n    const map = this.getMap();\n    if (!map) {\n      return;\n    }\n    const view = map.getView();\n    view.endInteraction(\n      undefined,\n      this.lastDelta_ ? (this.lastDelta_ > 0 ? 1 : -1) : 0,\n      this.lastAnchor_\n    );\n  }\n\n  /**\n   * Handles the {@link module:ol/MapBrowserEvent~MapBrowserEvent map browser event} (if it was a mousewheel-event) and eventually\n   * zooms the map.\n   * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n   * @return {boolean} `false` to stop event propagation.\n   */\n  handleEvent(mapBrowserEvent) {\n    if (!this.condition_(mapBrowserEvent)) {\n      return true;\n    }\n    const type = mapBrowserEvent.type;\n    if (type !== EventType.WHEEL) {\n      return true;\n    }\n\n    const map = mapBrowserEvent.map;\n    const wheelEvent = /** @type {WheelEvent} */ (\n      mapBrowserEvent.originalEvent\n    );\n    wheelEvent.preventDefault();\n\n    if (this.useAnchor_) {\n      this.lastAnchor_ = mapBrowserEvent.coordinate;\n    }\n\n    // Delta normalisation inspired by\n    // https://github.com/mapbox/mapbox-gl-js/blob/001c7b9/js/ui/handler/scroll_zoom.js\n    let delta;\n    if (mapBrowserEvent.type == EventType.WHEEL) {\n      delta = wheelEvent.deltaY;\n      if (FIREFOX && wheelEvent.deltaMode === WheelEvent.DOM_DELTA_PIXEL) {\n        delta /= DEVICE_PIXEL_RATIO;\n      }\n      if (wheelEvent.deltaMode === WheelEvent.DOM_DELTA_LINE) {\n        delta *= 40;\n      }\n    }\n\n    if (delta === 0) {\n      return false;\n    }\n    this.lastDelta_ = delta;\n\n    const now = Date.now();\n\n    if (this.startTime_ === undefined) {\n      this.startTime_ = now;\n    }\n\n    if (!this.mode_ || now - this.startTime_ > this.trackpadEventGap_) {\n      this.mode_ = Math.abs(delta) < 4 ? 'trackpad' : 'wheel';\n    }\n\n    const view = map.getView();\n    if (\n      this.mode_ === 'trackpad' &&\n      !(view.getConstrainResolution() || this.constrainResolution_)\n    ) {\n      if (this.trackpadTimeoutId_) {\n        clearTimeout(this.trackpadTimeoutId_);\n      } else {\n        if (view.getAnimating()) {\n          view.cancelAnimations();\n        }\n        view.beginInteraction();\n      }\n      this.trackpadTimeoutId_ = setTimeout(\n        this.endInteraction_.bind(this),\n        this.timeout_\n      );\n      view.adjustZoom(-delta / this.deltaPerZoom_, this.lastAnchor_);\n      this.startTime_ = now;\n      return false;\n    }\n\n    this.totalDelta_ += delta;\n\n    const timeLeft = Math.max(this.timeout_ - (now - this.startTime_), 0);\n\n    clearTimeout(this.timeoutId_);\n    this.timeoutId_ = setTimeout(\n      this.handleWheelZoom_.bind(this, map),\n      timeLeft\n    );\n\n    return false;\n  }\n\n  /**\n   * @private\n   * @param {import(\"../Map.js\").default} map Map.\n   */\n  handleWheelZoom_(map) {\n    const view = map.getView();\n    if (view.getAnimating()) {\n      view.cancelAnimations();\n    }\n    let delta =\n      -clamp(\n        this.totalDelta_,\n        -this.maxDelta_ * this.deltaPerZoom_,\n        this.maxDelta_ * this.deltaPerZoom_\n      ) / this.deltaPerZoom_;\n    if (view.getConstrainResolution() || this.constrainResolution_) {\n      // view has a zoom constraint, zoom by 1\n      delta = delta ? (delta > 0 ? 1 : -1) : 0;\n    }\n    zoomByDelta(view, delta, this.lastAnchor_, this.duration_);\n\n    this.mode_ = undefined;\n    this.totalDelta_ = 0;\n    this.lastAnchor_ = null;\n    this.startTime_ = undefined;\n    this.timeoutId_ = undefined;\n  }\n\n  /**\n   * Enable or disable using the mouse's location as an anchor when zooming\n   * @param {boolean} useAnchor true to zoom to the mouse's location, false\n   * to zoom to the center of the map\n   * @api\n   */\n  setMouseAnchor(useAnchor) {\n    this.useAnchor_ = useAnchor;\n    if (!useAnchor) {\n      this.lastAnchor_ = null;\n    }\n  }\n}\n\nexport default MouseWheelZoom;\n","/**\n * @module ol/interaction/PinchRotate\n */\nimport PointerInteraction, {\n  centroid as centroidFromPointers,\n} from './Pointer.js';\nimport {FALSE} from '../functions.js';\nimport {disable} from '../rotationconstraint.js';\n\n/**\n * @typedef {Object} Options\n * @property {number} [duration=250] The duration of the animation in\n * milliseconds.\n * @property {number} [threshold=0.3] Minimal angle in radians to start a rotation.\n */\n\n/**\n * @classdesc\n * Allows the user to rotate the map by twisting with two fingers\n * on a touch screen.\n * @api\n */\nclass PinchRotate extends PointerInteraction {\n  /**\n   * @param {Options} [options] Options.\n   */\n  constructor(options) {\n    options = options ? options : {};\n\n    const pointerOptions = /** @type {import(\"./Pointer.js\").Options} */ (\n      options\n    );\n\n    if (!pointerOptions.stopDown) {\n      pointerOptions.stopDown = FALSE;\n    }\n\n    super(pointerOptions);\n\n    /**\n     * @private\n     * @type {import(\"../coordinate.js\").Coordinate}\n     */\n    this.anchor_ = null;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.lastAngle_ = undefined;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.rotating_ = false;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.rotationDelta_ = 0.0;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.threshold_ = options.threshold !== undefined ? options.threshold : 0.3;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.duration_ = options.duration !== undefined ? options.duration : 250;\n  }\n\n  /**\n   * Handle pointer drag events.\n   * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Event.\n   */\n  handleDragEvent(mapBrowserEvent) {\n    let rotationDelta = 0.0;\n\n    const touch0 = this.targetPointers[0];\n    const touch1 = this.targetPointers[1];\n\n    // angle between touches\n    const angle = Math.atan2(\n      touch1.clientY - touch0.clientY,\n      touch1.clientX - touch0.clientX\n    );\n\n    if (this.lastAngle_ !== undefined) {\n      const delta = angle - this.lastAngle_;\n      this.rotationDelta_ += delta;\n      if (!this.rotating_ && Math.abs(this.rotationDelta_) > this.threshold_) {\n        this.rotating_ = true;\n      }\n      rotationDelta = delta;\n    }\n    this.lastAngle_ = angle;\n\n    const map = mapBrowserEvent.map;\n    const view = map.getView();\n    if (view.getConstraints().rotation === disable) {\n      return;\n    }\n\n    // rotate anchor point.\n    // FIXME: should be the intersection point between the lines:\n    //     touch0,touch1 and previousTouch0,previousTouch1\n    this.anchor_ = map.getCoordinateFromPixelInternal(\n      map.getEventPixel(centroidFromPointers(this.targetPointers))\n    );\n\n    // rotate\n    if (this.rotating_) {\n      map.render();\n      view.adjustRotationInternal(rotationDelta, this.anchor_);\n    }\n  }\n\n  /**\n   * Handle pointer up events.\n   * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Event.\n   * @return {boolean} If the event was consumed.\n   */\n  handleUpEvent(mapBrowserEvent) {\n    if (this.targetPointers.length < 2) {\n      const map = mapBrowserEvent.map;\n      const view = map.getView();\n      view.endInteraction(this.duration_);\n      return false;\n    }\n    return true;\n  }\n\n  /**\n   * Handle pointer down events.\n   * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Event.\n   * @return {boolean} If the event was consumed.\n   */\n  handleDownEvent(mapBrowserEvent) {\n    if (this.targetPointers.length >= 2) {\n      const map = mapBrowserEvent.map;\n      this.anchor_ = null;\n      this.lastAngle_ = undefined;\n      this.rotating_ = false;\n      this.rotationDelta_ = 0.0;\n      if (!this.handlingDownUpSequence) {\n        map.getView().beginInteraction();\n      }\n      return true;\n    }\n    return false;\n  }\n}\n\nexport default PinchRotate;\n","/**\n * @module ol/interaction/PinchZoom\n */\nimport PointerInteraction, {\n  centroid as centroidFromPointers,\n} from './Pointer.js';\nimport {FALSE} from '../functions.js';\n\n/**\n * @typedef {Object} Options\n * @property {number} [duration=400] Animation duration in milliseconds.\n */\n\n/**\n * @classdesc\n * Allows the user to zoom the map by pinching with two fingers\n * on a touch screen.\n * @api\n */\nclass PinchZoom extends PointerInteraction {\n  /**\n   * @param {Options} [options] Options.\n   */\n  constructor(options) {\n    options = options ? options : {};\n\n    const pointerOptions = /** @type {import(\"./Pointer.js\").Options} */ (\n      options\n    );\n\n    if (!pointerOptions.stopDown) {\n      pointerOptions.stopDown = FALSE;\n    }\n\n    super(pointerOptions);\n\n    /**\n     * @private\n     * @type {import(\"../coordinate.js\").Coordinate}\n     */\n    this.anchor_ = null;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.duration_ = options.duration !== undefined ? options.duration : 400;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.lastDistance_ = undefined;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.lastScaleDelta_ = 1;\n  }\n\n  /**\n   * Handle pointer drag events.\n   * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Event.\n   */\n  handleDragEvent(mapBrowserEvent) {\n    let scaleDelta = 1.0;\n\n    const touch0 = this.targetPointers[0];\n    const touch1 = this.targetPointers[1];\n    const dx = touch0.clientX - touch1.clientX;\n    const dy = touch0.clientY - touch1.clientY;\n\n    // distance between touches\n    const distance = Math.sqrt(dx * dx + dy * dy);\n\n    if (this.lastDistance_ !== undefined) {\n      scaleDelta = this.lastDistance_ / distance;\n    }\n    this.lastDistance_ = distance;\n\n    const map = mapBrowserEvent.map;\n    const view = map.getView();\n\n    if (scaleDelta != 1.0) {\n      this.lastScaleDelta_ = scaleDelta;\n    }\n\n    // scale anchor point.\n    this.anchor_ = map.getCoordinateFromPixelInternal(\n      map.getEventPixel(centroidFromPointers(this.targetPointers))\n    );\n\n    // scale, bypass the resolution constraint\n    map.render();\n    view.adjustResolutionInternal(scaleDelta, this.anchor_);\n  }\n\n  /**\n   * Handle pointer up events.\n   * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Event.\n   * @return {boolean} If the event was consumed.\n   */\n  handleUpEvent(mapBrowserEvent) {\n    if (this.targetPointers.length < 2) {\n      const map = mapBrowserEvent.map;\n      const view = map.getView();\n      const direction = this.lastScaleDelta_ > 1 ? 1 : -1;\n      view.endInteraction(this.duration_, direction);\n      return false;\n    }\n    return true;\n  }\n\n  /**\n   * Handle pointer down events.\n   * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Event.\n   * @return {boolean} If the event was consumed.\n   */\n  handleDownEvent(mapBrowserEvent) {\n    if (this.targetPointers.length >= 2) {\n      const map = mapBrowserEvent.map;\n      this.anchor_ = null;\n      this.lastDistance_ = undefined;\n      this.lastScaleDelta_ = 1;\n      if (!this.handlingDownUpSequence) {\n        map.getView().beginInteraction();\n      }\n      return true;\n    }\n    return false;\n  }\n}\n\nexport default PinchZoom;\n","/**\n * @module ol/interaction/defaults\n */\nimport Collection from '../Collection.js';\nimport DoubleClickZoom from './DoubleClickZoom.js';\nimport DragPan from './DragPan.js';\nimport DragRotate from './DragRotate.js';\nimport DragZoom from './DragZoom.js';\nimport KeyboardPan from './KeyboardPan.js';\nimport KeyboardZoom from './KeyboardZoom.js';\nimport Kinetic from '../Kinetic.js';\nimport MouseWheelZoom from './MouseWheelZoom.js';\nimport PinchRotate from './PinchRotate.js';\nimport PinchZoom from './PinchZoom.js';\n\n/**\n * @typedef {Object} DefaultsOptions\n * @property {boolean} [altShiftDragRotate=true] Whether Alt-Shift-drag rotate is\n * desired.\n * @property {boolean} [onFocusOnly=false] Interact only when the map has the\n * focus. This affects the `MouseWheelZoom` and `DragPan` interactions and is\n * useful when page scroll is desired for maps that do not have the browser's\n * focus.\n * @property {boolean} [doubleClickZoom=true] Whether double click zoom is\n * desired.\n * @property {boolean} [keyboard=true] Whether keyboard interaction is desired.\n * @property {boolean} [mouseWheelZoom=true] Whether mousewheel zoom is desired.\n * @property {boolean} [shiftDragZoom=true] Whether Shift-drag zoom is desired.\n * @property {boolean} [dragPan=true] Whether drag pan is desired.\n * @property {boolean} [pinchRotate=true] Whether pinch rotate is desired.\n * @property {boolean} [pinchZoom=true] Whether pinch zoom is desired.\n * @property {number} [zoomDelta] Zoom level delta when using keyboard or double click zoom.\n * @property {number} [zoomDuration] Duration of the zoom animation in\n * milliseconds.\n */\n\n/**\n * Set of interactions included in maps by default. Specific interactions can be\n * excluded by setting the appropriate option to false in the constructor\n * options, but the order of the interactions is fixed.  If you want to specify\n * a different order for interactions, you will need to create your own\n * {@link module:ol/interaction/Interaction~Interaction} instances and insert\n * them into a {@link module:ol/Collection~Collection} in the order you want\n * before creating your {@link module:ol/Map~Map} instance. Changing the order can\n * be of interest if the event propagation needs to be stopped at a point.\n * The default set of interactions, in sequence, is:\n * * {@link module:ol/interaction/DragRotate~DragRotate}\n * * {@link module:ol/interaction/DoubleClickZoom~DoubleClickZoom}\n * * {@link module:ol/interaction/DragPan~DragPan}\n * * {@link module:ol/interaction/PinchRotate~PinchRotate}\n * * {@link module:ol/interaction/PinchZoom~PinchZoom}\n * * {@link module:ol/interaction/KeyboardPan~KeyboardPan}\n * * {@link module:ol/interaction/KeyboardZoom~KeyboardZoom}\n * * {@link module:ol/interaction/MouseWheelZoom~MouseWheelZoom}\n * * {@link module:ol/interaction/DragZoom~DragZoom}\n *\n * @param {DefaultsOptions} [options] Defaults options.\n * @return {Collection<import(\"./Interaction.js\").default>}\n * A collection of interactions to be used with the {@link module:ol/Map~Map}\n * constructor's `interactions` option.\n * @api\n */\nexport function defaults(options) {\n  options = options ? options : {};\n\n  /** @type {Collection<import(\"./Interaction.js\").default>} */\n  const interactions = new Collection();\n\n  const kinetic = new Kinetic(-0.005, 0.05, 100);\n\n  const altShiftDragRotate =\n    options.altShiftDragRotate !== undefined\n      ? options.altShiftDragRotate\n      : true;\n  if (altShiftDragRotate) {\n    interactions.push(new DragRotate());\n  }\n\n  const doubleClickZoom =\n    options.doubleClickZoom !== undefined ? options.doubleClickZoom : true;\n  if (doubleClickZoom) {\n    interactions.push(\n      new DoubleClickZoom({\n        delta: options.zoomDelta,\n        duration: options.zoomDuration,\n      })\n    );\n  }\n\n  const dragPan = options.dragPan !== undefined ? options.dragPan : true;\n  if (dragPan) {\n    interactions.push(\n      new DragPan({\n        onFocusOnly: options.onFocusOnly,\n        kinetic: kinetic,\n      })\n    );\n  }\n\n  const pinchRotate =\n    options.pinchRotate !== undefined ? options.pinchRotate : true;\n  if (pinchRotate) {\n    interactions.push(new PinchRotate());\n  }\n\n  const pinchZoom = options.pinchZoom !== undefined ? options.pinchZoom : true;\n  if (pinchZoom) {\n    interactions.push(\n      new PinchZoom({\n        duration: options.zoomDuration,\n      })\n    );\n  }\n\n  const keyboard = options.keyboard !== undefined ? options.keyboard : true;\n  if (keyboard) {\n    interactions.push(new KeyboardPan());\n    interactions.push(\n      new KeyboardZoom({\n        delta: options.zoomDelta,\n        duration: options.zoomDuration,\n      })\n    );\n  }\n\n  const mouseWheelZoom =\n    options.mouseWheelZoom !== undefined ? options.mouseWheelZoom : true;\n  if (mouseWheelZoom) {\n    interactions.push(\n      new MouseWheelZoom({\n        onFocusOnly: options.onFocusOnly,\n        duration: options.zoomDuration,\n      })\n    );\n  }\n\n  const shiftDragZoom =\n    options.shiftDragZoom !== undefined ? options.shiftDragZoom : true;\n  if (shiftDragZoom) {\n    interactions.push(\n      new DragZoom({\n        duration: options.zoomDuration,\n      })\n    );\n  }\n\n  return interactions;\n}\n","/**\n * @module ol/size\n */\n\n/**\n * An array of numbers representing a size: `[width, height]`.\n * @typedef {Array<number>} Size\n * @api\n */\n\n/**\n * Returns a buffered size.\n * @param {Size} size Size.\n * @param {number} num The amount by which to buffer.\n * @param {Size} [dest] Optional reusable size array.\n * @return {Size} The buffered size.\n */\nexport function buffer(size, num, dest) {\n  if (dest === undefined) {\n    dest = [0, 0];\n  }\n  dest[0] = size[0] + 2 * num;\n  dest[1] = size[1] + 2 * num;\n  return dest;\n}\n\n/**\n * Determines if a size has a positive area.\n * @param {Size} size The size to test.\n * @return {boolean} The size has a positive area.\n */\nexport function hasArea(size) {\n  return size[0] > 0 && size[1] > 0;\n}\n\n/**\n * Returns a size scaled by a ratio. The result will be an array of integers.\n * @param {Size} size Size.\n * @param {number} ratio Ratio.\n * @param {Size} [dest] Optional reusable size array.\n * @return {Size} The scaled size.\n */\nexport function scale(size, ratio, dest) {\n  if (dest === undefined) {\n    dest = [0, 0];\n  }\n  dest[0] = (size[0] * ratio + 0.5) | 0;\n  dest[1] = (size[1] * ratio + 0.5) | 0;\n  return dest;\n}\n\n/**\n * Returns an `Size` array for the passed in number (meaning: square) or\n * `Size` array.\n * (meaning: non-square),\n * @param {number|Size} size Width and height.\n * @param {Size} [dest] Optional reusable size array.\n * @return {Size} Size.\n * @api\n */\nexport function toSize(size, dest) {\n  if (Array.isArray(size)) {\n    return size;\n  }\n  if (dest === undefined) {\n    dest = [size, size];\n  } else {\n    dest[0] = size;\n    dest[1] = size;\n  }\n  return dest;\n}\n","/**\n * @module ol/Map\n */\nimport BaseObject from './Object.js';\nimport Collection from './Collection.js';\nimport CollectionEventType from './CollectionEventType.js';\nimport CompositeMapRenderer from './renderer/Composite.js';\nimport EventType from './events/EventType.js';\nimport Layer from './layer/Layer.js';\nimport LayerGroup, {GroupEvent} from './layer/Group.js';\nimport MapBrowserEvent from './MapBrowserEvent.js';\nimport MapBrowserEventHandler from './MapBrowserEventHandler.js';\nimport MapBrowserEventType from './MapBrowserEventType.js';\nimport MapEvent from './MapEvent.js';\nimport MapEventType from './MapEventType.js';\nimport MapProperty from './MapProperty.js';\nimport ObjectEventType from './ObjectEventType.js';\nimport PointerEventType from './pointer/EventType.js';\nimport RenderEventType from './render/EventType.js';\nimport TileQueue, {getTilePriority} from './TileQueue.js';\nimport View from './View.js';\nimport ViewHint from './ViewHint.js';\nimport {DEVICE_PIXEL_RATIO, PASSIVE_EVENT_LISTENERS} from './has.js';\nimport {TRUE} from './functions.js';\nimport {\n  apply as applyTransform,\n  create as createTransform,\n} from './transform.js';\nimport {assert} from './asserts.js';\nimport {\n  clone,\n  createOrUpdateEmpty,\n  equals as equalsExtent,\n  getForViewAndSize,\n  isEmpty,\n} from './extent.js';\nimport {defaults as defaultControls} from './control/defaults.js';\nimport {defaults as defaultInteractions} from './interaction/defaults.js';\nimport {equals} from './array.js';\nimport {fromUserCoordinate, toUserCoordinate} from './proj.js';\nimport {getUid} from './util.js';\nimport {hasArea} from './size.js';\nimport {listen, unlistenByKey} from './events.js';\nimport {removeNode} from './dom.js';\nimport {warn} from './console.js';\n\n/**\n * State of the current frame. Only `pixelRatio`, `time` and `viewState` should\n * be used in applications.\n * @typedef {Object} FrameState\n * @property {number} pixelRatio The pixel ratio of the frame.\n * @property {number} time The time when rendering of the frame was requested.\n * @property {import(\"./View.js\").State} viewState The state of the current view.\n * @property {boolean} animate Animate.\n * @property {import(\"./transform.js\").Transform} coordinateToPixelTransform CoordinateToPixelTransform.\n * @property {import(\"rbush\").default} declutterTree DeclutterTree.\n * @property {null|import(\"./extent.js\").Extent} extent Extent (in view projection coordinates).\n * @property {import(\"./extent.js\").Extent} [nextExtent] Next extent during an animation series.\n * @property {number} index Index.\n * @property {Array<import(\"./layer/Layer.js\").State>} layerStatesArray LayerStatesArray.\n * @property {number} layerIndex LayerIndex.\n * @property {import(\"./transform.js\").Transform} pixelToCoordinateTransform PixelToCoordinateTransform.\n * @property {Array<PostRenderFunction>} postRenderFunctions PostRenderFunctions.\n * @property {import(\"./size.js\").Size} size Size.\n * @property {TileQueue} tileQueue TileQueue.\n * @property {!Object<string, Object<string, boolean>>} usedTiles UsedTiles.\n * @property {Array<number>} viewHints ViewHints.\n * @property {!Object<string, Object<string, boolean>>} wantedTiles WantedTiles.\n * @property {string} mapId The id of the map.\n * @property {Object<string, boolean>} renderTargets Identifiers of previously rendered elements.\n */\n\n/**\n * @typedef {function(Map, ?FrameState): any} PostRenderFunction\n */\n\n/**\n * @typedef {Object} AtPixelOptions\n * @property {undefined|function(import(\"./layer/Layer.js\").default<import(\"./source/Source\").default>): boolean} [layerFilter] Layer filter\n * function. The filter function will receive one argument, the\n * {@link module:ol/layer/Layer~Layer layer-candidate} and it should return a boolean value.\n * Only layers which are visible and for which this function returns `true`\n * will be tested for features. By default, all visible layers will be tested.\n * @property {number} [hitTolerance=0] Hit-detection tolerance in css pixels. Pixels\n * inside the radius around the given position will be checked for features.\n * @property {boolean} [checkWrapped=true] Check-Wrapped Will check for wrapped geometries inside the range of\n *   +/- 1 world width. Works only if a projection is used that can be wrapped.\n */\n\n/**\n * @typedef {Object} MapOptionsInternal\n * @property {Collection<import(\"./control/Control.js\").default>} [controls] Controls.\n * @property {Collection<import(\"./interaction/Interaction.js\").default>} [interactions] Interactions.\n * @property {HTMLElement|Document} keyboardEventTarget KeyboardEventTarget.\n * @property {Collection<import(\"./Overlay.js\").default>} overlays Overlays.\n * @property {Object<string, *>} values Values.\n */\n\n/**\n * @typedef {import(\"./ObjectEventType\").Types|'change:layergroup'|'change:size'|'change:target'|'change:view'} MapObjectEventTypes\n */\n\n/***\n * @template Return\n * @typedef {import(\"./Observable\").OnSignature<import(\"./Observable\").EventTypes, import(\"./events/Event.js\").default, Return> &\n *    import(\"./Observable\").OnSignature<MapObjectEventTypes, import(\"./Object\").ObjectEvent, Return> &\n *    import(\"./Observable\").OnSignature<import(\"./MapBrowserEventType\").Types, import(\"./MapBrowserEvent\").default, Return> &\n *    import(\"./Observable\").OnSignature<import(\"./MapEventType\").Types, import(\"./MapEvent\").default, Return> &\n *    import(\"./Observable\").OnSignature<import(\"./render/EventType\").MapRenderEventTypes, import(\"./render/Event\").default, Return> &\n *    import(\"./Observable\").CombinedOnSignature<import(\"./Observable\").EventTypes|MapObjectEventTypes|\n *      import(\"./MapBrowserEventType\").Types|import(\"./MapEventType\").Types|\n *      import(\"./render/EventType\").MapRenderEventTypes, Return>} MapEventHandler\n */\n\n/**\n * Object literal with config options for the map.\n * @typedef {Object} MapOptions\n * @property {Collection<import(\"./control/Control.js\").default>|Array<import(\"./control/Control.js\").default>} [controls]\n * Controls initially added to the map. If not specified,\n * {@link module:ol/control/defaults.defaults} is used.\n * @property {number} [pixelRatio=window.devicePixelRatio] The ratio between\n * physical pixels and device-independent pixels (dips) on the device.\n * @property {Collection<import(\"./interaction/Interaction.js\").default>|Array<import(\"./interaction/Interaction.js\").default>} [interactions]\n * Interactions that are initially added to the map. If not specified,\n * {@link module:ol/interaction/defaults.defaults} is used.\n * @property {HTMLElement|Document|string} [keyboardEventTarget] The element to\n * listen to keyboard events on. This determines when the `KeyboardPan` and\n * `KeyboardZoom` interactions trigger. For example, if this option is set to\n * `document` the keyboard interactions will always trigger. If this option is\n * not specified, the element the library listens to keyboard events on is the\n * map target (i.e. the user-provided div for the map). If this is not\n * `document`, the target element needs to be focused for key events to be\n * emitted, requiring that the target element has a `tabindex` attribute.\n * @property {Array<import(\"./layer/Base.js\").default>|Collection<import(\"./layer/Base.js\").default>|LayerGroup} [layers]\n * Layers. If this is not defined, a map with no layers will be rendered. Note\n * that layers are rendered in the order supplied, so if you want, for example,\n * a vector layer to appear on top of a tile layer, it must come after the tile\n * layer.\n * @property {number} [maxTilesLoading=16] Maximum number tiles to load\n * simultaneously.\n * @property {number} [moveTolerance=1] The minimum distance in pixels the\n * cursor must move to be detected as a map move event instead of a click.\n * Increasing this value can make it easier to click on the map.\n * @property {Collection<import(\"./Overlay.js\").default>|Array<import(\"./Overlay.js\").default>} [overlays]\n * Overlays initially added to the map. By default, no overlays are added.\n * @property {HTMLElement|string} [target] The container for the map, either the\n * element itself or the `id` of the element. If not specified at construction\n * time, {@link module:ol/Map~Map#setTarget} must be called for the map to be\n * rendered. If passed by element, the container can be in a secondary document.\n * **Note:** CSS `transform` support for the target element is limited to `scale`.\n * @property {View|Promise<import(\"./View.js\").ViewOptions>} [view] The map's view.  No layer sources will be\n * fetched unless this is specified at construction time or through\n * {@link module:ol/Map~Map#setView}.\n */\n\n/**\n * @param {import(\"./layer/Base.js\").default} layer Layer.\n */\nfunction removeLayerMapProperty(layer) {\n  if (layer instanceof Layer) {\n    layer.setMapInternal(null);\n    return;\n  }\n  if (layer instanceof LayerGroup) {\n    layer.getLayers().forEach(removeLayerMapProperty);\n  }\n}\n\n/**\n * @param {import(\"./layer/Base.js\").default} layer Layer.\n * @param {Map} map Map.\n */\nfunction setLayerMapProperty(layer, map) {\n  if (layer instanceof Layer) {\n    layer.setMapInternal(map);\n    return;\n  }\n  if (layer instanceof LayerGroup) {\n    const layers = layer.getLayers().getArray();\n    for (let i = 0, ii = layers.length; i < ii; ++i) {\n      setLayerMapProperty(layers[i], map);\n    }\n  }\n}\n\n/**\n * @classdesc\n * The map is the core component of OpenLayers. For a map to render, a view,\n * one or more layers, and a target container are needed:\n *\n *     import Map from 'ol/Map.js';\n *     import View from 'ol/View.js';\n *     import TileLayer from 'ol/layer/Tile.js';\n *     import OSM from 'ol/source/OSM.js';\n *\n *     const map = new Map({\n *       view: new View({\n *         center: [0, 0],\n *         zoom: 1,\n *       }),\n *       layers: [\n *         new TileLayer({\n *           source: new OSM(),\n *         }),\n *       ],\n *       target: 'map',\n *     });\n *\n * The above snippet creates a map using a {@link module:ol/layer/Tile~TileLayer} to\n * display {@link module:ol/source/OSM~OSM} OSM data and render it to a DOM\n * element with the id `map`.\n *\n * The constructor places a viewport container (with CSS class name\n * `ol-viewport`) in the target element (see `getViewport()`), and then two\n * further elements within the viewport: one with CSS class name\n * `ol-overlaycontainer-stopevent` for controls and some overlays, and one with\n * CSS class name `ol-overlaycontainer` for other overlays (see the `stopEvent`\n * option of {@link module:ol/Overlay~Overlay} for the difference). The map\n * itself is placed in a further element within the viewport.\n *\n * Layers are stored as a {@link module:ol/Collection~Collection} in\n * layerGroups. A top-level group is provided by the library. This is what is\n * accessed by `getLayerGroup` and `setLayerGroup`. Layers entered in the\n * options are added to this group, and `addLayer` and `removeLayer` change the\n * layer collection in the group. `getLayers` is a convenience function for\n * `getLayerGroup().getLayers()`. Note that {@link module:ol/layer/Group~LayerGroup}\n * is a subclass of {@link module:ol/layer/Base~BaseLayer}, so layers entered in the\n * options or added with `addLayer` can be groups, which can contain further\n * groups, and so on.\n *\n * @fires import(\"./MapBrowserEvent.js\").MapBrowserEvent\n * @fires import(\"./MapEvent.js\").MapEvent\n * @fires import(\"./render/Event.js\").default#precompose\n * @fires import(\"./render/Event.js\").default#postcompose\n * @fires import(\"./render/Event.js\").default#rendercomplete\n * @api\n */\nclass Map extends BaseObject {\n  /**\n   * @param {MapOptions} [options] Map options.\n   */\n  constructor(options) {\n    super();\n\n    options = options || {};\n\n    /***\n     * @type {MapEventHandler<import(\"./events\").EventsKey>}\n     */\n    this.on;\n\n    /***\n     * @type {MapEventHandler<import(\"./events\").EventsKey>}\n     */\n    this.once;\n\n    /***\n     * @type {MapEventHandler<void>}\n     */\n    this.un;\n\n    const optionsInternal = createOptionsInternal(options);\n\n    /**\n     * @private\n     * @type {boolean|undefined}\n     */\n    this.renderComplete_;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.loaded_ = true;\n\n    /** @private */\n    this.boundHandleBrowserEvent_ = this.handleBrowserEvent.bind(this);\n\n    /**\n     * @type {number}\n     * @private\n     */\n    this.maxTilesLoading_ =\n      options.maxTilesLoading !== undefined ? options.maxTilesLoading : 16;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.pixelRatio_ =\n      options.pixelRatio !== undefined\n        ? options.pixelRatio\n        : DEVICE_PIXEL_RATIO;\n\n    /**\n     * @private\n     * @type {*}\n     */\n    this.postRenderTimeoutHandle_;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.animationDelayKey_;\n\n    /**\n     * @private\n     */\n    this.animationDelay_ = this.animationDelay_.bind(this);\n\n    /**\n     * @private\n     * @type {import(\"./transform.js\").Transform}\n     */\n    this.coordinateToPixelTransform_ = createTransform();\n\n    /**\n     * @private\n     * @type {import(\"./transform.js\").Transform}\n     */\n    this.pixelToCoordinateTransform_ = createTransform();\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.frameIndex_ = 0;\n\n    /**\n     * @private\n     * @type {?FrameState}\n     */\n    this.frameState_ = null;\n\n    /**\n     * The extent at the previous 'moveend' event.\n     * @private\n     * @type {import(\"./extent.js\").Extent}\n     */\n    this.previousExtent_ = null;\n\n    /**\n     * @private\n     * @type {?import(\"./events.js\").EventsKey}\n     */\n    this.viewPropertyListenerKey_ = null;\n\n    /**\n     * @private\n     * @type {?import(\"./events.js\").EventsKey}\n     */\n    this.viewChangeListenerKey_ = null;\n\n    /**\n     * @private\n     * @type {?Array<import(\"./events.js\").EventsKey>}\n     */\n    this.layerGroupPropertyListenerKeys_ = null;\n\n    /**\n     * @private\n     * @type {!HTMLElement}\n     */\n    this.viewport_ = document.createElement('div');\n    this.viewport_.className =\n      'ol-viewport' + ('ontouchstart' in window ? ' ol-touch' : '');\n    this.viewport_.style.position = 'relative';\n    this.viewport_.style.overflow = 'hidden';\n    this.viewport_.style.width = '100%';\n    this.viewport_.style.height = '100%';\n\n    /**\n     * @private\n     * @type {!HTMLElement}\n     */\n    this.overlayContainer_ = document.createElement('div');\n    this.overlayContainer_.style.position = 'absolute';\n    this.overlayContainer_.style.zIndex = '0';\n    this.overlayContainer_.style.width = '100%';\n    this.overlayContainer_.style.height = '100%';\n    this.overlayContainer_.style.pointerEvents = 'none';\n    this.overlayContainer_.className = 'ol-overlaycontainer';\n    this.viewport_.appendChild(this.overlayContainer_);\n\n    /**\n     * @private\n     * @type {!HTMLElement}\n     */\n    this.overlayContainerStopEvent_ = document.createElement('div');\n    this.overlayContainerStopEvent_.style.position = 'absolute';\n    this.overlayContainerStopEvent_.style.zIndex = '0';\n    this.overlayContainerStopEvent_.style.width = '100%';\n    this.overlayContainerStopEvent_.style.height = '100%';\n    this.overlayContainerStopEvent_.style.pointerEvents = 'none';\n    this.overlayContainerStopEvent_.className = 'ol-overlaycontainer-stopevent';\n    this.viewport_.appendChild(this.overlayContainerStopEvent_);\n\n    /**\n     * @private\n     * @type {MapBrowserEventHandler}\n     */\n    this.mapBrowserEventHandler_ = null;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.moveTolerance_ = options.moveTolerance;\n\n    /**\n     * @private\n     * @type {HTMLElement|Document}\n     */\n    this.keyboardEventTarget_ = optionsInternal.keyboardEventTarget;\n\n    /**\n     * @private\n     * @type {?Array<import(\"./events.js\").EventsKey>}\n     */\n    this.targetChangeHandlerKeys_ = null;\n\n    /**\n     * @private\n     * @type {HTMLElement|null}\n     */\n    this.targetElement_ = null;\n\n    /**\n     * @type {ResizeObserver}\n     */\n    this.resizeObserver_ = new ResizeObserver(() => this.updateSize());\n\n    /**\n     * @type {Collection<import(\"./control/Control.js\").default>}\n     * @protected\n     */\n    this.controls = optionsInternal.controls || defaultControls();\n\n    /**\n     * @type {Collection<import(\"./interaction/Interaction.js\").default>}\n     * @protected\n     */\n    this.interactions =\n      optionsInternal.interactions ||\n      defaultInteractions({\n        onFocusOnly: true,\n      });\n\n    /**\n     * @type {Collection<import(\"./Overlay.js\").default>}\n     * @private\n     */\n    this.overlays_ = optionsInternal.overlays;\n\n    /**\n     * A lookup of overlays by id.\n     * @private\n     * @type {Object<string, import(\"./Overlay.js\").default>}\n     */\n    this.overlayIdIndex_ = {};\n\n    /**\n     * @type {import(\"./renderer/Map.js\").default|null}\n     * @private\n     */\n    this.renderer_ = null;\n\n    /**\n     * @private\n     * @type {!Array<PostRenderFunction>}\n     */\n    this.postRenderFunctions_ = [];\n\n    /**\n     * @private\n     * @type {TileQueue}\n     */\n    this.tileQueue_ = new TileQueue(\n      this.getTilePriority.bind(this),\n      this.handleTileChange_.bind(this)\n    );\n\n    this.addChangeListener(\n      MapProperty.LAYERGROUP,\n      this.handleLayerGroupChanged_\n    );\n    this.addChangeListener(MapProperty.VIEW, this.handleViewChanged_);\n    this.addChangeListener(MapProperty.SIZE, this.handleSizeChanged_);\n    this.addChangeListener(MapProperty.TARGET, this.handleTargetChanged_);\n\n    // setProperties will trigger the rendering of the map if the map\n    // is \"defined\" already.\n    this.setProperties(optionsInternal.values);\n\n    const map = this;\n    if (options.view && !(options.view instanceof View)) {\n      options.view.then(function (viewOptions) {\n        map.setView(new View(viewOptions));\n      });\n    }\n\n    this.controls.addEventListener(\n      CollectionEventType.ADD,\n      /**\n       * @param {import(\"./Collection.js\").CollectionEvent<import(\"./control/Control.js\").default>} event CollectionEvent\n       */\n      (event) => {\n        event.element.setMap(this);\n      }\n    );\n\n    this.controls.addEventListener(\n      CollectionEventType.REMOVE,\n      /**\n       * @param {import(\"./Collection.js\").CollectionEvent<import(\"./control/Control.js\").default>} event CollectionEvent.\n       */\n      (event) => {\n        event.element.setMap(null);\n      }\n    );\n\n    this.interactions.addEventListener(\n      CollectionEventType.ADD,\n      /**\n       * @param {import(\"./Collection.js\").CollectionEvent<import(\"./interaction/Interaction.js\").default>} event CollectionEvent.\n       */\n      (event) => {\n        event.element.setMap(this);\n      }\n    );\n\n    this.interactions.addEventListener(\n      CollectionEventType.REMOVE,\n      /**\n       * @param {import(\"./Collection.js\").CollectionEvent<import(\"./interaction/Interaction.js\").default>} event CollectionEvent.\n       */\n      (event) => {\n        event.element.setMap(null);\n      }\n    );\n\n    this.overlays_.addEventListener(\n      CollectionEventType.ADD,\n      /**\n       * @param {import(\"./Collection.js\").CollectionEvent<import(\"./Overlay.js\").default>} event CollectionEvent.\n       */\n      (event) => {\n        this.addOverlayInternal_(event.element);\n      }\n    );\n\n    this.overlays_.addEventListener(\n      CollectionEventType.REMOVE,\n      /**\n       * @param {import(\"./Collection.js\").CollectionEvent<import(\"./Overlay.js\").default>} event CollectionEvent.\n       */\n      (event) => {\n        const id = event.element.getId();\n        if (id !== undefined) {\n          delete this.overlayIdIndex_[id.toString()];\n        }\n        event.element.setMap(null);\n      }\n    );\n\n    this.controls.forEach(\n      /**\n       * @param {import(\"./control/Control.js\").default} control Control.\n       */\n      (control) => {\n        control.setMap(this);\n      }\n    );\n\n    this.interactions.forEach(\n      /**\n       * @param {import(\"./interaction/Interaction.js\").default} interaction Interaction.\n       */\n      (interaction) => {\n        interaction.setMap(this);\n      }\n    );\n\n    this.overlays_.forEach(this.addOverlayInternal_.bind(this));\n  }\n\n  /**\n   * Add the given control to the map.\n   * @param {import(\"./control/Control.js\").default} control Control.\n   * @api\n   */\n  addControl(control) {\n    this.getControls().push(control);\n  }\n\n  /**\n   * Add the given interaction to the map. If you want to add an interaction\n   * at another point of the collection use `getInteractions()` and the methods\n   * available on {@link module:ol/Collection~Collection}. This can be used to\n   * stop the event propagation from the handleEvent function. The interactions\n   * get to handle the events in the reverse order of this collection.\n   * @param {import(\"./interaction/Interaction.js\").default} interaction Interaction to add.\n   * @api\n   */\n  addInteraction(interaction) {\n    this.getInteractions().push(interaction);\n  }\n\n  /**\n   * Adds the given layer to the top of this map. If you want to add a layer\n   * elsewhere in the stack, use `getLayers()` and the methods available on\n   * {@link module:ol/Collection~Collection}.\n   * @param {import(\"./layer/Base.js\").default} layer Layer.\n   * @api\n   */\n  addLayer(layer) {\n    const layers = this.getLayerGroup().getLayers();\n    layers.push(layer);\n  }\n\n  /**\n   * @param {import(\"./layer/Group.js\").GroupEvent} event The layer add event.\n   * @private\n   */\n  handleLayerAdd_(event) {\n    setLayerMapProperty(event.layer, this);\n  }\n\n  /**\n   * Add the given overlay to the map.\n   * @param {import(\"./Overlay.js\").default} overlay Overlay.\n   * @api\n   */\n  addOverlay(overlay) {\n    this.getOverlays().push(overlay);\n  }\n\n  /**\n   * This deals with map's overlay collection changes.\n   * @param {import(\"./Overlay.js\").default} overlay Overlay.\n   * @private\n   */\n  addOverlayInternal_(overlay) {\n    const id = overlay.getId();\n    if (id !== undefined) {\n      this.overlayIdIndex_[id.toString()] = overlay;\n    }\n    overlay.setMap(this);\n  }\n\n  /**\n   *\n   * Clean up.\n   */\n  disposeInternal() {\n    this.controls.clear();\n    this.interactions.clear();\n    this.overlays_.clear();\n    this.resizeObserver_.disconnect();\n    this.setTarget(null);\n    super.disposeInternal();\n  }\n\n  /**\n   * Detect features that intersect a pixel on the viewport, and execute a\n   * callback with each intersecting feature. Layers included in the detection can\n   * be configured through the `layerFilter` option in `options`.\n   * @param {import(\"./pixel.js\").Pixel} pixel Pixel.\n   * @param {function(import(\"./Feature.js\").FeatureLike, import(\"./layer/Layer.js\").default<import(\"./source/Source\").default>, import(\"./geom/SimpleGeometry.js\").default): T} callback Feature callback. The callback will be\n   *     called with two arguments. The first argument is one\n   *     {@link module:ol/Feature~Feature feature} or\n   *     {@link module:ol/render/Feature~RenderFeature render feature} at the pixel, the second is\n   *     the {@link module:ol/layer/Layer~Layer layer} of the feature and will be null for\n   *     unmanaged layers. To stop detection, callback functions can return a\n   *     truthy value.\n   * @param {AtPixelOptions} [options] Optional options.\n   * @return {T|undefined} Callback result, i.e. the return value of last\n   * callback execution, or the first truthy callback return value.\n   * @template T\n   * @api\n   */\n  forEachFeatureAtPixel(pixel, callback, options) {\n    if (!this.frameState_ || !this.renderer_) {\n      return;\n    }\n    const coordinate = this.getCoordinateFromPixelInternal(pixel);\n    options = options !== undefined ? options : {};\n    const hitTolerance =\n      options.hitTolerance !== undefined ? options.hitTolerance : 0;\n    const layerFilter =\n      options.layerFilter !== undefined ? options.layerFilter : TRUE;\n    const checkWrapped = options.checkWrapped !== false;\n    return this.renderer_.forEachFeatureAtCoordinate(\n      coordinate,\n      this.frameState_,\n      hitTolerance,\n      checkWrapped,\n      callback,\n      null,\n      layerFilter,\n      null\n    );\n  }\n\n  /**\n   * Get all features that intersect a pixel on the viewport.\n   * @param {import(\"./pixel.js\").Pixel} pixel Pixel.\n   * @param {AtPixelOptions} [options] Optional options.\n   * @return {Array<import(\"./Feature.js\").FeatureLike>} The detected features or\n   * an empty array if none were found.\n   * @api\n   */\n  getFeaturesAtPixel(pixel, options) {\n    const features = [];\n    this.forEachFeatureAtPixel(\n      pixel,\n      function (feature) {\n        features.push(feature);\n      },\n      options\n    );\n    return features;\n  }\n\n  /**\n   * Get all layers from all layer groups.\n   * @return {Array<import(\"./layer/Layer.js\").default>} Layers.\n   * @api\n   */\n  getAllLayers() {\n    const layers = [];\n    function addLayersFrom(layerGroup) {\n      layerGroup.forEach(function (layer) {\n        if (layer instanceof LayerGroup) {\n          addLayersFrom(layer.getLayers());\n        } else {\n          layers.push(layer);\n        }\n      });\n    }\n    addLayersFrom(this.getLayers());\n    return layers;\n  }\n\n  /**\n   * Detect if features intersect a pixel on the viewport. Layers included in the\n   * detection can be configured through the `layerFilter` option.\n   * @param {import(\"./pixel.js\").Pixel} pixel Pixel.\n   * @param {AtPixelOptions} [options] Optional options.\n   * @return {boolean} Is there a feature at the given pixel?\n   * @api\n   */\n  hasFeatureAtPixel(pixel, options) {\n    if (!this.frameState_ || !this.renderer_) {\n      return false;\n    }\n    const coordinate = this.getCoordinateFromPixelInternal(pixel);\n    options = options !== undefined ? options : {};\n    const layerFilter =\n      options.layerFilter !== undefined ? options.layerFilter : TRUE;\n    const hitTolerance =\n      options.hitTolerance !== undefined ? options.hitTolerance : 0;\n    const checkWrapped = options.checkWrapped !== false;\n    return this.renderer_.hasFeatureAtCoordinate(\n      coordinate,\n      this.frameState_,\n      hitTolerance,\n      checkWrapped,\n      layerFilter,\n      null\n    );\n  }\n\n  /**\n   * Returns the coordinate in user projection for a browser event.\n   * @param {MouseEvent} event Event.\n   * @return {import(\"./coordinate.js\").Coordinate} Coordinate.\n   * @api\n   */\n  getEventCoordinate(event) {\n    return this.getCoordinateFromPixel(this.getEventPixel(event));\n  }\n\n  /**\n   * Returns the coordinate in view projection for a browser event.\n   * @param {MouseEvent} event Event.\n   * @return {import(\"./coordinate.js\").Coordinate} Coordinate.\n   */\n  getEventCoordinateInternal(event) {\n    return this.getCoordinateFromPixelInternal(this.getEventPixel(event));\n  }\n\n  /**\n   * Returns the map pixel position for a browser event relative to the viewport.\n   * @param {UIEvent|{clientX: number, clientY: number}} event Event.\n   * @return {import(\"./pixel.js\").Pixel} Pixel.\n   * @api\n   */\n  getEventPixel(event) {\n    const viewport = this.viewport_;\n    const viewportPosition = viewport.getBoundingClientRect();\n    const viewportSize = this.getSize();\n    const scaleX = viewportPosition.width / viewportSize[0];\n    const scaleY = viewportPosition.height / viewportSize[1];\n    const eventPosition =\n      //FIXME Are we really calling this with a TouchEvent anywhere?\n      'changedTouches' in event\n        ? /** @type {TouchEvent} */ (event).changedTouches[0]\n        : /** @type {MouseEvent} */ (event);\n\n    return [\n      (eventPosition.clientX - viewportPosition.left) / scaleX,\n      (eventPosition.clientY - viewportPosition.top) / scaleY,\n    ];\n  }\n\n  /**\n   * Get the target in which this map is rendered.\n   * Note that this returns what is entered as an option or in setTarget:\n   * if that was an element, it returns an element; if a string, it returns that.\n   * @return {HTMLElement|string|undefined} The Element or id of the Element that the\n   *     map is rendered in.\n   * @observable\n   * @api\n   */\n  getTarget() {\n    return /** @type {HTMLElement|string|undefined} */ (\n      this.get(MapProperty.TARGET)\n    );\n  }\n\n  /**\n   * Get the DOM element into which this map is rendered. In contrast to\n   * `getTarget` this method always return an `Element`, or `null` if the\n   * map has no target.\n   * @return {HTMLElement} The element that the map is rendered in.\n   * @api\n   */\n  getTargetElement() {\n    return this.targetElement_;\n  }\n\n  /**\n   * Get the coordinate for a given pixel.  This returns a coordinate in the\n   * user projection.\n   * @param {import(\"./pixel.js\").Pixel} pixel Pixel position in the map viewport.\n   * @return {import(\"./coordinate.js\").Coordinate} The coordinate for the pixel position.\n   * @api\n   */\n  getCoordinateFromPixel(pixel) {\n    return toUserCoordinate(\n      this.getCoordinateFromPixelInternal(pixel),\n      this.getView().getProjection()\n    );\n  }\n\n  /**\n   * Get the coordinate for a given pixel.  This returns a coordinate in the\n   * map view projection.\n   * @param {import(\"./pixel.js\").Pixel} pixel Pixel position in the map viewport.\n   * @return {import(\"./coordinate.js\").Coordinate} The coordinate for the pixel position.\n   */\n  getCoordinateFromPixelInternal(pixel) {\n    const frameState = this.frameState_;\n    if (!frameState) {\n      return null;\n    }\n    return applyTransform(frameState.pixelToCoordinateTransform, pixel.slice());\n  }\n\n  /**\n   * Get the map controls. Modifying this collection changes the controls\n   * associated with the map.\n   * @return {Collection<import(\"./control/Control.js\").default>} Controls.\n   * @api\n   */\n  getControls() {\n    return this.controls;\n  }\n\n  /**\n   * Get the map overlays. Modifying this collection changes the overlays\n   * associated with the map.\n   * @return {Collection<import(\"./Overlay.js\").default>} Overlays.\n   * @api\n   */\n  getOverlays() {\n    return this.overlays_;\n  }\n\n  /**\n   * Get an overlay by its identifier (the value returned by overlay.getId()).\n   * Note that the index treats string and numeric identifiers as the same. So\n   * `map.getOverlayById(2)` will return an overlay with id `'2'` or `2`.\n   * @param {string|number} id Overlay identifier.\n   * @return {import(\"./Overlay.js\").default} Overlay.\n   * @api\n   */\n  getOverlayById(id) {\n    const overlay = this.overlayIdIndex_[id.toString()];\n    return overlay !== undefined ? overlay : null;\n  }\n\n  /**\n   * Get the map interactions. Modifying this collection changes the interactions\n   * associated with the map.\n   *\n   * Interactions are used for e.g. pan, zoom and rotate.\n   * @return {Collection<import(\"./interaction/Interaction.js\").default>} Interactions.\n   * @api\n   */\n  getInteractions() {\n    return this.interactions;\n  }\n\n  /**\n   * Get the layergroup associated with this map.\n   * @return {LayerGroup} A layer group containing the layers in this map.\n   * @observable\n   * @api\n   */\n  getLayerGroup() {\n    return /** @type {LayerGroup} */ (this.get(MapProperty.LAYERGROUP));\n  }\n\n  /**\n   * Clear any existing layers and add layers to the map.\n   * @param {Array<import(\"./layer/Base.js\").default>|Collection<import(\"./layer/Base.js\").default>} layers The layers to be added to the map.\n   * @api\n   */\n  setLayers(layers) {\n    const group = this.getLayerGroup();\n    if (layers instanceof Collection) {\n      group.setLayers(layers);\n      return;\n    }\n\n    const collection = group.getLayers();\n    collection.clear();\n    collection.extend(layers);\n  }\n\n  /**\n   * Get the collection of layers associated with this map.\n   * @return {!Collection<import(\"./layer/Base.js\").default>} Layers.\n   * @api\n   */\n  getLayers() {\n    const layers = this.getLayerGroup().getLayers();\n    return layers;\n  }\n\n  /**\n   * @return {boolean} Layers have sources that are still loading.\n   */\n  getLoadingOrNotReady() {\n    const layerStatesArray = this.getLayerGroup().getLayerStatesArray();\n    for (let i = 0, ii = layerStatesArray.length; i < ii; ++i) {\n      const state = layerStatesArray[i];\n      if (!state.visible) {\n        continue;\n      }\n      const renderer = state.layer.getRenderer();\n      if (renderer && !renderer.ready) {\n        return true;\n      }\n      const source = state.layer.getSource();\n      if (source && source.loading) {\n        return true;\n      }\n    }\n    return false;\n  }\n\n  /**\n   * Get the pixel for a coordinate.  This takes a coordinate in the user\n   * projection and returns the corresponding pixel.\n   * @param {import(\"./coordinate.js\").Coordinate} coordinate A map coordinate.\n   * @return {import(\"./pixel.js\").Pixel} A pixel position in the map viewport.\n   * @api\n   */\n  getPixelFromCoordinate(coordinate) {\n    const viewCoordinate = fromUserCoordinate(\n      coordinate,\n      this.getView().getProjection()\n    );\n    return this.getPixelFromCoordinateInternal(viewCoordinate);\n  }\n\n  /**\n   * Get the pixel for a coordinate.  This takes a coordinate in the map view\n   * projection and returns the corresponding pixel.\n   * @param {import(\"./coordinate.js\").Coordinate} coordinate A map coordinate.\n   * @return {import(\"./pixel.js\").Pixel} A pixel position in the map viewport.\n   */\n  getPixelFromCoordinateInternal(coordinate) {\n    const frameState = this.frameState_;\n    if (!frameState) {\n      return null;\n    }\n    return applyTransform(\n      frameState.coordinateToPixelTransform,\n      coordinate.slice(0, 2)\n    );\n  }\n\n  /**\n   * Get the map renderer.\n   * @return {import(\"./renderer/Map.js\").default|null} Renderer\n   */\n  getRenderer() {\n    return this.renderer_;\n  }\n\n  /**\n   * Get the size of this map.\n   * @return {import(\"./size.js\").Size|undefined} The size in pixels of the map in the DOM.\n   * @observable\n   * @api\n   */\n  getSize() {\n    return /** @type {import(\"./size.js\").Size|undefined} */ (\n      this.get(MapProperty.SIZE)\n    );\n  }\n\n  /**\n   * Get the view associated with this map. A view manages properties such as\n   * center and resolution.\n   * @return {View} The view that controls this map.\n   * @observable\n   * @api\n   */\n  getView() {\n    return /** @type {View} */ (this.get(MapProperty.VIEW));\n  }\n\n  /**\n   * Get the element that serves as the map viewport.\n   * @return {HTMLElement} Viewport.\n   * @api\n   */\n  getViewport() {\n    return this.viewport_;\n  }\n\n  /**\n   * Get the element that serves as the container for overlays.  Elements added to\n   * this container will let mousedown and touchstart events through to the map,\n   * so clicks and gestures on an overlay will trigger {@link module:ol/MapBrowserEvent~MapBrowserEvent}\n   * events.\n   * @return {!HTMLElement} The map's overlay container.\n   */\n  getOverlayContainer() {\n    return this.overlayContainer_;\n  }\n\n  /**\n   * Get the element that serves as a container for overlays that don't allow\n   * event propagation. Elements added to this container won't let mousedown and\n   * touchstart events through to the map, so clicks and gestures on an overlay\n   * don't trigger any {@link module:ol/MapBrowserEvent~MapBrowserEvent}.\n   * @return {!HTMLElement} The map's overlay container that stops events.\n   */\n  getOverlayContainerStopEvent() {\n    return this.overlayContainerStopEvent_;\n  }\n\n  /**\n   * @return {!Document} The document where the map is displayed.\n   */\n  getOwnerDocument() {\n    const targetElement = this.getTargetElement();\n    return targetElement ? targetElement.ownerDocument : document;\n  }\n\n  /**\n   * @param {import(\"./Tile.js\").default} tile Tile.\n   * @param {string} tileSourceKey Tile source key.\n   * @param {import(\"./coordinate.js\").Coordinate} tileCenter Tile center.\n   * @param {number} tileResolution Tile resolution.\n   * @return {number} Tile priority.\n   */\n  getTilePriority(tile, tileSourceKey, tileCenter, tileResolution) {\n    return getTilePriority(\n      this.frameState_,\n      tile,\n      tileSourceKey,\n      tileCenter,\n      tileResolution\n    );\n  }\n\n  /**\n   * @param {UIEvent} browserEvent Browser event.\n   * @param {string} [type] Type.\n   */\n  handleBrowserEvent(browserEvent, type) {\n    type = type || browserEvent.type;\n    const mapBrowserEvent = new MapBrowserEvent(type, this, browserEvent);\n    this.handleMapBrowserEvent(mapBrowserEvent);\n  }\n\n  /**\n   * @param {MapBrowserEvent} mapBrowserEvent The event to handle.\n   */\n  handleMapBrowserEvent(mapBrowserEvent) {\n    if (!this.frameState_) {\n      // With no view defined, we cannot translate pixels into geographical\n      // coordinates so interactions cannot be used.\n      return;\n    }\n    const originalEvent = /** @type {PointerEvent} */ (\n      mapBrowserEvent.originalEvent\n    );\n    const eventType = originalEvent.type;\n    if (\n      eventType === PointerEventType.POINTERDOWN ||\n      eventType === EventType.WHEEL ||\n      eventType === EventType.KEYDOWN\n    ) {\n      const doc = this.getOwnerDocument();\n      const rootNode = this.viewport_.getRootNode\n        ? this.viewport_.getRootNode()\n        : doc;\n      const target = /** @type {Node} */ (originalEvent.target);\n      if (\n        // Abort if the target is a child of the container for elements whose events are not meant\n        // to be handled by map interactions.\n        this.overlayContainerStopEvent_.contains(target) ||\n        // Abort if the event target is a child of the container that is no longer in the page.\n        // It's possible for the target to no longer be in the page if it has been removed in an\n        // event listener, this might happen in a Control that recreates it's content based on\n        // user interaction either manually or via a render in something like https://reactjs.org/\n        !(rootNode === doc ? doc.documentElement : rootNode).contains(target)\n      ) {\n        return;\n      }\n    }\n    mapBrowserEvent.frameState = this.frameState_;\n    if (this.dispatchEvent(mapBrowserEvent) !== false) {\n      const interactionsArray = this.getInteractions().getArray().slice();\n      for (let i = interactionsArray.length - 1; i >= 0; i--) {\n        const interaction = interactionsArray[i];\n        if (\n          interaction.getMap() !== this ||\n          !interaction.getActive() ||\n          !this.getTargetElement()\n        ) {\n          continue;\n        }\n        const cont = interaction.handleEvent(mapBrowserEvent);\n        if (!cont || mapBrowserEvent.propagationStopped) {\n          break;\n        }\n      }\n    }\n  }\n\n  /**\n   * @protected\n   */\n  handlePostRender() {\n    const frameState = this.frameState_;\n\n    // Manage the tile queue\n    // Image loads are expensive and a limited resource, so try to use them\n    // efficiently:\n    // * When the view is static we allow a large number of parallel tile loads\n    //   to complete the frame as quickly as possible.\n    // * When animating or interacting, image loads can cause janks, so we reduce\n    //   the maximum number of loads per frame and limit the number of parallel\n    //   tile loads to remain reactive to view changes and to reduce the chance of\n    //   loading tiles that will quickly disappear from view.\n    const tileQueue = this.tileQueue_;\n    if (!tileQueue.isEmpty()) {\n      let maxTotalLoading = this.maxTilesLoading_;\n      let maxNewLoads = maxTotalLoading;\n      if (frameState) {\n        const hints = frameState.viewHints;\n        if (hints[ViewHint.ANIMATING] || hints[ViewHint.INTERACTING]) {\n          const lowOnFrameBudget = Date.now() - frameState.time > 8;\n          maxTotalLoading = lowOnFrameBudget ? 0 : 8;\n          maxNewLoads = lowOnFrameBudget ? 0 : 2;\n        }\n      }\n      if (tileQueue.getTilesLoading() < maxTotalLoading) {\n        tileQueue.reprioritize(); // FIXME only call if view has changed\n        tileQueue.loadMoreTiles(maxTotalLoading, maxNewLoads);\n      }\n    }\n\n    if (frameState && this.renderer_ && !frameState.animate) {\n      if (this.renderComplete_ === true) {\n        if (this.hasListener(RenderEventType.RENDERCOMPLETE)) {\n          this.renderer_.dispatchRenderEvent(\n            RenderEventType.RENDERCOMPLETE,\n            frameState\n          );\n        }\n        if (this.loaded_ === false) {\n          this.loaded_ = true;\n          this.dispatchEvent(\n            new MapEvent(MapEventType.LOADEND, this, frameState)\n          );\n        }\n      } else if (this.loaded_ === true) {\n        this.loaded_ = false;\n        this.dispatchEvent(\n          new MapEvent(MapEventType.LOADSTART, this, frameState)\n        );\n      }\n    }\n\n    const postRenderFunctions = this.postRenderFunctions_;\n    for (let i = 0, ii = postRenderFunctions.length; i < ii; ++i) {\n      postRenderFunctions[i](this, frameState);\n    }\n    postRenderFunctions.length = 0;\n  }\n\n  /**\n   * @private\n   */\n  handleSizeChanged_() {\n    if (this.getView() && !this.getView().getAnimating()) {\n      this.getView().resolveConstraints(0);\n    }\n\n    this.render();\n  }\n\n  /**\n   * @private\n   */\n  handleTargetChanged_() {\n    if (this.mapBrowserEventHandler_) {\n      for (let i = 0, ii = this.targetChangeHandlerKeys_.length; i < ii; ++i) {\n        unlistenByKey(this.targetChangeHandlerKeys_[i]);\n      }\n      this.targetChangeHandlerKeys_ = null;\n      this.viewport_.removeEventListener(\n        EventType.CONTEXTMENU,\n        this.boundHandleBrowserEvent_\n      );\n      this.viewport_.removeEventListener(\n        EventType.WHEEL,\n        this.boundHandleBrowserEvent_\n      );\n      this.mapBrowserEventHandler_.dispose();\n      this.mapBrowserEventHandler_ = null;\n      removeNode(this.viewport_);\n    }\n\n    if (this.targetElement_) {\n      this.resizeObserver_.unobserve(this.targetElement_);\n      const rootNode = this.targetElement_.getRootNode();\n      if (rootNode instanceof ShadowRoot) {\n        this.resizeObserver_.unobserve(rootNode.host);\n      }\n      this.setSize(undefined);\n    }\n\n    // target may be undefined, null, a string or an Element.\n    // If it's a string we convert it to an Element before proceeding.\n    // If it's not now an Element we remove the viewport from the DOM.\n    // If it's an Element we append the viewport element to it.\n\n    const target = this.getTarget();\n    const targetElement =\n      typeof target === 'string' ? document.getElementById(target) : target;\n    this.targetElement_ = targetElement;\n    if (!targetElement) {\n      if (this.renderer_) {\n        clearTimeout(this.postRenderTimeoutHandle_);\n        this.postRenderTimeoutHandle_ = undefined;\n        this.postRenderFunctions_.length = 0;\n        this.renderer_.dispose();\n        this.renderer_ = null;\n      }\n      if (this.animationDelayKey_) {\n        cancelAnimationFrame(this.animationDelayKey_);\n        this.animationDelayKey_ = undefined;\n      }\n    } else {\n      targetElement.appendChild(this.viewport_);\n      if (!this.renderer_) {\n        this.renderer_ = new CompositeMapRenderer(this);\n      }\n\n      this.mapBrowserEventHandler_ = new MapBrowserEventHandler(\n        this,\n        this.moveTolerance_\n      );\n      for (const key in MapBrowserEventType) {\n        this.mapBrowserEventHandler_.addEventListener(\n          MapBrowserEventType[key],\n          this.handleMapBrowserEvent.bind(this)\n        );\n      }\n      this.viewport_.addEventListener(\n        EventType.CONTEXTMENU,\n        this.boundHandleBrowserEvent_,\n        false\n      );\n      this.viewport_.addEventListener(\n        EventType.WHEEL,\n        this.boundHandleBrowserEvent_,\n        PASSIVE_EVENT_LISTENERS ? {passive: false} : false\n      );\n\n      const keyboardEventTarget = !this.keyboardEventTarget_\n        ? targetElement\n        : this.keyboardEventTarget_;\n      this.targetChangeHandlerKeys_ = [\n        listen(\n          keyboardEventTarget,\n          EventType.KEYDOWN,\n          this.handleBrowserEvent,\n          this\n        ),\n        listen(\n          keyboardEventTarget,\n          EventType.KEYPRESS,\n          this.handleBrowserEvent,\n          this\n        ),\n      ];\n      const rootNode = targetElement.getRootNode();\n      if (rootNode instanceof ShadowRoot) {\n        this.resizeObserver_.observe(rootNode.host);\n      }\n      this.resizeObserver_.observe(targetElement);\n    }\n\n    this.updateSize();\n    // updateSize calls setSize, so no need to call this.render\n    // ourselves here.\n  }\n\n  /**\n   * @private\n   */\n  handleTileChange_() {\n    this.render();\n  }\n\n  /**\n   * @private\n   */\n  handleViewPropertyChanged_() {\n    this.render();\n  }\n\n  /**\n   * @private\n   */\n  handleViewChanged_() {\n    if (this.viewPropertyListenerKey_) {\n      unlistenByKey(this.viewPropertyListenerKey_);\n      this.viewPropertyListenerKey_ = null;\n    }\n    if (this.viewChangeListenerKey_) {\n      unlistenByKey(this.viewChangeListenerKey_);\n      this.viewChangeListenerKey_ = null;\n    }\n    const view = this.getView();\n    if (view) {\n      this.updateViewportSize_();\n\n      this.viewPropertyListenerKey_ = listen(\n        view,\n        ObjectEventType.PROPERTYCHANGE,\n        this.handleViewPropertyChanged_,\n        this\n      );\n      this.viewChangeListenerKey_ = listen(\n        view,\n        EventType.CHANGE,\n        this.handleViewPropertyChanged_,\n        this\n      );\n\n      view.resolveConstraints(0);\n    }\n    this.render();\n  }\n\n  /**\n   * @private\n   */\n  handleLayerGroupChanged_() {\n    if (this.layerGroupPropertyListenerKeys_) {\n      this.layerGroupPropertyListenerKeys_.forEach(unlistenByKey);\n      this.layerGroupPropertyListenerKeys_ = null;\n    }\n    const layerGroup = this.getLayerGroup();\n    if (layerGroup) {\n      this.handleLayerAdd_(new GroupEvent('addlayer', layerGroup));\n      this.layerGroupPropertyListenerKeys_ = [\n        listen(layerGroup, ObjectEventType.PROPERTYCHANGE, this.render, this),\n        listen(layerGroup, EventType.CHANGE, this.render, this),\n        listen(layerGroup, 'addlayer', this.handleLayerAdd_, this),\n        listen(layerGroup, 'removelayer', this.handleLayerRemove_, this),\n      ];\n    }\n    this.render();\n  }\n\n  /**\n   * @return {boolean} Is rendered.\n   */\n  isRendered() {\n    return !!this.frameState_;\n  }\n\n  /**\n   * @private\n   */\n  animationDelay_() {\n    this.animationDelayKey_ = undefined;\n    this.renderFrame_(Date.now());\n  }\n\n  /**\n   * Requests an immediate render in a synchronous manner.\n   * @api\n   */\n  renderSync() {\n    if (this.animationDelayKey_) {\n      cancelAnimationFrame(this.animationDelayKey_);\n    }\n    this.animationDelay_();\n  }\n\n  /**\n   * Redraws all text after new fonts have loaded\n   */\n  redrawText() {\n    const layerStates = this.getLayerGroup().getLayerStatesArray();\n    for (let i = 0, ii = layerStates.length; i < ii; ++i) {\n      const layer = layerStates[i].layer;\n      if (layer.hasRenderer()) {\n        layer.getRenderer().handleFontsChanged();\n      }\n    }\n  }\n\n  /**\n   * Request a map rendering (at the next animation frame).\n   * @api\n   */\n  render() {\n    if (this.renderer_ && this.animationDelayKey_ === undefined) {\n      this.animationDelayKey_ = requestAnimationFrame(this.animationDelay_);\n    }\n  }\n\n  /**\n   * Remove the given control from the map.\n   * @param {import(\"./control/Control.js\").default} control Control.\n   * @return {import(\"./control/Control.js\").default|undefined} The removed control (or undefined\n   *     if the control was not found).\n   * @api\n   */\n  removeControl(control) {\n    return this.getControls().remove(control);\n  }\n\n  /**\n   * Remove the given interaction from the map.\n   * @param {import(\"./interaction/Interaction.js\").default} interaction Interaction to remove.\n   * @return {import(\"./interaction/Interaction.js\").default|undefined} The removed interaction (or\n   *     undefined if the interaction was not found).\n   * @api\n   */\n  removeInteraction(interaction) {\n    return this.getInteractions().remove(interaction);\n  }\n\n  /**\n   * Removes the given layer from the map.\n   * @param {import(\"./layer/Base.js\").default} layer Layer.\n   * @return {import(\"./layer/Base.js\").default|undefined} The removed layer (or undefined if the\n   *     layer was not found).\n   * @api\n   */\n  removeLayer(layer) {\n    const layers = this.getLayerGroup().getLayers();\n    return layers.remove(layer);\n  }\n\n  /**\n   * @param {import(\"./layer/Group.js\").GroupEvent} event The layer remove event.\n   * @private\n   */\n  handleLayerRemove_(event) {\n    removeLayerMapProperty(event.layer);\n  }\n\n  /**\n   * Remove the given overlay from the map.\n   * @param {import(\"./Overlay.js\").default} overlay Overlay.\n   * @return {import(\"./Overlay.js\").default|undefined} The removed overlay (or undefined\n   *     if the overlay was not found).\n   * @api\n   */\n  removeOverlay(overlay) {\n    return this.getOverlays().remove(overlay);\n  }\n\n  /**\n   * @param {number} time Time.\n   * @private\n   */\n  renderFrame_(time) {\n    const size = this.getSize();\n    const view = this.getView();\n    const previousFrameState = this.frameState_;\n    /** @type {?FrameState} */\n    let frameState = null;\n    if (size !== undefined && hasArea(size) && view && view.isDef()) {\n      const viewHints = view.getHints(\n        this.frameState_ ? this.frameState_.viewHints : undefined\n      );\n      const viewState = view.getState();\n      frameState = {\n        animate: false,\n        coordinateToPixelTransform: this.coordinateToPixelTransform_,\n        declutterTree: null,\n        extent: getForViewAndSize(\n          viewState.center,\n          viewState.resolution,\n          viewState.rotation,\n          size\n        ),\n        index: this.frameIndex_++,\n        layerIndex: 0,\n        layerStatesArray: this.getLayerGroup().getLayerStatesArray(),\n        pixelRatio: this.pixelRatio_,\n        pixelToCoordinateTransform: this.pixelToCoordinateTransform_,\n        postRenderFunctions: [],\n        size: size,\n        tileQueue: this.tileQueue_,\n        time: time,\n        usedTiles: {},\n        viewState: viewState,\n        viewHints: viewHints,\n        wantedTiles: {},\n        mapId: getUid(this),\n        renderTargets: {},\n      };\n      if (viewState.nextCenter && viewState.nextResolution) {\n        const rotation = isNaN(viewState.nextRotation)\n          ? viewState.rotation\n          : viewState.nextRotation;\n\n        frameState.nextExtent = getForViewAndSize(\n          viewState.nextCenter,\n          viewState.nextResolution,\n          rotation,\n          size\n        );\n      }\n    }\n\n    this.frameState_ = frameState;\n    this.renderer_.renderFrame(frameState);\n\n    if (frameState) {\n      if (frameState.animate) {\n        this.render();\n      }\n      Array.prototype.push.apply(\n        this.postRenderFunctions_,\n        frameState.postRenderFunctions\n      );\n\n      if (previousFrameState) {\n        const moveStart =\n          !this.previousExtent_ ||\n          (!isEmpty(this.previousExtent_) &&\n            !equalsExtent(frameState.extent, this.previousExtent_));\n        if (moveStart) {\n          this.dispatchEvent(\n            new MapEvent(MapEventType.MOVESTART, this, previousFrameState)\n          );\n          this.previousExtent_ = createOrUpdateEmpty(this.previousExtent_);\n        }\n      }\n\n      const idle =\n        this.previousExtent_ &&\n        !frameState.viewHints[ViewHint.ANIMATING] &&\n        !frameState.viewHints[ViewHint.INTERACTING] &&\n        !equalsExtent(frameState.extent, this.previousExtent_);\n\n      if (idle) {\n        this.dispatchEvent(\n          new MapEvent(MapEventType.MOVEEND, this, frameState)\n        );\n        clone(frameState.extent, this.previousExtent_);\n      }\n    }\n\n    this.dispatchEvent(new MapEvent(MapEventType.POSTRENDER, this, frameState));\n\n    this.renderComplete_ =\n      this.hasListener(MapEventType.LOADSTART) ||\n      this.hasListener(MapEventType.LOADEND) ||\n      this.hasListener(RenderEventType.RENDERCOMPLETE)\n        ? !this.tileQueue_.getTilesLoading() &&\n          !this.tileQueue_.getCount() &&\n          !this.getLoadingOrNotReady()\n        : undefined;\n\n    if (!this.postRenderTimeoutHandle_) {\n      this.postRenderTimeoutHandle_ = setTimeout(() => {\n        this.postRenderTimeoutHandle_ = undefined;\n        this.handlePostRender();\n      }, 0);\n    }\n  }\n\n  /**\n   * Sets the layergroup of this map.\n   * @param {LayerGroup} layerGroup A layer group containing the layers in this map.\n   * @observable\n   * @api\n   */\n  setLayerGroup(layerGroup) {\n    const oldLayerGroup = this.getLayerGroup();\n    if (oldLayerGroup) {\n      this.handleLayerRemove_(new GroupEvent('removelayer', oldLayerGroup));\n    }\n    this.set(MapProperty.LAYERGROUP, layerGroup);\n  }\n\n  /**\n   * Set the size of this map.\n   * @param {import(\"./size.js\").Size|undefined} size The size in pixels of the map in the DOM.\n   * @observable\n   * @api\n   */\n  setSize(size) {\n    this.set(MapProperty.SIZE, size);\n  }\n\n  /**\n   * Set the target element to render this map into.\n   * @param {HTMLElement|string} [target] The Element or id of the Element\n   *     that the map is rendered in.\n   * @observable\n   * @api\n   */\n  setTarget(target) {\n    this.set(MapProperty.TARGET, target);\n  }\n\n  /**\n   * Set the view for this map.\n   * @param {View|Promise<import(\"./View.js\").ViewOptions>} view The view that controls this map.\n   * It is also possible to pass a promise that resolves to options for constructing a view.  This\n   * alternative allows view properties to be resolved by sources or other components that load\n   * view-related metadata.\n   * @observable\n   * @api\n   */\n  setView(view) {\n    if (!view || view instanceof View) {\n      this.set(MapProperty.VIEW, view);\n      return;\n    }\n    this.set(MapProperty.VIEW, new View());\n\n    const map = this;\n    view.then(function (viewOptions) {\n      map.setView(new View(viewOptions));\n    });\n  }\n\n  /**\n   * Force a recalculation of the map viewport size.  This should be called when\n   * third-party code changes the size of the map viewport.\n   * @api\n   */\n  updateSize() {\n    const targetElement = this.getTargetElement();\n\n    let size = undefined;\n    if (targetElement) {\n      const computedStyle = getComputedStyle(targetElement);\n      const width =\n        targetElement.offsetWidth -\n        parseFloat(computedStyle['borderLeftWidth']) -\n        parseFloat(computedStyle['paddingLeft']) -\n        parseFloat(computedStyle['paddingRight']) -\n        parseFloat(computedStyle['borderRightWidth']);\n      const height =\n        targetElement.offsetHeight -\n        parseFloat(computedStyle['borderTopWidth']) -\n        parseFloat(computedStyle['paddingTop']) -\n        parseFloat(computedStyle['paddingBottom']) -\n        parseFloat(computedStyle['borderBottomWidth']);\n      if (!isNaN(width) && !isNaN(height)) {\n        size = [width, height];\n        if (\n          !hasArea(size) &&\n          !!(\n            targetElement.offsetWidth ||\n            targetElement.offsetHeight ||\n            targetElement.getClientRects().length\n          )\n        ) {\n          warn(\n            \"No map visible because the map container's width or height are 0.\"\n          );\n        }\n      }\n    }\n\n    const oldSize = this.getSize();\n    if (size && (!oldSize || !equals(size, oldSize))) {\n      this.setSize(size);\n      this.updateViewportSize_();\n    }\n  }\n\n  /**\n   * Recomputes the viewport size and save it on the view object (if any)\n   * @private\n   */\n  updateViewportSize_() {\n    const view = this.getView();\n    if (view) {\n      let size = undefined;\n      const computedStyle = getComputedStyle(this.viewport_);\n      if (computedStyle.width && computedStyle.height) {\n        size = [\n          parseInt(computedStyle.width, 10),\n          parseInt(computedStyle.height, 10),\n        ];\n      }\n      view.setViewportSize(size);\n    }\n  }\n}\n\n/**\n * @param {MapOptions} options Map options.\n * @return {MapOptionsInternal} Internal map options.\n */\nfunction createOptionsInternal(options) {\n  /**\n   * @type {HTMLElement|Document}\n   */\n  let keyboardEventTarget = null;\n  if (options.keyboardEventTarget !== undefined) {\n    keyboardEventTarget =\n      typeof options.keyboardEventTarget === 'string'\n        ? document.getElementById(options.keyboardEventTarget)\n        : options.keyboardEventTarget;\n  }\n\n  /**\n   * @type {Object<string, *>}\n   */\n  const values = {};\n\n  const layerGroup =\n    options.layers &&\n    typeof (/** @type {?} */ (options.layers).getLayers) === 'function'\n      ? /** @type {LayerGroup} */ (options.layers)\n      : new LayerGroup({\n          layers:\n            /** @type {Collection<import(\"./layer/Base.js\").default>|Array<import(\"./layer/Base.js\").default>} */ (\n              options.layers\n            ),\n        });\n  values[MapProperty.LAYERGROUP] = layerGroup;\n\n  values[MapProperty.TARGET] = options.target;\n\n  values[MapProperty.VIEW] =\n    options.view instanceof View ? options.view : new View();\n\n  /** @type {Collection<import(\"./control/Control.js\").default>} */\n  let controls;\n  if (options.controls !== undefined) {\n    if (Array.isArray(options.controls)) {\n      controls = new Collection(options.controls.slice());\n    } else {\n      assert(\n        typeof (/** @type {?} */ (options.controls).getArray) === 'function',\n        47\n      ); // Expected `controls` to be an array or an `import(\"./Collection.js\").Collection`\n      controls = options.controls;\n    }\n  }\n\n  /** @type {Collection<import(\"./interaction/Interaction\").default>} */\n  let interactions;\n  if (options.interactions !== undefined) {\n    if (Array.isArray(options.interactions)) {\n      interactions = new Collection(options.interactions.slice());\n    } else {\n      assert(\n        typeof (/** @type {?} */ (options.interactions).getArray) ===\n          'function',\n        48\n      ); // Expected `interactions` to be an array or an `import(\"./Collection.js\").Collection`\n      interactions = options.interactions;\n    }\n  }\n\n  /** @type {Collection<import(\"./Overlay.js\").default>} */\n  let overlays;\n  if (options.overlays !== undefined) {\n    if (Array.isArray(options.overlays)) {\n      overlays = new Collection(options.overlays.slice());\n    } else {\n      assert(\n        typeof (/** @type {?} */ (options.overlays).getArray) === 'function',\n        49\n      ); // Expected `overlays` to be an array or an `import(\"./Collection.js\").Collection`\n      overlays = options.overlays;\n    }\n  } else {\n    overlays = new Collection();\n  }\n\n  return {\n    controls: controls,\n    interactions: interactions,\n    keyboardEventTarget: keyboardEventTarget,\n    overlays: overlays,\n    values: values,\n  };\n}\nexport default Map;\n","/**\n * @module ol/Overlay\n */\nimport BaseObject from './Object.js';\nimport MapEventType from './MapEventType.js';\nimport {CLASS_SELECTABLE} from './css.js';\nimport {containsExtent} from './extent.js';\nimport {listen, unlistenByKey} from './events.js';\nimport {outerHeight, outerWidth, removeChildren, removeNode} from './dom.js';\n\n/**\n * @typedef {'bottom-left' | 'bottom-center' | 'bottom-right' | 'center-left' | 'center-center' | 'center-right' | 'top-left' | 'top-center' | 'top-right'} Positioning\n * The overlay position: `'bottom-left'`, `'bottom-center'`,  `'bottom-right'`,\n * `'center-left'`, `'center-center'`, `'center-right'`, `'top-left'`,\n * `'top-center'`, or `'top-right'`.\n */\n\n/**\n * @typedef {Object} Options\n * @property {number|string} [id] Set the overlay id. The overlay id can be used\n * with the {@link module:ol/Map~Map#getOverlayById} method.\n * @property {HTMLElement} [element] The overlay element.\n * @property {Array<number>} [offset=[0, 0]] Offsets in pixels used when positioning\n * the overlay. The first element in the\n * array is the horizontal offset. A positive value shifts the overlay right.\n * The second element in the array is the vertical offset. A positive value\n * shifts the overlay down.\n * @property {import(\"./coordinate.js\").Coordinate} [position] The overlay position\n * in map projection.\n * @property {Positioning} [positioning='top-left'] Defines how\n * the overlay is actually positioned with respect to its `position` property.\n * Possible values are `'bottom-left'`, `'bottom-center'`, `'bottom-right'`,\n * `'center-left'`, `'center-center'`, `'center-right'`, `'top-left'`,\n * `'top-center'`, and `'top-right'`.\n * @property {boolean} [stopEvent=true] Whether event propagation to the map\n * viewport should be stopped. If `true` the overlay is placed in the same\n * container as that of the controls (CSS class name\n * `ol-overlaycontainer-stopevent`); if `false` it is placed in the container\n * with CSS class name specified by the `className` property.\n * @property {boolean} [insertFirst=true] Whether the overlay is inserted first\n * in the overlay container, or appended. If the overlay is placed in the same\n * container as that of the controls (see the `stopEvent` option) you will\n * probably set `insertFirst` to `true` so the overlay is displayed below the\n * controls.\n * @property {PanIntoViewOptions|boolean} [autoPan=false] Pan the map when calling\n * `setPosition`, so that the overlay is entirely visible in the current viewport.\n * @property {string} [className='ol-overlay-container ol-selectable'] CSS class\n * name.\n */\n\n/**\n * @typedef {Object} PanOptions\n * @property {number} [duration=1000] The duration of the animation in\n * milliseconds.\n * @property {function(number):number} [easing] The easing function to use. Can\n * be one from {@link module:ol/easing} or a custom function.\n * Default is {@link module:ol/easing.inAndOut}.\n */\n\n/**\n * @typedef {Object} PanIntoViewOptions\n * @property {PanOptions} [animation={}] The animation parameters for the pan\n * @property {number} [margin=20] The margin (in pixels) between the\n * overlay and the borders of the map when panning into view.\n */\n\n/**\n * @enum {string}\n * @protected\n */\nconst Property = {\n  ELEMENT: 'element',\n  MAP: 'map',\n  OFFSET: 'offset',\n  POSITION: 'position',\n  POSITIONING: 'positioning',\n};\n\n/**\n * @typedef {import(\"./ObjectEventType\").Types|'change:element'|'change:map'|'change:offset'|'change:position'|\n *   'change:positioning'} OverlayObjectEventTypes\n */\n\n/***\n * @template Return\n * @typedef {import(\"./Observable\").OnSignature<import(\"./Observable\").EventTypes, import(\"./events/Event.js\").default, Return> &\n *   import(\"./Observable\").OnSignature<OverlayObjectEventTypes, import(\"./Object\").ObjectEvent, Return> &\n *   import(\"./Observable\").CombinedOnSignature<import(\"./Observable\").EventTypes|OverlayObjectEventTypes, Return>} OverlayOnSignature\n */\n\n/**\n * @classdesc\n * An element to be displayed over the map and attached to a single map\n * location.  Like {@link module:ol/control/Control~Control}, Overlays are\n * visible widgets. Unlike Controls, they are not in a fixed position on the\n * screen, but are tied to a geographical coordinate, so panning the map will\n * move an Overlay but not a Control.\n *\n * Example:\n *\n *     import Overlay from 'ol/Overlay.js';\n *\n *     // ...\n *     const popup = new Overlay({\n *       element: document.getElementById('popup'),\n *     });\n *     popup.setPosition(coordinate);\n *     map.addOverlay(popup);\n *\n * @api\n */\nclass Overlay extends BaseObject {\n  /**\n   * @param {Options} options Overlay options.\n   */\n  constructor(options) {\n    super();\n\n    /***\n     * @type {OverlayOnSignature<import(\"./events\").EventsKey>}\n     */\n    this.on;\n\n    /***\n     * @type {OverlayOnSignature<import(\"./events\").EventsKey>}\n     */\n    this.once;\n\n    /***\n     * @type {OverlayOnSignature<void>}\n     */\n    this.un;\n\n    /**\n     * @protected\n     * @type {Options}\n     */\n    this.options = options;\n\n    /**\n     * @protected\n     * @type {number|string|undefined}\n     */\n    this.id = options.id;\n\n    /**\n     * @protected\n     * @type {boolean}\n     */\n    this.insertFirst =\n      options.insertFirst !== undefined ? options.insertFirst : true;\n\n    /**\n     * @protected\n     * @type {boolean}\n     */\n    this.stopEvent = options.stopEvent !== undefined ? options.stopEvent : true;\n\n    /**\n     * @protected\n     * @type {HTMLElement}\n     */\n    this.element = document.createElement('div');\n    this.element.className =\n      options.className !== undefined\n        ? options.className\n        : 'ol-overlay-container ' + CLASS_SELECTABLE;\n    this.element.style.position = 'absolute';\n    this.element.style.pointerEvents = 'auto';\n\n    /**\n     * @protected\n     * @type {PanIntoViewOptions|undefined}\n     */\n    this.autoPan = options.autoPan === true ? {} : options.autoPan || undefined;\n\n    /**\n     * @protected\n     * @type {{transform_: string,\n     *         visible: boolean}}\n     */\n    this.rendered = {\n      transform_: '',\n      visible: true,\n    };\n\n    /**\n     * @protected\n     * @type {?import(\"./events.js\").EventsKey}\n     */\n    this.mapPostrenderListenerKey = null;\n\n    this.addChangeListener(Property.ELEMENT, this.handleElementChanged);\n    this.addChangeListener(Property.MAP, this.handleMapChanged);\n    this.addChangeListener(Property.OFFSET, this.handleOffsetChanged);\n    this.addChangeListener(Property.POSITION, this.handlePositionChanged);\n    this.addChangeListener(Property.POSITIONING, this.handlePositioningChanged);\n\n    if (options.element !== undefined) {\n      this.setElement(options.element);\n    }\n\n    this.setOffset(options.offset !== undefined ? options.offset : [0, 0]);\n\n    this.setPositioning(options.positioning || 'top-left');\n\n    if (options.position !== undefined) {\n      this.setPosition(options.position);\n    }\n  }\n\n  /**\n   * Get the DOM element of this overlay.\n   * @return {HTMLElement|undefined} The Element containing the overlay.\n   * @observable\n   * @api\n   */\n  getElement() {\n    return /** @type {HTMLElement|undefined} */ (this.get(Property.ELEMENT));\n  }\n\n  /**\n   * Get the overlay identifier which is set on constructor.\n   * @return {number|string|undefined} Id.\n   * @api\n   */\n  getId() {\n    return this.id;\n  }\n\n  /**\n   * Get the map associated with this overlay.\n   * @return {import(\"./Map.js\").default|null} The map that the\n   * overlay is part of.\n   * @observable\n   * @api\n   */\n  getMap() {\n    return /** @type {import(\"./Map.js\").default|null} */ (\n      this.get(Property.MAP) || null\n    );\n  }\n\n  /**\n   * Get the offset of this overlay.\n   * @return {Array<number>} The offset.\n   * @observable\n   * @api\n   */\n  getOffset() {\n    return /** @type {Array<number>} */ (this.get(Property.OFFSET));\n  }\n\n  /**\n   * Get the current position of this overlay.\n   * @return {import(\"./coordinate.js\").Coordinate|undefined} The spatial point that the overlay is\n   *     anchored at.\n   * @observable\n   * @api\n   */\n  getPosition() {\n    return /** @type {import(\"./coordinate.js\").Coordinate|undefined} */ (\n      this.get(Property.POSITION)\n    );\n  }\n\n  /**\n   * Get the current positioning of this overlay.\n   * @return {Positioning} How the overlay is positioned\n   *     relative to its point on the map.\n   * @observable\n   * @api\n   */\n  getPositioning() {\n    return /** @type {Positioning} */ (this.get(Property.POSITIONING));\n  }\n\n  /**\n   * @protected\n   */\n  handleElementChanged() {\n    removeChildren(this.element);\n    const element = this.getElement();\n    if (element) {\n      this.element.appendChild(element);\n    }\n  }\n\n  /**\n   * @protected\n   */\n  handleMapChanged() {\n    if (this.mapPostrenderListenerKey) {\n      removeNode(this.element);\n      unlistenByKey(this.mapPostrenderListenerKey);\n      this.mapPostrenderListenerKey = null;\n    }\n    const map = this.getMap();\n    if (map) {\n      this.mapPostrenderListenerKey = listen(\n        map,\n        MapEventType.POSTRENDER,\n        this.render,\n        this\n      );\n      this.updatePixelPosition();\n      const container = this.stopEvent\n        ? map.getOverlayContainerStopEvent()\n        : map.getOverlayContainer();\n      if (this.insertFirst) {\n        container.insertBefore(this.element, container.childNodes[0] || null);\n      } else {\n        container.appendChild(this.element);\n      }\n      this.performAutoPan();\n    }\n  }\n\n  /**\n   * @protected\n   */\n  render() {\n    this.updatePixelPosition();\n  }\n\n  /**\n   * @protected\n   */\n  handleOffsetChanged() {\n    this.updatePixelPosition();\n  }\n\n  /**\n   * @protected\n   */\n  handlePositionChanged() {\n    this.updatePixelPosition();\n    this.performAutoPan();\n  }\n\n  /**\n   * @protected\n   */\n  handlePositioningChanged() {\n    this.updatePixelPosition();\n  }\n\n  /**\n   * Set the DOM element to be associated with this overlay.\n   * @param {HTMLElement|undefined} element The Element containing the overlay.\n   * @observable\n   * @api\n   */\n  setElement(element) {\n    this.set(Property.ELEMENT, element);\n  }\n\n  /**\n   * Set the map to be associated with this overlay.\n   * @param {import(\"./Map.js\").default|null} map The map that the\n   * overlay is part of. Pass `null` to just remove the overlay from the current map.\n   * @observable\n   * @api\n   */\n  setMap(map) {\n    this.set(Property.MAP, map);\n  }\n\n  /**\n   * Set the offset for this overlay.\n   * @param {Array<number>} offset Offset.\n   * @observable\n   * @api\n   */\n  setOffset(offset) {\n    this.set(Property.OFFSET, offset);\n  }\n\n  /**\n   * Set the position for this overlay. If the position is `undefined` the\n   * overlay is hidden.\n   * @param {import(\"./coordinate.js\").Coordinate|undefined} position The spatial point that the overlay\n   *     is anchored at.\n   * @observable\n   * @api\n   */\n  setPosition(position) {\n    this.set(Property.POSITION, position);\n  }\n\n  /**\n   * Pan the map so that the overlay is entirely visible in the current viewport\n   * (if necessary) using the configured autoPan parameters\n   * @protected\n   */\n  performAutoPan() {\n    if (this.autoPan) {\n      this.panIntoView(this.autoPan);\n    }\n  }\n\n  /**\n   * Pan the map so that the overlay is entirely visible in the current viewport\n   * (if necessary).\n   * @param {PanIntoViewOptions} [panIntoViewOptions] Options for the pan action\n   * @api\n   */\n  panIntoView(panIntoViewOptions) {\n    const map = this.getMap();\n\n    if (!map || !map.getTargetElement() || !this.get(Property.POSITION)) {\n      return;\n    }\n\n    const mapRect = this.getRect(map.getTargetElement(), map.getSize());\n    const element = this.getElement();\n    const overlayRect = this.getRect(element, [\n      outerWidth(element),\n      outerHeight(element),\n    ]);\n\n    panIntoViewOptions = panIntoViewOptions || {};\n\n    const myMargin =\n      panIntoViewOptions.margin === undefined ? 20 : panIntoViewOptions.margin;\n    if (!containsExtent(mapRect, overlayRect)) {\n      // the overlay is not completely inside the viewport, so pan the map\n      const offsetLeft = overlayRect[0] - mapRect[0];\n      const offsetRight = mapRect[2] - overlayRect[2];\n      const offsetTop = overlayRect[1] - mapRect[1];\n      const offsetBottom = mapRect[3] - overlayRect[3];\n\n      const delta = [0, 0];\n      if (offsetLeft < 0) {\n        // move map to the left\n        delta[0] = offsetLeft - myMargin;\n      } else if (offsetRight < 0) {\n        // move map to the right\n        delta[0] = Math.abs(offsetRight) + myMargin;\n      }\n      if (offsetTop < 0) {\n        // move map up\n        delta[1] = offsetTop - myMargin;\n      } else if (offsetBottom < 0) {\n        // move map down\n        delta[1] = Math.abs(offsetBottom) + myMargin;\n      }\n\n      if (delta[0] !== 0 || delta[1] !== 0) {\n        const center = /** @type {import(\"./coordinate.js\").Coordinate} */ (\n          map.getView().getCenterInternal()\n        );\n        const centerPx = map.getPixelFromCoordinateInternal(center);\n        if (!centerPx) {\n          return;\n        }\n        const newCenterPx = [centerPx[0] + delta[0], centerPx[1] + delta[1]];\n\n        const panOptions = panIntoViewOptions.animation || {};\n        map.getView().animateInternal({\n          center: map.getCoordinateFromPixelInternal(newCenterPx),\n          duration: panOptions.duration,\n          easing: panOptions.easing,\n        });\n      }\n    }\n  }\n\n  /**\n   * Get the extent of an element relative to the document\n   * @param {HTMLElement} element The element.\n   * @param {import(\"./size.js\").Size} size The size of the element.\n   * @return {import(\"./extent.js\").Extent} The extent.\n   * @protected\n   */\n  getRect(element, size) {\n    const box = element.getBoundingClientRect();\n    const offsetX = box.left + window.pageXOffset;\n    const offsetY = box.top + window.pageYOffset;\n    return [offsetX, offsetY, offsetX + size[0], offsetY + size[1]];\n  }\n\n  /**\n   * Set the positioning for this overlay.\n   * @param {Positioning} positioning how the overlay is\n   *     positioned relative to its point on the map.\n   * @observable\n   * @api\n   */\n  setPositioning(positioning) {\n    this.set(Property.POSITIONING, positioning);\n  }\n\n  /**\n   * Modify the visibility of the element.\n   * @param {boolean} visible Element visibility.\n   * @protected\n   */\n  setVisible(visible) {\n    if (this.rendered.visible !== visible) {\n      this.element.style.display = visible ? '' : 'none';\n      this.rendered.visible = visible;\n    }\n  }\n\n  /**\n   * Update pixel position.\n   * @protected\n   */\n  updatePixelPosition() {\n    const map = this.getMap();\n    const position = this.getPosition();\n    if (!map || !map.isRendered() || !position) {\n      this.setVisible(false);\n      return;\n    }\n\n    const pixel = map.getPixelFromCoordinate(position);\n    const mapSize = map.getSize();\n    this.updateRenderedPosition(pixel, mapSize);\n  }\n\n  /**\n   * @param {import(\"./pixel.js\").Pixel} pixel The pixel location.\n   * @param {import(\"./size.js\").Size|undefined} mapSize The map size.\n   * @protected\n   */\n  updateRenderedPosition(pixel, mapSize) {\n    const style = this.element.style;\n    const offset = this.getOffset();\n\n    const positioning = this.getPositioning();\n\n    this.setVisible(true);\n\n    const x = Math.round(pixel[0] + offset[0]) + 'px';\n    const y = Math.round(pixel[1] + offset[1]) + 'px';\n    let posX = '0%';\n    let posY = '0%';\n    if (\n      positioning == 'bottom-right' ||\n      positioning == 'center-right' ||\n      positioning == 'top-right'\n    ) {\n      posX = '-100%';\n    } else if (\n      positioning == 'bottom-center' ||\n      positioning == 'center-center' ||\n      positioning == 'top-center'\n    ) {\n      posX = '-50%';\n    }\n    if (\n      positioning == 'bottom-left' ||\n      positioning == 'bottom-center' ||\n      positioning == 'bottom-right'\n    ) {\n      posY = '-100%';\n    } else if (\n      positioning == 'center-left' ||\n      positioning == 'center-center' ||\n      positioning == 'center-right'\n    ) {\n      posY = '-50%';\n    }\n    const transform = `translate(${posX}, ${posY}) translate(${x}, ${y})`;\n    if (this.rendered.transform_ != transform) {\n      this.rendered.transform_ = transform;\n      style.transform = transform;\n    }\n  }\n\n  /**\n   * returns the options this Overlay has been created with\n   * @return {Options} overlay options\n   */\n  getOptions() {\n    return this.options;\n  }\n}\n\nexport default Overlay;\n","/**\n * @module ol/structs/LRUCache\n */\n\nimport {assert} from '../asserts.js';\n\n/**\n * @typedef {Object} Entry\n * @property {string} key_ Key.\n * @property {Object} newer Newer.\n * @property {Object} older Older.\n * @property {*} value_ Value.\n */\n\n/**\n * @classdesc\n * Implements a Least-Recently-Used cache where the keys do not conflict with\n * Object's properties (e.g. 'hasOwnProperty' is not allowed as a key). Expiring\n * items from the cache is the responsibility of the user.\n *\n * @fires import(\"../events/Event.js\").default\n * @template T\n */\nclass LRUCache {\n  /**\n   * @param {number} [highWaterMark] High water mark.\n   */\n  constructor(highWaterMark) {\n    /**\n     * Desired max cache size after expireCache(). If set to 0, no cache entries\n     * will be pruned at all.\n     * @type {number}\n     */\n    this.highWaterMark = highWaterMark !== undefined ? highWaterMark : 2048;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.count_ = 0;\n\n    /**\n     * @private\n     * @type {!Object<string, Entry>}\n     */\n    this.entries_ = {};\n\n    /**\n     * @private\n     * @type {?Entry}\n     */\n    this.oldest_ = null;\n\n    /**\n     * @private\n     * @type {?Entry}\n     */\n    this.newest_ = null;\n  }\n\n  /**\n   * @return {boolean} Can expire cache.\n   */\n  canExpireCache() {\n    return this.highWaterMark > 0 && this.getCount() > this.highWaterMark;\n  }\n\n  /**\n   * Expire the cache.\n   * @param {!Object<string, boolean>} [keep] Keys to keep. To be implemented by subclasses.\n   */\n  expireCache(keep) {\n    while (this.canExpireCache()) {\n      this.pop();\n    }\n  }\n\n  /**\n   * FIXME empty description for jsdoc\n   */\n  clear() {\n    this.count_ = 0;\n    this.entries_ = {};\n    this.oldest_ = null;\n    this.newest_ = null;\n  }\n\n  /**\n   * @param {string} key Key.\n   * @return {boolean} Contains key.\n   */\n  containsKey(key) {\n    return this.entries_.hasOwnProperty(key);\n  }\n\n  /**\n   * @param {function(T, string, LRUCache<T>): ?} f The function\n   *     to call for every entry from the oldest to the newer. This function takes\n   *     3 arguments (the entry value, the entry key and the LRUCache object).\n   *     The return value is ignored.\n   */\n  forEach(f) {\n    let entry = this.oldest_;\n    while (entry) {\n      f(entry.value_, entry.key_, this);\n      entry = entry.newer;\n    }\n  }\n\n  /**\n   * @param {string} key Key.\n   * @param {*} [options] Options (reserved for subclasses).\n   * @return {T} Value.\n   */\n  get(key, options) {\n    const entry = this.entries_[key];\n    assert(entry !== undefined, 15); // Tried to get a value for a key that does not exist in the cache\n    if (entry === this.newest_) {\n      return entry.value_;\n    }\n    if (entry === this.oldest_) {\n      this.oldest_ = /** @type {Entry} */ (this.oldest_.newer);\n      this.oldest_.older = null;\n    } else {\n      entry.newer.older = entry.older;\n      entry.older.newer = entry.newer;\n    }\n    entry.newer = null;\n    entry.older = this.newest_;\n    this.newest_.newer = entry;\n    this.newest_ = entry;\n    return entry.value_;\n  }\n\n  /**\n   * Remove an entry from the cache.\n   * @param {string} key The entry key.\n   * @return {T} The removed entry.\n   */\n  remove(key) {\n    const entry = this.entries_[key];\n    assert(entry !== undefined, 15); // Tried to get a value for a key that does not exist in the cache\n    if (entry === this.newest_) {\n      this.newest_ = /** @type {Entry} */ (entry.older);\n      if (this.newest_) {\n        this.newest_.newer = null;\n      }\n    } else if (entry === this.oldest_) {\n      this.oldest_ = /** @type {Entry} */ (entry.newer);\n      if (this.oldest_) {\n        this.oldest_.older = null;\n      }\n    } else {\n      entry.newer.older = entry.older;\n      entry.older.newer = entry.newer;\n    }\n    delete this.entries_[key];\n    --this.count_;\n    return entry.value_;\n  }\n\n  /**\n   * @return {number} Count.\n   */\n  getCount() {\n    return this.count_;\n  }\n\n  /**\n   * @return {Array<string>} Keys.\n   */\n  getKeys() {\n    const keys = new Array(this.count_);\n    let i = 0;\n    let entry;\n    for (entry = this.newest_; entry; entry = entry.older) {\n      keys[i++] = entry.key_;\n    }\n    return keys;\n  }\n\n  /**\n   * @return {Array<T>} Values.\n   */\n  getValues() {\n    const values = new Array(this.count_);\n    let i = 0;\n    let entry;\n    for (entry = this.newest_; entry; entry = entry.older) {\n      values[i++] = entry.value_;\n    }\n    return values;\n  }\n\n  /**\n   * @return {T} Last value.\n   */\n  peekLast() {\n    return this.oldest_.value_;\n  }\n\n  /**\n   * @return {string} Last key.\n   */\n  peekLastKey() {\n    return this.oldest_.key_;\n  }\n\n  /**\n   * Get the key of the newest item in the cache.  Throws if the cache is empty.\n   * @return {string} The newest key.\n   */\n  peekFirstKey() {\n    return this.newest_.key_;\n  }\n\n  /**\n   * Return an entry without updating least recently used time.\n   * @param {string} key Key.\n   * @return {T} Value.\n   */\n  peek(key) {\n    if (!this.containsKey(key)) {\n      return undefined;\n    }\n    return this.entries_[key].value_;\n  }\n\n  /**\n   * @return {T} value Value.\n   */\n  pop() {\n    const entry = this.oldest_;\n    delete this.entries_[entry.key_];\n    if (entry.newer) {\n      entry.newer.older = null;\n    }\n    this.oldest_ = /** @type {Entry} */ (entry.newer);\n    if (!this.oldest_) {\n      this.newest_ = null;\n    }\n    --this.count_;\n    return entry.value_;\n  }\n\n  /**\n   * @param {string} key Key.\n   * @param {T} value Value.\n   */\n  replace(key, value) {\n    this.get(key); // update `newest_`\n    this.entries_[key].value_ = value;\n  }\n\n  /**\n   * @param {string} key Key.\n   * @param {T} value Value.\n   */\n  set(key, value) {\n    assert(!(key in this.entries_), 16); // Tried to set a value for a key that is used already\n    const entry = {\n      key_: key,\n      newer: null,\n      older: this.newest_,\n      value_: value,\n    };\n    if (!this.newest_) {\n      this.oldest_ = entry;\n    } else {\n      this.newest_.newer = entry;\n    }\n    this.newest_ = entry;\n    this.entries_[key] = entry;\n    ++this.count_;\n  }\n\n  /**\n   * Set a maximum number of entries for the cache.\n   * @param {number} size Cache size.\n   * @api\n   */\n  setSize(size) {\n    this.highWaterMark = size;\n  }\n}\n\nexport default LRUCache;\n","/**\n * @module ol/tilecoord\n */\n\n/**\n * An array of three numbers representing the location of a tile in a tile\n * grid. The order is `z` (zoom level), `x` (column), and `y` (row).\n * @typedef {Array<number>} TileCoord\n * @api\n */\n\n/**\n * @param {number} z Z.\n * @param {number} x X.\n * @param {number} y Y.\n * @param {TileCoord} [tileCoord] Tile coordinate.\n * @return {TileCoord} Tile coordinate.\n */\nexport function createOrUpdate(z, x, y, tileCoord) {\n  if (tileCoord !== undefined) {\n    tileCoord[0] = z;\n    tileCoord[1] = x;\n    tileCoord[2] = y;\n    return tileCoord;\n  }\n  return [z, x, y];\n}\n\n/**\n * @param {number} z Z.\n * @param {number} x X.\n * @param {number} y Y.\n * @return {string} Key.\n */\nexport function getKeyZXY(z, x, y) {\n  return z + '/' + x + '/' + y;\n}\n\n/**\n * Get the key for a tile coord.\n * @param {TileCoord} tileCoord The tile coord.\n * @return {string} Key.\n */\nexport function getKey(tileCoord) {\n  return getKeyZXY(tileCoord[0], tileCoord[1], tileCoord[2]);\n}\n\n/**\n * Get the tile cache key for a tile key obtained through `tile.getKey()`.\n * @param {string} tileKey The tile key.\n * @return {string} The cache key.\n */\nexport function getCacheKeyForTileKey(tileKey) {\n  const [z, x, y] = tileKey\n    .substring(tileKey.lastIndexOf('/') + 1, tileKey.length)\n    .split(',')\n    .map(Number);\n  return getKeyZXY(z, x, y);\n}\n\n/**\n * Get a tile coord given a key.\n * @param {string} key The tile coord key.\n * @return {TileCoord} The tile coord.\n */\nexport function fromKey(key) {\n  return key.split('/').map(Number);\n}\n\n/**\n * @param {TileCoord} tileCoord Tile coord.\n * @return {number} Hash.\n */\nexport function hash(tileCoord) {\n  return (tileCoord[1] << tileCoord[0]) + tileCoord[2];\n}\n\n/**\n * @param {TileCoord} tileCoord Tile coordinate.\n * @param {!import(\"./tilegrid/TileGrid.js\").default} tileGrid Tile grid.\n * @return {boolean} Tile coordinate is within extent and zoom level range.\n */\nexport function withinExtentAndZ(tileCoord, tileGrid) {\n  const z = tileCoord[0];\n  const x = tileCoord[1];\n  const y = tileCoord[2];\n\n  if (tileGrid.getMinZoom() > z || z > tileGrid.getMaxZoom()) {\n    return false;\n  }\n  const tileRange = tileGrid.getFullTileRange(z);\n  if (!tileRange) {\n    return true;\n  }\n  return tileRange.containsXY(x, y);\n}\n","/**\n * @module ol/TileCache\n */\nimport LRUCache from './structs/LRUCache.js';\nimport {fromKey, getKey} from './tilecoord.js';\n\nclass TileCache extends LRUCache {\n  clear() {\n    while (this.getCount() > 0) {\n      this.pop().release();\n    }\n    super.clear();\n  }\n\n  /**\n   * @param {!Object<string, boolean>} usedTiles Used tiles.\n   */\n  expireCache(usedTiles) {\n    while (this.canExpireCache()) {\n      const tile = this.peekLast();\n      if (tile.getKey() in usedTiles) {\n        break;\n      } else {\n        this.pop().release();\n      }\n    }\n  }\n\n  /**\n   * Prune all tiles from the cache that don't have the same z as the newest tile.\n   */\n  pruneExceptNewestZ() {\n    if (this.getCount() === 0) {\n      return;\n    }\n    const key = this.peekFirstKey();\n    const tileCoord = fromKey(key);\n    const z = tileCoord[0];\n    this.forEach((tile) => {\n      if (tile.tileCoord[0] !== z) {\n        this.remove(getKey(tile.tileCoord));\n        tile.release();\n      }\n    });\n  }\n}\n\nexport default TileCache;\n","/**\n * @module ol/TileRange\n */\n\n/**\n * A representation of a contiguous block of tiles.  A tile range is specified\n * by its min/max tile coordinates and is inclusive of coordinates.\n */\nclass TileRange {\n  /**\n   * @param {number} minX Minimum X.\n   * @param {number} maxX Maximum X.\n   * @param {number} minY Minimum Y.\n   * @param {number} maxY Maximum Y.\n   */\n  constructor(minX, maxX, minY, maxY) {\n    /**\n     * @type {number}\n     */\n    this.minX = minX;\n\n    /**\n     * @type {number}\n     */\n    this.maxX = maxX;\n\n    /**\n     * @type {number}\n     */\n    this.minY = minY;\n\n    /**\n     * @type {number}\n     */\n    this.maxY = maxY;\n  }\n\n  /**\n   * @param {import(\"./tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n   * @return {boolean} Contains tile coordinate.\n   */\n  contains(tileCoord) {\n    return this.containsXY(tileCoord[1], tileCoord[2]);\n  }\n\n  /**\n   * @param {TileRange} tileRange Tile range.\n   * @return {boolean} Contains.\n   */\n  containsTileRange(tileRange) {\n    return (\n      this.minX <= tileRange.minX &&\n      tileRange.maxX <= this.maxX &&\n      this.minY <= tileRange.minY &&\n      tileRange.maxY <= this.maxY\n    );\n  }\n\n  /**\n   * @param {number} x Tile coordinate x.\n   * @param {number} y Tile coordinate y.\n   * @return {boolean} Contains coordinate.\n   */\n  containsXY(x, y) {\n    return this.minX <= x && x <= this.maxX && this.minY <= y && y <= this.maxY;\n  }\n\n  /**\n   * @param {TileRange} tileRange Tile range.\n   * @return {boolean} Equals.\n   */\n  equals(tileRange) {\n    return (\n      this.minX == tileRange.minX &&\n      this.minY == tileRange.minY &&\n      this.maxX == tileRange.maxX &&\n      this.maxY == tileRange.maxY\n    );\n  }\n\n  /**\n   * @param {TileRange} tileRange Tile range.\n   */\n  extend(tileRange) {\n    if (tileRange.minX < this.minX) {\n      this.minX = tileRange.minX;\n    }\n    if (tileRange.maxX > this.maxX) {\n      this.maxX = tileRange.maxX;\n    }\n    if (tileRange.minY < this.minY) {\n      this.minY = tileRange.minY;\n    }\n    if (tileRange.maxY > this.maxY) {\n      this.maxY = tileRange.maxY;\n    }\n  }\n\n  /**\n   * @return {number} Height.\n   */\n  getHeight() {\n    return this.maxY - this.minY + 1;\n  }\n\n  /**\n   * @return {import(\"./size.js\").Size} Size.\n   */\n  getSize() {\n    return [this.getWidth(), this.getHeight()];\n  }\n\n  /**\n   * @return {number} Width.\n   */\n  getWidth() {\n    return this.maxX - this.minX + 1;\n  }\n\n  /**\n   * @param {TileRange} tileRange Tile range.\n   * @return {boolean} Intersects.\n   */\n  intersects(tileRange) {\n    return (\n      this.minX <= tileRange.maxX &&\n      this.maxX >= tileRange.minX &&\n      this.minY <= tileRange.maxY &&\n      this.maxY >= tileRange.minY\n    );\n  }\n}\n\n/**\n * @param {number} minX Minimum X.\n * @param {number} maxX Maximum X.\n * @param {number} minY Minimum Y.\n * @param {number} maxY Maximum Y.\n * @param {TileRange} [tileRange] TileRange.\n * @return {TileRange} Tile range.\n */\nexport function createOrUpdate(minX, maxX, minY, maxY, tileRange) {\n  if (tileRange !== undefined) {\n    tileRange.minX = minX;\n    tileRange.maxX = maxX;\n    tileRange.minY = minY;\n    tileRange.maxY = maxY;\n    return tileRange;\n  }\n  return new TileRange(minX, maxX, minY, maxY);\n}\n\nexport default TileRange;\n","/**\n * @module ol/VectorRenderTile\n */\nimport Tile from './Tile.js';\nimport {createCanvasContext2D, releaseCanvas} from './dom.js';\nimport {getUid} from './util.js';\n\n/**\n * @typedef {Object} ReplayState\n * @property {boolean} dirty Dirty.\n * @property {null|import(\"./render.js\").OrderFunction} renderedRenderOrder RenderedRenderOrder.\n * @property {number} renderedTileRevision RenderedTileRevision.\n * @property {number} renderedResolution RenderedResolution.\n * @property {number} renderedRevision RenderedRevision.\n * @property {number} renderedTileResolution RenderedTileResolution.\n * @property {number} renderedTileZ RenderedTileZ.\n */\n\n/**\n * @type {Array<HTMLCanvasElement>}\n */\nconst canvasPool = [];\n\nclass VectorRenderTile extends Tile {\n  /**\n   * @param {import(\"./tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n   * @param {import(\"./TileState.js\").default} state State.\n   * @param {import(\"./tilecoord.js\").TileCoord} urlTileCoord Wrapped tile coordinate for source urls.\n   * @param {function(VectorRenderTile):Array<import(\"./VectorTile\").default>} getSourceTiles Function\n   * to get source tiles for this tile.\n   */\n  constructor(tileCoord, state, urlTileCoord, getSourceTiles) {\n    super(tileCoord, state, {transition: 0});\n\n    /**\n     * @private\n     * @type {!Object<string, CanvasRenderingContext2D>}\n     */\n    this.context_ = {};\n\n    /**\n     * Executor groups by layer uid. Entries are read/written by the renderer.\n     * @type {Object<string, Array<import(\"./render/canvas/ExecutorGroup.js\").default>>}\n     */\n    this.executorGroups = {};\n\n    /**\n     * Executor groups for decluttering, by layer uid. Entries are read/written by the renderer.\n     * @type {Object<string, Array<import(\"./render/canvas/ExecutorGroup.js\").default>>}\n     */\n    this.declutterExecutorGroups = {};\n\n    /**\n     * Number of loading source tiles. Read/written by the source.\n     * @type {number}\n     */\n    this.loadingSourceTiles = 0;\n\n    /**\n     * @type {Object<number, ImageData>}\n     */\n    this.hitDetectionImageData = {};\n\n    /**\n     * @private\n     * @type {!Object<string, ReplayState>}\n     */\n    this.replayState_ = {};\n\n    /**\n     * @type {Array<import(\"./VectorTile.js\").default>}\n     */\n    this.sourceTiles = [];\n\n    /**\n     * @type {Object<string, boolean>}\n     */\n    this.errorTileKeys = {};\n\n    /**\n     * @type {number}\n     */\n    this.wantedResolution;\n\n    /**\n     * @type {!function():Array<import(\"./VectorTile.js\").default>}\n     */\n    this.getSourceTiles = getSourceTiles.bind(undefined, this);\n\n    /**\n     * @type {import(\"./tilecoord.js\").TileCoord}\n     */\n    this.wrappedTileCoord = urlTileCoord;\n  }\n\n  /**\n   * @param {import(\"./layer/Layer.js\").default} layer Layer.\n   * @return {CanvasRenderingContext2D} The rendering context.\n   */\n  getContext(layer) {\n    const key = getUid(layer);\n    if (!(key in this.context_)) {\n      this.context_[key] = createCanvasContext2D(1, 1, canvasPool);\n    }\n    return this.context_[key];\n  }\n\n  /**\n   * @param {import(\"./layer/Layer.js\").default} layer Layer.\n   * @return {boolean} Tile has a rendering context for the given layer.\n   */\n  hasContext(layer) {\n    return getUid(layer) in this.context_;\n  }\n\n  /**\n   * Get the Canvas for this tile.\n   * @param {import(\"./layer/Layer.js\").default} layer Layer.\n   * @return {HTMLCanvasElement} Canvas.\n   */\n  getImage(layer) {\n    return this.hasContext(layer) ? this.getContext(layer).canvas : null;\n  }\n\n  /**\n   * @param {import(\"./layer/Layer.js\").default} layer Layer.\n   * @return {ReplayState} The replay state.\n   */\n  getReplayState(layer) {\n    const key = getUid(layer);\n    if (!(key in this.replayState_)) {\n      this.replayState_[key] = {\n        dirty: false,\n        renderedRenderOrder: null,\n        renderedResolution: NaN,\n        renderedRevision: -1,\n        renderedTileResolution: NaN,\n        renderedTileRevision: -1,\n        renderedTileZ: -1,\n      };\n    }\n    return this.replayState_[key];\n  }\n\n  /**\n   * Load the tile.\n   */\n  load() {\n    this.getSourceTiles();\n  }\n\n  /**\n   * Remove from the cache due to expiry\n   */\n  release() {\n    for (const key in this.context_) {\n      const context = this.context_[key];\n      releaseCanvas(context);\n      canvasPool.push(context.canvas);\n      delete this.context_[key];\n    }\n    super.release();\n  }\n}\n\nexport default VectorRenderTile;\n","/**\n * @module ol/VectorTile\n */\nimport Tile from './Tile.js';\nimport TileState from './TileState.js';\n\nclass VectorTile extends Tile {\n  /**\n   * @param {import(\"./tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n   * @param {import(\"./TileState.js\").default} state State.\n   * @param {string} src Data source url.\n   * @param {import(\"./format/Feature.js\").default} format Feature format.\n   * @param {import(\"./Tile.js\").LoadFunction} tileLoadFunction Tile load function.\n   * @param {import(\"./Tile.js\").Options} [options] Tile options.\n   */\n  constructor(tileCoord, state, src, format, tileLoadFunction, options) {\n    super(tileCoord, state, options);\n\n    /**\n     * Extent of this tile; set by the source.\n     * @type {import(\"./extent.js\").Extent}\n     */\n    this.extent = null;\n\n    /**\n     * @private\n     * @type {import(\"./format/Feature.js\").default}\n     */\n    this.format_ = format;\n\n    /**\n     * @private\n     * @type {Array<import(\"./Feature.js\").default>}\n     */\n    this.features_ = null;\n\n    /**\n     * @private\n     * @type {import(\"./featureloader.js\").FeatureLoader}\n     */\n    this.loader_;\n\n    /**\n     * Feature projection of this tile; set by the source.\n     * @type {import(\"./proj/Projection.js\").default}\n     */\n    this.projection = null;\n\n    /**\n     * Resolution of this tile; set by the source.\n     * @type {number}\n     */\n    this.resolution;\n\n    /**\n     * @private\n     * @type {import(\"./Tile.js\").LoadFunction}\n     */\n    this.tileLoadFunction_ = tileLoadFunction;\n\n    /**\n     * @private\n     * @type {string}\n     */\n    this.url_ = src;\n\n    this.key = src;\n  }\n\n  /**\n   * Get the feature format assigned for reading this tile's features.\n   * @return {import(\"./format/Feature.js\").default} Feature format.\n   * @api\n   */\n  getFormat() {\n    return this.format_;\n  }\n\n  /**\n   * Get the features for this tile. Geometries will be in the view projection.\n   * @return {Array<import(\"./Feature.js\").FeatureLike>} Features.\n   * @api\n   */\n  getFeatures() {\n    return this.features_;\n  }\n\n  /**\n   * Load not yet loaded URI.\n   */\n  load() {\n    if (this.state == TileState.IDLE) {\n      this.setState(TileState.LOADING);\n      this.tileLoadFunction_(this, this.url_);\n      if (this.loader_) {\n        this.loader_(this.extent, this.resolution, this.projection);\n      }\n    }\n  }\n\n  /**\n   * Handler for successful tile load.\n   * @param {Array<import(\"./Feature.js\").default>} features The loaded features.\n   * @param {import(\"./proj/Projection.js\").default} dataProjection Data projection.\n   */\n  onLoad(features, dataProjection) {\n    this.setFeatures(features);\n  }\n\n  /**\n   * Handler for tile load errors.\n   */\n  onError() {\n    this.setState(TileState.ERROR);\n  }\n\n  /**\n   * Function for use in an {@link module:ol/source/VectorTile~VectorTile}'s `tileLoadFunction`.\n   * Sets the features for the tile.\n   * @param {Array<import(\"./Feature.js\").default>} features Features.\n   * @api\n   */\n  setFeatures(features) {\n    this.features_ = features;\n    this.setState(TileState.LOADED);\n  }\n\n  /**\n   * Set the feature loader for reading this tile's features.\n   * @param {import(\"./featureloader.js\").FeatureLoader} loader Feature loader.\n   * @api\n   */\n  setLoader(loader) {\n    this.loader_ = loader;\n  }\n}\n\nexport default VectorTile;\n","/**\n * @module ol/colorlike\n */\nimport {toString} from './color.js';\n\n/**\n * A type accepted by CanvasRenderingContext2D.fillStyle\n * or CanvasRenderingContext2D.strokeStyle.\n * Represents a color, pattern, or gradient. The origin for patterns and\n * gradients as fill style is an increment of 512 css pixels from map coordinate\n * `[0, 0]`. For seamless repeat patterns, width and height of the pattern image\n * must be a factor of two (2, 4, 8, ..., 512).\n *\n * @typedef {string|CanvasPattern|CanvasGradient} ColorLike\n * @api\n */\n\n/**\n * @param {import(\"./color.js\").Color|ColorLike} color Color.\n * @return {ColorLike} The color as an {@link ol/colorlike~ColorLike}.\n * @api\n */\nexport function asColorLike(color) {\n  if (Array.isArray(color)) {\n    return toString(color);\n  }\n  return color;\n}\n","/**\n * @module ol/featureloader\n */\nimport {VOID} from './functions.js';\n\n/**\n *\n * @type {boolean}\n * @private\n */\nlet withCredentials = false;\n\n/**\n * {@link module:ol/source/Vector~VectorSource} sources use a function of this type to\n * load features.\n *\n * This function takes up to 5 arguments. These are an {@link module:ol/extent~Extent} representing\n * the area to be loaded, a `{number}` representing the resolution (map units per pixel), an\n * {@link module:ol/proj/Projection~Projection} for the projection, an optional success callback that should get\n * the loaded features passed as an argument and an optional failure callback with no arguments. If\n * the callbacks are not used, the corresponding vector source will not fire `'featuresloadend'` and\n * `'featuresloaderror'` events. `this` within the function is bound to the\n * {@link module:ol/source/Vector~VectorSource} it's called from.\n *\n * The function is responsible for loading the features and adding them to the\n * source.\n * @typedef {function(this:(import(\"./source/Vector\").default|import(\"./VectorTile.js\").default),\n *           import(\"./extent.js\").Extent,\n *           number,\n *           import(\"./proj/Projection.js\").default,\n *           function(Array<import(\"./Feature.js\").default>): void=,\n *           function(): void=): void} FeatureLoader\n * @api\n */\n\n/**\n * {@link module:ol/source/Vector~VectorSource} sources use a function of this type to\n * get the url to load features from.\n *\n * This function takes an {@link module:ol/extent~Extent} representing the area\n * to be loaded, a `{number}` representing the resolution (map units per pixel)\n * and an {@link module:ol/proj/Projection~Projection} for the projection  as\n * arguments and returns a `{string}` representing the URL.\n * @typedef {function(import(\"./extent.js\").Extent, number, import(\"./proj/Projection.js\").default): string} FeatureUrlFunction\n * @api\n */\n\n/**\n * @param {string|FeatureUrlFunction} url Feature URL service.\n * @param {import(\"./format/Feature.js\").default} format Feature format.\n * @param {import(\"./extent.js\").Extent} extent Extent.\n * @param {number} resolution Resolution.\n * @param {import(\"./proj/Projection.js\").default} projection Projection.\n * @param {function(Array<import(\"./Feature.js\").default>, import(\"./proj/Projection.js\").default): void} success Success\n *      Function called with the loaded features and optionally with the data projection.\n * @param {function(): void} failure Failure\n *      Function called when loading failed.\n */\nexport function loadFeaturesXhr(\n  url,\n  format,\n  extent,\n  resolution,\n  projection,\n  success,\n  failure\n) {\n  const xhr = new XMLHttpRequest();\n  xhr.open(\n    'GET',\n    typeof url === 'function' ? url(extent, resolution, projection) : url,\n    true\n  );\n  if (format.getType() == 'arraybuffer') {\n    xhr.responseType = 'arraybuffer';\n  }\n  xhr.withCredentials = withCredentials;\n  /**\n   * @param {Event} event Event.\n   * @private\n   */\n  xhr.onload = function (event) {\n    // status will be 0 for file:// urls\n    if (!xhr.status || (xhr.status >= 200 && xhr.status < 300)) {\n      const type = format.getType();\n      /** @type {Document|Node|Object|string|undefined} */\n      let source;\n      if (type == 'json' || type == 'text') {\n        source = xhr.responseText;\n      } else if (type == 'xml') {\n        source = xhr.responseXML;\n        if (!source) {\n          source = new DOMParser().parseFromString(\n            xhr.responseText,\n            'application/xml'\n          );\n        }\n      } else if (type == 'arraybuffer') {\n        source = /** @type {ArrayBuffer} */ (xhr.response);\n      }\n      if (source) {\n        success(\n          /** @type {Array<import(\"./Feature.js\").default>} */\n          (\n            format.readFeatures(source, {\n              extent: extent,\n              featureProjection: projection,\n            })\n          ),\n          format.readProjection(source)\n        );\n      } else {\n        failure();\n      }\n    } else {\n      failure();\n    }\n  };\n  /**\n   * @private\n   */\n  xhr.onerror = failure;\n  xhr.send();\n}\n\n/**\n * Create an XHR feature loader for a `url` and `format`. The feature loader\n * loads features (with XHR), parses the features, and adds them to the\n * vector source.\n * @param {string|FeatureUrlFunction} url Feature URL service.\n * @param {import(\"./format/Feature.js\").default} format Feature format.\n * @return {FeatureLoader} The feature loader.\n * @api\n */\nexport function xhr(url, format) {\n  /**\n   * @param {import(\"./extent.js\").Extent} extent Extent.\n   * @param {number} resolution Resolution.\n   * @param {import(\"./proj/Projection.js\").default} projection Projection.\n   * @param {function(Array<import(\"./Feature.js\").default>): void} [success] Success\n   *      Function called when loading succeeded.\n   * @param {function(): void} [failure] Failure\n   *      Function called when loading failed.\n   */\n  return function (extent, resolution, projection, success, failure) {\n    const source = /** @type {import(\"./source/Vector\").default} */ (this);\n    loadFeaturesXhr(\n      url,\n      format,\n      extent,\n      resolution,\n      projection,\n      /**\n       * @param {Array<import(\"./Feature.js\").default>} features The loaded features.\n       * @param {import(\"./proj/Projection.js\").default} dataProjection Data\n       * projection.\n       */\n      function (features, dataProjection) {\n        source.addFeatures(features);\n        if (success !== undefined) {\n          success(features);\n        }\n      },\n      /* FIXME handle error */ failure ? failure : VOID\n    );\n  };\n}\n\n/**\n * Setter for the withCredentials configuration for the XHR.\n *\n * @param {boolean} xhrWithCredentials The value of withCredentials to set.\n * Compare https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest/\n * @api\n */\nexport function setWithCredentials(xhrWithCredentials) {\n  withCredentials = xhrWithCredentials;\n}\n","/**\n * @module ol/net\n */\nimport {getUid} from './util.js';\n\n/**\n * Simple JSONP helper. Supports error callbacks and a custom callback param.\n * The error callback will be called when no JSONP is executed after 10 seconds.\n *\n * @param {string} url Request url. A 'callback' query parameter will be\n *     appended.\n * @param {Function} callback Callback on success.\n * @param {Function} [errback] Callback on error.\n * @param {string} [callbackParam] Custom query parameter for the JSONP\n *     callback. Default is 'callback'.\n */\nexport function jsonp(url, callback, errback, callbackParam) {\n  const script = document.createElement('script');\n  const key = 'olc_' + getUid(callback);\n  function cleanup() {\n    delete window[key];\n    script.parentNode.removeChild(script);\n  }\n  script.async = true;\n  script.src =\n    url +\n    (url.includes('?') ? '&' : '?') +\n    (callbackParam || 'callback') +\n    '=' +\n    key;\n  const timer = setTimeout(function () {\n    cleanup();\n    if (errback) {\n      errback();\n    }\n  }, 10000);\n  window[key] = function (data) {\n    clearTimeout(timer);\n    cleanup();\n    callback(data);\n  };\n  document.head.appendChild(script);\n}\n\nexport class ResponseError extends Error {\n  /**\n   * @param {XMLHttpRequest} response The XHR object.\n   */\n  constructor(response) {\n    const message = 'Unexpected response status: ' + response.status;\n    super(message);\n\n    /**\n     * @type {string}\n     */\n    this.name = 'ResponseError';\n\n    /**\n     * @type {XMLHttpRequest}\n     */\n    this.response = response;\n  }\n}\n\nexport class ClientError extends Error {\n  /**\n   * @param {XMLHttpRequest} client The XHR object.\n   */\n  constructor(client) {\n    super('Failed to issue request');\n\n    /**\n     * @type {string}\n     */\n    this.name = 'ClientError';\n\n    /**\n     * @type {XMLHttpRequest}\n     */\n    this.client = client;\n  }\n}\n\n/**\n * @param {string} url The URL.\n * @return {Promise<Object>} A promise that resolves to the JSON response.\n */\nexport function getJSON(url) {\n  return new Promise(function (resolve, reject) {\n    /**\n     * @param {ProgressEvent<XMLHttpRequest>} event The load event.\n     */\n    function onLoad(event) {\n      const client = event.target;\n      // status will be 0 for file:// urls\n      if (!client.status || (client.status >= 200 && client.status < 300)) {\n        let data;\n        try {\n          data = JSON.parse(client.responseText);\n        } catch (err) {\n          const message = 'Error parsing response text as JSON: ' + err.message;\n          reject(new Error(message));\n          return;\n        }\n        resolve(data);\n        return;\n      }\n\n      reject(new ResponseError(client));\n    }\n\n    /**\n     * @param {ProgressEvent<XMLHttpRequest>} event The error event.\n     */\n    function onError(event) {\n      reject(new ClientError(event.target));\n    }\n\n    const client = new XMLHttpRequest();\n    client.addEventListener('load', onLoad);\n    client.addEventListener('error', onError);\n    client.open('GET', url);\n    client.setRequestHeader('Accept', 'application/json');\n    client.send();\n  });\n}\n\n/**\n * @param {string} base The base URL.\n * @param {string} url The potentially relative URL.\n * @return {string} The full URL.\n */\nexport function resolveUrl(base, url) {\n  if (url.includes('://')) {\n    return url;\n  }\n  return new URL(url, base).href;\n}\n\nlet originalXHR;\nexport function overrideXHR(xhr) {\n  if (typeof XMLHttpRequest !== 'undefined') {\n    originalXHR = XMLHttpRequest;\n  }\n  global.XMLHttpRequest = xhr;\n}\n\nexport function restoreXHR() {\n  global.XMLHttpRequest = originalXHR;\n}\n","/**\n * @module ol/loadingstrategy\n */\n\nimport {fromUserExtent, fromUserResolution, toUserExtent} from './proj.js';\n\n/**\n * Strategy function for loading all features with a single request.\n * @param {import(\"./extent.js\").Extent} extent Extent.\n * @param {number} resolution Resolution.\n * @return {Array<import(\"./extent.js\").Extent>} Extents.\n * @api\n */\nexport function all(extent, resolution) {\n  return [[-Infinity, -Infinity, Infinity, Infinity]];\n}\n\n/**\n * Strategy function for loading features based on the view's extent and\n * resolution.\n * @param {import(\"./extent.js\").Extent} extent Extent.\n * @param {number} resolution Resolution.\n * @return {Array<import(\"./extent.js\").Extent>} Extents.\n * @api\n */\nexport function bbox(extent, resolution) {\n  return [extent];\n}\n\n/**\n * Creates a strategy function for loading features based on a tile grid.\n * @param {import(\"./tilegrid/TileGrid.js\").default} tileGrid Tile grid.\n * @return {function(import(\"./extent.js\").Extent, number, import(\"./proj.js\").Projection): Array<import(\"./extent.js\").Extent>} Loading strategy.\n * @api\n */\nexport function tile(tileGrid) {\n  return (\n    /**\n     * @param {import(\"./extent.js\").Extent} extent Extent.\n     * @param {number} resolution Resolution.\n     * @param {import(\"./proj.js\").Projection} projection Projection.\n     * @return {Array<import(\"./extent.js\").Extent>} Extents.\n     */\n    function (extent, resolution, projection) {\n      const z = tileGrid.getZForResolution(\n        fromUserResolution(resolution, projection)\n      );\n      const tileRange = tileGrid.getTileRangeForExtentAndZ(\n        fromUserExtent(extent, projection),\n        z\n      );\n      /** @type {Array<import(\"./extent.js\").Extent>} */\n      const extents = [];\n      /** @type {import(\"./tilecoord.js\").TileCoord} */\n      const tileCoord = [z, 0, 0];\n      for (\n        tileCoord[1] = tileRange.minX;\n        tileCoord[1] <= tileRange.maxX;\n        ++tileCoord[1]\n      ) {\n        for (\n          tileCoord[2] = tileRange.minY;\n          tileCoord[2] <= tileRange.maxY;\n          ++tileCoord[2]\n        ) {\n          extents.push(\n            toUserExtent(tileGrid.getTileCoordExtent(tileCoord), projection)\n          );\n        }\n      }\n      return extents;\n    }\n  );\n}\n","/**\n * @module ol/render/VectorContext\n */\n\n/**\n * @classdesc\n * Context for drawing geometries.  A vector context is available on render\n * events and does not need to be constructed directly.\n * @api\n */\nclass VectorContext {\n  /**\n   * Render a geometry with a custom renderer.\n   *\n   * @param {import(\"../geom/SimpleGeometry.js\").default} geometry Geometry.\n   * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n   * @param {Function} renderer Renderer.\n   * @param {Function} hitDetectionRenderer Renderer.\n   */\n  drawCustom(geometry, feature, renderer, hitDetectionRenderer) {}\n\n  /**\n   * Render a geometry.\n   *\n   * @param {import(\"../geom/Geometry.js\").default} geometry The geometry to render.\n   */\n  drawGeometry(geometry) {}\n\n  /**\n   * Set the rendering style.\n   *\n   * @param {import(\"../style/Style.js\").default} style The rendering style.\n   */\n  setStyle(style) {}\n\n  /**\n   * @param {import(\"../geom/Circle.js\").default} circleGeometry Circle geometry.\n   * @param {import(\"../Feature.js\").default} feature Feature.\n   */\n  drawCircle(circleGeometry, feature) {}\n\n  /**\n   * @param {import(\"../Feature.js\").default} feature Feature.\n   * @param {import(\"../style/Style.js\").default} style Style.\n   */\n  drawFeature(feature, style) {}\n\n  /**\n   * @param {import(\"../geom/GeometryCollection.js\").default} geometryCollectionGeometry Geometry collection.\n   * @param {import(\"../Feature.js\").default} feature Feature.\n   */\n  drawGeometryCollection(geometryCollectionGeometry, feature) {}\n\n  /**\n   * @param {import(\"../geom/LineString.js\").default|import(\"./Feature.js\").default} lineStringGeometry Line string geometry.\n   * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n   */\n  drawLineString(lineStringGeometry, feature) {}\n\n  /**\n   * @param {import(\"../geom/MultiLineString.js\").default|import(\"./Feature.js\").default} multiLineStringGeometry MultiLineString geometry.\n   * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n   */\n  drawMultiLineString(multiLineStringGeometry, feature) {}\n\n  /**\n   * @param {import(\"../geom/MultiPoint.js\").default|import(\"./Feature.js\").default} multiPointGeometry MultiPoint geometry.\n   * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n   */\n  drawMultiPoint(multiPointGeometry, feature) {}\n\n  /**\n   * @param {import(\"../geom/MultiPolygon.js\").default} multiPolygonGeometry MultiPolygon geometry.\n   * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n   */\n  drawMultiPolygon(multiPolygonGeometry, feature) {}\n\n  /**\n   * @param {import(\"../geom/Point.js\").default|import(\"./Feature.js\").default} pointGeometry Point geometry.\n   * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n   */\n  drawPoint(pointGeometry, feature) {}\n\n  /**\n   * @param {import(\"../geom/Polygon.js\").default|import(\"./Feature.js\").default} polygonGeometry Polygon geometry.\n   * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n   */\n  drawPolygon(polygonGeometry, feature) {}\n\n  /**\n   * @param {import(\"../geom/SimpleGeometry.js\").default|import(\"./Feature.js\").default} geometry Geometry.\n   * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n   */\n  drawText(geometry, feature) {}\n\n  /**\n   * @param {import(\"../style/Fill.js\").default} fillStyle Fill style.\n   * @param {import(\"../style/Stroke.js\").default} strokeStyle Stroke style.\n   */\n  setFillStrokeStyle(fillStyle, strokeStyle) {}\n\n  /**\n   * @param {import(\"../style/Image.js\").default} imageStyle Image style.\n   * @param {import(\"../render/canvas.js\").DeclutterImageWithText} [declutterImageWithText] Shared data for combined decluttering with a text style.\n   */\n  setImageStyle(imageStyle, declutterImageWithText) {}\n\n  /**\n   * @param {import(\"../style/Text.js\").default} textStyle Text style.\n   * @param {import(\"../render/canvas.js\").DeclutterImageWithText} [declutterImageWithText] Shared data for combined decluttering with an image style.\n   */\n  setTextStyle(textStyle, declutterImageWithText) {}\n}\n\nexport default VectorContext;\n","/**\n * @module ol/render/canvas/Immediate\n */\n// FIXME test, especially polygons with holes and multipolygons\n// FIXME need to handle large thick features (where pixel size matters)\n// FIXME add offset and end to ol/geom/flat/transform~transform2D?\n\nimport VectorContext from '../VectorContext.js';\nimport {asColorLike} from '../../colorlike.js';\nimport {\n  compose as composeTransform,\n  create as createTransform,\n} from '../../transform.js';\nimport {\n  defaultFillStyle,\n  defaultFont,\n  defaultLineCap,\n  defaultLineDash,\n  defaultLineDashOffset,\n  defaultLineJoin,\n  defaultLineWidth,\n  defaultMiterLimit,\n  defaultStrokeStyle,\n  defaultTextAlign,\n  defaultTextBaseline,\n} from '../canvas.js';\nimport {equals} from '../../array.js';\nimport {intersects} from '../../extent.js';\nimport {toFixed} from '../../math.js';\nimport {transform2D} from '../../geom/flat/transform.js';\nimport {transformGeom2D} from '../../geom/SimpleGeometry.js';\n\n/**\n * @classdesc\n * A concrete subclass of {@link module:ol/render/VectorContext~VectorContext} that implements\n * direct rendering of features and geometries to an HTML5 Canvas context.\n * Instances of this class are created internally by the library and\n * provided to application code as vectorContext member of the\n * {@link module:ol/render/Event~RenderEvent} object associated with postcompose, precompose and\n * render events emitted by layers and maps.\n */\nclass CanvasImmediateRenderer extends VectorContext {\n  /**\n   * @param {CanvasRenderingContext2D} context Context.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {import(\"../../extent.js\").Extent} extent Extent.\n   * @param {import(\"../../transform.js\").Transform} transform Transform.\n   * @param {number} viewRotation View rotation.\n   * @param {number} [squaredTolerance] Optional squared tolerance for simplification.\n   * @param {import(\"../../proj.js\").TransformFunction} [userTransform] Transform from user to view projection.\n   */\n  constructor(\n    context,\n    pixelRatio,\n    extent,\n    transform,\n    viewRotation,\n    squaredTolerance,\n    userTransform\n  ) {\n    super();\n\n    /**\n     * @private\n     * @type {CanvasRenderingContext2D}\n     */\n    this.context_ = context;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.pixelRatio_ = pixelRatio;\n\n    /**\n     * @private\n     * @type {import(\"../../extent.js\").Extent}\n     */\n    this.extent_ = extent;\n\n    /**\n     * @private\n     * @type {import(\"../../transform.js\").Transform}\n     */\n    this.transform_ = transform;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.transformRotation_ = transform\n      ? toFixed(Math.atan2(transform[1], transform[0]), 10)\n      : 0;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.viewRotation_ = viewRotation;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.squaredTolerance_ = squaredTolerance;\n\n    /**\n     * @private\n     * @type {import(\"../../proj.js\").TransformFunction}\n     */\n    this.userTransform_ = userTransform;\n\n    /**\n     * @private\n     * @type {?import(\"../canvas.js\").FillState}\n     */\n    this.contextFillState_ = null;\n\n    /**\n     * @private\n     * @type {?import(\"../canvas.js\").StrokeState}\n     */\n    this.contextStrokeState_ = null;\n\n    /**\n     * @private\n     * @type {?import(\"../canvas.js\").TextState}\n     */\n    this.contextTextState_ = null;\n\n    /**\n     * @private\n     * @type {?import(\"../canvas.js\").FillState}\n     */\n    this.fillState_ = null;\n\n    /**\n     * @private\n     * @type {?import(\"../canvas.js\").StrokeState}\n     */\n    this.strokeState_ = null;\n\n    /**\n     * @private\n     * @type {HTMLCanvasElement|HTMLVideoElement|HTMLImageElement}\n     */\n    this.image_ = null;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.imageAnchorX_ = 0;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.imageAnchorY_ = 0;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.imageHeight_ = 0;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.imageOpacity_ = 0;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.imageOriginX_ = 0;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.imageOriginY_ = 0;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.imageRotateWithView_ = false;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.imageRotation_ = 0;\n\n    /**\n     * @private\n     * @type {import(\"../../size.js\").Size}\n     */\n    this.imageScale_ = [0, 0];\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.imageWidth_ = 0;\n\n    /**\n     * @private\n     * @type {string}\n     */\n    this.text_ = '';\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.textOffsetX_ = 0;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.textOffsetY_ = 0;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.textRotateWithView_ = false;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.textRotation_ = 0;\n\n    /**\n     * @private\n     * @type {import(\"../../size.js\").Size}\n     */\n    this.textScale_ = [0, 0];\n\n    /**\n     * @private\n     * @type {?import(\"../canvas.js\").FillState}\n     */\n    this.textFillState_ = null;\n\n    /**\n     * @private\n     * @type {?import(\"../canvas.js\").StrokeState}\n     */\n    this.textStrokeState_ = null;\n\n    /**\n     * @private\n     * @type {?import(\"../canvas.js\").TextState}\n     */\n    this.textState_ = null;\n\n    /**\n     * @private\n     * @type {Array<number>}\n     */\n    this.pixelCoordinates_ = [];\n\n    /**\n     * @private\n     * @type {import(\"../../transform.js\").Transform}\n     */\n    this.tmpLocalTransform_ = createTransform();\n  }\n\n  /**\n   * @param {Array<number>} flatCoordinates Flat coordinates.\n   * @param {number} offset Offset.\n   * @param {number} end End.\n   * @param {number} stride Stride.\n   * @private\n   */\n  drawImages_(flatCoordinates, offset, end, stride) {\n    if (!this.image_) {\n      return;\n    }\n    const pixelCoordinates = transform2D(\n      flatCoordinates,\n      offset,\n      end,\n      stride,\n      this.transform_,\n      this.pixelCoordinates_\n    );\n    const context = this.context_;\n    const localTransform = this.tmpLocalTransform_;\n    const alpha = context.globalAlpha;\n    if (this.imageOpacity_ != 1) {\n      context.globalAlpha = alpha * this.imageOpacity_;\n    }\n    let rotation = this.imageRotation_;\n    if (this.transformRotation_ === 0) {\n      rotation -= this.viewRotation_;\n    }\n    if (this.imageRotateWithView_) {\n      rotation += this.viewRotation_;\n    }\n    for (let i = 0, ii = pixelCoordinates.length; i < ii; i += 2) {\n      const x = pixelCoordinates[i] - this.imageAnchorX_;\n      const y = pixelCoordinates[i + 1] - this.imageAnchorY_;\n      if (\n        rotation !== 0 ||\n        this.imageScale_[0] != 1 ||\n        this.imageScale_[1] != 1\n      ) {\n        const centerX = x + this.imageAnchorX_;\n        const centerY = y + this.imageAnchorY_;\n        composeTransform(\n          localTransform,\n          centerX,\n          centerY,\n          1,\n          1,\n          rotation,\n          -centerX,\n          -centerY\n        );\n        context.setTransform.apply(context, localTransform);\n        context.translate(centerX, centerY);\n        context.scale(this.imageScale_[0], this.imageScale_[1]);\n        context.drawImage(\n          this.image_,\n          this.imageOriginX_,\n          this.imageOriginY_,\n          this.imageWidth_,\n          this.imageHeight_,\n          -this.imageAnchorX_,\n          -this.imageAnchorY_,\n          this.imageWidth_,\n          this.imageHeight_\n        );\n        context.setTransform(1, 0, 0, 1, 0, 0);\n      } else {\n        context.drawImage(\n          this.image_,\n          this.imageOriginX_,\n          this.imageOriginY_,\n          this.imageWidth_,\n          this.imageHeight_,\n          x,\n          y,\n          this.imageWidth_,\n          this.imageHeight_\n        );\n      }\n    }\n    if (this.imageOpacity_ != 1) {\n      context.globalAlpha = alpha;\n    }\n  }\n\n  /**\n   * @param {Array<number>} flatCoordinates Flat coordinates.\n   * @param {number} offset Offset.\n   * @param {number} end End.\n   * @param {number} stride Stride.\n   * @private\n   */\n  drawText_(flatCoordinates, offset, end, stride) {\n    if (!this.textState_ || this.text_ === '') {\n      return;\n    }\n    if (this.textFillState_) {\n      this.setContextFillState_(this.textFillState_);\n    }\n    if (this.textStrokeState_) {\n      this.setContextStrokeState_(this.textStrokeState_);\n    }\n    this.setContextTextState_(this.textState_);\n    const pixelCoordinates = transform2D(\n      flatCoordinates,\n      offset,\n      end,\n      stride,\n      this.transform_,\n      this.pixelCoordinates_\n    );\n    const context = this.context_;\n    let rotation = this.textRotation_;\n    if (this.transformRotation_ === 0) {\n      rotation -= this.viewRotation_;\n    }\n    if (this.textRotateWithView_) {\n      rotation += this.viewRotation_;\n    }\n    for (; offset < end; offset += stride) {\n      const x = pixelCoordinates[offset] + this.textOffsetX_;\n      const y = pixelCoordinates[offset + 1] + this.textOffsetY_;\n      if (\n        rotation !== 0 ||\n        this.textScale_[0] != 1 ||\n        this.textScale_[1] != 1\n      ) {\n        context.translate(x - this.textOffsetX_, y - this.textOffsetY_);\n        context.rotate(rotation);\n        context.translate(this.textOffsetX_, this.textOffsetY_);\n        context.scale(this.textScale_[0], this.textScale_[1]);\n        if (this.textStrokeState_) {\n          context.strokeText(this.text_, 0, 0);\n        }\n        if (this.textFillState_) {\n          context.fillText(this.text_, 0, 0);\n        }\n        context.setTransform(1, 0, 0, 1, 0, 0);\n      } else {\n        if (this.textStrokeState_) {\n          context.strokeText(this.text_, x, y);\n        }\n        if (this.textFillState_) {\n          context.fillText(this.text_, x, y);\n        }\n      }\n    }\n  }\n\n  /**\n   * @param {Array<number>} flatCoordinates Flat coordinates.\n   * @param {number} offset Offset.\n   * @param {number} end End.\n   * @param {number} stride Stride.\n   * @param {boolean} close Close.\n   * @private\n   * @return {number} end End.\n   */\n  moveToLineTo_(flatCoordinates, offset, end, stride, close) {\n    const context = this.context_;\n    const pixelCoordinates = transform2D(\n      flatCoordinates,\n      offset,\n      end,\n      stride,\n      this.transform_,\n      this.pixelCoordinates_\n    );\n    context.moveTo(pixelCoordinates[0], pixelCoordinates[1]);\n    let length = pixelCoordinates.length;\n    if (close) {\n      length -= 2;\n    }\n    for (let i = 2; i < length; i += 2) {\n      context.lineTo(pixelCoordinates[i], pixelCoordinates[i + 1]);\n    }\n    if (close) {\n      context.closePath();\n    }\n    return end;\n  }\n\n  /**\n   * @param {Array<number>} flatCoordinates Flat coordinates.\n   * @param {number} offset Offset.\n   * @param {Array<number>} ends Ends.\n   * @param {number} stride Stride.\n   * @private\n   * @return {number} End.\n   */\n  drawRings_(flatCoordinates, offset, ends, stride) {\n    for (let i = 0, ii = ends.length; i < ii; ++i) {\n      offset = this.moveToLineTo_(\n        flatCoordinates,\n        offset,\n        ends[i],\n        stride,\n        true\n      );\n    }\n    return offset;\n  }\n\n  /**\n   * Render a circle geometry into the canvas.  Rendering is immediate and uses\n   * the current fill and stroke styles.\n   *\n   * @param {import(\"../../geom/Circle.js\").default} geometry Circle geometry.\n   * @api\n   */\n  drawCircle(geometry) {\n    if (this.squaredTolerance_) {\n      geometry = /** @type {import(\"../../geom/Circle.js\").default} */ (\n        geometry.simplifyTransformed(\n          this.squaredTolerance_,\n          this.userTransform_\n        )\n      );\n    }\n    if (!intersects(this.extent_, geometry.getExtent())) {\n      return;\n    }\n    if (this.fillState_ || this.strokeState_) {\n      if (this.fillState_) {\n        this.setContextFillState_(this.fillState_);\n      }\n      if (this.strokeState_) {\n        this.setContextStrokeState_(this.strokeState_);\n      }\n      const pixelCoordinates = transformGeom2D(\n        geometry,\n        this.transform_,\n        this.pixelCoordinates_\n      );\n      const dx = pixelCoordinates[2] - pixelCoordinates[0];\n      const dy = pixelCoordinates[3] - pixelCoordinates[1];\n      const radius = Math.sqrt(dx * dx + dy * dy);\n      const context = this.context_;\n      context.beginPath();\n      context.arc(\n        pixelCoordinates[0],\n        pixelCoordinates[1],\n        radius,\n        0,\n        2 * Math.PI\n      );\n      if (this.fillState_) {\n        context.fill();\n      }\n      if (this.strokeState_) {\n        context.stroke();\n      }\n    }\n    if (this.text_ !== '') {\n      this.drawText_(geometry.getCenter(), 0, 2, 2);\n    }\n  }\n\n  /**\n   * Set the rendering style.  Note that since this is an immediate rendering API,\n   * any `zIndex` on the provided style will be ignored.\n   *\n   * @param {import(\"../../style/Style.js\").default} style The rendering style.\n   * @api\n   */\n  setStyle(style) {\n    this.setFillStrokeStyle(style.getFill(), style.getStroke());\n    this.setImageStyle(style.getImage());\n    this.setTextStyle(style.getText());\n  }\n\n  /**\n   * @param {import(\"../../transform.js\").Transform} transform Transform.\n   */\n  setTransform(transform) {\n    this.transform_ = transform;\n  }\n\n  /**\n   * Render a geometry into the canvas.  Call\n   * {@link module:ol/render/canvas/Immediate~CanvasImmediateRenderer#setStyle renderer.setStyle()} first to set the rendering style.\n   *\n   * @param {import(\"../../geom/Geometry.js\").default|import(\"../Feature.js\").default} geometry The geometry to render.\n   * @api\n   */\n  drawGeometry(geometry) {\n    const type = geometry.getType();\n    switch (type) {\n      case 'Point':\n        this.drawPoint(\n          /** @type {import(\"../../geom/Point.js\").default} */ (geometry)\n        );\n        break;\n      case 'LineString':\n        this.drawLineString(\n          /** @type {import(\"../../geom/LineString.js\").default} */ (geometry)\n        );\n        break;\n      case 'Polygon':\n        this.drawPolygon(\n          /** @type {import(\"../../geom/Polygon.js\").default} */ (geometry)\n        );\n        break;\n      case 'MultiPoint':\n        this.drawMultiPoint(\n          /** @type {import(\"../../geom/MultiPoint.js\").default} */ (geometry)\n        );\n        break;\n      case 'MultiLineString':\n        this.drawMultiLineString(\n          /** @type {import(\"../../geom/MultiLineString.js\").default} */ (\n            geometry\n          )\n        );\n        break;\n      case 'MultiPolygon':\n        this.drawMultiPolygon(\n          /** @type {import(\"../../geom/MultiPolygon.js\").default} */ (geometry)\n        );\n        break;\n      case 'GeometryCollection':\n        this.drawGeometryCollection(\n          /** @type {import(\"../../geom/GeometryCollection.js\").default} */ (\n            geometry\n          )\n        );\n        break;\n      case 'Circle':\n        this.drawCircle(\n          /** @type {import(\"../../geom/Circle.js\").default} */ (geometry)\n        );\n        break;\n      default:\n    }\n  }\n\n  /**\n   * Render a feature into the canvas.  Note that any `zIndex` on the provided\n   * style will be ignored - features are rendered immediately in the order that\n   * this method is called.  If you need `zIndex` support, you should be using an\n   * {@link module:ol/layer/Vector~VectorLayer} instead.\n   *\n   * @param {import(\"../../Feature.js\").default} feature Feature.\n   * @param {import(\"../../style/Style.js\").default} style Style.\n   * @api\n   */\n  drawFeature(feature, style) {\n    const geometry = style.getGeometryFunction()(feature);\n    if (!geometry) {\n      return;\n    }\n    this.setStyle(style);\n    this.drawGeometry(geometry);\n  }\n\n  /**\n   * Render a GeometryCollection to the canvas.  Rendering is immediate and\n   * uses the current styles appropriate for each geometry in the collection.\n   *\n   * @param {import(\"../../geom/GeometryCollection.js\").default} geometry Geometry collection.\n   */\n  drawGeometryCollection(geometry) {\n    const geometries = geometry.getGeometriesArray();\n    for (let i = 0, ii = geometries.length; i < ii; ++i) {\n      this.drawGeometry(geometries[i]);\n    }\n  }\n\n  /**\n   * Render a Point geometry into the canvas.  Rendering is immediate and uses\n   * the current style.\n   *\n   * @param {import(\"../../geom/Point.js\").default|import(\"../Feature.js\").default} geometry Point geometry.\n   */\n  drawPoint(geometry) {\n    if (this.squaredTolerance_) {\n      geometry = /** @type {import(\"../../geom/Point.js\").default} */ (\n        geometry.simplifyTransformed(\n          this.squaredTolerance_,\n          this.userTransform_\n        )\n      );\n    }\n    const flatCoordinates = geometry.getFlatCoordinates();\n    const stride = geometry.getStride();\n    if (this.image_) {\n      this.drawImages_(flatCoordinates, 0, flatCoordinates.length, stride);\n    }\n    if (this.text_ !== '') {\n      this.drawText_(flatCoordinates, 0, flatCoordinates.length, stride);\n    }\n  }\n\n  /**\n   * Render a MultiPoint geometry  into the canvas.  Rendering is immediate and\n   * uses the current style.\n   *\n   * @param {import(\"../../geom/MultiPoint.js\").default|import(\"../Feature.js\").default} geometry MultiPoint geometry.\n   */\n  drawMultiPoint(geometry) {\n    if (this.squaredTolerance_) {\n      geometry = /** @type {import(\"../../geom/MultiPoint.js\").default} */ (\n        geometry.simplifyTransformed(\n          this.squaredTolerance_,\n          this.userTransform_\n        )\n      );\n    }\n    const flatCoordinates = geometry.getFlatCoordinates();\n    const stride = geometry.getStride();\n    if (this.image_) {\n      this.drawImages_(flatCoordinates, 0, flatCoordinates.length, stride);\n    }\n    if (this.text_ !== '') {\n      this.drawText_(flatCoordinates, 0, flatCoordinates.length, stride);\n    }\n  }\n\n  /**\n   * Render a LineString into the canvas.  Rendering is immediate and uses\n   * the current style.\n   *\n   * @param {import(\"../../geom/LineString.js\").default|import(\"../Feature.js\").default} geometry LineString geometry.\n   */\n  drawLineString(geometry) {\n    if (this.squaredTolerance_) {\n      geometry = /** @type {import(\"../../geom/LineString.js\").default} */ (\n        geometry.simplifyTransformed(\n          this.squaredTolerance_,\n          this.userTransform_\n        )\n      );\n    }\n    if (!intersects(this.extent_, geometry.getExtent())) {\n      return;\n    }\n    if (this.strokeState_) {\n      this.setContextStrokeState_(this.strokeState_);\n      const context = this.context_;\n      const flatCoordinates = geometry.getFlatCoordinates();\n      context.beginPath();\n      this.moveToLineTo_(\n        flatCoordinates,\n        0,\n        flatCoordinates.length,\n        geometry.getStride(),\n        false\n      );\n      context.stroke();\n    }\n    if (this.text_ !== '') {\n      const flatMidpoint = geometry.getFlatMidpoint();\n      this.drawText_(flatMidpoint, 0, 2, 2);\n    }\n  }\n\n  /**\n   * Render a MultiLineString geometry into the canvas.  Rendering is immediate\n   * and uses the current style.\n   *\n   * @param {import(\"../../geom/MultiLineString.js\").default|import(\"../Feature.js\").default} geometry MultiLineString geometry.\n   */\n  drawMultiLineString(geometry) {\n    if (this.squaredTolerance_) {\n      geometry =\n        /** @type {import(\"../../geom/MultiLineString.js\").default} */ (\n          geometry.simplifyTransformed(\n            this.squaredTolerance_,\n            this.userTransform_\n          )\n        );\n    }\n    const geometryExtent = geometry.getExtent();\n    if (!intersects(this.extent_, geometryExtent)) {\n      return;\n    }\n    if (this.strokeState_) {\n      this.setContextStrokeState_(this.strokeState_);\n      const context = this.context_;\n      const flatCoordinates = geometry.getFlatCoordinates();\n      let offset = 0;\n      const ends = /** @type {Array<number>} */ (geometry.getEnds());\n      const stride = geometry.getStride();\n      context.beginPath();\n      for (let i = 0, ii = ends.length; i < ii; ++i) {\n        offset = this.moveToLineTo_(\n          flatCoordinates,\n          offset,\n          ends[i],\n          stride,\n          false\n        );\n      }\n      context.stroke();\n    }\n    if (this.text_ !== '') {\n      const flatMidpoints = geometry.getFlatMidpoints();\n      this.drawText_(flatMidpoints, 0, flatMidpoints.length, 2);\n    }\n  }\n\n  /**\n   * Render a Polygon geometry into the canvas.  Rendering is immediate and uses\n   * the current style.\n   *\n   * @param {import(\"../../geom/Polygon.js\").default|import(\"../Feature.js\").default} geometry Polygon geometry.\n   */\n  drawPolygon(geometry) {\n    if (this.squaredTolerance_) {\n      geometry = /** @type {import(\"../../geom/Polygon.js\").default} */ (\n        geometry.simplifyTransformed(\n          this.squaredTolerance_,\n          this.userTransform_\n        )\n      );\n    }\n    if (!intersects(this.extent_, geometry.getExtent())) {\n      return;\n    }\n    if (this.strokeState_ || this.fillState_) {\n      if (this.fillState_) {\n        this.setContextFillState_(this.fillState_);\n      }\n      if (this.strokeState_) {\n        this.setContextStrokeState_(this.strokeState_);\n      }\n      const context = this.context_;\n      context.beginPath();\n      this.drawRings_(\n        geometry.getOrientedFlatCoordinates(),\n        0,\n        /** @type {Array<number>} */ (geometry.getEnds()),\n        geometry.getStride()\n      );\n      if (this.fillState_) {\n        context.fill();\n      }\n      if (this.strokeState_) {\n        context.stroke();\n      }\n    }\n    if (this.text_ !== '') {\n      const flatInteriorPoint = geometry.getFlatInteriorPoint();\n      this.drawText_(flatInteriorPoint, 0, 2, 2);\n    }\n  }\n\n  /**\n   * Render MultiPolygon geometry into the canvas.  Rendering is immediate and\n   * uses the current style.\n   * @param {import(\"../../geom/MultiPolygon.js\").default} geometry MultiPolygon geometry.\n   */\n  drawMultiPolygon(geometry) {\n    if (this.squaredTolerance_) {\n      geometry = /** @type {import(\"../../geom/MultiPolygon.js\").default} */ (\n        geometry.simplifyTransformed(\n          this.squaredTolerance_,\n          this.userTransform_\n        )\n      );\n    }\n    if (!intersects(this.extent_, geometry.getExtent())) {\n      return;\n    }\n    if (this.strokeState_ || this.fillState_) {\n      if (this.fillState_) {\n        this.setContextFillState_(this.fillState_);\n      }\n      if (this.strokeState_) {\n        this.setContextStrokeState_(this.strokeState_);\n      }\n      const context = this.context_;\n      const flatCoordinates = geometry.getOrientedFlatCoordinates();\n      let offset = 0;\n      const endss = geometry.getEndss();\n      const stride = geometry.getStride();\n      context.beginPath();\n      for (let i = 0, ii = endss.length; i < ii; ++i) {\n        const ends = endss[i];\n        offset = this.drawRings_(flatCoordinates, offset, ends, stride);\n      }\n      if (this.fillState_) {\n        context.fill();\n      }\n      if (this.strokeState_) {\n        context.stroke();\n      }\n    }\n    if (this.text_ !== '') {\n      const flatInteriorPoints = geometry.getFlatInteriorPoints();\n      this.drawText_(flatInteriorPoints, 0, flatInteriorPoints.length, 2);\n    }\n  }\n\n  /**\n   * @param {import(\"../canvas.js\").FillState} fillState Fill state.\n   * @private\n   */\n  setContextFillState_(fillState) {\n    const context = this.context_;\n    const contextFillState = this.contextFillState_;\n    if (!contextFillState) {\n      context.fillStyle = fillState.fillStyle;\n      this.contextFillState_ = {\n        fillStyle: fillState.fillStyle,\n      };\n    } else {\n      if (contextFillState.fillStyle != fillState.fillStyle) {\n        contextFillState.fillStyle = fillState.fillStyle;\n        context.fillStyle = fillState.fillStyle;\n      }\n    }\n  }\n\n  /**\n   * @param {import(\"../canvas.js\").StrokeState} strokeState Stroke state.\n   * @private\n   */\n  setContextStrokeState_(strokeState) {\n    const context = this.context_;\n    const contextStrokeState = this.contextStrokeState_;\n    if (!contextStrokeState) {\n      context.lineCap = strokeState.lineCap;\n      context.setLineDash(strokeState.lineDash);\n      context.lineDashOffset = strokeState.lineDashOffset;\n      context.lineJoin = strokeState.lineJoin;\n      context.lineWidth = strokeState.lineWidth;\n      context.miterLimit = strokeState.miterLimit;\n      context.strokeStyle = strokeState.strokeStyle;\n      this.contextStrokeState_ = {\n        lineCap: strokeState.lineCap,\n        lineDash: strokeState.lineDash,\n        lineDashOffset: strokeState.lineDashOffset,\n        lineJoin: strokeState.lineJoin,\n        lineWidth: strokeState.lineWidth,\n        miterLimit: strokeState.miterLimit,\n        strokeStyle: strokeState.strokeStyle,\n      };\n    } else {\n      if (contextStrokeState.lineCap != strokeState.lineCap) {\n        contextStrokeState.lineCap = strokeState.lineCap;\n        context.lineCap = strokeState.lineCap;\n      }\n      if (!equals(contextStrokeState.lineDash, strokeState.lineDash)) {\n        context.setLineDash(\n          (contextStrokeState.lineDash = strokeState.lineDash)\n        );\n      }\n      if (contextStrokeState.lineDashOffset != strokeState.lineDashOffset) {\n        contextStrokeState.lineDashOffset = strokeState.lineDashOffset;\n        context.lineDashOffset = strokeState.lineDashOffset;\n      }\n      if (contextStrokeState.lineJoin != strokeState.lineJoin) {\n        contextStrokeState.lineJoin = strokeState.lineJoin;\n        context.lineJoin = strokeState.lineJoin;\n      }\n      if (contextStrokeState.lineWidth != strokeState.lineWidth) {\n        contextStrokeState.lineWidth = strokeState.lineWidth;\n        context.lineWidth = strokeState.lineWidth;\n      }\n      if (contextStrokeState.miterLimit != strokeState.miterLimit) {\n        contextStrokeState.miterLimit = strokeState.miterLimit;\n        context.miterLimit = strokeState.miterLimit;\n      }\n      if (contextStrokeState.strokeStyle != strokeState.strokeStyle) {\n        contextStrokeState.strokeStyle = strokeState.strokeStyle;\n        context.strokeStyle = strokeState.strokeStyle;\n      }\n    }\n  }\n\n  /**\n   * @param {import(\"../canvas.js\").TextState} textState Text state.\n   * @private\n   */\n  setContextTextState_(textState) {\n    const context = this.context_;\n    const contextTextState = this.contextTextState_;\n    const textAlign = textState.textAlign\n      ? textState.textAlign\n      : defaultTextAlign;\n    if (!contextTextState) {\n      context.font = textState.font;\n      context.textAlign = textAlign;\n      context.textBaseline = textState.textBaseline;\n      this.contextTextState_ = {\n        font: textState.font,\n        textAlign: textAlign,\n        textBaseline: textState.textBaseline,\n      };\n    } else {\n      if (contextTextState.font != textState.font) {\n        contextTextState.font = textState.font;\n        context.font = textState.font;\n      }\n      if (contextTextState.textAlign != textAlign) {\n        contextTextState.textAlign = textAlign;\n        context.textAlign = textAlign;\n      }\n      if (contextTextState.textBaseline != textState.textBaseline) {\n        contextTextState.textBaseline = textState.textBaseline;\n        context.textBaseline = textState.textBaseline;\n      }\n    }\n  }\n\n  /**\n   * Set the fill and stroke style for subsequent draw operations.  To clear\n   * either fill or stroke styles, pass null for the appropriate parameter.\n   *\n   * @param {import(\"../../style/Fill.js\").default} fillStyle Fill style.\n   * @param {import(\"../../style/Stroke.js\").default} strokeStyle Stroke style.\n   */\n  setFillStrokeStyle(fillStyle, strokeStyle) {\n    if (!fillStyle) {\n      this.fillState_ = null;\n    } else {\n      const fillStyleColor = fillStyle.getColor();\n      this.fillState_ = {\n        fillStyle: asColorLike(\n          fillStyleColor ? fillStyleColor : defaultFillStyle\n        ),\n      };\n    }\n    if (!strokeStyle) {\n      this.strokeState_ = null;\n    } else {\n      const strokeStyleColor = strokeStyle.getColor();\n      const strokeStyleLineCap = strokeStyle.getLineCap();\n      const strokeStyleLineDash = strokeStyle.getLineDash();\n      const strokeStyleLineDashOffset = strokeStyle.getLineDashOffset();\n      const strokeStyleLineJoin = strokeStyle.getLineJoin();\n      const strokeStyleWidth = strokeStyle.getWidth();\n      const strokeStyleMiterLimit = strokeStyle.getMiterLimit();\n      const lineDash = strokeStyleLineDash\n        ? strokeStyleLineDash\n        : defaultLineDash;\n      this.strokeState_ = {\n        lineCap:\n          strokeStyleLineCap !== undefined\n            ? strokeStyleLineCap\n            : defaultLineCap,\n        lineDash:\n          this.pixelRatio_ === 1\n            ? lineDash\n            : lineDash.map((n) => n * this.pixelRatio_),\n        lineDashOffset:\n          (strokeStyleLineDashOffset\n            ? strokeStyleLineDashOffset\n            : defaultLineDashOffset) * this.pixelRatio_,\n        lineJoin:\n          strokeStyleLineJoin !== undefined\n            ? strokeStyleLineJoin\n            : defaultLineJoin,\n        lineWidth:\n          (strokeStyleWidth !== undefined\n            ? strokeStyleWidth\n            : defaultLineWidth) * this.pixelRatio_,\n        miterLimit:\n          strokeStyleMiterLimit !== undefined\n            ? strokeStyleMiterLimit\n            : defaultMiterLimit,\n        strokeStyle: asColorLike(\n          strokeStyleColor ? strokeStyleColor : defaultStrokeStyle\n        ),\n      };\n    }\n  }\n\n  /**\n   * Set the image style for subsequent draw operations.  Pass null to remove\n   * the image style.\n   *\n   * @param {import(\"../../style/Image.js\").default} imageStyle Image style.\n   */\n  setImageStyle(imageStyle) {\n    let imageSize;\n    if (!imageStyle || !(imageSize = imageStyle.getSize())) {\n      this.image_ = null;\n      return;\n    }\n    const imagePixelRatio = imageStyle.getPixelRatio(this.pixelRatio_);\n    const imageAnchor = imageStyle.getAnchor();\n    const imageOrigin = imageStyle.getOrigin();\n    this.image_ = imageStyle.getImage(this.pixelRatio_);\n    this.imageAnchorX_ = imageAnchor[0] * imagePixelRatio;\n    this.imageAnchorY_ = imageAnchor[1] * imagePixelRatio;\n    this.imageHeight_ = imageSize[1] * imagePixelRatio;\n    this.imageOpacity_ = imageStyle.getOpacity();\n    this.imageOriginX_ = imageOrigin[0];\n    this.imageOriginY_ = imageOrigin[1];\n    this.imageRotateWithView_ = imageStyle.getRotateWithView();\n    this.imageRotation_ = imageStyle.getRotation();\n    const imageScale = imageStyle.getScaleArray();\n    this.imageScale_ = [\n      (imageScale[0] * this.pixelRatio_) / imagePixelRatio,\n      (imageScale[1] * this.pixelRatio_) / imagePixelRatio,\n    ];\n    this.imageWidth_ = imageSize[0] * imagePixelRatio;\n  }\n\n  /**\n   * Set the text style for subsequent draw operations.  Pass null to\n   * remove the text style.\n   *\n   * @param {import(\"../../style/Text.js\").default} textStyle Text style.\n   */\n  setTextStyle(textStyle) {\n    if (!textStyle) {\n      this.text_ = '';\n    } else {\n      const textFillStyle = textStyle.getFill();\n      if (!textFillStyle) {\n        this.textFillState_ = null;\n      } else {\n        const textFillStyleColor = textFillStyle.getColor();\n        this.textFillState_ = {\n          fillStyle: asColorLike(\n            textFillStyleColor ? textFillStyleColor : defaultFillStyle\n          ),\n        };\n      }\n      const textStrokeStyle = textStyle.getStroke();\n      if (!textStrokeStyle) {\n        this.textStrokeState_ = null;\n      } else {\n        const textStrokeStyleColor = textStrokeStyle.getColor();\n        const textStrokeStyleLineCap = textStrokeStyle.getLineCap();\n        const textStrokeStyleLineDash = textStrokeStyle.getLineDash();\n        const textStrokeStyleLineDashOffset =\n          textStrokeStyle.getLineDashOffset();\n        const textStrokeStyleLineJoin = textStrokeStyle.getLineJoin();\n        const textStrokeStyleWidth = textStrokeStyle.getWidth();\n        const textStrokeStyleMiterLimit = textStrokeStyle.getMiterLimit();\n        this.textStrokeState_ = {\n          lineCap:\n            textStrokeStyleLineCap !== undefined\n              ? textStrokeStyleLineCap\n              : defaultLineCap,\n          lineDash: textStrokeStyleLineDash\n            ? textStrokeStyleLineDash\n            : defaultLineDash,\n          lineDashOffset: textStrokeStyleLineDashOffset\n            ? textStrokeStyleLineDashOffset\n            : defaultLineDashOffset,\n          lineJoin:\n            textStrokeStyleLineJoin !== undefined\n              ? textStrokeStyleLineJoin\n              : defaultLineJoin,\n          lineWidth:\n            textStrokeStyleWidth !== undefined\n              ? textStrokeStyleWidth\n              : defaultLineWidth,\n          miterLimit:\n            textStrokeStyleMiterLimit !== undefined\n              ? textStrokeStyleMiterLimit\n              : defaultMiterLimit,\n          strokeStyle: asColorLike(\n            textStrokeStyleColor ? textStrokeStyleColor : defaultStrokeStyle\n          ),\n        };\n      }\n      const textFont = textStyle.getFont();\n      const textOffsetX = textStyle.getOffsetX();\n      const textOffsetY = textStyle.getOffsetY();\n      const textRotateWithView = textStyle.getRotateWithView();\n      const textRotation = textStyle.getRotation();\n      const textScale = textStyle.getScaleArray();\n      const textText = textStyle.getText();\n      const textTextAlign = textStyle.getTextAlign();\n      const textTextBaseline = textStyle.getTextBaseline();\n      this.textState_ = {\n        font: textFont !== undefined ? textFont : defaultFont,\n        textAlign:\n          textTextAlign !== undefined ? textTextAlign : defaultTextAlign,\n        textBaseline:\n          textTextBaseline !== undefined\n            ? textTextBaseline\n            : defaultTextBaseline,\n      };\n      this.text_ =\n        textText !== undefined\n          ? Array.isArray(textText)\n            ? textText.reduce((acc, t, i) => (acc += i % 2 ? ' ' : t), '')\n            : textText\n          : '';\n      this.textOffsetX_ =\n        textOffsetX !== undefined ? this.pixelRatio_ * textOffsetX : 0;\n      this.textOffsetY_ =\n        textOffsetY !== undefined ? this.pixelRatio_ * textOffsetY : 0;\n      this.textRotateWithView_ =\n        textRotateWithView !== undefined ? textRotateWithView : false;\n      this.textRotation_ = textRotation !== undefined ? textRotation : 0;\n      this.textScale_ = [\n        this.pixelRatio_ * textScale[0],\n        this.pixelRatio_ * textScale[1],\n      ];\n    }\n  }\n}\n\nexport default CanvasImmediateRenderer;\n","/**\n * @module ol/renderer/vector\n */\nimport ImageState from '../ImageState.js';\nimport {getUid} from '../util.js';\n\n/**\n * Feature callback. The callback will be called with three arguments. The first\n * argument is one {@link module:ol/Feature~Feature feature} or {@link module:ol/render/Feature~RenderFeature render feature}\n * at the pixel, the second is the {@link module:ol/layer/Layer~Layer layer} of the feature and will be null for\n * unmanaged layers. The third is the {@link module:ol/geom/SimpleGeometry~SimpleGeometry} of the feature. For features\n * with a GeometryCollection geometry, it will be the first detected geometry from the collection.\n * @template T\n * @typedef {function(import(\"../Feature.js\").FeatureLike, import(\"../layer/Layer.js\").default<import(\"../source/Source\").default>, import(\"../geom/SimpleGeometry.js\").default): T} FeatureCallback\n */\n\n/**\n * Tolerance for geometry simplification in device pixels.\n * @type {number}\n */\nconst SIMPLIFY_TOLERANCE = 0.5;\n\n/**\n * @const\n * @type {Object<import(\"../geom/Geometry.js\").Type,\n *                function(import(\"../render/canvas/BuilderGroup.js\").default, import(\"../geom/Geometry.js\").default,\n *                         import(\"../style/Style.js\").default, Object): void>}\n */\nconst GEOMETRY_RENDERERS = {\n  'Point': renderPointGeometry,\n  'LineString': renderLineStringGeometry,\n  'Polygon': renderPolygonGeometry,\n  'MultiPoint': renderMultiPointGeometry,\n  'MultiLineString': renderMultiLineStringGeometry,\n  'MultiPolygon': renderMultiPolygonGeometry,\n  'GeometryCollection': renderGeometryCollectionGeometry,\n  'Circle': renderCircleGeometry,\n};\n\n/**\n * @param {import(\"../Feature.js\").FeatureLike} feature1 Feature 1.\n * @param {import(\"../Feature.js\").FeatureLike} feature2 Feature 2.\n * @return {number} Order.\n */\nexport function defaultOrder(feature1, feature2) {\n  return parseInt(getUid(feature1), 10) - parseInt(getUid(feature2), 10);\n}\n\n/**\n * @param {number} resolution Resolution.\n * @param {number} pixelRatio Pixel ratio.\n * @return {number} Squared pixel tolerance.\n */\nexport function getSquaredTolerance(resolution, pixelRatio) {\n  const tolerance = getTolerance(resolution, pixelRatio);\n  return tolerance * tolerance;\n}\n\n/**\n * @param {number} resolution Resolution.\n * @param {number} pixelRatio Pixel ratio.\n * @return {number} Pixel tolerance.\n */\nexport function getTolerance(resolution, pixelRatio) {\n  return (SIMPLIFY_TOLERANCE * resolution) / pixelRatio;\n}\n\n/**\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} builderGroup Builder group.\n * @param {import(\"../geom/Circle.js\").default} geometry Geometry.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {import(\"../Feature.js\").default} feature Feature.\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} [declutterBuilderGroup] Builder for decluttering.\n */\nfunction renderCircleGeometry(\n  builderGroup,\n  geometry,\n  style,\n  feature,\n  declutterBuilderGroup\n) {\n  const fillStyle = style.getFill();\n  const strokeStyle = style.getStroke();\n  if (fillStyle || strokeStyle) {\n    const circleReplay = builderGroup.getBuilder(style.getZIndex(), 'Circle');\n    circleReplay.setFillStrokeStyle(fillStyle, strokeStyle);\n    circleReplay.drawCircle(geometry, feature);\n  }\n  const textStyle = style.getText();\n  if (textStyle && textStyle.getText()) {\n    const textReplay = (declutterBuilderGroup || builderGroup).getBuilder(\n      style.getZIndex(),\n      'Text'\n    );\n    textReplay.setTextStyle(textStyle);\n    textReplay.drawText(geometry, feature);\n  }\n}\n\n/**\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} replayGroup Replay group.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {number} squaredTolerance Squared tolerance.\n * @param {function(import(\"../events/Event.js\").default): void} listener Listener function.\n * @param {import(\"../proj.js\").TransformFunction} [transform] Transform from user to view projection.\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} [declutterBuilderGroup] Builder for decluttering.\n * @return {boolean} `true` if style is loading.\n */\nexport function renderFeature(\n  replayGroup,\n  feature,\n  style,\n  squaredTolerance,\n  listener,\n  transform,\n  declutterBuilderGroup\n) {\n  let loading = false;\n  const imageStyle = style.getImage();\n  if (imageStyle) {\n    const imageState = imageStyle.getImageState();\n    if (imageState == ImageState.LOADED || imageState == ImageState.ERROR) {\n      imageStyle.unlistenImageChange(listener);\n    } else {\n      if (imageState == ImageState.IDLE) {\n        imageStyle.load();\n      }\n      imageStyle.listenImageChange(listener);\n      loading = true;\n    }\n  }\n  renderFeatureInternal(\n    replayGroup,\n    feature,\n    style,\n    squaredTolerance,\n    transform,\n    declutterBuilderGroup\n  );\n\n  return loading;\n}\n\n/**\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} replayGroup Replay group.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {number} squaredTolerance Squared tolerance.\n * @param {import(\"../proj.js\").TransformFunction} [transform] Optional transform function.\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} [declutterBuilderGroup] Builder for decluttering.\n */\nfunction renderFeatureInternal(\n  replayGroup,\n  feature,\n  style,\n  squaredTolerance,\n  transform,\n  declutterBuilderGroup\n) {\n  const geometry = style.getGeometryFunction()(feature);\n  if (!geometry) {\n    return;\n  }\n  const simplifiedGeometry = geometry.simplifyTransformed(\n    squaredTolerance,\n    transform\n  );\n  const renderer = style.getRenderer();\n  if (renderer) {\n    renderGeometry(replayGroup, simplifiedGeometry, style, feature);\n  } else {\n    const geometryRenderer = GEOMETRY_RENDERERS[simplifiedGeometry.getType()];\n    geometryRenderer(\n      replayGroup,\n      simplifiedGeometry,\n      style,\n      feature,\n      declutterBuilderGroup\n    );\n  }\n}\n\n/**\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} replayGroup Replay group.\n * @param {import(\"../geom/Geometry.js\").default|import(\"../render/Feature.js\").default} geometry Geometry.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n */\nfunction renderGeometry(replayGroup, geometry, style, feature) {\n  if (geometry.getType() == 'GeometryCollection') {\n    const geometries =\n      /** @type {import(\"../geom/GeometryCollection.js\").default} */ (\n        geometry\n      ).getGeometries();\n    for (let i = 0, ii = geometries.length; i < ii; ++i) {\n      renderGeometry(replayGroup, geometries[i], style, feature);\n    }\n    return;\n  }\n  const replay = replayGroup.getBuilder(style.getZIndex(), 'Default');\n  replay.drawCustom(\n    /** @type {import(\"../geom/SimpleGeometry.js\").default} */ (geometry),\n    feature,\n    style.getRenderer(),\n    style.getHitDetectionRenderer()\n  );\n}\n\n/**\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} replayGroup Replay group.\n * @param {import(\"../geom/GeometryCollection.js\").default} geometry Geometry.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {import(\"../Feature.js\").default} feature Feature.\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} [declutterBuilderGroup] Builder for decluttering.\n */\nfunction renderGeometryCollectionGeometry(\n  replayGroup,\n  geometry,\n  style,\n  feature,\n  declutterBuilderGroup\n) {\n  const geometries = geometry.getGeometriesArray();\n  let i, ii;\n  for (i = 0, ii = geometries.length; i < ii; ++i) {\n    const geometryRenderer = GEOMETRY_RENDERERS[geometries[i].getType()];\n    geometryRenderer(\n      replayGroup,\n      geometries[i],\n      style,\n      feature,\n      declutterBuilderGroup\n    );\n  }\n}\n\n/**\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} builderGroup Replay group.\n * @param {import(\"../geom/LineString.js\").default|import(\"../render/Feature.js\").default} geometry Geometry.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} [declutterBuilderGroup] Builder for decluttering.\n */\nfunction renderLineStringGeometry(\n  builderGroup,\n  geometry,\n  style,\n  feature,\n  declutterBuilderGroup\n) {\n  const strokeStyle = style.getStroke();\n  if (strokeStyle) {\n    const lineStringReplay = builderGroup.getBuilder(\n      style.getZIndex(),\n      'LineString'\n    );\n    lineStringReplay.setFillStrokeStyle(null, strokeStyle);\n    lineStringReplay.drawLineString(geometry, feature);\n  }\n  const textStyle = style.getText();\n  if (textStyle && textStyle.getText()) {\n    const textReplay = (declutterBuilderGroup || builderGroup).getBuilder(\n      style.getZIndex(),\n      'Text'\n    );\n    textReplay.setTextStyle(textStyle);\n    textReplay.drawText(geometry, feature);\n  }\n}\n\n/**\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} builderGroup Replay group.\n * @param {import(\"../geom/MultiLineString.js\").default|import(\"../render/Feature.js\").default} geometry Geometry.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} [declutterBuilderGroup] Builder for decluttering.\n */\nfunction renderMultiLineStringGeometry(\n  builderGroup,\n  geometry,\n  style,\n  feature,\n  declutterBuilderGroup\n) {\n  const strokeStyle = style.getStroke();\n  if (strokeStyle) {\n    const lineStringReplay = builderGroup.getBuilder(\n      style.getZIndex(),\n      'LineString'\n    );\n    lineStringReplay.setFillStrokeStyle(null, strokeStyle);\n    lineStringReplay.drawMultiLineString(geometry, feature);\n  }\n  const textStyle = style.getText();\n  if (textStyle && textStyle.getText()) {\n    const textReplay = (declutterBuilderGroup || builderGroup).getBuilder(\n      style.getZIndex(),\n      'Text'\n    );\n    textReplay.setTextStyle(textStyle);\n    textReplay.drawText(geometry, feature);\n  }\n}\n\n/**\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} builderGroup Replay group.\n * @param {import(\"../geom/MultiPolygon.js\").default} geometry Geometry.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {import(\"../Feature.js\").default} feature Feature.\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} [declutterBuilderGroup] Builder for decluttering.\n */\nfunction renderMultiPolygonGeometry(\n  builderGroup,\n  geometry,\n  style,\n  feature,\n  declutterBuilderGroup\n) {\n  const fillStyle = style.getFill();\n  const strokeStyle = style.getStroke();\n  if (strokeStyle || fillStyle) {\n    const polygonReplay = builderGroup.getBuilder(style.getZIndex(), 'Polygon');\n    polygonReplay.setFillStrokeStyle(fillStyle, strokeStyle);\n    polygonReplay.drawMultiPolygon(geometry, feature);\n  }\n  const textStyle = style.getText();\n  if (textStyle && textStyle.getText()) {\n    const textReplay = (declutterBuilderGroup || builderGroup).getBuilder(\n      style.getZIndex(),\n      'Text'\n    );\n    textReplay.setTextStyle(textStyle);\n    textReplay.drawText(geometry, feature);\n  }\n}\n\n/**\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} builderGroup Replay group.\n * @param {import(\"../geom/Point.js\").default|import(\"../render/Feature.js\").default} geometry Geometry.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} [declutterBuilderGroup] Builder for decluttering.\n */\nfunction renderPointGeometry(\n  builderGroup,\n  geometry,\n  style,\n  feature,\n  declutterBuilderGroup\n) {\n  const imageStyle = style.getImage();\n  const textStyle = style.getText();\n  /** @type {import(\"../render/canvas.js\").DeclutterImageWithText} */\n  let declutterImageWithText;\n  if (imageStyle) {\n    if (imageStyle.getImageState() != ImageState.LOADED) {\n      return;\n    }\n    let imageBuilderGroup = builderGroup;\n    if (declutterBuilderGroup) {\n      const declutterMode = imageStyle.getDeclutterMode();\n      if (declutterMode !== 'none') {\n        imageBuilderGroup = declutterBuilderGroup;\n        if (declutterMode === 'obstacle') {\n          // draw in non-declutter group:\n          const imageReplay = builderGroup.getBuilder(\n            style.getZIndex(),\n            'Image'\n          );\n          imageReplay.setImageStyle(imageStyle, declutterImageWithText);\n          imageReplay.drawPoint(geometry, feature);\n        } else if (textStyle && textStyle.getText()) {\n          declutterImageWithText = {};\n        }\n      }\n    }\n    const imageReplay = imageBuilderGroup.getBuilder(\n      style.getZIndex(),\n      'Image'\n    );\n    imageReplay.setImageStyle(imageStyle, declutterImageWithText);\n    imageReplay.drawPoint(geometry, feature);\n  }\n  if (textStyle && textStyle.getText()) {\n    let textBuilderGroup = builderGroup;\n    if (declutterBuilderGroup) {\n      textBuilderGroup = declutterBuilderGroup;\n    }\n    const textReplay = textBuilderGroup.getBuilder(style.getZIndex(), 'Text');\n    textReplay.setTextStyle(textStyle, declutterImageWithText);\n    textReplay.drawText(geometry, feature);\n  }\n}\n\n/**\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} builderGroup Replay group.\n * @param {import(\"../geom/MultiPoint.js\").default|import(\"../render/Feature.js\").default} geometry Geometry.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} [declutterBuilderGroup] Builder for decluttering.\n */\nfunction renderMultiPointGeometry(\n  builderGroup,\n  geometry,\n  style,\n  feature,\n  declutterBuilderGroup\n) {\n  const imageStyle = style.getImage();\n  const textStyle = style.getText();\n  /** @type {import(\"../render/canvas.js\").DeclutterImageWithText} */\n  let declutterImageWithText;\n  if (imageStyle) {\n    if (imageStyle.getImageState() != ImageState.LOADED) {\n      return;\n    }\n    let imageBuilderGroup = builderGroup;\n    if (declutterBuilderGroup) {\n      const declutterMode = imageStyle.getDeclutterMode();\n      if (declutterMode !== 'none') {\n        imageBuilderGroup = declutterBuilderGroup;\n        if (declutterMode === 'obstacle') {\n          // draw in non-declutter group:\n          const imageReplay = builderGroup.getBuilder(\n            style.getZIndex(),\n            'Image'\n          );\n          imageReplay.setImageStyle(imageStyle, declutterImageWithText);\n          imageReplay.drawMultiPoint(geometry, feature);\n        } else if (textStyle && textStyle.getText()) {\n          declutterImageWithText = {};\n        }\n      }\n    }\n    const imageReplay = imageBuilderGroup.getBuilder(\n      style.getZIndex(),\n      'Image'\n    );\n    imageReplay.setImageStyle(imageStyle, declutterImageWithText);\n    imageReplay.drawMultiPoint(geometry, feature);\n  }\n  if (textStyle && textStyle.getText()) {\n    let textBuilderGroup = builderGroup;\n    if (declutterBuilderGroup) {\n      textBuilderGroup = declutterBuilderGroup;\n    }\n    const textReplay = textBuilderGroup.getBuilder(style.getZIndex(), 'Text');\n    textReplay.setTextStyle(textStyle, declutterImageWithText);\n    textReplay.drawText(geometry, feature);\n  }\n}\n\n/**\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} builderGroup Replay group.\n * @param {import(\"../geom/Polygon.js\").default|import(\"../render/Feature.js\").default} geometry Geometry.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} [declutterBuilderGroup] Builder for decluttering.\n */\nfunction renderPolygonGeometry(\n  builderGroup,\n  geometry,\n  style,\n  feature,\n  declutterBuilderGroup\n) {\n  const fillStyle = style.getFill();\n  const strokeStyle = style.getStroke();\n  if (fillStyle || strokeStyle) {\n    const polygonReplay = builderGroup.getBuilder(style.getZIndex(), 'Polygon');\n    polygonReplay.setFillStrokeStyle(fillStyle, strokeStyle);\n    polygonReplay.drawPolygon(geometry, feature);\n  }\n  const textStyle = style.getText();\n  if (textStyle && textStyle.getText()) {\n    const textReplay = (declutterBuilderGroup || builderGroup).getBuilder(\n      style.getZIndex(),\n      'Text'\n    );\n    textReplay.setTextStyle(textStyle);\n    textReplay.drawText(geometry, feature);\n  }\n}\n","/**\n * @module ol/render\n */\nimport CanvasImmediateRenderer from './render/canvas/Immediate.js';\nimport {DEVICE_PIXEL_RATIO} from './has.js';\nimport {\n  apply as applyTransform,\n  create as createTransform,\n  multiply as multiplyTransform,\n  scale as scaleTransform,\n} from './transform.js';\nimport {getSquaredTolerance} from './renderer/vector.js';\nimport {getTransformFromProjections, getUserProjection} from './proj.js';\n\n/**\n * @typedef {Object} State\n * @property {CanvasRenderingContext2D} context Canvas context that the layer is being rendered to.\n * @property {import(\"./Feature.js\").FeatureLike} feature Feature.\n * @property {import(\"./geom/SimpleGeometry.js\").default} geometry Geometry.\n * @property {number} pixelRatio Pixel ratio used by the layer renderer.\n * @property {number} resolution Resolution that the render batch was created and optimized for.\n * This is not the view's resolution that is being rendered.\n * @property {number} rotation Rotation of the rendered layer in radians.\n */\n\n/**\n * A function to be used when sorting features before rendering.\n * It takes two instances of {@link module:ol/Feature~Feature} or\n * {@link module:ol/render/Feature~RenderFeature} and returns a `{number}`.\n *\n * @typedef {function(import(\"./Feature.js\").FeatureLike, import(\"./Feature.js\").FeatureLike):number} OrderFunction\n */\n\n/**\n * @typedef {Object} ToContextOptions\n * @property {import(\"./size.js\").Size} [size] Desired size of the canvas in css\n * pixels. When provided, both canvas and css size will be set according to the\n * `pixelRatio`. If not provided, the current canvas and css sizes will not be\n * altered.\n * @property {number} [pixelRatio=window.devicePixelRatio] Pixel ratio (canvas\n * pixel to css pixel ratio) for the canvas.\n */\n\n/**\n * Binds a Canvas Immediate API to a canvas context, to allow drawing geometries\n * to the context's canvas.\n *\n * The units for geometry coordinates are css pixels relative to the top left\n * corner of the canvas element.\n * ```js\n * import {toContext} from 'ol/render.js';\n * import Fill from 'ol/style/Fill.js';\n * import Polygon from 'ol/geom/Polygon.js';\n *\n * const canvas = document.createElement('canvas');\n * const render = toContext(\n *     canvas.getContext('2d'),\n *     {size: [100, 100]}\n * );\n * render.setFillStrokeStyle(new Fill({ color: blue }));\n * render.drawPolygon(\n *     new Polygon([[[0, 0], [100, 100], [100, 0], [0, 0]]])\n * );\n * ```\n *\n * @param {CanvasRenderingContext2D} context Canvas context.\n * @param {ToContextOptions} [options] Options.\n * @return {CanvasImmediateRenderer} Canvas Immediate.\n * @api\n */\nexport function toContext(context, options) {\n  const canvas = context.canvas;\n  options = options ? options : {};\n  const pixelRatio = options.pixelRatio || DEVICE_PIXEL_RATIO;\n  const size = options.size;\n  if (size) {\n    canvas.width = size[0] * pixelRatio;\n    canvas.height = size[1] * pixelRatio;\n    canvas.style.width = size[0] + 'px';\n    canvas.style.height = size[1] + 'px';\n  }\n  const extent = [0, 0, canvas.width, canvas.height];\n  const transform = scaleTransform(createTransform(), pixelRatio, pixelRatio);\n  return new CanvasImmediateRenderer(context, pixelRatio, extent, transform, 0);\n}\n\n/**\n * Gets a vector context for drawing to the event's canvas.\n * @param {import(\"./render/Event.js\").default} event Render event.\n * @return {CanvasImmediateRenderer} Vector context.\n * @api\n */\nexport function getVectorContext(event) {\n  if (!(event.context instanceof CanvasRenderingContext2D)) {\n    throw new Error('Only works for render events from Canvas 2D layers');\n  }\n\n  // canvas may be at a different pixel ratio than frameState.pixelRatio\n  const a = event.inversePixelTransform[0];\n  const b = event.inversePixelTransform[1];\n  const canvasPixelRatio = Math.sqrt(a * a + b * b);\n  const frameState = event.frameState;\n  const transform = multiplyTransform(\n    event.inversePixelTransform.slice(),\n    frameState.coordinateToPixelTransform\n  );\n  const squaredTolerance = getSquaredTolerance(\n    frameState.viewState.resolution,\n    canvasPixelRatio\n  );\n  let userTransform;\n  const userProjection = getUserProjection();\n  if (userProjection) {\n    userTransform = getTransformFromProjections(\n      userProjection,\n      frameState.viewState.projection\n    );\n  }\n\n  return new CanvasImmediateRenderer(\n    event.context,\n    canvasPixelRatio,\n    frameState.extent,\n    transform,\n    frameState.viewState.rotation,\n    squaredTolerance,\n    userTransform\n  );\n}\n\n/**\n * Gets the pixel of the event's canvas context from the map viewport's CSS pixel.\n * @param {import(\"./render/Event.js\").default} event Render event.\n * @param {import(\"./pixel.js\").Pixel} pixel CSS pixel relative to the top-left\n * corner of the map viewport.\n * @return {import(\"./pixel.js\").Pixel} Pixel on the event's canvas context.\n * @api\n */\nexport function getRenderPixel(event, pixel) {\n  return applyTransform(event.inversePixelTransform, pixel.slice(0));\n}\n","/**\n * @module ol/reproj\n */\nimport {\n  containsCoordinate,\n  createEmpty,\n  extend,\n  forEachCorner,\n  getCenter,\n  getHeight,\n  getTopLeft,\n  getWidth,\n} from './extent.js';\nimport {createCanvasContext2D, releaseCanvas} from './dom.js';\nimport {getPointResolution, transform} from './proj.js';\nimport {solveLinearSystem} from './math.js';\n\nlet brokenDiagonalRendering_;\n\n/**\n * @type {Array<HTMLCanvasElement>}\n */\nexport const canvasPool = [];\n\n/**\n * This draws a small triangle into a canvas by setting the triangle as the clip region\n * and then drawing a (too large) rectangle\n *\n * @param {CanvasRenderingContext2D} ctx The context in which to draw the triangle\n * @param {number} u1 The x-coordinate of the second point. The first point is 0,0.\n * @param {number} v1 The y-coordinate of the second point.\n * @param {number} u2 The x-coordinate of the third point.\n * @param {number} v2 The y-coordinate of the third point.\n */\nfunction drawTestTriangle(ctx, u1, v1, u2, v2) {\n  ctx.beginPath();\n  ctx.moveTo(0, 0);\n  ctx.lineTo(u1, v1);\n  ctx.lineTo(u2, v2);\n  ctx.closePath();\n  ctx.save();\n  ctx.clip();\n  ctx.fillRect(0, 0, Math.max(u1, u2) + 1, Math.max(v1, v2));\n  ctx.restore();\n}\n\n/**\n * Given the data from getImageData, see if the right values appear at the provided offset.\n * Returns true if either the color or transparency is off\n *\n * @param {Uint8ClampedArray} data The data returned from getImageData\n * @param {number} offset The pixel offset from the start of data.\n * @return {boolean} true if the diagonal rendering is broken\n */\nfunction verifyBrokenDiagonalRendering(data, offset) {\n  // the values ought to be close to the rgba(210, 0, 0, 0.75)\n  return (\n    Math.abs(data[offset * 4] - 210) > 2 ||\n    Math.abs(data[offset * 4 + 3] - 0.75 * 255) > 2\n  );\n}\n\n/**\n * Determines if the current browser configuration can render triangular clip regions correctly.\n * This value is cached so the function is only expensive the first time called.\n * Firefox on Windows (as of now) does not if HWA is enabled. See https://bugzilla.mozilla.org/show_bug.cgi?id=1606976\n * Chrome works, and everything seems to work on OSX and Android. This function caches the\n * result. I suppose that it is conceivably possible that a browser might flip modes while the app is\n * running, but lets hope not.\n *\n * @return {boolean} true if the Diagonal Rendering is broken.\n */\nfunction isBrokenDiagonalRendering() {\n  if (brokenDiagonalRendering_ === undefined) {\n    const ctx = createCanvasContext2D(6, 6, canvasPool);\n    ctx.globalCompositeOperation = 'lighter';\n    ctx.fillStyle = 'rgba(210, 0, 0, 0.75)';\n    drawTestTriangle(ctx, 4, 5, 4, 0);\n    drawTestTriangle(ctx, 4, 5, 0, 5);\n    const data = ctx.getImageData(0, 0, 3, 3).data;\n    brokenDiagonalRendering_ =\n      verifyBrokenDiagonalRendering(data, 0) ||\n      verifyBrokenDiagonalRendering(data, 4) ||\n      verifyBrokenDiagonalRendering(data, 8);\n    releaseCanvas(ctx);\n    canvasPool.push(ctx.canvas);\n  }\n\n  return brokenDiagonalRendering_;\n}\n\n/**\n * Calculates ideal resolution to use from the source in order to achieve\n * pixel mapping as close as possible to 1:1 during reprojection.\n * The resolution is calculated regardless of what resolutions\n * are actually available in the dataset (TileGrid, Image, ...).\n *\n * @param {import(\"./proj/Projection.js\").default} sourceProj Source projection.\n * @param {import(\"./proj/Projection.js\").default} targetProj Target projection.\n * @param {import(\"./coordinate.js\").Coordinate} targetCenter Target center.\n * @param {number} targetResolution Target resolution.\n * @return {number} The best resolution to use. Can be +-Infinity, NaN or 0.\n */\nexport function calculateSourceResolution(\n  sourceProj,\n  targetProj,\n  targetCenter,\n  targetResolution\n) {\n  const sourceCenter = transform(targetCenter, targetProj, sourceProj);\n\n  // calculate the ideal resolution of the source data\n  let sourceResolution = getPointResolution(\n    targetProj,\n    targetResolution,\n    targetCenter\n  );\n\n  const targetMetersPerUnit = targetProj.getMetersPerUnit();\n  if (targetMetersPerUnit !== undefined) {\n    sourceResolution *= targetMetersPerUnit;\n  }\n  const sourceMetersPerUnit = sourceProj.getMetersPerUnit();\n  if (sourceMetersPerUnit !== undefined) {\n    sourceResolution /= sourceMetersPerUnit;\n  }\n\n  // Based on the projection properties, the point resolution at the specified\n  // coordinates may be slightly different. We need to reverse-compensate this\n  // in order to achieve optimal results.\n\n  const sourceExtent = sourceProj.getExtent();\n  if (!sourceExtent || containsCoordinate(sourceExtent, sourceCenter)) {\n    const compensationFactor =\n      getPointResolution(sourceProj, sourceResolution, sourceCenter) /\n      sourceResolution;\n    if (isFinite(compensationFactor) && compensationFactor > 0) {\n      sourceResolution /= compensationFactor;\n    }\n  }\n\n  return sourceResolution;\n}\n\n/**\n * Calculates ideal resolution to use from the source in order to achieve\n * pixel mapping as close as possible to 1:1 during reprojection.\n * The resolution is calculated regardless of what resolutions\n * are actually available in the dataset (TileGrid, Image, ...).\n *\n * @param {import(\"./proj/Projection.js\").default} sourceProj Source projection.\n * @param {import(\"./proj/Projection.js\").default} targetProj Target projection.\n * @param {import(\"./extent.js\").Extent} targetExtent Target extent\n * @param {number} targetResolution Target resolution.\n * @return {number} The best resolution to use. Can be +-Infinity, NaN or 0.\n */\nexport function calculateSourceExtentResolution(\n  sourceProj,\n  targetProj,\n  targetExtent,\n  targetResolution\n) {\n  const targetCenter = getCenter(targetExtent);\n  let sourceResolution = calculateSourceResolution(\n    sourceProj,\n    targetProj,\n    targetCenter,\n    targetResolution\n  );\n\n  if (!isFinite(sourceResolution) || sourceResolution <= 0) {\n    forEachCorner(targetExtent, function (corner) {\n      sourceResolution = calculateSourceResolution(\n        sourceProj,\n        targetProj,\n        corner,\n        targetResolution\n      );\n      return isFinite(sourceResolution) && sourceResolution > 0;\n    });\n  }\n\n  return sourceResolution;\n}\n\n/**\n * @typedef {Object} ImageExtent\n * @property {import(\"./extent.js\").Extent} extent Extent.\n * @property {HTMLCanvasElement|HTMLImageElement|HTMLVideoElement} image Image.\n */\n\n/**\n * Renders the source data into new canvas based on the triangulation.\n *\n * @param {number} width Width of the canvas.\n * @param {number} height Height of the canvas.\n * @param {number} pixelRatio Pixel ratio.\n * @param {number} sourceResolution Source resolution.\n * @param {import(\"./extent.js\").Extent} sourceExtent Extent of the data source.\n * @param {number} targetResolution Target resolution.\n * @param {import(\"./extent.js\").Extent} targetExtent Target extent.\n * @param {import(\"./reproj/Triangulation.js\").default} triangulation Calculated triangulation.\n * @param {Array<ImageExtent>} sources Array of sources.\n * @param {number} gutter Gutter of the sources.\n * @param {boolean} [renderEdges] Render reprojection edges.\n * @param {boolean} [interpolate] Use linear interpolation when resampling.\n * @return {HTMLCanvasElement} Canvas with reprojected data.\n */\nexport function render(\n  width,\n  height,\n  pixelRatio,\n  sourceResolution,\n  sourceExtent,\n  targetResolution,\n  targetExtent,\n  triangulation,\n  sources,\n  gutter,\n  renderEdges,\n  interpolate\n) {\n  const context = createCanvasContext2D(\n    Math.round(pixelRatio * width),\n    Math.round(pixelRatio * height),\n    canvasPool\n  );\n\n  if (!interpolate) {\n    context.imageSmoothingEnabled = false;\n  }\n\n  if (sources.length === 0) {\n    return context.canvas;\n  }\n\n  context.scale(pixelRatio, pixelRatio);\n\n  function pixelRound(value) {\n    return Math.round(value * pixelRatio) / pixelRatio;\n  }\n\n  context.globalCompositeOperation = 'lighter';\n\n  const sourceDataExtent = createEmpty();\n  sources.forEach(function (src, i, arr) {\n    extend(sourceDataExtent, src.extent);\n  });\n\n  const canvasWidthInUnits = getWidth(sourceDataExtent);\n  const canvasHeightInUnits = getHeight(sourceDataExtent);\n  const stitchContext = createCanvasContext2D(\n    Math.round((pixelRatio * canvasWidthInUnits) / sourceResolution),\n    Math.round((pixelRatio * canvasHeightInUnits) / sourceResolution),\n    canvasPool\n  );\n\n  if (!interpolate) {\n    stitchContext.imageSmoothingEnabled = false;\n  }\n\n  const stitchScale = pixelRatio / sourceResolution;\n\n  sources.forEach(function (src, i, arr) {\n    const xPos = src.extent[0] - sourceDataExtent[0];\n    const yPos = -(src.extent[3] - sourceDataExtent[3]);\n    const srcWidth = getWidth(src.extent);\n    const srcHeight = getHeight(src.extent);\n\n    // This test should never fail -- but it does. Need to find a fix the upstream condition\n    if (src.image.width > 0 && src.image.height > 0) {\n      stitchContext.drawImage(\n        src.image,\n        gutter,\n        gutter,\n        src.image.width - 2 * gutter,\n        src.image.height - 2 * gutter,\n        xPos * stitchScale,\n        yPos * stitchScale,\n        srcWidth * stitchScale,\n        srcHeight * stitchScale\n      );\n    }\n  });\n\n  const targetTopLeft = getTopLeft(targetExtent);\n\n  triangulation.getTriangles().forEach(function (triangle, i, arr) {\n    /* Calculate affine transform (src -> dst)\n     * Resulting matrix can be used to transform coordinate\n     * from `sourceProjection` to destination pixels.\n     *\n     * To optimize number of context calls and increase numerical stability,\n     * we also do the following operations:\n     * trans(-topLeftExtentCorner), scale(1 / targetResolution), scale(1, -1)\n     * here before solving the linear system so [ui, vi] are pixel coordinates.\n     *\n     * Src points: xi, yi\n     * Dst points: ui, vi\n     * Affine coefficients: aij\n     *\n     * | x0 y0 1  0  0 0 |   |a00|   |u0|\n     * | x1 y1 1  0  0 0 |   |a01|   |u1|\n     * | x2 y2 1  0  0 0 | x |a02| = |u2|\n     * |  0  0 0 x0 y0 1 |   |a10|   |v0|\n     * |  0  0 0 x1 y1 1 |   |a11|   |v1|\n     * |  0  0 0 x2 y2 1 |   |a12|   |v2|\n     */\n    const source = triangle.source;\n    const target = triangle.target;\n    let x0 = source[0][0],\n      y0 = source[0][1];\n    let x1 = source[1][0],\n      y1 = source[1][1];\n    let x2 = source[2][0],\n      y2 = source[2][1];\n    // Make sure that everything is on pixel boundaries\n    const u0 = pixelRound((target[0][0] - targetTopLeft[0]) / targetResolution);\n    const v0 = pixelRound(\n      -(target[0][1] - targetTopLeft[1]) / targetResolution\n    );\n    const u1 = pixelRound((target[1][0] - targetTopLeft[0]) / targetResolution);\n    const v1 = pixelRound(\n      -(target[1][1] - targetTopLeft[1]) / targetResolution\n    );\n    const u2 = pixelRound((target[2][0] - targetTopLeft[0]) / targetResolution);\n    const v2 = pixelRound(\n      -(target[2][1] - targetTopLeft[1]) / targetResolution\n    );\n\n    // Shift all the source points to improve numerical stability\n    // of all the subsequent calculations. The [x0, y0] is used here.\n    // This is also used to simplify the linear system.\n    const sourceNumericalShiftX = x0;\n    const sourceNumericalShiftY = y0;\n    x0 = 0;\n    y0 = 0;\n    x1 -= sourceNumericalShiftX;\n    y1 -= sourceNumericalShiftY;\n    x2 -= sourceNumericalShiftX;\n    y2 -= sourceNumericalShiftY;\n\n    const augmentedMatrix = [\n      [x1, y1, 0, 0, u1 - u0],\n      [x2, y2, 0, 0, u2 - u0],\n      [0, 0, x1, y1, v1 - v0],\n      [0, 0, x2, y2, v2 - v0],\n    ];\n    const affineCoefs = solveLinearSystem(augmentedMatrix);\n    if (!affineCoefs) {\n      return;\n    }\n\n    context.save();\n    context.beginPath();\n\n    if (isBrokenDiagonalRendering() || !interpolate) {\n      // Make sure that all lines are horizontal or vertical\n      context.moveTo(u1, v1);\n      // This is the diagonal line. Do it in 4 steps\n      const steps = 4;\n      const ud = u0 - u1;\n      const vd = v0 - v1;\n      for (let step = 0; step < steps; step++) {\n        // Go horizontally\n        context.lineTo(\n          u1 + pixelRound(((step + 1) * ud) / steps),\n          v1 + pixelRound((step * vd) / (steps - 1))\n        );\n        // Go vertically\n        if (step != steps - 1) {\n          context.lineTo(\n            u1 + pixelRound(((step + 1) * ud) / steps),\n            v1 + pixelRound(((step + 1) * vd) / (steps - 1))\n          );\n        }\n      }\n      // We are almost at u0r, v0r\n      context.lineTo(u2, v2);\n    } else {\n      context.moveTo(u1, v1);\n      context.lineTo(u0, v0);\n      context.lineTo(u2, v2);\n    }\n\n    context.clip();\n\n    context.transform(\n      affineCoefs[0],\n      affineCoefs[2],\n      affineCoefs[1],\n      affineCoefs[3],\n      u0,\n      v0\n    );\n\n    context.translate(\n      sourceDataExtent[0] - sourceNumericalShiftX,\n      sourceDataExtent[3] - sourceNumericalShiftY\n    );\n\n    context.scale(\n      sourceResolution / pixelRatio,\n      -sourceResolution / pixelRatio\n    );\n\n    context.drawImage(stitchContext.canvas, 0, 0);\n    context.restore();\n  });\n\n  releaseCanvas(stitchContext);\n  canvasPool.push(stitchContext.canvas);\n\n  if (renderEdges) {\n    context.save();\n\n    context.globalCompositeOperation = 'source-over';\n    context.strokeStyle = 'black';\n    context.lineWidth = 1;\n\n    triangulation.getTriangles().forEach(function (triangle, i, arr) {\n      const target = triangle.target;\n      const u0 = (target[0][0] - targetTopLeft[0]) / targetResolution;\n      const v0 = -(target[0][1] - targetTopLeft[1]) / targetResolution;\n      const u1 = (target[1][0] - targetTopLeft[0]) / targetResolution;\n      const v1 = -(target[1][1] - targetTopLeft[1]) / targetResolution;\n      const u2 = (target[2][0] - targetTopLeft[0]) / targetResolution;\n      const v2 = -(target[2][1] - targetTopLeft[1]) / targetResolution;\n\n      context.beginPath();\n      context.moveTo(u1, v1);\n      context.lineTo(u0, v0);\n      context.lineTo(u2, v2);\n      context.closePath();\n      context.stroke();\n    });\n\n    context.restore();\n  }\n  return context.canvas;\n}\n","/**\n * @module ol/reproj/common\n */\n\n/**\n * Default maximum allowed threshold  (in pixels) for reprojection\n * triangulation.\n * @type {number}\n */\nexport const ERROR_THRESHOLD = 0.5;\n","/**\n * @module ol/reproj/Triangulation\n */\nimport {\n  boundingExtent,\n  createEmpty,\n  extendCoordinate,\n  getArea,\n  getBottomLeft,\n  getBottomRight,\n  getTopLeft,\n  getTopRight,\n  getWidth,\n  intersects,\n} from '../extent.js';\nimport {getTransform} from '../proj.js';\nimport {modulo} from '../math.js';\n\n/**\n * Single triangle; consists of 3 source points and 3 target points.\n * @typedef {Object} Triangle\n * @property {Array<import(\"../coordinate.js\").Coordinate>} source Source.\n * @property {Array<import(\"../coordinate.js\").Coordinate>} target Target.\n */\n\n/**\n * Maximum number of subdivision steps during raster reprojection triangulation.\n * Prevents high memory usage and large number of proj4 calls (for certain\n * transformations and areas). At most `2*(2^this)` triangles are created for\n * each triangulated extent (tile/image).\n * @type {number}\n */\nconst MAX_SUBDIVISION = 10;\n\n/**\n * Maximum allowed size of triangle relative to world width. When transforming\n * corners of world extent between certain projections, the resulting\n * triangulation seems to have zero error and no subdivision is performed. If\n * the triangle width is more than this (relative to world width; 0-1),\n * subdivison is forced (up to `MAX_SUBDIVISION`). Default is `0.25`.\n * @type {number}\n */\nconst MAX_TRIANGLE_WIDTH = 0.25;\n\n/**\n * @classdesc\n * Class containing triangulation of the given target extent.\n * Used for determining source data and the reprojection itself.\n */\nclass Triangulation {\n  /**\n   * @param {import(\"../proj/Projection.js\").default} sourceProj Source projection.\n   * @param {import(\"../proj/Projection.js\").default} targetProj Target projection.\n   * @param {import(\"../extent.js\").Extent} targetExtent Target extent to triangulate.\n   * @param {import(\"../extent.js\").Extent} maxSourceExtent Maximal source extent that can be used.\n   * @param {number} errorThreshold Acceptable error (in source units).\n   * @param {?number} destinationResolution The (optional) resolution of the destination.\n   */\n  constructor(\n    sourceProj,\n    targetProj,\n    targetExtent,\n    maxSourceExtent,\n    errorThreshold,\n    destinationResolution\n  ) {\n    /**\n     * @type {import(\"../proj/Projection.js\").default}\n     * @private\n     */\n    this.sourceProj_ = sourceProj;\n\n    /**\n     * @type {import(\"../proj/Projection.js\").default}\n     * @private\n     */\n    this.targetProj_ = targetProj;\n\n    /** @type {!Object<string, import(\"../coordinate.js\").Coordinate>} */\n    let transformInvCache = {};\n    const transformInv = getTransform(this.targetProj_, this.sourceProj_);\n\n    /**\n     * @param {import(\"../coordinate.js\").Coordinate} c A coordinate.\n     * @return {import(\"../coordinate.js\").Coordinate} Transformed coordinate.\n     * @private\n     */\n    this.transformInv_ = function (c) {\n      const key = c[0] + '/' + c[1];\n      if (!transformInvCache[key]) {\n        transformInvCache[key] = transformInv(c);\n      }\n      return transformInvCache[key];\n    };\n\n    /**\n     * @type {import(\"../extent.js\").Extent}\n     * @private\n     */\n    this.maxSourceExtent_ = maxSourceExtent;\n\n    /**\n     * @type {number}\n     * @private\n     */\n    this.errorThresholdSquared_ = errorThreshold * errorThreshold;\n\n    /**\n     * @type {Array<Triangle>}\n     * @private\n     */\n    this.triangles_ = [];\n\n    /**\n     * Indicates that the triangulation crosses edge of the source projection.\n     * @type {boolean}\n     * @private\n     */\n    this.wrapsXInSource_ = false;\n\n    /**\n     * @type {boolean}\n     * @private\n     */\n    this.canWrapXInSource_ =\n      this.sourceProj_.canWrapX() &&\n      !!maxSourceExtent &&\n      !!this.sourceProj_.getExtent() &&\n      getWidth(maxSourceExtent) >= getWidth(this.sourceProj_.getExtent());\n\n    /**\n     * @type {?number}\n     * @private\n     */\n    this.sourceWorldWidth_ = this.sourceProj_.getExtent()\n      ? getWidth(this.sourceProj_.getExtent())\n      : null;\n\n    /**\n     * @type {?number}\n     * @private\n     */\n    this.targetWorldWidth_ = this.targetProj_.getExtent()\n      ? getWidth(this.targetProj_.getExtent())\n      : null;\n\n    const destinationTopLeft = getTopLeft(targetExtent);\n    const destinationTopRight = getTopRight(targetExtent);\n    const destinationBottomRight = getBottomRight(targetExtent);\n    const destinationBottomLeft = getBottomLeft(targetExtent);\n    const sourceTopLeft = this.transformInv_(destinationTopLeft);\n    const sourceTopRight = this.transformInv_(destinationTopRight);\n    const sourceBottomRight = this.transformInv_(destinationBottomRight);\n    const sourceBottomLeft = this.transformInv_(destinationBottomLeft);\n\n    /*\n     * The maxSubdivision controls how many splittings of the target area can\n     * be done. The idea here is to do a linear mapping of the target areas\n     * but the actual overall reprojection (can be) extremely non-linear. The\n     * default value of MAX_SUBDIVISION was chosen based on mapping a 256x256\n     * tile size. However this function is also called to remap canvas rendered\n     * layers which can be much larger. This calculation increases the maxSubdivision\n     * value by the right factor so that each 256x256 pixel area has\n     * MAX_SUBDIVISION divisions.\n     */\n    const maxSubdivision =\n      MAX_SUBDIVISION +\n      (destinationResolution\n        ? Math.max(\n            0,\n            Math.ceil(\n              Math.log2(\n                getArea(targetExtent) /\n                  (destinationResolution * destinationResolution * 256 * 256)\n              )\n            )\n          )\n        : 0);\n\n    this.addQuad_(\n      destinationTopLeft,\n      destinationTopRight,\n      destinationBottomRight,\n      destinationBottomLeft,\n      sourceTopLeft,\n      sourceTopRight,\n      sourceBottomRight,\n      sourceBottomLeft,\n      maxSubdivision\n    );\n\n    if (this.wrapsXInSource_) {\n      let leftBound = Infinity;\n      this.triangles_.forEach(function (triangle, i, arr) {\n        leftBound = Math.min(\n          leftBound,\n          triangle.source[0][0],\n          triangle.source[1][0],\n          triangle.source[2][0]\n        );\n      });\n\n      // Shift triangles to be as close to `leftBound` as possible\n      // (if the distance is more than `worldWidth / 2` it can be closer.\n      this.triangles_.forEach((triangle) => {\n        if (\n          Math.max(\n            triangle.source[0][0],\n            triangle.source[1][0],\n            triangle.source[2][0]\n          ) -\n            leftBound >\n          this.sourceWorldWidth_ / 2\n        ) {\n          const newTriangle = [\n            [triangle.source[0][0], triangle.source[0][1]],\n            [triangle.source[1][0], triangle.source[1][1]],\n            [triangle.source[2][0], triangle.source[2][1]],\n          ];\n          if (newTriangle[0][0] - leftBound > this.sourceWorldWidth_ / 2) {\n            newTriangle[0][0] -= this.sourceWorldWidth_;\n          }\n          if (newTriangle[1][0] - leftBound > this.sourceWorldWidth_ / 2) {\n            newTriangle[1][0] -= this.sourceWorldWidth_;\n          }\n          if (newTriangle[2][0] - leftBound > this.sourceWorldWidth_ / 2) {\n            newTriangle[2][0] -= this.sourceWorldWidth_;\n          }\n\n          // Rarely (if the extent contains both the dateline and prime meridian)\n          // the shift can in turn break some triangles.\n          // Detect this here and don't shift in such cases.\n          const minX = Math.min(\n            newTriangle[0][0],\n            newTriangle[1][0],\n            newTriangle[2][0]\n          );\n          const maxX = Math.max(\n            newTriangle[0][0],\n            newTriangle[1][0],\n            newTriangle[2][0]\n          );\n          if (maxX - minX < this.sourceWorldWidth_ / 2) {\n            triangle.source = newTriangle;\n          }\n        }\n      });\n    }\n\n    transformInvCache = {};\n  }\n\n  /**\n   * Adds triangle to the triangulation.\n   * @param {import(\"../coordinate.js\").Coordinate} a The target a coordinate.\n   * @param {import(\"../coordinate.js\").Coordinate} b The target b coordinate.\n   * @param {import(\"../coordinate.js\").Coordinate} c The target c coordinate.\n   * @param {import(\"../coordinate.js\").Coordinate} aSrc The source a coordinate.\n   * @param {import(\"../coordinate.js\").Coordinate} bSrc The source b coordinate.\n   * @param {import(\"../coordinate.js\").Coordinate} cSrc The source c coordinate.\n   * @private\n   */\n  addTriangle_(a, b, c, aSrc, bSrc, cSrc) {\n    this.triangles_.push({\n      source: [aSrc, bSrc, cSrc],\n      target: [a, b, c],\n    });\n  }\n\n  /**\n   * Adds quad (points in clock-wise order) to the triangulation\n   * (and reprojects the vertices) if valid.\n   * Performs quad subdivision if needed to increase precision.\n   *\n   * @param {import(\"../coordinate.js\").Coordinate} a The target a coordinate.\n   * @param {import(\"../coordinate.js\").Coordinate} b The target b coordinate.\n   * @param {import(\"../coordinate.js\").Coordinate} c The target c coordinate.\n   * @param {import(\"../coordinate.js\").Coordinate} d The target d coordinate.\n   * @param {import(\"../coordinate.js\").Coordinate} aSrc The source a coordinate.\n   * @param {import(\"../coordinate.js\").Coordinate} bSrc The source b coordinate.\n   * @param {import(\"../coordinate.js\").Coordinate} cSrc The source c coordinate.\n   * @param {import(\"../coordinate.js\").Coordinate} dSrc The source d coordinate.\n   * @param {number} maxSubdivision Maximal allowed subdivision of the quad.\n   * @private\n   */\n  addQuad_(a, b, c, d, aSrc, bSrc, cSrc, dSrc, maxSubdivision) {\n    const sourceQuadExtent = boundingExtent([aSrc, bSrc, cSrc, dSrc]);\n    const sourceCoverageX = this.sourceWorldWidth_\n      ? getWidth(sourceQuadExtent) / this.sourceWorldWidth_\n      : null;\n    const sourceWorldWidth = /** @type {number} */ (this.sourceWorldWidth_);\n\n    // when the quad is wrapped in the source projection\n    // it covers most of the projection extent, but not fully\n    const wrapsX =\n      this.sourceProj_.canWrapX() &&\n      sourceCoverageX > 0.5 &&\n      sourceCoverageX < 1;\n\n    let needsSubdivision = false;\n\n    if (maxSubdivision > 0) {\n      if (this.targetProj_.isGlobal() && this.targetWorldWidth_) {\n        const targetQuadExtent = boundingExtent([a, b, c, d]);\n        const targetCoverageX =\n          getWidth(targetQuadExtent) / this.targetWorldWidth_;\n        needsSubdivision =\n          targetCoverageX > MAX_TRIANGLE_WIDTH || needsSubdivision;\n      }\n      if (!wrapsX && this.sourceProj_.isGlobal() && sourceCoverageX) {\n        needsSubdivision =\n          sourceCoverageX > MAX_TRIANGLE_WIDTH || needsSubdivision;\n      }\n    }\n\n    if (!needsSubdivision && this.maxSourceExtent_) {\n      if (\n        isFinite(sourceQuadExtent[0]) &&\n        isFinite(sourceQuadExtent[1]) &&\n        isFinite(sourceQuadExtent[2]) &&\n        isFinite(sourceQuadExtent[3])\n      ) {\n        if (!intersects(sourceQuadExtent, this.maxSourceExtent_)) {\n          // whole quad outside source projection extent -> ignore\n          return;\n        }\n      }\n    }\n\n    let isNotFinite = 0;\n\n    if (!needsSubdivision) {\n      if (\n        !isFinite(aSrc[0]) ||\n        !isFinite(aSrc[1]) ||\n        !isFinite(bSrc[0]) ||\n        !isFinite(bSrc[1]) ||\n        !isFinite(cSrc[0]) ||\n        !isFinite(cSrc[1]) ||\n        !isFinite(dSrc[0]) ||\n        !isFinite(dSrc[1])\n      ) {\n        if (maxSubdivision > 0) {\n          needsSubdivision = true;\n        } else {\n          // It might be the case that only 1 of the points is infinite. In this case\n          // we can draw a single triangle with the other three points\n          isNotFinite =\n            (!isFinite(aSrc[0]) || !isFinite(aSrc[1]) ? 8 : 0) +\n            (!isFinite(bSrc[0]) || !isFinite(bSrc[1]) ? 4 : 0) +\n            (!isFinite(cSrc[0]) || !isFinite(cSrc[1]) ? 2 : 0) +\n            (!isFinite(dSrc[0]) || !isFinite(dSrc[1]) ? 1 : 0);\n          if (\n            isNotFinite != 1 &&\n            isNotFinite != 2 &&\n            isNotFinite != 4 &&\n            isNotFinite != 8\n          ) {\n            return;\n          }\n        }\n      }\n    }\n\n    if (maxSubdivision > 0) {\n      if (!needsSubdivision) {\n        const center = [(a[0] + c[0]) / 2, (a[1] + c[1]) / 2];\n        const centerSrc = this.transformInv_(center);\n\n        let dx;\n        if (wrapsX) {\n          const centerSrcEstimX =\n            (modulo(aSrc[0], sourceWorldWidth) +\n              modulo(cSrc[0], sourceWorldWidth)) /\n            2;\n          dx = centerSrcEstimX - modulo(centerSrc[0], sourceWorldWidth);\n        } else {\n          dx = (aSrc[0] + cSrc[0]) / 2 - centerSrc[0];\n        }\n        const dy = (aSrc[1] + cSrc[1]) / 2 - centerSrc[1];\n        const centerSrcErrorSquared = dx * dx + dy * dy;\n        needsSubdivision = centerSrcErrorSquared > this.errorThresholdSquared_;\n      }\n      if (needsSubdivision) {\n        if (Math.abs(a[0] - c[0]) <= Math.abs(a[1] - c[1])) {\n          // split horizontally (top & bottom)\n          const bc = [(b[0] + c[0]) / 2, (b[1] + c[1]) / 2];\n          const bcSrc = this.transformInv_(bc);\n          const da = [(d[0] + a[0]) / 2, (d[1] + a[1]) / 2];\n          const daSrc = this.transformInv_(da);\n\n          this.addQuad_(\n            a,\n            b,\n            bc,\n            da,\n            aSrc,\n            bSrc,\n            bcSrc,\n            daSrc,\n            maxSubdivision - 1\n          );\n          this.addQuad_(\n            da,\n            bc,\n            c,\n            d,\n            daSrc,\n            bcSrc,\n            cSrc,\n            dSrc,\n            maxSubdivision - 1\n          );\n        } else {\n          // split vertically (left & right)\n          const ab = [(a[0] + b[0]) / 2, (a[1] + b[1]) / 2];\n          const abSrc = this.transformInv_(ab);\n          const cd = [(c[0] + d[0]) / 2, (c[1] + d[1]) / 2];\n          const cdSrc = this.transformInv_(cd);\n\n          this.addQuad_(\n            a,\n            ab,\n            cd,\n            d,\n            aSrc,\n            abSrc,\n            cdSrc,\n            dSrc,\n            maxSubdivision - 1\n          );\n          this.addQuad_(\n            ab,\n            b,\n            c,\n            cd,\n            abSrc,\n            bSrc,\n            cSrc,\n            cdSrc,\n            maxSubdivision - 1\n          );\n        }\n        return;\n      }\n    }\n\n    if (wrapsX) {\n      if (!this.canWrapXInSource_) {\n        return;\n      }\n      this.wrapsXInSource_ = true;\n    }\n\n    // Exactly zero or one of *Src is not finite\n    // The triangles must have the diagonal line as the first side\n    // This is to allow easy code in reproj.s to make it straight for broken\n    // browsers that can't handle diagonal clipping\n    if ((isNotFinite & 0xb) == 0) {\n      this.addTriangle_(a, c, d, aSrc, cSrc, dSrc);\n    }\n    if ((isNotFinite & 0xe) == 0) {\n      this.addTriangle_(a, c, b, aSrc, cSrc, bSrc);\n    }\n    if (isNotFinite) {\n      // Try the other two triangles\n      if ((isNotFinite & 0xd) == 0) {\n        this.addTriangle_(b, d, a, bSrc, dSrc, aSrc);\n      }\n      if ((isNotFinite & 0x7) == 0) {\n        this.addTriangle_(b, d, c, bSrc, dSrc, cSrc);\n      }\n    }\n  }\n\n  /**\n   * Calculates extent of the `source` coordinates from all the triangles.\n   *\n   * @return {import(\"../extent.js\").Extent} Calculated extent.\n   */\n  calculateSourceExtent() {\n    const extent = createEmpty();\n\n    this.triangles_.forEach(function (triangle, i, arr) {\n      const src = triangle.source;\n      extendCoordinate(extent, src[0]);\n      extendCoordinate(extent, src[1]);\n      extendCoordinate(extent, src[2]);\n    });\n\n    return extent;\n  }\n\n  /**\n   * @return {Array<Triangle>} Array of the calculated triangles.\n   */\n  getTriangles() {\n    return this.triangles_;\n  }\n}\n\nexport default Triangulation;\n","/**\n * @module ol/reproj/Tile\n */\nimport {ERROR_THRESHOLD} from './common.js';\n\nimport EventType from '../events/EventType.js';\nimport Tile from '../Tile.js';\nimport TileState from '../TileState.js';\nimport Triangulation from './Triangulation.js';\nimport {\n  calculateSourceExtentResolution,\n  canvasPool,\n  render as renderReprojected,\n} from '../reproj.js';\nimport {clamp} from '../math.js';\nimport {getArea, getIntersection} from '../extent.js';\nimport {listen, unlistenByKey} from '../events.js';\nimport {releaseCanvas} from '../dom.js';\n\n/**\n * @typedef {function(number, number, number, number) : (import(\"../ImageTile.js\").default)} FunctionType\n */\n\n/**\n * @classdesc\n * Class encapsulating single reprojected tile.\n * See {@link module:ol/source/TileImage~TileImage}.\n *\n */\nclass ReprojTile extends Tile {\n  /**\n   * @param {import(\"../proj/Projection.js\").default} sourceProj Source projection.\n   * @param {import(\"../tilegrid/TileGrid.js\").default} sourceTileGrid Source tile grid.\n   * @param {import(\"../proj/Projection.js\").default} targetProj Target projection.\n   * @param {import(\"../tilegrid/TileGrid.js\").default} targetTileGrid Target tile grid.\n   * @param {import(\"../tilecoord.js\").TileCoord} tileCoord Coordinate of the tile.\n   * @param {import(\"../tilecoord.js\").TileCoord} wrappedTileCoord Coordinate of the tile wrapped in X.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {number} gutter Gutter of the source tiles.\n   * @param {FunctionType} getTileFunction\n   *     Function returning source tiles (z, x, y, pixelRatio).\n   * @param {number} [errorThreshold] Acceptable reprojection error (in px).\n   * @param {boolean} [renderEdges] Render reprojection edges.\n   * @param {boolean} [interpolate] Use linear interpolation when resampling.\n   */\n  constructor(\n    sourceProj,\n    sourceTileGrid,\n    targetProj,\n    targetTileGrid,\n    tileCoord,\n    wrappedTileCoord,\n    pixelRatio,\n    gutter,\n    getTileFunction,\n    errorThreshold,\n    renderEdges,\n    interpolate\n  ) {\n    super(tileCoord, TileState.IDLE, {interpolate: !!interpolate});\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.renderEdges_ = renderEdges !== undefined ? renderEdges : false;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.pixelRatio_ = pixelRatio;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.gutter_ = gutter;\n\n    /**\n     * @private\n     * @type {HTMLCanvasElement}\n     */\n    this.canvas_ = null;\n\n    /**\n     * @private\n     * @type {import(\"../tilegrid/TileGrid.js\").default}\n     */\n    this.sourceTileGrid_ = sourceTileGrid;\n\n    /**\n     * @private\n     * @type {import(\"../tilegrid/TileGrid.js\").default}\n     */\n    this.targetTileGrid_ = targetTileGrid;\n\n    /**\n     * @private\n     * @type {import(\"../tilecoord.js\").TileCoord}\n     */\n    this.wrappedTileCoord_ = wrappedTileCoord ? wrappedTileCoord : tileCoord;\n\n    /**\n     * @private\n     * @type {!Array<import(\"../ImageTile.js\").default>}\n     */\n    this.sourceTiles_ = [];\n\n    /**\n     * @private\n     * @type {?Array<import(\"../events.js\").EventsKey>}\n     */\n    this.sourcesListenerKeys_ = null;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.sourceZ_ = 0;\n\n    const targetExtent = targetTileGrid.getTileCoordExtent(\n      this.wrappedTileCoord_\n    );\n    const maxTargetExtent = this.targetTileGrid_.getExtent();\n    let maxSourceExtent = this.sourceTileGrid_.getExtent();\n\n    const limitedTargetExtent = maxTargetExtent\n      ? getIntersection(targetExtent, maxTargetExtent)\n      : targetExtent;\n\n    if (getArea(limitedTargetExtent) === 0) {\n      // Tile is completely outside range -> EMPTY\n      // TODO: is it actually correct that the source even creates the tile ?\n      this.state = TileState.EMPTY;\n      return;\n    }\n\n    const sourceProjExtent = sourceProj.getExtent();\n    if (sourceProjExtent) {\n      if (!maxSourceExtent) {\n        maxSourceExtent = sourceProjExtent;\n      } else {\n        maxSourceExtent = getIntersection(maxSourceExtent, sourceProjExtent);\n      }\n    }\n\n    const targetResolution = targetTileGrid.getResolution(\n      this.wrappedTileCoord_[0]\n    );\n\n    const sourceResolution = calculateSourceExtentResolution(\n      sourceProj,\n      targetProj,\n      limitedTargetExtent,\n      targetResolution\n    );\n\n    if (!isFinite(sourceResolution) || sourceResolution <= 0) {\n      // invalid sourceResolution -> EMPTY\n      // probably edges of the projections when no extent is defined\n      this.state = TileState.EMPTY;\n      return;\n    }\n\n    const errorThresholdInPixels =\n      errorThreshold !== undefined ? errorThreshold : ERROR_THRESHOLD;\n\n    /**\n     * @private\n     * @type {!import(\"./Triangulation.js\").default}\n     */\n    this.triangulation_ = new Triangulation(\n      sourceProj,\n      targetProj,\n      limitedTargetExtent,\n      maxSourceExtent,\n      sourceResolution * errorThresholdInPixels,\n      targetResolution\n    );\n\n    if (this.triangulation_.getTriangles().length === 0) {\n      // no valid triangles -> EMPTY\n      this.state = TileState.EMPTY;\n      return;\n    }\n\n    this.sourceZ_ = sourceTileGrid.getZForResolution(sourceResolution);\n    let sourceExtent = this.triangulation_.calculateSourceExtent();\n\n    if (maxSourceExtent) {\n      if (sourceProj.canWrapX()) {\n        sourceExtent[1] = clamp(\n          sourceExtent[1],\n          maxSourceExtent[1],\n          maxSourceExtent[3]\n        );\n        sourceExtent[3] = clamp(\n          sourceExtent[3],\n          maxSourceExtent[1],\n          maxSourceExtent[3]\n        );\n      } else {\n        sourceExtent = getIntersection(sourceExtent, maxSourceExtent);\n      }\n    }\n\n    if (!getArea(sourceExtent)) {\n      this.state = TileState.EMPTY;\n    } else {\n      const sourceRange = sourceTileGrid.getTileRangeForExtentAndZ(\n        sourceExtent,\n        this.sourceZ_\n      );\n\n      for (let srcX = sourceRange.minX; srcX <= sourceRange.maxX; srcX++) {\n        for (let srcY = sourceRange.minY; srcY <= sourceRange.maxY; srcY++) {\n          const tile = getTileFunction(this.sourceZ_, srcX, srcY, pixelRatio);\n          if (tile) {\n            this.sourceTiles_.push(tile);\n          }\n        }\n      }\n\n      if (this.sourceTiles_.length === 0) {\n        this.state = TileState.EMPTY;\n      }\n    }\n  }\n\n  /**\n   * Get the HTML Canvas element for this tile.\n   * @return {HTMLCanvasElement} Canvas.\n   */\n  getImage() {\n    return this.canvas_;\n  }\n\n  /**\n   * @private\n   */\n  reproject_() {\n    const sources = [];\n    this.sourceTiles_.forEach((tile) => {\n      if (tile && tile.getState() == TileState.LOADED) {\n        sources.push({\n          extent: this.sourceTileGrid_.getTileCoordExtent(tile.tileCoord),\n          image: tile.getImage(),\n        });\n      }\n    });\n    this.sourceTiles_.length = 0;\n\n    if (sources.length === 0) {\n      this.state = TileState.ERROR;\n    } else {\n      const z = this.wrappedTileCoord_[0];\n      const size = this.targetTileGrid_.getTileSize(z);\n      const width = typeof size === 'number' ? size : size[0];\n      const height = typeof size === 'number' ? size : size[1];\n      const targetResolution = this.targetTileGrid_.getResolution(z);\n      const sourceResolution = this.sourceTileGrid_.getResolution(\n        this.sourceZ_\n      );\n\n      const targetExtent = this.targetTileGrid_.getTileCoordExtent(\n        this.wrappedTileCoord_\n      );\n\n      this.canvas_ = renderReprojected(\n        width,\n        height,\n        this.pixelRatio_,\n        sourceResolution,\n        this.sourceTileGrid_.getExtent(),\n        targetResolution,\n        targetExtent,\n        this.triangulation_,\n        sources,\n        this.gutter_,\n        this.renderEdges_,\n        this.interpolate\n      );\n\n      this.state = TileState.LOADED;\n    }\n    this.changed();\n  }\n\n  /**\n   * Load not yet loaded URI.\n   */\n  load() {\n    if (this.state == TileState.IDLE) {\n      this.state = TileState.LOADING;\n      this.changed();\n\n      let leftToLoad = 0;\n\n      this.sourcesListenerKeys_ = [];\n      this.sourceTiles_.forEach((tile) => {\n        const state = tile.getState();\n        if (state == TileState.IDLE || state == TileState.LOADING) {\n          leftToLoad++;\n\n          const sourceListenKey = listen(\n            tile,\n            EventType.CHANGE,\n            function (e) {\n              const state = tile.getState();\n              if (\n                state == TileState.LOADED ||\n                state == TileState.ERROR ||\n                state == TileState.EMPTY\n              ) {\n                unlistenByKey(sourceListenKey);\n                leftToLoad--;\n                if (leftToLoad === 0) {\n                  this.unlistenSources_();\n                  this.reproject_();\n                }\n              }\n            },\n            this\n          );\n          this.sourcesListenerKeys_.push(sourceListenKey);\n        }\n      });\n\n      if (leftToLoad === 0) {\n        setTimeout(this.reproject_.bind(this), 0);\n      } else {\n        this.sourceTiles_.forEach(function (tile, i, arr) {\n          const state = tile.getState();\n          if (state == TileState.IDLE) {\n            tile.load();\n          }\n        });\n      }\n    }\n  }\n\n  /**\n   * @private\n   */\n  unlistenSources_() {\n    this.sourcesListenerKeys_.forEach(unlistenByKey);\n    this.sourcesListenerKeys_ = null;\n  }\n\n  /**\n   * Remove from the cache due to expiry\n   */\n  release() {\n    if (this.canvas_) {\n      releaseCanvas(this.canvas_.getContext('2d'));\n      canvasPool.push(this.canvas_);\n      this.canvas_ = null;\n    }\n    super.release();\n  }\n}\n\nexport default ReprojTile;\n","/**\n * @module ol/source/TileEventType\n */\n\n/**\n * @enum {string}\n */\nexport default {\n  /**\n   * Triggered when a tile starts loading.\n   * @event module:ol/source/Tile.TileSourceEvent#tileloadstart\n   * @api\n   */\n  TILELOADSTART: 'tileloadstart',\n\n  /**\n   * Triggered when a tile finishes loading, either when its data is loaded,\n   * or when loading was aborted because the tile is no longer needed.\n   * @event module:ol/source/Tile.TileSourceEvent#tileloadend\n   * @api\n   */\n  TILELOADEND: 'tileloadend',\n\n  /**\n   * Triggered if tile loading results in an error. Note that this is not the\n   * right place to re-fetch tiles. See {@link module:ol/ImageTile~ImageTile#load}\n   * for details.\n   * @event module:ol/source/Tile.TileSourceEvent#tileloaderror\n   * @api\n   */\n  TILELOADERROR: 'tileloaderror',\n};\n\n/**\n * @typedef {'tileloadstart'|'tileloadend'|'tileloaderror'} TileSourceEventTypes\n */\n","/**\n * @module ol/source/Source\n */\nimport BaseObject from '../Object.js';\nimport {get as getProjection} from '../proj.js';\n\n/**\n * @typedef {'undefined' | 'loading' | 'ready' | 'error'} State\n * State of the source, one of 'undefined', 'loading', 'ready' or 'error'.\n */\n\n/**\n * A function that takes a {@link import(\"../View.js\").ViewStateLayerStateExtent} and returns a string or\n * an array of strings representing source attributions.\n *\n * @typedef {function(import(\"../View.js\").ViewStateLayerStateExtent): (string|Array<string>)} Attribution\n */\n\n/**\n * A type that can be used to provide attribution information for data sources.\n *\n * It represents either\n * * a simple string (e.g. `'© Acme Inc.'`)\n * * an array of simple strings (e.g. `['© Acme Inc.', '© Bacme Inc.']`)\n * * a function that returns a string or array of strings ({@link module:ol/source/Source~Attribution})\n *\n * @typedef {string|Array<string>|Attribution} AttributionLike\n */\n\n/**\n * @typedef {Object} Options\n * @property {AttributionLike} [attributions] Attributions.\n * @property {boolean} [attributionsCollapsible=true] Attributions are collapsible.\n * @property {import(\"../proj.js\").ProjectionLike} [projection] Projection. Default is the view projection.\n * @property {import(\"./Source.js\").State} [state='ready'] State.\n * @property {boolean} [wrapX=false] WrapX.\n * @property {boolean} [interpolate=false] Use interpolated values when resampling.  By default,\n * the nearest neighbor is used when resampling.\n */\n\n/**\n * @classdesc\n * Abstract base class; normally only used for creating subclasses and not\n * instantiated in apps.\n * Base class for {@link module:ol/layer/Layer~Layer} sources.\n *\n * A generic `change` event is triggered when the state of the source changes.\n * @abstract\n * @api\n */\nclass Source extends BaseObject {\n  /**\n   * @param {Options} options Source options.\n   */\n  constructor(options) {\n    super();\n\n    /**\n     * @protected\n     * @type {import(\"../proj/Projection.js\").default|null}\n     */\n    this.projection = getProjection(options.projection);\n\n    /**\n     * @private\n     * @type {?Attribution}\n     */\n    this.attributions_ = adaptAttributions(options.attributions);\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.attributionsCollapsible_ =\n      options.attributionsCollapsible !== undefined\n        ? options.attributionsCollapsible\n        : true;\n\n    /**\n     * This source is currently loading data. Sources that defer loading to the\n     * map's tile queue never set this to `true`.\n     * @type {boolean}\n     */\n    this.loading = false;\n\n    /**\n     * @private\n     * @type {import(\"./Source.js\").State}\n     */\n    this.state_ = options.state !== undefined ? options.state : 'ready';\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.wrapX_ = options.wrapX !== undefined ? options.wrapX : false;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.interpolate_ = !!options.interpolate;\n\n    /**\n     * @protected\n     * @type {function(import(\"../View.js\").ViewOptions):void}\n     */\n    this.viewResolver = null;\n\n    /**\n     * @protected\n     * @type {function(Error):void}\n     */\n    this.viewRejector = null;\n\n    const self = this;\n    /**\n     * @private\n     * @type {Promise<import(\"../View.js\").ViewOptions>}\n     */\n    this.viewPromise_ = new Promise(function (resolve, reject) {\n      self.viewResolver = resolve;\n      self.viewRejector = reject;\n    });\n  }\n\n  /**\n   * Get the attribution function for the source.\n   * @return {?Attribution} Attribution function.\n   * @api\n   */\n  getAttributions() {\n    return this.attributions_;\n  }\n\n  /**\n   * @return {boolean} Attributions are collapsible.\n   * @api\n   */\n  getAttributionsCollapsible() {\n    return this.attributionsCollapsible_;\n  }\n\n  /**\n   * Get the projection of the source.\n   * @return {import(\"../proj/Projection.js\").default|null} Projection.\n   * @api\n   */\n  getProjection() {\n    return this.projection;\n  }\n\n  /**\n   * @param {import(\"../proj/Projection\").default} [projection] Projection.\n   * @return {Array<number>|null} Resolutions.\n   */\n  getResolutions(projection) {\n    return null;\n  }\n\n  /**\n   * @return {Promise<import(\"../View.js\").ViewOptions>} A promise for view-related properties.\n   */\n  getView() {\n    return this.viewPromise_;\n  }\n\n  /**\n   * Get the state of the source, see {@link import(\"./Source.js\").State} for possible states.\n   * @return {import(\"./Source.js\").State} State.\n   * @api\n   */\n  getState() {\n    return this.state_;\n  }\n\n  /**\n   * @return {boolean|undefined} Wrap X.\n   */\n  getWrapX() {\n    return this.wrapX_;\n  }\n\n  /**\n   * @return {boolean} Use linear interpolation when resampling.\n   */\n  getInterpolate() {\n    return this.interpolate_;\n  }\n\n  /**\n   * Refreshes the source. The source will be cleared, and data from the server will be reloaded.\n   * @api\n   */\n  refresh() {\n    this.changed();\n  }\n\n  /**\n   * Set the attributions of the source.\n   * @param {AttributionLike|undefined} attributions Attributions.\n   *     Can be passed as `string`, `Array<string>`, {@link module:ol/source/Source~Attribution},\n   *     or `undefined`.\n   * @api\n   */\n  setAttributions(attributions) {\n    this.attributions_ = adaptAttributions(attributions);\n    this.changed();\n  }\n\n  /**\n   * Set the state of the source.\n   * @param {import(\"./Source.js\").State} state State.\n   */\n  setState(state) {\n    this.state_ = state;\n    this.changed();\n  }\n}\n\n/**\n * Turns the attributions option into an attributions function.\n * @param {AttributionLike|undefined} attributionLike The attribution option.\n * @return {Attribution|null} An attribution function (or null).\n */\nfunction adaptAttributions(attributionLike) {\n  if (!attributionLike) {\n    return null;\n  }\n  if (Array.isArray(attributionLike)) {\n    return function (frameState) {\n      return attributionLike;\n    };\n  }\n\n  if (typeof attributionLike === 'function') {\n    return attributionLike;\n  }\n\n  return function (frameState) {\n    return [attributionLike];\n  };\n}\n\nexport default Source;\n","/**\n * @module ol/tilegrid/TileGrid\n */\nimport TileRange, {\n  createOrUpdate as createOrUpdateTileRange,\n} from '../TileRange.js';\nimport {DEFAULT_TILE_SIZE} from './common.js';\nimport {assert} from '../asserts.js';\nimport {ceil, clamp, floor} from '../math.js';\nimport {createOrUpdate, getTopLeft} from '../extent.js';\nimport {createOrUpdate as createOrUpdateTileCoord} from '../tilecoord.js';\nimport {intersectsLinearRing} from '../geom/flat/intersectsextent.js';\nimport {isSorted, linearFindNearest} from '../array.js';\nimport {toSize} from '../size.js';\n\n/**\n * @private\n * @type {import(\"../tilecoord.js\").TileCoord}\n */\nconst tmpTileCoord = [0, 0, 0];\n\n/**\n * Number of decimal digits to consider in integer values when rounding.\n * @type {number}\n */\nconst DECIMALS = 5;\n\n/**\n * @typedef {Object} Options\n * @property {import(\"../extent.js\").Extent} [extent] Extent for the tile grid. No tiles outside this\n * extent will be requested by {@link module:ol/source/Tile~TileSource} sources. When no `origin` or\n * `origins` are configured, the `origin` will be set to the top-left corner of the extent.\n * @property {number} [minZoom=0] Minimum zoom.\n * @property {import(\"../coordinate.js\").Coordinate} [origin] The tile grid origin, i.e. where the `x`\n * and `y` axes meet (`[z, 0, 0]`). Tile coordinates increase left to right and downwards. If not\n * specified, `extent` or `origins` must be provided.\n * @property {Array<import(\"../coordinate.js\").Coordinate>} [origins] Tile grid origins, i.e. where\n * the `x` and `y` axes meet (`[z, 0, 0]`), for each zoom level. If given, the array length\n * should match the length of the `resolutions` array, i.e. each resolution can have a different\n * origin. Tile coordinates increase left to right and downwards. If not specified, `extent` or\n * `origin` must be provided.\n * @property {!Array<number>} resolutions Resolutions. The array index of each resolution needs\n * to match the zoom level. This means that even if a `minZoom` is configured, the resolutions\n * array will have a length of `maxZoom + 1`.\n * @property {Array<import(\"../size.js\").Size>} [sizes] Number of tile rows and columns\n * of the grid for each zoom level. If specified the values\n * define each zoom level's extent together with the `origin` or `origins`.\n * A grid `extent` can be configured in addition, and will further limit the extent\n * for which tile requests are made by sources. If the bottom-left corner of\n * an extent is used as `origin` or `origins`, then the `y` value must be\n * negative because OpenLayers tile coordinates use the top left as the origin.\n * @property {number|import(\"../size.js\").Size} [tileSize] Tile size.\n * Default is `[256, 256]`.\n * @property {Array<number|import(\"../size.js\").Size>} [tileSizes] Tile sizes. If given, the array length\n * should match the length of the `resolutions` array, i.e. each resolution can have a different\n * tile size.\n */\n\n/**\n * @classdesc\n * Base class for setting the grid pattern for sources accessing tiled-image\n * servers.\n * @api\n */\nclass TileGrid {\n  /**\n   * @param {Options} options Tile grid options.\n   */\n  constructor(options) {\n    /**\n     * @protected\n     * @type {number}\n     */\n    this.minZoom = options.minZoom !== undefined ? options.minZoom : 0;\n\n    /**\n     * @private\n     * @type {!Array<number>}\n     */\n    this.resolutions_ = options.resolutions;\n    assert(\n      isSorted(\n        this.resolutions_,\n        function (a, b) {\n          return b - a;\n        },\n        true\n      ),\n      17\n    ); // `resolutions` must be sorted in descending order\n\n    // check if we've got a consistent zoom factor and origin\n    let zoomFactor;\n    if (!options.origins) {\n      for (let i = 0, ii = this.resolutions_.length - 1; i < ii; ++i) {\n        if (!zoomFactor) {\n          zoomFactor = this.resolutions_[i] / this.resolutions_[i + 1];\n        } else {\n          if (this.resolutions_[i] / this.resolutions_[i + 1] !== zoomFactor) {\n            zoomFactor = undefined;\n            break;\n          }\n        }\n      }\n    }\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.zoomFactor_ = zoomFactor;\n\n    /**\n     * @protected\n     * @type {number}\n     */\n    this.maxZoom = this.resolutions_.length - 1;\n\n    /**\n     * @private\n     * @type {import(\"../coordinate.js\").Coordinate|null}\n     */\n    this.origin_ = options.origin !== undefined ? options.origin : null;\n\n    /**\n     * @private\n     * @type {Array<import(\"../coordinate.js\").Coordinate>}\n     */\n    this.origins_ = null;\n    if (options.origins !== undefined) {\n      this.origins_ = options.origins;\n      assert(this.origins_.length == this.resolutions_.length, 20); // Number of `origins` and `resolutions` must be equal\n    }\n\n    const extent = options.extent;\n\n    if (extent !== undefined && !this.origin_ && !this.origins_) {\n      this.origin_ = getTopLeft(extent);\n    }\n\n    assert(\n      (!this.origin_ && this.origins_) || (this.origin_ && !this.origins_),\n      18\n    ); // Either `origin` or `origins` must be configured, never both\n\n    /**\n     * @private\n     * @type {Array<number|import(\"../size.js\").Size>}\n     */\n    this.tileSizes_ = null;\n    if (options.tileSizes !== undefined) {\n      this.tileSizes_ = options.tileSizes;\n      assert(this.tileSizes_.length == this.resolutions_.length, 19); // Number of `tileSizes` and `resolutions` must be equal\n    }\n\n    /**\n     * @private\n     * @type {number|import(\"../size.js\").Size}\n     */\n    this.tileSize_ =\n      options.tileSize !== undefined\n        ? options.tileSize\n        : !this.tileSizes_\n        ? DEFAULT_TILE_SIZE\n        : null;\n    assert(\n      (!this.tileSize_ && this.tileSizes_) ||\n        (this.tileSize_ && !this.tileSizes_),\n      22\n    ); // Either `tileSize` or `tileSizes` must be configured, never both\n\n    /**\n     * @private\n     * @type {import(\"../extent.js\").Extent}\n     */\n    this.extent_ = extent !== undefined ? extent : null;\n\n    /**\n     * @private\n     * @type {Array<import(\"../TileRange.js\").default>}\n     */\n    this.fullTileRanges_ = null;\n\n    /**\n     * @private\n     * @type {import(\"../size.js\").Size}\n     */\n    this.tmpSize_ = [0, 0];\n\n    /**\n     * @private\n     * @type {import(\"../extent.js\").Extent}\n     */\n    this.tmpExtent_ = [0, 0, 0, 0];\n\n    if (options.sizes !== undefined) {\n      this.fullTileRanges_ = options.sizes.map(function (size, z) {\n        const tileRange = new TileRange(\n          Math.min(0, size[0]),\n          Math.max(size[0] - 1, -1),\n          Math.min(0, size[1]),\n          Math.max(size[1] - 1, -1)\n        );\n        if (extent) {\n          const restrictedTileRange = this.getTileRangeForExtentAndZ(extent, z);\n          tileRange.minX = Math.max(restrictedTileRange.minX, tileRange.minX);\n          tileRange.maxX = Math.min(restrictedTileRange.maxX, tileRange.maxX);\n          tileRange.minY = Math.max(restrictedTileRange.minY, tileRange.minY);\n          tileRange.maxY = Math.min(restrictedTileRange.maxY, tileRange.maxY);\n        }\n        return tileRange;\n      }, this);\n    } else if (extent) {\n      this.calculateTileRanges_(extent);\n    }\n  }\n\n  /**\n   * Call a function with each tile coordinate for a given extent and zoom level.\n   *\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @param {number} zoom Integer zoom level.\n   * @param {function(import(\"../tilecoord.js\").TileCoord): void} callback Function called with each tile coordinate.\n   * @api\n   */\n  forEachTileCoord(extent, zoom, callback) {\n    const tileRange = this.getTileRangeForExtentAndZ(extent, zoom);\n    for (let i = tileRange.minX, ii = tileRange.maxX; i <= ii; ++i) {\n      for (let j = tileRange.minY, jj = tileRange.maxY; j <= jj; ++j) {\n        callback([zoom, i, j]);\n      }\n    }\n  }\n\n  /**\n   * @param {import(\"../tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n   * @param {function(number, import(\"../TileRange.js\").default): boolean} callback Callback.\n   * @param {import(\"../TileRange.js\").default} [tempTileRange] Temporary import(\"../TileRange.js\").default object.\n   * @param {import(\"../extent.js\").Extent} [tempExtent] Temporary import(\"../extent.js\").Extent object.\n   * @return {boolean} Callback succeeded.\n   */\n  forEachTileCoordParentTileRange(\n    tileCoord,\n    callback,\n    tempTileRange,\n    tempExtent\n  ) {\n    let tileRange, x, y;\n    let tileCoordExtent = null;\n    let z = tileCoord[0] - 1;\n    if (this.zoomFactor_ === 2) {\n      x = tileCoord[1];\n      y = tileCoord[2];\n    } else {\n      tileCoordExtent = this.getTileCoordExtent(tileCoord, tempExtent);\n    }\n    while (z >= this.minZoom) {\n      if (this.zoomFactor_ === 2) {\n        x = Math.floor(x / 2);\n        y = Math.floor(y / 2);\n        tileRange = createOrUpdateTileRange(x, x, y, y, tempTileRange);\n      } else {\n        tileRange = this.getTileRangeForExtentAndZ(\n          tileCoordExtent,\n          z,\n          tempTileRange\n        );\n      }\n      if (callback(z, tileRange)) {\n        return true;\n      }\n      --z;\n    }\n    return false;\n  }\n\n  /**\n   * Get the extent for this tile grid, if it was configured.\n   * @return {import(\"../extent.js\").Extent} Extent.\n   * @api\n   */\n  getExtent() {\n    return this.extent_;\n  }\n\n  /**\n   * Get the maximum zoom level for the grid.\n   * @return {number} Max zoom.\n   * @api\n   */\n  getMaxZoom() {\n    return this.maxZoom;\n  }\n\n  /**\n   * Get the minimum zoom level for the grid.\n   * @return {number} Min zoom.\n   * @api\n   */\n  getMinZoom() {\n    return this.minZoom;\n  }\n\n  /**\n   * Get the origin for the grid at the given zoom level.\n   * @param {number} z Integer zoom level.\n   * @return {import(\"../coordinate.js\").Coordinate} Origin.\n   * @api\n   */\n  getOrigin(z) {\n    if (this.origin_) {\n      return this.origin_;\n    }\n    return this.origins_[z];\n  }\n\n  /**\n   * Get the resolution for the given zoom level.\n   * @param {number} z Integer zoom level.\n   * @return {number} Resolution.\n   * @api\n   */\n  getResolution(z) {\n    return this.resolutions_[z];\n  }\n\n  /**\n   * Get the list of resolutions for the tile grid.\n   * @return {Array<number>} Resolutions.\n   * @api\n   */\n  getResolutions() {\n    return this.resolutions_;\n  }\n\n  /**\n   * @param {import(\"../tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n   * @param {import(\"../TileRange.js\").default} [tempTileRange] Temporary import(\"../TileRange.js\").default object.\n   * @param {import(\"../extent.js\").Extent} [tempExtent] Temporary import(\"../extent.js\").Extent object.\n   * @return {import(\"../TileRange.js\").default|null} Tile range.\n   */\n  getTileCoordChildTileRange(tileCoord, tempTileRange, tempExtent) {\n    if (tileCoord[0] < this.maxZoom) {\n      if (this.zoomFactor_ === 2) {\n        const minX = tileCoord[1] * 2;\n        const minY = tileCoord[2] * 2;\n        return createOrUpdateTileRange(\n          minX,\n          minX + 1,\n          minY,\n          minY + 1,\n          tempTileRange\n        );\n      }\n      const tileCoordExtent = this.getTileCoordExtent(\n        tileCoord,\n        tempExtent || this.tmpExtent_\n      );\n      return this.getTileRangeForExtentAndZ(\n        tileCoordExtent,\n        tileCoord[0] + 1,\n        tempTileRange\n      );\n    }\n    return null;\n  }\n\n  /**\n   * @param {import(\"../tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n   * @param {number} z Integer zoom level.\n   * @param {import(\"../TileRange.js\").default} [tempTileRange] Temporary import(\"../TileRange.js\").default object.\n   * @return {import(\"../TileRange.js\").default|null} Tile range.\n   */\n  getTileRangeForTileCoordAndZ(tileCoord, z, tempTileRange) {\n    if (z > this.maxZoom || z < this.minZoom) {\n      return null;\n    }\n\n    const tileCoordZ = tileCoord[0];\n    const tileCoordX = tileCoord[1];\n    const tileCoordY = tileCoord[2];\n\n    if (z === tileCoordZ) {\n      return createOrUpdateTileRange(\n        tileCoordX,\n        tileCoordY,\n        tileCoordX,\n        tileCoordY,\n        tempTileRange\n      );\n    }\n\n    if (this.zoomFactor_) {\n      const factor = Math.pow(this.zoomFactor_, z - tileCoordZ);\n      const minX = Math.floor(tileCoordX * factor);\n      const minY = Math.floor(tileCoordY * factor);\n      if (z < tileCoordZ) {\n        return createOrUpdateTileRange(minX, minX, minY, minY, tempTileRange);\n      }\n\n      const maxX = Math.floor(factor * (tileCoordX + 1)) - 1;\n      const maxY = Math.floor(factor * (tileCoordY + 1)) - 1;\n      return createOrUpdateTileRange(minX, maxX, minY, maxY, tempTileRange);\n    }\n\n    const tileCoordExtent = this.getTileCoordExtent(tileCoord, this.tmpExtent_);\n    return this.getTileRangeForExtentAndZ(tileCoordExtent, z, tempTileRange);\n  }\n\n  /**\n   * Get a tile range for the given extent and integer zoom level.\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @param {number} z Integer zoom level.\n   * @param {import(\"../TileRange.js\").default} [tempTileRange] Temporary tile range object.\n   * @return {import(\"../TileRange.js\").default} Tile range.\n   */\n  getTileRangeForExtentAndZ(extent, z, tempTileRange) {\n    this.getTileCoordForXYAndZ_(extent[0], extent[3], z, false, tmpTileCoord);\n    const minX = tmpTileCoord[1];\n    const minY = tmpTileCoord[2];\n    this.getTileCoordForXYAndZ_(extent[2], extent[1], z, true, tmpTileCoord);\n    const maxX = tmpTileCoord[1];\n    const maxY = tmpTileCoord[2];\n    return createOrUpdateTileRange(minX, maxX, minY, maxY, tempTileRange);\n  }\n\n  /**\n   * @param {import(\"../tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n   * @return {import(\"../coordinate.js\").Coordinate} Tile center.\n   */\n  getTileCoordCenter(tileCoord) {\n    const origin = this.getOrigin(tileCoord[0]);\n    const resolution = this.getResolution(tileCoord[0]);\n    const tileSize = toSize(this.getTileSize(tileCoord[0]), this.tmpSize_);\n    return [\n      origin[0] + (tileCoord[1] + 0.5) * tileSize[0] * resolution,\n      origin[1] - (tileCoord[2] + 0.5) * tileSize[1] * resolution,\n    ];\n  }\n\n  /**\n   * Get the extent of a tile coordinate.\n   *\n   * @param {import(\"../tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n   * @param {import(\"../extent.js\").Extent} [tempExtent] Temporary extent object.\n   * @return {import(\"../extent.js\").Extent} Extent.\n   * @api\n   */\n  getTileCoordExtent(tileCoord, tempExtent) {\n    const origin = this.getOrigin(tileCoord[0]);\n    const resolution = this.getResolution(tileCoord[0]);\n    const tileSize = toSize(this.getTileSize(tileCoord[0]), this.tmpSize_);\n    const minX = origin[0] + tileCoord[1] * tileSize[0] * resolution;\n    const minY = origin[1] - (tileCoord[2] + 1) * tileSize[1] * resolution;\n    const maxX = minX + tileSize[0] * resolution;\n    const maxY = minY + tileSize[1] * resolution;\n    return createOrUpdate(minX, minY, maxX, maxY, tempExtent);\n  }\n\n  /**\n   * Get the tile coordinate for the given map coordinate and resolution.  This\n   * method considers that coordinates that intersect tile boundaries should be\n   * assigned the higher tile coordinate.\n   *\n   * @param {import(\"../coordinate.js\").Coordinate} coordinate Coordinate.\n   * @param {number} resolution Resolution.\n   * @param {import(\"../tilecoord.js\").TileCoord} [opt_tileCoord] Destination import(\"../tilecoord.js\").TileCoord object.\n   * @return {import(\"../tilecoord.js\").TileCoord} Tile coordinate.\n   * @api\n   */\n  getTileCoordForCoordAndResolution(coordinate, resolution, opt_tileCoord) {\n    return this.getTileCoordForXYAndResolution_(\n      coordinate[0],\n      coordinate[1],\n      resolution,\n      false,\n      opt_tileCoord\n    );\n  }\n\n  /**\n   * Note that this method should not be called for resolutions that correspond\n   * to an integer zoom level.  Instead call the `getTileCoordForXYAndZ_` method.\n   * @param {number} x X.\n   * @param {number} y Y.\n   * @param {number} resolution Resolution (for a non-integer zoom level).\n   * @param {boolean} reverseIntersectionPolicy Instead of letting edge\n   *     intersections go to the higher tile coordinate, let edge intersections\n   *     go to the lower tile coordinate.\n   * @param {import(\"../tilecoord.js\").TileCoord} [opt_tileCoord] Temporary import(\"../tilecoord.js\").TileCoord object.\n   * @return {import(\"../tilecoord.js\").TileCoord} Tile coordinate.\n   * @private\n   */\n  getTileCoordForXYAndResolution_(\n    x,\n    y,\n    resolution,\n    reverseIntersectionPolicy,\n    opt_tileCoord\n  ) {\n    const z = this.getZForResolution(resolution);\n    const scale = resolution / this.getResolution(z);\n    const origin = this.getOrigin(z);\n    const tileSize = toSize(this.getTileSize(z), this.tmpSize_);\n\n    let tileCoordX = (scale * (x - origin[0])) / resolution / tileSize[0];\n    let tileCoordY = (scale * (origin[1] - y)) / resolution / tileSize[1];\n\n    if (reverseIntersectionPolicy) {\n      tileCoordX = ceil(tileCoordX, DECIMALS) - 1;\n      tileCoordY = ceil(tileCoordY, DECIMALS) - 1;\n    } else {\n      tileCoordX = floor(tileCoordX, DECIMALS);\n      tileCoordY = floor(tileCoordY, DECIMALS);\n    }\n\n    return createOrUpdateTileCoord(z, tileCoordX, tileCoordY, opt_tileCoord);\n  }\n\n  /**\n   * Although there is repetition between this method and `getTileCoordForXYAndResolution_`,\n   * they should have separate implementations.  This method is for integer zoom\n   * levels.  The other method should only be called for resolutions corresponding\n   * to non-integer zoom levels.\n   * @param {number} x Map x coordinate.\n   * @param {number} y Map y coordinate.\n   * @param {number} z Integer zoom level.\n   * @param {boolean} reverseIntersectionPolicy Instead of letting edge\n   *     intersections go to the higher tile coordinate, let edge intersections\n   *     go to the lower tile coordinate.\n   * @param {import(\"../tilecoord.js\").TileCoord} [opt_tileCoord] Temporary import(\"../tilecoord.js\").TileCoord object.\n   * @return {import(\"../tilecoord.js\").TileCoord} Tile coordinate.\n   * @private\n   */\n  getTileCoordForXYAndZ_(x, y, z, reverseIntersectionPolicy, opt_tileCoord) {\n    const origin = this.getOrigin(z);\n    const resolution = this.getResolution(z);\n    const tileSize = toSize(this.getTileSize(z), this.tmpSize_);\n\n    let tileCoordX = (x - origin[0]) / resolution / tileSize[0];\n    let tileCoordY = (origin[1] - y) / resolution / tileSize[1];\n\n    if (reverseIntersectionPolicy) {\n      tileCoordX = ceil(tileCoordX, DECIMALS) - 1;\n      tileCoordY = ceil(tileCoordY, DECIMALS) - 1;\n    } else {\n      tileCoordX = floor(tileCoordX, DECIMALS);\n      tileCoordY = floor(tileCoordY, DECIMALS);\n    }\n\n    return createOrUpdateTileCoord(z, tileCoordX, tileCoordY, opt_tileCoord);\n  }\n\n  /**\n   * Get a tile coordinate given a map coordinate and zoom level.\n   * @param {import(\"../coordinate.js\").Coordinate} coordinate Coordinate.\n   * @param {number} z Zoom level.\n   * @param {import(\"../tilecoord.js\").TileCoord} [opt_tileCoord] Destination import(\"../tilecoord.js\").TileCoord object.\n   * @return {import(\"../tilecoord.js\").TileCoord} Tile coordinate.\n   * @api\n   */\n  getTileCoordForCoordAndZ(coordinate, z, opt_tileCoord) {\n    return this.getTileCoordForXYAndZ_(\n      coordinate[0],\n      coordinate[1],\n      z,\n      false,\n      opt_tileCoord\n    );\n  }\n\n  /**\n   * @param {import(\"../tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n   * @return {number} Tile resolution.\n   */\n  getTileCoordResolution(tileCoord) {\n    return this.resolutions_[tileCoord[0]];\n  }\n\n  /**\n   * Get the tile size for a zoom level. The type of the return value matches the\n   * `tileSize` or `tileSizes` that the tile grid was configured with. To always\n   * get an {@link import(\"../size.js\").Size}, run the result through {@link module:ol/size.toSize}.\n   * @param {number} z Z.\n   * @return {number|import(\"../size.js\").Size} Tile size.\n   * @api\n   */\n  getTileSize(z) {\n    if (this.tileSize_) {\n      return this.tileSize_;\n    }\n    return this.tileSizes_[z];\n  }\n\n  /**\n   * @param {number} z Zoom level.\n   * @return {import(\"../TileRange.js\").default} Extent tile range for the specified zoom level.\n   */\n  getFullTileRange(z) {\n    if (!this.fullTileRanges_) {\n      return this.extent_\n        ? this.getTileRangeForExtentAndZ(this.extent_, z)\n        : null;\n    }\n    return this.fullTileRanges_[z];\n  }\n\n  /**\n   * @param {number} resolution Resolution.\n   * @param {number|import(\"../array.js\").NearestDirectionFunction} [opt_direction]\n   *     If 0, the nearest resolution will be used.\n   *     If 1, the nearest higher resolution (lower Z) will be used. If -1, the\n   *     nearest lower resolution (higher Z) will be used. Default is 0.\n   *     Use a {@link module:ol/array~NearestDirectionFunction} for more precise control.\n   *\n   * For example to change tile Z at the midpoint of zoom levels\n   * ```js\n   * function(value, high, low) {\n   *   return value - low * Math.sqrt(high / low);\n   * }\n   * ```\n   * @return {number} Z.\n   * @api\n   */\n  getZForResolution(resolution, opt_direction) {\n    const z = linearFindNearest(\n      this.resolutions_,\n      resolution,\n      opt_direction || 0\n    );\n    return clamp(z, this.minZoom, this.maxZoom);\n  }\n\n  /**\n   * The tile with the provided tile coordinate intersects the given viewport.\n   * @param {import('../tilecoord.js').TileCoord} tileCoord Tile coordinate.\n   * @param {Array<number>} viewport Viewport as returned from {@link module:ol/extent.getRotatedViewport}.\n   * @return {boolean} The tile with the provided tile coordinate intersects the given viewport.\n   */\n  tileCoordIntersectsViewport(tileCoord, viewport) {\n    return intersectsLinearRing(\n      viewport,\n      0,\n      viewport.length,\n      2,\n      this.getTileCoordExtent(tileCoord)\n    );\n  }\n\n  /**\n   * @param {!import(\"../extent.js\").Extent} extent Extent for this tile grid.\n   * @private\n   */\n  calculateTileRanges_(extent) {\n    const length = this.resolutions_.length;\n    const fullTileRanges = new Array(length);\n    for (let z = this.minZoom; z < length; ++z) {\n      fullTileRanges[z] = this.getTileRangeForExtentAndZ(extent, z);\n    }\n    this.fullTileRanges_ = fullTileRanges;\n  }\n}\n\nexport default TileGrid;\n","/**\n * @module ol/tilegrid\n */\nimport TileGrid from './tilegrid/TileGrid.js';\nimport {DEFAULT_MAX_ZOOM, DEFAULT_TILE_SIZE} from './tilegrid/common.js';\nimport {METERS_PER_UNIT, get as getProjection} from './proj.js';\nimport {\n  containsCoordinate,\n  createOrUpdate,\n  getCorner,\n  getHeight,\n  getWidth,\n} from './extent.js';\nimport {toSize} from './size.js';\n\n/**\n * @param {import(\"./proj/Projection.js\").default} projection Projection.\n * @return {!TileGrid} Default tile grid for the\n * passed projection.\n */\nexport function getForProjection(projection) {\n  let tileGrid = projection.getDefaultTileGrid();\n  if (!tileGrid) {\n    tileGrid = createForProjection(projection);\n    projection.setDefaultTileGrid(tileGrid);\n  }\n  return tileGrid;\n}\n\n/**\n * @param {TileGrid} tileGrid Tile grid.\n * @param {import(\"./tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n * @param {import(\"./proj/Projection.js\").default} projection Projection.\n * @return {import(\"./tilecoord.js\").TileCoord} Tile coordinate.\n */\nexport function wrapX(tileGrid, tileCoord, projection) {\n  const z = tileCoord[0];\n  const center = tileGrid.getTileCoordCenter(tileCoord);\n  const projectionExtent = extentFromProjection(projection);\n  if (!containsCoordinate(projectionExtent, center)) {\n    const worldWidth = getWidth(projectionExtent);\n    const worldsAway = Math.ceil(\n      (projectionExtent[0] - center[0]) / worldWidth\n    );\n    center[0] += worldWidth * worldsAway;\n    return tileGrid.getTileCoordForCoordAndZ(center, z);\n  }\n  return tileCoord;\n}\n\n/**\n * @param {import(\"./extent.js\").Extent} extent Extent.\n * @param {number} [maxZoom] Maximum zoom level (default is\n *     DEFAULT_MAX_ZOOM).\n * @param {number|import(\"./size.js\").Size} [tileSize] Tile size (default uses\n *     DEFAULT_TILE_SIZE).\n * @param {import(\"./extent.js\").Corner} [corner] Extent corner (default is `'top-left'`).\n * @return {!TileGrid} TileGrid instance.\n */\nexport function createForExtent(extent, maxZoom, tileSize, corner) {\n  corner = corner !== undefined ? corner : 'top-left';\n\n  const resolutions = resolutionsFromExtent(extent, maxZoom, tileSize);\n\n  return new TileGrid({\n    extent: extent,\n    origin: getCorner(extent, corner),\n    resolutions: resolutions,\n    tileSize: tileSize,\n  });\n}\n\n/**\n * @typedef {Object} XYZOptions\n * @property {import(\"./extent.js\").Extent} [extent] Extent for the tile grid. The origin for an XYZ tile grid is the\n * top-left corner of the extent. If `maxResolution` is not provided the zero level of the grid is defined by the resolution\n * at which one tile fits in the provided extent. If not provided, the extent of the EPSG:3857 projection is used.\n * @property {number} [maxResolution] Resolution at level zero.\n * @property {number} [maxZoom] Maximum zoom. The default is `42`. This determines the number of levels\n * in the grid set. For example, a `maxZoom` of 21 means there are 22 levels in the grid set.\n * @property {number} [minZoom=0] Minimum zoom.\n * @property {number|import(\"./size.js\").Size} [tileSize=[256, 256]] Tile size in pixels.\n */\n\n/**\n * Creates a tile grid with a standard XYZ tiling scheme.\n * @param {XYZOptions} [options] Tile grid options.\n * @return {!TileGrid} Tile grid instance.\n * @api\n */\nexport function createXYZ(options) {\n  const xyzOptions = options || {};\n\n  const extent = xyzOptions.extent || getProjection('EPSG:3857').getExtent();\n\n  const gridOptions = {\n    extent: extent,\n    minZoom: xyzOptions.minZoom,\n    tileSize: xyzOptions.tileSize,\n    resolutions: resolutionsFromExtent(\n      extent,\n      xyzOptions.maxZoom,\n      xyzOptions.tileSize,\n      xyzOptions.maxResolution\n    ),\n  };\n  return new TileGrid(gridOptions);\n}\n\n/**\n * Create a resolutions array from an extent.  A zoom factor of 2 is assumed.\n * @param {import(\"./extent.js\").Extent} extent Extent.\n * @param {number} [maxZoom] Maximum zoom level (default is\n *     DEFAULT_MAX_ZOOM).\n * @param {number|import(\"./size.js\").Size} [tileSize] Tile size (default uses\n *     DEFAULT_TILE_SIZE).\n * @param {number} [maxResolution] Resolution at level zero.\n * @return {!Array<number>} Resolutions array.\n */\nfunction resolutionsFromExtent(extent, maxZoom, tileSize, maxResolution) {\n  maxZoom = maxZoom !== undefined ? maxZoom : DEFAULT_MAX_ZOOM;\n  tileSize = toSize(tileSize !== undefined ? tileSize : DEFAULT_TILE_SIZE);\n\n  const height = getHeight(extent);\n  const width = getWidth(extent);\n\n  maxResolution =\n    maxResolution > 0\n      ? maxResolution\n      : Math.max(width / tileSize[0], height / tileSize[1]);\n\n  const length = maxZoom + 1;\n  const resolutions = new Array(length);\n  for (let z = 0; z < length; ++z) {\n    resolutions[z] = maxResolution / Math.pow(2, z);\n  }\n  return resolutions;\n}\n\n/**\n * @param {import(\"./proj.js\").ProjectionLike} projection Projection.\n * @param {number} [maxZoom] Maximum zoom level (default is\n *     DEFAULT_MAX_ZOOM).\n * @param {number|import(\"./size.js\").Size} [tileSize] Tile size (default uses\n *     DEFAULT_TILE_SIZE).\n * @param {import(\"./extent.js\").Corner} [corner] Extent corner (default is `'top-left'`).\n * @return {!TileGrid} TileGrid instance.\n */\nexport function createForProjection(projection, maxZoom, tileSize, corner) {\n  const extent = extentFromProjection(projection);\n  return createForExtent(extent, maxZoom, tileSize, corner);\n}\n\n/**\n * Generate a tile grid extent from a projection.  If the projection has an\n * extent, it is used.  If not, a global extent is assumed.\n * @param {import(\"./proj.js\").ProjectionLike} projection Projection.\n * @return {import(\"./extent.js\").Extent} Extent.\n */\nexport function extentFromProjection(projection) {\n  projection = getProjection(projection);\n  let extent = projection.getExtent();\n  if (!extent) {\n    const half =\n      (180 * METERS_PER_UNIT.degrees) / projection.getMetersPerUnit();\n    extent = createOrUpdate(-half, -half, half, half);\n  }\n  return extent;\n}\n","/**\n * @module ol/source/Tile\n */\nimport Event from '../events/Event.js';\nimport Source from './Source.js';\nimport TileCache from '../TileCache.js';\nimport TileState from '../TileState.js';\nimport {abstract} from '../util.js';\nimport {assert} from '../asserts.js';\nimport {equivalent} from '../proj.js';\nimport {getKeyZXY, withinExtentAndZ} from '../tilecoord.js';\nimport {\n  getForProjection as getTileGridForProjection,\n  wrapX,\n} from '../tilegrid.js';\nimport {scale as scaleSize, toSize} from '../size.js';\n\n/***\n * @template Return\n * @typedef {import(\"../Observable\").OnSignature<import(\"../Observable\").EventTypes, import(\"../events/Event.js\").default, Return> &\n *   import(\"../Observable\").OnSignature<import(\"../ObjectEventType\").Types, import(\"../Object\").ObjectEvent, Return> &\n *   import(\"../Observable\").OnSignature<import(\"./TileEventType\").TileSourceEventTypes, TileSourceEvent, Return> &\n *   import(\"../Observable\").CombinedOnSignature<import(\"../Observable\").EventTypes|import(\"../ObjectEventType\").Types|\n *     import(\"./TileEventType\").TileSourceEventTypes, Return>} TileSourceOnSignature\n */\n\n/**\n * @typedef {Object} Options\n * @property {import(\"./Source.js\").AttributionLike} [attributions] Attributions.\n * @property {boolean} [attributionsCollapsible=true] Attributions are collapsible.\n * @property {number} [cacheSize] CacheSize.\n * @property {boolean} [opaque=false] Whether the layer is opaque.\n * @property {number} [tilePixelRatio] TilePixelRatio.\n * @property {import(\"../proj.js\").ProjectionLike} [projection] Projection.\n * @property {import(\"./Source.js\").State} [state] State.\n * @property {import(\"../tilegrid/TileGrid.js\").default} [tileGrid] TileGrid.\n * @property {boolean} [wrapX=false] WrapX.\n * @property {number} [transition] Transition.\n * @property {string} [key] Key.\n * @property {number|import(\"../array.js\").NearestDirectionFunction} [zDirection=0] ZDirection.\n * @property {boolean} [interpolate=false] Use interpolated values when resampling.  By default,\n * the nearest neighbor is used when resampling.\n */\n\n/**\n * @classdesc\n * Abstract base class; normally only used for creating subclasses and not\n * instantiated in apps.\n * Base class for sources providing images divided into a tile grid.\n * @abstract\n * @api\n */\nclass TileSource extends Source {\n  /**\n   * @param {Options} options SourceTile source options.\n   */\n  constructor(options) {\n    super({\n      attributions: options.attributions,\n      attributionsCollapsible: options.attributionsCollapsible,\n      projection: options.projection,\n      state: options.state,\n      wrapX: options.wrapX,\n      interpolate: options.interpolate,\n    });\n\n    /***\n     * @type {TileSourceOnSignature<import(\"../events\").EventsKey>}\n     */\n    this.on;\n\n    /***\n     * @type {TileSourceOnSignature<import(\"../events\").EventsKey>}\n     */\n    this.once;\n\n    /***\n     * @type {TileSourceOnSignature<void>}\n     */\n    this.un;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.opaque_ = options.opaque !== undefined ? options.opaque : false;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.tilePixelRatio_ =\n      options.tilePixelRatio !== undefined ? options.tilePixelRatio : 1;\n\n    /**\n     * @type {import(\"../tilegrid/TileGrid.js\").default|null}\n     */\n    this.tileGrid = options.tileGrid !== undefined ? options.tileGrid : null;\n\n    const tileSize = [256, 256];\n    if (this.tileGrid) {\n      toSize(this.tileGrid.getTileSize(this.tileGrid.getMinZoom()), tileSize);\n    }\n\n    /**\n     * @protected\n     * @type {import(\"../TileCache.js\").default}\n     */\n    this.tileCache = new TileCache(options.cacheSize || 0);\n\n    /**\n     * @protected\n     * @type {import(\"../size.js\").Size}\n     */\n    this.tmpSize = [0, 0];\n\n    /**\n     * @private\n     * @type {string}\n     */\n    this.key_ = options.key || '';\n\n    /**\n     * @protected\n     * @type {import(\"../Tile.js\").Options}\n     */\n    this.tileOptions = {\n      transition: options.transition,\n      interpolate: options.interpolate,\n    };\n\n    /**\n     * zDirection hint, read by the renderer. Indicates which resolution should be used\n     * by a renderer if the views resolution does not match any resolution of the tile source.\n     * If 0, the nearest resolution will be used. If 1, the nearest lower resolution\n     * will be used. If -1, the nearest higher resolution will be used.\n     * @type {number|import(\"../array.js\").NearestDirectionFunction}\n     */\n    this.zDirection = options.zDirection ? options.zDirection : 0;\n  }\n\n  /**\n   * @return {boolean} Can expire cache.\n   */\n  canExpireCache() {\n    return this.tileCache.canExpireCache();\n  }\n\n  /**\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   * @param {!Object<string, boolean>} usedTiles Used tiles.\n   */\n  expireCache(projection, usedTiles) {\n    const tileCache = this.getTileCacheForProjection(projection);\n    if (tileCache) {\n      tileCache.expireCache(usedTiles);\n    }\n  }\n\n  /**\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   * @param {number} z Zoom level.\n   * @param {import(\"../TileRange.js\").default} tileRange Tile range.\n   * @param {function(import(\"../Tile.js\").default):(boolean|void)} callback Called with each\n   *     loaded tile.  If the callback returns `false`, the tile will not be\n   *     considered loaded.\n   * @return {boolean} The tile range is fully covered with loaded tiles.\n   */\n  forEachLoadedTile(projection, z, tileRange, callback) {\n    const tileCache = this.getTileCacheForProjection(projection);\n    if (!tileCache) {\n      return false;\n    }\n\n    let covered = true;\n    let tile, tileCoordKey, loaded;\n    for (let x = tileRange.minX; x <= tileRange.maxX; ++x) {\n      for (let y = tileRange.minY; y <= tileRange.maxY; ++y) {\n        tileCoordKey = getKeyZXY(z, x, y);\n        loaded = false;\n        if (tileCache.containsKey(tileCoordKey)) {\n          tile = /** @type {!import(\"../Tile.js\").default} */ (\n            tileCache.get(tileCoordKey)\n          );\n          loaded = tile.getState() === TileState.LOADED;\n          if (loaded) {\n            loaded = callback(tile) !== false;\n          }\n        }\n        if (!loaded) {\n          covered = false;\n        }\n      }\n    }\n    return covered;\n  }\n\n  /**\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   * @return {number} Gutter.\n   */\n  getGutterForProjection(projection) {\n    return 0;\n  }\n\n  /**\n   * Return the key to be used for all tiles in the source.\n   * @return {string} The key for all tiles.\n   */\n  getKey() {\n    return this.key_;\n  }\n\n  /**\n   * Set the value to be used as the key for all tiles in the source.\n   * @param {string} key The key for tiles.\n   * @protected\n   */\n  setKey(key) {\n    if (this.key_ !== key) {\n      this.key_ = key;\n      this.changed();\n    }\n  }\n\n  /**\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   * @return {boolean} Opaque.\n   */\n  getOpaque(projection) {\n    return this.opaque_;\n  }\n\n  /**\n   * @param {import(\"../proj/Projection\").default} [projection] Projection.\n   * @return {Array<number>|null} Resolutions.\n   */\n  getResolutions(projection) {\n    const tileGrid = projection\n      ? this.getTileGridForProjection(projection)\n      : this.tileGrid;\n    if (!tileGrid) {\n      return null;\n    }\n    return tileGrid.getResolutions();\n  }\n\n  /**\n   * @abstract\n   * @param {number} z Tile coordinate z.\n   * @param {number} x Tile coordinate x.\n   * @param {number} y Tile coordinate y.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   * @return {!import(\"../Tile.js\").default} Tile.\n   */\n  getTile(z, x, y, pixelRatio, projection) {\n    return abstract();\n  }\n\n  /**\n   * Return the tile grid of the tile source.\n   * @return {import(\"../tilegrid/TileGrid.js\").default|null} Tile grid.\n   * @api\n   */\n  getTileGrid() {\n    return this.tileGrid;\n  }\n\n  /**\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   * @return {!import(\"../tilegrid/TileGrid.js\").default} Tile grid.\n   */\n  getTileGridForProjection(projection) {\n    if (!this.tileGrid) {\n      return getTileGridForProjection(projection);\n    }\n    return this.tileGrid;\n  }\n\n  /**\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   * @return {import(\"../TileCache.js\").default} Tile cache.\n   * @protected\n   */\n  getTileCacheForProjection(projection) {\n    const sourceProjection = this.getProjection();\n    assert(\n      sourceProjection === null || equivalent(sourceProjection, projection),\n      68 // A VectorTile source can only be rendered if it has a projection compatible with the view projection.\n    );\n    return this.tileCache;\n  }\n\n  /**\n   * Get the tile pixel ratio for this source. Subclasses may override this\n   * method, which is meant to return a supported pixel ratio that matches the\n   * provided `pixelRatio` as close as possible.\n   * @param {number} pixelRatio Pixel ratio.\n   * @return {number} Tile pixel ratio.\n   */\n  getTilePixelRatio(pixelRatio) {\n    return this.tilePixelRatio_;\n  }\n\n  /**\n   * @param {number} z Z.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   * @return {import(\"../size.js\").Size} Tile size.\n   */\n  getTilePixelSize(z, pixelRatio, projection) {\n    const tileGrid = this.getTileGridForProjection(projection);\n    const tilePixelRatio = this.getTilePixelRatio(pixelRatio);\n    const tileSize = toSize(tileGrid.getTileSize(z), this.tmpSize);\n    if (tilePixelRatio == 1) {\n      return tileSize;\n    }\n    return scaleSize(tileSize, tilePixelRatio, this.tmpSize);\n  }\n\n  /**\n   * Returns a tile coordinate wrapped around the x-axis. When the tile coordinate\n   * is outside the resolution and extent range of the tile grid, `null` will be\n   * returned.\n   * @param {import(\"../tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n   * @param {import(\"../proj/Projection.js\").default} [projection] Projection.\n   * @return {import(\"../tilecoord.js\").TileCoord} Tile coordinate to be passed to the tileUrlFunction or\n   *     null if no tile URL should be created for the passed `tileCoord`.\n   */\n  getTileCoordForTileUrlFunction(tileCoord, projection) {\n    projection = projection !== undefined ? projection : this.getProjection();\n    const tileGrid = this.getTileGridForProjection(projection);\n    if (this.getWrapX() && projection.isGlobal()) {\n      tileCoord = wrapX(tileGrid, tileCoord, projection);\n    }\n    return withinExtentAndZ(tileCoord, tileGrid) ? tileCoord : null;\n  }\n\n  /**\n   * Remove all cached tiles from the source. The next render cycle will fetch new tiles.\n   * @api\n   */\n  clear() {\n    this.tileCache.clear();\n  }\n\n  refresh() {\n    this.clear();\n    super.refresh();\n  }\n\n  /**\n   * Increases the cache size if needed\n   * @param {number} tileCount Minimum number of tiles needed.\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   */\n  updateCacheSize(tileCount, projection) {\n    const tileCache = this.getTileCacheForProjection(projection);\n    if (tileCount > tileCache.highWaterMark) {\n      tileCache.highWaterMark = tileCount;\n    }\n  }\n\n  /**\n   * Marks a tile coord as being used, without triggering a load.\n   * @abstract\n   * @param {number} z Tile coordinate z.\n   * @param {number} x Tile coordinate x.\n   * @param {number} y Tile coordinate y.\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   */\n  useTile(z, x, y, projection) {}\n}\n\n/**\n * @classdesc\n * Events emitted by {@link module:ol/source/Tile~TileSource} instances are instances of this\n * type.\n */\nexport class TileSourceEvent extends Event {\n  /**\n   * @param {string} type Type.\n   * @param {import(\"../Tile.js\").default} tile The tile.\n   */\n  constructor(type, tile) {\n    super(type);\n\n    /**\n     * The tile related to the event.\n     * @type {import(\"../Tile.js\").default}\n     * @api\n     */\n    this.tile = tile;\n  }\n}\n\nexport default TileSource;\n","/**\n * @module ol/tileurlfunction\n */\nimport {assert} from './asserts.js';\nimport {modulo} from './math.js';\nimport {hash as tileCoordHash} from './tilecoord.js';\n\n/**\n * @param {string} template Template.\n * @param {import(\"./tilegrid/TileGrid.js\").default} tileGrid Tile grid.\n * @return {import(\"./Tile.js\").UrlFunction} Tile URL function.\n */\nexport function createFromTemplate(template, tileGrid) {\n  const zRegEx = /\\{z\\}/g;\n  const xRegEx = /\\{x\\}/g;\n  const yRegEx = /\\{y\\}/g;\n  const dashYRegEx = /\\{-y\\}/g;\n  return (\n    /**\n     * @param {import(\"./tilecoord.js\").TileCoord} tileCoord Tile Coordinate.\n     * @param {number} pixelRatio Pixel ratio.\n     * @param {import(\"./proj/Projection.js\").default} projection Projection.\n     * @return {string|undefined} Tile URL.\n     */\n    function (tileCoord, pixelRatio, projection) {\n      if (!tileCoord) {\n        return undefined;\n      }\n      return template\n        .replace(zRegEx, tileCoord[0].toString())\n        .replace(xRegEx, tileCoord[1].toString())\n        .replace(yRegEx, tileCoord[2].toString())\n        .replace(dashYRegEx, function () {\n          const z = tileCoord[0];\n          const range = tileGrid.getFullTileRange(z);\n          assert(range, 55); // The {-y} placeholder requires a tile grid with extent\n          const y = range.getHeight() - tileCoord[2] - 1;\n          return y.toString();\n        });\n    }\n  );\n}\n\n/**\n * @param {Array<string>} templates Templates.\n * @param {import(\"./tilegrid/TileGrid.js\").default} tileGrid Tile grid.\n * @return {import(\"./Tile.js\").UrlFunction} Tile URL function.\n */\nexport function createFromTemplates(templates, tileGrid) {\n  const len = templates.length;\n  const tileUrlFunctions = new Array(len);\n  for (let i = 0; i < len; ++i) {\n    tileUrlFunctions[i] = createFromTemplate(templates[i], tileGrid);\n  }\n  return createFromTileUrlFunctions(tileUrlFunctions);\n}\n\n/**\n * @param {Array<import(\"./Tile.js\").UrlFunction>} tileUrlFunctions Tile URL Functions.\n * @return {import(\"./Tile.js\").UrlFunction} Tile URL function.\n */\nexport function createFromTileUrlFunctions(tileUrlFunctions) {\n  if (tileUrlFunctions.length === 1) {\n    return tileUrlFunctions[0];\n  }\n  return (\n    /**\n     * @param {import(\"./tilecoord.js\").TileCoord} tileCoord Tile Coordinate.\n     * @param {number} pixelRatio Pixel ratio.\n     * @param {import(\"./proj/Projection.js\").default} projection Projection.\n     * @return {string|undefined} Tile URL.\n     */\n    function (tileCoord, pixelRatio, projection) {\n      if (!tileCoord) {\n        return undefined;\n      }\n      const h = tileCoordHash(tileCoord);\n      const index = modulo(h, tileUrlFunctions.length);\n      return tileUrlFunctions[index](tileCoord, pixelRatio, projection);\n    }\n  );\n}\n\n/**\n * @param {import(\"./tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n * @param {number} pixelRatio Pixel ratio.\n * @param {import(\"./proj/Projection.js\").default} projection Projection.\n * @return {string|undefined} Tile URL.\n */\nexport function nullTileUrlFunction(tileCoord, pixelRatio, projection) {\n  return undefined;\n}\n\n/**\n * @param {string} url URL.\n * @return {Array<string>} Array of urls.\n */\nexport function expandUrl(url) {\n  const urls = [];\n  let match = /\\{([a-z])-([a-z])\\}/.exec(url);\n  if (match) {\n    // char range\n    const startCharCode = match[1].charCodeAt(0);\n    const stopCharCode = match[2].charCodeAt(0);\n    let charCode;\n    for (charCode = startCharCode; charCode <= stopCharCode; ++charCode) {\n      urls.push(url.replace(match[0], String.fromCharCode(charCode)));\n    }\n    return urls;\n  }\n  match = /\\{(\\d+)-(\\d+)\\}/.exec(url);\n  if (match) {\n    // number range\n    const stop = parseInt(match[2], 10);\n    for (let i = parseInt(match[1], 10); i <= stop; i++) {\n      urls.push(url.replace(match[0], i.toString()));\n    }\n    return urls;\n  }\n  urls.push(url);\n  return urls;\n}\n","/**\n * @module ol/source/UrlTile\n */\nimport TileEventType from './TileEventType.js';\nimport TileSource, {TileSourceEvent} from './Tile.js';\nimport TileState from '../TileState.js';\nimport {createFromTemplates, expandUrl} from '../tileurlfunction.js';\nimport {getKeyZXY} from '../tilecoord.js';\nimport {getUid} from '../util.js';\n\n/**\n * @typedef {Object} Options\n * @property {import(\"./Source.js\").AttributionLike} [attributions] Attributions.\n * @property {boolean} [attributionsCollapsible=true] Attributions are collapsible.\n * @property {number} [cacheSize] Cache size.\n * @property {boolean} [opaque=false] Whether the layer is opaque.\n * @property {import(\"../proj.js\").ProjectionLike} [projection] Projection.\n * @property {import(\"./Source.js\").State} [state] State.\n * @property {import(\"../tilegrid/TileGrid.js\").default} [tileGrid] TileGrid.\n * @property {import(\"../Tile.js\").LoadFunction} tileLoadFunction TileLoadFunction.\n * @property {number} [tilePixelRatio] TilePixelRatio.\n * @property {import(\"../Tile.js\").UrlFunction} [tileUrlFunction] TileUrlFunction.\n * @property {string} [url] Url.\n * @property {Array<string>} [urls] Urls.\n * @property {boolean} [wrapX=true] WrapX.\n * @property {number} [transition] Transition.\n * @property {string} [key] Key.\n * @property {number|import(\"../array.js\").NearestDirectionFunction} [zDirection=0] ZDirection.\n * @property {boolean} [interpolate=false] Use interpolated values when resampling.  By default,\n * the nearest neighbor is used when resampling.\n */\n\n/**\n * @classdesc\n * Base class for sources providing tiles divided into a tile grid over http.\n *\n * @fires import(\"./Tile.js\").TileSourceEvent\n */\nclass UrlTile extends TileSource {\n  /**\n   * @param {Options} options Image tile options.\n   */\n  constructor(options) {\n    super({\n      attributions: options.attributions,\n      cacheSize: options.cacheSize,\n      opaque: options.opaque,\n      projection: options.projection,\n      state: options.state,\n      tileGrid: options.tileGrid,\n      tilePixelRatio: options.tilePixelRatio,\n      wrapX: options.wrapX,\n      transition: options.transition,\n      interpolate: options.interpolate,\n      key: options.key,\n      attributionsCollapsible: options.attributionsCollapsible,\n      zDirection: options.zDirection,\n    });\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.generateTileUrlFunction_ =\n      this.tileUrlFunction === UrlTile.prototype.tileUrlFunction;\n\n    /**\n     * @protected\n     * @type {import(\"../Tile.js\").LoadFunction}\n     */\n    this.tileLoadFunction = options.tileLoadFunction;\n\n    if (options.tileUrlFunction) {\n      this.tileUrlFunction = options.tileUrlFunction;\n    }\n\n    /**\n     * @protected\n     * @type {!Array<string>|null}\n     */\n    this.urls = null;\n\n    if (options.urls) {\n      this.setUrls(options.urls);\n    } else if (options.url) {\n      this.setUrl(options.url);\n    }\n\n    /**\n     * @private\n     * @type {!Object<string, boolean>}\n     */\n    this.tileLoadingKeys_ = {};\n  }\n\n  /**\n   * Return the tile load function of the source.\n   * @return {import(\"../Tile.js\").LoadFunction} TileLoadFunction\n   * @api\n   */\n  getTileLoadFunction() {\n    return this.tileLoadFunction;\n  }\n\n  /**\n   * Return the tile URL function of the source.\n   * @return {import(\"../Tile.js\").UrlFunction} TileUrlFunction\n   * @api\n   */\n  getTileUrlFunction() {\n    return Object.getPrototypeOf(this).tileUrlFunction === this.tileUrlFunction\n      ? this.tileUrlFunction.bind(this)\n      : this.tileUrlFunction;\n  }\n\n  /**\n   * Return the URLs used for this source.\n   * When a tileUrlFunction is used instead of url or urls,\n   * null will be returned.\n   * @return {!Array<string>|null} URLs.\n   * @api\n   */\n  getUrls() {\n    return this.urls;\n  }\n\n  /**\n   * Handle tile change events.\n   * @param {import(\"../events/Event.js\").default} event Event.\n   * @protected\n   */\n  handleTileChange(event) {\n    const tile = /** @type {import(\"../Tile.js\").default} */ (event.target);\n    const uid = getUid(tile);\n    const tileState = tile.getState();\n    let type;\n    if (tileState == TileState.LOADING) {\n      this.tileLoadingKeys_[uid] = true;\n      type = TileEventType.TILELOADSTART;\n    } else if (uid in this.tileLoadingKeys_) {\n      delete this.tileLoadingKeys_[uid];\n      type =\n        tileState == TileState.ERROR\n          ? TileEventType.TILELOADERROR\n          : tileState == TileState.LOADED\n          ? TileEventType.TILELOADEND\n          : undefined;\n    }\n    if (type != undefined) {\n      this.dispatchEvent(new TileSourceEvent(type, tile));\n    }\n  }\n\n  /**\n   * Set the tile load function of the source.\n   * @param {import(\"../Tile.js\").LoadFunction} tileLoadFunction Tile load function.\n   * @api\n   */\n  setTileLoadFunction(tileLoadFunction) {\n    this.tileCache.clear();\n    this.tileLoadFunction = tileLoadFunction;\n    this.changed();\n  }\n\n  /**\n   * Set the tile URL function of the source.\n   * @param {import(\"../Tile.js\").UrlFunction} tileUrlFunction Tile URL function.\n   * @param {string} [key] Optional new tile key for the source.\n   * @api\n   */\n  setTileUrlFunction(tileUrlFunction, key) {\n    this.tileUrlFunction = tileUrlFunction;\n    this.tileCache.pruneExceptNewestZ();\n    if (typeof key !== 'undefined') {\n      this.setKey(key);\n    } else {\n      this.changed();\n    }\n  }\n\n  /**\n   * Set the URL to use for requests.\n   * @param {string} url URL.\n   * @api\n   */\n  setUrl(url) {\n    const urls = expandUrl(url);\n    this.urls = urls;\n    this.setUrls(urls);\n  }\n\n  /**\n   * Set the URLs to use for requests.\n   * @param {Array<string>} urls URLs.\n   * @api\n   */\n  setUrls(urls) {\n    this.urls = urls;\n    const key = urls.join('\\n');\n    if (this.generateTileUrlFunction_) {\n      this.setTileUrlFunction(createFromTemplates(urls, this.tileGrid), key);\n    } else {\n      this.setKey(key);\n    }\n  }\n\n  /**\n   * @param {import(\"../tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   * @return {string|undefined} Tile URL.\n   */\n  tileUrlFunction(tileCoord, pixelRatio, projection) {\n    return undefined;\n  }\n\n  /**\n   * Marks a tile coord as being used, without triggering a load.\n   * @param {number} z Tile coordinate z.\n   * @param {number} x Tile coordinate x.\n   * @param {number} y Tile coordinate y.\n   */\n  useTile(z, x, y) {\n    const tileCoordKey = getKeyZXY(z, x, y);\n    if (this.tileCache.containsKey(tileCoordKey)) {\n      this.tileCache.get(tileCoordKey);\n    }\n  }\n}\n\nexport default UrlTile;\n","/**\n * @module ol/source/TileImage\n */\nimport EventType from '../events/EventType.js';\nimport ImageTile from '../ImageTile.js';\nimport ReprojTile from '../reproj/Tile.js';\nimport TileCache from '../TileCache.js';\nimport TileState from '../TileState.js';\nimport UrlTile from './UrlTile.js';\nimport {equivalent, get as getProjection} from '../proj.js';\nimport {getKey, getKeyZXY} from '../tilecoord.js';\nimport {getForProjection as getTileGridForProjection} from '../tilegrid.js';\nimport {getUid} from '../util.js';\n\n/**\n * @typedef {Object} Options\n * @property {import(\"./Source.js\").AttributionLike} [attributions] Attributions.\n * @property {boolean} [attributionsCollapsible=true] Attributions are collapsible.\n * @property {number} [cacheSize] Initial tile cache size. Will auto-grow to hold at least the number of tiles in the viewport.\n * @property {null|string} [crossOrigin] The `crossOrigin` attribute for loaded images.  Note that\n * you must provide a `crossOrigin` value if you want to access pixel data with the Canvas renderer.\n * See https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image for more detail.\n * @property {boolean} [interpolate=true] Use interpolated values when resampling.  By default,\n * linear interpolation is used when resampling.  Set to false to use the nearest neighbor instead.\n * @property {boolean} [opaque=false] Whether the layer is opaque.\n * @property {import(\"../proj.js\").ProjectionLike} [projection] Projection. Default is the view projection.\n * @property {number} [reprojectionErrorThreshold=0.5] Maximum allowed reprojection error (in pixels).\n * Higher values can increase reprojection performance, but decrease precision.\n * @property {import(\"./Source.js\").State} [state] Source state.\n * @property {typeof import(\"../ImageTile.js\").default} [tileClass] Class used to instantiate image tiles.\n * Default is {@link module:ol/ImageTile~ImageTile}.\n * @property {import(\"../tilegrid/TileGrid.js\").default} [tileGrid] Tile grid.\n * @property {import(\"../Tile.js\").LoadFunction} [tileLoadFunction] Optional function to load a tile given a URL. The default is\n * ```js\n * function(imageTile, src) {\n *   imageTile.getImage().src = src;\n * };\n * ```\n * @property {number} [tilePixelRatio=1] The pixel ratio used by the tile service. For example, if the tile\n * service advertizes 256px by 256px tiles but actually sends 512px\n * by 512px images (for retina/hidpi devices) then `tilePixelRatio`\n * should be set to `2`.\n * @property {import(\"../Tile.js\").UrlFunction} [tileUrlFunction] Optional function to get tile URL given a tile coordinate and the projection.\n * @property {string} [url] URL template. Must include `{x}`, `{y}` or `{-y}`, and `{z}` placeholders.\n * A `{?-?}` template pattern, for example `subdomain{a-f}.domain.com`, may be\n * used instead of defining each one separately in the `urls` option.\n * @property {Array<string>} [urls] An array of URL templates.\n * @property {boolean} [wrapX] Whether to wrap the world horizontally. The default, is to\n * request out-of-bounds tiles from the server. When set to `false`, only one\n * world will be rendered. When set to `true`, tiles will be requested for one\n * world only, but they will be wrapped horizontally to render multiple worlds.\n * @property {number} [transition] Duration of the opacity transition for rendering.\n * To disable the opacity transition, pass `transition: 0`.\n * @property {string} [key] Optional tile key for proper cache fetching\n * @property {number|import(\"../array.js\").NearestDirectionFunction} [zDirection=0]\n * Choose whether to use tiles with a higher or lower zoom level when between integer\n * zoom levels. See {@link module:ol/tilegrid/TileGrid~TileGrid#getZForResolution}.\n */\n\n/**\n * @classdesc\n * Base class for sources providing images divided into a tile grid.\n *\n * @fires import(\"./Tile.js\").TileSourceEvent\n * @api\n */\nclass TileImage extends UrlTile {\n  /**\n   * @param {!Options} options Image tile options.\n   */\n  constructor(options) {\n    super({\n      attributions: options.attributions,\n      cacheSize: options.cacheSize,\n      opaque: options.opaque,\n      projection: options.projection,\n      state: options.state,\n      tileGrid: options.tileGrid,\n      tileLoadFunction: options.tileLoadFunction\n        ? options.tileLoadFunction\n        : defaultTileLoadFunction,\n      tilePixelRatio: options.tilePixelRatio,\n      tileUrlFunction: options.tileUrlFunction,\n      url: options.url,\n      urls: options.urls,\n      wrapX: options.wrapX,\n      transition: options.transition,\n      interpolate:\n        options.interpolate !== undefined ? options.interpolate : true,\n      key: options.key,\n      attributionsCollapsible: options.attributionsCollapsible,\n      zDirection: options.zDirection,\n    });\n\n    /**\n     * @protected\n     * @type {?string}\n     */\n    this.crossOrigin =\n      options.crossOrigin !== undefined ? options.crossOrigin : null;\n\n    /**\n     * @protected\n     * @type {typeof ImageTile}\n     */\n    this.tileClass =\n      options.tileClass !== undefined ? options.tileClass : ImageTile;\n\n    /**\n     * @protected\n     * @type {!Object<string, TileCache>}\n     */\n    this.tileCacheForProjection = {};\n\n    /**\n     * @protected\n     * @type {!Object<string, import(\"../tilegrid/TileGrid.js\").default>}\n     */\n    this.tileGridForProjection = {};\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.reprojectionErrorThreshold_ = options.reprojectionErrorThreshold;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.renderReprojectionEdges_ = false;\n  }\n\n  /**\n   * @return {boolean} Can expire cache.\n   */\n  canExpireCache() {\n    if (this.tileCache.canExpireCache()) {\n      return true;\n    }\n    for (const key in this.tileCacheForProjection) {\n      if (this.tileCacheForProjection[key].canExpireCache()) {\n        return true;\n      }\n    }\n\n    return false;\n  }\n\n  /**\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   * @param {!Object<string, boolean>} usedTiles Used tiles.\n   */\n  expireCache(projection, usedTiles) {\n    const usedTileCache = this.getTileCacheForProjection(projection);\n\n    this.tileCache.expireCache(\n      this.tileCache == usedTileCache ? usedTiles : {}\n    );\n    for (const id in this.tileCacheForProjection) {\n      const tileCache = this.tileCacheForProjection[id];\n      tileCache.expireCache(tileCache == usedTileCache ? usedTiles : {});\n    }\n  }\n\n  /**\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   * @return {number} Gutter.\n   */\n  getGutterForProjection(projection) {\n    if (\n      this.getProjection() &&\n      projection &&\n      !equivalent(this.getProjection(), projection)\n    ) {\n      return 0;\n    }\n    return this.getGutter();\n  }\n\n  /**\n   * @return {number} Gutter.\n   */\n  getGutter() {\n    return 0;\n  }\n\n  /**\n   * Return the key to be used for all tiles in the source.\n   * @return {string} The key for all tiles.\n   */\n  getKey() {\n    let key = super.getKey();\n    if (!this.getInterpolate()) {\n      key += ':disable-interpolation';\n    }\n    return key;\n  }\n\n  /**\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   * @return {boolean} Opaque.\n   */\n  getOpaque(projection) {\n    if (\n      this.getProjection() &&\n      projection &&\n      !equivalent(this.getProjection(), projection)\n    ) {\n      return false;\n    }\n    return super.getOpaque(projection);\n  }\n\n  /**\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   * @return {!import(\"../tilegrid/TileGrid.js\").default} Tile grid.\n   */\n  getTileGridForProjection(projection) {\n    const thisProj = this.getProjection();\n    if (this.tileGrid && (!thisProj || equivalent(thisProj, projection))) {\n      return this.tileGrid;\n    }\n    const projKey = getUid(projection);\n    if (!(projKey in this.tileGridForProjection)) {\n      this.tileGridForProjection[projKey] =\n        getTileGridForProjection(projection);\n    }\n    return this.tileGridForProjection[projKey];\n  }\n\n  /**\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   * @return {import(\"../TileCache.js\").default} Tile cache.\n   */\n  getTileCacheForProjection(projection) {\n    const thisProj = this.getProjection();\n    if (!thisProj || equivalent(thisProj, projection)) {\n      return this.tileCache;\n    }\n    const projKey = getUid(projection);\n    if (!(projKey in this.tileCacheForProjection)) {\n      this.tileCacheForProjection[projKey] = new TileCache(\n        this.tileCache.highWaterMark\n      );\n    }\n    return this.tileCacheForProjection[projKey];\n  }\n\n  /**\n   * @param {number} z Tile coordinate z.\n   * @param {number} x Tile coordinate x.\n   * @param {number} y Tile coordinate y.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   * @param {string} key The key set on the tile.\n   * @return {!ImageTile} Tile.\n   * @private\n   */\n  createTile_(z, x, y, pixelRatio, projection, key) {\n    const tileCoord = [z, x, y];\n    const urlTileCoord = this.getTileCoordForTileUrlFunction(\n      tileCoord,\n      projection\n    );\n    const tileUrl = urlTileCoord\n      ? this.tileUrlFunction(urlTileCoord, pixelRatio, projection)\n      : undefined;\n    const tile = new this.tileClass(\n      tileCoord,\n      tileUrl !== undefined ? TileState.IDLE : TileState.EMPTY,\n      tileUrl !== undefined ? tileUrl : '',\n      this.crossOrigin,\n      this.tileLoadFunction,\n      this.tileOptions\n    );\n    tile.key = key;\n    tile.addEventListener(EventType.CHANGE, this.handleTileChange.bind(this));\n    return tile;\n  }\n\n  /**\n   * @param {number} z Tile coordinate z.\n   * @param {number} x Tile coordinate x.\n   * @param {number} y Tile coordinate y.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   * @return {!(ImageTile|ReprojTile)} Tile.\n   */\n  getTile(z, x, y, pixelRatio, projection) {\n    const sourceProjection = this.getProjection();\n    if (\n      !sourceProjection ||\n      !projection ||\n      equivalent(sourceProjection, projection)\n    ) {\n      return this.getTileInternal(\n        z,\n        x,\n        y,\n        pixelRatio,\n        sourceProjection || projection\n      );\n    }\n    const cache = this.getTileCacheForProjection(projection);\n    const tileCoord = [z, x, y];\n    let tile;\n    const tileCoordKey = getKey(tileCoord);\n    if (cache.containsKey(tileCoordKey)) {\n      tile = cache.get(tileCoordKey);\n    }\n    const key = this.getKey();\n    if (tile && tile.key == key) {\n      return tile;\n    }\n    const sourceTileGrid = this.getTileGridForProjection(sourceProjection);\n    const targetTileGrid = this.getTileGridForProjection(projection);\n    const wrappedTileCoord = this.getTileCoordForTileUrlFunction(\n      tileCoord,\n      projection\n    );\n    const newTile = new ReprojTile(\n      sourceProjection,\n      sourceTileGrid,\n      projection,\n      targetTileGrid,\n      tileCoord,\n      wrappedTileCoord,\n      this.getTilePixelRatio(pixelRatio),\n      this.getGutter(),\n      (z, x, y, pixelRatio) =>\n        this.getTileInternal(z, x, y, pixelRatio, sourceProjection),\n      this.reprojectionErrorThreshold_,\n      this.renderReprojectionEdges_,\n      this.getInterpolate()\n    );\n    newTile.key = key;\n\n    if (tile) {\n      newTile.interimTile = tile;\n      newTile.refreshInterimChain();\n      cache.replace(tileCoordKey, newTile);\n    } else {\n      cache.set(tileCoordKey, newTile);\n    }\n    return newTile;\n  }\n\n  /**\n   * @param {number} z Tile coordinate z.\n   * @param {number} x Tile coordinate x.\n   * @param {number} y Tile coordinate y.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {!import(\"../proj/Projection.js\").default} projection Projection.\n   * @return {!ImageTile} Tile.\n   * @protected\n   */\n  getTileInternal(z, x, y, pixelRatio, projection) {\n    let tile = null;\n    const tileCoordKey = getKeyZXY(z, x, y);\n    const key = this.getKey();\n    if (!this.tileCache.containsKey(tileCoordKey)) {\n      tile = this.createTile_(z, x, y, pixelRatio, projection, key);\n      this.tileCache.set(tileCoordKey, tile);\n    } else {\n      tile = this.tileCache.get(tileCoordKey);\n      if (tile.key != key) {\n        // The source's params changed. If the tile has an interim tile and if we\n        // can use it then we use it. Otherwise we create a new tile.  In both\n        // cases we attempt to assign an interim tile to the new tile.\n        const interimTile = tile;\n        tile = this.createTile_(z, x, y, pixelRatio, projection, key);\n\n        //make the new tile the head of the list,\n        if (interimTile.getState() == TileState.IDLE) {\n          //the old tile hasn't begun loading yet, and is now outdated, so we can simply discard it\n          tile.interimTile = interimTile.interimTile;\n        } else {\n          tile.interimTile = interimTile;\n        }\n        tile.refreshInterimChain();\n        this.tileCache.replace(tileCoordKey, tile);\n      }\n    }\n    return tile;\n  }\n\n  /**\n   * Sets whether to render reprojection edges or not (usually for debugging).\n   * @param {boolean} render Render the edges.\n   * @api\n   */\n  setRenderReprojectionEdges(render) {\n    if (this.renderReprojectionEdges_ == render) {\n      return;\n    }\n    this.renderReprojectionEdges_ = render;\n    for (const id in this.tileCacheForProjection) {\n      this.tileCacheForProjection[id].clear();\n    }\n    this.changed();\n  }\n\n  /**\n   * Sets the tile grid to use when reprojecting the tiles to the given\n   * projection instead of the default tile grid for the projection.\n   *\n   * This can be useful when the default tile grid cannot be created\n   * (e.g. projection has no extent defined) or\n   * for optimization reasons (custom tile size, resolutions, ...).\n   *\n   * @param {import(\"../proj.js\").ProjectionLike} projection Projection.\n   * @param {import(\"../tilegrid/TileGrid.js\").default} tilegrid Tile grid to use for the projection.\n   * @api\n   */\n  setTileGridForProjection(projection, tilegrid) {\n    const proj = getProjection(projection);\n    if (proj) {\n      const projKey = getUid(proj);\n      if (!(projKey in this.tileGridForProjection)) {\n        this.tileGridForProjection[projKey] = tilegrid;\n      }\n    }\n  }\n\n  clear() {\n    super.clear();\n    for (const id in this.tileCacheForProjection) {\n      this.tileCacheForProjection[id].clear();\n    }\n  }\n}\n\n/**\n * @param {ImageTile} imageTile Image tile.\n * @param {string} src Source.\n */\nfunction defaultTileLoadFunction(imageTile, src) {\n  /** @type {HTMLImageElement|HTMLVideoElement} */ (imageTile.getImage()).src =\n    src;\n}\n\nexport default TileImage;\n","/**\n * @module ol/source/BingMaps\n */\n\nimport TileImage from './TileImage.js';\nimport {applyTransform, intersects} from '../extent.js';\nimport {createFromTileUrlFunctions} from '../tileurlfunction.js';\nimport {createOrUpdate} from '../tilecoord.js';\nimport {createXYZ, extentFromProjection} from '../tilegrid.js';\nimport {get as getProjection, getTransformFromProjections} from '../proj.js';\n\n/**\n * @param {import('../tilecoord.js').TileCoord} tileCoord Tile coord.\n * @return {string} Quad key.\n */\nexport function quadKey(tileCoord) {\n  const z = tileCoord[0];\n  const digits = new Array(z);\n  let mask = 1 << (z - 1);\n  let i, charCode;\n  for (i = 0; i < z; ++i) {\n    // 48 is charCode for 0 - '0'.charCodeAt(0)\n    charCode = 48;\n    if (tileCoord[1] & mask) {\n      charCode += 1;\n    }\n    if (tileCoord[2] & mask) {\n      charCode += 2;\n    }\n    digits[i] = String.fromCharCode(charCode);\n    mask >>= 1;\n  }\n  return digits.join('');\n}\n\n/**\n * The attribution containing a link to the Microsoft® Bing™ Maps Platform APIs’\n * Terms Of Use.\n * @const\n * @type {string}\n */\nconst TOS_ATTRIBUTION =\n  '<a class=\"ol-attribution-bing-tos\" ' +\n  'href=\"https://www.microsoft.com/maps/product/terms.html\" target=\"_blank\">' +\n  'Terms of Use</a>';\n\n/**\n * @typedef {Object} Options\n * @property {number} [cacheSize] Initial tile cache size. Will auto-grow to hold at least the number of tiles in the viewport.\n * @property {boolean} [hidpi=false] If `true` hidpi tiles will be requested.\n * @property {string} [culture='en-us'] Culture code.\n * @property {string} key Bing Maps API key. Get yours at https://www.bingmapsportal.com/.\n * @property {string} imagerySet Type of imagery.\n * @property {boolean} [interpolate=true] Use interpolated values when resampling.  By default,\n * linear interpolation is used when resampling.  Set to false to use the nearest neighbor instead.\n * @property {number} [maxZoom=21] Max zoom. Default is what's advertized by the BingMaps service.\n * @property {number} [reprojectionErrorThreshold=0.5] Maximum allowed reprojection error (in pixels).\n * Higher values can increase reprojection performance, but decrease precision.\n * @property {import(\"../Tile.js\").LoadFunction} [tileLoadFunction] Optional function to load a tile given a URL. The default is\n * ```js\n * function(imageTile, src) {\n *   imageTile.getImage().src = src;\n * };\n * ```\n * @property {boolean} [wrapX=true] Whether to wrap the world horizontally.\n * @property {number} [transition] Duration of the opacity transition for rendering.\n * To disable the opacity transition, pass `transition: 0`.\n * @property {number|import(\"../array.js\").NearestDirectionFunction} [zDirection=0]\n * Choose whether to use tiles with a higher or lower zoom level when between integer\n * zoom levels. See {@link module:ol/tilegrid/TileGrid~TileGrid#getZForResolution}.\n * @property {boolean} placeholderTiles Whether to show BingMaps placeholder tiles when zoomed past the maximum level provided in an area. When `false`, requests beyond\n * the maximum zoom level will return no tile. When `true`, the placeholder tile will be returned.\n */\n\n/**\n * @typedef {Object} BingMapsImageryMetadataResponse\n * @property {number} statusCode The response status code\n * @property {string} statusDescription The response status description\n * @property {string} authenticationResultCode The authentication result code\n * @property {Array<ResourceSet>} resourceSets The array of resource sets\n */\n\n/**\n * @typedef {Object} ResourceSet\n * @property {Array<Resource>} resources Resources.\n */\n\n/**\n * @typedef {Object} Resource\n * @property {number} imageHeight The image height\n * @property {number} imageWidth The image width\n * @property {number} zoomMin The minimum zoom level\n * @property {number} zoomMax The maximum zoom level\n * @property {string} imageUrl The image URL\n * @property {Array<string>} imageUrlSubdomains The image URL subdomains for rotation\n * @property {Array<ImageryProvider>} [imageryProviders] The array of ImageryProviders\n */\n\n/**\n * @typedef {Object} ImageryProvider\n * @property {Array<CoverageArea>} coverageAreas The coverage areas\n * @property {string} [attribution] The attribution\n */\n\n/**\n * @typedef {Object} CoverageArea\n * @property {number} zoomMin The minimum zoom\n * @property {number} zoomMax The maximum zoom\n * @property {Array<number>} bbox The coverage bounding box\n */\n\n/**\n * @classdesc\n * Layer source for Bing Maps tile data.\n * @api\n */\nclass BingMaps extends TileImage {\n  /**\n   * @param {Options} options Bing Maps options.\n   */\n  constructor(options) {\n    const hidpi = options.hidpi !== undefined ? options.hidpi : false;\n\n    super({\n      cacheSize: options.cacheSize,\n      crossOrigin: 'anonymous',\n      interpolate: options.interpolate,\n      opaque: true,\n      projection: getProjection('EPSG:3857'),\n      reprojectionErrorThreshold: options.reprojectionErrorThreshold,\n      state: 'loading',\n      tileLoadFunction: options.tileLoadFunction,\n      tilePixelRatio: hidpi ? 2 : 1,\n      wrapX: options.wrapX !== undefined ? options.wrapX : true,\n      transition: options.transition,\n      zDirection: options.zDirection,\n    });\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.hidpi_ = hidpi;\n\n    /**\n     * @private\n     * @type {string}\n     */\n    this.culture_ = options.culture !== undefined ? options.culture : 'en-us';\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.maxZoom_ = options.maxZoom !== undefined ? options.maxZoom : -1;\n\n    /**\n     * @private\n     * @type {string}\n     */\n    this.apiKey_ = options.key;\n\n    /**\n     * @private\n     * @type {string}\n     */\n    this.imagerySet_ = options.imagerySet;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.placeholderTiles_ = options.placeholderTiles;\n\n    const url =\n      'https://dev.virtualearth.net/REST/v1/Imagery/Metadata/' +\n      this.imagerySet_ +\n      '?uriScheme=https&include=ImageryProviders&key=' +\n      this.apiKey_ +\n      '&c=' +\n      this.culture_;\n\n    fetch(url)\n      .then((response) => response.json())\n      .then((json) => this.handleImageryMetadataResponse(json));\n  }\n\n  /**\n   * Get the api key used for this source.\n   *\n   * @return {string} The api key.\n   * @api\n   */\n  getApiKey() {\n    return this.apiKey_;\n  }\n\n  /**\n   * Get the imagery set associated with this source.\n   *\n   * @return {string} The imagery set.\n   * @api\n   */\n  getImagerySet() {\n    return this.imagerySet_;\n  }\n\n  /**\n   * @param {BingMapsImageryMetadataResponse} response Response.\n   */\n  handleImageryMetadataResponse(response) {\n    if (\n      response.statusCode != 200 ||\n      response.statusDescription != 'OK' ||\n      response.authenticationResultCode != 'ValidCredentials' ||\n      response.resourceSets.length != 1 ||\n      response.resourceSets[0].resources.length != 1\n    ) {\n      this.setState('error');\n      return;\n    }\n\n    const resource = response.resourceSets[0].resources[0];\n    const maxZoom = this.maxZoom_ == -1 ? resource.zoomMax : this.maxZoom_;\n\n    const sourceProjection = this.getProjection();\n    const extent = extentFromProjection(sourceProjection);\n    const scale = this.hidpi_ ? 2 : 1;\n    const tileSize =\n      resource.imageWidth == resource.imageHeight\n        ? resource.imageWidth / scale\n        : [resource.imageWidth / scale, resource.imageHeight / scale];\n\n    const tileGrid = createXYZ({\n      extent: extent,\n      minZoom: resource.zoomMin,\n      maxZoom: maxZoom,\n      tileSize: tileSize,\n    });\n    this.tileGrid = tileGrid;\n\n    const culture = this.culture_;\n    const hidpi = this.hidpi_;\n    const placeholderTiles = this.placeholderTiles_;\n    this.tileUrlFunction = createFromTileUrlFunctions(\n      resource.imageUrlSubdomains.map(function (subdomain) {\n        /** @type {import('../tilecoord.js').TileCoord} */\n        const quadKeyTileCoord = [0, 0, 0];\n        const imageUrl = resource.imageUrl\n          .replace('{subdomain}', subdomain)\n          .replace('{culture}', culture);\n        return (\n          /**\n           * @param {import(\"../tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n           * @param {number} pixelRatio Pixel ratio.\n           * @param {import(\"../proj/Projection.js\").default} projection Projection.\n           * @return {string|undefined} Tile URL.\n           */\n          function (tileCoord, pixelRatio, projection) {\n            if (!tileCoord) {\n              return undefined;\n            }\n            createOrUpdate(\n              tileCoord[0],\n              tileCoord[1],\n              tileCoord[2],\n              quadKeyTileCoord\n            );\n            const url = new URL(\n              imageUrl.replace('{quadkey}', quadKey(quadKeyTileCoord))\n            );\n            const params = url.searchParams;\n            if (hidpi) {\n              params.set('dpi', 'd1');\n              params.set('device', 'mobile');\n            }\n            if (placeholderTiles === true) {\n              params.delete('n');\n            } else if (placeholderTiles === false) {\n              params.set('n', 'z');\n            }\n            return url.toString();\n          }\n        );\n      })\n    );\n\n    if (resource.imageryProviders) {\n      const transform = getTransformFromProjections(\n        getProjection('EPSG:4326'),\n        this.getProjection()\n      );\n\n      this.setAttributions((frameState) => {\n        const attributions = [];\n        const viewState = frameState.viewState;\n        const tileGrid = this.getTileGrid();\n        const z = tileGrid.getZForResolution(\n          viewState.resolution,\n          this.zDirection\n        );\n        const tileCoord = tileGrid.getTileCoordForCoordAndZ(\n          viewState.center,\n          z\n        );\n        const zoom = tileCoord[0];\n        resource.imageryProviders.map(function (imageryProvider) {\n          let intersecting = false;\n          const coverageAreas = imageryProvider.coverageAreas;\n          for (let i = 0, ii = coverageAreas.length; i < ii; ++i) {\n            const coverageArea = coverageAreas[i];\n            if (zoom >= coverageArea.zoomMin && zoom <= coverageArea.zoomMax) {\n              const bbox = coverageArea.bbox;\n              const epsg4326Extent = [bbox[1], bbox[0], bbox[3], bbox[2]];\n              const extent = applyTransform(epsg4326Extent, transform);\n              if (intersects(extent, frameState.extent)) {\n                intersecting = true;\n                break;\n              }\n            }\n          }\n          if (intersecting) {\n            attributions.push(imageryProvider.attribution);\n          }\n        });\n\n        attributions.push(TOS_ATTRIBUTION);\n        return attributions;\n      });\n    }\n\n    this.setState('ready');\n  }\n}\n\nexport default BingMaps;\n","/**\n * @module ol/source/XYZ\n */\n\nimport TileImage from './TileImage.js';\nimport {createXYZ, extentFromProjection} from '../tilegrid.js';\n\n/**\n * @typedef {Object} Options\n * @property {import(\"./Source.js\").AttributionLike} [attributions] Attributions.\n * @property {boolean} [attributionsCollapsible=true] Attributions are collapsible.\n * @property {number} [cacheSize] Initial tile cache size. Will auto-grow to hold at least the number of tiles in the viewport.\n * @property {null|string} [crossOrigin] The `crossOrigin` attribute for loaded images.  Note that\n * you must provide a `crossOrigin` value if you want to access pixel data with the Canvas renderer.\n * See https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image for more detail.\n * @property {boolean} [interpolate=true] Use interpolated values when resampling.  By default,\n * linear interpolation is used when resampling.  Set to false to use the nearest neighbor instead.\n * @property {boolean} [opaque=false] Whether the layer is opaque.\n * @property {import(\"../proj.js\").ProjectionLike} [projection='EPSG:3857'] Projection.\n * @property {number} [reprojectionErrorThreshold=0.5] Maximum allowed reprojection error (in pixels).\n * Higher values can increase reprojection performance, but decrease precision.\n * @property {number} [maxZoom=42] Optional max zoom level. Not used if `tileGrid` is provided.\n * @property {number} [minZoom=0] Optional min zoom level. Not used if `tileGrid` is provided.\n * @property {number} [maxResolution] Optional tile grid resolution at level zero. Not used if `tileGrid` is provided.\n * @property {import(\"../tilegrid/TileGrid.js\").default} [tileGrid] Tile grid.\n * @property {import(\"../Tile.js\").LoadFunction} [tileLoadFunction] Optional function to load a tile given a URL. The default is\n * ```js\n * function(imageTile, src) {\n *   imageTile.getImage().src = src;\n * };\n * ```\n * @property {number} [tilePixelRatio=1] The pixel ratio used by the tile service.\n * For example, if the tile service advertizes 256px by 256px tiles but actually sends 512px\n * by 512px images (for retina/hidpi devices) then `tilePixelRatio`\n * should be set to `2`.\n * @property {number|import(\"../size.js\").Size} [tileSize=[256, 256]] The tile size used by the tile service.\n * Not used if `tileGrid` is provided.\n * @property {number} [gutter=0] The size in pixels of the gutter around image tiles to ignore.\n * This allows artifacts of rendering at tile edges to be ignored.\n * Supported images should be wider and taller than the tile size by a value of `2 x gutter`.\n * @property {import(\"../Tile.js\").UrlFunction} [tileUrlFunction] Optional function to get\n * tile URL given a tile coordinate and the projection.\n * Required if `url` or `urls` are not provided.\n * @property {string} [url] URL template. Must include `{x}`, `{y}` or `{-y}`,\n * and `{z}` placeholders. A `{?-?}` template pattern, for example `subdomain{a-f}.domain.com`,\n * may be used instead of defining each one separately in the `urls` option.\n * @property {Array<string>} [urls] An array of URL templates.\n * @property {boolean} [wrapX=true] Whether to wrap the world horizontally.\n * @property {number} [transition=250] Duration of the opacity transition for rendering.\n * To disable the opacity transition, pass `transition: 0`.\n * @property {number|import(\"../array.js\").NearestDirectionFunction} [zDirection=0]\n * Choose whether to use tiles with a higher or lower zoom level when between integer\n * zoom levels. See {@link module:ol/tilegrid/TileGrid~TileGrid#getZForResolution}.\n */\n\n/**\n * @classdesc\n * Layer source for tile data with URLs in a set XYZ format that are\n * defined in a URL template. By default, this follows the widely-used\n * Google grid where `x` 0 and `y` 0 are in the top left. Grids like\n * TMS where `x` 0 and `y` 0 are in the bottom left can be used by\n * using the `{-y}` placeholder in the URL template, so long as the\n * source does not have a custom tile grid. In this case\n * a `tileUrlFunction` can be used, such as:\n * ```js\n *  tileUrlFunction: function(coordinate) {\n *    return 'http://mapserver.com/' + coordinate[0] + '/' +\n *      coordinate[1] + '/' + (-coordinate[2] - 1) + '.png';\n *  }\n * ```\n * @api\n */\nclass XYZ extends TileImage {\n  /**\n   * @param {Options} [options] XYZ options.\n   */\n  constructor(options) {\n    options = options || {};\n\n    const projection =\n      options.projection !== undefined ? options.projection : 'EPSG:3857';\n\n    const tileGrid =\n      options.tileGrid !== undefined\n        ? options.tileGrid\n        : createXYZ({\n            extent: extentFromProjection(projection),\n            maxResolution: options.maxResolution,\n            maxZoom: options.maxZoom,\n            minZoom: options.minZoom,\n            tileSize: options.tileSize,\n          });\n\n    super({\n      attributions: options.attributions,\n      cacheSize: options.cacheSize,\n      crossOrigin: options.crossOrigin,\n      interpolate: options.interpolate,\n      opaque: options.opaque,\n      projection: projection,\n      reprojectionErrorThreshold: options.reprojectionErrorThreshold,\n      tileGrid: tileGrid,\n      tileLoadFunction: options.tileLoadFunction,\n      tilePixelRatio: options.tilePixelRatio,\n      tileUrlFunction: options.tileUrlFunction,\n      url: options.url,\n      urls: options.urls,\n      wrapX: options.wrapX !== undefined ? options.wrapX : true,\n      transition: options.transition,\n      attributionsCollapsible: options.attributionsCollapsible,\n      zDirection: options.zDirection,\n    });\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.gutter_ = options.gutter !== undefined ? options.gutter : 0;\n  }\n\n  /**\n   * @return {number} Gutter.\n   */\n  getGutter() {\n    return this.gutter_;\n  }\n}\n\nexport default XYZ;\n","/**\n * @module ol/source/CartoDB\n */\n\nimport XYZ from './XYZ.js';\n\n/**\n * @typedef {Object} Options\n * @property {import(\"./Source.js\").AttributionLike} [attributions] Attributions.\n * @property {number} [cacheSize] Initial tile cache size. Will auto-grow to hold at least the number of tiles in the viewport.\n * @property {null|string} [crossOrigin] The `crossOrigin` attribute for loaded images.  Note that\n * you must provide a `crossOrigin` value if you want to access pixel data with the Canvas renderer.\n * See https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image for more detail.\n * @property {import(\"../proj.js\").ProjectionLike} [projection='EPSG:3857'] Projection.\n * @property {number} [maxZoom=18] Max zoom.\n * @property {number} [minZoom] Minimum zoom.\n * @property {boolean} [wrapX=true] Whether to wrap the world horizontally.\n * @property {Object} [config] If using anonymous maps, the CartoDB config to use. See\n * https://carto.com/developers/maps-api/guides/anonymous-maps/\n * for more detail.\n * If using named maps, a key-value lookup with the template parameters.\n * See https://carto.com/developers/maps-api/guides/named-maps/\n * for more detail.\n * @property {string} [map] If using named maps, this will be the name of the template to load.\n * See https://carto.com/developers/maps-api/guides/named-maps/\n * for more detail.\n * @property {string} [account] Username as used to access public Carto dashboard at https://{username}.carto.com/.\n * @property {number} [transition=250] Duration of the opacity transition for rendering.\n * To disable the opacity transition, pass `transition: 0`.\n * @property {number|import(\"../array.js\").NearestDirectionFunction} [zDirection=0]\n * Choose whether to use tiles with a higher or lower zoom level when between integer\n * zoom levels. See {@link module:ol/tilegrid/TileGrid~TileGrid#getZForResolution}.\n */\n\n/**\n * @typedef {Object} CartoDBLayerInfo\n * @property {string} layergroupid The layer group ID\n * @property {{https: string}} cdn_url The CDN URL\n */\n\n/**\n * @classdesc\n * Layer source for the CartoDB Maps API.\n * @api\n */\nclass CartoDB extends XYZ {\n  /**\n   * @param {Options} options CartoDB options.\n   */\n  constructor(options) {\n    super({\n      attributions: options.attributions,\n      cacheSize: options.cacheSize,\n      crossOrigin: options.crossOrigin,\n      maxZoom: options.maxZoom !== undefined ? options.maxZoom : 18,\n      minZoom: options.minZoom,\n      projection: options.projection,\n      transition: options.transition,\n      wrapX: options.wrapX,\n      zDirection: options.zDirection,\n    });\n\n    /**\n     * @type {string}\n     * @private\n     */\n    this.account_ = options.account;\n\n    /**\n     * @type {string}\n     * @private\n     */\n    this.mapId_ = options.map || '';\n\n    /**\n     * @type {!Object}\n     * @private\n     */\n    this.config_ = options.config || {};\n\n    /**\n     * @type {!Object<string, CartoDBLayerInfo>}\n     * @private\n     */\n    this.templateCache_ = {};\n\n    this.initializeMap_();\n  }\n\n  /**\n   * Returns the current config.\n   * @return {!Object} The current configuration.\n   * @api\n   */\n  getConfig() {\n    return this.config_;\n  }\n\n  /**\n   * Updates the carto db config.\n   * @param {Object} config a key-value lookup. Values will replace current values\n   *     in the config.\n   * @api\n   */\n  updateConfig(config) {\n    Object.assign(this.config_, config);\n    this.initializeMap_();\n  }\n\n  /**\n   * Sets the CartoDB config\n   * @param {Object} config In the case of anonymous maps, a CartoDB configuration\n   *     object.\n   * If using named maps, a key-value lookup with the template parameters.\n   * @api\n   */\n  setConfig(config) {\n    this.config_ = config || {};\n    this.initializeMap_();\n  }\n\n  /**\n   * Issue a request to initialize the CartoDB map.\n   * @private\n   */\n  initializeMap_() {\n    const paramHash = JSON.stringify(this.config_);\n    if (this.templateCache_[paramHash]) {\n      this.applyTemplate_(this.templateCache_[paramHash]);\n      return;\n    }\n    let mapUrl = 'https://' + this.account_ + '.carto.com/api/v1/map';\n\n    if (this.mapId_) {\n      mapUrl += '/named/' + this.mapId_;\n    }\n\n    const client = new XMLHttpRequest();\n    client.addEventListener(\n      'load',\n      this.handleInitResponse_.bind(this, paramHash)\n    );\n    client.addEventListener('error', this.handleInitError_.bind(this));\n    client.open('POST', mapUrl);\n    client.setRequestHeader('Content-type', 'application/json');\n    client.send(JSON.stringify(this.config_));\n  }\n\n  /**\n   * Handle map initialization response.\n   * @param {string} paramHash a hash representing the parameter set that was used\n   *     for the request\n   * @param {Event} event Event.\n   * @private\n   */\n  handleInitResponse_(paramHash, event) {\n    const client = /** @type {XMLHttpRequest} */ (event.target);\n    // status will be 0 for file:// urls\n    if (!client.status || (client.status >= 200 && client.status < 300)) {\n      let response;\n      try {\n        response = /** @type {CartoDBLayerInfo} */ (\n          JSON.parse(client.responseText)\n        );\n      } catch (err) {\n        this.setState('error');\n        return;\n      }\n      this.applyTemplate_(response);\n      this.templateCache_[paramHash] = response;\n      this.setState('ready');\n    } else {\n      this.setState('error');\n    }\n  }\n\n  /**\n   * @private\n   * @param {Event} event Event.\n   */\n  handleInitError_(event) {\n    this.setState('error');\n  }\n\n  /**\n   * Apply the new tile urls returned by carto db\n   * @param {CartoDBLayerInfo} data Result of carto db call.\n   * @private\n   */\n  applyTemplate_(data) {\n    const tilesUrl =\n      'https://' +\n      data.cdn_url.https +\n      '/' +\n      this.account_ +\n      '/api/v1/map/' +\n      data.layergroupid +\n      '/{z}/{x}/{y}.png';\n    this.setUrl(tilesUrl);\n  }\n}\n\nexport default CartoDB;\n","\nexport default function quickselect(arr, k, left, right, compare) {\n    quickselectStep(arr, k, left || 0, right || (arr.length - 1), compare || defaultCompare);\n}\n\nfunction quickselectStep(arr, k, left, right, compare) {\n\n    while (right > left) {\n        if (right - left > 600) {\n            var n = right - left + 1;\n            var m = k - left + 1;\n            var z = Math.log(n);\n            var s = 0.5 * Math.exp(2 * z / 3);\n            var sd = 0.5 * Math.sqrt(z * s * (n - s) / n) * (m - n / 2 < 0 ? -1 : 1);\n            var newLeft = Math.max(left, Math.floor(k - m * s / n + sd));\n            var newRight = Math.min(right, Math.floor(k + (n - m) * s / n + sd));\n            quickselectStep(arr, k, newLeft, newRight, compare);\n        }\n\n        var t = arr[k];\n        var i = left;\n        var j = right;\n\n        swap(arr, left, k);\n        if (compare(arr[right], t) > 0) swap(arr, left, right);\n\n        while (i < j) {\n            swap(arr, i, j);\n            i++;\n            j--;\n            while (compare(arr[i], t) < 0) i++;\n            while (compare(arr[j], t) > 0) j--;\n        }\n\n        if (compare(arr[left], t) === 0) swap(arr, left, j);\n        else {\n            j++;\n            swap(arr, j, right);\n        }\n\n        if (j <= k) left = j + 1;\n        if (k <= j) right = j - 1;\n    }\n}\n\nfunction swap(arr, i, j) {\n    var tmp = arr[i];\n    arr[i] = arr[j];\n    arr[j] = tmp;\n}\n\nfunction defaultCompare(a, b) {\n    return a < b ? -1 : a > b ? 1 : 0;\n}\n","import quickselect from 'quickselect';\n\nexport default class RBush {\n    constructor(maxEntries = 9) {\n        // max entries in a node is 9 by default; min node fill is 40% for best performance\n        this._maxEntries = Math.max(4, maxEntries);\n        this._minEntries = Math.max(2, Math.ceil(this._maxEntries * 0.4));\n        this.clear();\n    }\n\n    all() {\n        return this._all(this.data, []);\n    }\n\n    search(bbox) {\n        let node = this.data;\n        const result = [];\n\n        if (!intersects(bbox, node)) return result;\n\n        const toBBox = this.toBBox;\n        const nodesToSearch = [];\n\n        while (node) {\n            for (let i = 0; i < node.children.length; i++) {\n                const child = node.children[i];\n                const childBBox = node.leaf ? toBBox(child) : child;\n\n                if (intersects(bbox, childBBox)) {\n                    if (node.leaf) result.push(child);\n                    else if (contains(bbox, childBBox)) this._all(child, result);\n                    else nodesToSearch.push(child);\n                }\n            }\n            node = nodesToSearch.pop();\n        }\n\n        return result;\n    }\n\n    collides(bbox) {\n        let node = this.data;\n\n        if (!intersects(bbox, node)) return false;\n\n        const nodesToSearch = [];\n        while (node) {\n            for (let i = 0; i < node.children.length; i++) {\n                const child = node.children[i];\n                const childBBox = node.leaf ? this.toBBox(child) : child;\n\n                if (intersects(bbox, childBBox)) {\n                    if (node.leaf || contains(bbox, childBBox)) return true;\n                    nodesToSearch.push(child);\n                }\n            }\n            node = nodesToSearch.pop();\n        }\n\n        return false;\n    }\n\n    load(data) {\n        if (!(data && data.length)) return this;\n\n        if (data.length < this._minEntries) {\n            for (let i = 0; i < data.length; i++) {\n                this.insert(data[i]);\n            }\n            return this;\n        }\n\n        // recursively build the tree with the given data from scratch using OMT algorithm\n        let node = this._build(data.slice(), 0, data.length - 1, 0);\n\n        if (!this.data.children.length) {\n            // save as is if tree is empty\n            this.data = node;\n\n        } else if (this.data.height === node.height) {\n            // split root if trees have the same height\n            this._splitRoot(this.data, node);\n\n        } else {\n            if (this.data.height < node.height) {\n                // swap trees if inserted one is bigger\n                const tmpNode = this.data;\n                this.data = node;\n                node = tmpNode;\n            }\n\n            // insert the small tree into the large tree at appropriate level\n            this._insert(node, this.data.height - node.height - 1, true);\n        }\n\n        return this;\n    }\n\n    insert(item) {\n        if (item) this._insert(item, this.data.height - 1);\n        return this;\n    }\n\n    clear() {\n        this.data = createNode([]);\n        return this;\n    }\n\n    remove(item, equalsFn) {\n        if (!item) return this;\n\n        let node = this.data;\n        const bbox = this.toBBox(item);\n        const path = [];\n        const indexes = [];\n        let i, parent, goingUp;\n\n        // depth-first iterative tree traversal\n        while (node || path.length) {\n\n            if (!node) { // go up\n                node = path.pop();\n                parent = path[path.length - 1];\n                i = indexes.pop();\n                goingUp = true;\n            }\n\n            if (node.leaf) { // check current node\n                const index = findItem(item, node.children, equalsFn);\n\n                if (index !== -1) {\n                    // item found, remove the item and condense tree upwards\n                    node.children.splice(index, 1);\n                    path.push(node);\n                    this._condense(path);\n                    return this;\n                }\n            }\n\n            if (!goingUp && !node.leaf && contains(node, bbox)) { // go down\n                path.push(node);\n                indexes.push(i);\n                i = 0;\n                parent = node;\n                node = node.children[0];\n\n            } else if (parent) { // go right\n                i++;\n                node = parent.children[i];\n                goingUp = false;\n\n            } else node = null; // nothing found\n        }\n\n        return this;\n    }\n\n    toBBox(item) { return item; }\n\n    compareMinX(a, b) { return a.minX - b.minX; }\n    compareMinY(a, b) { return a.minY - b.minY; }\n\n    toJSON() { return this.data; }\n\n    fromJSON(data) {\n        this.data = data;\n        return this;\n    }\n\n    _all(node, result) {\n        const nodesToSearch = [];\n        while (node) {\n            if (node.leaf) result.push(...node.children);\n            else nodesToSearch.push(...node.children);\n\n            node = nodesToSearch.pop();\n        }\n        return result;\n    }\n\n    _build(items, left, right, height) {\n\n        const N = right - left + 1;\n        let M = this._maxEntries;\n        let node;\n\n        if (N <= M) {\n            // reached leaf level; return leaf\n            node = createNode(items.slice(left, right + 1));\n            calcBBox(node, this.toBBox);\n            return node;\n        }\n\n        if (!height) {\n            // target height of the bulk-loaded tree\n            height = Math.ceil(Math.log(N) / Math.log(M));\n\n            // target number of root entries to maximize storage utilization\n            M = Math.ceil(N / Math.pow(M, height - 1));\n        }\n\n        node = createNode([]);\n        node.leaf = false;\n        node.height = height;\n\n        // split the items into M mostly square tiles\n\n        const N2 = Math.ceil(N / M);\n        const N1 = N2 * Math.ceil(Math.sqrt(M));\n\n        multiSelect(items, left, right, N1, this.compareMinX);\n\n        for (let i = left; i <= right; i += N1) {\n\n            const right2 = Math.min(i + N1 - 1, right);\n\n            multiSelect(items, i, right2, N2, this.compareMinY);\n\n            for (let j = i; j <= right2; j += N2) {\n\n                const right3 = Math.min(j + N2 - 1, right2);\n\n                // pack each entry recursively\n                node.children.push(this._build(items, j, right3, height - 1));\n            }\n        }\n\n        calcBBox(node, this.toBBox);\n\n        return node;\n    }\n\n    _chooseSubtree(bbox, node, level, path) {\n        while (true) {\n            path.push(node);\n\n            if (node.leaf || path.length - 1 === level) break;\n\n            let minArea = Infinity;\n            let minEnlargement = Infinity;\n            let targetNode;\n\n            for (let i = 0; i < node.children.length; i++) {\n                const child = node.children[i];\n                const area = bboxArea(child);\n                const enlargement = enlargedArea(bbox, child) - area;\n\n                // choose entry with the least area enlargement\n                if (enlargement < minEnlargement) {\n                    minEnlargement = enlargement;\n                    minArea = area < minArea ? area : minArea;\n                    targetNode = child;\n\n                } else if (enlargement === minEnlargement) {\n                    // otherwise choose one with the smallest area\n                    if (area < minArea) {\n                        minArea = area;\n                        targetNode = child;\n                    }\n                }\n            }\n\n            node = targetNode || node.children[0];\n        }\n\n        return node;\n    }\n\n    _insert(item, level, isNode) {\n        const bbox = isNode ? item : this.toBBox(item);\n        const insertPath = [];\n\n        // find the best node for accommodating the item, saving all nodes along the path too\n        const node = this._chooseSubtree(bbox, this.data, level, insertPath);\n\n        // put the item into the node\n        node.children.push(item);\n        extend(node, bbox);\n\n        // split on node overflow; propagate upwards if necessary\n        while (level >= 0) {\n            if (insertPath[level].children.length > this._maxEntries) {\n                this._split(insertPath, level);\n                level--;\n            } else break;\n        }\n\n        // adjust bboxes along the insertion path\n        this._adjustParentBBoxes(bbox, insertPath, level);\n    }\n\n    // split overflowed node into two\n    _split(insertPath, level) {\n        const node = insertPath[level];\n        const M = node.children.length;\n        const m = this._minEntries;\n\n        this._chooseSplitAxis(node, m, M);\n\n        const splitIndex = this._chooseSplitIndex(node, m, M);\n\n        const newNode = createNode(node.children.splice(splitIndex, node.children.length - splitIndex));\n        newNode.height = node.height;\n        newNode.leaf = node.leaf;\n\n        calcBBox(node, this.toBBox);\n        calcBBox(newNode, this.toBBox);\n\n        if (level) insertPath[level - 1].children.push(newNode);\n        else this._splitRoot(node, newNode);\n    }\n\n    _splitRoot(node, newNode) {\n        // split root node\n        this.data = createNode([node, newNode]);\n        this.data.height = node.height + 1;\n        this.data.leaf = false;\n        calcBBox(this.data, this.toBBox);\n    }\n\n    _chooseSplitIndex(node, m, M) {\n        let index;\n        let minOverlap = Infinity;\n        let minArea = Infinity;\n\n        for (let i = m; i <= M - m; i++) {\n            const bbox1 = distBBox(node, 0, i, this.toBBox);\n            const bbox2 = distBBox(node, i, M, this.toBBox);\n\n            const overlap = intersectionArea(bbox1, bbox2);\n            const area = bboxArea(bbox1) + bboxArea(bbox2);\n\n            // choose distribution with minimum overlap\n            if (overlap < minOverlap) {\n                minOverlap = overlap;\n                index = i;\n\n                minArea = area < minArea ? area : minArea;\n\n            } else if (overlap === minOverlap) {\n                // otherwise choose distribution with minimum area\n                if (area < minArea) {\n                    minArea = area;\n                    index = i;\n                }\n            }\n        }\n\n        return index || M - m;\n    }\n\n    // sorts node children by the best axis for split\n    _chooseSplitAxis(node, m, M) {\n        const compareMinX = node.leaf ? this.compareMinX : compareNodeMinX;\n        const compareMinY = node.leaf ? this.compareMinY : compareNodeMinY;\n        const xMargin = this._allDistMargin(node, m, M, compareMinX);\n        const yMargin = this._allDistMargin(node, m, M, compareMinY);\n\n        // if total distributions margin value is minimal for x, sort by minX,\n        // otherwise it's already sorted by minY\n        if (xMargin < yMargin) node.children.sort(compareMinX);\n    }\n\n    // total margin of all possible split distributions where each node is at least m full\n    _allDistMargin(node, m, M, compare) {\n        node.children.sort(compare);\n\n        const toBBox = this.toBBox;\n        const leftBBox = distBBox(node, 0, m, toBBox);\n        const rightBBox = distBBox(node, M - m, M, toBBox);\n        let margin = bboxMargin(leftBBox) + bboxMargin(rightBBox);\n\n        for (let i = m; i < M - m; i++) {\n            const child = node.children[i];\n            extend(leftBBox, node.leaf ? toBBox(child) : child);\n            margin += bboxMargin(leftBBox);\n        }\n\n        for (let i = M - m - 1; i >= m; i--) {\n            const child = node.children[i];\n            extend(rightBBox, node.leaf ? toBBox(child) : child);\n            margin += bboxMargin(rightBBox);\n        }\n\n        return margin;\n    }\n\n    _adjustParentBBoxes(bbox, path, level) {\n        // adjust bboxes along the given tree path\n        for (let i = level; i >= 0; i--) {\n            extend(path[i], bbox);\n        }\n    }\n\n    _condense(path) {\n        // go through the path, removing empty nodes and updating bboxes\n        for (let i = path.length - 1, siblings; i >= 0; i--) {\n            if (path[i].children.length === 0) {\n                if (i > 0) {\n                    siblings = path[i - 1].children;\n                    siblings.splice(siblings.indexOf(path[i]), 1);\n\n                } else this.clear();\n\n            } else calcBBox(path[i], this.toBBox);\n        }\n    }\n}\n\nfunction findItem(item, items, equalsFn) {\n    if (!equalsFn) return items.indexOf(item);\n\n    for (let i = 0; i < items.length; i++) {\n        if (equalsFn(item, items[i])) return i;\n    }\n    return -1;\n}\n\n// calculate node's bbox from bboxes of its children\nfunction calcBBox(node, toBBox) {\n    distBBox(node, 0, node.children.length, toBBox, node);\n}\n\n// min bounding rectangle of node children from k to p-1\nfunction distBBox(node, k, p, toBBox, destNode) {\n    if (!destNode) destNode = createNode(null);\n    destNode.minX = Infinity;\n    destNode.minY = Infinity;\n    destNode.maxX = -Infinity;\n    destNode.maxY = -Infinity;\n\n    for (let i = k; i < p; i++) {\n        const child = node.children[i];\n        extend(destNode, node.leaf ? toBBox(child) : child);\n    }\n\n    return destNode;\n}\n\nfunction extend(a, b) {\n    a.minX = Math.min(a.minX, b.minX);\n    a.minY = Math.min(a.minY, b.minY);\n    a.maxX = Math.max(a.maxX, b.maxX);\n    a.maxY = Math.max(a.maxY, b.maxY);\n    return a;\n}\n\nfunction compareNodeMinX(a, b) { return a.minX - b.minX; }\nfunction compareNodeMinY(a, b) { return a.minY - b.minY; }\n\nfunction bboxArea(a)   { return (a.maxX - a.minX) * (a.maxY - a.minY); }\nfunction bboxMargin(a) { return (a.maxX - a.minX) + (a.maxY - a.minY); }\n\nfunction enlargedArea(a, b) {\n    return (Math.max(b.maxX, a.maxX) - Math.min(b.minX, a.minX)) *\n           (Math.max(b.maxY, a.maxY) - Math.min(b.minY, a.minY));\n}\n\nfunction intersectionArea(a, b) {\n    const minX = Math.max(a.minX, b.minX);\n    const minY = Math.max(a.minY, b.minY);\n    const maxX = Math.min(a.maxX, b.maxX);\n    const maxY = Math.min(a.maxY, b.maxY);\n\n    return Math.max(0, maxX - minX) *\n           Math.max(0, maxY - minY);\n}\n\nfunction contains(a, b) {\n    return a.minX <= b.minX &&\n           a.minY <= b.minY &&\n           b.maxX <= a.maxX &&\n           b.maxY <= a.maxY;\n}\n\nfunction intersects(a, b) {\n    return b.minX <= a.maxX &&\n           b.minY <= a.maxY &&\n           b.maxX >= a.minX &&\n           b.maxY >= a.minY;\n}\n\nfunction createNode(children) {\n    return {\n        children,\n        height: 1,\n        leaf: true,\n        minX: Infinity,\n        minY: Infinity,\n        maxX: -Infinity,\n        maxY: -Infinity\n    };\n}\n\n// sort an array so that items come in groups of n unsorted items, with groups sorted between each other;\n// combines selection algorithm with binary divide & conquer approach\n\nfunction multiSelect(arr, left, right, n, compare) {\n    const stack = [left, right];\n\n    while (stack.length) {\n        right = stack.pop();\n        left = stack.pop();\n\n        if (right - left <= n) continue;\n\n        const mid = left + Math.ceil((right - left) / n / 2) * n;\n        quickselect(arr, mid, left, right, compare);\n\n        stack.push(left, mid, mid, right);\n    }\n}\n","/**\n * @module ol/structs/RBush\n */\nimport RBush_ from 'rbush';\nimport {createOrUpdate, equals} from '../extent.js';\nimport {getUid} from '../util.js';\nimport {isEmpty} from '../obj.js';\n\n/**\n * @typedef {Object} Entry\n * @property {number} minX MinX.\n * @property {number} minY MinY.\n * @property {number} maxX MaxX.\n * @property {number} maxY MaxY.\n * @property {Object} [value] Value.\n */\n\n/**\n * @classdesc\n * Wrapper around the RBush by Vladimir Agafonkin.\n * See https://github.com/mourner/rbush.\n *\n * @template T\n */\nclass RBush {\n  /**\n   * @param {number} [maxEntries] Max entries.\n   */\n  constructor(maxEntries) {\n    /**\n     * @private\n     */\n    this.rbush_ = new RBush_(maxEntries);\n\n    /**\n     * A mapping between the objects added to this rbush wrapper\n     * and the objects that are actually added to the internal rbush.\n     * @private\n     * @type {Object<string, Entry>}\n     */\n    this.items_ = {};\n  }\n\n  /**\n   * Insert a value into the RBush.\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @param {T} value Value.\n   */\n  insert(extent, value) {\n    /** @type {Entry} */\n    const item = {\n      minX: extent[0],\n      minY: extent[1],\n      maxX: extent[2],\n      maxY: extent[3],\n      value: value,\n    };\n\n    this.rbush_.insert(item);\n    this.items_[getUid(value)] = item;\n  }\n\n  /**\n   * Bulk-insert values into the RBush.\n   * @param {Array<import(\"../extent.js\").Extent>} extents Extents.\n   * @param {Array<T>} values Values.\n   */\n  load(extents, values) {\n    const items = new Array(values.length);\n    for (let i = 0, l = values.length; i < l; i++) {\n      const extent = extents[i];\n      const value = values[i];\n\n      /** @type {Entry} */\n      const item = {\n        minX: extent[0],\n        minY: extent[1],\n        maxX: extent[2],\n        maxY: extent[3],\n        value: value,\n      };\n      items[i] = item;\n      this.items_[getUid(value)] = item;\n    }\n    this.rbush_.load(items);\n  }\n\n  /**\n   * Remove a value from the RBush.\n   * @param {T} value Value.\n   * @return {boolean} Removed.\n   */\n  remove(value) {\n    const uid = getUid(value);\n\n    // get the object in which the value was wrapped when adding to the\n    // internal rbush. then use that object to do the removal.\n    const item = this.items_[uid];\n    delete this.items_[uid];\n    return this.rbush_.remove(item) !== null;\n  }\n\n  /**\n   * Update the extent of a value in the RBush.\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @param {T} value Value.\n   */\n  update(extent, value) {\n    const item = this.items_[getUid(value)];\n    const bbox = [item.minX, item.minY, item.maxX, item.maxY];\n    if (!equals(bbox, extent)) {\n      this.remove(value);\n      this.insert(extent, value);\n    }\n  }\n\n  /**\n   * Return all values in the RBush.\n   * @return {Array<T>} All.\n   */\n  getAll() {\n    const items = this.rbush_.all();\n    return items.map(function (item) {\n      return item.value;\n    });\n  }\n\n  /**\n   * Return all values in the given extent.\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @return {Array<T>} All in extent.\n   */\n  getInExtent(extent) {\n    /** @type {Entry} */\n    const bbox = {\n      minX: extent[0],\n      minY: extent[1],\n      maxX: extent[2],\n      maxY: extent[3],\n    };\n    const items = this.rbush_.search(bbox);\n    return items.map(function (item) {\n      return item.value;\n    });\n  }\n\n  /**\n   * Calls a callback function with each value in the tree.\n   * If the callback returns a truthy value, this value is returned without\n   * checking the rest of the tree.\n   * @param {function(T): *} callback Callback.\n   * @return {*} Callback return value.\n   */\n  forEach(callback) {\n    return this.forEach_(this.getAll(), callback);\n  }\n\n  /**\n   * Calls a callback function with each value in the provided extent.\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @param {function(T): *} callback Callback.\n   * @return {*} Callback return value.\n   */\n  forEachInExtent(extent, callback) {\n    return this.forEach_(this.getInExtent(extent), callback);\n  }\n\n  /**\n   * @param {Array<T>} values Values.\n   * @param {function(T): *} callback Callback.\n   * @private\n   * @return {*} Callback return value.\n   */\n  forEach_(values, callback) {\n    let result;\n    for (let i = 0, l = values.length; i < l; i++) {\n      result = callback(values[i]);\n      if (result) {\n        return result;\n      }\n    }\n    return result;\n  }\n\n  /**\n   * @return {boolean} Is empty.\n   */\n  isEmpty() {\n    return isEmpty(this.items_);\n  }\n\n  /**\n   * Remove all values from the RBush.\n   */\n  clear() {\n    this.rbush_.clear();\n    this.items_ = {};\n  }\n\n  /**\n   * @param {import(\"../extent.js\").Extent} [extent] Extent.\n   * @return {import(\"../extent.js\").Extent} Extent.\n   */\n  getExtent(extent) {\n    const data = this.rbush_.toJSON();\n    return createOrUpdate(data.minX, data.minY, data.maxX, data.maxY, extent);\n  }\n\n  /**\n   * @param {RBush} rbush R-Tree.\n   */\n  concat(rbush) {\n    this.rbush_.load(rbush.rbush_.all());\n    for (const i in rbush.items_) {\n      this.items_[i] = rbush.items_[i];\n    }\n  }\n}\n\nexport default RBush;\n","/**\n * @module ol/source/VectorEventType\n */\n\n/**\n * @enum {string}\n */\nexport default {\n  /**\n   * Triggered when a feature is added to the source.\n   * @event module:ol/source/Vector.VectorSourceEvent#addfeature\n   * @api\n   */\n  ADDFEATURE: 'addfeature',\n\n  /**\n   * Triggered when a feature is updated.\n   * @event module:ol/source/Vector.VectorSourceEvent#changefeature\n   * @api\n   */\n  CHANGEFEATURE: 'changefeature',\n\n  /**\n   * Triggered when the clear method is called on the source.\n   * @event module:ol/source/Vector.VectorSourceEvent#clear\n   * @api\n   */\n  CLEAR: 'clear',\n\n  /**\n   * Triggered when a feature is removed from the source.\n   * See {@link module:ol/source/Vector~VectorSource#clear source.clear()} for exceptions.\n   * @event module:ol/source/Vector.VectorSourceEvent#removefeature\n   * @api\n   */\n  REMOVEFEATURE: 'removefeature',\n\n  /**\n   * Triggered when features starts loading.\n   * @event module:ol/source/Vector.VectorSourceEvent#featuresloadstart\n   * @api\n   */\n  FEATURESLOADSTART: 'featuresloadstart',\n\n  /**\n   * Triggered when features finishes loading.\n   * @event module:ol/source/Vector.VectorSourceEvent#featuresloadend\n   * @api\n   */\n  FEATURESLOADEND: 'featuresloadend',\n\n  /**\n   * Triggered if feature loading results in an error.\n   * @event module:ol/source/Vector.VectorSourceEvent#featuresloaderror\n   * @api\n   */\n  FEATURESLOADERROR: 'featuresloaderror',\n};\n\n/**\n * @typedef {'addfeature'|'changefeature'|'clear'|'removefeature'|'featuresloadstart'|'featuresloadend'|'featuresloaderror'} VectorSourceEventTypes\n */\n","/**\n * @module ol/source/Vector\n */\n\nimport Collection from '../Collection.js';\nimport CollectionEventType from '../CollectionEventType.js';\nimport Event from '../events/Event.js';\nimport EventType from '../events/EventType.js';\nimport ObjectEventType from '../ObjectEventType.js';\nimport RBush from '../structs/RBush.js';\nimport Source from './Source.js';\nimport VectorEventType from './VectorEventType.js';\nimport {TRUE, VOID} from '../functions.js';\nimport {all as allStrategy} from '../loadingstrategy.js';\nimport {assert} from '../asserts.js';\nimport {containsExtent, equals, wrapAndSliceX} from '../extent.js';\nimport {extend} from '../array.js';\nimport {getUid} from '../util.js';\nimport {isEmpty} from '../obj.js';\nimport {listen, unlistenByKey} from '../events.js';\nimport {xhr} from '../featureloader.js';\n\n/**\n * A function that takes an {@link module:ol/extent~Extent} and a resolution as arguments, and\n * returns an array of {@link module:ol/extent~Extent} with the extents to load. Usually this\n * is one of the standard {@link module:ol/loadingstrategy} strategies.\n *\n * @typedef {function(import(\"../extent.js\").Extent, number, import(\"../proj/Projection.js\").default): Array<import(\"../extent.js\").Extent>} LoadingStrategy\n * @api\n */\n\n/**\n * @classdesc\n * Events emitted by {@link module:ol/source/Vector~VectorSource} instances are instances of this\n * type.\n * @template {import(\"../geom/Geometry.js\").default} [Geometry=import(\"../geom/Geometry.js\").default]\n */\nexport class VectorSourceEvent extends Event {\n  /**\n   * @param {string} type Type.\n   * @param {import(\"../Feature.js\").default<Geometry>} [feature] Feature.\n   * @param {Array<import(\"../Feature.js\").default<Geometry>>} [features] Features.\n   */\n  constructor(type, feature, features) {\n    super(type);\n\n    /**\n     * The added or removed feature for the `ADDFEATURE` and `REMOVEFEATURE` events, `undefined` otherwise.\n     * @type {import(\"../Feature.js\").default<Geometry>|undefined}\n     * @api\n     */\n    this.feature = feature;\n\n    /**\n     * The loaded features for the `FEATURESLOADED` event, `undefined` otherwise.\n     * @type {Array<import(\"../Feature.js\").default<Geometry>>|undefined}\n     * @api\n     */\n    this.features = features;\n  }\n}\n\n/***\n * @template Return\n * @typedef {import(\"../Observable\").OnSignature<import(\"../Observable\").EventTypes, import(\"../events/Event.js\").default, Return> &\n *   import(\"../Observable\").OnSignature<import(\"../ObjectEventType\").Types, import(\"../Object\").ObjectEvent, Return> &\n *   import(\"../Observable\").OnSignature<import(\"./VectorEventType\").VectorSourceEventTypes, VectorSourceEvent, Return> &\n *   import(\"../Observable\").CombinedOnSignature<import(\"../Observable\").EventTypes|import(\"../ObjectEventType\").Types|\n *     import(\"./VectorEventType\").VectorSourceEventTypes, Return>} VectorSourceOnSignature\n */\n\n/**\n * @template {import(\"../geom/Geometry.js\").default} [Geometry=import(\"../geom/Geometry.js\").default]\n * @typedef {Object} Options\n * @property {import(\"./Source.js\").AttributionLike} [attributions] Attributions.\n * @property {Array<import(\"../Feature.js\").default<Geometry>>|Collection<import(\"../Feature.js\").default<Geometry>>} [features]\n * Features. If provided as {@link module:ol/Collection~Collection}, the features in the source\n * and the collection will stay in sync.\n * @property {import(\"../format/Feature.js\").default} [format] The feature format used by the XHR\n * feature loader when `url` is set. Required if `url` is set, otherwise ignored.\n * @property {import(\"../featureloader.js\").FeatureLoader} [loader]\n * The loader function used to load features, from a remote source for example.\n * If this is not set and `url` is set, the source will create and use an XHR\n * feature loader. The `'featuresloadend'` and `'featuresloaderror'` events\n * will only fire if the `success` and `failure` callbacks are used.\n *\n * Example:\n *\n * ```js\n * import Vector from 'ol/source/Vector.js';\n * import GeoJSON from 'ol/format/GeoJSON.js';\n * import {bbox} from 'ol/loadingstrategy.js';\n *\n * const vectorSource = new Vector({\n *   format: new GeoJSON(),\n *   loader: function(extent, resolution, projection, success, failure) {\n *      const proj = projection.getCode();\n *      const url = 'https://ahocevar.com/geoserver/wfs?service=WFS&' +\n *          'version=1.1.0&request=GetFeature&typename=osm:water_areas&' +\n *          'outputFormat=application/json&srsname=' + proj + '&' +\n *          'bbox=' + extent.join(',') + ',' + proj;\n *      const xhr = new XMLHttpRequest();\n *      xhr.open('GET', url);\n *      const onError = function() {\n *        vectorSource.removeLoadedExtent(extent);\n *        failure();\n *      }\n *      xhr.onerror = onError;\n *      xhr.onload = function() {\n *        if (xhr.status == 200) {\n *          const features = vectorSource.getFormat().readFeatures(xhr.responseText);\n *          vectorSource.addFeatures(features);\n *          success(features);\n *        } else {\n *          onError();\n *        }\n *      }\n *      xhr.send();\n *    },\n *    strategy: bbox,\n *  });\n * ```\n * @property {boolean} [overlaps=true] This source may have overlapping geometries.\n * Setting this to `false` (e.g. for sources with polygons that represent administrative\n * boundaries or TopoJSON sources) allows the renderer to optimise fill and\n * stroke operations.\n * @property {LoadingStrategy} [strategy] The loading strategy to use.\n * By default an {@link module:ol/loadingstrategy.all}\n * strategy is used, a one-off strategy which loads all features at once.\n * @property {string|import(\"../featureloader.js\").FeatureUrlFunction} [url]\n * Setting this option instructs the source to load features using an XHR loader\n * (see {@link module:ol/featureloader.xhr}). Use a `string` and an\n * {@link module:ol/loadingstrategy.all} for a one-off download of all features from\n * the given URL. Use a {@link module:ol/featureloader~FeatureUrlFunction} to generate the url with\n * other loading strategies.\n * Requires `format` to be set as well.\n * When default XHR feature loader is provided, the features will\n * be transformed from the data projection to the view projection\n * during parsing. If your remote data source does not advertise its projection\n * properly, this transformation will be incorrect. For some formats, the\n * default projection (usually EPSG:4326) can be overridden by setting the\n * dataProjection constructor option on the format.\n * Note that if a source contains non-feature data, such as a GeoJSON geometry\n * or a KML NetworkLink, these will be ignored. Use a custom loader to load these.\n * @property {boolean} [useSpatialIndex=true]\n * By default, an RTree is used as spatial index. When features are removed and\n * added frequently, and the total number of features is low, setting this to\n * `false` may improve performance.\n *\n * Note that\n * {@link module:ol/source/Vector~VectorSource#getFeaturesInExtent},\n * {@link module:ol/source/Vector~VectorSource#getClosestFeatureToCoordinate} and\n * {@link module:ol/source/Vector~VectorSource#getExtent} cannot be used when `useSpatialIndex` is\n * set to `false`, and {@link module:ol/source/Vector~VectorSource#forEachFeatureInExtent} will loop\n * through all features.\n *\n * When set to `false`, the features will be maintained in an\n * {@link module:ol/Collection~Collection}, which can be retrieved through\n * {@link module:ol/source/Vector~VectorSource#getFeaturesCollection}.\n * @property {boolean} [wrapX=true] Wrap the world horizontally. For vector editing across the\n * -180° and 180° meridians to work properly, this should be set to `false`. The\n * resulting geometry coordinates will then exceed the world bounds.\n */\n\n/**\n * @classdesc\n * Provides a source of features for vector layers. Vector features provided\n * by this source are suitable for editing. See {@link module:ol/source/VectorTile~VectorTile} for\n * vector data that is optimized for rendering.\n *\n * @fires VectorSourceEvent\n * @api\n * @template {import(\"../geom/Geometry.js\").default} [Geometry=import(\"../geom/Geometry.js\").default]\n */\nclass VectorSource extends Source {\n  /**\n   * @param {Options<Geometry>} [options] Vector source options.\n   */\n  constructor(options) {\n    options = options || {};\n\n    super({\n      attributions: options.attributions,\n      interpolate: true,\n      projection: undefined,\n      state: 'ready',\n      wrapX: options.wrapX !== undefined ? options.wrapX : true,\n    });\n\n    /***\n     * @type {VectorSourceOnSignature<import(\"../events\").EventsKey>}\n     */\n    this.on;\n\n    /***\n     * @type {VectorSourceOnSignature<import(\"../events\").EventsKey>}\n     */\n    this.once;\n\n    /***\n     * @type {VectorSourceOnSignature<void>}\n     */\n    this.un;\n\n    /**\n     * @private\n     * @type {import(\"../featureloader.js\").FeatureLoader}\n     */\n    this.loader_ = VOID;\n\n    /**\n     * @private\n     * @type {import(\"../format/Feature.js\").default|undefined}\n     */\n    this.format_ = options.format;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.overlaps_ = options.overlaps === undefined ? true : options.overlaps;\n\n    /**\n     * @private\n     * @type {string|import(\"../featureloader.js\").FeatureUrlFunction|undefined}\n     */\n    this.url_ = options.url;\n\n    if (options.loader !== undefined) {\n      this.loader_ = options.loader;\n    } else if (this.url_ !== undefined) {\n      assert(this.format_, 7); // `format` must be set when `url` is set\n      // create a XHR feature loader for \"url\" and \"format\"\n      this.loader_ = xhr(\n        this.url_,\n        /** @type {import(\"../format/Feature.js\").default} */ (this.format_)\n      );\n    }\n\n    /**\n     * @private\n     * @type {LoadingStrategy}\n     */\n    this.strategy_ =\n      options.strategy !== undefined ? options.strategy : allStrategy;\n\n    const useSpatialIndex =\n      options.useSpatialIndex !== undefined ? options.useSpatialIndex : true;\n\n    /**\n     * @private\n     * @type {RBush<import(\"../Feature.js\").default<Geometry>>}\n     */\n    this.featuresRtree_ = useSpatialIndex ? new RBush() : null;\n\n    /**\n     * @private\n     * @type {RBush<{extent: import(\"../extent.js\").Extent}>}\n     */\n    this.loadedExtentsRtree_ = new RBush();\n\n    /**\n     * @type {number}\n     * @private\n     */\n    this.loadingExtentsCount_ = 0;\n\n    /**\n     * @private\n     * @type {!Object<string, import(\"../Feature.js\").default<Geometry>>}\n     */\n    this.nullGeometryFeatures_ = {};\n\n    /**\n     * A lookup of features by id (the return from feature.getId()).\n     * @private\n     * @type {!Object<string, import(\"../Feature.js\").default<Geometry>>}\n     */\n    this.idIndex_ = {};\n\n    /**\n     * A lookup of features by uid (using getUid(feature)).\n     * @private\n     * @type {!Object<string, import(\"../Feature.js\").default<Geometry>>}\n     */\n    this.uidIndex_ = {};\n\n    /**\n     * @private\n     * @type {Object<string, Array<import(\"../events.js\").EventsKey>>}\n     */\n    this.featureChangeKeys_ = {};\n\n    /**\n     * @private\n     * @type {Collection<import(\"../Feature.js\").default<Geometry>>|null}\n     */\n    this.featuresCollection_ = null;\n\n    /** @type {Collection<import(\"../Feature.js\").default<Geometry>>} */\n    let collection;\n    /** @type {Array<import(\"../Feature.js\").default<Geometry>>} */\n    let features;\n    if (Array.isArray(options.features)) {\n      features = options.features;\n    } else if (options.features) {\n      collection = options.features;\n      features = collection.getArray();\n    }\n    if (!useSpatialIndex && collection === undefined) {\n      collection = new Collection(features);\n    }\n    if (features !== undefined) {\n      this.addFeaturesInternal(features);\n    }\n    if (collection !== undefined) {\n      this.bindFeaturesCollection_(collection);\n    }\n  }\n\n  /**\n   * Add a single feature to the source.  If you want to add a batch of features\n   * at once, call {@link module:ol/source/Vector~VectorSource#addFeatures #addFeatures()}\n   * instead. A feature will not be added to the source if feature with\n   * the same id is already there. The reason for this behavior is to avoid\n   * feature duplication when using bbox or tile loading strategies.\n   * Note: this also applies if an {@link module:ol/Collection~Collection} is used for features,\n   * meaning that if a feature with a duplicate id is added in the collection, it will\n   * be removed from it right away.\n   * @param {import(\"../Feature.js\").default<Geometry>} feature Feature to add.\n   * @api\n   */\n  addFeature(feature) {\n    this.addFeatureInternal(feature);\n    this.changed();\n  }\n\n  /**\n   * Add a feature without firing a `change` event.\n   * @param {import(\"../Feature.js\").default<Geometry>} feature Feature.\n   * @protected\n   */\n  addFeatureInternal(feature) {\n    const featureKey = getUid(feature);\n\n    if (!this.addToIndex_(featureKey, feature)) {\n      if (this.featuresCollection_) {\n        this.featuresCollection_.remove(feature);\n      }\n      return;\n    }\n\n    this.setupChangeEvents_(featureKey, feature);\n\n    const geometry = feature.getGeometry();\n    if (geometry) {\n      const extent = geometry.getExtent();\n      if (this.featuresRtree_) {\n        this.featuresRtree_.insert(extent, feature);\n      }\n    } else {\n      this.nullGeometryFeatures_[featureKey] = feature;\n    }\n\n    this.dispatchEvent(\n      new VectorSourceEvent(VectorEventType.ADDFEATURE, feature)\n    );\n  }\n\n  /**\n   * @param {string} featureKey Unique identifier for the feature.\n   * @param {import(\"../Feature.js\").default<Geometry>} feature The feature.\n   * @private\n   */\n  setupChangeEvents_(featureKey, feature) {\n    this.featureChangeKeys_[featureKey] = [\n      listen(feature, EventType.CHANGE, this.handleFeatureChange_, this),\n      listen(\n        feature,\n        ObjectEventType.PROPERTYCHANGE,\n        this.handleFeatureChange_,\n        this\n      ),\n    ];\n  }\n\n  /**\n   * @param {string} featureKey Unique identifier for the feature.\n   * @param {import(\"../Feature.js\").default<Geometry>} feature The feature.\n   * @return {boolean} The feature is \"valid\", in the sense that it is also a\n   *     candidate for insertion into the Rtree.\n   * @private\n   */\n  addToIndex_(featureKey, feature) {\n    let valid = true;\n    const id = feature.getId();\n    if (id !== undefined) {\n      if (!(id.toString() in this.idIndex_)) {\n        this.idIndex_[id.toString()] = feature;\n      } else {\n        valid = false;\n      }\n    }\n    if (valid) {\n      assert(!(featureKey in this.uidIndex_), 30); // The passed `feature` was already added to the source\n      this.uidIndex_[featureKey] = feature;\n    }\n    return valid;\n  }\n\n  /**\n   * Add a batch of features to the source.\n   * @param {Array<import(\"../Feature.js\").default<Geometry>>} features Features to add.\n   * @api\n   */\n  addFeatures(features) {\n    this.addFeaturesInternal(features);\n    this.changed();\n  }\n\n  /**\n   * Add features without firing a `change` event.\n   * @param {Array<import(\"../Feature.js\").default<Geometry>>} features Features.\n   * @protected\n   */\n  addFeaturesInternal(features) {\n    const extents = [];\n    const newFeatures = [];\n    const geometryFeatures = [];\n\n    for (let i = 0, length = features.length; i < length; i++) {\n      const feature = features[i];\n      const featureKey = getUid(feature);\n      if (this.addToIndex_(featureKey, feature)) {\n        newFeatures.push(feature);\n      }\n    }\n\n    for (let i = 0, length = newFeatures.length; i < length; i++) {\n      const feature = newFeatures[i];\n      const featureKey = getUid(feature);\n      this.setupChangeEvents_(featureKey, feature);\n\n      const geometry = feature.getGeometry();\n      if (geometry) {\n        const extent = geometry.getExtent();\n        extents.push(extent);\n        geometryFeatures.push(feature);\n      } else {\n        this.nullGeometryFeatures_[featureKey] = feature;\n      }\n    }\n    if (this.featuresRtree_) {\n      this.featuresRtree_.load(extents, geometryFeatures);\n    }\n\n    if (this.hasListener(VectorEventType.ADDFEATURE)) {\n      for (let i = 0, length = newFeatures.length; i < length; i++) {\n        this.dispatchEvent(\n          new VectorSourceEvent(VectorEventType.ADDFEATURE, newFeatures[i])\n        );\n      }\n    }\n  }\n\n  /**\n   * @param {!Collection<import(\"../Feature.js\").default<Geometry>>} collection Collection.\n   * @private\n   */\n  bindFeaturesCollection_(collection) {\n    let modifyingCollection = false;\n    this.addEventListener(\n      VectorEventType.ADDFEATURE,\n      /**\n       * @param {VectorSourceEvent<Geometry>} evt The vector source event\n       */\n      function (evt) {\n        if (!modifyingCollection) {\n          modifyingCollection = true;\n          collection.push(evt.feature);\n          modifyingCollection = false;\n        }\n      }\n    );\n    this.addEventListener(\n      VectorEventType.REMOVEFEATURE,\n      /**\n       * @param {VectorSourceEvent<Geometry>} evt The vector source event\n       */\n      function (evt) {\n        if (!modifyingCollection) {\n          modifyingCollection = true;\n          collection.remove(evt.feature);\n          modifyingCollection = false;\n        }\n      }\n    );\n    collection.addEventListener(\n      CollectionEventType.ADD,\n      /**\n       * @param {import(\"../Collection.js\").CollectionEvent<import(\"../Feature.js\").default<Geometry>>} evt The collection event\n       */\n      (evt) => {\n        if (!modifyingCollection) {\n          modifyingCollection = true;\n          this.addFeature(evt.element);\n          modifyingCollection = false;\n        }\n      }\n    );\n    collection.addEventListener(\n      CollectionEventType.REMOVE,\n      /**\n       * @param {import(\"../Collection.js\").CollectionEvent<import(\"../Feature.js\").default<Geometry>>} evt The collection event\n       */\n      (evt) => {\n        if (!modifyingCollection) {\n          modifyingCollection = true;\n          this.removeFeature(evt.element);\n          modifyingCollection = false;\n        }\n      }\n    );\n    this.featuresCollection_ = collection;\n  }\n\n  /**\n   * Remove all features from the source.\n   * @param {boolean} [fast] Skip dispatching of {@link module:ol/source/Vector.VectorSourceEvent#event:removefeature} events.\n   * @api\n   */\n  clear(fast) {\n    if (fast) {\n      for (const featureId in this.featureChangeKeys_) {\n        const keys = this.featureChangeKeys_[featureId];\n        keys.forEach(unlistenByKey);\n      }\n      if (!this.featuresCollection_) {\n        this.featureChangeKeys_ = {};\n        this.idIndex_ = {};\n        this.uidIndex_ = {};\n      }\n    } else {\n      if (this.featuresRtree_) {\n        const removeAndIgnoreReturn = (feature) => {\n          this.removeFeatureInternal(feature);\n        };\n        this.featuresRtree_.forEach(removeAndIgnoreReturn);\n        for (const id in this.nullGeometryFeatures_) {\n          this.removeFeatureInternal(this.nullGeometryFeatures_[id]);\n        }\n      }\n    }\n    if (this.featuresCollection_) {\n      this.featuresCollection_.clear();\n    }\n\n    if (this.featuresRtree_) {\n      this.featuresRtree_.clear();\n    }\n    this.nullGeometryFeatures_ = {};\n\n    const clearEvent = new VectorSourceEvent(VectorEventType.CLEAR);\n    this.dispatchEvent(clearEvent);\n    this.changed();\n  }\n\n  /**\n   * Iterate through all features on the source, calling the provided callback\n   * with each one.  If the callback returns any \"truthy\" value, iteration will\n   * stop and the function will return the same value.\n   * Note: this function only iterate through the feature that have a defined geometry.\n   *\n   * @param {function(import(\"../Feature.js\").default<Geometry>): T} callback Called with each feature\n   *     on the source.  Return a truthy value to stop iteration.\n   * @return {T|undefined} The return value from the last call to the callback.\n   * @template T\n   * @api\n   */\n  forEachFeature(callback) {\n    if (this.featuresRtree_) {\n      return this.featuresRtree_.forEach(callback);\n    }\n    if (this.featuresCollection_) {\n      this.featuresCollection_.forEach(callback);\n    }\n  }\n\n  /**\n   * Iterate through all features whose geometries contain the provided\n   * coordinate, calling the callback with each feature.  If the callback returns\n   * a \"truthy\" value, iteration will stop and the function will return the same\n   * value.\n   *\n   * @param {import(\"../coordinate.js\").Coordinate} coordinate Coordinate.\n   * @param {function(import(\"../Feature.js\").default<Geometry>): T} callback Called with each feature\n   *     whose goemetry contains the provided coordinate.\n   * @return {T|undefined} The return value from the last call to the callback.\n   * @template T\n   */\n  forEachFeatureAtCoordinateDirect(coordinate, callback) {\n    const extent = [coordinate[0], coordinate[1], coordinate[0], coordinate[1]];\n    return this.forEachFeatureInExtent(extent, function (feature) {\n      const geometry = feature.getGeometry();\n      if (geometry.intersectsCoordinate(coordinate)) {\n        return callback(feature);\n      }\n      return undefined;\n    });\n  }\n\n  /**\n   * Iterate through all features whose bounding box intersects the provided\n   * extent (note that the feature's geometry may not intersect the extent),\n   * calling the callback with each feature.  If the callback returns a \"truthy\"\n   * value, iteration will stop and the function will return the same value.\n   *\n   * If you are interested in features whose geometry intersects an extent, call\n   * the {@link module:ol/source/Vector~VectorSource#forEachFeatureIntersectingExtent #forEachFeatureIntersectingExtent()} method instead.\n   *\n   * When `useSpatialIndex` is set to false, this method will loop through all\n   * features, equivalent to {@link module:ol/source/Vector~VectorSource#forEachFeature #forEachFeature()}.\n   *\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @param {function(import(\"../Feature.js\").default<Geometry>): T} callback Called with each feature\n   *     whose bounding box intersects the provided extent.\n   * @return {T|undefined} The return value from the last call to the callback.\n   * @template T\n   * @api\n   */\n  forEachFeatureInExtent(extent, callback) {\n    if (this.featuresRtree_) {\n      return this.featuresRtree_.forEachInExtent(extent, callback);\n    }\n    if (this.featuresCollection_) {\n      this.featuresCollection_.forEach(callback);\n    }\n  }\n\n  /**\n   * Iterate through all features whose geometry intersects the provided extent,\n   * calling the callback with each feature.  If the callback returns a \"truthy\"\n   * value, iteration will stop and the function will return the same value.\n   *\n   * If you only want to test for bounding box intersection, call the\n   * {@link module:ol/source/Vector~VectorSource#forEachFeatureInExtent #forEachFeatureInExtent()} method instead.\n   *\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @param {function(import(\"../Feature.js\").default<Geometry>): T} callback Called with each feature\n   *     whose geometry intersects the provided extent.\n   * @return {T|undefined} The return value from the last call to the callback.\n   * @template T\n   * @api\n   */\n  forEachFeatureIntersectingExtent(extent, callback) {\n    return this.forEachFeatureInExtent(\n      extent,\n      /**\n       * @param {import(\"../Feature.js\").default<Geometry>} feature Feature.\n       * @return {T|undefined} The return value from the last call to the callback.\n       */\n      function (feature) {\n        const geometry = feature.getGeometry();\n        if (geometry.intersectsExtent(extent)) {\n          const result = callback(feature);\n          if (result) {\n            return result;\n          }\n        }\n      }\n    );\n  }\n\n  /**\n   * Get the features collection associated with this source. Will be `null`\n   * unless the source was configured with `useSpatialIndex` set to `false`, or\n   * with an {@link module:ol/Collection~Collection} as `features`.\n   * @return {Collection<import(\"../Feature.js\").default<Geometry>>|null} The collection of features.\n   * @api\n   */\n  getFeaturesCollection() {\n    return this.featuresCollection_;\n  }\n\n  /**\n   * Get a snapshot of the features currently on the source in random order. The returned array\n   * is a copy, the features are references to the features in the source.\n   * @return {Array<import(\"../Feature.js\").default<Geometry>>} Features.\n   * @api\n   */\n  getFeatures() {\n    let features;\n    if (this.featuresCollection_) {\n      features = this.featuresCollection_.getArray().slice(0);\n    } else if (this.featuresRtree_) {\n      features = this.featuresRtree_.getAll();\n      if (!isEmpty(this.nullGeometryFeatures_)) {\n        extend(features, Object.values(this.nullGeometryFeatures_));\n      }\n    }\n    return /** @type {Array<import(\"../Feature.js\").default<Geometry>>} */ (\n      features\n    );\n  }\n\n  /**\n   * Get all features whose geometry intersects the provided coordinate.\n   * @param {import(\"../coordinate.js\").Coordinate} coordinate Coordinate.\n   * @return {Array<import(\"../Feature.js\").default<Geometry>>} Features.\n   * @api\n   */\n  getFeaturesAtCoordinate(coordinate) {\n    const features = [];\n    this.forEachFeatureAtCoordinateDirect(coordinate, function (feature) {\n      features.push(feature);\n    });\n    return features;\n  }\n\n  /**\n   * Get all features whose bounding box intersects the provided extent.  Note that this returns an array of\n   * all features intersecting the given extent in random order (so it may include\n   * features whose geometries do not intersect the extent).\n   *\n   * When `useSpatialIndex` is set to false, this method will return all\n   * features.\n   *\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @param {import(\"../proj/Projection.js\").default} [projection] Include features\n   * where `extent` exceeds the x-axis bounds of `projection` and wraps around the world.\n   * @return {Array<import(\"../Feature.js\").default<Geometry>>} Features.\n   * @api\n   */\n  getFeaturesInExtent(extent, projection) {\n    if (this.featuresRtree_) {\n      const multiWorld = projection && projection.canWrapX() && this.getWrapX();\n\n      if (!multiWorld) {\n        return this.featuresRtree_.getInExtent(extent);\n      }\n\n      const extents = wrapAndSliceX(extent, projection);\n\n      return [].concat(\n        ...extents.map((anExtent) => this.featuresRtree_.getInExtent(anExtent))\n      );\n    }\n    if (this.featuresCollection_) {\n      return this.featuresCollection_.getArray().slice(0);\n    }\n    return [];\n  }\n\n  /**\n   * Get the closest feature to the provided coordinate.\n   *\n   * This method is not available when the source is configured with\n   * `useSpatialIndex` set to `false`.\n   * @param {import(\"../coordinate.js\").Coordinate} coordinate Coordinate.\n   * @param {function(import(\"../Feature.js\").default<Geometry>):boolean} [filter] Feature filter function.\n   *     The filter function will receive one argument, the {@link module:ol/Feature~Feature feature}\n   *     and it should return a boolean value. By default, no filtering is made.\n   * @return {import(\"../Feature.js\").default<Geometry>} Closest feature.\n   * @api\n   */\n  getClosestFeatureToCoordinate(coordinate, filter) {\n    // Find the closest feature using branch and bound.  We start searching an\n    // infinite extent, and find the distance from the first feature found.  This\n    // becomes the closest feature.  We then compute a smaller extent which any\n    // closer feature must intersect.  We continue searching with this smaller\n    // extent, trying to find a closer feature.  Every time we find a closer\n    // feature, we update the extent being searched so that any even closer\n    // feature must intersect it.  We continue until we run out of features.\n    const x = coordinate[0];\n    const y = coordinate[1];\n    let closestFeature = null;\n    const closestPoint = [NaN, NaN];\n    let minSquaredDistance = Infinity;\n    const extent = [-Infinity, -Infinity, Infinity, Infinity];\n    filter = filter ? filter : TRUE;\n    this.featuresRtree_.forEachInExtent(\n      extent,\n      /**\n       * @param {import(\"../Feature.js\").default<Geometry>} feature Feature.\n       */\n      function (feature) {\n        if (filter(feature)) {\n          const geometry = feature.getGeometry();\n          const previousMinSquaredDistance = minSquaredDistance;\n          minSquaredDistance = geometry.closestPointXY(\n            x,\n            y,\n            closestPoint,\n            minSquaredDistance\n          );\n          if (minSquaredDistance < previousMinSquaredDistance) {\n            closestFeature = feature;\n            // This is sneaky.  Reduce the extent that it is currently being\n            // searched while the R-Tree traversal using this same extent object\n            // is still in progress.  This is safe because the new extent is\n            // strictly contained by the old extent.\n            const minDistance = Math.sqrt(minSquaredDistance);\n            extent[0] = x - minDistance;\n            extent[1] = y - minDistance;\n            extent[2] = x + minDistance;\n            extent[3] = y + minDistance;\n          }\n        }\n      }\n    );\n    return closestFeature;\n  }\n\n  /**\n   * Get the extent of the features currently in the source.\n   *\n   * This method is not available when the source is configured with\n   * `useSpatialIndex` set to `false`.\n   * @param {import(\"../extent.js\").Extent} [extent] Destination extent. If provided, no new extent\n   *     will be created. Instead, that extent's coordinates will be overwritten.\n   * @return {import(\"../extent.js\").Extent} Extent.\n   * @api\n   */\n  getExtent(extent) {\n    return this.featuresRtree_.getExtent(extent);\n  }\n\n  /**\n   * Get a feature by its identifier (the value returned by feature.getId()).\n   * Note that the index treats string and numeric identifiers as the same.  So\n   * `source.getFeatureById(2)` will return a feature with id `'2'` or `2`.\n   *\n   * @param {string|number} id Feature identifier.\n   * @return {import(\"../Feature.js\").default<Geometry>|null} The feature (or `null` if not found).\n   * @api\n   */\n  getFeatureById(id) {\n    const feature = this.idIndex_[id.toString()];\n    return feature !== undefined ? feature : null;\n  }\n\n  /**\n   * Get a feature by its internal unique identifier (using `getUid`).\n   *\n   * @param {string} uid Feature identifier.\n   * @return {import(\"../Feature.js\").default<Geometry>|null} The feature (or `null` if not found).\n   */\n  getFeatureByUid(uid) {\n    const feature = this.uidIndex_[uid];\n    return feature !== undefined ? feature : null;\n  }\n\n  /**\n   * Get the format associated with this source.\n   *\n   * @return {import(\"../format/Feature.js\").default|undefined} The feature format.\n   * @api\n   */\n  getFormat() {\n    return this.format_;\n  }\n\n  /**\n   * @return {boolean} The source can have overlapping geometries.\n   */\n  getOverlaps() {\n    return this.overlaps_;\n  }\n\n  /**\n   * Get the url associated with this source.\n   *\n   * @return {string|import(\"../featureloader.js\").FeatureUrlFunction|undefined} The url.\n   * @api\n   */\n  getUrl() {\n    return this.url_;\n  }\n\n  /**\n   * @param {Event} event Event.\n   * @private\n   */\n  handleFeatureChange_(event) {\n    const feature = /** @type {import(\"../Feature.js\").default<Geometry>} */ (\n      event.target\n    );\n    const featureKey = getUid(feature);\n    const geometry = feature.getGeometry();\n    if (!geometry) {\n      if (!(featureKey in this.nullGeometryFeatures_)) {\n        if (this.featuresRtree_) {\n          this.featuresRtree_.remove(feature);\n        }\n        this.nullGeometryFeatures_[featureKey] = feature;\n      }\n    } else {\n      const extent = geometry.getExtent();\n      if (featureKey in this.nullGeometryFeatures_) {\n        delete this.nullGeometryFeatures_[featureKey];\n        if (this.featuresRtree_) {\n          this.featuresRtree_.insert(extent, feature);\n        }\n      } else {\n        if (this.featuresRtree_) {\n          this.featuresRtree_.update(extent, feature);\n        }\n      }\n    }\n    const id = feature.getId();\n    if (id !== undefined) {\n      const sid = id.toString();\n      if (this.idIndex_[sid] !== feature) {\n        this.removeFromIdIndex_(feature);\n        this.idIndex_[sid] = feature;\n      }\n    } else {\n      this.removeFromIdIndex_(feature);\n      this.uidIndex_[featureKey] = feature;\n    }\n    this.changed();\n    this.dispatchEvent(\n      new VectorSourceEvent(VectorEventType.CHANGEFEATURE, feature)\n    );\n  }\n\n  /**\n   * Returns true if the feature is contained within the source.\n   * @param {import(\"../Feature.js\").default<Geometry>} feature Feature.\n   * @return {boolean} Has feature.\n   * @api\n   */\n  hasFeature(feature) {\n    const id = feature.getId();\n    if (id !== undefined) {\n      return id in this.idIndex_;\n    }\n    return getUid(feature) in this.uidIndex_;\n  }\n\n  /**\n   * @return {boolean} Is empty.\n   */\n  isEmpty() {\n    if (this.featuresRtree_) {\n      return (\n        this.featuresRtree_.isEmpty() && isEmpty(this.nullGeometryFeatures_)\n      );\n    }\n    if (this.featuresCollection_) {\n      return this.featuresCollection_.getLength() === 0;\n    }\n    return true;\n  }\n\n  /**\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @param {number} resolution Resolution.\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   */\n  loadFeatures(extent, resolution, projection) {\n    const loadedExtentsRtree = this.loadedExtentsRtree_;\n    const extentsToLoad = this.strategy_(extent, resolution, projection);\n    for (let i = 0, ii = extentsToLoad.length; i < ii; ++i) {\n      const extentToLoad = extentsToLoad[i];\n      const alreadyLoaded = loadedExtentsRtree.forEachInExtent(\n        extentToLoad,\n        /**\n         * @param {{extent: import(\"../extent.js\").Extent}} object Object.\n         * @return {boolean} Contains.\n         */\n        function (object) {\n          return containsExtent(object.extent, extentToLoad);\n        }\n      );\n      if (!alreadyLoaded) {\n        ++this.loadingExtentsCount_;\n        this.dispatchEvent(\n          new VectorSourceEvent(VectorEventType.FEATURESLOADSTART)\n        );\n        this.loader_.call(\n          this,\n          extentToLoad,\n          resolution,\n          projection,\n          (features) => {\n            --this.loadingExtentsCount_;\n            this.dispatchEvent(\n              new VectorSourceEvent(\n                VectorEventType.FEATURESLOADEND,\n                undefined,\n                features\n              )\n            );\n          },\n          () => {\n            --this.loadingExtentsCount_;\n            this.dispatchEvent(\n              new VectorSourceEvent(VectorEventType.FEATURESLOADERROR)\n            );\n          }\n        );\n        loadedExtentsRtree.insert(extentToLoad, {extent: extentToLoad.slice()});\n      }\n    }\n    this.loading =\n      this.loader_.length < 4 ? false : this.loadingExtentsCount_ > 0;\n  }\n\n  refresh() {\n    this.clear(true);\n    this.loadedExtentsRtree_.clear();\n    super.refresh();\n  }\n\n  /**\n   * Remove an extent from the list of loaded extents.\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @api\n   */\n  removeLoadedExtent(extent) {\n    const loadedExtentsRtree = this.loadedExtentsRtree_;\n    let obj;\n    loadedExtentsRtree.forEachInExtent(extent, function (object) {\n      if (equals(object.extent, extent)) {\n        obj = object;\n        return true;\n      }\n    });\n    if (obj) {\n      loadedExtentsRtree.remove(obj);\n    }\n  }\n\n  /**\n   * Remove a single feature from the source.  If you want to remove all features\n   * at once, use the {@link module:ol/source/Vector~VectorSource#clear #clear()} method\n   * instead.\n   * @param {import(\"../Feature.js\").default<Geometry>} feature Feature to remove.\n   * @api\n   */\n  removeFeature(feature) {\n    if (!feature) {\n      return;\n    }\n    const featureKey = getUid(feature);\n    if (featureKey in this.nullGeometryFeatures_) {\n      delete this.nullGeometryFeatures_[featureKey];\n    } else {\n      if (this.featuresRtree_) {\n        this.featuresRtree_.remove(feature);\n      }\n    }\n    const result = this.removeFeatureInternal(feature);\n    if (result) {\n      this.changed();\n    }\n  }\n\n  /**\n   * Remove feature without firing a `change` event.\n   * @param {import(\"../Feature.js\").default<Geometry>} feature Feature.\n   * @return {import(\"../Feature.js\").default<Geometry>|undefined} The removed feature\n   *     (or undefined if the feature was not found).\n   * @protected\n   */\n  removeFeatureInternal(feature) {\n    const featureKey = getUid(feature);\n    const featureChangeKeys = this.featureChangeKeys_[featureKey];\n    if (!featureChangeKeys) {\n      return;\n    }\n    featureChangeKeys.forEach(unlistenByKey);\n    delete this.featureChangeKeys_[featureKey];\n    const id = feature.getId();\n    if (id !== undefined) {\n      delete this.idIndex_[id.toString()];\n    }\n    delete this.uidIndex_[featureKey];\n    this.dispatchEvent(\n      new VectorSourceEvent(VectorEventType.REMOVEFEATURE, feature)\n    );\n    return feature;\n  }\n\n  /**\n   * Remove a feature from the id index.  Called internally when the feature id\n   * may have changed.\n   * @param {import(\"../Feature.js\").default<Geometry>} feature The feature.\n   * @return {boolean} Removed the feature from the index.\n   * @private\n   */\n  removeFromIdIndex_(feature) {\n    let removed = false;\n    for (const id in this.idIndex_) {\n      if (this.idIndex_[id] === feature) {\n        delete this.idIndex_[id];\n        removed = true;\n        break;\n      }\n    }\n    return removed;\n  }\n\n  /**\n   * Set the new loader of the source. The next render cycle will use the\n   * new loader.\n   * @param {import(\"../featureloader.js\").FeatureLoader} loader The loader to set.\n   * @api\n   */\n  setLoader(loader) {\n    this.loader_ = loader;\n  }\n\n  /**\n   * Points the source to a new url. The next render cycle will use the new url.\n   * @param {string|import(\"../featureloader.js\").FeatureUrlFunction} url Url.\n   * @api\n   */\n  setUrl(url) {\n    assert(this.format_, 7); // `format` must be set when `url` is set\n    this.url_ = url;\n    this.setLoader(xhr(url, this.format_));\n  }\n}\n\nexport default VectorSource;\n","/**\n * @module ol/source/Cluster\n */\n\nimport EventType from '../events/EventType.js';\nimport Feature from '../Feature.js';\nimport Point from '../geom/Point.js';\nimport VectorSource from './Vector.js';\nimport {add as addCoordinate, scale as scaleCoordinate} from '../coordinate.js';\nimport {assert} from '../asserts.js';\nimport {\n  buffer,\n  createEmpty,\n  createOrUpdateFromCoordinate,\n  getCenter,\n} from '../extent.js';\nimport {getUid} from '../util.js';\n\n/**\n * @typedef {Object} Options\n * @property {import(\"./Source.js\").AttributionLike} [attributions] Attributions.\n * @property {number} [distance=20] Distance in pixels within which features will\n * be clustered together.\n * @property {number} [minDistance=0] Minimum distance in pixels between clusters.\n * Will be capped at the configured distance.\n * By default no minimum distance is guaranteed. This config can be used to avoid\n * overlapping icons. As a tradoff, the cluster feature's position will no longer be\n * the center of all its features.\n * @property {function(Feature):Point} [geometryFunction]\n * Function that takes an {@link module:ol/Feature~Feature} as argument and returns an\n * {@link module:ol/geom/Point~Point} as cluster calculation point for the feature. When a\n * feature should not be considered for clustering, the function should return\n * `null`. The default, which works when the underlying source contains point\n * features only, is\n * ```js\n * function(feature) {\n *   return feature.getGeometry();\n * }\n * ```\n * See {@link module:ol/geom/Polygon~Polygon#getInteriorPoint} for a way to get a cluster\n * calculation point for polygons.\n * @property {function(Point, Array<Feature>):Feature} [createCluster]\n * Function that takes the cluster's center {@link module:ol/geom/Point~Point} and an array\n * of {@link module:ol/Feature~Feature} included in this cluster. Must return a\n * {@link module:ol/Feature~Feature} that will be used to render. Default implementation is:\n * ```js\n * function(point, features) {\n *   return new Feature({\n *     geometry: point,\n *     features: features\n *   });\n * }\n * ```\n * @property {VectorSource} [source=null] Source.\n * @property {boolean} [wrapX=true] Whether to wrap the world horizontally.\n */\n\n/**\n * @classdesc\n * Layer source to cluster vector data. Works out of the box with point\n * geometries. For other geometry types, or if not all geometries should be\n * considered for clustering, a custom `geometryFunction` can be defined.\n *\n * If the instance is disposed without also disposing the underlying\n * source `setSource(null)` has to be called to remove the listener reference\n * from the wrapped source.\n * @api\n */\nclass Cluster extends VectorSource {\n  /**\n   * @param {Options} options Cluster options.\n   */\n  constructor(options) {\n    super({\n      attributions: options.attributions,\n      wrapX: options.wrapX,\n    });\n\n    /**\n     * @type {number|undefined}\n     * @protected\n     */\n    this.resolution = undefined;\n\n    /**\n     * @type {number}\n     * @protected\n     */\n    this.distance = options.distance !== undefined ? options.distance : 20;\n\n    /**\n     * @type {number}\n     * @protected\n     */\n    this.minDistance = options.minDistance || 0;\n\n    /**\n     * @type {number}\n     * @protected\n     */\n    this.interpolationRatio = 0;\n\n    /**\n     * @type {Array<Feature>}\n     * @protected\n     */\n    this.features = [];\n\n    /**\n     * @param {Feature} feature Feature.\n     * @return {Point} Cluster calculation point.\n     * @protected\n     */\n    this.geometryFunction =\n      options.geometryFunction ||\n      function (feature) {\n        const geometry = /** @type {Point} */ (feature.getGeometry());\n        assert(geometry.getType() == 'Point', 10); // The default `geometryFunction` can only handle `Point` geometries\n        return geometry;\n      };\n\n    /**\n     * @type {function(Point, Array<Feature>):Feature}\n     * @private\n     */\n    this.createCustomCluster_ = options.createCluster;\n\n    /**\n     * @type {VectorSource|null}\n     * @protected\n     */\n    this.source = null;\n\n    /**\n     * @private\n     */\n    this.boundRefresh_ = this.refresh.bind(this);\n\n    this.updateDistance(this.distance, this.minDistance);\n    this.setSource(options.source || null);\n  }\n\n  /**\n   * Remove all features from the source.\n   * @param {boolean} [fast] Skip dispatching of {@link module:ol/source/VectorEventType~VectorEventType#removefeature} events.\n   * @api\n   */\n  clear(fast) {\n    this.features.length = 0;\n    super.clear(fast);\n  }\n\n  /**\n   * Get the distance in pixels between clusters.\n   * @return {number} Distance.\n   * @api\n   */\n  getDistance() {\n    return this.distance;\n  }\n\n  /**\n   * Get a reference to the wrapped source.\n   * @return {VectorSource|null} Source.\n   * @api\n   */\n  getSource() {\n    return this.source;\n  }\n\n  /**\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @param {number} resolution Resolution.\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   */\n  loadFeatures(extent, resolution, projection) {\n    this.source.loadFeatures(extent, resolution, projection);\n    if (resolution !== this.resolution) {\n      this.resolution = resolution;\n      this.refresh();\n    }\n  }\n\n  /**\n   * Set the distance within which features will be clusterd together.\n   * @param {number} distance The distance in pixels.\n   * @api\n   */\n  setDistance(distance) {\n    this.updateDistance(distance, this.minDistance);\n  }\n\n  /**\n   * Set the minimum distance between clusters. Will be capped at the\n   * configured distance.\n   * @param {number} minDistance The minimum distance in pixels.\n   * @api\n   */\n  setMinDistance(minDistance) {\n    this.updateDistance(this.distance, minDistance);\n  }\n\n  /**\n   * The configured minimum distance between clusters.\n   * @return {number} The minimum distance in pixels.\n   * @api\n   */\n  getMinDistance() {\n    return this.minDistance;\n  }\n\n  /**\n   * Replace the wrapped source.\n   * @param {VectorSource|null} source The new source for this instance.\n   * @api\n   */\n  setSource(source) {\n    if (this.source) {\n      this.source.removeEventListener(EventType.CHANGE, this.boundRefresh_);\n    }\n    this.source = source;\n    if (source) {\n      source.addEventListener(EventType.CHANGE, this.boundRefresh_);\n    }\n    this.refresh();\n  }\n\n  /**\n   * Handle the source changing.\n   */\n  refresh() {\n    this.clear();\n    this.cluster();\n    this.addFeatures(this.features);\n  }\n\n  /**\n   * Update the distances and refresh the source if necessary.\n   * @param {number} distance The new distance.\n   * @param {number} minDistance The new minimum distance.\n   */\n  updateDistance(distance, minDistance) {\n    const ratio =\n      distance === 0 ? 0 : Math.min(minDistance, distance) / distance;\n    const changed =\n      distance !== this.distance || this.interpolationRatio !== ratio;\n    this.distance = distance;\n    this.minDistance = minDistance;\n    this.interpolationRatio = ratio;\n    if (changed) {\n      this.refresh();\n    }\n  }\n\n  /**\n   * @protected\n   */\n  cluster() {\n    if (this.resolution === undefined || !this.source) {\n      return;\n    }\n    const extent = createEmpty();\n    const mapDistance = this.distance * this.resolution;\n    const features = this.source.getFeatures();\n\n    /** @type {Object<string, true>} */\n    const clustered = {};\n\n    for (let i = 0, ii = features.length; i < ii; i++) {\n      const feature = features[i];\n      if (!(getUid(feature) in clustered)) {\n        const geometry = this.geometryFunction(feature);\n        if (geometry) {\n          const coordinates = geometry.getCoordinates();\n          createOrUpdateFromCoordinate(coordinates, extent);\n          buffer(extent, mapDistance, extent);\n\n          const neighbors = this.source\n            .getFeaturesInExtent(extent)\n            .filter(function (neighbor) {\n              const uid = getUid(neighbor);\n              if (uid in clustered) {\n                return false;\n              }\n              clustered[uid] = true;\n              return true;\n            });\n          this.features.push(this.createCluster(neighbors, extent));\n        }\n      }\n    }\n  }\n\n  /**\n   * @param {Array<Feature>} features Features\n   * @param {import(\"../extent.js\").Extent} extent The searched extent for these features.\n   * @return {Feature} The cluster feature.\n   * @protected\n   */\n  createCluster(features, extent) {\n    const centroid = [0, 0];\n    for (let i = features.length - 1; i >= 0; --i) {\n      const geometry = this.geometryFunction(features[i]);\n      if (geometry) {\n        addCoordinate(centroid, geometry.getCoordinates());\n      } else {\n        features.splice(i, 1);\n      }\n    }\n    scaleCoordinate(centroid, 1 / features.length);\n    const searchCenter = getCenter(extent);\n    const ratio = this.interpolationRatio;\n    const geometry = new Point([\n      centroid[0] * (1 - ratio) + searchCenter[0] * ratio,\n      centroid[1] * (1 - ratio) + searchCenter[1] * ratio,\n    ]);\n    if (this.createCustomCluster_) {\n      return this.createCustomCluster_(geometry, features);\n    }\n    return new Feature({\n      geometry,\n      features,\n    });\n  }\n}\n\nexport default Cluster;\n","/**\n * @module ol/reproj/DataTile\n */\nimport {ERROR_THRESHOLD} from './common.js';\n\nimport DataTile, {asArrayLike, asImageLike, toArray} from '../DataTile.js';\nimport EventType from '../events/EventType.js';\nimport TileState from '../TileState.js';\nimport Triangulation from './Triangulation.js';\nimport {\n  calculateSourceExtentResolution,\n  canvasPool,\n  render as renderReprojected,\n} from '../reproj.js';\nimport {clamp} from '../math.js';\nimport {createCanvasContext2D, releaseCanvas} from '../dom.js';\nimport {getArea, getIntersection} from '../extent.js';\nimport {listen, unlistenByKey} from '../events.js';\n\n/**\n * @typedef {function(number, number, number, number) : import(\"../DataTile.js\").default} TileGetter\n */\n\n/**\n * @typedef {Object} Options\n * @property {import(\"../proj/Projection.js\").default} sourceProj Source projection.\n * @property {import(\"../tilegrid/TileGrid.js\").default} sourceTileGrid Source tile grid.\n * @property {import(\"../proj/Projection.js\").default} targetProj Target projection.\n * @property {import(\"../tilegrid/TileGrid.js\").default} targetTileGrid Target tile grid.\n * @property {import(\"../tilecoord.js\").TileCoord} tileCoord Coordinate of the tile.\n * @property {import(\"../tilecoord.js\").TileCoord} [wrappedTileCoord] Coordinate of the tile wrapped in X.\n * @property {number} pixelRatio Pixel ratio.\n * @property {number} gutter Gutter of the source tiles.\n * @property {TileGetter} getTileFunction Function returning source tiles (z, x, y, pixelRatio).\n * @property {boolean} [interpolate=false] Use interpolated values when resampling.  By default,\n * the nearest neighbor is used when resampling.\n * @property {number} [errorThreshold] Acceptable reprojection error (in px).\n * @property {number} [transition=250] A duration for tile opacity\n * transitions in milliseconds. A duration of 0 disables the opacity transition.\n */\n\n/**\n * @classdesc\n * Class encapsulating single reprojected data tile.\n * See {@link module:ol/source/DataTile~DataTileSource}.\n *\n */\nclass ReprojDataTile extends DataTile {\n  /**\n   * @param {Options} options Tile options.\n   */\n  constructor(options) {\n    super({\n      tileCoord: options.tileCoord,\n      loader: () => Promise.resolve(new Uint8Array(4)),\n      interpolate: options.interpolate,\n      transition: options.transition,\n    });\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.pixelRatio_ = options.pixelRatio;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.gutter_ = options.gutter;\n\n    /**\n     * @type {import(\"../DataTile.js\").Data}\n     * @private\n     */\n    this.reprojData_ = null;\n\n    /**\n     * @type {Error}\n     * @private\n     */\n    this.reprojError_ = null;\n\n    /**\n     * @type {import('../size.js').Size}\n     * @private\n     */\n    this.reprojSize_ = undefined;\n\n    /**\n     * @private\n     * @type {import(\"../tilegrid/TileGrid.js\").default}\n     */\n    this.sourceTileGrid_ = options.sourceTileGrid;\n\n    /**\n     * @private\n     * @type {import(\"../tilegrid/TileGrid.js\").default}\n     */\n    this.targetTileGrid_ = options.targetTileGrid;\n\n    /**\n     * @private\n     * @type {import(\"../tilecoord.js\").TileCoord}\n     */\n    this.wrappedTileCoord_ = options.wrappedTileCoord || options.tileCoord;\n\n    /**\n     * @private\n     * @type {!Array<DataTile>}\n     */\n    this.sourceTiles_ = [];\n\n    /**\n     * @private\n     * @type {?Array<import(\"../events.js\").EventsKey>}\n     */\n    this.sourcesListenerKeys_ = null;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.sourceZ_ = 0;\n\n    const targetExtent = this.targetTileGrid_.getTileCoordExtent(\n      this.wrappedTileCoord_\n    );\n    const maxTargetExtent = this.targetTileGrid_.getExtent();\n    let maxSourceExtent = this.sourceTileGrid_.getExtent();\n\n    const limitedTargetExtent = maxTargetExtent\n      ? getIntersection(targetExtent, maxTargetExtent)\n      : targetExtent;\n\n    if (getArea(limitedTargetExtent) === 0) {\n      // Tile is completely outside range -> EMPTY\n      // TODO: is it actually correct that the source even creates the tile ?\n      this.state = TileState.EMPTY;\n      return;\n    }\n\n    const sourceProj = options.sourceProj;\n    const sourceProjExtent = sourceProj.getExtent();\n    if (sourceProjExtent) {\n      if (!maxSourceExtent) {\n        maxSourceExtent = sourceProjExtent;\n      } else {\n        maxSourceExtent = getIntersection(maxSourceExtent, sourceProjExtent);\n      }\n    }\n\n    const targetResolution = this.targetTileGrid_.getResolution(\n      this.wrappedTileCoord_[0]\n    );\n\n    const targetProj = options.targetProj;\n    const sourceResolution = calculateSourceExtentResolution(\n      sourceProj,\n      targetProj,\n      limitedTargetExtent,\n      targetResolution\n    );\n\n    if (!isFinite(sourceResolution) || sourceResolution <= 0) {\n      // invalid sourceResolution -> EMPTY\n      // probably edges of the projections when no extent is defined\n      this.state = TileState.EMPTY;\n      return;\n    }\n\n    const errorThresholdInPixels =\n      options.errorThreshold !== undefined\n        ? options.errorThreshold\n        : ERROR_THRESHOLD;\n\n    /**\n     * @private\n     * @type {!import(\"./Triangulation.js\").default}\n     */\n    this.triangulation_ = new Triangulation(\n      sourceProj,\n      targetProj,\n      limitedTargetExtent,\n      maxSourceExtent,\n      sourceResolution * errorThresholdInPixels,\n      targetResolution\n    );\n\n    if (this.triangulation_.getTriangles().length === 0) {\n      // no valid triangles -> EMPTY\n      this.state = TileState.EMPTY;\n      return;\n    }\n\n    this.sourceZ_ = this.sourceTileGrid_.getZForResolution(sourceResolution);\n    let sourceExtent = this.triangulation_.calculateSourceExtent();\n\n    if (maxSourceExtent) {\n      if (sourceProj.canWrapX()) {\n        sourceExtent[1] = clamp(\n          sourceExtent[1],\n          maxSourceExtent[1],\n          maxSourceExtent[3]\n        );\n        sourceExtent[3] = clamp(\n          sourceExtent[3],\n          maxSourceExtent[1],\n          maxSourceExtent[3]\n        );\n      } else {\n        sourceExtent = getIntersection(sourceExtent, maxSourceExtent);\n      }\n    }\n\n    if (!getArea(sourceExtent)) {\n      this.state = TileState.EMPTY;\n    } else {\n      const sourceRange = this.sourceTileGrid_.getTileRangeForExtentAndZ(\n        sourceExtent,\n        this.sourceZ_\n      );\n      const getTile = options.getTileFunction;\n      for (let srcX = sourceRange.minX; srcX <= sourceRange.maxX; srcX++) {\n        for (let srcY = sourceRange.minY; srcY <= sourceRange.maxY; srcY++) {\n          const tile = getTile(this.sourceZ_, srcX, srcY, this.pixelRatio_);\n          if (tile) {\n            this.sourceTiles_.push(tile);\n          }\n        }\n      }\n\n      if (this.sourceTiles_.length === 0) {\n        this.state = TileState.EMPTY;\n      }\n    }\n  }\n\n  /**\n   * Get the tile size.\n   * @return {import('../size.js').Size} Tile size.\n   */\n  getSize() {\n    return this.reprojSize_;\n  }\n\n  /**\n   * Get the data for the tile.\n   * @return {import(\"../DataTile.js\").Data} Tile data.\n   */\n  getData() {\n    return this.reprojData_;\n  }\n\n  /**\n   * Get any loading error.\n   * @return {Error} Loading error.\n   */\n  getError() {\n    return this.reprojError_;\n  }\n\n  /**\n   * @private\n   */\n  reproject_() {\n    const dataSources = [];\n    this.sourceTiles_.forEach((tile) => {\n      if (!tile || tile.getState() !== TileState.LOADED) {\n        return;\n      }\n      const size = tile.getSize();\n      const gutter = this.gutter_;\n      /**\n       * @type {import(\"../DataTile.js\").ArrayLike}\n       */\n      let tileData;\n      const arrayData = asArrayLike(tile.getData());\n      if (arrayData) {\n        tileData = arrayData;\n      } else {\n        tileData = toArray(asImageLike(tile.getData()));\n      }\n      const pixelSize = [size[0] + 2 * gutter, size[1] + 2 * gutter];\n      const isFloat = tileData instanceof Float32Array;\n      const pixelCount = pixelSize[0] * pixelSize[1];\n      const DataType = isFloat ? Float32Array : Uint8Array;\n      const tileDataR = new DataType(tileData.buffer);\n      const bytesPerElement = DataType.BYTES_PER_ELEMENT;\n      const bytesPerPixel = (bytesPerElement * tileDataR.length) / pixelCount;\n      const bytesPerRow = tileDataR.byteLength / pixelSize[1];\n      const bandCount = Math.floor(\n        bytesPerRow / bytesPerElement / pixelSize[0]\n      );\n      const packedLength = pixelCount * bandCount;\n      let packedData = tileDataR;\n      if (tileDataR.length !== packedLength) {\n        packedData = new DataType(packedLength);\n        let dataIndex = 0;\n        let rowOffset = 0;\n        const colCount = pixelSize[0] * bandCount;\n        for (let rowIndex = 0; rowIndex < pixelSize[1]; ++rowIndex) {\n          for (let colIndex = 0; colIndex < colCount; ++colIndex) {\n            packedData[dataIndex++] = tileDataR[rowOffset + colIndex];\n          }\n          rowOffset += bytesPerRow / bytesPerElement;\n        }\n      }\n      dataSources.push({\n        extent: this.sourceTileGrid_.getTileCoordExtent(tile.tileCoord),\n        data: new Uint8Array(packedData.buffer),\n        dataType: DataType,\n        bytesPerPixel: bytesPerPixel,\n        pixelSize: pixelSize,\n      });\n    });\n    this.sourceTiles_.length = 0;\n\n    if (dataSources.length === 0) {\n      this.state = TileState.ERROR;\n    } else {\n      const z = this.wrappedTileCoord_[0];\n      const size = this.targetTileGrid_.getTileSize(z);\n      const targetWidth = typeof size === 'number' ? size : size[0];\n      const targetHeight = typeof size === 'number' ? size : size[1];\n      const targetResolution = this.targetTileGrid_.getResolution(z);\n      const sourceResolution = this.sourceTileGrid_.getResolution(\n        this.sourceZ_\n      );\n\n      const targetExtent = this.targetTileGrid_.getTileCoordExtent(\n        this.wrappedTileCoord_\n      );\n\n      let dataR, dataU;\n\n      const bytesPerPixel = dataSources[0].bytesPerPixel;\n\n      const reprojs = Math.ceil(bytesPerPixel / 3);\n      for (let reproj = reprojs - 1; reproj >= 0; --reproj) {\n        const sources = [];\n        for (let i = 0, len = dataSources.length; i < len; ++i) {\n          const dataSource = dataSources[i];\n          const buffer = dataSource.data;\n          const pixelSize = dataSource.pixelSize;\n          const width = pixelSize[0];\n          const height = pixelSize[1];\n          const context = createCanvasContext2D(width, height, canvasPool);\n          const imageData = context.createImageData(width, height);\n          const data = imageData.data;\n          let offset = reproj * 3;\n          for (let j = 0, len = data.length; j < len; j += 4) {\n            data[j] = buffer[offset];\n            data[j + 1] = buffer[offset + 1];\n            data[j + 2] = buffer[offset + 2];\n            data[j + 3] = 255;\n            offset += bytesPerPixel;\n          }\n          context.putImageData(imageData, 0, 0);\n          sources.push({\n            extent: dataSource.extent,\n            image: context.canvas,\n          });\n        }\n\n        const canvas = renderReprojected(\n          targetWidth,\n          targetHeight,\n          this.pixelRatio_,\n          sourceResolution,\n          this.sourceTileGrid_.getExtent(),\n          targetResolution,\n          targetExtent,\n          this.triangulation_,\n          sources,\n          this.gutter_,\n          false,\n          false\n        );\n\n        for (let i = 0, len = sources.length; i < len; ++i) {\n          const canvas = sources[i].image;\n          const context = canvas.getContext('2d');\n          releaseCanvas(context);\n          canvasPool.push(context.canvas);\n        }\n\n        const context = canvas.getContext('2d');\n        const imageData = context.getImageData(\n          0,\n          0,\n          canvas.width,\n          canvas.height\n        );\n\n        releaseCanvas(context);\n        canvasPool.push(canvas);\n\n        if (!dataR) {\n          dataU = new Uint8Array(\n            bytesPerPixel * imageData.width * imageData.height\n          );\n          dataR = new dataSources[0].dataType(dataU.buffer);\n        }\n\n        const data = imageData.data;\n        let offset = reproj * 3;\n        for (let i = 0, len = data.length; i < len; i += 4) {\n          if (data[i + 3] === 255) {\n            dataU[offset] = data[i];\n            dataU[offset + 1] = data[i + 1];\n            dataU[offset + 2] = data[i + 2];\n          } else {\n            dataU[offset] = 0;\n            dataU[offset + 1] = 0;\n            dataU[offset + 2] = 0;\n          }\n          offset += bytesPerPixel;\n        }\n      }\n\n      this.reprojData_ = dataR;\n      this.reprojSize_ = [\n        Math.round(targetWidth * this.pixelRatio_),\n        Math.round(targetHeight * this.pixelRatio_),\n      ];\n      this.state = TileState.LOADED;\n    }\n    this.changed();\n  }\n\n  /**\n   * Load not yet loaded URI.\n   */\n  load() {\n    if (this.state !== TileState.IDLE && this.state !== TileState.ERROR) {\n      return;\n    }\n    this.state = TileState.LOADING;\n    this.changed();\n\n    let leftToLoad = 0;\n\n    this.sourcesListenerKeys_ = [];\n    this.sourceTiles_.forEach((tile) => {\n      const state = tile.getState();\n      if (state !== TileState.IDLE && state !== TileState.LOADING) {\n        return;\n      }\n      leftToLoad++;\n\n      const sourceListenKey = listen(\n        tile,\n        EventType.CHANGE,\n        function () {\n          const state = tile.getState();\n          if (\n            state == TileState.LOADED ||\n            state == TileState.ERROR ||\n            state == TileState.EMPTY\n          ) {\n            unlistenByKey(sourceListenKey);\n            leftToLoad--;\n            if (leftToLoad === 0) {\n              this.unlistenSources_();\n              this.reproject_();\n            }\n          }\n        },\n        this\n      );\n      this.sourcesListenerKeys_.push(sourceListenKey);\n    });\n\n    if (leftToLoad === 0) {\n      setTimeout(this.reproject_.bind(this), 0);\n    } else {\n      this.sourceTiles_.forEach(function (tile) {\n        const state = tile.getState();\n        if (state == TileState.IDLE) {\n          tile.load();\n        }\n      });\n    }\n  }\n\n  /**\n   * @private\n   */\n  unlistenSources_() {\n    this.sourcesListenerKeys_.forEach(unlistenByKey);\n    this.sourcesListenerKeys_ = null;\n  }\n}\n\nexport default ReprojDataTile;\n","/**\n * @module ol/source/DataTile\n */\nimport DataTile from '../DataTile.js';\nimport EventType from '../events/EventType.js';\nimport ReprojDataTile from '../reproj/DataTile.js';\nimport TileCache from '../TileCache.js';\nimport TileEventType from './TileEventType.js';\nimport TileSource, {TileSourceEvent} from './Tile.js';\nimport TileState from '../TileState.js';\nimport {\n  createXYZ,\n  extentFromProjection,\n  getForProjection as getTileGridForProjection,\n} from '../tilegrid.js';\nimport {equivalent, get as getProjection} from '../proj.js';\nimport {getKeyZXY} from '../tilecoord.js';\nimport {getUid} from '../util.js';\nimport {toPromise} from '../functions.js';\nimport {toSize} from '../size.js';\n\n/**\n * Data tile loading function.  The function is called with z, x, and y tile coordinates and\n * returns {@link import(\"../DataTile.js\").Data data} for a tile or a promise for the same.\n * @typedef {function(number, number, number) : (import(\"../DataTile.js\").Data|Promise<import(\"../DataTile.js\").Data>)} Loader\n */\n\n/**\n * @typedef {Object} Options\n * @property {Loader} [loader] Data loader.  Called with z, x, and y tile coordinates.\n * Returns {@link import(\"../DataTile.js\").Data data} for a tile or a promise for the same.\n * For loaders that generate images, the promise should not resolve until the image is loaded.\n * @property {import(\"./Source.js\").AttributionLike} [attributions] Attributions.\n * @property {boolean} [attributionsCollapsible=true] Attributions are collapsible.\n * @property {number} [maxZoom=42] Optional max zoom level. Not used if `tileGrid` is provided.\n * @property {number} [minZoom=0] Optional min zoom level. Not used if `tileGrid` is provided.\n * @property {number|import(\"../size.js\").Size} [tileSize=[256, 256]] The pixel width and height of the source tiles.\n * This may be different than the rendered pixel size if a `tileGrid` is provided.\n * @property {number} [gutter=0] The size in pixels of the gutter around data tiles to ignore.\n * This allows artifacts of rendering at tile edges to be ignored.\n * Supported data should be wider and taller than the tile size by a value of `2 x gutter`.\n * @property {number} [maxResolution] Optional tile grid resolution at level zero. Not used if `tileGrid` is provided.\n * @property {import(\"../proj.js\").ProjectionLike} [projection='EPSG:3857'] Tile projection.\n * @property {import(\"../tilegrid/TileGrid.js\").default} [tileGrid] Tile grid.\n * @property {boolean} [opaque=false] Whether the layer is opaque.\n * @property {import(\"./Source.js\").State} [state] The source state.\n * @property {boolean} [wrapX=false] Render tiles beyond the antimeridian.\n * @property {number} [transition] Transition time when fading in new tiles (in milliseconds).\n * @property {number} [bandCount=4] Number of bands represented in the data.\n * @property {boolean} [interpolate=false] Use interpolated values when resampling.  By default,\n * the nearest neighbor is used when resampling.\n */\n\n/**\n * @classdesc\n * A source for typed array data tiles.\n *\n * @fires import(\"./Tile.js\").TileSourceEvent\n * @api\n */\nclass DataTileSource extends TileSource {\n  /**\n   * @param {Options} options DataTile source options.\n   */\n  constructor(options) {\n    const projection =\n      options.projection === undefined ? 'EPSG:3857' : options.projection;\n\n    let tileGrid = options.tileGrid;\n    if (tileGrid === undefined && projection) {\n      tileGrid = createXYZ({\n        extent: extentFromProjection(projection),\n        maxResolution: options.maxResolution,\n        maxZoom: options.maxZoom,\n        minZoom: options.minZoom,\n        tileSize: options.tileSize,\n      });\n    }\n\n    super({\n      cacheSize: 0.1, // don't cache on the source\n      attributions: options.attributions,\n      attributionsCollapsible: options.attributionsCollapsible,\n      projection: projection,\n      tileGrid: tileGrid,\n      opaque: options.opaque,\n      state: options.state,\n      wrapX: options.wrapX,\n      transition: options.transition,\n      interpolate: options.interpolate,\n    });\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.gutter_ = options.gutter !== undefined ? options.gutter : 0;\n\n    /**\n     * @private\n     * @type {import('../size.js').Size|null}\n     */\n    this.tileSize_ = options.tileSize ? toSize(options.tileSize) : null;\n\n    /**\n     * @private\n     * @type {Array<import('../size.js').Size>|null}\n     */\n    this.tileSizes_ = null;\n\n    /**\n     * @private\n     * @type {!Object<string, boolean>}\n     */\n    this.tileLoadingKeys_ = {};\n\n    /**\n     * @private\n     */\n    this.loader_ = options.loader;\n\n    this.handleTileChange_ = this.handleTileChange_.bind(this);\n\n    /**\n     * @type {number}\n     */\n    this.bandCount = options.bandCount === undefined ? 4 : options.bandCount; // assume RGBA if undefined\n\n    /**\n     * @private\n     * @type {!Object<string, import(\"../tilegrid/TileGrid.js\").default>}\n     */\n    this.tileGridForProjection_ = {};\n\n    /**\n     * @private\n     * @type {!Object<string, import(\"../TileCache.js\").default>}\n     */\n    this.tileCacheForProjection_ = {};\n  }\n\n  /**\n   * Set the source tile sizes.  The length of the array is expected to match the number of\n   * levels in the tile grid.\n   * @protected\n   * @param {Array<import('../size.js').Size>} tileSizes An array of tile sizes.\n   */\n  setTileSizes(tileSizes) {\n    this.tileSizes_ = tileSizes;\n  }\n\n  /**\n   * Get the source tile size at the given zoom level.  This may be different than the rendered tile\n   * size.\n   * @protected\n   * @param {number} z Tile zoom level.\n   * @return {import('../size.js').Size} The source tile size.\n   */\n  getTileSize(z) {\n    if (this.tileSizes_) {\n      return this.tileSizes_[z];\n    }\n    if (this.tileSize_) {\n      return this.tileSize_;\n    }\n    const tileGrid = this.getTileGrid();\n    return tileGrid ? toSize(tileGrid.getTileSize(z)) : [256, 256];\n  }\n\n  /**\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   * @return {number} Gutter.\n   */\n  getGutterForProjection(projection) {\n    const thisProj = this.getProjection();\n    if (!thisProj || equivalent(thisProj, projection)) {\n      return this.gutter_;\n    }\n\n    return 0;\n  }\n\n  /**\n   * @param {Loader} loader The data loader.\n   * @protected\n   */\n  setLoader(loader) {\n    this.loader_ = loader;\n  }\n\n  /**\n   * @param {number} z Tile coordinate z.\n   * @param {number} x Tile coordinate x.\n   * @param {number} y Tile coordinate y.\n   * @param {import(\"../proj/Projection.js\").default} targetProj The output projection.\n   * @param {import(\"../proj/Projection.js\").default} sourceProj The input projection.\n   * @return {!DataTile} Tile.\n   */\n  getReprojTile_(z, x, y, targetProj, sourceProj) {\n    const cache = this.getTileCacheForProjection(targetProj);\n    const tileCoordKey = getKeyZXY(z, x, y);\n    if (cache.containsKey(tileCoordKey)) {\n      const tile = cache.get(tileCoordKey);\n      if (tile && tile.key == this.getKey()) {\n        return tile;\n      }\n    }\n\n    const tileGrid = this.getTileGrid();\n    const reprojTilePixelRatio = Math.max.apply(\n      null,\n      tileGrid.getResolutions().map((r, z) => {\n        const tileSize = toSize(tileGrid.getTileSize(z));\n        const textureSize = this.getTileSize(z);\n        return Math.max(\n          textureSize[0] / tileSize[0],\n          textureSize[1] / tileSize[1]\n        );\n      })\n    );\n\n    const sourceTileGrid = this.getTileGridForProjection(sourceProj);\n    const targetTileGrid = this.getTileGridForProjection(targetProj);\n    const tileCoord = [z, x, y];\n    const wrappedTileCoord = this.getTileCoordForTileUrlFunction(\n      tileCoord,\n      targetProj\n    );\n\n    const options = Object.assign(\n      {\n        sourceProj,\n        sourceTileGrid,\n        targetProj,\n        targetTileGrid,\n        tileCoord,\n        wrappedTileCoord,\n        pixelRatio: reprojTilePixelRatio,\n        gutter: this.getGutterForProjection(sourceProj),\n        getTileFunction: (z, x, y, pixelRatio) =>\n          this.getTile(z, x, y, pixelRatio, sourceProj),\n      },\n      this.tileOptions\n    );\n    const newTile = new ReprojDataTile(options);\n    newTile.key = this.getKey();\n    return newTile;\n  }\n\n  /**\n   * @param {number} z Tile coordinate z.\n   * @param {number} x Tile coordinate x.\n   * @param {number} y Tile coordinate y.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   * @return {!DataTile} Tile.\n   */\n  getTile(z, x, y, pixelRatio, projection) {\n    const sourceProjection = this.getProjection();\n    if (\n      sourceProjection &&\n      projection &&\n      !equivalent(sourceProjection, projection)\n    ) {\n      return this.getReprojTile_(z, x, y, projection, sourceProjection);\n    }\n\n    const size = this.getTileSize(z);\n    const tileCoordKey = getKeyZXY(z, x, y);\n    if (this.tileCache.containsKey(tileCoordKey)) {\n      return this.tileCache.get(tileCoordKey);\n    }\n\n    const sourceLoader = this.loader_;\n\n    function loader() {\n      return toPromise(function () {\n        return sourceLoader(z, x, y);\n      });\n    }\n\n    const options = Object.assign(\n      {\n        tileCoord: [z, x, y],\n        loader: loader,\n        size: size,\n      },\n      this.tileOptions\n    );\n\n    const tile = new DataTile(options);\n    tile.key = this.getKey();\n    tile.addEventListener(EventType.CHANGE, this.handleTileChange_);\n\n    this.tileCache.set(tileCoordKey, tile);\n    return tile;\n  }\n\n  /**\n   * Handle tile change events.\n   * @param {import(\"../events/Event.js\").default} event Event.\n   */\n  handleTileChange_(event) {\n    const tile = /** @type {import(\"../Tile.js\").default} */ (event.target);\n    const uid = getUid(tile);\n    const tileState = tile.getState();\n    let type;\n    if (tileState == TileState.LOADING) {\n      this.tileLoadingKeys_[uid] = true;\n      type = TileEventType.TILELOADSTART;\n    } else if (uid in this.tileLoadingKeys_) {\n      delete this.tileLoadingKeys_[uid];\n      type =\n        tileState == TileState.ERROR\n          ? TileEventType.TILELOADERROR\n          : tileState == TileState.LOADED\n          ? TileEventType.TILELOADEND\n          : undefined;\n    }\n    if (type) {\n      this.dispatchEvent(new TileSourceEvent(type, tile));\n    }\n  }\n\n  /**\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   * @return {!import(\"../tilegrid/TileGrid.js\").default} Tile grid.\n   */\n  getTileGridForProjection(projection) {\n    const thisProj = this.getProjection();\n    if (this.tileGrid && (!thisProj || equivalent(thisProj, projection))) {\n      return this.tileGrid;\n    }\n\n    const projKey = getUid(projection);\n    if (!(projKey in this.tileGridForProjection_)) {\n      this.tileGridForProjection_[projKey] =\n        getTileGridForProjection(projection);\n    }\n    return this.tileGridForProjection_[projKey];\n  }\n\n  /**\n   * Sets the tile grid to use when reprojecting the tiles to the given\n   * projection instead of the default tile grid for the projection.\n   *\n   * This can be useful when the default tile grid cannot be created\n   * (e.g. projection has no extent defined) or\n   * for optimization reasons (custom tile size, resolutions, ...).\n   *\n   * @param {import(\"../proj.js\").ProjectionLike} projection Projection.\n   * @param {import(\"../tilegrid/TileGrid.js\").default} tilegrid Tile grid to use for the projection.\n   * @api\n   */\n  setTileGridForProjection(projection, tilegrid) {\n    const proj = getProjection(projection);\n    if (proj) {\n      const projKey = getUid(proj);\n      if (!(projKey in this.tileGridForProjection_)) {\n        this.tileGridForProjection_[projKey] = tilegrid;\n      }\n    }\n  }\n\n  /**\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   * @return {import(\"../TileCache.js\").default} Tile cache.\n   */\n  getTileCacheForProjection(projection) {\n    const thisProj = this.getProjection();\n    if (!thisProj || equivalent(thisProj, projection)) {\n      return this.tileCache;\n    }\n\n    const projKey = getUid(projection);\n    if (!(projKey in this.tileCacheForProjection_)) {\n      this.tileCacheForProjection_[projKey] = new TileCache(0.1); // don't cache\n    }\n    return this.tileCacheForProjection_[projKey];\n  }\n\n  /**\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   * @param {!Object<string, boolean>} usedTiles Used tiles.\n   */\n  expireCache(projection, usedTiles) {\n    const usedTileCache = this.getTileCacheForProjection(projection);\n\n    this.tileCache.expireCache(\n      this.tileCache == usedTileCache ? usedTiles : {}\n    );\n    for (const id in this.tileCacheForProjection_) {\n      const tileCache = this.tileCacheForProjection_[id];\n      tileCache.expireCache(tileCache == usedTileCache ? usedTiles : {});\n    }\n  }\n\n  clear() {\n    super.clear();\n    for (const id in this.tileCacheForProjection_) {\n      this.tileCacheForProjection_[id].clear();\n    }\n  }\n}\n\nexport default DataTileSource;\n","/**\n * @module ol/source/GeoTIFF\n */\nimport DataTile from './DataTile.js';\nimport TileGrid from '../tilegrid/TileGrid.js';\nimport {\n  Pool,\n  globals as geotiffGlobals,\n  fromBlob as tiffFromBlob,\n  fromUrl as tiffFromUrl,\n  fromUrls as tiffFromUrls,\n} from 'geotiff';\nimport {\n  Projection,\n  get as getCachedProjection,\n  toUserCoordinate,\n  toUserExtent,\n} from '../proj.js';\nimport {clamp} from '../math.js';\nimport {getCenter, getIntersection} from '../extent.js';\nimport {error as logError} from '../console.js';\nimport {fromCode as unitsFromCode} from '../proj/Units.js';\n\n/**\n * Determine if an image type is a mask.\n * See https://www.awaresystems.be/imaging/tiff/tifftags/newsubfiletype.html\n * @param {GeoTIFFImage} image The image.\n * @return {boolean} The image is a mask.\n */\nfunction isMask(image) {\n  const fileDirectory = image.fileDirectory;\n  const type = fileDirectory.NewSubfileType || 0;\n  return (type & 4) === 4;\n}\n\n/**\n * @param {true|false|'auto'} preference The convertToRGB option.\n * @param {GeoTIFFImage} image The image.\n * @return {boolean} Use the `image.readRGB()` method.\n */\nfunction readRGB(preference, image) {\n  if (!preference) {\n    return false;\n  }\n  if (preference === true) {\n    return true;\n  }\n  if (image.getSamplesPerPixel() !== 3) {\n    return false;\n  }\n  const interpretation = image.fileDirectory.PhotometricInterpretation;\n  const interpretations = geotiffGlobals.photometricInterpretations;\n  return (\n    interpretation === interpretations.CMYK ||\n    interpretation === interpretations.YCbCr ||\n    interpretation === interpretations.CIELab ||\n    interpretation === interpretations.ICCLab\n  );\n}\n\n/**\n * @typedef {Object} SourceInfo\n * @property {string} [url] URL for the source GeoTIFF.\n * @property {Array<string>} [overviews] List of any overview URLs, only applies if the url parameter is given.\n * @property {Blob} [blob] Blob containing the source GeoTIFF. `blob` and `url` are mutually exclusive.\n * @property {number} [min=0] The minimum source data value.  Rendered values are scaled from 0 to 1 based on\n * the configured min and max.  If not provided and raster statistics are available, those will be used instead.\n * If neither are available, the minimum for the data type will be used.  To disable this behavior, set\n * the `normalize` option to `false` in the constructor.\n * @property {number} [max] The maximum source data value.  Rendered values are scaled from 0 to 1 based on\n * the configured min and max.  If not provided and raster statistics are available, those will be used instead.\n * If neither are available, the maximum for the data type will be used.  To disable this behavior, set\n * the `normalize` option to `false` in the constructor.\n * @property {number} [nodata] Values to discard (overriding any nodata values in the metadata).\n * When provided, an additional alpha band will be added to the data.  Often the GeoTIFF metadata\n * will include information about nodata values, so you should only need to set this property if\n * you find that it is not already extracted from the metadata.\n * @property {Array<number>} [bands] Band numbers to be read from (where the first band is `1`). If not provided, all bands will\n * be read. For example, if a GeoTIFF has blue (1), green (2), red (3), and near-infrared (4) bands, and you only need the\n * near-infrared band, configure `bands: [4]`.\n */\n\n/**\n * @typedef {Object} GeoKeys\n * @property {number} GTModelTypeGeoKey Model type.\n * @property {number} GTRasterTypeGeoKey Raster type.\n * @property {number} GeogAngularUnitsGeoKey Angular units.\n * @property {number} GeogInvFlatteningGeoKey Inverse flattening.\n * @property {number} GeogSemiMajorAxisGeoKey Semi-major axis.\n * @property {number} GeographicTypeGeoKey Geographic coordinate system code.\n * @property {number} ProjLinearUnitsGeoKey Projected linear unit code.\n * @property {number} ProjectedCSTypeGeoKey Projected coordinate system code.\n */\n\n/**\n * @typedef {import(\"geotiff\").GeoTIFF} GeoTIFF\n */\n\n/**\n * @typedef {import(\"geotiff\").MultiGeoTIFF} MultiGeoTIFF\n */\n\n/**\n * @typedef {Object} GDALMetadata\n * @property {string} STATISTICS_MINIMUM The minimum value (as a string).\n * @property {string} STATISTICS_MAXIMUM The maximum value (as a string).\n */\n\nconst STATISTICS_MAXIMUM = 'STATISTICS_MAXIMUM';\nconst STATISTICS_MINIMUM = 'STATISTICS_MINIMUM';\n\nconst defaultTileSize = 256;\n\n/**\n * @typedef {import(\"geotiff\").GeoTIFFImage} GeoTIFFImage\n */\n\nlet workerPool;\nfunction getWorkerPool() {\n  if (!workerPool) {\n    workerPool = new Pool();\n  }\n  return workerPool;\n}\n\n/**\n * Get the bounding box of an image.  If the image does not have an affine transform,\n * the pixel bounds are returned.\n * @param {GeoTIFFImage} image The image.\n * @return {Array<number>} The image bounding box.\n */\nfunction getBoundingBox(image) {\n  try {\n    return image.getBoundingBox();\n  } catch (_) {\n    return [0, 0, image.getWidth(), image.getHeight()];\n  }\n}\n\n/**\n * Get the origin of an image.  If the image does not have an affine transform,\n * the top-left corner of the pixel bounds is returned.\n * @param {GeoTIFFImage} image The image.\n * @return {Array<number>} The image origin.\n */\nfunction getOrigin(image) {\n  try {\n    return image.getOrigin().slice(0, 2);\n  } catch (_) {\n    return [0, image.getHeight()];\n  }\n}\n\n/**\n * Get the resolution of an image.  If the image does not have an affine transform,\n * the width of the image is compared with the reference image.\n * @param {GeoTIFFImage} image The image.\n * @param {GeoTIFFImage} referenceImage The reference image.\n * @return {Array<number>} The map x and y units per pixel.\n */\nfunction getResolutions(image, referenceImage) {\n  try {\n    return image.getResolution(referenceImage);\n  } catch (_) {\n    return [\n      referenceImage.getWidth() / image.getWidth(),\n      referenceImage.getHeight() / image.getHeight(),\n    ];\n  }\n}\n\n/**\n * @param {GeoTIFFImage} image A GeoTIFF.\n * @return {import(\"../proj/Projection.js\").default} The image projection.\n */\nfunction getProjection(image) {\n  const geoKeys = image.geoKeys;\n  if (!geoKeys) {\n    return null;\n  }\n\n  if (\n    geoKeys.ProjectedCSTypeGeoKey &&\n    geoKeys.ProjectedCSTypeGeoKey !== 32767\n  ) {\n    const code = 'EPSG:' + geoKeys.ProjectedCSTypeGeoKey;\n    let projection = getCachedProjection(code);\n    if (!projection) {\n      const units = unitsFromCode(geoKeys.ProjLinearUnitsGeoKey);\n      if (units) {\n        projection = new Projection({\n          code: code,\n          units: units,\n        });\n      }\n    }\n    return projection;\n  }\n\n  if (geoKeys.GeographicTypeGeoKey && geoKeys.GeographicTypeGeoKey !== 32767) {\n    const code = 'EPSG:' + geoKeys.GeographicTypeGeoKey;\n    let projection = getCachedProjection(code);\n    if (!projection) {\n      const units = unitsFromCode(geoKeys.GeogAngularUnitsGeoKey);\n      if (units) {\n        projection = new Projection({\n          code: code,\n          units: units,\n        });\n      }\n    }\n    return projection;\n  }\n\n  return null;\n}\n\n/**\n * @param {GeoTIFF|MultiGeoTIFF} tiff A GeoTIFF.\n * @return {Promise<Array<GeoTIFFImage>>} Resolves to a list of images.\n */\nfunction getImagesForTIFF(tiff) {\n  return tiff.getImageCount().then(function (count) {\n    const requests = new Array(count);\n    for (let i = 0; i < count; ++i) {\n      requests[i] = tiff.getImage(i);\n    }\n    return Promise.all(requests);\n  });\n}\n\n/**\n * @param {SourceInfo} source The GeoTIFF source.\n * @param {Object} options Options for the GeoTIFF source.\n * @return {Promise<Array<GeoTIFFImage>>} Resolves to a list of images.\n */\nfunction getImagesForSource(source, options) {\n  let request;\n  if (source.blob) {\n    request = tiffFromBlob(source.blob);\n  } else if (source.overviews) {\n    request = tiffFromUrls(source.url, source.overviews, options);\n  } else {\n    request = tiffFromUrl(source.url, options);\n  }\n  return request.then(getImagesForTIFF);\n}\n\n/**\n * @param {number|Array<number>|Array<Array<number>>} expected Expected value.\n * @param {number|Array<number>|Array<Array<number>>} got Actual value.\n * @param {number} tolerance Accepted tolerance in fraction of expected between expected and got.\n * @param {string} message The error message.\n * @param {function(Error):void} rejector A function to be called with any error.\n */\nfunction assertEqual(expected, got, tolerance, message, rejector) {\n  if (Array.isArray(expected)) {\n    const length = expected.length;\n    if (!Array.isArray(got) || length != got.length) {\n      const error = new Error(message);\n      rejector(error);\n      throw error;\n    }\n    for (let i = 0; i < length; ++i) {\n      assertEqual(expected[i], got[i], tolerance, message, rejector);\n    }\n    return;\n  }\n\n  got = /** @type {number} */ (got);\n  if (Math.abs(expected - got) > tolerance * expected) {\n    throw new Error(message);\n  }\n}\n\n/**\n * @param {Array} array The data array.\n * @return {number} The minimum value.\n */\nfunction getMinForDataType(array) {\n  if (array instanceof Int8Array) {\n    return -128;\n  }\n  if (array instanceof Int16Array) {\n    return -32768;\n  }\n  if (array instanceof Int32Array) {\n    return -2147483648;\n  }\n  if (array instanceof Float32Array) {\n    return 1.2e-38;\n  }\n  return 0;\n}\n\n/**\n * @param {Array} array The data array.\n * @return {number} The maximum value.\n */\nfunction getMaxForDataType(array) {\n  if (array instanceof Int8Array) {\n    return 127;\n  }\n  if (array instanceof Uint8Array) {\n    return 255;\n  }\n  if (array instanceof Uint8ClampedArray) {\n    return 255;\n  }\n  if (array instanceof Int16Array) {\n    return 32767;\n  }\n  if (array instanceof Uint16Array) {\n    return 65535;\n  }\n  if (array instanceof Int32Array) {\n    return 2147483647;\n  }\n  if (array instanceof Uint32Array) {\n    return 4294967295;\n  }\n  if (array instanceof Float32Array) {\n    return 3.4e38;\n  }\n  return 255;\n}\n\n/**\n * @typedef {Object} GeoTIFFSourceOptions\n * @property {boolean} [forceXHR=false] Whether to force the usage of the browsers XMLHttpRequest API.\n * @property {Object<string, string>} [headers] additional key-value pairs of headers to be passed with each request. Key is the header name, value the header value.\n * @property {string} [credentials] How credentials shall be handled. See\n * https://developer.mozilla.org/en-US/docs/Web/API/fetch for reference and possible values\n * @property {number} [maxRanges] The maximum amount of ranges to request in a single multi-range request.\n * By default only a single range is used.\n * @property {boolean} [allowFullFile=false] Whether or not a full file is accepted when only a portion is\n * requested. Only use this when you know the source image to be small enough to fit in memory.\n * @property {number} [blockSize=65536] The block size to use.\n * @property {number} [cacheSize=100] The number of blocks that shall be held in a LRU cache.\n */\n\n/**\n * @typedef {Object} Options\n * @property {Array<SourceInfo>} sources List of information about GeoTIFF sources.\n * Multiple sources can be combined when their resolution sets are equal after applying a scale.\n * The list of sources defines a mapping between input bands as they are read from each GeoTIFF and\n * the output bands that are provided by data tiles. To control which bands to read from each GeoTIFF,\n * use the {@link import(\"./GeoTIFF.js\").SourceInfo bands} property. If, for example, you specify two\n * sources, one with 3 bands and {@link import(\"./GeoTIFF.js\").SourceInfo nodata} configured, and\n * another with 1 band, the resulting data tiles will have 5 bands: 3 from the first source, 1 alpha\n * band from the first source, and 1 band from the second source.\n * @property {GeoTIFFSourceOptions} [sourceOptions] Additional options to be passed to [geotiff.js](https://geotiffjs.github.io/geotiff.js/module-geotiff.html)'s `fromUrl` or `fromUrls` methods.\n * @property {true|false|'auto'} [convertToRGB=false] By default, bands from the sources are read as-is. When\n * reading GeoTIFFs with the purpose of displaying them as RGB images, setting this to `true` will\n * convert other color spaces (YCbCr, CMYK) to RGB.  Setting the option to `'auto'` will make it so CMYK, YCbCr,\n * CIELab, and ICCLab images will automatically be converted to RGB.\n * @property {boolean} [normalize=true] By default, the source data is normalized to values between\n * 0 and 1 with scaling factors based on the raster statistics or `min` and `max` properties of each source.\n * If instead you want to work with the raw values in a style expression, set this to `false`.  Setting this option\n * to `false` will make it so any `min` and `max` properties on sources are ignored.\n * @property {boolean} [opaque=false] Whether the layer is opaque.\n * @property {number} [transition=250] Duration of the opacity transition for rendering.\n * To disable the opacity transition, pass `transition: 0`.\n * @property {boolean} [wrapX=false] Render tiles beyond the tile grid extent.\n * @property {boolean} [interpolate=true] Use interpolated values when resampling.  By default,\n * the linear interpolation is used to resample the data.  If false, nearest neighbor is used.\n */\n\n/**\n * @classdesc\n * A source for working with GeoTIFF data.\n * **Note for users of the full build**: The `GeoTIFF` source requires the\n * [geotiff.js](https://github.com/geotiffjs/geotiff.js) library to be loaded as well.\n *\n * @api\n */\nclass GeoTIFFSource extends DataTile {\n  /**\n   * @param {Options} options Data tile options.\n   */\n  constructor(options) {\n    super({\n      state: 'loading',\n      tileGrid: null,\n      projection: null,\n      opaque: options.opaque,\n      transition: options.transition,\n      interpolate: options.interpolate !== false,\n      wrapX: options.wrapX,\n    });\n\n    /**\n     * @type {Array<SourceInfo>}\n     * @private\n     */\n    this.sourceInfo_ = options.sources;\n\n    const numSources = this.sourceInfo_.length;\n\n    /**\n     * @type {Object}\n     * @private\n     */\n    this.sourceOptions_ = options.sourceOptions;\n\n    /**\n     * @type {Array<Array<GeoTIFFImage>>}\n     * @private\n     */\n    this.sourceImagery_ = new Array(numSources);\n\n    /**\n     * @type {Array<Array<GeoTIFFImage>>}\n     * @private\n     */\n    this.sourceMasks_ = new Array(numSources);\n\n    /**\n     * @type {Array<number>}\n     * @private\n     */\n    this.resolutionFactors_ = new Array(numSources);\n\n    /**\n     * @type {Array<number>}\n     * @private\n     */\n    this.samplesPerPixel_;\n\n    /**\n     * @type {Array<Array<number>>}\n     * @private\n     */\n    this.nodataValues_;\n\n    /**\n     * @type {Array<Array<GDALMetadata>>}\n     * @private\n     */\n    this.metadata_;\n\n    /**\n     * @type {boolean}\n     * @private\n     */\n    this.normalize_ = options.normalize !== false;\n\n    /**\n     * @type {boolean}\n     * @private\n     */\n    this.addAlpha_ = false;\n\n    /**\n     * @type {Error}\n     * @private\n     */\n    this.error_ = null;\n\n    /**\n     * @type {true|false|'auto'}\n     */\n    this.convertToRGB_ = options.convertToRGB || false;\n\n    this.setKey(this.sourceInfo_.map((source) => source.url).join(','));\n\n    const self = this;\n    const requests = new Array(numSources);\n    for (let i = 0; i < numSources; ++i) {\n      requests[i] = getImagesForSource(\n        this.sourceInfo_[i],\n        this.sourceOptions_\n      );\n    }\n    Promise.all(requests)\n      .then(function (sources) {\n        self.configure_(sources);\n      })\n      .catch(function (error) {\n        logError(error);\n        self.error_ = error;\n        self.setState('error');\n      });\n  }\n\n  /**\n   * @return {Error} A source loading error. When the source state is `error`, use this function\n   * to get more information about the error. To debug a faulty configuration, you may want to use\n   * a listener like\n   * ```js\n   * geotiffSource.on('change', () => {\n   *   if (geotiffSource.getState() === 'error') {\n   *     console.error(geotiffSource.getError());\n   *   }\n   * });\n   * ```\n   */\n  getError() {\n    return this.error_;\n  }\n\n  /**\n   * Determine the projection of the images in this GeoTIFF.\n   * The default implementation looks at the ProjectedCSTypeGeoKey and the GeographicTypeGeoKey\n   * of each image in turn.\n   * You can override this method in a subclass to support more projections.\n   *\n   * @param {Array<Array<GeoTIFFImage>>} sources Each source is a list of images\n   * from a single GeoTIFF.\n   */\n  determineProjection(sources) {\n    const firstSource = sources[0];\n    for (let i = firstSource.length - 1; i >= 0; --i) {\n      const image = firstSource[i];\n      const projection = getProjection(image);\n      if (projection) {\n        this.projection = projection;\n        break;\n      }\n    }\n  }\n\n  /**\n   * Configure the tile grid based on images within the source GeoTIFFs.  Each GeoTIFF\n   * must have the same internal tiled structure.\n   * @param {Array<Array<GeoTIFFImage>>} sources Each source is a list of images\n   * from a single GeoTIFF.\n   * @private\n   */\n  configure_(sources) {\n    let extent;\n    let origin;\n    let commonRenderTileSizes;\n    let commonSourceTileSizes;\n    let resolutions;\n    const samplesPerPixel = new Array(sources.length);\n    const nodataValues = new Array(sources.length);\n    const metadata = new Array(sources.length);\n    let minZoom = 0;\n\n    const sourceCount = sources.length;\n    for (let sourceIndex = 0; sourceIndex < sourceCount; ++sourceIndex) {\n      const images = [];\n      const masks = [];\n      sources[sourceIndex].forEach((item) => {\n        if (isMask(item)) {\n          masks.push(item);\n        } else {\n          images.push(item);\n        }\n      });\n\n      const imageCount = images.length;\n      if (masks.length > 0 && masks.length !== imageCount) {\n        throw new Error(\n          `Expected one mask per image found ${masks.length} masks and ${imageCount} images`\n        );\n      }\n\n      let sourceExtent;\n      let sourceOrigin;\n      const sourceTileSizes = new Array(imageCount);\n      const renderTileSizes = new Array(imageCount);\n      const sourceResolutions = new Array(imageCount);\n\n      nodataValues[sourceIndex] = new Array(imageCount);\n      metadata[sourceIndex] = new Array(imageCount);\n\n      for (let imageIndex = 0; imageIndex < imageCount; ++imageIndex) {\n        const image = images[imageIndex];\n        const nodataValue = image.getGDALNoData();\n        metadata[sourceIndex][imageIndex] = image.getGDALMetadata(0);\n        nodataValues[sourceIndex][imageIndex] = nodataValue;\n\n        const wantedSamples = this.sourceInfo_[sourceIndex].bands;\n        samplesPerPixel[sourceIndex] = wantedSamples\n          ? wantedSamples.length\n          : image.getSamplesPerPixel();\n        const level = imageCount - (imageIndex + 1);\n\n        if (!sourceExtent) {\n          sourceExtent = getBoundingBox(image);\n        }\n\n        if (!sourceOrigin) {\n          sourceOrigin = getOrigin(image);\n        }\n\n        const imageResolutions = getResolutions(image, images[0]);\n        sourceResolutions[level] = imageResolutions[0];\n\n        const sourceTileSize = [image.getTileWidth(), image.getTileHeight()];\n\n        // request larger blocks for untiled layouts\n        if (\n          sourceTileSize[0] !== sourceTileSize[1] &&\n          sourceTileSize[1] < defaultTileSize\n        ) {\n          sourceTileSize[0] = defaultTileSize;\n          sourceTileSize[1] = defaultTileSize;\n        }\n\n        sourceTileSizes[level] = sourceTileSize;\n\n        const aspectRatio = imageResolutions[0] / Math.abs(imageResolutions[1]);\n        renderTileSizes[level] = [\n          sourceTileSize[0],\n          sourceTileSize[1] / aspectRatio,\n        ];\n      }\n\n      if (!extent) {\n        extent = sourceExtent;\n      } else {\n        getIntersection(extent, sourceExtent, extent);\n      }\n\n      if (!origin) {\n        origin = sourceOrigin;\n      } else {\n        const message = `Origin mismatch for source ${sourceIndex}, got [${sourceOrigin}] but expected [${origin}]`;\n        assertEqual(origin, sourceOrigin, 0, message, this.viewRejector);\n      }\n\n      if (!resolutions) {\n        resolutions = sourceResolutions;\n        this.resolutionFactors_[sourceIndex] = 1;\n      } else {\n        if (resolutions.length - minZoom > sourceResolutions.length) {\n          minZoom = resolutions.length - sourceResolutions.length;\n        }\n        const resolutionFactor =\n          resolutions[resolutions.length - 1] /\n          sourceResolutions[sourceResolutions.length - 1];\n        this.resolutionFactors_[sourceIndex] = resolutionFactor;\n        const scaledSourceResolutions = sourceResolutions.map(\n          (resolution) => (resolution *= resolutionFactor)\n        );\n        const message = `Resolution mismatch for source ${sourceIndex}, got [${scaledSourceResolutions}] but expected [${resolutions}]`;\n        assertEqual(\n          resolutions.slice(minZoom, resolutions.length),\n          scaledSourceResolutions,\n          0.02,\n          message,\n          this.viewRejector\n        );\n      }\n\n      if (!commonRenderTileSizes) {\n        commonRenderTileSizes = renderTileSizes;\n      } else {\n        assertEqual(\n          commonRenderTileSizes.slice(minZoom, commonRenderTileSizes.length),\n          renderTileSizes,\n          0.01,\n          `Tile size mismatch for source ${sourceIndex}`,\n          this.viewRejector\n        );\n      }\n\n      if (!commonSourceTileSizes) {\n        commonSourceTileSizes = sourceTileSizes;\n      } else {\n        assertEqual(\n          commonSourceTileSizes.slice(minZoom, commonSourceTileSizes.length),\n          sourceTileSizes,\n          0,\n          `Tile size mismatch for source ${sourceIndex}`,\n          this.viewRejector\n        );\n      }\n\n      this.sourceImagery_[sourceIndex] = images.reverse();\n      this.sourceMasks_[sourceIndex] = masks.reverse();\n    }\n\n    for (let i = 0, ii = this.sourceImagery_.length; i < ii; ++i) {\n      const sourceImagery = this.sourceImagery_[i];\n      while (sourceImagery.length < resolutions.length) {\n        sourceImagery.unshift(undefined);\n      }\n    }\n\n    if (!this.getProjection()) {\n      this.determineProjection(sources);\n    }\n\n    this.samplesPerPixel_ = samplesPerPixel;\n    this.nodataValues_ = nodataValues;\n    this.metadata_ = metadata;\n\n    // decide if we need to add an alpha band to handle nodata\n    outer: for (let sourceIndex = 0; sourceIndex < sourceCount; ++sourceIndex) {\n      // option 1: source is configured with a nodata value\n      if (this.sourceInfo_[sourceIndex].nodata !== undefined) {\n        this.addAlpha_ = true;\n        break;\n      }\n      if (this.sourceMasks_[sourceIndex].length) {\n        this.addAlpha_ = true;\n        break;\n      }\n\n      const values = nodataValues[sourceIndex];\n\n      // option 2: check image metadata for limited bands\n      const bands = this.sourceInfo_[sourceIndex].bands;\n      if (bands) {\n        for (let i = 0; i < bands.length; ++i) {\n          if (values[bands[i] - 1] !== null) {\n            this.addAlpha_ = true;\n            break outer;\n          }\n        }\n        continue;\n      }\n\n      // option 3: check image metadata for all bands\n      for (let imageIndex = 0; imageIndex < values.length; ++imageIndex) {\n        if (values[imageIndex] !== null) {\n          this.addAlpha_ = true;\n          break outer;\n        }\n      }\n    }\n\n    let bandCount = this.addAlpha_ ? 1 : 0;\n    for (let sourceIndex = 0; sourceIndex < sourceCount; ++sourceIndex) {\n      bandCount += samplesPerPixel[sourceIndex];\n    }\n    this.bandCount = bandCount;\n\n    const tileGrid = new TileGrid({\n      extent: extent,\n      minZoom: minZoom,\n      origin: origin,\n      resolutions: resolutions,\n      tileSizes: commonRenderTileSizes,\n    });\n\n    this.tileGrid = tileGrid;\n    this.setTileSizes(commonSourceTileSizes);\n\n    this.setLoader(this.loadTile_.bind(this));\n    this.setState('ready');\n\n    const zoom = 1;\n    if (resolutions.length === 2) {\n      resolutions = [resolutions[0], resolutions[1], resolutions[1] / 2];\n    } else if (resolutions.length === 1) {\n      resolutions = [resolutions[0] * 2, resolutions[0], resolutions[0] / 2];\n    }\n\n    this.viewResolver({\n      showFullExtent: true,\n      projection: this.projection,\n      resolutions: resolutions,\n      center: toUserCoordinate(getCenter(extent), this.projection),\n      extent: toUserExtent(extent, this.projection),\n      zoom: zoom,\n    });\n  }\n\n  /**\n   * @param {number} z The z tile index.\n   * @param {number} x The x tile index.\n   * @param {number} y The y tile index.\n   * @return {Promise} The composed tile data.\n   * @private\n   */\n  loadTile_(z, x, y) {\n    const sourceTileSize = this.getTileSize(z);\n    const sourceCount = this.sourceImagery_.length;\n    const requests = new Array(sourceCount * 2);\n    const nodataValues = this.nodataValues_;\n    const sourceInfo = this.sourceInfo_;\n    const pool = getWorkerPool();\n    for (let sourceIndex = 0; sourceIndex < sourceCount; ++sourceIndex) {\n      const source = sourceInfo[sourceIndex];\n      const resolutionFactor = this.resolutionFactors_[sourceIndex];\n      const pixelBounds = [\n        Math.round(x * (sourceTileSize[0] * resolutionFactor)),\n        Math.round(y * (sourceTileSize[1] * resolutionFactor)),\n        Math.round((x + 1) * (sourceTileSize[0] * resolutionFactor)),\n        Math.round((y + 1) * (sourceTileSize[1] * resolutionFactor)),\n      ];\n      const image = this.sourceImagery_[sourceIndex][z];\n      let samples;\n      if (source.bands) {\n        samples = source.bands.map(function (bandNumber) {\n          return bandNumber - 1;\n        });\n      }\n\n      /** @type {number|Array<number>} */\n      let fillValue;\n      if ('nodata' in source && source.nodata !== null) {\n        fillValue = source.nodata;\n      } else {\n        if (!samples) {\n          fillValue = nodataValues[sourceIndex];\n        } else {\n          fillValue = samples.map(function (sampleIndex) {\n            return nodataValues[sourceIndex][sampleIndex];\n          });\n        }\n      }\n\n      const readOptions = {\n        window: pixelBounds,\n        width: sourceTileSize[0],\n        height: sourceTileSize[1],\n        samples: samples,\n        fillValue: fillValue,\n        pool: pool,\n        interleave: false,\n      };\n      if (readRGB(this.convertToRGB_, image)) {\n        requests[sourceIndex] = image.readRGB(readOptions);\n      } else {\n        requests[sourceIndex] = image.readRasters(readOptions);\n      }\n\n      // requests after `sourceCount` are for mask data (if any)\n      const maskIndex = sourceCount + sourceIndex;\n      const mask = this.sourceMasks_[sourceIndex][z];\n      if (!mask) {\n        requests[maskIndex] = Promise.resolve(null);\n        continue;\n      }\n\n      requests[maskIndex] = mask.readRasters({\n        window: pixelBounds,\n        width: sourceTileSize[0],\n        height: sourceTileSize[1],\n        samples: [0],\n        pool: pool,\n        interleave: false,\n      });\n    }\n\n    return Promise.all(requests)\n      .then(this.composeTile_.bind(this, sourceTileSize))\n      .catch(function (error) {\n        logError(error);\n        throw error;\n      });\n  }\n\n  /**\n   * @param {import(\"../size.js\").Size} sourceTileSize The source tile size.\n   * @param {Array} sourceSamples The source samples.\n   * @return {import(\"../DataTile.js\").Data} The composed tile data.\n   * @private\n   */\n  composeTile_(sourceTileSize, sourceSamples) {\n    const metadata = this.metadata_;\n    const sourceInfo = this.sourceInfo_;\n    const sourceCount = this.sourceImagery_.length;\n    const bandCount = this.bandCount;\n    const samplesPerPixel = this.samplesPerPixel_;\n    const nodataValues = this.nodataValues_;\n    const normalize = this.normalize_;\n    const addAlpha = this.addAlpha_;\n\n    const pixelCount = sourceTileSize[0] * sourceTileSize[1];\n    const dataLength = pixelCount * bandCount;\n\n    /** @type {Uint8Array|Float32Array} */\n    let data;\n    if (normalize) {\n      data = new Uint8Array(dataLength);\n    } else {\n      data = new Float32Array(dataLength);\n    }\n\n    let dataIndex = 0;\n    for (let pixelIndex = 0; pixelIndex < pixelCount; ++pixelIndex) {\n      let transparent = addAlpha;\n      for (let sourceIndex = 0; sourceIndex < sourceCount; ++sourceIndex) {\n        const source = sourceInfo[sourceIndex];\n\n        let min = source.min;\n        let max = source.max;\n        let gain, bias;\n        if (normalize) {\n          const stats = metadata[sourceIndex][0];\n          if (min === undefined) {\n            if (stats && STATISTICS_MINIMUM in stats) {\n              min = parseFloat(stats[STATISTICS_MINIMUM]);\n            } else {\n              min = getMinForDataType(sourceSamples[sourceIndex][0]);\n            }\n          }\n          if (max === undefined) {\n            if (stats && STATISTICS_MAXIMUM in stats) {\n              max = parseFloat(stats[STATISTICS_MAXIMUM]);\n            } else {\n              max = getMaxForDataType(sourceSamples[sourceIndex][0]);\n            }\n          }\n\n          gain = 255 / (max - min);\n          bias = -min * gain;\n        }\n\n        for (\n          let sampleIndex = 0;\n          sampleIndex < samplesPerPixel[sourceIndex];\n          ++sampleIndex\n        ) {\n          const sourceValue =\n            sourceSamples[sourceIndex][sampleIndex][pixelIndex];\n\n          let value;\n          if (normalize) {\n            value = clamp(gain * sourceValue + bias, 0, 255);\n          } else {\n            value = sourceValue;\n          }\n\n          if (!addAlpha) {\n            data[dataIndex] = value;\n          } else {\n            let nodata = source.nodata;\n            if (nodata === undefined) {\n              let bandIndex;\n              if (source.bands) {\n                bandIndex = source.bands[sampleIndex] - 1;\n              } else {\n                bandIndex = sampleIndex;\n              }\n              nodata = nodataValues[sourceIndex][bandIndex];\n            }\n\n            const nodataIsNaN = isNaN(nodata);\n            if (\n              (!nodataIsNaN && sourceValue !== nodata) ||\n              (nodataIsNaN && !isNaN(sourceValue))\n            ) {\n              transparent = false;\n              data[dataIndex] = value;\n            }\n          }\n          dataIndex++;\n        }\n        if (!transparent) {\n          const maskIndex = sourceCount + sourceIndex;\n          const mask = sourceSamples[maskIndex];\n          if (mask && !mask[0][pixelIndex]) {\n            transparent = true;\n          }\n        }\n      }\n      if (addAlpha) {\n        if (!transparent) {\n          data[dataIndex] = 255;\n        }\n        dataIndex++;\n      }\n    }\n\n    return data;\n  }\n}\n\n/**\n * Get a promise for view properties based on the source.  Use the result of this function\n * as the `view` option in a map constructor.\n *\n *     const source = new GeoTIFF(options);\n *\n *     const map = new Map({\n *       target: 'map',\n *       layers: [\n *         new TileLayer({\n *           source: source,\n *         }),\n *       ],\n *       view: source.getView(),\n *     });\n *\n * @function\n * @return {Promise<import(\"../View.js\").ViewOptions>} A promise for view-related properties.\n * @api\n *\n */\nGeoTIFFSource.prototype.getView;\n\nexport default GeoTIFFSource;\n","/**\n * @module ol/source/Zoomify\n */\nimport {DEFAULT_TILE_SIZE} from '../tilegrid/common.js';\n\nimport ImageTile from '../ImageTile.js';\nimport TileGrid from '../tilegrid/TileGrid.js';\nimport TileImage from './TileImage.js';\nimport TileState from '../TileState.js';\nimport {assert} from '../asserts.js';\nimport {createCanvasContext2D} from '../dom.js';\nimport {createFromTileUrlFunctions, expandUrl} from '../tileurlfunction.js';\nimport {getCenter} from '../extent.js';\nimport {toSize} from '../size.js';\n\n/**\n * @typedef {'default' | 'truncated'} TierSizeCalculation\n */\n\nexport class CustomTile extends ImageTile {\n  /**\n   * @param {import(\"../size.js\").Size} tileSize Full tile size.\n   * @param {import(\"../tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n   * @param {import(\"../TileState.js\").default} state State.\n   * @param {string} src Image source URI.\n   * @param {?string} crossOrigin Cross origin.\n   * @param {import(\"../Tile.js\").LoadFunction} tileLoadFunction Tile load function.\n   * @param {import(\"../Tile.js\").Options} [options] Tile options.\n   */\n  constructor(\n    tileSize,\n    tileCoord,\n    state,\n    src,\n    crossOrigin,\n    tileLoadFunction,\n    options\n  ) {\n    super(tileCoord, state, src, crossOrigin, tileLoadFunction, options);\n\n    /**\n     * @private\n     * @type {HTMLCanvasElement|HTMLImageElement|HTMLVideoElement}\n     */\n    this.zoomifyImage_ = null;\n\n    /**\n     * @type {import(\"../size.js\").Size}\n     */\n    this.tileSize_ = tileSize;\n  }\n\n  /**\n   * Get the image element for this tile.\n   * @return {HTMLCanvasElement|HTMLImageElement|HTMLVideoElement} Image.\n   */\n  getImage() {\n    if (this.zoomifyImage_) {\n      return this.zoomifyImage_;\n    }\n    const image = super.getImage();\n    if (this.state == TileState.LOADED) {\n      const tileSize = this.tileSize_;\n      if (image.width == tileSize[0] && image.height == tileSize[1]) {\n        this.zoomifyImage_ = image;\n        return image;\n      }\n      const context = createCanvasContext2D(tileSize[0], tileSize[1]);\n      context.drawImage(image, 0, 0);\n      this.zoomifyImage_ = context.canvas;\n      return context.canvas;\n    }\n    return image;\n  }\n}\n\n/**\n * @typedef {Object} Options\n * @property {import(\"./Source.js\").AttributionLike} [attributions] Attributions.\n * @property {number} [cacheSize] Initial tile cache size. Will auto-grow to hold at least the number of tiles in the viewport.\n * @property {null|string} [crossOrigin] The `crossOrigin` attribute for loaded images.  Note that\n * you must provide a `crossOrigin` value  you want to access pixel data with the Canvas renderer.\n * See https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image for more detail.\n * @property {boolean} [interpolate=true] Use interpolated values when resampling.  By default,\n * linear interpolation is used when resampling.  Set to false to use the nearest neighbor instead.\n * @property {import(\"../proj.js\").ProjectionLike} [projection] Projection.\n * @property {number} [tilePixelRatio] The pixel ratio used by the tile service. For example, if the tile service advertizes 256px by 256px tiles but actually sends 512px by 512px images (for retina/hidpi devices) then `tilePixelRatio` should be set to `2`\n * @property {number} [reprojectionErrorThreshold=0.5] Maximum allowed reprojection error (in pixels).\n * Higher values can increase reprojection performance, but decrease precision.\n * @property {string} url URL template or base URL of the Zoomify service.\n * A base URL is the fixed part\n * of the URL, excluding the tile group, z, x, and y folder structure, e.g.\n * `http://my.zoomify.info/IMAGE.TIF/`. A URL template must include\n * `{TileGroup}`, `{x}`, `{y}`, and `{z}` placeholders, e.g.\n * `http://my.zoomify.info/IMAGE.TIF/{TileGroup}/{z}-{x}-{y}.jpg`.\n * Internet Imaging Protocol (IIP) with JTL extension can be also used with\n * `{tileIndex}` and `{z}` placeholders, e.g.\n * `http://my.zoomify.info?FIF=IMAGE.TIF&JTL={z},{tileIndex}`.\n * A `{?-?}` template pattern, for example `subdomain{a-f}.domain.com`, may be\n * used instead of defining each one separately in the `urls` option.\n * @property {TierSizeCalculation} [tierSizeCalculation] Tier size calculation method: `default` or `truncated`.\n * @property {import(\"../size.js\").Size} size Size.\n * @property {import(\"../extent.js\").Extent} [extent] Extent for the TileGrid that is created.\n * Default sets the TileGrid in the\n * fourth quadrant, meaning extent is `[0, -height, width, 0]`. To change the\n * extent to the first quadrant (the default for OpenLayers 2) set the extent\n * as `[0, 0, width, height]`.\n * @property {number} [transition] Duration of the opacity transition for rendering.\n * To disable the opacity transition, pass `transition: 0`.\n * @property {number} [tileSize=256] Tile size. Same tile size is used for all zoom levels.\n * @property {number|import(\"../array.js\").NearestDirectionFunction} [zDirection=0]\n * Choose whether to use tiles with a higher or lower zoom level when between integer\n * zoom levels. See {@link module:ol/tilegrid/TileGrid~TileGrid#getZForResolution}.\n */\n\n/**\n * @classdesc\n * Layer source for tile data in Zoomify format (both Zoomify and Internet\n * Imaging Protocol are supported).\n * @api\n */\nclass Zoomify extends TileImage {\n  /**\n   * @param {Options} options Options.\n   */\n  constructor(options) {\n    const size = options.size;\n    const tierSizeCalculation =\n      options.tierSizeCalculation !== undefined\n        ? options.tierSizeCalculation\n        : 'default';\n\n    const tilePixelRatio = options.tilePixelRatio || 1;\n    const imageWidth = size[0];\n    const imageHeight = size[1];\n    const tierSizeInTiles = [];\n    const tileSize = options.tileSize || DEFAULT_TILE_SIZE;\n    let tileSizeForTierSizeCalculation = tileSize * tilePixelRatio;\n\n    switch (tierSizeCalculation) {\n      case 'default':\n        while (\n          imageWidth > tileSizeForTierSizeCalculation ||\n          imageHeight > tileSizeForTierSizeCalculation\n        ) {\n          tierSizeInTiles.push([\n            Math.ceil(imageWidth / tileSizeForTierSizeCalculation),\n            Math.ceil(imageHeight / tileSizeForTierSizeCalculation),\n          ]);\n          tileSizeForTierSizeCalculation += tileSizeForTierSizeCalculation;\n        }\n        break;\n      case 'truncated':\n        let width = imageWidth;\n        let height = imageHeight;\n        while (\n          width > tileSizeForTierSizeCalculation ||\n          height > tileSizeForTierSizeCalculation\n        ) {\n          tierSizeInTiles.push([\n            Math.ceil(width / tileSizeForTierSizeCalculation),\n            Math.ceil(height / tileSizeForTierSizeCalculation),\n          ]);\n          width >>= 1;\n          height >>= 1;\n        }\n        break;\n      default: // Unknown `tierSizeCalculation` configured\n        assert(false, 53);\n        break;\n    }\n\n    tierSizeInTiles.push([1, 1]);\n    tierSizeInTiles.reverse();\n\n    const resolutions = [tilePixelRatio];\n    const tileCountUpToTier = [0];\n    for (let i = 1, ii = tierSizeInTiles.length; i < ii; i++) {\n      resolutions.push(tilePixelRatio << i);\n      tileCountUpToTier.push(\n        tierSizeInTiles[i - 1][0] * tierSizeInTiles[i - 1][1] +\n          tileCountUpToTier[i - 1]\n      );\n    }\n    resolutions.reverse();\n\n    const tileGrid = new TileGrid({\n      tileSize: tileSize,\n      extent: options.extent || [0, -imageHeight, imageWidth, 0],\n      resolutions: resolutions,\n    });\n\n    let url = options.url;\n    if (url && !url.includes('{TileGroup}') && !url.includes('{tileIndex}')) {\n      url += '{TileGroup}/{z}-{x}-{y}.jpg';\n    }\n    const urls = expandUrl(url);\n\n    let tileWidth = tileSize * tilePixelRatio;\n\n    /**\n     * @param {string} template Template.\n     * @return {import(\"../Tile.js\").UrlFunction} Tile URL function.\n     */\n    function createFromTemplate(template) {\n      return (\n        /**\n         * @param {import(\"../tilecoord.js\").TileCoord} tileCoord Tile Coordinate.\n         * @param {number} pixelRatio Pixel ratio.\n         * @param {import(\"../proj/Projection.js\").default} projection Projection.\n         * @return {string|undefined} Tile URL.\n         */\n        function (tileCoord, pixelRatio, projection) {\n          if (!tileCoord) {\n            return undefined;\n          }\n          const tileCoordZ = tileCoord[0];\n          const tileCoordX = tileCoord[1];\n          const tileCoordY = tileCoord[2];\n          const tileIndex =\n            tileCoordX + tileCoordY * tierSizeInTiles[tileCoordZ][0];\n          const tileGroup =\n            ((tileIndex + tileCountUpToTier[tileCoordZ]) / tileWidth) | 0;\n          const localContext = {\n            'z': tileCoordZ,\n            'x': tileCoordX,\n            'y': tileCoordY,\n            'tileIndex': tileIndex,\n            'TileGroup': 'TileGroup' + tileGroup,\n          };\n          return template.replace(/\\{(\\w+?)\\}/g, function (m, p) {\n            return localContext[p];\n          });\n        }\n      );\n    }\n\n    const tileUrlFunction = createFromTileUrlFunctions(\n      urls.map(createFromTemplate)\n    );\n\n    const ZoomifyTileClass = CustomTile.bind(\n      null,\n      toSize(tileSize * tilePixelRatio)\n    );\n\n    super({\n      attributions: options.attributions,\n      cacheSize: options.cacheSize,\n      crossOrigin: options.crossOrigin,\n      interpolate: options.interpolate,\n      projection: options.projection,\n      tilePixelRatio: tilePixelRatio,\n      reprojectionErrorThreshold: options.reprojectionErrorThreshold,\n      tileClass: ZoomifyTileClass,\n      tileGrid: tileGrid,\n      tileUrlFunction: tileUrlFunction,\n      transition: options.transition,\n    });\n\n    /**\n     * @type {number|import(\"../array.js\").NearestDirectionFunction}\n     */\n    this.zDirection = options.zDirection;\n\n    // Server retina tile detection (non-standard):\n    // Try loading the center tile for the highest resolution. If it is not\n    // available, we are dealing with retina tiles, and need to adjust the\n    // tile url calculation.\n    const tileUrl = tileGrid.getTileCoordForCoordAndResolution(\n      getCenter(tileGrid.getExtent()),\n      resolutions[resolutions.length - 1]\n    );\n    const testTileUrl = tileUrlFunction(tileUrl, 1, null);\n    const image = new Image();\n    image.addEventListener('error', () => {\n      tileWidth = tileSize;\n      this.changed();\n    });\n    image.src = testTileUrl;\n  }\n}\n\nexport default Zoomify;\n","/**\n * @module ol/format/IIIFInfo\n */\n\nimport {assert} from '../asserts.js';\n\n/**\n * @typedef {Object} PreferredOptions\n * @property {string} [format] Preferred image format. Will be used if the image information\n * indicates support for that format.\n * @property {string} [quality] IIIF image qualitiy.  Will be used if the image information\n * indicates support for that quality.\n */\n\n/**\n * @typedef {Object} SupportedFeatures\n * @property {Array<string>} [supports] Supported IIIF image size and region\n * calculation features.\n * @property {Array<string>} [formats] Supported image formats.\n * @property {Array<string>} [qualities] Supported IIIF image qualities.\n */\n\n/**\n * @typedef {Object} TileInfo\n * @property {Array<number>} scaleFactors Supported resolution scaling factors.\n * @property {number} width Tile width in pixels.\n * @property {number} [height] Tile height in pixels. Same as tile width if height is\n * not given.\n */\n\n/**\n * @typedef {Object} IiifProfile\n * @property {Array<string>} [formats] Supported image formats for the image service.\n * @property {Array<string>} [qualities] Supported IIIF image qualities.\n * @property {Array<string>} [supports] Supported features.\n * @property {number} [maxArea] Maximum area (pixels) available for this image service.\n * @property {number} [maxHeight] Maximum height.\n * @property {number} [maxWidth] Maximum width.\n */\n\n/**\n * @typedef {Object<string,string|number|Array<number|string|IiifProfile|Object<string, number>|TileInfo>>}\n *    ImageInformationResponse\n */\n\n/**\n * Enum representing the major IIIF Image API versions\n * @enum {string}\n */\nexport const Versions = {\n  VERSION1: 'version1',\n  VERSION2: 'version2',\n  VERSION3: 'version3',\n};\n\n/**\n * Supported image formats, qualities and supported region / size calculation features\n * for different image API versions and compliance levels\n * @const\n * @type {Object<string, Object<string, SupportedFeatures>>}\n */\nconst IIIF_PROFILE_VALUES = {};\nIIIF_PROFILE_VALUES[Versions.VERSION1] = {\n  'level0': {\n    supports: [],\n    formats: [],\n    qualities: ['native'],\n  },\n  'level1': {\n    supports: ['regionByPx', 'sizeByW', 'sizeByH', 'sizeByPct'],\n    formats: ['jpg'],\n    qualities: ['native'],\n  },\n  'level2': {\n    supports: [\n      'regionByPx',\n      'regionByPct',\n      'sizeByW',\n      'sizeByH',\n      'sizeByPct',\n      'sizeByConfinedWh',\n      'sizeByWh',\n    ],\n    formats: ['jpg', 'png'],\n    qualities: ['native', 'color', 'grey', 'bitonal'],\n  },\n};\nIIIF_PROFILE_VALUES[Versions.VERSION2] = {\n  'level0': {\n    supports: [],\n    formats: ['jpg'],\n    qualities: ['default'],\n  },\n  'level1': {\n    supports: ['regionByPx', 'sizeByW', 'sizeByH', 'sizeByPct'],\n    formats: ['jpg'],\n    qualities: ['default'],\n  },\n  'level2': {\n    supports: [\n      'regionByPx',\n      'regionByPct',\n      'sizeByW',\n      'sizeByH',\n      'sizeByPct',\n      'sizeByConfinedWh',\n      'sizeByDistortedWh',\n      'sizeByWh',\n    ],\n    formats: ['jpg', 'png'],\n    qualities: ['default', 'bitonal'],\n  },\n};\nIIIF_PROFILE_VALUES[Versions.VERSION3] = {\n  'level0': {\n    supports: [],\n    formats: ['jpg'],\n    qualities: ['default'],\n  },\n  'level1': {\n    supports: ['regionByPx', 'regionSquare', 'sizeByW', 'sizeByH', 'sizeByWh'],\n    formats: ['jpg'],\n    qualities: ['default'],\n  },\n  'level2': {\n    supports: [\n      'regionByPx',\n      'regionSquare',\n      'regionByPct',\n      'sizeByW',\n      'sizeByH',\n      'sizeByPct',\n      'sizeByConfinedWh',\n      'sizeByWh',\n    ],\n    formats: ['jpg', 'png'],\n    qualities: ['default'],\n  },\n};\nIIIF_PROFILE_VALUES['none'] = {\n  'none': {\n    supports: [],\n    formats: [],\n    qualities: [],\n  },\n};\n\nconst COMPLIANCE_VERSION1 =\n  /^https?:\\/\\/library\\.stanford\\.edu\\/iiif\\/image-api\\/(?:1\\.1\\/)?compliance\\.html#level[0-2]$/;\nconst COMPLIANCE_VERSION2 =\n  /^https?:\\/\\/iiif\\.io\\/api\\/image\\/2\\/level[0-2](?:\\.json)?$/;\nconst COMPLIANCE_VERSION3 =\n  /(^https?:\\/\\/iiif\\.io\\/api\\/image\\/3\\/level[0-2](?:\\.json)?$)|(^level[0-2]$)/;\n\nfunction generateVersion1Options(iiifInfo) {\n  let levelProfile = iiifInfo.getComplianceLevelSupportedFeatures();\n  // Version 1.0 and 1.1 do not require a profile.\n  if (levelProfile === undefined) {\n    levelProfile = IIIF_PROFILE_VALUES[Versions.VERSION1]['level0'];\n  }\n  return {\n    url:\n      iiifInfo.imageInfo['@id'] === undefined\n        ? undefined\n        : iiifInfo.imageInfo['@id'].replace(/\\/?(?:info\\.json)?$/g, ''),\n    supports: levelProfile.supports,\n    formats: [\n      ...levelProfile.formats,\n      iiifInfo.imageInfo.formats === undefined\n        ? []\n        : iiifInfo.imageInfo.formats,\n    ],\n    qualities: [\n      ...levelProfile.qualities,\n      iiifInfo.imageInfo.qualities === undefined\n        ? []\n        : iiifInfo.imageInfo.qualities,\n    ],\n    resolutions: iiifInfo.imageInfo.scale_factors,\n    tileSize:\n      iiifInfo.imageInfo.tile_width !== undefined\n        ? iiifInfo.imageInfo.tile_height !== undefined\n          ? [iiifInfo.imageInfo.tile_width, iiifInfo.imageInfo.tile_height]\n          : [iiifInfo.imageInfo.tile_width, iiifInfo.imageInfo.tile_width]\n        : iiifInfo.imageInfo.tile_height != undefined\n        ? [iiifInfo.imageInfo.tile_height, iiifInfo.imageInfo.tile_height]\n        : undefined,\n  };\n}\n\nfunction generateVersion2Options(iiifInfo) {\n  const levelProfile = iiifInfo.getComplianceLevelSupportedFeatures(),\n    additionalProfile =\n      Array.isArray(iiifInfo.imageInfo.profile) &&\n      iiifInfo.imageInfo.profile.length > 1,\n    profileSupports =\n      additionalProfile && iiifInfo.imageInfo.profile[1].supports\n        ? iiifInfo.imageInfo.profile[1].supports\n        : [],\n    profileFormats =\n      additionalProfile && iiifInfo.imageInfo.profile[1].formats\n        ? iiifInfo.imageInfo.profile[1].formats\n        : [],\n    profileQualities =\n      additionalProfile && iiifInfo.imageInfo.profile[1].qualities\n        ? iiifInfo.imageInfo.profile[1].qualities\n        : [];\n  return {\n    url: iiifInfo.imageInfo['@id'].replace(/\\/?(?:info\\.json)?$/g, ''),\n    sizes:\n      iiifInfo.imageInfo.sizes === undefined\n        ? undefined\n        : iiifInfo.imageInfo.sizes.map(function (size) {\n            return [size.width, size.height];\n          }),\n    tileSize:\n      iiifInfo.imageInfo.tiles === undefined\n        ? undefined\n        : [\n            iiifInfo.imageInfo.tiles.map(function (tile) {\n              return tile.width;\n            })[0],\n            iiifInfo.imageInfo.tiles.map(function (tile) {\n              return tile.height === undefined ? tile.width : tile.height;\n            })[0],\n          ],\n    resolutions:\n      iiifInfo.imageInfo.tiles === undefined\n        ? undefined\n        : iiifInfo.imageInfo.tiles.map(function (tile) {\n            return tile.scaleFactors;\n          })[0],\n    supports: [...levelProfile.supports, ...profileSupports],\n    formats: [...levelProfile.formats, ...profileFormats],\n    qualities: [...levelProfile.qualities, ...profileQualities],\n  };\n}\n\nfunction generateVersion3Options(iiifInfo) {\n  const levelProfile = iiifInfo.getComplianceLevelSupportedFeatures(),\n    formats =\n      iiifInfo.imageInfo.extraFormats === undefined\n        ? levelProfile.formats\n        : [...levelProfile.formats, ...iiifInfo.imageInfo.extraFormats],\n    preferredFormat =\n      iiifInfo.imageInfo.preferredFormats !== undefined &&\n      Array.isArray(iiifInfo.imageInfo.preferredFormats) &&\n      iiifInfo.imageInfo.preferredFormats.length > 0\n        ? iiifInfo.imageInfo.preferredFormats\n            .filter(function (format) {\n              return ['jpg', 'png', 'gif'].includes(format);\n            })\n            .reduce(function (acc, format) {\n              return acc === undefined && formats.includes(format)\n                ? format\n                : acc;\n            }, undefined)\n        : undefined;\n  return {\n    url: iiifInfo.imageInfo['id'],\n    sizes:\n      iiifInfo.imageInfo.sizes === undefined\n        ? undefined\n        : iiifInfo.imageInfo.sizes.map(function (size) {\n            return [size.width, size.height];\n          }),\n    tileSize:\n      iiifInfo.imageInfo.tiles === undefined\n        ? undefined\n        : [\n            iiifInfo.imageInfo.tiles.map(function (tile) {\n              return tile.width;\n            })[0],\n            iiifInfo.imageInfo.tiles.map(function (tile) {\n              return tile.height;\n            })[0],\n          ],\n    resolutions:\n      iiifInfo.imageInfo.tiles === undefined\n        ? undefined\n        : iiifInfo.imageInfo.tiles.map(function (tile) {\n            return tile.scaleFactors;\n          })[0],\n    supports:\n      iiifInfo.imageInfo.extraFeatures === undefined\n        ? levelProfile.supports\n        : [...levelProfile.supports, ...iiifInfo.imageInfo.extraFeatures],\n    formats: formats,\n    qualities:\n      iiifInfo.imageInfo.extraQualities === undefined\n        ? levelProfile.qualities\n        : [...levelProfile.qualities, ...iiifInfo.imageInfo.extraQualities],\n    preferredFormat: preferredFormat,\n  };\n}\n\nconst versionFunctions = {};\nversionFunctions[Versions.VERSION1] = generateVersion1Options;\nversionFunctions[Versions.VERSION2] = generateVersion2Options;\nversionFunctions[Versions.VERSION3] = generateVersion3Options;\n\n/**\n * @classdesc\n * Format for transforming IIIF Image API image information responses into\n * IIIF tile source ready options\n *\n * @api\n */\nclass IIIFInfo {\n  /**\n   * @param {string|ImageInformationResponse} imageInfo\n   * Deserialized image information JSON response object or JSON response as string\n   */\n  constructor(imageInfo) {\n    this.setImageInfo(imageInfo);\n  }\n\n  /**\n   * @param {string|ImageInformationResponse} imageInfo\n   * Deserialized image information JSON response object or JSON response as string\n   * @api\n   */\n  setImageInfo(imageInfo) {\n    if (typeof imageInfo == 'string') {\n      this.imageInfo = JSON.parse(imageInfo);\n    } else {\n      this.imageInfo = imageInfo;\n    }\n  }\n\n  /**\n   * @return {Versions|undefined} Major IIIF version.\n   * @api\n   */\n  getImageApiVersion() {\n    if (this.imageInfo === undefined) {\n      return undefined;\n    }\n    let context = this.imageInfo['@context'] || 'ol-no-context';\n    if (typeof context == 'string') {\n      context = [context];\n    }\n    for (let i = 0; i < context.length; i++) {\n      switch (context[i]) {\n        case 'http://library.stanford.edu/iiif/image-api/1.1/context.json':\n        case 'http://iiif.io/api/image/1/context.json':\n          return Versions.VERSION1;\n        case 'http://iiif.io/api/image/2/context.json':\n          return Versions.VERSION2;\n        case 'http://iiif.io/api/image/3/context.json':\n          return Versions.VERSION3;\n        case 'ol-no-context':\n          // Image API 1.0 has no '@context'\n          if (\n            this.getComplianceLevelEntryFromProfile(Versions.VERSION1) &&\n            this.imageInfo.identifier\n          ) {\n            return Versions.VERSION1;\n          }\n          break;\n        default:\n      }\n    }\n    assert(false, 61);\n  }\n\n  /**\n   * @param {Versions} version Optional IIIF image API version\n   * @return {string|undefined} Compliance level as it appears in the IIIF image information\n   * response.\n   */\n  getComplianceLevelEntryFromProfile(version) {\n    if (this.imageInfo === undefined || this.imageInfo.profile === undefined) {\n      return undefined;\n    }\n    if (version === undefined) {\n      version = this.getImageApiVersion();\n    }\n    switch (version) {\n      case Versions.VERSION1:\n        if (COMPLIANCE_VERSION1.test(this.imageInfo.profile)) {\n          return this.imageInfo.profile;\n        }\n        break;\n      case Versions.VERSION3:\n        if (COMPLIANCE_VERSION3.test(this.imageInfo.profile)) {\n          return this.imageInfo.profile;\n        }\n        break;\n      case Versions.VERSION2:\n        if (\n          typeof this.imageInfo.profile === 'string' &&\n          COMPLIANCE_VERSION2.test(this.imageInfo.profile)\n        ) {\n          return this.imageInfo.profile;\n        }\n        if (\n          Array.isArray(this.imageInfo.profile) &&\n          this.imageInfo.profile.length > 0 &&\n          typeof this.imageInfo.profile[0] === 'string' &&\n          COMPLIANCE_VERSION2.test(this.imageInfo.profile[0])\n        ) {\n          return this.imageInfo.profile[0];\n        }\n        break;\n      default:\n    }\n    return undefined;\n  }\n\n  /**\n   * @param {Versions} version Optional IIIF image API version\n   * @return {string} Compliance level, on of 'level0', 'level1' or 'level2' or undefined\n   */\n  getComplianceLevelFromProfile(version) {\n    const complianceLevel = this.getComplianceLevelEntryFromProfile(version);\n    if (complianceLevel === undefined) {\n      return undefined;\n    }\n    const level = complianceLevel.match(/level[0-2](?:\\.json)?$/g);\n    return Array.isArray(level) ? level[0].replace('.json', '') : undefined;\n  }\n\n  /**\n   * @return {SupportedFeatures|undefined} Image formats, qualities and region / size calculation\n   * methods that are supported by the IIIF service.\n   */\n  getComplianceLevelSupportedFeatures() {\n    if (this.imageInfo === undefined) {\n      return undefined;\n    }\n    const version = this.getImageApiVersion();\n    const level = this.getComplianceLevelFromProfile(version);\n    if (level === undefined) {\n      return IIIF_PROFILE_VALUES['none']['none'];\n    }\n    return IIIF_PROFILE_VALUES[version][level];\n  }\n\n  /**\n   * @param {PreferredOptions} [preferredOptions] Optional options for preferred format and quality.\n   * @return {import(\"../source/IIIF.js\").Options|undefined} IIIF tile source ready constructor options.\n   * @api\n   */\n  getTileSourceOptions(preferredOptions) {\n    const options = preferredOptions || {},\n      version = this.getImageApiVersion();\n    if (version === undefined) {\n      return undefined;\n    }\n    const imageOptions =\n      version === undefined ? undefined : versionFunctions[version](this);\n    if (imageOptions === undefined) {\n      return undefined;\n    }\n    return {\n      url: imageOptions.url,\n      version: version,\n      size: [this.imageInfo.width, this.imageInfo.height],\n      sizes: imageOptions.sizes,\n      format:\n        options.format !== undefined &&\n        imageOptions.formats.includes(options.format)\n          ? options.format\n          : imageOptions.preferredFormat !== undefined\n          ? imageOptions.preferredFormat\n          : 'jpg',\n      supports: imageOptions.supports,\n      quality:\n        options.quality && imageOptions.qualities.includes(options.quality)\n          ? options.quality\n          : imageOptions.qualities.includes('native')\n          ? 'native'\n          : 'default',\n      resolutions: Array.isArray(imageOptions.resolutions)\n        ? imageOptions.resolutions.sort(function (a, b) {\n            return b - a;\n          })\n        : undefined,\n      tileSize: imageOptions.tileSize,\n    };\n  }\n}\n\nexport default IIIFInfo;\n","/**\n * @module ol/source/IIIF\n */\n\nimport TileGrid from '../tilegrid/TileGrid.js';\nimport TileImage from './TileImage.js';\nimport {CustomTile} from './Zoomify.js';\nimport {DEFAULT_TILE_SIZE} from '../tilegrid/common.js';\nimport {Versions} from '../format/IIIFInfo.js';\nimport {assert} from '../asserts.js';\nimport {getTopLeft} from '../extent.js';\nimport {toSize} from '../size.js';\n\n/**\n * @typedef {Object} Options\n * @property {import(\"./Source.js\").AttributionLike} [attributions] Attributions.\n * @property {boolean} [attributionsCollapsible=true] Attributions are collapsible.\n * @property {number} [cacheSize] Size of the cache.\n * @property {null|string} [crossOrigin] The value for the crossOrigin option of the request.\n * @property {import(\"../extent.js\").Extent} [extent=[0, -height, width, 0]] The extent.\n * @property {string} [format='jpg'] Requested image format.\n * @property {boolean} [interpolate=true] Use interpolated values when resampling.  By default,\n * linear interpolation is used when resampling.  Set to false to use the nearest neighbor instead.\n * @property {import(\"../proj.js\").ProjectionLike} [projection] Projection.\n * @property {string} [quality] Requested IIIF image quality. Default is 'native'\n * for version 1, 'default' for versions 2 and 3.\n * @property {number} [reprojectionErrorThreshold=0.5] Maximum allowed reprojection error (in pixels).\n * Higher values can increase reprojection performance, but decrease precision.\n * @property {Array<number>} [resolutions] Supported resolutions as given in IIIF 'scaleFactors'\n * @property {import(\"../size.js\").Size} size Size of the image [width, height].\n * @property {Array<import(\"../size.js\").Size>} [sizes] Supported scaled image sizes.\n * Content of the IIIF info.json 'sizes' property, but as array of Size objects.\n * @property {import(\"./Source.js\").State} [state] Source state.\n * @property {Array<string>} [supports=[]] Supported IIIF region and size calculation\n * features.\n * @property {number} [tilePixelRatio] Tile pixel ratio.\n * @property {number|import(\"../size.js\").Size} [tileSize] Tile size.\n * Same tile size is used for all zoom levels. If tile size is a number,\n * a square tile is assumed. If the IIIF image service supports arbitrary\n * tiling (sizeByH, sizeByW, sizeByWh or sizeByPct as well as regionByPx or regionByPct\n * are supported), the default tilesize is 256.\n * @property {number} [transition] Transition.\n * @property {string} [url] Base URL of the IIIF Image service.\n * This should be the same as the IIIF Image ID.\n * @property {import(\"../format/IIIFInfo.js\").Versions} [version=Versions.VERSION2] Service's IIIF Image API version.\n * @property {number|import(\"../array.js\").NearestDirectionFunction} [zDirection=0]\n * Choose whether to use tiles with a higher or lower zoom level when between integer\n * zoom levels. See {@link module:ol/tilegrid/TileGrid~TileGrid#getZForResolution}.\n */\n\nfunction formatPercentage(percentage) {\n  return percentage.toLocaleString('en', {maximumFractionDigits: 10});\n}\n\n/**\n * @classdesc\n * Layer source for IIIF Image API services.\n * @api\n */\nclass IIIF extends TileImage {\n  /**\n   * @param {Options} [options] Tile source options. Use {@link import(\"../format/IIIFInfo.js\").IIIFInfo}\n   * to parse Image API service information responses into constructor options.\n   * @api\n   */\n  constructor(options) {\n    /**\n     * @type {Partial<Options>}\n     */\n    const partialOptions = options || {};\n\n    let baseUrl = partialOptions.url || '';\n    baseUrl =\n      baseUrl +\n      (baseUrl.lastIndexOf('/') === baseUrl.length - 1 || baseUrl === ''\n        ? ''\n        : '/');\n    const version = partialOptions.version || Versions.VERSION2;\n    const sizes = partialOptions.sizes || [];\n    const size = partialOptions.size;\n    assert(\n      size != undefined &&\n        Array.isArray(size) &&\n        size.length == 2 &&\n        !isNaN(size[0]) &&\n        size[0] > 0 &&\n        !isNaN(size[1]) &&\n        size[1] > 0,\n      60\n    );\n    const width = size[0];\n    const height = size[1];\n    const tileSize = partialOptions.tileSize;\n    const tilePixelRatio = partialOptions.tilePixelRatio || 1;\n    const format = partialOptions.format || 'jpg';\n    const quality =\n      partialOptions.quality ||\n      (partialOptions.version == Versions.VERSION1 ? 'native' : 'default');\n    let resolutions = partialOptions.resolutions || [];\n    const supports = partialOptions.supports || [];\n    const extent = partialOptions.extent || [0, -height, width, 0];\n\n    const supportsListedSizes =\n      sizes != undefined && Array.isArray(sizes) && sizes.length > 0;\n    const supportsListedTiles =\n      tileSize !== undefined &&\n      ((typeof tileSize === 'number' &&\n        Number.isInteger(tileSize) &&\n        tileSize > 0) ||\n        (Array.isArray(tileSize) && tileSize.length > 0));\n    const supportsArbitraryTiling =\n      supports != undefined &&\n      Array.isArray(supports) &&\n      (supports.includes('regionByPx') || supports.includes('regionByPct')) &&\n      (supports.includes('sizeByWh') ||\n        supports.includes('sizeByH') ||\n        supports.includes('sizeByW') ||\n        supports.includes('sizeByPct'));\n\n    let tileWidth, tileHeight, maxZoom;\n\n    resolutions.sort(function (a, b) {\n      return b - a;\n    });\n\n    if (supportsListedTiles || supportsArbitraryTiling) {\n      if (tileSize != undefined) {\n        if (\n          typeof tileSize === 'number' &&\n          Number.isInteger(tileSize) &&\n          tileSize > 0\n        ) {\n          tileWidth = tileSize;\n          tileHeight = tileSize;\n        } else if (Array.isArray(tileSize) && tileSize.length > 0) {\n          if (\n            tileSize.length == 1 ||\n            (tileSize[1] == undefined && Number.isInteger(tileSize[0]))\n          ) {\n            tileWidth = tileSize[0];\n            tileHeight = tileSize[0];\n          }\n          if (tileSize.length == 2) {\n            if (\n              Number.isInteger(tileSize[0]) &&\n              Number.isInteger(tileSize[1])\n            ) {\n              tileWidth = tileSize[0];\n              tileHeight = tileSize[1];\n            } else if (\n              tileSize[0] == undefined &&\n              Number.isInteger(tileSize[1])\n            ) {\n              tileWidth = tileSize[1];\n              tileHeight = tileSize[1];\n            }\n          }\n        }\n      }\n      if (tileWidth === undefined || tileHeight === undefined) {\n        tileWidth = DEFAULT_TILE_SIZE;\n        tileHeight = DEFAULT_TILE_SIZE;\n      }\n      if (resolutions.length == 0) {\n        maxZoom = Math.max(\n          Math.ceil(Math.log(width / tileWidth) / Math.LN2),\n          Math.ceil(Math.log(height / tileHeight) / Math.LN2)\n        );\n        for (let i = maxZoom; i >= 0; i--) {\n          resolutions.push(Math.pow(2, i));\n        }\n      } else {\n        const maxScaleFactor = Math.max(...resolutions);\n        // TODO maxScaleFactor might not be a power to 2\n        maxZoom = Math.round(Math.log(maxScaleFactor) / Math.LN2);\n      }\n    } else {\n      // No tile support.\n      tileWidth = width;\n      tileHeight = height;\n      resolutions = [];\n      if (supportsListedSizes) {\n        /*\n         * 'sizes' provided. Use full region in different resolutions. Every\n         * resolution has only one tile.\n         */\n        sizes.sort(function (a, b) {\n          return a[0] - b[0];\n        });\n        maxZoom = -1;\n        const ignoredSizesIndex = [];\n        for (let i = 0; i < sizes.length; i++) {\n          const resolution = width / sizes[i][0];\n          if (\n            resolutions.length > 0 &&\n            resolutions[resolutions.length - 1] == resolution\n          ) {\n            ignoredSizesIndex.push(i);\n            continue;\n          }\n          resolutions.push(resolution);\n          maxZoom++;\n        }\n        if (ignoredSizesIndex.length > 0) {\n          for (let i = 0; i < ignoredSizesIndex.length; i++) {\n            sizes.splice(ignoredSizesIndex[i] - i, 1);\n          }\n        }\n      } else {\n        // No useful image information at all. Try pseudo tile with full image.\n        resolutions.push(1);\n        sizes.push([width, height]);\n        maxZoom = 0;\n      }\n    }\n\n    const tileGrid = new TileGrid({\n      tileSize: [tileWidth, tileHeight],\n      extent: extent,\n      origin: getTopLeft(extent),\n      resolutions: resolutions,\n    });\n\n    const tileUrlFunction = function (tileCoord, pixelRatio, projection) {\n      let regionParam, sizeParam;\n      const zoom = tileCoord[0];\n      if (zoom > maxZoom) {\n        return;\n      }\n      const tileX = tileCoord[1],\n        tileY = tileCoord[2],\n        scale = resolutions[zoom];\n      if (\n        tileX === undefined ||\n        tileY === undefined ||\n        scale === undefined ||\n        tileX < 0 ||\n        Math.ceil(width / scale / tileWidth) <= tileX ||\n        tileY < 0 ||\n        Math.ceil(height / scale / tileHeight) <= tileY\n      ) {\n        return;\n      }\n      if (supportsArbitraryTiling || supportsListedTiles) {\n        const regionX = tileX * tileWidth * scale,\n          regionY = tileY * tileHeight * scale;\n        let regionW = tileWidth * scale,\n          regionH = tileHeight * scale,\n          sizeW = tileWidth,\n          sizeH = tileHeight;\n        if (regionX + regionW > width) {\n          regionW = width - regionX;\n        }\n        if (regionY + regionH > height) {\n          regionH = height - regionY;\n        }\n        if (regionX + tileWidth * scale > width) {\n          sizeW = Math.floor((width - regionX + scale - 1) / scale);\n        }\n        if (regionY + tileHeight * scale > height) {\n          sizeH = Math.floor((height - regionY + scale - 1) / scale);\n        }\n        if (\n          regionX == 0 &&\n          regionW == width &&\n          regionY == 0 &&\n          regionH == height\n        ) {\n          // canonical full image region parameter is 'full', not 'x,y,w,h'\n          regionParam = 'full';\n        } else if (\n          !supportsArbitraryTiling ||\n          supports.includes('regionByPx')\n        ) {\n          regionParam = regionX + ',' + regionY + ',' + regionW + ',' + regionH;\n        } else if (supports.includes('regionByPct')) {\n          const pctX = formatPercentage((regionX / width) * 100),\n            pctY = formatPercentage((regionY / height) * 100),\n            pctW = formatPercentage((regionW / width) * 100),\n            pctH = formatPercentage((regionH / height) * 100);\n          regionParam = 'pct:' + pctX + ',' + pctY + ',' + pctW + ',' + pctH;\n        }\n        if (\n          version == Versions.VERSION3 &&\n          (!supportsArbitraryTiling || supports.includes('sizeByWh'))\n        ) {\n          sizeParam = sizeW + ',' + sizeH;\n        } else if (!supportsArbitraryTiling || supports.includes('sizeByW')) {\n          sizeParam = sizeW + ',';\n        } else if (supports.includes('sizeByH')) {\n          sizeParam = ',' + sizeH;\n        } else if (supports.includes('sizeByWh')) {\n          sizeParam = sizeW + ',' + sizeH;\n        } else if (supports.includes('sizeByPct')) {\n          sizeParam = 'pct:' + formatPercentage(100 / scale);\n        }\n      } else {\n        regionParam = 'full';\n        if (supportsListedSizes) {\n          const regionWidth = sizes[zoom][0],\n            regionHeight = sizes[zoom][1];\n          if (version == Versions.VERSION3) {\n            if (regionWidth == width && regionHeight == height) {\n              sizeParam = 'max';\n            } else {\n              sizeParam = regionWidth + ',' + regionHeight;\n            }\n          } else {\n            if (regionWidth == width) {\n              sizeParam = 'full';\n            } else {\n              sizeParam = regionWidth + ',';\n            }\n          }\n        } else {\n          sizeParam = version == Versions.VERSION3 ? 'max' : 'full';\n        }\n      }\n      return (\n        baseUrl + regionParam + '/' + sizeParam + '/0/' + quality + '.' + format\n      );\n    };\n\n    const IiifTileClass = CustomTile.bind(\n      null,\n      toSize(tileSize || 256).map(function (size) {\n        return size * tilePixelRatio;\n      })\n    );\n\n    super({\n      attributions: partialOptions.attributions,\n      attributionsCollapsible: partialOptions.attributionsCollapsible,\n      cacheSize: partialOptions.cacheSize,\n      crossOrigin: partialOptions.crossOrigin,\n      interpolate: partialOptions.interpolate,\n      projection: partialOptions.projection,\n      reprojectionErrorThreshold: partialOptions.reprojectionErrorThreshold,\n      state: partialOptions.state,\n      tileClass: IiifTileClass,\n      tileGrid: tileGrid,\n      tilePixelRatio: partialOptions.tilePixelRatio,\n      tileUrlFunction: tileUrlFunction,\n      transition: partialOptions.transition,\n    });\n\n    /**\n     * @type {number|import(\"../array.js\").NearestDirectionFunction}\n     */\n    this.zDirection = partialOptions.zDirection;\n  }\n}\n\nexport default IIIF;\n","/**\n * @module ol/reproj/Image\n */\nimport {ERROR_THRESHOLD} from './common.js';\n\nimport EventType from '../events/EventType.js';\nimport ImageBase from '../ImageBase.js';\nimport ImageState from '../ImageState.js';\nimport Triangulation from './Triangulation.js';\nimport {\n  calculateSourceResolution,\n  render as renderReprojected,\n} from '../reproj.js';\nimport {\n  getCenter,\n  getHeight,\n  getIntersection,\n  getWidth,\n  isEmpty,\n} from '../extent.js';\nimport {listen, unlistenByKey} from '../events.js';\n\n/**\n * @typedef {function(import(\"../extent.js\").Extent, number, number) : import(\"../ImageBase.js\").default} FunctionType\n */\n\n/**\n * @classdesc\n * Class encapsulating single reprojected image.\n * See {@link module:ol/source/Image~ImageSource}.\n */\nclass ReprojImage extends ImageBase {\n  /**\n   * @param {import(\"../proj/Projection.js\").default} sourceProj Source projection (of the data).\n   * @param {import(\"../proj/Projection.js\").default} targetProj Target projection.\n   * @param {import(\"../extent.js\").Extent} targetExtent Target extent.\n   * @param {number} targetResolution Target resolution.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {FunctionType} getImageFunction\n   *     Function returning source images (extent, resolution, pixelRatio).\n   * @param {boolean} interpolate Use linear interpolation when resampling.\n   */\n  constructor(\n    sourceProj,\n    targetProj,\n    targetExtent,\n    targetResolution,\n    pixelRatio,\n    getImageFunction,\n    interpolate\n  ) {\n    let maxSourceExtent = sourceProj.getExtent();\n    if (maxSourceExtent && sourceProj.canWrapX()) {\n      maxSourceExtent = maxSourceExtent.slice();\n      maxSourceExtent[0] = -Infinity;\n      maxSourceExtent[2] = Infinity;\n    }\n    let maxTargetExtent = targetProj.getExtent();\n    if (maxTargetExtent && targetProj.canWrapX()) {\n      maxTargetExtent = maxTargetExtent.slice();\n      maxTargetExtent[0] = -Infinity;\n      maxTargetExtent[2] = Infinity;\n    }\n\n    const limitedTargetExtent = maxTargetExtent\n      ? getIntersection(targetExtent, maxTargetExtent)\n      : targetExtent;\n\n    const targetCenter = getCenter(limitedTargetExtent);\n    const sourceResolution = calculateSourceResolution(\n      sourceProj,\n      targetProj,\n      targetCenter,\n      targetResolution\n    );\n\n    const errorThresholdInPixels = ERROR_THRESHOLD;\n\n    const triangulation = new Triangulation(\n      sourceProj,\n      targetProj,\n      limitedTargetExtent,\n      maxSourceExtent,\n      sourceResolution * errorThresholdInPixels,\n      targetResolution\n    );\n\n    const sourceExtent = triangulation.calculateSourceExtent();\n    const sourceImage = isEmpty(sourceExtent)\n      ? null\n      : getImageFunction(sourceExtent, sourceResolution, pixelRatio);\n    const state = sourceImage ? ImageState.IDLE : ImageState.EMPTY;\n    const sourcePixelRatio = sourceImage ? sourceImage.getPixelRatio() : 1;\n\n    super(targetExtent, targetResolution, sourcePixelRatio, state);\n\n    /**\n     * @private\n     * @type {import(\"../proj/Projection.js\").default}\n     */\n    this.targetProj_ = targetProj;\n\n    /**\n     * @private\n     * @type {import(\"../extent.js\").Extent}\n     */\n    this.maxSourceExtent_ = maxSourceExtent;\n\n    /**\n     * @private\n     * @type {!import(\"./Triangulation.js\").default}\n     */\n    this.triangulation_ = triangulation;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.targetResolution_ = targetResolution;\n\n    /**\n     * @private\n     * @type {import(\"../extent.js\").Extent}\n     */\n    this.targetExtent_ = targetExtent;\n\n    /**\n     * @private\n     * @type {import(\"../ImageBase.js\").default}\n     */\n    this.sourceImage_ = sourceImage;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.sourcePixelRatio_ = sourcePixelRatio;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.interpolate_ = interpolate;\n\n    /**\n     * @private\n     * @type {HTMLCanvasElement}\n     */\n    this.canvas_ = null;\n\n    /**\n     * @private\n     * @type {?import(\"../events.js\").EventsKey}\n     */\n    this.sourceListenerKey_ = null;\n  }\n\n  /**\n   * Clean up.\n   */\n  disposeInternal() {\n    if (this.state == ImageState.LOADING) {\n      this.unlistenSource_();\n    }\n    super.disposeInternal();\n  }\n\n  /**\n   * @return {HTMLCanvasElement} Image.\n   */\n  getImage() {\n    return this.canvas_;\n  }\n\n  /**\n   * @return {import(\"../proj/Projection.js\").default} Projection.\n   */\n  getProjection() {\n    return this.targetProj_;\n  }\n\n  /**\n   * @private\n   */\n  reproject_() {\n    const sourceState = this.sourceImage_.getState();\n    if (sourceState == ImageState.LOADED) {\n      const width = getWidth(this.targetExtent_) / this.targetResolution_;\n      const height = getHeight(this.targetExtent_) / this.targetResolution_;\n\n      this.canvas_ = renderReprojected(\n        width,\n        height,\n        this.sourcePixelRatio_,\n        this.sourceImage_.getResolution(),\n        this.maxSourceExtent_,\n        this.targetResolution_,\n        this.targetExtent_,\n        this.triangulation_,\n        [\n          {\n            extent: this.sourceImage_.getExtent(),\n            image: this.sourceImage_.getImage(),\n          },\n        ],\n        0,\n        undefined,\n        this.interpolate_\n      );\n    }\n    this.state = sourceState;\n    this.changed();\n  }\n\n  /**\n   * Load not yet loaded URI.\n   */\n  load() {\n    if (this.state == ImageState.IDLE) {\n      this.state = ImageState.LOADING;\n      this.changed();\n\n      const sourceState = this.sourceImage_.getState();\n      if (sourceState == ImageState.LOADED || sourceState == ImageState.ERROR) {\n        this.reproject_();\n      } else {\n        this.sourceListenerKey_ = listen(\n          this.sourceImage_,\n          EventType.CHANGE,\n          function (e) {\n            const sourceState = this.sourceImage_.getState();\n            if (\n              sourceState == ImageState.LOADED ||\n              sourceState == ImageState.ERROR\n            ) {\n              this.unlistenSource_();\n              this.reproject_();\n            }\n          },\n          this\n        );\n        this.sourceImage_.load();\n      }\n    }\n  }\n\n  /**\n   * @private\n   */\n  unlistenSource_() {\n    unlistenByKey(\n      /** @type {!import(\"../events.js\").EventsKey} */ (this.sourceListenerKey_)\n    );\n    this.sourceListenerKey_ = null;\n  }\n}\n\nexport default ReprojImage;\n","/**\n * @module ol/source/Image\n */\nimport Event from '../events/Event.js';\nimport ImageState from '../ImageState.js';\nimport ReprojImage from '../reproj/Image.js';\nimport Source from './Source.js';\nimport {abstract} from '../util.js';\nimport {equals} from '../extent.js';\nimport {equivalent} from '../proj.js';\nimport {linearFindNearest} from '../array.js';\n\n/**\n * @enum {string}\n */\nexport const ImageSourceEventType = {\n  /**\n   * Triggered when an image starts loading.\n   * @event module:ol/source/Image.ImageSourceEvent#imageloadstart\n   * @api\n   */\n  IMAGELOADSTART: 'imageloadstart',\n\n  /**\n   * Triggered when an image finishes loading.\n   * @event module:ol/source/Image.ImageSourceEvent#imageloadend\n   * @api\n   */\n  IMAGELOADEND: 'imageloadend',\n\n  /**\n   * Triggered if image loading results in an error.\n   * @event module:ol/source/Image.ImageSourceEvent#imageloaderror\n   * @api\n   */\n  IMAGELOADERROR: 'imageloaderror',\n};\n\n/**\n * @typedef {'imageloadend'|'imageloaderror'|'imageloadstart'} ImageSourceEventTypes\n */\n\n/**\n * @classdesc\n * Events emitted by {@link module:ol/source/Image~ImageSource} instances are instances of this\n * type.\n */\nexport class ImageSourceEvent extends Event {\n  /**\n   * @param {string} type Type.\n   * @param {import(\"../Image.js\").default} image The image.\n   */\n  constructor(type, image) {\n    super(type);\n\n    /**\n     * The image related to the event.\n     * @type {import(\"../Image.js\").default}\n     * @api\n     */\n    this.image = image;\n  }\n}\n\n/***\n * @template Return\n * @typedef {import(\"../Observable\").OnSignature<import(\"../Observable\").EventTypes, import(\"../events/Event.js\").default, Return> &\n *   import(\"../Observable\").OnSignature<import(\"../ObjectEventType\").Types, import(\"../Object\").ObjectEvent, Return> &\n *   import(\"../Observable\").OnSignature<ImageSourceEventTypes, ImageSourceEvent, Return> &\n *   import(\"../Observable\").CombinedOnSignature<import(\"../Observable\").EventTypes|import(\"../ObjectEventType\").Types\n *     |ImageSourceEventTypes, Return>} ImageSourceOnSignature\n */\n\n/**\n * @typedef {Object} Options\n * @property {import(\"./Source.js\").AttributionLike} [attributions] Attributions.\n * @property {boolean} [interpolate=true] Use interpolated values when resampling.  By default,\n * linear interpolation is used when resampling.  Set to false to use the nearest neighbor instead.\n * @property {import(\"../proj.js\").ProjectionLike} [projection] Projection.\n * @property {Array<number>} [resolutions] Resolutions.\n * @property {import(\"./Source.js\").State} [state] State.\n */\n\n/**\n * @classdesc\n * Abstract base class; normally only used for creating subclasses and not\n * instantiated in apps.\n * Base class for sources providing a single image.\n * @abstract\n * @fires module:ol/source/Image.ImageSourceEvent\n * @api\n */\nclass ImageSource extends Source {\n  /**\n   * @param {Options} options Single image source options.\n   */\n  constructor(options) {\n    super({\n      attributions: options.attributions,\n      projection: options.projection,\n      state: options.state,\n      interpolate:\n        options.interpolate !== undefined ? options.interpolate : true,\n    });\n\n    /***\n     * @type {ImageSourceOnSignature<import(\"../events\").EventsKey>}\n     */\n    this.on;\n\n    /***\n     * @type {ImageSourceOnSignature<import(\"../events\").EventsKey>}\n     */\n    this.once;\n\n    /***\n     * @type {ImageSourceOnSignature<void>}\n     */\n    this.un;\n\n    /**\n     * @private\n     * @type {Array<number>|null}\n     */\n    this.resolutions_ =\n      options.resolutions !== undefined ? options.resolutions : null;\n\n    /**\n     * @private\n     * @type {import(\"../reproj/Image.js\").default}\n     */\n    this.reprojectedImage_ = null;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.reprojectedRevision_ = 0;\n  }\n\n  /**\n   * @return {Array<number>|null} Resolutions.\n   */\n  getResolutions() {\n    return this.resolutions_;\n  }\n\n  /**\n   * @param {Array<number>|null} resolutions Resolutions.\n   */\n  setResolutions(resolutions) {\n    this.resolutions_ = resolutions;\n  }\n\n  /**\n   * @protected\n   * @param {number} resolution Resolution.\n   * @return {number} Resolution.\n   */\n  findNearestResolution(resolution) {\n    const resolutions = this.getResolutions();\n    if (resolutions) {\n      const idx = linearFindNearest(resolutions, resolution, 0);\n      resolution = resolutions[idx];\n    }\n    return resolution;\n  }\n\n  /**\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @param {number} resolution Resolution.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   * @return {import(\"../ImageBase.js\").default} Single image.\n   */\n  getImage(extent, resolution, pixelRatio, projection) {\n    const sourceProjection = this.getProjection();\n    if (\n      !sourceProjection ||\n      !projection ||\n      equivalent(sourceProjection, projection)\n    ) {\n      if (sourceProjection) {\n        projection = sourceProjection;\n      }\n      return this.getImageInternal(extent, resolution, pixelRatio, projection);\n    }\n    if (this.reprojectedImage_) {\n      if (\n        this.reprojectedRevision_ == this.getRevision() &&\n        equivalent(this.reprojectedImage_.getProjection(), projection) &&\n        this.reprojectedImage_.getResolution() == resolution &&\n        equals(this.reprojectedImage_.getExtent(), extent)\n      ) {\n        return this.reprojectedImage_;\n      }\n      this.reprojectedImage_.dispose();\n      this.reprojectedImage_ = null;\n    }\n\n    this.reprojectedImage_ = new ReprojImage(\n      sourceProjection,\n      projection,\n      extent,\n      resolution,\n      pixelRatio,\n      (extent, resolution, pixelRatio) =>\n        this.getImageInternal(extent, resolution, pixelRatio, sourceProjection),\n      this.getInterpolate()\n    );\n    this.reprojectedRevision_ = this.getRevision();\n\n    return this.reprojectedImage_;\n  }\n\n  /**\n   * @abstract\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @param {number} resolution Resolution.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   * @return {import(\"../ImageBase.js\").default} Single image.\n   * @protected\n   */\n  getImageInternal(extent, resolution, pixelRatio, projection) {\n    return abstract();\n  }\n\n  /**\n   * Handle image change events.\n   * @param {import(\"../events/Event.js\").default} event Event.\n   * @protected\n   */\n  handleImageChange(event) {\n    const image = /** @type {import(\"../Image.js\").default} */ (event.target);\n    let type;\n    switch (image.getState()) {\n      case ImageState.LOADING:\n        this.loading = true;\n        type = ImageSourceEventType.IMAGELOADSTART;\n        break;\n      case ImageState.LOADED:\n        this.loading = false;\n        type = ImageSourceEventType.IMAGELOADEND;\n        break;\n      case ImageState.ERROR:\n        this.loading = false;\n        type = ImageSourceEventType.IMAGELOADERROR;\n        break;\n      default:\n        return;\n    }\n    if (this.hasListener(type)) {\n      this.dispatchEvent(new ImageSourceEvent(type, image));\n    }\n  }\n}\n\n/**\n * Default image load function for image sources that use import(\"../Image.js\").Image image\n * instances.\n * @param {import(\"../Image.js\").default} image Image.\n * @param {string} src Source.\n */\nexport function defaultImageLoadFunction(image, src) {\n  /** @type {HTMLImageElement|HTMLVideoElement} */ (image.getImage()).src = src;\n}\n\nexport default ImageSource;\n","/**\n * @module ol/uri\n */\n\n/**\n * Appends query parameters to a URI.\n *\n * @param {string} uri The original URI, which may already have query data.\n * @param {!Object} params An object where keys are URI-encoded parameter keys,\n *     and the values are arbitrary types or arrays.\n * @return {string} The new URI.\n */\nexport function appendParams(uri, params) {\n  const keyParams = [];\n  // Skip any null or undefined parameter values\n  Object.keys(params).forEach(function (k) {\n    if (params[k] !== null && params[k] !== undefined) {\n      keyParams.push(k + '=' + encodeURIComponent(params[k]));\n    }\n  });\n  const qs = keyParams.join('&');\n  // remove any trailing ? or &\n  uri = uri.replace(/[?&]$/, '');\n  // append ? or & depending on whether uri has existing parameters\n  uri += uri.includes('?') ? '&' : '?';\n  return uri + qs;\n}\n","/**\n * @module ol/source/ImageArcGISRest\n */\n\nimport EventType from '../events/EventType.js';\nimport ImageSource, {defaultImageLoadFunction} from './Image.js';\nimport ImageWrapper from '../Image.js';\nimport {appendParams} from '../uri.js';\nimport {assert} from '../asserts.js';\nimport {containsExtent, getHeight, getWidth} from '../extent.js';\nimport {createCanvasContext2D} from '../dom.js';\n\n/**\n * @typedef {Object} Options\n * @property {import(\"./Source.js\").AttributionLike} [attributions] Attributions.\n * @property {null|string} [crossOrigin] The `crossOrigin` attribute for loaded images.  Note that\n * you must provide a `crossOrigin` value if you want to access pixel data with the Canvas renderer.\n * See https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image for more detail.\n * @property {boolean} [hidpi=true] Use the `ol/Map#pixelRatio` value when requesting the image from\n * the remote server.\n * @property {import(\"../Image.js\").LoadFunction} [imageLoadFunction] Optional function to load an image given\n * a URL.\n * @property {boolean} [interpolate=true] Use interpolated values when resampling.  By default,\n * linear interpolation is used when resampling.  Set to false to use the nearest neighbor instead.\n * @property {Object<string,*>} [params] ArcGIS Rest parameters. This field is optional. Service\n * defaults will be used for any fields not specified. `FORMAT` is `PNG32` by default. `F` is\n * `IMAGE` by default. `TRANSPARENT` is `true` by default.  `BBOX`, `SIZE`, `BBOXSR`, and `IMAGESR`\n * will be set dynamically. Set `LAYERS` to override the default service layer visibility. See\n * https://developers.arcgis.com/rest/services-reference/export-map.htm\n * for further reference.\n * @property {import(\"../proj.js\").ProjectionLike} [projection] Projection. Default is the view projection.\n * The projection code must contain a numeric end portion separated by :\n * or the entire code must form a valid ArcGIS SpatialReference definition.\n * @property {number} [ratio=1.5] Ratio. `1` means image requests are the size of the map viewport,\n * `2` means twice the size of the map viewport, and so on.\n * @property {Array<number>} [resolutions] Resolutions. If specified, requests will be made for\n * these resolutions only.\n * @property {string} [url] ArcGIS Rest service URL for a Map Service or Image Service. The url\n * should include /MapServer or /ImageServer.\n */\n\n/**\n * @classdesc\n * Source for data from ArcGIS Rest services providing single, untiled images.\n * Useful when underlying map service has labels.\n *\n * If underlying map service is not using labels,\n * take advantage of ol image caching and use\n * {@link module:ol/source/TileArcGISRest~TileArcGISRest} data source.\n *\n * @fires module:ol/source/Image.ImageSourceEvent\n * @api\n */\nclass ImageArcGISRest extends ImageSource {\n  /**\n   * @param {Options} [options] Image ArcGIS Rest Options.\n   */\n  constructor(options) {\n    options = options ? options : {};\n\n    super({\n      attributions: options.attributions,\n      interpolate: options.interpolate,\n      projection: options.projection,\n      resolutions: options.resolutions,\n    });\n\n    /**\n     * @private\n     * @type {CanvasRenderingContext2D}\n     */\n    this.context_ = createCanvasContext2D(1, 1);\n\n    /**\n     * @private\n     * @type {?string}\n     */\n    this.crossOrigin_ =\n      options.crossOrigin !== undefined ? options.crossOrigin : null;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.hidpi_ = options.hidpi !== undefined ? options.hidpi : true;\n\n    /**\n     * @private\n     * @type {string|undefined}\n     */\n    this.url_ = options.url;\n\n    /**\n     * @private\n     * @type {import(\"../Image.js\").LoadFunction}\n     */\n    this.imageLoadFunction_ =\n      options.imageLoadFunction !== undefined\n        ? options.imageLoadFunction\n        : defaultImageLoadFunction;\n\n    /**\n     * @private\n     * @type {!Object}\n     */\n    this.params_ = options.params || {};\n\n    /**\n     * @private\n     * @type {import(\"../Image.js\").default}\n     */\n    this.image_ = null;\n\n    /**\n     * @private\n     * @type {import(\"../size.js\").Size}\n     */\n    this.imageSize_ = [0, 0];\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.renderedRevision_ = 0;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.ratio_ = options.ratio !== undefined ? options.ratio : 1.5;\n  }\n\n  /**\n   * Get the user-provided params, i.e. those passed to the constructor through\n   * the \"params\" option, and possibly updated using the updateParams method.\n   * @return {Object} Params.\n   * @api\n   */\n  getParams() {\n    return this.params_;\n  }\n\n  /**\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @param {number} resolution Resolution.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   * @return {import(\"../Image.js\").default} Single image.\n   */\n  getImageInternal(extent, resolution, pixelRatio, projection) {\n    if (this.url_ === undefined) {\n      return null;\n    }\n\n    resolution = this.findNearestResolution(resolution);\n    pixelRatio = this.hidpi_ ? pixelRatio : 1;\n\n    const image = this.image_;\n    if (\n      image &&\n      this.renderedRevision_ == this.getRevision() &&\n      image.getResolution() == resolution &&\n      image.getPixelRatio() == pixelRatio &&\n      containsExtent(image.getExtent(), extent)\n    ) {\n      return image;\n    }\n\n    const params = {\n      'F': 'image',\n      'FORMAT': 'PNG32',\n      'TRANSPARENT': true,\n    };\n    Object.assign(params, this.params_);\n\n    extent = extent.slice();\n    const centerX = (extent[0] + extent[2]) / 2;\n    const centerY = (extent[1] + extent[3]) / 2;\n    if (this.ratio_ != 1) {\n      const halfWidth = (this.ratio_ * getWidth(extent)) / 2;\n      const halfHeight = (this.ratio_ * getHeight(extent)) / 2;\n      extent[0] = centerX - halfWidth;\n      extent[1] = centerY - halfHeight;\n      extent[2] = centerX + halfWidth;\n      extent[3] = centerY + halfHeight;\n    }\n\n    const imageResolution = resolution / pixelRatio;\n\n    // Compute an integer width and height.\n    const width = Math.ceil(getWidth(extent) / imageResolution);\n    const height = Math.ceil(getHeight(extent) / imageResolution);\n\n    // Modify the extent to match the integer width and height.\n    extent[0] = centerX - (imageResolution * width) / 2;\n    extent[2] = centerX + (imageResolution * width) / 2;\n    extent[1] = centerY - (imageResolution * height) / 2;\n    extent[3] = centerY + (imageResolution * height) / 2;\n\n    this.imageSize_[0] = width;\n    this.imageSize_[1] = height;\n\n    const url = this.getRequestUrl_(\n      extent,\n      this.imageSize_,\n      pixelRatio,\n      projection,\n      params\n    );\n\n    this.image_ = new ImageWrapper(\n      extent,\n      resolution,\n      pixelRatio,\n      url,\n      this.crossOrigin_,\n      this.imageLoadFunction_,\n      this.context_\n    );\n\n    this.renderedRevision_ = this.getRevision();\n\n    this.image_.addEventListener(\n      EventType.CHANGE,\n      this.handleImageChange.bind(this)\n    );\n\n    return this.image_;\n  }\n\n  /**\n   * Return the image load function of the source.\n   * @return {import(\"../Image.js\").LoadFunction} The image load function.\n   * @api\n   */\n  getImageLoadFunction() {\n    return this.imageLoadFunction_;\n  }\n\n  /**\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @param {import(\"../size.js\").Size} size Size.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   * @param {Object} params Params.\n   * @return {string} Request URL.\n   * @private\n   */\n  getRequestUrl_(extent, size, pixelRatio, projection, params) {\n    // ArcGIS Server only wants the numeric portion of the projection ID.\n    // (if there is no numeric portion the entire projection code must\n    // form a valid ArcGIS SpatialReference definition).\n    const srid = projection\n      .getCode()\n      .split(/:(?=\\d+$)/)\n      .pop();\n\n    params['SIZE'] = size[0] + ',' + size[1];\n    params['BBOX'] = extent.join(',');\n    params['BBOXSR'] = srid;\n    params['IMAGESR'] = srid;\n    params['DPI'] = Math.round(90 * pixelRatio);\n\n    const url = this.url_;\n\n    const modifiedUrl = url\n      .replace(/MapServer\\/?$/, 'MapServer/export')\n      .replace(/ImageServer\\/?$/, 'ImageServer/exportImage');\n    if (modifiedUrl == url) {\n      assert(false, 50); // `options.featureTypes` should be an Array\n    }\n    return appendParams(modifiedUrl, params);\n  }\n\n  /**\n   * Return the URL used for this ArcGIS source.\n   * @return {string|undefined} URL.\n   * @api\n   */\n  getUrl() {\n    return this.url_;\n  }\n\n  /**\n   * Set the image load function of the source.\n   * @param {import(\"../Image.js\").LoadFunction} imageLoadFunction Image load function.\n   * @api\n   */\n  setImageLoadFunction(imageLoadFunction) {\n    this.image_ = null;\n    this.imageLoadFunction_ = imageLoadFunction;\n    this.changed();\n  }\n\n  /**\n   * Set the URL to use for requests.\n   * @param {string|undefined} url URL.\n   * @api\n   */\n  setUrl(url) {\n    if (url != this.url_) {\n      this.url_ = url;\n      this.image_ = null;\n      this.changed();\n    }\n  }\n\n  /**\n   * Update the user-provided params.\n   * @param {Object} params Params.\n   * @api\n   */\n  updateParams(params) {\n    Object.assign(this.params_, params);\n    this.image_ = null;\n    this.changed();\n  }\n}\n\nexport default ImageArcGISRest;\n","/**\n * @module ol/source/ImageCanvas\n */\n\nimport ImageCanvas from '../ImageCanvas.js';\nimport ImageSource from './Image.js';\nimport {\n  containsExtent,\n  getHeight,\n  getWidth,\n  scaleFromCenter,\n} from '../extent.js';\n\n/**\n * A function returning the canvas element (`{HTMLCanvasElement}`)\n * used by the source as an image. The arguments passed to the function are:\n * {@link module:ol/extent~Extent} the image extent, `{number}` the image resolution,\n * `{number}` the pixel ratio of the map, {@link module:ol/size~Size} the image size,\n * and {@link module:ol/proj/Projection~Projection} the image projection. The canvas returned by\n * this function is cached by the source. The this keyword inside the function\n * references the {@link module:ol/source/ImageCanvas~ImageCanvasSource}.\n *\n * @typedef {function(this:import(\"../ImageCanvas.js\").default, import(\"../extent.js\").Extent, number,\n *     number, import(\"../size.js\").Size, import(\"../proj/Projection.js\").default): HTMLCanvasElement} FunctionType\n */\n\n/**\n * @typedef {Object} Options\n * @property {import(\"./Source.js\").AttributionLike} [attributions] Attributions.\n * @property {FunctionType} [canvasFunction] Canvas function.\n * The function returning the canvas element used by the source\n * as an image. The arguments passed to the function are: {@link import(\"../extent.js\").Extent} the\n * image extent, `{number}` the image resolution, `{number}` the pixel ratio of the map,\n * {@link import(\"../size.js\").Size} the image size, and {@link import(\"../proj/Projection.js\").default} the image\n * projection. The canvas returned by this function is cached by the source. If\n * the value returned by the function is later changed then\n * `changed` should be called on the source for the source to\n * invalidate the current cached image. See: {@link module:ol/Observable~Observable#changed}\n * @property {boolean} [interpolate=true] Use interpolated values when resampling.  By default,\n * linear interpolation is used when resampling.  Set to false to use the nearest neighbor instead.\n * @property {import(\"../proj.js\").ProjectionLike} [projection] Projection. Default is the view projection.\n * @property {number} [ratio=1.5] Ratio. 1 means canvases are the size of the map viewport, 2 means twice the\n * width and height of the map viewport, and so on. Must be `1` or higher.\n * @property {Array<number>} [resolutions] Resolutions.\n * If specified, new canvases will be created for these resolutions\n * @property {import(\"./Source.js\").State} [state] Source state.\n */\n\n/**\n * @classdesc\n * Base class for image sources where a canvas element is the image.\n * @api\n */\nclass ImageCanvasSource extends ImageSource {\n  /**\n   * @param {Options} [options] ImageCanvas options.\n   */\n  constructor(options) {\n    options = options ? options : {};\n\n    super({\n      attributions: options.attributions,\n      interpolate: options.interpolate,\n      projection: options.projection,\n      resolutions: options.resolutions,\n      state: options.state,\n    });\n\n    /**\n     * @private\n     * @type {FunctionType}\n     */\n    this.canvasFunction_ = options.canvasFunction;\n\n    /**\n     * @private\n     * @type {import(\"../ImageCanvas.js\").default}\n     */\n    this.canvas_ = null;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.renderedRevision_ = 0;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.ratio_ = options.ratio !== undefined ? options.ratio : 1.5;\n  }\n\n  /**\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @param {number} resolution Resolution.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   * @return {import(\"../ImageCanvas.js\").default} Single image.\n   */\n  getImageInternal(extent, resolution, pixelRatio, projection) {\n    resolution = this.findNearestResolution(resolution);\n\n    let canvas = this.canvas_;\n    if (\n      canvas &&\n      this.renderedRevision_ == this.getRevision() &&\n      canvas.getResolution() == resolution &&\n      canvas.getPixelRatio() == pixelRatio &&\n      containsExtent(canvas.getExtent(), extent)\n    ) {\n      return canvas;\n    }\n\n    extent = extent.slice();\n    scaleFromCenter(extent, this.ratio_);\n    const width = getWidth(extent) / resolution;\n    const height = getHeight(extent) / resolution;\n    const size = [width * pixelRatio, height * pixelRatio];\n\n    const canvasElement = this.canvasFunction_.call(\n      this,\n      extent,\n      resolution,\n      pixelRatio,\n      size,\n      projection\n    );\n    if (canvasElement) {\n      canvas = new ImageCanvas(extent, resolution, pixelRatio, canvasElement);\n    }\n    this.canvas_ = canvas;\n    this.renderedRevision_ = this.getRevision();\n\n    return canvas;\n  }\n}\n\nexport default ImageCanvasSource;\n","/**\n * @module ol/source/ImageMapGuide\n */\n\nimport EventType from '../events/EventType.js';\nimport ImageSource, {defaultImageLoadFunction} from './Image.js';\nimport ImageWrapper from '../Image.js';\nimport {appendParams} from '../uri.js';\nimport {\n  containsExtent,\n  getCenter,\n  getHeight,\n  getWidth,\n  scaleFromCenter,\n} from '../extent.js';\nimport {createCanvasContext2D} from '../dom.js';\n\n/**\n * @typedef {Object} Options\n * @property {string} [url] The mapagent url.\n * @property {null|string} [crossOrigin] The `crossOrigin` attribute for loaded images.  Note that\n * you must provide a `crossOrigin` value if you want to access pixel data with the Canvas renderer.\n * See https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image for more detail.\n * @property {number} [displayDpi=96] The display resolution.\n * @property {number} [metersPerUnit=1] The meters-per-unit value.\n * @property {boolean} [hidpi=true] Use the `ol/Map#pixelRatio` value when requesting\n * the image from the remote server.\n * @property {boolean} [useOverlay] If `true`, will use `GETDYNAMICMAPOVERLAYIMAGE`.\n * @property {import(\"../proj.js\").ProjectionLike} [projection] Projection. Default is the view projection.\n * @property {number} [ratio=1] Ratio. `1` means image requests are the size of the map viewport, `2` means\n * twice the width and height of the map viewport, and so on. Must be `1` or higher.\n * @property {Array<number>} [resolutions] Resolutions.\n * If specified, requests will be made for these resolutions only.\n * @property {import(\"../Image.js\").LoadFunction} [imageLoadFunction] Optional function to load an image given a URL.\n * @property {boolean} [interpolate=true] Use interpolated values when resampling.  By default,\n * linear interpolation is used when resampling.  Set to false to use the nearest neighbor instead.\n * @property {Object} [params] Additional parameters.\n */\n\n/**\n * @classdesc\n * Source for images from Mapguide servers\n *\n * @fires module:ol/source/Image.ImageSourceEvent\n * @api\n */\nclass ImageMapGuide extends ImageSource {\n  /**\n   * @param {Options} options ImageMapGuide options.\n   */\n  constructor(options) {\n    super({\n      interpolate: options.interpolate,\n      projection: options.projection,\n      resolutions: options.resolutions,\n    });\n\n    /**\n     * @private\n     * @type {CanvasRenderingContext2D}\n     */\n    this.context_ = createCanvasContext2D(1, 1);\n\n    /**\n     * @private\n     * @type {?string}\n     */\n    this.crossOrigin_ =\n      options.crossOrigin !== undefined ? options.crossOrigin : null;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.displayDpi_ =\n      options.displayDpi !== undefined ? options.displayDpi : 96;\n\n    /**\n     * @private\n     * @type {!Object}\n     */\n    this.params_ = options.params || {};\n\n    /**\n     * @private\n     * @type {string|undefined}\n     */\n    this.url_ = options.url;\n\n    /**\n     * @private\n     * @type {import(\"../Image.js\").LoadFunction}\n     */\n    this.imageLoadFunction_ =\n      options.imageLoadFunction !== undefined\n        ? options.imageLoadFunction\n        : defaultImageLoadFunction;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.hidpi_ = options.hidpi !== undefined ? options.hidpi : true;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.metersPerUnit_ =\n      options.metersPerUnit !== undefined ? options.metersPerUnit : 1;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.ratio_ = options.ratio !== undefined ? options.ratio : 1;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.useOverlay_ =\n      options.useOverlay !== undefined ? options.useOverlay : false;\n\n    /**\n     * @private\n     * @type {import(\"../Image.js\").default}\n     */\n    this.image_ = null;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.renderedRevision_ = 0;\n  }\n\n  /**\n   * Get the user-provided params, i.e. those passed to the constructor through\n   * the \"params\" option, and possibly updated using the updateParams method.\n   * @return {Object} Params.\n   * @api\n   */\n  getParams() {\n    return this.params_;\n  }\n\n  /**\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @param {number} resolution Resolution.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   * @return {import(\"../Image.js\").default} Single image.\n   */\n  getImageInternal(extent, resolution, pixelRatio, projection) {\n    resolution = this.findNearestResolution(resolution);\n    pixelRatio = this.hidpi_ ? pixelRatio : 1;\n\n    let image = this.image_;\n    if (\n      image &&\n      this.renderedRevision_ == this.getRevision() &&\n      image.getResolution() == resolution &&\n      image.getPixelRatio() == pixelRatio &&\n      containsExtent(image.getExtent(), extent)\n    ) {\n      return image;\n    }\n\n    if (this.ratio_ != 1) {\n      extent = extent.slice();\n      scaleFromCenter(extent, this.ratio_);\n    }\n    const width = getWidth(extent) / resolution;\n    const height = getHeight(extent) / resolution;\n    const size = [width * pixelRatio, height * pixelRatio];\n\n    if (this.url_ !== undefined) {\n      const imageUrl = this.getUrl(\n        this.url_,\n        this.params_,\n        extent,\n        size,\n        projection\n      );\n      image = new ImageWrapper(\n        extent,\n        resolution,\n        pixelRatio,\n        imageUrl,\n        this.crossOrigin_,\n        this.imageLoadFunction_,\n        this.context_\n      );\n      image.addEventListener(\n        EventType.CHANGE,\n        this.handleImageChange.bind(this)\n      );\n    } else {\n      image = null;\n    }\n    this.image_ = image;\n    this.renderedRevision_ = this.getRevision();\n\n    return image;\n  }\n\n  /**\n   * Return the image load function of the source.\n   * @return {import(\"../Image.js\").LoadFunction} The image load function.\n   * @api\n   */\n  getImageLoadFunction() {\n    return this.imageLoadFunction_;\n  }\n\n  /**\n   * Update the user-provided params.\n   * @param {Object} params Params.\n   * @api\n   */\n  updateParams(params) {\n    Object.assign(this.params_, params);\n    this.changed();\n  }\n\n  /**\n   * @param {string} baseUrl The mapagent url.\n   * @param {Object<string, string|number>} params Request parameters.\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @param {import(\"../size.js\").Size} size Size.\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   * @return {string} The mapagent map image request URL.\n   */\n  getUrl(baseUrl, params, extent, size, projection) {\n    const scale = getScale(extent, size, this.metersPerUnit_, this.displayDpi_);\n    const center = getCenter(extent);\n    const baseParams = {\n      'OPERATION': this.useOverlay_\n        ? 'GETDYNAMICMAPOVERLAYIMAGE'\n        : 'GETMAPIMAGE',\n      'VERSION': '2.0.0',\n      'LOCALE': 'en',\n      'CLIENTAGENT': 'ol/source/ImageMapGuide source',\n      'CLIP': '1',\n      'SETDISPLAYDPI': this.displayDpi_,\n      'SETDISPLAYWIDTH': Math.round(size[0]),\n      'SETDISPLAYHEIGHT': Math.round(size[1]),\n      'SETVIEWSCALE': scale,\n      'SETVIEWCENTERX': center[0],\n      'SETVIEWCENTERY': center[1],\n    };\n    Object.assign(baseParams, params);\n    return appendParams(baseUrl, baseParams);\n  }\n\n  /**\n   * Set the image load function of the MapGuide source.\n   * @param {import(\"../Image.js\").LoadFunction} imageLoadFunction Image load function.\n   * @api\n   */\n  setImageLoadFunction(imageLoadFunction) {\n    this.image_ = null;\n    this.imageLoadFunction_ = imageLoadFunction;\n    this.changed();\n  }\n}\n\n/**\n * @param {import(\"../extent.js\").Extent} extent The map extents.\n * @param {import(\"../size.js\").Size} size The viewport size.\n * @param {number} metersPerUnit The meters-per-unit value.\n * @param {number} dpi The display resolution.\n * @return {number} The computed map scale.\n */\nfunction getScale(extent, size, metersPerUnit, dpi) {\n  const mcsW = getWidth(extent);\n  const mcsH = getHeight(extent);\n  const devW = size[0];\n  const devH = size[1];\n  const mpp = 0.0254 / dpi;\n  if (devH * mcsW > devW * mcsH) {\n    return (mcsW * metersPerUnit) / (devW * mpp); // width limited\n  }\n  return (mcsH * metersPerUnit) / (devH * mpp); // height limited\n}\n\nexport default ImageMapGuide;\n","/**\n * @module ol/source/ImageStatic\n */\n\nimport EventType from '../events/EventType.js';\nimport ImageSource, {defaultImageLoadFunction} from './Image.js';\nimport ImageState from '../ImageState.js';\nimport ImageWrapper from '../Image.js';\nimport {createCanvasContext2D} from '../dom.js';\nimport {getHeight, getWidth, intersects} from '../extent.js';\nimport {get as getProjection} from '../proj.js';\n\n/**\n * @typedef {Object} Options\n * @property {import(\"./Source.js\").AttributionLike} [attributions] Attributions.\n * @property {null|string} [crossOrigin] The `crossOrigin` attribute for loaded images.  Note that\n * you must provide a `crossOrigin` value if you want to access pixel data with the Canvas renderer.\n * See https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image for more detail.\n * @property {import(\"../extent.js\").Extent} [imageExtent] Extent of the image in map coordinates.\n * This is the [left, bottom, right, top] map coordinates of your image.\n * @property {import(\"../Image.js\").LoadFunction} [imageLoadFunction] Optional function to load an image given a URL.\n * @property {boolean} [interpolate=true] Use interpolated values when resampling.  By default,\n * linear interpolation is used when resampling.  Set to false to use the nearest neighbor instead.\n * @property {import(\"../proj.js\").ProjectionLike} [projection] Projection. Default is the view projection.\n * @property {import(\"../size.js\").Size} [imageSize] Size of the image in pixels. Usually the image size is auto-detected, so this\n * only needs to be set if auto-detection fails for some reason.\n * @property {string} url Image URL.\n */\n\n/**\n * @classdesc\n * A layer source for displaying a single, static image.\n * @api\n */\nclass Static extends ImageSource {\n  /**\n   * @param {Options} options ImageStatic options.\n   */\n  constructor(options) {\n    const crossOrigin =\n      options.crossOrigin !== undefined ? options.crossOrigin : null;\n\n    const /** @type {import(\"../Image.js\").LoadFunction} */ imageLoadFunction =\n        options.imageLoadFunction !== undefined\n          ? options.imageLoadFunction\n          : defaultImageLoadFunction;\n\n    super({\n      attributions: options.attributions,\n      interpolate: options.interpolate,\n      projection: getProjection(options.projection),\n    });\n\n    /**\n     * @private\n     * @type {string}\n     */\n    this.url_ = options.url;\n\n    /**\n     * @private\n     * @type {import(\"../extent.js\").Extent}\n     */\n    this.imageExtent_ = options.imageExtent;\n\n    /**\n     * @private\n     * @type {import(\"../Image.js\").default}\n     */\n    this.image_ = new ImageWrapper(\n      this.imageExtent_,\n      undefined,\n      1,\n      this.url_,\n      crossOrigin,\n      imageLoadFunction,\n      createCanvasContext2D(1, 1)\n    );\n\n    /**\n     * @private\n     * @type {import(\"../size.js\").Size|null}\n     */\n    this.imageSize_ = options.imageSize ? options.imageSize : null;\n\n    this.image_.addEventListener(\n      EventType.CHANGE,\n      this.handleImageChange.bind(this)\n    );\n  }\n\n  /**\n   * Returns the image extent\n   * @return {import(\"../extent.js\").Extent} image extent.\n   * @api\n   */\n  getImageExtent() {\n    return this.imageExtent_;\n  }\n\n  /**\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @param {number} resolution Resolution.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   * @return {import(\"../Image.js\").default} Single image.\n   */\n  getImageInternal(extent, resolution, pixelRatio, projection) {\n    if (intersects(extent, this.image_.getExtent())) {\n      return this.image_;\n    }\n    return null;\n  }\n\n  /**\n   * Return the URL used for this image source.\n   * @return {string} URL.\n   * @api\n   */\n  getUrl() {\n    return this.url_;\n  }\n\n  /**\n   * @param {import(\"../events/Event.js\").default} evt Event.\n   */\n  handleImageChange(evt) {\n    if (this.image_.getState() == ImageState.LOADED) {\n      const imageExtent = this.image_.getExtent();\n      const image = this.image_.getImage();\n      let imageWidth, imageHeight;\n      if (this.imageSize_) {\n        imageWidth = this.imageSize_[0];\n        imageHeight = this.imageSize_[1];\n      } else {\n        imageWidth = image.width;\n        imageHeight = image.height;\n      }\n      const extentWidth = getWidth(imageExtent);\n      const extentHeight = getHeight(imageExtent);\n      const xResolution = extentWidth / imageWidth;\n      const yResolution = extentHeight / imageHeight;\n      let targetWidth = imageWidth;\n      let targetHeight = imageHeight;\n      if (xResolution > yResolution) {\n        targetWidth = Math.round(extentWidth / yResolution);\n      } else {\n        targetHeight = Math.round(extentHeight / xResolution);\n      }\n      if (targetWidth !== imageWidth || targetHeight !== imageHeight) {\n        const context = createCanvasContext2D(targetWidth, targetHeight);\n        if (!this.getInterpolate()) {\n          context.imageSmoothingEnabled = false;\n        }\n        const canvas = context.canvas;\n        context.drawImage(\n          image,\n          0,\n          0,\n          imageWidth,\n          imageHeight,\n          0,\n          0,\n          canvas.width,\n          canvas.height\n        );\n        this.image_.setImage(canvas);\n      }\n    }\n    super.handleImageChange(evt);\n  }\n}\n\nexport default Static;\n","/**\n * @module ol/source/wms\n */\n\n/**\n * Default WMS version.\n * @type {string}\n */\nexport const DEFAULT_VERSION = '1.3.0';\n\n/**\n * @api\n * @typedef {'carmentaserver' | 'geoserver' | 'mapserver' | 'qgis'} ServerType\n * Set the server type to use implementation-specific parameters beyond the WMS specification.\n *  - `'carmentaserver'`: HiDPI support for [Carmenta Server](https://www.carmenta.com/en/products/carmenta-server)\n *  - `'geoserver'`: HiDPI support for [GeoServer](https://geoserver.org/)\n *  - `'mapserver'`: HiDPI support for [MapServer](https://mapserver.org/)\n *  - `'qgis'`: HiDPI support for [QGIS](https://qgis.org/)\n */\n","/**\n * @module ol/source/ImageWMS\n */\n\nimport EventType from '../events/EventType.js';\nimport ImageSource, {defaultImageLoadFunction} from './Image.js';\nimport ImageWrapper from '../Image.js';\nimport {DEFAULT_VERSION} from './wms.js';\nimport {appendParams} from '../uri.js';\nimport {assert} from '../asserts.js';\nimport {calculateSourceResolution} from '../reproj.js';\nimport {ceil, floor, round} from '../math.js';\nimport {compareVersions} from '../string.js';\nimport {\n  containsExtent,\n  getCenter,\n  getForViewAndSize,\n  getHeight,\n  getWidth,\n} from '../extent.js';\nimport {createCanvasContext2D} from '../dom.js';\nimport {get as getProjection, transform} from '../proj.js';\n\n/**\n * Number of decimal digits to consider in integer values when rounding.\n * @type {number}\n */\nconst DECIMALS = 4;\n\n/**\n * @const\n * @type {import(\"../size.js\").Size}\n */\nconst GETFEATUREINFO_IMAGE_SIZE = [101, 101];\n\n/**\n * @typedef {Object} Options\n * @property {import(\"./Source.js\").AttributionLike} [attributions] Attributions.\n * @property {null|string} [crossOrigin] The `crossOrigin` attribute for loaded images.  Note that\n * you must provide a `crossOrigin` value if you want to access pixel data with the Canvas renderer.\n * See https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image for more detail.\n * @property {boolean} [hidpi=true] Use the `ol/Map#pixelRatio` value when requesting\n * the image from the remote server.\n * @property {import(\"./wms.js\").ServerType} [serverType] The type of\n * the remote WMS server: `mapserver`, `geoserver`, `carmentaserver`, or `qgis`.\n * Only needed if `hidpi` is `true`.\n * @property {import(\"../Image.js\").LoadFunction} [imageLoadFunction] Optional function to load an image given a URL.\n * @property {boolean} [interpolate=true] Use interpolated values when resampling.  By default,\n * linear interpolation is used when resampling.  Set to false to use the nearest neighbor instead.\n * @property {Object<string,*>} [params] WMS request parameters.\n * At least a `LAYERS` param is required. `STYLES` is\n * `''` by default. `VERSION` is `1.3.0` by default. `WIDTH`, `HEIGHT`, `BBOX`\n * and `CRS` (`SRS` for WMS version < 1.3.0) will be set dynamically.\n * @property {import(\"../proj.js\").ProjectionLike} [projection] Projection. Default is the view projection.\n * @property {number} [ratio=1.5] Ratio. `1` means image requests are the size of the map viewport, `2` means\n * twice the width and height of the map viewport, and so on. Must be `1` or\n * higher.\n * @property {Array<number>} [resolutions] Resolutions.\n * If specified, requests will be made for these resolutions only.\n * @property {string} [url] WMS service URL.\n */\n\n/**\n * @classdesc\n * Source for WMS servers providing single, untiled images.\n *\n * @fires module:ol/source/Image.ImageSourceEvent\n * @api\n */\nclass ImageWMS extends ImageSource {\n  /**\n   * @param {Options} [options] ImageWMS options.\n   */\n  constructor(options) {\n    options = options ? options : {};\n\n    super({\n      attributions: options.attributions,\n      interpolate: options.interpolate,\n      projection: options.projection,\n      resolutions: options.resolutions,\n    });\n\n    /**\n     * @private\n     * @type {CanvasRenderingContext2D}\n     */\n    this.context_ = createCanvasContext2D(1, 1);\n\n    /**\n     * @private\n     * @type {?string}\n     */\n    this.crossOrigin_ =\n      options.crossOrigin !== undefined ? options.crossOrigin : null;\n\n    /**\n     * @private\n     * @type {string|undefined}\n     */\n    this.url_ = options.url;\n\n    /**\n     * @private\n     * @type {import(\"../Image.js\").LoadFunction}\n     */\n    this.imageLoadFunction_ =\n      options.imageLoadFunction !== undefined\n        ? options.imageLoadFunction\n        : defaultImageLoadFunction;\n\n    /**\n     * @private\n     * @type {!Object}\n     */\n    this.params_ = Object.assign({}, options.params);\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.v13_ = true;\n    this.updateV13_();\n\n    /**\n     * @private\n     * @type {import(\"./wms.js\").ServerType}\n     */\n    this.serverType_ = options.serverType;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.hidpi_ = options.hidpi !== undefined ? options.hidpi : true;\n\n    /**\n     * @private\n     * @type {import(\"../Image.js\").default}\n     */\n    this.image_ = null;\n\n    /**\n     * @private\n     * @type {import(\"../size.js\").Size}\n     */\n    this.imageSize_ = [0, 0];\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.renderedRevision_ = 0;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.ratio_ = options.ratio !== undefined ? options.ratio : 1.5;\n  }\n\n  /**\n   * Return the GetFeatureInfo URL for the passed coordinate, resolution, and\n   * projection. Return `undefined` if the GetFeatureInfo URL cannot be\n   * constructed.\n   * @param {import(\"../coordinate.js\").Coordinate} coordinate Coordinate.\n   * @param {number} resolution Resolution.\n   * @param {import(\"../proj.js\").ProjectionLike} projection Projection.\n   * @param {!Object} params GetFeatureInfo params. `INFO_FORMAT` at least should\n   *     be provided. If `QUERY_LAYERS` is not provided then the layers specified\n   *     in the `LAYERS` parameter will be used. `VERSION` should not be\n   *     specified here.\n   * @return {string|undefined} GetFeatureInfo URL.\n   * @api\n   */\n  getFeatureInfoUrl(coordinate, resolution, projection, params) {\n    if (this.url_ === undefined) {\n      return undefined;\n    }\n    const projectionObj = getProjection(projection);\n    const sourceProjectionObj = this.getProjection();\n\n    if (sourceProjectionObj && sourceProjectionObj !== projectionObj) {\n      resolution = calculateSourceResolution(\n        sourceProjectionObj,\n        projectionObj,\n        coordinate,\n        resolution\n      );\n      coordinate = transform(coordinate, projectionObj, sourceProjectionObj);\n    }\n\n    const extent = getForViewAndSize(\n      coordinate,\n      resolution,\n      0,\n      GETFEATUREINFO_IMAGE_SIZE\n    );\n\n    const baseParams = {\n      'SERVICE': 'WMS',\n      'VERSION': DEFAULT_VERSION,\n      'REQUEST': 'GetFeatureInfo',\n      'FORMAT': 'image/png',\n      'TRANSPARENT': true,\n      'QUERY_LAYERS': this.params_['LAYERS'],\n    };\n    Object.assign(baseParams, this.params_, params);\n\n    const x = floor((coordinate[0] - extent[0]) / resolution, DECIMALS);\n    const y = floor((extent[3] - coordinate[1]) / resolution, DECIMALS);\n    baseParams[this.v13_ ? 'I' : 'X'] = x;\n    baseParams[this.v13_ ? 'J' : 'Y'] = y;\n\n    return this.getRequestUrl_(\n      extent,\n      GETFEATUREINFO_IMAGE_SIZE,\n      1,\n      sourceProjectionObj || projectionObj,\n      baseParams\n    );\n  }\n\n  /**\n   * Return the GetLegendGraphic URL, optionally optimized for the passed\n   * resolution and possibly including any passed specific parameters. Returns\n   * `undefined` if the GetLegendGraphic URL cannot be constructed.\n   *\n   * @param {number} [resolution] Resolution. If set to undefined, `SCALE`\n   *     will not be calculated and included in URL.\n   * @param {Object} [params] GetLegendGraphic params. If `LAYER` is set, the\n   *     request is generated for this wms layer, else it will try to use the\n   *     configured wms layer. Default `FORMAT` is `image/png`.\n   *     `VERSION` should not be specified here.\n   * @return {string|undefined} GetLegendGraphic URL.\n   * @api\n   */\n  getLegendUrl(resolution, params) {\n    if (this.url_ === undefined) {\n      return undefined;\n    }\n\n    const baseParams = {\n      'SERVICE': 'WMS',\n      'VERSION': DEFAULT_VERSION,\n      'REQUEST': 'GetLegendGraphic',\n      'FORMAT': 'image/png',\n    };\n\n    if (params === undefined || params['LAYER'] === undefined) {\n      const layers = this.params_.LAYERS;\n      const isSingleLayer = !Array.isArray(layers) || layers.length === 1;\n      if (!isSingleLayer) {\n        return undefined;\n      }\n      baseParams['LAYER'] = layers;\n    }\n\n    if (resolution !== undefined) {\n      const mpu = this.getProjection()\n        ? this.getProjection().getMetersPerUnit()\n        : 1;\n      const pixelSize = 0.00028;\n      baseParams['SCALE'] = (resolution * mpu) / pixelSize;\n    }\n\n    Object.assign(baseParams, params);\n\n    return appendParams(/** @type {string} */ (this.url_), baseParams);\n  }\n\n  /**\n   * Get the user-provided params, i.e. those passed to the constructor through\n   * the \"params\" option, and possibly updated using the updateParams method.\n   * @return {Object} Params.\n   * @api\n   */\n  getParams() {\n    return this.params_;\n  }\n\n  /**\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @param {number} resolution Resolution.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   * @return {import(\"../Image.js\").default} Single image.\n   */\n  getImageInternal(extent, resolution, pixelRatio, projection) {\n    if (this.url_ === undefined) {\n      return null;\n    }\n\n    resolution = this.findNearestResolution(resolution);\n\n    if (pixelRatio != 1 && (!this.hidpi_ || this.serverType_ === undefined)) {\n      pixelRatio = 1;\n    }\n\n    const imageResolution = resolution / pixelRatio;\n\n    const center = getCenter(extent);\n    const viewWidth = ceil(getWidth(extent) / imageResolution, DECIMALS);\n    const viewHeight = ceil(getHeight(extent) / imageResolution, DECIMALS);\n    const viewExtent = getForViewAndSize(center, imageResolution, 0, [\n      viewWidth,\n      viewHeight,\n    ]);\n    const marginWidth = ceil(((this.ratio_ - 1) * viewWidth) / 2, DECIMALS);\n    const requestWidth = viewWidth + 2 * marginWidth;\n    const marginHeight = ceil(((this.ratio_ - 1) * viewHeight) / 2, DECIMALS);\n    const requestHeight = viewHeight + 2 * marginHeight;\n    const requestExtent = getForViewAndSize(center, imageResolution, 0, [\n      requestWidth,\n      requestHeight,\n    ]);\n\n    const image = this.image_;\n    if (\n      image &&\n      this.renderedRevision_ == this.getRevision() &&\n      image.getResolution() == resolution &&\n      image.getPixelRatio() == pixelRatio &&\n      containsExtent(image.getExtent(), viewExtent)\n    ) {\n      return image;\n    }\n\n    const params = {\n      'SERVICE': 'WMS',\n      'VERSION': DEFAULT_VERSION,\n      'REQUEST': 'GetMap',\n      'FORMAT': 'image/png',\n      'TRANSPARENT': true,\n    };\n    Object.assign(params, this.params_);\n\n    this.imageSize_[0] = round(\n      getWidth(requestExtent) / imageResolution,\n      DECIMALS\n    );\n    this.imageSize_[1] = round(\n      getHeight(requestExtent) / imageResolution,\n      DECIMALS\n    );\n\n    const url = this.getRequestUrl_(\n      requestExtent,\n      this.imageSize_,\n      pixelRatio,\n      projection,\n      params\n    );\n\n    this.image_ = new ImageWrapper(\n      requestExtent,\n      resolution,\n      pixelRatio,\n      url,\n      this.crossOrigin_,\n      this.imageLoadFunction_,\n      this.context_\n    );\n\n    this.renderedRevision_ = this.getRevision();\n\n    this.image_.addEventListener(\n      EventType.CHANGE,\n      this.handleImageChange.bind(this)\n    );\n\n    return this.image_;\n  }\n\n  /**\n   * Return the image load function of the source.\n   * @return {import(\"../Image.js\").LoadFunction} The image load function.\n   * @api\n   */\n  getImageLoadFunction() {\n    return this.imageLoadFunction_;\n  }\n\n  /**\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @param {import(\"../size.js\").Size} size Size.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   * @param {Object} params Params.\n   * @return {string} Request URL.\n   * @private\n   */\n  getRequestUrl_(extent, size, pixelRatio, projection, params) {\n    assert(this.url_ !== undefined, 9); // `url` must be configured or set using `#setUrl()`\n\n    params[this.v13_ ? 'CRS' : 'SRS'] = projection.getCode();\n\n    if (!('STYLES' in this.params_)) {\n      params['STYLES'] = '';\n    }\n\n    if (pixelRatio != 1) {\n      switch (this.serverType_) {\n        case 'geoserver':\n          const dpi = (90 * pixelRatio + 0.5) | 0;\n          if ('FORMAT_OPTIONS' in params) {\n            params['FORMAT_OPTIONS'] += ';dpi:' + dpi;\n          } else {\n            params['FORMAT_OPTIONS'] = 'dpi:' + dpi;\n          }\n          break;\n        case 'mapserver':\n          params['MAP_RESOLUTION'] = 90 * pixelRatio;\n          break;\n        case 'carmentaserver':\n        case 'qgis':\n          params['DPI'] = 90 * pixelRatio;\n          break;\n        default: // Unknown `serverType` configured\n          assert(false, 8);\n          break;\n      }\n    }\n\n    params['WIDTH'] = size[0];\n    params['HEIGHT'] = size[1];\n\n    const axisOrientation = projection.getAxisOrientation();\n    let bbox;\n    if (this.v13_ && axisOrientation.substr(0, 2) == 'ne') {\n      bbox = [extent[1], extent[0], extent[3], extent[2]];\n    } else {\n      bbox = extent;\n    }\n    params['BBOX'] = bbox.join(',');\n\n    return appendParams(/** @type {string} */ (this.url_), params);\n  }\n\n  /**\n   * Return the URL used for this WMS source.\n   * @return {string|undefined} URL.\n   * @api\n   */\n  getUrl() {\n    return this.url_;\n  }\n\n  /**\n   * Set the image load function of the source.\n   * @param {import(\"../Image.js\").LoadFunction} imageLoadFunction Image load function.\n   * @api\n   */\n  setImageLoadFunction(imageLoadFunction) {\n    this.image_ = null;\n    this.imageLoadFunction_ = imageLoadFunction;\n    this.changed();\n  }\n\n  /**\n   * Set the URL to use for requests.\n   * @param {string|undefined} url URL.\n   * @api\n   */\n  setUrl(url) {\n    if (url != this.url_) {\n      this.url_ = url;\n      this.image_ = null;\n      this.changed();\n    }\n  }\n\n  /**\n   * Update the user-provided params.\n   * @param {Object} params Params.\n   * @api\n   */\n  updateParams(params) {\n    Object.assign(this.params_, params);\n    this.updateV13_();\n    this.image_ = null;\n    this.changed();\n  }\n\n  /**\n   * @private\n   */\n  updateV13_() {\n    const version = this.params_['VERSION'] || DEFAULT_VERSION;\n    this.v13_ = compareVersions(version, '1.3') >= 0;\n  }\n}\n\nexport default ImageWMS;\n","/**\n * @module ol/source/OSM\n */\n\nimport XYZ from './XYZ.js';\n\n/**\n * The attribution containing a link to the OpenStreetMap Copyright and License\n * page.\n * @const\n * @type {string}\n * @api\n */\nexport const ATTRIBUTION =\n  '&#169; ' +\n  '<a href=\"https://www.openstreetmap.org/copyright\" target=\"_blank\">OpenStreetMap</a> ' +\n  'contributors.';\n\n/**\n * @typedef {Object} Options\n * @property {import(\"./Source.js\").AttributionLike} [attributions] Attributions.\n * @property {number} [cacheSize] Initial tile cache size. Will auto-grow to hold at least the number of tiles in the viewport.\n * @property {null|string} [crossOrigin='anonymous'] The `crossOrigin` attribute for loaded images.  Note that\n * you must provide a `crossOrigin` value if you want to access pixel data with the Canvas renderer.\n * See https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image for more detail.\n * @property {boolean} [interpolate=true] Use interpolated values when resampling.  By default,\n * linear interpolation is used when resampling.  Set to false to use the nearest neighbor instead.\n * @property {number} [maxZoom=19] Max zoom.\n * @property {boolean} [opaque=true] Whether the layer is opaque.\n * @property {number} [reprojectionErrorThreshold=0.5] Maximum allowed reprojection error (in pixels).\n * Higher values can increase reprojection performance, but decrease precision.\n * @property {import(\"../Tile.js\").LoadFunction} [tileLoadFunction] Optional function to load a tile given a URL. The default is\n * ```js\n * function(imageTile, src) {\n *   imageTile.getImage().src = src;\n * };\n * ```\n * @property {number} [transition=250] Duration of the opacity transition for rendering.\n * To disable the opacity transition, pass `transition: 0`.\n * @property {string} [url='https://tile.openstreetmap.org/{z}/{x}/{y}.png'] URL template.\n * Must include `{x}`, `{y}` or `{-y}`, and `{z}` placeholders.\n * @property {boolean} [wrapX=true] Whether to wrap the world horizontally.\n * @property {number|import(\"../array.js\").NearestDirectionFunction} [zDirection=0]\n * Choose whether to use tiles with a higher or lower zoom level when between integer\n * zoom levels. See {@link module:ol/tilegrid/TileGrid~TileGrid#getZForResolution}.\n */\n\n/**\n * @classdesc\n * Layer source for the OpenStreetMap tile server.\n * @api\n */\nclass OSM extends XYZ {\n  /**\n   * @param {Options} [options] Open Street Map options.\n   */\n  constructor(options) {\n    options = options || {};\n\n    let attributions;\n    if (options.attributions !== undefined) {\n      attributions = options.attributions;\n    } else {\n      attributions = [ATTRIBUTION];\n    }\n\n    const crossOrigin =\n      options.crossOrigin !== undefined ? options.crossOrigin : 'anonymous';\n\n    const url =\n      options.url !== undefined\n        ? options.url\n        : 'https://tile.openstreetmap.org/{z}/{x}/{y}.png';\n\n    super({\n      attributions: attributions,\n      attributionsCollapsible: false,\n      cacheSize: options.cacheSize,\n      crossOrigin: crossOrigin,\n      interpolate: options.interpolate,\n      maxZoom: options.maxZoom !== undefined ? options.maxZoom : 19,\n      opaque: options.opaque !== undefined ? options.opaque : true,\n      reprojectionErrorThreshold: options.reprojectionErrorThreshold,\n      tileLoadFunction: options.tileLoadFunction,\n      transition: options.transition,\n      url: url,\n      wrapX: options.wrapX,\n      zDirection: options.zDirection,\n    });\n  }\n}\n\nexport default OSM;\n","/**\n * @module ol/layer/BaseImage\n */\nimport Layer from './Layer.js';\n\n/**\n * @template {import(\"../source/Image.js\").default} ImageSourceType\n * @typedef {Object} Options\n * @property {string} [className='ol-layer'] A CSS class name to set to the layer element.\n * @property {number} [opacity=1] Opacity (0, 1).\n * @property {boolean} [visible=true] Visibility.\n * @property {import(\"../extent.js\").Extent} [extent] The bounding extent for layer rendering.  The layer will not be\n * rendered outside of this extent.\n * @property {number} [zIndex] The z-index for layer rendering.  At rendering time, the layers\n * will be ordered, first by Z-index and then by position. When `undefined`, a `zIndex` of 0 is assumed\n * for layers that are added to the map's `layers` collection, or `Infinity` when the layer's `setMap()`\n * method was used.\n * @property {number} [minResolution] The minimum resolution (inclusive) at which this layer will be\n * visible.\n * @property {number} [maxResolution] The maximum resolution (exclusive) below which this layer will\n * be visible.\n * @property {number} [minZoom] The minimum view zoom level (exclusive) above which this layer will be\n * visible.\n * @property {number} [maxZoom] The maximum view zoom level (inclusive) at which this layer will\n * be visible.\n * @property {import(\"../Map.js\").default} [map] Sets the layer as overlay on a map. The map will not manage\n * this layer in its layers collection, and the layer will be rendered on top. This is useful for\n * temporary layers. The standard way to add a layer to a map and have it managed by the map is to\n * use {@link import(\"../Map.js\").default#addLayer map.addLayer()}.\n * @property {ImageSourceType} [source] Source for this layer.\n * @property {Object<string, *>} [properties] Arbitrary observable properties. Can be accessed with `#get()` and `#set()`.\n */\n\n/**\n * @classdesc\n * Server-rendered images that are available for arbitrary extents and\n * resolutions.\n * Note that any property set in the options is set as a {@link module:ol/Object~BaseObject}\n * property on the layer object; for example, setting `title: 'My Title'` in the\n * options means that `title` is observable, and has get/set accessors.\n *\n * @template {import(\"../source/Image.js\").default} ImageSourceType\n * @template {import(\"../renderer/Layer.js\").default} RendererType\n * @extends {Layer<ImageSourceType, RendererType>}\n * @api\n */\nclass BaseImageLayer extends Layer {\n  /**\n   * @param {Options<ImageSourceType>} [options] Layer options.\n   */\n  constructor(options) {\n    options = options ? options : {};\n    super(options);\n  }\n}\n\nexport default BaseImageLayer;\n","/**\n * @module ol/renderer/Layer\n */\nimport EventType from '../events/EventType.js';\nimport ImageState from '../ImageState.js';\nimport Observable from '../Observable.js';\nimport {abstract} from '../util.js';\n\n/**\n * @template {import(\"../layer/Layer.js\").default} LayerType\n */\nclass LayerRenderer extends Observable {\n  /**\n   * @param {LayerType} layer Layer.\n   */\n  constructor(layer) {\n    super();\n\n    /**\n     * The renderer is initialized and ready to render.\n     * @type {boolean}\n     */\n    this.ready = true;\n\n    /** @private */\n    this.boundHandleImageChange_ = this.handleImageChange_.bind(this);\n\n    /**\n     * @protected\n     * @type {LayerType}\n     */\n    this.layer_ = layer;\n\n    /**\n     * @type {import(\"../render/canvas/ExecutorGroup\").default}\n     */\n    this.declutterExecutorGroup = null;\n  }\n\n  /**\n   * Asynchronous layer level hit detection.\n   * @param {import(\"../pixel.js\").Pixel} pixel Pixel.\n   * @return {Promise<Array<import(\"../Feature\").FeatureLike>>} Promise that resolves with\n   * an array of features.\n   */\n  getFeatures(pixel) {\n    return abstract();\n  }\n\n  /**\n   * @param {import(\"../pixel.js\").Pixel} pixel Pixel.\n   * @return {Uint8ClampedArray|Uint8Array|Float32Array|DataView|null} Pixel data.\n   */\n  getData(pixel) {\n    return null;\n  }\n\n  /**\n   * Determine whether render should be called.\n   * @abstract\n   * @param {import(\"../Map.js\").FrameState} frameState Frame state.\n   * @return {boolean} Layer is ready to be rendered.\n   */\n  prepareFrame(frameState) {\n    return abstract();\n  }\n\n  /**\n   * Render the layer.\n   * @abstract\n   * @param {import(\"../Map.js\").FrameState} frameState Frame state.\n   * @param {HTMLElement} target Target that may be used to render content to.\n   * @return {HTMLElement} The rendered element.\n   */\n  renderFrame(frameState, target) {\n    return abstract();\n  }\n\n  /**\n   * @param {Object<number, Object<string, import(\"../Tile.js\").default>>} tiles Lookup of loaded tiles by zoom level.\n   * @param {number} zoom Zoom level.\n   * @param {import(\"../Tile.js\").default} tile Tile.\n   * @return {boolean|void} If `false`, the tile will not be considered loaded.\n   */\n  loadedTileCallback(tiles, zoom, tile) {\n    if (!tiles[zoom]) {\n      tiles[zoom] = {};\n    }\n    tiles[zoom][tile.tileCoord.toString()] = tile;\n    return undefined;\n  }\n\n  /**\n   * Create a function that adds loaded tiles to the tile lookup.\n   * @param {import(\"../source/Tile.js\").default} source Tile source.\n   * @param {import(\"../proj/Projection.js\").default} projection Projection of the tiles.\n   * @param {Object<number, Object<string, import(\"../Tile.js\").default>>} tiles Lookup of loaded tiles by zoom level.\n   * @return {function(number, import(\"../TileRange.js\").default):boolean} A function that can be\n   *     called with a zoom level and a tile range to add loaded tiles to the lookup.\n   * @protected\n   */\n  createLoadedTileFinder(source, projection, tiles) {\n    return (\n      /**\n       * @param {number} zoom Zoom level.\n       * @param {import(\"../TileRange.js\").default} tileRange Tile range.\n       * @return {boolean} The tile range is fully loaded.\n       */\n      (zoom, tileRange) => {\n        const callback = this.loadedTileCallback.bind(this, tiles, zoom);\n        return source.forEachLoadedTile(projection, zoom, tileRange, callback);\n      }\n    );\n  }\n  /**\n   * @abstract\n   * @param {import(\"../coordinate.js\").Coordinate} coordinate Coordinate.\n   * @param {import(\"../Map.js\").FrameState} frameState Frame state.\n   * @param {number} hitTolerance Hit tolerance in pixels.\n   * @param {import(\"./vector.js\").FeatureCallback<T>} callback Feature callback.\n   * @param {Array<import(\"./Map.js\").HitMatch<T>>} matches The hit detected matches with tolerance.\n   * @return {T|undefined} Callback result.\n   * @template T\n   */\n  forEachFeatureAtCoordinate(\n    coordinate,\n    frameState,\n    hitTolerance,\n    callback,\n    matches\n  ) {\n    return undefined;\n  }\n\n  /**\n   * @return {LayerType} Layer.\n   */\n  getLayer() {\n    return this.layer_;\n  }\n\n  /**\n   * Perform action necessary to get the layer rendered after new fonts have loaded\n   * @abstract\n   */\n  handleFontsChanged() {}\n\n  /**\n   * Handle changes in image state.\n   * @param {import(\"../events/Event.js\").default} event Image change event.\n   * @private\n   */\n  handleImageChange_(event) {\n    const image = /** @type {import(\"../Image.js\").default} */ (event.target);\n    if (\n      image.getState() === ImageState.LOADED ||\n      image.getState() === ImageState.ERROR\n    ) {\n      this.renderIfReadyAndVisible();\n    }\n  }\n\n  /**\n   * Load the image if not already loaded, and register the image change\n   * listener if needed.\n   * @param {import(\"../ImageBase.js\").default} image Image.\n   * @return {boolean} `true` if the image is already loaded, `false` otherwise.\n   * @protected\n   */\n  loadImage(image) {\n    let imageState = image.getState();\n    if (imageState != ImageState.LOADED && imageState != ImageState.ERROR) {\n      image.addEventListener(EventType.CHANGE, this.boundHandleImageChange_);\n    }\n    if (imageState == ImageState.IDLE) {\n      image.load();\n      imageState = image.getState();\n    }\n    return imageState == ImageState.LOADED;\n  }\n\n  /**\n   * @protected\n   */\n  renderIfReadyAndVisible() {\n    const layer = this.getLayer();\n    if (layer && layer.getVisible() && layer.getSourceState() === 'ready') {\n      layer.changed();\n    }\n  }\n\n  /**\n   * Clean up.\n   */\n  disposeInternal() {\n    delete this.layer_;\n    super.disposeInternal();\n  }\n}\n\nexport default LayerRenderer;\n","/**\n * @module ol/renderer/canvas/Layer\n */\nimport LayerRenderer from '../Layer.js';\nimport RenderEvent from '../../render/Event.js';\nimport RenderEventType from '../../render/EventType.js';\nimport {\n  apply as applyTransform,\n  compose as composeTransform,\n  create as createTransform,\n} from '../../transform.js';\nimport {asArray} from '../../color.js';\nimport {createCanvasContext2D} from '../../dom.js';\nimport {equals} from '../../array.js';\nimport {\n  getBottomLeft,\n  getBottomRight,\n  getTopLeft,\n  getTopRight,\n} from '../../extent.js';\n\n/**\n * @type {Array<HTMLCanvasElement>}\n */\nexport const canvasPool = [];\n\n/**\n * @type {CanvasRenderingContext2D}\n */\nlet pixelContext = null;\n\nfunction createPixelContext() {\n  pixelContext = createCanvasContext2D(1, 1, undefined, {\n    willReadFrequently: true,\n  });\n}\n\n/**\n * @abstract\n * @template {import(\"../../layer/Layer.js\").default} LayerType\n * @extends {LayerRenderer<LayerType>}\n */\nclass CanvasLayerRenderer extends LayerRenderer {\n  /**\n   * @param {LayerType} layer Layer.\n   */\n  constructor(layer) {\n    super(layer);\n\n    /**\n     * @protected\n     * @type {HTMLElement}\n     */\n    this.container = null;\n\n    /**\n     * @protected\n     * @type {number}\n     */\n    this.renderedResolution;\n\n    /**\n     * A temporary transform.  The values in this transform should only be used in a\n     * function that sets the values.\n     * @protected\n     * @type {import(\"../../transform.js\").Transform}\n     */\n    this.tempTransform = createTransform();\n\n    /**\n     * The transform for rendered pixels to viewport CSS pixels.  This transform must\n     * be set when rendering a frame and may be used by other functions after rendering.\n     * @protected\n     * @type {import(\"../../transform.js\").Transform}\n     */\n    this.pixelTransform = createTransform();\n\n    /**\n     * The transform for viewport CSS pixels to rendered pixels.  This transform must\n     * be set when rendering a frame and may be used by other functions after rendering.\n     * @protected\n     * @type {import(\"../../transform.js\").Transform}\n     */\n    this.inversePixelTransform = createTransform();\n\n    /**\n     * @type {CanvasRenderingContext2D}\n     */\n    this.context = null;\n\n    /**\n     * @type {boolean}\n     */\n    this.containerReused = false;\n\n    /**\n     * @private\n     * @type {CanvasRenderingContext2D}\n     */\n    this.pixelContext_ = null;\n\n    /**\n     * @protected\n     * @type {import(\"../../Map.js\").FrameState|null}\n     */\n    this.frameState = null;\n  }\n\n  /**\n   * @param {HTMLCanvasElement|HTMLImageElement|HTMLVideoElement} image Image.\n   * @param {number} col The column index.\n   * @param {number} row The row index.\n   * @return {Uint8ClampedArray|null} The image data.\n   */\n  getImageData(image, col, row) {\n    if (!pixelContext) {\n      createPixelContext();\n    }\n    pixelContext.clearRect(0, 0, 1, 1);\n\n    let data;\n    try {\n      pixelContext.drawImage(image, col, row, 1, 1, 0, 0, 1, 1);\n      data = pixelContext.getImageData(0, 0, 1, 1).data;\n    } catch (err) {\n      pixelContext = null;\n      return null;\n    }\n    return data;\n  }\n\n  /**\n   * @param {import('../../Map.js').FrameState} frameState Frame state.\n   * @return {string} Background color.\n   */\n  getBackground(frameState) {\n    const layer = this.getLayer();\n    let background = layer.getBackground();\n    if (typeof background === 'function') {\n      background = background(frameState.viewState.resolution);\n    }\n    return background || undefined;\n  }\n\n  /**\n   * Get a rendering container from an existing target, if compatible.\n   * @param {HTMLElement} target Potential render target.\n   * @param {string} transform CSS Transform.\n   * @param {string} [backgroundColor] Background color.\n   */\n  useContainer(target, transform, backgroundColor) {\n    const layerClassName = this.getLayer().getClassName();\n    let container, context;\n    if (\n      target &&\n      target.className === layerClassName &&\n      (!backgroundColor ||\n        (target &&\n          target.style.backgroundColor &&\n          equals(\n            asArray(target.style.backgroundColor),\n            asArray(backgroundColor)\n          )))\n    ) {\n      const canvas = target.firstElementChild;\n      if (canvas instanceof HTMLCanvasElement) {\n        context = canvas.getContext('2d');\n      }\n    }\n    if (context && context.canvas.style.transform === transform) {\n      // Container of the previous layer renderer can be used.\n      this.container = target;\n      this.context = context;\n      this.containerReused = true;\n    } else if (this.containerReused) {\n      // Previously reused container cannot be used any more.\n      this.container = null;\n      this.context = null;\n      this.containerReused = false;\n    } else if (this.container) {\n      this.container.style.backgroundColor = null;\n    }\n    if (!this.container) {\n      container = document.createElement('div');\n      container.className = layerClassName;\n      let style = container.style;\n      style.position = 'absolute';\n      style.width = '100%';\n      style.height = '100%';\n      context = createCanvasContext2D();\n      const canvas = context.canvas;\n      container.appendChild(canvas);\n      style = canvas.style;\n      style.position = 'absolute';\n      style.left = '0';\n      style.transformOrigin = 'top left';\n      this.container = container;\n      this.context = context;\n    }\n    if (\n      !this.containerReused &&\n      backgroundColor &&\n      !this.container.style.backgroundColor\n    ) {\n      this.container.style.backgroundColor = backgroundColor;\n    }\n  }\n\n  /**\n   * @param {CanvasRenderingContext2D} context Context.\n   * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n   * @param {import(\"../../extent.js\").Extent} extent Clip extent.\n   * @protected\n   */\n  clipUnrotated(context, frameState, extent) {\n    const topLeft = getTopLeft(extent);\n    const topRight = getTopRight(extent);\n    const bottomRight = getBottomRight(extent);\n    const bottomLeft = getBottomLeft(extent);\n\n    applyTransform(frameState.coordinateToPixelTransform, topLeft);\n    applyTransform(frameState.coordinateToPixelTransform, topRight);\n    applyTransform(frameState.coordinateToPixelTransform, bottomRight);\n    applyTransform(frameState.coordinateToPixelTransform, bottomLeft);\n\n    const inverted = this.inversePixelTransform;\n    applyTransform(inverted, topLeft);\n    applyTransform(inverted, topRight);\n    applyTransform(inverted, bottomRight);\n    applyTransform(inverted, bottomLeft);\n\n    context.save();\n    context.beginPath();\n    context.moveTo(Math.round(topLeft[0]), Math.round(topLeft[1]));\n    context.lineTo(Math.round(topRight[0]), Math.round(topRight[1]));\n    context.lineTo(Math.round(bottomRight[0]), Math.round(bottomRight[1]));\n    context.lineTo(Math.round(bottomLeft[0]), Math.round(bottomLeft[1]));\n    context.clip();\n  }\n\n  /**\n   * @param {import(\"../../render/EventType.js\").default} type Event type.\n   * @param {CanvasRenderingContext2D} context Context.\n   * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n   * @private\n   */\n  dispatchRenderEvent_(type, context, frameState) {\n    const layer = this.getLayer();\n    if (layer.hasListener(type)) {\n      const event = new RenderEvent(\n        type,\n        this.inversePixelTransform,\n        frameState,\n        context\n      );\n      layer.dispatchEvent(event);\n    }\n  }\n\n  /**\n   * @param {CanvasRenderingContext2D} context Context.\n   * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n   * @protected\n   */\n  preRender(context, frameState) {\n    this.frameState = frameState;\n    this.dispatchRenderEvent_(RenderEventType.PRERENDER, context, frameState);\n  }\n\n  /**\n   * @param {CanvasRenderingContext2D} context Context.\n   * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n   * @protected\n   */\n  postRender(context, frameState) {\n    this.dispatchRenderEvent_(RenderEventType.POSTRENDER, context, frameState);\n  }\n\n  /**\n   * Creates a transform for rendering to an element that will be rotated after rendering.\n   * @param {import(\"../../coordinate.js\").Coordinate} center Center.\n   * @param {number} resolution Resolution.\n   * @param {number} rotation Rotation.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {number} width Width of the rendered element (in pixels).\n   * @param {number} height Height of the rendered element (in pixels).\n   * @param {number} offsetX Offset on the x-axis in view coordinates.\n   * @protected\n   * @return {!import(\"../../transform.js\").Transform} Transform.\n   */\n  getRenderTransform(\n    center,\n    resolution,\n    rotation,\n    pixelRatio,\n    width,\n    height,\n    offsetX\n  ) {\n    const dx1 = width / 2;\n    const dy1 = height / 2;\n    const sx = pixelRatio / resolution;\n    const sy = -sx;\n    const dx2 = -center[0] + offsetX;\n    const dy2 = -center[1];\n    return composeTransform(\n      this.tempTransform,\n      dx1,\n      dy1,\n      sx,\n      sy,\n      -rotation,\n      dx2,\n      dy2\n    );\n  }\n\n  /**\n   * Clean up.\n   */\n  disposeInternal() {\n    delete this.frameState;\n    super.disposeInternal();\n  }\n}\n\nexport default CanvasLayerRenderer;\n","/**\n * @module ol/renderer/canvas/ImageLayer\n */\nimport CanvasLayerRenderer from './Layer.js';\nimport ImageState from '../../ImageState.js';\nimport ViewHint from '../../ViewHint.js';\nimport {\n  apply as applyTransform,\n  compose as composeTransform,\n  makeInverse,\n  toString as toTransformString,\n} from '../../transform.js';\nimport {\n  containsCoordinate,\n  containsExtent,\n  getHeight,\n  getIntersection,\n  getWidth,\n  intersects as intersectsExtent,\n  isEmpty,\n} from '../../extent.js';\nimport {fromUserExtent} from '../../proj.js';\n\n/**\n * @classdesc\n * Canvas renderer for image layers.\n * @api\n */\nclass CanvasImageLayerRenderer extends CanvasLayerRenderer {\n  /**\n   * @param {import(\"../../layer/Image.js\").default} imageLayer Image layer.\n   */\n  constructor(imageLayer) {\n    super(imageLayer);\n\n    /**\n     * @protected\n     * @type {?import(\"../../ImageBase.js\").default}\n     */\n    this.image_ = null;\n  }\n\n  /**\n   * @return {HTMLCanvasElement|HTMLImageElement|HTMLVideoElement} Image.\n   */\n  getImage() {\n    return this.image_ ? this.image_.getImage() : null;\n  }\n\n  /**\n   * Determine whether render should be called.\n   * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n   * @return {boolean} Layer is ready to be rendered.\n   */\n  prepareFrame(frameState) {\n    const layerState = frameState.layerStatesArray[frameState.layerIndex];\n    const pixelRatio = frameState.pixelRatio;\n    const viewState = frameState.viewState;\n    const viewResolution = viewState.resolution;\n\n    const imageSource = this.getLayer().getSource();\n\n    const hints = frameState.viewHints;\n\n    let renderedExtent = frameState.extent;\n    if (layerState.extent !== undefined) {\n      renderedExtent = getIntersection(\n        renderedExtent,\n        fromUserExtent(layerState.extent, viewState.projection)\n      );\n    }\n\n    if (\n      !hints[ViewHint.ANIMATING] &&\n      !hints[ViewHint.INTERACTING] &&\n      !isEmpty(renderedExtent)\n    ) {\n      if (imageSource) {\n        const projection = viewState.projection;\n        const image = imageSource.getImage(\n          renderedExtent,\n          viewResolution,\n          pixelRatio,\n          projection\n        );\n        if (image) {\n          if (this.loadImage(image)) {\n            this.image_ = image;\n          } else if (image.getState() === ImageState.EMPTY) {\n            this.image_ = null;\n          }\n        }\n      } else {\n        this.image_ = null;\n      }\n    }\n\n    return !!this.image_;\n  }\n\n  /**\n   * @param {import(\"../../pixel.js\").Pixel} pixel Pixel.\n   * @return {Uint8ClampedArray} Data at the pixel location.\n   */\n  getData(pixel) {\n    const frameState = this.frameState;\n    if (!frameState) {\n      return null;\n    }\n\n    const layer = this.getLayer();\n    const coordinate = applyTransform(\n      frameState.pixelToCoordinateTransform,\n      pixel.slice()\n    );\n\n    const layerExtent = layer.getExtent();\n    if (layerExtent) {\n      if (!containsCoordinate(layerExtent, coordinate)) {\n        return null;\n      }\n    }\n\n    const imageExtent = this.image_.getExtent();\n    const img = this.getImage();\n\n    const imageMapWidth = getWidth(imageExtent);\n    const col = Math.floor(\n      img.width * ((coordinate[0] - imageExtent[0]) / imageMapWidth)\n    );\n    if (col < 0 || col >= img.width) {\n      return null;\n    }\n\n    const imageMapHeight = getHeight(imageExtent);\n    const row = Math.floor(\n      img.height * ((imageExtent[3] - coordinate[1]) / imageMapHeight)\n    );\n    if (row < 0 || row >= img.height) {\n      return null;\n    }\n\n    return this.getImageData(img, col, row);\n  }\n\n  /**\n   * Render the layer.\n   * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n   * @param {HTMLElement} target Target that may be used to render content to.\n   * @return {HTMLElement} The rendered element.\n   */\n  renderFrame(frameState, target) {\n    const image = this.image_;\n    const imageExtent = image.getExtent();\n    const imageResolution = image.getResolution();\n    const imagePixelRatio = image.getPixelRatio();\n    const layerState = frameState.layerStatesArray[frameState.layerIndex];\n    const pixelRatio = frameState.pixelRatio;\n    const viewState = frameState.viewState;\n    const viewCenter = viewState.center;\n    const viewResolution = viewState.resolution;\n    const scale =\n      (pixelRatio * imageResolution) / (viewResolution * imagePixelRatio);\n\n    const extent = frameState.extent;\n    const resolution = viewState.resolution;\n    const rotation = viewState.rotation;\n    // desired dimensions of the canvas in pixels\n    const width = Math.round((getWidth(extent) / resolution) * pixelRatio);\n    const height = Math.round((getHeight(extent) / resolution) * pixelRatio);\n\n    // set forward and inverse pixel transforms\n    composeTransform(\n      this.pixelTransform,\n      frameState.size[0] / 2,\n      frameState.size[1] / 2,\n      1 / pixelRatio,\n      1 / pixelRatio,\n      rotation,\n      -width / 2,\n      -height / 2\n    );\n    makeInverse(this.inversePixelTransform, this.pixelTransform);\n\n    const canvasTransform = toTransformString(this.pixelTransform);\n\n    this.useContainer(target, canvasTransform, this.getBackground(frameState));\n\n    const context = this.context;\n    const canvas = context.canvas;\n\n    if (canvas.width != width || canvas.height != height) {\n      canvas.width = width;\n      canvas.height = height;\n    } else if (!this.containerReused) {\n      context.clearRect(0, 0, width, height);\n    }\n\n    // clipped rendering if layer extent is set\n    let clipped = false;\n    let render = true;\n    if (layerState.extent) {\n      const layerExtent = fromUserExtent(\n        layerState.extent,\n        viewState.projection\n      );\n      render = intersectsExtent(layerExtent, frameState.extent);\n      clipped = render && !containsExtent(layerExtent, frameState.extent);\n      if (clipped) {\n        this.clipUnrotated(context, frameState, layerExtent);\n      }\n    }\n\n    const img = this.getImage();\n\n    const transform = composeTransform(\n      this.tempTransform,\n      width / 2,\n      height / 2,\n      scale,\n      scale,\n      0,\n      (imagePixelRatio * (imageExtent[0] - viewCenter[0])) / imageResolution,\n      (imagePixelRatio * (viewCenter[1] - imageExtent[3])) / imageResolution\n    );\n\n    this.renderedResolution = (imageResolution * pixelRatio) / imagePixelRatio;\n\n    const dw = img.width * transform[0];\n    const dh = img.height * transform[3];\n\n    if (!this.getLayer().getSource().getInterpolate()) {\n      context.imageSmoothingEnabled = false;\n    }\n\n    this.preRender(context, frameState);\n    if (render && dw >= 0.5 && dh >= 0.5) {\n      const dx = transform[4];\n      const dy = transform[5];\n      const opacity = layerState.opacity;\n      let previousAlpha;\n      if (opacity !== 1) {\n        previousAlpha = context.globalAlpha;\n        context.globalAlpha = opacity;\n      }\n      context.drawImage(img, 0, 0, +img.width, +img.height, dx, dy, dw, dh);\n      if (opacity !== 1) {\n        context.globalAlpha = previousAlpha;\n      }\n    }\n    this.postRender(context, frameState);\n\n    if (clipped) {\n      context.restore();\n    }\n    context.imageSmoothingEnabled = true;\n\n    if (canvasTransform !== canvas.style.transform) {\n      canvas.style.transform = canvasTransform;\n    }\n\n    return this.container;\n  }\n}\n\nexport default CanvasImageLayerRenderer;\n","/**\n * @module ol/layer/Image\n */\nimport BaseImageLayer from './BaseImage.js';\nimport CanvasImageLayerRenderer from '../renderer/canvas/ImageLayer.js';\n\n/**\n * @classdesc\n * Server-rendered images that are available for arbitrary extents and\n * resolutions.\n * Note that any property set in the options is set as a {@link module:ol/Object~BaseObject}\n * property on the layer object; for example, setting `title: 'My Title'` in the\n * options means that `title` is observable, and has get/set accessors.\n *\n * @template {import(\"../source/Image.js\").default} ImageSourceType\n * @extends {BaseImageLayer<ImageSourceType, CanvasImageLayerRenderer>}\n * @api\n */\nclass ImageLayer extends BaseImageLayer {\n  /**\n   * @param {import(\"./BaseImage.js\").Options<ImageSourceType>} [options] Layer options.\n   */\n  constructor(options) {\n    super(options);\n  }\n\n  createRenderer() {\n    return new CanvasImageLayerRenderer(this);\n  }\n\n  /**\n   * Get data for a pixel location.  A four element RGBA array will be returned.  For requests outside the\n   * layer extent, `null` will be returned.  Data for an image can only be retrieved if the\n   * source's `crossOrigin` property is set.\n   *\n   * ```js\n   * // display layer data on every pointer move\n   * map.on('pointermove', (event) => {\n   *   console.log(layer.getData(event.pixel));\n   * });\n   * ```\n   * @param {import(\"../pixel\").Pixel} pixel Pixel.\n   * @return {Uint8ClampedArray|Uint8Array|Float32Array|DataView|null} Pixel data.\n   * @api\n   */\n  getData(pixel) {\n    return super.getData(pixel);\n  }\n}\n\nexport default ImageLayer;\n","/**\n * @module ol/layer/TileProperty\n */\n\n/**\n * @enum {string}\n */\nexport default {\n  PRELOAD: 'preload',\n  USE_INTERIM_TILES_ON_ERROR: 'useInterimTilesOnError',\n};\n","/**\n * @module ol/layer/BaseTile\n */\nimport Layer from './Layer.js';\nimport TileProperty from './TileProperty.js';\n\n/***\n * @template Return\n * @typedef {import(\"../Observable\").OnSignature<import(\"../Observable\").EventTypes, import(\"../events/Event.js\").default, Return> &\n *   import(\"../Observable\").OnSignature<import(\"./Base\").BaseLayerObjectEventTypes|\n *     import(\"./Layer.js\").LayerEventType|'change:preload'|'change:useInterimTilesOnError', import(\"../Object\").ObjectEvent, Return> &\n *   import(\"../Observable\").OnSignature<import(\"../render/EventType\").LayerRenderEventTypes, import(\"../render/Event\").default, Return> &\n *   import(\"../Observable\").CombinedOnSignature<import(\"../Observable\").EventTypes|import(\"./Base\").BaseLayerObjectEventTypes|\n *   import(\"./Layer.js\").LayerEventType|'change:preload'|'change:useInterimTilesOnError'|import(\"../render/EventType\").LayerRenderEventTypes, Return>} BaseTileLayerOnSignature\n */\n\n/**\n * @template {import(\"../source/Tile.js\").default} TileSourceType\n * @typedef {Object} Options\n * @property {string} [className='ol-layer'] A CSS class name to set to the layer element.\n * @property {number} [opacity=1] Opacity (0, 1).\n * @property {boolean} [visible=true] Visibility.\n * @property {import(\"../extent.js\").Extent} [extent] The bounding extent for layer rendering.  The layer will not be\n * rendered outside of this extent.\n * @property {number} [zIndex] The z-index for layer rendering.  At rendering time, the layers\n * will be ordered, first by Z-index and then by position. When `undefined`, a `zIndex` of 0 is assumed\n * for layers that are added to the map's `layers` collection, or `Infinity` when the layer's `setMap()`\n * method was used.\n * @property {number} [minResolution] The minimum resolution (inclusive) at which this layer will be\n * visible.\n * @property {number} [maxResolution] The maximum resolution (exclusive) below which this layer will\n * be visible.\n * @property {number} [minZoom] The minimum view zoom level (exclusive) above which this layer will be\n * visible.\n * @property {number} [maxZoom] The maximum view zoom level (inclusive) at which this layer will\n * be visible.\n * @property {number} [preload=0] Preload. Load low-resolution tiles up to `preload` levels. `0`\n * means no preloading.\n * @property {TileSourceType} [source] Source for this layer.\n * @property {import(\"../Map.js\").default} [map] Sets the layer as overlay on a map. The map will not manage\n * this layer in its layers collection, and the layer will be rendered on top. This is useful for\n * temporary layers. The standard way to add a layer to a map and have it managed by the map is to\n * use {@link import(\"../Map.js\").default#addLayer map.addLayer()}.\n * @property {boolean} [useInterimTilesOnError=true] Use interim tiles on error.\n * @property {Object<string, *>} [properties] Arbitrary observable properties. Can be accessed with `#get()` and `#set()`.\n */\n\n/**\n * @classdesc\n * For layer sources that provide pre-rendered, tiled images in grids that are\n * organized by zoom levels for specific resolutions.\n * Note that any property set in the options is set as a {@link module:ol/Object~BaseObject}\n * property on the layer object; for example, setting `title: 'My Title'` in the\n * options means that `title` is observable, and has get/set accessors.\n *\n * @template {import(\"../source/Tile.js\").default} TileSourceType\n * @template {import(\"../renderer/Layer.js\").default} RendererType\n * @extends {Layer<TileSourceType, RendererType>}\n * @api\n */\nclass BaseTileLayer extends Layer {\n  /**\n   * @param {Options<TileSourceType>} [options] Tile layer options.\n   */\n  constructor(options) {\n    options = options ? options : {};\n\n    const baseOptions = Object.assign({}, options);\n\n    delete baseOptions.preload;\n    delete baseOptions.useInterimTilesOnError;\n    super(baseOptions);\n\n    /***\n     * @type {BaseTileLayerOnSignature<import(\"../events\").EventsKey>}\n     */\n    this.on;\n\n    /***\n     * @type {BaseTileLayerOnSignature<import(\"../events\").EventsKey>}\n     */\n    this.once;\n\n    /***\n     * @type {BaseTileLayerOnSignature<void>}\n     */\n    this.un;\n\n    this.setPreload(options.preload !== undefined ? options.preload : 0);\n    this.setUseInterimTilesOnError(\n      options.useInterimTilesOnError !== undefined\n        ? options.useInterimTilesOnError\n        : true\n    );\n  }\n\n  /**\n   * Return the level as number to which we will preload tiles up to.\n   * @return {number} The level to preload tiles up to.\n   * @observable\n   * @api\n   */\n  getPreload() {\n    return /** @type {number} */ (this.get(TileProperty.PRELOAD));\n  }\n\n  /**\n   * Set the level as number to which we will preload tiles up to.\n   * @param {number} preload The level to preload tiles up to.\n   * @observable\n   * @api\n   */\n  setPreload(preload) {\n    this.set(TileProperty.PRELOAD, preload);\n  }\n\n  /**\n   * Whether we use interim tiles on error.\n   * @return {boolean} Use interim tiles on error.\n   * @observable\n   * @api\n   */\n  getUseInterimTilesOnError() {\n    return /** @type {boolean} */ (\n      this.get(TileProperty.USE_INTERIM_TILES_ON_ERROR)\n    );\n  }\n\n  /**\n   * Set whether we use interim tiles on error.\n   * @param {boolean} useInterimTilesOnError Use interim tiles on error.\n   * @observable\n   * @api\n   */\n  setUseInterimTilesOnError(useInterimTilesOnError) {\n    this.set(TileProperty.USE_INTERIM_TILES_ON_ERROR, useInterimTilesOnError);\n  }\n\n  /**\n   * Get data for a pixel location.  The return type depends on the source data.  For image tiles,\n   * a four element RGBA array will be returned.  For data tiles, the array length will match the\n   * number of bands in the dataset.  For requests outside the layer extent, `null` will be returned.\n   * Data for a image tiles can only be retrieved if the source's `crossOrigin` property is set.\n   *\n   * ```js\n   * // display layer data on every pointer move\n   * map.on('pointermove', (event) => {\n   *   console.log(layer.getData(event.pixel));\n   * });\n   * ```\n   * @param {import(\"../pixel\").Pixel} pixel Pixel.\n   * @return {Uint8ClampedArray|Uint8Array|Float32Array|DataView|null} Pixel data.\n   * @api\n   */\n  getData(pixel) {\n    return super.getData(pixel);\n  }\n}\n\nexport default BaseTileLayer;\n","/**\n * @module ol/renderer/canvas/TileLayer\n */\nimport CanvasLayerRenderer from './Layer.js';\nimport ImageTile from '../../ImageTile.js';\nimport ReprojTile from '../../reproj/Tile.js';\nimport TileRange from '../../TileRange.js';\nimport TileState from '../../TileState.js';\nimport {\n  apply as applyTransform,\n  compose as composeTransform,\n  makeInverse,\n  toString as toTransformString,\n} from '../../transform.js';\nimport {ascending} from '../../array.js';\nimport {\n  containsCoordinate,\n  createEmpty,\n  equals,\n  getHeight,\n  getIntersection,\n  getRotatedViewport,\n  getTopLeft,\n  getWidth,\n  intersects,\n} from '../../extent.js';\nimport {fromUserExtent} from '../../proj.js';\nimport {getUid} from '../../util.js';\nimport {toSize} from '../../size.js';\n\n/**\n * @classdesc\n * Canvas renderer for tile layers.\n * @api\n * @template {import(\"../../layer/Tile.js\").default<import(\"../../source/Tile.js\").default>|import(\"../../layer/VectorTile.js\").default} [LayerType=import(\"../../layer/Tile.js\").default<import(\"../../source/Tile.js\").default>|import(\"../../layer/VectorTile.js\").default]\n * @extends {CanvasLayerRenderer<LayerType>}\n */\nclass CanvasTileLayerRenderer extends CanvasLayerRenderer {\n  /**\n   * @param {LayerType} tileLayer Tile layer.\n   */\n  constructor(tileLayer) {\n    super(tileLayer);\n\n    /**\n     * Rendered extent has changed since the previous `renderFrame()` call\n     * @type {boolean}\n     */\n    this.extentChanged = true;\n\n    /**\n     * @private\n     * @type {?import(\"../../extent.js\").Extent}\n     */\n    this.renderedExtent_ = null;\n\n    /**\n     * @protected\n     * @type {number}\n     */\n    this.renderedPixelRatio;\n\n    /**\n     * @protected\n     * @type {import(\"../../proj/Projection.js\").default}\n     */\n    this.renderedProjection = null;\n\n    /**\n     * @protected\n     * @type {number}\n     */\n    this.renderedRevision;\n\n    /**\n     * @protected\n     * @type {!Array<import(\"../../Tile.js\").default>}\n     */\n    this.renderedTiles = [];\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.newTiles_ = false;\n\n    /**\n     * @protected\n     * @type {import(\"../../extent.js\").Extent}\n     */\n    this.tmpExtent = createEmpty();\n\n    /**\n     * @private\n     * @type {import(\"../../TileRange.js\").default}\n     */\n    this.tmpTileRange_ = new TileRange(0, 0, 0, 0);\n  }\n\n  /**\n   * @protected\n   * @param {import(\"../../Tile.js\").default} tile Tile.\n   * @return {boolean} Tile is drawable.\n   */\n  isDrawableTile(tile) {\n    const tileLayer = this.getLayer();\n    const tileState = tile.getState();\n    const useInterimTilesOnError = tileLayer.getUseInterimTilesOnError();\n    return (\n      tileState == TileState.LOADED ||\n      tileState == TileState.EMPTY ||\n      (tileState == TileState.ERROR && !useInterimTilesOnError)\n    );\n  }\n\n  /**\n   * @param {number} z Tile coordinate z.\n   * @param {number} x Tile coordinate x.\n   * @param {number} y Tile coordinate y.\n   * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n   * @return {!import(\"../../Tile.js\").default} Tile.\n   */\n  getTile(z, x, y, frameState) {\n    const pixelRatio = frameState.pixelRatio;\n    const projection = frameState.viewState.projection;\n    const tileLayer = this.getLayer();\n    const tileSource = tileLayer.getSource();\n    let tile = tileSource.getTile(z, x, y, pixelRatio, projection);\n    if (tile.getState() == TileState.ERROR) {\n      if (tileLayer.getUseInterimTilesOnError() && tileLayer.getPreload() > 0) {\n        // Preloaded tiles for lower resolutions might have finished loading.\n        this.newTiles_ = true;\n      }\n    }\n    if (!this.isDrawableTile(tile)) {\n      tile = tile.getInterimTile();\n    }\n    return tile;\n  }\n\n  /**\n   * @param {import(\"../../pixel.js\").Pixel} pixel Pixel.\n   * @return {Uint8ClampedArray} Data at the pixel location.\n   */\n  getData(pixel) {\n    const frameState = this.frameState;\n    if (!frameState) {\n      return null;\n    }\n\n    const layer = this.getLayer();\n    const coordinate = applyTransform(\n      frameState.pixelToCoordinateTransform,\n      pixel.slice()\n    );\n\n    const layerExtent = layer.getExtent();\n    if (layerExtent) {\n      if (!containsCoordinate(layerExtent, coordinate)) {\n        return null;\n      }\n    }\n\n    const pixelRatio = frameState.pixelRatio;\n    const projection = frameState.viewState.projection;\n    const viewState = frameState.viewState;\n    const source = layer.getRenderSource();\n    const tileGrid = source.getTileGridForProjection(viewState.projection);\n    const tilePixelRatio = source.getTilePixelRatio(frameState.pixelRatio);\n\n    for (\n      let z = tileGrid.getZForResolution(viewState.resolution);\n      z >= tileGrid.getMinZoom();\n      --z\n    ) {\n      const tileCoord = tileGrid.getTileCoordForCoordAndZ(coordinate, z);\n      const tile = source.getTile(\n        z,\n        tileCoord[1],\n        tileCoord[2],\n        pixelRatio,\n        projection\n      );\n      if (\n        !(tile instanceof ImageTile || tile instanceof ReprojTile) ||\n        (tile instanceof ReprojTile && tile.getState() === TileState.EMPTY)\n      ) {\n        return null;\n      }\n\n      if (tile.getState() !== TileState.LOADED) {\n        continue;\n      }\n\n      const tileOrigin = tileGrid.getOrigin(z);\n      const tileSize = toSize(tileGrid.getTileSize(z));\n      const tileResolution = tileGrid.getResolution(z);\n\n      const col = Math.floor(\n        tilePixelRatio *\n          ((coordinate[0] - tileOrigin[0]) / tileResolution -\n            tileCoord[1] * tileSize[0])\n      );\n\n      const row = Math.floor(\n        tilePixelRatio *\n          ((tileOrigin[1] - coordinate[1]) / tileResolution -\n            tileCoord[2] * tileSize[1])\n      );\n\n      const gutter = Math.round(\n        tilePixelRatio * source.getGutterForProjection(viewState.projection)\n      );\n\n      return this.getImageData(tile.getImage(), col + gutter, row + gutter);\n    }\n\n    return null;\n  }\n\n  /**\n   * @param {Object<number, Object<string, import(\"../../Tile.js\").default>>} tiles Lookup of loaded tiles by zoom level.\n   * @param {number} zoom Zoom level.\n   * @param {import(\"../../Tile.js\").default} tile Tile.\n   * @return {boolean|void} If `false`, the tile will not be considered loaded.\n   */\n  loadedTileCallback(tiles, zoom, tile) {\n    if (this.isDrawableTile(tile)) {\n      return super.loadedTileCallback(tiles, zoom, tile);\n    }\n    return false;\n  }\n\n  /**\n   * Determine whether render should be called.\n   * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n   * @return {boolean} Layer is ready to be rendered.\n   */\n  prepareFrame(frameState) {\n    return !!this.getLayer().getSource();\n  }\n\n  /**\n   * Render the layer.\n   * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n   * @param {HTMLElement} target Target that may be used to render content to.\n   * @return {HTMLElement} The rendered element.\n   */\n  renderFrame(frameState, target) {\n    const layerState = frameState.layerStatesArray[frameState.layerIndex];\n    const viewState = frameState.viewState;\n    const projection = viewState.projection;\n    const viewResolution = viewState.resolution;\n    const viewCenter = viewState.center;\n    const rotation = viewState.rotation;\n    const pixelRatio = frameState.pixelRatio;\n\n    const tileLayer = this.getLayer();\n    const tileSource = tileLayer.getSource();\n    const sourceRevision = tileSource.getRevision();\n    const tileGrid = tileSource.getTileGridForProjection(projection);\n    const z = tileGrid.getZForResolution(viewResolution, tileSource.zDirection);\n    const tileResolution = tileGrid.getResolution(z);\n\n    let extent = frameState.extent;\n    const resolution = frameState.viewState.resolution;\n    const tilePixelRatio = tileSource.getTilePixelRatio(pixelRatio);\n    // desired dimensions of the canvas in pixels\n    const width = Math.round((getWidth(extent) / resolution) * pixelRatio);\n    const height = Math.round((getHeight(extent) / resolution) * pixelRatio);\n\n    const layerExtent =\n      layerState.extent && fromUserExtent(layerState.extent, projection);\n    if (layerExtent) {\n      extent = getIntersection(\n        extent,\n        fromUserExtent(layerState.extent, projection)\n      );\n    }\n\n    const dx = (tileResolution * width) / 2 / tilePixelRatio;\n    const dy = (tileResolution * height) / 2 / tilePixelRatio;\n    const canvasExtent = [\n      viewCenter[0] - dx,\n      viewCenter[1] - dy,\n      viewCenter[0] + dx,\n      viewCenter[1] + dy,\n    ];\n\n    const tileRange = tileGrid.getTileRangeForExtentAndZ(extent, z);\n\n    /**\n     * @type {Object<number, Object<string, import(\"../../Tile.js\").default>>}\n     */\n    const tilesToDrawByZ = {};\n    tilesToDrawByZ[z] = {};\n\n    const findLoadedTiles = this.createLoadedTileFinder(\n      tileSource,\n      projection,\n      tilesToDrawByZ\n    );\n\n    const tmpExtent = this.tmpExtent;\n    const tmpTileRange = this.tmpTileRange_;\n    this.newTiles_ = false;\n    const viewport = rotation\n      ? getRotatedViewport(\n          viewState.center,\n          resolution,\n          rotation,\n          frameState.size\n        )\n      : undefined;\n    for (let x = tileRange.minX; x <= tileRange.maxX; ++x) {\n      for (let y = tileRange.minY; y <= tileRange.maxY; ++y) {\n        if (\n          rotation &&\n          !tileGrid.tileCoordIntersectsViewport([z, x, y], viewport)\n        ) {\n          continue;\n        }\n        const tile = this.getTile(z, x, y, frameState);\n        if (this.isDrawableTile(tile)) {\n          const uid = getUid(this);\n          if (tile.getState() == TileState.LOADED) {\n            tilesToDrawByZ[z][tile.tileCoord.toString()] = tile;\n            let inTransition = tile.inTransition(uid);\n            if (inTransition && layerState.opacity !== 1) {\n              // Skipping transition when layer is not fully opaque avoids visual artifacts.\n              tile.endTransition(uid);\n              inTransition = false;\n            }\n            if (\n              !this.newTiles_ &&\n              (inTransition || !this.renderedTiles.includes(tile))\n            ) {\n              this.newTiles_ = true;\n            }\n          }\n          if (tile.getAlpha(uid, frameState.time) === 1) {\n            // don't look for alt tiles if alpha is 1\n            continue;\n          }\n        }\n\n        const childTileRange = tileGrid.getTileCoordChildTileRange(\n          tile.tileCoord,\n          tmpTileRange,\n          tmpExtent\n        );\n\n        let covered = false;\n        if (childTileRange) {\n          covered = findLoadedTiles(z + 1, childTileRange);\n        }\n        if (!covered) {\n          tileGrid.forEachTileCoordParentTileRange(\n            tile.tileCoord,\n            findLoadedTiles,\n            tmpTileRange,\n            tmpExtent\n          );\n        }\n      }\n    }\n\n    const canvasScale =\n      ((tileResolution / viewResolution) * pixelRatio) / tilePixelRatio;\n\n    // set forward and inverse pixel transforms\n    composeTransform(\n      this.pixelTransform,\n      frameState.size[0] / 2,\n      frameState.size[1] / 2,\n      1 / pixelRatio,\n      1 / pixelRatio,\n      rotation,\n      -width / 2,\n      -height / 2\n    );\n\n    const canvasTransform = toTransformString(this.pixelTransform);\n\n    this.useContainer(target, canvasTransform, this.getBackground(frameState));\n    const context = this.context;\n    const canvas = context.canvas;\n\n    makeInverse(this.inversePixelTransform, this.pixelTransform);\n\n    // set scale transform for calculating tile positions on the canvas\n    composeTransform(\n      this.tempTransform,\n      width / 2,\n      height / 2,\n      canvasScale,\n      canvasScale,\n      0,\n      -width / 2,\n      -height / 2\n    );\n\n    if (canvas.width != width || canvas.height != height) {\n      canvas.width = width;\n      canvas.height = height;\n    } else if (!this.containerReused) {\n      context.clearRect(0, 0, width, height);\n    }\n\n    if (layerExtent) {\n      this.clipUnrotated(context, frameState, layerExtent);\n    }\n\n    if (!tileSource.getInterpolate()) {\n      context.imageSmoothingEnabled = false;\n    }\n\n    this.preRender(context, frameState);\n\n    this.renderedTiles.length = 0;\n    /** @type {Array<number>} */\n    let zs = Object.keys(tilesToDrawByZ).map(Number);\n    zs.sort(ascending);\n\n    let clips, clipZs, currentClip;\n    if (\n      layerState.opacity === 1 &&\n      (!this.containerReused ||\n        tileSource.getOpaque(frameState.viewState.projection))\n    ) {\n      zs = zs.reverse();\n    } else {\n      clips = [];\n      clipZs = [];\n    }\n    for (let i = zs.length - 1; i >= 0; --i) {\n      const currentZ = zs[i];\n      const currentTilePixelSize = tileSource.getTilePixelSize(\n        currentZ,\n        pixelRatio,\n        projection\n      );\n      const currentResolution = tileGrid.getResolution(currentZ);\n      const currentScale = currentResolution / tileResolution;\n      const dx = currentTilePixelSize[0] * currentScale * canvasScale;\n      const dy = currentTilePixelSize[1] * currentScale * canvasScale;\n      const originTileCoord = tileGrid.getTileCoordForCoordAndZ(\n        getTopLeft(canvasExtent),\n        currentZ\n      );\n      const originTileExtent = tileGrid.getTileCoordExtent(originTileCoord);\n      const origin = applyTransform(this.tempTransform, [\n        (tilePixelRatio * (originTileExtent[0] - canvasExtent[0])) /\n          tileResolution,\n        (tilePixelRatio * (canvasExtent[3] - originTileExtent[3])) /\n          tileResolution,\n      ]);\n      const tileGutter =\n        tilePixelRatio * tileSource.getGutterForProjection(projection);\n      const tilesToDraw = tilesToDrawByZ[currentZ];\n      for (const tileCoordKey in tilesToDraw) {\n        const tile = /** @type {import(\"../../ImageTile.js\").default} */ (\n          tilesToDraw[tileCoordKey]\n        );\n        const tileCoord = tile.tileCoord;\n\n        // Calculate integer positions and sizes so that tiles align\n        const xIndex = originTileCoord[1] - tileCoord[1];\n        const nextX = Math.round(origin[0] - (xIndex - 1) * dx);\n        const yIndex = originTileCoord[2] - tileCoord[2];\n        const nextY = Math.round(origin[1] - (yIndex - 1) * dy);\n        const x = Math.round(origin[0] - xIndex * dx);\n        const y = Math.round(origin[1] - yIndex * dy);\n        const w = nextX - x;\n        const h = nextY - y;\n        const transition = z === currentZ;\n\n        const inTransition =\n          transition && tile.getAlpha(getUid(this), frameState.time) !== 1;\n        let contextSaved = false;\n        if (!inTransition) {\n          if (clips) {\n            // Clip mask for regions in this tile that already filled by a higher z tile\n            currentClip = [x, y, x + w, y, x + w, y + h, x, y + h];\n            for (let i = 0, ii = clips.length; i < ii; ++i) {\n              if (z !== currentZ && currentZ < clipZs[i]) {\n                const clip = clips[i];\n                if (\n                  intersects(\n                    [x, y, x + w, y + h],\n                    [clip[0], clip[3], clip[4], clip[7]]\n                  )\n                ) {\n                  if (!contextSaved) {\n                    context.save();\n                    contextSaved = true;\n                  }\n                  context.beginPath();\n                  // counter-clockwise (outer ring) for current tile\n                  context.moveTo(currentClip[0], currentClip[1]);\n                  context.lineTo(currentClip[2], currentClip[3]);\n                  context.lineTo(currentClip[4], currentClip[5]);\n                  context.lineTo(currentClip[6], currentClip[7]);\n                  // clockwise (inner ring) for higher z tile\n                  context.moveTo(clip[6], clip[7]);\n                  context.lineTo(clip[4], clip[5]);\n                  context.lineTo(clip[2], clip[3]);\n                  context.lineTo(clip[0], clip[1]);\n                  context.clip();\n                }\n              }\n            }\n            clips.push(currentClip);\n            clipZs.push(currentZ);\n          } else {\n            context.clearRect(x, y, w, h);\n          }\n        }\n        this.drawTileImage(\n          tile,\n          frameState,\n          x,\n          y,\n          w,\n          h,\n          tileGutter,\n          transition\n        );\n        if (clips && !inTransition) {\n          if (contextSaved) {\n            context.restore();\n          }\n          this.renderedTiles.unshift(tile);\n        } else {\n          this.renderedTiles.push(tile);\n        }\n        this.updateUsedTiles(frameState.usedTiles, tileSource, tile);\n      }\n    }\n\n    this.renderedRevision = sourceRevision;\n    this.renderedResolution = tileResolution;\n    this.extentChanged =\n      !this.renderedExtent_ || !equals(this.renderedExtent_, canvasExtent);\n    this.renderedExtent_ = canvasExtent;\n    this.renderedPixelRatio = pixelRatio;\n    this.renderedProjection = projection;\n\n    this.manageTilePyramid(\n      frameState,\n      tileSource,\n      tileGrid,\n      pixelRatio,\n      projection,\n      extent,\n      z,\n      tileLayer.getPreload()\n    );\n    this.scheduleExpireCache(frameState, tileSource);\n\n    this.postRender(context, frameState);\n\n    if (layerState.extent) {\n      context.restore();\n    }\n    context.imageSmoothingEnabled = true;\n\n    if (canvasTransform !== canvas.style.transform) {\n      canvas.style.transform = canvasTransform;\n    }\n\n    return this.container;\n  }\n\n  /**\n   * @param {import(\"../../ImageTile.js\").default} tile Tile.\n   * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n   * @param {number} x Left of the tile.\n   * @param {number} y Top of the tile.\n   * @param {number} w Width of the tile.\n   * @param {number} h Height of the tile.\n   * @param {number} gutter Tile gutter.\n   * @param {boolean} transition Apply an alpha transition.\n   */\n  drawTileImage(tile, frameState, x, y, w, h, gutter, transition) {\n    const image = this.getTileImage(tile);\n    if (!image) {\n      return;\n    }\n    const uid = getUid(this);\n    const layerState = frameState.layerStatesArray[frameState.layerIndex];\n    const alpha =\n      layerState.opacity *\n      (transition ? tile.getAlpha(uid, frameState.time) : 1);\n    const alphaChanged = alpha !== this.context.globalAlpha;\n    if (alphaChanged) {\n      this.context.save();\n      this.context.globalAlpha = alpha;\n    }\n    this.context.drawImage(\n      image,\n      gutter,\n      gutter,\n      image.width - 2 * gutter,\n      image.height - 2 * gutter,\n      x,\n      y,\n      w,\n      h\n    );\n\n    if (alphaChanged) {\n      this.context.restore();\n    }\n    if (alpha !== layerState.opacity) {\n      frameState.animate = true;\n    } else if (transition) {\n      tile.endTransition(uid);\n    }\n  }\n\n  /**\n   * @return {HTMLCanvasElement} Image\n   */\n  getImage() {\n    const context = this.context;\n    return context ? context.canvas : null;\n  }\n\n  /**\n   * Get the image from a tile.\n   * @param {import(\"../../ImageTile.js\").default} tile Tile.\n   * @return {HTMLCanvasElement|HTMLImageElement|HTMLVideoElement} Image.\n   * @protected\n   */\n  getTileImage(tile) {\n    return tile.getImage();\n  }\n\n  /**\n   * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n   * @param {import(\"../../source/Tile.js\").default} tileSource Tile source.\n   * @protected\n   */\n  scheduleExpireCache(frameState, tileSource) {\n    if (tileSource.canExpireCache()) {\n      /**\n       * @param {import(\"../../source/Tile.js\").default} tileSource Tile source.\n       * @param {import(\"../../Map.js\").default} map Map.\n       * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n       */\n      const postRenderFunction = function (tileSource, map, frameState) {\n        const tileSourceKey = getUid(tileSource);\n        if (tileSourceKey in frameState.usedTiles) {\n          tileSource.expireCache(\n            frameState.viewState.projection,\n            frameState.usedTiles[tileSourceKey]\n          );\n        }\n      }.bind(null, tileSource);\n\n      frameState.postRenderFunctions.push(\n        /** @type {import(\"../../Map.js\").PostRenderFunction} */ (\n          postRenderFunction\n        )\n      );\n    }\n  }\n\n  /**\n   * @param {!Object<string, !Object<string, boolean>>} usedTiles Used tiles.\n   * @param {import(\"../../source/Tile.js\").default} tileSource Tile source.\n   * @param {import('../../Tile.js').default} tile Tile.\n   * @protected\n   */\n  updateUsedTiles(usedTiles, tileSource, tile) {\n    // FIXME should we use tilesToDrawByZ instead?\n    const tileSourceKey = getUid(tileSource);\n    if (!(tileSourceKey in usedTiles)) {\n      usedTiles[tileSourceKey] = {};\n    }\n    usedTiles[tileSourceKey][tile.getKey()] = true;\n  }\n\n  /**\n   * Manage tile pyramid.\n   * This function performs a number of functions related to the tiles at the\n   * current zoom and lower zoom levels:\n   * - registers idle tiles in frameState.wantedTiles so that they are not\n   *   discarded by the tile queue\n   * - enqueues missing tiles\n   * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n   * @param {import(\"../../source/Tile.js\").default} tileSource Tile source.\n   * @param {import(\"../../tilegrid/TileGrid.js\").default} tileGrid Tile grid.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {import(\"../../proj/Projection.js\").default} projection Projection.\n   * @param {import(\"../../extent.js\").Extent} extent Extent.\n   * @param {number} currentZ Current Z.\n   * @param {number} preload Load low resolution tiles up to `preload` levels.\n   * @param {function(import(\"../../Tile.js\").default):void} [tileCallback] Tile callback.\n   * @protected\n   */\n  manageTilePyramid(\n    frameState,\n    tileSource,\n    tileGrid,\n    pixelRatio,\n    projection,\n    extent,\n    currentZ,\n    preload,\n    tileCallback\n  ) {\n    const tileSourceKey = getUid(tileSource);\n    if (!(tileSourceKey in frameState.wantedTiles)) {\n      frameState.wantedTiles[tileSourceKey] = {};\n    }\n    const wantedTiles = frameState.wantedTiles[tileSourceKey];\n    const tileQueue = frameState.tileQueue;\n    const minZoom = tileGrid.getMinZoom();\n    const rotation = frameState.viewState.rotation;\n    const viewport = rotation\n      ? getRotatedViewport(\n          frameState.viewState.center,\n          frameState.viewState.resolution,\n          rotation,\n          frameState.size\n        )\n      : undefined;\n    let tileCount = 0;\n    let tile, tileRange, tileResolution, x, y, z;\n    for (z = minZoom; z <= currentZ; ++z) {\n      tileRange = tileGrid.getTileRangeForExtentAndZ(extent, z, tileRange);\n      tileResolution = tileGrid.getResolution(z);\n      for (x = tileRange.minX; x <= tileRange.maxX; ++x) {\n        for (y = tileRange.minY; y <= tileRange.maxY; ++y) {\n          if (\n            rotation &&\n            !tileGrid.tileCoordIntersectsViewport([z, x, y], viewport)\n          ) {\n            continue;\n          }\n          if (currentZ - z <= preload) {\n            ++tileCount;\n            tile = tileSource.getTile(z, x, y, pixelRatio, projection);\n            if (tile.getState() == TileState.IDLE) {\n              wantedTiles[tile.getKey()] = true;\n              if (!tileQueue.isKeyQueued(tile.getKey())) {\n                tileQueue.enqueue([\n                  tile,\n                  tileSourceKey,\n                  tileGrid.getTileCoordCenter(tile.tileCoord),\n                  tileResolution,\n                ]);\n              }\n            }\n            if (tileCallback !== undefined) {\n              tileCallback(tile);\n            }\n          } else {\n            tileSource.useTile(z, x, y, projection);\n          }\n        }\n      }\n    }\n    tileSource.updateCacheSize(tileCount, projection);\n  }\n}\n\nexport default CanvasTileLayerRenderer;\n","/**\n * @module ol/layer/Tile\n */\nimport BaseTileLayer from './BaseTile.js';\nimport CanvasTileLayerRenderer from '../renderer/canvas/TileLayer.js';\n\n/**\n * @classdesc\n * For layer sources that provide pre-rendered, tiled images in grids that are\n * organized by zoom levels for specific resolutions.\n * Note that any property set in the options is set as a {@link module:ol/Object~BaseObject}\n * property on the layer object; for example, setting `title: 'My Title'` in the\n * options means that `title` is observable, and has get/set accessors.\n *\n * @template {import(\"../source/Tile.js\").default} TileSourceType\n * @extends BaseTileLayer<TileSourceType, CanvasTileLayerRenderer>\n * @api\n */\nclass TileLayer extends BaseTileLayer {\n  /**\n   * @param {import(\"./BaseTile.js\").Options<TileSourceType>} [options] Tile layer options.\n   */\n  constructor(options) {\n    super(options);\n  }\n\n  createRenderer() {\n    return new CanvasTileLayerRenderer(this);\n  }\n}\n\nexport default TileLayer;\n","/**\n * @module ol/source/Raster\n */\nimport Disposable from '../Disposable.js';\nimport Event from '../events/Event.js';\nimport EventType from '../events/EventType.js';\nimport ImageCanvas from '../ImageCanvas.js';\nimport ImageLayer from '../layer/Image.js';\nimport ImageSource from './Image.js';\nimport Source from './Source.js';\nimport TileLayer from '../layer/Tile.js';\nimport TileQueue from '../TileQueue.js';\nimport TileSource from './Tile.js';\nimport {createCanvasContext2D} from '../dom.js';\nimport {create as createTransform} from '../transform.js';\nimport {equals, getCenter, getHeight, getWidth} from '../extent.js';\nimport {getUid} from '../util.js';\n\nconst resolve = Promise.resolve();\n\nlet hasImageData = true;\ntry {\n  new ImageData(10, 10);\n} catch (_) {\n  hasImageData = false;\n}\n\n/** @type {CanvasRenderingContext2D} */\nlet context;\n\n/**\n * @param {Uint8ClampedArray} data Image data.\n * @param {number} width Number of columns.\n * @param {number} height Number of rows.\n * @return {ImageData} Image data.\n */\nexport function newImageData(data, width, height) {\n  if (hasImageData) {\n    return new ImageData(data, width, height);\n  }\n\n  if (!context) {\n    context = document.createElement('canvas').getContext('2d');\n  }\n  const imageData = context.createImageData(width, height);\n  imageData.data.set(data);\n  return imageData;\n}\n\n/**\n * @typedef {Object} MinionData\n * @property {Array<ArrayBuffer>} buffers Array of buffers.\n * @property {Object} meta Operation metadata.\n * @property {boolean} imageOps The operation is an image operation.\n * @property {number} width The width of the image.\n * @property {number} height The height of the image.\n */\n\n/* istanbul ignore next */\n/**\n * Create a function for running operations.  This function is serialized for\n * use in a worker.\n * @param {function(Array, Object):*} operation The operation.\n * @return {function(MinionData):ArrayBuffer} A function that takes an object with\n * buffers, meta, imageOps, width, and height properties and returns an array\n * buffer.\n */\nfunction createMinion(operation) {\n  let workerHasImageData = true;\n  try {\n    new ImageData(10, 10);\n  } catch (_) {\n    workerHasImageData = false;\n  }\n\n  function newWorkerImageData(data, width, height) {\n    if (workerHasImageData) {\n      return new ImageData(data, width, height);\n    }\n    return {data: data, width: width, height: height};\n  }\n\n  return function (data) {\n    // bracket notation for minification support\n    const buffers = data['buffers'];\n    const meta = data['meta'];\n    const imageOps = data['imageOps'];\n    const width = data['width'];\n    const height = data['height'];\n\n    const numBuffers = buffers.length;\n    const numBytes = buffers[0].byteLength;\n\n    if (imageOps) {\n      const images = new Array(numBuffers);\n      for (let b = 0; b < numBuffers; ++b) {\n        images[b] = newWorkerImageData(\n          new Uint8ClampedArray(buffers[b]),\n          width,\n          height\n        );\n      }\n      const output = operation(images, meta).data;\n      return output.buffer;\n    }\n\n    const output = new Uint8ClampedArray(numBytes);\n    const arrays = new Array(numBuffers);\n    const pixels = new Array(numBuffers);\n    for (let b = 0; b < numBuffers; ++b) {\n      arrays[b] = new Uint8ClampedArray(buffers[b]);\n      pixels[b] = [0, 0, 0, 0];\n    }\n    for (let i = 0; i < numBytes; i += 4) {\n      for (let j = 0; j < numBuffers; ++j) {\n        const array = arrays[j];\n        pixels[j][0] = array[i];\n        pixels[j][1] = array[i + 1];\n        pixels[j][2] = array[i + 2];\n        pixels[j][3] = array[i + 3];\n      }\n      const pixel = operation(pixels, meta);\n      output[i] = pixel[0];\n      output[i + 1] = pixel[1];\n      output[i + 2] = pixel[2];\n      output[i + 3] = pixel[3];\n    }\n    return output.buffer;\n  };\n}\n\n/**\n * Create a worker for running operations.\n * @param {ProcessorOptions} config Processor options.\n * @param {function(MessageEvent): void} onMessage Called with a message event.\n * @return {Worker} The worker.\n */\nfunction createWorker(config, onMessage) {\n  const lib = Object.keys(config.lib || {}).map(function (name) {\n    return 'const ' + name + ' = ' + config.lib[name].toString() + ';';\n  });\n\n  const lines = lib.concat([\n    'const __minion__ = (' + createMinion.toString() + ')(',\n    config.operation.toString(),\n    ');',\n    'self.addEventListener(\"message\", function(event) {',\n    '  const buffer = __minion__(event.data);',\n    '  self.postMessage({buffer: buffer, meta: event.data.meta}, [buffer]);',\n    '});',\n  ]);\n\n  const worker = new Worker(\n    typeof Blob === 'undefined'\n      ? 'data:text/javascript;base64,' +\n        Buffer.from(lines.join('\\n'), 'binary').toString('base64')\n      : URL.createObjectURL(new Blob(lines, {type: 'text/javascript'}))\n  );\n  worker.addEventListener('message', onMessage);\n  return worker;\n}\n\n/**\n * @typedef {Object} FauxMessageEvent\n * @property {Object} data Message data.\n */\n\n/**\n * Create a faux worker for running operations.\n * @param {ProcessorOptions} config Configuration.\n * @param {function(FauxMessageEvent): void} onMessage Called with a message event.\n * @return {Object} The faux worker.\n */\nfunction createFauxWorker(config, onMessage) {\n  const minion = createMinion(config.operation);\n  let terminated = false;\n  return {\n    postMessage: function (data) {\n      setTimeout(function () {\n        if (terminated) {\n          return;\n        }\n        onMessage({data: {buffer: minion(data), meta: data['meta']}});\n      }, 0);\n    },\n    terminate: function () {\n      terminated = true;\n    },\n  };\n}\n\n/**\n * @typedef {function(Error, ImageData, (Object|Array<Object>)): void} JobCallback\n */\n\n/**\n * @typedef {Object} Job\n * @property {Object} meta Job metadata.\n * @property {Array<ImageData>} inputs Array of input data.\n * @property {JobCallback} callback Called when the job is complete.\n */\n\n/**\n * @typedef {Object} ProcessorOptions\n * @property {number} threads Number of workers to spawn.\n * @property {Operation} operation The operation.\n * @property {Object<string, Function>} [lib] Functions that will be made available to operations run in a worker.\n * @property {number} queue The number of queued jobs to allow.\n * @property {boolean} [imageOps=false] Pass all the image data to the operation instead of a single pixel.\n */\n\n/**\n * @classdesc\n * A processor runs pixel or image operations in workers.\n */\nexport class Processor extends Disposable {\n  /**\n   * @param {ProcessorOptions} config Configuration.\n   */\n  constructor(config) {\n    super();\n\n    this._imageOps = !!config.imageOps;\n    let threads;\n    if (config.threads === 0) {\n      threads = 0;\n    } else if (this._imageOps) {\n      threads = 1;\n    } else {\n      threads = config.threads || 1;\n    }\n\n    /**\n     * @type {Array<Worker>}\n     */\n    const workers = new Array(threads);\n    if (threads) {\n      for (let i = 0; i < threads; ++i) {\n        workers[i] = createWorker(config, this._onWorkerMessage.bind(this, i));\n      }\n    } else {\n      workers[0] = createFauxWorker(\n        config,\n        this._onWorkerMessage.bind(this, 0)\n      );\n    }\n    this._workers = workers;\n\n    /**\n     * @type {Array<Job>}\n     * @private\n     */\n    this._queue = [];\n\n    this._maxQueueLength = config.queue || Infinity;\n    this._running = 0;\n\n    /**\n     * @type {Object<number, any>}\n     * @private\n     */\n    this._dataLookup = {};\n\n    /**\n     * @type {Job}\n     * @private\n     */\n    this._job = null;\n  }\n\n  /**\n   * Run operation on input data.\n   * @param {Array<ImageData>} inputs Array of image data.\n   * @param {Object} meta A user data object.  This is passed to all operations\n   *     and must be serializable.\n   * @param {function(Error, ImageData, Object): void} callback Called when work\n   *     completes.  The first argument is any error.  The second is the ImageData\n   *     generated by operations.  The third is the user data object.\n   */\n  process(inputs, meta, callback) {\n    this._enqueue({\n      inputs: inputs,\n      meta: meta,\n      callback: callback,\n    });\n    this._dispatch();\n  }\n\n  /**\n   * Add a job to the queue.\n   * @param {Job} job The job.\n   */\n  _enqueue(job) {\n    this._queue.push(job);\n    while (this._queue.length > this._maxQueueLength) {\n      this._queue.shift().callback(null, null);\n    }\n  }\n\n  /**\n   * Dispatch a job.\n   */\n  _dispatch() {\n    if (this._running || this._queue.length === 0) {\n      return;\n    }\n\n    const job = this._queue.shift();\n    this._job = job;\n    const width = job.inputs[0].width;\n    const height = job.inputs[0].height;\n    const buffers = job.inputs.map(function (input) {\n      return input.data.buffer;\n    });\n    const threads = this._workers.length;\n    this._running = threads;\n    if (threads === 1) {\n      this._workers[0].postMessage(\n        {\n          buffers: buffers,\n          meta: job.meta,\n          imageOps: this._imageOps,\n          width: width,\n          height: height,\n        },\n        buffers\n      );\n      return;\n    }\n\n    const length = job.inputs[0].data.length;\n    const segmentLength = 4 * Math.ceil(length / 4 / threads);\n    for (let i = 0; i < threads; ++i) {\n      const offset = i * segmentLength;\n      const slices = [];\n      for (let j = 0, jj = buffers.length; j < jj; ++j) {\n        slices.push(buffers[j].slice(offset, offset + segmentLength));\n      }\n      this._workers[i].postMessage(\n        {\n          buffers: slices,\n          meta: job.meta,\n          imageOps: this._imageOps,\n          width: width,\n          height: height,\n        },\n        slices\n      );\n    }\n  }\n\n  /**\n   * Handle messages from the worker.\n   * @param {number} index The worker index.\n   * @param {MessageEvent} event The message event.\n   */\n  _onWorkerMessage(index, event) {\n    if (this.disposed) {\n      return;\n    }\n    this._dataLookup[index] = event.data;\n    --this._running;\n    if (this._running === 0) {\n      this._resolveJob();\n    }\n  }\n\n  /**\n   * Resolve a job.  If there are no more worker threads, the processor callback\n   * will be called.\n   */\n  _resolveJob() {\n    const job = this._job;\n    const threads = this._workers.length;\n    let data, meta;\n    if (threads === 1) {\n      data = new Uint8ClampedArray(this._dataLookup[0]['buffer']);\n      meta = this._dataLookup[0]['meta'];\n    } else {\n      const length = job.inputs[0].data.length;\n      data = new Uint8ClampedArray(length);\n      meta = new Array(threads);\n      const segmentLength = 4 * Math.ceil(length / 4 / threads);\n      for (let i = 0; i < threads; ++i) {\n        const buffer = this._dataLookup[i]['buffer'];\n        const offset = i * segmentLength;\n        data.set(new Uint8ClampedArray(buffer), offset);\n        meta[i] = this._dataLookup[i]['meta'];\n      }\n    }\n    this._job = null;\n    this._dataLookup = {};\n    job.callback(\n      null,\n      newImageData(data, job.inputs[0].width, job.inputs[0].height),\n      meta\n    );\n    this._dispatch();\n  }\n\n  /**\n   * Terminate all workers associated with the processor.\n   */\n  disposeInternal() {\n    for (let i = 0; i < this._workers.length; ++i) {\n      this._workers[i].terminate();\n    }\n    this._workers.length = 0;\n  }\n}\n\n/**\n * A function that takes an array of input data, performs some operation, and\n * returns an array of output data.\n * For `pixel` type operations, the function will be called with an array of\n * pixels, where each pixel is an array of four numbers (`[r, g, b, a]`) in the\n * range of 0 - 255. It should return a single pixel array.\n * For `'image'` type operations, functions will be called with an array of\n * [ImageData](https://developer.mozilla.org/en-US/docs/Web/API/ImageData)\n * and should return a single\n * [ImageData](https://developer.mozilla.org/en-US/docs/Web/API/ImageData).\n * The operations\n * are called with a second \"data\" argument, which can be used for storage.  The\n * data object is accessible from raster events, where it can be initialized in\n * \"beforeoperations\" and accessed again in \"afteroperations\".\n *\n * @typedef {function((Array<Array<number>>|Array<ImageData>), Object):\n *     (Array<number>|ImageData)} Operation\n */\n\n/**\n * @enum {string}\n */\nconst RasterEventType = {\n  /**\n   * Triggered before operations are run.  Listeners will receive an event object with\n   * a `data` property that can be used to make data available to operations.\n   * @event module:ol/source/Raster.RasterSourceEvent#beforeoperations\n   * @api\n   */\n  BEFOREOPERATIONS: 'beforeoperations',\n\n  /**\n   * Triggered after operations are run.  Listeners will receive an event object with\n   * a `data` property.  If more than one thread is used, `data` will be an array of\n   * objects.  If a single thread is used, `data` will be a single object.\n   * @event module:ol/source/Raster.RasterSourceEvent#afteroperations\n   * @api\n   */\n  AFTEROPERATIONS: 'afteroperations',\n};\n\n/**\n * @typedef {'pixel' | 'image'} RasterOperationType\n * Raster operation type. Supported values are `'pixel'` and `'image'`.\n */\n\n/**\n * @typedef {import(\"./Image.js\").ImageSourceEventTypes|'beforeoperations'|'afteroperations'} RasterSourceEventTypes\n */\n\n/**\n * @classdesc\n * Events emitted by {@link module:ol/source/Raster~RasterSource} instances are instances of this\n * type.\n */\nexport class RasterSourceEvent extends Event {\n  /**\n   * @param {string} type Type.\n   * @param {import(\"../Map.js\").FrameState} frameState The frame state.\n   * @param {Object|Array<Object>} data An object made available to operations.  For \"afteroperations\" evenets\n   * this will be an array of objects if more than one thread is used.\n   */\n  constructor(type, frameState, data) {\n    super(type);\n\n    /**\n     * The raster extent.\n     * @type {import(\"../extent.js\").Extent}\n     * @api\n     */\n    this.extent = frameState.extent;\n\n    /**\n     * The pixel resolution (map units per pixel).\n     * @type {number}\n     * @api\n     */\n    this.resolution = frameState.viewState.resolution / frameState.pixelRatio;\n\n    /**\n     * An object made available to all operations.  This can be used by operations\n     * as a storage object (e.g. for calculating statistics).\n     * @type {Object}\n     * @api\n     */\n    this.data = data;\n  }\n}\n\n/**\n * @typedef {Object} Options\n * @property {Array<import(\"./Source.js\").default|import(\"../layer/Layer.js\").default>} sources Input\n * sources or layers.  For vector data, use an VectorImage layer.\n * @property {Operation} [operation] Raster operation.\n * The operation will be called with data from input sources\n * and the output will be assigned to the raster source.\n * @property {Object} [lib] Functions that will be made available to operations run in a worker.\n * @property {number} [threads] By default, operations will be run in a single worker thread.\n * To avoid using workers altogether, set `threads: 0`.  For pixel operations, operations can\n * be run in multiple worker threads.  Note that there is additional overhead in\n * transferring data to multiple workers, and that depending on the user's\n * system, it may not be possible to parallelize the work.\n * @property {RasterOperationType} [operationType='pixel'] Operation type.\n * Supported values are `'pixel'` and `'image'`.  By default,\n * `'pixel'` operations are assumed, and operations will be called with an\n * array of pixels from input sources.  If set to `'image'`, operations will\n * be called with an array of ImageData objects from input sources.\n * @property {Array<number>|null} [resolutions] Resolutions. If specified, raster operations will only\n * be run at the given resolutions.  By default, the resolutions of the first source with resolutions\n * specified will be used, if any. Set to `null` to use any view resolution instead.\n */\n\n/***\n * @template Return\n * @typedef {import(\"../Observable\").OnSignature<import(\"../Observable\").EventTypes, import(\"../events/Event.js\").default, Return> &\n *   import(\"../Observable\").OnSignature<import(\"../ObjectEventType\").Types, import(\"../Object\").ObjectEvent, Return> &\n *   import(\"../Observable\").OnSignature<import(\"./Image.js\").ImageSourceEventTypes, import(\"./Image.js\").ImageSourceEvent, Return> &\n *   import(\"../Observable\").OnSignature<RasterSourceEventTypes, RasterSourceEvent, Return> &\n *   import(\"../Observable\").CombinedOnSignature<import(\"../Observable\").EventTypes|import(\"../ObjectEventType\").Types\n *     |RasterSourceEventTypes, Return>} RasterSourceOnSignature\n */\n\n/**\n * @classdesc\n * A source that transforms data from any number of input sources using an\n * {@link module:ol/source/Raster~Operation} function to transform input pixel values into\n * output pixel values.\n *\n * @fires module:ol/source/Raster.RasterSourceEvent\n * @api\n */\nclass RasterSource extends ImageSource {\n  /**\n   * @param {Options} options Options.\n   */\n  constructor(options) {\n    super({\n      projection: null,\n    });\n\n    /***\n     * @type {RasterSourceOnSignature<import(\"../events\").EventsKey>}\n     */\n    this.on;\n\n    /***\n     * @type {RasterSourceOnSignature<import(\"../events\").EventsKey>}\n     */\n    this.once;\n\n    /***\n     * @type {RasterSourceOnSignature<void>}\n     */\n    this.un;\n\n    /**\n     * @private\n     * @type {Processor}\n     */\n    this.processor_ = null;\n\n    /**\n     * @private\n     * @type {RasterOperationType}\n     */\n    this.operationType_ =\n      options.operationType !== undefined ? options.operationType : 'pixel';\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.threads_ = options.threads !== undefined ? options.threads : 1;\n\n    /**\n     * @private\n     * @type {Array<import(\"../layer/Layer.js\").default>}\n     */\n    this.layers_ = createLayers(options.sources);\n\n    const changed = this.changed.bind(this);\n    for (let i = 0, ii = this.layers_.length; i < ii; ++i) {\n      this.layers_[i].addEventListener(EventType.CHANGE, changed);\n    }\n\n    /** @type {boolean} */\n    this.useResolutions_ = options.resolutions !== null;\n\n    /**\n     * @private\n     * @type {import(\"../TileQueue.js\").default}\n     */\n    this.tileQueue_ = new TileQueue(() => 1, changed);\n\n    /**\n     * The most recently requested frame state.\n     * @type {import(\"../Map.js\").FrameState}\n     * @private\n     */\n    this.requestedFrameState_;\n\n    /**\n     * The most recently rendered image canvas.\n     * @type {import(\"../ImageCanvas.js\").default}\n     * @private\n     */\n    this.renderedImageCanvas_ = null;\n\n    /**\n     * The most recently rendered revision.\n     * @type {number}\n     */\n    this.renderedRevision_;\n\n    /**\n     * @private\n     * @type {import(\"../Map.js\").FrameState}\n     */\n    this.frameState_ = {\n      animate: false,\n      coordinateToPixelTransform: createTransform(),\n      declutterTree: null,\n      extent: null,\n      index: 0,\n      layerIndex: 0,\n      layerStatesArray: getLayerStatesArray(this.layers_),\n      pixelRatio: 1,\n      pixelToCoordinateTransform: createTransform(),\n      postRenderFunctions: [],\n      size: [0, 0],\n      tileQueue: this.tileQueue_,\n      time: Date.now(),\n      usedTiles: {},\n      viewState: /** @type {import(\"../View.js\").State} */ ({\n        rotation: 0,\n      }),\n      viewHints: [],\n      wantedTiles: {},\n      mapId: getUid(this),\n      renderTargets: {},\n    };\n\n    this.setAttributions(function (frameState) {\n      const attributions = [];\n      for (\n        let index = 0, iMax = options.sources.length;\n        index < iMax;\n        ++index\n      ) {\n        const sourceOrLayer = options.sources[index];\n        const source =\n          sourceOrLayer instanceof Source\n            ? sourceOrLayer\n            : sourceOrLayer.getSource();\n        if (!source) {\n          continue;\n        }\n        const attributionGetter = source.getAttributions();\n        if (typeof attributionGetter === 'function') {\n          const sourceAttribution = attributionGetter(frameState);\n          attributions.push.apply(attributions, sourceAttribution);\n        }\n      }\n      return attributions.length !== 0 ? attributions : null;\n    });\n\n    if (options.operation !== undefined) {\n      this.setOperation(options.operation, options.lib);\n    }\n  }\n\n  changed() {\n    this.processSources_().then(() => super.changed());\n  }\n\n  /**\n   * Set the operation.\n   * @param {Operation} operation New operation.\n   * @param {Object} [lib] Functions that will be available to operations run\n   *     in a worker.\n   * @api\n   */\n  setOperation(operation, lib) {\n    if (this.processor_) {\n      this.processor_.dispose();\n    }\n\n    this.processor_ = new Processor({\n      operation: operation,\n      imageOps: this.operationType_ === 'image',\n      queue: 1,\n      lib: lib,\n      threads: this.threads_,\n    });\n    this.changed();\n  }\n\n  /**\n   * Update the stored frame state.\n   * @param {import(\"../extent.js\").Extent} extent The view extent (in map units).\n   * @param {number} resolution The view resolution.\n   * @param {import(\"../proj/Projection.js\").default} projection The view projection.\n   * @return {import(\"../Map.js\").FrameState} The updated frame state.\n   * @private\n   */\n  updateFrameState_(extent, resolution, projection) {\n    const frameState = /** @type {import(\"../Map.js\").FrameState} */ (\n      Object.assign({}, this.frameState_)\n    );\n\n    frameState.viewState = /** @type {import(\"../View.js\").State} */ (\n      Object.assign({}, frameState.viewState)\n    );\n\n    const center = getCenter(extent);\n\n    frameState.size[0] = Math.ceil(getWidth(extent) / resolution);\n    frameState.size[1] = Math.ceil(getHeight(extent) / resolution);\n    frameState.extent = [\n      center[0] - (frameState.size[0] * resolution) / 2,\n      center[1] - (frameState.size[1] * resolution) / 2,\n      center[0] + (frameState.size[0] * resolution) / 2,\n      center[1] + (frameState.size[1] * resolution) / 2,\n    ];\n    frameState.time = Date.now();\n\n    const viewState = frameState.viewState;\n    viewState.center = center;\n    viewState.projection = projection;\n    viewState.resolution = resolution;\n    return frameState;\n  }\n\n  /**\n   * Determine if all sources are ready.\n   * @return {boolean} All sources are ready.\n   * @private\n   */\n  allSourcesReady_() {\n    let ready = true;\n    let source;\n    for (let i = 0, ii = this.layers_.length; i < ii; ++i) {\n      source = this.layers_[i].getSource();\n      if (!source || source.getState() !== 'ready') {\n        ready = false;\n        break;\n      }\n    }\n    return ready;\n  }\n\n  /**\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @param {number} resolution Resolution.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   * @return {import(\"../ImageCanvas.js\").default} Single image.\n   */\n  getImage(extent, resolution, pixelRatio, projection) {\n    if (!this.allSourcesReady_()) {\n      return null;\n    }\n\n    this.tileQueue_.loadMoreTiles(16, 16);\n\n    resolution = this.findNearestResolution(resolution);\n    const frameState = this.updateFrameState_(extent, resolution, projection);\n    this.requestedFrameState_ = frameState;\n\n    const canvas = this.renderedImageCanvas_;\n\n    // check if we can't reuse the existing ol/ImageCanvas\n    if (canvas) {\n      const renderedResolution = canvas.getResolution();\n      const renderedExtent = canvas.getExtent();\n      if (\n        resolution !== renderedResolution ||\n        !equals(frameState.extent, renderedExtent)\n      ) {\n        this.renderedImageCanvas_ = null;\n      }\n    }\n\n    if (\n      !this.renderedImageCanvas_ ||\n      this.getRevision() !== this.renderedRevision_\n    ) {\n      this.changed();\n    }\n\n    if (frameState.animate) {\n      requestAnimationFrame(this.changed.bind(this));\n    }\n\n    return canvas;\n  }\n\n  /**\n   * Start processing source data.\n   * @return {Promise<void>} Promise resolving when the worker result is available.\n   * @private\n   */\n  processSources_() {\n    const frameState = this.requestedFrameState_;\n    if (!frameState) {\n      return resolve;\n    }\n    const len = this.layers_.length;\n    const imageDatas = new Array(len);\n    for (let i = 0; i < len; ++i) {\n      frameState.layerIndex = i;\n      frameState.renderTargets = {};\n      const imageData = getImageData(this.layers_[i], frameState);\n      if (imageData) {\n        imageDatas[i] = imageData;\n      } else {\n        return resolve;\n      }\n    }\n\n    const data = {};\n    this.dispatchEvent(\n      new RasterSourceEvent(RasterEventType.BEFOREOPERATIONS, frameState, data)\n    );\n    return new Promise((resolve) =>\n      this.processor_.process(imageDatas, data, (error, output, data) => {\n        this.onWorkerComplete_(frameState, error, output, data);\n        resolve();\n      })\n    );\n  }\n\n  /**\n   * Called when pixel processing is complete.\n   * @param {import(\"../Map.js\").FrameState} frameState The frame state.\n   * @param {Error} err Any error during processing.\n   * @param {ImageData} output The output image data.\n   * @param {Object|Array<Object>} data The user data (or an array if more than one thread).\n   * @private\n   */\n  onWorkerComplete_(frameState, err, output, data) {\n    if (err || !output) {\n      return;\n    }\n\n    // do nothing if extent or resolution changed\n    const extent = frameState.extent;\n    const resolution = frameState.viewState.resolution;\n    if (\n      resolution === this.requestedFrameState_.viewState.resolution &&\n      equals(extent, this.requestedFrameState_.extent)\n    ) {\n      let context;\n      if (this.renderedImageCanvas_) {\n        context = this.renderedImageCanvas_.getImage().getContext('2d');\n      } else {\n        const width = Math.round(getWidth(extent) / resolution);\n        const height = Math.round(getHeight(extent) / resolution);\n        context = createCanvasContext2D(width, height);\n        this.renderedImageCanvas_ = new ImageCanvas(\n          extent,\n          resolution,\n          1,\n          context.canvas\n        );\n      }\n      context.putImageData(output, 0, 0);\n      this.renderedRevision_ = this.getRevision();\n\n      this.dispatchEvent(\n        new RasterSourceEvent(RasterEventType.AFTEROPERATIONS, frameState, data)\n      );\n    }\n\n    this.changed();\n  }\n\n  /**\n   * @param {import(\"../proj/Projection\").default} [projection] Projection.\n   * @return {Array<number>|null} Resolutions.\n   */\n  getResolutions(projection) {\n    if (!this.useResolutions_) {\n      return null;\n    }\n    let resolutions = super.getResolutions();\n    if (!resolutions) {\n      for (let i = 0, ii = this.layers_.length; i < ii; ++i) {\n        const source = this.layers_[i].getSource();\n        resolutions = source.getResolutions(projection);\n        if (resolutions) {\n          break;\n        }\n      }\n    }\n    return resolutions;\n  }\n\n  disposeInternal() {\n    if (this.processor_) {\n      this.processor_.dispose();\n    }\n    super.disposeInternal();\n  }\n}\n\n/**\n * Clean up and unregister the worker.\n * @function\n * @api\n */\nRasterSource.prototype.dispose;\n\n/**\n * A reusable canvas context.\n * @type {CanvasRenderingContext2D}\n * @private\n */\nlet sharedContext = null;\n\n/**\n * Get image data from a layer.\n * @param {import(\"../layer/Layer.js\").default} layer Layer to render.\n * @param {import(\"../Map.js\").FrameState} frameState The frame state.\n * @return {ImageData} The image data.\n */\nfunction getImageData(layer, frameState) {\n  const renderer = layer.getRenderer();\n  if (!renderer) {\n    throw new Error('Unsupported layer type: ' + layer);\n  }\n\n  if (!renderer.prepareFrame(frameState)) {\n    return null;\n  }\n  const width = frameState.size[0];\n  const height = frameState.size[1];\n  if (width === 0 || height === 0) {\n    return null;\n  }\n  const container = renderer.renderFrame(frameState, null);\n  let element;\n  if (container instanceof HTMLCanvasElement) {\n    element = container;\n  } else {\n    if (container) {\n      element = container.firstElementChild;\n    }\n    if (!(element instanceof HTMLCanvasElement)) {\n      throw new Error('Unsupported rendered element: ' + element);\n    }\n    if (element.width === width && element.height === height) {\n      const context = element.getContext('2d');\n      return context.getImageData(0, 0, width, height);\n    }\n  }\n\n  if (!sharedContext) {\n    sharedContext = createCanvasContext2D(width, height, undefined, {\n      willReadFrequently: true,\n    });\n  } else {\n    const canvas = sharedContext.canvas;\n    if (canvas.width !== width || canvas.height !== height) {\n      sharedContext = createCanvasContext2D(width, height, undefined, {\n        willReadFrequently: true,\n      });\n    } else {\n      sharedContext.clearRect(0, 0, width, height);\n    }\n  }\n  sharedContext.drawImage(element, 0, 0, width, height);\n  return sharedContext.getImageData(0, 0, width, height);\n}\n\n/**\n * Get a list of layer states from a list of layers.\n * @param {Array<import(\"../layer/Layer.js\").default>} layers Layers.\n * @return {Array<import(\"../layer/Layer.js\").State>} The layer states.\n */\nfunction getLayerStatesArray(layers) {\n  return layers.map(function (layer) {\n    return layer.getLayerState();\n  });\n}\n\n/**\n * Create layers for all sources.\n * @param {Array<import(\"./Source.js\").default|import(\"../layer/Layer.js\").default>} sources The sources.\n * @return {Array<import(\"../layer/Layer.js\").default>} Array of layers.\n */\nfunction createLayers(sources) {\n  const len = sources.length;\n  const layers = new Array(len);\n  for (let i = 0; i < len; ++i) {\n    layers[i] = createLayer(sources[i]);\n  }\n  return layers;\n}\n\n/**\n * Create a layer for the provided source.\n * @param {import(\"./Source.js\").default|import(\"../layer/Layer.js\").default} layerOrSource The layer or source.\n * @return {import(\"../layer/Layer.js\").default} The layer.\n */\nfunction createLayer(layerOrSource) {\n  // @type {import(\"../layer/Layer.js\").default}\n  let layer;\n  if (layerOrSource instanceof Source) {\n    if (layerOrSource instanceof TileSource) {\n      layer = new TileLayer({source: layerOrSource});\n    } else if (layerOrSource instanceof ImageSource) {\n      layer = new ImageLayer({source: layerOrSource});\n    }\n  } else {\n    layer = layerOrSource;\n  }\n  return layer;\n}\n\nexport default RasterSource;\n","/**\n * @module ol/source/Stamen\n */\n\nimport XYZ from './XYZ.js';\nimport {ATTRIBUTION as OSM_ATTRIBUTION} from './OSM.js';\n\n/**\n * @const\n * @type {Array<string>}\n */\nconst ATTRIBUTIONS = [\n  'Map tiles by <a href=\"https://stamen.com/\" target=\"_blank\">Stamen Design</a>, ' +\n    'under <a href=\"https://creativecommons.org/licenses/by/3.0/\" target=\"_blank\">CC BY' +\n    ' 3.0</a>.',\n  OSM_ATTRIBUTION,\n];\n\n/**\n * @type {Object<string, {extension: string, opaque: boolean}>}\n */\nconst LayerConfig = {\n  'terrain': {\n    extension: 'png',\n    opaque: true,\n  },\n  'terrain-background': {\n    extension: 'png',\n    opaque: true,\n  },\n  'terrain-labels': {\n    extension: 'png',\n    opaque: false,\n  },\n  'terrain-lines': {\n    extension: 'png',\n    opaque: false,\n  },\n  'toner-background': {\n    extension: 'png',\n    opaque: true,\n  },\n  'toner': {\n    extension: 'png',\n    opaque: true,\n  },\n  'toner-hybrid': {\n    extension: 'png',\n    opaque: false,\n  },\n  'toner-labels': {\n    extension: 'png',\n    opaque: false,\n  },\n  'toner-lines': {\n    extension: 'png',\n    opaque: false,\n  },\n  'toner-lite': {\n    extension: 'png',\n    opaque: true,\n  },\n  'watercolor': {\n    extension: 'jpg',\n    opaque: true,\n  },\n};\n\n/**\n * @type {Object<string, {minZoom: number, maxZoom: number}>}\n */\nconst ProviderConfig = {\n  'terrain': {\n    minZoom: 0,\n    maxZoom: 18,\n  },\n  'toner': {\n    minZoom: 0,\n    maxZoom: 20,\n  },\n  'watercolor': {\n    minZoom: 0,\n    maxZoom: 18,\n  },\n};\n\n/**\n * @typedef {Object} Options\n * @property {number} [cacheSize] Initial tile cache size. Will auto-grow to hold at least the number of tiles in the viewport.\n * @property {boolean} [interpolate=true] Use interpolated values when resampling.  By default,\n * linear interpolation is used when resampling.  Set to false to use the nearest neighbor instead.\n * @property {string} layer Layer name.\n * @property {number} [minZoom] Minimum zoom.\n * @property {number} [maxZoom] Maximum zoom.\n * @property {number} [reprojectionErrorThreshold=0.5] Maximum allowed reprojection error (in pixels).\n * Higher values can increase reprojection performance, but decrease precision.\n * @property {import(\"../Tile.js\").LoadFunction} [tileLoadFunction]\n * Optional function to load a tile given a URL. The default is\n * ```js\n * function(imageTile, src) {\n *   imageTile.getImage().src = src;\n * };\n * ```\n * @property {number} [transition=250] Duration of the opacity transition for rendering.\n * To disable the opacity transition, pass `transition: 0`.\n * @property {string} [url] URL template. Must include `{x}`, `{y}` or `{-y}`, and `{z}` placeholders.\n * @property {boolean} [wrapX=true] Whether to wrap the world horizontally.\n * @property {number|import(\"../array.js\").NearestDirectionFunction} [zDirection=0]\n * Choose whether to use tiles with a higher or lower zoom level when between integer\n * zoom levels. See {@link module:ol/tilegrid/TileGrid~TileGrid#getZForResolution}.\n */\n\n/**\n * @classdesc\n * Layer source for the Stamen tile server.\n * @api\n */\nclass Stamen extends XYZ {\n  /**\n   * @param {Options} options Stamen options.\n   */\n  constructor(options) {\n    const i = options.layer.indexOf('-');\n    const provider = i == -1 ? options.layer : options.layer.slice(0, i);\n    const providerConfig = ProviderConfig[provider];\n\n    const layerConfig = LayerConfig[options.layer];\n\n    const url =\n      options.url !== undefined\n        ? options.url\n        : 'https://stamen-tiles-{a-d}.a.ssl.fastly.net/' +\n          options.layer +\n          '/{z}/{x}/{y}.' +\n          layerConfig.extension;\n\n    super({\n      attributions: ATTRIBUTIONS,\n      cacheSize: options.cacheSize,\n      crossOrigin: 'anonymous',\n      interpolate: options.interpolate,\n      maxZoom:\n        options.maxZoom != undefined ? options.maxZoom : providerConfig.maxZoom,\n      minZoom:\n        options.minZoom != undefined ? options.minZoom : providerConfig.minZoom,\n      opaque: layerConfig.opaque,\n      reprojectionErrorThreshold: options.reprojectionErrorThreshold,\n      tileLoadFunction: options.tileLoadFunction,\n      transition: options.transition,\n      url: url,\n      wrapX: options.wrapX,\n      zDirection: options.zDirection,\n    });\n  }\n}\n\nexport default Stamen;\n","/**\n * @module ol/source/TileArcGISRest\n */\n\nimport TileImage from './TileImage.js';\nimport {appendParams} from '../uri.js';\nimport {createEmpty} from '../extent.js';\nimport {modulo} from '../math.js';\nimport {scale as scaleSize, toSize} from '../size.js';\nimport {hash as tileCoordHash} from '../tilecoord.js';\n\n/**\n * @typedef {Object} Options\n * @property {import(\"./Source.js\").AttributionLike} [attributions] Attributions.\n * @property {number} [cacheSize] Initial tile cache size. Will auto-grow to hold at least the number of tiles in the viewport.\n * @property {null|string} [crossOrigin] The `crossOrigin` attribute for loaded images.  Note that\n * you must provide a `crossOrigin` value if you want to access pixel data with the Canvas renderer.\n * See https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image for more detail.\n * @property {boolean} [interpolate=true] Use interpolated values when resampling.  By default,\n * linear interpolation is used when resampling.  Set to false to use the nearest neighbor instead.\n * @property {Object<string,*>} [params] ArcGIS Rest parameters. This field is optional. Service defaults will be\n * used for any fields not specified. `FORMAT` is `PNG32` by default. `F` is `IMAGE` by\n * default. `TRANSPARENT` is `true` by default.  `BBOX`, `SIZE`, `BBOXSR`,\n * and `IMAGESR` will be set dynamically. Set `LAYERS` to\n * override the default service layer visibility. See\n * https://developers.arcgis.com/rest/services-reference/export-map.htm\n * for further reference.\n * @property {boolean} [hidpi=true] Use the `ol/Map#pixelRatio` value when requesting\n * the image from the remote server.\n * @property {import(\"../tilegrid/TileGrid.js\").default} [tileGrid] Tile grid. Base this on the resolutions,\n * tilesize and extent supported by the server.\n * If this is not defined, a default grid will be used: if there is a projection\n * extent, the grid will be based on that; if not, a grid based on a global\n * extent with origin at 0,0 will be used.\n * @property {import(\"../proj.js\").ProjectionLike} [projection] Projection. Default is the view projection.\n * The projection code must contain a numeric end portion separated by :\n * or the entire code must form a valid ArcGIS SpatialReference definition.\n * @property {number} [reprojectionErrorThreshold=0.5] Maximum allowed reprojection error (in pixels).\n * Higher values can increase reprojection performance, but decrease precision.\n * @property {import(\"../Tile.js\").LoadFunction} [tileLoadFunction] Optional function to load a tile given a URL.\n * The default is\n * ```js\n * function(imageTile, src) {\n *   imageTile.getImage().src = src;\n * };\n * ```\n * @property {string} [url] ArcGIS Rest service URL for a Map Service or Image Service. The\n * url should include /MapServer or /ImageServer.\n * @property {boolean} [wrapX=true] Whether to wrap the world horizontally.\n * @property {number} [transition] Duration of the opacity transition for rendering.  To disable the opacity\n * transition, pass `transition: 0`.\n * @property {Array<string>} [urls] ArcGIS Rest service urls. Use this instead of `url` when the ArcGIS\n * Service supports multiple urls for export requests.\n * @property {number|import(\"../array.js\").NearestDirectionFunction} [zDirection=0]\n * Choose whether to use tiles with a higher or lower zoom level when between integer\n * zoom levels. See {@link module:ol/tilegrid/TileGrid~TileGrid#getZForResolution}.\n */\n\n/**\n * @classdesc\n * Layer source for tile data from ArcGIS Rest services. Map and Image\n * Services are supported.\n *\n * For cached ArcGIS services, better performance is available using the\n * {@link module:ol/source/XYZ~XYZ} data source.\n * @api\n */\nclass TileArcGISRest extends TileImage {\n  /**\n   * @param {Options} [options] Tile ArcGIS Rest options.\n   */\n  constructor(options) {\n    options = options ? options : {};\n\n    super({\n      attributions: options.attributions,\n      cacheSize: options.cacheSize,\n      crossOrigin: options.crossOrigin,\n      interpolate: options.interpolate,\n      projection: options.projection,\n      reprojectionErrorThreshold: options.reprojectionErrorThreshold,\n      tileGrid: options.tileGrid,\n      tileLoadFunction: options.tileLoadFunction,\n      url: options.url,\n      urls: options.urls,\n      wrapX: options.wrapX !== undefined ? options.wrapX : true,\n      transition: options.transition,\n      zDirection: options.zDirection,\n    });\n\n    /**\n     * @private\n     * @type {!Object}\n     */\n    this.params_ = options.params || {};\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.hidpi_ = options.hidpi !== undefined ? options.hidpi : true;\n\n    /**\n     * @private\n     * @type {import(\"../extent.js\").Extent}\n     */\n    this.tmpExtent_ = createEmpty();\n\n    this.setKey(this.getKeyForParams_());\n  }\n\n  /**\n   * @private\n   * @return {string} The key for the current params.\n   */\n  getKeyForParams_() {\n    let i = 0;\n    const res = [];\n    for (const key in this.params_) {\n      res[i++] = key + '-' + this.params_[key];\n    }\n    return res.join('/');\n  }\n\n  /**\n   * Get the user-provided params, i.e. those passed to the constructor through\n   * the \"params\" option, and possibly updated using the updateParams method.\n   * @return {Object} Params.\n   * @api\n   */\n  getParams() {\n    return this.params_;\n  }\n\n  /**\n   * @param {import(\"../tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n   * @param {import(\"../size.js\").Size} tileSize Tile size.\n   * @param {import(\"../extent.js\").Extent} tileExtent Tile extent.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   * @param {Object} params Params.\n   * @return {string|undefined} Request URL.\n   * @private\n   */\n  getRequestUrl_(\n    tileCoord,\n    tileSize,\n    tileExtent,\n    pixelRatio,\n    projection,\n    params\n  ) {\n    const urls = this.urls;\n    if (!urls) {\n      return undefined;\n    }\n\n    // ArcGIS Server only wants the numeric portion of the projection ID.\n    // (if there is no numeric portion the entire projection code must\n    // form a valid ArcGIS SpatialReference definition).\n    const srid = projection\n      .getCode()\n      .split(/:(?=\\d+$)/)\n      .pop();\n\n    params['SIZE'] = tileSize[0] + ',' + tileSize[1];\n    params['BBOX'] = tileExtent.join(',');\n    params['BBOXSR'] = srid;\n    params['IMAGESR'] = srid;\n    params['DPI'] = Math.round(\n      params['DPI'] ? params['DPI'] * pixelRatio : 90 * pixelRatio\n    );\n\n    let url;\n    if (urls.length == 1) {\n      url = urls[0];\n    } else {\n      const index = modulo(tileCoordHash(tileCoord), urls.length);\n      url = urls[index];\n    }\n\n    const modifiedUrl = url\n      .replace(/MapServer\\/?$/, 'MapServer/export')\n      .replace(/ImageServer\\/?$/, 'ImageServer/exportImage');\n    return appendParams(modifiedUrl, params);\n  }\n\n  /**\n   * Get the tile pixel ratio for this source.\n   * @param {number} pixelRatio Pixel ratio.\n   * @return {number} Tile pixel ratio.\n   */\n  getTilePixelRatio(pixelRatio) {\n    return this.hidpi_ ? pixelRatio : 1;\n  }\n\n  /**\n   * Update the user-provided params.\n   * @param {Object} params Params.\n   * @api\n   */\n  updateParams(params) {\n    Object.assign(this.params_, params);\n    this.setKey(this.getKeyForParams_());\n  }\n\n  /**\n   * @param {import(\"../tilecoord.js\").TileCoord} tileCoord The tile coordinate\n   * @param {number} pixelRatio The pixel ratio\n   * @param {import(\"../proj/Projection.js\").default} projection The projection\n   * @return {string|undefined} The tile URL\n   * @override\n   */\n  tileUrlFunction(tileCoord, pixelRatio, projection) {\n    let tileGrid = this.getTileGrid();\n    if (!tileGrid) {\n      tileGrid = this.getTileGridForProjection(projection);\n    }\n\n    if (tileGrid.getResolutions().length <= tileCoord[0]) {\n      return undefined;\n    }\n\n    if (pixelRatio != 1 && !this.hidpi_) {\n      pixelRatio = 1;\n    }\n\n    const tileExtent = tileGrid.getTileCoordExtent(tileCoord, this.tmpExtent_);\n    let tileSize = toSize(tileGrid.getTileSize(tileCoord[0]), this.tmpSize);\n\n    if (pixelRatio != 1) {\n      tileSize = scaleSize(tileSize, pixelRatio, this.tmpSize);\n    }\n\n    // Apply default params and override with user specified values.\n    const baseParams = {\n      'F': 'image',\n      'FORMAT': 'PNG32',\n      'TRANSPARENT': true,\n    };\n    Object.assign(baseParams, this.params_);\n\n    return this.getRequestUrl_(\n      tileCoord,\n      tileSize,\n      tileExtent,\n      pixelRatio,\n      projection,\n      baseParams\n    );\n  }\n}\n\nexport default TileArcGISRest;\n","/**\n * @module ol/source/TileDebug\n */\n\nimport XYZ from './XYZ.js';\nimport {createCanvasContext2D} from '../dom.js';\nimport {toSize} from '../size.js';\n\n/**\n * @typedef {Object} Options\n * @property {import(\"../proj.js\").ProjectionLike} [projection='EPSG:3857'] Optional projection.\n * @property {import(\"../tilegrid/TileGrid.js\").default} [tileGrid] Tile grid.\n * @property {boolean} [wrapX=true] Whether to wrap the world horizontally.\n * @property {number|import(\"../array.js\").NearestDirectionFunction} [zDirection=0]\n * Set to `1` when debugging `VectorTile` sources with a default configuration.\n * Choose whether to use tiles with a higher or lower zoom level when between integer\n * zoom levels. See {@link module:ol/tilegrid/TileGrid~TileGrid#getZForResolution}.\n * @property {string} [template='z:{z} x:{x} y:{y}'] Template for labeling the tiles.\n * Should include `{x}`, `{y}` or `{-y}`, and `{z}` placeholders.\n */\n\n/**\n * @classdesc\n * A pseudo tile source, which does not fetch tiles from a server, but renders\n * a grid outline for the tile grid/projection along with the coordinates for\n * each tile. See examples/canvas-tiles for an example.\n * @api\n */\nclass TileDebug extends XYZ {\n  /**\n   * @param {Options} [options] Debug tile options.\n   */\n  constructor(options) {\n    /**\n     * @type {Options}\n     */\n    options = options || {};\n\n    super({\n      opaque: false,\n      projection: options.projection,\n      tileGrid: options.tileGrid,\n      wrapX: options.wrapX !== undefined ? options.wrapX : true,\n      zDirection: options.zDirection,\n      url: options.template || 'z:{z} x:{x} y:{y}',\n      tileLoadFunction: (tile, text) => {\n        const z = tile.getTileCoord()[0];\n        const tileSize = toSize(this.tileGrid.getTileSize(z));\n        const context = createCanvasContext2D(tileSize[0], tileSize[1]);\n\n        context.strokeStyle = 'grey';\n        context.strokeRect(0.5, 0.5, tileSize[0] + 0.5, tileSize[1] + 0.5);\n\n        context.fillStyle = 'grey';\n        context.strokeStyle = 'white';\n        context.textAlign = 'center';\n        context.textBaseline = 'middle';\n        context.font = '24px sans-serif';\n        context.lineWidth = 4;\n        context.strokeText(text, tileSize[0] / 2, tileSize[1] / 2, tileSize[0]);\n        context.fillText(text, tileSize[0] / 2, tileSize[1] / 2, tileSize[0]);\n\n        /** @type {import(\"../ImageTile.js\").default} */ (tile).setImage(\n          context.canvas\n        );\n      },\n    });\n  }\n}\n\nexport default TileDebug;\n","/**\n * @module ol/source/TileJSON\n */\n// FIXME check order of async callbacks\n\n/**\n * See https://mapbox.com/developers/api/.\n */\n\nimport TileImage from './TileImage.js';\nimport {applyTransform, intersects} from '../extent.js';\nimport {assert} from '../asserts.js';\nimport {createFromTemplates} from '../tileurlfunction.js';\nimport {createXYZ, extentFromProjection} from '../tilegrid.js';\nimport {get as getProjection, getTransformFromProjections} from '../proj.js';\nimport {jsonp as requestJSONP} from '../net.js';\n\n/**\n * @typedef {Object} Config\n * @property {string} [name] The name.\n * @property {string} [description] The description.\n * @property {string} [version] The version.\n * @property {string} [attribution] The attribution.\n * @property {string} [template] The template.\n * @property {string} [legend] The legend.\n * @property {string} [scheme] The scheme.\n * @property {Array<string>} tiles The tile URL templates.\n * @property {Array<string>} [grids] Optional grids.\n * @property {number} [minzoom] Minimum zoom level.\n * @property {number} [maxzoom] Maximum zoom level.\n * @property {Array<number>} [bounds] Optional bounds.\n * @property {Array<number>} [center] Optional center.\n */\n\n/**\n * @typedef {Object} Options\n * @property {import(\"./Source.js\").AttributionLike} [attributions] Attributions.\n * @property {number} [cacheSize] Initial tile cache size. Will auto-grow to hold at least the number of tiles in the viewport.\n * @property {null|string} [crossOrigin] The `crossOrigin` attribute for loaded images.  Note that\n * you must provide a `crossOrigin` value if you want to access pixel data with the Canvas renderer.\n * See https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image for more detail.\n * @property {boolean} [interpolate=true] Use interpolated values when resampling.  By default,\n * linear interpolation is used when resampling.  Set to false to use the nearest neighbor instead.\n * @property {boolean} [jsonp=false] Use JSONP with callback to load the TileJSON.\n * Useful when the server does not support CORS..\n * @property {number} [reprojectionErrorThreshold=0.5] Maximum allowed reprojection error (in pixels).\n * Higher values can increase reprojection performance, but decrease precision.\n * @property {Config} [tileJSON] TileJSON configuration for this source.\n * If not provided, `url` must be configured.\n * @property {import(\"../Tile.js\").LoadFunction} [tileLoadFunction] Optional function to load a tile given a URL. The default is\n * ```js\n * function(imageTile, src) {\n *   imageTile.getImage().src = src;\n * };\n * ```\n * @property {number|import(\"../size.js\").Size} [tileSize=[256, 256]] The tile size used by the tile service.\n * Note: `tileSize` and other non-standard TileJSON properties are currently ignored.\n * @property {string} [url] URL to the TileJSON file. If not provided, `tileJSON` must be configured.\n * @property {boolean} [wrapX=true] Whether to wrap the world horizontally.\n * @property {number} [transition] Duration of the opacity transition for rendering.\n * To disable the opacity transition, pass `transition: 0`.\n * @property {number|import(\"../array.js\").NearestDirectionFunction} [zDirection=0]\n * Choose whether to use tiles with a higher or lower zoom level when between integer\n * zoom levels. See {@link module:ol/tilegrid/TileGrid~TileGrid#getZForResolution}.\n */\n\n/**\n * @classdesc\n * Layer source for tile data in TileJSON format.\n * @api\n */\nclass TileJSON extends TileImage {\n  /**\n   * @param {Options} options TileJSON options.\n   */\n  constructor(options) {\n    super({\n      attributions: options.attributions,\n      cacheSize: options.cacheSize,\n      crossOrigin: options.crossOrigin,\n      interpolate: options.interpolate,\n      projection: getProjection('EPSG:3857'),\n      reprojectionErrorThreshold: options.reprojectionErrorThreshold,\n      state: 'loading',\n      tileLoadFunction: options.tileLoadFunction,\n      wrapX: options.wrapX !== undefined ? options.wrapX : true,\n      transition: options.transition,\n      zDirection: options.zDirection,\n    });\n\n    /**\n     * @type {Config}\n     * @private\n     */\n    this.tileJSON_ = null;\n\n    /**\n     * @type {number|import(\"../size.js\").Size}\n     * @private\n     */\n    this.tileSize_ = options.tileSize;\n\n    if (options.url) {\n      if (options.jsonp) {\n        requestJSONP(\n          options.url,\n          this.handleTileJSONResponse.bind(this),\n          this.handleTileJSONError.bind(this)\n        );\n      } else {\n        const client = new XMLHttpRequest();\n        client.addEventListener('load', this.onXHRLoad_.bind(this));\n        client.addEventListener('error', this.onXHRError_.bind(this));\n        client.open('GET', options.url);\n        client.send();\n      }\n    } else if (options.tileJSON) {\n      this.handleTileJSONResponse(options.tileJSON);\n    } else {\n      assert(false, 51); // Either `url` or `tileJSON` options must be provided\n    }\n  }\n\n  /**\n   * @private\n   * @param {Event} event The load event.\n   */\n  onXHRLoad_(event) {\n    const client = /** @type {XMLHttpRequest} */ (event.target);\n    // status will be 0 for file:// urls\n    if (!client.status || (client.status >= 200 && client.status < 300)) {\n      let response;\n      try {\n        response = /** @type {Config} */ (JSON.parse(client.responseText));\n      } catch (err) {\n        this.handleTileJSONError();\n        return;\n      }\n      this.handleTileJSONResponse(response);\n    } else {\n      this.handleTileJSONError();\n    }\n  }\n\n  /**\n   * @private\n   * @param {Event} event The error event.\n   */\n  onXHRError_(event) {\n    this.handleTileJSONError();\n  }\n\n  /**\n   * @return {Config} The tilejson object.\n   * @api\n   */\n  getTileJSON() {\n    return this.tileJSON_;\n  }\n\n  /**\n   * @protected\n   * @param {Config} tileJSON Tile JSON.\n   */\n  handleTileJSONResponse(tileJSON) {\n    const epsg4326Projection = getProjection('EPSG:4326');\n\n    const sourceProjection = this.getProjection();\n    let extent;\n    if (tileJSON['bounds'] !== undefined) {\n      const transform = getTransformFromProjections(\n        epsg4326Projection,\n        sourceProjection\n      );\n      extent = applyTransform(tileJSON['bounds'], transform);\n    }\n\n    const gridExtent = extentFromProjection(sourceProjection);\n    const minZoom = tileJSON['minzoom'] || 0;\n    const maxZoom = tileJSON['maxzoom'] || 22;\n    const tileGrid = createXYZ({\n      extent: gridExtent,\n      maxZoom: maxZoom,\n      minZoom: minZoom,\n      tileSize: this.tileSize_,\n    });\n    this.tileGrid = tileGrid;\n\n    this.tileUrlFunction = createFromTemplates(tileJSON['tiles'], tileGrid);\n\n    if (tileJSON['attribution'] && !this.getAttributions()) {\n      const attributionExtent = extent !== undefined ? extent : gridExtent;\n      this.setAttributions(function (frameState) {\n        if (intersects(attributionExtent, frameState.extent)) {\n          return [tileJSON['attribution']];\n        }\n        return null;\n      });\n    }\n    this.tileJSON_ = tileJSON;\n    this.setState('ready');\n  }\n\n  /**\n   * @protected\n   */\n  handleTileJSONError() {\n    this.setState('error');\n  }\n}\n\nexport default TileJSON;\n","/**\n * @module ol/source/TileWMS\n */\n\nimport TileImage from './TileImage.js';\nimport {DEFAULT_VERSION} from './wms.js';\nimport {appendParams} from '../uri.js';\nimport {assert} from '../asserts.js';\nimport {buffer, createEmpty} from '../extent.js';\nimport {buffer as bufferSize, scale as scaleSize, toSize} from '../size.js';\nimport {calculateSourceResolution} from '../reproj.js';\nimport {compareVersions} from '../string.js';\nimport {get as getProjection, transform, transformExtent} from '../proj.js';\nimport {modulo} from '../math.js';\nimport {hash as tileCoordHash} from '../tilecoord.js';\n\n/**\n * @typedef {Object} Options\n * @property {import(\"./Source.js\").AttributionLike} [attributions] Attributions.\n * @property {boolean} [attributionsCollapsible=true] Attributions are collapsible.\n * @property {number} [cacheSize] Initial tile cache size. Will auto-grow to hold at least the number of tiles in the viewport.\n * @property {null|string} [crossOrigin] The `crossOrigin` attribute for loaded images.  Note that\n * you must provide a `crossOrigin` value if you want to access pixel data with the Canvas renderer.\n * See https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image for more detail.\n * @property {boolean} [interpolate=true] Use interpolated values when resampling.  By default,\n * linear interpolation is used when resampling.  Set to false to use the nearest neighbor instead.\n * @property {Object<string,*>} params WMS request parameters.\n * At least a `LAYERS` param is required. `STYLES` is\n * `''` by default. `VERSION` is `1.3.0` by default. `WIDTH`, `HEIGHT`, `BBOX`\n * and `CRS` (`SRS` for WMS version < 1.3.0) will be set dynamically.\n * @property {number} [gutter=0]\n * The size in pixels of the gutter around image tiles to ignore. By setting\n * this property to a non-zero value, images will be requested that are wider\n * and taller than the tile size by a value of `2 x gutter`.\n * Using a non-zero value allows artifacts of rendering at tile edges to be\n * ignored. If you control the WMS service it is recommended to address\n * \"artifacts at tile edges\" issues by properly configuring the WMS service. For\n * example, MapServer has a `tile_map_edge_buffer` configuration parameter for\n * this. See https://mapserver.org/output/tile_mode.html.\n * @property {boolean} [hidpi=true] Use the `ol/Map#pixelRatio` value when requesting\n * the image from the remote server.\n * @property {import(\"../proj.js\").ProjectionLike} [projection] Projection. Default is the view projection.\n * @property {number} [reprojectionErrorThreshold=0.5] Maximum allowed reprojection error (in pixels).\n * Higher values can increase reprojection performance, but decrease precision.\n * @property {typeof import(\"../ImageTile.js\").default} [tileClass] Class used to instantiate image tiles.\n * Default is {@link module:ol/ImageTile~ImageTile}.\n * @property {import(\"../tilegrid/TileGrid.js\").default} [tileGrid] Tile grid. Base this on the resolutions,\n * tilesize and extent supported by the server.\n * If this is not defined, a default grid will be used: if there is a projection\n * extent, the grid will be based on that; if not, a grid based on a global\n * extent with origin at 0,0 will be used.\n * @property {import(\"./wms.js\").ServerType} [serverType] The type of\n * the remote WMS server: `mapserver`, `geoserver`, `carmentaserver`, or `qgis`.\n * Only needed if `hidpi` is `true`.\n * @property {import(\"../Tile.js\").LoadFunction} [tileLoadFunction] Optional function to load a tile given a URL. The default is\n * ```js\n * function(imageTile, src) {\n *   imageTile.getImage().src = src;\n * };\n * ```\n * @property {string} [url] WMS service URL.\n * @property {Array<string>} [urls] WMS service urls.\n * Use this instead of `url` when the WMS supports multiple urls for GetMap requests.\n * @property {boolean} [wrapX=true] Whether to wrap the world horizontally.\n * When set to `false`, only one world\n * will be rendered. When `true`, tiles will be requested for one world only,\n * but they will be wrapped horizontally to render multiple worlds.\n * @property {number} [transition] Duration of the opacity transition for rendering.\n * To disable the opacity transition, pass `transition: 0`.\n * @property {number|import(\"../array.js\").NearestDirectionFunction} [zDirection=0]\n * Choose whether to use tiles with a higher or lower zoom level when between integer\n * zoom levels. See {@link module:ol/tilegrid/TileGrid~TileGrid#getZForResolution}.\n */\n\n/**\n * @classdesc\n * Layer source for tile data from WMS servers.\n * @api\n */\nclass TileWMS extends TileImage {\n  /**\n   * @param {Options} [options] Tile WMS options.\n   */\n  constructor(options) {\n    options = options ? options : /** @type {Options} */ ({});\n\n    const params = Object.assign({}, options.params);\n\n    const transparent = 'TRANSPARENT' in params ? params['TRANSPARENT'] : true;\n\n    super({\n      attributions: options.attributions,\n      attributionsCollapsible: options.attributionsCollapsible,\n      cacheSize: options.cacheSize,\n      crossOrigin: options.crossOrigin,\n      interpolate: options.interpolate,\n      opaque: !transparent,\n      projection: options.projection,\n      reprojectionErrorThreshold: options.reprojectionErrorThreshold,\n      tileClass: options.tileClass,\n      tileGrid: options.tileGrid,\n      tileLoadFunction: options.tileLoadFunction,\n      url: options.url,\n      urls: options.urls,\n      wrapX: options.wrapX !== undefined ? options.wrapX : true,\n      transition: options.transition,\n      zDirection: options.zDirection,\n    });\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.gutter_ = options.gutter !== undefined ? options.gutter : 0;\n\n    /**\n     * @private\n     * @type {!Object}\n     */\n    this.params_ = params;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.v13_ = true;\n\n    /**\n     * @private\n     * @type {import(\"./wms.js\").ServerType}\n     */\n    this.serverType_ = options.serverType;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.hidpi_ = options.hidpi !== undefined ? options.hidpi : true;\n\n    /**\n     * @private\n     * @type {import(\"../extent.js\").Extent}\n     */\n    this.tmpExtent_ = createEmpty();\n\n    this.updateV13_();\n    this.setKey(this.getKeyForParams_());\n  }\n\n  /**\n   * Return the GetFeatureInfo URL for the passed coordinate, resolution, and\n   * projection. Return `undefined` if the GetFeatureInfo URL cannot be\n   * constructed.\n   * @param {import(\"../coordinate.js\").Coordinate} coordinate Coordinate.\n   * @param {number} resolution Resolution.\n   * @param {import(\"../proj.js\").ProjectionLike} projection Projection.\n   * @param {!Object} params GetFeatureInfo params. `INFO_FORMAT` at least should\n   *     be provided. If `QUERY_LAYERS` is not provided then the layers specified\n   *     in the `LAYERS` parameter will be used. `VERSION` should not be\n   *     specified here.\n   * @return {string|undefined} GetFeatureInfo URL.\n   * @api\n   */\n  getFeatureInfoUrl(coordinate, resolution, projection, params) {\n    const projectionObj = getProjection(projection);\n    const sourceProjectionObj = this.getProjection();\n\n    let tileGrid = this.getTileGrid();\n    if (!tileGrid) {\n      tileGrid = this.getTileGridForProjection(projectionObj);\n    }\n\n    const z = tileGrid.getZForResolution(resolution, this.zDirection);\n    const tileCoord = tileGrid.getTileCoordForCoordAndZ(coordinate, z);\n\n    if (tileGrid.getResolutions().length <= tileCoord[0]) {\n      return undefined;\n    }\n\n    let tileResolution = tileGrid.getResolution(tileCoord[0]);\n    let tileExtent = tileGrid.getTileCoordExtent(tileCoord, this.tmpExtent_);\n    let tileSize = toSize(tileGrid.getTileSize(tileCoord[0]), this.tmpSize);\n\n    const gutter = this.gutter_;\n    if (gutter !== 0) {\n      tileSize = bufferSize(tileSize, gutter, this.tmpSize);\n      tileExtent = buffer(tileExtent, tileResolution * gutter, tileExtent);\n    }\n\n    if (sourceProjectionObj && sourceProjectionObj !== projectionObj) {\n      tileResolution = calculateSourceResolution(\n        sourceProjectionObj,\n        projectionObj,\n        coordinate,\n        tileResolution\n      );\n      tileExtent = transformExtent(\n        tileExtent,\n        projectionObj,\n        sourceProjectionObj\n      );\n      coordinate = transform(coordinate, projectionObj, sourceProjectionObj);\n    }\n\n    const baseParams = {\n      'SERVICE': 'WMS',\n      'VERSION': DEFAULT_VERSION,\n      'REQUEST': 'GetFeatureInfo',\n      'FORMAT': 'image/png',\n      'TRANSPARENT': true,\n      'QUERY_LAYERS': this.params_['LAYERS'],\n    };\n    Object.assign(baseParams, this.params_, params);\n\n    const x = Math.floor((coordinate[0] - tileExtent[0]) / tileResolution);\n    const y = Math.floor((tileExtent[3] - coordinate[1]) / tileResolution);\n\n    baseParams[this.v13_ ? 'I' : 'X'] = x;\n    baseParams[this.v13_ ? 'J' : 'Y'] = y;\n\n    return this.getRequestUrl_(\n      tileCoord,\n      tileSize,\n      tileExtent,\n      1,\n      sourceProjectionObj || projectionObj,\n      baseParams\n    );\n  }\n\n  /**\n   * Return the GetLegendGraphic URL, optionally optimized for the passed\n   * resolution and possibly including any passed specific parameters. Returns\n   * `undefined` if the GetLegendGraphic URL cannot be constructed.\n   *\n   * @param {number} [resolution] Resolution. If set to undefined, `SCALE`\n   *     will not be calculated and included in URL.\n   * @param {Object} [params] GetLegendGraphic params. If `LAYER` is set, the\n   *     request is generated for this wms layer, else it will try to use the\n   *     configured wms layer. Default `FORMAT` is `image/png`.\n   *     `VERSION` should not be specified here.\n   * @return {string|undefined} GetLegendGraphic URL.\n   * @api\n   */\n  getLegendUrl(resolution, params) {\n    if (this.urls[0] === undefined) {\n      return undefined;\n    }\n\n    const baseParams = {\n      'SERVICE': 'WMS',\n      'VERSION': DEFAULT_VERSION,\n      'REQUEST': 'GetLegendGraphic',\n      'FORMAT': 'image/png',\n    };\n\n    if (params === undefined || params['LAYER'] === undefined) {\n      const layers = this.params_.LAYERS;\n      const isSingleLayer = !Array.isArray(layers) || layers.length === 1;\n      if (!isSingleLayer) {\n        return undefined;\n      }\n      baseParams['LAYER'] = layers;\n    }\n\n    if (resolution !== undefined) {\n      const mpu = this.getProjection()\n        ? this.getProjection().getMetersPerUnit()\n        : 1;\n      const pixelSize = 0.00028;\n      baseParams['SCALE'] = (resolution * mpu) / pixelSize;\n    }\n\n    Object.assign(baseParams, params);\n\n    return appendParams(/** @type {string} */ (this.urls[0]), baseParams);\n  }\n\n  /**\n   * @return {number} Gutter.\n   */\n  getGutter() {\n    return this.gutter_;\n  }\n\n  /**\n   * Get the user-provided params, i.e. those passed to the constructor through\n   * the \"params\" option, and possibly updated using the updateParams method.\n   * @return {Object} Params.\n   * @api\n   */\n  getParams() {\n    return this.params_;\n  }\n\n  /**\n   * @param {import(\"../tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n   * @param {import(\"../size.js\").Size} tileSize Tile size.\n   * @param {import(\"../extent.js\").Extent} tileExtent Tile extent.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   * @param {Object} params Params.\n   * @return {string|undefined} Request URL.\n   * @private\n   */\n  getRequestUrl_(\n    tileCoord,\n    tileSize,\n    tileExtent,\n    pixelRatio,\n    projection,\n    params\n  ) {\n    const urls = this.urls;\n    if (!urls) {\n      return undefined;\n    }\n\n    params['WIDTH'] = tileSize[0];\n    params['HEIGHT'] = tileSize[1];\n\n    params[this.v13_ ? 'CRS' : 'SRS'] = projection.getCode();\n\n    if (!('STYLES' in this.params_)) {\n      params['STYLES'] = '';\n    }\n\n    if (pixelRatio != 1) {\n      switch (this.serverType_) {\n        case 'geoserver':\n          const dpi = (90 * pixelRatio + 0.5) | 0;\n          if ('FORMAT_OPTIONS' in params) {\n            params['FORMAT_OPTIONS'] += ';dpi:' + dpi;\n          } else {\n            params['FORMAT_OPTIONS'] = 'dpi:' + dpi;\n          }\n          break;\n        case 'mapserver':\n          params['MAP_RESOLUTION'] = 90 * pixelRatio;\n          break;\n        case 'carmentaserver':\n        case 'qgis':\n          params['DPI'] = 90 * pixelRatio;\n          break;\n        default: // Unknown `serverType` configured\n          assert(false, 52);\n          break;\n      }\n    }\n\n    const axisOrientation = projection.getAxisOrientation();\n    const bbox = tileExtent;\n    if (this.v13_ && axisOrientation.substr(0, 2) == 'ne') {\n      let tmp;\n      tmp = tileExtent[0];\n      bbox[0] = tileExtent[1];\n      bbox[1] = tmp;\n      tmp = tileExtent[2];\n      bbox[2] = tileExtent[3];\n      bbox[3] = tmp;\n    }\n    params['BBOX'] = bbox.join(',');\n\n    let url;\n    if (urls.length == 1) {\n      url = urls[0];\n    } else {\n      const index = modulo(tileCoordHash(tileCoord), urls.length);\n      url = urls[index];\n    }\n    return appendParams(url, params);\n  }\n\n  /**\n   * Get the tile pixel ratio for this source.\n   * @param {number} pixelRatio Pixel ratio.\n   * @return {number} Tile pixel ratio.\n   */\n  getTilePixelRatio(pixelRatio) {\n    return !this.hidpi_ || this.serverType_ === undefined ? 1 : pixelRatio;\n  }\n\n  /**\n   * @private\n   * @return {string} The key for the current params.\n   */\n  getKeyForParams_() {\n    let i = 0;\n    const res = [];\n    for (const key in this.params_) {\n      res[i++] = key + '-' + this.params_[key];\n    }\n    return res.join('/');\n  }\n\n  /**\n   * Update the user-provided params.\n   * @param {Object} params Params.\n   * @api\n   */\n  updateParams(params) {\n    Object.assign(this.params_, params);\n    this.updateV13_();\n    this.setKey(this.getKeyForParams_());\n  }\n\n  /**\n   * @private\n   */\n  updateV13_() {\n    const version = this.params_['VERSION'] || DEFAULT_VERSION;\n    this.v13_ = compareVersions(version, '1.3') >= 0;\n  }\n\n  /**\n   * @param {import(\"../tilecoord.js\").TileCoord} tileCoord The tile coordinate\n   * @param {number} pixelRatio The pixel ratio\n   * @param {import(\"../proj/Projection.js\").default} projection The projection\n   * @return {string|undefined} The tile URL\n   * @override\n   */\n  tileUrlFunction(tileCoord, pixelRatio, projection) {\n    let tileGrid = this.getTileGrid();\n    if (!tileGrid) {\n      tileGrid = this.getTileGridForProjection(projection);\n    }\n\n    if (tileGrid.getResolutions().length <= tileCoord[0]) {\n      return undefined;\n    }\n\n    if (pixelRatio != 1 && (!this.hidpi_ || this.serverType_ === undefined)) {\n      pixelRatio = 1;\n    }\n\n    const tileResolution = tileGrid.getResolution(tileCoord[0]);\n    let tileExtent = tileGrid.getTileCoordExtent(tileCoord, this.tmpExtent_);\n    let tileSize = toSize(tileGrid.getTileSize(tileCoord[0]), this.tmpSize);\n\n    const gutter = this.gutter_;\n    if (gutter !== 0) {\n      tileSize = bufferSize(tileSize, gutter, this.tmpSize);\n      tileExtent = buffer(tileExtent, tileResolution * gutter, tileExtent);\n    }\n\n    if (pixelRatio != 1) {\n      tileSize = scaleSize(tileSize, pixelRatio, this.tmpSize);\n    }\n\n    const baseParams = {\n      'SERVICE': 'WMS',\n      'VERSION': DEFAULT_VERSION,\n      'REQUEST': 'GetMap',\n      'FORMAT': 'image/png',\n      'TRANSPARENT': true,\n    };\n    Object.assign(baseParams, this.params_);\n\n    return this.getRequestUrl_(\n      tileCoord,\n      tileSize,\n      tileExtent,\n      pixelRatio,\n      projection,\n      baseParams\n    );\n  }\n}\n\nexport default TileWMS;\n","/**\n * @module ol/source/UTFGrid\n */\n\nimport EventType from '../events/EventType.js';\nimport Tile from '../Tile.js';\nimport TileSource from './Tile.js';\nimport TileState from '../TileState.js';\nimport {applyTransform, intersects} from '../extent.js';\nimport {assert} from '../asserts.js';\nimport {createFromTemplates, nullTileUrlFunction} from '../tileurlfunction.js';\nimport {createXYZ, extentFromProjection} from '../tilegrid.js';\nimport {getKeyZXY} from '../tilecoord.js';\nimport {get as getProjection, getTransformFromProjections} from '../proj.js';\nimport {listenOnce} from '../events.js';\nimport {jsonp as requestJSONP} from '../net.js';\n\n/**\n * @typedef {Object} UTFGridJSON\n * @property {Array<string>} grid The grid.\n * @property {Array<string>} keys The keys.\n * @property {Object<string, Object>} [data] Optional data.\n */\n\nexport class CustomTile extends Tile {\n  /**\n   * @param {import(\"../tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n   * @param {import(\"../TileState.js\").default} state State.\n   * @param {string} src Image source URI.\n   * @param {import(\"../extent.js\").Extent} extent Extent of the tile.\n   * @param {boolean} preemptive Load the tile when visible (before it's needed).\n   * @param {boolean} jsonp Load the tile as a script.\n   */\n  constructor(tileCoord, state, src, extent, preemptive, jsonp) {\n    super(tileCoord, state);\n\n    /**\n     * @private\n     * @type {string}\n     */\n    this.src_ = src;\n\n    /**\n     * @private\n     * @type {import(\"../extent.js\").Extent}\n     */\n    this.extent_ = extent;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.preemptive_ = preemptive;\n\n    /**\n     * @private\n     * @type {Array<string>}\n     */\n    this.grid_ = null;\n\n    /**\n     * @private\n     * @type {Array<string>}\n     */\n    this.keys_ = null;\n\n    /**\n     * @private\n     * @type {Object<string, Object>|undefined}\n     */\n    this.data_ = null;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.jsonp_ = jsonp;\n  }\n\n  /**\n   * Get the image element for this tile.\n   * @return {HTMLImageElement} Image.\n   */\n  getImage() {\n    return null;\n  }\n\n  /**\n   * Synchronously returns data at given coordinate (if available).\n   * @param {import(\"../coordinate.js\").Coordinate} coordinate Coordinate.\n   * @return {*} The data.\n   */\n  getData(coordinate) {\n    if (!this.grid_ || !this.keys_) {\n      return null;\n    }\n    const xRelative =\n      (coordinate[0] - this.extent_[0]) / (this.extent_[2] - this.extent_[0]);\n    const yRelative =\n      (coordinate[1] - this.extent_[1]) / (this.extent_[3] - this.extent_[1]);\n\n    const row = this.grid_[Math.floor((1 - yRelative) * this.grid_.length)];\n\n    if (typeof row !== 'string') {\n      return null;\n    }\n\n    let code = row.charCodeAt(Math.floor(xRelative * row.length));\n    if (code >= 93) {\n      code--;\n    }\n    if (code >= 35) {\n      code--;\n    }\n    code -= 32;\n\n    let data = null;\n    if (code in this.keys_) {\n      const id = this.keys_[code];\n      if (this.data_ && id in this.data_) {\n        data = this.data_[id];\n      } else {\n        data = id;\n      }\n    }\n    return data;\n  }\n\n  /**\n   * Calls the callback (synchronously by default) with the available data\n   * for given coordinate (or `null` if not yet loaded).\n   * @param {import(\"../coordinate.js\").Coordinate} coordinate Coordinate.\n   * @param {function(*): void} callback Callback.\n   * @param {boolean} [request] If `true` the callback is always async.\n   *                               The tile data is requested if not yet loaded.\n   */\n  forDataAtCoordinate(coordinate, callback, request) {\n    if (this.state == TileState.EMPTY && request === true) {\n      this.state = TileState.IDLE;\n      listenOnce(\n        this,\n        EventType.CHANGE,\n        function (e) {\n          callback(this.getData(coordinate));\n        },\n        this\n      );\n      this.loadInternal_();\n    } else {\n      if (request === true) {\n        setTimeout(() => {\n          callback(this.getData(coordinate));\n        }, 0);\n      } else {\n        callback(this.getData(coordinate));\n      }\n    }\n  }\n\n  /**\n   * Return the key to be used for all tiles in the source.\n   * @return {string} The key for all tiles.\n   */\n  getKey() {\n    return this.src_;\n  }\n\n  /**\n   * @private\n   */\n  handleError_() {\n    this.state = TileState.ERROR;\n    this.changed();\n  }\n\n  /**\n   * @param {!UTFGridJSON} json UTFGrid data.\n   * @private\n   */\n  handleLoad_(json) {\n    this.grid_ = json['grid'];\n    this.keys_ = json['keys'];\n    this.data_ = json['data'];\n\n    this.state = TileState.LOADED;\n    this.changed();\n  }\n\n  /**\n   * @private\n   */\n  loadInternal_() {\n    if (this.state == TileState.IDLE) {\n      this.state = TileState.LOADING;\n      if (this.jsonp_) {\n        requestJSONP(\n          this.src_,\n          this.handleLoad_.bind(this),\n          this.handleError_.bind(this)\n        );\n      } else {\n        const client = new XMLHttpRequest();\n        client.addEventListener('load', this.onXHRLoad_.bind(this));\n        client.addEventListener('error', this.onXHRError_.bind(this));\n        client.open('GET', this.src_);\n        client.send();\n      }\n    }\n  }\n\n  /**\n   * @private\n   * @param {Event} event The load event.\n   */\n  onXHRLoad_(event) {\n    const client = /** @type {XMLHttpRequest} */ (event.target);\n    // status will be 0 for file:// urls\n    if (!client.status || (client.status >= 200 && client.status < 300)) {\n      let response;\n      try {\n        response = /** @type {!UTFGridJSON} */ (\n          JSON.parse(client.responseText)\n        );\n      } catch (err) {\n        this.handleError_();\n        return;\n      }\n      this.handleLoad_(response);\n    } else {\n      this.handleError_();\n    }\n  }\n\n  /**\n   * @private\n   * @param {Event} event The error event.\n   */\n  onXHRError_(event) {\n    this.handleError_();\n  }\n\n  /**\n   */\n  load() {\n    if (this.preemptive_) {\n      this.loadInternal_();\n    } else {\n      this.setState(TileState.EMPTY);\n    }\n  }\n}\n\n/**\n * @typedef {Object} Options\n * @property {boolean} [preemptive=true]\n * If `true` the UTFGrid source loads the tiles based on their \"visibility\".\n * This improves the speed of response, but increases traffic.\n * Note that if set to `false` (lazy loading), you need to pass `true` as\n * `request` to the `forDataAtCoordinateAndResolution` method otherwise no\n * data will ever be loaded.\n * @property {boolean} [jsonp=false] Use JSONP with callback to load the TileJSON.\n * Useful when the server does not support CORS..\n * @property {import(\"./TileJSON.js\").Config} [tileJSON] TileJSON configuration for this source.\n * If not provided, `url` must be configured.\n * @property {string} [url] TileJSON endpoint that provides the configuration for this source.\n * Request will be made through JSONP. If not provided, `tileJSON` must be configured.\n * @property {number|import(\"../array.js\").NearestDirectionFunction} [zDirection=0]\n * Choose whether to use tiles with a higher or lower zoom level when between integer\n * zoom levels. See {@link module:ol/tilegrid/TileGrid~TileGrid#getZForResolution}.\n */\n\n/**\n * @classdesc\n * Layer source for UTFGrid interaction data loaded from TileJSON format.\n * @api\n */\nclass UTFGrid extends TileSource {\n  /**\n   * @param {Options} options Source options.\n   */\n  constructor(options) {\n    super({\n      projection: getProjection('EPSG:3857'),\n      state: 'loading',\n      zDirection: options.zDirection,\n    });\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.preemptive_ =\n      options.preemptive !== undefined ? options.preemptive : true;\n\n    /**\n     * @private\n     * @type {!import(\"../Tile.js\").UrlFunction}\n     */\n    this.tileUrlFunction_ = nullTileUrlFunction;\n\n    /**\n     * @private\n     * @type {string|undefined}\n     */\n    this.template_ = undefined;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.jsonp_ = options.jsonp || false;\n\n    if (options.url) {\n      if (this.jsonp_) {\n        requestJSONP(\n          options.url,\n          this.handleTileJSONResponse.bind(this),\n          this.handleTileJSONError.bind(this)\n        );\n      } else {\n        const client = new XMLHttpRequest();\n        client.addEventListener('load', this.onXHRLoad_.bind(this));\n        client.addEventListener('error', this.onXHRError_.bind(this));\n        client.open('GET', options.url);\n        client.send();\n      }\n    } else if (options.tileJSON) {\n      this.handleTileJSONResponse(options.tileJSON);\n    } else {\n      assert(false, 51); // Either `url` or `tileJSON` options must be provided\n    }\n  }\n\n  /**\n   * @private\n   * @param {Event} event The load event.\n   */\n  onXHRLoad_(event) {\n    const client = /** @type {XMLHttpRequest} */ (event.target);\n    // status will be 0 for file:// urls\n    if (!client.status || (client.status >= 200 && client.status < 300)) {\n      let response;\n      try {\n        response = /** @type {import(\"./TileJSON.js\").Config} */ (\n          JSON.parse(client.responseText)\n        );\n      } catch (err) {\n        this.handleTileJSONError();\n        return;\n      }\n      this.handleTileJSONResponse(response);\n    } else {\n      this.handleTileJSONError();\n    }\n  }\n\n  /**\n   * @private\n   * @param {Event} event The error event.\n   */\n  onXHRError_(event) {\n    this.handleTileJSONError();\n  }\n\n  /**\n   * Return the template from TileJSON.\n   * @return {string|undefined} The template from TileJSON.\n   * @api\n   */\n  getTemplate() {\n    return this.template_;\n  }\n\n  /**\n   * Calls the callback (synchronously by default) with the available data\n   * for given coordinate and resolution (or `null` if not yet loaded or\n   * in case of an error).\n   * @param {import(\"../coordinate.js\").Coordinate} coordinate Coordinate.\n   * @param {number} resolution Resolution.\n   * @param {function(*): void} callback Callback.\n   * @param {boolean} [request] If `true` the callback is always async.\n   *                               The tile data is requested if not yet loaded.\n   * @api\n   */\n  forDataAtCoordinateAndResolution(coordinate, resolution, callback, request) {\n    if (this.tileGrid) {\n      const z = this.tileGrid.getZForResolution(resolution, this.zDirection);\n      const tileCoord = this.tileGrid.getTileCoordForCoordAndZ(coordinate, z);\n      const tile = /** @type {!CustomTile} */ (\n        this.getTile(\n          tileCoord[0],\n          tileCoord[1],\n          tileCoord[2],\n          1,\n          this.getProjection()\n        )\n      );\n      tile.forDataAtCoordinate(coordinate, callback, request);\n    } else {\n      if (request === true) {\n        setTimeout(function () {\n          callback(null);\n        }, 0);\n      } else {\n        callback(null);\n      }\n    }\n  }\n\n  /**\n   * @protected\n   */\n  handleTileJSONError() {\n    this.setState('error');\n  }\n\n  /**\n   * TODO: very similar to ol/source/TileJSON#handleTileJSONResponse\n   * @protected\n   * @param {import(\"./TileJSON.js\").Config} tileJSON Tile JSON.\n   */\n  handleTileJSONResponse(tileJSON) {\n    const epsg4326Projection = getProjection('EPSG:4326');\n\n    const sourceProjection = this.getProjection();\n    let extent;\n    if (tileJSON['bounds'] !== undefined) {\n      const transform = getTransformFromProjections(\n        epsg4326Projection,\n        sourceProjection\n      );\n      extent = applyTransform(tileJSON['bounds'], transform);\n    }\n\n    const gridExtent = extentFromProjection(sourceProjection);\n    const minZoom = tileJSON['minzoom'] || 0;\n    const maxZoom = tileJSON['maxzoom'] || 22;\n    const tileGrid = createXYZ({\n      extent: gridExtent,\n      maxZoom: maxZoom,\n      minZoom: minZoom,\n    });\n    this.tileGrid = tileGrid;\n\n    this.template_ = tileJSON['template'];\n\n    const grids = tileJSON['grids'];\n    if (!grids) {\n      this.setState('error');\n      return;\n    }\n\n    this.tileUrlFunction_ = createFromTemplates(grids, tileGrid);\n\n    if (tileJSON['attribution'] !== undefined) {\n      const attributionExtent = extent !== undefined ? extent : gridExtent;\n      this.setAttributions(function (frameState) {\n        if (intersects(attributionExtent, frameState.extent)) {\n          return [tileJSON['attribution']];\n        }\n        return null;\n      });\n    }\n\n    this.setState('ready');\n  }\n\n  /**\n   * @param {number} z Tile coordinate z.\n   * @param {number} x Tile coordinate x.\n   * @param {number} y Tile coordinate y.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   * @return {!CustomTile} Tile.\n   */\n  getTile(z, x, y, pixelRatio, projection) {\n    const tileCoordKey = getKeyZXY(z, x, y);\n    if (this.tileCache.containsKey(tileCoordKey)) {\n      return this.tileCache.get(tileCoordKey);\n    }\n    const tileCoord = [z, x, y];\n    const urlTileCoord = this.getTileCoordForTileUrlFunction(\n      tileCoord,\n      projection\n    );\n    const tileUrl = this.tileUrlFunction_(urlTileCoord, pixelRatio, projection);\n    const tile = new CustomTile(\n      tileCoord,\n      tileUrl !== undefined ? TileState.IDLE : TileState.EMPTY,\n      tileUrl !== undefined ? tileUrl : '',\n      this.tileGrid.getTileCoordExtent(tileCoord),\n      this.preemptive_,\n      this.jsonp_\n    );\n    this.tileCache.set(tileCoordKey, tile);\n    return tile;\n  }\n\n  /**\n   * Marks a tile coord as being used, without triggering a load.\n   * @param {number} z Tile coordinate z.\n   * @param {number} x Tile coordinate x.\n   * @param {number} y Tile coordinate y.\n   */\n  useTile(z, x, y) {\n    const tileCoordKey = getKeyZXY(z, x, y);\n    if (this.tileCache.containsKey(tileCoordKey)) {\n      this.tileCache.get(tileCoordKey);\n    }\n  }\n}\n\nexport default UTFGrid;\n","/**\n * @module ol/source/VectorTile\n */\n\nimport EventType from '../events/EventType.js';\nimport Tile from '../VectorTile.js';\nimport TileCache from '../TileCache.js';\nimport TileGrid from '../tilegrid/TileGrid.js';\nimport TileState from '../TileState.js';\nimport UrlTile from './UrlTile.js';\nimport VectorRenderTile from '../VectorRenderTile.js';\nimport {DEFAULT_MAX_ZOOM} from '../tilegrid/common.js';\nimport {\n  buffer as bufferExtent,\n  getIntersection,\n  intersects,\n} from '../extent.js';\nimport {createXYZ, extentFromProjection} from '../tilegrid.js';\nimport {fromKey, getCacheKeyForTileKey, getKeyZXY} from '../tilecoord.js';\nimport {isEmpty} from '../obj.js';\nimport {loadFeaturesXhr} from '../featureloader.js';\nimport {toSize} from '../size.js';\n\n/**\n * @typedef {Object} Options\n * @property {import(\"./Source.js\").AttributionLike} [attributions] Attributions.\n * @property {boolean} [attributionsCollapsible=true] Attributions are collapsible.\n * @property {number} [cacheSize] Initial tile cache size. Will auto-grow to hold at least twice the number of tiles in the viewport.\n * @property {import(\"../extent.js\").Extent} [extent] Extent.\n * @property {import(\"../format/Feature.js\").default} [format] Feature format for tiles. Used and required by the default.\n * @property {boolean} [overlaps=true] This source may have overlapping geometries. Setting this\n * to `false` (e.g. for sources with polygons that represent administrative\n * boundaries or TopoJSON sources) allows the renderer to optimise fill and\n * stroke operations.\n * @property {import(\"../proj.js\").ProjectionLike} [projection='EPSG:3857'] Projection of the tile grid.\n * @property {import(\"./Source.js\").State} [state] Source state.\n * @property {typeof import(\"../VectorTile.js\").default} [tileClass] Class used to instantiate image tiles.\n * Default is {@link module:ol/VectorTile~VectorTile}.\n * @property {number} [maxZoom=22] Optional max zoom level. Not used if `tileGrid` is provided.\n * @property {number} [minZoom] Optional min zoom level. Not used if `tileGrid` is provided.\n * @property {number|import(\"../size.js\").Size} [tileSize=512] Optional tile size. Not used if `tileGrid` is provided.\n * @property {number} [maxResolution] Optional tile grid resolution at level zero. Not used if `tileGrid` is provided.\n * @property {import(\"../tilegrid/TileGrid.js\").default} [tileGrid] Tile grid.\n * @property {import(\"../Tile.js\").LoadFunction} [tileLoadFunction]\n * Optional function to load a tile given a URL. Could look like this for pbf tiles:\n * ```js\n * function(tile, url) {\n *   tile.setLoader(function(extent, resolution, projection) {\n *     fetch(url).then(function(response) {\n *       response.arrayBuffer().then(function(data) {\n *         const format = tile.getFormat() // ol/format/MVT configured as source format\n *         const features = format.readFeatures(data, {\n *           extent: extent,\n *           featureProjection: projection\n *         });\n *         tile.setFeatures(features);\n *       });\n *     });\n *   });\n * }\n * ```\n * If you do not need extent, resolution and projection to get the features for a tile (e.g.\n * for GeoJSON tiles), your `tileLoadFunction` does not need a `setLoader()` call. Only make sure\n * to call `setFeatures()` on the tile:\n * ```js\n * const format = new GeoJSON({featureProjection: map.getView().getProjection()});\n * async function tileLoadFunction(tile, url) {\n *   const response = await fetch(url);\n *   const data = await response.json();\n *   tile.setFeatures(format.readFeatures(data));\n * }\n * ```\n * @property {import(\"../Tile.js\").UrlFunction} [tileUrlFunction] Optional function to get tile URL given a tile coordinate and the projection.\n * @property {string} [url] URL template. Must include `{x}`, `{y}` or `{-y}`, and `{z}` placeholders.\n * A `{?-?}` template pattern, for example `subdomain{a-f}.domain.com`, may be\n * used instead of defining each one separately in the `urls` option.\n * @property {number} [transition] A duration for tile opacity\n * transitions in milliseconds. A duration of 0 disables the opacity transition.\n * @property {Array<string>} [urls] An array of URL templates.\n * @property {boolean} [wrapX=true] Whether to wrap the world horizontally.\n * When set to `false`, only one world\n * will be rendered. When set to `true`, tiles will be wrapped horizontally to\n * render multiple worlds.\n * @property {number|import(\"../array.js\").NearestDirectionFunction} [zDirection=1]\n * Choose whether to use tiles with a higher or lower zoom level when between integer\n * zoom levels. See {@link module:ol/tilegrid/TileGrid~TileGrid#getZForResolution}.\n */\n\n/**\n * @classdesc\n * Class for layer sources providing vector data divided into a tile grid, to be\n * used with {@link module:ol/layer/VectorTile~VectorTileLayer}. Although this source receives tiles\n * with vector features from the server, it is not meant for feature editing.\n * Features are optimized for rendering, their geometries are clipped at or near\n * tile boundaries and simplified for a view resolution. See\n * {@link module:ol/source/Vector~VectorSource} for vector sources that are suitable for feature\n * editing.\n *\n * @fires import(\"./Tile.js\").TileSourceEvent\n * @api\n */\nclass VectorTile extends UrlTile {\n  /**\n   * @param {!Options} options Vector tile options.\n   */\n  constructor(options) {\n    const projection = options.projection || 'EPSG:3857';\n\n    const extent = options.extent || extentFromProjection(projection);\n\n    const tileGrid =\n      options.tileGrid ||\n      createXYZ({\n        extent: extent,\n        maxResolution: options.maxResolution,\n        maxZoom: options.maxZoom !== undefined ? options.maxZoom : 22,\n        minZoom: options.minZoom,\n        tileSize: options.tileSize || 512,\n      });\n\n    super({\n      attributions: options.attributions,\n      attributionsCollapsible: options.attributionsCollapsible,\n      cacheSize: options.cacheSize,\n      interpolate: true,\n      opaque: false,\n      projection: projection,\n      state: options.state,\n      tileGrid: tileGrid,\n      tileLoadFunction: options.tileLoadFunction\n        ? options.tileLoadFunction\n        : defaultLoadFunction,\n      tileUrlFunction: options.tileUrlFunction,\n      url: options.url,\n      urls: options.urls,\n      wrapX: options.wrapX === undefined ? true : options.wrapX,\n      transition: options.transition,\n      zDirection: options.zDirection === undefined ? 1 : options.zDirection,\n    });\n\n    /**\n     * @private\n     * @type {import(\"../format/Feature.js\").default|null}\n     */\n    this.format_ = options.format ? options.format : null;\n\n    /**\n     * @private\n     * @type {TileCache}\n     */\n    this.sourceTileCache = new TileCache(this.tileCache.highWaterMark);\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.overlaps_ = options.overlaps == undefined ? true : options.overlaps;\n\n    /**\n     * @protected\n     * @type {typeof import(\"../VectorTile.js\").default}\n     */\n    this.tileClass = options.tileClass ? options.tileClass : Tile;\n\n    /**\n     * @private\n     * @type {Object<string, import(\"../tilegrid/TileGrid.js\").default>}\n     */\n    this.tileGrids_ = {};\n  }\n\n  /**\n   * Get features whose bounding box intersects the provided extent. Only features for cached\n   * tiles for the last rendered zoom level are available in the source. So this method is only\n   * suitable for requesting tiles for extents that are currently rendered.\n   *\n   * Features are returned in random tile order and as they are included in the tiles. This means\n   * they can be clipped, duplicated across tiles, and simplified to the render resolution.\n   *\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @return {Array<import(\"../Feature.js\").FeatureLike>} Features.\n   * @api\n   */\n  getFeaturesInExtent(extent) {\n    const features = [];\n    const tileCache = this.tileCache;\n    if (tileCache.getCount() === 0) {\n      return features;\n    }\n    const z = fromKey(tileCache.peekFirstKey())[0];\n    const tileGrid = this.tileGrid;\n    tileCache.forEach(function (tile) {\n      if (tile.tileCoord[0] !== z || tile.getState() !== TileState.LOADED) {\n        return;\n      }\n      const sourceTiles = tile.getSourceTiles();\n      for (let i = 0, ii = sourceTiles.length; i < ii; ++i) {\n        const sourceTile = sourceTiles[i];\n        const tileCoord = sourceTile.tileCoord;\n        if (intersects(extent, tileGrid.getTileCoordExtent(tileCoord))) {\n          const tileFeatures = sourceTile.getFeatures();\n          if (tileFeatures) {\n            for (let j = 0, jj = tileFeatures.length; j < jj; ++j) {\n              const candidate = tileFeatures[j];\n              const geometry = candidate.getGeometry();\n              if (intersects(extent, geometry.getExtent())) {\n                features.push(candidate);\n              }\n            }\n          }\n        }\n      }\n    });\n    return features;\n  }\n\n  /**\n   * @return {boolean} The source can have overlapping geometries.\n   */\n  getOverlaps() {\n    return this.overlaps_;\n  }\n\n  /**\n   * clear {@link module:ol/TileCache~TileCache} and delete all source tiles\n   * @api\n   */\n  clear() {\n    this.tileCache.clear();\n    this.sourceTileCache.clear();\n  }\n\n  /**\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   * @param {!Object<string, boolean>} usedTiles Used tiles.\n   */\n  expireCache(projection, usedTiles) {\n    const tileCache = this.getTileCacheForProjection(projection);\n    const usedSourceTiles = Object.keys(usedTiles).reduce((acc, key) => {\n      const cacheKey = getCacheKeyForTileKey(key);\n      const tile = tileCache.peek(cacheKey);\n      if (tile) {\n        const sourceTiles = tile.sourceTiles;\n        for (let i = 0, ii = sourceTiles.length; i < ii; ++i) {\n          acc[sourceTiles[i].getKey()] = true;\n        }\n      }\n      return acc;\n    }, {});\n    super.expireCache(projection, usedTiles);\n    this.sourceTileCache.expireCache(usedSourceTiles);\n  }\n\n  /**\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {import(\"../proj/Projection\").default} projection Projection.\n   * @param {VectorRenderTile} tile Vector image tile.\n   * @return {Array<import(\"../VectorTile\").default>} Tile keys.\n   */\n  getSourceTiles(pixelRatio, projection, tile) {\n    if (tile.getState() === TileState.IDLE) {\n      tile.setState(TileState.LOADING);\n      const urlTileCoord = tile.wrappedTileCoord;\n      const tileGrid = this.getTileGridForProjection(projection);\n      const extent = tileGrid.getTileCoordExtent(urlTileCoord);\n      const z = urlTileCoord[0];\n      const resolution = tileGrid.getResolution(z);\n      // make extent 1 pixel smaller so we don't load tiles for < 0.5 pixel render space\n      bufferExtent(extent, -resolution, extent);\n      const sourceTileGrid = this.tileGrid;\n      const sourceExtent = sourceTileGrid.getExtent();\n      if (sourceExtent) {\n        getIntersection(extent, sourceExtent, extent);\n      }\n      const sourceZ = sourceTileGrid.getZForResolution(\n        resolution,\n        this.zDirection\n      );\n\n      sourceTileGrid.forEachTileCoord(extent, sourceZ, (sourceTileCoord) => {\n        const tileUrl = this.tileUrlFunction(\n          sourceTileCoord,\n          pixelRatio,\n          projection\n        );\n        const sourceTile = this.sourceTileCache.containsKey(tileUrl)\n          ? this.sourceTileCache.get(tileUrl)\n          : new this.tileClass(\n              sourceTileCoord,\n              tileUrl ? TileState.IDLE : TileState.EMPTY,\n              tileUrl,\n              this.format_,\n              this.tileLoadFunction\n            );\n        tile.sourceTiles.push(sourceTile);\n        const sourceTileState = sourceTile.getState();\n        if (sourceTileState < TileState.LOADED) {\n          const listenChange = (event) => {\n            this.handleTileChange(event);\n            const state = sourceTile.getState();\n            if (state === TileState.LOADED || state === TileState.ERROR) {\n              const sourceTileKey = sourceTile.getKey();\n              if (sourceTileKey in tile.errorTileKeys) {\n                if (sourceTile.getState() === TileState.LOADED) {\n                  delete tile.errorTileKeys[sourceTileKey];\n                }\n              } else {\n                tile.loadingSourceTiles--;\n              }\n              if (state === TileState.ERROR) {\n                tile.errorTileKeys[sourceTileKey] = true;\n              } else {\n                sourceTile.removeEventListener(EventType.CHANGE, listenChange);\n              }\n              if (tile.loadingSourceTiles === 0) {\n                tile.setState(\n                  isEmpty(tile.errorTileKeys)\n                    ? TileState.LOADED\n                    : TileState.ERROR\n                );\n              }\n            }\n          };\n          sourceTile.addEventListener(EventType.CHANGE, listenChange);\n          tile.loadingSourceTiles++;\n        }\n        if (sourceTileState === TileState.IDLE) {\n          sourceTile.extent =\n            sourceTileGrid.getTileCoordExtent(sourceTileCoord);\n          sourceTile.projection = projection;\n          sourceTile.resolution = sourceTileGrid.getResolution(\n            sourceTileCoord[0]\n          );\n          this.sourceTileCache.set(tileUrl, sourceTile);\n          sourceTile.load();\n        }\n      });\n      if (!tile.loadingSourceTiles) {\n        tile.setState(\n          tile.sourceTiles.some(\n            (sourceTile) => sourceTile.getState() === TileState.ERROR\n          )\n            ? TileState.ERROR\n            : TileState.LOADED\n        );\n      }\n    }\n\n    return tile.sourceTiles;\n  }\n\n  /**\n   * @param {number} z Tile coordinate z.\n   * @param {number} x Tile coordinate x.\n   * @param {number} y Tile coordinate y.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   * @return {!VectorRenderTile} Tile.\n   */\n  getTile(z, x, y, pixelRatio, projection) {\n    const coordKey = getKeyZXY(z, x, y);\n    const key = this.getKey();\n    let tile;\n    if (this.tileCache.containsKey(coordKey)) {\n      tile = this.tileCache.get(coordKey);\n      if (tile.key === key) {\n        return tile;\n      }\n    }\n    const tileCoord = [z, x, y];\n    let urlTileCoord = this.getTileCoordForTileUrlFunction(\n      tileCoord,\n      projection\n    );\n    const sourceExtent = this.getTileGrid().getExtent();\n    const tileGrid = this.getTileGridForProjection(projection);\n    if (urlTileCoord && sourceExtent) {\n      const tileExtent = tileGrid.getTileCoordExtent(urlTileCoord);\n      // make extent 1 pixel smaller so we don't load tiles for < 0.5 pixel render space\n      bufferExtent(tileExtent, -tileGrid.getResolution(z), tileExtent);\n      if (!intersects(sourceExtent, tileExtent)) {\n        urlTileCoord = null;\n      }\n    }\n    let empty = true;\n    if (urlTileCoord !== null) {\n      const sourceTileGrid = this.tileGrid;\n      const resolution = tileGrid.getResolution(z);\n      const sourceZ = sourceTileGrid.getZForResolution(resolution, 1);\n      // make extent 1 pixel smaller so we don't load tiles for < 0.5 pixel render space\n      const extent = tileGrid.getTileCoordExtent(urlTileCoord);\n      bufferExtent(extent, -resolution, extent);\n      sourceTileGrid.forEachTileCoord(extent, sourceZ, (sourceTileCoord) => {\n        empty =\n          empty &&\n          !this.tileUrlFunction(sourceTileCoord, pixelRatio, projection);\n      });\n    }\n    const newTile = new VectorRenderTile(\n      tileCoord,\n      empty ? TileState.EMPTY : TileState.IDLE,\n      urlTileCoord,\n      this.getSourceTiles.bind(this, pixelRatio, projection)\n    );\n\n    newTile.key = key;\n    if (tile) {\n      newTile.interimTile = tile;\n      newTile.refreshInterimChain();\n      this.tileCache.replace(coordKey, newTile);\n    } else {\n      this.tileCache.set(coordKey, newTile);\n    }\n    return newTile;\n  }\n\n  /**\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   * @return {!import(\"../tilegrid/TileGrid.js\").default} Tile grid.\n   */\n  getTileGridForProjection(projection) {\n    const code = projection.getCode();\n    let tileGrid = this.tileGrids_[code];\n    if (!tileGrid) {\n      // A tile grid that matches the tile size of the source tile grid is more\n      // likely to have 1:1 relationships between source tiles and rendered tiles.\n      const sourceTileGrid = this.tileGrid;\n      const resolutions = sourceTileGrid.getResolutions().slice();\n      const origins = resolutions.map(function (resolution, z) {\n        return sourceTileGrid.getOrigin(z);\n      });\n      const tileSizes = resolutions.map(function (resolution, z) {\n        return sourceTileGrid.getTileSize(z);\n      });\n      const length = DEFAULT_MAX_ZOOM + 1;\n      for (let z = resolutions.length; z < length; ++z) {\n        resolutions.push(resolutions[z - 1] / 2);\n        origins.push(origins[z - 1]);\n        tileSizes.push(tileSizes[z - 1]);\n      }\n      tileGrid = new TileGrid({\n        extent: sourceTileGrid.getExtent(),\n        origins: origins,\n        resolutions: resolutions,\n        tileSizes: tileSizes,\n      });\n      this.tileGrids_[code] = tileGrid;\n    }\n    return tileGrid;\n  }\n\n  /**\n   * Get the tile pixel ratio for this source.\n   * @param {number} pixelRatio Pixel ratio.\n   * @return {number} Tile pixel ratio.\n   */\n  getTilePixelRatio(pixelRatio) {\n    return pixelRatio;\n  }\n\n  /**\n   * @param {number} z Z.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   * @return {import(\"../size.js\").Size} Tile size.\n   */\n  getTilePixelSize(z, pixelRatio, projection) {\n    const tileGrid = this.getTileGridForProjection(projection);\n    const tileSize = toSize(tileGrid.getTileSize(z), this.tmpSize);\n    return [\n      Math.round(tileSize[0] * pixelRatio),\n      Math.round(tileSize[1] * pixelRatio),\n    ];\n  }\n\n  /**\n   * Increases the cache size if needed\n   * @param {number} tileCount Minimum number of tiles needed.\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   */\n  updateCacheSize(tileCount, projection) {\n    super.updateCacheSize(tileCount * 2, projection);\n    this.sourceTileCache.highWaterMark =\n      this.getTileCacheForProjection(projection).highWaterMark;\n  }\n}\n\nexport default VectorTile;\n\n/**\n * Sets the loader for a tile.\n * @param {import(\"../VectorTile.js\").default} tile Vector tile.\n * @param {string} url URL.\n */\nexport function defaultLoadFunction(tile, url) {\n  tile.setLoader(\n    /**\n     * @param {import(\"../extent.js\").Extent} extent Extent.\n     * @param {number} resolution Resolution.\n     * @param {import(\"../proj/Projection.js\").default} projection Projection.\n     */\n    function (extent, resolution, projection) {\n      loadFeaturesXhr(\n        url,\n        tile.getFormat(),\n        extent,\n        resolution,\n        projection,\n        tile.onLoad.bind(tile),\n        tile.onError.bind(tile)\n      );\n    }\n  );\n}\n","/**\n * @module ol/tilegrid/WMTS\n */\n\nimport TileGrid from './TileGrid.js';\nimport {get as getProjection} from '../proj.js';\n\n/**\n * @typedef {Object} Options\n * @property {import(\"../extent.js\").Extent} [extent] Extent for the tile grid. No tiles\n * outside this extent will be requested by {@link module:ol/source/Tile~TileSource} sources.\n * When no `origin` or `origins` are configured, the `origin` will be set to the\n * top-left corner of the extent.\n * @property {import(\"../coordinate.js\").Coordinate} [origin] The tile grid origin, i.e.\n * where the `x` and `y` axes meet (`[z, 0, 0]`). Tile coordinates increase left\n * to right and downwards. If not specified, `extent` or `origins` must be provided.\n * @property {Array<import(\"../coordinate.js\").Coordinate>} [origins] Tile grid origins,\n * i.e. where the `x` and `y` axes meet (`[z, 0, 0]`), for each zoom level. If\n * given, the array length should match the length of the `resolutions` array, i.e.\n * each resolution can have a different origin. Tile coordinates increase left to\n * right and downwards. If not specified, `extent` or `origin` must be provided.\n * @property {!Array<number>} resolutions Resolutions. The array index of each\n * resolution needs to match the zoom level. This means that even if a `minZoom`\n * is configured, the resolutions array will have a length of `maxZoom + 1`\n * @property {!Array<string>} matrixIds matrix IDs. The length of this array needs\n * to match the length of the `resolutions` array.\n * @property {Array<import(\"../size.js\").Size>} [sizes] Number of tile rows and columns\n * of the grid for each zoom level. The values here are the `TileMatrixWidth` and\n * `TileMatrixHeight` advertised in the GetCapabilities response of the WMTS, and\n * define each zoom level's extent together with the `origin` or `origins`.\n * A grid `extent` can be configured in addition, and will further limit the extent for\n * which tile requests are made by sources. If the bottom-left corner of\n * an extent is used as `origin` or `origins`, then the `y` value must be\n * negative because OpenLayers tile coordinates use the top left as the origin.\n * @property {number|import(\"../size.js\").Size} [tileSize] Tile size.\n * @property {Array<number|import(\"../size.js\").Size>} [tileSizes] Tile sizes. The length of\n * this array needs to match the length of the `resolutions` array.\n */\n\n/**\n * @classdesc\n * Set the grid pattern for sources accessing WMTS tiled-image servers.\n * @api\n */\nclass WMTSTileGrid extends TileGrid {\n  /**\n   * @param {Options} options WMTS options.\n   */\n  constructor(options) {\n    super({\n      extent: options.extent,\n      origin: options.origin,\n      origins: options.origins,\n      resolutions: options.resolutions,\n      tileSize: options.tileSize,\n      tileSizes: options.tileSizes,\n      sizes: options.sizes,\n    });\n\n    /**\n     * @private\n     * @type {!Array<string>}\n     */\n    this.matrixIds_ = options.matrixIds;\n  }\n\n  /**\n   * @param {number} z Z.\n   * @return {string} MatrixId..\n   */\n  getMatrixId(z) {\n    return this.matrixIds_[z];\n  }\n\n  /**\n   * Get the list of matrix identifiers.\n   * @return {Array<string>} MatrixIds.\n   * @api\n   */\n  getMatrixIds() {\n    return this.matrixIds_;\n  }\n}\n\nexport default WMTSTileGrid;\n\n/**\n * Create a tile grid from a WMTS capabilities matrix set and an\n * optional TileMatrixSetLimits.\n * @param {Object} matrixSet An object representing a matrixSet in the\n *     capabilities document.\n * @param {import(\"../extent.js\").Extent} [extent] An optional extent to restrict the tile\n *     ranges the server provides.\n * @param {Array<Object>} [matrixLimits] An optional object representing\n *     the available matrices for tileGrid.\n * @return {WMTSTileGrid} WMTS tileGrid instance.\n * @api\n */\nexport function createFromCapabilitiesMatrixSet(\n  matrixSet,\n  extent,\n  matrixLimits\n) {\n  /** @type {!Array<number>} */\n  const resolutions = [];\n  /** @type {!Array<string>} */\n  const matrixIds = [];\n  /** @type {!Array<import(\"../coordinate.js\").Coordinate>} */\n  const origins = [];\n  /** @type {!Array<number|import(\"../size.js\").Size>} */\n  const tileSizes = [];\n  /** @type {!Array<import(\"../size.js\").Size>} */\n  const sizes = [];\n\n  matrixLimits = matrixLimits !== undefined ? matrixLimits : [];\n\n  const supportedCRSPropName = 'SupportedCRS';\n  const matrixIdsPropName = 'TileMatrix';\n  const identifierPropName = 'Identifier';\n  const scaleDenominatorPropName = 'ScaleDenominator';\n  const topLeftCornerPropName = 'TopLeftCorner';\n  const tileWidthPropName = 'TileWidth';\n  const tileHeightPropName = 'TileHeight';\n\n  const code = matrixSet[supportedCRSPropName];\n  const projection = getProjection(code);\n  const metersPerUnit = projection.getMetersPerUnit();\n  // swap origin x and y coordinates if axis orientation is lat/long\n  const switchOriginXY = projection.getAxisOrientation().substr(0, 2) == 'ne';\n\n  matrixSet[matrixIdsPropName].sort(function (a, b) {\n    return b[scaleDenominatorPropName] - a[scaleDenominatorPropName];\n  });\n\n  matrixSet[matrixIdsPropName].forEach(function (elt) {\n    let matrixAvailable;\n    // use of matrixLimits to filter TileMatrices from GetCapabilities\n    // TileMatrixSet from unavailable matrix levels.\n    if (matrixLimits.length > 0) {\n      matrixAvailable = matrixLimits.find(function (elt_ml) {\n        if (elt[identifierPropName] == elt_ml[matrixIdsPropName]) {\n          return true;\n        }\n        // Fallback for tileMatrix identifiers that don't get prefixed\n        // by their tileMatrixSet identifiers.\n        if (!elt[identifierPropName].includes(':')) {\n          return (\n            matrixSet[identifierPropName] + ':' + elt[identifierPropName] ===\n            elt_ml[matrixIdsPropName]\n          );\n        }\n        return false;\n      });\n    } else {\n      matrixAvailable = true;\n    }\n\n    if (matrixAvailable) {\n      matrixIds.push(elt[identifierPropName]);\n      const resolution =\n        (elt[scaleDenominatorPropName] * 0.28e-3) / metersPerUnit;\n      const tileWidth = elt[tileWidthPropName];\n      const tileHeight = elt[tileHeightPropName];\n      if (switchOriginXY) {\n        origins.push([\n          elt[topLeftCornerPropName][1],\n          elt[topLeftCornerPropName][0],\n        ]);\n      } else {\n        origins.push(elt[topLeftCornerPropName]);\n      }\n      resolutions.push(resolution);\n      tileSizes.push(\n        tileWidth == tileHeight ? tileWidth : [tileWidth, tileHeight]\n      );\n      sizes.push([elt['MatrixWidth'], elt['MatrixHeight']]);\n    }\n  });\n\n  return new WMTSTileGrid({\n    extent: extent,\n    origins: origins,\n    resolutions: resolutions,\n    matrixIds: matrixIds,\n    tileSizes: tileSizes,\n    sizes: sizes,\n  });\n}\n","/**\n * @module ol/source/WMTS\n */\n\nimport TileImage from './TileImage.js';\nimport {appendParams} from '../uri.js';\nimport {containsExtent} from '../extent.js';\nimport {createFromCapabilitiesMatrixSet} from '../tilegrid/WMTS.js';\nimport {createFromTileUrlFunctions, expandUrl} from '../tileurlfunction.js';\nimport {equivalent, get as getProjection, transformExtent} from '../proj.js';\n\n/**\n * Request encoding. One of 'KVP', 'REST'.\n * @typedef {'KVP' | 'REST'} RequestEncoding\n */\n\n/**\n * @typedef {Object} Options\n * @property {import(\"./Source.js\").AttributionLike} [attributions] Attributions.\n * @property {boolean} [attributionsCollapsible=true] Attributions are collapsible.\n * @property {number} [cacheSize] Initial tile cache size. Will auto-grow to hold at least the number of tiles in the viewport.\n * @property {null|string} [crossOrigin] The `crossOrigin` attribute for loaded images.  Note that\n * you must provide a `crossOrigin` value if you want to access pixel data with the Canvas renderer.\n * See https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image for more detail.\n * @property {boolean} [interpolate=true] Use interpolated values when resampling.  By default,\n * linear interpolation is used when resampling.  Set to false to use the nearest neighbor instead.\n * @property {import(\"../tilegrid/WMTS.js\").default} tileGrid Tile grid.\n * @property {import(\"../proj.js\").ProjectionLike} [projection] Projection. Default is the view projection.\n * @property {number} [reprojectionErrorThreshold=0.5] Maximum allowed reprojection error (in pixels).\n * Higher values can increase reprojection performance, but decrease precision.\n * @property {RequestEncoding} [requestEncoding='KVP'] Request encoding.\n * @property {string} layer Layer name as advertised in the WMTS capabilities.\n * @property {string} style Style name as advertised in the WMTS capabilities.\n * @property {typeof import(\"../ImageTile.js\").default} [tileClass]  Class used to instantiate image tiles. Default is {@link module:ol/ImageTile~ImageTile}.\n * @property {number} [tilePixelRatio=1] The pixel ratio used by the tile service.\n * For example, if the tile service advertizes 256px by 256px tiles but actually sends 512px\n * by 512px images (for retina/hidpi devices) then `tilePixelRatio`\n * should be set to `2`.\n * @property {string} [format='image/jpeg'] Image format. Only used when `requestEncoding` is `'KVP'`.\n * @property {string} [version='1.0.0'] WMTS version.\n * @property {string} matrixSet Matrix set.\n * @property {!Object} [dimensions] Additional \"dimensions\" for tile requests.\n * This is an object with properties named like the advertised WMTS dimensions.\n * @property {string} [url]  A URL for the service.\n * For the RESTful request encoding, this is a URL\n * template.  For KVP encoding, it is normal URL. A `{?-?}` template pattern,\n * for example `subdomain{a-f}.domain.com`, may be used instead of defining\n * each one separately in the `urls` option.\n * @property {import(\"../Tile.js\").LoadFunction} [tileLoadFunction] Optional function to load a tile given a URL. The default is\n * ```js\n * function(imageTile, src) {\n *   imageTile.getImage().src = src;\n * };\n * ```\n * @property {Array<string>} [urls] An array of URLs.\n * Requests will be distributed among the URLs in this array.\n * @property {boolean} [wrapX=false] Whether to wrap the world horizontally.\n * @property {number} [transition] Duration of the opacity transition for rendering.\n * To disable the opacity transition, pass `transition: 0`.\n * @property {number|import(\"../array.js\").NearestDirectionFunction} [zDirection=0]\n * Choose whether to use tiles with a higher or lower zoom level when between integer\n * zoom levels. See {@link module:ol/tilegrid/TileGrid~TileGrid#getZForResolution}.\n */\n\n/**\n * @classdesc\n * Layer source for tile data from WMTS servers.\n * @api\n */\nclass WMTS extends TileImage {\n  /**\n   * @param {Options} options WMTS options.\n   */\n  constructor(options) {\n    // TODO: add support for TileMatrixLimits\n\n    const requestEncoding =\n      options.requestEncoding !== undefined ? options.requestEncoding : 'KVP';\n\n    // FIXME: should we create a default tileGrid?\n    // we could issue a getCapabilities xhr to retrieve missing configuration\n    const tileGrid = options.tileGrid;\n\n    let urls = options.urls;\n    if (urls === undefined && options.url !== undefined) {\n      urls = expandUrl(options.url);\n    }\n\n    super({\n      attributions: options.attributions,\n      attributionsCollapsible: options.attributionsCollapsible,\n      cacheSize: options.cacheSize,\n      crossOrigin: options.crossOrigin,\n      interpolate: options.interpolate,\n      projection: options.projection,\n      reprojectionErrorThreshold: options.reprojectionErrorThreshold,\n      tileClass: options.tileClass,\n      tileGrid: tileGrid,\n      tileLoadFunction: options.tileLoadFunction,\n      tilePixelRatio: options.tilePixelRatio,\n      urls: urls,\n      wrapX: options.wrapX !== undefined ? options.wrapX : false,\n      transition: options.transition,\n      zDirection: options.zDirection,\n    });\n\n    /**\n     * @private\n     * @type {string}\n     */\n    this.version_ = options.version !== undefined ? options.version : '1.0.0';\n\n    /**\n     * @private\n     * @type {string}\n     */\n    this.format_ = options.format !== undefined ? options.format : 'image/jpeg';\n\n    /**\n     * @private\n     * @type {!Object}\n     */\n    this.dimensions_ =\n      options.dimensions !== undefined ? options.dimensions : {};\n\n    /**\n     * @private\n     * @type {string}\n     */\n    this.layer_ = options.layer;\n\n    /**\n     * @private\n     * @type {string}\n     */\n    this.matrixSet_ = options.matrixSet;\n\n    /**\n     * @private\n     * @type {string}\n     */\n    this.style_ = options.style;\n\n    // FIXME: should we guess this requestEncoding from options.url(s)\n    //        structure? that would mean KVP only if a template is not provided.\n\n    /**\n     * @private\n     * @type {RequestEncoding}\n     */\n    this.requestEncoding_ = requestEncoding;\n\n    this.setKey(this.getKeyForDimensions_());\n\n    if (urls && urls.length > 0) {\n      this.tileUrlFunction = createFromTileUrlFunctions(\n        urls.map(this.createFromWMTSTemplate.bind(this))\n      );\n    }\n  }\n\n  /**\n   * Set the URLs to use for requests.\n   * URLs may contain OGC conform URL Template Variables: {TileMatrix}, {TileRow}, {TileCol}.\n   * @param {Array<string>} urls URLs.\n   */\n  setUrls(urls) {\n    this.urls = urls;\n    const key = urls.join('\\n');\n    this.setTileUrlFunction(\n      createFromTileUrlFunctions(\n        urls.map(this.createFromWMTSTemplate.bind(this))\n      ),\n      key\n    );\n  }\n\n  /**\n   * Get the dimensions, i.e. those passed to the constructor through the\n   * \"dimensions\" option, and possibly updated using the updateDimensions\n   * method.\n   * @return {!Object} Dimensions.\n   * @api\n   */\n  getDimensions() {\n    return this.dimensions_;\n  }\n\n  /**\n   * Return the image format of the WMTS source.\n   * @return {string} Format.\n   * @api\n   */\n  getFormat() {\n    return this.format_;\n  }\n\n  /**\n   * Return the layer of the WMTS source.\n   * @return {string} Layer.\n   * @api\n   */\n  getLayer() {\n    return this.layer_;\n  }\n\n  /**\n   * Return the matrix set of the WMTS source.\n   * @return {string} MatrixSet.\n   * @api\n   */\n  getMatrixSet() {\n    return this.matrixSet_;\n  }\n\n  /**\n   * Return the request encoding, either \"KVP\" or \"REST\".\n   * @return {RequestEncoding} Request encoding.\n   * @api\n   */\n  getRequestEncoding() {\n    return this.requestEncoding_;\n  }\n\n  /**\n   * Return the style of the WMTS source.\n   * @return {string} Style.\n   * @api\n   */\n  getStyle() {\n    return this.style_;\n  }\n\n  /**\n   * Return the version of the WMTS source.\n   * @return {string} Version.\n   * @api\n   */\n  getVersion() {\n    return this.version_;\n  }\n\n  /**\n   * @private\n   * @return {string} The key for the current dimensions.\n   */\n  getKeyForDimensions_() {\n    const res = this.urls ? this.urls.slice(0) : [];\n    for (const key in this.dimensions_) {\n      res.push(key + '-' + this.dimensions_[key]);\n    }\n    return res.join('/');\n  }\n\n  /**\n   * Update the dimensions.\n   * @param {Object} dimensions Dimensions.\n   * @api\n   */\n  updateDimensions(dimensions) {\n    Object.assign(this.dimensions_, dimensions);\n    this.setKey(this.getKeyForDimensions_());\n  }\n\n  /**\n   * @param {string} template Template.\n   * @return {import(\"../Tile.js\").UrlFunction} Tile URL function.\n   */\n  createFromWMTSTemplate(template) {\n    const requestEncoding = this.requestEncoding_;\n\n    // context property names are lower case to allow for a case insensitive\n    // replacement as some services use different naming conventions\n    const context = {\n      'layer': this.layer_,\n      'style': this.style_,\n      'tilematrixset': this.matrixSet_,\n    };\n\n    if (requestEncoding == 'KVP') {\n      Object.assign(context, {\n        'Service': 'WMTS',\n        'Request': 'GetTile',\n        'Version': this.version_,\n        'Format': this.format_,\n      });\n    }\n\n    // TODO: we may want to create our own appendParams function so that params\n    // order conforms to wmts spec guidance, and so that we can avoid to escape\n    // special template params\n\n    template =\n      requestEncoding == 'KVP'\n        ? appendParams(template, context)\n        : template.replace(/\\{(\\w+?)\\}/g, function (m, p) {\n            return p.toLowerCase() in context ? context[p.toLowerCase()] : m;\n          });\n\n    const tileGrid = /** @type {import(\"../tilegrid/WMTS.js\").default} */ (\n      this.tileGrid\n    );\n    const dimensions = this.dimensions_;\n\n    return (\n      /**\n       * @param {import(\"../tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n       * @param {number} pixelRatio Pixel ratio.\n       * @param {import(\"../proj/Projection.js\").default} projection Projection.\n       * @return {string|undefined} Tile URL.\n       */\n      function (tileCoord, pixelRatio, projection) {\n        if (!tileCoord) {\n          return undefined;\n        }\n        const localContext = {\n          'TileMatrix': tileGrid.getMatrixId(tileCoord[0]),\n          'TileCol': tileCoord[1],\n          'TileRow': tileCoord[2],\n        };\n        Object.assign(localContext, dimensions);\n        let url = template;\n        if (requestEncoding == 'KVP') {\n          url = appendParams(url, localContext);\n        } else {\n          url = url.replace(/\\{(\\w+?)\\}/g, function (m, p) {\n            return localContext[p];\n          });\n        }\n        return url;\n      }\n    );\n  }\n}\n\nexport default WMTS;\n\n/**\n * Generate source options from a capabilities object.\n * @param {Object} wmtsCap An object representing the capabilities document.\n * @param {!Object} config Configuration properties for the layer.  Defaults for\n *                  the layer will apply if not provided.\n *\n * Required config properties:\n *  - layer - {string} The layer identifier.\n *\n * Optional config properties:\n *  - matrixSet - {string} The matrix set identifier, required if there is\n *       more than one matrix set in the layer capabilities.\n *  - projection - {string} The desired CRS when no matrixSet is specified.\n *       eg: \"EPSG:3857\". If the desired projection is not available,\n *       an error is thrown.\n *  - requestEncoding - {string} url encoding format for the layer. Default is\n *       the first tile url format found in the GetCapabilities response.\n *  - style - {string} The name of the style\n *  - format - {string} Image format for the layer. Default is the first\n *       format returned in the GetCapabilities response.\n *  - crossOrigin - {string|null|undefined} Cross origin. Default is `undefined`.\n * @return {Options|null} WMTS source options object or `null` if the layer was not found.\n * @api\n */\nexport function optionsFromCapabilities(wmtsCap, config) {\n  const layers = wmtsCap['Contents']['Layer'];\n  const l = layers.find(function (elt) {\n    return elt['Identifier'] == config['layer'];\n  });\n  if (!l) {\n    return null;\n  }\n  const tileMatrixSets = wmtsCap['Contents']['TileMatrixSet'];\n  let idx;\n  if (l['TileMatrixSetLink'].length > 1) {\n    if ('projection' in config) {\n      idx = l['TileMatrixSetLink'].findIndex(function (elt) {\n        const tileMatrixSet = tileMatrixSets.find(function (el) {\n          return el['Identifier'] == elt['TileMatrixSet'];\n        });\n        const supportedCRS = tileMatrixSet['SupportedCRS'];\n        const proj1 = getProjection(supportedCRS);\n        const proj2 = getProjection(config['projection']);\n        if (proj1 && proj2) {\n          return equivalent(proj1, proj2);\n        }\n        return supportedCRS == config['projection'];\n      });\n    } else {\n      idx = l['TileMatrixSetLink'].findIndex(function (elt) {\n        return elt['TileMatrixSet'] == config['matrixSet'];\n      });\n    }\n  } else {\n    idx = 0;\n  }\n  if (idx < 0) {\n    idx = 0;\n  }\n  const matrixSet =\n    /** @type {string} */\n    (l['TileMatrixSetLink'][idx]['TileMatrixSet']);\n  const matrixLimits =\n    /** @type {Array<Object>} */\n    (l['TileMatrixSetLink'][idx]['TileMatrixSetLimits']);\n\n  let format = /** @type {string} */ (l['Format'][0]);\n  if ('format' in config) {\n    format = config['format'];\n  }\n  idx = l['Style'].findIndex(function (elt) {\n    if ('style' in config) {\n      return elt['Title'] == config['style'];\n    }\n    return elt['isDefault'];\n  });\n  if (idx < 0) {\n    idx = 0;\n  }\n  const style = /** @type {string} */ (l['Style'][idx]['Identifier']);\n\n  const dimensions = {};\n  if ('Dimension' in l) {\n    l['Dimension'].forEach(function (elt, index, array) {\n      const key = elt['Identifier'];\n      let value = elt['Default'];\n      if (value === undefined) {\n        value = elt['Value'][0];\n      }\n      dimensions[key] = value;\n    });\n  }\n\n  const matrixSets = wmtsCap['Contents']['TileMatrixSet'];\n  const matrixSetObj = matrixSets.find(function (elt) {\n    return elt['Identifier'] == matrixSet;\n  });\n\n  let projection;\n  const code = matrixSetObj['SupportedCRS'];\n  if (code) {\n    projection = getProjection(code);\n  }\n  if ('projection' in config) {\n    const projConfig = getProjection(config['projection']);\n    if (projConfig) {\n      if (!projection || equivalent(projConfig, projection)) {\n        projection = projConfig;\n      }\n    }\n  }\n\n  let wrapX = false;\n  const switchXY = projection.getAxisOrientation().substr(0, 2) == 'ne';\n\n  let matrix = matrixSetObj.TileMatrix[0];\n\n  // create default matrixLimit\n  let selectedMatrixLimit = {\n    MinTileCol: 0,\n    MinTileRow: 0,\n    // subtract one to end up at tile top left\n    MaxTileCol: matrix.MatrixWidth - 1,\n    MaxTileRow: matrix.MatrixHeight - 1,\n  };\n\n  //in case of matrix limits, use matrix limits to calculate extent\n  if (matrixLimits) {\n    selectedMatrixLimit = matrixLimits[matrixLimits.length - 1];\n    const m = matrixSetObj.TileMatrix.find(\n      (tileMatrixValue) =>\n        tileMatrixValue.Identifier === selectedMatrixLimit.TileMatrix ||\n        matrixSetObj.Identifier + ':' + tileMatrixValue.Identifier ===\n          selectedMatrixLimit.TileMatrix\n    );\n    if (m) {\n      matrix = m;\n    }\n  }\n\n  const resolution =\n    (matrix.ScaleDenominator * 0.00028) / projection.getMetersPerUnit(); // WMTS 1.0.0: standardized rendering pixel size\n  const origin = switchXY\n    ? [matrix.TopLeftCorner[1], matrix.TopLeftCorner[0]]\n    : matrix.TopLeftCorner;\n  const tileSpanX = matrix.TileWidth * resolution;\n  const tileSpanY = matrix.TileHeight * resolution;\n  let matrixSetExtent = matrixSetObj['BoundingBox'];\n  if (matrixSetExtent && switchXY) {\n    matrixSetExtent = [\n      matrixSetExtent[1],\n      matrixSetExtent[0],\n      matrixSetExtent[3],\n      matrixSetExtent[2],\n    ];\n  }\n  let extent = [\n    origin[0] + tileSpanX * selectedMatrixLimit.MinTileCol,\n    // add one to get proper bottom/right coordinate\n    origin[1] - tileSpanY * (1 + selectedMatrixLimit.MaxTileRow),\n    origin[0] + tileSpanX * (1 + selectedMatrixLimit.MaxTileCol),\n    origin[1] - tileSpanY * selectedMatrixLimit.MinTileRow,\n  ];\n\n  if (\n    matrixSetExtent !== undefined &&\n    !containsExtent(matrixSetExtent, extent)\n  ) {\n    const wgs84BoundingBox = l['WGS84BoundingBox'];\n    const wgs84ProjectionExtent = getProjection('EPSG:4326').getExtent();\n    extent = matrixSetExtent;\n    if (wgs84BoundingBox) {\n      wrapX =\n        wgs84BoundingBox[0] === wgs84ProjectionExtent[0] &&\n        wgs84BoundingBox[2] === wgs84ProjectionExtent[2];\n    } else {\n      const wgs84MatrixSetExtent = transformExtent(\n        matrixSetExtent,\n        matrixSetObj['SupportedCRS'],\n        'EPSG:4326'\n      );\n      // Ignore slight deviation from the correct x limits\n      wrapX =\n        wgs84MatrixSetExtent[0] - 1e-10 <= wgs84ProjectionExtent[0] &&\n        wgs84MatrixSetExtent[2] + 1e-10 >= wgs84ProjectionExtent[2];\n    }\n  }\n\n  const tileGrid = createFromCapabilitiesMatrixSet(\n    matrixSetObj,\n    extent,\n    matrixLimits\n  );\n\n  /** @type {!Array<string>} */\n  const urls = [];\n  let requestEncoding = config['requestEncoding'];\n  requestEncoding = requestEncoding !== undefined ? requestEncoding : '';\n\n  if (\n    'OperationsMetadata' in wmtsCap &&\n    'GetTile' in wmtsCap['OperationsMetadata']\n  ) {\n    const gets = wmtsCap['OperationsMetadata']['GetTile']['DCP']['HTTP']['Get'];\n\n    for (let i = 0, ii = gets.length; i < ii; ++i) {\n      if (gets[i]['Constraint']) {\n        const constraint = gets[i]['Constraint'].find(function (element) {\n          return element['name'] == 'GetEncoding';\n        });\n        const encodings = constraint['AllowedValues']['Value'];\n\n        if (requestEncoding === '') {\n          // requestEncoding not provided, use the first encoding from the list\n          requestEncoding = encodings[0];\n        }\n        if (requestEncoding === 'KVP') {\n          if (encodings.includes('KVP')) {\n            urls.push(/** @type {string} */ (gets[i]['href']));\n          }\n        } else {\n          break;\n        }\n      } else if (gets[i]['href']) {\n        requestEncoding = 'KVP';\n        urls.push(/** @type {string} */ (gets[i]['href']));\n      }\n    }\n  }\n  if (urls.length === 0) {\n    requestEncoding = 'REST';\n    l['ResourceURL'].forEach(function (element) {\n      if (element['resourceType'] === 'tile') {\n        format = element['format'];\n        urls.push(/** @type {string} */ (element['template']));\n      }\n    });\n  }\n\n  return {\n    urls: urls,\n    layer: config['layer'],\n    matrixSet: matrixSet,\n    format: format,\n    projection: projection,\n    requestEncoding: requestEncoding,\n    tileGrid: tileGrid,\n    style: style,\n    dimensions: dimensions,\n    wrapX: wrapX,\n    crossOrigin: config['crossOrigin'],\n  };\n}\n","/**\n * @module ol/webgl\n */\n\nimport {SAFARI_BUG_237906} from './has.js';\n\n/**\n * Constants taken from goog.webgl\n */\n\n/**\n * Used by {@link module:ol/webgl/Helper~WebGLHelper} for buffers containing vertices data, such as\n * position, color, texture coordinate, etc. These vertices are then referenced by an index buffer\n * to be drawn on screen (see {@link module:ol/webgl.ELEMENT_ARRAY_BUFFER}).\n * @const\n * @type {number}\n * @api\n */\nexport const ARRAY_BUFFER = 0x8892;\n\n/**\n * Used by {@link module:ol/webgl/Helper~WebGLHelper} for buffers containing indices data.\n * Index buffers are essentially lists of references to vertices defined in a vertex buffer\n * (see {@link module:ol/webgl.ARRAY_BUFFER}), and define the primitives (triangles) to be drawn.\n * @const\n * @type {number}\n * @api\n */\nexport const ELEMENT_ARRAY_BUFFER = 0x8893;\n\n/**\n * Used by {link module:ol/webgl/Buffer~WebGLArrayBuffer}.\n * @const\n * @type {number}\n * @api\n */\nexport const STREAM_DRAW = 0x88e0;\n\n/**\n * Used by {link module:ol/webgl/Buffer~WebGLArrayBuffer}.\n * @const\n * @type {number}\n * @api\n */\nexport const STATIC_DRAW = 0x88e4;\n\n/**\n * Used by {link module:ol/webgl/Buffer~WebGLArrayBuffer}.\n * @const\n * @type {number}\n * @api\n */\nexport const DYNAMIC_DRAW = 0x88e8;\n\n/**\n * @const\n * @type {number}\n */\nexport const UNSIGNED_BYTE = 0x1401;\n\n/**\n * @const\n * @type {number}\n */\nexport const UNSIGNED_SHORT = 0x1403;\n\n/**\n * @const\n * @type {number}\n */\nexport const UNSIGNED_INT = 0x1405;\n\n/**\n * @const\n * @type {number}\n */\nexport const FLOAT = 0x1406;\n\n/** end of goog.webgl constants\n */\n\n/**\n * @const\n * @type {Array<string>}\n */\nconst CONTEXT_IDS = ['experimental-webgl', 'webgl', 'webkit-3d', 'moz-webgl'];\n\n/**\n * @param {HTMLCanvasElement} canvas Canvas.\n * @param {Object} [attributes] Attributes.\n * @return {WebGLRenderingContext} WebGL rendering context.\n */\nexport function getContext(canvas, attributes) {\n  attributes = Object.assign(\n    {\n      preserveDrawingBuffer: true,\n      antialias: SAFARI_BUG_237906 ? false : true, // https://bugs.webkit.org/show_bug.cgi?id=237906\n    },\n    attributes\n  );\n  const ii = CONTEXT_IDS.length;\n  for (let i = 0; i < ii; ++i) {\n    try {\n      const context = canvas.getContext(CONTEXT_IDS[i], attributes);\n      if (context) {\n        return /** @type {!WebGLRenderingContext} */ (context);\n      }\n    } catch (e) {\n      // pass\n    }\n  }\n  return null;\n}\n\n/**\n * @type {Array<string>}\n */\nlet supportedExtensions;\n\n/**\n * @return {Array<string>} List of supported WebGL extensions.\n */\nexport function getSupportedExtensions() {\n  if (!supportedExtensions) {\n    const canvas = document.createElement('canvas');\n    const gl = getContext(canvas);\n    if (gl) {\n      supportedExtensions = gl.getSupportedExtensions();\n    }\n  }\n  return supportedExtensions;\n}\n","/**\n * @module ol/xml\n */\nimport {extend} from './array.js';\n\n/**\n * When using {@link module:ol/xml.makeChildAppender} or\n * {@link module:ol/xml.makeSimpleNodeFactory}, the top `objectStack` item needs\n * to have this structure.\n * @typedef {Object} NodeStackItem\n * @property {Element} node Node.\n */\n\n/**\n * @typedef {function(Element, Array<*>): void} Parser\n */\n\n/**\n * @typedef {function(Element, *, Array<*>): void} Serializer\n */\n\n/**\n * @type {string}\n */\nexport const XML_SCHEMA_INSTANCE_URI =\n  'http://www.w3.org/2001/XMLSchema-instance';\n\n/**\n * @param {string} namespaceURI Namespace URI.\n * @param {string} qualifiedName Qualified name.\n * @return {Element} Node.\n */\nexport function createElementNS(namespaceURI, qualifiedName) {\n  return getDocument().createElementNS(namespaceURI, qualifiedName);\n}\n\n/**\n * Recursively grab all text content of child nodes into a single string.\n * @param {Node} node Node.\n * @param {boolean} normalizeWhitespace Normalize whitespace: remove all line\n * breaks.\n * @return {string} All text content.\n * @api\n */\nexport function getAllTextContent(node, normalizeWhitespace) {\n  return getAllTextContent_(node, normalizeWhitespace, []).join('');\n}\n\n/**\n * Recursively grab all text content of child nodes into a single string.\n * @param {Node} node Node.\n * @param {boolean} normalizeWhitespace Normalize whitespace: remove all line\n * breaks.\n * @param {Array<string>} accumulator Accumulator.\n * @private\n * @return {Array<string>} Accumulator.\n */\nexport function getAllTextContent_(node, normalizeWhitespace, accumulator) {\n  if (\n    node.nodeType == Node.CDATA_SECTION_NODE ||\n    node.nodeType == Node.TEXT_NODE\n  ) {\n    if (normalizeWhitespace) {\n      accumulator.push(String(node.nodeValue).replace(/(\\r\\n|\\r|\\n)/g, ''));\n    } else {\n      accumulator.push(node.nodeValue);\n    }\n  } else {\n    let n;\n    for (n = node.firstChild; n; n = n.nextSibling) {\n      getAllTextContent_(n, normalizeWhitespace, accumulator);\n    }\n  }\n  return accumulator;\n}\n\n/**\n * @param {Object} object Object.\n * @return {boolean} Is a document.\n */\nexport function isDocument(object) {\n  return 'documentElement' in object;\n}\n\n/**\n * @param {Element} node Node.\n * @param {?string} namespaceURI Namespace URI.\n * @param {string} name Attribute name.\n * @return {string} Value\n */\nexport function getAttributeNS(node, namespaceURI, name) {\n  return node.getAttributeNS(namespaceURI, name) || '';\n}\n\n/**\n * Parse an XML string to an XML Document.\n * @param {string} xml XML.\n * @return {Document} Document.\n * @api\n */\nexport function parse(xml) {\n  return new DOMParser().parseFromString(xml, 'application/xml');\n}\n\n/**\n * Make an array extender function for extending the array at the top of the\n * object stack.\n * @param {function(this: T, Node, Array<*>): (Array<*>|undefined)} valueReader Value reader.\n * @param {T} [thisArg] The object to use as `this` in `valueReader`.\n * @return {Parser} Parser.\n * @template T\n */\nexport function makeArrayExtender(valueReader, thisArg) {\n  return (\n    /**\n     * @param {Node} node Node.\n     * @param {Array<*>} objectStack Object stack.\n     */\n    function (node, objectStack) {\n      const value = valueReader.call(\n        thisArg !== undefined ? thisArg : this,\n        node,\n        objectStack\n      );\n      if (value !== undefined) {\n        const array = /** @type {Array<*>} */ (\n          objectStack[objectStack.length - 1]\n        );\n        extend(array, value);\n      }\n    }\n  );\n}\n\n/**\n * Make an array pusher function for pushing to the array at the top of the\n * object stack.\n * @param {function(this: T, Element, Array<*>): *} valueReader Value reader.\n * @param {T} [thisArg] The object to use as `this` in `valueReader`.\n * @return {Parser} Parser.\n * @template T\n */\nexport function makeArrayPusher(valueReader, thisArg) {\n  return (\n    /**\n     * @param {Element} node Node.\n     * @param {Array<*>} objectStack Object stack.\n     */\n    function (node, objectStack) {\n      const value = valueReader.call(\n        thisArg !== undefined ? thisArg : this,\n        node,\n        objectStack\n      );\n      if (value !== undefined) {\n        const array = /** @type {Array<*>} */ (\n          objectStack[objectStack.length - 1]\n        );\n        array.push(value);\n      }\n    }\n  );\n}\n\n/**\n * Make an object stack replacer function for replacing the object at the\n * top of the stack.\n * @param {function(this: T, Node, Array<*>): *} valueReader Value reader.\n * @param {T} [thisArg] The object to use as `this` in `valueReader`.\n * @return {Parser} Parser.\n * @template T\n */\nexport function makeReplacer(valueReader, thisArg) {\n  return (\n    /**\n     * @param {Node} node Node.\n     * @param {Array<*>} objectStack Object stack.\n     */\n    function (node, objectStack) {\n      const value = valueReader.call(\n        thisArg !== undefined ? thisArg : this,\n        node,\n        objectStack\n      );\n      if (value !== undefined) {\n        objectStack[objectStack.length - 1] = value;\n      }\n    }\n  );\n}\n\n/**\n * Make an object property pusher function for adding a property to the\n * object at the top of the stack.\n * @param {function(this: T, Element, Array<*>): *} valueReader Value reader.\n * @param {string} [property] Property.\n * @param {T} [thisArg] The object to use as `this` in `valueReader`.\n * @return {Parser} Parser.\n * @template T\n */\nexport function makeObjectPropertyPusher(valueReader, property, thisArg) {\n  return (\n    /**\n     * @param {Element} node Node.\n     * @param {Array<*>} objectStack Object stack.\n     */\n    function (node, objectStack) {\n      const value = valueReader.call(\n        thisArg !== undefined ? thisArg : this,\n        node,\n        objectStack\n      );\n      if (value !== undefined) {\n        const object = /** @type {!Object} */ (\n          objectStack[objectStack.length - 1]\n        );\n        const name = property !== undefined ? property : node.localName;\n        let array;\n        if (name in object) {\n          array = object[name];\n        } else {\n          array = [];\n          object[name] = array;\n        }\n        array.push(value);\n      }\n    }\n  );\n}\n\n/**\n * Make an object property setter function.\n * @param {function(this: T, Element, Array<*>): *} valueReader Value reader.\n * @param {string} [property] Property.\n * @param {T} [thisArg] The object to use as `this` in `valueReader`.\n * @return {Parser} Parser.\n * @template T\n */\nexport function makeObjectPropertySetter(valueReader, property, thisArg) {\n  return (\n    /**\n     * @param {Element} node Node.\n     * @param {Array<*>} objectStack Object stack.\n     */\n    function (node, objectStack) {\n      const value = valueReader.call(\n        thisArg !== undefined ? thisArg : this,\n        node,\n        objectStack\n      );\n      if (value !== undefined) {\n        const object = /** @type {!Object} */ (\n          objectStack[objectStack.length - 1]\n        );\n        const name = property !== undefined ? property : node.localName;\n        object[name] = value;\n      }\n    }\n  );\n}\n\n/**\n * Create a serializer that appends nodes written by its `nodeWriter` to its\n * designated parent. The parent is the `node` of the\n * {@link module:ol/xml~NodeStackItem} at the top of the `objectStack`.\n * @param {function(this: T, Node, V, Array<*>): void} nodeWriter Node writer.\n * @param {T} [thisArg] The object to use as `this` in `nodeWriter`.\n * @return {Serializer} Serializer.\n * @template T, V\n */\nexport function makeChildAppender(nodeWriter, thisArg) {\n  return function (node, value, objectStack) {\n    nodeWriter.call(\n      thisArg !== undefined ? thisArg : this,\n      node,\n      value,\n      objectStack\n    );\n    const parent = /** @type {NodeStackItem} */ (\n      objectStack[objectStack.length - 1]\n    );\n    const parentNode = parent.node;\n    parentNode.appendChild(node);\n  };\n}\n\n/**\n * Create a serializer that calls the provided `nodeWriter` from\n * {@link module:ol/xml.serialize}. This can be used by the parent writer to have the\n * `nodeWriter` called with an array of values when the `nodeWriter` was\n * designed to serialize a single item. An example would be a LineString\n * geometry writer, which could be reused for writing MultiLineString\n * geometries.\n * @param {function(this: T, Element, V, Array<*>): void} nodeWriter Node writer.\n * @param {T} [thisArg] The object to use as `this` in `nodeWriter`.\n * @return {Serializer} Serializer.\n * @template T, V\n */\nexport function makeArraySerializer(nodeWriter, thisArg) {\n  let serializersNS, nodeFactory;\n  return function (node, value, objectStack) {\n    if (serializersNS === undefined) {\n      serializersNS = {};\n      const serializers = {};\n      serializers[node.localName] = nodeWriter;\n      serializersNS[node.namespaceURI] = serializers;\n      nodeFactory = makeSimpleNodeFactory(node.localName);\n    }\n    serialize(serializersNS, nodeFactory, value, objectStack);\n  };\n}\n\n/**\n * Create a node factory which can use the `keys` passed to\n * {@link module:ol/xml.serialize} or {@link module:ol/xml.pushSerializeAndPop} as node names,\n * or a fixed node name. The namespace of the created nodes can either be fixed,\n * or the parent namespace will be used.\n * @param {string} [fixedNodeName] Fixed node name which will be used for all\n *     created nodes. If not provided, the 3rd argument to the resulting node\n *     factory needs to be provided and will be the nodeName.\n * @param {string} [fixedNamespaceURI] Fixed namespace URI which will be used for\n *     all created nodes. If not provided, the namespace of the parent node will\n *     be used.\n * @return {function(*, Array<*>, string=): (Node|undefined)} Node factory.\n */\nexport function makeSimpleNodeFactory(fixedNodeName, fixedNamespaceURI) {\n  return (\n    /**\n     * @param {*} value Value.\n     * @param {Array<*>} objectStack Object stack.\n     * @param {string} [newNodeName] Node name.\n     * @return {Node} Node.\n     */\n    function (value, objectStack, newNodeName) {\n      const context = /** @type {NodeStackItem} */ (\n        objectStack[objectStack.length - 1]\n      );\n      const node = context.node;\n      let nodeName = fixedNodeName;\n      if (nodeName === undefined) {\n        nodeName = newNodeName;\n      }\n\n      const namespaceURI =\n        fixedNamespaceURI !== undefined ? fixedNamespaceURI : node.namespaceURI;\n      return createElementNS(namespaceURI, /** @type {string} */ (nodeName));\n    }\n  );\n}\n\n/**\n * A node factory that creates a node using the parent's `namespaceURI` and the\n * `nodeName` passed by {@link module:ol/xml.serialize} or\n * {@link module:ol/xml.pushSerializeAndPop} to the node factory.\n * @const\n * @type {function(*, Array<*>, string=): (Node|undefined)}\n */\nexport const OBJECT_PROPERTY_NODE_FACTORY = makeSimpleNodeFactory();\n\n/**\n * Create an array of `values` to be used with {@link module:ol/xml.serialize} or\n * {@link module:ol/xml.pushSerializeAndPop}, where `orderedKeys` has to be provided as\n * `key` argument.\n * @param {Object<string, *>} object Key-value pairs for the sequence. Keys can\n *     be a subset of the `orderedKeys`.\n * @param {Array<string>} orderedKeys Keys in the order of the sequence.\n * @return {Array<*>} Values in the order of the sequence. The resulting array\n *     has the same length as the `orderedKeys` array. Values that are not\n *     present in `object` will be `undefined` in the resulting array.\n */\nexport function makeSequence(object, orderedKeys) {\n  const length = orderedKeys.length;\n  const sequence = new Array(length);\n  for (let i = 0; i < length; ++i) {\n    sequence[i] = object[orderedKeys[i]];\n  }\n  return sequence;\n}\n\n/**\n * Create a namespaced structure, using the same values for each namespace.\n * This can be used as a starting point for versioned parsers, when only a few\n * values are version specific.\n * @param {Array<string>} namespaceURIs Namespace URIs.\n * @param {T} structure Structure.\n * @param {Object<string, T>} [structureNS] Namespaced structure to add to.\n * @return {Object<string, T>} Namespaced structure.\n * @template T\n */\nexport function makeStructureNS(namespaceURIs, structure, structureNS) {\n  structureNS = structureNS !== undefined ? structureNS : {};\n  let i, ii;\n  for (i = 0, ii = namespaceURIs.length; i < ii; ++i) {\n    structureNS[namespaceURIs[i]] = structure;\n  }\n  return structureNS;\n}\n\n/**\n * Parse a node using the parsers and object stack.\n * @param {Object<string, Object<string, Parser>>} parsersNS\n *     Parsers by namespace.\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @param {*} [thisArg] The object to use as `this`.\n */\nexport function parseNode(parsersNS, node, objectStack, thisArg) {\n  let n;\n  for (n = node.firstElementChild; n; n = n.nextElementSibling) {\n    const parsers = parsersNS[n.namespaceURI];\n    if (parsers !== undefined) {\n      const parser = parsers[n.localName];\n      if (parser !== undefined) {\n        parser.call(thisArg, n, objectStack);\n      }\n    }\n  }\n}\n\n/**\n * Push an object on top of the stack, parse and return the popped object.\n * @param {T} object Object.\n * @param {Object<string, Object<string, Parser>>} parsersNS\n *     Parsers by namespace.\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @param {*} [thisArg] The object to use as `this`.\n * @return {T} Object.\n * @template T\n */\nexport function pushParseAndPop(object, parsersNS, node, objectStack, thisArg) {\n  objectStack.push(object);\n  parseNode(parsersNS, node, objectStack, thisArg);\n  return /** @type {T} */ (objectStack.pop());\n}\n\n/**\n * Walk through an array of `values` and call a serializer for each value.\n * @param {Object<string, Object<string, Serializer>>} serializersNS\n *     Namespaced serializers.\n * @param {function(this: T, *, Array<*>, (string|undefined)): (Node|undefined)} nodeFactory\n *     Node factory. The `nodeFactory` creates the node whose namespace and name\n *     will be used to choose a node writer from `serializersNS`. This\n *     separation allows us to decide what kind of node to create, depending on\n *     the value we want to serialize. An example for this would be different\n *     geometry writers based on the geometry type.\n * @param {Array<*>} values Values to serialize. An example would be an array\n *     of {@link module:ol/Feature~Feature} instances.\n * @param {Array<*>} objectStack Node stack.\n * @param {Array<string>} [keys] Keys of the `values`. Will be passed to the\n *     `nodeFactory`. This is used for serializing object literals where the\n *     node name relates to the property key. The array length of `keys` has\n *     to match the length of `values`. For serializing a sequence, `keys`\n *     determines the order of the sequence.\n * @param {T} [thisArg] The object to use as `this` for the node factory and\n *     serializers.\n * @template T\n */\nexport function serialize(\n  serializersNS,\n  nodeFactory,\n  values,\n  objectStack,\n  keys,\n  thisArg\n) {\n  const length = (keys !== undefined ? keys : values).length;\n  let value, node;\n  for (let i = 0; i < length; ++i) {\n    value = values[i];\n    if (value !== undefined) {\n      node = nodeFactory.call(\n        thisArg !== undefined ? thisArg : this,\n        value,\n        objectStack,\n        keys !== undefined ? keys[i] : undefined\n      );\n      if (node !== undefined) {\n        serializersNS[node.namespaceURI][node.localName].call(\n          thisArg,\n          node,\n          value,\n          objectStack\n        );\n      }\n    }\n  }\n}\n\n/**\n * @param {O} object Object.\n * @param {Object<string, Object<string, Serializer>>} serializersNS\n *     Namespaced serializers.\n * @param {function(this: T, *, Array<*>, (string|undefined)): (Node|undefined)} nodeFactory\n *     Node factory. The `nodeFactory` creates the node whose namespace and name\n *     will be used to choose a node writer from `serializersNS`. This\n *     separation allows us to decide what kind of node to create, depending on\n *     the value we want to serialize. An example for this would be different\n *     geometry writers based on the geometry type.\n * @param {Array<*>} values Values to serialize. An example would be an array\n *     of {@link module:ol/Feature~Feature} instances.\n * @param {Array<*>} objectStack Node stack.\n * @param {Array<string>} [keys] Keys of the `values`. Will be passed to the\n *     `nodeFactory`. This is used for serializing object literals where the\n *     node name relates to the property key. The array length of `keys` has\n *     to match the length of `values`. For serializing a sequence, `keys`\n *     determines the order of the sequence.\n * @param {T} [thisArg] The object to use as `this` for the node factory and\n *     serializers.\n * @return {O|undefined} Object.\n * @template O, T\n */\nexport function pushSerializeAndPop(\n  object,\n  serializersNS,\n  nodeFactory,\n  values,\n  objectStack,\n  keys,\n  thisArg\n) {\n  objectStack.push(object);\n  serialize(serializersNS, nodeFactory, values, objectStack, keys, thisArg);\n  return /** @type {O|undefined} */ (objectStack.pop());\n}\n\nlet xmlSerializer_ = undefined;\n\n/**\n * Register a XMLSerializer. Can be used  to inject a XMLSerializer\n * where there is no globally available implementation.\n *\n * @param {XMLSerializer} xmlSerializer A XMLSerializer.\n * @api\n */\nexport function registerXMLSerializer(xmlSerializer) {\n  xmlSerializer_ = xmlSerializer;\n}\n\n/**\n * @return {XMLSerializer} The XMLSerializer.\n */\nexport function getXMLSerializer() {\n  if (xmlSerializer_ === undefined && typeof XMLSerializer !== 'undefined') {\n    xmlSerializer_ = new XMLSerializer();\n  }\n  return xmlSerializer_;\n}\n\nlet document_ = undefined;\n\n/**\n * Register a Document to use when creating nodes for XML serializations. Can be used\n * to inject a Document where there is no globally available implementation.\n *\n * @param {Document} document A Document.\n * @api\n */\nexport function registerDocument(document) {\n  document_ = document;\n}\n\n/**\n * Get a document that should be used when creating nodes for XML serializations.\n * @return {Document} The document.\n */\nexport function getDocument() {\n  if (document_ === undefined && typeof document !== 'undefined') {\n    document_ = document.implementation.createDocument('', '', null);\n  }\n  return document_;\n}\n","/**\n * @module ol/webgl/BaseTileRepresentation\n */\n\nimport EventTarget from '../events/Target.js';\nimport EventType from '../events/EventType.js';\nimport ImageTile from '../ImageTile.js';\nimport TileState from '../TileState.js';\nimport {abstract} from '../util.js';\n\n/**\n * @typedef {import(\"../Tile.js\").default} BaseTileType\n */\n\n/**\n * @template {BaseTileType} TileType\n * @typedef {Object} TileRepresentationOptions\n * @property {TileType} tile The tile.\n * @property {import(\"../tilegrid/TileGrid.js\").default} grid Tile grid.\n * @property {import(\"../webgl/Helper.js\").default} helper WebGL helper.\n * @property {number} [gutter=0] The size in pixels of the gutter around image tiles to ignore.\n */\n\n/**\n * @classdesc\n * Base class for representing a tile in a webgl context\n * @template {import(\"../Tile.js\").default} TileType\n * @abstract\n */\nclass BaseTileRepresentation extends EventTarget {\n  /**\n   * @param {TileRepresentationOptions<TileType>} options The tile representation options.\n   */\n  constructor(options) {\n    super();\n\n    /**\n     * @type {TileType}\n     */\n    this.tile;\n    this.handleTileChange_ = this.handleTileChange_.bind(this);\n\n    /**\n     * @type {number}\n     * @protected\n     */\n    this.gutter_ = options.gutter || 0;\n\n    /**\n     * @type {import(\"../webgl/Helper.js\").default}\n     * @protected\n     */\n    this.helper_ = options.helper;\n\n    this.loaded = false;\n    this.ready = false;\n  }\n\n  /**\n   * @param {TileType} tile Tile.\n   */\n  setTile(tile) {\n    if (tile !== this.tile) {\n      if (this.tile) {\n        this.tile.removeEventListener(EventType.CHANGE, this.handleTileChange_);\n      }\n      this.tile = tile;\n      this.loaded = tile.getState() === TileState.LOADED;\n      if (this.loaded) {\n        this.uploadTile();\n      } else {\n        if (tile instanceof ImageTile) {\n          const image = tile.getImage();\n          if (image instanceof Image && !image.crossOrigin) {\n            image.crossOrigin = 'anonymous';\n          }\n        }\n        tile.addEventListener(EventType.CHANGE, this.handleTileChange_);\n      }\n    }\n  }\n\n  /**\n   * @abstract\n   * @protected\n   */\n  uploadTile() {\n    abstract();\n  }\n\n  setReady() {\n    this.ready = true;\n    this.dispatchEvent(EventType.CHANGE);\n  }\n\n  handleTileChange_() {\n    if (this.tile.getState() === TileState.LOADED) {\n      this.loaded = true;\n      this.uploadTile();\n    }\n  }\n\n  disposeInternal() {\n    this.tile.removeEventListener(EventType.CHANGE, this.handleTileChange_);\n  }\n}\n\nexport default BaseTileRepresentation;\n","/**\n * @module ol/webgl/Buffer\n */\nimport {\n  ARRAY_BUFFER,\n  DYNAMIC_DRAW,\n  ELEMENT_ARRAY_BUFFER,\n  STATIC_DRAW,\n  STREAM_DRAW,\n} from '../webgl.js';\nimport {assert} from '../asserts.js';\n\n/**\n * Used to describe the intended usage for the data: `STATIC_DRAW`, `STREAM_DRAW`\n * or `DYNAMIC_DRAW`.\n * @enum {number}\n */\nexport const BufferUsage = {\n  STATIC_DRAW: STATIC_DRAW,\n  STREAM_DRAW: STREAM_DRAW,\n  DYNAMIC_DRAW: DYNAMIC_DRAW,\n};\n\n/**\n * @classdesc\n * Object used to store an array of data as well as usage information for that data.\n * Stores typed arrays internally, either Float32Array or Uint16/32Array depending on\n * the buffer type (ARRAY_BUFFER or ELEMENT_ARRAY_BUFFER) and available extensions.\n *\n * To populate the array, you can either use:\n * * A size using `#ofSize(buffer)`\n * * An `ArrayBuffer` object using `#fromArrayBuffer(buffer)`\n * * A plain array using `#fromArray(array)`\n *\n * Note:\n * See the documentation of [WebGLRenderingContext.bufferData](https://developer.mozilla.org/en-US/docs/Web/API/WebGLRenderingContext/bufferData)\n * for more info on buffer usage.\n * @api\n */\nclass WebGLArrayBuffer {\n  /**\n   * @param {number} type Buffer type, either ARRAY_BUFFER or ELEMENT_ARRAY_BUFFER.\n   * @param {number} [usage] Intended usage, either `STATIC_DRAW`, `STREAM_DRAW` or `DYNAMIC_DRAW`.\n   * Default is `DYNAMIC_DRAW`.\n   */\n  constructor(type, usage) {\n    /**\n     * @private\n     * @type {Float32Array|Uint32Array}\n     */\n    this.array = null;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.type = type;\n\n    assert(type === ARRAY_BUFFER || type === ELEMENT_ARRAY_BUFFER, 62);\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.usage = usage !== undefined ? usage : BufferUsage.STATIC_DRAW;\n  }\n\n  /**\n   * Populates the buffer with an array of the given size (all values will be zeroes).\n   * @param {number} size Array size\n   * @return {WebGLArrayBuffer} This\n   */\n  ofSize(size) {\n    this.array = new (getArrayClassForType(this.type))(size);\n    return this;\n  }\n\n  /**\n   * Populates the buffer with an array of the given size.\n   * @param {Array<number>} array Numerical array\n   * @return {WebGLArrayBuffer} This\n   */\n  fromArray(array) {\n    this.array = getArrayClassForType(this.type).from(array);\n    return this;\n  }\n\n  /**\n   * Populates the buffer with a raw binary array buffer.\n   * @param {ArrayBuffer} buffer Raw binary buffer to populate the array with. Note that this buffer must have been\n   * initialized for the same typed array class.\n   * @return {WebGLArrayBuffer} This\n   */\n  fromArrayBuffer(buffer) {\n    this.array = new (getArrayClassForType(this.type))(buffer);\n    return this;\n  }\n\n  /**\n   * @return {number} Buffer type.\n   */\n  getType() {\n    return this.type;\n  }\n\n  /**\n   * Will return null if the buffer was not initialized\n   * @return {Float32Array|Uint32Array} Array.\n   */\n  getArray() {\n    return this.array;\n  }\n\n  /**\n   * @return {number} Usage.\n   */\n  getUsage() {\n    return this.usage;\n  }\n\n  /**\n   * Will return 0 if the buffer is not initialized\n   * @return {number} Array size\n   */\n  getSize() {\n    return this.array ? this.array.length : 0;\n  }\n}\n\n/**\n * Returns a typed array constructor based on the given buffer type\n * @param {number} type Buffer type, either ARRAY_BUFFER or ELEMENT_ARRAY_BUFFER.\n * @return {Float32ArrayConstructor|Uint32ArrayConstructor} The typed array class to use for this buffer.\n */\nexport function getArrayClassForType(type) {\n  switch (type) {\n    case ARRAY_BUFFER:\n      return Float32Array;\n    case ELEMENT_ARRAY_BUFFER:\n      return Uint32Array;\n    default:\n      return Float32Array;\n  }\n}\n\nexport default WebGLArrayBuffer;\n","/**\n * @module ol/webgl/ContextEventType\n */\n\n/**\n * @enum {string}\n */\nexport default {\n  LOST: 'webglcontextlost',\n  RESTORED: 'webglcontextrestored',\n};\n","/**\n * @module ol/webgl/PostProcessingPass\n */\n\nimport {getUid} from '../util.js';\n\nconst DEFAULT_VERTEX_SHADER = `\n  precision mediump float;\n  \n  attribute vec2 a_position;\n  varying vec2 v_texCoord;\n  varying vec2 v_screenCoord;\n  \n  uniform vec2 u_screenSize;\n   \n  void main() {\n    v_texCoord = a_position * 0.5 + 0.5;\n    v_screenCoord = v_texCoord * u_screenSize;\n    gl_Position = vec4(a_position, 0.0, 1.0);\n  }\n`;\n\nconst DEFAULT_FRAGMENT_SHADER = `\n  precision mediump float;\n   \n  uniform sampler2D u_image;\n  uniform float u_opacity;\n   \n  varying vec2 v_texCoord;\n   \n  void main() {\n    gl_FragColor = texture2D(u_image, v_texCoord) * u_opacity;\n  }\n`;\n\n/**\n * @typedef {Object} Options\n * @property {WebGLRenderingContext} webGlContext WebGL context; mandatory.\n * @property {number} [scaleRatio] Scale ratio; if < 1, the post process will render to a texture smaller than\n * the main canvas that will then be sampled up (useful for saving resource on blur steps).\n * @property {string} [vertexShader] Vertex shader source\n * @property {string} [fragmentShader] Fragment shader source\n * @property {Object<string,import(\"./Helper\").UniformValue>} [uniforms] Uniform definitions for the post process step\n */\n\n/**\n * @typedef {Object} UniformInternalDescription\n * @property {import(\"./Helper\").UniformValue} value Value\n * @property {WebGLUniformLocation} location Location\n * @property {WebGLTexture} [texture] Texture\n * @private\n */\n\n/**\n * @classdesc\n * This class is used to define Post Processing passes with custom shaders and uniforms.\n * This is used internally by {@link module:ol/webgl/Helper~WebGLHelper}.\n *\n * Please note that the final output on the DOM canvas is expected to have premultiplied alpha, which means that\n * a pixel which is 100% red with an opacity of 50% must have a color of (r=0.5, g=0, b=0, a=0.5).\n * Failing to provide pixel colors with premultiplied alpha will result in render anomalies.\n *\n * The default post-processing pass does *not* multiply color values with alpha value, it expects color values to be\n * premultiplied.\n *\n * Default shaders are shown hereafter:\n *\n * * Vertex shader:\n *\n *   ```\n *   precision mediump float;\n *\n *   attribute vec2 a_position;\n *   varying vec2 v_texCoord;\n *   varying vec2 v_screenCoord;\n *\n *   uniform vec2 u_screenSize;\n *\n *   void main() {\n *     v_texCoord = a_position * 0.5 + 0.5;\n *     v_screenCoord = v_texCoord * u_screenSize;\n *     gl_Position = vec4(a_position, 0.0, 1.0);\n *   }\n *   ```\n *\n * * Fragment shader:\n *\n *   ```\n *   precision mediump float;\n *\n *   uniform sampler2D u_image;\n *   uniform float u_opacity;\n *\n *   varying vec2 v_texCoord;\n *\n *   void main() {\n *     gl_FragColor = texture2D(u_image, v_texCoord) * u_opacity;\n *   }\n *   ```\n *\n * @api\n */\nclass WebGLPostProcessingPass {\n  /**\n   * @param {Options} options Options.\n   */\n  constructor(options) {\n    this.gl_ = options.webGlContext;\n    const gl = this.gl_;\n\n    this.scaleRatio_ = options.scaleRatio || 1;\n\n    this.renderTargetTexture_ = gl.createTexture();\n    this.renderTargetTextureSize_ = null;\n\n    this.frameBuffer_ = gl.createFramebuffer();\n\n    // compile the program for the frame buffer\n    // TODO: make compilation errors show up\n    const vertexShader = gl.createShader(gl.VERTEX_SHADER);\n    gl.shaderSource(\n      vertexShader,\n      options.vertexShader || DEFAULT_VERTEX_SHADER\n    );\n    gl.compileShader(vertexShader);\n    const fragmentShader = gl.createShader(gl.FRAGMENT_SHADER);\n    gl.shaderSource(\n      fragmentShader,\n      options.fragmentShader || DEFAULT_FRAGMENT_SHADER\n    );\n    gl.compileShader(fragmentShader);\n    this.renderTargetProgram_ = gl.createProgram();\n    gl.attachShader(this.renderTargetProgram_, vertexShader);\n    gl.attachShader(this.renderTargetProgram_, fragmentShader);\n    gl.linkProgram(this.renderTargetProgram_);\n\n    // bind the vertices buffer for the frame buffer\n    this.renderTargetVerticesBuffer_ = gl.createBuffer();\n    const verticesArray = [-1, -1, 1, -1, -1, 1, 1, -1, 1, 1, -1, 1];\n    gl.bindBuffer(gl.ARRAY_BUFFER, this.renderTargetVerticesBuffer_);\n    gl.bufferData(\n      gl.ARRAY_BUFFER,\n      new Float32Array(verticesArray),\n      gl.STATIC_DRAW\n    );\n\n    this.renderTargetAttribLocation_ = gl.getAttribLocation(\n      this.renderTargetProgram_,\n      'a_position'\n    );\n    this.renderTargetUniformLocation_ = gl.getUniformLocation(\n      this.renderTargetProgram_,\n      'u_screenSize'\n    );\n    this.renderTargetOpacityLocation_ = gl.getUniformLocation(\n      this.renderTargetProgram_,\n      'u_opacity'\n    );\n    this.renderTargetTextureLocation_ = gl.getUniformLocation(\n      this.renderTargetProgram_,\n      'u_image'\n    );\n\n    /**\n     * Holds info about custom uniforms used in the post processing pass\n     * @type {Array<UniformInternalDescription>}\n     * @private\n     */\n    this.uniforms_ = [];\n    options.uniforms &&\n      Object.keys(options.uniforms).forEach((name) => {\n        this.uniforms_.push({\n          value: options.uniforms[name],\n          location: gl.getUniformLocation(this.renderTargetProgram_, name),\n        });\n      });\n  }\n\n  /**\n   * Get the WebGL rendering context\n   * @return {WebGLRenderingContext} The rendering context.\n   * @api\n   */\n  getGL() {\n    return this.gl_;\n  }\n\n  /**\n   * Initialize the render target texture of the post process, make sure it is at the\n   * right size and bind it as a render target for the next draw calls.\n   * The last step to be initialized will be the one where the primitives are rendered.\n   * @param {import(\"../Map.js\").FrameState} frameState current frame state\n   * @api\n   */\n  init(frameState) {\n    const gl = this.getGL();\n    const textureSize = [\n      gl.drawingBufferWidth * this.scaleRatio_,\n      gl.drawingBufferHeight * this.scaleRatio_,\n    ];\n\n    // rendering goes to my buffer\n    gl.bindFramebuffer(gl.FRAMEBUFFER, this.getFrameBuffer());\n    gl.viewport(0, 0, textureSize[0], textureSize[1]);\n\n    // if size has changed: adjust canvas & render target texture\n    if (\n      !this.renderTargetTextureSize_ ||\n      this.renderTargetTextureSize_[0] !== textureSize[0] ||\n      this.renderTargetTextureSize_[1] !== textureSize[1]\n    ) {\n      this.renderTargetTextureSize_ = textureSize;\n\n      // create a new texture\n      const level = 0;\n      const internalFormat = gl.RGBA;\n      const border = 0;\n      const format = gl.RGBA;\n      const type = gl.UNSIGNED_BYTE;\n      const data = null;\n      gl.bindTexture(gl.TEXTURE_2D, this.renderTargetTexture_);\n      gl.texImage2D(\n        gl.TEXTURE_2D,\n        level,\n        internalFormat,\n        textureSize[0],\n        textureSize[1],\n        border,\n        format,\n        type,\n        data\n      );\n\n      gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR);\n      gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);\n      gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);\n\n      // bind the texture to the framebuffer\n      gl.framebufferTexture2D(\n        gl.FRAMEBUFFER,\n        gl.COLOR_ATTACHMENT0,\n        gl.TEXTURE_2D,\n        this.renderTargetTexture_,\n        0\n      );\n    }\n  }\n\n  /**\n   * Render to the next postprocessing pass (or to the canvas if final pass).\n   * @param {import(\"../Map.js\").FrameState} frameState current frame state\n   * @param {WebGLPostProcessingPass} [nextPass] Next pass, optional\n   * @param {function(WebGLRenderingContext, import(\"../Map.js\").FrameState):void} [preCompose] Called before composing.\n   * @param {function(WebGLRenderingContext, import(\"../Map.js\").FrameState):void} [postCompose] Called before composing.\n   * @api\n   */\n  apply(frameState, nextPass, preCompose, postCompose) {\n    const gl = this.getGL();\n    const size = frameState.size;\n\n    gl.bindFramebuffer(\n      gl.FRAMEBUFFER,\n      nextPass ? nextPass.getFrameBuffer() : null\n    );\n    gl.activeTexture(gl.TEXTURE0);\n    gl.bindTexture(gl.TEXTURE_2D, this.renderTargetTexture_);\n\n    if (!nextPass) {\n      // clear the canvas if we are the first to render to it\n      // and preserveDrawingBuffer is true\n      const canvasId = getUid(gl.canvas);\n      if (!frameState.renderTargets[canvasId]) {\n        const attributes = gl.getContextAttributes();\n        if (attributes && attributes.preserveDrawingBuffer) {\n          gl.clearColor(0.0, 0.0, 0.0, 0.0);\n          gl.clear(gl.COLOR_BUFFER_BIT);\n        }\n\n        frameState.renderTargets[canvasId] = true;\n      }\n    }\n\n    gl.enable(gl.BLEND);\n    gl.blendFunc(gl.ONE, gl.ONE_MINUS_SRC_ALPHA);\n    gl.viewport(0, 0, gl.drawingBufferWidth, gl.drawingBufferHeight);\n\n    gl.bindBuffer(gl.ARRAY_BUFFER, this.renderTargetVerticesBuffer_);\n\n    gl.useProgram(this.renderTargetProgram_);\n    gl.enableVertexAttribArray(this.renderTargetAttribLocation_);\n    gl.vertexAttribPointer(\n      this.renderTargetAttribLocation_,\n      2,\n      gl.FLOAT,\n      false,\n      0,\n      0\n    );\n    gl.uniform2f(this.renderTargetUniformLocation_, size[0], size[1]);\n    gl.uniform1i(this.renderTargetTextureLocation_, 0);\n\n    const opacity = frameState.layerStatesArray[frameState.layerIndex].opacity;\n    gl.uniform1f(this.renderTargetOpacityLocation_, opacity);\n\n    this.applyUniforms(frameState);\n\n    if (preCompose) {\n      preCompose(gl, frameState);\n    }\n    gl.drawArrays(gl.TRIANGLES, 0, 6);\n    if (postCompose) {\n      postCompose(gl, frameState);\n    }\n  }\n\n  /**\n   * @return {WebGLFramebuffer} Frame buffer\n   * @api\n   */\n  getFrameBuffer() {\n    return this.frameBuffer_;\n  }\n\n  /**\n   * Sets the custom uniforms based on what was given in the constructor.\n   * @param {import(\"../Map.js\").FrameState} frameState Frame state.\n   * @private\n   */\n  applyUniforms(frameState) {\n    const gl = this.getGL();\n\n    let value;\n    let textureSlot = 1;\n    this.uniforms_.forEach(function (uniform) {\n      value =\n        typeof uniform.value === 'function'\n          ? uniform.value(frameState)\n          : uniform.value;\n\n      // apply value based on type\n      if (value instanceof HTMLCanvasElement || value instanceof ImageData) {\n        // create a texture & put data\n        if (!uniform.texture) {\n          uniform.texture = gl.createTexture();\n        }\n        gl.activeTexture(gl[`TEXTURE${textureSlot}`]);\n        gl.bindTexture(gl.TEXTURE_2D, uniform.texture);\n        gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR);\n        gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);\n        gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);\n\n        if (value instanceof ImageData) {\n          gl.texImage2D(\n            gl.TEXTURE_2D,\n            0,\n            gl.RGBA,\n            gl.RGBA,\n            value.width,\n            value.height,\n            0,\n            gl.UNSIGNED_BYTE,\n            new Uint8Array(value.data)\n          );\n        } else {\n          gl.texImage2D(\n            gl.TEXTURE_2D,\n            0,\n            gl.RGBA,\n            gl.RGBA,\n            gl.UNSIGNED_BYTE,\n            value\n          );\n        }\n\n        // fill texture slots\n        gl.uniform1i(uniform.location, textureSlot++);\n      } else if (Array.isArray(value)) {\n        switch (value.length) {\n          case 2:\n            gl.uniform2f(uniform.location, value[0], value[1]);\n            return;\n          case 3:\n            gl.uniform3f(uniform.location, value[0], value[1], value[2]);\n            return;\n          case 4:\n            gl.uniform4f(\n              uniform.location,\n              value[0],\n              value[1],\n              value[2],\n              value[3]\n            );\n            return;\n          default:\n            return;\n        }\n      } else if (typeof value === 'number') {\n        gl.uniform1f(uniform.location, value);\n      }\n    });\n  }\n}\n\nexport default WebGLPostProcessingPass;\n","/**\n * @module ol/vec/mat4\n */\n\n/**\n * @return {Array<number>} \"4x4 matrix representing a 3D identity transform.\"\n */\nexport function create() {\n  return [1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1];\n}\n\n/**\n * @param {Array<number>} mat4 Flattened 4x4 matrix receiving the result.\n * @param {import(\"../transform.js\").Transform} transform Transformation matrix.\n * @return {Array<number>} \"2D transformation matrix as flattened 4x4 matrix.\"\n */\nexport function fromTransform(mat4, transform) {\n  mat4[0] = transform[0];\n  mat4[1] = transform[1];\n  mat4[4] = transform[2];\n  mat4[5] = transform[3];\n  mat4[12] = transform[4];\n  mat4[13] = transform[5];\n  return mat4;\n}\n","/**\n * @module ol/webgl/Helper\n */\nimport ContextEventType from '../webgl/ContextEventType.js';\nimport Disposable from '../Disposable.js';\nimport WebGLPostProcessingPass from './PostProcessingPass.js';\nimport {\n  FLOAT,\n  UNSIGNED_BYTE,\n  UNSIGNED_INT,\n  UNSIGNED_SHORT,\n  getContext,\n} from '../webgl.js';\nimport {clear} from '../obj.js';\nimport {\n  compose as composeTransform,\n  create as createTransform,\n  reset as resetTransform,\n  rotate as rotateTransform,\n  scale as scaleTransform,\n} from '../transform.js';\nimport {create, fromTransform} from '../vec/mat4.js';\nimport {getUid} from '../util.js';\n\n/**\n * @typedef {Object} BufferCacheEntry\n * @property {import(\"./Buffer.js\").default} buffer Buffer.\n * @property {WebGLBuffer} webGlBuffer WebGlBuffer.\n */\n\n/**\n * Shader types, either `FRAGMENT_SHADER` or `VERTEX_SHADER`.\n * @enum {number}\n */\nexport const ShaderType = {\n  FRAGMENT_SHADER: 0x8b30,\n  VERTEX_SHADER: 0x8b31,\n};\n\n/**\n * Names of uniforms made available to all shaders.\n * Please note: changing these *will* break custom shaders!\n * @enum {string}\n */\nexport const DefaultUniform = {\n  PROJECTION_MATRIX: 'u_projectionMatrix',\n  OFFSET_SCALE_MATRIX: 'u_offsetScaleMatrix',\n  OFFSET_ROTATION_MATRIX: 'u_offsetRotateMatrix',\n  TIME: 'u_time',\n  ZOOM: 'u_zoom',\n  RESOLUTION: 'u_resolution',\n  VIEWPORT_SIZE_PX: 'u_viewportSizePx',\n  PIXEL_RATIO: 'u_pixelRatio',\n  HIT_DETECTION: 'u_hitDetection',\n};\n\n/**\n * Attribute types, either `UNSIGNED_BYTE`, `UNSIGNED_SHORT`, `UNSIGNED_INT` or `FLOAT`\n * Note: an attribute stored in a `Float32Array` should be of type `FLOAT`.\n * @enum {number}\n */\nexport const AttributeType = {\n  UNSIGNED_BYTE: UNSIGNED_BYTE,\n  UNSIGNED_SHORT: UNSIGNED_SHORT,\n  UNSIGNED_INT: UNSIGNED_INT,\n  FLOAT: FLOAT,\n};\n\n/**\n * Description of an attribute in a buffer\n * @typedef {Object} AttributeDescription\n * @property {string} name Attribute name to use in shaders\n * @property {number} size Number of components per attributes\n * @property {AttributeType} [type] Attribute type, i.e. number of bytes used to store the value. This is\n * determined by the class of typed array which the buffer uses (eg. `Float32Array` for a `FLOAT` attribute).\n * Default is `FLOAT`.\n */\n\n/**\n * @typedef {number|Array<number>|HTMLCanvasElement|HTMLImageElement|ImageData|import(\"../transform\").Transform} UniformLiteralValue\n */\n\n/**\n * Uniform value can be a number, array of numbers (2 to 4), canvas element or a callback returning\n * one of the previous types.\n * @typedef {UniformLiteralValue|function(import(\"../Map.js\").FrameState):UniformLiteralValue} UniformValue\n */\n\n/**\n * @typedef {Object} PostProcessesOptions\n * @property {number} [scaleRatio] Scale ratio; if < 1, the post process will render to a texture smaller than\n * the main canvas which will then be sampled up (useful for saving resource on blur steps).\n * @property {string} [vertexShader] Vertex shader source\n * @property {string} [fragmentShader] Fragment shader source\n * @property {Object<string,UniformValue>} [uniforms] Uniform definitions for the post process step\n */\n\n/**\n * @typedef {Object} Options\n * @property {Object<string,UniformValue>} [uniforms] Uniform definitions; property names must match the uniform\n * names in the provided or default shaders.\n * @property {Array<PostProcessesOptions>} [postProcesses] Post-processes definitions\n * @property {string} [canvasCacheKey] The cache key for the canvas.\n */\n\n/**\n * @typedef {Object} UniformInternalDescription\n * @property {string} name Name\n * @property {UniformValue} [value] Value\n * @property {UniformValue} [prevValue] The previous value.\n * @property {WebGLTexture} [texture] Texture\n * @private\n */\n\n/**\n * @typedef {Object} CanvasCacheItem\n * @property {HTMLCanvasElement} canvas Canvas element.\n * @property {number} users The count of users of this canvas.\n */\n\n/**\n * @type {Object<string,CanvasCacheItem>}\n */\nconst canvasCache = {};\n\n/**\n * @param {string} key The cache key for the canvas.\n * @return {string} The shared cache key.\n */\nfunction getSharedCanvasCacheKey(key) {\n  return 'shared/' + key;\n}\n\nlet uniqueCanvasCacheKeyCount = 0;\n\n/**\n * @return {string} The unique cache key.\n */\nfunction getUniqueCanvasCacheKey() {\n  const key = 'unique/' + uniqueCanvasCacheKeyCount;\n  uniqueCanvasCacheKeyCount += 1;\n  return key;\n}\n\n/**\n * @param {string} key The cache key for the canvas.\n * @return {HTMLCanvasElement} The canvas.\n */\nfunction getCanvas(key) {\n  let cacheItem = canvasCache[key];\n  if (!cacheItem) {\n    const canvas = document.createElement('canvas');\n    canvas.style.position = 'absolute';\n    canvas.style.left = '0';\n    cacheItem = {users: 0, canvas};\n    canvasCache[key] = cacheItem;\n  }\n\n  cacheItem.users += 1;\n  return cacheItem.canvas;\n}\n\n/**\n * @param {string} key The cache key for the canvas.\n */\nfunction releaseCanvas(key) {\n  const cacheItem = canvasCache[key];\n  if (!cacheItem) {\n    return;\n  }\n\n  cacheItem.users -= 1;\n  if (cacheItem.users > 0) {\n    return;\n  }\n\n  const canvas = cacheItem.canvas;\n  const gl = getContext(canvas);\n  const extension = gl.getExtension('WEBGL_lose_context');\n  if (extension) {\n    extension.loseContext();\n  }\n\n  delete canvasCache[key];\n}\n\n/**\n * @classdesc\n * This class is intended to provide low-level functions related to WebGL rendering, so that accessing\n * directly the WebGL API should not be required anymore.\n *\n * Several operations are handled by the `WebGLHelper` class:\n *\n * ### Define custom shaders and uniforms\n *\n *   *Shaders* are low-level programs executed on the GPU and written in GLSL. There are two types of shaders:\n *\n *   Vertex shaders are used to manipulate the position and attribute of *vertices* of rendered primitives (ie. corners of a square).\n *   Outputs are:\n *\n *   * `gl_Position`: position of the vertex in screen space\n *\n *   * Varyings usually prefixed with `v_` are passed on to the fragment shader\n *\n *   Fragment shaders are used to control the actual color of the pixels drawn on screen. Their only output is `gl_FragColor`.\n *\n *   Both shaders can take *uniforms* or *attributes* as input. Attributes are explained later. Uniforms are common, read-only values that\n *   can be changed at every frame and can be of type float, arrays of float or images.\n *\n *   Shaders must be compiled and assembled into a program like so:\n *   ```js\n *   // here we simply create two shaders and assemble them in a program which is then used\n *   // for subsequent rendering calls; note how a frameState is required to set up a program,\n *   // as several default uniforms are computed from it (projection matrix, zoom level, etc.)\n *   const vertexShader = new WebGLVertex(VERTEX_SHADER);\n *   const fragmentShader = new WebGLFragment(FRAGMENT_SHADER);\n *   const program = this.context.getProgram(fragmentShader, vertexShader);\n *   helper.useProgram(this.program, frameState);\n *   ```\n *\n *   Uniforms are defined using the `uniforms` option and can either be explicit values or callbacks taking the frame state as argument.\n *   You can also change their value along the way like so:\n *   ```js\n *   helper.setUniformFloatValue('u_value', valueAsNumber);\n *   ```\n *\n * ### Defining post processing passes\n *\n *   *Post processing* describes the act of rendering primitives to a texture, and then rendering this texture to the final canvas\n *   while applying special effects in screen space.\n *   Typical uses are: blurring, color manipulation, depth of field, filtering...\n *\n *   The `WebGLHelper` class offers the possibility to define post processes at creation time using the `postProcesses` option.\n *   A post process step accepts the following options:\n *\n *   * `fragmentShader` and `vertexShader`: text literals in GLSL language that will be compiled and used in the post processing step.\n *   * `uniforms`: uniforms can be defined for the post processing steps just like for the main render.\n *   * `scaleRatio`: allows using an intermediate texture smaller or higher than the final canvas in the post processing step.\n *     This is typically used in blur steps to reduce the performance overhead by using an already downsampled texture as input.\n *\n *   The {@link module:ol/webgl/PostProcessingPass~WebGLPostProcessingPass} class is used internally, refer to its documentation for more info.\n *\n * ### Binding WebGL buffers and flushing data into them\n *\n *   Data that must be passed to the GPU has to be transferred using {@link module:ol/webgl/Buffer~WebGLArrayBuffer} objects.\n *   A buffer has to be created only once, but must be bound every time the buffer content will be used for rendering.\n *   This is done using {@link bindBuffer}.\n *   When the buffer's array content has changed, the new data has to be flushed to the GPU memory; this is done using\n *   {@link flushBufferData}. Note: this operation is expensive and should be done as infrequently as possible.\n *\n *   When binding an array buffer, a `target` parameter must be given: it should be either {@link module:ol/webgl.ARRAY_BUFFER}\n *   (if the buffer contains vertices data) or {@link module:ol/webgl.ELEMENT_ARRAY_BUFFER} (if the buffer contains indices data).\n *\n *   Examples below:\n *   ```js\n *   // at initialization phase\n *   const verticesBuffer = new WebGLArrayBuffer([], DYNAMIC_DRAW);\n *   const indicesBuffer = new WebGLArrayBuffer([], DYNAMIC_DRAW);\n *\n *   // when array values have changed\n *   helper.flushBufferData(ARRAY_BUFFER, this.verticesBuffer);\n *   helper.flushBufferData(ELEMENT_ARRAY_BUFFER, this.indicesBuffer);\n *\n *   // at rendering phase\n *   helper.bindBuffer(ARRAY_BUFFER, this.verticesBuffer);\n *   helper.bindBuffer(ELEMENT_ARRAY_BUFFER, this.indicesBuffer);\n *   ```\n *\n * ### Specifying attributes\n *\n *   The GPU only receives the data as arrays of numbers. These numbers must be handled differently depending on what it describes (position, texture coordinate...).\n *   Attributes are used to specify these uses. Specify the attribute names with\n *   {@link module:ol/webgl/Helper~WebGLHelper#enableAttributes} (see code snippet below).\n *\n *   Please note that you will have to specify the type and offset of the attributes in the data array. You can refer to the documentation of [WebGLRenderingContext.vertexAttribPointer](https://developer.mozilla.org/en-US/docs/Web/API/WebGLRenderingContext/vertexAttribPointer) for more explanation.\n *   ```js\n *   // here we indicate that the data array has the following structure:\n *   // [posX, posY, offsetX, offsetY, texCoordU, texCoordV, posX, posY, ...]\n *   helper.enableAttributes([\n *     {\n *        name: 'a_position',\n *        size: 2\n *     },\n *     {\n *       name: 'a_offset',\n *       size: 2\n *     },\n *     {\n *       name: 'a_texCoord',\n *       size: 2\n *     }\n *   ])\n *   ```\n *\n * ### Rendering primitives\n *\n *   Once all the steps above have been achieved, rendering primitives to the screen is done using {@link prepareDraw}, {@link drawElements} and {@link finalizeDraw}.\n *   ```js\n *   // frame preparation step\n *   helper.prepareDraw(frameState);\n *\n *   // call this for every data array that has to be rendered on screen\n *   helper.drawElements(0, this.indicesBuffer.getArray().length);\n *\n *   // finalize the rendering by applying post processes\n *   helper.finalizeDraw(frameState);\n *   ```\n *\n * For an example usage of this class, refer to {@link module:ol/renderer/webgl/PointsLayer~WebGLPointsLayerRenderer}.\n */\nclass WebGLHelper extends Disposable {\n  /**\n   * @param {Options} [options] Options.\n   */\n  constructor(options) {\n    super();\n    options = options || {};\n\n    /** @private */\n    this.boundHandleWebGLContextLost_ = this.handleWebGLContextLost.bind(this);\n\n    /** @private */\n    this.boundHandleWebGLContextRestored_ =\n      this.handleWebGLContextRestored.bind(this);\n\n    /**\n     * @private\n     * @type {string}\n     */\n    this.canvasCacheKey_ = options.canvasCacheKey\n      ? getSharedCanvasCacheKey(options.canvasCacheKey)\n      : getUniqueCanvasCacheKey();\n\n    /**\n     * @private\n     * @type {HTMLCanvasElement}\n     */\n    this.canvas_ = getCanvas(this.canvasCacheKey_);\n\n    /**\n     * @private\n     * @type {WebGLRenderingContext}\n     */\n    this.gl_ = getContext(this.canvas_);\n\n    /**\n     * @private\n     * @type {!Object<string, BufferCacheEntry>}\n     */\n    this.bufferCache_ = {};\n\n    /**\n     * @private\n     * @type {Object<string, Object>}\n     */\n    this.extensionCache_ = {};\n\n    /**\n     * @private\n     * @type {WebGLProgram}\n     */\n    this.currentProgram_ = null;\n\n    this.canvas_.addEventListener(\n      ContextEventType.LOST,\n      this.boundHandleWebGLContextLost_\n    );\n    this.canvas_.addEventListener(\n      ContextEventType.RESTORED,\n      this.boundHandleWebGLContextRestored_\n    );\n\n    /**\n     * @private\n     * @type {import(\"../transform.js\").Transform}\n     */\n    this.offsetRotateMatrix_ = createTransform();\n\n    /**\n     * @private\n     * @type {import(\"../transform.js\").Transform}\n     */\n    this.offsetScaleMatrix_ = createTransform();\n\n    /**\n     * @private\n     * @type {Array<number>}\n     */\n    this.tmpMat4_ = create();\n\n    /**\n     * @private\n     * @type {Object<string, Object<string, WebGLUniformLocation>>}\n     */\n    this.uniformLocationsByProgram_ = {};\n\n    /**\n     * @private\n     * @type {Object<string, Object<string, number>>}\n     */\n    this.attribLocationsByProgram_ = {};\n\n    /**\n     * Holds info about custom uniforms used in the post processing pass.\n     * If the uniform is a texture, the WebGL Texture object will be stored here.\n     * @type {Array<UniformInternalDescription>}\n     * @private\n     */\n    this.uniforms_ = [];\n    if (options.uniforms) {\n      this.setUniforms(options.uniforms);\n    }\n\n    /**\n     * An array of PostProcessingPass objects is kept in this variable, built from the steps provided in the\n     * options. If no post process was given, a default one is used (so as not to have to make an exception to\n     * the frame buffer logic).\n     * @type {Array<WebGLPostProcessingPass>}\n     * @private\n     */\n    this.postProcessPasses_ = options.postProcesses\n      ? options.postProcesses.map(\n          (options) =>\n            new WebGLPostProcessingPass({\n              webGlContext: this.gl_,\n              scaleRatio: options.scaleRatio,\n              vertexShader: options.vertexShader,\n              fragmentShader: options.fragmentShader,\n              uniforms: options.uniforms,\n            })\n        )\n      : [new WebGLPostProcessingPass({webGlContext: this.gl_})];\n\n    /**\n     * @type {string|null}\n     * @private\n     */\n    this.shaderCompileErrors_ = null;\n\n    /**\n     * @type {number}\n     * @private\n     */\n    this.startTime_ = Date.now();\n  }\n\n  /**\n   * @param {Object<string, UniformValue>} uniforms Uniform definitions.\n   */\n  setUniforms(uniforms) {\n    this.uniforms_ = [];\n    for (const name in uniforms) {\n      this.uniforms_.push({\n        name: name,\n        value: uniforms[name],\n      });\n    }\n  }\n\n  /**\n   * @param {string} canvasCacheKey The canvas cache key.\n   * @return {boolean} The provided key matches the one this helper was constructed with.\n   */\n  canvasCacheKeyMatches(canvasCacheKey) {\n    return this.canvasCacheKey_ === getSharedCanvasCacheKey(canvasCacheKey);\n  }\n\n  /**\n   * Get a WebGL extension.  If the extension is not supported, null is returned.\n   * Extensions are cached after they are enabled for the first time.\n   * @param {string} name The extension name.\n   * @return {Object|null} The extension or null if not supported.\n   */\n  getExtension(name) {\n    if (name in this.extensionCache_) {\n      return this.extensionCache_[name];\n    }\n    const extension = this.gl_.getExtension(name);\n    this.extensionCache_[name] = extension;\n    return extension;\n  }\n\n  /**\n   * Just bind the buffer if it's in the cache. Otherwise create\n   * the WebGL buffer, bind it, populate it, and add an entry to\n   * the cache.\n   * @param {import(\"./Buffer\").default} buffer Buffer.\n   */\n  bindBuffer(buffer) {\n    const gl = this.gl_;\n    const bufferKey = getUid(buffer);\n    let bufferCache = this.bufferCache_[bufferKey];\n    if (!bufferCache) {\n      const webGlBuffer = gl.createBuffer();\n      bufferCache = {\n        buffer: buffer,\n        webGlBuffer: webGlBuffer,\n      };\n      this.bufferCache_[bufferKey] = bufferCache;\n    }\n    gl.bindBuffer(buffer.getType(), bufferCache.webGlBuffer);\n  }\n\n  /**\n   * Update the data contained in the buffer array; this is required for the\n   * new data to be rendered\n   * @param {import(\"./Buffer\").default} buffer Buffer.\n   */\n  flushBufferData(buffer) {\n    const gl = this.gl_;\n    this.bindBuffer(buffer);\n    gl.bufferData(buffer.getType(), buffer.getArray(), buffer.getUsage());\n  }\n\n  /**\n   * @param {import(\"./Buffer.js\").default} buf Buffer.\n   */\n  deleteBuffer(buf) {\n    const gl = this.gl_;\n    const bufferKey = getUid(buf);\n    const bufferCacheEntry = this.bufferCache_[bufferKey];\n    if (bufferCacheEntry && !gl.isContextLost()) {\n      gl.deleteBuffer(bufferCacheEntry.webGlBuffer);\n    }\n    delete this.bufferCache_[bufferKey];\n  }\n\n  /**\n   * Clean up.\n   */\n  disposeInternal() {\n    this.canvas_.removeEventListener(\n      ContextEventType.LOST,\n      this.boundHandleWebGLContextLost_\n    );\n    this.canvas_.removeEventListener(\n      ContextEventType.RESTORED,\n      this.boundHandleWebGLContextRestored_\n    );\n\n    releaseCanvas(this.canvasCacheKey_);\n\n    delete this.gl_;\n    delete this.canvas_;\n  }\n\n  /**\n   * Clear the buffer & set the viewport to draw.\n   * Post process passes will be initialized here, the first one being bound as a render target for\n   * subsequent draw calls.\n   * @param {import(\"../Map.js\").FrameState} frameState current frame state\n   * @param {boolean} [disableAlphaBlend] If true, no alpha blending will happen.\n   */\n  prepareDraw(frameState, disableAlphaBlend) {\n    const gl = this.gl_;\n    const canvas = this.getCanvas();\n    const size = frameState.size;\n    const pixelRatio = frameState.pixelRatio;\n\n    if (\n      canvas.width !== size[0] * pixelRatio ||\n      canvas.height !== size[1] * pixelRatio\n    ) {\n      canvas.width = size[0] * pixelRatio;\n      canvas.height = size[1] * pixelRatio;\n      canvas.style.width = size[0] + 'px';\n      canvas.style.height = size[1] + 'px';\n    }\n\n    // loop backwards in post processes list\n    for (let i = this.postProcessPasses_.length - 1; i >= 0; i--) {\n      this.postProcessPasses_[i].init(frameState);\n    }\n\n    gl.bindTexture(gl.TEXTURE_2D, null);\n\n    gl.clearColor(0.0, 0.0, 0.0, 0.0);\n    gl.clear(gl.COLOR_BUFFER_BIT);\n\n    gl.enable(gl.BLEND);\n    gl.blendFunc(gl.ONE, disableAlphaBlend ? gl.ZERO : gl.ONE_MINUS_SRC_ALPHA);\n  }\n\n  /**\n   * Prepare a program to use a texture.\n   * @param {WebGLTexture} texture The texture.\n   * @param {number} slot The texture slot.\n   * @param {string} uniformName The corresponding uniform name.\n   */\n  bindTexture(texture, slot, uniformName) {\n    const gl = this.gl_;\n    gl.activeTexture(gl.TEXTURE0 + slot);\n    gl.bindTexture(gl.TEXTURE_2D, texture);\n    gl.uniform1i(this.getUniformLocation(uniformName), slot);\n  }\n\n  /**\n   * Clear the render target & bind it for future draw operations.\n   * This is similar to `prepareDraw`, only post processes will not be applied.\n   * Note: the whole viewport will be drawn to the render target, regardless of its size.\n   * @param {import(\"../Map.js\").FrameState} frameState current frame state\n   * @param {import(\"./RenderTarget.js\").default} renderTarget Render target to draw to\n   * @param {boolean} [disableAlphaBlend] If true, no alpha blending will happen.\n   */\n  prepareDrawToRenderTarget(frameState, renderTarget, disableAlphaBlend) {\n    const gl = this.gl_;\n    const size = renderTarget.getSize();\n\n    gl.bindFramebuffer(gl.FRAMEBUFFER, renderTarget.getFramebuffer());\n    gl.viewport(0, 0, size[0], size[1]);\n    gl.bindTexture(gl.TEXTURE_2D, renderTarget.getTexture());\n    gl.clearColor(0.0, 0.0, 0.0, 0.0);\n    gl.clear(gl.COLOR_BUFFER_BIT);\n    gl.enable(gl.BLEND);\n    gl.blendFunc(gl.ONE, disableAlphaBlend ? gl.ZERO : gl.ONE_MINUS_SRC_ALPHA);\n  }\n\n  /**\n   * Execute a draw call based on the currently bound program, texture, buffers, attributes.\n   * @param {number} start Start index.\n   * @param {number} end End index.\n   */\n  drawElements(start, end) {\n    const gl = this.gl_;\n    this.getExtension('OES_element_index_uint');\n\n    const elementType = gl.UNSIGNED_INT;\n    const elementSize = 4;\n\n    const numItems = end - start;\n    const offsetInBytes = start * elementSize;\n    gl.drawElements(gl.TRIANGLES, numItems, elementType, offsetInBytes);\n  }\n\n  /**\n   * Apply the successive post process passes which will eventually render to the actual canvas.\n   * @param {import(\"../Map.js\").FrameState} frameState current frame state\n   * @param {function(WebGLRenderingContext, import(\"../Map.js\").FrameState):void} [preCompose] Called before composing.\n   * @param {function(WebGLRenderingContext, import(\"../Map.js\").FrameState):void} [postCompose] Called before composing.\n   */\n  finalizeDraw(frameState, preCompose, postCompose) {\n    // apply post processes using the next one as target\n    for (let i = 0, ii = this.postProcessPasses_.length; i < ii; i++) {\n      if (i === ii - 1) {\n        this.postProcessPasses_[i].apply(\n          frameState,\n          null,\n          preCompose,\n          postCompose\n        );\n      } else {\n        this.postProcessPasses_[i].apply(\n          frameState,\n          this.postProcessPasses_[i + 1]\n        );\n      }\n    }\n  }\n\n  /**\n   * @return {HTMLCanvasElement} Canvas.\n   */\n  getCanvas() {\n    return this.canvas_;\n  }\n\n  /**\n   * Get the WebGL rendering context\n   * @return {WebGLRenderingContext} The rendering context.\n   */\n  getGL() {\n    return this.gl_;\n  }\n\n  /**\n   * Sets the default matrix uniforms for a given frame state. This is called internally in `prepareDraw`.\n   * @param {import(\"../Map.js\").FrameState} frameState Frame state.\n   */\n  applyFrameState(frameState) {\n    const size = frameState.size;\n    const rotation = frameState.viewState.rotation;\n    const pixelRatio = frameState.pixelRatio;\n\n    const offsetScaleMatrix = resetTransform(this.offsetScaleMatrix_);\n    scaleTransform(offsetScaleMatrix, 2 / size[0], 2 / size[1]);\n\n    const offsetRotateMatrix = resetTransform(this.offsetRotateMatrix_);\n    if (rotation !== 0) {\n      rotateTransform(offsetRotateMatrix, -rotation);\n    }\n\n    this.setUniformMatrixValue(\n      DefaultUniform.OFFSET_SCALE_MATRIX,\n      fromTransform(this.tmpMat4_, offsetScaleMatrix)\n    );\n    this.setUniformMatrixValue(\n      DefaultUniform.OFFSET_ROTATION_MATRIX,\n      fromTransform(this.tmpMat4_, offsetRotateMatrix)\n    );\n\n    this.setUniformFloatValue(\n      DefaultUniform.TIME,\n      (Date.now() - this.startTime_) * 0.001\n    );\n    this.setUniformFloatValue(DefaultUniform.ZOOM, frameState.viewState.zoom);\n    this.setUniformFloatValue(\n      DefaultUniform.RESOLUTION,\n      frameState.viewState.resolution\n    );\n    this.setUniformFloatValue(DefaultUniform.PIXEL_RATIO, pixelRatio);\n    this.setUniformFloatVec2(DefaultUniform.VIEWPORT_SIZE_PX, [\n      size[0],\n      size[1],\n    ]);\n  }\n\n  /**\n   * Sets the `u_hitDetection` uniform.\n   * @param {boolean} enabled Whether to enable the hit detection code path\n   */\n  applyHitDetectionUniform(enabled) {\n    const loc = this.getUniformLocation(DefaultUniform.HIT_DETECTION);\n    this.getGL().uniform1i(loc, enabled ? 1 : 0);\n  }\n\n  /**\n   * Sets the custom uniforms based on what was given in the constructor. This is called internally in `prepareDraw`.\n   * @param {import(\"../Map.js\").FrameState} frameState Frame state.\n   */\n  applyUniforms(frameState) {\n    const gl = this.gl_;\n\n    let value;\n    let textureSlot = 0;\n    this.uniforms_.forEach((uniform) => {\n      value =\n        typeof uniform.value === 'function'\n          ? uniform.value(frameState)\n          : uniform.value;\n\n      // apply value based on type\n      if (\n        value instanceof HTMLCanvasElement ||\n        value instanceof HTMLImageElement ||\n        value instanceof ImageData\n      ) {\n        // create a texture & put data\n        if (!uniform.texture) {\n          uniform.prevValue = undefined;\n          uniform.texture = gl.createTexture();\n        }\n        gl.activeTexture(gl[`TEXTURE${textureSlot}`]);\n        gl.bindTexture(gl.TEXTURE_2D, uniform.texture);\n        gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR);\n        gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);\n        gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);\n\n        const imageReady =\n          !(value instanceof HTMLImageElement) ||\n          /** @type {HTMLImageElement} */ (value).complete;\n        if (imageReady && uniform.prevValue !== value) {\n          uniform.prevValue = value;\n          gl.texImage2D(\n            gl.TEXTURE_2D,\n            0,\n            gl.RGBA,\n            gl.RGBA,\n            gl.UNSIGNED_BYTE,\n            value\n          );\n        }\n\n        // fill texture slots by increasing index\n        gl.uniform1i(this.getUniformLocation(uniform.name), textureSlot++);\n      } else if (Array.isArray(value) && value.length === 6) {\n        this.setUniformMatrixValue(\n          uniform.name,\n          fromTransform(this.tmpMat4_, value)\n        );\n      } else if (Array.isArray(value) && value.length <= 4) {\n        switch (value.length) {\n          case 2:\n            gl.uniform2f(\n              this.getUniformLocation(uniform.name),\n              value[0],\n              value[1]\n            );\n            return;\n          case 3:\n            gl.uniform3f(\n              this.getUniformLocation(uniform.name),\n              value[0],\n              value[1],\n              value[2]\n            );\n            return;\n          case 4:\n            gl.uniform4f(\n              this.getUniformLocation(uniform.name),\n              value[0],\n              value[1],\n              value[2],\n              value[3]\n            );\n            return;\n          default:\n            return;\n        }\n      } else if (typeof value === 'number') {\n        gl.uniform1f(this.getUniformLocation(uniform.name), value);\n      }\n    });\n  }\n\n  /**\n   * Set up a program for use. The program will be set as the current one. Then, the uniforms used\n   * in the program will be set based on the current frame state and the helper configuration.\n   * @param {WebGLProgram} program Program.\n   * @param {import(\"../Map.js\").FrameState} frameState Frame state.\n   */\n  useProgram(program, frameState) {\n    const gl = this.gl_;\n    gl.useProgram(program);\n    this.currentProgram_ = program;\n    this.applyFrameState(frameState);\n    this.applyUniforms(frameState);\n  }\n\n  /**\n   * Will attempt to compile a vertex or fragment shader based on source\n   * On error, the shader will be returned but\n   * `gl.getShaderParameter(shader, gl.COMPILE_STATUS)` will return `true`\n   * Use `gl.getShaderInfoLog(shader)` to have details\n   * @param {string} source Shader source\n   * @param {ShaderType} type VERTEX_SHADER or FRAGMENT_SHADER\n   * @return {WebGLShader} Shader object\n   */\n  compileShader(source, type) {\n    const gl = this.gl_;\n    const shader = gl.createShader(type);\n    gl.shaderSource(shader, source);\n    gl.compileShader(shader);\n    return shader;\n  }\n\n  /**\n   * Create a program for a vertex and fragment shader.  Throws if shader compilation fails.\n   * @param {string} fragmentShaderSource Fragment shader source.\n   * @param {string} vertexShaderSource Vertex shader source.\n   * @return {WebGLProgram} Program\n   */\n  getProgram(fragmentShaderSource, vertexShaderSource) {\n    const gl = this.gl_;\n\n    const fragmentShader = this.compileShader(\n      fragmentShaderSource,\n      gl.FRAGMENT_SHADER\n    );\n\n    const vertexShader = this.compileShader(\n      vertexShaderSource,\n      gl.VERTEX_SHADER\n    );\n\n    const program = gl.createProgram();\n    gl.attachShader(program, fragmentShader);\n    gl.attachShader(program, vertexShader);\n    gl.linkProgram(program);\n\n    if (!gl.getShaderParameter(fragmentShader, gl.COMPILE_STATUS)) {\n      const message = `Fragment shader compilation failed: ${gl.getShaderInfoLog(\n        fragmentShader\n      )}`;\n      throw new Error(message);\n    }\n    gl.deleteShader(fragmentShader);\n\n    if (!gl.getShaderParameter(vertexShader, gl.COMPILE_STATUS)) {\n      const message = `Vertex shader compilation failed: ${gl.getShaderInfoLog(\n        vertexShader\n      )}`;\n      throw new Error(message);\n    }\n    gl.deleteShader(vertexShader);\n\n    if (!gl.getProgramParameter(program, gl.LINK_STATUS)) {\n      const message = `GL program linking failed: ${gl.getProgramInfoLog(\n        program\n      )}`;\n      throw new Error(message);\n    }\n\n    return program;\n  }\n\n  /**\n   * Will get the location from the shader or the cache\n   * @param {string} name Uniform name\n   * @return {WebGLUniformLocation} uniformLocation\n   */\n  getUniformLocation(name) {\n    const programUid = getUid(this.currentProgram_);\n    if (this.uniformLocationsByProgram_[programUid] === undefined) {\n      this.uniformLocationsByProgram_[programUid] = {};\n    }\n    if (this.uniformLocationsByProgram_[programUid][name] === undefined) {\n      this.uniformLocationsByProgram_[programUid][name] =\n        this.gl_.getUniformLocation(this.currentProgram_, name);\n    }\n    return this.uniformLocationsByProgram_[programUid][name];\n  }\n\n  /**\n   * Will get the location from the shader or the cache\n   * @param {string} name Attribute name\n   * @return {number} attribLocation\n   */\n  getAttributeLocation(name) {\n    const programUid = getUid(this.currentProgram_);\n    if (this.attribLocationsByProgram_[programUid] === undefined) {\n      this.attribLocationsByProgram_[programUid] = {};\n    }\n    if (this.attribLocationsByProgram_[programUid][name] === undefined) {\n      this.attribLocationsByProgram_[programUid][name] =\n        this.gl_.getAttribLocation(this.currentProgram_, name);\n    }\n    return this.attribLocationsByProgram_[programUid][name];\n  }\n\n  /**\n   * Sets the given transform to apply the rotation/translation/scaling of the given frame state.\n   * The resulting transform can be used to convert world space coordinates to view coordinates in the [-1, 1] range.\n   * @param {import(\"../Map.js\").FrameState} frameState Frame state.\n   * @param {import(\"../transform\").Transform} transform Transform to update.\n   * @return {import(\"../transform\").Transform} The updated transform object.\n   */\n  makeProjectionTransform(frameState, transform) {\n    const size = frameState.size;\n    const rotation = frameState.viewState.rotation;\n    const resolution = frameState.viewState.resolution;\n    const center = frameState.viewState.center;\n    composeTransform(\n      transform,\n      0,\n      0,\n      2 / (resolution * size[0]),\n      2 / (resolution * size[1]),\n      -rotation,\n      -center[0],\n      -center[1]\n    );\n    return transform;\n  }\n\n  /**\n   * Give a value for a standard float uniform\n   * @param {string} uniform Uniform name\n   * @param {number} value Value\n   */\n  setUniformFloatValue(uniform, value) {\n    this.gl_.uniform1f(this.getUniformLocation(uniform), value);\n  }\n\n  /**\n   * Give a value for a vec2 uniform\n   * @param {string} uniform Uniform name\n   * @param {Array<number>} value Array of length 4.\n   */\n  setUniformFloatVec2(uniform, value) {\n    this.gl_.uniform2fv(this.getUniformLocation(uniform), value);\n  }\n\n  /**\n   * Give a value for a vec4 uniform\n   * @param {string} uniform Uniform name\n   * @param {Array<number>} value Array of length 4.\n   */\n  setUniformFloatVec4(uniform, value) {\n    this.gl_.uniform4fv(this.getUniformLocation(uniform), value);\n  }\n\n  /**\n   * Give a value for a standard matrix4 uniform\n   * @param {string} uniform Uniform name\n   * @param {Array<number>} value Matrix value\n   */\n  setUniformMatrixValue(uniform, value) {\n    this.gl_.uniformMatrix4fv(this.getUniformLocation(uniform), false, value);\n  }\n\n  /**\n   * Will set the currently bound buffer to an attribute of the shader program. Used by `#enableAttributes`\n   * internally.\n   * @param {string} attribName Attribute name\n   * @param {number} size Number of components per attributes\n   * @param {number} type UNSIGNED_INT, UNSIGNED_BYTE, UNSIGNED_SHORT or FLOAT\n   * @param {number} stride Stride in bytes (0 means attribs are packed)\n   * @param {number} offset Offset in bytes\n   * @private\n   */\n  enableAttributeArray_(attribName, size, type, stride, offset) {\n    const location = this.getAttributeLocation(attribName);\n    // the attribute has not been found in the shaders or is not used; do not enable it\n    if (location < 0) {\n      return;\n    }\n    this.gl_.enableVertexAttribArray(location);\n    this.gl_.vertexAttribPointer(location, size, type, false, stride, offset);\n  }\n\n  /**\n   * Will enable the following attributes to be read from the currently bound buffer,\n   * i.e. tell the GPU where to read the different attributes in the buffer. An error in the\n   * size/type/order of attributes will most likely break the rendering and throw a WebGL exception.\n   * @param {Array<AttributeDescription>} attributes Ordered list of attributes to read from the buffer\n   */\n  enableAttributes(attributes) {\n    const stride = computeAttributesStride(attributes);\n    let offset = 0;\n    for (let i = 0; i < attributes.length; i++) {\n      const attr = attributes[i];\n      this.enableAttributeArray_(\n        attr.name,\n        attr.size,\n        attr.type || FLOAT,\n        stride,\n        offset\n      );\n      offset += attr.size * getByteSizeFromType(attr.type);\n    }\n  }\n\n  /**\n   * WebGL context was lost\n   * @private\n   */\n  handleWebGLContextLost() {\n    clear(this.bufferCache_);\n    this.currentProgram_ = null;\n  }\n\n  /**\n   * WebGL context was restored\n   * @private\n   */\n  handleWebGLContextRestored() {}\n\n  /**\n   * Will create or reuse a given webgl texture and apply the given size. If no image data\n   * specified, the texture will be empty, otherwise image data will be used and the `size`\n   * parameter will be ignored.\n   * Note: wrap parameters are set to clamp to edge, min filter is set to linear.\n   * @param {Array<number>} size Expected size of the texture\n   * @param {ImageData|HTMLImageElement|HTMLCanvasElement} [data] Image data/object to bind to the texture\n   * @param {WebGLTexture} [texture] Existing texture to reuse\n   * @return {WebGLTexture} The generated texture\n   */\n  createTexture(size, data, texture) {\n    const gl = this.gl_;\n    texture = texture || gl.createTexture();\n\n    // set params & size\n    const level = 0;\n    const internalFormat = gl.RGBA;\n    const border = 0;\n    const format = gl.RGBA;\n    const type = gl.UNSIGNED_BYTE;\n    gl.bindTexture(gl.TEXTURE_2D, texture);\n    if (data) {\n      gl.texImage2D(gl.TEXTURE_2D, level, internalFormat, format, type, data);\n    } else {\n      gl.texImage2D(\n        gl.TEXTURE_2D,\n        level,\n        internalFormat,\n        size[0],\n        size[1],\n        border,\n        format,\n        type,\n        null\n      );\n    }\n    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR);\n    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);\n    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);\n\n    return texture;\n  }\n}\n\n/**\n * Compute a stride in bytes based on a list of attributes\n * @param {Array<AttributeDescription>} attributes Ordered list of attributes\n * @return {number} Stride, ie amount of values for each vertex in the vertex buffer\n */\nexport function computeAttributesStride(attributes) {\n  let stride = 0;\n  for (let i = 0; i < attributes.length; i++) {\n    const attr = attributes[i];\n    stride += attr.size * getByteSizeFromType(attr.type);\n  }\n  return stride;\n}\n\n/**\n * Computes the size in byte of an attribute type.\n * @param {AttributeType} type Attribute type\n * @return {number} The size in bytes\n */\nfunction getByteSizeFromType(type) {\n  switch (type) {\n    case AttributeType.UNSIGNED_BYTE:\n      return Uint8Array.BYTES_PER_ELEMENT;\n    case AttributeType.UNSIGNED_SHORT:\n      return Uint16Array.BYTES_PER_ELEMENT;\n    case AttributeType.UNSIGNED_INT:\n      return Uint32Array.BYTES_PER_ELEMENT;\n    case AttributeType.FLOAT:\n    default:\n      return Float32Array.BYTES_PER_ELEMENT;\n  }\n}\n\nexport default WebGLHelper;\n","/**\n * @module ol/webgl/PaletteTexture\n */\n\nclass PaletteTexture {\n  /**\n   * @param {string} name The name of the texture.\n   * @param {Uint8Array} data The texture data.\n   */\n  constructor(name, data) {\n    this.name = name;\n    this.data = data;\n\n    /**\n     * @type {WebGLTexture}\n     * @private\n     */\n    this.texture_ = null;\n  }\n\n  /**\n   * @param {WebGLRenderingContext} gl Rendering context.\n   * @return {WebGLTexture} The texture.\n   */\n  getTexture(gl) {\n    if (!this.texture_) {\n      const texture = gl.createTexture();\n      gl.bindTexture(gl.TEXTURE_2D, texture);\n      gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);\n      gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);\n      gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);\n      gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);\n      gl.texImage2D(\n        gl.TEXTURE_2D,\n        0,\n        gl.RGBA,\n        this.data.length / 4,\n        1,\n        0,\n        gl.RGBA,\n        gl.UNSIGNED_BYTE,\n        this.data\n      );\n      this.texture_ = texture;\n    }\n    return this.texture_;\n  }\n}\n\nexport default PaletteTexture;\n","/**\n * A wrapper class to simplify rendering to a texture instead of the final canvas\n * @module ol/webgl/RenderTarget\n */\nimport {equals} from '../array.js';\n\n// for pixel color reading\nconst tmpArray4 = new Uint8Array(4);\n\n/**\n * @classdesc\n * This class is a wrapper around the association of both a `WebGLTexture` and a `WebGLFramebuffer` instances,\n * simplifying initialization and binding for rendering.\n * @api\n */\nclass WebGLRenderTarget {\n  /**\n   * @param {import(\"./Helper.js\").default} helper WebGL helper; mandatory.\n   * @param {Array<number>} [size] Expected size of the render target texture; note: this can be changed later on.\n   */\n  constructor(helper, size) {\n    /**\n     * @private\n     * @type {import(\"./Helper.js\").default}\n     */\n    this.helper_ = helper;\n    const gl = helper.getGL();\n\n    /**\n     * @private\n     * @type {WebGLTexture}\n     */\n    this.texture_ = gl.createTexture();\n\n    /**\n     * @private\n     * @type {WebGLFramebuffer}\n     */\n    this.framebuffer_ = gl.createFramebuffer();\n\n    /**\n     * @type {Array<number>}\n     * @private\n     */\n    this.size_ = size || [1, 1];\n\n    /**\n     * @type {Uint8Array}\n     * @private\n     */\n    this.data_ = new Uint8Array(0);\n\n    /**\n     * @type {boolean}\n     * @private\n     */\n    this.dataCacheDirty_ = true;\n\n    this.updateSize_();\n  }\n\n  /**\n   * Changes the size of the render target texture. Note: will do nothing if the size\n   * is already the same.\n   * @param {Array<number>} size Expected size of the render target texture\n   * @api\n   */\n  setSize(size) {\n    if (equals(size, this.size_)) {\n      return;\n    }\n    this.size_[0] = size[0];\n    this.size_[1] = size[1];\n    this.updateSize_();\n  }\n\n  /**\n   * Returns the size of the render target texture\n   * @return {Array<number>} Size of the render target texture\n   * @api\n   */\n  getSize() {\n    return this.size_;\n  }\n\n  /**\n   * This will cause following calls to `#readAll` or `#readPixel` to download the content of the\n   * render target into memory, which is an expensive operation.\n   * This content will be kept in cache but should be cleared after each new render.\n   * @api\n   */\n  clearCachedData() {\n    this.dataCacheDirty_ = true;\n  }\n\n  /**\n   * Returns the full content of the frame buffer as a series of r, g, b, a components\n   * in the 0-255 range (unsigned byte).\n   * @return {Uint8Array} Integer array of color values\n   * @api\n   */\n  readAll() {\n    if (this.dataCacheDirty_) {\n      const size = this.size_;\n      const gl = this.helper_.getGL();\n\n      gl.bindFramebuffer(gl.FRAMEBUFFER, this.framebuffer_);\n      gl.readPixels(\n        0,\n        0,\n        size[0],\n        size[1],\n        gl.RGBA,\n        gl.UNSIGNED_BYTE,\n        this.data_\n      );\n      this.dataCacheDirty_ = false;\n    }\n    return this.data_;\n  }\n\n  /**\n   * Reads one pixel of the frame buffer as an array of r, g, b, a components\n   * in the 0-255 range (unsigned byte).\n   * If x and/or y are outside of existing data, an array filled with 0 is returned.\n   * @param {number} x Pixel coordinate\n   * @param {number} y Pixel coordinate\n   * @return {Uint8Array} Integer array with one color value (4 components)\n   * @api\n   */\n  readPixel(x, y) {\n    if (x < 0 || y < 0 || x > this.size_[0] || y >= this.size_[1]) {\n      tmpArray4[0] = 0;\n      tmpArray4[1] = 0;\n      tmpArray4[2] = 0;\n      tmpArray4[3] = 0;\n      return tmpArray4;\n    }\n\n    this.readAll();\n    const index =\n      Math.floor(x) + (this.size_[1] - Math.floor(y) - 1) * this.size_[0];\n    tmpArray4[0] = this.data_[index * 4];\n    tmpArray4[1] = this.data_[index * 4 + 1];\n    tmpArray4[2] = this.data_[index * 4 + 2];\n    tmpArray4[3] = this.data_[index * 4 + 3];\n    return tmpArray4;\n  }\n\n  /**\n   * @return {WebGLTexture} Texture to render to\n   */\n  getTexture() {\n    return this.texture_;\n  }\n\n  /**\n   * @return {WebGLFramebuffer} Frame buffer of the render target\n   */\n  getFramebuffer() {\n    return this.framebuffer_;\n  }\n\n  /**\n   * @private\n   */\n  updateSize_() {\n    const size = this.size_;\n    const gl = this.helper_.getGL();\n\n    this.texture_ = this.helper_.createTexture(size, null, this.texture_);\n\n    gl.bindFramebuffer(gl.FRAMEBUFFER, this.framebuffer_);\n    gl.viewport(0, 0, size[0], size[1]);\n    gl.framebufferTexture2D(\n      gl.FRAMEBUFFER,\n      gl.COLOR_ATTACHMENT0,\n      gl.TEXTURE_2D,\n      this.texture_,\n      0\n    );\n\n    this.data_ = new Uint8Array(size[0] * size[1] * 4);\n  }\n}\n\nexport default WebGLRenderTarget;\n","/**\n * @module ol/webgl/TileTexture\n */\n\nimport BaseTileRepresentation from './BaseTileRepresentation.js';\nimport DataTile, {asArrayLike, asImageLike} from '../DataTile.js';\nimport EventType from '../events/EventType.js';\nimport ImageTile from '../ImageTile.js';\nimport ReprojTile from '../reproj/Tile.js';\nimport WebGLArrayBuffer from './Buffer.js';\nimport {ARRAY_BUFFER, STATIC_DRAW} from '../webgl.js';\nimport {createCanvasContext2D} from '../dom.js';\nimport {toSize} from '../size.js';\n\n/**\n * @param {WebGLRenderingContext} gl The WebGL context.\n * @param {WebGLTexture} texture The texture.\n * @param {boolean} interpolate Interpolate when resampling.\n */\nfunction bindAndConfigure(gl, texture, interpolate) {\n  const resampleFilter = interpolate ? gl.LINEAR : gl.NEAREST;\n  gl.bindTexture(gl.TEXTURE_2D, texture);\n  gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);\n  gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);\n  gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, resampleFilter);\n  gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, resampleFilter);\n}\n\n/**\n * @param {WebGLRenderingContext} gl The WebGL context.\n * @param {WebGLTexture} texture The texture.\n * @param {import(\"../DataTile.js\").ImageLike} image The image.\n * @param {boolean} interpolate Interpolate when resampling.\n */\nfunction uploadImageTexture(gl, texture, image, interpolate) {\n  bindAndConfigure(gl, texture, interpolate);\n\n  gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, image);\n}\n\n/**\n * @param {import(\"./Helper.js\").default} helper The WebGL helper.\n * @param {WebGLTexture} texture The texture.\n * @param {import(\"../DataTile.js\").ArrayLike} data The pixel data.\n * @param {import(\"../size.js\").Size} size The pixel size.\n * @param {number} bandCount The band count.\n * @param {boolean} interpolate Interpolate when resampling.\n */\nfunction uploadDataTexture(\n  helper,\n  texture,\n  data,\n  size,\n  bandCount,\n  interpolate\n) {\n  const gl = helper.getGL();\n  let textureType;\n  let canInterpolate;\n  if (data instanceof Float32Array) {\n    textureType = gl.FLOAT;\n    helper.getExtension('OES_texture_float');\n    const extension = helper.getExtension('OES_texture_float_linear');\n    canInterpolate = extension !== null;\n  } else {\n    textureType = gl.UNSIGNED_BYTE;\n    canInterpolate = true;\n  }\n  bindAndConfigure(gl, texture, interpolate && canInterpolate);\n\n  const bytesPerRow = data.byteLength / size[1];\n  let unpackAlignment = 1;\n  if (bytesPerRow % 8 === 0) {\n    unpackAlignment = 8;\n  } else if (bytesPerRow % 4 === 0) {\n    unpackAlignment = 4;\n  } else if (bytesPerRow % 2 === 0) {\n    unpackAlignment = 2;\n  }\n\n  let format;\n  switch (bandCount) {\n    case 1: {\n      format = gl.LUMINANCE;\n      break;\n    }\n    case 2: {\n      format = gl.LUMINANCE_ALPHA;\n      break;\n    }\n    case 3: {\n      format = gl.RGB;\n      break;\n    }\n    case 4: {\n      format = gl.RGBA;\n      break;\n    }\n    default: {\n      throw new Error(`Unsupported number of bands: ${bandCount}`);\n    }\n  }\n\n  const oldUnpackAlignment = gl.getParameter(gl.UNPACK_ALIGNMENT);\n  gl.pixelStorei(gl.UNPACK_ALIGNMENT, unpackAlignment);\n  gl.texImage2D(\n    gl.TEXTURE_2D,\n    0,\n    format,\n    size[0],\n    size[1],\n    0,\n    format,\n    textureType,\n    data\n  );\n  gl.pixelStorei(gl.UNPACK_ALIGNMENT, oldUnpackAlignment);\n}\n\n/**\n * @type {CanvasRenderingContext2D}\n */\nlet pixelContext = null;\n\nfunction createPixelContext() {\n  pixelContext = createCanvasContext2D(1, 1, undefined, {\n    willReadFrequently: true,\n  });\n}\n\n/**\n * @typedef {import(\"../DataTile.js\").default|ImageTile|ReprojTile} TileType\n */\n\n/**\n * @extends {BaseTileRepresentation<TileType>}\n */\nclass TileTexture extends BaseTileRepresentation {\n  /**\n   * @param {import(\"./BaseTileRepresentation.js\").TileRepresentationOptions<TileType>} options The tile texture options.\n   */\n  constructor(options) {\n    super(options);\n\n    /**\n     * @type {Array<WebGLTexture>}\n     */\n    this.textures = [];\n\n    /**\n     * @type {import(\"../size.js\").Size}\n     * @private\n     */\n    this.renderSize_ = toSize(\n      options.grid.getTileSize(options.tile.tileCoord[0])\n    );\n\n    /**\n     * @type {number}\n     */\n    this.bandCount = NaN;\n\n    const coords = new WebGLArrayBuffer(ARRAY_BUFFER, STATIC_DRAW);\n    coords.fromArray([\n      0, // P0\n      1,\n      1, // P1\n      1,\n      1, // P2\n      0,\n      0, // P3\n      0,\n    ]);\n    this.helper_.flushBufferData(coords);\n\n    /**\n     * @type {WebGLArrayBuffer}\n     */\n    this.coords = coords;\n\n    this.setTile(options.tile);\n  }\n\n  uploadTile() {\n    const helper = this.helper_;\n    const gl = helper.getGL();\n    const tile = this.tile;\n\n    this.textures.length = 0;\n\n    /**\n     * @type {import(\"../DataTile.js\").Data}\n     */\n    let data;\n\n    if (tile instanceof ImageTile || tile instanceof ReprojTile) {\n      data = tile.getImage();\n    } else {\n      data = tile.getData();\n    }\n\n    const image = asImageLike(data);\n    if (image) {\n      const texture = gl.createTexture();\n      this.textures.push(texture);\n      this.bandCount = 4;\n      uploadImageTexture(gl, texture, image, tile.interpolate);\n      this.setReady();\n      return;\n    }\n\n    data = asArrayLike(data);\n\n    const sourceTileSize = /** @type {DataTile} */ (tile).getSize();\n    const pixelSize = [\n      sourceTileSize[0] + 2 * this.gutter_,\n      sourceTileSize[1] + 2 * this.gutter_,\n    ];\n    const isFloat = data instanceof Float32Array;\n    const pixelCount = pixelSize[0] * pixelSize[1];\n    const DataType = isFloat ? Float32Array : Uint8Array;\n    const bytesPerElement = DataType.BYTES_PER_ELEMENT;\n    const bytesPerRow = data.byteLength / pixelSize[1];\n\n    this.bandCount = Math.floor(bytesPerRow / bytesPerElement / pixelSize[0]);\n    const textureCount = Math.ceil(this.bandCount / 4);\n\n    if (textureCount === 1) {\n      const texture = gl.createTexture();\n      this.textures.push(texture);\n      uploadDataTexture(\n        helper,\n        texture,\n        data,\n        pixelSize,\n        this.bandCount,\n        tile.interpolate\n      );\n      this.setReady();\n      return;\n    }\n\n    const textureDataArrays = new Array(textureCount);\n    for (let textureIndex = 0; textureIndex < textureCount; ++textureIndex) {\n      const texture = gl.createTexture();\n      this.textures.push(texture);\n\n      const bandCount =\n        textureIndex < textureCount - 1 ? 4 : ((this.bandCount - 1) % 4) + 1;\n      textureDataArrays[textureIndex] = new DataType(pixelCount * bandCount);\n    }\n\n    let dataIndex = 0;\n    let rowOffset = 0;\n    const colCount = pixelSize[0] * this.bandCount;\n    for (let rowIndex = 0; rowIndex < pixelSize[1]; ++rowIndex) {\n      for (let colIndex = 0; colIndex < colCount; ++colIndex) {\n        const dataValue = data[rowOffset + colIndex];\n\n        const pixelIndex = Math.floor(dataIndex / this.bandCount);\n        const bandIndex = colIndex % this.bandCount;\n        const textureIndex = Math.floor(bandIndex / 4);\n        const textureData = textureDataArrays[textureIndex];\n        const bandCount = textureData.length / pixelCount;\n        const textureBandIndex = bandIndex % 4;\n        textureData[pixelIndex * bandCount + textureBandIndex] = dataValue;\n\n        ++dataIndex;\n      }\n      rowOffset += bytesPerRow / bytesPerElement;\n    }\n\n    for (let textureIndex = 0; textureIndex < textureCount; ++textureIndex) {\n      const texture = this.textures[textureIndex];\n      const textureData = textureDataArrays[textureIndex];\n      const bandCount = textureData.length / pixelCount;\n      uploadDataTexture(\n        helper,\n        texture,\n        textureData,\n        pixelSize,\n        bandCount,\n        tile.interpolate\n      );\n    }\n\n    this.setReady();\n  }\n\n  disposeInternal() {\n    const gl = this.helper_.getGL();\n    this.helper_.deleteBuffer(this.coords);\n    for (let i = 0; i < this.textures.length; ++i) {\n      gl.deleteTexture(this.textures[i]);\n    }\n    this.tile.removeEventListener(EventType.CHANGE, this.handleTileChange_);\n  }\n\n  /**\n   * @param {import(\"../DataTile.js\").ImageLike} image The image.\n   * @param {number} renderCol The column index (in rendered tile space).\n   * @param {number} renderRow The row index (in rendered tile space).\n   * @return {Uint8ClampedArray|null} The data.\n   * @private\n   */\n  getImagePixelData_(image, renderCol, renderRow) {\n    const gutter = this.gutter_;\n    const renderWidth = this.renderSize_[0];\n    const renderHeight = this.renderSize_[1];\n\n    if (!pixelContext) {\n      createPixelContext();\n    }\n    pixelContext.clearRect(0, 0, 1, 1);\n\n    const sourceWidth = image.width;\n    const sourceHeight = image.height;\n\n    const sourceWidthWithoutGutter = sourceWidth - 2 * gutter;\n    const sourceHeightWithoutGutter = sourceHeight - 2 * gutter;\n\n    const sourceCol =\n      gutter + Math.floor(sourceWidthWithoutGutter * (renderCol / renderWidth));\n\n    const sourceRow =\n      gutter +\n      Math.floor(sourceHeightWithoutGutter * (renderRow / renderHeight));\n\n    let data;\n    try {\n      pixelContext.drawImage(image, sourceCol, sourceRow, 1, 1, 0, 0, 1, 1);\n      data = pixelContext.getImageData(0, 0, 1, 1).data;\n    } catch (err) {\n      pixelContext = null;\n      return null;\n    }\n    return data;\n  }\n\n  /**\n   * @param {import(\"../DataTile.js\").ArrayLike} data The data.\n   * @param {import(\"../size.js\").Size} sourceSize The size.\n   * @param {number} renderCol The column index (in rendered tile space).\n   * @param {number} renderRow The row index (in rendered tile space).\n   * @return {import(\"../DataTile.js\").ArrayLike|null} The data.\n   * @private\n   */\n  getArrayPixelData_(data, sourceSize, renderCol, renderRow) {\n    const gutter = this.gutter_;\n    const renderWidth = this.renderSize_[0];\n    const renderHeight = this.renderSize_[1];\n\n    const sourceWidthWithoutGutter = sourceSize[0];\n    const sourceHeightWithoutGutter = sourceSize[1];\n    const sourceWidth = sourceWidthWithoutGutter + 2 * gutter;\n    const sourceHeight = sourceHeightWithoutGutter + 2 * gutter;\n\n    const sourceCol =\n      gutter + Math.floor(sourceWidthWithoutGutter * (renderCol / renderWidth));\n\n    const sourceRow =\n      gutter +\n      Math.floor(sourceHeightWithoutGutter * (renderRow / renderHeight));\n\n    if (data instanceof DataView) {\n      const bytesPerPixel = data.byteLength / (sourceWidth * sourceHeight);\n      const offset = bytesPerPixel * (sourceRow * sourceWidth + sourceCol);\n      const buffer = data.buffer.slice(offset, offset + bytesPerPixel);\n      return new DataView(buffer);\n    }\n\n    const offset = this.bandCount * (sourceRow * sourceWidth + sourceCol);\n    return data.slice(offset, offset + this.bandCount);\n  }\n\n  /**\n   * Get data for a pixel.  If the tile is not loaded, null is returned.\n   * @param {number} renderCol The column index (in rendered tile space).\n   * @param {number} renderRow The row index (in rendered tile space).\n   * @return {import(\"../DataTile.js\").ArrayLike|null} The data.\n   */\n  getPixelData(renderCol, renderRow) {\n    if (!this.loaded) {\n      return null;\n    }\n\n    if (this.tile instanceof DataTile) {\n      const data = this.tile.getData();\n      const arrayData = asArrayLike(data);\n      if (arrayData) {\n        const sourceSize = this.tile.getSize();\n        return this.getArrayPixelData_(\n          arrayData,\n          sourceSize,\n          renderCol,\n          renderRow\n        );\n      }\n      return this.getImagePixelData_(asImageLike(data), renderCol, renderRow);\n    }\n\n    return this.getImagePixelData_(this.tile.getImage(), renderCol, renderRow);\n  }\n}\n\nexport default TileTexture;\n","/**\n * @module ol/renderer/webgl/Layer\n */\nimport LayerProperty from '../../layer/Property.js';\nimport LayerRenderer from '../Layer.js';\nimport RenderEvent from '../../render/Event.js';\nimport RenderEventType from '../../render/EventType.js';\nimport WebGLHelper from '../../webgl/Helper.js';\nimport {\n  compose as composeTransform,\n  create as createTransform,\n} from '../../transform.js';\n\n/**\n * @typedef {Object} PostProcessesOptions\n * @property {number} [scaleRatio] Scale ratio; if < 1, the post process will render to a texture smaller than\n * the main canvas that will then be sampled up (useful for saving resource on blur steps).\n * @property {string} [vertexShader] Vertex shader source\n * @property {string} [fragmentShader] Fragment shader source\n * @property {Object<string,import(\"../../webgl/Helper\").UniformValue>} [uniforms] Uniform definitions for the post process step\n */\n\n/**\n * @typedef {Object} Options\n * @property {Object<string,import(\"../../webgl/Helper\").UniformValue>} [uniforms] Uniform definitions for the post process steps\n * @property {Array<PostProcessesOptions>} [postProcesses] Post-processes definitions\n */\n\n/**\n * @classdesc\n * Base WebGL renderer class.\n * Holds all logic related to data manipulation & some common rendering logic\n * @template {import(\"../../layer/Layer.js\").default} LayerType\n * @extends {LayerRenderer<LayerType>}\n */\nclass WebGLLayerRenderer extends LayerRenderer {\n  /**\n   * @param {LayerType} layer Layer.\n   * @param {Options} [options] Options.\n   */\n  constructor(layer, options) {\n    super(layer);\n\n    options = options || {};\n\n    /**\n     * The transform for viewport CSS pixels to rendered pixels.  This transform is only\n     * set before dispatching rendering events.\n     * @private\n     * @type {import(\"../../transform.js\").Transform}\n     */\n    this.inversePixelTransform_ = createTransform();\n\n    /**\n     * @private\n     * @type {CanvasRenderingContext2D}\n     */\n    this.pixelContext_ = null;\n\n    /**\n     * @private\n     */\n    this.postProcesses_ = options.postProcesses;\n\n    /**\n     * @private\n     */\n    this.uniforms_ = options.uniforms;\n\n    /**\n     * @type {WebGLHelper}\n     * @protected\n     */\n    this.helper;\n\n    layer.addChangeListener(LayerProperty.MAP, this.removeHelper.bind(this));\n\n    this.dispatchPreComposeEvent = this.dispatchPreComposeEvent.bind(this);\n    this.dispatchPostComposeEvent = this.dispatchPostComposeEvent.bind(this);\n  }\n\n  /**\n   * @param {WebGLRenderingContext} context The WebGL rendering context.\n   * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n   * @protected\n   */\n  dispatchPreComposeEvent(context, frameState) {\n    const layer = this.getLayer();\n    if (layer.hasListener(RenderEventType.PRECOMPOSE)) {\n      const event = new RenderEvent(\n        RenderEventType.PRECOMPOSE,\n        undefined,\n        frameState,\n        context\n      );\n      layer.dispatchEvent(event);\n    }\n  }\n\n  /**\n   * @param {WebGLRenderingContext} context The WebGL rendering context.\n   * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n   * @protected\n   */\n  dispatchPostComposeEvent(context, frameState) {\n    const layer = this.getLayer();\n    if (layer.hasListener(RenderEventType.POSTCOMPOSE)) {\n      const event = new RenderEvent(\n        RenderEventType.POSTCOMPOSE,\n        undefined,\n        frameState,\n        context\n      );\n      layer.dispatchEvent(event);\n    }\n  }\n\n  /**\n   * Reset options (only handles uniforms).\n   * @param {Options} options Options.\n   */\n  reset(options) {\n    this.uniforms_ = options.uniforms;\n    if (this.helper) {\n      this.helper.setUniforms(this.uniforms_);\n    }\n  }\n\n  /**\n   * @protected\n   */\n  removeHelper() {\n    if (this.helper) {\n      this.helper.dispose();\n      delete this.helper;\n    }\n  }\n\n  /**\n   * Determine whether renderFrame should be called.\n   * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n   * @return {boolean} Layer is ready to be rendered.\n   */\n  prepareFrame(frameState) {\n    if (this.getLayer().getRenderSource()) {\n      let incrementGroup = true;\n      let groupNumber = -1;\n      let className;\n      for (let i = 0, ii = frameState.layerStatesArray.length; i < ii; i++) {\n        const layer = frameState.layerStatesArray[i].layer;\n        const renderer = layer.getRenderer();\n        if (!(renderer instanceof WebGLLayerRenderer)) {\n          incrementGroup = true;\n          continue;\n        }\n        const layerClassName = layer.getClassName();\n        if (incrementGroup || layerClassName !== className) {\n          groupNumber += 1;\n          incrementGroup = false;\n        }\n        className = layerClassName;\n        if (renderer === this) {\n          break;\n        }\n      }\n\n      const canvasCacheKey =\n        'map/' + frameState.mapId + '/group/' + groupNumber;\n\n      if (!this.helper || !this.helper.canvasCacheKeyMatches(canvasCacheKey)) {\n        this.removeHelper();\n\n        this.helper = new WebGLHelper({\n          postProcesses: this.postProcesses_,\n          uniforms: this.uniforms_,\n          canvasCacheKey: canvasCacheKey,\n        });\n\n        if (className) {\n          this.helper.getCanvas().className = className;\n        }\n\n        this.afterHelperCreated();\n      }\n    }\n\n    return this.prepareFrameInternal(frameState);\n  }\n\n  /**\n   * @protected\n   */\n  afterHelperCreated() {}\n\n  /**\n   * Determine whether renderFrame should be called.\n   * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n   * @return {boolean} Layer is ready to be rendered.\n   * @protected\n   */\n  prepareFrameInternal(frameState) {\n    return true;\n  }\n\n  /**\n   * Clean up.\n   */\n  disposeInternal() {\n    this.removeHelper();\n    super.disposeInternal();\n  }\n\n  /**\n   * @param {import(\"../../render/EventType.js\").default} type Event type.\n   * @param {WebGLRenderingContext} context The rendering context.\n   * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n   * @private\n   */\n  dispatchRenderEvent_(type, context, frameState) {\n    const layer = this.getLayer();\n    if (layer.hasListener(type)) {\n      composeTransform(\n        this.inversePixelTransform_,\n        0,\n        0,\n        frameState.pixelRatio,\n        -frameState.pixelRatio,\n        0,\n        0,\n        -frameState.size[1]\n      );\n\n      const event = new RenderEvent(\n        type,\n        this.inversePixelTransform_,\n        frameState,\n        context\n      );\n      layer.dispatchEvent(event);\n    }\n  }\n\n  /**\n   * @param {WebGLRenderingContext} context The rendering context.\n   * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n   * @protected\n   */\n  preRender(context, frameState) {\n    this.dispatchRenderEvent_(RenderEventType.PRERENDER, context, frameState);\n  }\n\n  /**\n   * @param {WebGLRenderingContext} context The rendering context.\n   * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n   * @protected\n   */\n  postRender(context, frameState) {\n    this.dispatchRenderEvent_(RenderEventType.POSTRENDER, context, frameState);\n  }\n}\n\nexport default WebGLLayerRenderer;\n","/**\n * @module ol/renderer/webgl/TileLayerBase\n */\nimport LRUCache from '../../structs/LRUCache.js';\nimport ReprojDataTile from '../../reproj/DataTile.js';\nimport ReprojTile from '../../reproj/Tile.js';\nimport TileRange from '../../TileRange.js';\nimport TileState from '../../TileState.js';\nimport WebGLLayerRenderer from './Layer.js';\nimport {abstract, getUid} from '../../util.js';\nimport {ascending} from '../../array.js';\nimport {create as createMat4} from '../../vec/mat4.js';\nimport {\n  createOrUpdate as createTileCoord,\n  getKey as getTileCoordKey,\n} from '../../tilecoord.js';\nimport {\n  create as createTransform,\n  reset as resetTransform,\n  rotate as rotateTransform,\n  scale as scaleTransform,\n  translate as translateTransform,\n} from '../../transform.js';\nimport {fromUserExtent} from '../../proj.js';\nimport {getIntersection, isEmpty} from '../../extent.js';\nimport {toSize} from '../../size.js';\n\nexport const Uniforms = {\n  TILE_TRANSFORM: 'u_tileTransform',\n  TRANSITION_ALPHA: 'u_transitionAlpha',\n  DEPTH: 'u_depth',\n  RENDER_EXTENT: 'u_renderExtent', // intersection of layer, source, and view extent\n  RESOLUTION: 'u_resolution',\n  ZOOM: 'u_zoom',\n  GLOBAL_ALPHA: 'u_globalAlpha',\n  PROJECTION_MATRIX: 'u_projectionMatrix',\n  SCREEN_TO_WORLD_MATRIX: 'u_screenToWorldMatrix',\n};\n\n/**\n * @type {Object<string, boolean>}\n */\nconst empty = {};\n\n/**\n * Transform a zoom level into a depth value ranging from -1 to 1.\n * @param {number} z A zoom level.\n * @return {number} A depth value.\n */\nfunction depthForZ(z) {\n  return 2 * (1 - 1 / (z + 1)) - 1;\n}\n\n/**\n * @typedef {import(\"../../webgl/BaseTileRepresentation.js\").default<import(\"../../Tile.js\").default>} AbstractTileRepresentation\n */\n/**\n * @typedef {Object} TileRepresentationLookup\n * @property {Set<string>} tileIds The set of tile ids in the lookup.\n * @property {Object<number, Set<AbstractTileRepresentation>>} representationsByZ Tile representations by zoom level.\n */\n\n/**\n * @return {TileRepresentationLookup} A new tile representation lookup.\n */\nexport function newTileRepresentationLookup() {\n  return {tileIds: new Set(), representationsByZ: {}};\n}\n\n/**\n * Check if a tile is already in the tile representation lookup.\n * @param {TileRepresentationLookup} tileRepresentationLookup Lookup of tile representations by zoom level.\n * @param {import(\"../../Tile.js\").default} tile A tile.\n * @return {boolean} The tile is already in the lookup.\n */\nfunction lookupHasTile(tileRepresentationLookup, tile) {\n  return tileRepresentationLookup.tileIds.has(getUid(tile));\n}\n\n/**\n * Add a tile representation to the lookup.\n * @param {TileRepresentationLookup} tileRepresentationLookup Lookup of tile representations by zoom level.\n * @param {AbstractTileRepresentation} tileRepresentation A tile representation.\n * @param {number} z The zoom level.\n */\nfunction addTileRepresentationToLookup(\n  tileRepresentationLookup,\n  tileRepresentation,\n  z\n) {\n  const representationsByZ = tileRepresentationLookup.representationsByZ;\n  if (!(z in representationsByZ)) {\n    representationsByZ[z] = new Set();\n  }\n  representationsByZ[z].add(tileRepresentation);\n  tileRepresentationLookup.tileIds.add(getUid(tileRepresentation.tile));\n}\n\n/**\n * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n * @param {import(\"../../extent.js\").Extent} extent The frame extent.\n * @return {import(\"../../extent.js\").Extent} Frame extent intersected with layer extents.\n */\nfunction getRenderExtent(frameState, extent) {\n  const layerState = frameState.layerStatesArray[frameState.layerIndex];\n  if (layerState.extent) {\n    extent = getIntersection(\n      extent,\n      fromUserExtent(layerState.extent, frameState.viewState.projection)\n    );\n  }\n  const source = /** @type {import(\"../../source/Tile.js\").default} */ (\n    layerState.layer.getRenderSource()\n  );\n  if (!source.getWrapX()) {\n    const gridExtent = source\n      .getTileGridForProjection(frameState.viewState.projection)\n      .getExtent();\n    if (gridExtent) {\n      extent = getIntersection(extent, gridExtent);\n    }\n  }\n  return extent;\n}\n\nexport function getCacheKey(source, tileCoord) {\n  return `${source.getKey()},${getTileCoordKey(tileCoord)}`;\n}\n\n/**\n * @typedef {Object} Options\n * @property {Object<string, import(\"../../webgl/Helper\").UniformValue>} [uniforms] Additional uniforms\n * made available to shaders.\n * @property {number} [cacheSize=512] The tile representation cache size.\n * @property {Array<import('./Layer.js').PostProcessesOptions>} [postProcesses] Post-processes definitions.\n */\n\n/**\n * @typedef {import(\"../../layer/BaseTile.js\").default} BaseLayerType\n */\n\n/**\n * @classdesc\n * Base WebGL renderer for tile layers.\n * @template {BaseLayerType} LayerType\n * @template {import(\"../../Tile.js\").default} TileType\n * @template {import(\"../../webgl/BaseTileRepresentation.js\").default<TileType>} TileRepresentation\n * @extends {WebGLLayerRenderer<LayerType>}\n */\nclass WebGLBaseTileLayerRenderer extends WebGLLayerRenderer {\n  /**\n   * @param {LayerType} tileLayer Tile layer.\n   * @param {Options} options Options.\n   */\n  constructor(tileLayer, options) {\n    super(tileLayer, {\n      uniforms: options.uniforms,\n      postProcesses: options.postProcesses,\n    });\n\n    /**\n     * The last call to `renderFrame` was completed with all tiles loaded\n     * @type {boolean}\n     */\n    this.renderComplete = false;\n\n    /**\n     * This transform converts representation coordinates to screen coordinates.\n     * @type {import(\"../../transform.js\").Transform}\n     * @private\n     */\n    this.tileTransform_ = createTransform();\n\n    /**\n     * @type {Array<number>}\n     * @protected\n     */\n    this.tempMat4 = createMat4();\n\n    /**\n     * @type {import(\"../../TileRange.js\").default}\n     * @private\n     */\n    this.tempTileRange_ = new TileRange(0, 0, 0, 0);\n\n    /**\n     * @type {import(\"../../tilecoord.js\").TileCoord}\n     * @private\n     */\n    this.tempTileCoord_ = createTileCoord(0, 0, 0);\n\n    /**\n     * @type {import(\"../../size.js\").Size}\n     * @private\n     */\n    this.tempSize_ = [0, 0];\n\n    const cacheSize = options.cacheSize !== undefined ? options.cacheSize : 512;\n    /**\n     * @type {import(\"../../structs/LRUCache.js\").default<TileRepresentation>}\n     * @protected\n     */\n    this.tileRepresentationCache = new LRUCache(cacheSize);\n\n    /**\n     * @protected\n     * @type {import(\"../../Map.js\").FrameState|null}\n     */\n    this.frameState = null;\n\n    /**\n     * @private\n     * @type {import(\"../../proj/Projection.js\").default}\n     */\n    this.projection_ = undefined;\n  }\n\n  /**\n   * @param {Options} options Options.\n   */\n  reset(options) {\n    super.reset({\n      uniforms: options.uniforms,\n    });\n  }\n\n  /**\n   * @param {TileType} tile Tile.\n   * @return {boolean} Tile is drawable.\n   * @private\n   */\n  isDrawableTile_(tile) {\n    const tileLayer = this.getLayer();\n    const tileState = tile.getState();\n    const useInterimTilesOnError = tileLayer.getUseInterimTilesOnError();\n    return (\n      tileState == TileState.LOADED ||\n      tileState == TileState.EMPTY ||\n      (tileState == TileState.ERROR && !useInterimTilesOnError)\n    );\n  }\n\n  /**\n   * Determine whether renderFrame should be called.\n   * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n   * @return {boolean} Layer is ready to be rendered.\n   */\n  prepareFrameInternal(frameState) {\n    if (!this.projection_) {\n      this.projection_ = frameState.viewState.projection;\n    } else if (frameState.viewState.projection !== this.projection_) {\n      this.clearCache();\n      this.projection_ = frameState.viewState.projection;\n    }\n\n    const layer = this.getLayer();\n    const source = layer.getRenderSource();\n    if (!source) {\n      return false;\n    }\n\n    if (isEmpty(getRenderExtent(frameState, frameState.extent))) {\n      return false;\n    }\n    return source.getState() === 'ready';\n  }\n\n  /**\n   * @abstract\n   * @param {import(\"../../webgl/BaseTileRepresentation.js\").TileRepresentationOptions<TileType>} options tile representation options\n   * @return {TileRepresentation} A new tile representation\n   * @protected\n   */\n  createTileRepresentation(options) {\n    return abstract();\n  }\n\n  /**\n   * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n   * @param {import(\"../../extent.js\").Extent} extent The extent to be rendered.\n   * @param {number} initialZ The zoom level.\n   * @param {TileRepresentationLookup} tileRepresentationLookup The zoom level.\n   * @param {number} preload Number of additional levels to load.\n   */\n  enqueueTiles(\n    frameState,\n    extent,\n    initialZ,\n    tileRepresentationLookup,\n    preload\n  ) {\n    const viewState = frameState.viewState;\n    const tileLayer = this.getLayer();\n    const tileSource = tileLayer.getRenderSource();\n    const tileGrid = tileSource.getTileGridForProjection(viewState.projection);\n    const gutter = tileSource.getGutterForProjection(viewState.projection);\n\n    const tileSourceKey = getUid(tileSource);\n    if (!(tileSourceKey in frameState.wantedTiles)) {\n      frameState.wantedTiles[tileSourceKey] = {};\n    }\n\n    const wantedTiles = frameState.wantedTiles[tileSourceKey];\n    const tileRepresentationCache = this.tileRepresentationCache;\n\n    const map = tileLayer.getMapInternal();\n    const minZ = Math.max(\n      initialZ - preload,\n      tileGrid.getMinZoom(),\n      tileGrid.getZForResolution(\n        Math.min(\n          tileLayer.getMaxResolution(),\n          map\n            ? map\n                .getView()\n                .getResolutionForZoom(Math.max(tileLayer.getMinZoom(), 0))\n            : tileGrid.getResolution(0)\n        ),\n        tileSource.zDirection\n      )\n    );\n    for (let z = initialZ; z >= minZ; --z) {\n      const tileRange = tileGrid.getTileRangeForExtentAndZ(\n        extent,\n        z,\n        this.tempTileRange_\n      );\n\n      const tileResolution = tileGrid.getResolution(z);\n\n      for (let x = tileRange.minX; x <= tileRange.maxX; ++x) {\n        for (let y = tileRange.minY; y <= tileRange.maxY; ++y) {\n          const tileCoord = createTileCoord(z, x, y, this.tempTileCoord_);\n          const cacheKey = getCacheKey(tileSource, tileCoord);\n\n          /** @type {TileRepresentation} */\n          let tileRepresentation;\n\n          /** @type {TileType} */\n          let tile;\n\n          if (tileRepresentationCache.containsKey(cacheKey)) {\n            tileRepresentation = tileRepresentationCache.get(cacheKey);\n            tile = tileRepresentation.tile;\n          }\n          if (\n            !tileRepresentation ||\n            tileRepresentation.tile.key !== tileSource.getKey()\n          ) {\n            tile = tileSource.getTile(\n              z,\n              x,\n              y,\n              frameState.pixelRatio,\n              viewState.projection\n            );\n          }\n\n          if (lookupHasTile(tileRepresentationLookup, tile)) {\n            continue;\n          }\n\n          if (!tileRepresentation) {\n            tileRepresentation = this.createTileRepresentation({\n              tile: tile,\n              grid: tileGrid,\n              helper: this.helper,\n              gutter: gutter,\n            });\n            tileRepresentationCache.set(cacheKey, tileRepresentation);\n          } else {\n            if (this.isDrawableTile_(tile)) {\n              tileRepresentation.setTile(tile);\n            } else {\n              const interimTile = /** @type {TileType} */ (\n                tile.getInterimTile()\n              );\n              tileRepresentation.setTile(interimTile);\n            }\n          }\n\n          addTileRepresentationToLookup(\n            tileRepresentationLookup,\n            tileRepresentation,\n            z\n          );\n\n          const tileQueueKey = tile.getKey();\n          wantedTiles[tileQueueKey] = true;\n\n          if (tile.getState() === TileState.IDLE) {\n            if (!frameState.tileQueue.isKeyQueued(tileQueueKey)) {\n              frameState.tileQueue.enqueue([\n                tile,\n                tileSourceKey,\n                tileGrid.getTileCoordCenter(tileCoord),\n                tileResolution,\n              ]);\n            }\n          }\n        }\n      }\n    }\n  }\n\n  /**\n   * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n   * @param {boolean} tilesWithAlpha True if at least one of the rendered tiles has alpha\n   * @protected\n   */\n  beforeTilesRender(frameState, tilesWithAlpha) {\n    this.helper.prepareDraw(this.frameState, !tilesWithAlpha);\n  }\n\n  /**\n   * @param {TileRepresentation} tileRepresentation Tile representation\n   * @param {import(\"../../transform.js\").Transform} tileTransform Tile transform\n   * @param {import(\"../../Map.js\").FrameState} frameState Frame state\n   * @param {import(\"../../extent.js\").Extent} renderExtent Render extent\n   * @param {number} tileResolution Tile resolution\n   * @param {import(\"../../size.js\").Size} tileSize Tile size\n   * @param {import(\"../../coordinate.js\").Coordinate} tileOrigin Tile origin\n   * @param {import(\"../../extent.js\").Extent} tileExtent tile Extent\n   * @param {number} depth Depth\n   * @param {number} gutter Gutter\n   * @param {number} alpha Alpha\n   * @protected\n   */\n  renderTile(\n    tileRepresentation,\n    tileTransform,\n    frameState,\n    renderExtent,\n    tileResolution,\n    tileSize,\n    tileOrigin,\n    tileExtent,\n    depth,\n    gutter,\n    alpha\n  ) {}\n\n  /**\n   * Render the layer.\n   * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n   * @return {HTMLElement} The rendered element.\n   */\n  renderFrame(frameState) {\n    this.frameState = frameState;\n    this.renderComplete = true;\n    const gl = this.helper.getGL();\n    this.preRender(gl, frameState);\n\n    const viewState = frameState.viewState;\n    const tileLayer = this.getLayer();\n    const tileSource = tileLayer.getRenderSource();\n    const tileGrid = tileSource.getTileGridForProjection(viewState.projection);\n    const gutter = tileSource.getGutterForProjection(viewState.projection);\n    const extent = getRenderExtent(frameState, frameState.extent);\n    const z = tileGrid.getZForResolution(\n      viewState.resolution,\n      tileSource.zDirection\n    );\n\n    /**\n     * @type {TileRepresentationLookup}\n     */\n    const tileRepresentationLookup = newTileRepresentationLookup();\n\n    const preload = tileLayer.getPreload();\n    if (frameState.nextExtent) {\n      const targetZ = tileGrid.getZForResolution(\n        viewState.nextResolution,\n        tileSource.zDirection\n      );\n      const nextExtent = getRenderExtent(frameState, frameState.nextExtent);\n      this.enqueueTiles(\n        frameState,\n        nextExtent,\n        targetZ,\n        tileRepresentationLookup,\n        preload\n      );\n    }\n\n    this.enqueueTiles(frameState, extent, z, tileRepresentationLookup, 0);\n    if (preload > 0) {\n      setTimeout(() => {\n        this.enqueueTiles(\n          frameState,\n          extent,\n          z - 1,\n          tileRepresentationLookup,\n          preload - 1\n        );\n      }, 0);\n    }\n\n    /**\n     * A lookup of alpha values for tiles at the target rendering resolution\n     * for tiles that are in transition.  If a tile coord key is absent from\n     * this lookup, the tile should be rendered at alpha 1.\n     * @type {Object<string, number>}\n     */\n    const alphaLookup = {};\n\n    const uid = getUid(this);\n    const time = frameState.time;\n    let blend = false;\n\n    // look for cached tiles to use if a target tile is not ready\n    for (const tileRepresentation of tileRepresentationLookup\n      .representationsByZ[z]) {\n      const tile = tileRepresentation.tile;\n      if (\n        (tile instanceof ReprojTile || tile instanceof ReprojDataTile) &&\n        tile.getState() === TileState.EMPTY\n      ) {\n        continue;\n      }\n      const tileCoord = tile.tileCoord;\n\n      if (tileRepresentation.loaded) {\n        const alpha = tile.getAlpha(uid, time);\n        if (alpha === 1) {\n          // no need to look for alt tiles\n          tile.endTransition(uid);\n          continue;\n        }\n        blend = true;\n        const tileCoordKey = getTileCoordKey(tileCoord);\n        alphaLookup[tileCoordKey] = alpha;\n      }\n      this.renderComplete = false;\n\n      // first look for child tiles (at z + 1)\n      const coveredByChildren = this.findAltTiles_(\n        tileGrid,\n        tileCoord,\n        z + 1,\n        tileRepresentationLookup\n      );\n\n      if (coveredByChildren) {\n        continue;\n      }\n\n      // next look for parent tiles\n      const minZoom = tileGrid.getMinZoom();\n      for (let parentZ = z - 1; parentZ >= minZoom; --parentZ) {\n        const coveredByParent = this.findAltTiles_(\n          tileGrid,\n          tileCoord,\n          parentZ,\n          tileRepresentationLookup\n        );\n\n        if (coveredByParent) {\n          break;\n        }\n      }\n    }\n\n    this.beforeTilesRender(frameState, blend);\n\n    const representationsByZ = tileRepresentationLookup.representationsByZ;\n    const zs = Object.keys(representationsByZ).map(Number).sort(ascending);\n\n    for (let j = 0, jj = zs.length; j < jj; ++j) {\n      const tileZ = zs[j];\n      for (const tileRepresentation of representationsByZ[tileZ]) {\n        if (!tileRepresentation.loaded) {\n          continue;\n        }\n        const tile = tileRepresentation.tile;\n        const tileCoord = tile.tileCoord;\n        const tileCoordKey = getTileCoordKey(tileCoord);\n        const alpha =\n          tileCoordKey in alphaLookup ? alphaLookup[tileCoordKey] : 1;\n\n        if (alpha < 1) {\n          frameState.animate = true;\n        }\n\n        const tileResolution = tileGrid.getResolution(tileZ);\n        const tileSize = toSize(tileGrid.getTileSize(tileZ), this.tempSize_);\n        const tileOrigin = tileGrid.getOrigin(tileZ);\n        const tileExtent = tileGrid.getTileCoordExtent(tileCoord);\n        const depth = depthForZ(tileZ);\n\n        const viewState = frameState.viewState;\n        const centerX = viewState.center[0];\n        const centerY = viewState.center[1];\n\n        const tileWidthWithGutter = tileSize[0] + 2 * gutter;\n        const tileHeightWithGutter = tileSize[1] + 2 * gutter;\n\n        const aspectRatio = tileWidthWithGutter / tileHeightWithGutter;\n\n        const centerI =\n          (centerX - tileOrigin[0]) / (tileSize[0] * tileResolution);\n        const centerJ =\n          (tileOrigin[1] - centerY) / (tileSize[1] * tileResolution);\n\n        const tileScale = viewState.resolution / tileResolution;\n\n        const tileCenterI = tileCoord[1];\n        const tileCenterJ = tileCoord[2];\n\n        resetTransform(this.tileTransform_);\n        scaleTransform(\n          this.tileTransform_,\n          2 / ((frameState.size[0] * tileScale) / tileWidthWithGutter),\n          -2 / ((frameState.size[1] * tileScale) / tileWidthWithGutter)\n        );\n        rotateTransform(this.tileTransform_, viewState.rotation);\n        scaleTransform(this.tileTransform_, 1, 1 / aspectRatio);\n        translateTransform(\n          this.tileTransform_,\n          (tileSize[0] * (tileCenterI - centerI) - gutter) /\n            tileWidthWithGutter,\n          (tileSize[1] * (tileCenterJ - centerJ) - gutter) /\n            tileHeightWithGutter\n        );\n\n        this.renderTile(\n          /** @type {TileRepresentation} */ (tileRepresentation),\n          this.tileTransform_,\n          frameState,\n          extent,\n          tileResolution,\n          tileSize,\n          tileOrigin,\n          tileExtent,\n          depth,\n          gutter,\n          alpha\n        );\n      }\n    }\n\n    this.helper.finalizeDraw(\n      frameState,\n      this.dispatchPreComposeEvent,\n      this.dispatchPostComposeEvent\n    );\n\n    const canvas = this.helper.getCanvas();\n\n    const tileRepresentationCache = this.tileRepresentationCache;\n    while (tileRepresentationCache.canExpireCache()) {\n      const tileRepresentation = tileRepresentationCache.pop();\n      tileRepresentation.dispose();\n    }\n\n    // TODO: let the renderers manage their own cache instead of managing the source cache\n    /**\n     * Here we unconditionally expire the source cache since the renderer maintains\n     * its own cache.\n     * @param {import(\"../../Map.js\").default} map Map.\n     * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n     */\n    const postRenderFunction = function (map, frameState) {\n      tileSource.updateCacheSize(0.1, frameState.viewState.projection);\n      tileSource.expireCache(frameState.viewState.projection, empty);\n    };\n\n    frameState.postRenderFunctions.push(postRenderFunction);\n\n    this.postRender(gl, frameState);\n    return canvas;\n  }\n\n  /**\n   * Look for tiles covering the provided tile coordinate at an alternate\n   * zoom level.  Loaded tiles will be added to the provided tile representation lookup.\n   * @param {import(\"../../tilegrid/TileGrid.js\").default} tileGrid The tile grid.\n   * @param {import(\"../../tilecoord.js\").TileCoord} tileCoord The target tile coordinate.\n   * @param {number} altZ The alternate zoom level.\n   * @param {TileRepresentationLookup} tileRepresentationLookup Lookup of\n   * tile representations by zoom level.\n   * @return {boolean} The tile coordinate is covered by loaded tiles at the alternate zoom level.\n   * @private\n   */\n  findAltTiles_(tileGrid, tileCoord, altZ, tileRepresentationLookup) {\n    const tileRange = tileGrid.getTileRangeForTileCoordAndZ(\n      tileCoord,\n      altZ,\n      this.tempTileRange_\n    );\n\n    if (!tileRange) {\n      return false;\n    }\n\n    let covered = true;\n    const tileRepresentationCache = this.tileRepresentationCache;\n    const source = this.getLayer().getRenderSource();\n    for (let x = tileRange.minX; x <= tileRange.maxX; ++x) {\n      for (let y = tileRange.minY; y <= tileRange.maxY; ++y) {\n        const cacheKey = getCacheKey(source, [altZ, x, y]);\n        let loaded = false;\n        if (tileRepresentationCache.containsKey(cacheKey)) {\n          const tileRepresentation = tileRepresentationCache.get(cacheKey);\n          if (\n            tileRepresentation.loaded &&\n            !lookupHasTile(tileRepresentationLookup, tileRepresentation.tile)\n          ) {\n            addTileRepresentationToLookup(\n              tileRepresentationLookup,\n              tileRepresentation,\n              altZ\n            );\n            loaded = true;\n          }\n        }\n        if (!loaded) {\n          covered = false;\n        }\n      }\n    }\n    return covered;\n  }\n\n  clearCache() {\n    const tileRepresentationCache = this.tileRepresentationCache;\n    tileRepresentationCache.forEach((tileRepresentation) =>\n      tileRepresentation.dispose()\n    );\n    tileRepresentationCache.clear();\n  }\n\n  removeHelper() {\n    if (this.helper) {\n      this.clearCache();\n    }\n\n    super.removeHelper();\n  }\n\n  /**\n   * Clean up.\n   */\n  disposeInternal() {\n    super.disposeInternal();\n    delete this.frameState;\n  }\n}\n\nexport default WebGLBaseTileLayerRenderer;\n","/**\n * @module ol/renderer/webgl/TileLayer\n */\nimport ReprojDataTile from '../../reproj/DataTile.js';\nimport ReprojTile from '../../reproj/Tile.js';\nimport TileState from '../../TileState.js';\nimport TileTexture from '../../webgl/TileTexture.js';\nimport WebGLArrayBuffer from '../../webgl/Buffer.js';\nimport WebGLBaseTileLayerRenderer, {\n  Uniforms as BaseUniforms,\n  getCacheKey,\n} from './TileLayerBase.js';\nimport {AttributeType} from '../../webgl/Helper.js';\nimport {ELEMENT_ARRAY_BUFFER, STATIC_DRAW} from '../../webgl.js';\nimport {apply as applyTransform} from '../../transform.js';\nimport {\n  boundingExtent,\n  containsCoordinate,\n  getIntersection,\n} from '../../extent.js';\nimport {fromUserExtent} from '../../proj.js';\nimport {fromTransform as mat4FromTransform} from '../../vec/mat4.js';\nimport {toSize} from '../../size.js';\n\nexport const Uniforms = {\n  ...BaseUniforms,\n  TILE_TEXTURE_ARRAY: 'u_tileTextures',\n  TEXTURE_PIXEL_WIDTH: 'u_texturePixelWidth',\n  TEXTURE_PIXEL_HEIGHT: 'u_texturePixelHeight',\n  TEXTURE_RESOLUTION: 'u_textureResolution', // map units per texture pixel\n  TEXTURE_ORIGIN_X: 'u_textureOriginX', // map x coordinate of left edge of texture\n  TEXTURE_ORIGIN_Y: 'u_textureOriginY', // map y coordinate of top edge of texture\n};\n\nexport const Attributes = {\n  TEXTURE_COORD: 'a_textureCoord',\n};\n\n/**\n * @type {Array<import('../../webgl/Helper.js').AttributeDescription>}\n */\nconst attributeDescriptions = [\n  {\n    name: Attributes.TEXTURE_COORD,\n    size: 2,\n    type: AttributeType.FLOAT,\n  },\n];\n\n/**\n * @typedef {Object} Options\n * @property {string} vertexShader Vertex shader source.\n * @property {string} fragmentShader Fragment shader source.\n * @property {Object<string, import(\"../../webgl/Helper\").UniformValue>} [uniforms] Additional uniforms\n * made available to shaders.\n * @property {Array<import(\"../../webgl/PaletteTexture.js\").default>} [paletteTextures] Palette textures.\n * @property {number} [cacheSize=512] The texture cache size.\n */\n\n/**\n * @typedef {import(\"../../layer/WebGLTile.js\").default} LayerType\n */\n/**\n * @typedef {import(\"../../webgl/TileTexture.js\").TileType} TileTextureType\n */\n/**\n * @typedef {import(\"../../webgl/TileTexture.js\").default} TileTextureRepresentation\n */\n\n/**\n * @classdesc\n * WebGL renderer for tile layers.\n * @extends {WebGLBaseTileLayerRenderer<LayerType, TileTextureType, TileTextureRepresentation>}\n * @api\n */\nclass WebGLTileLayerRenderer extends WebGLBaseTileLayerRenderer {\n  /**\n   * @param {LayerType} tileLayer Tile layer.\n   * @param {Options} options Options.\n   */\n  constructor(tileLayer, options) {\n    super(tileLayer, options);\n\n    /**\n     * @type {WebGLProgram}\n     * @private\n     */\n    this.program_;\n\n    /**\n     * @private\n     */\n    this.vertexShader_ = options.vertexShader;\n\n    /**\n     * @private\n     */\n    this.fragmentShader_ = options.fragmentShader;\n\n    /**\n     * Tiles are rendered as a quad with the following structure:\n     *\n     *  [P3]---------[P2]\n     *   |`           |\n     *   |  `     B   |\n     *   |    `       |\n     *   |      `     |\n     *   |   A    `   |\n     *   |          ` |\n     *  [P0]---------[P1]\n     *\n     * Triangle A: P0, P1, P3\n     * Triangle B: P1, P2, P3\n     *\n     * @private\n     */\n    this.indices_ = new WebGLArrayBuffer(ELEMENT_ARRAY_BUFFER, STATIC_DRAW);\n    this.indices_.fromArray([0, 1, 3, 1, 2, 3]);\n\n    /**\n     * @type {Array<import(\"../../webgl/PaletteTexture.js\").default>}\n     * @private\n     */\n    this.paletteTextures_ = options.paletteTextures || [];\n  }\n\n  /**\n   * @param {Options} options Options.\n   */\n  reset(options) {\n    super.reset(options);\n\n    this.vertexShader_ = options.vertexShader;\n    this.fragmentShader_ = options.fragmentShader;\n\n    if (this.helper) {\n      this.program_ = this.helper.getProgram(\n        this.fragmentShader_,\n        this.vertexShader_\n      );\n    }\n  }\n\n  afterHelperCreated() {\n    this.program_ = this.helper.getProgram(\n      this.fragmentShader_,\n      this.vertexShader_\n    );\n    this.helper.flushBufferData(this.indices_);\n  }\n\n  createTileRepresentation(options) {\n    return new TileTexture(options);\n  }\n\n  beforeTilesRender(frameState, tilesWithAlpha) {\n    super.beforeTilesRender(frameState, tilesWithAlpha);\n    this.helper.useProgram(this.program_, frameState);\n  }\n\n  renderTile(\n    tileTexture,\n    tileTransform,\n    frameState,\n    renderExtent,\n    tileResolution,\n    tileSize,\n    tileOrigin,\n    tileExtent,\n    depth,\n    gutter,\n    alpha\n  ) {\n    const gl = this.helper.getGL();\n    this.helper.bindBuffer(tileTexture.coords);\n    this.helper.bindBuffer(this.indices_);\n    this.helper.enableAttributes(attributeDescriptions);\n\n    let textureSlot = 0;\n    while (textureSlot < tileTexture.textures.length) {\n      const uniformName = `${Uniforms.TILE_TEXTURE_ARRAY}[${textureSlot}]`;\n      this.helper.bindTexture(\n        tileTexture.textures[textureSlot],\n        textureSlot,\n        uniformName\n      );\n      ++textureSlot;\n    }\n\n    for (\n      let paletteIndex = 0;\n      paletteIndex < this.paletteTextures_.length;\n      ++paletteIndex\n    ) {\n      const paletteTexture = this.paletteTextures_[paletteIndex];\n      const texture = paletteTexture.getTexture(gl);\n      this.helper.bindTexture(texture, textureSlot, paletteTexture.name);\n      ++textureSlot;\n    }\n\n    const viewState = frameState.viewState;\n\n    const tileWidthWithGutter = tileSize[0] + 2 * gutter;\n    const tileHeightWithGutter = tileSize[1] + 2 * gutter;\n\n    const tile = tileTexture.tile;\n    const tileCoord = tile.tileCoord;\n\n    const tileCenterI = tileCoord[1];\n    const tileCenterJ = tileCoord[2];\n\n    this.helper.setUniformMatrixValue(\n      Uniforms.TILE_TRANSFORM,\n      mat4FromTransform(this.tempMat4, tileTransform)\n    );\n\n    this.helper.setUniformFloatValue(Uniforms.TRANSITION_ALPHA, alpha);\n    this.helper.setUniformFloatValue(Uniforms.DEPTH, depth);\n\n    let gutterExtent = renderExtent;\n    if (gutter > 0) {\n      gutterExtent = tileExtent;\n      getIntersection(gutterExtent, renderExtent, gutterExtent);\n    }\n    this.helper.setUniformFloatVec4(Uniforms.RENDER_EXTENT, gutterExtent);\n\n    this.helper.setUniformFloatValue(Uniforms.RESOLUTION, viewState.resolution);\n    this.helper.setUniformFloatValue(Uniforms.ZOOM, viewState.zoom);\n\n    this.helper.setUniformFloatValue(\n      Uniforms.TEXTURE_PIXEL_WIDTH,\n      tileWidthWithGutter\n    );\n    this.helper.setUniformFloatValue(\n      Uniforms.TEXTURE_PIXEL_HEIGHT,\n      tileHeightWithGutter\n    );\n    this.helper.setUniformFloatValue(\n      Uniforms.TEXTURE_RESOLUTION,\n      tileResolution\n    );\n    this.helper.setUniformFloatValue(\n      Uniforms.TEXTURE_ORIGIN_X,\n      tileOrigin[0] +\n        tileCenterI * tileSize[0] * tileResolution -\n        gutter * tileResolution\n    );\n    this.helper.setUniformFloatValue(\n      Uniforms.TEXTURE_ORIGIN_Y,\n      tileOrigin[1] -\n        tileCenterJ * tileSize[1] * tileResolution +\n        gutter * tileResolution\n    );\n\n    this.helper.drawElements(0, this.indices_.getSize());\n  }\n\n  /**\n   * @param {import(\"../../pixel.js\").Pixel} pixel Pixel.\n   * @return {Uint8ClampedArray|Uint8Array|Float32Array|DataView} Data at the pixel location.\n   */\n  getData(pixel) {\n    const gl = this.helper.getGL();\n    if (!gl) {\n      return null;\n    }\n\n    const frameState = this.frameState;\n    if (!frameState) {\n      return null;\n    }\n\n    const layer = this.getLayer();\n    const coordinate = applyTransform(\n      frameState.pixelToCoordinateTransform,\n      pixel.slice()\n    );\n\n    const viewState = frameState.viewState;\n    const layerExtent = layer.getExtent();\n    if (layerExtent) {\n      if (\n        !containsCoordinate(\n          fromUserExtent(layerExtent, viewState.projection),\n          coordinate\n        )\n      ) {\n        return null;\n      }\n    }\n\n    // determine last source suitable for rendering at coordinate\n    const sources = layer.getSources(\n      boundingExtent([coordinate]),\n      viewState.resolution\n    );\n    let i, source, tileGrid;\n    for (i = sources.length - 1; i >= 0; --i) {\n      source = sources[i];\n      if (source.getState() === 'ready') {\n        tileGrid = source.getTileGridForProjection(viewState.projection);\n        if (source.getWrapX()) {\n          break;\n        }\n        const gridExtent = tileGrid.getExtent();\n        if (!gridExtent || containsCoordinate(gridExtent, coordinate)) {\n          break;\n        }\n      }\n    }\n    if (i < 0) {\n      return null;\n    }\n\n    const tileTextureCache = this.tileRepresentationCache;\n    for (\n      let z = tileGrid.getZForResolution(viewState.resolution);\n      z >= tileGrid.getMinZoom();\n      --z\n    ) {\n      const tileCoord = tileGrid.getTileCoordForCoordAndZ(coordinate, z);\n      const cacheKey = getCacheKey(source, tileCoord);\n      if (!tileTextureCache.containsKey(cacheKey)) {\n        continue;\n      }\n      const tileTexture = tileTextureCache.get(cacheKey);\n      const tile = tileTexture.tile;\n      if (\n        (tile instanceof ReprojTile || tile instanceof ReprojDataTile) &&\n        tile.getState() === TileState.EMPTY\n      ) {\n        return null;\n      }\n      if (!tileTexture.loaded) {\n        continue;\n      }\n      const tileOrigin = tileGrid.getOrigin(z);\n      const tileSize = toSize(tileGrid.getTileSize(z));\n      const tileResolution = tileGrid.getResolution(z);\n\n      const col =\n        (coordinate[0] - tileOrigin[0]) / tileResolution -\n        tileCoord[1] * tileSize[0];\n\n      const row =\n        (tileOrigin[1] - coordinate[1]) / tileResolution -\n        tileCoord[2] * tileSize[1];\n\n      return tileTexture.getPixelData(col, row);\n    }\n    return null;\n  }\n\n  /**\n   * Clean up.\n   */\n  disposeInternal() {\n    const helper = this.helper;\n    if (helper) {\n      const gl = helper.getGL();\n      gl.deleteProgram(this.program_);\n      delete this.program_;\n      helper.deleteBuffer(this.indices_);\n    }\n    super.disposeInternal();\n    delete this.indices_;\n  }\n}\n\nexport default WebGLTileLayerRenderer;\n","/**\n * Operators and utilities used for style expressions\n * @module ol/style/expressions\n */\n\nimport PaletteTexture from '../webgl/PaletteTexture.js';\nimport {Uniforms} from '../renderer/webgl/TileLayer.js';\nimport {asArray, fromString, isStringColor} from '../color.js';\n\n/**\n * Base type used for literal style parameters; can be a number literal or the output of an operator,\n * which in turns takes {@link import(\"./expressions.js\").ExpressionValue} arguments.\n *\n * The following operators can be used:\n *\n * * Reading operators:\n *   * `['band', bandIndex, xOffset, yOffset]` For tile layers only. Fetches pixel values from band\n *     `bandIndex` of the source's data. The first `bandIndex` of the source data is `1`. Fetched values\n *     are in the 0..1 range. {@link import(\"../source/TileImage.js\").default} sources have 4 bands: red,\n *     green, blue and alpha. {@link import(\"../source/DataTile.js\").default} sources can have any number\n *     of bands, depending on the underlying data source and\n *     {@link import(\"../source/GeoTIFF.js\").Options configuration}. `xOffset` and `yOffset` are optional\n *     and allow specifying pixel offsets for x and y. This is used for sampling data from neighboring pixels.\n *   * `['get', 'attributeName', typeHint]` fetches a feature property value, similar to `feature.get('attributeName')`\n *     A type hint can optionally be specified, in case the resulting expression contains a type ambiguity which\n *     will make it invalid. Type hints can be one of: 'string', 'color', 'number', 'boolean', 'number[]'\n *   * `['geometry-type']` returns a feature's geometry type as string, either: 'LineString', 'Point' or 'Polygon'\n *     `Multi*` values are returned as their singular equivalent\n *     `Circle` geometries are returned as 'Polygon'\n *     `GeometryCollection` geometries are returned as the type of the first geometry found in the collection\n *   * `['resolution']` returns the current resolution\n *   * `['time']` returns the time in seconds since the creation of the layer\n *   * `['var', 'varName']` fetches a value from the style variables; will throw an error if that variable is undefined\n *   * `['zoom']` returns the current zoom level\n *\n * * Math operators:\n *   * `['*', value1, value2]` multiplies `value1` by `value2` (either numbers or colors)\n *   * `['/', value1, value2]` divides `value1` by `value2`\n *   * `['+', value1, value2]` adds `value1` and `value2`\n *   * `['-', value1, value2]` subtracts `value2` from `value1`\n *   * `['clamp', value, low, high]` clamps `value` between `low` and `high`\n *   * `['%', value1, value2]` returns the result of `value1 % value2` (modulo)\n *   * `['^', value1, value2]` returns the value of `value1` raised to the `value2` power\n *   * `['abs', value1]` returns the absolute value of `value1`\n *   * `['floor', value1]` returns the nearest integer less than or equal to `value1`\n *   * `['round', value1]` returns the nearest integer to `value1`\n *   * `['ceil', value1]` returns the nearest integer greater than or equal to `value1`\n *   * `['sin', value1]` returns the sine of `value1`\n *   * `['cos', value1]` returns the cosine of `value1`\n *   * `['atan', value1, value2]` returns `atan2(value1, value2)`. If `value2` is not provided, returns `atan(value1)`\n *   * `['sqrt', value1]` returns the square root of `value1`\n *\n * * Transform operators:\n *   * `['case', condition1, output1, ...conditionN, outputN, fallback]` selects the first output whose corresponding\n *     condition evaluates to `true`. If no match is found, returns the `fallback` value.\n *     All conditions should be `boolean`, output and fallback can be any kind.\n *   * `['match', input, match1, output1, ...matchN, outputN, fallback]` compares the `input` value against all\n *     provided `matchX` values, returning the output associated with the first valid match. If no match is found,\n *     returns the `fallback` value.\n *     `input` and `matchX` values must all be of the same type, and can be `number` or `string`. `outputX` and\n *     `fallback` values must be of the same type, and can be of any kind.\n *   * `['interpolate', interpolation, input, stop1, output1, ...stopN, outputN]` returns a value by interpolating between\n *     pairs of inputs and outputs; `interpolation` can either be `['linear']` or `['exponential', base]` where `base` is\n *     the rate of increase from stop A to stop B (i.e. power to which the interpolation ratio is raised); a value\n *     of 1 is equivalent to `['linear']`.\n *     `input` and `stopX` values must all be of type `number`. `outputX` values can be `number` or `color` values.\n *     Note: `input` will be clamped between `stop1` and `stopN`, meaning that all output values will be comprised\n *     between `output1` and `outputN`.\n *\n * * Logical operators:\n *   * `['<', value1, value2]` returns `true` if `value1` is strictly lower than `value2`, or `false` otherwise.\n *   * `['<=', value1, value2]` returns `true` if `value1` is lower than or equals `value2`, or `false` otherwise.\n *   * `['>', value1, value2]` returns `true` if `value1` is strictly greater than `value2`, or `false` otherwise.\n *   * `['>=', value1, value2]` returns `true` if `value1` is greater than or equals `value2`, or `false` otherwise.\n *   * `['==', value1, value2]` returns `true` if `value1` equals `value2`, or `false` otherwise.\n *   * `['!=', value1, value2]` returns `true` if `value1` does not equal `value2`, or `false` otherwise.\n *   * `['!', value1]` returns `false` if `value1` is `true` or greater than `0`, or `true` otherwise.\n *   * `['all', value1, value2, ...]` returns `true` if all the inputs are `true`, `false` otherwise.\n *   * `['any', value1, value2, ...]` returns `true` if any of the inputs are `true`, `false` otherwise.\n *   * `['between', value1, value2, value3]` returns `true` if `value1` is contained between `value2` and `value3`\n *     (inclusively), or `false` otherwise.\n *   * `['in', needle, haystack]` returns `true` if `needle` is found in `haystack`, and\n *     `false` otherwise.\n *     This operator has the following limitations:\n *     * `haystack` has to be an array of numbers or strings (searching for a substring in a string is not supported yet)\n *     * Only literal arrays are supported as `haystack` for now; this means that `haystack` cannot be the result of an\n *     expression. If `haystack` is an array of strings, use the `literal` operator to disambiguate from an expression:\n *     `['literal', ['abc', 'def', 'ghi']]`\n *\n * * Conversion operators:\n *   * `['array', value1, ...valueN]` creates a numerical array from `number` values; please note that the amount of\n *     values can currently only be 2, 3 or 4.\n *   * `['color', red, green, blue, alpha]` creates a `color` value from `number` values; the `alpha` parameter is\n *     optional; if not specified, it will be set to 1.\n *     Note: `red`, `green` and `blue` components must be values between 0 and 255; `alpha` between 0 and 1.\n *   * `['palette', index, colors]` picks a `color` value from an array of colors using the given index; the `index`\n *     expression must evaluate to a number; the items in the `colors` array must be strings with hex colors\n *     (e.g. `'#86A136'`), colors using the rgba[a] functional notation (e.g. `'rgb(134, 161, 54)'` or `'rgba(134, 161, 54, 1)'`),\n *     named colors (e.g. `'red'`), or array literals with 3 ([r, g, b]) or 4 ([r, g, b, a]) values (with r, g, and b\n *     in the 0-255 range and a in the 0-1 range).\n *\n * Values can either be literals or another operator, as they will be evaluated recursively.\n * Literal values can be of the following types:\n * * `boolean`\n * * `number`\n * * `number[]` (number arrays can only have a length of 2, 3 or 4)\n * * `string`\n * * {@link module:ol/color~Color}\n *\n * @typedef {Array<*>|import(\"../color.js\").Color|string|number|boolean} ExpressionValue\n * @api\n */\n\n/**\n * Possible inferred types from a given value or expression.\n * Note: these are binary flags.\n * @enum {number}\n */\nexport const ValueTypes = {\n  NUMBER: 0b00001,\n  STRING: 0b00010,\n  COLOR: 0b00100,\n  BOOLEAN: 0b01000,\n  NUMBER_ARRAY: 0b10000,\n  ANY: 0b11111,\n  NONE: 0,\n};\n\n/**\n * @param {string} typeHint Type hint\n * @return {ValueTypes} Resulting value type (will be a single type)\n */\nfunction getTypeFromHint(typeHint) {\n  switch (typeHint) {\n    case 'string':\n      return ValueTypes.STRING;\n    case 'color':\n      return ValueTypes.COLOR;\n    case 'number':\n      return ValueTypes.NUMBER;\n    case 'boolean':\n      return ValueTypes.BOOLEAN;\n    case 'number[]':\n      return ValueTypes.NUMBER_ARRAY;\n    default:\n      throw new Error(`Unrecognized type hint: ${typeHint}`);\n  }\n}\n\n/**\n * An operator declaration must contain two methods: `getReturnType` which returns a type based on\n * the operator arguments, and `toGlsl` which returns a GLSL-compatible string.\n * Note: both methods can process arguments recursively.\n * @typedef {Object} Operator\n * @property {function(Array<ExpressionValue>): ValueTypes|number} getReturnType Returns one or several types\n * @property {function(ParsingContext, Array<ExpressionValue>, ValueTypes): string} toGlsl Returns a GLSL-compatible string\n * given a parsing context, an array of arguments and an expected type.\n * Note: the expected type can be a combination such as ValueTypes.NUMBER | ValueTypes.STRING or ValueTypes.ANY for instance\n */\n\n/**\n * Operator declarations\n * @type {Object<string, Operator>}\n */\nexport const Operators = {};\n\n/**\n * Returns the possible types for a given value (each type being a binary flag)\n * To test a value use e.g. `getValueType(v) & ValueTypes.BOOLEAN`\n * @param {ExpressionValue} value Value\n * @return {ValueTypes|number} Type or types inferred from the value\n */\nexport function getValueType(value) {\n  if (typeof value === 'number') {\n    return ValueTypes.NUMBER;\n  }\n  if (typeof value === 'boolean') {\n    return ValueTypes.BOOLEAN;\n  }\n  if (typeof value === 'string') {\n    if (isStringColor(value)) {\n      return ValueTypes.COLOR | ValueTypes.STRING;\n    }\n    return ValueTypes.STRING;\n  }\n  if (!Array.isArray(value)) {\n    throw new Error(`Unhandled value type: ${JSON.stringify(value)}`);\n  }\n  const valueArr = /** @type {Array<*>} */ (value);\n  const onlyNumbers = valueArr.every(function (v) {\n    return typeof v === 'number';\n  });\n  if (onlyNumbers) {\n    if (valueArr.length === 3 || valueArr.length === 4) {\n      return ValueTypes.COLOR | ValueTypes.NUMBER_ARRAY;\n    }\n    return ValueTypes.NUMBER_ARRAY;\n  }\n  if (typeof valueArr[0] !== 'string') {\n    throw new Error(\n      `Expected an expression operator but received: ${JSON.stringify(\n        valueArr\n      )}`\n    );\n  }\n  const operator = Operators[valueArr[0]];\n  if (operator === undefined) {\n    throw new Error(\n      `Unrecognized expression operator: ${JSON.stringify(valueArr)}`\n    );\n  }\n  return operator.getReturnType(valueArr.slice(1));\n}\n\n/**\n * Checks if only one value type is enabled in the input number.\n * @param {ValueTypes|number} valueType Number containing value type binary flags\n * @return {boolean} True if only one type flag is enabled, false if zero or multiple\n */\nexport function isTypeUnique(valueType) {\n  return Math.log2(valueType) % 1 === 0;\n}\n\n/**\n * Print types as a readable string\n * @param {ValueTypes|number} valueType Number containing value type binary flags\n * @return {string} Types\n */\nfunction printTypes(valueType) {\n  const result = [];\n  if ((valueType & ValueTypes.NUMBER) > 0) {\n    result.push('number');\n  }\n  if ((valueType & ValueTypes.COLOR) > 0) {\n    result.push('color');\n  }\n  if ((valueType & ValueTypes.BOOLEAN) > 0) {\n    result.push('boolean');\n  }\n  if ((valueType & ValueTypes.NUMBER_ARRAY) > 0) {\n    result.push('number[]');\n  }\n  if ((valueType & ValueTypes.STRING) > 0) {\n    result.push('string');\n  }\n  return result.length > 0 ? result.join(', ') : '(no type)';\n}\n\n/**\n * @typedef {Object} ParsingContextExternal\n * @property {string} name Name, unprefixed\n * @property {ValueTypes} type One of the value types constants\n * @property {function(import(\"../Feature.js\").FeatureLike): *} [callback] Function used for computing the attribute value;\n *   if undefined, `feature.get(attribute.name)` will be used\n */\n\n/**\n * Context available during the parsing of an expression.\n * @typedef {Object} ParsingContext\n * @property {boolean} [inFragmentShader] If false, means the expression output should be made for a vertex shader\n * @property {Array<ParsingContextExternal>} variables External variables used in the expression\n * @property {Array<ParsingContextExternal>} attributes External attributes used in the expression\n * @property {Object<string, number>} stringLiteralsMap This object maps all encountered string values to a number\n * @property {Object<string, string>} functions Lookup of functions used by the style.\n * @property {number} [bandCount] Number of bands per pixel.\n * @property {Array<PaletteTexture>} [paletteTextures] List of palettes used by the style.\n * @property {import(\"../style/literal\").LiteralStyle} style The style being parsed\n */\n\n/**\n * @param {string} operator Operator\n * @param {ParsingContext} context Parsing context\n * @return {string} A function name based on the operator, unique in the given context\n */\nfunction computeOperatorFunctionName(operator, context) {\n  return `operator_${operator}_${Object.keys(context.functions).length}`;\n}\n\n/**\n * Will return the number as a float with a dot separator, which is required by GLSL.\n * @param {number} v Numerical value.\n * @return {string} The value as string.\n */\nexport function numberToGlsl(v) {\n  const s = v.toString();\n  return s.includes('.') ? s : s + '.0';\n}\n\n/**\n * Will return the number array as a float with a dot separator, concatenated with ', '.\n * @param {Array<number>} array Numerical values array.\n * @return {string} The array as a vector, e. g.: `vec3(1.0, 2.0, 3.0)`.\n */\nexport function arrayToGlsl(array) {\n  if (array.length < 2 || array.length > 4) {\n    throw new Error(\n      '`formatArray` can only output `vec2`, `vec3` or `vec4` arrays.'\n    );\n  }\n  return `vec${array.length}(${array.map(numberToGlsl).join(', ')})`;\n}\n\n/**\n * Will normalize and converts to string a `vec4` color array compatible with GLSL.\n * @param {string|import(\"../color.js\").Color} color Color either in string format or [r, g, b, a] array format,\n * with RGB components in the 0..255 range and the alpha component in the 0..1 range.\n * Note that the final array will always have 4 components.\n * @return {string} The color expressed in the `vec4(1.0, 1.0, 1.0, 1.0)` form.\n */\nexport function colorToGlsl(color) {\n  const array = asArray(color);\n  const alpha = array.length > 3 ? array[3] : 1;\n  // all components are premultiplied with alpha value\n  return arrayToGlsl([\n    (array[0] / 255) * alpha,\n    (array[1] / 255) * alpha,\n    (array[2] / 255) * alpha,\n    alpha,\n  ]);\n}\n\n/**\n * Returns a stable equivalent number for the string literal.\n * @param {ParsingContext} context Parsing context\n * @param {string} string String literal value\n * @return {number} Number equivalent\n */\nexport function getStringNumberEquivalent(context, string) {\n  if (context.stringLiteralsMap[string] === undefined) {\n    context.stringLiteralsMap[string] = Object.keys(\n      context.stringLiteralsMap\n    ).length;\n  }\n  return context.stringLiteralsMap[string];\n}\n\n/**\n * Returns a stable equivalent number for the string literal, for use in shaders. This number is then\n * converted to be a GLSL-compatible string.\n * @param {ParsingContext} context Parsing context\n * @param {string} string String literal value\n * @return {string} GLSL-compatible string containing a number\n */\nexport function stringToGlsl(context, string) {\n  return numberToGlsl(getStringNumberEquivalent(context, string));\n}\n\n/**\n * Recursively parses a style expression and outputs a GLSL-compatible string. Takes in a parsing context that\n * will be read and modified during the parsing operation.\n * @param {ParsingContext} context Parsing context\n * @param {ExpressionValue} value Value\n * @param {ValueTypes|number} [expectedType] Expected final type (can be several types combined)\n * If omitted, defaults to ValueTypes.NUMBER\n * @return {string} GLSL-compatible output\n */\nexport function expressionToGlsl(context, value, expectedType) {\n  const returnType =\n    expectedType !== undefined ? expectedType : ValueTypes.NUMBER;\n  // operator\n  if (Array.isArray(value) && typeof value[0] === 'string') {\n    const operator = Operators[value[0]];\n    if (operator === undefined) {\n      throw new Error(\n        `Unrecognized expression operator: ${JSON.stringify(value)}`\n      );\n    }\n    return operator.toGlsl(context, value.slice(1), returnType);\n  }\n\n  const possibleType = getValueType(value) & returnType;\n  assertNotEmptyType(value, possibleType, '');\n\n  if ((possibleType & ValueTypes.NUMBER) > 0) {\n    return numberToGlsl(/** @type {number} */ (value));\n  }\n\n  if ((possibleType & ValueTypes.BOOLEAN) > 0) {\n    return value.toString();\n  }\n\n  if ((possibleType & ValueTypes.STRING) > 0) {\n    return stringToGlsl(context, value.toString());\n  }\n\n  if ((possibleType & ValueTypes.COLOR) > 0) {\n    return colorToGlsl(/** @type {Array<number> | string} */ (value));\n  }\n\n  if ((possibleType & ValueTypes.NUMBER_ARRAY) > 0) {\n    return arrayToGlsl(/** @type {Array<number>} */ (value));\n  }\n\n  throw new Error(\n    `Unexpected expression ${value} (expected type ${printTypes(returnType)})`\n  );\n}\n\nfunction assertNumber(value) {\n  if ((getValueType(value) & ValueTypes.NUMBER) === 0) {\n    throw new Error(\n      `A numeric value was expected, got ${JSON.stringify(value)} instead`\n    );\n  }\n}\nfunction assertNumbers(values) {\n  for (let i = 0; i < values.length; i++) {\n    assertNumber(values[i]);\n  }\n}\nfunction assertString(value) {\n  if ((getValueType(value) & ValueTypes.STRING) === 0) {\n    throw new Error(\n      `A string value was expected, got ${JSON.stringify(value)} instead`\n    );\n  }\n}\nfunction assertBoolean(value) {\n  if ((getValueType(value) & ValueTypes.BOOLEAN) === 0) {\n    throw new Error(\n      `A boolean value was expected, got ${JSON.stringify(value)} instead`\n    );\n  }\n}\nfunction assertArgsCount(args, count) {\n  if (args.length !== count) {\n    throw new Error(\n      `Exactly ${count} arguments were expected, got ${args.length} instead`\n    );\n  }\n}\nfunction assertArgsMinCount(args, count) {\n  if (args.length < count) {\n    throw new Error(\n      `At least ${count} arguments were expected, got ${args.length} instead`\n    );\n  }\n}\nfunction assertArgsMaxCount(args, count) {\n  if (args.length > count) {\n    throw new Error(\n      `At most ${count} arguments were expected, got ${args.length} instead`\n    );\n  }\n}\nfunction assertArgsEven(args) {\n  if (args.length % 2 !== 0) {\n    throw new Error(\n      `An even amount of arguments was expected, got ${JSON.stringify(\n        args\n      )} instead`\n    );\n  }\n}\nfunction assertArgsOdd(args) {\n  if (args.length % 2 === 0) {\n    throw new Error(\n      `An odd amount of arguments was expected, got ${JSON.stringify(\n        args\n      )} instead`\n    );\n  }\n}\nfunction assertNotEmptyType(args, types, descriptor) {\n  if (types === ValueTypes.NONE) {\n    throw new Error(\n      `No matching type was found for the following expression ${descriptor}: ${JSON.stringify(\n        args\n      )}`\n    );\n  }\n}\nfunction assertSingleType(args, types, descriptor) {\n  assertNotEmptyType(args, types, descriptor);\n  if (!isTypeUnique(types)) {\n    throw new Error(\n      `Expected to have a unique type for the following expression ${descriptor}: ${JSON.stringify(\n        args\n      )}\nGot the following types instead: ${printTypes(types)}`\n    );\n  }\n}\nfunction assertOfType(args, types, expectedTypes, descriptor) {\n  if ((types & expectedTypes) === ValueTypes.NONE) {\n    throw new Error(\n      `Expected the ${descriptor} type of the following expression: ${JSON.stringify(\n        args\n      )} to be of the following types: ${printTypes(expectedTypes)}\nGot these types instead: ${printTypes(types)}`\n    );\n  }\n}\n\nOperators['get'] = {\n  getReturnType: function (args) {\n    if (args.length === 2) {\n      const hint = args[1];\n      return getTypeFromHint(/** @type {string} */ (hint));\n    }\n    return ValueTypes.ANY;\n  },\n  toGlsl: function (context, args, expectedType) {\n    assertArgsMinCount(args, 1);\n    assertArgsMaxCount(args, 2);\n    assertString(args[0]);\n    const outputType = expectedType & Operators['get'].getReturnType(args);\n    assertSingleType(['get', ...args], outputType, '');\n    const name = args[0].toString();\n    const existing = context.attributes.find((a) => a.name === name);\n    if (!existing) {\n      context.attributes.push({\n        name: name,\n        type: outputType,\n      });\n    } else if (outputType !== existing.type) {\n      throw new Error(\n        `The following attribute was used in different places with incompatible types: ${name}\nTypes were: ${printTypes(existing.type)} and ${printTypes(outputType)}`\n      );\n    }\n    const prefix = context.inFragmentShader ? 'v_' : 'a_';\n    return prefix + name;\n  },\n};\n\n/**\n * Get the uniform name given a variable name.\n * @param {string} variableName The variable name.\n * @return {string} The uniform name.\n */\nexport function uniformNameForVariable(variableName) {\n  return 'u_var_' + variableName;\n}\n\nOperators['var'] = {\n  getReturnType: function () {\n    return ValueTypes.ANY;\n  },\n  toGlsl: function (context, args, expectedType) {\n    assertArgsCount(args, 1);\n    assertString(args[0]);\n    const name = args[0].toString();\n    if (\n      !context.style.variables ||\n      context.style.variables[name] === undefined\n    ) {\n      throw new Error(\n        `The following variable is missing from the style: ${name}`\n      );\n    }\n    const initialValue = context.style.variables[name];\n    const outputType = expectedType & getValueType(initialValue);\n    assertSingleType(['var', ...args], outputType, '');\n    const existing = context.variables.find((a) => a.name === name);\n    if (!existing) {\n      context.variables.push({\n        name: name,\n        type: outputType,\n      });\n    } else if (outputType !== existing.type) {\n      throw new Error(\n        `The following variable was used in different places with incompatible types: ${name}\nTypes were: ${printTypes(existing.type)} and ${printTypes(outputType)}`\n      );\n    }\n    return uniformNameForVariable(name);\n  },\n};\n\nexport const PALETTE_TEXTURE_ARRAY = 'u_paletteTextures';\n\n// ['palette', index, colors]\nOperators['palette'] = {\n  getReturnType: function () {\n    return ValueTypes.COLOR;\n  },\n  toGlsl: function (context, args) {\n    assertArgsCount(args, 2);\n    assertNumber(args[0]);\n    const index = expressionToGlsl(context, args[0]);\n    const colors = args[1];\n    if (!Array.isArray(colors)) {\n      throw new Error('The second argument of palette must be an array');\n    }\n    const numColors = colors.length;\n    const palette = new Uint8Array(numColors * 4);\n    for (let i = 0; i < numColors; i++) {\n      const candidate = colors[i];\n      /**\n       * @type {import('../color.js').Color}\n       */\n      let color;\n      if (typeof candidate === 'string') {\n        color = fromString(candidate);\n      } else {\n        if (!Array.isArray(candidate)) {\n          throw new Error(\n            'The second argument of palette must be an array of strings or colors'\n          );\n        }\n        const length = candidate.length;\n        if (length === 4) {\n          color = candidate;\n        } else {\n          if (length !== 3) {\n            throw new Error(\n              `Expected palette color to have 3 or 4 values, got ${length}`\n            );\n          }\n          color = [candidate[0], candidate[1], candidate[2], 1];\n        }\n      }\n      const offset = i * 4;\n      palette[offset] = color[0];\n      palette[offset + 1] = color[1];\n      palette[offset + 2] = color[2];\n      palette[offset + 3] = color[3] * 255;\n    }\n    if (!context.paletteTextures) {\n      context.paletteTextures = [];\n    }\n    const paletteName = `${PALETTE_TEXTURE_ARRAY}[${context.paletteTextures.length}]`;\n    const paletteTexture = new PaletteTexture(paletteName, palette);\n    context.paletteTextures.push(paletteTexture);\n    return `texture2D(${paletteName}, vec2((${index} + 0.5) / ${numColors}.0, 0.5))`;\n  },\n};\n\nconst GET_BAND_VALUE_FUNC = 'getBandValue';\n\nOperators['band'] = {\n  getReturnType: function () {\n    return ValueTypes.NUMBER;\n  },\n  toGlsl: function (context, args) {\n    assertArgsMinCount(args, 1);\n    assertArgsMaxCount(args, 3);\n    const band = args[0];\n\n    if (!(GET_BAND_VALUE_FUNC in context.functions)) {\n      let ifBlocks = '';\n      const bandCount = context.bandCount || 1;\n      for (let i = 0; i < bandCount; i++) {\n        const colorIndex = Math.floor(i / 4);\n        let bandIndex = i % 4;\n        if (i === bandCount - 1 && bandIndex === 1) {\n          // LUMINANCE_ALPHA - band 1 assigned to rgb and band 2 assigned to alpha\n          bandIndex = 3;\n        }\n        const textureName = `${Uniforms.TILE_TEXTURE_ARRAY}[${colorIndex}]`;\n        ifBlocks += `\n          if (band == ${i + 1}.0) {\n            return texture2D(${textureName}, v_textureCoord + vec2(dx, dy))[${bandIndex}];\n          }\n        `;\n      }\n\n      context.functions[GET_BAND_VALUE_FUNC] = `\n        float getBandValue(float band, float xOffset, float yOffset) {\n          float dx = xOffset / ${Uniforms.TEXTURE_PIXEL_WIDTH};\n          float dy = yOffset / ${Uniforms.TEXTURE_PIXEL_HEIGHT};\n          ${ifBlocks}\n        }\n      `;\n    }\n\n    const bandExpression = expressionToGlsl(context, band);\n    const xOffsetExpression = expressionToGlsl(context, args[1] || 0);\n    const yOffsetExpression = expressionToGlsl(context, args[2] || 0);\n    return `${GET_BAND_VALUE_FUNC}(${bandExpression}, ${xOffsetExpression}, ${yOffsetExpression})`;\n  },\n};\n\nOperators['time'] = {\n  getReturnType: function () {\n    return ValueTypes.NUMBER;\n  },\n  toGlsl: function (context, args) {\n    assertArgsCount(args, 0);\n    return 'u_time';\n  },\n};\n\nOperators['zoom'] = {\n  getReturnType: function () {\n    return ValueTypes.NUMBER;\n  },\n  toGlsl: function (context, args) {\n    assertArgsCount(args, 0);\n    return 'u_zoom';\n  },\n};\n\nOperators['resolution'] = {\n  getReturnType: function () {\n    return ValueTypes.NUMBER;\n  },\n  toGlsl: function (context, args) {\n    assertArgsCount(args, 0);\n    return 'u_resolution';\n  },\n};\n\nOperators['geometry-type'] = {\n  getReturnType: function () {\n    return ValueTypes.STRING;\n  },\n  toGlsl: function (context, args) {\n    assertArgsCount(args, 0);\n    const name = 'geometryType';\n    const computeType = (geometry) => {\n      const type = geometry.getType();\n      switch (type) {\n        case 'Point':\n        case 'LineString':\n        case 'Polygon':\n          return type;\n        case 'MultiPoint':\n        case 'MultiLineString':\n        case 'MultiPolygon':\n          return type.substring(5);\n        case 'Circle':\n          return 'Polygon';\n        case 'GeometryCollection':\n          return computeType(geometry.getGeometries()[0]);\n        default:\n      }\n    };\n    const existing = context.attributes.find((a) => a.name === name);\n    if (!existing) {\n      context.attributes.push({\n        name: name,\n        type: ValueTypes.STRING,\n        callback: (feature) => {\n          return computeType(feature.getGeometry());\n        },\n      });\n    }\n    const prefix = context.inFragmentShader ? 'v_' : 'a_';\n    return prefix + name;\n  },\n};\n\nOperators['*'] = {\n  getReturnType: function (args) {\n    let outputType = ValueTypes.NUMBER | ValueTypes.COLOR;\n    for (let i = 0; i < args.length; i++) {\n      outputType = outputType & getValueType(args[i]);\n    }\n    return outputType;\n  },\n  toGlsl: function (context, args, expectedType) {\n    assertArgsMinCount(args, 2);\n    let outputType = expectedType;\n    for (let i = 0; i < args.length; i++) {\n      outputType = outputType & getValueType(args[i]);\n    }\n    assertOfType(\n      args,\n      outputType,\n      ValueTypes.NUMBER | ValueTypes.COLOR,\n      'output'\n    );\n    return `(${args\n      .map((arg) => expressionToGlsl(context, arg, outputType))\n      .join(' * ')})`;\n  },\n};\n\nOperators['/'] = {\n  getReturnType: function () {\n    return ValueTypes.NUMBER;\n  },\n  toGlsl: function (context, args) {\n    assertArgsCount(args, 2);\n    assertNumbers(args);\n    return `(${expressionToGlsl(context, args[0])} / ${expressionToGlsl(\n      context,\n      args[1]\n    )})`;\n  },\n};\n\nOperators['+'] = {\n  getReturnType: function () {\n    return ValueTypes.NUMBER;\n  },\n  toGlsl: function (context, args) {\n    assertArgsMinCount(args, 2);\n    assertNumbers(args);\n    return `(${args.map((arg) => expressionToGlsl(context, arg)).join(' + ')})`;\n  },\n};\n\nOperators['-'] = {\n  getReturnType: function () {\n    return ValueTypes.NUMBER;\n  },\n  toGlsl: function (context, args) {\n    assertArgsCount(args, 2);\n    assertNumbers(args);\n    return `(${expressionToGlsl(context, args[0])} - ${expressionToGlsl(\n      context,\n      args[1]\n    )})`;\n  },\n};\n\nOperators['clamp'] = {\n  getReturnType: function () {\n    return ValueTypes.NUMBER;\n  },\n  toGlsl: function (context, args) {\n    assertArgsCount(args, 3);\n    assertNumbers(args);\n    const min = expressionToGlsl(context, args[1]);\n    const max = expressionToGlsl(context, args[2]);\n    return `clamp(${expressionToGlsl(context, args[0])}, ${min}, ${max})`;\n  },\n};\n\nOperators['%'] = {\n  getReturnType: function () {\n    return ValueTypes.NUMBER;\n  },\n  toGlsl: function (context, args) {\n    assertArgsCount(args, 2);\n    assertNumbers(args);\n    return `mod(${expressionToGlsl(context, args[0])}, ${expressionToGlsl(\n      context,\n      args[1]\n    )})`;\n  },\n};\n\nOperators['^'] = {\n  getReturnType: function () {\n    return ValueTypes.NUMBER;\n  },\n  toGlsl: function (context, args) {\n    assertArgsCount(args, 2);\n    assertNumbers(args);\n    return `pow(${expressionToGlsl(context, args[0])}, ${expressionToGlsl(\n      context,\n      args[1]\n    )})`;\n  },\n};\n\nOperators['abs'] = {\n  getReturnType: function () {\n    return ValueTypes.NUMBER;\n  },\n  toGlsl: function (context, args) {\n    assertArgsCount(args, 1);\n    assertNumbers(args);\n    return `abs(${expressionToGlsl(context, args[0])})`;\n  },\n};\n\nOperators['floor'] = {\n  getReturnType: function () {\n    return ValueTypes.NUMBER;\n  },\n  toGlsl: function (context, args) {\n    assertArgsCount(args, 1);\n    assertNumbers(args);\n    return `floor(${expressionToGlsl(context, args[0])})`;\n  },\n};\n\nOperators['round'] = {\n  getReturnType: function () {\n    return ValueTypes.NUMBER;\n  },\n  toGlsl: function (context, args) {\n    assertArgsCount(args, 1);\n    assertNumbers(args);\n    return `floor(${expressionToGlsl(context, args[0])} + 0.5)`;\n  },\n};\n\nOperators['ceil'] = {\n  getReturnType: function () {\n    return ValueTypes.NUMBER;\n  },\n  toGlsl: function (context, args) {\n    assertArgsCount(args, 1);\n    assertNumbers(args);\n    return `ceil(${expressionToGlsl(context, args[0])})`;\n  },\n};\n\nOperators['sin'] = {\n  getReturnType: function () {\n    return ValueTypes.NUMBER;\n  },\n  toGlsl: function (context, args) {\n    assertArgsCount(args, 1);\n    assertNumbers(args);\n    return `sin(${expressionToGlsl(context, args[0])})`;\n  },\n};\n\nOperators['cos'] = {\n  getReturnType: function () {\n    return ValueTypes.NUMBER;\n  },\n  toGlsl: function (context, args) {\n    assertArgsCount(args, 1);\n    assertNumbers(args);\n    return `cos(${expressionToGlsl(context, args[0])})`;\n  },\n};\n\nOperators['atan'] = {\n  getReturnType: function () {\n    return ValueTypes.NUMBER;\n  },\n  toGlsl: function (context, args) {\n    assertArgsMinCount(args, 1);\n    assertArgsMaxCount(args, 2);\n    assertNumbers(args);\n    return args.length === 2\n      ? `atan(${expressionToGlsl(context, args[0])}, ${expressionToGlsl(\n          context,\n          args[1]\n        )})`\n      : `atan(${expressionToGlsl(context, args[0])})`;\n  },\n};\n\nOperators['sqrt'] = {\n  getReturnType: function () {\n    return ValueTypes.NUMBER;\n  },\n  toGlsl: function (context, args) {\n    assertArgsCount(args, 1);\n    assertNumbers(args);\n    return `sqrt(${expressionToGlsl(context, args[0])})`;\n  },\n};\n\nOperators['>'] = {\n  getReturnType: function () {\n    return ValueTypes.BOOLEAN;\n  },\n  toGlsl: function (context, args) {\n    assertArgsCount(args, 2);\n    assertNumbers(args);\n    return `(${expressionToGlsl(context, args[0])} > ${expressionToGlsl(\n      context,\n      args[1]\n    )})`;\n  },\n};\n\nOperators['>='] = {\n  getReturnType: function () {\n    return ValueTypes.BOOLEAN;\n  },\n  toGlsl: function (context, args) {\n    assertArgsCount(args, 2);\n    assertNumbers(args);\n    return `(${expressionToGlsl(context, args[0])} >= ${expressionToGlsl(\n      context,\n      args[1]\n    )})`;\n  },\n};\n\nOperators['<'] = {\n  getReturnType: function () {\n    return ValueTypes.BOOLEAN;\n  },\n  toGlsl: function (context, args) {\n    assertArgsCount(args, 2);\n    assertNumbers(args);\n    return `(${expressionToGlsl(context, args[0])} < ${expressionToGlsl(\n      context,\n      args[1]\n    )})`;\n  },\n};\n\nOperators['<='] = {\n  getReturnType: function () {\n    return ValueTypes.BOOLEAN;\n  },\n  toGlsl: function (context, args) {\n    assertArgsCount(args, 2);\n    assertNumbers(args);\n    return `(${expressionToGlsl(context, args[0])} <= ${expressionToGlsl(\n      context,\n      args[1]\n    )})`;\n  },\n};\n\nfunction getEqualOperator(operator) {\n  return {\n    getReturnType: function () {\n      return ValueTypes.BOOLEAN;\n    },\n    toGlsl: function (context, args) {\n      assertArgsCount(args, 2);\n\n      // find common type\n      let type = ValueTypes.ANY;\n      for (let i = 0; i < args.length; i++) {\n        type &= getValueType(args[i]);\n      }\n      if (type === ValueTypes.NONE) {\n        throw new Error(\n          `All arguments should be of compatible type, got ${JSON.stringify(\n            args\n          )} instead`\n        );\n      }\n\n      // Since it's not possible to have color types here, we can leave it out\n      // This fixes issues in case the value type is ambiguously detected as a color (e.g. the string 'red')\n      type &= ~ValueTypes.COLOR;\n\n      return `(${expressionToGlsl(\n        context,\n        args[0],\n        type\n      )} ${operator} ${expressionToGlsl(context, args[1], type)})`;\n    },\n  };\n}\n\nOperators['=='] = getEqualOperator('==');\n\nOperators['!='] = getEqualOperator('!=');\n\nOperators['!'] = {\n  getReturnType: function () {\n    return ValueTypes.BOOLEAN;\n  },\n  toGlsl: function (context, args) {\n    assertArgsCount(args, 1);\n    assertBoolean(args[0]);\n    return `(!${expressionToGlsl(context, args[0], ValueTypes.BOOLEAN)})`;\n  },\n};\n\nfunction getDecisionOperator(operator) {\n  return {\n    getReturnType: function () {\n      return ValueTypes.BOOLEAN;\n    },\n    toGlsl: function (context, args) {\n      assertArgsMinCount(args, 2);\n      for (let i = 0; i < args.length; i++) {\n        assertBoolean(args[i]);\n      }\n      let result = args\n        .map((arg) => expressionToGlsl(context, arg, ValueTypes.BOOLEAN))\n        .join(` ${operator} `);\n      result = `(${result})`;\n      return result;\n    },\n  };\n}\n\nOperators['all'] = getDecisionOperator('&&');\n\nOperators['any'] = getDecisionOperator('||');\n\nOperators['between'] = {\n  getReturnType: function () {\n    return ValueTypes.BOOLEAN;\n  },\n  toGlsl: function (context, args) {\n    assertArgsCount(args, 3);\n    assertNumbers(args);\n    const min = expressionToGlsl(context, args[1]);\n    const max = expressionToGlsl(context, args[2]);\n    const value = expressionToGlsl(context, args[0]);\n    return `(${value} >= ${min} && ${value} <= ${max})`;\n  },\n};\n\nOperators['array'] = {\n  getReturnType: function () {\n    return ValueTypes.NUMBER_ARRAY;\n  },\n  toGlsl: function (context, args) {\n    assertArgsMinCount(args, 2);\n    assertArgsMaxCount(args, 4);\n    assertNumbers(args);\n    const parsedArgs = args.map(function (val) {\n      return expressionToGlsl(context, val);\n    });\n    return `vec${args.length}(${parsedArgs.join(', ')})`;\n  },\n};\n\nOperators['color'] = {\n  getReturnType: function () {\n    return ValueTypes.COLOR;\n  },\n  toGlsl: function (context, args) {\n    assertArgsMinCount(args, 3);\n    assertArgsMaxCount(args, 4);\n    assertNumbers(args);\n    const parsedArgs = args\n      .slice(0, 3)\n      .map((val) => `${expressionToGlsl(context, val)} / 255.0`);\n    if (args.length === 3) {\n      return `vec4(${parsedArgs.join(', ')}, 1.0)`;\n    }\n    const alpha = expressionToGlsl(context, args[3]);\n    return `(${alpha} * vec4(${parsedArgs.join(', ')}, 1.0))`;\n  },\n};\n\nOperators['interpolate'] = {\n  getReturnType: function (args) {\n    let type = ValueTypes.COLOR | ValueTypes.NUMBER;\n    for (let i = 3; i < args.length; i += 2) {\n      type = type & getValueType(args[i]);\n    }\n    return type;\n  },\n  toGlsl: function (context, args, expectedType) {\n    assertArgsEven(args);\n    assertArgsMinCount(args, 6);\n\n    // validate interpolation type\n    const type = args[0];\n    let interpolation;\n    switch (type[0]) {\n      case 'linear':\n        interpolation = 1;\n        break;\n      case 'exponential':\n        interpolation = type[1];\n        break;\n      default:\n        interpolation = null;\n    }\n    if (!interpolation) {\n      throw new Error(\n        `Invalid interpolation type for \"interpolate\" operator, received: ${JSON.stringify(\n          type\n        )}`\n      );\n    }\n\n    // compute input/output types\n    const inputType = ValueTypes.NUMBER;\n    const outputType =\n      Operators['interpolate'].getReturnType(args) & expectedType;\n    assertSingleType(['interpolate', ...args], outputType, 'output');\n\n    const input = expressionToGlsl(context, args[1], inputType);\n    const exponent = numberToGlsl(interpolation);\n\n    let result = '';\n    for (let i = 2; i < args.length - 2; i += 2) {\n      const stop1 = expressionToGlsl(context, args[i], inputType);\n      const output1 =\n        result || expressionToGlsl(context, args[i + 1], outputType);\n      const stop2 = expressionToGlsl(context, args[i + 2], inputType);\n      const output2 = expressionToGlsl(context, args[i + 3], outputType);\n      let ratio;\n      if (interpolation === 1) {\n        ratio = `(${input} - ${stop1}) / (${stop2} - ${stop1})`;\n      } else {\n        ratio = `(pow(${exponent}, (${input} - ${stop1})) - 1.0) / (pow(${exponent}, (${stop2} - ${stop1})) - 1.0)`;\n      }\n      result = `mix(${output1}, ${output2}, clamp(${ratio}, 0.0, 1.0))`;\n    }\n    return result;\n  },\n};\n\nOperators['match'] = {\n  getReturnType: function (args) {\n    let type = ValueTypes.ANY;\n    for (let i = 2; i < args.length; i += 2) {\n      type = type & getValueType(args[i]);\n    }\n    type = type & getValueType(args[args.length - 1]);\n    return type;\n  },\n  toGlsl: function (context, args, expectedType) {\n    assertArgsEven(args);\n    assertArgsMinCount(args, 4);\n\n    let inputType = getValueType(args[0]);\n    for (let i = 1; i < args.length - 1; i += 2) {\n      inputType = inputType & getValueType(args[i]);\n    }\n    assertOfType(\n      ['match', ...args],\n      inputType,\n      ValueTypes.STRING | ValueTypes.NUMBER | ValueTypes.BOOLEAN,\n      'input'\n    );\n    inputType =\n      (ValueTypes.STRING | ValueTypes.NUMBER | ValueTypes.BOOLEAN) & inputType;\n\n    const outputType = Operators['match'].getReturnType(args) & expectedType;\n    assertSingleType(['match', ...args], outputType, 'output');\n\n    const input = expressionToGlsl(context, args[0], inputType);\n    const fallback = expressionToGlsl(\n      context,\n      args[args.length - 1],\n      outputType\n    );\n    let result = null;\n    for (let i = args.length - 3; i >= 1; i -= 2) {\n      const match = expressionToGlsl(context, args[i], inputType);\n      const output = expressionToGlsl(context, args[i + 1], outputType);\n      result = `(${input} == ${match} ? ${output} : ${result || fallback})`;\n    }\n    return result;\n  },\n};\n\nOperators['case'] = {\n  getReturnType: function (args) {\n    let type = ValueTypes.ANY;\n    for (let i = 1; i < args.length; i += 2) {\n      type = type & getValueType(args[i]);\n    }\n    type = type & getValueType(args[args.length - 1]);\n    return type;\n  },\n  toGlsl: function (context, args, expectedType) {\n    assertArgsOdd(args);\n    assertArgsMinCount(args, 3);\n\n    const outputType = Operators['case'].getReturnType(args) & expectedType;\n    assertSingleType(['case', ...args], outputType, 'output');\n    for (let i = 0; i < args.length - 1; i += 2) {\n      assertBoolean(args[i]);\n    }\n\n    const fallback = expressionToGlsl(\n      context,\n      args[args.length - 1],\n      outputType\n    );\n    let result = null;\n    for (let i = args.length - 3; i >= 0; i -= 2) {\n      const condition = expressionToGlsl(context, args[i], ValueTypes.BOOLEAN);\n      const output = expressionToGlsl(context, args[i + 1], outputType);\n      result = `(${condition} ? ${output} : ${result || fallback})`;\n    }\n    return result;\n  },\n};\n\nOperators['in'] = {\n  getReturnType: function (args) {\n    return ValueTypes.BOOLEAN;\n  },\n  toGlsl: function (context, args) {\n    assertArgsCount(args, 2);\n    const needle = args[0];\n    let haystack = args[1];\n    if (!Array.isArray(haystack)) {\n      throw new Error(\n        `The \"in\" operator expects an array literal as its second argument.`\n      );\n    }\n    if (typeof haystack[0] === 'string') {\n      if (haystack[0] !== 'literal') {\n        throw new Error(\n          `For the \"in\" operator, a string array should be wrapped in a \"literal\" operator to disambiguate from expressions.`\n        );\n      }\n      if (!Array.isArray(haystack[1])) {\n        throw new Error(\n          `The \"in\" operator was provided a literal value which was not an array as second argument.`\n        );\n      }\n      haystack = haystack[1];\n    }\n\n    let inputType = getValueType(needle);\n    for (let i = 0; i < haystack.length - 1; i += 1) {\n      inputType = inputType & getValueType(haystack[i]);\n    }\n    assertOfType(\n      ['match', ...args],\n      inputType,\n      ValueTypes.STRING | ValueTypes.NUMBER | ValueTypes.BOOLEAN,\n      'input'\n    );\n    inputType =\n      (ValueTypes.STRING | ValueTypes.NUMBER | ValueTypes.BOOLEAN) & inputType;\n\n    const funcName = computeOperatorFunctionName('in', context);\n    const tests = [];\n    for (let i = 0; i < haystack.length; i += 1) {\n      tests.push(\n        `  if (inputValue == ${expressionToGlsl(\n          context,\n          haystack[i],\n          inputType\n        )}) { return true; }`\n      );\n    }\n    context.functions[funcName] = `bool ${funcName}(float inputValue) {\n${tests.join('\\n')}\n  return false;\n}`;\n    return `${funcName}(${expressionToGlsl(context, needle, inputType)})`;\n  },\n};\n","/**\n * @module ol/style/Image\n */\nimport {abstract} from '../util.js';\nimport {toSize} from '../size.js';\n\n/**\n * @typedef {Object} Options\n * @property {number} opacity Opacity.\n * @property {boolean} rotateWithView If the image should get rotated with the view.\n * @property {number} rotation Rotation.\n * @property {number|import(\"../size.js\").Size} scale Scale.\n * @property {Array<number>} displacement Displacement.\n * @property {\"declutter\"|\"obstacle\"|\"none\"|undefined} declutterMode Declutter mode: `declutter`, `obstacle`, 'none */\n\n/**\n * @classdesc\n * A base class used for creating subclasses and not instantiated in\n * apps. Base class for {@link module:ol/style/Icon~Icon}, {@link module:ol/style/Circle~CircleStyle} and\n * {@link module:ol/style/RegularShape~RegularShape}.\n * @abstract\n * @api\n */\nclass ImageStyle {\n  /**\n   * @param {Options} options Options.\n   */\n  constructor(options) {\n    /**\n     * @private\n     * @type {number}\n     */\n    this.opacity_ = options.opacity;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.rotateWithView_ = options.rotateWithView;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.rotation_ = options.rotation;\n\n    /**\n     * @private\n     * @type {number|import(\"../size.js\").Size}\n     */\n    this.scale_ = options.scale;\n\n    /**\n     * @private\n     * @type {import(\"../size.js\").Size}\n     */\n    this.scaleArray_ = toSize(options.scale);\n\n    /**\n     * @private\n     * @type {Array<number>}\n     */\n    this.displacement_ = options.displacement;\n\n    /**\n     * @private\n     * @type {\"declutter\"|\"obstacle\"|\"none\"|undefined}\n     */\n    this.declutterMode_ = options.declutterMode;\n  }\n\n  /**\n   * Clones the style.\n   * @return {ImageStyle} The cloned style.\n   * @api\n   */\n  clone() {\n    const scale = this.getScale();\n    return new ImageStyle({\n      opacity: this.getOpacity(),\n      scale: Array.isArray(scale) ? scale.slice() : scale,\n      rotation: this.getRotation(),\n      rotateWithView: this.getRotateWithView(),\n      displacement: this.getDisplacement().slice(),\n      declutterMode: this.getDeclutterMode(),\n    });\n  }\n\n  /**\n   * Get the symbolizer opacity.\n   * @return {number} Opacity.\n   * @api\n   */\n  getOpacity() {\n    return this.opacity_;\n  }\n\n  /**\n   * Determine whether the symbolizer rotates with the map.\n   * @return {boolean} Rotate with map.\n   * @api\n   */\n  getRotateWithView() {\n    return this.rotateWithView_;\n  }\n\n  /**\n   * Get the symoblizer rotation.\n   * @return {number} Rotation.\n   * @api\n   */\n  getRotation() {\n    return this.rotation_;\n  }\n\n  /**\n   * Get the symbolizer scale.\n   * @return {number|import(\"../size.js\").Size} Scale.\n   * @api\n   */\n  getScale() {\n    return this.scale_;\n  }\n\n  /**\n   * Get the symbolizer scale array.\n   * @return {import(\"../size.js\").Size} Scale array.\n   */\n  getScaleArray() {\n    return this.scaleArray_;\n  }\n\n  /**\n   * Get the displacement of the shape\n   * @return {Array<number>} Shape's center displacement\n   * @api\n   */\n  getDisplacement() {\n    return this.displacement_;\n  }\n\n  /**\n   * Get the declutter mode of the shape\n   * @return {\"declutter\"|\"obstacle\"|\"none\"|undefined} Shape's declutter mode\n   * @api\n   */\n  getDeclutterMode() {\n    return this.declutterMode_;\n  }\n\n  /**\n   * Get the anchor point in pixels. The anchor determines the center point for the\n   * symbolizer.\n   * @abstract\n   * @return {Array<number>} Anchor.\n   */\n  getAnchor() {\n    return abstract();\n  }\n\n  /**\n   * Get the image element for the symbolizer.\n   * @abstract\n   * @param {number} pixelRatio Pixel ratio.\n   * @return {HTMLCanvasElement|HTMLVideoElement|HTMLImageElement} Image element.\n   */\n  getImage(pixelRatio) {\n    return abstract();\n  }\n\n  /**\n   * @abstract\n   * @return {HTMLCanvasElement|HTMLVideoElement|HTMLImageElement} Image element.\n   */\n  getHitDetectionImage() {\n    return abstract();\n  }\n\n  /**\n   * Get the image pixel ratio.\n   * @param {number} pixelRatio Pixel ratio.\n   * @return {number} Pixel ratio.\n   */\n  getPixelRatio(pixelRatio) {\n    return 1;\n  }\n\n  /**\n   * @abstract\n   * @return {import(\"../ImageState.js\").default} Image state.\n   */\n  getImageState() {\n    return abstract();\n  }\n\n  /**\n   * @abstract\n   * @return {import(\"../size.js\").Size} Image size.\n   */\n  getImageSize() {\n    return abstract();\n  }\n\n  /**\n   * Get the origin of the symbolizer.\n   * @abstract\n   * @return {Array<number>} Origin.\n   */\n  getOrigin() {\n    return abstract();\n  }\n\n  /**\n   * Get the size of the symbolizer (in pixels).\n   * @abstract\n   * @return {import(\"../size.js\").Size} Size.\n   */\n  getSize() {\n    return abstract();\n  }\n\n  /**\n   * Set the displacement.\n   *\n   * @param {Array<number>} displacement Displacement.\n   * @api\n   */\n  setDisplacement(displacement) {\n    this.displacement_ = displacement;\n  }\n\n  /**\n   * Set the opacity.\n   *\n   * @param {number} opacity Opacity.\n   * @api\n   */\n  setOpacity(opacity) {\n    this.opacity_ = opacity;\n  }\n\n  /**\n   * Set whether to rotate the style with the view.\n   *\n   * @param {boolean} rotateWithView Rotate with map.\n   * @api\n   */\n  setRotateWithView(rotateWithView) {\n    this.rotateWithView_ = rotateWithView;\n  }\n\n  /**\n   * Set the rotation.\n   *\n   * @param {number} rotation Rotation.\n   * @api\n   */\n  setRotation(rotation) {\n    this.rotation_ = rotation;\n  }\n\n  /**\n   * Set the scale.\n   *\n   * @param {number|import(\"../size.js\").Size} scale Scale.\n   * @api\n   */\n  setScale(scale) {\n    this.scale_ = scale;\n    this.scaleArray_ = toSize(scale);\n  }\n\n  /**\n   * @abstract\n   * @param {function(import(\"../events/Event.js\").default): void} listener Listener function.\n   */\n  listenImageChange(listener) {\n    abstract();\n  }\n\n  /**\n   * Load not yet loaded URI.\n   * @abstract\n   */\n  load() {\n    abstract();\n  }\n\n  /**\n   * @abstract\n   * @param {function(import(\"../events/Event.js\").default): void} listener Listener function.\n   */\n  unlistenImageChange(listener) {\n    abstract();\n  }\n}\n\nexport default ImageStyle;\n","/**\n * @module ol/style/RegularShape\n */\n\nimport ImageState from '../ImageState.js';\nimport ImageStyle from './Image.js';\nimport {asArray} from '../color.js';\nimport {asColorLike} from '../colorlike.js';\nimport {createCanvasContext2D} from '../dom.js';\nimport {\n  defaultFillStyle,\n  defaultLineJoin,\n  defaultLineWidth,\n  defaultMiterLimit,\n  defaultStrokeStyle,\n} from '../render/canvas.js';\n\n/**\n * Specify radius for regular polygons, or radius1 and radius2 for stars.\n * @typedef {Object} Options\n * @property {import(\"./Fill.js\").default} [fill] Fill style.\n * @property {number} points Number of points for stars and regular polygons. In case of a polygon, the number of points\n * is the number of sides.\n * @property {number} [radius] Radius of a regular polygon.\n * @property {number} [radius1] First radius of a star. Ignored if radius is set.\n * @property {number} [radius2] Second radius of a star.\n * @property {number} [angle=0] Shape's angle in radians. A value of 0 will have one of the shape's points facing up.\n * @property {Array<number>} [displacement=[0, 0]] Displacement of the shape in pixels.\n * Positive values will shift the shape right and up.\n * @property {import(\"./Stroke.js\").default} [stroke] Stroke style.\n * @property {number} [rotation=0] Rotation in radians (positive rotation clockwise).\n * @property {boolean} [rotateWithView=false] Whether to rotate the shape with the view.\n * @property {number|import(\"../size.js\").Size} [scale=1] Scale. Unless two dimensional scaling is required a better\n * result may be obtained with appropriate settings for `radius`, `radius1` and `radius2`.\n * @property {\"declutter\"|\"obstacle\"|\"none\"|undefined} [declutterMode] Declutter mode.\n */\n\n/**\n * @typedef {Object} RenderOptions\n * @property {import(\"../colorlike.js\").ColorLike} [strokeStyle] StrokeStyle.\n * @property {number} strokeWidth StrokeWidth.\n * @property {number} size Size.\n * @property {Array<number>|null} lineDash LineDash.\n * @property {number} lineDashOffset LineDashOffset.\n * @property {CanvasLineJoin} lineJoin LineJoin.\n * @property {number} miterLimit MiterLimit.\n */\n\n/**\n * @classdesc\n * Set regular shape style for vector features. The resulting shape will be\n * a regular polygon when `radius` is provided, or a star when `radius1` and\n * `radius2` are provided.\n * @api\n */\nclass RegularShape extends ImageStyle {\n  /**\n   * @param {Options} options Options.\n   */\n  constructor(options) {\n    /**\n     * @type {boolean}\n     */\n    const rotateWithView =\n      options.rotateWithView !== undefined ? options.rotateWithView : false;\n\n    super({\n      opacity: 1,\n      rotateWithView: rotateWithView,\n      rotation: options.rotation !== undefined ? options.rotation : 0,\n      scale: options.scale !== undefined ? options.scale : 1,\n      displacement:\n        options.displacement !== undefined ? options.displacement : [0, 0],\n      declutterMode: options.declutterMode,\n    });\n\n    /**\n     * @private\n     * @type {Object<number, HTMLCanvasElement>}\n     */\n    this.canvas_ = undefined;\n\n    /**\n     * @private\n     * @type {HTMLCanvasElement}\n     */\n    this.hitDetectionCanvas_ = null;\n\n    /**\n     * @private\n     * @type {import(\"./Fill.js\").default}\n     */\n    this.fill_ = options.fill !== undefined ? options.fill : null;\n\n    /**\n     * @private\n     * @type {Array<number>}\n     */\n    this.origin_ = [0, 0];\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.points_ = options.points;\n\n    /**\n     * @protected\n     * @type {number}\n     */\n    this.radius_ =\n      options.radius !== undefined ? options.radius : options.radius1;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.radius2_ = options.radius2;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.angle_ = options.angle !== undefined ? options.angle : 0;\n\n    /**\n     * @private\n     * @type {import(\"./Stroke.js\").default}\n     */\n    this.stroke_ = options.stroke !== undefined ? options.stroke : null;\n\n    /**\n     * @private\n     * @type {import(\"../size.js\").Size}\n     */\n    this.size_ = null;\n\n    /**\n     * @private\n     * @type {RenderOptions}\n     */\n    this.renderOptions_ = null;\n\n    this.render();\n  }\n\n  /**\n   * Clones the style.\n   * @return {RegularShape} The cloned style.\n   * @api\n   */\n  clone() {\n    const scale = this.getScale();\n    const style = new RegularShape({\n      fill: this.getFill() ? this.getFill().clone() : undefined,\n      points: this.getPoints(),\n      radius: this.getRadius(),\n      radius2: this.getRadius2(),\n      angle: this.getAngle(),\n      stroke: this.getStroke() ? this.getStroke().clone() : undefined,\n      rotation: this.getRotation(),\n      rotateWithView: this.getRotateWithView(),\n      scale: Array.isArray(scale) ? scale.slice() : scale,\n      displacement: this.getDisplacement().slice(),\n      declutterMode: this.getDeclutterMode(),\n    });\n    style.setOpacity(this.getOpacity());\n    return style;\n  }\n\n  /**\n   * Get the anchor point in pixels. The anchor determines the center point for the\n   * symbolizer.\n   * @return {Array<number>} Anchor.\n   * @api\n   */\n  getAnchor() {\n    const size = this.size_;\n    if (!size) {\n      return null;\n    }\n    const displacement = this.getDisplacement();\n    const scale = this.getScaleArray();\n    // anchor is scaled by renderer but displacement should not be scaled\n    // so divide by scale here\n    return [\n      size[0] / 2 - displacement[0] / scale[0],\n      size[1] / 2 + displacement[1] / scale[1],\n    ];\n  }\n\n  /**\n   * Get the angle used in generating the shape.\n   * @return {number} Shape's rotation in radians.\n   * @api\n   */\n  getAngle() {\n    return this.angle_;\n  }\n\n  /**\n   * Get the fill style for the shape.\n   * @return {import(\"./Fill.js\").default} Fill style.\n   * @api\n   */\n  getFill() {\n    return this.fill_;\n  }\n\n  /**\n   * Set the fill style.\n   * @param {import(\"./Fill.js\").default} fill Fill style.\n   * @api\n   */\n  setFill(fill) {\n    this.fill_ = fill;\n    this.render();\n  }\n\n  /**\n   * @return {HTMLCanvasElement} Image element.\n   */\n  getHitDetectionImage() {\n    if (!this.hitDetectionCanvas_) {\n      this.createHitDetectionCanvas_(this.renderOptions_);\n    }\n    return this.hitDetectionCanvas_;\n  }\n\n  /**\n   * Get the image icon.\n   * @param {number} pixelRatio Pixel ratio.\n   * @return {HTMLCanvasElement} Image or Canvas element.\n   * @api\n   */\n  getImage(pixelRatio) {\n    let image = this.canvas_[pixelRatio];\n    if (!image) {\n      const renderOptions = this.renderOptions_;\n      const context = createCanvasContext2D(\n        renderOptions.size * pixelRatio,\n        renderOptions.size * pixelRatio\n      );\n      this.draw_(renderOptions, context, pixelRatio);\n\n      image = context.canvas;\n      this.canvas_[pixelRatio] = image;\n    }\n    return image;\n  }\n\n  /**\n   * Get the image pixel ratio.\n   * @param {number} pixelRatio Pixel ratio.\n   * @return {number} Pixel ratio.\n   */\n  getPixelRatio(pixelRatio) {\n    return pixelRatio;\n  }\n\n  /**\n   * @return {import(\"../size.js\").Size} Image size.\n   */\n  getImageSize() {\n    return this.size_;\n  }\n\n  /**\n   * @return {import(\"../ImageState.js\").default} Image state.\n   */\n  getImageState() {\n    return ImageState.LOADED;\n  }\n\n  /**\n   * Get the origin of the symbolizer.\n   * @return {Array<number>} Origin.\n   * @api\n   */\n  getOrigin() {\n    return this.origin_;\n  }\n\n  /**\n   * Get the number of points for generating the shape.\n   * @return {number} Number of points for stars and regular polygons.\n   * @api\n   */\n  getPoints() {\n    return this.points_;\n  }\n\n  /**\n   * Get the (primary) radius for the shape.\n   * @return {number} Radius.\n   * @api\n   */\n  getRadius() {\n    return this.radius_;\n  }\n\n  /**\n   * Get the secondary radius for the shape.\n   * @return {number|undefined} Radius2.\n   * @api\n   */\n  getRadius2() {\n    return this.radius2_;\n  }\n\n  /**\n   * Get the size of the symbolizer (in pixels).\n   * @return {import(\"../size.js\").Size} Size.\n   * @api\n   */\n  getSize() {\n    return this.size_;\n  }\n\n  /**\n   * Get the stroke style for the shape.\n   * @return {import(\"./Stroke.js\").default} Stroke style.\n   * @api\n   */\n  getStroke() {\n    return this.stroke_;\n  }\n\n  /**\n   * Set the stroke style.\n   * @param {import(\"./Stroke.js\").default} stroke Stroke style.\n   * @api\n   */\n  setStroke(stroke) {\n    this.stroke_ = stroke;\n    this.render();\n  }\n\n  /**\n   * @param {function(import(\"../events/Event.js\").default): void} listener Listener function.\n   */\n  listenImageChange(listener) {}\n\n  /**\n   * Load not yet loaded URI.\n   */\n  load() {}\n\n  /**\n   * @param {function(import(\"../events/Event.js\").default): void} listener Listener function.\n   */\n  unlistenImageChange(listener) {}\n\n  /**\n   * Calculate additional canvas size needed for the miter.\n   * @param {string} lineJoin Line join\n   * @param {number} strokeWidth Stroke width\n   * @param {number} miterLimit Miter limit\n   * @return {number} Additional canvas size needed\n   * @private\n   */\n  calculateLineJoinSize_(lineJoin, strokeWidth, miterLimit) {\n    if (\n      strokeWidth === 0 ||\n      this.points_ === Infinity ||\n      (lineJoin !== 'bevel' && lineJoin !== 'miter')\n    ) {\n      return strokeWidth;\n    }\n    // m  | ^\n    // i  | |\\                  .\n    // t >|  #\\\n    // e  | |\\ \\              .\n    // r      \\s\\\n    //      |  \\t\\          .                 .\n    //          \\r\\                      .   .\n    //      |    \\o\\      .          .  . . .\n    //          e \\k\\            .  .    . .\n    //      |      \\e\\  .    .  .       . .\n    //       d      \\ \\  .  .          . .\n    //      | _ _a_ _\\#  .            . .\n    //   r1          / `             . .\n    //      |                       . .\n    //       b     /               . .\n    //      |                     . .\n    //           / r2            . .\n    //      |                        .   .\n    //         /                           .   .\n    //      |α                                   .   .\n    //       /                                         .   .\n    //      ° center\n    let r1 = this.radius_;\n    let r2 = this.radius2_ === undefined ? r1 : this.radius2_;\n    if (r1 < r2) {\n      const tmp = r1;\n      r1 = r2;\n      r2 = tmp;\n    }\n    const points =\n      this.radius2_ === undefined ? this.points_ : this.points_ * 2;\n    const alpha = (2 * Math.PI) / points;\n    const a = r2 * Math.sin(alpha);\n    const b = Math.sqrt(r2 * r2 - a * a);\n    const d = r1 - b;\n    const e = Math.sqrt(a * a + d * d);\n    const miterRatio = e / a;\n    if (lineJoin === 'miter' && miterRatio <= miterLimit) {\n      return miterRatio * strokeWidth;\n    }\n    // Calculate the distance from center to the stroke corner where\n    // it was cut short because of the miter limit.\n    //              l\n    //        ----+---- <= distance from center to here is maxr\n    //       /####|k ##\\\n    //      /#####^#####\\\n    //     /#### /+\\# s #\\\n    //    /### h/+++\\# t #\\\n    //   /### t/+++++\\# r #\\\n    //  /### a/+++++++\\# o #\\\n    // /### p/++ fill +\\# k #\\\n    ///#### /+++++^+++++\\# e #\\\n    //#####/+++++/+\\+++++\\#####\\\n    const k = strokeWidth / 2 / miterRatio;\n    const l = (strokeWidth / 2) * (d / e);\n    const maxr = Math.sqrt((r1 + k) * (r1 + k) + l * l);\n    const bevelAdd = maxr - r1;\n    if (this.radius2_ === undefined || lineJoin === 'bevel') {\n      return bevelAdd * 2;\n    }\n    // If outer miter is over the miter limit the inner miter may reach through the\n    // center and be longer than the bevel, same calculation as above but swap r1 / r2.\n    const aa = r1 * Math.sin(alpha);\n    const bb = Math.sqrt(r1 * r1 - aa * aa);\n    const dd = r2 - bb;\n    const ee = Math.sqrt(aa * aa + dd * dd);\n    const innerMiterRatio = ee / aa;\n    if (innerMiterRatio <= miterLimit) {\n      const innerLength = (innerMiterRatio * strokeWidth) / 2 - r2 - r1;\n      return 2 * Math.max(bevelAdd, innerLength);\n    }\n    return bevelAdd * 2;\n  }\n\n  /**\n   * @return {RenderOptions}  The render options\n   * @protected\n   */\n  createRenderOptions() {\n    let lineJoin = defaultLineJoin;\n    let miterLimit = 0;\n    let lineDash = null;\n    let lineDashOffset = 0;\n    let strokeStyle;\n    let strokeWidth = 0;\n\n    if (this.stroke_) {\n      strokeStyle = this.stroke_.getColor();\n      if (strokeStyle === null) {\n        strokeStyle = defaultStrokeStyle;\n      }\n      strokeStyle = asColorLike(strokeStyle);\n      strokeWidth = this.stroke_.getWidth();\n      if (strokeWidth === undefined) {\n        strokeWidth = defaultLineWidth;\n      }\n      lineDash = this.stroke_.getLineDash();\n      lineDashOffset = this.stroke_.getLineDashOffset();\n      lineJoin = this.stroke_.getLineJoin();\n      if (lineJoin === undefined) {\n        lineJoin = defaultLineJoin;\n      }\n      miterLimit = this.stroke_.getMiterLimit();\n      if (miterLimit === undefined) {\n        miterLimit = defaultMiterLimit;\n      }\n    }\n\n    const add = this.calculateLineJoinSize_(lineJoin, strokeWidth, miterLimit);\n    const maxRadius = Math.max(this.radius_, this.radius2_ || 0);\n    const size = Math.ceil(2 * maxRadius + add);\n\n    return {\n      strokeStyle: strokeStyle,\n      strokeWidth: strokeWidth,\n      size: size,\n      lineDash: lineDash,\n      lineDashOffset: lineDashOffset,\n      lineJoin: lineJoin,\n      miterLimit: miterLimit,\n    };\n  }\n\n  /**\n   * @protected\n   */\n  render() {\n    this.renderOptions_ = this.createRenderOptions();\n    const size = this.renderOptions_.size;\n    this.canvas_ = {};\n    this.size_ = [size, size];\n  }\n\n  /**\n   * @private\n   * @param {RenderOptions} renderOptions Render options.\n   * @param {CanvasRenderingContext2D} context The rendering context.\n   * @param {number} pixelRatio The pixel ratio.\n   */\n  draw_(renderOptions, context, pixelRatio) {\n    context.scale(pixelRatio, pixelRatio);\n    // set origin to canvas center\n    context.translate(renderOptions.size / 2, renderOptions.size / 2);\n\n    this.createPath_(context);\n\n    if (this.fill_) {\n      let color = this.fill_.getColor();\n      if (color === null) {\n        color = defaultFillStyle;\n      }\n      context.fillStyle = asColorLike(color);\n      context.fill();\n    }\n    if (this.stroke_) {\n      context.strokeStyle = renderOptions.strokeStyle;\n      context.lineWidth = renderOptions.strokeWidth;\n      if (renderOptions.lineDash) {\n        context.setLineDash(renderOptions.lineDash);\n        context.lineDashOffset = renderOptions.lineDashOffset;\n      }\n      context.lineJoin = renderOptions.lineJoin;\n      context.miterLimit = renderOptions.miterLimit;\n      context.stroke();\n    }\n  }\n\n  /**\n   * @private\n   * @param {RenderOptions} renderOptions Render options.\n   */\n  createHitDetectionCanvas_(renderOptions) {\n    if (this.fill_) {\n      let color = this.fill_.getColor();\n\n      // determine if fill is transparent (or pattern or gradient)\n      let opacity = 0;\n      if (typeof color === 'string') {\n        color = asArray(color);\n      }\n      if (color === null) {\n        opacity = 1;\n      } else if (Array.isArray(color)) {\n        opacity = color.length === 4 ? color[3] : 1;\n      }\n      if (opacity === 0) {\n        // if a transparent fill style is set, create an extra hit-detection image\n        // with a default fill style\n        const context = createCanvasContext2D(\n          renderOptions.size,\n          renderOptions.size\n        );\n        this.hitDetectionCanvas_ = context.canvas;\n\n        this.drawHitDetectionCanvas_(renderOptions, context);\n      }\n    }\n    if (!this.hitDetectionCanvas_) {\n      this.hitDetectionCanvas_ = this.getImage(1);\n    }\n  }\n\n  /**\n   * @private\n   * @param {CanvasRenderingContext2D} context The context to draw in.\n   */\n  createPath_(context) {\n    let points = this.points_;\n    const radius = this.radius_;\n    if (points === Infinity) {\n      context.arc(0, 0, radius, 0, 2 * Math.PI);\n    } else {\n      const radius2 = this.radius2_ === undefined ? radius : this.radius2_;\n      if (this.radius2_ !== undefined) {\n        points *= 2;\n      }\n      const startAngle = this.angle_ - Math.PI / 2;\n      const step = (2 * Math.PI) / points;\n      for (let i = 0; i < points; i++) {\n        const angle0 = startAngle + i * step;\n        const radiusC = i % 2 === 0 ? radius : radius2;\n        context.lineTo(radiusC * Math.cos(angle0), radiusC * Math.sin(angle0));\n      }\n      context.closePath();\n    }\n  }\n\n  /**\n   * @private\n   * @param {RenderOptions} renderOptions Render options.\n   * @param {CanvasRenderingContext2D} context The context.\n   */\n  drawHitDetectionCanvas_(renderOptions, context) {\n    // set origin to canvas center\n    context.translate(renderOptions.size / 2, renderOptions.size / 2);\n\n    this.createPath_(context);\n\n    context.fillStyle = defaultFillStyle;\n    context.fill();\n    if (this.stroke_) {\n      context.strokeStyle = renderOptions.strokeStyle;\n      context.lineWidth = renderOptions.strokeWidth;\n      if (renderOptions.lineDash) {\n        context.setLineDash(renderOptions.lineDash);\n        context.lineDashOffset = renderOptions.lineDashOffset;\n      }\n      context.lineJoin = renderOptions.lineJoin;\n      context.miterLimit = renderOptions.miterLimit;\n      context.stroke();\n    }\n  }\n}\n\nexport default RegularShape;\n","/**\n * @module ol/style/Circle\n */\n\nimport RegularShape from './RegularShape.js';\n\n/**\n * @typedef {Object} Options\n * @property {import(\"./Fill.js\").default} [fill] Fill style.\n * @property {number} radius Circle radius.\n * @property {import(\"./Stroke.js\").default} [stroke] Stroke style.\n * @property {Array<number>} [displacement=[0,0]] displacement\n * @property {number|import(\"../size.js\").Size} [scale=1] Scale. A two dimensional scale will produce an ellipse.\n * Unless two dimensional scaling is required a better result may be obtained with an appropriate setting for `radius`.\n * @property {number} [rotation=0] Rotation in radians\n * (positive rotation clockwise, meaningful only when used in conjunction with a two dimensional scale).\n * @property {boolean} [rotateWithView=false] Whether to rotate the shape with the view\n * (meaningful only when used in conjunction with a two dimensional scale).\n * @property {\"declutter\"|\"obstacle\"|\"none\"|undefined} [declutterMode] Declutter mode\n */\n\n/**\n * @classdesc\n * Set circle style for vector features.\n * @api\n */\nclass CircleStyle extends RegularShape {\n  /**\n   * @param {Options} [options] Options.\n   */\n  constructor(options) {\n    options = options ? options : {radius: 5};\n\n    super({\n      points: Infinity,\n      fill: options.fill,\n      radius: options.radius,\n      stroke: options.stroke,\n      scale: options.scale !== undefined ? options.scale : 1,\n      rotation: options.rotation !== undefined ? options.rotation : 0,\n      rotateWithView:\n        options.rotateWithView !== undefined ? options.rotateWithView : false,\n      displacement:\n        options.displacement !== undefined ? options.displacement : [0, 0],\n      declutterMode: options.declutterMode,\n    });\n  }\n\n  /**\n   * Clones the style.\n   * @return {CircleStyle} The cloned style.\n   * @api\n   */\n  clone() {\n    const scale = this.getScale();\n    const style = new CircleStyle({\n      fill: this.getFill() ? this.getFill().clone() : undefined,\n      stroke: this.getStroke() ? this.getStroke().clone() : undefined,\n      radius: this.getRadius(),\n      scale: Array.isArray(scale) ? scale.slice() : scale,\n      rotation: this.getRotation(),\n      rotateWithView: this.getRotateWithView(),\n      displacement: this.getDisplacement().slice(),\n      declutterMode: this.getDeclutterMode(),\n    });\n    style.setOpacity(this.getOpacity());\n    return style;\n  }\n\n  /**\n   * Set the circle radius.\n   *\n   * @param {number} radius Circle radius.\n   * @api\n   */\n  setRadius(radius) {\n    this.radius_ = radius;\n    this.render();\n  }\n}\n\nexport default CircleStyle;\n","/**\n * @module ol/style/Fill\n */\n\n/**\n * @typedef {Object} Options\n * @property {import(\"../color.js\").Color|import(\"../colorlike.js\").ColorLike|null} [color=null] A color, gradient or pattern.\n * See {@link module:ol/color~Color} and {@link module:ol/colorlike~ColorLike} for possible formats.\n * Default null; if null, the Canvas/renderer default black will be used.\n */\n\n/**\n * @classdesc\n * Set fill style for vector features.\n * @api\n */\nclass Fill {\n  /**\n   * @param {Options} [options] Options.\n   */\n  constructor(options) {\n    options = options || {};\n\n    /**\n     * @private\n     * @type {import(\"../color.js\").Color|import(\"../colorlike.js\").ColorLike|null}\n     */\n    this.color_ = options.color !== undefined ? options.color : null;\n  }\n\n  /**\n   * Clones the style. The color is not cloned if it is an {@link module:ol/colorlike~ColorLike}.\n   * @return {Fill} The cloned style.\n   * @api\n   */\n  clone() {\n    const color = this.getColor();\n    return new Fill({\n      color: Array.isArray(color) ? color.slice() : color || undefined,\n    });\n  }\n\n  /**\n   * Get the fill color.\n   * @return {import(\"../color.js\").Color|import(\"../colorlike.js\").ColorLike|null} Color.\n   * @api\n   */\n  getColor() {\n    return this.color_;\n  }\n\n  /**\n   * Set the color.\n   *\n   * @param {import(\"../color.js\").Color|import(\"../colorlike.js\").ColorLike|null} color Color.\n   * @api\n   */\n  setColor(color) {\n    this.color_ = color;\n  }\n}\n\nexport default Fill;\n","/**\n * @module ol/style/IconImage\n */\n\nimport EventTarget from '../events/Target.js';\nimport EventType from '../events/EventType.js';\nimport ImageState from '../ImageState.js';\nimport {asString} from '../color.js';\nimport {createCanvasContext2D} from '../dom.js';\nimport {shared as iconImageCache} from './IconImageCache.js';\nimport {listenImage} from '../Image.js';\n\n/**\n * @type {CanvasRenderingContext2D}\n */\nlet taintedTestContext = null;\n\nclass IconImage extends EventTarget {\n  /**\n   * @param {HTMLImageElement|HTMLCanvasElement} image Image.\n   * @param {string|undefined} src Src.\n   * @param {import(\"../size.js\").Size} size Size.\n   * @param {?string} crossOrigin Cross origin.\n   * @param {import(\"../ImageState.js\").default} imageState Image state.\n   * @param {import(\"../color.js\").Color} color Color.\n   */\n  constructor(image, src, size, crossOrigin, imageState, color) {\n    super();\n\n    /**\n     * @private\n     * @type {HTMLImageElement|HTMLCanvasElement}\n     */\n    this.hitDetectionImage_ = null;\n\n    /**\n     * @private\n     * @type {HTMLImageElement|HTMLCanvasElement}\n     */\n    this.image_ = image;\n\n    /**\n     * @private\n     * @type {string|null}\n     */\n    this.crossOrigin_ = crossOrigin;\n\n    /**\n     * @private\n     * @type {Object<number, HTMLCanvasElement>}\n     */\n    this.canvas_ = {};\n\n    /**\n     * @private\n     * @type {import(\"../color.js\").Color}\n     */\n    this.color_ = color;\n\n    /**\n     * @private\n     * @type {?function():void}\n     */\n    this.unlisten_ = null;\n\n    /**\n     * @private\n     * @type {import(\"../ImageState.js\").default}\n     */\n    this.imageState_ = imageState;\n\n    /**\n     * @private\n     * @type {import(\"../size.js\").Size}\n     */\n    this.size_ = size;\n\n    /**\n     * @private\n     * @type {string|undefined}\n     */\n    this.src_ = src;\n\n    /**\n     * @private\n     */\n    this.tainted_;\n  }\n\n  /**\n   * @private\n   */\n  initializeImage_() {\n    this.image_ = new Image();\n    if (this.crossOrigin_ !== null) {\n      this.image_.crossOrigin = this.crossOrigin_;\n    }\n  }\n\n  /**\n   * @private\n   * @return {boolean} The image canvas is tainted.\n   */\n  isTainted_() {\n    if (this.tainted_ === undefined && this.imageState_ === ImageState.LOADED) {\n      if (!taintedTestContext) {\n        taintedTestContext = createCanvasContext2D(1, 1, undefined, {\n          willReadFrequently: true,\n        });\n      }\n      taintedTestContext.drawImage(this.image_, 0, 0);\n      try {\n        taintedTestContext.getImageData(0, 0, 1, 1);\n        this.tainted_ = false;\n      } catch (e) {\n        taintedTestContext = null;\n        this.tainted_ = true;\n      }\n    }\n    return this.tainted_ === true;\n  }\n\n  /**\n   * @private\n   */\n  dispatchChangeEvent_() {\n    this.dispatchEvent(EventType.CHANGE);\n  }\n\n  /**\n   * @private\n   */\n  handleImageError_() {\n    this.imageState_ = ImageState.ERROR;\n    this.unlistenImage_();\n    this.dispatchChangeEvent_();\n  }\n\n  /**\n   * @private\n   */\n  handleImageLoad_() {\n    this.imageState_ = ImageState.LOADED;\n    if (this.size_) {\n      this.image_.width = this.size_[0];\n      this.image_.height = this.size_[1];\n    } else {\n      this.size_ = [this.image_.width, this.image_.height];\n    }\n    this.unlistenImage_();\n    this.dispatchChangeEvent_();\n  }\n\n  /**\n   * @param {number} pixelRatio Pixel ratio.\n   * @return {HTMLImageElement|HTMLCanvasElement} Image or Canvas element.\n   */\n  getImage(pixelRatio) {\n    if (!this.image_) {\n      this.initializeImage_();\n    }\n    this.replaceColor_(pixelRatio);\n    return this.canvas_[pixelRatio] ? this.canvas_[pixelRatio] : this.image_;\n  }\n\n  /**\n   * @param {number} pixelRatio Pixel ratio.\n   * @return {number} Image or Canvas element.\n   */\n  getPixelRatio(pixelRatio) {\n    this.replaceColor_(pixelRatio);\n    return this.canvas_[pixelRatio] ? pixelRatio : 1;\n  }\n\n  /**\n   * @return {import(\"../ImageState.js\").default} Image state.\n   */\n  getImageState() {\n    return this.imageState_;\n  }\n\n  /**\n   * @return {HTMLImageElement|HTMLCanvasElement} Image element.\n   */\n  getHitDetectionImage() {\n    if (!this.image_) {\n      this.initializeImage_();\n    }\n    if (!this.hitDetectionImage_) {\n      if (this.isTainted_()) {\n        const width = this.size_[0];\n        const height = this.size_[1];\n        const context = createCanvasContext2D(width, height);\n        context.fillRect(0, 0, width, height);\n        this.hitDetectionImage_ = context.canvas;\n      } else {\n        this.hitDetectionImage_ = this.image_;\n      }\n    }\n    return this.hitDetectionImage_;\n  }\n\n  /**\n   * Get the size of the icon (in pixels).\n   * @return {import(\"../size.js\").Size} Image size.\n   */\n  getSize() {\n    return this.size_;\n  }\n\n  /**\n   * @return {string|undefined} Image src.\n   */\n  getSrc() {\n    return this.src_;\n  }\n\n  /**\n   * Load not yet loaded URI.\n   */\n  load() {\n    if (this.imageState_ !== ImageState.IDLE) {\n      return;\n    }\n    if (!this.image_) {\n      this.initializeImage_();\n    }\n\n    this.imageState_ = ImageState.LOADING;\n    try {\n      /** @type {HTMLImageElement} */ (this.image_).src = this.src_;\n    } catch (e) {\n      this.handleImageError_();\n    }\n    this.unlisten_ = listenImage(\n      this.image_,\n      this.handleImageLoad_.bind(this),\n      this.handleImageError_.bind(this)\n    );\n  }\n\n  /**\n   * @param {number} pixelRatio Pixel ratio.\n   * @private\n   */\n  replaceColor_(pixelRatio) {\n    if (\n      !this.color_ ||\n      this.canvas_[pixelRatio] ||\n      this.imageState_ !== ImageState.LOADED\n    ) {\n      return;\n    }\n\n    const image = this.image_;\n    const canvas = document.createElement('canvas');\n    canvas.width = Math.ceil(image.width * pixelRatio);\n    canvas.height = Math.ceil(image.height * pixelRatio);\n\n    const ctx = canvas.getContext('2d');\n    ctx.scale(pixelRatio, pixelRatio);\n    ctx.drawImage(image, 0, 0);\n\n    ctx.globalCompositeOperation = 'multiply';\n    ctx.fillStyle = asString(this.color_);\n    ctx.fillRect(0, 0, canvas.width / pixelRatio, canvas.height / pixelRatio);\n\n    ctx.globalCompositeOperation = 'destination-in';\n    ctx.drawImage(image, 0, 0);\n\n    this.canvas_[pixelRatio] = canvas;\n  }\n\n  /**\n   * Discards event handlers which listen for load completion or errors.\n   *\n   * @private\n   */\n  unlistenImage_() {\n    if (this.unlisten_) {\n      this.unlisten_();\n      this.unlisten_ = null;\n    }\n  }\n}\n\n/**\n * @param {HTMLImageElement|HTMLCanvasElement} image Image.\n * @param {string} src Src.\n * @param {import(\"../size.js\").Size} size Size.\n * @param {?string} crossOrigin Cross origin.\n * @param {import(\"../ImageState.js\").default} imageState Image state.\n * @param {import(\"../color.js\").Color} color Color.\n * @return {IconImage} Icon image.\n */\nexport function get(image, src, size, crossOrigin, imageState, color) {\n  let iconImage = iconImageCache.get(src, crossOrigin, color);\n  if (!iconImage) {\n    iconImage = new IconImage(image, src, size, crossOrigin, imageState, color);\n    iconImageCache.set(src, crossOrigin, color, iconImage);\n  }\n  return iconImage;\n}\n\nexport default IconImage;\n","/**\n * @module ol/style/Icon\n */\nimport EventType from '../events/EventType.js';\nimport ImageState from '../ImageState.js';\nimport ImageStyle from './Image.js';\nimport {asArray} from '../color.js';\nimport {assert} from '../asserts.js';\nimport {get as getIconImage} from './IconImage.js';\nimport {getUid} from '../util.js';\n\n/**\n * @typedef {'fraction' | 'pixels'} IconAnchorUnits\n * Anchor unit can be either a fraction of the icon size or in pixels.\n */\n\n/**\n * @typedef {'bottom-left' | 'bottom-right' | 'top-left' | 'top-right'} IconOrigin\n * Icon origin. One of 'bottom-left', 'bottom-right', 'top-left', 'top-right'.\n */\n\n/**\n * @typedef {Object} Options\n * @property {Array<number>} [anchor=[0.5, 0.5]] Anchor. Default value is the icon center.\n * @property {IconOrigin} [anchorOrigin='top-left'] Origin of the anchor: `bottom-left`, `bottom-right`,\n * `top-left` or `top-right`.\n * @property {IconAnchorUnits} [anchorXUnits='fraction'] Units in which the anchor x value is\n * specified. A value of `'fraction'` indicates the x value is a fraction of the icon. A value of `'pixels'` indicates\n * the x value in pixels.\n * @property {IconAnchorUnits} [anchorYUnits='fraction'] Units in which the anchor y value is\n * specified. A value of `'fraction'` indicates the y value is a fraction of the icon. A value of `'pixels'` indicates\n * the y value in pixels.\n * @property {import(\"../color.js\").Color|string} [color] Color to tint the icon. If not specified,\n * the icon will be left as is.\n * @property {null|string} [crossOrigin] The `crossOrigin` attribute for loaded images. Note that you must provide a\n * `crossOrigin` value if you want to access pixel data with the Canvas renderer.\n * See https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image for more detail.\n * @property {HTMLImageElement|HTMLCanvasElement} [img] Image object for the icon. If the `src` option is not provided then the\n * provided image must already be loaded. And in that case, it is required\n * to provide the size of the image, with the `imgSize` option.\n * @property {import(\"../size.js\").Size} [imgSize] Image size in pixels. Only required if `img` is set and `src` is not.\n * The provided `imgSize` needs to match the actual size of the image.\n * @property {Array<number>} [displacement=[0, 0]] Displacement of the icon in pixels.\n * Positive values will shift the icon right and up.\n * @property {number} [opacity=1] Opacity of the icon.\n * @property {number} [width] The width of the icon in pixels. This can't be used together with `scale`.\n * @property {number} [height] The height of the icon in pixels. This can't be used together with `scale`.\n * @property {number|import(\"../size.js\").Size} [scale=1] Scale.\n * @property {boolean} [rotateWithView=false] Whether to rotate the icon with the view.\n * @property {number} [rotation=0] Rotation in radians (positive rotation clockwise).\n * @property {Array<number>} [offset=[0, 0]] Offset which, together with `size` and `offsetOrigin`, defines the\n * sub-rectangle to use from the original (sprite) image.\n * @property {IconOrigin} [offsetOrigin='top-left'] Origin of the offset: `bottom-left`, `bottom-right`,\n * `top-left` or `top-right`.\n * @property {import(\"../size.js\").Size} [size] Icon size in pixels. Used together with `offset` to define the\n * sub-rectangle to use from the original (sprite) image.\n * @property {string} [src] Image source URI.\n * @property {\"declutter\"|\"obstacle\"|\"none\"|undefined} [declutterMode] Declutter mode.\n */\n\n/**\n * @param {number} width The width.\n * @param {number} height The height.\n * @param {number|undefined} wantedWidth The wanted width.\n * @param {number|undefined} wantedHeight The wanted height.\n * @return {number|Array<number>} The scale.\n */\nfunction calculateScale(width, height, wantedWidth, wantedHeight) {\n  if (wantedWidth !== undefined && wantedHeight !== undefined) {\n    return [wantedWidth / width, wantedHeight / height];\n  }\n  if (wantedWidth !== undefined) {\n    return wantedWidth / width;\n  }\n  if (wantedHeight !== undefined) {\n    return wantedHeight / height;\n  }\n  return 1;\n}\n\n/**\n * @classdesc\n * Set icon style for vector features.\n * @api\n */\nclass Icon extends ImageStyle {\n  /**\n   * @param {Options} [options] Options.\n   */\n  constructor(options) {\n    options = options || {};\n\n    /**\n     * @type {number}\n     */\n    const opacity = options.opacity !== undefined ? options.opacity : 1;\n\n    /**\n     * @type {number}\n     */\n    const rotation = options.rotation !== undefined ? options.rotation : 0;\n\n    /**\n     * @type {number|import(\"../size.js\").Size}\n     */\n    const scale = options.scale !== undefined ? options.scale : 1;\n\n    /**\n     * @type {boolean}\n     */\n    const rotateWithView =\n      options.rotateWithView !== undefined ? options.rotateWithView : false;\n\n    super({\n      opacity: opacity,\n      rotation: rotation,\n      scale: scale,\n      displacement:\n        options.displacement !== undefined ? options.displacement : [0, 0],\n      rotateWithView: rotateWithView,\n      declutterMode: options.declutterMode,\n    });\n\n    /**\n     * @private\n     * @type {Array<number>}\n     */\n    this.anchor_ = options.anchor !== undefined ? options.anchor : [0.5, 0.5];\n\n    /**\n     * @private\n     * @type {Array<number>}\n     */\n    this.normalizedAnchor_ = null;\n\n    /**\n     * @private\n     * @type {IconOrigin}\n     */\n    this.anchorOrigin_ =\n      options.anchorOrigin !== undefined ? options.anchorOrigin : 'top-left';\n\n    /**\n     * @private\n     * @type {IconAnchorUnits}\n     */\n    this.anchorXUnits_ =\n      options.anchorXUnits !== undefined ? options.anchorXUnits : 'fraction';\n\n    /**\n     * @private\n     * @type {IconAnchorUnits}\n     */\n    this.anchorYUnits_ =\n      options.anchorYUnits !== undefined ? options.anchorYUnits : 'fraction';\n\n    /**\n     * @private\n     * @type {?string}\n     */\n    this.crossOrigin_ =\n      options.crossOrigin !== undefined ? options.crossOrigin : null;\n\n    /**\n     * @type {HTMLImageElement|HTMLCanvasElement}\n     */\n    const image = options.img !== undefined ? options.img : null;\n\n    /**\n     * @private\n     * @type {import(\"../size.js\").Size|undefined}\n     */\n    this.imgSize_ = options.imgSize;\n\n    /**\n     * @type {string|undefined}\n     */\n    let src = options.src;\n\n    assert(!(src !== undefined && image), 4); // `image` and `src` cannot be provided at the same time\n    assert(!image || (image && this.imgSize_), 5); // `imgSize` must be set when `image` is provided\n\n    if ((src === undefined || src.length === 0) && image) {\n      src = /** @type {HTMLImageElement} */ (image).src || getUid(image);\n    }\n    assert(src !== undefined && src.length > 0, 6); // A defined and non-empty `src` or `image` must be provided\n\n    // `width` or `height` cannot be provided together with `scale`\n    assert(\n      !(\n        (options.width !== undefined || options.height !== undefined) &&\n        options.scale !== undefined\n      ),\n      69\n    );\n\n    /**\n     * @type {import(\"../ImageState.js\").default}\n     */\n    const imageState =\n      options.src !== undefined ? ImageState.IDLE : ImageState.LOADED;\n\n    /**\n     * @private\n     * @type {import(\"../color.js\").Color}\n     */\n    this.color_ = options.color !== undefined ? asArray(options.color) : null;\n\n    /**\n     * @private\n     * @type {import(\"./IconImage.js\").default}\n     */\n    this.iconImage_ = getIconImage(\n      image,\n      /** @type {string} */ (src),\n      this.imgSize_ !== undefined ? this.imgSize_ : null,\n      this.crossOrigin_,\n      imageState,\n      this.color_\n    );\n\n    /**\n     * @private\n     * @type {Array<number>}\n     */\n    this.offset_ = options.offset !== undefined ? options.offset : [0, 0];\n    /**\n     * @private\n     * @type {IconOrigin}\n     */\n    this.offsetOrigin_ =\n      options.offsetOrigin !== undefined ? options.offsetOrigin : 'top-left';\n\n    /**\n     * @private\n     * @type {Array<number>}\n     */\n    this.origin_ = null;\n\n    /**\n     * @private\n     * @type {import(\"../size.js\").Size}\n     */\n    this.size_ = options.size !== undefined ? options.size : null;\n\n    /**\n     * Calculate the scale if width or height were given.\n     */\n    if (options.width !== undefined || options.height !== undefined) {\n      let width, height;\n      if (options.size) {\n        [width, height] = options.size;\n      } else {\n        const image = this.getImage(1);\n        if (\n          image instanceof HTMLCanvasElement ||\n          (image.src && image.complete)\n        ) {\n          width = image.width;\n          height = image.height;\n        } else {\n          this.initialOptions_ = options;\n          const onload = () => {\n            this.unlistenImageChange(onload);\n            if (!this.initialOptions_) {\n              return;\n            }\n            const imageSize = this.iconImage_.getSize();\n            this.setScale(\n              calculateScale(\n                imageSize[0],\n                imageSize[1],\n                options.width,\n                options.height\n              )\n            );\n          };\n          this.listenImageChange(onload);\n          return;\n        }\n      }\n      if (width !== undefined) {\n        this.setScale(\n          calculateScale(width, height, options.width, options.height)\n        );\n      }\n    }\n  }\n\n  /**\n   * Clones the style. The underlying Image/HTMLCanvasElement is not cloned.\n   * @return {Icon} The cloned style.\n   * @api\n   */\n  clone() {\n    let scale, width, height;\n    if (this.initialOptions_) {\n      width = this.initialOptions_.width;\n      height = this.initialOptions_.height;\n    } else {\n      scale = this.getScale();\n      scale = Array.isArray(scale) ? scale.slice() : scale;\n    }\n    const clone = new Icon({\n      anchor: this.anchor_.slice(),\n      anchorOrigin: this.anchorOrigin_,\n      anchorXUnits: this.anchorXUnits_,\n      anchorYUnits: this.anchorYUnits_,\n      color:\n        this.color_ && this.color_.slice\n          ? this.color_.slice()\n          : this.color_ || undefined,\n      crossOrigin: this.crossOrigin_,\n      imgSize: this.imgSize_,\n      offset: this.offset_.slice(),\n      offsetOrigin: this.offsetOrigin_,\n      opacity: this.getOpacity(),\n      rotateWithView: this.getRotateWithView(),\n      rotation: this.getRotation(),\n      scale,\n      width,\n      height,\n      size: this.size_ !== null ? this.size_.slice() : undefined,\n      src: this.getSrc(),\n      displacement: this.getDisplacement().slice(),\n      declutterMode: this.getDeclutterMode(),\n    });\n    return clone;\n  }\n\n  /**\n   * Get the anchor point in pixels. The anchor determines the center point for the\n   * symbolizer.\n   * @return {Array<number>} Anchor.\n   * @api\n   */\n  getAnchor() {\n    let anchor = this.normalizedAnchor_;\n    if (!anchor) {\n      anchor = this.anchor_;\n      const size = this.getSize();\n      if (\n        this.anchorXUnits_ == 'fraction' ||\n        this.anchorYUnits_ == 'fraction'\n      ) {\n        if (!size) {\n          return null;\n        }\n        anchor = this.anchor_.slice();\n        if (this.anchorXUnits_ == 'fraction') {\n          anchor[0] *= size[0];\n        }\n        if (this.anchorYUnits_ == 'fraction') {\n          anchor[1] *= size[1];\n        }\n      }\n\n      if (this.anchorOrigin_ != 'top-left') {\n        if (!size) {\n          return null;\n        }\n        if (anchor === this.anchor_) {\n          anchor = this.anchor_.slice();\n        }\n        if (\n          this.anchorOrigin_ == 'top-right' ||\n          this.anchorOrigin_ == 'bottom-right'\n        ) {\n          anchor[0] = -anchor[0] + size[0];\n        }\n        if (\n          this.anchorOrigin_ == 'bottom-left' ||\n          this.anchorOrigin_ == 'bottom-right'\n        ) {\n          anchor[1] = -anchor[1] + size[1];\n        }\n      }\n      this.normalizedAnchor_ = anchor;\n    }\n    const displacement = this.getDisplacement();\n    const scale = this.getScaleArray();\n    // anchor is scaled by renderer but displacement should not be scaled\n    // so divide by scale here\n    return [\n      anchor[0] - displacement[0] / scale[0],\n      anchor[1] + displacement[1] / scale[1],\n    ];\n  }\n\n  /**\n   * Set the anchor point. The anchor determines the center point for the\n   * symbolizer.\n   *\n   * @param {Array<number>} anchor Anchor.\n   * @api\n   */\n  setAnchor(anchor) {\n    this.anchor_ = anchor;\n    this.normalizedAnchor_ = null;\n  }\n\n  /**\n   * Get the icon color.\n   * @return {import(\"../color.js\").Color} Color.\n   * @api\n   */\n  getColor() {\n    return this.color_;\n  }\n\n  /**\n   * Get the image icon.\n   * @param {number} pixelRatio Pixel ratio.\n   * @return {HTMLImageElement|HTMLCanvasElement} Image or Canvas element.\n   * @api\n   */\n  getImage(pixelRatio) {\n    return this.iconImage_.getImage(pixelRatio);\n  }\n\n  /**\n   * Get the pixel ratio.\n   * @param {number} pixelRatio Pixel ratio.\n   * @return {number} The pixel ratio of the image.\n   * @api\n   */\n  getPixelRatio(pixelRatio) {\n    return this.iconImage_.getPixelRatio(pixelRatio);\n  }\n\n  /**\n   * @return {import(\"../size.js\").Size} Image size.\n   */\n  getImageSize() {\n    return this.iconImage_.getSize();\n  }\n\n  /**\n   * @return {import(\"../ImageState.js\").default} Image state.\n   */\n  getImageState() {\n    return this.iconImage_.getImageState();\n  }\n\n  /**\n   * @return {HTMLImageElement|HTMLCanvasElement} Image element.\n   */\n  getHitDetectionImage() {\n    return this.iconImage_.getHitDetectionImage();\n  }\n\n  /**\n   * Get the origin of the symbolizer.\n   * @return {Array<number>} Origin.\n   * @api\n   */\n  getOrigin() {\n    if (this.origin_) {\n      return this.origin_;\n    }\n    let offset = this.offset_;\n\n    if (this.offsetOrigin_ != 'top-left') {\n      const size = this.getSize();\n      const iconImageSize = this.iconImage_.getSize();\n      if (!size || !iconImageSize) {\n        return null;\n      }\n      offset = offset.slice();\n      if (\n        this.offsetOrigin_ == 'top-right' ||\n        this.offsetOrigin_ == 'bottom-right'\n      ) {\n        offset[0] = iconImageSize[0] - size[0] - offset[0];\n      }\n      if (\n        this.offsetOrigin_ == 'bottom-left' ||\n        this.offsetOrigin_ == 'bottom-right'\n      ) {\n        offset[1] = iconImageSize[1] - size[1] - offset[1];\n      }\n    }\n    this.origin_ = offset;\n    return this.origin_;\n  }\n\n  /**\n   * Get the image URL.\n   * @return {string|undefined} Image src.\n   * @api\n   */\n  getSrc() {\n    return this.iconImage_.getSrc();\n  }\n\n  /**\n   * Get the size of the icon (in pixels).\n   * @return {import(\"../size.js\").Size} Image size.\n   * @api\n   */\n  getSize() {\n    return !this.size_ ? this.iconImage_.getSize() : this.size_;\n  }\n\n  /**\n   * Get the width of the icon (in pixels). Will return undefined when the icon image is not yet loaded.\n   * @return {number} Icon width (in pixels).\n   * @api\n   */\n  getWidth() {\n    const scale = this.getScaleArray();\n    if (this.size_) {\n      return this.size_[0] * scale[0];\n    }\n    if (this.iconImage_.getImageState() == ImageState.LOADED) {\n      return this.iconImage_.getSize()[0] * scale[0];\n    }\n    return undefined;\n  }\n\n  /**\n   * Get the height of the icon (in pixels). Will return undefined when the icon image is not yet loaded.\n   * @return {number} Icon height (in pixels).\n   * @api\n   */\n  getHeight() {\n    const scale = this.getScaleArray();\n    if (this.size_) {\n      return this.size_[1] * scale[1];\n    }\n    if (this.iconImage_.getImageState() == ImageState.LOADED) {\n      return this.iconImage_.getSize()[1] * scale[1];\n    }\n    return undefined;\n  }\n\n  /**\n   * Set the scale.\n   *\n   * @param {number|import(\"../size.js\").Size} scale Scale.\n   * @api\n   */\n  setScale(scale) {\n    delete this.initialOptions_;\n    super.setScale(scale);\n  }\n\n  /**\n   * @param {function(import(\"../events/Event.js\").default): void} listener Listener function.\n   */\n  listenImageChange(listener) {\n    this.iconImage_.addEventListener(EventType.CHANGE, listener);\n  }\n\n  /**\n   * Load not yet loaded URI.\n   * When rendering a feature with an icon style, the vector renderer will\n   * automatically call this method. However, you might want to call this\n   * method yourself for preloading or other purposes.\n   * @api\n   */\n  load() {\n    this.iconImage_.load();\n  }\n\n  /**\n   * @param {function(import(\"../events/Event.js\").default): void} listener Listener function.\n   */\n  unlistenImageChange(listener) {\n    this.iconImage_.removeEventListener(EventType.CHANGE, listener);\n  }\n}\n\nexport default Icon;\n","/**\n * @module ol/style/Stroke\n */\n\n/**\n * @typedef {Object} Options\n * @property {import(\"../color.js\").Color|import(\"../colorlike.js\").ColorLike} [color] A color, gradient or pattern.\n * See {@link module:ol/color~Color} and {@link module:ol/colorlike~ColorLike} for possible formats.\n * Default null; if null, the Canvas/renderer default black will be used.\n * @property {CanvasLineCap} [lineCap='round'] Line cap style: `butt`, `round`, or `square`.\n * @property {CanvasLineJoin} [lineJoin='round'] Line join style: `bevel`, `round`, or `miter`.\n * @property {Array<number>} [lineDash] Line dash pattern. Default is `null` (no dash).\n * @property {number} [lineDashOffset=0] Line dash offset.\n * @property {number} [miterLimit=10] Miter limit.\n * @property {number} [width] Width.\n */\n\n/**\n * @classdesc\n * Set stroke style for vector features.\n * Note that the defaults given are the Canvas defaults, which will be used if\n * option is not defined. The `get` functions return whatever was entered in\n * the options; they will not return the default.\n * @api\n */\nclass Stroke {\n  /**\n   * @param {Options} [options] Options.\n   */\n  constructor(options) {\n    options = options || {};\n\n    /**\n     * @private\n     * @type {import(\"../color.js\").Color|import(\"../colorlike.js\").ColorLike}\n     */\n    this.color_ = options.color !== undefined ? options.color : null;\n\n    /**\n     * @private\n     * @type {CanvasLineCap|undefined}\n     */\n    this.lineCap_ = options.lineCap;\n\n    /**\n     * @private\n     * @type {Array<number>|null}\n     */\n    this.lineDash_ = options.lineDash !== undefined ? options.lineDash : null;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.lineDashOffset_ = options.lineDashOffset;\n\n    /**\n     * @private\n     * @type {CanvasLineJoin|undefined}\n     */\n    this.lineJoin_ = options.lineJoin;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.miterLimit_ = options.miterLimit;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.width_ = options.width;\n  }\n\n  /**\n   * Clones the style.\n   * @return {Stroke} The cloned style.\n   * @api\n   */\n  clone() {\n    const color = this.getColor();\n    return new Stroke({\n      color: Array.isArray(color) ? color.slice() : color || undefined,\n      lineCap: this.getLineCap(),\n      lineDash: this.getLineDash() ? this.getLineDash().slice() : undefined,\n      lineDashOffset: this.getLineDashOffset(),\n      lineJoin: this.getLineJoin(),\n      miterLimit: this.getMiterLimit(),\n      width: this.getWidth(),\n    });\n  }\n\n  /**\n   * Get the stroke color.\n   * @return {import(\"../color.js\").Color|import(\"../colorlike.js\").ColorLike} Color.\n   * @api\n   */\n  getColor() {\n    return this.color_;\n  }\n\n  /**\n   * Get the line cap type for the stroke.\n   * @return {CanvasLineCap|undefined} Line cap.\n   * @api\n   */\n  getLineCap() {\n    return this.lineCap_;\n  }\n\n  /**\n   * Get the line dash style for the stroke.\n   * @return {Array<number>|null} Line dash.\n   * @api\n   */\n  getLineDash() {\n    return this.lineDash_;\n  }\n\n  /**\n   * Get the line dash offset for the stroke.\n   * @return {number|undefined} Line dash offset.\n   * @api\n   */\n  getLineDashOffset() {\n    return this.lineDashOffset_;\n  }\n\n  /**\n   * Get the line join type for the stroke.\n   * @return {CanvasLineJoin|undefined} Line join.\n   * @api\n   */\n  getLineJoin() {\n    return this.lineJoin_;\n  }\n\n  /**\n   * Get the miter limit for the stroke.\n   * @return {number|undefined} Miter limit.\n   * @api\n   */\n  getMiterLimit() {\n    return this.miterLimit_;\n  }\n\n  /**\n   * Get the stroke width.\n   * @return {number|undefined} Width.\n   * @api\n   */\n  getWidth() {\n    return this.width_;\n  }\n\n  /**\n   * Set the color.\n   *\n   * @param {import(\"../color.js\").Color|import(\"../colorlike.js\").ColorLike} color Color.\n   * @api\n   */\n  setColor(color) {\n    this.color_ = color;\n  }\n\n  /**\n   * Set the line cap.\n   *\n   * @param {CanvasLineCap|undefined} lineCap Line cap.\n   * @api\n   */\n  setLineCap(lineCap) {\n    this.lineCap_ = lineCap;\n  }\n\n  /**\n   * Set the line dash.\n   *\n   * @param {Array<number>|null} lineDash Line dash.\n   * @api\n   */\n  setLineDash(lineDash) {\n    this.lineDash_ = lineDash;\n  }\n\n  /**\n   * Set the line dash offset.\n   *\n   * @param {number|undefined} lineDashOffset Line dash offset.\n   * @api\n   */\n  setLineDashOffset(lineDashOffset) {\n    this.lineDashOffset_ = lineDashOffset;\n  }\n\n  /**\n   * Set the line join.\n   *\n   * @param {CanvasLineJoin|undefined} lineJoin Line join.\n   * @api\n   */\n  setLineJoin(lineJoin) {\n    this.lineJoin_ = lineJoin;\n  }\n\n  /**\n   * Set the miter limit.\n   *\n   * @param {number|undefined} miterLimit Miter limit.\n   * @api\n   */\n  setMiterLimit(miterLimit) {\n    this.miterLimit_ = miterLimit;\n  }\n\n  /**\n   * Set the width.\n   *\n   * @param {number|undefined} width Width.\n   * @api\n   */\n  setWidth(width) {\n    this.width_ = width;\n  }\n}\n\nexport default Stroke;\n","/**\n * @module ol/style/Style\n */\n\nimport CircleStyle from './Circle.js';\nimport Fill from './Fill.js';\nimport Stroke from './Stroke.js';\nimport {assert} from '../asserts.js';\n\n/**\n * A function that takes an {@link module:ol/Feature~Feature} and a `{number}`\n * representing the view's resolution. The function should return a\n * {@link module:ol/style/Style~Style} or an array of them. This way e.g. a\n * vector layer can be styled. If the function returns `undefined`, the\n * feature will not be rendered.\n *\n * @typedef {function(import(\"../Feature.js\").FeatureLike, number):(Style|Array<Style>|void)} StyleFunction\n */\n\n/**\n * A {@link Style}, an array of {@link Style}, or a {@link StyleFunction}.\n * @typedef {Style|Array<Style>|StyleFunction} StyleLike\n */\n\n/**\n * A function that takes an {@link module:ol/Feature~Feature} as argument and returns an\n * {@link module:ol/geom/Geometry~Geometry} that will be rendered and styled for the feature.\n *\n * @typedef {function(import(\"../Feature.js\").FeatureLike):\n *     (import(\"../geom/Geometry.js\").default|import(\"../render/Feature.js\").default|undefined)} GeometryFunction\n */\n\n/**\n * Custom renderer function. Takes two arguments:\n *\n * 1. The pixel coordinates of the geometry in GeoJSON notation.\n * 2. The {@link module:ol/render~State} of the layer renderer.\n *\n * @typedef {function((import(\"../coordinate.js\").Coordinate|Array<import(\"../coordinate.js\").Coordinate>|Array<Array<import(\"../coordinate.js\").Coordinate>>),import(\"../render.js\").State): void} RenderFunction\n */\n\n/**\n * @typedef {Object} Options\n * @property {string|import(\"../geom/Geometry.js\").default|GeometryFunction} [geometry] Feature property or geometry\n * or function returning a geometry to render for this style.\n * @property {import(\"./Fill.js\").default} [fill] Fill style.\n * @property {import(\"./Image.js\").default} [image] Image style.\n * @property {RenderFunction} [renderer] Custom renderer. When configured, `fill`, `stroke` and `image` will be\n * ignored, and the provided function will be called with each render frame for each geometry.\n * @property {RenderFunction} [hitDetectionRenderer] Custom renderer for hit detection. If provided will be used\n * in hit detection rendering.\n * @property {import(\"./Stroke.js\").default} [stroke] Stroke style.\n * @property {import(\"./Text.js\").default} [text] Text style.\n * @property {number} [zIndex] Z index.\n */\n\n/**\n * @classdesc\n * Container for vector feature rendering styles. Any changes made to the style\n * or its children through `set*()` methods will not take effect until the\n * feature or layer that uses the style is re-rendered.\n *\n * ## Feature styles\n *\n * If no style is defined, the following default style is used:\n * ```js\n *  import {Circle, Fill, Stroke, Style} from 'ol/style.js';\n *\n *  const fill = new Fill({\n *    color: 'rgba(255,255,255,0.4)',\n *  });\n *  const stroke = new Stroke({\n *    color: '#3399CC',\n *    width: 1.25,\n *  });\n *  const styles = [\n *    new Style({\n *      image: new Circle({\n *        fill: fill,\n *        stroke: stroke,\n *        radius: 5,\n *      }),\n *      fill: fill,\n *      stroke: stroke,\n *    }),\n *  ];\n * ```\n *\n * A separate editing style has the following defaults:\n * ```js\n *  import {Circle, Fill, Stroke, Style} from 'ol/style.js';\n *\n *  const styles = {};\n *  const white = [255, 255, 255, 1];\n *  const blue = [0, 153, 255, 1];\n *  const width = 3;\n *  styles['Polygon'] = [\n *    new Style({\n *      fill: new Fill({\n *        color: [255, 255, 255, 0.5],\n *      }),\n *    }),\n *  ];\n *  styles['MultiPolygon'] =\n *      styles['Polygon'];\n *  styles['LineString'] = [\n *    new Style({\n *      stroke: new Stroke({\n *        color: white,\n *        width: width + 2,\n *      }),\n *    }),\n *    new Style({\n *      stroke: new Stroke({\n *        color: blue,\n *        width: width,\n *      }),\n *    }),\n *  ];\n *  styles['MultiLineString'] = styles['LineString'];\n *\n *  styles['Circle'] = styles['Polygon'].concat(\n *    styles['LineString']\n *  );\n *\n *  styles['Point'] = [\n *    new Style({\n *      image: new Circle({\n *        radius: width * 2,\n *        fill: new Fill({\n *          color: blue,\n *        }),\n *        stroke: new Stroke({\n *          color: white,\n *          width: width / 2,\n *        }),\n *      }),\n *      zIndex: Infinity,\n *    }),\n *  ];\n *  styles['MultiPoint'] =\n *      styles['Point'];\n *  styles['GeometryCollection'] =\n *      styles['Polygon'].concat(\n *          styles['LineString'],\n *          styles['Point']\n *      );\n * ```\n *\n * @api\n */\nclass Style {\n  /**\n   * @param {Options} [options] Style options.\n   */\n  constructor(options) {\n    options = options || {};\n\n    /**\n     * @private\n     * @type {string|import(\"../geom/Geometry.js\").default|GeometryFunction}\n     */\n    this.geometry_ = null;\n\n    /**\n     * @private\n     * @type {!GeometryFunction}\n     */\n    this.geometryFunction_ = defaultGeometryFunction;\n\n    if (options.geometry !== undefined) {\n      this.setGeometry(options.geometry);\n    }\n\n    /**\n     * @private\n     * @type {import(\"./Fill.js\").default}\n     */\n    this.fill_ = options.fill !== undefined ? options.fill : null;\n\n    /**\n     * @private\n     * @type {import(\"./Image.js\").default}\n     */\n    this.image_ = options.image !== undefined ? options.image : null;\n\n    /**\n     * @private\n     * @type {RenderFunction|null}\n     */\n    this.renderer_ = options.renderer !== undefined ? options.renderer : null;\n\n    /**\n     * @private\n     * @type {RenderFunction|null}\n     */\n    this.hitDetectionRenderer_ =\n      options.hitDetectionRenderer !== undefined\n        ? options.hitDetectionRenderer\n        : null;\n\n    /**\n     * @private\n     * @type {import(\"./Stroke.js\").default}\n     */\n    this.stroke_ = options.stroke !== undefined ? options.stroke : null;\n\n    /**\n     * @private\n     * @type {import(\"./Text.js\").default}\n     */\n    this.text_ = options.text !== undefined ? options.text : null;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.zIndex_ = options.zIndex;\n  }\n\n  /**\n   * Clones the style.\n   * @return {Style} The cloned style.\n   * @api\n   */\n  clone() {\n    let geometry = this.getGeometry();\n    if (geometry && typeof geometry === 'object') {\n      geometry = /** @type {import(\"../geom/Geometry.js\").default} */ (\n        geometry\n      ).clone();\n    }\n    return new Style({\n      geometry: geometry,\n      fill: this.getFill() ? this.getFill().clone() : undefined,\n      image: this.getImage() ? this.getImage().clone() : undefined,\n      renderer: this.getRenderer(),\n      stroke: this.getStroke() ? this.getStroke().clone() : undefined,\n      text: this.getText() ? this.getText().clone() : undefined,\n      zIndex: this.getZIndex(),\n    });\n  }\n\n  /**\n   * Get the custom renderer function that was configured with\n   * {@link #setRenderer} or the `renderer` constructor option.\n   * @return {RenderFunction|null} Custom renderer function.\n   * @api\n   */\n  getRenderer() {\n    return this.renderer_;\n  }\n\n  /**\n   * Sets a custom renderer function for this style. When set, `fill`, `stroke`\n   * and `image` options of the style will be ignored.\n   * @param {RenderFunction|null} renderer Custom renderer function.\n   * @api\n   */\n  setRenderer(renderer) {\n    this.renderer_ = renderer;\n  }\n\n  /**\n   * Sets a custom renderer function for this style used\n   * in hit detection.\n   * @param {RenderFunction|null} renderer Custom renderer function.\n   * @api\n   */\n  setHitDetectionRenderer(renderer) {\n    this.hitDetectionRenderer_ = renderer;\n  }\n\n  /**\n   * Get the custom renderer function that was configured with\n   * {@link #setHitDetectionRenderer} or the `hitDetectionRenderer` constructor option.\n   * @return {RenderFunction|null} Custom renderer function.\n   * @api\n   */\n  getHitDetectionRenderer() {\n    return this.hitDetectionRenderer_;\n  }\n\n  /**\n   * Get the geometry to be rendered.\n   * @return {string|import(\"../geom/Geometry.js\").default|GeometryFunction}\n   * Feature property or geometry or function that returns the geometry that will\n   * be rendered with this style.\n   * @api\n   */\n  getGeometry() {\n    return this.geometry_;\n  }\n\n  /**\n   * Get the function used to generate a geometry for rendering.\n   * @return {!GeometryFunction} Function that is called with a feature\n   * and returns the geometry to render instead of the feature's geometry.\n   * @api\n   */\n  getGeometryFunction() {\n    return this.geometryFunction_;\n  }\n\n  /**\n   * Get the fill style.\n   * @return {import(\"./Fill.js\").default} Fill style.\n   * @api\n   */\n  getFill() {\n    return this.fill_;\n  }\n\n  /**\n   * Set the fill style.\n   * @param {import(\"./Fill.js\").default} fill Fill style.\n   * @api\n   */\n  setFill(fill) {\n    this.fill_ = fill;\n  }\n\n  /**\n   * Get the image style.\n   * @return {import(\"./Image.js\").default} Image style.\n   * @api\n   */\n  getImage() {\n    return this.image_;\n  }\n\n  /**\n   * Set the image style.\n   * @param {import(\"./Image.js\").default} image Image style.\n   * @api\n   */\n  setImage(image) {\n    this.image_ = image;\n  }\n\n  /**\n   * Get the stroke style.\n   * @return {import(\"./Stroke.js\").default} Stroke style.\n   * @api\n   */\n  getStroke() {\n    return this.stroke_;\n  }\n\n  /**\n   * Set the stroke style.\n   * @param {import(\"./Stroke.js\").default} stroke Stroke style.\n   * @api\n   */\n  setStroke(stroke) {\n    this.stroke_ = stroke;\n  }\n\n  /**\n   * Get the text style.\n   * @return {import(\"./Text.js\").default} Text style.\n   * @api\n   */\n  getText() {\n    return this.text_;\n  }\n\n  /**\n   * Set the text style.\n   * @param {import(\"./Text.js\").default} text Text style.\n   * @api\n   */\n  setText(text) {\n    this.text_ = text;\n  }\n\n  /**\n   * Get the z-index for the style.\n   * @return {number|undefined} ZIndex.\n   * @api\n   */\n  getZIndex() {\n    return this.zIndex_;\n  }\n\n  /**\n   * Set a geometry that is rendered instead of the feature's geometry.\n   *\n   * @param {string|import(\"../geom/Geometry.js\").default|GeometryFunction} geometry\n   *     Feature property or geometry or function returning a geometry to render\n   *     for this style.\n   * @api\n   */\n  setGeometry(geometry) {\n    if (typeof geometry === 'function') {\n      this.geometryFunction_ = geometry;\n    } else if (typeof geometry === 'string') {\n      this.geometryFunction_ = function (feature) {\n        return /** @type {import(\"../geom/Geometry.js\").default} */ (\n          feature.get(geometry)\n        );\n      };\n    } else if (!geometry) {\n      this.geometryFunction_ = defaultGeometryFunction;\n    } else if (geometry !== undefined) {\n      this.geometryFunction_ = function () {\n        return /** @type {import(\"../geom/Geometry.js\").default} */ (geometry);\n      };\n    }\n    this.geometry_ = geometry;\n  }\n\n  /**\n   * Set the z-index.\n   *\n   * @param {number|undefined} zIndex ZIndex.\n   * @api\n   */\n  setZIndex(zIndex) {\n    this.zIndex_ = zIndex;\n  }\n}\n\n/**\n * Convert the provided object into a style function.  Functions passed through\n * unchanged.  Arrays of Style or single style objects wrapped in a\n * new style function.\n * @param {StyleFunction|Array<Style>|Style} obj\n *     A style function, a single style, or an array of styles.\n * @return {StyleFunction} A style function.\n */\nexport function toFunction(obj) {\n  let styleFunction;\n\n  if (typeof obj === 'function') {\n    styleFunction = obj;\n  } else {\n    /**\n     * @type {Array<Style>}\n     */\n    let styles;\n    if (Array.isArray(obj)) {\n      styles = obj;\n    } else {\n      assert(typeof (/** @type {?} */ (obj).getZIndex) === 'function', 41); // Expected an `Style` or an array of `Style`\n      const style = /** @type {Style} */ (obj);\n      styles = [style];\n    }\n    styleFunction = function () {\n      return styles;\n    };\n  }\n  return styleFunction;\n}\n\n/**\n * @type {Array<Style>|null}\n */\nlet defaultStyles = null;\n\n/**\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n * @param {number} resolution Resolution.\n * @return {Array<Style>} Style.\n */\nexport function createDefaultStyle(feature, resolution) {\n  // We don't use an immediately-invoked function\n  // and a closure so we don't get an error at script evaluation time in\n  // browsers that do not support Canvas. (import(\"./Circle.js\").CircleStyle does\n  // canvas.getContext('2d') at construction time, which will cause an.error\n  // in such browsers.)\n  if (!defaultStyles) {\n    const fill = new Fill({\n      color: 'rgba(255,255,255,0.4)',\n    });\n    const stroke = new Stroke({\n      color: '#3399CC',\n      width: 1.25,\n    });\n    defaultStyles = [\n      new Style({\n        image: new CircleStyle({\n          fill: fill,\n          stroke: stroke,\n          radius: 5,\n        }),\n        fill: fill,\n        stroke: stroke,\n      }),\n    ];\n  }\n  return defaultStyles;\n}\n\n/**\n * Default styles for editing features.\n * @return {Object<import(\"../geom/Geometry.js\").Type, Array<Style>>} Styles\n */\nexport function createEditingStyle() {\n  /** @type {Object<import(\"../geom/Geometry.js\").Type, Array<Style>>} */\n  const styles = {};\n  const white = [255, 255, 255, 1];\n  const blue = [0, 153, 255, 1];\n  const width = 3;\n  styles['Polygon'] = [\n    new Style({\n      fill: new Fill({\n        color: [255, 255, 255, 0.5],\n      }),\n    }),\n  ];\n  styles['MultiPolygon'] = styles['Polygon'];\n\n  styles['LineString'] = [\n    new Style({\n      stroke: new Stroke({\n        color: white,\n        width: width + 2,\n      }),\n    }),\n    new Style({\n      stroke: new Stroke({\n        color: blue,\n        width: width,\n      }),\n    }),\n  ];\n  styles['MultiLineString'] = styles['LineString'];\n\n  styles['Circle'] = styles['Polygon'].concat(styles['LineString']);\n\n  styles['Point'] = [\n    new Style({\n      image: new CircleStyle({\n        radius: width * 2,\n        fill: new Fill({\n          color: blue,\n        }),\n        stroke: new Stroke({\n          color: white,\n          width: width / 2,\n        }),\n      }),\n      zIndex: Infinity,\n    }),\n  ];\n  styles['MultiPoint'] = styles['Point'];\n\n  styles['GeometryCollection'] = styles['Polygon'].concat(\n    styles['LineString'],\n    styles['Point']\n  );\n\n  return styles;\n}\n\n/**\n * Function that is called with a feature and returns its default geometry.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature to get the geometry for.\n * @return {import(\"../geom/Geometry.js\").default|import(\"../render/Feature.js\").default|undefined} Geometry to render.\n */\nfunction defaultGeometryFunction(feature) {\n  return feature.getGeometry();\n}\n\nexport default Style;\n","/**\n * @module ol/style/Text\n */\nimport Fill from './Fill.js';\nimport {toSize} from '../size.js';\n\n/**\n * @typedef {'point' | 'line'} TextPlacement\n * Default text placement is `'point'`. Note that\n * `'line'` requires the underlying geometry to be a {@link module:ol/geom/LineString~LineString},\n * {@link module:ol/geom/Polygon~Polygon}, {@link module:ol/geom/MultiLineString~MultiLineString} or\n * {@link module:ol/geom/MultiPolygon~MultiPolygon}.\n */\n\n/**\n * @typedef {'left' | 'center' | 'right'} TextJustify\n */\n\n/**\n * The default fill color to use if no fill was set at construction time; a\n * blackish `#333`.\n *\n * @const {string}\n */\nconst DEFAULT_FILL_COLOR = '#333';\n\n/**\n * @typedef {Object} Options\n * @property {string} [font] Font style as CSS `font` value, see:\n * https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/font. Default is `'10px sans-serif'`\n * @property {number} [maxAngle=Math.PI/4] When `placement` is set to `'line'`, allow a maximum angle between adjacent characters.\n * The expected value is in radians, and the default is 45° (`Math.PI / 4`).\n * @property {number} [offsetX=0] Horizontal text offset in pixels. A positive will shift the text right.\n * @property {number} [offsetY=0] Vertical text offset in pixels. A positive will shift the text down.\n * @property {boolean} [overflow=false] For polygon labels or when `placement` is set to `'line'`, allow text to exceed\n * the width of the polygon at the label position or the length of the path that it follows.\n * @property {TextPlacement} [placement='point'] Text placement.\n * @property {number} [repeat] Repeat interval. When set, the text will be repeated at this interval, which specifies\n * the distance between two text anchors in pixels. Only available when `placement` is set to `'line'`. Overrides 'textAlign'.\n * @property {number|import(\"../size.js\").Size} [scale] Scale.\n * @property {boolean} [rotateWithView=false] Whether to rotate the text with the view.\n * @property {number} [rotation=0] Rotation in radians (positive rotation clockwise).\n * @property {string|Array<string>} [text] Text content or rich text content. For plain text provide a string, which can\n * contain line breaks (`\\n`). For rich text provide an array of text/font tuples. A tuple consists of the text to\n * render and the font to use (or `''` to use the text style's font). A line break has to be a separate tuple (i.e. `'\\n', ''`).\n * **Example:** `['foo', 'bold 10px sans-serif', ' bar', 'italic 10px sans-serif', ' baz', '']` will yield \"**foo** *bar* baz\".\n * **Note:** Rich text is not supported for `placement: 'line'` or the immediate rendering API.\n * @property {CanvasTextAlign} [textAlign] Text alignment. Possible values: `'left'`, `'right'`, `'center'`, `'end'` or `'start'`.\n * Default is `'center'` for `placement: 'point'`. For `placement: 'line'`, the default is to let the renderer choose a\n * placement where `maxAngle` is not exceeded.\n * @property {TextJustify} [justify] Text justification within the text box.\n * If not set, text is justified towards the `textAlign` anchor.\n * Otherwise, use options `'left'`, `'center'`, or `'right'` to justify the text within the text box.\n * **Note:** `justify` is ignored for immediate rendering and also for `placement: 'line'`.\n * @property {CanvasTextBaseline} [textBaseline='middle'] Text base line. Possible values: `'bottom'`, `'top'`, `'middle'`, `'alphabetic'`,\n * `'hanging'`, `'ideographic'`.\n * @property {import(\"./Fill.js\").default} [fill] Fill style. If none is provided, we'll use a dark fill-style (#333).\n * @property {import(\"./Stroke.js\").default} [stroke] Stroke style.\n * @property {import(\"./Fill.js\").default} [backgroundFill] Fill style for the text background when `placement` is\n * `'point'`. Default is no fill.\n * @property {import(\"./Stroke.js\").default} [backgroundStroke] Stroke style for the text background  when `placement`\n * is `'point'`. Default is no stroke.\n * @property {Array<number>} [padding=[0, 0, 0, 0]] Padding in pixels around the text for decluttering and background. The order of\n * values in the array is `[top, right, bottom, left]`.\n */\n\n/**\n * @classdesc\n * Set text style for vector features.\n * @api\n */\nclass Text {\n  /**\n   * @param {Options} [options] Options.\n   */\n  constructor(options) {\n    options = options || {};\n\n    /**\n     * @private\n     * @type {string|undefined}\n     */\n    this.font_ = options.font;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.rotation_ = options.rotation;\n\n    /**\n     * @private\n     * @type {boolean|undefined}\n     */\n    this.rotateWithView_ = options.rotateWithView;\n\n    /**\n     * @private\n     * @type {number|import(\"../size.js\").Size|undefined}\n     */\n    this.scale_ = options.scale;\n\n    /**\n     * @private\n     * @type {import(\"../size.js\").Size}\n     */\n    this.scaleArray_ = toSize(options.scale !== undefined ? options.scale : 1);\n\n    /**\n     * @private\n     * @type {string|Array<string>|undefined}\n     */\n    this.text_ = options.text;\n\n    /**\n     * @private\n     * @type {CanvasTextAlign|undefined}\n     */\n    this.textAlign_ = options.textAlign;\n\n    /**\n     * @private\n     * @type {TextJustify|undefined}\n     */\n    this.justify_ = options.justify;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.repeat_ = options.repeat;\n\n    /**\n     * @private\n     * @type {CanvasTextBaseline|undefined}\n     */\n    this.textBaseline_ = options.textBaseline;\n\n    /**\n     * @private\n     * @type {import(\"./Fill.js\").default}\n     */\n    this.fill_ =\n      options.fill !== undefined\n        ? options.fill\n        : new Fill({color: DEFAULT_FILL_COLOR});\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.maxAngle_ =\n      options.maxAngle !== undefined ? options.maxAngle : Math.PI / 4;\n\n    /**\n     * @private\n     * @type {TextPlacement}\n     */\n    this.placement_ =\n      options.placement !== undefined ? options.placement : 'point';\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.overflow_ = !!options.overflow;\n\n    /**\n     * @private\n     * @type {import(\"./Stroke.js\").default}\n     */\n    this.stroke_ = options.stroke !== undefined ? options.stroke : null;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.offsetX_ = options.offsetX !== undefined ? options.offsetX : 0;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.offsetY_ = options.offsetY !== undefined ? options.offsetY : 0;\n\n    /**\n     * @private\n     * @type {import(\"./Fill.js\").default}\n     */\n    this.backgroundFill_ = options.backgroundFill\n      ? options.backgroundFill\n      : null;\n\n    /**\n     * @private\n     * @type {import(\"./Stroke.js\").default}\n     */\n    this.backgroundStroke_ = options.backgroundStroke\n      ? options.backgroundStroke\n      : null;\n\n    /**\n     * @private\n     * @type {Array<number>|null}\n     */\n    this.padding_ = options.padding === undefined ? null : options.padding;\n  }\n\n  /**\n   * Clones the style.\n   * @return {Text} The cloned style.\n   * @api\n   */\n  clone() {\n    const scale = this.getScale();\n    return new Text({\n      font: this.getFont(),\n      placement: this.getPlacement(),\n      repeat: this.getRepeat(),\n      maxAngle: this.getMaxAngle(),\n      overflow: this.getOverflow(),\n      rotation: this.getRotation(),\n      rotateWithView: this.getRotateWithView(),\n      scale: Array.isArray(scale) ? scale.slice() : scale,\n      text: this.getText(),\n      textAlign: this.getTextAlign(),\n      justify: this.getJustify(),\n      textBaseline: this.getTextBaseline(),\n      fill: this.getFill() ? this.getFill().clone() : undefined,\n      stroke: this.getStroke() ? this.getStroke().clone() : undefined,\n      offsetX: this.getOffsetX(),\n      offsetY: this.getOffsetY(),\n      backgroundFill: this.getBackgroundFill()\n        ? this.getBackgroundFill().clone()\n        : undefined,\n      backgroundStroke: this.getBackgroundStroke()\n        ? this.getBackgroundStroke().clone()\n        : undefined,\n      padding: this.getPadding() || undefined,\n    });\n  }\n\n  /**\n   * Get the `overflow` configuration.\n   * @return {boolean} Let text overflow the length of the path they follow.\n   * @api\n   */\n  getOverflow() {\n    return this.overflow_;\n  }\n\n  /**\n   * Get the font name.\n   * @return {string|undefined} Font.\n   * @api\n   */\n  getFont() {\n    return this.font_;\n  }\n\n  /**\n   * Get the maximum angle between adjacent characters.\n   * @return {number} Angle in radians.\n   * @api\n   */\n  getMaxAngle() {\n    return this.maxAngle_;\n  }\n\n  /**\n   * Get the label placement.\n   * @return {TextPlacement} Text placement.\n   * @api\n   */\n  getPlacement() {\n    return this.placement_;\n  }\n\n  /**\n   * Get the repeat interval of the text.\n   * @return {number|undefined} Repeat interval in pixels.\n   * @api\n   */\n  getRepeat() {\n    return this.repeat_;\n  }\n\n  /**\n   * Get the x-offset for the text.\n   * @return {number} Horizontal text offset.\n   * @api\n   */\n  getOffsetX() {\n    return this.offsetX_;\n  }\n\n  /**\n   * Get the y-offset for the text.\n   * @return {number} Vertical text offset.\n   * @api\n   */\n  getOffsetY() {\n    return this.offsetY_;\n  }\n\n  /**\n   * Get the fill style for the text.\n   * @return {import(\"./Fill.js\").default} Fill style.\n   * @api\n   */\n  getFill() {\n    return this.fill_;\n  }\n\n  /**\n   * Determine whether the text rotates with the map.\n   * @return {boolean|undefined} Rotate with map.\n   * @api\n   */\n  getRotateWithView() {\n    return this.rotateWithView_;\n  }\n\n  /**\n   * Get the text rotation.\n   * @return {number|undefined} Rotation.\n   * @api\n   */\n  getRotation() {\n    return this.rotation_;\n  }\n\n  /**\n   * Get the text scale.\n   * @return {number|import(\"../size.js\").Size|undefined} Scale.\n   * @api\n   */\n  getScale() {\n    return this.scale_;\n  }\n\n  /**\n   * Get the symbolizer scale array.\n   * @return {import(\"../size.js\").Size} Scale array.\n   */\n  getScaleArray() {\n    return this.scaleArray_;\n  }\n\n  /**\n   * Get the stroke style for the text.\n   * @return {import(\"./Stroke.js\").default} Stroke style.\n   * @api\n   */\n  getStroke() {\n    return this.stroke_;\n  }\n\n  /**\n   * Get the text to be rendered.\n   * @return {string|Array<string>|undefined} Text.\n   * @api\n   */\n  getText() {\n    return this.text_;\n  }\n\n  /**\n   * Get the text alignment.\n   * @return {CanvasTextAlign|undefined} Text align.\n   * @api\n   */\n  getTextAlign() {\n    return this.textAlign_;\n  }\n\n  /**\n   * Get the justification.\n   * @return {TextJustify|undefined} Justification.\n   * @api\n   */\n  getJustify() {\n    return this.justify_;\n  }\n\n  /**\n   * Get the text baseline.\n   * @return {CanvasTextBaseline|undefined} Text baseline.\n   * @api\n   */\n  getTextBaseline() {\n    return this.textBaseline_;\n  }\n\n  /**\n   * Get the background fill style for the text.\n   * @return {import(\"./Fill.js\").default} Fill style.\n   * @api\n   */\n  getBackgroundFill() {\n    return this.backgroundFill_;\n  }\n\n  /**\n   * Get the background stroke style for the text.\n   * @return {import(\"./Stroke.js\").default} Stroke style.\n   * @api\n   */\n  getBackgroundStroke() {\n    return this.backgroundStroke_;\n  }\n\n  /**\n   * Get the padding for the text.\n   * @return {Array<number>|null} Padding.\n   * @api\n   */\n  getPadding() {\n    return this.padding_;\n  }\n\n  /**\n   * Set the `overflow` property.\n   *\n   * @param {boolean} overflow Let text overflow the path that it follows.\n   * @api\n   */\n  setOverflow(overflow) {\n    this.overflow_ = overflow;\n  }\n\n  /**\n   * Set the font.\n   *\n   * @param {string|undefined} font Font.\n   * @api\n   */\n  setFont(font) {\n    this.font_ = font;\n  }\n\n  /**\n   * Set the maximum angle between adjacent characters.\n   *\n   * @param {number} maxAngle Angle in radians.\n   * @api\n   */\n  setMaxAngle(maxAngle) {\n    this.maxAngle_ = maxAngle;\n  }\n\n  /**\n   * Set the x offset.\n   *\n   * @param {number} offsetX Horizontal text offset.\n   * @api\n   */\n  setOffsetX(offsetX) {\n    this.offsetX_ = offsetX;\n  }\n\n  /**\n   * Set the y offset.\n   *\n   * @param {number} offsetY Vertical text offset.\n   * @api\n   */\n  setOffsetY(offsetY) {\n    this.offsetY_ = offsetY;\n  }\n\n  /**\n   * Set the text placement.\n   *\n   * @param {TextPlacement} placement Placement.\n   * @api\n   */\n  setPlacement(placement) {\n    this.placement_ = placement;\n  }\n\n  /**\n   * Set the repeat interval of the text.\n   * @param {number|undefined} [repeat] Repeat interval in pixels.\n   * @api\n   */\n  setRepeat(repeat) {\n    this.repeat_ = repeat;\n  }\n\n  /**\n   * Set whether to rotate the text with the view.\n   *\n   * @param {boolean} rotateWithView Rotate with map.\n   * @api\n   */\n  setRotateWithView(rotateWithView) {\n    this.rotateWithView_ = rotateWithView;\n  }\n\n  /**\n   * Set the fill.\n   *\n   * @param {import(\"./Fill.js\").default} fill Fill style.\n   * @api\n   */\n  setFill(fill) {\n    this.fill_ = fill;\n  }\n\n  /**\n   * Set the rotation.\n   *\n   * @param {number|undefined} rotation Rotation.\n   * @api\n   */\n  setRotation(rotation) {\n    this.rotation_ = rotation;\n  }\n\n  /**\n   * Set the scale.\n   *\n   * @param {number|import(\"../size.js\").Size|undefined} scale Scale.\n   * @api\n   */\n  setScale(scale) {\n    this.scale_ = scale;\n    this.scaleArray_ = toSize(scale !== undefined ? scale : 1);\n  }\n\n  /**\n   * Set the stroke.\n   *\n   * @param {import(\"./Stroke.js\").default} stroke Stroke style.\n   * @api\n   */\n  setStroke(stroke) {\n    this.stroke_ = stroke;\n  }\n\n  /**\n   * Set the text.\n   *\n   * @param {string|Array<string>|undefined} text Text.\n   * @api\n   */\n  setText(text) {\n    this.text_ = text;\n  }\n\n  /**\n   * Set the text alignment.\n   *\n   * @param {CanvasTextAlign|undefined} textAlign Text align.\n   * @api\n   */\n  setTextAlign(textAlign) {\n    this.textAlign_ = textAlign;\n  }\n\n  /**\n   * Set the justification.\n   *\n   * @param {TextJustify|undefined} justify Justification.\n   * @api\n   */\n  setJustify(justify) {\n    this.justify_ = justify;\n  }\n\n  /**\n   * Set the text baseline.\n   *\n   * @param {CanvasTextBaseline|undefined} textBaseline Text baseline.\n   * @api\n   */\n  setTextBaseline(textBaseline) {\n    this.textBaseline_ = textBaseline;\n  }\n\n  /**\n   * Set the background fill.\n   *\n   * @param {import(\"./Fill.js\").default} fill Fill style.\n   * @api\n   */\n  setBackgroundFill(fill) {\n    this.backgroundFill_ = fill;\n  }\n\n  /**\n   * Set the background stroke.\n   *\n   * @param {import(\"./Stroke.js\").default} stroke Stroke style.\n   * @api\n   */\n  setBackgroundStroke(stroke) {\n    this.backgroundStroke_ = stroke;\n  }\n\n  /**\n   * Set the padding (`[top, right, bottom, left]`).\n   *\n   * @param {Array<number>|null} padding Padding.\n   * @api\n   */\n  setPadding(padding) {\n    this.padding_ = padding;\n  }\n}\n\nexport default Text;\n","/**\n * @module ol/style/flat\n */\n\nimport Circle from '../style/Circle.js';\nimport Fill from './Fill.js';\nimport Icon from './Icon.js';\nimport RegularShape from './RegularShape.js';\nimport Stroke from './Stroke.js';\nimport Style from './Style.js';\nimport Text from './Text.js';\n\n/**\n * For static styling, the [layer.setStyle()]{@link module:ol/layer/Vector~VectorLayer#setStyle} method\n * can be called with an object literal that has fill, stroke, text, icon, regular shape, and/or circle properties.\n * @api\n *\n * @typedef {FlatFill & FlatStroke & FlatText & FlatIcon & FlatShape & FlatCircle} FlatStyle\n */\n\n/**\n * A flat style literal or an array of the same.\n *\n * @typedef {FlatStyle|Array<FlatStyle>} FlatStyleLike\n */\n\n/**\n * Fill style properties applied to polygon features.\n *\n * @typedef {Object} FlatFill\n * @property {import(\"../color.js\").Color|import(\"../colorlike.js\").ColorLike} [fill-color] The fill color.\n */\n\n/**\n * Stroke style properties applied to line strings and polygon boundaries.  To apply a stroke, at least one of\n * `stroke-color` or `stroke-width` must be provided.\n *\n * @typedef {Object} FlatStroke\n * @property {import(\"../color.js\").Color|import(\"../colorlike.js\").ColorLike} [stroke-color] The stroke color.\n * @property {number} [stroke-width] Stroke pixel width.\n * @property {CanvasLineCap} [stroke-line-cap='round'] Line cap style: `butt`, `round`, or `square`.\n * @property {CanvasLineJoin} [stroke-line-join='round'] Line join style: `bevel`, `round`, or `miter`.\n * @property {Array<number>} [stroke-line-dash] Line dash pattern.\n * @property {number} [stroke-line-dash-offset=0] Line dash offset.\n * @property {number} [stroke-miter-limit=10] Miter limit.\n */\n\n/**\n * Label style properties applied to all features.  At a minimum, a `text-value` must be provided.\n *\n * @typedef {Object} FlatText\n * @property {string|Array<string>} [text-value] Text content or rich text content. For plain text provide a string, which can\n * contain line breaks (`\\n`). For rich text provide an array of text/font tuples. A tuple consists of the text to\n * render and the font to use (or `''` to use the text style's font). A line break has to be a separate tuple (i.e. `'\\n', ''`).\n * **Example:** `['foo', 'bold 10px sans-serif', ' bar', 'italic 10px sans-serif', ' baz', '']` will yield \"**foo** *bar* baz\".\n * **Note:** Rich text is not supported for `'text-placement': 'line'` or the immediate rendering API.\n * @property {string} [text-font] Font style as CSS `font` value, see:\n * https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/font. Default is `'10px sans-serif'`\n * @property {number} [text-max-angle=Math.PI/4] When `text-placement` is set to `'line'`, allow a maximum angle between adjacent characters.\n * The expected value is in radians, and the default is 45° (`Math.PI / 4`).\n * @property {number} [text-offset-x=0] Horizontal text offset in pixels. A positive will shift the text right.\n * @property {number} [text-offset-y=0] Vertical text offset in pixels. A positive will shift the text down.\n * @property {boolean} [text-overflow=false] For polygon labels or when `placement` is set to `'line'`, allow text to exceed\n * the width of the polygon at the label position or the length of the path that it follows.\n * @property {import(\"./Text.js\").TextPlacement} [text-placement='point'] Text placement.\n * @property {number} [text-repeat] Repeat interval in pixels. When set, the text will be repeated at this interval. Only available when\n * `text-placement` is set to `'line'`. Overrides `text-align`.\n * @property {number|import(\"../size.js\").Size} [text-scale] Scale.\n * @property {boolean} [text-rotate-with-view=false] Whether to rotate the text with the view.\n * @property {number} [text-rotation=0] Rotation in radians (positive rotation clockwise).\n * @property {CanvasTextAlign} [text-align] Text alignment. Possible values: `'left'`, `'right'`, `'center'`, `'end'` or `'start'`.\n * Default is `'center'` for `'text-placement': 'point'`. For `'text-placement': 'line'`, the default is to let the renderer choose a\n * placement where `text-max-angle` is not exceeded.\n * @property {import('./Text.js').TextJustify} [text-justify] Text justification within the text box.\n * If not set, text is justified towards the `textAlign` anchor.\n * Otherwise, use options `'left'`, `'center'`, or `'right'` to justify the text within the text box.\n * **Note:** `text-justify` is ignored for immediate rendering and also for `'text-placement': 'line'`.\n * @property {CanvasTextBaseline} [text-baseline='middle'] Text base line. Possible values: `'bottom'`, `'top'`, `'middle'`, `'alphabetic'`,\n * `'hanging'`, `'ideographic'`.\n * @property {Array<number>} [text-padding=[0, 0, 0, 0]] Padding in pixels around the text for decluttering and background. The order of\n * values in the array is `[top, right, bottom, left]`.\n * @property {import(\"../color.js\").Color|import(\"../colorlike.js\").ColorLike} [text-fill-color] The fill color.\n * @property {import(\"../color.js\").Color|import(\"../colorlike.js\").ColorLike} [text-background-fill-color] The fill color.\n * @property {import(\"../color.js\").Color|import(\"../colorlike.js\").ColorLike} [text-stroke-color] The stroke color.\n * @property {CanvasLineCap} [text-stroke-line-cap='round'] Line cap style: `butt`, `round`, or `square`.\n * @property {CanvasLineJoin} [text-stroke-line-join='round'] Line join style: `bevel`, `round`, or `miter`.\n * @property {Array<number>} [text-stroke-line-dash] Line dash pattern.\n * @property {number} [text-stroke-line-dash-offset=0] Line dash offset.\n * @property {number} [text-stroke-miter-limit=10] Miter limit.\n * @property {number} [text-stroke-width] Stroke pixel width.\n * @property {import(\"../color.js\").Color|import(\"../colorlike.js\").ColorLike} [text-background-stroke-color] The stroke color.\n * @property {CanvasLineCap} [text-background-stroke-line-cap='round'] Line cap style: `butt`, `round`, or `square`.\n * @property {CanvasLineJoin} [text-background-stroke-line-join='round'] Line join style: `bevel`, `round`, or `miter`.\n * @property {Array<number>} [text-background-stroke-line-dash] Line dash pattern.\n * @property {number} [text-background-stroke-line-dash-offset=0] Line dash offset.\n * @property {number} [text-background-stroke-miter-limit=10] Miter limit.\n * @property {number} [text-background-stroke-width] Stroke pixel width.\n */\n\n/**\n * Icon style properties applied to point features.  One of `icon-src` or `icon-img` must be provided to render\n * points with an icon.\n *\n * @typedef {Object} FlatIcon\n * @property {string} [icon-src] Image source URI.\n * @property {HTMLImageElement|HTMLCanvasElement} [icon-img] Image object for the icon. If the `icon-src` option is not provided then the\n * provided image must already be loaded. And in that case, it is required\n * to provide the size of the image, with the `icon-img-size` option.\n * @property {import(\"../size.js\").Size} [icon-img-size] Image size in pixels. Only required if `icon-img` is set and `icon-src` is not.\n * The provided size needs to match the actual size of the image.\n * @property {Array<number>} [icon-anchor=[0.5, 0.5]] Anchor. Default value is the icon center.\n * @property {import(\"./Icon.js\").IconOrigin} [icon-anchor-origin='top-left'] Origin of the anchor: `bottom-left`, `bottom-right`,\n * `top-left` or `top-right`.\n * @property {import(\"./Icon.js\").IconAnchorUnits} [icon-anchor-x-units='fraction'] Units in which the anchor x value is\n * specified. A value of `'fraction'` indicates the x value is a fraction of the icon. A value of `'pixels'` indicates\n * the x value in pixels.\n * @property {import(\"./Icon.js\").IconAnchorUnits} [icon-anchor-y-units='fraction'] Units in which the anchor y value is\n * specified. A value of `'fraction'` indicates the y value is a fraction of the icon. A value of `'pixels'` indicates\n * the y value in pixels.\n * @property {import(\"../color.js\").Color|string} [icon-color] Color to tint the icon. If not specified,\n * the icon will be left as is.\n * @property {null|string} [icon-cross-origin] The `crossOrigin` attribute for loaded images. Note that you must provide a\n * `icon-cross-origin` value if you want to access pixel data with the Canvas renderer.\n * See https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image for more detail.\n * @property {Array<number>} [icon-offset=[0, 0]] Offset, which, together with the size and the offset origin, define the\n * sub-rectangle to use from the original icon image.\n * @property {Array<number>} [icon-displacement=[0,0]] Displacement of the icon.\n * @property {import(\"./Icon.js\").IconOrigin} [icon-offset-origin='top-left'] Origin of the offset: `bottom-left`, `bottom-right`,\n * `top-left` or `top-right`.\n * @property {number} [icon-opacity=1] Opacity of the icon.\n * @property {number|import(\"../size.js\").Size} [icon-scale=1] Scale.\n * @property {number} [icon-width] Width of the icon. If not specified, the actual image width will be used. Cannot be combined\n * with `scale`.\n * @property {number} [icon-height] Height of the icon. If not specified, the actual image height will be used. Cannot be combined\n * with `scale`.\n * @property {number} [icon-rotation=0] Rotation in radians (positive rotation clockwise).\n * @property {boolean} [icon-rotate-with-view=false] Whether to rotate the icon with the view.\n * @property {import(\"../size.js\").Size} [icon-size] Icon size in pixel. Can be used together with `icon-offset` to define the\n * sub-rectangle to use from the origin (sprite) icon image.\n * @property {\"declutter\"|\"obstacle\"|\"none\"|undefined} [icon-declutter-mode] Declutter mode\n */\n\n/**\n * Regular shape style properties for rendering point features.  At least `shape-points` must be provided.\n *\n * @typedef {Object} FlatShape\n * @property {number} [shape-points] Number of points for stars and regular polygons. In case of a polygon, the number of points\n * is the number of sides.\n * @property {import(\"../color.js\").Color|import(\"../colorlike.js\").ColorLike} [shape-fill-color] The fill color.\n * @property {import(\"../color.js\").Color|import(\"../colorlike.js\").ColorLike} [shape-stroke-color] The stroke color.\n * @property {number} [shape-stroke-width] Stroke pixel width.\n * @property {CanvasLineCap} [shape-stroke-line-cap='round'] Line cap style: `butt`, `round`, or `square`.\n * @property {CanvasLineJoin} [shape-stroke-line-join='round'] Line join style: `bevel`, `round`, or `miter`.\n * @property {Array<number>} [shape-stroke-line-dash] Line dash pattern.\n * @property {number} [shape-stroke-line-dash-offset=0] Line dash offset.\n * @property {number} [shape-stroke-miter-limit=10] Miter limit.\n * @property {number} [shape-radius] Radius of a regular polygon.\n * @property {number} [shape-radius1] First radius of a star. Ignored if radius is set.\n * @property {number} [shape-radius2] Second radius of a star.\n * @property {number} [shape-angle=0] Shape's angle in radians. A value of 0 will have one of the shape's point facing up.\n * @property {Array<number>} [shape-displacement=[0,0]] Displacement of the shape\n * @property {number} [shape-rotation=0] Rotation in radians (positive rotation clockwise).\n * @property {boolean} [shape-rotate-with-view=false] Whether to rotate the shape with the view.\n * @property {number|import(\"../size.js\").Size} [shape-scale=1] Scale. Unless two dimensional scaling is required a better\n * result may be obtained with appropriate settings for `shape-radius`, `shape-radius1` and `shape-radius2`.\n * @property {\"declutter\"|\"obstacle\"|\"none\"|undefined} [shape-declutter-mode] Declutter mode.\n */\n\n/**\n * Circle style properties for rendering point features.  At least `circle-radius` must be provided.\n *\n * @typedef {Object} FlatCircle\n * @property {number} [circle-radius] Circle radius.\n * @property {import(\"../color.js\").Color|import(\"../colorlike.js\").ColorLike} [circle-fill-color] The fill color.\n * @property {import(\"../color.js\").Color|import(\"../colorlike.js\").ColorLike} [circle-stroke-color] The stroke color.\n * @property {number} [circle-stroke-width] Stroke pixel width.\n * @property {CanvasLineCap} [circle-stroke-line-cap='round'] Line cap style: `butt`, `round`, or `square`.\n * @property {CanvasLineJoin} [circle-stroke-line-join='round'] Line join style: `bevel`, `round`, or `miter`.\n * @property {Array<number>} [circle-stroke-line-dash] Line dash pattern.\n * @property {number} [circle-stroke-line-dash-offset=0] Line dash offset.\n * @property {number} [circle-stroke-miter-limit=10] Miter limit.\n * @property {Array<number>} [circle-displacement=[0,0]] displacement\n * @property {number|import(\"../size.js\").Size} [circle-scale=1] Scale. A two dimensional scale will produce an ellipse.\n * Unless two dimensional scaling is required a better result may be obtained with an appropriate setting for `circle-radius`.\n * @property {number} [circle-rotation=0] Rotation in radians\n * (positive rotation clockwise, meaningful only when used in conjunction with a two dimensional scale).\n * @property {boolean} [circle-rotate-with-view=false] Whether to rotate the shape with the view\n * (meaningful only when used in conjunction with a two dimensional scale).\n * @property {\"declutter\"|\"obstacle\"|\"none\"|undefined} [circle-declutter-mode] Declutter mode\n */\n\n/**\n * @param {FlatStyle} flatStyle A flat style literal.\n * @return {import(\"./Style.js\").default} A style instance.\n */\nexport function toStyle(flatStyle) {\n  const style = new Style({\n    fill: getFill(flatStyle, ''),\n    stroke: getStroke(flatStyle, ''),\n    text: getText(flatStyle),\n    image: getImage(flatStyle),\n  });\n\n  return style;\n}\n\n/**\n * @param {FlatStyle} flatStyle The flat style.\n * @param {string} prefix The property prefix.\n * @return {Fill|undefined} The fill (if any).\n */\nfunction getFill(flatStyle, prefix) {\n  const color = flatStyle[prefix + 'fill-color'];\n  if (!color) {\n    return;\n  }\n\n  return new Fill({color: color});\n}\n\n/**\n * @param {FlatStyle} flatStyle The flat style.\n * @param {string} prefix The property prefix.\n * @return {Stroke|undefined} The stroke (if any).\n */\nfunction getStroke(flatStyle, prefix) {\n  const width = flatStyle[prefix + 'stroke-width'];\n  const color = flatStyle[prefix + 'stroke-color'];\n  if (!width && !color) {\n    return;\n  }\n\n  return new Stroke({\n    width: width,\n    color: color,\n    lineCap: flatStyle[prefix + 'stroke-line-cap'],\n    lineJoin: flatStyle[prefix + 'stroke-line-join'],\n    lineDash: flatStyle[prefix + 'stroke-line-dash'],\n    lineDashOffset: flatStyle[prefix + 'stroke-line-dash-offset'],\n    miterLimit: flatStyle[prefix + 'stroke-miter-limit'],\n  });\n}\n\n/**\n * @param {FlatStyle} flatStyle The flat style.\n * @return {Text|undefined} The text (if any).\n */\nfunction getText(flatStyle) {\n  const value = flatStyle['text-value'];\n  if (!value) {\n    return;\n  }\n\n  const text = new Text({\n    text: value,\n    font: flatStyle['text-font'],\n    maxAngle: flatStyle['text-max-angle'],\n    offsetX: flatStyle['text-offset-x'],\n    offsetY: flatStyle['text-offset-y'],\n    overflow: flatStyle['text-overflow'],\n    placement: flatStyle['text-placement'],\n    repeat: flatStyle['text-repeat'],\n    scale: flatStyle['text-scale'],\n    rotateWithView: flatStyle['text-rotate-with-view'],\n    rotation: flatStyle['text-rotation'],\n    textAlign: flatStyle['text-align'],\n    justify: flatStyle['text-justify'],\n    textBaseline: flatStyle['text-baseline'],\n    padding: flatStyle['text-padding'],\n    fill: getFill(flatStyle, 'text-'),\n    backgroundFill: getFill(flatStyle, 'text-background-'),\n    stroke: getStroke(flatStyle, 'text-'),\n    backgroundStroke: getStroke(flatStyle, 'text-background-'),\n  });\n\n  return text;\n}\n\n/**\n * @param {FlatStyle} flatStyle The flat style.\n * @return {import(\"./Image.js\").default|undefined} The image (if any).\n */\nfunction getImage(flatStyle) {\n  const iconSrc = flatStyle['icon-src'];\n  const iconImg = flatStyle['icon-img'];\n  if (iconSrc || iconImg) {\n    const icon = new Icon({\n      src: iconSrc,\n      img: iconImg,\n      imgSize: flatStyle['icon-img-size'],\n      anchor: flatStyle['icon-anchor'],\n      anchorOrigin: flatStyle['icon-anchor-origin'],\n      anchorXUnits: flatStyle['icon-anchor-x-units'],\n      anchorYUnits: flatStyle['icon-anchor-y-units'],\n      color: flatStyle['icon-color'],\n      crossOrigin: flatStyle['icon-cross-origin'],\n      offset: flatStyle['icon-offset'],\n      displacement: flatStyle['icon-displacement'],\n      opacity: flatStyle['icon-opacity'],\n      scale: flatStyle['icon-scale'],\n      width: flatStyle['icon-width'],\n      height: flatStyle['icon-height'],\n      rotation: flatStyle['icon-rotation'],\n      rotateWithView: flatStyle['icon-rotate-with-view'],\n      size: flatStyle['icon-size'],\n      declutterMode: flatStyle['icon-declutter-mode'],\n    });\n    return icon;\n  }\n\n  const shapePoints = flatStyle['shape-points'];\n  if (shapePoints) {\n    const prefix = 'shape-';\n    const shape = new RegularShape({\n      points: shapePoints,\n      fill: getFill(flatStyle, prefix),\n      stroke: getStroke(flatStyle, prefix),\n      radius: flatStyle['shape-radius'],\n      radius1: flatStyle['shape-radius1'],\n      radius2: flatStyle['shape-radius2'],\n      angle: flatStyle['shape-angle'],\n      displacement: flatStyle['shape-displacement'],\n      rotation: flatStyle['shape-rotation'],\n      rotateWithView: flatStyle['shape-rotate-with-view'],\n      scale: flatStyle['shape-scale'],\n      declutterMode: flatStyle['shape-declutter-mode'],\n    });\n\n    return shape;\n  }\n\n  const circleRadius = flatStyle['circle-radius'];\n  if (circleRadius) {\n    const prefix = 'circle-';\n    const circle = new Circle({\n      radius: circleRadius,\n      fill: getFill(flatStyle, prefix),\n      stroke: getStroke(flatStyle, prefix),\n      displacement: flatStyle['circle-displacement'],\n      scale: flatStyle['circle-scale'],\n      rotation: flatStyle['circle-rotation'],\n      rotateWithView: flatStyle['circle-rotate-with-view'],\n      declutterMode: flatStyle['circle-declutter-mode'],\n    });\n\n    return circle;\n  }\n\n  return;\n}\n\n/**\n * @return {import('./flat.js').FlatStyle} The default flat style.\n */\nexport function createDefaultStyle() {\n  return {\n    'fill-color': 'rgba(255,255,255,0.4)',\n    'stroke-color': '#3399CC',\n    'stroke-width': 1.25,\n    'circle-radius': 5,\n    'circle-fill-color': 'rgba(255,255,255,0.4)',\n    'circle-stroke-width': 1.25,\n    'circle-stroke-color': '#3399CC',\n  };\n}\n","/**\n * Class for generating shaders from literal style objects\n * @module ol/webgl/ShaderBuilder\n */\nimport {colorToGlsl, numberToGlsl} from '../style/expressions.js';\nimport {createDefaultStyle} from '../style/flat.js';\n\nconst BASE_UNIFORMS = `uniform mat4 u_projectionMatrix;\nuniform mat4 u_screenToWorldMatrix;\nuniform vec2 u_viewportSizePx;\nuniform float u_pixelRatio;\nuniform float u_globalAlpha;\nuniform float u_time;\nuniform float u_zoom;\nuniform float u_resolution;\nuniform vec4 u_renderExtent;\nuniform mediump int u_hitDetection;\n`;\n\nconst DEFAULT_STYLE = createDefaultStyle();\n\n/**\n * @typedef {Object} VaryingDescription\n * @property {string} name Varying name, as will be declared in the header.\n * @property {string} type Varying type, either `float`, `vec2`, `vec4`...\n * @property {string} expression Expression which will be assigned to the varying in the vertex shader, and\n * passed on to the fragment shader.\n */\n\n/**\n * @classdesc\n * This class implements a classic builder pattern for generating many different types of shaders.\n * Methods can be chained, e. g.:\n *\n * ```js\n * const shader = new ShaderBuilder()\n *   .addVarying('v_width', 'float', 'a_width')\n *   .addUniform('u_time')\n *   .setColorExpression('...')\n *   .setSymbolSizeExpression('...')\n *   .outputSymbolFragmentShader();\n * ```\n */\nexport class ShaderBuilder {\n  constructor() {\n    /**\n     * Uniforms; these will be declared in the header (should include the type).\n     * @type {Array<string>}\n     * @private\n     */\n    this.uniforms_ = [];\n\n    /**\n     * Attributes; these will be declared in the header (should include the type).\n     * @type {Array<string>}\n     * @private\n     */\n    this.attributes_ = [];\n\n    /**\n     * Varyings with a name, a type and an expression.\n     * @type {Array<VaryingDescription>}\n     * @private\n     */\n    this.varyings_ = [];\n\n    /**\n     * @type {boolean}\n     * @private\n     */\n    this.hasSymbol_ = false;\n\n    /**\n     * @type {string}\n     * @private\n     */\n    this.symbolSizeExpression_ = `vec2(${numberToGlsl(\n      DEFAULT_STYLE['circle-radius']\n    )})`;\n\n    /**\n     * @type {string}\n     * @private\n     */\n    this.symbolRotationExpression_ = '0.0';\n\n    /**\n     * @type {string}\n     * @private\n     */\n    this.symbolOffsetExpression_ = 'vec2(0.0)';\n\n    /**\n     * @type {string}\n     * @private\n     */\n    this.symbolColorExpression_ = colorToGlsl(\n      /** @type {string} */ (DEFAULT_STYLE['circle-fill-color'])\n    );\n\n    /**\n     * @type {string}\n     * @private\n     */\n    this.texCoordExpression_ = 'vec4(0.0, 0.0, 1.0, 1.0)';\n\n    /**\n     * @type {string}\n     * @private\n     */\n    this.discardExpression_ = 'false';\n\n    /**\n     * @type {boolean}\n     * @private\n     */\n    this.symbolRotateWithView_ = false;\n\n    /**\n     * @type {boolean}\n     * @private\n     */\n    this.hasStroke_ = false;\n\n    /**\n     * @type {string}\n     * @private\n     */\n    this.strokeWidthExpression_ = numberToGlsl(DEFAULT_STYLE['stroke-width']);\n\n    /**\n     * @type {string}\n     * @private\n     */\n    this.strokeColorExpression_ = colorToGlsl(\n      /** @type {string} */ (DEFAULT_STYLE['stroke-color'])\n    );\n\n    /**\n     * @type {boolean}\n     * @private\n     */\n    this.hasFill_ = false;\n\n    /**\n     * @type {string}\n     * @private\n     */\n    this.fillColorExpression_ = colorToGlsl(\n      /** @type {string} */ (DEFAULT_STYLE['fill-color'])\n    );\n\n    /**\n     * @type {Array<string>}\n     * @private\n     */\n    this.vertexShaderFunctions_ = [];\n\n    /**\n     * @type {Array<string>}\n     * @private\n     */\n    this.fragmentShaderFunctions_ = [];\n  }\n\n  /**\n   * Adds a uniform accessible in both fragment and vertex shaders.\n   * The given name should include a type, such as `sampler2D u_texture`.\n   * @param {string} name Uniform name\n   * @return {ShaderBuilder} the builder object\n   */\n  addUniform(name) {\n    this.uniforms_.push(name);\n    return this;\n  }\n\n  /**\n   * Adds an attribute accessible in the vertex shader, read from the geometry buffer.\n   * The given name should include a type, such as `vec2 a_position`.\n   * @param {string} name Attribute name\n   * @return {ShaderBuilder} the builder object\n   */\n  addAttribute(name) {\n    this.attributes_.push(name);\n    return this;\n  }\n\n  /**\n   * Adds a varying defined in the vertex shader and accessible from the fragment shader.\n   * The type and expression of the varying have to be specified separately.\n   * @param {string} name Varying name\n   * @param {'float'|'vec2'|'vec3'|'vec4'} type Type\n   * @param {string} expression Expression used to assign a value to the varying.\n   * @return {ShaderBuilder} the builder object\n   */\n  addVarying(name, type, expression) {\n    this.varyings_.push({\n      name: name,\n      type: type,\n      expression: expression,\n    });\n    return this;\n  }\n\n  /**\n   * Sets an expression to compute the size of the shape.\n   * This expression can use all the uniforms and attributes available\n   * in the vertex shader, and should evaluate to a `vec2` value.\n   * @param {string} expression Size expression\n   * @return {ShaderBuilder} the builder object\n   */\n  setSymbolSizeExpression(expression) {\n    this.hasSymbol_ = true;\n    this.symbolSizeExpression_ = expression;\n    return this;\n  }\n\n  /**\n   * @return {string} The current symbol size expression\n   */\n  getSymbolSizeExpression() {\n    return this.symbolSizeExpression_;\n  }\n\n  /**\n   * Sets an expression to compute the rotation of the shape.\n   * This expression can use all the uniforms and attributes available\n   * in the vertex shader, and should evaluate to a `float` value in radians.\n   * @param {string} expression Size expression\n   * @return {ShaderBuilder} the builder object\n   */\n  setSymbolRotationExpression(expression) {\n    this.symbolRotationExpression_ = expression;\n    return this;\n  }\n\n  /**\n   * Sets an expression to compute the offset of the symbol from the point center.\n   * This expression can use all the uniforms and attributes available\n   * in the vertex shader, and should evaluate to a `vec2` value.\n   * @param {string} expression Offset expression\n   * @return {ShaderBuilder} the builder object\n   */\n  setSymbolOffsetExpression(expression) {\n    this.symbolOffsetExpression_ = expression;\n    return this;\n  }\n\n  /**\n   * Sets an expression to compute the color of the shape.\n   * This expression can use all the uniforms, varyings and attributes available\n   * in the fragment shader, and should evaluate to a `vec4` value.\n   * @param {string} expression Color expression\n   * @return {ShaderBuilder} the builder object\n   */\n  setSymbolColorExpression(expression) {\n    this.hasSymbol_ = true;\n    this.symbolColorExpression_ = expression;\n    return this;\n  }\n\n  /**\n   * @return {string} The current symbol color expression\n   */\n  getSymbolColorExpression() {\n    return this.symbolColorExpression_;\n  }\n\n  /**\n   * Sets an expression to compute the texture coordinates of the vertices.\n   * This expression can use all the uniforms and attributes available\n   * in the vertex shader, and should evaluate to a `vec4` value.\n   * @param {string} expression Texture coordinate expression\n   * @return {ShaderBuilder} the builder object\n   */\n  setTextureCoordinateExpression(expression) {\n    this.texCoordExpression_ = expression;\n    return this;\n  }\n\n  /**\n   * Sets an expression to determine whether a fragment (pixel) should be discarded,\n   * i.e. not drawn at all.\n   * This expression can use all the uniforms, varyings and attributes available\n   * in the fragment shader, and should evaluate to a `bool` value (it will be\n   * used in an `if` statement)\n   * @param {string} expression Fragment discard expression\n   * @return {ShaderBuilder} the builder object\n   */\n  setFragmentDiscardExpression(expression) {\n    this.discardExpression_ = expression;\n    return this;\n  }\n\n  /**\n   * Sets whether the symbols should rotate with the view or stay aligned with the map.\n   * Note: will only be used for point geometry shaders.\n   * @param {boolean} rotateWithView Rotate with view\n   * @return {ShaderBuilder} the builder object\n   */\n  setSymbolRotateWithView(rotateWithView) {\n    this.symbolRotateWithView_ = rotateWithView;\n    return this;\n  }\n\n  /**\n   * @param {string} expression Stroke width expression, returning value in pixels\n   * @return {ShaderBuilder} the builder object\n   */\n  setStrokeWidthExpression(expression) {\n    this.hasStroke_ = true;\n    this.strokeWidthExpression_ = expression;\n    return this;\n  }\n\n  /**\n   * @param {string} expression Stroke color expression, evaluate to `vec4`\n   * @return {ShaderBuilder} the builder object\n   */\n  setStrokeColorExpression(expression) {\n    this.hasStroke_ = true;\n    this.strokeColorExpression_ = expression;\n    return this;\n  }\n\n  /**\n   * @param {string} expression Fill color expression, evaluate to `vec4`\n   * @return {ShaderBuilder} the builder object\n   */\n  setFillColorExpression(expression) {\n    this.hasFill_ = true;\n    this.fillColorExpression_ = expression;\n    return this;\n  }\n\n  addVertexShaderFunction(code) {\n    if (this.vertexShaderFunctions_.includes(code)) {\n      return;\n    }\n    this.vertexShaderFunctions_.push(code);\n  }\n  addFragmentShaderFunction(code) {\n    if (this.fragmentShaderFunctions_.includes(code)) {\n      return;\n    }\n    this.fragmentShaderFunctions_.push(code);\n  }\n\n  /**\n   * Generates a symbol vertex shader from the builder parameters\n   *\n   * The following uniforms are hardcoded in all shaders: `u_projectionMatrix`, `u_offsetScaleMatrix`,\n   * `u_offsetRotateMatrix`, `u_time`, `u_zoom`, `u_resolution`, `u_hitDetection`.\n   *\n   * The following attributes are hardcoded and expected to be present in the vertex buffers:\n   * `vec2 a_position`, `float a_index` (being the index of the vertex in the quad, 0 to 3), `vec4 a_hitColor`.\n   *\n   * The following varyings are hardcoded and gives the coordinate of the pixel both in the quad and on the texture:\n   * `vec2 v_quadCoord`, `vec2 v_texCoord`, `vec4 v_hitColor`.\n   *\n   * @return {string|null} The full shader as a string; null if no size or color specified\n   */\n  getSymbolVertexShader() {\n    if (!this.hasSymbol_) {\n      return null;\n    }\n\n    const offsetMatrix = this.symbolRotateWithView_\n      ? 'u_offsetScaleMatrix * u_offsetRotateMatrix'\n      : 'u_offsetScaleMatrix';\n\n    return `precision mediump float;\nuniform mat4 u_projectionMatrix;\nuniform mat4 u_offsetScaleMatrix;\nuniform mat4 u_offsetRotateMatrix;\nuniform float u_time;\nuniform float u_zoom;\nuniform float u_resolution;\nuniform mediump int u_hitDetection;\n\n${this.uniforms_\n  .map(function (uniform) {\n    return 'uniform ' + uniform + ';';\n  })\n  .join('\\n')}\nattribute vec2 a_position;\nattribute float a_index;\nattribute vec4 a_hitColor;\n${this.attributes_\n  .map(function (attribute) {\n    return 'attribute ' + attribute + ';';\n  })\n  .join('\\n')}\nvarying vec2 v_texCoord;\nvarying vec2 v_quadCoord;\nvarying vec4 v_hitColor;\n${this.varyings_\n  .map(function (varying) {\n    return 'varying ' + varying.type + ' ' + varying.name + ';';\n  })\n  .join('\\n')}\n${this.vertexShaderFunctions_.join('\\n')}\nvoid main(void) {\n  mat4 offsetMatrix = ${offsetMatrix};\n  vec2 halfSize = ${this.symbolSizeExpression_} * 0.5;\n  vec2 offset = ${this.symbolOffsetExpression_};\n  float angle = ${this.symbolRotationExpression_};\n  float offsetX;\n  float offsetY;\n  if (a_index == 0.0) {\n    offsetX = (offset.x - halfSize.x) * cos(angle) + (offset.y - halfSize.y) * sin(angle);\n    offsetY = (offset.y - halfSize.y) * cos(angle) - (offset.x - halfSize.x) * sin(angle);\n  } else if (a_index == 1.0) {\n    offsetX = (offset.x + halfSize.x) * cos(angle) + (offset.y - halfSize.y) * sin(angle);\n    offsetY = (offset.y - halfSize.y) * cos(angle) - (offset.x + halfSize.x) * sin(angle);\n  } else if (a_index == 2.0) {\n    offsetX = (offset.x + halfSize.x) * cos(angle) + (offset.y + halfSize.y) * sin(angle);\n    offsetY = (offset.y + halfSize.y) * cos(angle) - (offset.x + halfSize.x) * sin(angle);\n  } else {\n    offsetX = (offset.x - halfSize.x) * cos(angle) + (offset.y + halfSize.y) * sin(angle);\n    offsetY = (offset.y + halfSize.y) * cos(angle) - (offset.x - halfSize.x) * sin(angle);\n  }\n  vec4 offsets = offsetMatrix * vec4(offsetX, offsetY, 0.0, 0.0);\n  gl_Position = u_projectionMatrix * vec4(a_position, 0.0, 1.0) + offsets;\n  vec4 texCoord = ${this.texCoordExpression_};\n  float u = a_index == 0.0 || a_index == 3.0 ? texCoord.s : texCoord.p;\n  float v = a_index == 2.0 || a_index == 3.0 ? texCoord.t : texCoord.q;\n  v_texCoord = vec2(u, v);\n  u = a_index == 0.0 || a_index == 3.0 ? 0.0 : 1.0;\n  v = a_index == 2.0 || a_index == 3.0 ? 0.0 : 1.0;\n  v_quadCoord = vec2(u, v);\n  v_hitColor = a_hitColor;\n${this.varyings_\n  .map(function (varying) {\n    return '  ' + varying.name + ' = ' + varying.expression + ';';\n  })\n  .join('\\n')}\n}`;\n  }\n\n  /**\n   * Generates a symbol fragment shader from the builder parameters\n   *\n   * Expects the following varyings to be transmitted by the vertex shader:\n   * `vec2 v_quadCoord`, `vec2 v_texCoord`, `vec4 v_hitColor`.\n   *\n   * @return {string|null} The full shader as a string; null if no size or color specified\n   */\n  getSymbolFragmentShader() {\n    if (!this.hasSymbol_) {\n      return null;\n    }\n\n    return `precision mediump float;\nuniform float u_time;\nuniform float u_zoom;\nuniform float u_resolution;\nuniform mediump int u_hitDetection;\n${this.uniforms_\n  .map(function (uniform) {\n    return 'uniform ' + uniform + ';';\n  })\n  .join('\\n')}\nvarying vec2 v_texCoord;\nvarying vec2 v_quadCoord;\nvarying vec4 v_hitColor;\n${this.varyings_\n  .map(function (varying) {\n    return 'varying ' + varying.type + ' ' + varying.name + ';';\n  })\n  .join('\\n')}\n${this.fragmentShaderFunctions_.join('\\n')}\nvoid main(void) {\n  if (${this.discardExpression_}) { discard; }\n  gl_FragColor = ${this.symbolColorExpression_};\n  gl_FragColor.rgb *= gl_FragColor.a;\n  if (u_hitDetection > 0) {\n    if (gl_FragColor.a < 0.1) { discard; };\n    gl_FragColor = v_hitColor;\n  }\n}`;\n  }\n\n  /**\n   * Generates a stroke vertex shader from the builder parameters\n   * @return {string|null} The full shader as a string; null if no size or color specified\n   */\n  getStrokeVertexShader() {\n    if (!this.hasStroke_) {\n      return null;\n    }\n\n    return `#ifdef GL_FRAGMENT_PRECISION_HIGH\nprecision highp float;\n#else\nprecision mediump float;\n#endif\n${BASE_UNIFORMS}\n${this.uniforms_\n  .map(function (uniform) {\n    return 'uniform ' + uniform + ';';\n  })\n  .join('\\n')}\nattribute vec2 a_position;\nattribute float a_index;\nattribute vec2 a_segmentStart;\nattribute vec2 a_segmentEnd;\nattribute float a_parameters;\nattribute vec4 a_hitColor;\n${this.attributes_\n  .map(function (attribute) {\n    return 'attribute ' + attribute + ';';\n  })\n  .join('\\n')}\nvarying vec2 v_segmentStart;\nvarying vec2 v_segmentEnd;\nvarying float v_angleStart;\nvarying float v_angleEnd;\nvarying float v_width;\nvarying vec4 v_hitColor;\n${this.varyings_\n  .map(function (varying) {\n    return 'varying ' + varying.type + ' ' + varying.name + ';';\n  })\n  .join('\\n')}\n${this.vertexShaderFunctions_.join('\\n')}\nvec2 worldToPx(vec2 worldPos) {\n  vec4 screenPos = u_projectionMatrix * vec4(worldPos, 0.0, 1.0);\n  return (0.5 * screenPos.xy + 0.5) * u_viewportSizePx;\n}\n\nvec4 pxToScreen(vec2 pxPos) {\n  vec2 screenPos = pxPos * 4.0 / u_viewportSizePx;\n  return vec4(screenPos.xy, 0.0, 0.0);\n}\n\nvec2 getOffsetDirection(vec2 normalPx, vec2 tangentPx, float joinAngle) {\n  if (cos(joinAngle) > 0.93) return normalPx - tangentPx;\n  float halfAngle = joinAngle / 2.0;\n  vec2 angleBisectorNormal = vec2(\n    sin(halfAngle) * normalPx.x + cos(halfAngle) * normalPx.y,\n    -cos(halfAngle) * normalPx.x + sin(halfAngle) * normalPx.y\n  );\n  float length = 1.0 / sin(halfAngle);\n  return angleBisectorNormal * length;\n}\n\nvoid main(void) {\n  float lineWidth = ${this.strokeWidthExpression_};\n  float anglePrecision = 1500.0;\n  float paramShift = 10000.0;\n  v_angleStart = fract(a_parameters / paramShift) * paramShift / anglePrecision;\n  v_angleEnd = fract(floor(a_parameters / paramShift + 0.5) / paramShift) * paramShift / anglePrecision;\n  float vertexNumber = floor(a_parameters / paramShift / paramShift + 0.0001);\n  vec2 tangentPx = worldToPx(a_segmentEnd) - worldToPx(a_segmentStart);\n  tangentPx = normalize(tangentPx);\n  vec2 normalPx = vec2(-tangentPx.y, tangentPx.x);\n  float normalDir = vertexNumber < 0.5 || (vertexNumber > 1.5 && vertexNumber < 2.5) ? 1.0 : -1.0;\n  float tangentDir = vertexNumber < 1.5 ? 1.0 : -1.0;\n  float angle = vertexNumber < 1.5 ? v_angleStart : v_angleEnd;\n  vec2 offsetPx = getOffsetDirection(normalPx * normalDir, tangentDir * tangentPx, angle) * lineWidth * 0.5;\n  vec2 position =  vertexNumber < 1.5 ? a_segmentStart : a_segmentEnd;\n  gl_Position = u_projectionMatrix * vec4(position, 0.0, 1.0) + pxToScreen(offsetPx);\n  v_segmentStart = worldToPx(a_segmentStart);\n  v_segmentEnd = worldToPx(a_segmentEnd);\n  v_width = lineWidth;\n  v_hitColor = a_hitColor;\n${this.varyings_\n  .map(function (varying) {\n    return '  ' + varying.name + ' = ' + varying.expression + ';';\n  })\n  .join('\\n')}\n}`;\n  }\n\n  /**\n   * Generates a stroke fragment shader from the builder parameters\n   *\n   * @return {string|null} The full shader as a string; null if no size or color specified\n   */\n  getStrokeFragmentShader() {\n    if (!this.hasStroke_) {\n      return null;\n    }\n\n    return `#ifdef GL_FRAGMENT_PRECISION_HIGH\nprecision highp float;\n#else\nprecision mediump float;\n#endif\n${BASE_UNIFORMS}\n${this.uniforms_\n  .map(function (uniform) {\n    return 'uniform ' + uniform + ';';\n  })\n  .join('\\n')}\nvarying vec2 v_segmentStart;\nvarying vec2 v_segmentEnd;\nvarying float v_angleStart;\nvarying float v_angleEnd;\nvarying float v_width;\nvarying vec4 v_hitColor;\n${this.varyings_\n  .map(function (varying) {\n    return 'varying ' + varying.type + ' ' + varying.name + ';';\n  })\n  .join('\\n')}\n${this.fragmentShaderFunctions_.join('\\n')}\nvec2 pxToWorld(vec2 pxPos) {\n  vec2 screenPos = 2.0 * pxPos / u_viewportSizePx - 1.0;\n  return (u_screenToWorldMatrix * vec4(screenPos, 0.0, 1.0)).xy;\n}\n\nfloat segmentDistanceField(vec2 point, vec2 start, vec2 end, float radius) {\n  vec2 startToPoint = point - start;\n  vec2 startToEnd = end - start;\n  float ratio = clamp(dot(startToPoint, startToEnd) / dot(startToEnd, startToEnd), 0.0, 1.0);\n  float dist = length(startToPoint - ratio * startToEnd);\n  return 1.0 - smoothstep(radius - 1.0, radius, dist);\n}\n\nvoid main(void) {\n  vec2 v_currentPoint = gl_FragCoord.xy / u_pixelRatio;\n  #ifdef GL_FRAGMENT_PRECISION_HIGH\n  vec2 v_worldPos = pxToWorld(v_currentPoint);\n  if (\n    abs(u_renderExtent[0] - u_renderExtent[2]) > 0.0 && (\n      v_worldPos[0] < u_renderExtent[0] ||\n      v_worldPos[1] < u_renderExtent[1] ||\n      v_worldPos[0] > u_renderExtent[2] ||\n      v_worldPos[1] > u_renderExtent[3]\n    )\n  ) {\n    discard;\n  }\n  #endif\n  if (${this.discardExpression_}) { discard; }\n  gl_FragColor = ${this.strokeColorExpression_} * u_globalAlpha;\n  gl_FragColor *= segmentDistanceField(v_currentPoint, v_segmentStart, v_segmentEnd, v_width);\n  if (u_hitDetection > 0) {\n    if (gl_FragColor.a < 0.1) { discard; };\n    gl_FragColor = v_hitColor;\n  }\n}`;\n  }\n\n  /**\n   * Generates a fill vertex shader from the builder parameters\n   *\n   * @return {string|null} The full shader as a string; null if no color specified\n   */\n  getFillVertexShader() {\n    if (!this.hasFill_) {\n      return null;\n    }\n\n    return `#ifdef GL_FRAGMENT_PRECISION_HIGH\nprecision highp float;\n#else\nprecision mediump float;\n#endif\n${BASE_UNIFORMS}\n${this.uniforms_\n  .map(function (uniform) {\n    return 'uniform ' + uniform + ';';\n  })\n  .join('\\n')}\nattribute vec2 a_position;\nattribute vec4 a_hitColor;\n${this.attributes_\n  .map(function (attribute) {\n    return 'attribute ' + attribute + ';';\n  })\n  .join('\\n')}\nvarying vec4 v_hitColor;\n${this.varyings_\n  .map(function (varying) {\n    return 'varying ' + varying.type + ' ' + varying.name + ';';\n  })\n  .join('\\n')}\n${this.vertexShaderFunctions_.join('\\n')}\nvoid main(void) {\n  gl_Position = u_projectionMatrix * vec4(a_position, 0.0, 1.0);\n${this.varyings_\n  .map(function (varying) {\n    return '  ' + varying.name + ' = ' + varying.expression + ';';\n  })\n  .join('\\n')}\n}`;\n  }\n\n  /**\n   * Generates a fill fragment shader from the builder parameters\n   * @return {string|null} The full shader as a string; null if no color specified\n   */\n  getFillFragmentShader() {\n    if (!this.hasFill_) {\n      return null;\n    }\n\n    return `#ifdef GL_FRAGMENT_PRECISION_HIGH\nprecision highp float;\n#else\nprecision mediump float;\n#endif\n${BASE_UNIFORMS}\n${this.uniforms_\n  .map(function (uniform) {\n    return 'uniform ' + uniform + ';';\n  })\n  .join('\\n')}\nvarying vec4 v_hitColor;\n${this.varyings_\n  .map(function (varying) {\n    return 'varying ' + varying.type + ' ' + varying.name + ';';\n  })\n  .join('\\n')}\n${this.fragmentShaderFunctions_.join('\\n')}\nvec2 pxToWorld(vec2 pxPos) {\n  vec2 screenPos = 2.0 * pxPos / u_viewportSizePx - 1.0;\n  return (u_screenToWorldMatrix * vec4(screenPos, 0.0, 1.0)).xy;\n}\n\nvoid main(void) {\n  #ifdef GL_FRAGMENT_PRECISION_HIGH\n  vec2 v_worldPos = pxToWorld(gl_FragCoord.xy / u_pixelRatio);\n  if (\n    abs(u_renderExtent[0] - u_renderExtent[2]) > 0.0 && (\n      v_worldPos[0] < u_renderExtent[0] ||\n      v_worldPos[1] < u_renderExtent[1] ||\n      v_worldPos[0] > u_renderExtent[2] ||\n      v_worldPos[1] > u_renderExtent[3]\n    )\n  ) {\n    discard;\n  }\n  #endif\n  if (${this.discardExpression_}) { discard; }\n  gl_FragColor = ${this.fillColorExpression_} * u_globalAlpha;\n  if (u_hitDetection > 0) {\n    if (gl_FragColor.a < 0.1) { discard; };\n    gl_FragColor = v_hitColor;\n  }\n}`;\n  }\n}\n","/**\n * @module ol/render/webgl/MixedGeometryBatch\n */\nimport {getUid} from '../../util.js';\nimport {linearRingIsClockwise} from '../../geom/flat/orient.js';\n\n/**\n * @typedef {import(\"../../render/Feature\").default} RenderFeature\n */\n/**\n * @typedef {import(\"../../Feature\").default} Feature\n */\n/**\n * @typedef {import(\"../../geom/Geometry.js\").Type} GeometryType\n */\n\n/**\n * @typedef {Object} GeometryBatchItem Object that holds a reference to a feature as well as the raw coordinates of its various geometries\n * @property {Feature|RenderFeature} feature Feature\n * @property {Array<Array<number>>} flatCoordss Array of flat coordinates arrays, one for each geometry related to the feature\n * @property {number} [verticesCount] Only defined for linestring and polygon batches\n * @property {number} [ringsCount] Only defined for polygon batches\n * @property {Array<Array<number>>} [ringsVerticesCounts] Array of vertices counts in each ring for each geometry; only defined for polygons batches\n */\n\n/**\n * @typedef {PointGeometryBatch|LineStringGeometryBatch|PolygonGeometryBatch} GeometryBatch\n */\n\n/**\n * @typedef {Object} PolygonGeometryBatch A geometry batch specific to polygons\n * @property {Object<string, GeometryBatchItem>} entries Dictionary of all entries in the batch with associated computed values.\n * One entry corresponds to one feature. Key is feature uid.\n * @property {number} geometriesCount Amount of geometries in the batch.\n * @property {number} verticesCount Amount of vertices from geometries in the batch.\n * @property {number} ringsCount How many outer and inner rings in this batch.\n */\n\n/**\n * @typedef {Object} LineStringGeometryBatch A geometry batch specific to lines\n * @property {Object<string, GeometryBatchItem>} entries Dictionary of all entries in the batch with associated computed values.\n * One entry corresponds to one feature. Key is feature uid.\n * @property {number} geometriesCount Amount of geometries in the batch.\n * @property {number} verticesCount Amount of vertices from geometries in the batch.\n */\n\n/**\n * @typedef {Object} PointGeometryBatch A geometry batch specific to points\n * @property {Object<string, GeometryBatchItem>} entries Dictionary of all entries in the batch with associated computed values.\n * One entry corresponds to one feature. Key is feature uid.\n * @property {number} geometriesCount Amount of geometries in the batch.\n */\n\n/**\n * @classdesc This class is used to group several geometries of various types together for faster rendering.\n * Three inner batches are maintained for polygons, lines and points. Each time a feature is added, changed or removed\n * from the batch, these inner batches are modified accordingly in order to keep them up-to-date.\n *\n * A feature can be present in several inner batches, for example a polygon geometry will be present in the polygon batch\n * and its linear rings will be present in the line batch. Multi geometries are also broken down into individual geometries\n * and added to the corresponding batches in a recursive manner.\n *\n * Corresponding {@link module:ol/render/webgl/BatchRenderer} instances are then used to generate the render instructions\n * and WebGL buffers (vertices and indices) for each inner batches; render instructions are stored on the inner batches,\n * alongside the transform used to convert world coords to screen coords at the time these instructions were generated.\n * The resulting WebGL buffers are stored on the batches as well.\n *\n * An important aspect of geometry batches is that there is no guarantee that render instructions and WebGL buffers\n * are synchronized, i.e. render instructions can describe a new state while WebGL buffers might not have been written yet.\n * This is why two world-to-screen transforms are stored on each batch: one for the render instructions and one for\n * the WebGL buffers.\n */\nclass MixedGeometryBatch {\n  constructor() {\n    /**\n     * @type {PolygonGeometryBatch}\n     */\n    this.polygonBatch = {\n      entries: {},\n      geometriesCount: 0,\n      verticesCount: 0,\n      ringsCount: 0,\n    };\n\n    /**\n     * @type {PointGeometryBatch}\n     */\n    this.pointBatch = {\n      entries: {},\n      geometriesCount: 0,\n    };\n\n    /**\n     * @type {LineStringGeometryBatch}\n     */\n    this.lineStringBatch = {\n      entries: {},\n      geometriesCount: 0,\n      verticesCount: 0,\n    };\n  }\n\n  /**\n   * @param {Array<Feature|RenderFeature>} features Array of features to add to the batch\n   */\n  addFeatures(features) {\n    for (let i = 0; i < features.length; i++) {\n      this.addFeature(features[i]);\n    }\n  }\n\n  /**\n   * @param {Feature|RenderFeature} feature Feature to add to the batch\n   */\n  addFeature(feature) {\n    const geometry = feature.getGeometry();\n    if (!geometry) {\n      return;\n    }\n    this.addGeometry_(geometry, feature);\n  }\n\n  /**\n   * @param {Feature|RenderFeature} feature Feature\n   * @private\n   */\n  clearFeatureEntryInPointBatch_(feature) {\n    const entry = this.pointBatch.entries[getUid(feature)];\n    if (!entry) {\n      return;\n    }\n    this.pointBatch.geometriesCount -= entry.flatCoordss.length;\n    delete this.pointBatch.entries[getUid(feature)];\n  }\n\n  /**\n   * @param {Feature|RenderFeature} feature Feature\n   * @private\n   */\n  clearFeatureEntryInLineStringBatch_(feature) {\n    const entry = this.lineStringBatch.entries[getUid(feature)];\n    if (!entry) {\n      return;\n    }\n    this.lineStringBatch.verticesCount -= entry.verticesCount;\n    this.lineStringBatch.geometriesCount -= entry.flatCoordss.length;\n    delete this.lineStringBatch.entries[getUid(feature)];\n  }\n\n  /**\n   * @param {Feature|RenderFeature} feature Feature\n   * @private\n   */\n  clearFeatureEntryInPolygonBatch_(feature) {\n    const entry = this.polygonBatch.entries[getUid(feature)];\n    if (!entry) {\n      return;\n    }\n    this.polygonBatch.verticesCount -= entry.verticesCount;\n    this.polygonBatch.ringsCount -= entry.ringsCount;\n    this.polygonBatch.geometriesCount -= entry.flatCoordss.length;\n    delete this.polygonBatch.entries[getUid(feature)];\n  }\n\n  /**\n   * @param {import(\"../../geom\").Geometry|RenderFeature} geometry Geometry\n   * @param {Feature|RenderFeature} feature Feature\n   * @private\n   */\n  addGeometry_(geometry, feature) {\n    const type = geometry.getType();\n    switch (type) {\n      case 'GeometryCollection':\n        const geometries =\n          /** @type {import(\"../../geom\").GeometryCollection} */ (\n            geometry\n          ).getGeometriesArray();\n        for (const geometry of geometries) {\n          this.addGeometry_(geometry, feature);\n        }\n        break;\n      case 'MultiPolygon':\n        const multiPolygonGeom =\n          /** @type {import(\"../../geom\").MultiPolygon|RenderFeature} */ (\n            geometry\n          );\n        this.addCoordinates_(\n          type,\n          multiPolygonGeom.getFlatCoordinates(),\n          multiPolygonGeom.getEndss(),\n          feature,\n          getUid(feature)\n        );\n        break;\n      case 'MultiLineString':\n        const multiLineGeom =\n          /** @type {import(\"../../geom\").MultiLineString|RenderFeature} */ (\n            geometry\n          );\n        this.addCoordinates_(\n          type,\n          multiLineGeom.getFlatCoordinates(),\n          multiLineGeom.getEnds(),\n          feature,\n          getUid(feature)\n        );\n        break;\n      case 'MultiPoint':\n        const multiPointGeom =\n          /** @type {import(\"../../geom\").MultiPoint|RenderFeature} */ (\n            geometry\n          );\n        this.addCoordinates_(\n          type,\n          multiPointGeom.getFlatCoordinates(),\n          null,\n          feature,\n          getUid(feature)\n        );\n        break;\n      case 'Polygon':\n        const polygonGeom =\n          /** @type {import(\"../../geom\").Polygon|RenderFeature} */ (geometry);\n        this.addCoordinates_(\n          type,\n          polygonGeom.getFlatCoordinates(),\n          polygonGeom.getEnds(),\n          feature,\n          getUid(feature)\n        );\n        break;\n      case 'Point':\n        const pointGeom = /** @type {import(\"../../geom\").Point} */ (geometry);\n        this.addCoordinates_(\n          type,\n          pointGeom.getFlatCoordinates(),\n          null,\n          feature,\n          getUid(feature)\n        );\n        break;\n      case 'LineString':\n      case 'LinearRing':\n        const lineGeom = /** @type {import(\"../../geom\").LineString} */ (\n          geometry\n        );\n        this.addCoordinates_(\n          type,\n          lineGeom.getFlatCoordinates(),\n          null,\n          feature,\n          getUid(feature)\n        );\n        break;\n      default:\n      // pass\n    }\n  }\n\n  /**\n   * @param {GeometryType} type Geometry type\n   * @param {Array<number>} flatCoords Flat coordinates\n   * @param {Array<number> | Array<Array<number>> | null} ends Coordinate ends\n   * @param {Feature|RenderFeature} feature Feature\n   * @param {string} featureUid Feature uid\n   * @private\n   */\n  addCoordinates_(type, flatCoords, ends, feature, featureUid) {\n    /** @type {number} */\n    let verticesCount;\n    switch (type) {\n      case 'MultiPolygon':\n        const multiPolygonEndss = /** @type {Array<Array<number>>} */ (ends);\n        for (let i = 0, ii = multiPolygonEndss.length; i < ii; i++) {\n          let polygonEnds = multiPolygonEndss[i];\n          const prevPolygonEnds = i > 0 ? multiPolygonEndss[i - 1] : null;\n          const startIndex = prevPolygonEnds\n            ? prevPolygonEnds[prevPolygonEnds.length - 1]\n            : 0;\n          const endIndex = polygonEnds[polygonEnds.length - 1];\n          const polygonCoords = flatCoords.slice(startIndex, endIndex);\n          polygonEnds =\n            startIndex > 0\n              ? polygonEnds.map((end) => end - startIndex)\n              : polygonEnds;\n          this.addCoordinates_(\n            'Polygon',\n            polygonCoords,\n            polygonEnds,\n            feature,\n            featureUid\n          );\n        }\n        break;\n      case 'MultiLineString':\n        const multiLineEnds = /** @type {Array<number>} */ (ends);\n        for (let i = 0, ii = multiLineEnds.length; i < ii; i++) {\n          const startIndex = i > 0 ? multiLineEnds[i - 1] : 0;\n          const ringCoords = flatCoords.slice(startIndex, multiLineEnds[i]);\n          this.addCoordinates_(\n            'LinearRing',\n            ringCoords,\n            null,\n            feature,\n            featureUid\n          );\n        }\n        break;\n      case 'MultiPoint':\n        for (let i = 0, ii = flatCoords.length; i < ii; i += 2) {\n          this.addCoordinates_(\n            'Point',\n            flatCoords.slice(i, i + 2),\n            null,\n            feature,\n            featureUid\n          );\n        }\n        break;\n      case 'Polygon':\n        const polygonEnds = /** @type {Array<number>} */ (ends);\n        // first look for a CW ring; if so, handle it and following rings as another polygon\n        for (let i = 1, ii = polygonEnds.length; i < ii; i++) {\n          const ringStartIndex = polygonEnds[i - 1];\n          if (\n            i > 0 &&\n            linearRingIsClockwise(flatCoords, ringStartIndex, polygonEnds[i], 2)\n          ) {\n            this.addCoordinates_(\n              'Polygon',\n              flatCoords.slice(0, ringStartIndex),\n              polygonEnds.slice(0, i),\n              feature,\n              featureUid\n            );\n            this.addCoordinates_(\n              'Polygon',\n              flatCoords.slice(ringStartIndex),\n              polygonEnds.slice(i).map((end) => end - polygonEnds[i - 1]),\n              feature,\n              featureUid\n            );\n            return;\n          }\n        }\n        if (!this.polygonBatch.entries[featureUid]) {\n          this.polygonBatch.entries[featureUid] = {\n            feature: feature,\n            flatCoordss: [],\n            verticesCount: 0,\n            ringsCount: 0,\n            ringsVerticesCounts: [],\n          };\n        }\n        verticesCount = flatCoords.length / 2;\n        const ringsCount = ends.length;\n        const ringsVerticesCount = ends.map((end, ind, arr) =>\n          ind > 0 ? (end - arr[ind - 1]) / 2 : end / 2\n        );\n        this.polygonBatch.verticesCount += verticesCount;\n        this.polygonBatch.ringsCount += ringsCount;\n        this.polygonBatch.geometriesCount++;\n        this.polygonBatch.entries[featureUid].flatCoordss.push(flatCoords);\n        this.polygonBatch.entries[featureUid].ringsVerticesCounts.push(\n          ringsVerticesCount\n        );\n        this.polygonBatch.entries[featureUid].verticesCount += verticesCount;\n        this.polygonBatch.entries[featureUid].ringsCount += ringsCount;\n        for (let i = 0, ii = polygonEnds.length; i < ii; i++) {\n          const startIndex = i > 0 ? polygonEnds[i - 1] : 0;\n          const ringCoords = flatCoords.slice(startIndex, polygonEnds[i]);\n          this.addCoordinates_(\n            'LinearRing',\n            ringCoords,\n            null,\n            feature,\n            featureUid\n          );\n        }\n        break;\n      case 'Point':\n        if (!this.pointBatch.entries[featureUid]) {\n          this.pointBatch.entries[featureUid] = {\n            feature: feature,\n            flatCoordss: [],\n          };\n        }\n        this.pointBatch.geometriesCount++;\n        this.pointBatch.entries[featureUid].flatCoordss.push(flatCoords);\n        break;\n      case 'LineString':\n      case 'LinearRing':\n        if (!this.lineStringBatch.entries[featureUid]) {\n          this.lineStringBatch.entries[featureUid] = {\n            feature: feature,\n            flatCoordss: [],\n            verticesCount: 0,\n          };\n        }\n        verticesCount = flatCoords.length / 2;\n        this.lineStringBatch.verticesCount += verticesCount;\n        this.lineStringBatch.geometriesCount++;\n        this.lineStringBatch.entries[featureUid].flatCoordss.push(flatCoords);\n        this.lineStringBatch.entries[featureUid].verticesCount += verticesCount;\n        break;\n      default:\n      // pass\n    }\n  }\n\n  /**\n   * @param {Feature|RenderFeature} feature Feature\n   */\n  changeFeature(feature) {\n    this.clearFeatureEntryInPointBatch_(feature);\n    this.clearFeatureEntryInPolygonBatch_(feature);\n    this.clearFeatureEntryInLineStringBatch_(feature);\n    const geometry = feature.getGeometry();\n    if (!geometry) {\n      return;\n    }\n    this.addGeometry_(geometry, feature);\n  }\n\n  /**\n   * @param {Feature|RenderFeature} feature Feature\n   */\n  removeFeature(feature) {\n    this.clearFeatureEntryInPointBatch_(feature);\n    this.clearFeatureEntryInPolygonBatch_(feature);\n    this.clearFeatureEntryInLineStringBatch_(feature);\n  }\n\n  clear() {\n    this.polygonBatch.entries = {};\n    this.polygonBatch.geometriesCount = 0;\n    this.polygonBatch.verticesCount = 0;\n    this.polygonBatch.ringsCount = 0;\n    this.lineStringBatch.entries = {};\n    this.lineStringBatch.geometriesCount = 0;\n    this.lineStringBatch.verticesCount = 0;\n    this.pointBatch.entries = {};\n    this.pointBatch.geometriesCount = 0;\n  }\n}\n\nexport default MixedGeometryBatch;\n","/**\n * @module ol/webgl/TileGeometry\n */\n\nimport BaseTileRepresentation from './BaseTileRepresentation.js';\nimport MixedGeometryBatch from '../render/webgl/MixedGeometryBatch.js';\nimport {\n  create as createTransform,\n  translate as translateTransform,\n} from '../transform.js';\n\n/**\n * @typedef {import(\"../VectorRenderTile\").default} TileType\n */\n\n/**\n * @extends {BaseTileRepresentation<TileType>}\n */\nclass TileGeometry extends BaseTileRepresentation {\n  /**\n   * @param {import(\"./BaseTileRepresentation.js\").TileRepresentationOptions<TileType>} options The tile texture options.\n   * @param {Array<import(\"../render/webgl/VectorStyleRenderer.js\").default>} styleRenderers Array of vector style renderers\n   */\n  constructor(options, styleRenderers) {\n    super(options);\n\n    /**\n     * @private\n     */\n    this.batch_ = new MixedGeometryBatch();\n\n    /**\n     * @private\n     */\n    this.styleRenderers_ = styleRenderers;\n\n    /**\n     * @type {Array<import(\"../render/webgl/VectorStyleRenderer.js\").WebGLBuffers>}\n     */\n    this.buffers = [];\n\n    this.setTile(options.tile);\n  }\n\n  uploadTile() {\n    this.batch_.clear();\n    const sourceTiles = this.tile.getSourceTiles();\n    const features = sourceTiles.reduce(\n      (accumulator, sourceTile) => accumulator.concat(sourceTile.getFeatures()),\n      []\n    );\n    this.batch_.addFeatures(features);\n\n    const tileOriginX = sourceTiles[0].extent[0];\n    const tileOriginY = sourceTiles[0].extent[1];\n    const transform = translateTransform(\n      createTransform(),\n      -tileOriginX,\n      -tileOriginY\n    );\n\n    const generatePromises = this.styleRenderers_.map((renderer, i) =>\n      renderer.generateBuffers(this.batch_, transform).then((buffers) => {\n        this.buffers[i] = buffers;\n      })\n    );\n    Promise.all(generatePromises).then(() => {\n      this.setReady();\n    });\n  }\n}\n\nexport default TileGeometry;\n","/**\n * Utilities for parsing literal style objects\n * @module ol/webgl/styleparser\n */\nimport {ShaderBuilder} from './ShaderBuilder.js';\nimport {\n  ValueTypes,\n  expressionToGlsl,\n  getStringNumberEquivalent,\n  uniformNameForVariable,\n} from '../style/expressions.js';\nimport {asArray} from '../color.js';\n\n/**\n * @param {import('../style/literal.js').SymbolType} type Symbol type\n * @param {string} sizeExpressionGlsl Size expression\n * @return {string} The GLSL opacity function\n */\nexport function getSymbolOpacityGlslFunction(type, sizeExpressionGlsl) {\n  switch (type) {\n    case 'square':\n    case 'image':\n      return '1.0';\n    // taken from https://thebookofshaders.com/07/\n    case 'circle':\n      return `(1.0-smoothstep(1.-4./${sizeExpressionGlsl},1.,dot(v_quadCoord-.5,v_quadCoord-.5)*4.))`;\n    case 'triangle':\n      const st = '(v_quadCoord*2.-1.)';\n      const a = `(atan(${st}.x,${st}.y))`;\n      return `(1.0-smoothstep(.5-3./${sizeExpressionGlsl},.5,cos(floor(.5+${a}/2.094395102)*2.094395102-${a})*length(${st})))`;\n    default:\n      throw new Error(`Unexpected symbol type: ${type}`);\n  }\n}\n\n/**\n * Packs all components of a color into a two-floats array\n * @param {import(\"../color.js\").Color|string} color Color as array of numbers or string\n * @return {Array<number>} Vec2 array containing the color in compressed form\n */\nexport function packColor(color) {\n  const array = asArray(color);\n  const r = array[0] * 256;\n  const g = array[1];\n  const b = array[2] * 256;\n  const a = Math.round(array[3] * 255);\n  return [r + g, b + a];\n}\n\nconst UNPACK_COLOR_FN = `vec4 unpackColor(vec2 packedColor) {\n  return fract(packedColor[1] / 256.0) * vec4(\n    fract(floor(packedColor[0] / 256.0) / 256.0),\n    fract(packedColor[0] / 256.0),\n    fract(floor(packedColor[1] / 256.0) / 256.0),\n    1.0\n  );\n}`;\n\n/**\n * @param {ValueTypes} type Value type\n * @return {1|2|3|4} The amount of components for this value\n */\nfunction getGlslSizeFromType(type) {\n  if (type === ValueTypes.COLOR) {\n    return 2;\n  }\n  if (type === ValueTypes.NUMBER_ARRAY) {\n    return 4;\n  }\n  return 1;\n}\n\n/**\n * @param {ValueTypes} type Value type\n * @return {'float'|'vec2'|'vec3'|'vec4'} The corresponding GLSL type for this value\n */\nfunction getGlslTypeFromType(type) {\n  const size = getGlslSizeFromType(type);\n  if (size > 1) {\n    return /** @type {'vec2'|'vec3'|'vec4'} */ (`vec${size}`);\n  }\n  return 'float';\n}\n\n/**\n * @param {import(\"../style/literal\").LiteralStyle} style Style\n * @param {ShaderBuilder} builder Shader builder\n * @param {Object<string,import(\"../webgl/Helper\").UniformValue>} uniforms Uniforms\n * @param {import(\"../style/expressions.js\").ParsingContext} vertContext Vertex shader parsing context\n * @param {import(\"../style/expressions.js\").ParsingContext} fragContext Fragment shader parsing context\n */\nfunction parseSymbolProperties(\n  style,\n  builder,\n  uniforms,\n  vertContext,\n  fragContext\n) {\n  if (!('symbol' in style)) {\n    return;\n  }\n\n  const symbolStyle = style.symbol;\n  if ('color' in symbolStyle) {\n    const color = symbolStyle.color;\n    const opacity = symbolStyle.opacity !== undefined ? symbolStyle.opacity : 1;\n    const parsedColor = expressionToGlsl(fragContext, color, ValueTypes.COLOR);\n    const parsedOpacity = expressionToGlsl(\n      fragContext,\n      opacity,\n      ValueTypes.NUMBER\n    );\n    builder.setSymbolColorExpression(\n      `vec4(${parsedColor}.rgb, ${parsedColor}.a * ${parsedOpacity})`\n    );\n  }\n  if (symbolStyle.symbolType === 'image' && symbolStyle.src) {\n    const texture = new Image();\n    texture.crossOrigin =\n      symbolStyle.crossOrigin === undefined\n        ? 'anonymous'\n        : symbolStyle.crossOrigin;\n    texture.src = symbolStyle.src;\n    builder\n      .addUniform('sampler2D u_texture')\n      .setSymbolColorExpression(\n        `${builder.getSymbolColorExpression()} * texture2D(u_texture, v_texCoord)`\n      );\n    uniforms['u_texture'] = texture;\n  } else if ('symbolType' in symbolStyle) {\n    let visibleSize = builder.getSymbolSizeExpression();\n    if ('size' in symbolStyle) {\n      visibleSize = expressionToGlsl(\n        fragContext,\n        symbolStyle.size,\n        ValueTypes.NUMBER_ARRAY | ValueTypes.NUMBER\n      );\n    }\n    const symbolOpacity = getSymbolOpacityGlslFunction(\n      symbolStyle.symbolType,\n      `vec2(${visibleSize}).x`\n    );\n    builder.setSymbolColorExpression(\n      `${builder.getSymbolColorExpression()} * vec4(1.0, 1.0, 1.0, ${symbolOpacity})`\n    );\n  }\n  if ('size' in symbolStyle) {\n    const size = symbolStyle.size;\n    const parsedSize = expressionToGlsl(\n      vertContext,\n      size,\n      ValueTypes.NUMBER_ARRAY | ValueTypes.NUMBER\n    );\n    builder.setSymbolSizeExpression(`vec2(${parsedSize})`);\n  }\n  if ('textureCoord' in symbolStyle) {\n    builder.setTextureCoordinateExpression(\n      expressionToGlsl(\n        vertContext,\n        symbolStyle.textureCoord,\n        ValueTypes.NUMBER_ARRAY\n      )\n    );\n  }\n  if ('offset' in symbolStyle) {\n    builder.setSymbolOffsetExpression(\n      expressionToGlsl(vertContext, symbolStyle.offset, ValueTypes.NUMBER_ARRAY)\n    );\n  }\n  if ('rotation' in symbolStyle) {\n    builder.setSymbolRotationExpression(\n      expressionToGlsl(vertContext, symbolStyle.rotation, ValueTypes.NUMBER)\n    );\n  }\n  if ('rotateWithView' in symbolStyle) {\n    builder.setSymbolRotateWithView(!!symbolStyle.rotateWithView);\n  }\n}\n\n/**\n * @param {import(\"../style/literal\").LiteralStyle} style Style\n * @param {ShaderBuilder} builder Shader Builder\n * @param {Object<string,import(\"../webgl/Helper\").UniformValue>} uniforms Uniforms\n * @param {import(\"../style/expressions.js\").ParsingContext} vertContext Vertex shader parsing context\n * @param {import(\"../style/expressions.js\").ParsingContext} fragContext Fragment shader parsing context\n */\nfunction parseStrokeProperties(\n  style,\n  builder,\n  uniforms,\n  vertContext,\n  fragContext\n) {\n  if ('stroke-color' in style) {\n    builder.setStrokeColorExpression(\n      expressionToGlsl(fragContext, style['stroke-color'], ValueTypes.COLOR)\n    );\n  }\n\n  if ('stroke-width' in style) {\n    builder.setStrokeWidthExpression(\n      expressionToGlsl(vertContext, style['stroke-width'], ValueTypes.NUMBER)\n    );\n  }\n}\n\n/**\n * @param {import(\"../style/literal\").LiteralStyle} style Style\n * @param {ShaderBuilder} builder Shader Builder\n * @param {Object<string,import(\"../webgl/Helper\").UniformValue>} uniforms Uniforms\n * @param {import(\"../style/expressions.js\").ParsingContext} vertContext Vertex shader parsing context\n * @param {import(\"../style/expressions.js\").ParsingContext} fragContext Fragment shader parsing context\n */\nfunction parseFillProperties(\n  style,\n  builder,\n  uniforms,\n  vertContext,\n  fragContext\n) {\n  if ('fill-color' in style) {\n    builder.setFillColorExpression(\n      expressionToGlsl(fragContext, style['fill-color'], ValueTypes.COLOR)\n    );\n  }\n}\n\n/**\n * @typedef {Object} StyleParseResult\n * @property {ShaderBuilder} builder Shader builder pre-configured according to a given style\n * @property {import(\"../render/webgl/VectorStyleRenderer.js\").UniformDefinitions} uniforms Uniform definitions\n * @property {import(\"../render/webgl/VectorStyleRenderer.js\").AttributeDefinitions} attributes Attribute definitions\n */\n\n/**\n * Parses a {@link import(\"../style/literal\").LiteralStyle} object and returns a {@link ShaderBuilder}\n * object that has been configured according to the given style, as well as `attributes` and `uniforms`\n * arrays to be fed to the `WebGLPointsRenderer` class.\n *\n * Also returns `uniforms` and `attributes` properties as expected by the\n * {@link module:ol/renderer/webgl/PointsLayer~WebGLPointsLayerRenderer}.\n *\n * @param {import(\"../style/literal\").LiteralStyle} style Literal style.\n * @return {StyleParseResult} Result containing shader params, attributes and uniforms.\n */\nexport function parseLiteralStyle(style) {\n  /**\n   * @type {import(\"../style/expressions.js\").ParsingContext}\n   */\n  const vertContext = {\n    inFragmentShader: false,\n    variables: [],\n    attributes: [],\n    stringLiteralsMap: {},\n    functions: {},\n    style: style,\n  };\n\n  /**\n   * @type {import(\"../style/expressions.js\").ParsingContext}\n   */\n  const fragContext = {\n    inFragmentShader: true,\n    variables: vertContext.variables,\n    attributes: [],\n    stringLiteralsMap: vertContext.stringLiteralsMap,\n    functions: {},\n    style: style,\n  };\n\n  const builder = new ShaderBuilder();\n\n  /** @type {Object<string,import(\"../webgl/Helper\").UniformValue>} */\n  const uniforms = {};\n\n  parseSymbolProperties(style, builder, uniforms, vertContext, fragContext);\n  parseStrokeProperties(style, builder, uniforms, vertContext, fragContext);\n  parseFillProperties(style, builder, uniforms, vertContext, fragContext);\n\n  if (style.filter) {\n    const parsedFilter = expressionToGlsl(\n      fragContext,\n      style.filter,\n      ValueTypes.BOOLEAN\n    );\n    builder.setFragmentDiscardExpression(`!${parsedFilter}`);\n  }\n\n  // define one uniform per variable\n  fragContext.variables.forEach(function (variable) {\n    const uniformName = uniformNameForVariable(variable.name);\n    builder.addUniform(`${getGlslTypeFromType(variable.type)} ${uniformName}`);\n\n    let callback;\n    if (variable.type === ValueTypes.STRING) {\n      callback = () =>\n        getStringNumberEquivalent(\n          vertContext,\n          /** @type {string} */ (style.variables[variable.name])\n        );\n    } else if (variable.type === ValueTypes.COLOR) {\n      callback = () =>\n        packColor([\n          ...asArray(\n            /** @type {string|Array<number>} */ (\n              style.variables[variable.name]\n            ) || '#eee'\n          ),\n        ]);\n    } else if (variable.type === ValueTypes.BOOLEAN) {\n      callback = () =>\n        /** @type {boolean} */ (style.variables[variable.name]) ? 1.0 : 0.0;\n    } else {\n      callback = () => /** @type {number} */ (style.variables[variable.name]);\n    }\n    uniforms[uniformName] = callback;\n  });\n\n  // for each feature attribute used in the fragment shader, define a varying that will be used to pass data\n  // from the vertex to the fragment shader, as well as an attribute in the vertex shader (if not already present)\n  fragContext.attributes.forEach(function (attribute) {\n    if (!vertContext.attributes.find((a) => a.name === attribute.name)) {\n      vertContext.attributes.push(attribute);\n    }\n    let type = getGlslTypeFromType(attribute.type);\n    let expression = `a_${attribute.name}`;\n    if (attribute.type === ValueTypes.COLOR) {\n      type = 'vec4';\n      expression = `unpackColor(${expression})`;\n      builder.addVertexShaderFunction(UNPACK_COLOR_FN);\n    }\n    builder.addVarying(`v_${attribute.name}`, type, expression);\n  });\n\n  // for each feature attribute used in the vertex shader, define an attribute in the vertex shader.\n  vertContext.attributes.forEach(function (attribute) {\n    builder.addAttribute(\n      `${getGlslTypeFromType(attribute.type)} a_${attribute.name}`\n    );\n  });\n\n  const attributes = vertContext.attributes.map(function (attribute) {\n    let callback;\n    if (attribute.callback) {\n      callback = attribute.callback;\n    } else if (attribute.type === ValueTypes.STRING) {\n      callback = (feature) =>\n        getStringNumberEquivalent(vertContext, feature.get(attribute.name));\n    } else if (attribute.type === ValueTypes.COLOR) {\n      callback = (feature) =>\n        packColor([...asArray(feature.get(attribute.name) || '#eee')]);\n    } else if (attribute.type === ValueTypes.BOOLEAN) {\n      callback = (feature) => (feature.get(attribute.name) ? 1.0 : 0.0);\n    } else {\n      callback = (feature) => feature.get(attribute.name);\n    }\n\n    return {\n      name: attribute.name,\n      size: getGlslSizeFromType(attribute.type),\n      callback,\n    };\n  });\n\n  // add functions that were collected in the parsing contexts\n  for (const functionName in vertContext.functions) {\n    builder.addVertexShaderFunction(vertContext.functions[functionName]);\n  }\n  for (const functionName in fragContext.functions) {\n    builder.addFragmentShaderFunction(fragContext.functions[functionName]);\n  }\n\n  return {\n    builder: builder,\n    attributes: attributes.reduce(\n      (prev, curr) => ({\n        ...prev,\n        [curr.name]: {callback: curr.callback, size: curr.size},\n      }),\n      {}\n    ),\n    uniforms: uniforms,\n  };\n}\n","/**\n * @module ol/structs/LinkedList\n */\n\n/**\n * @typedef {Object} Item\n * @property {Item} [prev] Previous.\n * @property {Item} [next] Next.\n * @property {?} data Data.\n */\n\n/**\n * @classdesc\n * Creates an empty linked list structure.\n */\nclass LinkedList {\n  /**\n   * @param {boolean} [circular] The last item is connected to the first one,\n   * and the first item to the last one. Default is true.\n   */\n  constructor(circular) {\n    /**\n     * @private\n     * @type {Item|undefined}\n     */\n    this.first_;\n\n    /**\n     * @private\n     * @type {Item|undefined}\n     */\n    this.last_;\n\n    /**\n     * @private\n     * @type {Item|undefined}\n     */\n    this.head_;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.circular_ = circular === undefined ? true : circular;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.length_ = 0;\n  }\n\n  /**\n   * Inserts an item into the linked list right after the current one.\n   *\n   * @param {?} data Item data.\n   */\n  insertItem(data) {\n    /** @type {Item} */\n    const item = {\n      prev: undefined,\n      next: undefined,\n      data: data,\n    };\n\n    const head = this.head_;\n\n    //Initialize the list.\n    if (!head) {\n      this.first_ = item;\n      this.last_ = item;\n      if (this.circular_) {\n        item.next = item;\n        item.prev = item;\n      }\n    } else {\n      //Link the new item to the adjacent ones.\n      const next = head.next;\n      item.prev = head;\n      item.next = next;\n      head.next = item;\n      if (next) {\n        next.prev = item;\n      }\n\n      if (head === this.last_) {\n        this.last_ = item;\n      }\n    }\n    this.head_ = item;\n    this.length_++;\n  }\n\n  /**\n   * Removes the current item from the list. Sets the cursor to the next item,\n   * if possible.\n   */\n  removeItem() {\n    const head = this.head_;\n    if (head) {\n      const next = head.next;\n      const prev = head.prev;\n      if (next) {\n        next.prev = prev;\n      }\n      if (prev) {\n        prev.next = next;\n      }\n      this.head_ = next || prev;\n\n      if (this.first_ === this.last_) {\n        this.head_ = undefined;\n        this.first_ = undefined;\n        this.last_ = undefined;\n      } else if (this.first_ === head) {\n        this.first_ = this.head_;\n      } else if (this.last_ === head) {\n        this.last_ = prev ? this.head_.prev : this.head_;\n      }\n      this.length_--;\n    }\n  }\n\n  /**\n   * Sets the cursor to the first item, and returns the associated data.\n   *\n   * @return {?} Item data.\n   */\n  firstItem() {\n    this.head_ = this.first_;\n    if (this.head_) {\n      return this.head_.data;\n    }\n    return undefined;\n  }\n\n  /**\n   * Sets the cursor to the last item, and returns the associated data.\n   *\n   * @return {?} Item data.\n   */\n  lastItem() {\n    this.head_ = this.last_;\n    if (this.head_) {\n      return this.head_.data;\n    }\n    return undefined;\n  }\n\n  /**\n   * Sets the cursor to the next item, and returns the associated data.\n   *\n   * @return {?} Item data.\n   */\n  nextItem() {\n    if (this.head_ && this.head_.next) {\n      this.head_ = this.head_.next;\n      return this.head_.data;\n    }\n    return undefined;\n  }\n\n  /**\n   * Returns the next item's data without moving the cursor.\n   *\n   * @return {?} Item data.\n   */\n  getNextItem() {\n    if (this.head_ && this.head_.next) {\n      return this.head_.next.data;\n    }\n    return undefined;\n  }\n\n  /**\n   * Sets the cursor to the previous item, and returns the associated data.\n   *\n   * @return {?} Item data.\n   */\n  prevItem() {\n    if (this.head_ && this.head_.prev) {\n      this.head_ = this.head_.prev;\n      return this.head_.data;\n    }\n    return undefined;\n  }\n\n  /**\n   * Returns the previous item's data without moving the cursor.\n   *\n   * @return {?} Item data.\n   */\n  getPrevItem() {\n    if (this.head_ && this.head_.prev) {\n      return this.head_.prev.data;\n    }\n    return undefined;\n  }\n\n  /**\n   * Returns the current item's data.\n   *\n   * @return {?} Item data.\n   */\n  getCurrItem() {\n    if (this.head_) {\n      return this.head_.data;\n    }\n    return undefined;\n  }\n\n  /**\n   * Sets the first item of the list. This only works for circular lists, and sets\n   * the last item accordingly.\n   */\n  setFirstItem() {\n    if (this.circular_ && this.head_) {\n      this.first_ = this.head_;\n      this.last_ = this.head_.prev;\n    }\n  }\n\n  /**\n   * Concatenates two lists.\n   * @param {LinkedList} list List to merge into the current list.\n   */\n  concat(list) {\n    if (list.head_) {\n      if (this.head_) {\n        const end = this.head_.next;\n        this.head_.next = list.first_;\n        list.first_.prev = this.head_;\n        end.prev = list.last_;\n        list.last_.next = end;\n        this.length_ += list.length_;\n      } else {\n        this.head_ = list.head_;\n        this.first_ = list.first_;\n        this.last_ = list.last_;\n        this.length_ = list.length_;\n      }\n      list.head_ = undefined;\n      list.first_ = undefined;\n      list.last_ = undefined;\n      list.length_ = 0;\n    }\n  }\n\n  /**\n   * Returns the current length of the list.\n   *\n   * @return {number} Length.\n   */\n  getLength() {\n    return this.length_;\n  }\n}\n\nexport default LinkedList;\n","/**\n * @module ol/source/ogcTileUtil\n */\n\nimport TileGrid from '../tilegrid/TileGrid.js';\nimport {getJSON, resolveUrl} from '../net.js';\nimport {get as getProjection} from '../proj.js';\nimport {getIntersection as intersectExtents} from '../extent.js';\n\n/**\n * See https://ogcapi.ogc.org/tiles/.\n */\n\n/**\n * @typedef {'map' | 'vector'} TileType\n */\n\n/**\n * @typedef {'topLeft' | 'bottomLeft'} CornerOfOrigin\n */\n\n/**\n * @typedef {Object} TileSet\n * @property {TileType} dataType Type of data represented in the tileset.\n * @property {string} [tileMatrixSetDefinition] Reference to a tile matrix set definition.\n * @property {TileMatrixSet} [tileMatrixSet] Tile matrix set definition.\n * @property {Array<TileMatrixSetLimit>} [tileMatrixSetLimits] Tile matrix set limits.\n * @property {Array<Link>} links Tileset links.\n */\n\n/**\n * @typedef {Object} Link\n * @property {string} rel The link rel attribute.\n * @property {string} href The link URL.\n * @property {string} type The link type.\n */\n\n/**\n * @typedef {Object} TileMatrixSetLimit\n * @property {string} tileMatrix The tile matrix id.\n * @property {number} minTileRow The minimum tile row.\n * @property {number} maxTileRow The maximum tile row.\n * @property {number} minTileCol The minimum tile column.\n * @property {number} maxTileCol The maximum tile column.\n */\n\n/**\n * @typedef {Object} TileMatrixSet\n * @property {string} id The tile matrix set identifier.\n * @property {string} crs The coordinate reference system.\n * @property {Array<TileMatrix>} tileMatrices Array of tile matrices.\n */\n\n/**\n * @typedef {Object} TileMatrix\n * @property {string} id The tile matrix identifier.\n * @property {number} cellSize The pixel resolution (map units per pixel).\n * @property {Array<number>} pointOfOrigin The map location of the matrix origin.\n * @property {CornerOfOrigin} [cornerOfOrigin='topLeft'] The corner of the matrix that represents the origin ('topLeft' or 'bottomLeft').\n * @property {number} matrixWidth The number of columns.\n * @property {number} matrixHeight The number of rows.\n * @property {number} tileWidth The pixel width of a tile.\n * @property {number} tileHeight The pixel height of a tile.\n */\n\n/**\n * @type {Object<string, boolean>}\n */\nconst knownMapMediaTypes = {\n  'image/png': true,\n  'image/jpeg': true,\n  'image/gif': true,\n  'image/webp': true,\n};\n\n/**\n * @type {Object<string, boolean>}\n */\nconst knownVectorMediaTypes = {\n  'application/vnd.mapbox-vector-tile': true,\n  'application/geo+json': true,\n};\n\n/**\n * @typedef {Object} TileSetInfo\n * @property {string} urlTemplate The tile URL template.\n * @property {import(\"../tilegrid/TileGrid.js\").default} grid The tile grid.\n * @property {import(\"../Tile.js\").UrlFunction} urlFunction The tile URL function.\n */\n\n/**\n * @typedef {Object} SourceInfo\n * @property {string} url The tile set URL.\n * @property {string} mediaType The preferred tile media type.\n * @property {Array<string>} [supportedMediaTypes] The supported media types.\n * @property {import(\"../proj/Projection.js\").default} projection The source projection.\n * @property {Object} [context] Optional context for constructing the URL.\n */\n\n/**\n * @param {Array<Link>} links Tileset links.\n * @param {string} [mediaType] The preferred media type.\n * @return {string} The tile URL template.\n */\nexport function getMapTileUrlTemplate(links, mediaType) {\n  let tileUrlTemplate;\n  let fallbackUrlTemplate;\n  for (let i = 0; i < links.length; ++i) {\n    const link = links[i];\n    if (link.rel === 'item') {\n      if (link.type === mediaType) {\n        tileUrlTemplate = link.href;\n        break;\n      }\n      if (knownMapMediaTypes[link.type]) {\n        fallbackUrlTemplate = link.href;\n      } else if (!fallbackUrlTemplate && link.type.startsWith('image/')) {\n        fallbackUrlTemplate = link.href;\n      }\n    }\n  }\n\n  if (!tileUrlTemplate) {\n    if (fallbackUrlTemplate) {\n      tileUrlTemplate = fallbackUrlTemplate;\n    } else {\n      throw new Error('Could not find \"item\" link');\n    }\n  }\n\n  return tileUrlTemplate;\n}\n\n/**\n * @param {Array<Link>} links Tileset links.\n * @param {string} [mediaType] The preferred media type.\n * @param {Array<string>} [supportedMediaTypes] The media types supported by the parser.\n * @return {string} The tile URL template.\n */\nexport function getVectorTileUrlTemplate(\n  links,\n  mediaType,\n  supportedMediaTypes\n) {\n  let tileUrlTemplate;\n  let fallbackUrlTemplate;\n\n  /**\n   * Lookup of URL by media type.\n   * @type {Object<string, string>}\n   */\n  const hrefLookup = {};\n\n  for (let i = 0; i < links.length; ++i) {\n    const link = links[i];\n    hrefLookup[link.type] = link.href;\n    if (link.rel === 'item') {\n      if (link.type === mediaType) {\n        tileUrlTemplate = link.href;\n        break;\n      }\n      if (knownVectorMediaTypes[link.type]) {\n        fallbackUrlTemplate = link.href;\n      }\n    }\n  }\n\n  if (!tileUrlTemplate && supportedMediaTypes) {\n    for (let i = 0; i < supportedMediaTypes.length; ++i) {\n      const supportedMediaType = supportedMediaTypes[i];\n      if (hrefLookup[supportedMediaType]) {\n        tileUrlTemplate = hrefLookup[supportedMediaType];\n        break;\n      }\n    }\n  }\n\n  if (!tileUrlTemplate) {\n    if (fallbackUrlTemplate) {\n      tileUrlTemplate = fallbackUrlTemplate;\n    } else {\n      throw new Error('Could not find \"item\" link');\n    }\n  }\n\n  return tileUrlTemplate;\n}\n\n/**\n * @param {SourceInfo} sourceInfo The source info.\n * @param {TileMatrixSet} tileMatrixSet Tile matrix set.\n * @param {string} tileUrlTemplate Tile URL template.\n * @param {Array<TileMatrixSetLimit>} [tileMatrixSetLimits] Tile matrix set limits.\n * @return {TileSetInfo} Tile set info.\n */\nfunction parseTileMatrixSet(\n  sourceInfo,\n  tileMatrixSet,\n  tileUrlTemplate,\n  tileMatrixSetLimits\n) {\n  let projection = sourceInfo.projection;\n  if (!projection) {\n    projection = getProjection(tileMatrixSet.crs);\n    if (!projection) {\n      throw new Error(`Unsupported CRS: ${tileMatrixSet.crs}`);\n    }\n  }\n  const backwards = projection.getAxisOrientation().substr(0, 2) !== 'en';\n\n  const matrices = tileMatrixSet.tileMatrices;\n\n  /**\n   * @type {Object<string, TileMatrix>}\n   */\n  const matrixLookup = {};\n  for (let i = 0; i < matrices.length; ++i) {\n    const matrix = matrices[i];\n    matrixLookup[matrix.id] = matrix;\n  }\n\n  /**\n   * @type {Object<string, TileMatrixSetLimit>}\n   */\n  const limitLookup = {};\n\n  /**\n   * @type {Array<string>}\n   */\n  const matrixIds = [];\n\n  if (tileMatrixSetLimits) {\n    for (let i = 0; i < tileMatrixSetLimits.length; ++i) {\n      const limit = tileMatrixSetLimits[i];\n      const id = limit.tileMatrix;\n      matrixIds.push(id);\n      limitLookup[id] = limit;\n    }\n  } else {\n    for (let i = 0; i < matrices.length; ++i) {\n      const id = matrices[i].id;\n      matrixIds.push(id);\n    }\n  }\n\n  const length = matrixIds.length;\n  const origins = new Array(length);\n  const resolutions = new Array(length);\n  const sizes = new Array(length);\n  const tileSizes = new Array(length);\n  const extent = [-Infinity, -Infinity, Infinity, Infinity];\n\n  for (let i = 0; i < length; ++i) {\n    const id = matrixIds[i];\n    const matrix = matrixLookup[id];\n    const origin = matrix.pointOfOrigin;\n    if (backwards) {\n      origins[i] = [origin[1], origin[0]];\n    } else {\n      origins[i] = origin;\n    }\n    resolutions[i] = matrix.cellSize;\n    sizes[i] = [matrix.matrixWidth, matrix.matrixHeight];\n    tileSizes[i] = [matrix.tileWidth, matrix.tileHeight];\n    const limit = limitLookup[id];\n    if (limit) {\n      const tileMapWidth = matrix.cellSize * matrix.tileWidth;\n      const minX = origins[i][0] + limit.minTileCol * tileMapWidth;\n      const maxX = origins[i][0] + (limit.maxTileCol + 1) * tileMapWidth;\n\n      const tileMapHeight = matrix.cellSize * matrix.tileHeight;\n      const upsideDown = matrix.cornerOfOrigin === 'bottomLeft';\n\n      let minY;\n      let maxY;\n      if (upsideDown) {\n        minY = origins[i][1] + limit.minTileRow * tileMapHeight;\n        maxY = origins[i][1] + (limit.maxTileRow + 1) * tileMapHeight;\n      } else {\n        minY = origins[i][1] - (limit.maxTileRow + 1) * tileMapHeight;\n        maxY = origins[i][1] - limit.minTileRow * tileMapHeight;\n      }\n\n      intersectExtents(extent, [minX, minY, maxX, maxY], extent);\n    }\n  }\n\n  const tileGrid = new TileGrid({\n    origins: origins,\n    resolutions: resolutions,\n    sizes: sizes,\n    tileSizes: tileSizes,\n    extent: tileMatrixSetLimits ? extent : undefined,\n  });\n\n  const context = sourceInfo.context;\n  const base = sourceInfo.url;\n\n  function tileUrlFunction(tileCoord, pixelRatio, projection) {\n    if (!tileCoord) {\n      return undefined;\n    }\n\n    const id = matrixIds[tileCoord[0]];\n    const matrix = matrixLookup[id];\n    const upsideDown = matrix.cornerOfOrigin === 'bottomLeft';\n\n    const localContext = {\n      tileMatrix: id,\n      tileCol: tileCoord[1],\n      tileRow: upsideDown ? -tileCoord[2] - 1 : tileCoord[2],\n    };\n\n    if (tileMatrixSetLimits) {\n      const limit = limitLookup[matrix.id];\n      if (\n        localContext.tileCol < limit.minTileCol ||\n        localContext.tileCol > limit.maxTileCol ||\n        localContext.tileRow < limit.minTileRow ||\n        localContext.tileRow > limit.maxTileRow\n      ) {\n        return undefined;\n      }\n    }\n\n    Object.assign(localContext, context);\n\n    const url = tileUrlTemplate.replace(/\\{(\\w+?)\\}/g, function (m, p) {\n      return localContext[p];\n    });\n\n    return resolveUrl(base, url);\n  }\n\n  return {\n    grid: tileGrid,\n    urlTemplate: tileUrlTemplate,\n    urlFunction: tileUrlFunction,\n  };\n}\n\n/**\n * @param {SourceInfo} sourceInfo The source info.\n * @param {TileSet} tileSet Tile set.\n * @return {TileSetInfo|Promise<TileSetInfo>} Tile set info.\n */\nfunction parseTileSetMetadata(sourceInfo, tileSet) {\n  const tileMatrixSetLimits = tileSet.tileMatrixSetLimits;\n  let tileUrlTemplate;\n\n  if (tileSet.dataType === 'map') {\n    tileUrlTemplate = getMapTileUrlTemplate(\n      tileSet.links,\n      sourceInfo.mediaType\n    );\n  } else if (tileSet.dataType === 'vector') {\n    tileUrlTemplate = getVectorTileUrlTemplate(\n      tileSet.links,\n      sourceInfo.mediaType,\n      sourceInfo.supportedMediaTypes\n    );\n  } else {\n    throw new Error('Expected tileset data type to be \"map\" or \"vector\"');\n  }\n\n  if (tileSet.tileMatrixSet) {\n    return parseTileMatrixSet(\n      sourceInfo,\n      tileSet.tileMatrixSet,\n      tileUrlTemplate,\n      tileMatrixSetLimits\n    );\n  }\n\n  const tileMatrixSetLink = tileSet.links.find(\n    (link) =>\n      link.rel === 'http://www.opengis.net/def/rel/ogc/1.0/tiling-scheme'\n  );\n  if (!tileMatrixSetLink) {\n    throw new Error(\n      'Expected http://www.opengis.net/def/rel/ogc/1.0/tiling-scheme link or tileMatrixSet'\n    );\n  }\n  const tileMatrixSetDefinition = tileMatrixSetLink.href;\n\n  const url = resolveUrl(sourceInfo.url, tileMatrixSetDefinition);\n  return getJSON(url).then(function (tileMatrixSet) {\n    return parseTileMatrixSet(\n      sourceInfo,\n      tileMatrixSet,\n      tileUrlTemplate,\n      tileMatrixSetLimits\n    );\n  });\n}\n\n/**\n * @param {SourceInfo} sourceInfo Source info.\n * @return {Promise<TileSetInfo>} Tile set info.\n */\nexport function getTileSetInfo(sourceInfo) {\n  return getJSON(sourceInfo.url).then(function (tileSet) {\n    return parseTileSetMetadata(sourceInfo, tileSet);\n  });\n}\n","/**\n * @module ol/source/OGCMapTile\n */\nimport TileImage from './TileImage.js';\nimport {getTileSetInfo} from './ogcTileUtil.js';\nimport {error as logError} from '../console.js';\n\n/**\n * @typedef {Object} Options\n * @property {string} url URL to the OGC Map Tileset endpoint.\n * @property {Object} [context] A lookup of values to use in the tile URL template.  The `{tileMatrix}`\n * (zoom level), `{tileRow}`, and `{tileCol}` variables in the URL will always be provided by the source.\n * @property {string} [mediaType] The content type for the tiles (e.g. \"image/png\").  If not provided,\n * the source will try to find a link with rel=\"item\" that uses a supported image type.\n * @property {import(\"../proj.js\").ProjectionLike} [projection] Projection. By default, the projection\n * will be derived from the `crs` of the `tileMatrixSet`.  You can override this by supplying\n * a projection to the constructor.\n * @property {import(\"./Source.js\").AttributionLike} [attributions] Attributions.\n * @property {number} [cacheSize] Tile cache size. The default depends on the screen size. Will be ignored if too small.\n * @property {null|string} [crossOrigin] The `crossOrigin` attribute for loaded images.  Note that\n * you must provide a `crossOrigin` value if you want to access pixel data with the Canvas renderer.\n * See https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image for more detail.\n * @property {boolean} [interpolate=true] Use interpolated values when resampling.  By default,\n * linear interpolation is used when resampling.  Set to false to use the nearest neighbor instead.\n * @property {number} [reprojectionErrorThreshold=0.5] Maximum allowed reprojection error (in pixels).\n * Higher values can increase reprojection performance, but decrease precision.\n * @property {import(\"../Tile.js\").LoadFunction} [tileLoadFunction] Optional function to load a tile given a URL. The default is\n * ```js\n * function(tile, src) {\n *   tile.getImage().src = src;\n * };\n * ```\n * @property {boolean} [wrapX=true] Whether to wrap the world horizontally.\n * @property {number} [transition] Duration of the opacity transition for rendering.\n * To disable the opacity transition, pass `transition: 0`.\n */\n\n/**\n * @classdesc\n * Layer source for map tiles from an [OGC API - Tiles](https://ogcapi.ogc.org/tiles/) service that provides \"map\" type tiles.\n * The service must conform to at least the core (http://www.opengis.net/spec/ogcapi-tiles-1/1.0/conf/core)\n * and tileset (http://www.opengis.net/spec/ogcapi-tiles-1/1.0/conf/tileset) conformance classes.\n * @api\n */\nclass OGCMapTile extends TileImage {\n  /**\n   * @param {Options} options OGC map tile options.\n   */\n  constructor(options) {\n    super({\n      attributions: options.attributions,\n      cacheSize: options.cacheSize,\n      crossOrigin: options.crossOrigin,\n      interpolate: options.interpolate,\n      projection: options.projection,\n      reprojectionErrorThreshold: options.reprojectionErrorThreshold,\n      state: 'loading',\n      tileLoadFunction: options.tileLoadFunction,\n      wrapX: options.wrapX !== undefined ? options.wrapX : true,\n      transition: options.transition,\n    });\n\n    const sourceInfo = {\n      url: options.url,\n      projection: this.getProjection(),\n      mediaType: options.mediaType,\n      context: options.context || null,\n    };\n\n    getTileSetInfo(sourceInfo)\n      .then(this.handleTileSetInfo_.bind(this))\n      .catch(this.handleError_.bind(this));\n  }\n\n  /**\n   * @param {import(\"./ogcTileUtil.js\").TileSetInfo} tileSetInfo Tile set info.\n   * @private\n   */\n  handleTileSetInfo_(tileSetInfo) {\n    this.tileGrid = tileSetInfo.grid;\n    this.setTileUrlFunction(tileSetInfo.urlFunction, tileSetInfo.urlTemplate);\n    this.setState('ready');\n  }\n\n  /**\n   * @private\n   * @param {Error} error The error.\n   */\n  handleError_(error) {\n    logError(error);\n    this.setState('error');\n  }\n}\n\nexport default OGCMapTile;\n","/**\n * @module ol/source/OGCVectorTile\n */\n\nimport VectorTile from './VectorTile.js';\nimport {getTileSetInfo} from './ogcTileUtil.js';\nimport {error as logError} from '../console.js';\n\n/**\n * @typedef {Object} Options\n * @property {string} url URL to the OGC Vector Tileset endpoint.\n * @property {Object} [context] A lookup of values to use in the tile URL template.  The `{tileMatrix}`\n * (zoom level), `{tileRow}`, and `{tileCol}` variables in the URL will always be provided by the source.\n * @property {import(\"../format/Feature.js\").default} format Feature parser for tiles.\n * @property {string} [mediaType] The content type for the tiles (e.g. \"application/vnd.mapbox-vector-tile\").  If not provided,\n * the source will try to find a link with rel=\"item\" that uses a vector type supported by the configured format.\n * @property {import(\"./Source.js\").AttributionLike} [attributions] Attributions.\n * @property {boolean} [attributionsCollapsible=true] Attributions are collapsible.\n * @property {number} [cacheSize] Initial tile cache size. Will auto-grow to hold at least twice the number of tiles in the viewport.\n * @property {boolean} [overlaps=true] This source may have overlapping geometries. Setting this\n * to `false` (e.g. for sources with polygons that represent administrative\n * boundaries or TopoJSON sources) allows the renderer to optimise fill and\n * stroke operations.\n * @property {import(\"../proj.js\").ProjectionLike} [projection='EPSG:3857'] Projection of the tile grid.\n * @property {typeof import(\"../VectorTile.js\").default} [tileClass] Class used to instantiate image tiles.\n * Default is {@link module:ol/VectorTile~VectorTile}.\n * @property {number} [transition] A duration for tile opacity\n * transitions in milliseconds. A duration of 0 disables the opacity transition.\n * @property {boolean} [wrapX=true] Whether to wrap the world horizontally.\n * When set to `false`, only one world\n * will be rendered. When set to `true`, tiles will be wrapped horizontally to\n * render multiple worlds.\n * @property {number|import(\"../array.js\").NearestDirectionFunction} [zDirection=1]\n * Choose whether to use tiles with a higher or lower zoom level when between integer\n * zoom levels. See {@link module:ol/tilegrid/TileGrid~TileGrid#getZForResolution}.\n */\n\n/**\n * @classdesc\n * Layer source for map tiles from an [OGC API - Tiles](https://ogcapi.ogc.org/tiles/) service that provides \"vector\" type tiles.\n * The service must conform to at least the core (http://www.opengis.net/spec/ogcapi-tiles-1/1.0/conf/core)\n * and tileset (http://www.opengis.net/spec/ogcapi-tiles-1/1.0/conf/tileset) conformance classes.\n *\n * Vector tile sets may come in a variety of formats (e.g. GeoJSON, MVT).  The `format` option is used to determine\n * which of the advertised media types is used.  If you need to force the use of a particular media type, you can\n * provide the `mediaType` option.\n * @api\n */\nclass OGCVectorTile extends VectorTile {\n  /**\n   * @param {Options} options OGC vector tile options.\n   */\n  constructor(options) {\n    super({\n      attributions: options.attributions,\n      attributionsCollapsible: options.attributionsCollapsible,\n      cacheSize: options.cacheSize,\n      format: options.format,\n      overlaps: options.overlaps,\n      projection: options.projection,\n      tileClass: options.tileClass,\n      transition: options.transition,\n      wrapX: options.wrapX,\n      zDirection: options.zDirection,\n      state: 'loading',\n    });\n\n    const sourceInfo = {\n      url: options.url,\n      projection: this.getProjection(),\n      mediaType: options.mediaType,\n      supportedMediaTypes: options.format.supportedMediaTypes,\n      context: options.context || null,\n    };\n\n    getTileSetInfo(sourceInfo)\n      .then(this.handleTileSetInfo_.bind(this))\n      .catch(this.handleError_.bind(this));\n  }\n\n  /**\n   * @param {import(\"./ogcTileUtil.js\").TileSetInfo} tileSetInfo Tile set info.\n   * @private\n   */\n  handleTileSetInfo_(tileSetInfo) {\n    this.tileGrid = tileSetInfo.grid;\n    this.setTileUrlFunction(tileSetInfo.urlFunction, tileSetInfo.urlTemplate);\n    this.setState('ready');\n  }\n\n  /**\n   * @private\n   * @param {Error} error The error.\n   */\n  handleError_(error) {\n    logError(error);\n    this.setState('error');\n  }\n}\n\nexport default OGCVectorTile;\n","/**\n * @module ol/source/common\n */\n\n/**\n * Default WMS version.\n * @type {string}\n */\nexport const DEFAULT_WMS_VERSION = '1.3.0';\n","/**\n * @module ol/layer/BaseVector\n */\nimport Layer from './Layer.js';\nimport RBush from 'rbush';\nimport Style, {\n  createDefaultStyle,\n  toFunction as toStyleFunction,\n} from '../style/Style.js';\nimport {toStyle} from '../style/flat.js';\n\n/**\n * @template {import(\"../source/Vector.js\").default|import(\"../source/VectorTile.js\").default} VectorSourceType\n * @typedef {Object} Options\n * @property {string} [className='ol-layer'] A CSS class name to set to the layer element.\n * @property {number} [opacity=1] Opacity (0, 1).\n * @property {boolean} [visible=true] Visibility.\n * @property {import(\"../extent.js\").Extent} [extent] The bounding extent for layer rendering.  The layer will not be\n * rendered outside of this extent.\n * @property {number} [zIndex] The z-index for layer rendering.  At rendering time, the layers\n * will be ordered, first by Z-index and then by position. When `undefined`, a `zIndex` of 0 is assumed\n * for layers that are added to the map's `layers` collection, or `Infinity` when the layer's `setMap()`\n * method was used.\n * @property {number} [minResolution] The minimum resolution (inclusive) at which this layer will be\n * visible.\n * @property {number} [maxResolution] The maximum resolution (exclusive) below which this layer will\n * be visible.\n * @property {number} [minZoom] The minimum view zoom level (exclusive) above which this layer will be\n * visible.\n * @property {number} [maxZoom] The maximum view zoom level (inclusive) at which this layer will\n * be visible.\n * @property {import(\"../render.js\").OrderFunction} [renderOrder] Render order. Function to be used when sorting\n * features before rendering. By default features are drawn in the order that they are created. Use\n * `null` to avoid the sort, but get an undefined draw order.\n * @property {number} [renderBuffer=100] The buffer in pixels around the viewport extent used by the\n * renderer when getting features from the vector source for the rendering or hit-detection.\n * Recommended value: the size of the largest symbol, line width or label.\n * @property {VectorSourceType} [source] Source.\n * @property {import(\"../Map.js\").default} [map] Sets the layer as overlay on a map. The map will not manage\n * this layer in its layers collection, and the layer will be rendered on top. This is useful for\n * temporary layers. The standard way to add a layer to a map and have it managed by the map is to\n * use [map.addLayer()]{@link import(\"../Map.js\").default#addLayer}.\n * @property {boolean} [declutter=false] Declutter images and text. Decluttering is applied to all\n * image and text styles of all Vector and VectorTile layers that have set this to `true`. The priority\n * is defined by the z-index of the layer, the `zIndex` of the style and the render order of features.\n * Higher z-index means higher priority. Within the same z-index, a feature rendered before another has\n * higher priority.\n *\n * As an optimization decluttered features from layers with the same `className` are rendered above\n * the fill and stroke styles of all of those layers regardless of z-index.  To opt out of this\n * behavior and place declutterd features with their own layer configure the layer with a `className`\n * other than `ol-layer`.\n * @property {import(\"../style/Style.js\").StyleLike|import(\"../style/flat.js\").FlatStyleLike|null} [style] Layer style. When set to `null`, only\n * features that have their own style will be rendered. See {@link module:ol/style/Style~Style} for the default style\n * which will be used if this is not set.\n * @property {import(\"./Base.js\").BackgroundColor} [background] Background color for the layer. If not specified, no background\n * will be rendered.\n * @property {boolean} [updateWhileAnimating=false] When set to `true`, feature batches will\n * be recreated during animations. This means that no vectors will be shown clipped, but the\n * setting will have a performance impact for large amounts of vector data. When set to `false`,\n * batches will be recreated when no animation is active.\n * @property {boolean} [updateWhileInteracting=false] When set to `true`, feature batches will\n * be recreated during interactions. See also `updateWhileAnimating`.\n * @property {Object<string, *>} [properties] Arbitrary observable properties. Can be accessed with `#get()` and `#set()`.\n */\n\n/**\n * @enum {string}\n * @private\n */\nconst Property = {\n  RENDER_ORDER: 'renderOrder',\n};\n\n/**\n * @classdesc\n * Vector data that is rendered client-side.\n * Note that any property set in the options is set as a {@link module:ol/Object~BaseObject}\n * property on the layer object; for example, setting `title: 'My Title'` in the\n * options means that `title` is observable, and has get/set accessors.\n *\n * @template {import(\"../source/Vector.js\").default|import(\"../source/VectorTile.js\").default} VectorSourceType\n * @template {import(\"../renderer/canvas/VectorLayer.js\").default|import(\"../renderer/canvas/VectorTileLayer.js\").default|import(\"../renderer/canvas/VectorImageLayer.js\").default|import(\"../renderer/webgl/PointsLayer.js\").default} RendererType\n * @extends {Layer<VectorSourceType, RendererType>}\n * @api\n */\nclass BaseVectorLayer extends Layer {\n  /**\n   * @param {Options<VectorSourceType>} [options] Options.\n   */\n  constructor(options) {\n    options = options ? options : {};\n\n    const baseOptions = Object.assign({}, options);\n\n    delete baseOptions.style;\n    delete baseOptions.renderBuffer;\n    delete baseOptions.updateWhileAnimating;\n    delete baseOptions.updateWhileInteracting;\n    super(baseOptions);\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.declutter_ =\n      options.declutter !== undefined ? options.declutter : false;\n\n    /**\n     * @type {number}\n     * @private\n     */\n    this.renderBuffer_ =\n      options.renderBuffer !== undefined ? options.renderBuffer : 100;\n\n    /**\n     * User provided style.\n     * @type {import(\"../style/Style.js\").StyleLike}\n     * @private\n     */\n    this.style_ = null;\n\n    /**\n     * Style function for use within the library.\n     * @type {import(\"../style/Style.js\").StyleFunction|undefined}\n     * @private\n     */\n    this.styleFunction_ = undefined;\n\n    this.setStyle(options.style);\n\n    /**\n     * @type {boolean}\n     * @private\n     */\n    this.updateWhileAnimating_ =\n      options.updateWhileAnimating !== undefined\n        ? options.updateWhileAnimating\n        : false;\n\n    /**\n     * @type {boolean}\n     * @private\n     */\n    this.updateWhileInteracting_ =\n      options.updateWhileInteracting !== undefined\n        ? options.updateWhileInteracting\n        : false;\n  }\n\n  /**\n   * @return {boolean} Declutter.\n   */\n  getDeclutter() {\n    return this.declutter_;\n  }\n\n  /**\n   * Get the topmost feature that intersects the given pixel on the viewport. Returns a promise\n   * that resolves with an array of features. The array will either contain the topmost feature\n   * when a hit was detected, or it will be empty.\n   *\n   * The hit detection algorithm used for this method is optimized for performance, but is less\n   * accurate than the one used in [map.getFeaturesAtPixel()]{@link import(\"../Map.js\").default#getFeaturesAtPixel}.\n   * Text is not considered, and icons are only represented by their bounding box instead of the exact\n   * image.\n   *\n   * @param {import(\"../pixel.js\").Pixel} pixel Pixel.\n   * @return {Promise<Array<import(\"../Feature\").FeatureLike>>} Promise that resolves with an array of features.\n   * @api\n   */\n  getFeatures(pixel) {\n    return super.getFeatures(pixel);\n  }\n\n  /**\n   * @return {number|undefined} Render buffer.\n   */\n  getRenderBuffer() {\n    return this.renderBuffer_;\n  }\n\n  /**\n   * @return {function(import(\"../Feature.js\").default, import(\"../Feature.js\").default): number|null|undefined} Render\n   *     order.\n   */\n  getRenderOrder() {\n    return /** @type {import(\"../render.js\").OrderFunction|null|undefined} */ (\n      this.get(Property.RENDER_ORDER)\n    );\n  }\n\n  /**\n   * Get the style for features.  This returns whatever was passed to the `style`\n   * option at construction or to the `setStyle` method.\n   * @return {import(\"../style/Style.js\").StyleLike|null|undefined} Layer style.\n   * @api\n   */\n  getStyle() {\n    return this.style_;\n  }\n\n  /**\n   * Get the style function.\n   * @return {import(\"../style/Style.js\").StyleFunction|undefined} Layer style function.\n   * @api\n   */\n  getStyleFunction() {\n    return this.styleFunction_;\n  }\n\n  /**\n   * @return {boolean} Whether the rendered layer should be updated while\n   *     animating.\n   */\n  getUpdateWhileAnimating() {\n    return this.updateWhileAnimating_;\n  }\n\n  /**\n   * @return {boolean} Whether the rendered layer should be updated while\n   *     interacting.\n   */\n  getUpdateWhileInteracting() {\n    return this.updateWhileInteracting_;\n  }\n\n  /**\n   * Render declutter items for this layer\n   * @param {import(\"../Map.js\").FrameState} frameState Frame state.\n   */\n  renderDeclutter(frameState) {\n    if (!frameState.declutterTree) {\n      frameState.declutterTree = new RBush(9);\n    }\n    /** @type {*} */ (this.getRenderer()).renderDeclutter(frameState);\n  }\n\n  /**\n   * @param {import(\"../render.js\").OrderFunction|null|undefined} renderOrder\n   *     Render order.\n   */\n  setRenderOrder(renderOrder) {\n    this.set(Property.RENDER_ORDER, renderOrder);\n  }\n\n  /**\n   * Set the style for features.  This can be a single style object, an array\n   * of styles, or a function that takes a feature and resolution and returns\n   * an array of styles. If set to `null`, the layer has no style (a `null` style),\n   * so only features that have their own styles will be rendered in the layer. Call\n   * `setStyle()` without arguments to reset to the default style. See\n   * [the ol/style/Style module]{@link module:ol/style/Style~Style} for information on the default style.\n   *\n   * If your layer has a static style, you can use [flat style]{@link module:ol/style/flat~FlatStyle} object\n   * literals instead of using the `Style` and symbolizer constructors (`Fill`, `Stroke`, etc.):\n   * ```js\n   * vectorLayer.setStyle({\n   *   \"fill-color\": \"yellow\",\n   *   \"stroke-color\": \"black\",\n   *   \"stroke-width\": 4\n   * })\n   * ```\n   *\n   * @param {import(\"../style/Style.js\").StyleLike|import(\"../style/flat.js\").FlatStyleLike|null} [style] Layer style.\n   * @api\n   */\n  setStyle(style) {\n    /**\n     * @type {import(\"../style/Style.js\").StyleLike|null}\n     */\n    let styleLike;\n\n    if (style === undefined) {\n      styleLike = createDefaultStyle;\n    } else if (style === null) {\n      styleLike = null;\n    } else if (typeof style === 'function') {\n      styleLike = style;\n    } else if (style instanceof Style) {\n      styleLike = style;\n    } else if (Array.isArray(style)) {\n      const len = style.length;\n\n      /**\n       * @type {Array<Style>}\n       */\n      const styles = new Array(len);\n\n      for (let i = 0; i < len; ++i) {\n        const s = style[i];\n        if (s instanceof Style) {\n          styles[i] = s;\n        } else {\n          styles[i] = toStyle(s);\n        }\n      }\n      styleLike = styles;\n    } else {\n      styleLike = toStyle(style);\n    }\n\n    this.style_ = styleLike;\n    this.styleFunction_ =\n      style === null ? undefined : toStyleFunction(this.style_);\n    this.changed();\n  }\n}\n\nexport default BaseVectorLayer;\n","/**\n * @module ol/render/webgl/constants\n */\n\n/**\n * @enum {string}\n */\nexport const WebGLWorkerMessageType = {\n  GENERATE_POLYGON_BUFFERS: 'GENERATE_POLYGON_BUFFERS',\n  GENERATE_POINT_BUFFERS: 'GENERATE_POINT_BUFFERS',\n  GENERATE_LINE_STRING_BUFFERS: 'GENERATE_LINE_STRING_BUFFERS',\n};\n\n/**\n * @typedef {Object} WebGLWorkerGenerateBuffersMessage\n * This message will trigger the generation of a vertex and an index buffer based on the given render instructions.\n * When the buffers are generated, the worked will send a message of the same type to the main thread, with\n * the generated buffers in it.\n * Note that any addition properties present in the message *will* be sent back to the main thread.\n * @property {number} id Message id; will be used both in request and response as a means of identification\n * @property {WebGLWorkerMessageType} type Message type\n * @property {ArrayBuffer} renderInstructions Polygon render instructions raw binary buffer.\n * @property {number} [customAttributesSize] Amount of custom attributes count in the polygon render instructions.\n * @property {ArrayBuffer} [vertexBuffer] Vertices array raw binary buffer (sent by the worker).\n * @property {ArrayBuffer} [indexBuffer] Indices array raw binary buffer (sent by the worker).\n * @property {import(\"../../transform\").Transform} [renderInstructionsTransform] Transformation matrix used to project the instructions coordinates\n */\n","'use strict';\n\nmodule.exports = earcut;\nmodule.exports.default = earcut;\n\nfunction earcut(data, holeIndices, dim) {\n\n    dim = dim || 2;\n\n    var hasHoles = holeIndices && holeIndices.length,\n        outerLen = hasHoles ? holeIndices[0] * dim : data.length,\n        outerNode = linkedList(data, 0, outerLen, dim, true),\n        triangles = [];\n\n    if (!outerNode || outerNode.next === outerNode.prev) return triangles;\n\n    var minX, minY, maxX, maxY, x, y, invSize;\n\n    if (hasHoles) outerNode = eliminateHoles(data, holeIndices, outerNode, dim);\n\n    // if the shape is not too simple, we'll use z-order curve hash later; calculate polygon bbox\n    if (data.length > 80 * dim) {\n        minX = maxX = data[0];\n        minY = maxY = data[1];\n\n        for (var i = dim; i < outerLen; i += dim) {\n            x = data[i];\n            y = data[i + 1];\n            if (x < minX) minX = x;\n            if (y < minY) minY = y;\n            if (x > maxX) maxX = x;\n            if (y > maxY) maxY = y;\n        }\n\n        // minX, minY and invSize are later used to transform coords into integers for z-order calculation\n        invSize = Math.max(maxX - minX, maxY - minY);\n        invSize = invSize !== 0 ? 32767 / invSize : 0;\n    }\n\n    earcutLinked(outerNode, triangles, dim, minX, minY, invSize, 0);\n\n    return triangles;\n}\n\n// create a circular doubly linked list from polygon points in the specified winding order\nfunction linkedList(data, start, end, dim, clockwise) {\n    var i, last;\n\n    if (clockwise === (signedArea(data, start, end, dim) > 0)) {\n        for (i = start; i < end; i += dim) last = insertNode(i, data[i], data[i + 1], last);\n    } else {\n        for (i = end - dim; i >= start; i -= dim) last = insertNode(i, data[i], data[i + 1], last);\n    }\n\n    if (last && equals(last, last.next)) {\n        removeNode(last);\n        last = last.next;\n    }\n\n    return last;\n}\n\n// eliminate colinear or duplicate points\nfunction filterPoints(start, end) {\n    if (!start) return start;\n    if (!end) end = start;\n\n    var p = start,\n        again;\n    do {\n        again = false;\n\n        if (!p.steiner && (equals(p, p.next) || area(p.prev, p, p.next) === 0)) {\n            removeNode(p);\n            p = end = p.prev;\n            if (p === p.next) break;\n            again = true;\n\n        } else {\n            p = p.next;\n        }\n    } while (again || p !== end);\n\n    return end;\n}\n\n// main ear slicing loop which triangulates a polygon (given as a linked list)\nfunction earcutLinked(ear, triangles, dim, minX, minY, invSize, pass) {\n    if (!ear) return;\n\n    // interlink polygon nodes in z-order\n    if (!pass && invSize) indexCurve(ear, minX, minY, invSize);\n\n    var stop = ear,\n        prev, next;\n\n    // iterate through ears, slicing them one by one\n    while (ear.prev !== ear.next) {\n        prev = ear.prev;\n        next = ear.next;\n\n        if (invSize ? isEarHashed(ear, minX, minY, invSize) : isEar(ear)) {\n            // cut off the triangle\n            triangles.push(prev.i / dim | 0);\n            triangles.push(ear.i / dim | 0);\n            triangles.push(next.i / dim | 0);\n\n            removeNode(ear);\n\n            // skipping the next vertex leads to less sliver triangles\n            ear = next.next;\n            stop = next.next;\n\n            continue;\n        }\n\n        ear = next;\n\n        // if we looped through the whole remaining polygon and can't find any more ears\n        if (ear === stop) {\n            // try filtering points and slicing again\n            if (!pass) {\n                earcutLinked(filterPoints(ear), triangles, dim, minX, minY, invSize, 1);\n\n            // if this didn't work, try curing all small self-intersections locally\n            } else if (pass === 1) {\n                ear = cureLocalIntersections(filterPoints(ear), triangles, dim);\n                earcutLinked(ear, triangles, dim, minX, minY, invSize, 2);\n\n            // as a last resort, try splitting the remaining polygon into two\n            } else if (pass === 2) {\n                splitEarcut(ear, triangles, dim, minX, minY, invSize);\n            }\n\n            break;\n        }\n    }\n}\n\n// check whether a polygon node forms a valid ear with adjacent nodes\nfunction isEar(ear) {\n    var a = ear.prev,\n        b = ear,\n        c = ear.next;\n\n    if (area(a, b, c) >= 0) return false; // reflex, can't be an ear\n\n    // now make sure we don't have other points inside the potential ear\n    var ax = a.x, bx = b.x, cx = c.x, ay = a.y, by = b.y, cy = c.y;\n\n    // triangle bbox; min & max are calculated like this for speed\n    var x0 = ax < bx ? (ax < cx ? ax : cx) : (bx < cx ? bx : cx),\n        y0 = ay < by ? (ay < cy ? ay : cy) : (by < cy ? by : cy),\n        x1 = ax > bx ? (ax > cx ? ax : cx) : (bx > cx ? bx : cx),\n        y1 = ay > by ? (ay > cy ? ay : cy) : (by > cy ? by : cy);\n\n    var p = c.next;\n    while (p !== a) {\n        if (p.x >= x0 && p.x <= x1 && p.y >= y0 && p.y <= y1 &&\n            pointInTriangle(ax, ay, bx, by, cx, cy, p.x, p.y) &&\n            area(p.prev, p, p.next) >= 0) return false;\n        p = p.next;\n    }\n\n    return true;\n}\n\nfunction isEarHashed(ear, minX, minY, invSize) {\n    var a = ear.prev,\n        b = ear,\n        c = ear.next;\n\n    if (area(a, b, c) >= 0) return false; // reflex, can't be an ear\n\n    var ax = a.x, bx = b.x, cx = c.x, ay = a.y, by = b.y, cy = c.y;\n\n    // triangle bbox; min & max are calculated like this for speed\n    var x0 = ax < bx ? (ax < cx ? ax : cx) : (bx < cx ? bx : cx),\n        y0 = ay < by ? (ay < cy ? ay : cy) : (by < cy ? by : cy),\n        x1 = ax > bx ? (ax > cx ? ax : cx) : (bx > cx ? bx : cx),\n        y1 = ay > by ? (ay > cy ? ay : cy) : (by > cy ? by : cy);\n\n    // z-order range for the current triangle bbox;\n    var minZ = zOrder(x0, y0, minX, minY, invSize),\n        maxZ = zOrder(x1, y1, minX, minY, invSize);\n\n    var p = ear.prevZ,\n        n = ear.nextZ;\n\n    // look for points inside the triangle in both directions\n    while (p && p.z >= minZ && n && n.z <= maxZ) {\n        if (p.x >= x0 && p.x <= x1 && p.y >= y0 && p.y <= y1 && p !== a && p !== c &&\n            pointInTriangle(ax, ay, bx, by, cx, cy, p.x, p.y) && area(p.prev, p, p.next) >= 0) return false;\n        p = p.prevZ;\n\n        if (n.x >= x0 && n.x <= x1 && n.y >= y0 && n.y <= y1 && n !== a && n !== c &&\n            pointInTriangle(ax, ay, bx, by, cx, cy, n.x, n.y) && area(n.prev, n, n.next) >= 0) return false;\n        n = n.nextZ;\n    }\n\n    // look for remaining points in decreasing z-order\n    while (p && p.z >= minZ) {\n        if (p.x >= x0 && p.x <= x1 && p.y >= y0 && p.y <= y1 && p !== a && p !== c &&\n            pointInTriangle(ax, ay, bx, by, cx, cy, p.x, p.y) && area(p.prev, p, p.next) >= 0) return false;\n        p = p.prevZ;\n    }\n\n    // look for remaining points in increasing z-order\n    while (n && n.z <= maxZ) {\n        if (n.x >= x0 && n.x <= x1 && n.y >= y0 && n.y <= y1 && n !== a && n !== c &&\n            pointInTriangle(ax, ay, bx, by, cx, cy, n.x, n.y) && area(n.prev, n, n.next) >= 0) return false;\n        n = n.nextZ;\n    }\n\n    return true;\n}\n\n// go through all polygon nodes and cure small local self-intersections\nfunction cureLocalIntersections(start, triangles, dim) {\n    var p = start;\n    do {\n        var a = p.prev,\n            b = p.next.next;\n\n        if (!equals(a, b) && intersects(a, p, p.next, b) && locallyInside(a, b) && locallyInside(b, a)) {\n\n            triangles.push(a.i / dim | 0);\n            triangles.push(p.i / dim | 0);\n            triangles.push(b.i / dim | 0);\n\n            // remove two nodes involved\n            removeNode(p);\n            removeNode(p.next);\n\n            p = start = b;\n        }\n        p = p.next;\n    } while (p !== start);\n\n    return filterPoints(p);\n}\n\n// try splitting polygon into two and triangulate them independently\nfunction splitEarcut(start, triangles, dim, minX, minY, invSize) {\n    // look for a valid diagonal that divides the polygon into two\n    var a = start;\n    do {\n        var b = a.next.next;\n        while (b !== a.prev) {\n            if (a.i !== b.i && isValidDiagonal(a, b)) {\n                // split the polygon in two by the diagonal\n                var c = splitPolygon(a, b);\n\n                // filter colinear points around the cuts\n                a = filterPoints(a, a.next);\n                c = filterPoints(c, c.next);\n\n                // run earcut on each half\n                earcutLinked(a, triangles, dim, minX, minY, invSize, 0);\n                earcutLinked(c, triangles, dim, minX, minY, invSize, 0);\n                return;\n            }\n            b = b.next;\n        }\n        a = a.next;\n    } while (a !== start);\n}\n\n// link every hole into the outer loop, producing a single-ring polygon without holes\nfunction eliminateHoles(data, holeIndices, outerNode, dim) {\n    var queue = [],\n        i, len, start, end, list;\n\n    for (i = 0, len = holeIndices.length; i < len; i++) {\n        start = holeIndices[i] * dim;\n        end = i < len - 1 ? holeIndices[i + 1] * dim : data.length;\n        list = linkedList(data, start, end, dim, false);\n        if (list === list.next) list.steiner = true;\n        queue.push(getLeftmost(list));\n    }\n\n    queue.sort(compareX);\n\n    // process holes from left to right\n    for (i = 0; i < queue.length; i++) {\n        outerNode = eliminateHole(queue[i], outerNode);\n    }\n\n    return outerNode;\n}\n\nfunction compareX(a, b) {\n    return a.x - b.x;\n}\n\n// find a bridge between vertices that connects hole with an outer ring and and link it\nfunction eliminateHole(hole, outerNode) {\n    var bridge = findHoleBridge(hole, outerNode);\n    if (!bridge) {\n        return outerNode;\n    }\n\n    var bridgeReverse = splitPolygon(bridge, hole);\n\n    // filter collinear points around the cuts\n    filterPoints(bridgeReverse, bridgeReverse.next);\n    return filterPoints(bridge, bridge.next);\n}\n\n// David Eberly's algorithm for finding a bridge between hole and outer polygon\nfunction findHoleBridge(hole, outerNode) {\n    var p = outerNode,\n        hx = hole.x,\n        hy = hole.y,\n        qx = -Infinity,\n        m;\n\n    // find a segment intersected by a ray from the hole's leftmost point to the left;\n    // segment's endpoint with lesser x will be potential connection point\n    do {\n        if (hy <= p.y && hy >= p.next.y && p.next.y !== p.y) {\n            var x = p.x + (hy - p.y) * (p.next.x - p.x) / (p.next.y - p.y);\n            if (x <= hx && x > qx) {\n                qx = x;\n                m = p.x < p.next.x ? p : p.next;\n                if (x === hx) return m; // hole touches outer segment; pick leftmost endpoint\n            }\n        }\n        p = p.next;\n    } while (p !== outerNode);\n\n    if (!m) return null;\n\n    // look for points inside the triangle of hole point, segment intersection and endpoint;\n    // if there are no points found, we have a valid connection;\n    // otherwise choose the point of the minimum angle with the ray as connection point\n\n    var stop = m,\n        mx = m.x,\n        my = m.y,\n        tanMin = Infinity,\n        tan;\n\n    p = m;\n\n    do {\n        if (hx >= p.x && p.x >= mx && hx !== p.x &&\n                pointInTriangle(hy < my ? hx : qx, hy, mx, my, hy < my ? qx : hx, hy, p.x, p.y)) {\n\n            tan = Math.abs(hy - p.y) / (hx - p.x); // tangential\n\n            if (locallyInside(p, hole) &&\n                (tan < tanMin || (tan === tanMin && (p.x > m.x || (p.x === m.x && sectorContainsSector(m, p)))))) {\n                m = p;\n                tanMin = tan;\n            }\n        }\n\n        p = p.next;\n    } while (p !== stop);\n\n    return m;\n}\n\n// whether sector in vertex m contains sector in vertex p in the same coordinates\nfunction sectorContainsSector(m, p) {\n    return area(m.prev, m, p.prev) < 0 && area(p.next, m, m.next) < 0;\n}\n\n// interlink polygon nodes in z-order\nfunction indexCurve(start, minX, minY, invSize) {\n    var p = start;\n    do {\n        if (p.z === 0) p.z = zOrder(p.x, p.y, minX, minY, invSize);\n        p.prevZ = p.prev;\n        p.nextZ = p.next;\n        p = p.next;\n    } while (p !== start);\n\n    p.prevZ.nextZ = null;\n    p.prevZ = null;\n\n    sortLinked(p);\n}\n\n// Simon Tatham's linked list merge sort algorithm\n// http://www.chiark.greenend.org.uk/~sgtatham/algorithms/listsort.html\nfunction sortLinked(list) {\n    var i, p, q, e, tail, numMerges, pSize, qSize,\n        inSize = 1;\n\n    do {\n        p = list;\n        list = null;\n        tail = null;\n        numMerges = 0;\n\n        while (p) {\n            numMerges++;\n            q = p;\n            pSize = 0;\n            for (i = 0; i < inSize; i++) {\n                pSize++;\n                q = q.nextZ;\n                if (!q) break;\n            }\n            qSize = inSize;\n\n            while (pSize > 0 || (qSize > 0 && q)) {\n\n                if (pSize !== 0 && (qSize === 0 || !q || p.z <= q.z)) {\n                    e = p;\n                    p = p.nextZ;\n                    pSize--;\n                } else {\n                    e = q;\n                    q = q.nextZ;\n                    qSize--;\n                }\n\n                if (tail) tail.nextZ = e;\n                else list = e;\n\n                e.prevZ = tail;\n                tail = e;\n            }\n\n            p = q;\n        }\n\n        tail.nextZ = null;\n        inSize *= 2;\n\n    } while (numMerges > 1);\n\n    return list;\n}\n\n// z-order of a point given coords and inverse of the longer side of data bbox\nfunction zOrder(x, y, minX, minY, invSize) {\n    // coords are transformed into non-negative 15-bit integer range\n    x = (x - minX) * invSize | 0;\n    y = (y - minY) * invSize | 0;\n\n    x = (x | (x << 8)) & 0x00FF00FF;\n    x = (x | (x << 4)) & 0x0F0F0F0F;\n    x = (x | (x << 2)) & 0x33333333;\n    x = (x | (x << 1)) & 0x55555555;\n\n    y = (y | (y << 8)) & 0x00FF00FF;\n    y = (y | (y << 4)) & 0x0F0F0F0F;\n    y = (y | (y << 2)) & 0x33333333;\n    y = (y | (y << 1)) & 0x55555555;\n\n    return x | (y << 1);\n}\n\n// find the leftmost node of a polygon ring\nfunction getLeftmost(start) {\n    var p = start,\n        leftmost = start;\n    do {\n        if (p.x < leftmost.x || (p.x === leftmost.x && p.y < leftmost.y)) leftmost = p;\n        p = p.next;\n    } while (p !== start);\n\n    return leftmost;\n}\n\n// check if a point lies within a convex triangle\nfunction pointInTriangle(ax, ay, bx, by, cx, cy, px, py) {\n    return (cx - px) * (ay - py) >= (ax - px) * (cy - py) &&\n           (ax - px) * (by - py) >= (bx - px) * (ay - py) &&\n           (bx - px) * (cy - py) >= (cx - px) * (by - py);\n}\n\n// check if a diagonal between two polygon nodes is valid (lies in polygon interior)\nfunction isValidDiagonal(a, b) {\n    return a.next.i !== b.i && a.prev.i !== b.i && !intersectsPolygon(a, b) && // dones't intersect other edges\n           (locallyInside(a, b) && locallyInside(b, a) && middleInside(a, b) && // locally visible\n            (area(a.prev, a, b.prev) || area(a, b.prev, b)) || // does not create opposite-facing sectors\n            equals(a, b) && area(a.prev, a, a.next) > 0 && area(b.prev, b, b.next) > 0); // special zero-length case\n}\n\n// signed area of a triangle\nfunction area(p, q, r) {\n    return (q.y - p.y) * (r.x - q.x) - (q.x - p.x) * (r.y - q.y);\n}\n\n// check if two points are equal\nfunction equals(p1, p2) {\n    return p1.x === p2.x && p1.y === p2.y;\n}\n\n// check if two segments intersect\nfunction intersects(p1, q1, p2, q2) {\n    var o1 = sign(area(p1, q1, p2));\n    var o2 = sign(area(p1, q1, q2));\n    var o3 = sign(area(p2, q2, p1));\n    var o4 = sign(area(p2, q2, q1));\n\n    if (o1 !== o2 && o3 !== o4) return true; // general case\n\n    if (o1 === 0 && onSegment(p1, p2, q1)) return true; // p1, q1 and p2 are collinear and p2 lies on p1q1\n    if (o2 === 0 && onSegment(p1, q2, q1)) return true; // p1, q1 and q2 are collinear and q2 lies on p1q1\n    if (o3 === 0 && onSegment(p2, p1, q2)) return true; // p2, q2 and p1 are collinear and p1 lies on p2q2\n    if (o4 === 0 && onSegment(p2, q1, q2)) return true; // p2, q2 and q1 are collinear and q1 lies on p2q2\n\n    return false;\n}\n\n// for collinear points p, q, r, check if point q lies on segment pr\nfunction onSegment(p, q, r) {\n    return q.x <= Math.max(p.x, r.x) && q.x >= Math.min(p.x, r.x) && q.y <= Math.max(p.y, r.y) && q.y >= Math.min(p.y, r.y);\n}\n\nfunction sign(num) {\n    return num > 0 ? 1 : num < 0 ? -1 : 0;\n}\n\n// check if a polygon diagonal intersects any polygon segments\nfunction intersectsPolygon(a, b) {\n    var p = a;\n    do {\n        if (p.i !== a.i && p.next.i !== a.i && p.i !== b.i && p.next.i !== b.i &&\n                intersects(p, p.next, a, b)) return true;\n        p = p.next;\n    } while (p !== a);\n\n    return false;\n}\n\n// check if a polygon diagonal is locally inside the polygon\nfunction locallyInside(a, b) {\n    return area(a.prev, a, a.next) < 0 ?\n        area(a, b, a.next) >= 0 && area(a, a.prev, b) >= 0 :\n        area(a, b, a.prev) < 0 || area(a, a.next, b) < 0;\n}\n\n// check if the middle point of a polygon diagonal is inside the polygon\nfunction middleInside(a, b) {\n    var p = a,\n        inside = false,\n        px = (a.x + b.x) / 2,\n        py = (a.y + b.y) / 2;\n    do {\n        if (((p.y > py) !== (p.next.y > py)) && p.next.y !== p.y &&\n                (px < (p.next.x - p.x) * (py - p.y) / (p.next.y - p.y) + p.x))\n            inside = !inside;\n        p = p.next;\n    } while (p !== a);\n\n    return inside;\n}\n\n// link two polygon vertices with a bridge; if the vertices belong to the same ring, it splits polygon into two;\n// if one belongs to the outer ring and another to a hole, it merges it into a single ring\nfunction splitPolygon(a, b) {\n    var a2 = new Node(a.i, a.x, a.y),\n        b2 = new Node(b.i, b.x, b.y),\n        an = a.next,\n        bp = b.prev;\n\n    a.next = b;\n    b.prev = a;\n\n    a2.next = an;\n    an.prev = a2;\n\n    b2.next = a2;\n    a2.prev = b2;\n\n    bp.next = b2;\n    b2.prev = bp;\n\n    return b2;\n}\n\n// create a node and optionally link it with previous one (in a circular doubly linked list)\nfunction insertNode(i, x, y, last) {\n    var p = new Node(i, x, y);\n\n    if (!last) {\n        p.prev = p;\n        p.next = p;\n\n    } else {\n        p.next = last.next;\n        p.prev = last;\n        last.next.prev = p;\n        last.next = p;\n    }\n    return p;\n}\n\nfunction removeNode(p) {\n    p.next.prev = p.prev;\n    p.prev.next = p.next;\n\n    if (p.prevZ) p.prevZ.nextZ = p.nextZ;\n    if (p.nextZ) p.nextZ.prevZ = p.prevZ;\n}\n\nfunction Node(i, x, y) {\n    // vertex index in coordinates array\n    this.i = i;\n\n    // vertex coordinates\n    this.x = x;\n    this.y = y;\n\n    // previous and next vertex nodes in a polygon ring\n    this.prev = null;\n    this.next = null;\n\n    // z-order curve value\n    this.z = 0;\n\n    // previous and next nodes in z-order\n    this.prevZ = null;\n    this.nextZ = null;\n\n    // indicates whether this is a steiner point\n    this.steiner = false;\n}\n\n// return a percentage difference between the polygon area and its triangulation area;\n// used to verify correctness of triangulation\nearcut.deviation = function (data, holeIndices, dim, triangles) {\n    var hasHoles = holeIndices && holeIndices.length;\n    var outerLen = hasHoles ? holeIndices[0] * dim : data.length;\n\n    var polygonArea = Math.abs(signedArea(data, 0, outerLen, dim));\n    if (hasHoles) {\n        for (var i = 0, len = holeIndices.length; i < len; i++) {\n            var start = holeIndices[i] * dim;\n            var end = i < len - 1 ? holeIndices[i + 1] * dim : data.length;\n            polygonArea -= Math.abs(signedArea(data, start, end, dim));\n        }\n    }\n\n    var trianglesArea = 0;\n    for (i = 0; i < triangles.length; i += 3) {\n        var a = triangles[i] * dim;\n        var b = triangles[i + 1] * dim;\n        var c = triangles[i + 2] * dim;\n        trianglesArea += Math.abs(\n            (data[a] - data[c]) * (data[b + 1] - data[a + 1]) -\n            (data[a] - data[b]) * (data[c + 1] - data[a + 1]));\n    }\n\n    return polygonArea === 0 && trianglesArea === 0 ? 0 :\n        Math.abs((trianglesArea - polygonArea) / polygonArea);\n};\n\nfunction signedArea(data, start, end, dim) {\n    var sum = 0;\n    for (var i = start, j = end - dim; i < end; i += dim) {\n        sum += (data[j] - data[i]) * (data[i + 1] + data[j + 1]);\n        j = i;\n    }\n    return sum;\n}\n\n// turn a polygon in a multi-dimensional array form (e.g. as in GeoJSON) into a form Earcut accepts\nearcut.flatten = function (data) {\n    var dim = data[0][0].length,\n        result = {vertices: [], holes: [], dimensions: dim},\n        holeIndex = 0;\n\n    for (var i = 0; i < data.length; i++) {\n        for (var j = 0; j < data[i].length; j++) {\n            for (var d = 0; d < dim; d++) result.vertices.push(data[i][j][d]);\n        }\n        if (i > 0) {\n            holeIndex += data[i - 1].length;\n            result.holes.push(holeIndex);\n        }\n    }\n    return result;\n};\n","/**\n * @module ol/render/webgl/utils\n */\nimport earcut from 'earcut';\nimport {apply as applyTransform} from '../../transform.js';\nimport {clamp} from '../../math.js';\n\nconst tmpArray_ = [];\n\n/**\n * An object holding positions both in an index and a vertex buffer.\n * @typedef {Object} BufferPositions\n * @property {number} vertexPosition Position in the vertex buffer\n * @property {number} indexPosition Position in the index buffer\n */\nconst bufferPositions_ = {vertexPosition: 0, indexPosition: 0};\n\nfunction writePointVertex(buffer, pos, x, y, index) {\n  buffer[pos + 0] = x;\n  buffer[pos + 1] = y;\n  buffer[pos + 2] = index;\n}\n\n/**\n * Pushes a quad (two triangles) based on a point geometry\n * @param {Float32Array} instructions Array of render instructions for points.\n * @param {number} elementIndex Index from which render instructions will be read.\n * @param {Float32Array} vertexBuffer Buffer in the form of a typed array.\n * @param {Uint32Array} indexBuffer Buffer in the form of a typed array.\n * @param {number} customAttributesSize Amount of custom attributes for each element.\n * @param {BufferPositions} [bufferPositions] Buffer write positions; if not specified, positions will be set at 0.\n * @return {BufferPositions} New buffer positions where to write next\n * @property {number} vertexPosition New position in the vertex buffer where future writes should start.\n * @property {number} indexPosition New position in the index buffer where future writes should start.\n * @private\n */\nexport function writePointFeatureToBuffers(\n  instructions,\n  elementIndex,\n  vertexBuffer,\n  indexBuffer,\n  customAttributesSize,\n  bufferPositions\n) {\n  // This is for x, y and index\n  const baseVertexAttrsCount = 3;\n  const baseInstructionsCount = 2;\n  const stride = baseVertexAttrsCount + customAttributesSize;\n\n  const x = instructions[elementIndex + 0];\n  const y = instructions[elementIndex + 1];\n\n  // read custom numerical attributes on the feature\n  const customAttrs = tmpArray_;\n  customAttrs.length = customAttributesSize;\n  for (let i = 0; i < customAttrs.length; i++) {\n    customAttrs[i] = instructions[elementIndex + baseInstructionsCount + i];\n  }\n\n  let vPos = bufferPositions ? bufferPositions.vertexPosition : 0;\n  let iPos = bufferPositions ? bufferPositions.indexPosition : 0;\n  const baseIndex = vPos / stride;\n\n  // push vertices for each of the four quad corners (first standard then custom attributes)\n  writePointVertex(vertexBuffer, vPos, x, y, 0);\n  customAttrs.length &&\n    vertexBuffer.set(customAttrs, vPos + baseVertexAttrsCount);\n  vPos += stride;\n\n  writePointVertex(vertexBuffer, vPos, x, y, 1);\n  customAttrs.length &&\n    vertexBuffer.set(customAttrs, vPos + baseVertexAttrsCount);\n  vPos += stride;\n\n  writePointVertex(vertexBuffer, vPos, x, y, 2);\n  customAttrs.length &&\n    vertexBuffer.set(customAttrs, vPos + baseVertexAttrsCount);\n  vPos += stride;\n\n  writePointVertex(vertexBuffer, vPos, x, y, 3);\n  customAttrs.length &&\n    vertexBuffer.set(customAttrs, vPos + baseVertexAttrsCount);\n  vPos += stride;\n\n  indexBuffer[iPos++] = baseIndex;\n  indexBuffer[iPos++] = baseIndex + 1;\n  indexBuffer[iPos++] = baseIndex + 3;\n  indexBuffer[iPos++] = baseIndex + 1;\n  indexBuffer[iPos++] = baseIndex + 2;\n  indexBuffer[iPos++] = baseIndex + 3;\n\n  bufferPositions_.vertexPosition = vPos;\n  bufferPositions_.indexPosition = iPos;\n\n  return bufferPositions_;\n}\n\n/**\n * Pushes a single quad to form a line segment; also includes a computation for the join angles with previous and next\n * segment, in order to be able to offset the vertices correctly in the shader\n * @param {Float32Array} instructions Array of render instructions for lines.\n * @param {number} segmentStartIndex Index of the segment start point from which render instructions will be read.\n * @param {number} segmentEndIndex Index of the segment start point from which render instructions will be read.\n * @param {number|null} beforeSegmentIndex Index of the point right before the segment (null if none, e.g this is a line start)\n * @param {number|null} afterSegmentIndex Index of the point right after the segment (null if none, e.g this is a line end)\n * @param {Array<number>} vertexArray Array containing vertices.\n * @param {Array<number>} indexArray Array containing indices.\n * @param {Array<number>} customAttributes Array of custom attributes value\n * @param {import('../../transform.js').Transform} instructionsTransform Transform matrix used to project coordinates in instructions\n * @param {import('../../transform.js').Transform} invertInstructionsTransform Transform matrix used to project coordinates in instructions\n * @private\n */\nexport function writeLineSegmentToBuffers(\n  instructions,\n  segmentStartIndex,\n  segmentEndIndex,\n  beforeSegmentIndex,\n  afterSegmentIndex,\n  vertexArray,\n  indexArray,\n  customAttributes,\n  instructionsTransform,\n  invertInstructionsTransform\n) {\n  // compute the stride to determine how many vertices were already pushed\n  const baseVertexAttrsCount = 5; // base attributes: x0, y0, x1, y1, params (vertex number [0-3], join angle 1, join angle 2)\n  const stride = baseVertexAttrsCount + customAttributes.length;\n  const baseIndex = vertexArray.length / stride;\n\n  // The segment is composed of two positions called P0[x0, y0] and P1[x1, y1]\n  // Depending on whether there are points before and after the segment, its final shape\n  // will be different\n  const p0 = [\n    instructions[segmentStartIndex + 0],\n    instructions[segmentStartIndex + 1],\n  ];\n  const p1 = [instructions[segmentEndIndex], instructions[segmentEndIndex + 1]];\n\n  // to compute offsets from the line center we need to reproject\n  // coordinates back in world units and compute the length of the segment\n  const p0world = applyTransform(invertInstructionsTransform, [...p0]);\n  const p1world = applyTransform(invertInstructionsTransform, [...p1]);\n\n  function computeVertexParameters(vertexNumber, joinAngle1, joinAngle2) {\n    const shift = 10000;\n    const anglePrecision = 1500;\n    return (\n      Math.round(joinAngle1 * anglePrecision) +\n      Math.round(joinAngle2 * anglePrecision) * shift +\n      vertexNumber * shift * shift\n    );\n  }\n\n  // compute the angle between p0pA and p0pB\n  // returns a value in [0, 2PI]\n  function angleBetween(p0, pA, pB) {\n    const lenA = Math.sqrt(\n      (pA[0] - p0[0]) * (pA[0] - p0[0]) + (pA[1] - p0[1]) * (pA[1] - p0[1])\n    );\n    const tangentA = [(pA[0] - p0[0]) / lenA, (pA[1] - p0[1]) / lenA];\n    const orthoA = [-tangentA[1], tangentA[0]];\n    const lenB = Math.sqrt(\n      (pB[0] - p0[0]) * (pB[0] - p0[0]) + (pB[1] - p0[1]) * (pB[1] - p0[1])\n    );\n    const tangentB = [(pB[0] - p0[0]) / lenB, (pB[1] - p0[1]) / lenB];\n\n    // this angle can be clockwise or anticlockwise; hence the computation afterwards\n    const angle =\n      lenA === 0 || lenB === 0\n        ? 0\n        : Math.acos(\n            clamp(tangentB[0] * tangentA[0] + tangentB[1] * tangentA[1], -1, 1)\n          );\n    const isClockwise = tangentB[0] * orthoA[0] + tangentB[1] * orthoA[1] > 0;\n    return !isClockwise ? Math.PI * 2 - angle : angle;\n  }\n\n  const joinBefore = beforeSegmentIndex !== null;\n  const joinAfter = afterSegmentIndex !== null;\n\n  let angle0 = 0;\n  let angle1 = 0;\n\n  // add vertices and adapt offsets for P0 in case of join\n  if (joinBefore) {\n    // B for before\n    const pB = [\n      instructions[beforeSegmentIndex],\n      instructions[beforeSegmentIndex + 1],\n    ];\n    const pBworld = applyTransform(invertInstructionsTransform, [...pB]);\n    angle0 = angleBetween(p0world, p1world, pBworld);\n  }\n  // adapt offsets for P1 in case of join\n  if (joinAfter) {\n    // A for after\n    const pA = [\n      instructions[afterSegmentIndex],\n      instructions[afterSegmentIndex + 1],\n    ];\n    const pAworld = applyTransform(invertInstructionsTransform, [...pA]);\n    angle1 = angleBetween(p1world, p0world, pAworld);\n  }\n\n  // add main segment triangles\n  vertexArray.push(\n    p0[0],\n    p0[1],\n    p1[0],\n    p1[1],\n    computeVertexParameters(0, angle0, angle1)\n  );\n  vertexArray.push(...customAttributes);\n\n  vertexArray.push(\n    p0[0],\n    p0[1],\n    p1[0],\n    p1[1],\n    computeVertexParameters(1, angle0, angle1)\n  );\n  vertexArray.push(...customAttributes);\n\n  vertexArray.push(\n    p0[0],\n    p0[1],\n    p1[0],\n    p1[1],\n    computeVertexParameters(2, angle0, angle1)\n  );\n  vertexArray.push(...customAttributes);\n\n  vertexArray.push(\n    p0[0],\n    p0[1],\n    p1[0],\n    p1[1],\n    computeVertexParameters(3, angle0, angle1)\n  );\n  vertexArray.push(...customAttributes);\n\n  indexArray.push(\n    baseIndex,\n    baseIndex + 1,\n    baseIndex + 2,\n    baseIndex + 1,\n    baseIndex + 3,\n    baseIndex + 2\n  );\n}\n\n/**\n * Pushes several triangles to form a polygon, including holes\n * @param {Float32Array} instructions Array of render instructions for lines.\n * @param {number} polygonStartIndex Index of the polygon start point from which render instructions will be read.\n * @param {Array<number>} vertexArray Array containing vertices.\n * @param {Array<number>} indexArray Array containing indices.\n * @param {number} customAttributesSize Amount of custom attributes for each element.\n * @return {number} Next polygon instructions index\n * @private\n */\nexport function writePolygonTrianglesToBuffers(\n  instructions,\n  polygonStartIndex,\n  vertexArray,\n  indexArray,\n  customAttributesSize\n) {\n  const instructionsPerVertex = 2; // x, y\n  const attributesPerVertex = 2 + customAttributesSize;\n  let instructionsIndex = polygonStartIndex;\n  const customAttributes = instructions.slice(\n    instructionsIndex,\n    instructionsIndex + customAttributesSize\n  );\n  instructionsIndex += customAttributesSize;\n  const ringsCount = instructions[instructionsIndex++];\n  let verticesCount = 0;\n  const holes = new Array(ringsCount - 1);\n  for (let i = 0; i < ringsCount; i++) {\n    verticesCount += instructions[instructionsIndex++];\n    if (i < ringsCount - 1) {\n      holes[i] = verticesCount;\n    }\n  }\n  const flatCoords = instructions.slice(\n    instructionsIndex,\n    instructionsIndex + verticesCount * instructionsPerVertex\n  );\n\n  // pushing to vertices and indices!! this is where the magic happens\n  const result = earcut(flatCoords, holes, instructionsPerVertex);\n  for (let i = 0; i < result.length; i++) {\n    indexArray.push(result[i] + vertexArray.length / attributesPerVertex);\n  }\n  for (let i = 0; i < flatCoords.length; i += 2) {\n    vertexArray.push(flatCoords[i], flatCoords[i + 1], ...customAttributes);\n  }\n\n  return instructionsIndex + verticesCount * instructionsPerVertex;\n}\n\n/**\n * Returns a texture of 1x1 pixel, white\n * @private\n * @return {ImageData} Image data.\n */\nexport function getBlankImageData() {\n  const canvas = document.createElement('canvas');\n  const image = canvas.getContext('2d').createImageData(1, 1);\n  image.data[0] = 255;\n  image.data[1] = 255;\n  image.data[2] = 255;\n  image.data[3] = 255;\n  return image;\n}\n\n/**\n * Generates a color array based on a numerical id\n * Note: the range for each component is 0 to 1 with 256 steps\n * @param {number} id Id\n * @param {Array<number>} [array] Reusable array\n * @return {Array<number>} Color array containing the encoded id\n */\nexport function colorEncodeId(id, array) {\n  array = array || [];\n  const radix = 256;\n  const divide = radix - 1;\n  array[0] = Math.floor(id / radix / radix / radix) / divide;\n  array[1] = (Math.floor(id / radix / radix) % radix) / divide;\n  array[2] = (Math.floor(id / radix) % radix) / divide;\n  array[3] = (id % radix) / divide;\n  return array;\n}\n\n/**\n * Reads an id from a color-encoded array\n * Note: the expected range for each component is 0 to 1 with 256 steps.\n * @param {Array<number>} color Color array containing the encoded id\n * @return {number} Decoded id\n */\nexport function colorDecodeId(color) {\n  let id = 0;\n  const radix = 256;\n  const mult = radix - 1;\n  id += Math.round(color[0] * radix * radix * radix * mult);\n  id += Math.round(color[1] * radix * radix * mult);\n  id += Math.round(color[2] * radix * mult);\n  id += Math.round(color[3] * mult);\n  return id;\n}\n","\n        export function create() {\n          const source = \"const e=\\\"GENERATE_POLYGON_BUFFERS\\\",t=\\\"GENERATE_POINT_BUFFERS\\\",n=\\\"GENERATE_LINE_STRING_BUFFERS\\\",r={1:\\\"The view center is not defined\\\",2:\\\"The view resolution is not defined\\\",3:\\\"The view rotation is not defined\\\",4:\\\"`image` and `src` cannot be provided at the same time\\\",5:\\\"`imgSize` must be set when `image` is provided\\\",7:\\\"`format` must be set when `url` is set\\\",8:\\\"Unknown `serverType` configured\\\",9:\\\"`url` must be configured or set using `#setUrl()`\\\",10:\\\"The default `geometryFunction` can only handle `Point` geometries\\\",11:\\\"`options.featureTypes` must be an Array\\\",12:\\\"`options.geometryName` must also be provided when `options.bbox` is set\\\",13:\\\"Invalid corner\\\",14:\\\"Invalid color\\\",15:\\\"Tried to get a value for a key that does not exist in the cache\\\",16:\\\"Tried to set a value for a key that is used already\\\",17:\\\"`resolutions` must be sorted in descending order\\\",18:\\\"Either `origin` or `origins` must be configured, never both\\\",19:\\\"Number of `tileSizes` and `resolutions` must be equal\\\",20:\\\"Number of `origins` and `resolutions` must be equal\\\",22:\\\"Either `tileSize` or `tileSizes` must be configured, never both\\\",24:\\\"Invalid extent or geometry provided as `geometry`\\\",25:\\\"Cannot fit empty extent provided as `geometry`\\\",26:\\\"Features must have an id set\\\",27:\\\"Features must have an id set\\\",28:'`renderMode` must be `\\\"hybrid\\\"` or `\\\"vector\\\"`',30:\\\"The passed `feature` was already added to the source\\\",31:\\\"Tried to enqueue an `element` that was already added to the queue\\\",32:\\\"Transformation matrix cannot be inverted\\\",33:\\\"Invalid units\\\",34:\\\"Invalid geometry layout\\\",36:\\\"Unknown SRS type\\\",37:\\\"Unknown geometry type found\\\",38:\\\"`styleMapValue` has an unknown type\\\",39:\\\"Unknown geometry type\\\",40:\\\"Expected `feature` to have a geometry\\\",41:\\\"Expected an `ol/style/Style` or an array of `ol/style/Style.js`\\\",42:\\\"Question unknown, the answer is 42\\\",43:\\\"Expected `layers` to be an array or a `Collection`\\\",47:\\\"Expected `controls` to be an array or an `ol/Collection`\\\",48:\\\"Expected `interactions` to be an array or an `ol/Collection`\\\",49:\\\"Expected `overlays` to be an array or an `ol/Collection`\\\",50:\\\"`options.featureTypes` should be an Array\\\",51:\\\"Either `url` or `tileJSON` options must be provided\\\",52:\\\"Unknown `serverType` configured\\\",53:\\\"Unknown `tierSizeCalculation` configured\\\",55:\\\"The {-y} placeholder requires a tile grid with extent\\\",56:\\\"mapBrowserEvent must originate from a pointer event\\\",57:\\\"At least 2 conditions are required\\\",59:\\\"Invalid command found in the PBF\\\",60:\\\"Missing or invalid `size`\\\",61:\\\"Cannot determine IIIF Image API version from provided image information JSON\\\",62:\\\"A `WebGLArrayBuffer` must either be of type `ELEMENT_ARRAY_BUFFER` or `ARRAY_BUFFER`\\\",64:\\\"Layer opacity must be a number\\\",66:\\\"`forEachFeatureAtCoordinate` cannot be used on a WebGL layer if the hit detection logic has not been enabled. This is done by providing adequate shaders using the `hitVertexShader` and `hitFragmentShader` properties of `WebGLPointsLayerRenderer`\\\",67:\\\"A layer can only be added to the map once. Use either `layer.setMap()` or `map.addLayer()`, not both\\\",68:\\\"A VectorTile source can only be rendered if it has a projection compatible with the view projection\\\",69:\\\"`width` or `height` cannot be provided together with `scale`\\\"};class o extends Error{constructor(e){const t=r[e];super(t),this.code=e,this.name=\\\"AssertionError\\\",this.message=t}}var i=o;function a(e,t){const n=t[0],r=t[1];return t[0]=e[0]*n+e[2]*r+e[4],t[1]=e[1]*n+e[3]*r+e[5],t}function s(e,t){const n=(r=t)[0]*r[3]-r[1]*r[2];var r;!function(e,t){if(!e)throw new i(t)}(0!==n,32);const o=t[0],a=t[1],s=t[2],u=t[3],f=t[4],x=t[5];return e[0]=u/n,e[1]=-a/n,e[2]=-s/n,e[3]=o/n,e[4]=(s*x-u*f)/n,e[5]=-(o*x-a*f)/n,e}function u(e){return e&&e.__esModule&&Object.prototype.hasOwnProperty.call(e,\\\"default\\\")?e.default:e}new Array(6);var f={exports:{}};function x(e,t,n){n=n||2;var r,o,i,a,s,u,f,x=t&&t.length,h=x?t[0]*n:e.length,v=l(e,0,h,n,!0),d=[];if(!v||v.next===v.prev)return d;if(x&&(v=function(e,t,n,r){var 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Used to optimize\n * rebuildBuffers by accessing these objects quicker.\n * @property {import(\"../../Feature\").default} feature Feature\n * @property {Object<string, *>} properties Feature properties\n * @property {import(\"../../geom\").Geometry} geometry Feature geometry\n */\n\n/**\n * @typedef {Object} Options\n * @property {string} [className='ol-layer'] A CSS class name to set to the canvas element.\n * @property {Array<CustomAttribute>} [attributes] These attributes will be read from the features in the source and then\n * passed to the GPU. The `name` property of each attribute will serve as its identifier:\n *  * In the vertex shader as an `attribute` by prefixing it with `a_`\n *  * In the fragment shader as a `varying` by prefixing it with `v_`\n * Please note that these can only be numerical values.\n * @property {string} vertexShader Vertex shader source, mandatory.\n * @property {string} fragmentShader Fragment shader source, mandatory.\n * @property {boolean} [hitDetectionEnabled] Whether shader is hit detection aware.\n * @property {Object<string,import(\"../../webgl/Helper\").UniformValue>} [uniforms] Uniform definitions for the post process steps\n * Please note that `u_texture` is reserved for the main texture slot and `u_opacity` is reserved for the layer opacity.\n * @property {Array<import(\"./Layer\").PostProcessesOptions>} [postProcesses] Post-processes definitions\n */\n\n/**\n * @classdesc\n * WebGL vector renderer optimized for points.\n * All features will be rendered as quads (two triangles forming a square). New data will be flushed to the GPU\n * every time the vector source changes.\n *\n * You need to provide vertex and fragment shaders for rendering. This can be done using\n * {@link module:ol/webgl/ShaderBuilder~ShaderBuilder} utilities. These shaders shall expect a `a_position` attribute\n * containing the screen-space projected center of the quad, as well as a `a_index` attribute\n * whose value (0, 1, 2 or 3) indicates which quad vertex is currently getting processed (see structure below).\n *\n * To include variable attributes in the shaders, you need to declare them using the `attributes` property of\n * the options object like so:\n * ```js\n * new WebGLPointsLayerRenderer(layer, {\n *   attributes: [\n *     {\n *       name: 'size',\n *       callback: function(feature) {\n *         // compute something with the feature\n *       }\n *     },\n *     {\n *       name: 'weight',\n *       callback: function(feature) {\n *         // compute something with the feature\n *       }\n *     },\n *   ],\n *   vertexShader:\n *     // shader using attribute a_weight and a_size\n *   fragmentShader:\n *     // shader using varying v_weight and v_size\n * ```\n *\n * To enable hit detection, you must as well provide dedicated shaders using the `hitVertexShader`\n * and `hitFragmentShader` properties. These shall expect the `a_hitColor` attribute to contain\n * the final color that will have to be output for hit detection to work.\n *\n * The following uniform is used for the main texture: `u_texture`.\n * The following uniform is used for the layer opacity: `u_opacity`.\n *\n * Please note that the main shader output should have premultiplied alpha, otherwise visual anomalies may occur.\n *\n * Points are rendered as quads with the following structure:\n *\n * ```\n *   (u0, v1)      (u1, v1)\n *  [3]----------[2]\n *   |`           |\n *   |  `         |\n *   |    `       |\n *   |      `     |\n *   |        `   |\n *   |          ` |\n *  [0]----------[1]\n *   (u0, v0)      (u1, v0)\n *  ```\n *\n * This uses {@link module:ol/webgl/Helper~WebGLHelper} internally.\n *\n * @api\n */\nclass WebGLPointsLayerRenderer extends WebGLLayerRenderer {\n  /**\n   * @param {import(\"../../layer/Layer.js\").default} layer Layer.\n   * @param {Options} options Options.\n   */\n  constructor(layer, options) {\n    const uniforms = options.uniforms || {};\n    const projectionMatrixTransform = createTransform();\n    uniforms[DefaultUniform.PROJECTION_MATRIX] = projectionMatrixTransform;\n\n    super(layer, {\n      uniforms: uniforms,\n      postProcesses: options.postProcesses,\n    });\n\n    this.sourceRevision_ = -1;\n\n    this.verticesBuffer_ = new WebGLArrayBuffer(ARRAY_BUFFER, DYNAMIC_DRAW);\n    this.indicesBuffer_ = new WebGLArrayBuffer(\n      ELEMENT_ARRAY_BUFFER,\n      DYNAMIC_DRAW\n    );\n\n    /**\n     * @private\n     */\n    this.vertexShader_ = options.vertexShader;\n\n    /**\n     * @private\n     */\n    this.fragmentShader_ = options.fragmentShader;\n\n    /**\n     * @type {WebGLProgram}\n     * @private\n     */\n    this.program_;\n\n    /**\n     * @type {boolean}\n     * @private\n     */\n    this.hitDetectionEnabled_ = options.hitDetectionEnabled ?? true;\n\n    const customAttributes = options.attributes\n      ? options.attributes.map(function (attribute) {\n          return {\n            name: 'a_' + attribute.name,\n            size: 1,\n            type: AttributeType.FLOAT,\n          };\n        })\n      : [];\n\n    /**\n     * A list of attributes used by the renderer. By default only the position and\n     * index of the vertex (0 to 3) are required.\n     * @type {Array<import('../../webgl/Helper.js').AttributeDescription>}\n     */\n    this.attributes = [\n      {\n        name: 'a_position',\n        size: 2,\n        type: AttributeType.FLOAT,\n      },\n      {\n        name: 'a_index',\n        size: 1,\n        type: AttributeType.FLOAT,\n      },\n    ];\n\n    if (this.hitDetectionEnabled_) {\n      this.attributes.push({\n        name: 'a_hitColor',\n        size: 4,\n        type: AttributeType.FLOAT,\n      });\n      this.attributes.push({\n        name: 'a_featureUid',\n        size: 1,\n        type: AttributeType.FLOAT,\n      });\n    }\n    this.attributes.push(...customAttributes);\n\n    this.customAttributes = options.attributes ? options.attributes : [];\n\n    this.previousExtent_ = createEmpty();\n\n    /**\n     * This transform is updated on every frame and is the composition of:\n     * - invert of the world->screen transform that was used when rebuilding buffers (see `this.renderTransform_`)\n     * - current world->screen transform\n     * @type {import(\"../../transform.js\").Transform}\n     * @private\n     */\n    this.currentTransform_ = projectionMatrixTransform;\n\n    /**\n     * This transform is updated when buffers are rebuilt and converts world space coordinates to screen space\n     * @type {import(\"../../transform.js\").Transform}\n     * @private\n     */\n    this.renderTransform_ = createTransform();\n\n    /**\n     * @type {import(\"../../transform.js\").Transform}\n     * @private\n     */\n    this.invertRenderTransform_ = createTransform();\n\n    /**\n     * @type {Float32Array}\n     * @private\n     */\n    this.renderInstructions_ = new Float32Array(0);\n\n    /**\n     * @type {WebGLRenderTarget}\n     * @private\n     */\n    this.hitRenderTarget_;\n\n    /**\n     * Keep track of latest message sent to worker\n     * @type {number}\n     * @private\n     */\n    this.lastSentId = 0;\n\n    /**\n     * @private\n     */\n    this.worker_ = createWebGLWorker();\n\n    this.worker_.addEventListener(\n      'message',\n      /**\n       * @param {*} event Event.\n       */\n      (event) => {\n        const received = event.data;\n        if (received.type === WebGLWorkerMessageType.GENERATE_POINT_BUFFERS) {\n          const projectionTransform = received.projectionTransform;\n          this.verticesBuffer_.fromArrayBuffer(received.vertexBuffer);\n          this.helper.flushBufferData(this.verticesBuffer_);\n          this.indicesBuffer_.fromArrayBuffer(received.indexBuffer);\n          this.helper.flushBufferData(this.indicesBuffer_);\n\n          this.renderTransform_ = projectionTransform;\n          makeInverseTransform(\n            this.invertRenderTransform_,\n            this.renderTransform_\n          );\n          this.renderInstructions_ = new Float32Array(\n            event.data.renderInstructions\n          );\n          if (received.id === this.lastSentId) {\n            this.ready = true;\n          }\n          this.getLayer().changed();\n        }\n      }\n    );\n\n    /**\n     * This object will be updated when the source changes. Key is uid.\n     * @type {Object<string, FeatureCacheItem>}\n     * @private\n     */\n    this.featureCache_ = {};\n\n    /**\n     * Amount of features in the cache.\n     * @type {number}\n     * @private\n     */\n    this.featureCount_ = 0;\n\n    const source = this.getLayer().getSource();\n    this.sourceListenKeys_ = [\n      listen(\n        source,\n        VectorEventType.ADDFEATURE,\n        this.handleSourceFeatureAdded_,\n        this\n      ),\n      listen(\n        source,\n        VectorEventType.CHANGEFEATURE,\n        this.handleSourceFeatureChanged_,\n        this\n      ),\n      listen(\n        source,\n        VectorEventType.REMOVEFEATURE,\n        this.handleSourceFeatureDelete_,\n        this\n      ),\n      listen(\n        source,\n        VectorEventType.CLEAR,\n        this.handleSourceFeatureClear_,\n        this\n      ),\n    ];\n    source.forEachFeature((feature) => {\n      this.featureCache_[getUid(feature)] = {\n        feature: feature,\n        properties: feature.getProperties(),\n        geometry: feature.getGeometry(),\n      };\n      this.featureCount_++;\n    });\n  }\n\n  afterHelperCreated() {\n    this.program_ = this.helper.getProgram(\n      this.fragmentShader_,\n      this.vertexShader_\n    );\n\n    if (this.hitDetectionEnabled_) {\n      this.hitRenderTarget_ = new WebGLRenderTarget(this.helper);\n    }\n  }\n\n  /**\n   * @param {import(\"../../source/Vector.js\").VectorSourceEvent} event Event.\n   * @private\n   */\n  handleSourceFeatureAdded_(event) {\n    const feature = event.feature;\n    this.featureCache_[getUid(feature)] = {\n      feature: feature,\n      properties: feature.getProperties(),\n      geometry: feature.getGeometry(),\n    };\n    this.featureCount_++;\n  }\n\n  /**\n   * @param {import(\"../../source/Vector.js\").VectorSourceEvent} event Event.\n   * @private\n   */\n  handleSourceFeatureChanged_(event) {\n    const feature = event.feature;\n    this.featureCache_[getUid(feature)] = {\n      feature: feature,\n      properties: feature.getProperties(),\n      geometry: feature.getGeometry(),\n    };\n  }\n\n  /**\n   * @param {import(\"../../source/Vector.js\").VectorSourceEvent} event Event.\n   * @private\n   */\n  handleSourceFeatureDelete_(event) {\n    const feature = event.feature;\n    delete this.featureCache_[getUid(feature)];\n    this.featureCount_--;\n  }\n\n  /**\n   * @private\n   */\n  handleSourceFeatureClear_() {\n    this.featureCache_ = {};\n    this.featureCount_ = 0;\n  }\n\n  /**\n   * Render the layer.\n   * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n   * @return {HTMLElement} The rendered element.\n   */\n  renderFrame(frameState) {\n    const gl = this.helper.getGL();\n    this.preRender(gl, frameState);\n\n    const [startWorld, endWorld, worldWidth] =\n      this.getWorldParameters_(frameState);\n\n    // draw the normal canvas\n    this.renderWorlds(frameState, false, startWorld, endWorld, worldWidth);\n\n    this.helper.finalizeDraw(\n      frameState,\n      this.dispatchPreComposeEvent,\n      this.dispatchPostComposeEvent\n    );\n    const canvas = this.helper.getCanvas();\n\n    if (this.hitDetectionEnabled_) {\n      this.renderWorlds(frameState, true, startWorld, endWorld, worldWidth);\n      this.hitRenderTarget_.clearCachedData();\n    }\n\n    this.postRender(gl, frameState);\n\n    return canvas;\n  }\n\n  /**\n   * Compute world params\n   * @private\n   * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n   * @return {Array<number>} The world start, end and width.\n   */\n  getWorldParameters_(frameState) {\n    const projection = frameState.viewState.projection;\n    const layer = this.getLayer();\n    const vectorSource = layer.getSource();\n    // FIXME fix hit detection isn't reliable when rendering multiple worlds\n    const multiWorld = vectorSource.getWrapX() && projection.canWrapX();\n    const projectionExtent = projection.getExtent();\n\n    const extent = frameState.extent;\n    const worldWidth = multiWorld ? getWidth(projectionExtent) : null;\n    const endWorld = multiWorld\n      ? Math.ceil((extent[2] - projectionExtent[2]) / worldWidth) + 1\n      : 1;\n\n    const startWorld = multiWorld\n      ? Math.floor((extent[0] - projectionExtent[0]) / worldWidth)\n      : 0;\n\n    return [startWorld, endWorld, worldWidth];\n  }\n\n  /**\n   * Determine whether renderFrame should be called.\n   * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n   * @return {boolean} Layer is ready to be rendered.\n   */\n  prepareFrameInternal(frameState) {\n    const layer = this.getLayer();\n    const vectorSource = layer.getSource();\n    const viewState = frameState.viewState;\n    const viewNotMoving =\n      !frameState.viewHints[ViewHint.ANIMATING] &&\n      !frameState.viewHints[ViewHint.INTERACTING];\n    const extentChanged = !equals(this.previousExtent_, frameState.extent);\n    const sourceChanged = this.sourceRevision_ < vectorSource.getRevision();\n\n    if (sourceChanged) {\n      this.sourceRevision_ = vectorSource.getRevision();\n    }\n\n    if (viewNotMoving && (extentChanged || sourceChanged)) {\n      const projection = viewState.projection;\n      const resolution = viewState.resolution;\n\n      const renderBuffer =\n        layer instanceof BaseVector ? layer.getRenderBuffer() : 0;\n      const extent = buffer(frameState.extent, renderBuffer * resolution);\n      vectorSource.loadFeatures(extent, resolution, projection);\n\n      this.rebuildBuffers_(frameState);\n      this.previousExtent_ = frameState.extent.slice();\n    }\n\n    this.helper.useProgram(this.program_, frameState);\n    this.helper.prepareDraw(frameState);\n\n    // write new data\n    this.helper.bindBuffer(this.verticesBuffer_);\n    this.helper.bindBuffer(this.indicesBuffer_);\n    this.helper.enableAttributes(this.attributes);\n\n    return true;\n  }\n\n  /**\n   * Rebuild internal webgl buffers based on current view extent; costly, should not be called too much\n   * @param {import(\"../../Map\").FrameState} frameState Frame state.\n   * @private\n   */\n  rebuildBuffers_(frameState) {\n    // saves the projection transform for the current frame state\n    const projectionTransform = createTransform();\n    this.helper.makeProjectionTransform(frameState, projectionTransform);\n\n    const baseInstructionLength = this.hitDetectionEnabled_ ? 7 : 2; // see below\n    const singleInstructionLength =\n      baseInstructionLength + this.customAttributes.length;\n    const totalSize = singleInstructionLength * this.featureCount_;\n    if (\n      !this.renderInstructions_ ||\n      this.renderInstructions_.length !== totalSize\n    ) {\n      this.renderInstructions_ = new Float32Array(totalSize);\n    }\n\n    // loop on features to fill the buffer\n    let featureCache, geometry;\n    const tmpCoords = [];\n    const tmpColor = [];\n    let idx = -1;\n    for (const featureUid in this.featureCache_) {\n      featureCache = this.featureCache_[featureUid];\n      geometry = /** @type {import(\"../../geom\").Point} */ (\n        featureCache.geometry\n      );\n      if (!geometry || geometry.getType() !== 'Point') {\n        continue;\n      }\n      tmpCoords[0] = geometry.getFlatCoordinates()[0];\n      tmpCoords[1] = geometry.getFlatCoordinates()[1];\n      applyTransform(projectionTransform, tmpCoords);\n\n      this.renderInstructions_[++idx] = tmpCoords[0];\n      this.renderInstructions_[++idx] = tmpCoords[1];\n\n      // for hit detection, the feature uid is saved in the opacity value\n      // and the index of the opacity value is encoded in the color values\n      if (this.hitDetectionEnabled_) {\n        const hitColor = colorEncodeId(idx + 5, tmpColor);\n        this.renderInstructions_[++idx] = hitColor[0];\n        this.renderInstructions_[++idx] = hitColor[1];\n        this.renderInstructions_[++idx] = hitColor[2];\n        this.renderInstructions_[++idx] = hitColor[3];\n        this.renderInstructions_[++idx] = Number(featureUid);\n      }\n\n      // pushing custom attributes\n      for (let j = 0; j < this.customAttributes.length; j++) {\n        const value = this.customAttributes[j].callback(\n          featureCache.feature,\n          featureCache.properties\n        );\n        this.renderInstructions_[++idx] = value;\n      }\n    }\n\n    /** @type {import('../../render/webgl/constants.js').WebGLWorkerGenerateBuffersMessage} */\n    const message = {\n      id: ++this.lastSentId,\n      type: WebGLWorkerMessageType.GENERATE_POINT_BUFFERS,\n      renderInstructions: this.renderInstructions_.buffer,\n      customAttributesSize: singleInstructionLength - 2,\n    };\n    // additional properties will be sent back as-is by the worker\n    message['projectionTransform'] = projectionTransform;\n    this.ready = false;\n    this.worker_.postMessage(message, [this.renderInstructions_.buffer]);\n    this.renderInstructions_ = null;\n  }\n\n  /**\n   * @param {import(\"../../coordinate.js\").Coordinate} coordinate Coordinate.\n   * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n   * @param {number} hitTolerance Hit tolerance in pixels.\n   * @param {import(\"../vector.js\").FeatureCallback<T>} callback Feature callback.\n   * @param {Array<import(\"../Map.js\").HitMatch<T>>} matches The hit detected matches with tolerance.\n   * @return {T|undefined} Callback result.\n   * @template T\n   */\n  forEachFeatureAtCoordinate(\n    coordinate,\n    frameState,\n    hitTolerance,\n    callback,\n    matches\n  ) {\n    assert(this.hitDetectionEnabled_, 66);\n    if (!this.renderInstructions_ || !this.hitDetectionEnabled_) {\n      return undefined;\n    }\n\n    const pixel = applyTransform(\n      frameState.coordinateToPixelTransform,\n      coordinate.slice()\n    );\n\n    const data = this.hitRenderTarget_.readPixel(pixel[0] / 2, pixel[1] / 2);\n    const color = [data[0] / 255, data[1] / 255, data[2] / 255, data[3] / 255];\n    const index = colorDecodeId(color);\n    const opacity = this.renderInstructions_[index];\n    const uid = Math.floor(opacity).toString();\n\n    const source = this.getLayer().getSource();\n    const feature = source.getFeatureByUid(uid);\n    if (feature) {\n      return callback(feature, this.getLayer(), null);\n    }\n    return undefined;\n  }\n\n  /**\n   * Render the world, either to the main framebuffer or to the hit framebuffer\n   * @param {import(\"../../Map.js\").FrameState} frameState current frame state\n   * @param {boolean} forHitDetection whether the rendering is for hit detection\n   * @param {number} startWorld the world to render in the first iteration\n   * @param {number} endWorld the last world to render\n   * @param {number} worldWidth the width of the worlds being rendered\n   */\n  renderWorlds(frameState, forHitDetection, startWorld, endWorld, worldWidth) {\n    let world = startWorld;\n\n    this.helper.useProgram(this.program_, frameState);\n\n    if (forHitDetection) {\n      this.hitRenderTarget_.setSize([\n        Math.floor(frameState.size[0] / 2),\n        Math.floor(frameState.size[1] / 2),\n      ]);\n      this.helper.prepareDrawToRenderTarget(\n        frameState,\n        this.hitRenderTarget_,\n        true\n      );\n    }\n\n    this.helper.bindBuffer(this.verticesBuffer_);\n    this.helper.bindBuffer(this.indicesBuffer_);\n    this.helper.enableAttributes(this.attributes);\n\n    do {\n      this.helper.makeProjectionTransform(frameState, this.currentTransform_);\n      translateTransform(this.currentTransform_, world * worldWidth, 0);\n      multiplyTransform(this.currentTransform_, this.invertRenderTransform_);\n      this.helper.applyUniforms(frameState);\n      this.helper.applyHitDetectionUniform(forHitDetection);\n      const renderCount = this.indicesBuffer_.getSize();\n      this.helper.drawElements(0, renderCount);\n    } while (++world < endWorld);\n  }\n\n  /**\n   * Clean up.\n   */\n  disposeInternal() {\n    this.worker_.terminate();\n    this.layer_ = null;\n    this.sourceListenKeys_.forEach(function (key) {\n      unlistenByKey(key);\n    });\n    this.sourceListenKeys_ = null;\n    super.disposeInternal();\n  }\n}\n\nexport default WebGLPointsLayerRenderer;\n","/**\n * @module ol/render/webgl/renderinstructions\n */\nimport {apply as applyTransform} from '../../transform.js';\nimport {transform2D} from '../../geom/flat/transform.js';\n\n/**\n * @param {Float32Array} renderInstructions Render instructions\n * @param {import('./VectorStyleRenderer.js').AttributeDefinitions} customAttributes Custom attributes\n * @param {import(\"./MixedGeometryBatch.js\").GeometryBatchItem} batchEntry Batch item\n * @param {number} currentIndex Current index\n * @return {number} The amount of values pushed\n */\nfunction pushCustomAttributesInRenderInstructions(\n  renderInstructions,\n  customAttributes,\n  batchEntry,\n  currentIndex\n) {\n  let shift = 0;\n  for (const key in customAttributes) {\n    const attr = customAttributes[key];\n    const value = attr.callback(batchEntry.feature);\n    renderInstructions[currentIndex + shift++] = value[0] || value;\n    if (!attr.size || attr.size === 1) {\n      continue;\n    }\n    renderInstructions[currentIndex + shift++] = value[1];\n    if (attr.size < 3) {\n      continue;\n    }\n    renderInstructions[currentIndex + shift++] = value[2];\n    if (attr.size < 4) {\n      continue;\n    }\n    renderInstructions[currentIndex + shift++] = value[3];\n  }\n  return shift;\n}\n\n/**\n * @param {import('./VectorStyleRenderer.js').AttributeDefinitions} customAttributes Custom attributes\n * @return {number} Cumulated size of all attributes\n */\nexport function getCustomAttributesSize(customAttributes) {\n  return Object.keys(customAttributes).reduce(\n    (prev, curr) => prev + (customAttributes[curr].size || 1),\n    0\n  );\n}\n\n/**\n * Render instructions for lines are structured like so:\n * [ x0, y0, customAttr0, ... , xN, yN, customAttrN ]\n * @param {import(\"./MixedGeometryBatch.js\").PointGeometryBatch} batch Point geometry batch\n * @param {Float32Array} renderInstructions Render instructions\n * @param {import('./VectorStyleRenderer.js').AttributeDefinitions} customAttributes Custom attributes\n * @param {import(\"../../transform.js\").Transform} transform Transform to apply to coordinates\n * @return {Float32Array} Generated render instructions\n */\nexport function generatePointRenderInstructions(\n  batch,\n  renderInstructions,\n  customAttributes,\n  transform\n) {\n  // here we anticipate the amount of render instructions for points:\n  // 2 instructions per vertex for position (x and y)\n  // + 1 instruction per vertex per custom attributes\n  const totalInstructionsCount =\n    (2 + getCustomAttributesSize(customAttributes)) * batch.geometriesCount;\n  if (\n    !renderInstructions ||\n    renderInstructions.length !== totalInstructionsCount\n  ) {\n    renderInstructions = new Float32Array(totalInstructionsCount);\n  }\n\n  // loop on features to fill the render instructions\n  const tmpCoords = [];\n  let renderIndex = 0;\n  for (const featureUid in batch.entries) {\n    const batchEntry = batch.entries[featureUid];\n    for (let i = 0, ii = batchEntry.flatCoordss.length; i < ii; i++) {\n      tmpCoords[0] = batchEntry.flatCoordss[i][0];\n      tmpCoords[1] = batchEntry.flatCoordss[i][1];\n      applyTransform(transform, tmpCoords);\n\n      renderInstructions[renderIndex++] = tmpCoords[0];\n      renderInstructions[renderIndex++] = tmpCoords[1];\n      renderIndex += pushCustomAttributesInRenderInstructions(\n        renderInstructions,\n        customAttributes,\n        batchEntry,\n        renderIndex\n      );\n    }\n  }\n  return renderInstructions;\n}\n\n/**\n * Render instructions for lines are structured like so:\n * [ customAttr0, ... , customAttrN, numberOfVertices0, x0, y0, ... , xN, yN, numberOfVertices1, ... ]\n * @param {import(\"./MixedGeometryBatch.js\").LineStringGeometryBatch} batch Line String geometry batch\n * @param {Float32Array} renderInstructions Render instructions\n * @param {import('./VectorStyleRenderer.js').AttributeDefinitions} customAttributes Custom attributes\n * @param {import(\"../../transform.js\").Transform} transform Transform to apply to coordinates\n * @return {Float32Array} Generated render instructions\n */\nexport function generateLineStringRenderInstructions(\n  batch,\n  renderInstructions,\n  customAttributes,\n  transform\n) {\n  // here we anticipate the amount of render instructions for lines:\n  // 2 instructions per vertex for position (x and y)\n  // + 1 instruction per line per custom attributes\n  // + 1 instruction per line (for vertices count)\n  const totalInstructionsCount =\n    2 * batch.verticesCount +\n    (1 + getCustomAttributesSize(customAttributes)) * batch.geometriesCount;\n  if (\n    !renderInstructions ||\n    renderInstructions.length !== totalInstructionsCount\n  ) {\n    renderInstructions = new Float32Array(totalInstructionsCount);\n  }\n\n  // loop on features to fill the render instructions\n  const flatCoords = [];\n  let renderIndex = 0;\n  for (const featureUid in batch.entries) {\n    const batchEntry = batch.entries[featureUid];\n    for (let i = 0, ii = batchEntry.flatCoordss.length; i < ii; i++) {\n      flatCoords.length = batchEntry.flatCoordss[i].length;\n      transform2D(\n        batchEntry.flatCoordss[i],\n        0,\n        flatCoords.length,\n        2,\n        transform,\n        flatCoords\n      );\n      renderIndex += pushCustomAttributesInRenderInstructions(\n        renderInstructions,\n        customAttributes,\n        batchEntry,\n        renderIndex\n      );\n\n      // vertices count\n      renderInstructions[renderIndex++] = flatCoords.length / 2;\n\n      // looping on points for positions\n      for (let j = 0, jj = flatCoords.length; j < jj; j += 2) {\n        renderInstructions[renderIndex++] = flatCoords[j];\n        renderInstructions[renderIndex++] = flatCoords[j + 1];\n      }\n    }\n  }\n  return renderInstructions;\n}\n\n/**\n * Render instructions for polygons are structured like so:\n * [ customAttr0, ..., customAttrN, numberOfRings, numberOfVerticesInRing0, ..., numberOfVerticesInRingN, x0, y0, ..., xN, yN, numberOfRings,... ]\n * @param {import(\"./MixedGeometryBatch.js\").PolygonGeometryBatch} batch Polygon geometry batch\n * @param {Float32Array} renderInstructions Render instructions\n * @param {import('./VectorStyleRenderer.js').AttributeDefinitions} customAttributes Custom attributes\n * @param {import(\"../../transform.js\").Transform} transform Transform to apply to coordinates\n * @return {Float32Array} Generated render instructions\n */\nexport function generatePolygonRenderInstructions(\n  batch,\n  renderInstructions,\n  customAttributes,\n  transform\n) {\n  // here we anticipate the amount of render instructions for polygons:\n  // 2 instructions per vertex for position (x and y)\n  // + 1 instruction per polygon per custom attributes\n  // + 1 instruction per polygon (for vertices count in polygon)\n  // + 1 instruction per ring (for vertices count in ring)\n  const totalInstructionsCount =\n    2 * batch.verticesCount +\n    (1 + getCustomAttributesSize(customAttributes)) * batch.geometriesCount +\n    batch.ringsCount;\n  if (\n    !renderInstructions ||\n    renderInstructions.length !== totalInstructionsCount\n  ) {\n    renderInstructions = new Float32Array(totalInstructionsCount);\n  }\n\n  // loop on features to fill the render instructions\n  const flatCoords = [];\n  let renderIndex = 0;\n  for (const featureUid in batch.entries) {\n    const batchEntry = batch.entries[featureUid];\n    for (let i = 0, ii = batchEntry.flatCoordss.length; i < ii; i++) {\n      flatCoords.length = batchEntry.flatCoordss[i].length;\n      transform2D(\n        batchEntry.flatCoordss[i],\n        0,\n        flatCoords.length,\n        2,\n        transform,\n        flatCoords\n      );\n      renderIndex += pushCustomAttributesInRenderInstructions(\n        renderInstructions,\n        customAttributes,\n        batchEntry,\n        renderIndex\n      );\n\n      // ring count\n      renderInstructions[renderIndex++] =\n        batchEntry.ringsVerticesCounts[i].length;\n\n      // vertices count in each ring\n      for (\n        let j = 0, jj = batchEntry.ringsVerticesCounts[i].length;\n        j < jj;\n        j++\n      ) {\n        renderInstructions[renderIndex++] =\n          batchEntry.ringsVerticesCounts[i][j];\n      }\n\n      // looping on points for positions\n      for (let j = 0, jj = flatCoords.length; j < jj; j += 2) {\n        renderInstructions[renderIndex++] = flatCoords[j];\n        renderInstructions[renderIndex++] = flatCoords[j + 1];\n      }\n    }\n  }\n  return renderInstructions;\n}\n","/**\n * @module ol/render/webgl/VectorStyleRenderer\n */\nimport WebGLArrayBuffer from '../../webgl/Buffer.js';\nimport {ARRAY_BUFFER, DYNAMIC_DRAW, ELEMENT_ARRAY_BUFFER} from '../../webgl.js';\nimport {AttributeType} from '../../webgl/Helper.js';\nimport {WebGLWorkerMessageType} from './constants.js';\nimport {\n  create as createTransform,\n  makeInverse as makeInverseTransform,\n} from '../../transform.js';\nimport {create as createWebGLWorker} from '../../worker/webgl.js';\nimport {\n  generateLineStringRenderInstructions,\n  generatePointRenderInstructions,\n  generatePolygonRenderInstructions,\n  getCustomAttributesSize,\n} from './renderinstructions.js';\nimport {parseLiteralStyle} from '../../webgl/styleparser.js';\n\nconst WEBGL_WORKER = createWebGLWorker();\nlet workerMessageCounter = 0;\n\n/**\n * Names of attributes made available to the vertex shader.\n * Please note: changing these *will* break custom shaders!\n * @enum {string}\n */\nexport const Attributes = {\n  POSITION: 'a_position',\n  INDEX: 'a_index',\n  SEGMENT_START: 'a_segmentStart',\n  SEGMENT_END: 'a_segmentEnd',\n  PARAMETERS: 'a_parameters',\n};\n\n/**\n * @typedef {Object} AttributeDefinition A description of a custom attribute to be passed on to the GPU, with a value different\n * for each feature.\n * @property {number} [size] Amount of numerical values composing the attribute, either 1, 2, 3 or 4; in case size is > 1, the return value\n * of the callback should be an array; if unspecified, assumed to be a single float value\n * @property {function(import(\"../../Feature\").FeatureLike):number|Array<number>} callback This callback computes the numerical value of the\n * attribute for a given feature.\n */\n\n/**\n * @typedef {Object<string, AttributeDefinition>} AttributeDefinitions\n * @typedef {Object<string, import(\"../../webgl/Helper\").UniformValue>} UniformDefinitions\n */\n\n/**\n * @typedef {Object} WebGLBuffers\n * @property {Array<WebGLArrayBuffer>} polygonBuffers Array containing indices and vertices buffers for polygons\n * @property {Array<WebGLArrayBuffer>} lineStringBuffers Array containing indices and vertices buffers for line strings\n * @property {Array<WebGLArrayBuffer>} pointBuffers Array containing indices and vertices buffers for points\n * @property {import(\"../../transform.js\").Transform} invertVerticesTransform Inverse of the transform applied when generating buffers\n */\n\n/**\n * @typedef {Object} RenderInstructions\n * @property {Float32Array|null} polygonInstructions Polygon instructions; null if nothing to render\n * @property {Float32Array|null} lineStringInstructions LineString instructions; null if nothing to render\n * @property {Float32Array|null} pointInstructions Point instructions; null if nothing to render\n */\n\n/**\n * @typedef {Object} ShaderProgram An object containing both shaders (vertex and fragment)\n * @property {string} vertex Vertex shader source\n * @property {string} fragment Fragment shader source\n */\n\n/**\n * @typedef {Object} StyleShaders\n * @property {ShaderProgram} [fill] Shaders for filling polygons.\n * @property {ShaderProgram} [stroke] Shaders for line strings and polygon strokes.\n * @property {ShaderProgram} [symbol] Shaders for symbols.\n * @property {AttributeDefinitions} [attributes] Custom attributes made available in the vertex shaders.\n * Default shaders rely on the attributes in {@link Attributes}.\n * @property {UniformDefinitions} [uniforms] Additional uniforms usable in shaders.\n */\n\n/**\n * @typedef {import('../../style/literal.js').LiteralStyle|StyleShaders} VectorStyle\n */\n\n/**\n * @classdesc This class is responsible for:\n * 1. generate WebGL buffers according to a provided style, using a MixedGeometryBatch as input\n * 2. rendering geometries contained in said buffers\n *\n * A layer renderer will typically maintain several of these in order to have several styles rendered separately.\n *\n * A VectorStyleRenderer instance can be created either from a literal style or from shaders using either\n * `VectorStyleRenderer.fromStyle` or `VectorStyleRenderer.fromShaders`.\n *\n * The `generateBuffers` method returns a promise resolving to WebGL buffers that are intended to be rendered by the\n * same renderer.\n */\nclass VectorStyleRenderer {\n  /**\n   * @param {VectorStyle} styleOrShaders Literal style or custom shaders\n   * @param {import('../../webgl/Helper.js').default} helper Helper\n   */\n  constructor(styleOrShaders, helper) {\n    this.helper_ = helper;\n\n    let shaders = /** @type {StyleShaders} */ (styleOrShaders);\n\n    // TODO: improve discrimination between shaders and style\n    const isShaders =\n      'fill' in styleOrShaders ||\n      'stroke' in styleOrShaders ||\n      ('symbol' in styleOrShaders && 'vertex' in styleOrShaders.symbol);\n    if (!isShaders) {\n      const parseResult = parseLiteralStyle(\n        /** @type {import('../../style/literal.js').LiteralStyle} */ (\n          styleOrShaders\n        )\n      );\n      shaders = {\n        fill: {\n          vertex: parseResult.builder.getFillVertexShader(),\n          fragment: parseResult.builder.getFillFragmentShader(),\n        },\n        stroke: {\n          vertex: parseResult.builder.getStrokeVertexShader(),\n          fragment: parseResult.builder.getStrokeFragmentShader(),\n        },\n        symbol: {\n          vertex: parseResult.builder.getSymbolVertexShader(),\n          fragment: parseResult.builder.getSymbolFragmentShader(),\n        },\n        attributes: parseResult.attributes,\n        uniforms: parseResult.uniforms,\n      };\n    }\n\n    /**\n     * @type {boolean}\n     * @private\n     */\n    this.hasFill_ = !!shaders.fill?.vertex;\n    if (this.hasFill_) {\n      this.fillVertexShader_ = shaders.fill.vertex;\n      this.fillFragmentShader_ = shaders.fill.fragment;\n      this.fillProgram_ = this.helper_.getProgram(\n        this.fillFragmentShader_,\n        this.fillVertexShader_\n      );\n    }\n\n    /**\n     * @type {boolean}\n     * @private\n     */\n    this.hasStroke_ = !!shaders.stroke?.vertex;\n    if (this.hasStroke_) {\n      this.strokeVertexShader_ = shaders.stroke && shaders.stroke.vertex;\n      this.strokeFragmentShader_ = shaders.stroke && shaders.stroke.fragment;\n      this.strokeProgram_ = this.helper_.getProgram(\n        this.strokeFragmentShader_,\n        this.strokeVertexShader_\n      );\n    }\n\n    /**\n     * @type {boolean}\n     * @private\n     */\n    this.hasSymbol_ = !!shaders.symbol?.vertex;\n    if (this.hasSymbol_) {\n      this.symbolVertexShader_ = shaders.symbol && shaders.symbol.vertex;\n      this.symbolFragmentShader_ = shaders.symbol && shaders.symbol.fragment;\n      this.symbolProgram_ = this.helper_.getProgram(\n        this.symbolFragmentShader_,\n        this.symbolVertexShader_\n      );\n    }\n\n    this.customAttributes_ = shaders.attributes;\n    this.uniforms_ = shaders.uniforms;\n\n    const customAttributesDesc = Object.keys(this.customAttributes_).map(\n      (name) => ({\n        name: `a_${name}`,\n        size: this.customAttributes_[name].size || 1,\n        type: AttributeType.FLOAT,\n      })\n    );\n    /**\n     * @type {Array<import('../../webgl/Helper.js').AttributeDescription>}\n     * @private\n     */\n    this.polygonAttributesDesc_ = [\n      {\n        name: Attributes.POSITION,\n        size: 2,\n        type: AttributeType.FLOAT,\n      },\n      ...customAttributesDesc,\n    ];\n    /**\n     * @type {Array<import('../../webgl/Helper.js').AttributeDescription>}\n     * @private\n     */\n    this.lineStringAttributesDesc_ = [\n      {\n        name: Attributes.SEGMENT_START,\n        size: 2,\n        type: AttributeType.FLOAT,\n      },\n      {\n        name: Attributes.SEGMENT_END,\n        size: 2,\n        type: AttributeType.FLOAT,\n      },\n      {\n        name: Attributes.PARAMETERS,\n        size: 1,\n        type: AttributeType.FLOAT,\n      },\n      ...customAttributesDesc,\n    ];\n    /**\n     * @type {Array<import('../../webgl/Helper.js').AttributeDescription>}\n     * @private\n     */\n    this.pointAttributesDesc_ = [\n      {\n        name: Attributes.POSITION,\n        size: 2,\n        type: AttributeType.FLOAT,\n      },\n      {\n        name: Attributes.INDEX,\n        size: 1,\n        type: AttributeType.FLOAT,\n      },\n      ...customAttributesDesc,\n    ];\n  }\n\n  /**\n   * @param {import('./MixedGeometryBatch.js').default} geometryBatch Geometry batch\n   * @param {import(\"../../transform.js\").Transform} transform Transform to apply to coordinates\n   * @return {Promise<WebGLBuffers>} A promise resolving to WebGL buffers\n   */\n  async generateBuffers(geometryBatch, transform) {\n    const renderInstructions = this.generateRenderInstructions_(\n      geometryBatch,\n      transform\n    );\n    const [polygonBuffers, lineStringBuffers, pointBuffers] = await Promise.all(\n      [\n        this.generateBuffersForType_(\n          renderInstructions.polygonInstructions,\n          'Polygon',\n          transform\n        ),\n        this.generateBuffersForType_(\n          renderInstructions.lineStringInstructions,\n          'LineString',\n          transform\n        ),\n        this.generateBuffersForType_(\n          renderInstructions.pointInstructions,\n          'Point',\n          transform\n        ),\n      ]\n    );\n    // also return the inverse of the transform that was applied when generating buffers\n    const invertVerticesTransform = makeInverseTransform(\n      createTransform(),\n      transform\n    );\n    return {\n      polygonBuffers: polygonBuffers,\n      lineStringBuffers: lineStringBuffers,\n      pointBuffers: pointBuffers,\n      invertVerticesTransform: invertVerticesTransform,\n    };\n  }\n\n  /**\n   * @param {import('./MixedGeometryBatch.js').default} geometryBatch Geometry batch\n   * @param {import(\"../../transform.js\").Transform} transform Transform to apply to coordinates\n   * @return {RenderInstructions} Render instructions\n   * @private\n   */\n  generateRenderInstructions_(geometryBatch, transform) {\n    const polygonInstructions = this.hasFill_\n      ? generatePolygonRenderInstructions(\n          geometryBatch.polygonBatch,\n          new Float32Array(0),\n          this.customAttributes_,\n          transform\n        )\n      : null;\n    const lineStringInstructions = this.hasStroke_\n      ? generateLineStringRenderInstructions(\n          geometryBatch.lineStringBatch,\n          new Float32Array(0),\n          this.customAttributes_,\n          transform\n        )\n      : null;\n    const pointInstructions = this.hasSymbol_\n      ? generatePointRenderInstructions(\n          geometryBatch.pointBatch,\n          new Float32Array(0),\n          this.customAttributes_,\n          transform\n        )\n      : null;\n\n    return {\n      polygonInstructions,\n      lineStringInstructions,\n      pointInstructions,\n    };\n  }\n\n  /**\n   * @param {Float32Array|null} renderInstructions Render instructions\n   * @param {import(\"../../geom/Geometry.js\").Type} geometryType Geometry type\n   * @param {import(\"../../transform.js\").Transform} transform Transform to apply to coordinates\n   * @return {Promise<Array<WebGLArrayBuffer>>|null} Indices buffer and vertices buffer; null if nothing to render\n   * @private\n   */\n  generateBuffersForType_(renderInstructions, geometryType, transform) {\n    if (renderInstructions === null) {\n      return null;\n    }\n\n    const messageId = workerMessageCounter++;\n    let messageType;\n    switch (geometryType) {\n      case 'Polygon':\n        messageType = WebGLWorkerMessageType.GENERATE_POLYGON_BUFFERS;\n        break;\n      case 'LineString':\n        messageType = WebGLWorkerMessageType.GENERATE_LINE_STRING_BUFFERS;\n        break;\n      case 'Point':\n        messageType = WebGLWorkerMessageType.GENERATE_POINT_BUFFERS;\n        break;\n      default:\n      // pass\n    }\n\n    /** @type {import('./constants.js').WebGLWorkerGenerateBuffersMessage} */\n    const message = {\n      id: messageId,\n      type: messageType,\n      renderInstructions: renderInstructions.buffer,\n      renderInstructionsTransform: transform,\n      customAttributesSize: getCustomAttributesSize(this.customAttributes_),\n    };\n    WEBGL_WORKER.postMessage(message, [renderInstructions.buffer]);\n\n    // leave ownership of render instructions\n    renderInstructions = null;\n\n    return new Promise((resolve) => {\n      /**\n       * @param {*} event Event.\n       */\n      const handleMessage = (event) => {\n        const received = event.data;\n\n        // this is not the response to our request: skip\n        if (received.id !== messageId) {\n          return;\n        }\n\n        // we've received our response: stop listening\n        WEBGL_WORKER.removeEventListener('message', handleMessage);\n\n        // the helper has disposed in the meantime; the promise will not be resolved\n        if (!this.helper_.getGL()) {\n          return;\n        }\n\n        // copy & flush received buffers to GPU\n        const verticesBuffer = new WebGLArrayBuffer(\n          ARRAY_BUFFER,\n          DYNAMIC_DRAW\n        ).fromArrayBuffer(received.vertexBuffer);\n        const indicesBuffer = new WebGLArrayBuffer(\n          ELEMENT_ARRAY_BUFFER,\n          DYNAMIC_DRAW\n        ).fromArrayBuffer(received.indexBuffer);\n        this.helper_.flushBufferData(verticesBuffer);\n        this.helper_.flushBufferData(indicesBuffer);\n\n        resolve([indicesBuffer, verticesBuffer]);\n      };\n\n      WEBGL_WORKER.addEventListener('message', handleMessage);\n    });\n  }\n\n  /**\n   * Render the geometries in the given buffers.\n   * @param {WebGLBuffers} buffers WebGL Buffers to draw\n   * @param {import(\"../../Map.js\").FrameState} frameState Frame state\n   * @param {function(): void} preRenderCallback This callback will be called right before drawing, and can be used to set uniforms\n   */\n  render(buffers, frameState, preRenderCallback) {\n    this.hasFill_ &&\n      this.renderInternal_(\n        buffers.polygonBuffers[0],\n        buffers.polygonBuffers[1],\n        this.fillProgram_,\n        this.polygonAttributesDesc_,\n        frameState,\n        preRenderCallback\n      );\n    this.hasStroke_ &&\n      this.renderInternal_(\n        buffers.lineStringBuffers[0],\n        buffers.lineStringBuffers[1],\n        this.strokeProgram_,\n        this.lineStringAttributesDesc_,\n        frameState,\n        preRenderCallback\n      );\n    this.hasSymbol_ &&\n      this.renderInternal_(\n        buffers.pointBuffers[0],\n        buffers.pointBuffers[1],\n        this.symbolProgram_,\n        this.pointAttributesDesc_,\n        frameState,\n        preRenderCallback\n      );\n  }\n\n  /**\n   * @param {WebGLArrayBuffer} indicesBuffer Indices buffer\n   * @param {WebGLArrayBuffer} verticesBuffer Vertices buffer\n   * @param {WebGLProgram} program Program\n   * @param {Array<import('../../webgl/Helper.js').AttributeDescription>} attributes Attribute descriptions\n   * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n   * @param {function(): void} preRenderCallback This callback will be called right before drawing, and can be used to set uniforms\n   * @private\n   */\n  renderInternal_(\n    indicesBuffer,\n    verticesBuffer,\n    program,\n    attributes,\n    frameState,\n    preRenderCallback\n  ) {\n    this.helper_.useProgram(program, frameState);\n    this.helper_.bindBuffer(verticesBuffer);\n    this.helper_.bindBuffer(indicesBuffer);\n    this.helper_.enableAttributes(attributes);\n    preRenderCallback();\n    const renderCount = indicesBuffer.getSize();\n    this.helper_.drawElements(0, renderCount);\n  }\n}\n\nexport default VectorStyleRenderer;\n","/**\n * @module ol/renderer/webgl/VectorLayer\n */\nimport BaseVector from '../../layer/BaseVector.js';\nimport MixedGeometryBatch from '../../render/webgl/MixedGeometryBatch.js';\nimport VectorEventType from '../../source/VectorEventType.js';\nimport VectorStyleRenderer from '../../render/webgl/VectorStyleRenderer.js';\nimport ViewHint from '../../ViewHint.js';\nimport WebGLLayerRenderer from './Layer.js';\nimport {DefaultUniform} from '../../webgl/Helper.js';\nimport {buffer, createEmpty, equals, getWidth} from '../../extent.js';\nimport {\n  create as createMat4,\n  fromTransform as mat4FromTransform,\n} from '../../vec/mat4.js';\nimport {\n  create as createTransform,\n  multiply as multiplyTransform,\n  setFromArray as setFromTransform,\n  translate as translateTransform,\n} from '../../transform.js';\nimport {listen, unlistenByKey} from '../../events.js';\n\nexport const Uniforms = {\n  ...DefaultUniform,\n  RENDER_EXTENT: 'u_renderExtent', // intersection of layer, source, and view extent\n  GLOBAL_ALPHA: 'u_globalAlpha',\n};\n\n/**\n * @typedef {import('../../render/webgl/VectorStyleRenderer.js').VectorStyle} VectorStyle\n */\n\n/**\n * @typedef {Object} Options\n * @property {string} [className='ol-layer'] A CSS class name to set to the canvas element.\n * @property {VectorStyle|Array<VectorStyle>} style Vector style as literal style or shaders; can also accept an array of styles\n * @property {Array<import(\"./Layer\").PostProcessesOptions>} [postProcesses] Post-processes definitions\n */\n\n/**\n * @classdesc\n * Experimental WebGL vector renderer. Supports polygons, lines and points:\n *  * Polygons are broken down into triangles\n *  * Lines are rendered as strips of quads\n *  * Points are rendered as quads\n *\n * You need to provide vertex and fragment shaders as well as custom attributes for each type of geometry. All shaders\n * can access the uniforms in the {@link module:ol/webgl/Helper~DefaultUniform} enum.\n * The vertex shaders can access the following attributes depending on the geometry type:\n *  * For polygons: {@link module:ol/render/webgl/PolygonBatchRenderer~Attributes}\n *  * For line strings: {@link module:ol/render/webgl/LineStringBatchRenderer~Attributes}\n *  * For points: {@link module:ol/render/webgl/PointBatchRenderer~Attributes}\n *\n * Please note that the fragment shaders output should have premultiplied alpha, otherwise visual anomalies may occur.\n *\n * Note: this uses {@link module:ol/webgl/Helper~WebGLHelper} internally.\n */\nclass WebGLVectorLayerRenderer extends WebGLLayerRenderer {\n  /**\n   * @param {import(\"../../layer/Layer.js\").default} layer Layer.\n   * @param {Options} options Options.\n   */\n  constructor(layer, options) {\n    const uniforms = {\n      [Uniforms.RENDER_EXTENT]: [0, 0, 0, 0],\n      [Uniforms.GLOBAL_ALPHA]: 1,\n    };\n\n    super(layer, {\n      uniforms: uniforms,\n      postProcesses: options.postProcesses,\n    });\n\n    this.sourceRevision_ = -1;\n\n    this.previousExtent_ = createEmpty();\n\n    /**\n     * This transform is updated on every frame and is the composition of:\n     * - invert of the world->screen transform that was used when rebuilding buffers (see `this.renderTransform_`)\n     * - current world->screen transform\n     * @type {import(\"../../transform.js\").Transform}\n     * @private\n     */\n    this.currentTransform_ = createTransform();\n\n    this.tmpTransform_ = createTransform();\n    this.tmpMat4_ = createMat4();\n\n    /**\n     * @type {import(\"../../transform.js\").Transform}\n     * @private\n     */\n    this.currentFrameStateTransform_ = createTransform();\n\n    /**\n     * @type {Array<VectorStyle>}\n     * @private\n     */\n    this.styles_ = [];\n\n    /**\n     * @type {Array<VectorStyleRenderer>}\n     * @private\n     */\n    this.styleRenderers_ = [];\n\n    /**\n     * @type {Array<import('../../render/webgl/VectorStyleRenderer.js').WebGLBuffers>}\n     * @private\n     */\n    this.buffers_ = [];\n\n    this.applyOptions_(options);\n\n    /**\n     * @private\n     */\n    this.batch_ = new MixedGeometryBatch();\n\n    const source = this.getLayer().getSource();\n    this.batch_.addFeatures(source.getFeatures());\n    this.sourceListenKeys_ = [\n      listen(\n        source,\n        VectorEventType.ADDFEATURE,\n        this.handleSourceFeatureAdded_,\n        this\n      ),\n      listen(\n        source,\n        VectorEventType.CHANGEFEATURE,\n        this.handleSourceFeatureChanged_,\n        this\n      ),\n      listen(\n        source,\n        VectorEventType.REMOVEFEATURE,\n        this.handleSourceFeatureDelete_,\n        this\n      ),\n      listen(\n        source,\n        VectorEventType.CLEAR,\n        this.handleSourceFeatureClear_,\n        this\n      ),\n    ];\n  }\n\n  /**\n   * @param {Options} options Options.\n   * @private\n   */\n  applyOptions_(options) {\n    this.styles_ = Array.isArray(options.style)\n      ? options.style\n      : [options.style];\n  }\n\n  /**\n   * @private\n   */\n  createRenderers_() {\n    this.buffers_ = [];\n    this.styleRenderers_ = this.styles_.map(\n      (style) => new VectorStyleRenderer(style, this.helper)\n    );\n  }\n\n  reset(options) {\n    this.applyOptions_(options);\n    if (this.helper) {\n      this.createRenderers_();\n    }\n    super.reset(options);\n  }\n\n  afterHelperCreated() {\n    this.createRenderers_();\n  }\n\n  /**\n   * @param {import(\"../../source/Vector.js\").VectorSourceEvent} event Event.\n   * @private\n   */\n  handleSourceFeatureAdded_(event) {\n    const feature = event.feature;\n    this.batch_.addFeature(feature);\n  }\n\n  /**\n   * @param {import(\"../../source/Vector.js\").VectorSourceEvent} event Event.\n   * @private\n   */\n  handleSourceFeatureChanged_(event) {\n    const feature = event.feature;\n    this.batch_.changeFeature(feature);\n  }\n\n  /**\n   * @param {import(\"../../source/Vector.js\").VectorSourceEvent} event Event.\n   * @private\n   */\n  handleSourceFeatureDelete_(event) {\n    const feature = event.feature;\n    this.batch_.removeFeature(feature);\n  }\n\n  /**\n   * @private\n   */\n  handleSourceFeatureClear_() {\n    this.batch_.clear();\n  }\n\n  /**\n   * @param {import(\"../../transform.js\").Transform} batchInvertTransform Inverse of the transformation in which geometries are expressed\n   * @private\n   */\n  applyUniforms_(batchInvertTransform) {\n    // world to screen matrix\n    setFromTransform(this.tmpTransform_, this.currentFrameStateTransform_);\n    multiplyTransform(this.tmpTransform_, batchInvertTransform);\n    this.helper.setUniformMatrixValue(\n      Uniforms.PROJECTION_MATRIX,\n      mat4FromTransform(this.tmpMat4_, this.tmpTransform_)\n    );\n  }\n\n  /**\n   * Render the layer.\n   * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n   * @return {HTMLElement} The rendered element.\n   */\n  renderFrame(frameState) {\n    const gl = this.helper.getGL();\n    this.preRender(gl, frameState);\n\n    this.helper.prepareDraw(frameState);\n    this.currentFrameStateTransform_ = this.helper.makeProjectionTransform(\n      frameState,\n      this.currentFrameStateTransform_\n    );\n\n    const layer = this.getLayer();\n    const vectorSource = layer.getSource();\n    const projection = frameState.viewState.projection;\n    const multiWorld = vectorSource.getWrapX() && projection.canWrapX();\n    const projectionExtent = projection.getExtent();\n    const extent = frameState.extent;\n    const worldWidth = multiWorld ? getWidth(projectionExtent) : null;\n    const endWorld = multiWorld\n      ? Math.ceil((extent[2] - projectionExtent[2]) / worldWidth) + 1\n      : 1;\n    let world = multiWorld\n      ? Math.floor((extent[0] - projectionExtent[0]) / worldWidth)\n      : 0;\n\n    translateTransform(this.currentFrameStateTransform_, world * worldWidth, 0);\n    do {\n      for (let i = 0, ii = this.styleRenderers_.length; i < ii; i++) {\n        const renderer = this.styleRenderers_[i];\n        const buffers = this.buffers_[i];\n        if (!buffers) {\n          continue;\n        }\n        renderer.render(buffers, frameState, () => {\n          this.applyUniforms_(buffers.invertVerticesTransform);\n        });\n      }\n      translateTransform(this.currentFrameStateTransform_, worldWidth, 0);\n    } while (++world < endWorld);\n\n    this.helper.finalizeDraw(frameState);\n\n    const canvas = this.helper.getCanvas();\n    const layerState = frameState.layerStatesArray[frameState.layerIndex];\n    const opacity = layerState.opacity;\n    if (opacity !== parseFloat(canvas.style.opacity)) {\n      canvas.style.opacity = String(opacity);\n    }\n\n    this.postRender(gl, frameState);\n    return canvas;\n  }\n\n  /**\n   * Determine whether renderFrame should be called.\n   * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n   * @return {boolean} Layer is ready to be rendered.\n   */\n  prepareFrameInternal(frameState) {\n    const layer = this.getLayer();\n    const vectorSource = layer.getSource();\n    const viewState = frameState.viewState;\n    const viewNotMoving =\n      !frameState.viewHints[ViewHint.ANIMATING] &&\n      !frameState.viewHints[ViewHint.INTERACTING];\n    const extentChanged = !equals(this.previousExtent_, frameState.extent);\n    const sourceChanged = this.sourceRevision_ < vectorSource.getRevision();\n\n    if (sourceChanged) {\n      this.sourceRevision_ = vectorSource.getRevision();\n    }\n\n    if (viewNotMoving && (extentChanged || sourceChanged)) {\n      const projection = viewState.projection;\n      const resolution = viewState.resolution;\n\n      const renderBuffer =\n        layer instanceof BaseVector ? layer.getRenderBuffer() : 0;\n      const extent = buffer(frameState.extent, renderBuffer * resolution);\n      vectorSource.loadFeatures(extent, resolution, projection);\n\n      this.ready = false;\n\n      const transform = this.helper.makeProjectionTransform(\n        frameState,\n        createTransform()\n      );\n\n      const generatePromises = this.styleRenderers_.map((renderer, i) =>\n        renderer.generateBuffers(this.batch_, transform).then((buffers) => {\n          this.buffers_[i] = buffers;\n        })\n      );\n      Promise.all(generatePromises).then(() => {\n        this.ready = true;\n        this.getLayer().changed();\n      });\n\n      this.previousExtent_ = frameState.extent.slice();\n    }\n\n    return true;\n  }\n\n  /**\n   * @param {import(\"../../coordinate.js\").Coordinate} coordinate Coordinate.\n   * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n   * @param {number} hitTolerance Hit tolerance in pixels.\n   * @param {import(\"../vector.js\").FeatureCallback<T>} callback Feature callback.\n   * @param {Array<import(\"../Map.js\").HitMatch<T>>} matches The hit detected matches with tolerance.\n   * @return {T|undefined} Callback result.\n   * @template T\n   */\n  forEachFeatureAtCoordinate(\n    coordinate,\n    frameState,\n    hitTolerance,\n    callback,\n    matches\n  ) {\n    return undefined;\n  }\n\n  /**\n   * Clean up.\n   */\n  disposeInternal() {\n    this.sourceListenKeys_.forEach(function (key) {\n      unlistenByKey(key);\n    });\n    this.sourceListenKeys_ = null;\n    super.disposeInternal();\n  }\n}\n\nexport default WebGLVectorLayerRenderer;\n","/**\n * @module ol/renderer/webgl/VectorTileLayer\n */\nimport EventType from '../../events/EventType.js';\nimport TileGeometry from '../../webgl/TileGeometry.js';\nimport VectorStyleRenderer from '../../render/webgl/VectorStyleRenderer.js';\nimport WebGLBaseTileLayerRenderer, {Uniforms} from './TileLayerBase.js';\nimport {\n  create as createMat4,\n  fromTransform as mat4FromTransform,\n} from '../../vec/mat4.js';\nimport {\n  create as createTransform,\n  makeInverse as makeInverseTransform,\n  multiply as multiplyTransform,\n  setFromArray as setFromTransform,\n} from '../../transform.js';\nimport {getIntersection} from '../../extent.js';\n\n/**\n * @typedef {import('../../render/webgl/VectorStyleRenderer.js').VectorStyle} VectorStyle\n */\n\n/**\n * @typedef {Object} Options\n * @property {VectorStyle|Array<VectorStyle>} style Vector style as literal style or shaders; can also accept an array of styles\n * @property {number} [cacheSize=512] The vector tile cache size.\n */\n\n/**\n * @typedef {import(\"../../layer/BaseTile.js\").default} LayerType\n */\n\n/**\n * @classdesc\n * WebGL renderer for vector tile layers. Experimental.\n * @extends {WebGLBaseTileLayerRenderer<LayerType>}\n */\nclass WebGLVectorTileLayerRenderer extends WebGLBaseTileLayerRenderer {\n  /**\n   * @param {LayerType} tileLayer Tile layer.\n   * @param {Options} options Options.\n   */\n  constructor(tileLayer, options) {\n    super(tileLayer, options);\n\n    /**\n     * @type {Array<VectorStyle>}\n     * @private\n     */\n    this.styles_ = [];\n\n    /**\n     * @type {Array<VectorStyleRenderer>}\n     * @private\n     */\n    this.styleRenderers_ = [];\n\n    /**\n     * This transform is updated on every frame and is the composition of:\n     * - invert of the world->screen transform that was used when rebuilding buffers (see `this.renderTransform_`)\n     * - current world->screen transform\n     * @type {import(\"../../transform.js\").Transform}\n     * @private\n     */\n    this.currentFrameStateTransform_ = createTransform();\n\n    this.tmpTransform_ = createTransform();\n    this.tmpMat4_ = createMat4();\n\n    this.applyOptions_(options);\n  }\n\n  /**\n   * @param {Options} options Options.\n   */\n  reset(options) {\n    super.reset(options);\n\n    this.applyOptions_(options);\n    if (this.helper) {\n      this.createRenderers_();\n    }\n  }\n\n  /**\n   * @param {Options} options Options.\n   * @private\n   */\n  applyOptions_(options) {\n    this.styles_ = Array.isArray(options.style)\n      ? options.style\n      : [options.style];\n  }\n\n  /**\n   * @private\n   */\n  createRenderers_() {\n    this.styleRenderers_ = this.styles_.map(\n      (style) => new VectorStyleRenderer(style, this.helper)\n    );\n  }\n\n  afterHelperCreated() {\n    this.createRenderers_();\n  }\n\n  createTileRepresentation(options) {\n    const tileRep = new TileGeometry(options, this.styleRenderers_);\n    // redraw the layer when the tile is ready\n    const listener = () => {\n      if (tileRep.ready) {\n        this.getLayer().changed();\n        tileRep.removeEventListener(EventType.CHANGE, listener);\n      }\n    };\n    tileRep.addEventListener(EventType.CHANGE, listener);\n    return tileRep;\n  }\n\n  beforeTilesRender(frameState, tilesWithAlpha) {\n    super.beforeTilesRender(frameState, true); // always consider that tiles need alpha blending\n    this.helper.makeProjectionTransform(\n      frameState,\n      this.currentFrameStateTransform_\n    );\n  }\n\n  /**\n   * @param {number} alpha Alpha value of the tile\n   * @param {import(\"../../extent.js\").Extent} renderExtent Which extent to restrict drawing to\n   * @param {import(\"../../transform.js\").Transform} batchInvertTransform Inverse of the transformation in which tile geometries are expressed\n   * @private\n   */\n  applyUniforms_(alpha, renderExtent, batchInvertTransform) {\n    // world to screen matrix\n    setFromTransform(this.tmpTransform_, this.currentFrameStateTransform_);\n    multiplyTransform(this.tmpTransform_, batchInvertTransform);\n    this.helper.setUniformMatrixValue(\n      Uniforms.PROJECTION_MATRIX,\n      mat4FromTransform(this.tmpMat4_, this.tmpTransform_)\n    );\n\n    // screen to world matrix\n    makeInverseTransform(this.tmpTransform_, this.currentFrameStateTransform_);\n    this.helper.setUniformMatrixValue(\n      Uniforms.SCREEN_TO_WORLD_MATRIX,\n      mat4FromTransform(this.tmpMat4_, this.tmpTransform_)\n    );\n\n    this.helper.setUniformFloatValue(Uniforms.GLOBAL_ALPHA, alpha);\n    this.helper.setUniformFloatVec4(Uniforms.RENDER_EXTENT, renderExtent);\n  }\n\n  renderTile(\n    tileRepresentation,\n    tileTransform,\n    frameState,\n    renderExtent,\n    tileResolution,\n    tileSize,\n    tileOrigin,\n    tileExtent,\n    depth,\n    gutter,\n    alpha\n  ) {\n    const gutterExtent = getIntersection(tileExtent, renderExtent, tileExtent);\n\n    for (let i = 0, ii = this.styleRenderers_.length; i < ii; i++) {\n      const renderer = this.styleRenderers_[i];\n      const buffers = tileRepresentation.buffers[i];\n      if (!buffers) {\n        continue;\n      }\n      renderer.render(buffers, frameState, () => {\n        this.applyUniforms_(\n          alpha,\n          gutterExtent,\n          buffers.invertVerticesTransform\n        );\n      });\n    }\n  }\n\n  /**\n   * Render declutter items for this layer\n   * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n   */\n  renderDeclutter(frameState) {}\n\n  /**\n   * Clean up.\n   */\n  disposeInternal() {\n    super.disposeInternal();\n  }\n}\n\nexport default WebGLVectorTileLayerRenderer;\n","/**\n * @module ol/render/canvas/Instruction\n */\n\n/**\n * @enum {number}\n */\nconst Instruction = {\n  BEGIN_GEOMETRY: 0,\n  BEGIN_PATH: 1,\n  CIRCLE: 2,\n  CLOSE_PATH: 3,\n  CUSTOM: 4,\n  DRAW_CHARS: 5,\n  DRAW_IMAGE: 6,\n  END_GEOMETRY: 7,\n  FILL: 8,\n  MOVE_TO_LINE_TO: 9,\n  SET_FILL_STYLE: 10,\n  SET_STROKE_STYLE: 11,\n  STROKE: 12,\n};\n\n/**\n * @type {Array<Instruction>}\n */\nexport const fillInstruction = [Instruction.FILL];\n\n/**\n * @type {Array<Instruction>}\n */\nexport const strokeInstruction = [Instruction.STROKE];\n\n/**\n * @type {Array<Instruction>}\n */\nexport const beginPathInstruction = [Instruction.BEGIN_PATH];\n\n/**\n * @type {Array<Instruction>}\n */\nexport const closePathInstruction = [Instruction.CLOSE_PATH];\n\nexport default Instruction;\n","/**\n * @module ol/render/canvas/Builder\n */\nimport CanvasInstruction from './Instruction.js';\nimport Relationship from '../../extent/Relationship.js';\nimport VectorContext from '../VectorContext.js';\nimport {asColorLike} from '../../colorlike.js';\nimport {\n  buffer,\n  clone,\n  containsCoordinate,\n  coordinateRelationship,\n} from '../../extent.js';\nimport {\n  defaultFillStyle,\n  defaultLineCap,\n  defaultLineDash,\n  defaultLineDashOffset,\n  defaultLineJoin,\n  defaultLineWidth,\n  defaultMiterLimit,\n  defaultStrokeStyle,\n} from '../canvas.js';\nimport {equals, reverseSubArray} from '../../array.js';\nimport {\n  inflateCoordinates,\n  inflateCoordinatesArray,\n  inflateMultiCoordinatesArray,\n} from '../../geom/flat/inflate.js';\n\nclass CanvasBuilder extends VectorContext {\n  /**\n   * @param {number} tolerance Tolerance.\n   * @param {import(\"../../extent.js\").Extent} maxExtent Maximum extent.\n   * @param {number} resolution Resolution.\n   * @param {number} pixelRatio Pixel ratio.\n   */\n  constructor(tolerance, maxExtent, resolution, pixelRatio) {\n    super();\n\n    /**\n     * @protected\n     * @type {number}\n     */\n    this.tolerance = tolerance;\n\n    /**\n     * @protected\n     * @const\n     * @type {import(\"../../extent.js\").Extent}\n     */\n    this.maxExtent = maxExtent;\n\n    /**\n     * @protected\n     * @type {number}\n     */\n    this.pixelRatio = pixelRatio;\n\n    /**\n     * @protected\n     * @type {number}\n     */\n    this.maxLineWidth = 0;\n\n    /**\n     * @protected\n     * @const\n     * @type {number}\n     */\n    this.resolution = resolution;\n\n    /**\n     * @private\n     * @type {Array<*>}\n     */\n    this.beginGeometryInstruction1_ = null;\n\n    /**\n     * @private\n     * @type {Array<*>}\n     */\n    this.beginGeometryInstruction2_ = null;\n\n    /**\n     * @private\n     * @type {import(\"../../extent.js\").Extent}\n     */\n    this.bufferedMaxExtent_ = null;\n\n    /**\n     * @protected\n     * @type {Array<*>}\n     */\n    this.instructions = [];\n\n    /**\n     * @protected\n     * @type {Array<number>}\n     */\n    this.coordinates = [];\n\n    /**\n     * @private\n     * @type {import(\"../../coordinate.js\").Coordinate}\n     */\n    this.tmpCoordinate_ = [];\n\n    /**\n     * @protected\n     * @type {Array<*>}\n     */\n    this.hitDetectionInstructions = [];\n\n    /**\n     * @protected\n     * @type {import(\"../canvas.js\").FillStrokeState}\n     */\n    this.state = /** @type {import(\"../canvas.js\").FillStrokeState} */ ({});\n  }\n\n  /**\n   * @protected\n   * @param {Array<number>} dashArray Dash array.\n   * @return {Array<number>} Dash array with pixel ratio applied\n   */\n  applyPixelRatio(dashArray) {\n    const pixelRatio = this.pixelRatio;\n    return pixelRatio == 1\n      ? dashArray\n      : dashArray.map(function (dash) {\n          return dash * pixelRatio;\n        });\n  }\n\n  /**\n   * @param {Array<number>} flatCoordinates Flat coordinates.\n   * @param {number} stride Stride.\n   * @protected\n   * @return {number} My end\n   */\n  appendFlatPointCoordinates(flatCoordinates, stride) {\n    const extent = this.getBufferedMaxExtent();\n    const tmpCoord = this.tmpCoordinate_;\n    const coordinates = this.coordinates;\n    let myEnd = coordinates.length;\n    for (let i = 0, ii = flatCoordinates.length; i < ii; i += stride) {\n      tmpCoord[0] = flatCoordinates[i];\n      tmpCoord[1] = flatCoordinates[i + 1];\n      if (containsCoordinate(extent, tmpCoord)) {\n        coordinates[myEnd++] = tmpCoord[0];\n        coordinates[myEnd++] = tmpCoord[1];\n      }\n    }\n    return myEnd;\n  }\n\n  /**\n   * @param {Array<number>} flatCoordinates Flat coordinates.\n   * @param {number} offset Offset.\n   * @param {number} end End.\n   * @param {number} stride Stride.\n   * @param {boolean} closed Last input coordinate equals first.\n   * @param {boolean} skipFirst Skip first coordinate.\n   * @protected\n   * @return {number} My end.\n   */\n  appendFlatLineCoordinates(\n    flatCoordinates,\n    offset,\n    end,\n    stride,\n    closed,\n    skipFirst\n  ) {\n    const coordinates = this.coordinates;\n    let myEnd = coordinates.length;\n    const extent = this.getBufferedMaxExtent();\n    if (skipFirst) {\n      offset += stride;\n    }\n    let lastXCoord = flatCoordinates[offset];\n    let lastYCoord = flatCoordinates[offset + 1];\n    const nextCoord = this.tmpCoordinate_;\n    let skipped = true;\n\n    let i, lastRel, nextRel;\n    for (i = offset + stride; i < end; i += stride) {\n      nextCoord[0] = flatCoordinates[i];\n      nextCoord[1] = flatCoordinates[i + 1];\n      nextRel = coordinateRelationship(extent, nextCoord);\n      if (nextRel !== lastRel) {\n        if (skipped) {\n          coordinates[myEnd++] = lastXCoord;\n          coordinates[myEnd++] = lastYCoord;\n          skipped = false;\n        }\n        coordinates[myEnd++] = nextCoord[0];\n        coordinates[myEnd++] = nextCoord[1];\n      } else if (nextRel === Relationship.INTERSECTING) {\n        coordinates[myEnd++] = nextCoord[0];\n        coordinates[myEnd++] = nextCoord[1];\n        skipped = false;\n      } else {\n        skipped = true;\n      }\n      lastXCoord = nextCoord[0];\n      lastYCoord = nextCoord[1];\n      lastRel = nextRel;\n    }\n\n    // Last coordinate equals first or only one point to append:\n    if ((closed && skipped) || i === offset + stride) {\n      coordinates[myEnd++] = lastXCoord;\n      coordinates[myEnd++] = lastYCoord;\n    }\n    return myEnd;\n  }\n\n  /**\n   * @param {Array<number>} flatCoordinates Flat coordinates.\n   * @param {number} offset Offset.\n   * @param {Array<number>} ends Ends.\n   * @param {number} stride Stride.\n   * @param {Array<number>} builderEnds Builder ends.\n   * @return {number} Offset.\n   */\n  drawCustomCoordinates_(flatCoordinates, offset, ends, stride, builderEnds) {\n    for (let i = 0, ii = ends.length; i < ii; ++i) {\n      const end = ends[i];\n      const builderEnd = this.appendFlatLineCoordinates(\n        flatCoordinates,\n        offset,\n        end,\n        stride,\n        false,\n        false\n      );\n      builderEnds.push(builderEnd);\n      offset = end;\n    }\n    return offset;\n  }\n\n  /**\n   * @param {import(\"../../geom/SimpleGeometry.js\").default} geometry Geometry.\n   * @param {import(\"../../Feature.js\").FeatureLike} feature Feature.\n   * @param {Function} renderer Renderer.\n   * @param {Function} hitDetectionRenderer Renderer.\n   */\n  drawCustom(geometry, feature, renderer, hitDetectionRenderer) {\n    this.beginGeometry(geometry, feature);\n\n    const type = geometry.getType();\n    const stride = geometry.getStride();\n    const builderBegin = this.coordinates.length;\n\n    let flatCoordinates, builderEnd, builderEnds, builderEndss;\n    let offset;\n\n    switch (type) {\n      case 'MultiPolygon':\n        flatCoordinates =\n          /** @type {import(\"../../geom/MultiPolygon.js\").default} */ (\n            geometry\n          ).getOrientedFlatCoordinates();\n        builderEndss = [];\n        const endss =\n          /** @type {import(\"../../geom/MultiPolygon.js\").default} */ (\n            geometry\n          ).getEndss();\n        offset = 0;\n        for (let i = 0, ii = endss.length; i < ii; ++i) {\n          const myEnds = [];\n          offset = this.drawCustomCoordinates_(\n            flatCoordinates,\n            offset,\n            endss[i],\n            stride,\n            myEnds\n          );\n          builderEndss.push(myEnds);\n        }\n        this.instructions.push([\n          CanvasInstruction.CUSTOM,\n          builderBegin,\n          builderEndss,\n          geometry,\n          renderer,\n          inflateMultiCoordinatesArray,\n        ]);\n        this.hitDetectionInstructions.push([\n          CanvasInstruction.CUSTOM,\n          builderBegin,\n          builderEndss,\n          geometry,\n          hitDetectionRenderer || renderer,\n          inflateMultiCoordinatesArray,\n        ]);\n        break;\n      case 'Polygon':\n      case 'MultiLineString':\n        builderEnds = [];\n        flatCoordinates =\n          type == 'Polygon'\n            ? /** @type {import(\"../../geom/Polygon.js\").default} */ (\n                geometry\n              ).getOrientedFlatCoordinates()\n            : geometry.getFlatCoordinates();\n        offset = this.drawCustomCoordinates_(\n          flatCoordinates,\n          0,\n          /** @type {import(\"../../geom/Polygon.js\").default|import(\"../../geom/MultiLineString.js\").default} */ (\n            geometry\n          ).getEnds(),\n          stride,\n          builderEnds\n        );\n        this.instructions.push([\n          CanvasInstruction.CUSTOM,\n          builderBegin,\n          builderEnds,\n          geometry,\n          renderer,\n          inflateCoordinatesArray,\n        ]);\n        this.hitDetectionInstructions.push([\n          CanvasInstruction.CUSTOM,\n          builderBegin,\n          builderEnds,\n          geometry,\n          hitDetectionRenderer || renderer,\n          inflateCoordinatesArray,\n        ]);\n        break;\n      case 'LineString':\n      case 'Circle':\n        flatCoordinates = geometry.getFlatCoordinates();\n        builderEnd = this.appendFlatLineCoordinates(\n          flatCoordinates,\n          0,\n          flatCoordinates.length,\n          stride,\n          false,\n          false\n        );\n        this.instructions.push([\n          CanvasInstruction.CUSTOM,\n          builderBegin,\n          builderEnd,\n          geometry,\n          renderer,\n          inflateCoordinates,\n        ]);\n        this.hitDetectionInstructions.push([\n          CanvasInstruction.CUSTOM,\n          builderBegin,\n          builderEnd,\n          geometry,\n          hitDetectionRenderer || renderer,\n          inflateCoordinates,\n        ]);\n        break;\n      case 'MultiPoint':\n        flatCoordinates = geometry.getFlatCoordinates();\n        builderEnd = this.appendFlatPointCoordinates(flatCoordinates, stride);\n\n        if (builderEnd > builderBegin) {\n          this.instructions.push([\n            CanvasInstruction.CUSTOM,\n            builderBegin,\n            builderEnd,\n            geometry,\n            renderer,\n            inflateCoordinates,\n          ]);\n          this.hitDetectionInstructions.push([\n            CanvasInstruction.CUSTOM,\n            builderBegin,\n            builderEnd,\n            geometry,\n            hitDetectionRenderer || renderer,\n            inflateCoordinates,\n          ]);\n        }\n        break;\n      case 'Point':\n        flatCoordinates = geometry.getFlatCoordinates();\n        this.coordinates.push(flatCoordinates[0], flatCoordinates[1]);\n        builderEnd = this.coordinates.length;\n\n        this.instructions.push([\n          CanvasInstruction.CUSTOM,\n          builderBegin,\n          builderEnd,\n          geometry,\n          renderer,\n        ]);\n        this.hitDetectionInstructions.push([\n          CanvasInstruction.CUSTOM,\n          builderBegin,\n          builderEnd,\n          geometry,\n          hitDetectionRenderer || renderer,\n        ]);\n        break;\n      default:\n    }\n    this.endGeometry(feature);\n  }\n\n  /**\n   * @protected\n   * @param {import(\"../../geom/Geometry\").default|import(\"../Feature.js\").default} geometry The geometry.\n   * @param {import(\"../../Feature.js\").FeatureLike} feature Feature.\n   */\n  beginGeometry(geometry, feature) {\n    this.beginGeometryInstruction1_ = [\n      CanvasInstruction.BEGIN_GEOMETRY,\n      feature,\n      0,\n      geometry,\n    ];\n    this.instructions.push(this.beginGeometryInstruction1_);\n    this.beginGeometryInstruction2_ = [\n      CanvasInstruction.BEGIN_GEOMETRY,\n      feature,\n      0,\n      geometry,\n    ];\n    this.hitDetectionInstructions.push(this.beginGeometryInstruction2_);\n  }\n\n  /**\n   * @return {import(\"../canvas.js\").SerializableInstructions} the serializable instructions.\n   */\n  finish() {\n    return {\n      instructions: this.instructions,\n      hitDetectionInstructions: this.hitDetectionInstructions,\n      coordinates: this.coordinates,\n    };\n  }\n\n  /**\n   * Reverse the hit detection instructions.\n   */\n  reverseHitDetectionInstructions() {\n    const hitDetectionInstructions = this.hitDetectionInstructions;\n    // step 1 - reverse array\n    hitDetectionInstructions.reverse();\n    // step 2 - reverse instructions within geometry blocks\n    let i;\n    const n = hitDetectionInstructions.length;\n    let instruction;\n    let type;\n    let begin = -1;\n    for (i = 0; i < n; ++i) {\n      instruction = hitDetectionInstructions[i];\n      type = /** @type {import(\"./Instruction.js\").default} */ (instruction[0]);\n      if (type == CanvasInstruction.END_GEOMETRY) {\n        begin = i;\n      } else if (type == CanvasInstruction.BEGIN_GEOMETRY) {\n        instruction[2] = i;\n        reverseSubArray(this.hitDetectionInstructions, begin, i);\n        begin = -1;\n      }\n    }\n  }\n\n  /**\n   * @param {import(\"../../style/Fill.js\").default} fillStyle Fill style.\n   * @param {import(\"../../style/Stroke.js\").default} strokeStyle Stroke style.\n   */\n  setFillStrokeStyle(fillStyle, strokeStyle) {\n    const state = this.state;\n    if (fillStyle) {\n      const fillStyleColor = fillStyle.getColor();\n      state.fillStyle = asColorLike(\n        fillStyleColor ? fillStyleColor : defaultFillStyle\n      );\n    } else {\n      state.fillStyle = undefined;\n    }\n    if (strokeStyle) {\n      const strokeStyleColor = strokeStyle.getColor();\n      state.strokeStyle = asColorLike(\n        strokeStyleColor ? strokeStyleColor : defaultStrokeStyle\n      );\n      const strokeStyleLineCap = strokeStyle.getLineCap();\n      state.lineCap =\n        strokeStyleLineCap !== undefined ? strokeStyleLineCap : defaultLineCap;\n      const strokeStyleLineDash = strokeStyle.getLineDash();\n      state.lineDash = strokeStyleLineDash\n        ? strokeStyleLineDash.slice()\n        : defaultLineDash;\n      const strokeStyleLineDashOffset = strokeStyle.getLineDashOffset();\n      state.lineDashOffset = strokeStyleLineDashOffset\n        ? strokeStyleLineDashOffset\n        : defaultLineDashOffset;\n      const strokeStyleLineJoin = strokeStyle.getLineJoin();\n      state.lineJoin =\n        strokeStyleLineJoin !== undefined\n          ? strokeStyleLineJoin\n          : defaultLineJoin;\n      const strokeStyleWidth = strokeStyle.getWidth();\n      state.lineWidth =\n        strokeStyleWidth !== undefined ? strokeStyleWidth : defaultLineWidth;\n      const strokeStyleMiterLimit = strokeStyle.getMiterLimit();\n      state.miterLimit =\n        strokeStyleMiterLimit !== undefined\n          ? strokeStyleMiterLimit\n          : defaultMiterLimit;\n\n      if (state.lineWidth > this.maxLineWidth) {\n        this.maxLineWidth = state.lineWidth;\n        // invalidate the buffered max extent cache\n        this.bufferedMaxExtent_ = null;\n      }\n    } else {\n      state.strokeStyle = undefined;\n      state.lineCap = undefined;\n      state.lineDash = null;\n      state.lineDashOffset = undefined;\n      state.lineJoin = undefined;\n      state.lineWidth = undefined;\n      state.miterLimit = undefined;\n    }\n  }\n\n  /**\n   * @param {import(\"../canvas.js\").FillStrokeState} state State.\n   * @return {Array<*>} Fill instruction.\n   */\n  createFill(state) {\n    const fillStyle = state.fillStyle;\n    /** @type {Array<*>} */\n    const fillInstruction = [CanvasInstruction.SET_FILL_STYLE, fillStyle];\n    if (typeof fillStyle !== 'string') {\n      // Fill is a pattern or gradient - align it!\n      fillInstruction.push(true);\n    }\n    return fillInstruction;\n  }\n\n  /**\n   * @param {import(\"../canvas.js\").FillStrokeState} state State.\n   */\n  applyStroke(state) {\n    this.instructions.push(this.createStroke(state));\n  }\n\n  /**\n   * @param {import(\"../canvas.js\").FillStrokeState} state State.\n   * @return {Array<*>} Stroke instruction.\n   */\n  createStroke(state) {\n    return [\n      CanvasInstruction.SET_STROKE_STYLE,\n      state.strokeStyle,\n      state.lineWidth * this.pixelRatio,\n      state.lineCap,\n      state.lineJoin,\n      state.miterLimit,\n      this.applyPixelRatio(state.lineDash),\n      state.lineDashOffset * this.pixelRatio,\n    ];\n  }\n\n  /**\n   * @param {import(\"../canvas.js\").FillStrokeState} state State.\n   * @param {function(this:CanvasBuilder, import(\"../canvas.js\").FillStrokeState):Array<*>} createFill Create fill.\n   */\n  updateFillStyle(state, createFill) {\n    const fillStyle = state.fillStyle;\n    if (typeof fillStyle !== 'string' || state.currentFillStyle != fillStyle) {\n      if (fillStyle !== undefined) {\n        this.instructions.push(createFill.call(this, state));\n      }\n      state.currentFillStyle = fillStyle;\n    }\n  }\n\n  /**\n   * @param {import(\"../canvas.js\").FillStrokeState} state State.\n   * @param {function(this:CanvasBuilder, import(\"../canvas.js\").FillStrokeState): void} applyStroke Apply stroke.\n   */\n  updateStrokeStyle(state, applyStroke) {\n    const strokeStyle = state.strokeStyle;\n    const lineCap = state.lineCap;\n    const lineDash = state.lineDash;\n    const lineDashOffset = state.lineDashOffset;\n    const lineJoin = state.lineJoin;\n    const lineWidth = state.lineWidth;\n    const miterLimit = state.miterLimit;\n    if (\n      state.currentStrokeStyle != strokeStyle ||\n      state.currentLineCap != lineCap ||\n      (lineDash != state.currentLineDash &&\n        !equals(state.currentLineDash, lineDash)) ||\n      state.currentLineDashOffset != lineDashOffset ||\n      state.currentLineJoin != lineJoin ||\n      state.currentLineWidth != lineWidth ||\n      state.currentMiterLimit != miterLimit\n    ) {\n      if (strokeStyle !== undefined) {\n        applyStroke.call(this, state);\n      }\n      state.currentStrokeStyle = strokeStyle;\n      state.currentLineCap = lineCap;\n      state.currentLineDash = lineDash;\n      state.currentLineDashOffset = lineDashOffset;\n      state.currentLineJoin = lineJoin;\n      state.currentLineWidth = lineWidth;\n      state.currentMiterLimit = miterLimit;\n    }\n  }\n\n  /**\n   * @param {import(\"../../Feature.js\").FeatureLike} feature Feature.\n   */\n  endGeometry(feature) {\n    this.beginGeometryInstruction1_[2] = this.instructions.length;\n    this.beginGeometryInstruction1_ = null;\n    this.beginGeometryInstruction2_[2] = this.hitDetectionInstructions.length;\n    this.beginGeometryInstruction2_ = null;\n    const endGeometryInstruction = [CanvasInstruction.END_GEOMETRY, feature];\n    this.instructions.push(endGeometryInstruction);\n    this.hitDetectionInstructions.push(endGeometryInstruction);\n  }\n\n  /**\n   * Get the buffered rendering extent.  Rendering will be clipped to the extent\n   * provided to the constructor.  To account for symbolizers that may intersect\n   * this extent, we calculate a buffered extent (e.g. based on stroke width).\n   * @return {import(\"../../extent.js\").Extent} The buffered rendering extent.\n   * @protected\n   */\n  getBufferedMaxExtent() {\n    if (!this.bufferedMaxExtent_) {\n      this.bufferedMaxExtent_ = clone(this.maxExtent);\n      if (this.maxLineWidth > 0) {\n        const width = (this.resolution * (this.maxLineWidth + 1)) / 2;\n        buffer(this.bufferedMaxExtent_, width, this.bufferedMaxExtent_);\n      }\n    }\n    return this.bufferedMaxExtent_;\n  }\n}\n\nexport default CanvasBuilder;\n","/**\n * @module ol/render/canvas/ImageBuilder\n */\nimport CanvasBuilder from './Builder.js';\nimport CanvasInstruction from './Instruction.js';\n\nclass CanvasImageBuilder extends CanvasBuilder {\n  /**\n   * @param {number} tolerance Tolerance.\n   * @param {import(\"../../extent.js\").Extent} maxExtent Maximum extent.\n   * @param {number} resolution Resolution.\n   * @param {number} pixelRatio Pixel ratio.\n   */\n  constructor(tolerance, maxExtent, resolution, pixelRatio) {\n    super(tolerance, maxExtent, resolution, pixelRatio);\n\n    /**\n     * @private\n     * @type {HTMLCanvasElement|HTMLVideoElement|HTMLImageElement}\n     */\n    this.hitDetectionImage_ = null;\n\n    /**\n     * @private\n     * @type {HTMLCanvasElement|HTMLVideoElement|HTMLImageElement}\n     */\n    this.image_ = null;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.imagePixelRatio_ = undefined;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.anchorX_ = undefined;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.anchorY_ = undefined;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.height_ = undefined;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.opacity_ = undefined;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.originX_ = undefined;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.originY_ = undefined;\n\n    /**\n     * @private\n     * @type {boolean|undefined}\n     */\n    this.rotateWithView_ = undefined;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.rotation_ = undefined;\n\n    /**\n     * @private\n     * @type {import(\"../../size.js\").Size|undefined}\n     */\n    this.scale_ = undefined;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.width_ = undefined;\n\n    /**\n     * @private\n     * @type {\"declutter\"|\"obstacle\"|\"none\"|undefined}\n     */\n    this.declutterMode_ = undefined;\n\n    /**\n     * Data shared with a text builder for combined decluttering.\n     * @private\n     * @type {import(\"../canvas.js\").DeclutterImageWithText}\n     */\n    this.declutterImageWithText_ = undefined;\n  }\n\n  /**\n   * @param {import(\"../../geom/Point.js\").default|import(\"../Feature.js\").default} pointGeometry Point geometry.\n   * @param {import(\"../../Feature.js\").FeatureLike} feature Feature.\n   */\n  drawPoint(pointGeometry, feature) {\n    if (!this.image_) {\n      return;\n    }\n    this.beginGeometry(pointGeometry, feature);\n    const flatCoordinates = pointGeometry.getFlatCoordinates();\n    const stride = pointGeometry.getStride();\n    const myBegin = this.coordinates.length;\n    const myEnd = this.appendFlatPointCoordinates(flatCoordinates, stride);\n    this.instructions.push([\n      CanvasInstruction.DRAW_IMAGE,\n      myBegin,\n      myEnd,\n      this.image_,\n      // Remaining arguments to DRAW_IMAGE are in alphabetical order\n      this.anchorX_ * this.imagePixelRatio_,\n      this.anchorY_ * this.imagePixelRatio_,\n      Math.ceil(this.height_ * this.imagePixelRatio_),\n      this.opacity_,\n      this.originX_ * this.imagePixelRatio_,\n      this.originY_ * this.imagePixelRatio_,\n      this.rotateWithView_,\n      this.rotation_,\n      [\n        (this.scale_[0] * this.pixelRatio) / this.imagePixelRatio_,\n        (this.scale_[1] * this.pixelRatio) / this.imagePixelRatio_,\n      ],\n      Math.ceil(this.width_ * this.imagePixelRatio_),\n      this.declutterMode_,\n      this.declutterImageWithText_,\n    ]);\n    this.hitDetectionInstructions.push([\n      CanvasInstruction.DRAW_IMAGE,\n      myBegin,\n      myEnd,\n      this.hitDetectionImage_,\n      // Remaining arguments to DRAW_IMAGE are in alphabetical order\n      this.anchorX_,\n      this.anchorY_,\n      this.height_,\n      this.opacity_,\n      this.originX_,\n      this.originY_,\n      this.rotateWithView_,\n      this.rotation_,\n      this.scale_,\n      this.width_,\n      this.declutterMode_,\n      this.declutterImageWithText_,\n    ]);\n    this.endGeometry(feature);\n  }\n\n  /**\n   * @param {import(\"../../geom/MultiPoint.js\").default|import(\"../Feature.js\").default} multiPointGeometry MultiPoint geometry.\n   * @param {import(\"../../Feature.js\").FeatureLike} feature Feature.\n   */\n  drawMultiPoint(multiPointGeometry, feature) {\n    if (!this.image_) {\n      return;\n    }\n    this.beginGeometry(multiPointGeometry, feature);\n    const flatCoordinates = multiPointGeometry.getFlatCoordinates();\n    const stride = multiPointGeometry.getStride();\n    const myBegin = this.coordinates.length;\n    const myEnd = this.appendFlatPointCoordinates(flatCoordinates, stride);\n    this.instructions.push([\n      CanvasInstruction.DRAW_IMAGE,\n      myBegin,\n      myEnd,\n      this.image_,\n      // Remaining arguments to DRAW_IMAGE are in alphabetical order\n      this.anchorX_ * this.imagePixelRatio_,\n      this.anchorY_ * this.imagePixelRatio_,\n      Math.ceil(this.height_ * this.imagePixelRatio_),\n      this.opacity_,\n      this.originX_ * this.imagePixelRatio_,\n      this.originY_ * this.imagePixelRatio_,\n      this.rotateWithView_,\n      this.rotation_,\n      [\n        (this.scale_[0] * this.pixelRatio) / this.imagePixelRatio_,\n        (this.scale_[1] * this.pixelRatio) / this.imagePixelRatio_,\n      ],\n      Math.ceil(this.width_ * this.imagePixelRatio_),\n      this.declutterMode_,\n      this.declutterImageWithText_,\n    ]);\n    this.hitDetectionInstructions.push([\n      CanvasInstruction.DRAW_IMAGE,\n      myBegin,\n      myEnd,\n      this.hitDetectionImage_,\n      // Remaining arguments to DRAW_IMAGE are in alphabetical order\n      this.anchorX_,\n      this.anchorY_,\n      this.height_,\n      this.opacity_,\n      this.originX_,\n      this.originY_,\n      this.rotateWithView_,\n      this.rotation_,\n      this.scale_,\n      this.width_,\n      this.declutterMode_,\n      this.declutterImageWithText_,\n    ]);\n    this.endGeometry(feature);\n  }\n\n  /**\n   * @return {import(\"../canvas.js\").SerializableInstructions} the serializable instructions.\n   */\n  finish() {\n    this.reverseHitDetectionInstructions();\n    // FIXME this doesn't really protect us against further calls to draw*Geometry\n    this.anchorX_ = undefined;\n    this.anchorY_ = undefined;\n    this.hitDetectionImage_ = null;\n    this.image_ = null;\n    this.imagePixelRatio_ = undefined;\n    this.height_ = undefined;\n    this.scale_ = undefined;\n    this.opacity_ = undefined;\n    this.originX_ = undefined;\n    this.originY_ = undefined;\n    this.rotateWithView_ = undefined;\n    this.rotation_ = undefined;\n    this.width_ = undefined;\n    return super.finish();\n  }\n\n  /**\n   * @param {import(\"../../style/Image.js\").default} imageStyle Image style.\n   * @param {Object} [sharedData] Shared data.\n   */\n  setImageStyle(imageStyle, sharedData) {\n    const anchor = imageStyle.getAnchor();\n    const size = imageStyle.getSize();\n    const origin = imageStyle.getOrigin();\n    this.imagePixelRatio_ = imageStyle.getPixelRatio(this.pixelRatio);\n    this.anchorX_ = anchor[0];\n    this.anchorY_ = anchor[1];\n    this.hitDetectionImage_ = imageStyle.getHitDetectionImage();\n    this.image_ = imageStyle.getImage(this.pixelRatio);\n    this.height_ = size[1];\n    this.opacity_ = imageStyle.getOpacity();\n    this.originX_ = origin[0];\n    this.originY_ = origin[1];\n    this.rotateWithView_ = imageStyle.getRotateWithView();\n    this.rotation_ = imageStyle.getRotation();\n    this.scale_ = imageStyle.getScaleArray();\n    this.width_ = size[0];\n    this.declutterMode_ = imageStyle.getDeclutterMode();\n    this.declutterImageWithText_ = sharedData;\n  }\n}\n\nexport default CanvasImageBuilder;\n","/**\n * @module ol/render/canvas/LineStringBuilder\n */\nimport CanvasBuilder from './Builder.js';\nimport CanvasInstruction, {\n  beginPathInstruction,\n  strokeInstruction,\n} from './Instruction.js';\nimport {defaultLineDash, defaultLineDashOffset} from '../canvas.js';\n\nclass CanvasLineStringBuilder extends CanvasBuilder {\n  /**\n   * @param {number} tolerance Tolerance.\n   * @param {import(\"../../extent.js\").Extent} maxExtent Maximum extent.\n   * @param {number} resolution Resolution.\n   * @param {number} pixelRatio Pixel ratio.\n   */\n  constructor(tolerance, maxExtent, resolution, pixelRatio) {\n    super(tolerance, maxExtent, resolution, pixelRatio);\n  }\n\n  /**\n   * @param {Array<number>} flatCoordinates Flat coordinates.\n   * @param {number} offset Offset.\n   * @param {number} end End.\n   * @param {number} stride Stride.\n   * @private\n   * @return {number} end.\n   */\n  drawFlatCoordinates_(flatCoordinates, offset, end, stride) {\n    const myBegin = this.coordinates.length;\n    const myEnd = this.appendFlatLineCoordinates(\n      flatCoordinates,\n      offset,\n      end,\n      stride,\n      false,\n      false\n    );\n    const moveToLineToInstruction = [\n      CanvasInstruction.MOVE_TO_LINE_TO,\n      myBegin,\n      myEnd,\n    ];\n    this.instructions.push(moveToLineToInstruction);\n    this.hitDetectionInstructions.push(moveToLineToInstruction);\n    return end;\n  }\n\n  /**\n   * @param {import(\"../../geom/LineString.js\").default|import(\"../Feature.js\").default} lineStringGeometry Line string geometry.\n   * @param {import(\"../../Feature.js\").FeatureLike} feature Feature.\n   */\n  drawLineString(lineStringGeometry, feature) {\n    const state = this.state;\n    const strokeStyle = state.strokeStyle;\n    const lineWidth = state.lineWidth;\n    if (strokeStyle === undefined || lineWidth === undefined) {\n      return;\n    }\n    this.updateStrokeStyle(state, this.applyStroke);\n    this.beginGeometry(lineStringGeometry, feature);\n    this.hitDetectionInstructions.push(\n      [\n        CanvasInstruction.SET_STROKE_STYLE,\n        state.strokeStyle,\n        state.lineWidth,\n        state.lineCap,\n        state.lineJoin,\n        state.miterLimit,\n        defaultLineDash,\n        defaultLineDashOffset,\n      ],\n      beginPathInstruction\n    );\n    const flatCoordinates = lineStringGeometry.getFlatCoordinates();\n    const stride = lineStringGeometry.getStride();\n    this.drawFlatCoordinates_(\n      flatCoordinates,\n      0,\n      flatCoordinates.length,\n      stride\n    );\n    this.hitDetectionInstructions.push(strokeInstruction);\n    this.endGeometry(feature);\n  }\n\n  /**\n   * @param {import(\"../../geom/MultiLineString.js\").default|import(\"../Feature.js\").default} multiLineStringGeometry MultiLineString geometry.\n   * @param {import(\"../../Feature.js\").FeatureLike} feature Feature.\n   */\n  drawMultiLineString(multiLineStringGeometry, feature) {\n    const state = this.state;\n    const strokeStyle = state.strokeStyle;\n    const lineWidth = state.lineWidth;\n    if (strokeStyle === undefined || lineWidth === undefined) {\n      return;\n    }\n    this.updateStrokeStyle(state, this.applyStroke);\n    this.beginGeometry(multiLineStringGeometry, feature);\n    this.hitDetectionInstructions.push(\n      [\n        CanvasInstruction.SET_STROKE_STYLE,\n        state.strokeStyle,\n        state.lineWidth,\n        state.lineCap,\n        state.lineJoin,\n        state.miterLimit,\n        state.lineDash,\n        state.lineDashOffset,\n      ],\n      beginPathInstruction\n    );\n    const ends = multiLineStringGeometry.getEnds();\n    const flatCoordinates = multiLineStringGeometry.getFlatCoordinates();\n    const stride = multiLineStringGeometry.getStride();\n    let offset = 0;\n    for (let i = 0, ii = ends.length; i < ii; ++i) {\n      offset = this.drawFlatCoordinates_(\n        flatCoordinates,\n        offset,\n        /** @type {number} */ (ends[i]),\n        stride\n      );\n    }\n    this.hitDetectionInstructions.push(strokeInstruction);\n    this.endGeometry(feature);\n  }\n\n  /**\n   * @return {import(\"../canvas.js\").SerializableInstructions} the serializable instructions.\n   */\n  finish() {\n    const state = this.state;\n    if (\n      state.lastStroke != undefined &&\n      state.lastStroke != this.coordinates.length\n    ) {\n      this.instructions.push(strokeInstruction);\n    }\n    this.reverseHitDetectionInstructions();\n    this.state = null;\n    return super.finish();\n  }\n\n  /**\n   * @param {import(\"../canvas.js\").FillStrokeState} state State.\n   */\n  applyStroke(state) {\n    if (\n      state.lastStroke != undefined &&\n      state.lastStroke != this.coordinates.length\n    ) {\n      this.instructions.push(strokeInstruction);\n      state.lastStroke = this.coordinates.length;\n    }\n    state.lastStroke = 0;\n    super.applyStroke(state);\n    this.instructions.push(beginPathInstruction);\n  }\n}\n\nexport default CanvasLineStringBuilder;\n","/**\n * @module ol/render/canvas/PolygonBuilder\n */\nimport CanvasBuilder from './Builder.js';\nimport CanvasInstruction, {\n  beginPathInstruction,\n  closePathInstruction,\n  fillInstruction,\n  strokeInstruction,\n} from './Instruction.js';\nimport {defaultFillStyle} from '../canvas.js';\nimport {snap} from '../../geom/flat/simplify.js';\n\nclass CanvasPolygonBuilder extends CanvasBuilder {\n  /**\n   * @param {number} tolerance Tolerance.\n   * @param {import(\"../../extent.js\").Extent} maxExtent Maximum extent.\n   * @param {number} resolution Resolution.\n   * @param {number} pixelRatio Pixel ratio.\n   */\n  constructor(tolerance, maxExtent, resolution, pixelRatio) {\n    super(tolerance, maxExtent, resolution, pixelRatio);\n  }\n\n  /**\n   * @param {Array<number>} flatCoordinates Flat coordinates.\n   * @param {number} offset Offset.\n   * @param {Array<number>} ends Ends.\n   * @param {number} stride Stride.\n   * @private\n   * @return {number} End.\n   */\n  drawFlatCoordinatess_(flatCoordinates, offset, ends, stride) {\n    const state = this.state;\n    const fill = state.fillStyle !== undefined;\n    const stroke = state.strokeStyle !== undefined;\n    const numEnds = ends.length;\n    this.instructions.push(beginPathInstruction);\n    this.hitDetectionInstructions.push(beginPathInstruction);\n    for (let i = 0; i < numEnds; ++i) {\n      const end = ends[i];\n      const myBegin = this.coordinates.length;\n      const myEnd = this.appendFlatLineCoordinates(\n        flatCoordinates,\n        offset,\n        end,\n        stride,\n        true,\n        !stroke\n      );\n      const moveToLineToInstruction = [\n        CanvasInstruction.MOVE_TO_LINE_TO,\n        myBegin,\n        myEnd,\n      ];\n      this.instructions.push(moveToLineToInstruction);\n      this.hitDetectionInstructions.push(moveToLineToInstruction);\n      if (stroke) {\n        // Performance optimization: only call closePath() when we have a stroke.\n        // Otherwise the ring is closed already (see appendFlatLineCoordinates above).\n        this.instructions.push(closePathInstruction);\n        this.hitDetectionInstructions.push(closePathInstruction);\n      }\n      offset = end;\n    }\n    if (fill) {\n      this.instructions.push(fillInstruction);\n      this.hitDetectionInstructions.push(fillInstruction);\n    }\n    if (stroke) {\n      this.instructions.push(strokeInstruction);\n      this.hitDetectionInstructions.push(strokeInstruction);\n    }\n    return offset;\n  }\n\n  /**\n   * @param {import(\"../../geom/Circle.js\").default} circleGeometry Circle geometry.\n   * @param {import(\"../../Feature.js\").default} feature Feature.\n   */\n  drawCircle(circleGeometry, feature) {\n    const state = this.state;\n    const fillStyle = state.fillStyle;\n    const strokeStyle = state.strokeStyle;\n    if (fillStyle === undefined && strokeStyle === undefined) {\n      return;\n    }\n    this.setFillStrokeStyles_();\n    this.beginGeometry(circleGeometry, feature);\n    if (state.fillStyle !== undefined) {\n      this.hitDetectionInstructions.push([\n        CanvasInstruction.SET_FILL_STYLE,\n        defaultFillStyle,\n      ]);\n    }\n    if (state.strokeStyle !== undefined) {\n      this.hitDetectionInstructions.push([\n        CanvasInstruction.SET_STROKE_STYLE,\n        state.strokeStyle,\n        state.lineWidth,\n        state.lineCap,\n        state.lineJoin,\n        state.miterLimit,\n        state.lineDash,\n        state.lineDashOffset,\n      ]);\n    }\n    const flatCoordinates = circleGeometry.getFlatCoordinates();\n    const stride = circleGeometry.getStride();\n    const myBegin = this.coordinates.length;\n    this.appendFlatLineCoordinates(\n      flatCoordinates,\n      0,\n      flatCoordinates.length,\n      stride,\n      false,\n      false\n    );\n    const circleInstruction = [CanvasInstruction.CIRCLE, myBegin];\n    this.instructions.push(beginPathInstruction, circleInstruction);\n    this.hitDetectionInstructions.push(beginPathInstruction, circleInstruction);\n    if (state.fillStyle !== undefined) {\n      this.instructions.push(fillInstruction);\n      this.hitDetectionInstructions.push(fillInstruction);\n    }\n    if (state.strokeStyle !== undefined) {\n      this.instructions.push(strokeInstruction);\n      this.hitDetectionInstructions.push(strokeInstruction);\n    }\n    this.endGeometry(feature);\n  }\n\n  /**\n   * @param {import(\"../../geom/Polygon.js\").default|import(\"../Feature.js\").default} polygonGeometry Polygon geometry.\n   * @param {import(\"../../Feature.js\").FeatureLike} feature Feature.\n   */\n  drawPolygon(polygonGeometry, feature) {\n    const state = this.state;\n    const fillStyle = state.fillStyle;\n    const strokeStyle = state.strokeStyle;\n    if (fillStyle === undefined && strokeStyle === undefined) {\n      return;\n    }\n    this.setFillStrokeStyles_();\n    this.beginGeometry(polygonGeometry, feature);\n    if (state.fillStyle !== undefined) {\n      this.hitDetectionInstructions.push([\n        CanvasInstruction.SET_FILL_STYLE,\n        defaultFillStyle,\n      ]);\n    }\n    if (state.strokeStyle !== undefined) {\n      this.hitDetectionInstructions.push([\n        CanvasInstruction.SET_STROKE_STYLE,\n        state.strokeStyle,\n        state.lineWidth,\n        state.lineCap,\n        state.lineJoin,\n        state.miterLimit,\n        state.lineDash,\n        state.lineDashOffset,\n      ]);\n    }\n    const ends = polygonGeometry.getEnds();\n    const flatCoordinates = polygonGeometry.getOrientedFlatCoordinates();\n    const stride = polygonGeometry.getStride();\n    this.drawFlatCoordinatess_(\n      flatCoordinates,\n      0,\n      /** @type {Array<number>} */ (ends),\n      stride\n    );\n    this.endGeometry(feature);\n  }\n\n  /**\n   * @param {import(\"../../geom/MultiPolygon.js\").default} multiPolygonGeometry MultiPolygon geometry.\n   * @param {import(\"../../Feature.js\").FeatureLike} feature Feature.\n   */\n  drawMultiPolygon(multiPolygonGeometry, feature) {\n    const state = this.state;\n    const fillStyle = state.fillStyle;\n    const strokeStyle = state.strokeStyle;\n    if (fillStyle === undefined && strokeStyle === undefined) {\n      return;\n    }\n    this.setFillStrokeStyles_();\n    this.beginGeometry(multiPolygonGeometry, feature);\n    if (state.fillStyle !== undefined) {\n      this.hitDetectionInstructions.push([\n        CanvasInstruction.SET_FILL_STYLE,\n        defaultFillStyle,\n      ]);\n    }\n    if (state.strokeStyle !== undefined) {\n      this.hitDetectionInstructions.push([\n        CanvasInstruction.SET_STROKE_STYLE,\n        state.strokeStyle,\n        state.lineWidth,\n        state.lineCap,\n        state.lineJoin,\n        state.miterLimit,\n        state.lineDash,\n        state.lineDashOffset,\n      ]);\n    }\n    const endss = multiPolygonGeometry.getEndss();\n    const flatCoordinates = multiPolygonGeometry.getOrientedFlatCoordinates();\n    const stride = multiPolygonGeometry.getStride();\n    let offset = 0;\n    for (let i = 0, ii = endss.length; i < ii; ++i) {\n      offset = this.drawFlatCoordinatess_(\n        flatCoordinates,\n        offset,\n        endss[i],\n        stride\n      );\n    }\n    this.endGeometry(feature);\n  }\n\n  /**\n   * @return {import(\"../canvas.js\").SerializableInstructions} the serializable instructions.\n   */\n  finish() {\n    this.reverseHitDetectionInstructions();\n    this.state = null;\n    // We want to preserve topology when drawing polygons.  Polygons are\n    // simplified using quantization and point elimination. However, we might\n    // have received a mix of quantized and non-quantized geometries, so ensure\n    // that all are quantized by quantizing all coordinates in the batch.\n    const tolerance = this.tolerance;\n    if (tolerance !== 0) {\n      const coordinates = this.coordinates;\n      for (let i = 0, ii = coordinates.length; i < ii; ++i) {\n        coordinates[i] = snap(coordinates[i], tolerance);\n      }\n    }\n    return super.finish();\n  }\n\n  /**\n   * @private\n   */\n  setFillStrokeStyles_() {\n    const state = this.state;\n    const fillStyle = state.fillStyle;\n    if (fillStyle !== undefined) {\n      this.updateFillStyle(state, this.createFill);\n    }\n    if (state.strokeStyle !== undefined) {\n      this.updateStrokeStyle(state, this.applyStroke);\n    }\n  }\n}\n\nexport default CanvasPolygonBuilder;\n","import {lerp} from '../../math.js';\n\n/**\n * Creates chunks of equal length from a linestring\n * @param {number} chunkLength Length of each chunk.\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Start offset of the `flatCoordinates`.\n * @param {number} end End offset of the `flatCoordinates`.\n * @param {number} stride Stride.\n * @return {Array<Array<number>>} Chunks of linestrings with stride 2.\n */\nexport function lineChunk(chunkLength, flatCoordinates, offset, end, stride) {\n  const chunks = [];\n  let cursor = offset;\n  let chunkM = 0;\n  let currentChunk = flatCoordinates.slice(offset, 2);\n  while (chunkM < chunkLength && cursor + stride < end) {\n    const [x1, y1] = currentChunk.slice(-2);\n    const x2 = flatCoordinates[cursor + stride];\n    const y2 = flatCoordinates[cursor + stride + 1];\n    const segmentLength = Math.sqrt(\n      (x2 - x1) * (x2 - x1) + (y2 - y1) * (y2 - y1)\n    );\n    chunkM += segmentLength;\n    if (chunkM >= chunkLength) {\n      const m = (chunkLength - chunkM + segmentLength) / segmentLength;\n      const x = lerp(x1, x2, m);\n      const y = lerp(y1, y2, m);\n      currentChunk.push(x, y);\n      chunks.push(currentChunk);\n      currentChunk = [x, y];\n      if (chunkM == chunkLength) {\n        cursor += stride;\n      }\n      chunkM = 0;\n    } else if (chunkM < chunkLength) {\n      currentChunk.push(\n        flatCoordinates[cursor + stride],\n        flatCoordinates[cursor + stride + 1]\n      );\n      cursor += stride;\n    } else {\n      const missing = segmentLength - chunkM;\n      const x = lerp(x1, x2, missing / segmentLength);\n      const y = lerp(y1, y2, missing / segmentLength);\n      currentChunk.push(x, y);\n      chunks.push(currentChunk);\n      currentChunk = [x, y];\n      chunkM = 0;\n      cursor += stride;\n    }\n  }\n  if (chunkM > 0) {\n    chunks.push(currentChunk);\n  }\n  return chunks;\n}\n","/**\n * @module ol/geom/flat/straightchunk\n */\n\n/**\n * @param {number} maxAngle Maximum acceptable angle delta between segments.\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @return {Array<number>} Start and end of the first suitable chunk of the\n * given `flatCoordinates`.\n */\nexport function matchingChunk(maxAngle, flatCoordinates, offset, end, stride) {\n  let chunkStart = offset;\n  let chunkEnd = offset;\n  let chunkM = 0;\n  let m = 0;\n  let start = offset;\n  let acos, i, m12, m23, x1, y1, x12, y12, x23, y23;\n  for (i = offset; i < end; i += stride) {\n    const x2 = flatCoordinates[i];\n    const y2 = flatCoordinates[i + 1];\n    if (x1 !== undefined) {\n      x23 = x2 - x1;\n      y23 = y2 - y1;\n      m23 = Math.sqrt(x23 * x23 + y23 * y23);\n      if (x12 !== undefined) {\n        m += m12;\n        acos = Math.acos((x12 * x23 + y12 * y23) / (m12 * m23));\n        if (acos > maxAngle) {\n          if (m > chunkM) {\n            chunkM = m;\n            chunkStart = start;\n            chunkEnd = i;\n          }\n          m = 0;\n          start = i - stride;\n        }\n      }\n      m12 = m23;\n      x12 = x23;\n      y12 = y23;\n    }\n    x1 = x2;\n    y1 = y2;\n  }\n  m += m23;\n  return m > chunkM ? [start, i] : [chunkStart, chunkEnd];\n}\n","/**\n * @module ol/render/canvas/TextBuilder\n */\nimport CanvasBuilder from './Builder.js';\nimport CanvasInstruction from './Instruction.js';\nimport {asColorLike} from '../../colorlike.js';\nimport {\n  defaultFillStyle,\n  defaultFont,\n  defaultLineCap,\n  defaultLineDash,\n  defaultLineDashOffset,\n  defaultLineJoin,\n  defaultLineWidth,\n  defaultMiterLimit,\n  defaultPadding,\n  defaultStrokeStyle,\n  defaultTextAlign,\n  defaultTextBaseline,\n  registerFont,\n} from '../canvas.js';\nimport {getUid} from '../../util.js';\nimport {intersects} from '../../extent.js';\nimport {lineChunk} from '../../geom/flat/linechunk.js';\nimport {matchingChunk} from '../../geom/flat/straightchunk.js';\n/**\n * @const\n * @enum {number}\n */\nexport const TEXT_ALIGN = {\n  'left': 0,\n  'end': 0,\n  'center': 0.5,\n  'right': 1,\n  'start': 1,\n  'top': 0,\n  'middle': 0.5,\n  'hanging': 0.2,\n  'alphabetic': 0.8,\n  'ideographic': 0.8,\n  'bottom': 1,\n};\n\nclass CanvasTextBuilder extends CanvasBuilder {\n  /**\n   * @param {number} tolerance Tolerance.\n   * @param {import(\"../../extent.js\").Extent} maxExtent Maximum extent.\n   * @param {number} resolution Resolution.\n   * @param {number} pixelRatio Pixel ratio.\n   */\n  constructor(tolerance, maxExtent, resolution, pixelRatio) {\n    super(tolerance, maxExtent, resolution, pixelRatio);\n\n    /**\n     * @private\n     * @type {Array<HTMLCanvasElement>}\n     */\n    this.labels_ = null;\n\n    /**\n     * @private\n     * @type {string|Array<string>}\n     */\n    this.text_ = '';\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.textOffsetX_ = 0;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.textOffsetY_ = 0;\n\n    /**\n     * @private\n     * @type {boolean|undefined}\n     */\n    this.textRotateWithView_ = undefined;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.textRotation_ = 0;\n\n    /**\n     * @private\n     * @type {?import(\"../canvas.js\").FillState}\n     */\n    this.textFillState_ = null;\n\n    /**\n     * @type {!Object<string, import(\"../canvas.js\").FillState>}\n     */\n    this.fillStates = {};\n\n    /**\n     * @private\n     * @type {?import(\"../canvas.js\").StrokeState}\n     */\n    this.textStrokeState_ = null;\n\n    /**\n     * @type {!Object<string, import(\"../canvas.js\").StrokeState>}\n     */\n    this.strokeStates = {};\n\n    /**\n     * @private\n     * @type {import(\"../canvas.js\").TextState}\n     */\n    this.textState_ = /** @type {import(\"../canvas.js\").TextState} */ ({});\n\n    /**\n     * @type {!Object<string, import(\"../canvas.js\").TextState>}\n     */\n    this.textStates = {};\n\n    /**\n     * @private\n     * @type {string}\n     */\n    this.textKey_ = '';\n\n    /**\n     * @private\n     * @type {string}\n     */\n    this.fillKey_ = '';\n\n    /**\n     * @private\n     * @type {string}\n     */\n    this.strokeKey_ = '';\n\n    /**\n     * Data shared with an image builder for combined decluttering.\n     * @private\n     * @type {import(\"../canvas.js\").DeclutterImageWithText}\n     */\n    this.declutterImageWithText_ = undefined;\n  }\n\n  /**\n   * @return {import(\"../canvas.js\").SerializableInstructions} the serializable instructions.\n   */\n  finish() {\n    const instructions = super.finish();\n    instructions.textStates = this.textStates;\n    instructions.fillStates = this.fillStates;\n    instructions.strokeStates = this.strokeStates;\n    return instructions;\n  }\n\n  /**\n   * @param {import(\"../../geom/SimpleGeometry.js\").default|import(\"../Feature.js\").default} geometry Geometry.\n   * @param {import(\"../../Feature.js\").FeatureLike} feature Feature.\n   */\n  drawText(geometry, feature) {\n    const fillState = this.textFillState_;\n    const strokeState = this.textStrokeState_;\n    const textState = this.textState_;\n    if (this.text_ === '' || !textState || (!fillState && !strokeState)) {\n      return;\n    }\n\n    const coordinates = this.coordinates;\n    let begin = coordinates.length;\n\n    const geometryType = geometry.getType();\n    let flatCoordinates = null;\n    let stride = geometry.getStride();\n\n    if (\n      textState.placement === 'line' &&\n      (geometryType == 'LineString' ||\n        geometryType == 'MultiLineString' ||\n        geometryType == 'Polygon' ||\n        geometryType == 'MultiPolygon')\n    ) {\n      if (!intersects(this.getBufferedMaxExtent(), geometry.getExtent())) {\n        return;\n      }\n      let ends;\n      flatCoordinates = geometry.getFlatCoordinates();\n      if (geometryType == 'LineString') {\n        ends = [flatCoordinates.length];\n      } else if (geometryType == 'MultiLineString') {\n        ends = /** @type {import(\"../../geom/MultiLineString.js\").default} */ (\n          geometry\n        ).getEnds();\n      } else if (geometryType == 'Polygon') {\n        ends = /** @type {import(\"../../geom/Polygon.js\").default} */ (geometry)\n          .getEnds()\n          .slice(0, 1);\n      } else if (geometryType == 'MultiPolygon') {\n        const endss =\n          /** @type {import(\"../../geom/MultiPolygon.js\").default} */ (\n            geometry\n          ).getEndss();\n        ends = [];\n        for (let i = 0, ii = endss.length; i < ii; ++i) {\n          ends.push(endss[i][0]);\n        }\n      }\n      this.beginGeometry(geometry, feature);\n      const repeat = textState.repeat;\n      const textAlign = repeat ? undefined : textState.textAlign;\n      // No `justify` support for line placement.\n      let flatOffset = 0;\n      for (let o = 0, oo = ends.length; o < oo; ++o) {\n        let chunks;\n        if (repeat) {\n          chunks = lineChunk(\n            repeat * this.resolution,\n            flatCoordinates,\n            flatOffset,\n            ends[o],\n            stride\n          );\n        } else {\n          chunks = [flatCoordinates.slice(flatOffset, ends[o])];\n        }\n        for (let c = 0, cc = chunks.length; c < cc; ++c) {\n          const chunk = chunks[c];\n          let chunkBegin = 0;\n          let chunkEnd = chunk.length;\n          if (textAlign == undefined) {\n            const range = matchingChunk(\n              textState.maxAngle,\n              chunk,\n              0,\n              chunk.length,\n              2\n            );\n            chunkBegin = range[0];\n            chunkEnd = range[1];\n          }\n          for (let i = chunkBegin; i < chunkEnd; i += stride) {\n            coordinates.push(chunk[i], chunk[i + 1]);\n          }\n          const end = coordinates.length;\n          flatOffset = ends[o];\n          this.drawChars_(begin, end);\n          begin = end;\n        }\n      }\n      this.endGeometry(feature);\n    } else {\n      let geometryWidths = textState.overflow ? null : [];\n      switch (geometryType) {\n        case 'Point':\n        case 'MultiPoint':\n          flatCoordinates =\n            /** @type {import(\"../../geom/MultiPoint.js\").default} */ (\n              geometry\n            ).getFlatCoordinates();\n          break;\n        case 'LineString':\n          flatCoordinates =\n            /** @type {import(\"../../geom/LineString.js\").default} */ (\n              geometry\n            ).getFlatMidpoint();\n          break;\n        case 'Circle':\n          flatCoordinates =\n            /** @type {import(\"../../geom/Circle.js\").default} */ (\n              geometry\n            ).getCenter();\n          break;\n        case 'MultiLineString':\n          flatCoordinates =\n            /** @type {import(\"../../geom/MultiLineString.js\").default} */ (\n              geometry\n            ).getFlatMidpoints();\n          stride = 2;\n          break;\n        case 'Polygon':\n          flatCoordinates =\n            /** @type {import(\"../../geom/Polygon.js\").default} */ (\n              geometry\n            ).getFlatInteriorPoint();\n          if (!textState.overflow) {\n            geometryWidths.push(flatCoordinates[2] / this.resolution);\n          }\n          stride = 3;\n          break;\n        case 'MultiPolygon':\n          const interiorPoints =\n            /** @type {import(\"../../geom/MultiPolygon.js\").default} */ (\n              geometry\n            ).getFlatInteriorPoints();\n          flatCoordinates = [];\n          for (let i = 0, ii = interiorPoints.length; i < ii; i += 3) {\n            if (!textState.overflow) {\n              geometryWidths.push(interiorPoints[i + 2] / this.resolution);\n            }\n            flatCoordinates.push(interiorPoints[i], interiorPoints[i + 1]);\n          }\n          if (flatCoordinates.length === 0) {\n            return;\n          }\n          stride = 2;\n          break;\n        default:\n      }\n      const end = this.appendFlatPointCoordinates(flatCoordinates, stride);\n      if (end === begin) {\n        return;\n      }\n      if (\n        geometryWidths &&\n        (end - begin) / 2 !== flatCoordinates.length / stride\n      ) {\n        let beg = begin / 2;\n        geometryWidths = geometryWidths.filter((w, i) => {\n          const keep =\n            coordinates[(beg + i) * 2] === flatCoordinates[i * stride] &&\n            coordinates[(beg + i) * 2 + 1] === flatCoordinates[i * stride + 1];\n          if (!keep) {\n            --beg;\n          }\n          return keep;\n        });\n      }\n\n      this.saveTextStates_();\n\n      if (textState.backgroundFill || textState.backgroundStroke) {\n        this.setFillStrokeStyle(\n          textState.backgroundFill,\n          textState.backgroundStroke\n        );\n        if (textState.backgroundFill) {\n          this.updateFillStyle(this.state, this.createFill);\n          this.hitDetectionInstructions.push(this.createFill(this.state));\n        }\n        if (textState.backgroundStroke) {\n          this.updateStrokeStyle(this.state, this.applyStroke);\n          this.hitDetectionInstructions.push(this.createStroke(this.state));\n        }\n      }\n\n      this.beginGeometry(geometry, feature);\n\n      // adjust padding for negative scale\n      let padding = textState.padding;\n      if (\n        padding != defaultPadding &&\n        (textState.scale[0] < 0 || textState.scale[1] < 0)\n      ) {\n        let p0 = textState.padding[0];\n        let p1 = textState.padding[1];\n        let p2 = textState.padding[2];\n        let p3 = textState.padding[3];\n        if (textState.scale[0] < 0) {\n          p1 = -p1;\n          p3 = -p3;\n        }\n        if (textState.scale[1] < 0) {\n          p0 = -p0;\n          p2 = -p2;\n        }\n        padding = [p0, p1, p2, p3];\n      }\n\n      // The image is unknown at this stage so we pass null; it will be computed at render time.\n      // For clarity, we pass NaN for offsetX, offsetY, width and height, which will be computed at\n      // render time.\n      const pixelRatio = this.pixelRatio;\n      this.instructions.push([\n        CanvasInstruction.DRAW_IMAGE,\n        begin,\n        end,\n        null,\n        NaN,\n        NaN,\n        NaN,\n        1,\n        0,\n        0,\n        this.textRotateWithView_,\n        this.textRotation_,\n        [1, 1],\n        NaN,\n        undefined,\n        this.declutterImageWithText_,\n        padding == defaultPadding\n          ? defaultPadding\n          : padding.map(function (p) {\n              return p * pixelRatio;\n            }),\n        !!textState.backgroundFill,\n        !!textState.backgroundStroke,\n        this.text_,\n        this.textKey_,\n        this.strokeKey_,\n        this.fillKey_,\n        this.textOffsetX_,\n        this.textOffsetY_,\n        geometryWidths,\n      ]);\n      const scale = 1 / pixelRatio;\n      this.hitDetectionInstructions.push([\n        CanvasInstruction.DRAW_IMAGE,\n        begin,\n        end,\n        null,\n        NaN,\n        NaN,\n        NaN,\n        1,\n        0,\n        0,\n        this.textRotateWithView_,\n        this.textRotation_,\n        [scale, scale],\n        NaN,\n        undefined,\n        this.declutterImageWithText_,\n        padding,\n        !!textState.backgroundFill,\n        !!textState.backgroundStroke,\n        this.text_,\n        this.textKey_,\n        this.strokeKey_,\n        this.fillKey_,\n        this.textOffsetX_,\n        this.textOffsetY_,\n        geometryWidths,\n      ]);\n\n      this.endGeometry(feature);\n    }\n  }\n\n  /**\n   * @private\n   */\n  saveTextStates_() {\n    const strokeState = this.textStrokeState_;\n    const textState = this.textState_;\n    const fillState = this.textFillState_;\n\n    const strokeKey = this.strokeKey_;\n    if (strokeState) {\n      if (!(strokeKey in this.strokeStates)) {\n        this.strokeStates[strokeKey] = {\n          strokeStyle: strokeState.strokeStyle,\n          lineCap: strokeState.lineCap,\n          lineDashOffset: strokeState.lineDashOffset,\n          lineWidth: strokeState.lineWidth,\n          lineJoin: strokeState.lineJoin,\n          miterLimit: strokeState.miterLimit,\n          lineDash: strokeState.lineDash,\n        };\n      }\n    }\n    const textKey = this.textKey_;\n    if (!(textKey in this.textStates)) {\n      this.textStates[textKey] = {\n        font: textState.font,\n        textAlign: textState.textAlign || defaultTextAlign,\n        justify: textState.justify,\n        textBaseline: textState.textBaseline || defaultTextBaseline,\n        scale: textState.scale,\n      };\n    }\n    const fillKey = this.fillKey_;\n    if (fillState) {\n      if (!(fillKey in this.fillStates)) {\n        this.fillStates[fillKey] = {\n          fillStyle: fillState.fillStyle,\n        };\n      }\n    }\n  }\n\n  /**\n   * @private\n   * @param {number} begin Begin.\n   * @param {number} end End.\n   */\n  drawChars_(begin, end) {\n    const strokeState = this.textStrokeState_;\n    const textState = this.textState_;\n\n    const strokeKey = this.strokeKey_;\n    const textKey = this.textKey_;\n    const fillKey = this.fillKey_;\n    this.saveTextStates_();\n\n    const pixelRatio = this.pixelRatio;\n    const baseline = TEXT_ALIGN[textState.textBaseline];\n\n    const offsetY = this.textOffsetY_ * pixelRatio;\n    const text = this.text_;\n    const strokeWidth = strokeState\n      ? (strokeState.lineWidth * Math.abs(textState.scale[0])) / 2\n      : 0;\n\n    this.instructions.push([\n      CanvasInstruction.DRAW_CHARS,\n      begin,\n      end,\n      baseline,\n      textState.overflow,\n      fillKey,\n      textState.maxAngle,\n      pixelRatio,\n      offsetY,\n      strokeKey,\n      strokeWidth * pixelRatio,\n      text,\n      textKey,\n      1,\n    ]);\n    this.hitDetectionInstructions.push([\n      CanvasInstruction.DRAW_CHARS,\n      begin,\n      end,\n      baseline,\n      textState.overflow,\n      fillKey,\n      textState.maxAngle,\n      1,\n      offsetY,\n      strokeKey,\n      strokeWidth,\n      text,\n      textKey,\n      1 / pixelRatio,\n    ]);\n  }\n\n  /**\n   * @param {import(\"../../style/Text.js\").default} textStyle Text style.\n   * @param {Object} [sharedData] Shared data.\n   */\n  setTextStyle(textStyle, sharedData) {\n    let textState, fillState, strokeState;\n    if (!textStyle) {\n      this.text_ = '';\n    } else {\n      const textFillStyle = textStyle.getFill();\n      if (!textFillStyle) {\n        fillState = null;\n        this.textFillState_ = fillState;\n      } else {\n        fillState = this.textFillState_;\n        if (!fillState) {\n          fillState = /** @type {import(\"../canvas.js\").FillState} */ ({});\n          this.textFillState_ = fillState;\n        }\n        fillState.fillStyle = asColorLike(\n          textFillStyle.getColor() || defaultFillStyle\n        );\n      }\n\n      const textStrokeStyle = textStyle.getStroke();\n      if (!textStrokeStyle) {\n        strokeState = null;\n        this.textStrokeState_ = strokeState;\n      } else {\n        strokeState = this.textStrokeState_;\n        if (!strokeState) {\n          strokeState = /** @type {import(\"../canvas.js\").StrokeState} */ ({});\n          this.textStrokeState_ = strokeState;\n        }\n        const lineDash = textStrokeStyle.getLineDash();\n        const lineDashOffset = textStrokeStyle.getLineDashOffset();\n        const lineWidth = textStrokeStyle.getWidth();\n        const miterLimit = textStrokeStyle.getMiterLimit();\n        strokeState.lineCap = textStrokeStyle.getLineCap() || defaultLineCap;\n        strokeState.lineDash = lineDash ? lineDash.slice() : defaultLineDash;\n        strokeState.lineDashOffset =\n          lineDashOffset === undefined ? defaultLineDashOffset : lineDashOffset;\n        strokeState.lineJoin = textStrokeStyle.getLineJoin() || defaultLineJoin;\n        strokeState.lineWidth =\n          lineWidth === undefined ? defaultLineWidth : lineWidth;\n        strokeState.miterLimit =\n          miterLimit === undefined ? defaultMiterLimit : miterLimit;\n        strokeState.strokeStyle = asColorLike(\n          textStrokeStyle.getColor() || defaultStrokeStyle\n        );\n      }\n\n      textState = this.textState_;\n      const font = textStyle.getFont() || defaultFont;\n      registerFont(font);\n      const textScale = textStyle.getScaleArray();\n      textState.overflow = textStyle.getOverflow();\n      textState.font = font;\n      textState.maxAngle = textStyle.getMaxAngle();\n      textState.placement = textStyle.getPlacement();\n      textState.textAlign = textStyle.getTextAlign();\n      textState.repeat = textStyle.getRepeat();\n      textState.justify = textStyle.getJustify();\n      textState.textBaseline =\n        textStyle.getTextBaseline() || defaultTextBaseline;\n      textState.backgroundFill = textStyle.getBackgroundFill();\n      textState.backgroundStroke = textStyle.getBackgroundStroke();\n      textState.padding = textStyle.getPadding() || defaultPadding;\n      textState.scale = textScale === undefined ? [1, 1] : textScale;\n\n      const textOffsetX = textStyle.getOffsetX();\n      const textOffsetY = textStyle.getOffsetY();\n      const textRotateWithView = textStyle.getRotateWithView();\n      const textRotation = textStyle.getRotation();\n      this.text_ = textStyle.getText() || '';\n      this.textOffsetX_ = textOffsetX === undefined ? 0 : textOffsetX;\n      this.textOffsetY_ = textOffsetY === undefined ? 0 : textOffsetY;\n      this.textRotateWithView_ =\n        textRotateWithView === undefined ? false : textRotateWithView;\n      this.textRotation_ = textRotation === undefined ? 0 : textRotation;\n\n      this.strokeKey_ = strokeState\n        ? (typeof strokeState.strokeStyle == 'string'\n            ? strokeState.strokeStyle\n            : getUid(strokeState.strokeStyle)) +\n          strokeState.lineCap +\n          strokeState.lineDashOffset +\n          '|' +\n          strokeState.lineWidth +\n          strokeState.lineJoin +\n          strokeState.miterLimit +\n          '[' +\n          strokeState.lineDash.join() +\n          ']'\n        : '';\n      this.textKey_ =\n        textState.font +\n        textState.scale +\n        (textState.textAlign || '?') +\n        (textState.repeat || '?') +\n        (textState.justify || '?') +\n        (textState.textBaseline || '?');\n      this.fillKey_ = fillState\n        ? typeof fillState.fillStyle == 'string'\n          ? fillState.fillStyle\n          : '|' + getUid(fillState.fillStyle)\n        : '';\n    }\n    this.declutterImageWithText_ = sharedData;\n  }\n}\n\nexport default CanvasTextBuilder;\n","/**\n * @module ol/render/canvas/BuilderGroup\n */\n\nimport Builder from './Builder.js';\nimport ImageBuilder from './ImageBuilder.js';\nimport LineStringBuilder from './LineStringBuilder.js';\nimport PolygonBuilder from './PolygonBuilder.js';\nimport TextBuilder from './TextBuilder.js';\n\n/**\n * @type {Object<import(\"../canvas.js\").BuilderType, typeof Builder>}\n */\nconst BATCH_CONSTRUCTORS = {\n  'Circle': PolygonBuilder,\n  'Default': Builder,\n  'Image': ImageBuilder,\n  'LineString': LineStringBuilder,\n  'Polygon': PolygonBuilder,\n  'Text': TextBuilder,\n};\n\nclass BuilderGroup {\n  /**\n   * @param {number} tolerance Tolerance.\n   * @param {import(\"../../extent.js\").Extent} maxExtent Max extent.\n   * @param {number} resolution Resolution.\n   * @param {number} pixelRatio Pixel ratio.\n   */\n  constructor(tolerance, maxExtent, resolution, pixelRatio) {\n    /**\n     * @private\n     * @type {number}\n     */\n    this.tolerance_ = tolerance;\n\n    /**\n     * @private\n     * @type {import(\"../../extent.js\").Extent}\n     */\n    this.maxExtent_ = maxExtent;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.pixelRatio_ = pixelRatio;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.resolution_ = resolution;\n\n    /**\n     * @private\n     * @type {!Object<string, !Object<import(\"../canvas.js\").BuilderType, Builder>>}\n     */\n    this.buildersByZIndex_ = {};\n  }\n\n  /**\n   * @return {!Object<string, !Object<import(\"../canvas.js\").BuilderType, import(\"./Builder.js\").SerializableInstructions>>} The serializable instructions\n   */\n  finish() {\n    const builderInstructions = {};\n    for (const zKey in this.buildersByZIndex_) {\n      builderInstructions[zKey] = builderInstructions[zKey] || {};\n      const builders = this.buildersByZIndex_[zKey];\n      for (const builderKey in builders) {\n        const builderInstruction = builders[builderKey].finish();\n        builderInstructions[zKey][builderKey] = builderInstruction;\n      }\n    }\n    return builderInstructions;\n  }\n\n  /**\n   * @param {number|undefined} zIndex Z index.\n   * @param {import(\"../canvas.js\").BuilderType} builderType Replay type.\n   * @return {import(\"../VectorContext.js\").default} Replay.\n   */\n  getBuilder(zIndex, builderType) {\n    const zIndexKey = zIndex !== undefined ? zIndex.toString() : '0';\n    let replays = this.buildersByZIndex_[zIndexKey];\n    if (replays === undefined) {\n      replays = {};\n      this.buildersByZIndex_[zIndexKey] = replays;\n    }\n    let replay = replays[builderType];\n    if (replay === undefined) {\n      const Constructor = BATCH_CONSTRUCTORS[builderType];\n      replay = new Constructor(\n        this.tolerance_,\n        this.maxExtent_,\n        this.resolution_,\n        this.pixelRatio_\n      );\n      replays[builderType] = replay;\n    }\n    return replay;\n  }\n}\n\nexport default BuilderGroup;\n","/**\n * @module ol/geom/flat/textpath\n */\nimport {lerp} from '../../math.js';\nimport {rotate} from './transform.js';\n\n/**\n * @param {Array<number>} flatCoordinates Path to put text on.\n * @param {number} offset Start offset of the `flatCoordinates`.\n * @param {number} end End offset of the `flatCoordinates`.\n * @param {number} stride Stride.\n * @param {string} text Text to place on the path.\n * @param {number} startM m along the path where the text starts.\n * @param {number} maxAngle Max angle between adjacent chars in radians.\n * @param {number} scale The product of the text scale and the device pixel ratio.\n * @param {function(string, string, Object<string, number>):number} measureAndCacheTextWidth Measure and cache text width.\n * @param {string} font The font.\n * @param {Object<string, number>} cache A cache of measured widths.\n * @param {number} rotation Rotation to apply to the flatCoordinates to determine whether text needs to be reversed.\n * @return {Array<Array<*>>|null} The result array (or null if `maxAngle` was\n * exceeded). Entries of the array are x, y, anchorX, angle, chunk.\n */\nexport function drawTextOnPath(\n  flatCoordinates,\n  offset,\n  end,\n  stride,\n  text,\n  startM,\n  maxAngle,\n  scale,\n  measureAndCacheTextWidth,\n  font,\n  cache,\n  rotation\n) {\n  let x2 = flatCoordinates[offset];\n  let y2 = flatCoordinates[offset + 1];\n  let x1 = 0;\n  let y1 = 0;\n  let segmentLength = 0;\n  let segmentM = 0;\n\n  function advance() {\n    x1 = x2;\n    y1 = y2;\n    offset += stride;\n    x2 = flatCoordinates[offset];\n    y2 = flatCoordinates[offset + 1];\n    segmentM += segmentLength;\n    segmentLength = Math.sqrt((x2 - x1) * (x2 - x1) + (y2 - y1) * (y2 - y1));\n  }\n  do {\n    advance();\n  } while (offset < end - stride && segmentM + segmentLength < startM);\n\n  let interpolate =\n    segmentLength === 0 ? 0 : (startM - segmentM) / segmentLength;\n  const beginX = lerp(x1, x2, interpolate);\n  const beginY = lerp(y1, y2, interpolate);\n\n  const startOffset = offset - stride;\n  const startLength = segmentM;\n  const endM = startM + scale * measureAndCacheTextWidth(font, text, cache);\n  while (offset < end - stride && segmentM + segmentLength < endM) {\n    advance();\n  }\n  interpolate = segmentLength === 0 ? 0 : (endM - segmentM) / segmentLength;\n  const endX = lerp(x1, x2, interpolate);\n  const endY = lerp(y1, y2, interpolate);\n\n  // Keep text upright\n  let reverse;\n  if (rotation) {\n    const flat = [beginX, beginY, endX, endY];\n    rotate(flat, 0, 4, 2, rotation, flat, flat);\n    reverse = flat[0] > flat[2];\n  } else {\n    reverse = beginX > endX;\n  }\n\n  const PI = Math.PI;\n  const result = [];\n  const singleSegment = startOffset + stride === offset;\n\n  offset = startOffset;\n  segmentLength = 0;\n  segmentM = startLength;\n  x2 = flatCoordinates[offset];\n  y2 = flatCoordinates[offset + 1];\n\n  let previousAngle;\n  // All on the same segment\n  if (singleSegment) {\n    advance();\n\n    previousAngle = Math.atan2(y2 - y1, x2 - x1);\n    if (reverse) {\n      previousAngle += previousAngle > 0 ? -PI : PI;\n    }\n    const x = (endX + beginX) / 2;\n    const y = (endY + beginY) / 2;\n    result[0] = [x, y, (endM - startM) / 2, previousAngle, text];\n    return result;\n  }\n\n  // rendering across line segments\n  text = text.replace(/\\n/g, ' '); // ensure rendering in single-line as all calculations below don't handle multi-lines\n\n  for (let i = 0, ii = text.length; i < ii; ) {\n    advance();\n    let angle = Math.atan2(y2 - y1, x2 - x1);\n    if (reverse) {\n      angle += angle > 0 ? -PI : PI;\n    }\n    if (previousAngle !== undefined) {\n      let delta = angle - previousAngle;\n      delta += delta > PI ? -2 * PI : delta < -PI ? 2 * PI : 0;\n      if (Math.abs(delta) > maxAngle) {\n        return null;\n      }\n    }\n    previousAngle = angle;\n\n    const iStart = i;\n    let charLength = 0;\n    for (; i < ii; ++i) {\n      const index = reverse ? ii - i - 1 : i;\n      const len = scale * measureAndCacheTextWidth(font, text[index], cache);\n      if (\n        offset + stride < end &&\n        segmentM + segmentLength < startM + charLength + len / 2\n      ) {\n        break;\n      }\n      charLength += len;\n    }\n    if (i === iStart) {\n      continue;\n    }\n    const chars = reverse\n      ? text.substring(ii - iStart, ii - i)\n      : text.substring(iStart, i);\n    interpolate =\n      segmentLength === 0\n        ? 0\n        : (startM + charLength / 2 - segmentM) / segmentLength;\n    const x = lerp(x1, x2, interpolate);\n    const y = lerp(y1, y2, interpolate);\n    result.push([x, y, charLength / 2, angle, chars]);\n    startM += charLength;\n  }\n  return result;\n}\n","/**\n * @module ol/geom/flat/length\n */\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @return {number} Length.\n */\nexport function lineStringLength(flatCoordinates, offset, end, stride) {\n  let x1 = flatCoordinates[offset];\n  let y1 = flatCoordinates[offset + 1];\n  let length = 0;\n  for (let i = offset + stride; i < end; i += stride) {\n    const x2 = flatCoordinates[i];\n    const y2 = flatCoordinates[i + 1];\n    length += Math.sqrt((x2 - x1) * (x2 - x1) + (y2 - y1) * (y2 - y1));\n    x1 = x2;\n    y1 = y2;\n  }\n  return length;\n}\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @return {number} Perimeter.\n */\nexport function linearRingLength(flatCoordinates, offset, end, stride) {\n  let perimeter = lineStringLength(flatCoordinates, offset, end, stride);\n  const dx = flatCoordinates[end - stride] - flatCoordinates[offset];\n  const dy = flatCoordinates[end - stride + 1] - flatCoordinates[offset + 1];\n  perimeter += Math.sqrt(dx * dx + dy * dy);\n  return perimeter;\n}\n","/**\n * @module ol/render/canvas/Executor\n */\nimport CanvasInstruction from './Instruction.js';\nimport {TEXT_ALIGN} from './TextBuilder.js';\nimport {\n  apply as applyTransform,\n  compose as composeTransform,\n  create as createTransform,\n  setFromArray as transformSetFromArray,\n} from '../../transform.js';\nimport {createEmpty, createOrUpdate, intersects} from '../../extent.js';\nimport {\n  defaultPadding,\n  defaultTextAlign,\n  defaultTextBaseline,\n  drawImageOrLabel,\n  getTextDimensions,\n  measureAndCacheTextWidth,\n} from '../canvas.js';\nimport {drawTextOnPath} from '../../geom/flat/textpath.js';\nimport {equals} from '../../array.js';\nimport {lineStringLength} from '../../geom/flat/length.js';\nimport {transform2D} from '../../geom/flat/transform.js';\n\n/**\n * @typedef {Object} BBox\n * @property {number} minX Minimal x.\n * @property {number} minY Minimal y.\n * @property {number} maxX Maximal x.\n * @property {number} maxY Maximal y\n * @property {*} value Value.\n */\n\n/**\n * @typedef {Object} ImageOrLabelDimensions\n * @property {number} drawImageX DrawImageX.\n * @property {number} drawImageY DrawImageY.\n * @property {number} drawImageW DrawImageW.\n * @property {number} drawImageH DrawImageH.\n * @property {number} originX OriginX.\n * @property {number} originY OriginY.\n * @property {Array<number>} scale Scale.\n * @property {BBox} declutterBox DeclutterBox.\n * @property {import(\"../../transform.js\").Transform} canvasTransform CanvasTransform.\n */\n\n/**\n * @typedef {{0: CanvasRenderingContext2D, 1: number, 2: import(\"../canvas.js\").Label|HTMLImageElement|HTMLCanvasElement|HTMLVideoElement, 3: ImageOrLabelDimensions, 4: number, 5: Array<*>, 6: Array<*>}} ReplayImageOrLabelArgs\n */\n\n/**\n * @template T\n * @typedef {function(import(\"../../Feature.js\").FeatureLike, import(\"../../geom/SimpleGeometry.js\").default): T} FeatureCallback\n */\n\n/**\n * @type {import(\"../../extent.js\").Extent}\n */\nconst tmpExtent = createEmpty();\n\n/** @type {import(\"../../coordinate.js\").Coordinate} */\nconst p1 = [];\n/** @type {import(\"../../coordinate.js\").Coordinate} */\nconst p2 = [];\n/** @type {import(\"../../coordinate.js\").Coordinate} */\nconst p3 = [];\n/** @type {import(\"../../coordinate.js\").Coordinate} */\nconst p4 = [];\n\n/**\n * @param {ReplayImageOrLabelArgs} replayImageOrLabelArgs Arguments to replayImageOrLabel\n * @return {BBox} Declutter bbox.\n */\nfunction getDeclutterBox(replayImageOrLabelArgs) {\n  return replayImageOrLabelArgs[3].declutterBox;\n}\n\nconst rtlRegEx = new RegExp(\n  /* eslint-disable prettier/prettier */\n  '[' +\n    String.fromCharCode(0x00591) + '-' + String.fromCharCode(0x008ff) +\n    String.fromCharCode(0x0fb1d) + '-' + String.fromCharCode(0x0fdff) +\n    String.fromCharCode(0x0fe70) + '-' + String.fromCharCode(0x0fefc) +\n    String.fromCharCode(0x10800) + '-' + String.fromCharCode(0x10fff) +\n    String.fromCharCode(0x1e800) + '-' + String.fromCharCode(0x1efff) +\n  ']'\n  /* eslint-enable prettier/prettier */\n);\n\n/**\n * @param {string} text Text.\n * @param {CanvasTextAlign} align Alignment.\n * @return {number} Text alignment.\n */\nfunction horizontalTextAlign(text, align) {\n  if ((align === 'start' || align === 'end') && !rtlRegEx.test(text)) {\n    align = align === 'start' ? 'left' : 'right';\n  }\n  return TEXT_ALIGN[align];\n}\n\n/**\n * @param {Array<string>} acc Accumulator.\n * @param {string} line Line of text.\n * @param {number} i Index\n * @return {Array<string>} Accumulator.\n */\nfunction createTextChunks(acc, line, i) {\n  if (i > 0) {\n    acc.push('\\n', '');\n  }\n  acc.push(line, '');\n  return acc;\n}\n\nclass Executor {\n  /**\n   * @param {number} resolution Resolution.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {boolean} overlaps The replay can have overlapping geometries.\n   * @param {import(\"../canvas.js\").SerializableInstructions} instructions The serializable instructions\n   */\n  constructor(resolution, pixelRatio, overlaps, instructions) {\n    /**\n     * @protected\n     * @type {boolean}\n     */\n    this.overlaps = overlaps;\n\n    /**\n     * @protected\n     * @type {number}\n     */\n    this.pixelRatio = pixelRatio;\n\n    /**\n     * @protected\n     * @const\n     * @type {number}\n     */\n    this.resolution = resolution;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.alignFill_;\n\n    /**\n     * @protected\n     * @type {Array<*>}\n     */\n    this.instructions = instructions.instructions;\n\n    /**\n     * @protected\n     * @type {Array<number>}\n     */\n    this.coordinates = instructions.coordinates;\n\n    /**\n     * @private\n     * @type {!Object<number,import(\"../../coordinate.js\").Coordinate|Array<import(\"../../coordinate.js\").Coordinate>|Array<Array<import(\"../../coordinate.js\").Coordinate>>>}\n     */\n    this.coordinateCache_ = {};\n\n    /**\n     * @private\n     * @type {!import(\"../../transform.js\").Transform}\n     */\n    this.renderedTransform_ = createTransform();\n\n    /**\n     * @protected\n     * @type {Array<*>}\n     */\n    this.hitDetectionInstructions = instructions.hitDetectionInstructions;\n\n    /**\n     * @private\n     * @type {Array<number>}\n     */\n    this.pixelCoordinates_ = null;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.viewRotation_ = 0;\n\n    /**\n     * @type {!Object<string, import(\"../canvas.js\").FillState>}\n     */\n    this.fillStates = instructions.fillStates || {};\n\n    /**\n     * @type {!Object<string, import(\"../canvas.js\").StrokeState>}\n     */\n    this.strokeStates = instructions.strokeStates || {};\n\n    /**\n     * @type {!Object<string, import(\"../canvas.js\").TextState>}\n     */\n    this.textStates = instructions.textStates || {};\n\n    /**\n     * @private\n     * @type {Object<string, Object<string, number>>}\n     */\n    this.widths_ = {};\n\n    /**\n     * @private\n     * @type {Object<string, import(\"../canvas.js\").Label>}\n     */\n    this.labels_ = {};\n  }\n\n  /**\n   * @param {string|Array<string>} text Text.\n   * @param {string} textKey Text style key.\n   * @param {string} fillKey Fill style key.\n   * @param {string} strokeKey Stroke style key.\n   * @return {import(\"../canvas.js\").Label} Label.\n   */\n  createLabel(text, textKey, fillKey, strokeKey) {\n    const key = text + textKey + fillKey + strokeKey;\n    if (this.labels_[key]) {\n      return this.labels_[key];\n    }\n    const strokeState = strokeKey ? this.strokeStates[strokeKey] : null;\n    const fillState = fillKey ? this.fillStates[fillKey] : null;\n    const textState = this.textStates[textKey];\n    const pixelRatio = this.pixelRatio;\n    const scale = [\n      textState.scale[0] * pixelRatio,\n      textState.scale[1] * pixelRatio,\n    ];\n    const textIsArray = Array.isArray(text);\n    const align = textState.justify\n      ? TEXT_ALIGN[textState.justify]\n      : horizontalTextAlign(\n          Array.isArray(text) ? text[0] : text,\n          textState.textAlign || defaultTextAlign\n        );\n    const strokeWidth =\n      strokeKey && strokeState.lineWidth ? strokeState.lineWidth : 0;\n\n    const chunks = textIsArray\n      ? text\n      : text.split('\\n').reduce(createTextChunks, []);\n\n    const {width, height, widths, heights, lineWidths} = getTextDimensions(\n      textState,\n      chunks\n    );\n    const renderWidth = width + strokeWidth;\n    const contextInstructions = [];\n    // make canvas 2 pixels wider to account for italic text width measurement errors\n    const w = (renderWidth + 2) * scale[0];\n    const h = (height + strokeWidth) * scale[1];\n    /** @type {import(\"../canvas.js\").Label} */\n    const label = {\n      width: w < 0 ? Math.floor(w) : Math.ceil(w),\n      height: h < 0 ? Math.floor(h) : Math.ceil(h),\n      contextInstructions: contextInstructions,\n    };\n    if (scale[0] != 1 || scale[1] != 1) {\n      contextInstructions.push('scale', scale);\n    }\n    if (strokeKey) {\n      contextInstructions.push('strokeStyle', strokeState.strokeStyle);\n      contextInstructions.push('lineWidth', strokeWidth);\n      contextInstructions.push('lineCap', strokeState.lineCap);\n      contextInstructions.push('lineJoin', strokeState.lineJoin);\n      contextInstructions.push('miterLimit', strokeState.miterLimit);\n      contextInstructions.push('setLineDash', [strokeState.lineDash]);\n      contextInstructions.push('lineDashOffset', strokeState.lineDashOffset);\n    }\n    if (fillKey) {\n      contextInstructions.push('fillStyle', fillState.fillStyle);\n    }\n    contextInstructions.push('textBaseline', 'middle');\n    contextInstructions.push('textAlign', 'center');\n    const leftRight = 0.5 - align;\n    let x = align * renderWidth + leftRight * strokeWidth;\n    const strokeInstructions = [];\n    const fillInstructions = [];\n    let lineHeight = 0;\n    let lineOffset = 0;\n    let widthHeightIndex = 0;\n    let lineWidthIndex = 0;\n    let previousFont;\n    for (let i = 0, ii = chunks.length; i < ii; i += 2) {\n      const text = chunks[i];\n      if (text === '\\n') {\n        lineOffset += lineHeight;\n        lineHeight = 0;\n        x = align * renderWidth + leftRight * strokeWidth;\n        ++lineWidthIndex;\n        continue;\n      }\n      const font = chunks[i + 1] || textState.font;\n      if (font !== previousFont) {\n        if (strokeKey) {\n          strokeInstructions.push('font', font);\n        }\n        if (fillKey) {\n          fillInstructions.push('font', font);\n        }\n        previousFont = font;\n      }\n      lineHeight = Math.max(lineHeight, heights[widthHeightIndex]);\n      const fillStrokeArgs = [\n        text,\n        x +\n          leftRight * widths[widthHeightIndex] +\n          align * (widths[widthHeightIndex] - lineWidths[lineWidthIndex]),\n        0.5 * (strokeWidth + lineHeight) + lineOffset,\n      ];\n      x += widths[widthHeightIndex];\n      if (strokeKey) {\n        strokeInstructions.push('strokeText', fillStrokeArgs);\n      }\n      if (fillKey) {\n        fillInstructions.push('fillText', fillStrokeArgs);\n      }\n      ++widthHeightIndex;\n    }\n    Array.prototype.push.apply(contextInstructions, strokeInstructions);\n    Array.prototype.push.apply(contextInstructions, fillInstructions);\n    this.labels_[key] = label;\n    return label;\n  }\n\n  /**\n   * @param {CanvasRenderingContext2D} context Context.\n   * @param {import(\"../../coordinate.js\").Coordinate} p1 1st point of the background box.\n   * @param {import(\"../../coordinate.js\").Coordinate} p2 2nd point of the background box.\n   * @param {import(\"../../coordinate.js\").Coordinate} p3 3rd point of the background box.\n   * @param {import(\"../../coordinate.js\").Coordinate} p4 4th point of the background box.\n   * @param {Array<*>} fillInstruction Fill instruction.\n   * @param {Array<*>} strokeInstruction Stroke instruction.\n   */\n  replayTextBackground_(\n    context,\n    p1,\n    p2,\n    p3,\n    p4,\n    fillInstruction,\n    strokeInstruction\n  ) {\n    context.beginPath();\n    context.moveTo.apply(context, p1);\n    context.lineTo.apply(context, p2);\n    context.lineTo.apply(context, p3);\n    context.lineTo.apply(context, p4);\n    context.lineTo.apply(context, p1);\n    if (fillInstruction) {\n      this.alignFill_ = /** @type {boolean} */ (fillInstruction[2]);\n      this.fill_(context);\n    }\n    if (strokeInstruction) {\n      this.setStrokeStyle_(\n        context,\n        /** @type {Array<*>} */ (strokeInstruction)\n      );\n      context.stroke();\n    }\n  }\n\n  /**\n   * @private\n   * @param {number} sheetWidth Width of the sprite sheet.\n   * @param {number} sheetHeight Height of the sprite sheet.\n   * @param {number} centerX X.\n   * @param {number} centerY Y.\n   * @param {number} width Width.\n   * @param {number} height Height.\n   * @param {number} anchorX Anchor X.\n   * @param {number} anchorY Anchor Y.\n   * @param {number} originX Origin X.\n   * @param {number} originY Origin Y.\n   * @param {number} rotation Rotation.\n   * @param {import(\"../../size.js\").Size} scale Scale.\n   * @param {boolean} snapToPixel Snap to pixel.\n   * @param {Array<number>} padding Padding.\n   * @param {boolean} fillStroke Background fill or stroke.\n   * @param {import(\"../../Feature.js\").FeatureLike} feature Feature.\n   * @return {ImageOrLabelDimensions} Dimensions for positioning and decluttering the image or label.\n   */\n  calculateImageOrLabelDimensions_(\n    sheetWidth,\n    sheetHeight,\n    centerX,\n    centerY,\n    width,\n    height,\n    anchorX,\n    anchorY,\n    originX,\n    originY,\n    rotation,\n    scale,\n    snapToPixel,\n    padding,\n    fillStroke,\n    feature\n  ) {\n    anchorX *= scale[0];\n    anchorY *= scale[1];\n    let x = centerX - anchorX;\n    let y = centerY - anchorY;\n\n    const w = width + originX > sheetWidth ? sheetWidth - originX : width;\n    const h = height + originY > sheetHeight ? sheetHeight - originY : height;\n    const boxW = padding[3] + w * scale[0] + padding[1];\n    const boxH = padding[0] + h * scale[1] + padding[2];\n    const boxX = x - padding[3];\n    const boxY = y - padding[0];\n\n    if (fillStroke || rotation !== 0) {\n      p1[0] = boxX;\n      p4[0] = boxX;\n      p1[1] = boxY;\n      p2[1] = boxY;\n      p2[0] = boxX + boxW;\n      p3[0] = p2[0];\n      p3[1] = boxY + boxH;\n      p4[1] = p3[1];\n    }\n\n    let transform;\n    if (rotation !== 0) {\n      transform = composeTransform(\n        createTransform(),\n        centerX,\n        centerY,\n        1,\n        1,\n        rotation,\n        -centerX,\n        -centerY\n      );\n\n      applyTransform(transform, p1);\n      applyTransform(transform, p2);\n      applyTransform(transform, p3);\n      applyTransform(transform, p4);\n      createOrUpdate(\n        Math.min(p1[0], p2[0], p3[0], p4[0]),\n        Math.min(p1[1], p2[1], p3[1], p4[1]),\n        Math.max(p1[0], p2[0], p3[0], p4[0]),\n        Math.max(p1[1], p2[1], p3[1], p4[1]),\n        tmpExtent\n      );\n    } else {\n      createOrUpdate(\n        Math.min(boxX, boxX + boxW),\n        Math.min(boxY, boxY + boxH),\n        Math.max(boxX, boxX + boxW),\n        Math.max(boxY, boxY + boxH),\n        tmpExtent\n      );\n    }\n    if (snapToPixel) {\n      x = Math.round(x);\n      y = Math.round(y);\n    }\n    return {\n      drawImageX: x,\n      drawImageY: y,\n      drawImageW: w,\n      drawImageH: h,\n      originX: originX,\n      originY: originY,\n      declutterBox: {\n        minX: tmpExtent[0],\n        minY: tmpExtent[1],\n        maxX: tmpExtent[2],\n        maxY: tmpExtent[3],\n        value: feature,\n      },\n      canvasTransform: transform,\n      scale: scale,\n    };\n  }\n\n  /**\n   * @private\n   * @param {CanvasRenderingContext2D} context Context.\n   * @param {number} contextScale Scale of the context.\n   * @param {import(\"../canvas.js\").Label|HTMLImageElement|HTMLCanvasElement|HTMLVideoElement} imageOrLabel Image.\n   * @param {ImageOrLabelDimensions} dimensions Dimensions.\n   * @param {number} opacity Opacity.\n   * @param {Array<*>} fillInstruction Fill instruction.\n   * @param {Array<*>} strokeInstruction Stroke instruction.\n   * @return {boolean} The image or label was rendered.\n   */\n  replayImageOrLabel_(\n    context,\n    contextScale,\n    imageOrLabel,\n    dimensions,\n    opacity,\n    fillInstruction,\n    strokeInstruction\n  ) {\n    const fillStroke = !!(fillInstruction || strokeInstruction);\n\n    const box = dimensions.declutterBox;\n    const canvas = context.canvas;\n    const strokePadding = strokeInstruction\n      ? (strokeInstruction[2] * dimensions.scale[0]) / 2\n      : 0;\n    const intersects =\n      box.minX - strokePadding <= canvas.width / contextScale &&\n      box.maxX + strokePadding >= 0 &&\n      box.minY - strokePadding <= canvas.height / contextScale &&\n      box.maxY + strokePadding >= 0;\n\n    if (intersects) {\n      if (fillStroke) {\n        this.replayTextBackground_(\n          context,\n          p1,\n          p2,\n          p3,\n          p4,\n          /** @type {Array<*>} */ (fillInstruction),\n          /** @type {Array<*>} */ (strokeInstruction)\n        );\n      }\n      drawImageOrLabel(\n        context,\n        dimensions.canvasTransform,\n        opacity,\n        imageOrLabel,\n        dimensions.originX,\n        dimensions.originY,\n        dimensions.drawImageW,\n        dimensions.drawImageH,\n        dimensions.drawImageX,\n        dimensions.drawImageY,\n        dimensions.scale\n      );\n    }\n    return true;\n  }\n\n  /**\n   * @private\n   * @param {CanvasRenderingContext2D} context Context.\n   */\n  fill_(context) {\n    if (this.alignFill_) {\n      const origin = applyTransform(this.renderedTransform_, [0, 0]);\n      const repeatSize = 512 * this.pixelRatio;\n      context.save();\n      context.translate(origin[0] % repeatSize, origin[1] % repeatSize);\n      context.rotate(this.viewRotation_);\n    }\n    context.fill();\n    if (this.alignFill_) {\n      context.restore();\n    }\n  }\n\n  /**\n   * @private\n   * @param {CanvasRenderingContext2D} context Context.\n   * @param {Array<*>} instruction Instruction.\n   */\n  setStrokeStyle_(context, instruction) {\n    context['strokeStyle'] =\n      /** @type {import(\"../../colorlike.js\").ColorLike} */ (instruction[1]);\n    context.lineWidth = /** @type {number} */ (instruction[2]);\n    context.lineCap = /** @type {CanvasLineCap} */ (instruction[3]);\n    context.lineJoin = /** @type {CanvasLineJoin} */ (instruction[4]);\n    context.miterLimit = /** @type {number} */ (instruction[5]);\n    context.lineDashOffset = /** @type {number} */ (instruction[7]);\n    context.setLineDash(/** @type {Array<number>} */ (instruction[6]));\n  }\n\n  /**\n   * @private\n   * @param {string|Array<string>} text The text to draw.\n   * @param {string} textKey The key of the text state.\n   * @param {string} strokeKey The key for the stroke state.\n   * @param {string} fillKey The key for the fill state.\n   * @return {{label: import(\"../canvas.js\").Label, anchorX: number, anchorY: number}} The text image and its anchor.\n   */\n  drawLabelWithPointPlacement_(text, textKey, strokeKey, fillKey) {\n    const textState = this.textStates[textKey];\n\n    const label = this.createLabel(text, textKey, fillKey, strokeKey);\n\n    const strokeState = this.strokeStates[strokeKey];\n    const pixelRatio = this.pixelRatio;\n    const align = horizontalTextAlign(\n      Array.isArray(text) ? text[0] : text,\n      textState.textAlign || defaultTextAlign\n    );\n    const baseline = TEXT_ALIGN[textState.textBaseline || defaultTextBaseline];\n    const strokeWidth =\n      strokeState && strokeState.lineWidth ? strokeState.lineWidth : 0;\n\n    // Remove the 2 pixels we added in createLabel() for the anchor\n    const width = label.width / pixelRatio - 2 * textState.scale[0];\n    const anchorX = align * width + 2 * (0.5 - align) * strokeWidth;\n    const anchorY =\n      (baseline * label.height) / pixelRatio +\n      2 * (0.5 - baseline) * strokeWidth;\n\n    return {\n      label: label,\n      anchorX: anchorX,\n      anchorY: anchorY,\n    };\n  }\n\n  /**\n   * @private\n   * @param {CanvasRenderingContext2D} context Context.\n   * @param {number} contextScale Scale of the context.\n   * @param {import(\"../../transform.js\").Transform} transform Transform.\n   * @param {Array<*>} instructions Instructions array.\n   * @param {boolean} snapToPixel Snap point symbols and text to integer pixels.\n   * @param {FeatureCallback<T>} [featureCallback] Feature callback.\n   * @param {import(\"../../extent.js\").Extent} [hitExtent] Only check\n   *     features that intersect this extent.\n   * @param {import(\"rbush\").default} [declutterTree] Declutter tree.\n   * @return {T|undefined} Callback result.\n   * @template T\n   */\n  execute_(\n    context,\n    contextScale,\n    transform,\n    instructions,\n    snapToPixel,\n    featureCallback,\n    hitExtent,\n    declutterTree\n  ) {\n    /** @type {Array<number>} */\n    let pixelCoordinates;\n    if (this.pixelCoordinates_ && equals(transform, this.renderedTransform_)) {\n      pixelCoordinates = this.pixelCoordinates_;\n    } else {\n      if (!this.pixelCoordinates_) {\n        this.pixelCoordinates_ = [];\n      }\n      pixelCoordinates = transform2D(\n        this.coordinates,\n        0,\n        this.coordinates.length,\n        2,\n        transform,\n        this.pixelCoordinates_\n      );\n      transformSetFromArray(this.renderedTransform_, transform);\n    }\n    let i = 0; // instruction index\n    const ii = instructions.length; // end of instructions\n    let d = 0; // data index\n    let dd; // end of per-instruction data\n    let anchorX,\n      anchorY,\n      prevX,\n      prevY,\n      roundX,\n      roundY,\n      image,\n      text,\n      textKey,\n      strokeKey,\n      fillKey;\n    let pendingFill = 0;\n    let pendingStroke = 0;\n    let lastFillInstruction = null;\n    let lastStrokeInstruction = null;\n    const coordinateCache = this.coordinateCache_;\n    const viewRotation = this.viewRotation_;\n    const viewRotationFromTransform =\n      Math.round(Math.atan2(-transform[1], transform[0]) * 1e12) / 1e12;\n\n    const state = /** @type {import(\"../../render.js\").State} */ ({\n      context: context,\n      pixelRatio: this.pixelRatio,\n      resolution: this.resolution,\n      rotation: viewRotation,\n    });\n\n    // When the batch size gets too big, performance decreases. 200 is a good\n    // balance between batch size and number of fill/stroke instructions.\n    const batchSize =\n      this.instructions != instructions || this.overlaps ? 0 : 200;\n    let /** @type {import(\"../../Feature.js\").FeatureLike} */ feature;\n    let x, y, currentGeometry;\n    while (i < ii) {\n      const instruction = instructions[i];\n      const type = /** @type {import(\"./Instruction.js\").default} */ (\n        instruction[0]\n      );\n      switch (type) {\n        case CanvasInstruction.BEGIN_GEOMETRY:\n          feature = /** @type {import(\"../../Feature.js\").FeatureLike} */ (\n            instruction[1]\n          );\n          currentGeometry = instruction[3];\n          if (!feature.getGeometry()) {\n            i = /** @type {number} */ (instruction[2]);\n          } else if (\n            hitExtent !== undefined &&\n            !intersects(hitExtent, currentGeometry.getExtent())\n          ) {\n            i = /** @type {number} */ (instruction[2]) + 1;\n          } else {\n            ++i;\n          }\n          break;\n        case CanvasInstruction.BEGIN_PATH:\n          if (pendingFill > batchSize) {\n            this.fill_(context);\n            pendingFill = 0;\n          }\n          if (pendingStroke > batchSize) {\n            context.stroke();\n            pendingStroke = 0;\n          }\n          if (!pendingFill && !pendingStroke) {\n            context.beginPath();\n            prevX = NaN;\n            prevY = NaN;\n          }\n          ++i;\n          break;\n        case CanvasInstruction.CIRCLE:\n          d = /** @type {number} */ (instruction[1]);\n          const x1 = pixelCoordinates[d];\n          const y1 = pixelCoordinates[d + 1];\n          const x2 = pixelCoordinates[d + 2];\n          const y2 = pixelCoordinates[d + 3];\n          const dx = x2 - x1;\n          const dy = y2 - y1;\n          const r = Math.sqrt(dx * dx + dy * dy);\n          context.moveTo(x1 + r, y1);\n          context.arc(x1, y1, r, 0, 2 * Math.PI, true);\n          ++i;\n          break;\n        case CanvasInstruction.CLOSE_PATH:\n          context.closePath();\n          ++i;\n          break;\n        case CanvasInstruction.CUSTOM:\n          d = /** @type {number} */ (instruction[1]);\n          dd = instruction[2];\n          const geometry =\n            /** @type {import(\"../../geom/SimpleGeometry.js\").default} */ (\n              instruction[3]\n            );\n          const renderer = instruction[4];\n          const fn = instruction.length == 6 ? instruction[5] : undefined;\n          state.geometry = geometry;\n          state.feature = feature;\n          if (!(i in coordinateCache)) {\n            coordinateCache[i] = [];\n          }\n          const coords = coordinateCache[i];\n          if (fn) {\n            fn(pixelCoordinates, d, dd, 2, coords);\n          } else {\n            coords[0] = pixelCoordinates[d];\n            coords[1] = pixelCoordinates[d + 1];\n            coords.length = 2;\n          }\n          renderer(coords, state);\n          ++i;\n          break;\n        case CanvasInstruction.DRAW_IMAGE:\n          d = /** @type {number} */ (instruction[1]);\n          dd = /** @type {number} */ (instruction[2]);\n          image =\n            /** @type {HTMLCanvasElement|HTMLVideoElement|HTMLImageElement} */ (\n              instruction[3]\n            );\n\n          // Remaining arguments in DRAW_IMAGE are in alphabetical order\n          anchorX = /** @type {number} */ (instruction[4]);\n          anchorY = /** @type {number} */ (instruction[5]);\n          let height = /** @type {number} */ (instruction[6]);\n          const opacity = /** @type {number} */ (instruction[7]);\n          const originX = /** @type {number} */ (instruction[8]);\n          const originY = /** @type {number} */ (instruction[9]);\n          const rotateWithView = /** @type {boolean} */ (instruction[10]);\n          let rotation = /** @type {number} */ (instruction[11]);\n          const scale = /** @type {import(\"../../size.js\").Size} */ (\n            instruction[12]\n          );\n          let width = /** @type {number} */ (instruction[13]);\n          const declutterMode =\n            /** @type {\"declutter\"|\"obstacle\"|\"none\"|undefined} */ (\n              instruction[14]\n            );\n          const declutterImageWithText =\n            /** @type {import(\"../canvas.js\").DeclutterImageWithText} */ (\n              instruction[15]\n            );\n\n          if (!image && instruction.length >= 20) {\n            // create label images\n            text = /** @type {string} */ (instruction[19]);\n            textKey = /** @type {string} */ (instruction[20]);\n            strokeKey = /** @type {string} */ (instruction[21]);\n            fillKey = /** @type {string} */ (instruction[22]);\n            const labelWithAnchor = this.drawLabelWithPointPlacement_(\n              text,\n              textKey,\n              strokeKey,\n              fillKey\n            );\n            image = labelWithAnchor.label;\n            instruction[3] = image;\n            const textOffsetX = /** @type {number} */ (instruction[23]);\n            anchorX = (labelWithAnchor.anchorX - textOffsetX) * this.pixelRatio;\n            instruction[4] = anchorX;\n            const textOffsetY = /** @type {number} */ (instruction[24]);\n            anchorY = (labelWithAnchor.anchorY - textOffsetY) * this.pixelRatio;\n            instruction[5] = anchorY;\n            height = image.height;\n            instruction[6] = height;\n            width = image.width;\n            instruction[13] = width;\n          }\n\n          let geometryWidths;\n          if (instruction.length > 25) {\n            geometryWidths = /** @type {number} */ (instruction[25]);\n          }\n\n          let padding, backgroundFill, backgroundStroke;\n          if (instruction.length > 17) {\n            padding = /** @type {Array<number>} */ (instruction[16]);\n            backgroundFill = /** @type {boolean} */ (instruction[17]);\n            backgroundStroke = /** @type {boolean} */ (instruction[18]);\n          } else {\n            padding = defaultPadding;\n            backgroundFill = false;\n            backgroundStroke = false;\n          }\n\n          if (rotateWithView && viewRotationFromTransform) {\n            // Canvas is expected to be rotated to reverse view rotation.\n            rotation += viewRotation;\n          } else if (!rotateWithView && !viewRotationFromTransform) {\n            // Canvas is not rotated, images need to be rotated back to be north-up.\n            rotation -= viewRotation;\n          }\n          let widthIndex = 0;\n          for (; d < dd; d += 2) {\n            if (\n              geometryWidths &&\n              geometryWidths[widthIndex++] < width / this.pixelRatio\n            ) {\n              continue;\n            }\n            const dimensions = this.calculateImageOrLabelDimensions_(\n              image.width,\n              image.height,\n              pixelCoordinates[d],\n              pixelCoordinates[d + 1],\n              width,\n              height,\n              anchorX,\n              anchorY,\n              originX,\n              originY,\n              rotation,\n              scale,\n              snapToPixel,\n              padding,\n              backgroundFill || backgroundStroke,\n              feature\n            );\n            /** @type {ReplayImageOrLabelArgs} */\n            const args = [\n              context,\n              contextScale,\n              image,\n              dimensions,\n              opacity,\n              backgroundFill\n                ? /** @type {Array<*>} */ (lastFillInstruction)\n                : null,\n              backgroundStroke\n                ? /** @type {Array<*>} */ (lastStrokeInstruction)\n                : null,\n            ];\n            if (declutterTree) {\n              if (declutterMode === 'none') {\n                // not rendered in declutter group\n                continue;\n              } else if (declutterMode === 'obstacle') {\n                // will always be drawn, thus no collision detection, but insert as obstacle\n                declutterTree.insert(dimensions.declutterBox);\n                continue;\n              } else {\n                let imageArgs;\n                let imageDeclutterBox;\n                if (declutterImageWithText) {\n                  const index = dd - d;\n                  if (!declutterImageWithText[index]) {\n                    // We now have the image for an image+text combination.\n                    declutterImageWithText[index] = args;\n                    // Don't render anything for now, wait for the text.\n                    continue;\n                  }\n                  imageArgs = declutterImageWithText[index];\n                  delete declutterImageWithText[index];\n                  imageDeclutterBox = getDeclutterBox(imageArgs);\n                  if (declutterTree.collides(imageDeclutterBox)) {\n                    continue;\n                  }\n                }\n                if (declutterTree.collides(dimensions.declutterBox)) {\n                  continue;\n                }\n                if (imageArgs) {\n                  // We now have image and text for an image+text combination.\n                  declutterTree.insert(imageDeclutterBox);\n                  // Render the image before we render the text.\n                  this.replayImageOrLabel_.apply(this, imageArgs);\n                }\n                declutterTree.insert(dimensions.declutterBox);\n              }\n            }\n            this.replayImageOrLabel_.apply(this, args);\n          }\n          ++i;\n          break;\n        case CanvasInstruction.DRAW_CHARS:\n          const begin = /** @type {number} */ (instruction[1]);\n          const end = /** @type {number} */ (instruction[2]);\n          const baseline = /** @type {number} */ (instruction[3]);\n          const overflow = /** @type {number} */ (instruction[4]);\n          fillKey = /** @type {string} */ (instruction[5]);\n          const maxAngle = /** @type {number} */ (instruction[6]);\n          const measurePixelRatio = /** @type {number} */ (instruction[7]);\n          const offsetY = /** @type {number} */ (instruction[8]);\n          strokeKey = /** @type {string} */ (instruction[9]);\n          const strokeWidth = /** @type {number} */ (instruction[10]);\n          text = /** @type {string} */ (instruction[11]);\n          textKey = /** @type {string} */ (instruction[12]);\n          const pixelRatioScale = [\n            /** @type {number} */ (instruction[13]),\n            /** @type {number} */ (instruction[13]),\n          ];\n\n          const textState = this.textStates[textKey];\n          const font = textState.font;\n          const textScale = [\n            textState.scale[0] * measurePixelRatio,\n            textState.scale[1] * measurePixelRatio,\n          ];\n\n          let cachedWidths;\n          if (font in this.widths_) {\n            cachedWidths = this.widths_[font];\n          } else {\n            cachedWidths = {};\n            this.widths_[font] = cachedWidths;\n          }\n\n          const pathLength = lineStringLength(pixelCoordinates, begin, end, 2);\n          const textLength =\n            Math.abs(textScale[0]) *\n            measureAndCacheTextWidth(font, text, cachedWidths);\n          if (overflow || textLength <= pathLength) {\n            const textAlign = this.textStates[textKey].textAlign;\n            const startM = (pathLength - textLength) * TEXT_ALIGN[textAlign];\n            const parts = drawTextOnPath(\n              pixelCoordinates,\n              begin,\n              end,\n              2,\n              text,\n              startM,\n              maxAngle,\n              Math.abs(textScale[0]),\n              measureAndCacheTextWidth,\n              font,\n              cachedWidths,\n              viewRotationFromTransform ? 0 : this.viewRotation_\n            );\n            drawChars: if (parts) {\n              /** @type {Array<ReplayImageOrLabelArgs>} */\n              const replayImageOrLabelArgs = [];\n              let c, cc, chars, label, part;\n              if (strokeKey) {\n                for (c = 0, cc = parts.length; c < cc; ++c) {\n                  part = parts[c]; // x, y, anchorX, rotation, chunk\n                  chars = /** @type {string} */ (part[4]);\n                  label = this.createLabel(chars, textKey, '', strokeKey);\n                  anchorX =\n                    /** @type {number} */ (part[2]) +\n                    (textScale[0] < 0 ? -strokeWidth : strokeWidth);\n                  anchorY =\n                    baseline * label.height +\n                    ((0.5 - baseline) * 2 * strokeWidth * textScale[1]) /\n                      textScale[0] -\n                    offsetY;\n                  const dimensions = this.calculateImageOrLabelDimensions_(\n                    label.width,\n                    label.height,\n                    part[0],\n                    part[1],\n                    label.width,\n                    label.height,\n                    anchorX,\n                    anchorY,\n                    0,\n                    0,\n                    part[3],\n                    pixelRatioScale,\n                    false,\n                    defaultPadding,\n                    false,\n                    feature\n                  );\n                  if (\n                    declutterTree &&\n                    declutterTree.collides(dimensions.declutterBox)\n                  ) {\n                    break drawChars;\n                  }\n                  replayImageOrLabelArgs.push([\n                    context,\n                    contextScale,\n                    label,\n                    dimensions,\n                    1,\n                    null,\n                    null,\n                  ]);\n                }\n              }\n              if (fillKey) {\n                for (c = 0, cc = parts.length; c < cc; ++c) {\n                  part = parts[c]; // x, y, anchorX, rotation, chunk\n                  chars = /** @type {string} */ (part[4]);\n                  label = this.createLabel(chars, textKey, fillKey, '');\n                  anchorX = /** @type {number} */ (part[2]);\n                  anchorY = baseline * label.height - offsetY;\n                  const dimensions = this.calculateImageOrLabelDimensions_(\n                    label.width,\n                    label.height,\n                    part[0],\n                    part[1],\n                    label.width,\n                    label.height,\n                    anchorX,\n                    anchorY,\n                    0,\n                    0,\n                    part[3],\n                    pixelRatioScale,\n                    false,\n                    defaultPadding,\n                    false,\n                    feature\n                  );\n                  if (\n                    declutterTree &&\n                    declutterTree.collides(dimensions.declutterBox)\n                  ) {\n                    break drawChars;\n                  }\n                  replayImageOrLabelArgs.push([\n                    context,\n                    contextScale,\n                    label,\n                    dimensions,\n                    1,\n                    null,\n                    null,\n                  ]);\n                }\n              }\n              if (declutterTree) {\n                declutterTree.load(replayImageOrLabelArgs.map(getDeclutterBox));\n              }\n              for (let i = 0, ii = replayImageOrLabelArgs.length; i < ii; ++i) {\n                this.replayImageOrLabel_.apply(this, replayImageOrLabelArgs[i]);\n              }\n            }\n          }\n          ++i;\n          break;\n        case CanvasInstruction.END_GEOMETRY:\n          if (featureCallback !== undefined) {\n            feature = /** @type {import(\"../../Feature.js\").FeatureLike} */ (\n              instruction[1]\n            );\n            const result = featureCallback(feature, currentGeometry);\n            if (result) {\n              return result;\n            }\n          }\n          ++i;\n          break;\n        case CanvasInstruction.FILL:\n          if (batchSize) {\n            pendingFill++;\n          } else {\n            this.fill_(context);\n          }\n          ++i;\n          break;\n        case CanvasInstruction.MOVE_TO_LINE_TO:\n          d = /** @type {number} */ (instruction[1]);\n          dd = /** @type {number} */ (instruction[2]);\n          x = pixelCoordinates[d];\n          y = pixelCoordinates[d + 1];\n          roundX = (x + 0.5) | 0;\n          roundY = (y + 0.5) | 0;\n          if (roundX !== prevX || roundY !== prevY) {\n            context.moveTo(x, y);\n            prevX = roundX;\n            prevY = roundY;\n          }\n          for (d += 2; d < dd; d += 2) {\n            x = pixelCoordinates[d];\n            y = pixelCoordinates[d + 1];\n            roundX = (x + 0.5) | 0;\n            roundY = (y + 0.5) | 0;\n            if (d == dd - 2 || roundX !== prevX || roundY !== prevY) {\n              context.lineTo(x, y);\n              prevX = roundX;\n              prevY = roundY;\n            }\n          }\n          ++i;\n          break;\n        case CanvasInstruction.SET_FILL_STYLE:\n          lastFillInstruction = instruction;\n          this.alignFill_ = instruction[2];\n\n          if (pendingFill) {\n            this.fill_(context);\n            pendingFill = 0;\n            if (pendingStroke) {\n              context.stroke();\n              pendingStroke = 0;\n            }\n          }\n\n          context.fillStyle =\n            /** @type {import(\"../../colorlike.js\").ColorLike} */ (\n              instruction[1]\n            );\n          ++i;\n          break;\n        case CanvasInstruction.SET_STROKE_STYLE:\n          lastStrokeInstruction = instruction;\n          if (pendingStroke) {\n            context.stroke();\n            pendingStroke = 0;\n          }\n          this.setStrokeStyle_(context, /** @type {Array<*>} */ (instruction));\n          ++i;\n          break;\n        case CanvasInstruction.STROKE:\n          if (batchSize) {\n            pendingStroke++;\n          } else {\n            context.stroke();\n          }\n          ++i;\n          break;\n        default: // consume the instruction anyway, to avoid an infinite loop\n          ++i;\n          break;\n      }\n    }\n    if (pendingFill) {\n      this.fill_(context);\n    }\n    if (pendingStroke) {\n      context.stroke();\n    }\n    return undefined;\n  }\n\n  /**\n   * @param {CanvasRenderingContext2D} context Context.\n   * @param {number} contextScale Scale of the context.\n   * @param {import(\"../../transform.js\").Transform} transform Transform.\n   * @param {number} viewRotation View rotation.\n   * @param {boolean} snapToPixel Snap point symbols and text to integer pixels.\n   * @param {import(\"rbush\").default} [declutterTree] Declutter tree.\n   */\n  execute(\n    context,\n    contextScale,\n    transform,\n    viewRotation,\n    snapToPixel,\n    declutterTree\n  ) {\n    this.viewRotation_ = viewRotation;\n    this.execute_(\n      context,\n      contextScale,\n      transform,\n      this.instructions,\n      snapToPixel,\n      undefined,\n      undefined,\n      declutterTree\n    );\n  }\n\n  /**\n   * @param {CanvasRenderingContext2D} context Context.\n   * @param {import(\"../../transform.js\").Transform} transform Transform.\n   * @param {number} viewRotation View rotation.\n   * @param {FeatureCallback<T>} [featureCallback] Feature callback.\n   * @param {import(\"../../extent.js\").Extent} [hitExtent] Only check\n   *     features that intersect this extent.\n   * @return {T|undefined} Callback result.\n   * @template T\n   */\n  executeHitDetection(\n    context,\n    transform,\n    viewRotation,\n    featureCallback,\n    hitExtent\n  ) {\n    this.viewRotation_ = viewRotation;\n    return this.execute_(\n      context,\n      1,\n      transform,\n      this.hitDetectionInstructions,\n      true,\n      featureCallback,\n      hitExtent\n    );\n  }\n}\n\nexport default Executor;\n","/**\n * @module ol/render/canvas/ExecutorGroup\n */\n\nimport Executor from './Executor.js';\nimport {ascending} from '../../array.js';\nimport {buffer, createEmpty, extendCoordinate} from '../../extent.js';\nimport {\n  compose as composeTransform,\n  create as createTransform,\n} from '../../transform.js';\nimport {createCanvasContext2D} from '../../dom.js';\nimport {isEmpty} from '../../obj.js';\nimport {transform2D} from '../../geom/flat/transform.js';\n\n/**\n * @const\n * @type {Array<import(\"../canvas.js\").BuilderType>}\n */\nconst ORDER = ['Polygon', 'Circle', 'LineString', 'Image', 'Text', 'Default'];\n\nclass ExecutorGroup {\n  /**\n   * @param {import(\"../../extent.js\").Extent} maxExtent Max extent for clipping. When a\n   * `maxExtent` was set on the Builder for this executor group, the same `maxExtent`\n   * should be set here, unless the target context does not exceed that extent (which\n   * can be the case when rendering to tiles).\n   * @param {number} resolution Resolution.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {boolean} overlaps The executor group can have overlapping geometries.\n   * @param {!Object<string, !Object<import(\"../canvas.js\").BuilderType, import(\"../canvas.js\").SerializableInstructions>>} allInstructions\n   * The serializable instructions.\n   * @param {number} [renderBuffer] Optional rendering buffer.\n   */\n  constructor(\n    maxExtent,\n    resolution,\n    pixelRatio,\n    overlaps,\n    allInstructions,\n    renderBuffer\n  ) {\n    /**\n     * @private\n     * @type {import(\"../../extent.js\").Extent}\n     */\n    this.maxExtent_ = maxExtent;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.overlaps_ = overlaps;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.pixelRatio_ = pixelRatio;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.resolution_ = resolution;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.renderBuffer_ = renderBuffer;\n\n    /**\n     * @private\n     * @type {!Object<string, !Object<import(\"../canvas.js\").BuilderType, import(\"./Executor\").default>>}\n     */\n    this.executorsByZIndex_ = {};\n\n    /**\n     * @private\n     * @type {CanvasRenderingContext2D}\n     */\n    this.hitDetectionContext_ = null;\n\n    /**\n     * @private\n     * @type {import(\"../../transform.js\").Transform}\n     */\n    this.hitDetectionTransform_ = createTransform();\n\n    this.createExecutors_(allInstructions);\n  }\n\n  /**\n   * @param {CanvasRenderingContext2D} context Context.\n   * @param {import(\"../../transform.js\").Transform} transform Transform.\n   */\n  clip(context, transform) {\n    const flatClipCoords = this.getClipCoords(transform);\n    context.beginPath();\n    context.moveTo(flatClipCoords[0], flatClipCoords[1]);\n    context.lineTo(flatClipCoords[2], flatClipCoords[3]);\n    context.lineTo(flatClipCoords[4], flatClipCoords[5]);\n    context.lineTo(flatClipCoords[6], flatClipCoords[7]);\n    context.clip();\n  }\n\n  /**\n   * Create executors and populate them using the provided instructions.\n   * @private\n   * @param {!Object<string, !Object<import(\"../canvas.js\").BuilderType, import(\"../canvas.js\").SerializableInstructions>>} allInstructions The serializable instructions\n   */\n  createExecutors_(allInstructions) {\n    for (const zIndex in allInstructions) {\n      let executors = this.executorsByZIndex_[zIndex];\n      if (executors === undefined) {\n        executors = {};\n        this.executorsByZIndex_[zIndex] = executors;\n      }\n      const instructionByZindex = allInstructions[zIndex];\n      for (const builderType in instructionByZindex) {\n        const instructions = instructionByZindex[builderType];\n        executors[builderType] = new Executor(\n          this.resolution_,\n          this.pixelRatio_,\n          this.overlaps_,\n          instructions\n        );\n      }\n    }\n  }\n\n  /**\n   * @param {Array<import(\"../canvas.js\").BuilderType>} executors Executors.\n   * @return {boolean} Has executors of the provided types.\n   */\n  hasExecutors(executors) {\n    for (const zIndex in this.executorsByZIndex_) {\n      const candidates = this.executorsByZIndex_[zIndex];\n      for (let i = 0, ii = executors.length; i < ii; ++i) {\n        if (executors[i] in candidates) {\n          return true;\n        }\n      }\n    }\n    return false;\n  }\n\n  /**\n   * @param {import(\"../../coordinate.js\").Coordinate} coordinate Coordinate.\n   * @param {number} resolution Resolution.\n   * @param {number} rotation Rotation.\n   * @param {number} hitTolerance Hit tolerance in pixels.\n   * @param {function(import(\"../../Feature.js\").FeatureLike, import(\"../../geom/SimpleGeometry.js\").default, number): T} callback Feature callback.\n   * @param {Array<import(\"../../Feature.js\").FeatureLike>} declutteredFeatures Decluttered features.\n   * @return {T|undefined} Callback result.\n   * @template T\n   */\n  forEachFeatureAtCoordinate(\n    coordinate,\n    resolution,\n    rotation,\n    hitTolerance,\n    callback,\n    declutteredFeatures\n  ) {\n    hitTolerance = Math.round(hitTolerance);\n    const contextSize = hitTolerance * 2 + 1;\n    const transform = composeTransform(\n      this.hitDetectionTransform_,\n      hitTolerance + 0.5,\n      hitTolerance + 0.5,\n      1 / resolution,\n      -1 / resolution,\n      -rotation,\n      -coordinate[0],\n      -coordinate[1]\n    );\n\n    const newContext = !this.hitDetectionContext_;\n    if (newContext) {\n      this.hitDetectionContext_ = createCanvasContext2D(\n        contextSize,\n        contextSize,\n        undefined,\n        {willReadFrequently: true}\n      );\n    }\n    const context = this.hitDetectionContext_;\n\n    if (\n      context.canvas.width !== contextSize ||\n      context.canvas.height !== contextSize\n    ) {\n      context.canvas.width = contextSize;\n      context.canvas.height = contextSize;\n    } else if (!newContext) {\n      context.clearRect(0, 0, contextSize, contextSize);\n    }\n\n    /**\n     * @type {import(\"../../extent.js\").Extent}\n     */\n    let hitExtent;\n    if (this.renderBuffer_ !== undefined) {\n      hitExtent = createEmpty();\n      extendCoordinate(hitExtent, coordinate);\n      buffer(\n        hitExtent,\n        resolution * (this.renderBuffer_ + hitTolerance),\n        hitExtent\n      );\n    }\n\n    const indexes = getPixelIndexArray(hitTolerance);\n\n    let builderType;\n\n    /**\n     * @param {import(\"../../Feature.js\").FeatureLike} feature Feature.\n     * @param {import(\"../../geom/SimpleGeometry.js\").default} geometry Geometry.\n     * @return {T|undefined} Callback result.\n     */\n    function featureCallback(feature, geometry) {\n      const imageData = context.getImageData(\n        0,\n        0,\n        contextSize,\n        contextSize\n      ).data;\n      for (let i = 0, ii = indexes.length; i < ii; i++) {\n        if (imageData[indexes[i]] > 0) {\n          if (\n            !declutteredFeatures ||\n            (builderType !== 'Image' && builderType !== 'Text') ||\n            declutteredFeatures.includes(feature)\n          ) {\n            const idx = (indexes[i] - 3) / 4;\n            const x = hitTolerance - (idx % contextSize);\n            const y = hitTolerance - ((idx / contextSize) | 0);\n            const result = callback(feature, geometry, x * x + y * y);\n            if (result) {\n              return result;\n            }\n          }\n          context.clearRect(0, 0, contextSize, contextSize);\n          break;\n        }\n      }\n      return undefined;\n    }\n\n    /** @type {Array<number>} */\n    const zs = Object.keys(this.executorsByZIndex_).map(Number);\n    zs.sort(ascending);\n\n    let i, j, executors, executor, result;\n    for (i = zs.length - 1; i >= 0; --i) {\n      const zIndexKey = zs[i].toString();\n      executors = this.executorsByZIndex_[zIndexKey];\n      for (j = ORDER.length - 1; j >= 0; --j) {\n        builderType = ORDER[j];\n        executor = executors[builderType];\n        if (executor !== undefined) {\n          result = executor.executeHitDetection(\n            context,\n            transform,\n            rotation,\n            featureCallback,\n            hitExtent\n          );\n          if (result) {\n            return result;\n          }\n        }\n      }\n    }\n    return undefined;\n  }\n\n  /**\n   * @param {import(\"../../transform.js\").Transform} transform Transform.\n   * @return {Array<number>|null} Clip coordinates.\n   */\n  getClipCoords(transform) {\n    const maxExtent = this.maxExtent_;\n    if (!maxExtent) {\n      return null;\n    }\n    const minX = maxExtent[0];\n    const minY = maxExtent[1];\n    const maxX = maxExtent[2];\n    const maxY = maxExtent[3];\n    const flatClipCoords = [minX, minY, minX, maxY, maxX, maxY, maxX, minY];\n    transform2D(flatClipCoords, 0, 8, 2, transform, flatClipCoords);\n    return flatClipCoords;\n  }\n\n  /**\n   * @return {boolean} Is empty.\n   */\n  isEmpty() {\n    return isEmpty(this.executorsByZIndex_);\n  }\n\n  /**\n   * @param {CanvasRenderingContext2D} context Context.\n   * @param {number} contextScale Scale of the context.\n   * @param {import(\"../../transform.js\").Transform} transform Transform.\n   * @param {number} viewRotation View rotation.\n   * @param {boolean} snapToPixel Snap point symbols and test to integer pixel.\n   * @param {Array<import(\"../canvas.js\").BuilderType>} [builderTypes] Ordered replay types to replay.\n   *     Default is {@link module:ol/render/replay~ORDER}\n   * @param {import(\"rbush\").default} [declutterTree] Declutter tree.\n   */\n  execute(\n    context,\n    contextScale,\n    transform,\n    viewRotation,\n    snapToPixel,\n    builderTypes,\n    declutterTree\n  ) {\n    /** @type {Array<number>} */\n    const zs = Object.keys(this.executorsByZIndex_).map(Number);\n    zs.sort(ascending);\n\n    // setup clipping so that the parts of over-simplified geometries are not\n    // visible outside the current extent when panning\n    if (this.maxExtent_) {\n      context.save();\n      this.clip(context, transform);\n    }\n\n    builderTypes = builderTypes ? builderTypes : ORDER;\n    let i, ii, j, jj, replays, replay;\n    if (declutterTree) {\n      zs.reverse();\n    }\n    for (i = 0, ii = zs.length; i < ii; ++i) {\n      const zIndexKey = zs[i].toString();\n      replays = this.executorsByZIndex_[zIndexKey];\n      for (j = 0, jj = builderTypes.length; j < jj; ++j) {\n        const builderType = builderTypes[j];\n        replay = replays[builderType];\n        if (replay !== undefined) {\n          replay.execute(\n            context,\n            contextScale,\n            transform,\n            viewRotation,\n            snapToPixel,\n            declutterTree\n          );\n        }\n      }\n    }\n\n    if (this.maxExtent_) {\n      context.restore();\n    }\n  }\n}\n\n/**\n * This cache is used to store arrays of indexes for calculated pixel circles\n * to increase performance.\n * It is a static property to allow each Replaygroup to access it.\n * @type {Object<number, Array<number>>}\n */\nconst circlePixelIndexArrayCache = {};\n\n/**\n * This methods creates an array with indexes of all pixels within a circle,\n * ordered by how close they are to the center.\n * A cache is used to increase performance.\n * @param {number} radius Radius.\n * @return {Array<number>} An array with indexes within a circle.\n */\nexport function getPixelIndexArray(radius) {\n  if (circlePixelIndexArrayCache[radius] !== undefined) {\n    return circlePixelIndexArrayCache[radius];\n  }\n\n  const size = radius * 2 + 1;\n  const maxDistanceSq = radius * radius;\n  const distances = new Array(maxDistanceSq + 1);\n  for (let i = 0; i <= radius; ++i) {\n    for (let j = 0; j <= radius; ++j) {\n      const distanceSq = i * i + j * j;\n      if (distanceSq > maxDistanceSq) {\n        break;\n      }\n      let distance = distances[distanceSq];\n      if (!distance) {\n        distance = [];\n        distances[distanceSq] = distance;\n      }\n      distance.push(((radius + i) * size + (radius + j)) * 4 + 3);\n      if (i > 0) {\n        distance.push(((radius - i) * size + (radius + j)) * 4 + 3);\n      }\n      if (j > 0) {\n        distance.push(((radius + i) * size + (radius - j)) * 4 + 3);\n        if (i > 0) {\n          distance.push(((radius - i) * size + (radius - j)) * 4 + 3);\n        }\n      }\n    }\n  }\n\n  const pixelIndex = [];\n  for (let i = 0, ii = distances.length; i < ii; ++i) {\n    if (distances[i]) {\n      pixelIndex.push(...distances[i]);\n    }\n  }\n\n  circlePixelIndexArrayCache[radius] = pixelIndex;\n  return pixelIndex;\n}\n\nexport default ExecutorGroup;\n","/**\n * @module ol/render/canvas/hitdetect\n */\n\nimport CanvasImmediateRenderer from './Immediate.js';\nimport {Icon} from '../../style.js';\nimport {ascending} from '../../array.js';\nimport {clamp} from '../../math.js';\nimport {createCanvasContext2D} from '../../dom.js';\nimport {intersects} from '../../extent.js';\n\nexport const HIT_DETECT_RESOLUTION = 0.5;\n\n/**\n * @param {import(\"../../size.js\").Size} size Canvas size in css pixels.\n * @param {Array<import(\"../../transform.js\").Transform>} transforms Transforms\n * for rendering features to all worlds of the viewport, from coordinates to css\n * pixels.\n * @param {Array<import(\"../../Feature.js\").FeatureLike>} features\n * Features to consider for hit detection.\n * @param {import(\"../../style/Style.js\").StyleFunction|undefined} styleFunction\n * Layer style function.\n * @param {import(\"../../extent.js\").Extent} extent Extent.\n * @param {number} resolution Resolution.\n * @param {number} rotation Rotation.\n * @return {ImageData} Hit detection image data.\n */\nexport function createHitDetectionImageData(\n  size,\n  transforms,\n  features,\n  styleFunction,\n  extent,\n  resolution,\n  rotation\n) {\n  const width = size[0] * HIT_DETECT_RESOLUTION;\n  const height = size[1] * HIT_DETECT_RESOLUTION;\n  const context = createCanvasContext2D(width, height);\n  context.imageSmoothingEnabled = false;\n  const canvas = context.canvas;\n  const renderer = new CanvasImmediateRenderer(\n    context,\n    HIT_DETECT_RESOLUTION,\n    extent,\n    null,\n    rotation\n  );\n  const featureCount = features.length;\n  // Stretch hit detection index to use the whole available color range\n  const indexFactor = Math.floor((256 * 256 * 256 - 1) / featureCount);\n  const featuresByZIndex = {};\n  for (let i = 1; i <= featureCount; ++i) {\n    const feature = features[i - 1];\n    const featureStyleFunction = feature.getStyleFunction() || styleFunction;\n    if (!styleFunction) {\n      continue;\n    }\n    let styles = featureStyleFunction(feature, resolution);\n    if (!styles) {\n      continue;\n    }\n    if (!Array.isArray(styles)) {\n      styles = [styles];\n    }\n    const index = i * indexFactor;\n    const color = index.toString(16).padStart(7, '#00000');\n    for (let j = 0, jj = styles.length; j < jj; ++j) {\n      const originalStyle = styles[j];\n      const geometry = originalStyle.getGeometryFunction()(feature);\n      if (!geometry || !intersects(extent, geometry.getExtent())) {\n        continue;\n      }\n      const style = originalStyle.clone();\n      const fill = style.getFill();\n      if (fill) {\n        fill.setColor(color);\n      }\n      const stroke = style.getStroke();\n      if (stroke) {\n        stroke.setColor(color);\n        stroke.setLineDash(null);\n      }\n      style.setText(undefined);\n      const image = originalStyle.getImage();\n      if (image && image.getOpacity() !== 0) {\n        const imgSize = image.getImageSize();\n        if (!imgSize) {\n          continue;\n        }\n\n        const imgContext = createCanvasContext2D(\n          imgSize[0],\n          imgSize[1],\n          undefined,\n          {alpha: false}\n        );\n        const img = imgContext.canvas;\n        imgContext.fillStyle = color;\n        imgContext.fillRect(0, 0, img.width, img.height);\n        style.setImage(\n          new Icon({\n            img: img,\n            imgSize: imgSize,\n            anchor: image.getAnchor(),\n            anchorXUnits: 'pixels',\n            anchorYUnits: 'pixels',\n            offset: image.getOrigin(),\n            opacity: 1,\n            size: image.getSize(),\n            scale: image.getScale(),\n            rotation: image.getRotation(),\n            rotateWithView: image.getRotateWithView(),\n          })\n        );\n      }\n      const zIndex = style.getZIndex() || 0;\n      let byGeometryType = featuresByZIndex[zIndex];\n      if (!byGeometryType) {\n        byGeometryType = {};\n        featuresByZIndex[zIndex] = byGeometryType;\n        byGeometryType['Polygon'] = [];\n        byGeometryType['Circle'] = [];\n        byGeometryType['LineString'] = [];\n        byGeometryType['Point'] = [];\n      }\n      const type = geometry.getType();\n      if (type === 'GeometryCollection') {\n        const geometries =\n          /** @type {import(\"../../geom/GeometryCollection.js\").default} */ (\n            geometry\n          ).getGeometriesArrayRecursive();\n        for (let i = 0, ii = geometries.length; i < ii; ++i) {\n          const geometry = geometries[i];\n          byGeometryType[geometry.getType().replace('Multi', '')].push(\n            geometry,\n            style\n          );\n        }\n      } else {\n        byGeometryType[type.replace('Multi', '')].push(geometry, style);\n      }\n    }\n  }\n\n  const zIndexKeys = Object.keys(featuresByZIndex).map(Number).sort(ascending);\n  for (let i = 0, ii = zIndexKeys.length; i < ii; ++i) {\n    const byGeometryType = featuresByZIndex[zIndexKeys[i]];\n    for (const type in byGeometryType) {\n      const geomAndStyle = byGeometryType[type];\n      for (let j = 0, jj = geomAndStyle.length; j < jj; j += 2) {\n        renderer.setStyle(geomAndStyle[j + 1]);\n        for (let k = 0, kk = transforms.length; k < kk; ++k) {\n          renderer.setTransform(transforms[k]);\n          renderer.drawGeometry(geomAndStyle[j]);\n        }\n      }\n    }\n  }\n  return context.getImageData(0, 0, canvas.width, canvas.height);\n}\n\n/**\n * @param {import(\"../../pixel\").Pixel} pixel Pixel coordinate on the hit\n * detection canvas in css pixels.\n * @param {Array<F>} features Features. Has to\n * match the `features` array that was passed to `createHitDetectionImageData()`.\n * @param {ImageData} imageData Hit detection image data generated by\n * `createHitDetectionImageData()`.\n * @return {Array<F>} Features.\n * @template {import(\"../../Feature.js\").FeatureLike} F\n */\nexport function hitDetect(pixel, features, imageData) {\n  const resultFeatures = [];\n  if (imageData) {\n    const x = Math.floor(Math.round(pixel[0]) * HIT_DETECT_RESOLUTION);\n    const y = Math.floor(Math.round(pixel[1]) * HIT_DETECT_RESOLUTION);\n    // The pixel coordinate is clamped down to the hit-detect canvas' size to account\n    // for browsers returning coordinates slightly larger than the actual canvas size\n    // due to a non-integer pixel ratio.\n    const index =\n      (clamp(x, 0, imageData.width - 1) +\n        clamp(y, 0, imageData.height - 1) * imageData.width) *\n      4;\n    const r = imageData.data[index];\n    const g = imageData.data[index + 1];\n    const b = imageData.data[index + 2];\n    const i = b + 256 * (g + 256 * r);\n    const indexFactor = Math.floor((256 * 256 * 256 - 1) / features.length);\n    if (i && i % indexFactor === 0) {\n      resultFeatures.push(features[i / indexFactor - 1]);\n    }\n  }\n  // @ts-ignore Features are copied from `features` to `resultFeatures` so the type should be the same\n  return resultFeatures;\n}\n","/**\n * @module ol/renderer/canvas/VectorLayer\n */\nimport CanvasBuilderGroup from '../../render/canvas/BuilderGroup.js';\nimport CanvasLayerRenderer, {canvasPool} from './Layer.js';\nimport ExecutorGroup from '../../render/canvas/ExecutorGroup.js';\nimport ViewHint from '../../ViewHint.js';\nimport {\n  HIT_DETECT_RESOLUTION,\n  createHitDetectionImageData,\n  hitDetect,\n} from '../../render/canvas/hitdetect.js';\nimport {\n  apply,\n  makeInverse,\n  makeScale,\n  toString as transformToString,\n} from '../../transform.js';\nimport {\n  buffer,\n  containsExtent,\n  createEmpty,\n  getWidth,\n  intersects as intersectsExtent,\n  wrapX as wrapExtentX,\n} from '../../extent.js';\nimport {createCanvasContext2D, releaseCanvas} from '../../dom.js';\nimport {\n  defaultOrder as defaultRenderOrder,\n  getTolerance as getRenderTolerance,\n  getSquaredTolerance as getSquaredRenderTolerance,\n  renderFeature,\n} from '../vector.js';\nimport {equals} from '../../array.js';\nimport {\n  fromUserExtent,\n  getTransformFromProjections,\n  getUserProjection,\n  toUserExtent,\n  toUserResolution,\n} from '../../proj.js';\nimport {getUid} from '../../util.js';\nimport {wrapX as wrapCoordinateX} from '../../coordinate.js';\n\n/**\n * @classdesc\n * Canvas renderer for vector layers.\n * @api\n */\nclass CanvasVectorLayerRenderer extends CanvasLayerRenderer {\n  /**\n   * @param {import(\"../../layer/BaseVector.js\").default} vectorLayer Vector layer.\n   */\n  constructor(vectorLayer) {\n    super(vectorLayer);\n\n    /** @private */\n    this.boundHandleStyleImageChange_ = this.handleStyleImageChange_.bind(this);\n\n    /**\n     * @type {boolean}\n     */\n    this.animatingOrInteracting_;\n\n    /**\n     * @type {ImageData|null}\n     */\n    this.hitDetectionImageData_ = null;\n\n    /**\n     * @type {Array<import(\"../../Feature.js\").default>}\n     */\n    this.renderedFeatures_ = null;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.renderedRevision_ = -1;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.renderedResolution_ = NaN;\n\n    /**\n     * @private\n     * @type {import(\"../../extent.js\").Extent}\n     */\n    this.renderedExtent_ = createEmpty();\n\n    /**\n     * @private\n     * @type {import(\"../../extent.js\").Extent}\n     */\n    this.wrappedRenderedExtent_ = createEmpty();\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.renderedRotation_;\n\n    /**\n     * @private\n     * @type {import(\"../../coordinate\").Coordinate}\n     */\n    this.renderedCenter_ = null;\n\n    /**\n     * @private\n     * @type {import(\"../../proj/Projection\").default}\n     */\n    this.renderedProjection_ = null;\n\n    /**\n     * @private\n     * @type {function(import(\"../../Feature.js\").default, import(\"../../Feature.js\").default): number|null}\n     */\n    this.renderedRenderOrder_ = null;\n\n    /**\n     * @private\n     * @type {import(\"../../render/canvas/ExecutorGroup\").default}\n     */\n    this.replayGroup_ = null;\n\n    /**\n     * A new replay group had to be created by `prepareFrame()`\n     * @type {boolean}\n     */\n    this.replayGroupChanged = true;\n\n    /**\n     * @type {import(\"../../render/canvas/ExecutorGroup\").default}\n     */\n    this.declutterExecutorGroup = null;\n\n    /**\n     * Clipping to be performed by `renderFrame()`\n     * @type {boolean}\n     */\n    this.clipping = true;\n\n    /**\n     * @private\n     * @type {CanvasRenderingContext2D}\n     */\n    this.compositionContext_ = null;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.opacity_ = 1;\n  }\n\n  /**\n   * @param {ExecutorGroup} executorGroup Executor group.\n   * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n   * @param {import(\"rbush\").default} [declutterTree] Declutter tree.\n   */\n  renderWorlds(executorGroup, frameState, declutterTree) {\n    const extent = frameState.extent;\n    const viewState = frameState.viewState;\n    const center = viewState.center;\n    const resolution = viewState.resolution;\n    const projection = viewState.projection;\n    const rotation = viewState.rotation;\n    const projectionExtent = projection.getExtent();\n    const vectorSource = this.getLayer().getSource();\n    const pixelRatio = frameState.pixelRatio;\n    const viewHints = frameState.viewHints;\n    const snapToPixel = !(\n      viewHints[ViewHint.ANIMATING] || viewHints[ViewHint.INTERACTING]\n    );\n    const context = this.compositionContext_;\n    const width = Math.round(frameState.size[0] * pixelRatio);\n    const height = Math.round(frameState.size[1] * pixelRatio);\n\n    const multiWorld = vectorSource.getWrapX() && projection.canWrapX();\n    const worldWidth = multiWorld ? getWidth(projectionExtent) : null;\n    const endWorld = multiWorld\n      ? Math.ceil((extent[2] - projectionExtent[2]) / worldWidth) + 1\n      : 1;\n    let world = multiWorld\n      ? Math.floor((extent[0] - projectionExtent[0]) / worldWidth)\n      : 0;\n    do {\n      const transform = this.getRenderTransform(\n        center,\n        resolution,\n        rotation,\n        pixelRatio,\n        width,\n        height,\n        world * worldWidth\n      );\n      executorGroup.execute(\n        context,\n        1,\n        transform,\n        rotation,\n        snapToPixel,\n        undefined,\n        declutterTree\n      );\n    } while (++world < endWorld);\n  }\n\n  setupCompositionContext_() {\n    if (this.opacity_ !== 1) {\n      const compositionContext = createCanvasContext2D(\n        this.context.canvas.width,\n        this.context.canvas.height,\n        canvasPool\n      );\n      this.compositionContext_ = compositionContext;\n    } else {\n      this.compositionContext_ = this.context;\n    }\n  }\n\n  releaseCompositionContext_() {\n    if (this.opacity_ !== 1) {\n      const alpha = this.context.globalAlpha;\n      this.context.globalAlpha = this.opacity_;\n      this.context.drawImage(this.compositionContext_.canvas, 0, 0);\n      this.context.globalAlpha = alpha;\n      releaseCanvas(this.compositionContext_);\n      canvasPool.push(this.compositionContext_.canvas);\n      this.compositionContext_ = null;\n    }\n  }\n\n  /**\n   * Render declutter items for this layer\n   * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n   */\n  renderDeclutter(frameState) {\n    if (this.declutterExecutorGroup) {\n      this.setupCompositionContext_();\n      this.renderWorlds(\n        this.declutterExecutorGroup,\n        frameState,\n        frameState.declutterTree\n      );\n      this.releaseCompositionContext_();\n    }\n  }\n\n  /**\n   * Render the layer.\n   * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n   * @param {HTMLElement} target Target that may be used to render content to.\n   * @return {HTMLElement} The rendered element.\n   */\n  renderFrame(frameState, target) {\n    const pixelRatio = frameState.pixelRatio;\n    const layerState = frameState.layerStatesArray[frameState.layerIndex];\n\n    // set forward and inverse pixel transforms\n    makeScale(this.pixelTransform, 1 / pixelRatio, 1 / pixelRatio);\n    makeInverse(this.inversePixelTransform, this.pixelTransform);\n\n    const canvasTransform = transformToString(this.pixelTransform);\n\n    this.useContainer(target, canvasTransform, this.getBackground(frameState));\n    const context = this.context;\n    const canvas = context.canvas;\n\n    const replayGroup = this.replayGroup_;\n    const declutterExecutorGroup = this.declutterExecutorGroup;\n    if (\n      (!replayGroup || replayGroup.isEmpty()) &&\n      (!declutterExecutorGroup || declutterExecutorGroup.isEmpty())\n    ) {\n      return null;\n    }\n\n    // resize and clear\n    const width = Math.round(frameState.size[0] * pixelRatio);\n    const height = Math.round(frameState.size[1] * pixelRatio);\n    if (canvas.width != width || canvas.height != height) {\n      canvas.width = width;\n      canvas.height = height;\n      if (canvas.style.transform !== canvasTransform) {\n        canvas.style.transform = canvasTransform;\n      }\n    } else if (!this.containerReused) {\n      context.clearRect(0, 0, width, height);\n    }\n\n    this.preRender(context, frameState);\n\n    const viewState = frameState.viewState;\n    const projection = viewState.projection;\n\n    this.opacity_ = layerState.opacity;\n    this.setupCompositionContext_();\n\n    // clipped rendering if layer extent is set\n    let clipped = false;\n    let render = true;\n    if (layerState.extent && this.clipping) {\n      const layerExtent = fromUserExtent(layerState.extent, projection);\n      render = intersectsExtent(layerExtent, frameState.extent);\n      clipped = render && !containsExtent(layerExtent, frameState.extent);\n      if (clipped) {\n        this.clipUnrotated(this.compositionContext_, frameState, layerExtent);\n      }\n    }\n\n    if (render) {\n      this.renderWorlds(replayGroup, frameState);\n    }\n\n    if (clipped) {\n      this.compositionContext_.restore();\n    }\n\n    this.releaseCompositionContext_();\n\n    this.postRender(context, frameState);\n\n    if (this.renderedRotation_ !== viewState.rotation) {\n      this.renderedRotation_ = viewState.rotation;\n      this.hitDetectionImageData_ = null;\n    }\n    return this.container;\n  }\n\n  /**\n   * Asynchronous layer level hit detection.\n   * @param {import(\"../../pixel.js\").Pixel} pixel Pixel.\n   * @return {Promise<Array<import(\"../../Feature\").default>>} Promise\n   * that resolves with an array of features.\n   */\n  getFeatures(pixel) {\n    return new Promise((resolve) => {\n      if (!this.hitDetectionImageData_ && !this.animatingOrInteracting_) {\n        const size = [this.context.canvas.width, this.context.canvas.height];\n        apply(this.pixelTransform, size);\n        const center = this.renderedCenter_;\n        const resolution = this.renderedResolution_;\n        const rotation = this.renderedRotation_;\n        const projection = this.renderedProjection_;\n        const extent = this.wrappedRenderedExtent_;\n        const layer = this.getLayer();\n        const transforms = [];\n        const width = size[0] * HIT_DETECT_RESOLUTION;\n        const height = size[1] * HIT_DETECT_RESOLUTION;\n        transforms.push(\n          this.getRenderTransform(\n            center,\n            resolution,\n            rotation,\n            HIT_DETECT_RESOLUTION,\n            width,\n            height,\n            0\n          ).slice()\n        );\n        const source = layer.getSource();\n        const projectionExtent = projection.getExtent();\n        if (\n          source.getWrapX() &&\n          projection.canWrapX() &&\n          !containsExtent(projectionExtent, extent)\n        ) {\n          let startX = extent[0];\n          const worldWidth = getWidth(projectionExtent);\n          let world = 0;\n          let offsetX;\n          while (startX < projectionExtent[0]) {\n            --world;\n            offsetX = worldWidth * world;\n            transforms.push(\n              this.getRenderTransform(\n                center,\n                resolution,\n                rotation,\n                HIT_DETECT_RESOLUTION,\n                width,\n                height,\n                offsetX\n              ).slice()\n            );\n            startX += worldWidth;\n          }\n          world = 0;\n          startX = extent[2];\n          while (startX > projectionExtent[2]) {\n            ++world;\n            offsetX = worldWidth * world;\n            transforms.push(\n              this.getRenderTransform(\n                center,\n                resolution,\n                rotation,\n                HIT_DETECT_RESOLUTION,\n                width,\n                height,\n                offsetX\n              ).slice()\n            );\n            startX -= worldWidth;\n          }\n        }\n\n        this.hitDetectionImageData_ = createHitDetectionImageData(\n          size,\n          transforms,\n          this.renderedFeatures_,\n          layer.getStyleFunction(),\n          extent,\n          resolution,\n          rotation\n        );\n      }\n      resolve(\n        hitDetect(pixel, this.renderedFeatures_, this.hitDetectionImageData_)\n      );\n    });\n  }\n\n  /**\n   * @param {import(\"../../coordinate.js\").Coordinate} coordinate Coordinate.\n   * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n   * @param {number} hitTolerance Hit tolerance in pixels.\n   * @param {import(\"../vector.js\").FeatureCallback<T>} callback Feature callback.\n   * @param {Array<import(\"../Map.js\").HitMatch<T>>} matches The hit detected matches with tolerance.\n   * @return {T|undefined} Callback result.\n   * @template T\n   */\n  forEachFeatureAtCoordinate(\n    coordinate,\n    frameState,\n    hitTolerance,\n    callback,\n    matches\n  ) {\n    if (!this.replayGroup_) {\n      return undefined;\n    }\n    const resolution = frameState.viewState.resolution;\n    const rotation = frameState.viewState.rotation;\n    const layer = this.getLayer();\n\n    /** @type {!Object<string, import(\"../Map.js\").HitMatch<T>|true>} */\n    const features = {};\n\n    /**\n     * @param {import(\"../../Feature.js\").FeatureLike} feature Feature.\n     * @param {import(\"../../geom/SimpleGeometry.js\").default} geometry Geometry.\n     * @param {number} distanceSq The squared distance to the click position\n     * @return {T|undefined} Callback result.\n     */\n    const featureCallback = function (feature, geometry, distanceSq) {\n      const key = getUid(feature);\n      const match = features[key];\n      if (!match) {\n        if (distanceSq === 0) {\n          features[key] = true;\n          return callback(feature, layer, geometry);\n        }\n        matches.push(\n          (features[key] = {\n            feature: feature,\n            layer: layer,\n            geometry: geometry,\n            distanceSq: distanceSq,\n            callback: callback,\n          })\n        );\n      } else if (match !== true && distanceSq < match.distanceSq) {\n        if (distanceSq === 0) {\n          features[key] = true;\n          matches.splice(matches.lastIndexOf(match), 1);\n          return callback(feature, layer, geometry);\n        }\n        match.geometry = geometry;\n        match.distanceSq = distanceSq;\n      }\n      return undefined;\n    };\n\n    let result;\n    const executorGroups = [this.replayGroup_];\n    if (this.declutterExecutorGroup) {\n      executorGroups.push(this.declutterExecutorGroup);\n    }\n    executorGroups.some((executorGroup) => {\n      return (result = executorGroup.forEachFeatureAtCoordinate(\n        coordinate,\n        resolution,\n        rotation,\n        hitTolerance,\n        featureCallback,\n        executorGroup === this.declutterExecutorGroup &&\n          frameState.declutterTree\n          ? frameState.declutterTree.all().map((item) => item.value)\n          : null\n      ));\n    });\n\n    return result;\n  }\n\n  /**\n   * Perform action necessary to get the layer rendered after new fonts have loaded\n   */\n  handleFontsChanged() {\n    const layer = this.getLayer();\n    if (layer.getVisible() && this.replayGroup_) {\n      layer.changed();\n    }\n  }\n\n  /**\n   * Handle changes in image style state.\n   * @param {import(\"../../events/Event.js\").default} event Image style change event.\n   * @private\n   */\n  handleStyleImageChange_(event) {\n    this.renderIfReadyAndVisible();\n  }\n\n  /**\n   * Determine whether render should be called.\n   * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n   * @return {boolean} Layer is ready to be rendered.\n   */\n  prepareFrame(frameState) {\n    const vectorLayer = this.getLayer();\n    const vectorSource = vectorLayer.getSource();\n    if (!vectorSource) {\n      return false;\n    }\n\n    const animating = frameState.viewHints[ViewHint.ANIMATING];\n    const interacting = frameState.viewHints[ViewHint.INTERACTING];\n    const updateWhileAnimating = vectorLayer.getUpdateWhileAnimating();\n    const updateWhileInteracting = vectorLayer.getUpdateWhileInteracting();\n\n    if (\n      (this.ready && !updateWhileAnimating && animating) ||\n      (!updateWhileInteracting && interacting)\n    ) {\n      this.animatingOrInteracting_ = true;\n      return true;\n    }\n    this.animatingOrInteracting_ = false;\n\n    const frameStateExtent = frameState.extent;\n    const viewState = frameState.viewState;\n    const projection = viewState.projection;\n    const resolution = viewState.resolution;\n    const pixelRatio = frameState.pixelRatio;\n    const vectorLayerRevision = vectorLayer.getRevision();\n    const vectorLayerRenderBuffer = vectorLayer.getRenderBuffer();\n    let vectorLayerRenderOrder = vectorLayer.getRenderOrder();\n\n    if (vectorLayerRenderOrder === undefined) {\n      vectorLayerRenderOrder = defaultRenderOrder;\n    }\n\n    const center = viewState.center.slice();\n    const extent = buffer(\n      frameStateExtent,\n      vectorLayerRenderBuffer * resolution\n    );\n    const renderedExtent = extent.slice();\n    const loadExtents = [extent.slice()];\n    const projectionExtent = projection.getExtent();\n\n    if (\n      vectorSource.getWrapX() &&\n      projection.canWrapX() &&\n      !containsExtent(projectionExtent, frameState.extent)\n    ) {\n      // For the replay group, we need an extent that intersects the real world\n      // (-180° to +180°). To support geometries in a coordinate range from -540°\n      // to +540°, we add at least 1 world width on each side of the projection\n      // extent. If the viewport is wider than the world, we need to add half of\n      // the viewport width to make sure we cover the whole viewport.\n      const worldWidth = getWidth(projectionExtent);\n      const gutter = Math.max(getWidth(extent) / 2, worldWidth);\n      extent[0] = projectionExtent[0] - gutter;\n      extent[2] = projectionExtent[2] + gutter;\n      wrapCoordinateX(center, projection);\n      const loadExtent = wrapExtentX(loadExtents[0], projection);\n      // If the extent crosses the date line, we load data for both edges of the worlds\n      if (\n        loadExtent[0] < projectionExtent[0] &&\n        loadExtent[2] < projectionExtent[2]\n      ) {\n        loadExtents.push([\n          loadExtent[0] + worldWidth,\n          loadExtent[1],\n          loadExtent[2] + worldWidth,\n          loadExtent[3],\n        ]);\n      } else if (\n        loadExtent[0] > projectionExtent[0] &&\n        loadExtent[2] > projectionExtent[2]\n      ) {\n        loadExtents.push([\n          loadExtent[0] - worldWidth,\n          loadExtent[1],\n          loadExtent[2] - worldWidth,\n          loadExtent[3],\n        ]);\n      }\n    }\n\n    if (\n      this.ready &&\n      this.renderedResolution_ == resolution &&\n      this.renderedRevision_ == vectorLayerRevision &&\n      this.renderedRenderOrder_ == vectorLayerRenderOrder &&\n      containsExtent(this.wrappedRenderedExtent_, extent)\n    ) {\n      if (!equals(this.renderedExtent_, renderedExtent)) {\n        this.hitDetectionImageData_ = null;\n        this.renderedExtent_ = renderedExtent;\n      }\n      this.renderedCenter_ = center;\n      this.replayGroupChanged = false;\n      return true;\n    }\n\n    this.replayGroup_ = null;\n\n    const replayGroup = new CanvasBuilderGroup(\n      getRenderTolerance(resolution, pixelRatio),\n      extent,\n      resolution,\n      pixelRatio\n    );\n\n    let declutterBuilderGroup;\n    if (this.getLayer().getDeclutter()) {\n      declutterBuilderGroup = new CanvasBuilderGroup(\n        getRenderTolerance(resolution, pixelRatio),\n        extent,\n        resolution,\n        pixelRatio\n      );\n    }\n\n    const userProjection = getUserProjection();\n    let userTransform;\n    if (userProjection) {\n      for (let i = 0, ii = loadExtents.length; i < ii; ++i) {\n        const extent = loadExtents[i];\n        const userExtent = toUserExtent(extent, projection);\n        vectorSource.loadFeatures(\n          userExtent,\n          toUserResolution(resolution, projection),\n          userProjection\n        );\n      }\n      userTransform = getTransformFromProjections(userProjection, projection);\n    } else {\n      for (let i = 0, ii = loadExtents.length; i < ii; ++i) {\n        vectorSource.loadFeatures(loadExtents[i], resolution, projection);\n      }\n    }\n\n    const squaredTolerance = getSquaredRenderTolerance(resolution, pixelRatio);\n    let ready = true;\n    const render =\n      /**\n       * @param {import(\"../../Feature.js\").default} feature Feature.\n       */\n      (feature) => {\n        let styles;\n        const styleFunction =\n          feature.getStyleFunction() || vectorLayer.getStyleFunction();\n        if (styleFunction) {\n          styles = styleFunction(feature, resolution);\n        }\n        if (styles) {\n          const dirty = this.renderFeature(\n            feature,\n            squaredTolerance,\n            styles,\n            replayGroup,\n            userTransform,\n            declutterBuilderGroup\n          );\n          ready = ready && !dirty;\n        }\n      };\n\n    const userExtent = toUserExtent(extent, projection);\n    /** @type {Array<import(\"../../Feature.js\").default>} */\n    const features = vectorSource.getFeaturesInExtent(userExtent);\n    if (vectorLayerRenderOrder) {\n      features.sort(vectorLayerRenderOrder);\n    }\n    for (let i = 0, ii = features.length; i < ii; ++i) {\n      render(features[i]);\n    }\n    this.renderedFeatures_ = features;\n    this.ready = ready;\n\n    const replayGroupInstructions = replayGroup.finish();\n    const executorGroup = new ExecutorGroup(\n      extent,\n      resolution,\n      pixelRatio,\n      vectorSource.getOverlaps(),\n      replayGroupInstructions,\n      vectorLayer.getRenderBuffer()\n    );\n\n    if (declutterBuilderGroup) {\n      this.declutterExecutorGroup = new ExecutorGroup(\n        extent,\n        resolution,\n        pixelRatio,\n        vectorSource.getOverlaps(),\n        declutterBuilderGroup.finish(),\n        vectorLayer.getRenderBuffer()\n      );\n    }\n\n    this.renderedResolution_ = resolution;\n    this.renderedRevision_ = vectorLayerRevision;\n    this.renderedRenderOrder_ = vectorLayerRenderOrder;\n    this.renderedExtent_ = renderedExtent;\n    this.wrappedRenderedExtent_ = extent;\n    this.renderedCenter_ = center;\n    this.renderedProjection_ = projection;\n    this.replayGroup_ = executorGroup;\n    this.hitDetectionImageData_ = null;\n\n    this.replayGroupChanged = true;\n    return true;\n  }\n\n  /**\n   * @param {import(\"../../Feature.js\").default} feature Feature.\n   * @param {number} squaredTolerance Squared render tolerance.\n   * @param {import(\"../../style/Style.js\").default|Array<import(\"../../style/Style.js\").default>} styles The style or array of styles.\n   * @param {import(\"../../render/canvas/BuilderGroup.js\").default} builderGroup Builder group.\n   * @param {import(\"../../proj.js\").TransformFunction} [transform] Transform from user to view projection.\n   * @param {import(\"../../render/canvas/BuilderGroup.js\").default} [declutterBuilderGroup] Builder for decluttering.\n   * @return {boolean} `true` if an image is loading.\n   */\n  renderFeature(\n    feature,\n    squaredTolerance,\n    styles,\n    builderGroup,\n    transform,\n    declutterBuilderGroup\n  ) {\n    if (!styles) {\n      return false;\n    }\n    let loading = false;\n    if (Array.isArray(styles)) {\n      for (let i = 0, ii = styles.length; i < ii; ++i) {\n        loading =\n          renderFeature(\n            builderGroup,\n            feature,\n            styles[i],\n            squaredTolerance,\n            this.boundHandleStyleImageChange_,\n            transform,\n            declutterBuilderGroup\n          ) || loading;\n      }\n    } else {\n      loading = renderFeature(\n        builderGroup,\n        feature,\n        styles,\n        squaredTolerance,\n        this.boundHandleStyleImageChange_,\n        transform,\n        declutterBuilderGroup\n      );\n    }\n    return loading;\n  }\n}\n\nexport default CanvasVectorLayerRenderer;\n","/**\n * @module ol/renderer/canvas/VectorImageLayer\n */\nimport CanvasImageLayerRenderer from './ImageLayer.js';\nimport CanvasVectorLayerRenderer from './VectorLayer.js';\nimport EventType from '../../events/EventType.js';\nimport ImageCanvas from '../../ImageCanvas.js';\nimport ImageState from '../../ImageState.js';\nimport RBush from 'rbush';\nimport ViewHint from '../../ViewHint.js';\nimport {apply, compose, create} from '../../transform.js';\nimport {getHeight, getWidth, isEmpty, scaleFromCenter} from '../../extent.js';\n\n/**\n * @classdesc\n * Canvas renderer for image layers.\n * @api\n */\nclass CanvasVectorImageLayerRenderer extends CanvasImageLayerRenderer {\n  /**\n   * @param {import(\"../../layer/VectorImage.js\").default} layer Vector image layer.\n   */\n  constructor(layer) {\n    super(layer);\n\n    /**\n     * @private\n     * @type {import(\"./VectorLayer.js\").default}\n     */\n    this.vectorRenderer_ = new CanvasVectorLayerRenderer(layer);\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.layerImageRatio_ = layer.getImageRatio();\n\n    /**\n     * @private\n     * @type {import(\"../../transform.js\").Transform}\n     */\n    this.coordinateToVectorPixelTransform_ = create();\n\n    /**\n     * @private\n     * @type {import(\"../../transform.js\").Transform}\n     */\n    this.renderedPixelToCoordinateTransform_ = null;\n  }\n\n  /**\n   * Clean up.\n   */\n  disposeInternal() {\n    this.vectorRenderer_.dispose();\n    super.disposeInternal();\n  }\n\n  /**\n   * Asynchronous layer level hit detection.\n   * @param {import(\"../../pixel.js\").Pixel} pixel Pixel.\n   * @return {Promise<Array<import(\"../../Feature\").default>>} Promise that resolves with an array of features.\n   */\n  getFeatures(pixel) {\n    if (!this.vectorRenderer_) {\n      return Promise.resolve([]);\n    }\n    const vectorPixel = apply(\n      this.coordinateToVectorPixelTransform_,\n      apply(this.renderedPixelToCoordinateTransform_, pixel.slice())\n    );\n    return this.vectorRenderer_.getFeatures(vectorPixel);\n  }\n\n  /**\n   * Perform action necessary to get the layer rendered after new fonts have loaded\n   */\n  handleFontsChanged() {\n    this.vectorRenderer_.handleFontsChanged();\n  }\n\n  /**\n   * Determine whether render should be called.\n   * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n   * @return {boolean} Layer is ready to be rendered.\n   */\n  prepareFrame(frameState) {\n    const pixelRatio = frameState.pixelRatio;\n    const viewState = frameState.viewState;\n    const viewResolution = viewState.resolution;\n\n    const hints = frameState.viewHints;\n    const vectorRenderer = this.vectorRenderer_;\n    let renderedExtent = frameState.extent;\n    if (this.layerImageRatio_ !== 1) {\n      renderedExtent = renderedExtent.slice(0);\n      scaleFromCenter(renderedExtent, this.layerImageRatio_);\n    }\n    const width = getWidth(renderedExtent) / viewResolution;\n    const height = getHeight(renderedExtent) / viewResolution;\n\n    if (\n      !hints[ViewHint.ANIMATING] &&\n      !hints[ViewHint.INTERACTING] &&\n      !isEmpty(renderedExtent)\n    ) {\n      vectorRenderer.useContainer(null, null);\n      const context = vectorRenderer.context;\n      const layerState = frameState.layerStatesArray[frameState.layerIndex];\n      const imageLayerState = Object.assign({}, layerState, {opacity: 1});\n      const imageFrameState = /** @type {import(\"../../Map.js\").FrameState} */ (\n        Object.assign({}, frameState, {\n          declutterTree: new RBush(9),\n          extent: renderedExtent,\n          size: [width, height],\n          viewState: /** @type {import(\"../../View.js\").State} */ (\n            Object.assign({}, frameState.viewState, {\n              rotation: 0,\n            })\n          ),\n          layerStatesArray: [imageLayerState],\n          layerIndex: 0,\n        })\n      );\n      let emptyImage = true;\n      const image = new ImageCanvas(\n        renderedExtent,\n        viewResolution,\n        pixelRatio,\n        context.canvas,\n        function (callback) {\n          if (\n            vectorRenderer.prepareFrame(imageFrameState) &&\n            vectorRenderer.replayGroupChanged\n          ) {\n            vectorRenderer.clipping = false;\n            if (vectorRenderer.renderFrame(imageFrameState, null)) {\n              vectorRenderer.renderDeclutter(imageFrameState);\n              emptyImage = false;\n            }\n            callback();\n          }\n        }\n      );\n\n      image.addEventListener(EventType.CHANGE, () => {\n        if (image.getState() !== ImageState.LOADED) {\n          return;\n        }\n        this.image_ = emptyImage ? null : image;\n        const imageResolution = image.getResolution();\n        const imagePixelRatio = image.getPixelRatio();\n        const renderedResolution =\n          (imageResolution * pixelRatio) / imagePixelRatio;\n        this.renderedResolution = renderedResolution;\n        this.coordinateToVectorPixelTransform_ = compose(\n          this.coordinateToVectorPixelTransform_,\n          width / 2,\n          height / 2,\n          1 / renderedResolution,\n          -1 / renderedResolution,\n          0,\n          -viewState.center[0],\n          -viewState.center[1]\n        );\n      });\n      image.load();\n    }\n\n    if (this.image_) {\n      this.renderedPixelToCoordinateTransform_ =\n        frameState.pixelToCoordinateTransform.slice();\n    }\n\n    return !!this.image_;\n  }\n\n  /**\n   */\n  preRender() {}\n\n  /**\n   */\n  postRender() {}\n\n  /**\n   */\n  renderDeclutter() {}\n\n  /**\n   * @param {import(\"../../coordinate.js\").Coordinate} coordinate Coordinate.\n   * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n   * @param {number} hitTolerance Hit tolerance in pixels.\n   * @param {import(\"../vector.js\").FeatureCallback<T>} callback Feature callback.\n   * @param {Array<import(\"../Map.js\").HitMatch<T>>} matches The hit detected matches with tolerance.\n   * @return {T|undefined} Callback result.\n   * @template T\n   */\n  forEachFeatureAtCoordinate(\n    coordinate,\n    frameState,\n    hitTolerance,\n    callback,\n    matches\n  ) {\n    if (this.vectorRenderer_) {\n      return this.vectorRenderer_.forEachFeatureAtCoordinate(\n        coordinate,\n        frameState,\n        hitTolerance,\n        callback,\n        matches\n      );\n    }\n    return super.forEachFeatureAtCoordinate(\n      coordinate,\n      frameState,\n      hitTolerance,\n      callback,\n      matches\n    );\n  }\n}\n\nexport default CanvasVectorImageLayerRenderer;\n","/**\n * @module ol/renderer/canvas/VectorTileLayer\n */\nimport CanvasBuilderGroup from '../../render/canvas/BuilderGroup.js';\nimport CanvasExecutorGroup from '../../render/canvas/ExecutorGroup.js';\nimport CanvasTileLayerRenderer from './TileLayer.js';\nimport TileState from '../../TileState.js';\nimport ViewHint from '../../ViewHint.js';\nimport {\n  HIT_DETECT_RESOLUTION,\n  createHitDetectionImageData,\n  hitDetect,\n} from '../../render/canvas/hitdetect.js';\nimport {\n  apply as applyTransform,\n  create as createTransform,\n  multiply,\n  reset as resetTransform,\n  scale,\n  scale as scaleTransform,\n  translate as translateTransform,\n} from '../../transform.js';\nimport {\n  boundingExtent,\n  buffer,\n  containsExtent,\n  equals,\n  getIntersection,\n  getTopLeft,\n  intersects,\n} from '../../extent.js';\nimport {\n  getSquaredTolerance as getSquaredRenderTolerance,\n  renderFeature,\n} from '../vector.js';\nimport {getUid} from '../../util.js';\nimport {toSize} from '../../size.js';\nimport {wrapX} from '../../coordinate.js';\n\n/**\n * @type {!Object<string, Array<import(\"../../render/canvas.js\").BuilderType>>}\n */\nconst IMAGE_REPLAYS = {\n  'image': ['Polygon', 'Circle', 'LineString', 'Image', 'Text'],\n  'hybrid': ['Polygon', 'LineString'],\n  'vector': [],\n};\n\n/**\n * @type {!Object<string, Array<import(\"../../render/canvas.js\").BuilderType>>}\n */\nconst VECTOR_REPLAYS = {\n  'hybrid': ['Image', 'Text', 'Default'],\n  'vector': ['Polygon', 'Circle', 'LineString', 'Image', 'Text', 'Default'],\n};\n\n/**\n * @classdesc\n * Canvas renderer for vector tile layers.\n * @api\n * @extends {CanvasTileLayerRenderer<import(\"../../layer/VectorTile.js\").default>}\n */\nclass CanvasVectorTileLayerRenderer extends CanvasTileLayerRenderer {\n  /**\n   * @param {import(\"../../layer/VectorTile.js\").default} layer VectorTile layer.\n   */\n  constructor(layer) {\n    super(layer);\n\n    /** @private */\n    this.boundHandleStyleImageChange_ = this.handleStyleImageChange_.bind(this);\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.renderedLayerRevision_;\n\n    /**\n     * @private\n     * @type {import(\"../../transform\").Transform}\n     */\n    this.renderedPixelToCoordinateTransform_ = null;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.renderedRotation_;\n\n    /**\n     * @private\n     * @type {import(\"../../transform.js\").Transform}\n     */\n    this.tmpTransform_ = createTransform();\n  }\n\n  /**\n   * @param {import(\"../../VectorRenderTile.js\").default} tile Tile.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {import(\"../../proj/Projection\").default} projection Projection.\n   * @return {boolean|undefined} Tile needs to be rendered.\n   */\n  prepareTile(tile, pixelRatio, projection) {\n    let render;\n    const state = tile.getState();\n    if (state === TileState.LOADED || state === TileState.ERROR) {\n      this.updateExecutorGroup_(tile, pixelRatio, projection);\n      if (this.tileImageNeedsRender_(tile)) {\n        render = true;\n      }\n    }\n    return render;\n  }\n\n  /**\n   * @param {number} z Tile coordinate z.\n   * @param {number} x Tile coordinate x.\n   * @param {number} y Tile coordinate y.\n   * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n   * @return {!import(\"../../Tile.js\").default} Tile.\n   */\n  getTile(z, x, y, frameState) {\n    const pixelRatio = frameState.pixelRatio;\n    const viewState = frameState.viewState;\n    const resolution = viewState.resolution;\n    const projection = viewState.projection;\n    const layer = this.getLayer();\n    const tile = layer.getSource().getTile(z, x, y, pixelRatio, projection);\n    const viewHints = frameState.viewHints;\n    const hifi = !(\n      viewHints[ViewHint.ANIMATING] || viewHints[ViewHint.INTERACTING]\n    );\n    if (hifi || !tile.wantedResolution) {\n      tile.wantedResolution = resolution;\n    }\n    const render = this.prepareTile(tile, pixelRatio, projection);\n    if (\n      render &&\n      (hifi || Date.now() - frameState.time < 8) &&\n      layer.getRenderMode() !== 'vector'\n    ) {\n      this.renderTileImage_(tile, frameState);\n    }\n    return super.getTile(z, x, y, frameState);\n  }\n\n  /**\n   * @param {import(\"../../VectorRenderTile.js\").default} tile Tile.\n   * @return {boolean} Tile is drawable.\n   */\n  isDrawableTile(tile) {\n    const layer = this.getLayer();\n    return (\n      super.isDrawableTile(tile) &&\n      (layer.getRenderMode() === 'vector'\n        ? getUid(layer) in tile.executorGroups\n        : tile.hasContext(layer))\n    );\n  }\n\n  /**\n   * @inheritDoc\n   */\n  getTileImage(tile) {\n    return tile.getImage(this.getLayer());\n  }\n\n  /**\n   * Determine whether render should be called.\n   * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n   * @return {boolean} Layer is ready to be rendered.\n   */\n  prepareFrame(frameState) {\n    const layerRevision = this.getLayer().getRevision();\n    if (this.renderedLayerRevision_ !== layerRevision) {\n      this.renderedLayerRevision_ = layerRevision;\n      this.renderedTiles.length = 0;\n    }\n    return super.prepareFrame(frameState);\n  }\n\n  /**\n   * @param {import(\"../../VectorRenderTile.js\").default} tile Tile.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {import(\"../../proj/Projection.js\").default} projection Projection.\n   * @private\n   */\n  updateExecutorGroup_(tile, pixelRatio, projection) {\n    const layer = /** @type {import(\"../../layer/VectorTile.js\").default} */ (\n      this.getLayer()\n    );\n    const revision = layer.getRevision();\n    const renderOrder = layer.getRenderOrder() || null;\n\n    const resolution = tile.wantedResolution;\n    const builderState = tile.getReplayState(layer);\n    if (\n      !builderState.dirty &&\n      builderState.renderedResolution === resolution &&\n      builderState.renderedRevision == revision &&\n      builderState.renderedRenderOrder == renderOrder\n    ) {\n      return;\n    }\n\n    const source = layer.getSource();\n    const declutter = layer.getDeclutter();\n    const sourceTileGrid = source.getTileGrid();\n    const tileGrid = source.getTileGridForProjection(projection);\n    const tileExtent = tileGrid.getTileCoordExtent(tile.wrappedTileCoord);\n\n    const sourceTiles = source.getSourceTiles(pixelRatio, projection, tile);\n    const layerUid = getUid(layer);\n    delete tile.hitDetectionImageData[layerUid];\n    tile.executorGroups[layerUid] = [];\n    if (declutter) {\n      tile.declutterExecutorGroups[layerUid] = [];\n    }\n    builderState.dirty = false;\n    for (let t = 0, tt = sourceTiles.length; t < tt; ++t) {\n      const sourceTile = sourceTiles[t];\n      if (sourceTile.getState() != TileState.LOADED) {\n        continue;\n      }\n      const sourceTileCoord = sourceTile.tileCoord;\n      const sourceTileExtent =\n        sourceTileGrid.getTileCoordExtent(sourceTileCoord);\n      const sharedExtent = getIntersection(tileExtent, sourceTileExtent);\n      const builderExtent = buffer(\n        sharedExtent,\n        layer.getRenderBuffer() * resolution,\n        this.tmpExtent\n      );\n      const bufferedExtent = equals(sourceTileExtent, sharedExtent)\n        ? null\n        : builderExtent;\n      const builderGroup = new CanvasBuilderGroup(\n        0,\n        builderExtent,\n        resolution,\n        pixelRatio\n      );\n      const declutterBuilderGroup = declutter\n        ? new CanvasBuilderGroup(0, sharedExtent, resolution, pixelRatio)\n        : undefined;\n      const squaredTolerance = getSquaredRenderTolerance(\n        resolution,\n        pixelRatio\n      );\n\n      /**\n       * @param {import(\"../../Feature.js\").FeatureLike} feature Feature.\n       * @this {CanvasVectorTileLayerRenderer}\n       */\n      const render = function (feature) {\n        let styles;\n        const styleFunction =\n          feature.getStyleFunction() || layer.getStyleFunction();\n        if (styleFunction) {\n          styles = styleFunction(feature, resolution);\n        }\n        if (styles) {\n          const dirty = this.renderFeature(\n            feature,\n            squaredTolerance,\n            styles,\n            builderGroup,\n            declutterBuilderGroup\n          );\n          builderState.dirty = builderState.dirty || dirty;\n        }\n      };\n\n      const features = sourceTile.getFeatures();\n      if (renderOrder && renderOrder !== builderState.renderedRenderOrder) {\n        features.sort(renderOrder);\n      }\n      for (let i = 0, ii = features.length; i < ii; ++i) {\n        const feature = features[i];\n        if (\n          !bufferedExtent ||\n          intersects(bufferedExtent, feature.getGeometry().getExtent())\n        ) {\n          render.call(this, feature);\n        }\n      }\n      const executorGroupInstructions = builderGroup.finish();\n      // no need to clip when the render tile is covered by a single source tile\n      const replayExtent =\n        layer.getRenderMode() !== 'vector' &&\n        declutter &&\n        sourceTiles.length === 1\n          ? null\n          : sharedExtent;\n      const renderingReplayGroup = new CanvasExecutorGroup(\n        replayExtent,\n        resolution,\n        pixelRatio,\n        source.getOverlaps(),\n        executorGroupInstructions,\n        layer.getRenderBuffer()\n      );\n      tile.executorGroups[layerUid].push(renderingReplayGroup);\n      if (declutterBuilderGroup) {\n        const declutterExecutorGroup = new CanvasExecutorGroup(\n          null,\n          resolution,\n          pixelRatio,\n          source.getOverlaps(),\n          declutterBuilderGroup.finish(),\n          layer.getRenderBuffer()\n        );\n        tile.declutterExecutorGroups[layerUid].push(declutterExecutorGroup);\n      }\n    }\n    builderState.renderedRevision = revision;\n    builderState.renderedRenderOrder = renderOrder;\n    builderState.renderedResolution = resolution;\n  }\n\n  /**\n   * @param {import(\"../../coordinate.js\").Coordinate} coordinate Coordinate.\n   * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n   * @param {number} hitTolerance Hit tolerance in pixels.\n   * @param {import(\"../vector.js\").FeatureCallback<T>} callback Feature callback.\n   * @param {Array<import(\"../Map.js\").HitMatch<T>>} matches The hit detected matches with tolerance.\n   * @return {T|undefined} Callback result.\n   * @template T\n   */\n  forEachFeatureAtCoordinate(\n    coordinate,\n    frameState,\n    hitTolerance,\n    callback,\n    matches\n  ) {\n    const resolution = frameState.viewState.resolution;\n    const rotation = frameState.viewState.rotation;\n    hitTolerance = hitTolerance == undefined ? 0 : hitTolerance;\n    const layer = this.getLayer();\n    const source = layer.getSource();\n    const tileGrid = source.getTileGridForProjection(\n      frameState.viewState.projection\n    );\n\n    const hitExtent = boundingExtent([coordinate]);\n    buffer(hitExtent, resolution * hitTolerance, hitExtent);\n\n    /** @type {!Object<string, import(\"../Map.js\").HitMatch<T>|true>} */\n    const features = {};\n\n    /**\n     * @param {import(\"../../Feature.js\").FeatureLike} feature Feature.\n     * @param {import(\"../../geom/SimpleGeometry.js\").default} geometry Geometry.\n     * @param {number} distanceSq The squared distance to the click position.\n     * @return {T|undefined} Callback result.\n     */\n    const featureCallback = function (feature, geometry, distanceSq) {\n      let key = feature.getId();\n      if (key === undefined) {\n        key = getUid(feature);\n      }\n      const match = features[key];\n      if (!match) {\n        if (distanceSq === 0) {\n          features[key] = true;\n          return callback(feature, layer, geometry);\n        }\n        matches.push(\n          (features[key] = {\n            feature: feature,\n            layer: layer,\n            geometry: geometry,\n            distanceSq: distanceSq,\n            callback: callback,\n          })\n        );\n      } else if (match !== true && distanceSq < match.distanceSq) {\n        if (distanceSq === 0) {\n          features[key] = true;\n          matches.splice(matches.lastIndexOf(match), 1);\n          return callback(feature, layer, geometry);\n        }\n        match.geometry = geometry;\n        match.distanceSq = distanceSq;\n      }\n      return undefined;\n    };\n\n    const renderedTiles =\n      /** @type {Array<import(\"../../VectorRenderTile.js\").default>} */ (\n        this.renderedTiles\n      );\n\n    let found;\n    for (let i = 0, ii = renderedTiles.length; !found && i < ii; ++i) {\n      const tile = renderedTiles[i];\n      const tileExtent = tileGrid.getTileCoordExtent(tile.wrappedTileCoord);\n      if (!intersects(tileExtent, hitExtent)) {\n        continue;\n      }\n\n      const layerUid = getUid(layer);\n      const executorGroups = [tile.executorGroups[layerUid]];\n      const declutterExecutorGroups = tile.declutterExecutorGroups[layerUid];\n      if (declutterExecutorGroups) {\n        executorGroups.push(declutterExecutorGroups);\n      }\n      executorGroups.some((executorGroups) => {\n        const declutteredFeatures =\n          executorGroups === declutterExecutorGroups\n            ? frameState.declutterTree.all().map((item) => item.value)\n            : null;\n        for (let t = 0, tt = executorGroups.length; t < tt; ++t) {\n          const executorGroup = executorGroups[t];\n          found = executorGroup.forEachFeatureAtCoordinate(\n            coordinate,\n            resolution,\n            rotation,\n            hitTolerance,\n            featureCallback,\n            declutteredFeatures\n          );\n          if (found) {\n            return true;\n          }\n        }\n      });\n    }\n    return found;\n  }\n\n  /**\n   * Asynchronous layer level hit detection.\n   * @param {import(\"../../pixel.js\").Pixel} pixel Pixel.\n   * @return {Promise<Array<import(\"../../Feature.js\").FeatureLike>>} Promise that resolves with an array of features.\n   */\n  getFeatures(pixel) {\n    return new Promise((resolve, reject) => {\n      const layer = this.getLayer();\n      const layerUid = getUid(layer);\n      const source = layer.getSource();\n      const projection = this.renderedProjection;\n      const projectionExtent = projection.getExtent();\n      const resolution = this.renderedResolution;\n      const tileGrid = source.getTileGridForProjection(projection);\n      const coordinate = applyTransform(\n        this.renderedPixelToCoordinateTransform_,\n        pixel.slice()\n      );\n      const tileCoord = tileGrid.getTileCoordForCoordAndResolution(\n        coordinate,\n        resolution\n      );\n      /** @type {import(\"../../VectorRenderTile.js\").default|undefined} */\n      let tile;\n      for (let i = 0, ii = this.renderedTiles.length; i < ii; ++i) {\n        if (\n          tileCoord.toString() === this.renderedTiles[i].tileCoord.toString()\n        ) {\n          tile = /** @type {import(\"../../VectorRenderTile.js\").default} */ (\n            this.renderedTiles[i]\n          );\n          if (tile.getState() === TileState.LOADED) {\n            const extent = tileGrid.getTileCoordExtent(tile.tileCoord);\n            if (\n              source.getWrapX() &&\n              projection.canWrapX() &&\n              !containsExtent(projectionExtent, extent)\n            ) {\n              wrapX(coordinate, projection);\n            }\n            break;\n          }\n          tile = undefined;\n        }\n      }\n      if (!tile || tile.loadingSourceTiles > 0) {\n        resolve([]);\n        return;\n      }\n      const extent = tileGrid.getTileCoordExtent(tile.wrappedTileCoord);\n      const corner = getTopLeft(extent);\n      const tilePixel = [\n        (coordinate[0] - corner[0]) / resolution,\n        (corner[1] - coordinate[1]) / resolution,\n      ];\n      /** @type {Array<import(\"../../Feature.js\").FeatureLike>} */\n      const features = tile\n        .getSourceTiles()\n        .reduce(function (accumulator, sourceTile) {\n          return accumulator.concat(sourceTile.getFeatures());\n        }, []);\n      /** @type {ImageData|undefined} */\n      let hitDetectionImageData = tile.hitDetectionImageData[layerUid];\n      if (!hitDetectionImageData) {\n        const tileSize = toSize(\n          tileGrid.getTileSize(\n            tileGrid.getZForResolution(resolution, source.zDirection)\n          )\n        );\n        const rotation = this.renderedRotation_;\n        const transforms = [\n          this.getRenderTransform(\n            tileGrid.getTileCoordCenter(tile.wrappedTileCoord),\n            resolution,\n            0,\n            HIT_DETECT_RESOLUTION,\n            tileSize[0] * HIT_DETECT_RESOLUTION,\n            tileSize[1] * HIT_DETECT_RESOLUTION,\n            0\n          ),\n        ];\n        hitDetectionImageData = createHitDetectionImageData(\n          tileSize,\n          transforms,\n          features,\n          layer.getStyleFunction(),\n          tileGrid.getTileCoordExtent(tile.wrappedTileCoord),\n          tile.getReplayState(layer).renderedResolution,\n          rotation\n        );\n        tile.hitDetectionImageData[layerUid] = hitDetectionImageData;\n      }\n      resolve(hitDetect(tilePixel, features, hitDetectionImageData));\n    });\n  }\n\n  /**\n   * Perform action necessary to get the layer rendered after new fonts have loaded\n   */\n  handleFontsChanged() {\n    const layer = this.getLayer();\n    if (layer.getVisible() && this.renderedLayerRevision_ !== undefined) {\n      layer.changed();\n    }\n  }\n\n  /**\n   * Handle changes in image style state.\n   * @param {import(\"../../events/Event.js\").default} event Image style change event.\n   * @private\n   */\n  handleStyleImageChange_(event) {\n    this.renderIfReadyAndVisible();\n  }\n\n  /**\n   * Render declutter items for this layer\n   * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n   */\n  renderDeclutter(frameState) {\n    const context = this.context;\n    const alpha = context.globalAlpha;\n    context.globalAlpha = this.getLayer().getOpacity();\n    const viewHints = frameState.viewHints;\n    const hifi = !(\n      viewHints[ViewHint.ANIMATING] || viewHints[ViewHint.INTERACTING]\n    );\n    const tiles =\n      /** @type {Array<import(\"../../VectorRenderTile.js\").default>} */ (\n        this.renderedTiles\n      );\n    for (let i = 0, ii = tiles.length; i < ii; ++i) {\n      const tile = tiles[i];\n      const declutterExecutorGroups =\n        tile.declutterExecutorGroups[getUid(this.getLayer())];\n      if (declutterExecutorGroups) {\n        for (let j = declutterExecutorGroups.length - 1; j >= 0; --j) {\n          declutterExecutorGroups[j].execute(\n            this.context,\n            1,\n            this.getTileRenderTransform(tile, frameState),\n            frameState.viewState.rotation,\n            hifi,\n            undefined,\n            frameState.declutterTree\n          );\n        }\n      }\n    }\n    context.globalAlpha = alpha;\n  }\n\n  getTileRenderTransform(tile, frameState) {\n    const pixelRatio = frameState.pixelRatio;\n    const viewState = frameState.viewState;\n    const center = viewState.center;\n    const resolution = viewState.resolution;\n    const rotation = viewState.rotation;\n    const size = frameState.size;\n    const width = Math.round(size[0] * pixelRatio);\n    const height = Math.round(size[1] * pixelRatio);\n\n    const source = this.getLayer().getSource();\n    const tileGrid = source.getTileGridForProjection(\n      frameState.viewState.projection\n    );\n    const tileCoord = tile.tileCoord;\n    const tileExtent = tileGrid.getTileCoordExtent(tile.wrappedTileCoord);\n    const worldOffset =\n      tileGrid.getTileCoordExtent(tileCoord, this.tmpExtent)[0] - tileExtent[0];\n    const transform = multiply(\n      scale(this.inversePixelTransform.slice(), 1 / pixelRatio, 1 / pixelRatio),\n      this.getRenderTransform(\n        center,\n        resolution,\n        rotation,\n        pixelRatio,\n        width,\n        height,\n        worldOffset\n      )\n    );\n    return transform;\n  }\n\n  /**\n   * Render the vectors for this layer.\n   * @param {CanvasRenderingContext2D} context Target context.\n   * @param {import(\"../../Map.js\").FrameState} frameState Frame state.\n   */\n  postRender(context, frameState) {\n    const viewHints = frameState.viewHints;\n    const hifi = !(\n      viewHints[ViewHint.ANIMATING] || viewHints[ViewHint.INTERACTING]\n    );\n\n    this.renderedPixelToCoordinateTransform_ =\n      frameState.pixelToCoordinateTransform.slice();\n    this.renderedRotation_ = frameState.viewState.rotation;\n\n    const layer = /** @type {import(\"../../layer/VectorTile.js\").default} */ (\n      this.getLayer()\n    );\n    const renderMode = layer.getRenderMode();\n    const alpha = context.globalAlpha;\n    context.globalAlpha = layer.getOpacity();\n    const replayTypes = VECTOR_REPLAYS[renderMode];\n    const viewState = frameState.viewState;\n    const rotation = viewState.rotation;\n    const tileSource = layer.getSource();\n    const tileGrid = tileSource.getTileGridForProjection(viewState.projection);\n    const z = tileGrid.getZForResolution(\n      viewState.resolution,\n      tileSource.zDirection\n    );\n\n    const tiles = this.renderedTiles;\n    const clips = [];\n    const clipZs = [];\n    let ready = true;\n    for (let i = tiles.length - 1; i >= 0; --i) {\n      const tile = /** @type {import(\"../../VectorRenderTile.js\").default} */ (\n        tiles[i]\n      );\n      ready = ready && !tile.getReplayState(layer).dirty;\n      const executorGroups = tile.executorGroups[getUid(layer)].filter(\n        (group) => group.hasExecutors(replayTypes)\n      );\n      if (executorGroups.length === 0) {\n        continue;\n      }\n      const transform = this.getTileRenderTransform(tile, frameState);\n      const currentZ = tile.tileCoord[0];\n      let contextSaved = false;\n      // Clip mask for regions in this tile that already filled by a higher z tile\n      const currentClip = executorGroups[0].getClipCoords(transform);\n      if (currentClip) {\n        for (let j = 0, jj = clips.length; j < jj; ++j) {\n          if (z !== currentZ && currentZ < clipZs[j]) {\n            const clip = clips[j];\n            if (\n              intersects(\n                [\n                  currentClip[0],\n                  currentClip[3],\n                  currentClip[4],\n                  currentClip[7],\n                ],\n                [clip[0], clip[3], clip[4], clip[7]]\n              )\n            ) {\n              if (!contextSaved) {\n                context.save();\n                contextSaved = true;\n              }\n              context.beginPath();\n              // counter-clockwise (outer ring) for current tile\n              context.moveTo(currentClip[0], currentClip[1]);\n              context.lineTo(currentClip[2], currentClip[3]);\n              context.lineTo(currentClip[4], currentClip[5]);\n              context.lineTo(currentClip[6], currentClip[7]);\n              // clockwise (inner ring) for higher z tile\n              context.moveTo(clip[6], clip[7]);\n              context.lineTo(clip[4], clip[5]);\n              context.lineTo(clip[2], clip[3]);\n              context.lineTo(clip[0], clip[1]);\n              context.clip();\n            }\n          }\n        }\n        clips.push(currentClip);\n        clipZs.push(currentZ);\n      }\n      for (let t = 0, tt = executorGroups.length; t < tt; ++t) {\n        const executorGroup = executorGroups[t];\n        executorGroup.execute(\n          context,\n          1,\n          transform,\n          rotation,\n          hifi,\n          replayTypes\n        );\n      }\n      if (contextSaved) {\n        context.restore();\n      }\n    }\n    context.globalAlpha = alpha;\n    this.ready = ready;\n\n    super.postRender(context, frameState);\n  }\n\n  /**\n   * @param {import(\"../../Feature.js\").FeatureLike} feature Feature.\n   * @param {number} squaredTolerance Squared tolerance.\n   * @param {import(\"../../style/Style.js\").default|Array<import(\"../../style/Style.js\").default>} styles The style or array of styles.\n   * @param {import(\"../../render/canvas/BuilderGroup.js\").default} builderGroup Replay group.\n   * @param {import(\"../../render/canvas/BuilderGroup.js\").default} [declutterBuilderGroup] Builder group for decluttering.\n   * @return {boolean} `true` if an image is loading.\n   */\n  renderFeature(\n    feature,\n    squaredTolerance,\n    styles,\n    builderGroup,\n    declutterBuilderGroup\n  ) {\n    if (!styles) {\n      return false;\n    }\n    let loading = false;\n    if (Array.isArray(styles)) {\n      for (let i = 0, ii = styles.length; i < ii; ++i) {\n        loading =\n          renderFeature(\n            builderGroup,\n            feature,\n            styles[i],\n            squaredTolerance,\n            this.boundHandleStyleImageChange_,\n            undefined,\n            declutterBuilderGroup\n          ) || loading;\n      }\n    } else {\n      loading = renderFeature(\n        builderGroup,\n        feature,\n        styles,\n        squaredTolerance,\n        this.boundHandleStyleImageChange_,\n        undefined,\n        declutterBuilderGroup\n      );\n    }\n    return loading;\n  }\n\n  /**\n   * @param {import(\"../../VectorRenderTile.js\").default} tile Tile.\n   * @return {boolean} A new tile image was rendered.\n   * @private\n   */\n  tileImageNeedsRender_(tile) {\n    const layer = /** @type {import(\"../../layer/VectorTile.js\").default} */ (\n      this.getLayer()\n    );\n    if (layer.getRenderMode() === 'vector') {\n      return false;\n    }\n    const replayState = tile.getReplayState(layer);\n    const revision = layer.getRevision();\n    const resolution = tile.wantedResolution;\n    return (\n      replayState.renderedTileResolution !== resolution ||\n      replayState.renderedTileRevision !== revision\n    );\n  }\n\n  /**\n   * @param {import(\"../../VectorRenderTile.js\").default} tile Tile.\n   * @param {import(\"../../Map\").FrameState} frameState Frame state.\n   * @private\n   */\n  renderTileImage_(tile, frameState) {\n    const layer = /** @type {import(\"../../layer/VectorTile.js\").default} */ (\n      this.getLayer()\n    );\n    const replayState = tile.getReplayState(layer);\n    const revision = layer.getRevision();\n    const executorGroups = tile.executorGroups[getUid(layer)];\n    replayState.renderedTileRevision = revision;\n\n    const tileCoord = tile.wrappedTileCoord;\n    const z = tileCoord[0];\n    const source = layer.getSource();\n    let pixelRatio = frameState.pixelRatio;\n    const viewState = frameState.viewState;\n    const projection = viewState.projection;\n    const tileGrid = source.getTileGridForProjection(projection);\n    const tileResolution = tileGrid.getResolution(tile.tileCoord[0]);\n    const renderPixelRatio =\n      (frameState.pixelRatio / tile.wantedResolution) * tileResolution;\n    const resolution = tileGrid.getResolution(z);\n    const context = tile.getContext(layer);\n\n    // Increase tile size when overzooming for low pixel ratio, to avoid blurry tiles\n    pixelRatio = Math.round(\n      Math.max(pixelRatio, renderPixelRatio / pixelRatio)\n    );\n    const size = source.getTilePixelSize(z, pixelRatio, projection);\n    context.canvas.width = size[0];\n    context.canvas.height = size[1];\n    const renderScale = pixelRatio / renderPixelRatio;\n    if (renderScale !== 1) {\n      const canvasTransform = resetTransform(this.tmpTransform_);\n      scaleTransform(canvasTransform, renderScale, renderScale);\n      context.setTransform.apply(context, canvasTransform);\n    }\n    const tileExtent = tileGrid.getTileCoordExtent(tileCoord, this.tmpExtent);\n    const pixelScale = renderPixelRatio / resolution;\n    const transform = resetTransform(this.tmpTransform_);\n    scaleTransform(transform, pixelScale, -pixelScale);\n    translateTransform(transform, -tileExtent[0], -tileExtent[3]);\n    for (let i = 0, ii = executorGroups.length; i < ii; ++i) {\n      const executorGroup = executorGroups[i];\n      executorGroup.execute(\n        context,\n        renderScale,\n        transform,\n        0,\n        true,\n        IMAGE_REPLAYS[layer.getRenderMode()]\n      );\n    }\n    replayState.renderedTileResolution = tile.wantedResolution;\n  }\n}\n\nexport default CanvasVectorTileLayerRenderer;\n","/**\n * @module ol/geom/Circle\n */\nimport SimpleGeometry from './SimpleGeometry.js';\nimport {createOrUpdate, forEachCorner, intersects} from '../extent.js';\nimport {deflateCoordinate} from './flat/deflate.js';\nimport {rotate} from './flat/transform.js';\n\n/**\n * @classdesc\n * Circle geometry.\n *\n * @api\n */\nclass Circle extends SimpleGeometry {\n  /**\n   * @param {!import(\"../coordinate.js\").Coordinate} center Center.\n   *     For internal use, flat coordinates in combination with `layout` and no\n   *     `radius` are also accepted.\n   * @param {number} [radius] Radius.\n   * @param {import(\"./Geometry.js\").GeometryLayout} [layout] Layout.\n   */\n  constructor(center, radius, layout) {\n    super();\n    if (layout !== undefined && radius === undefined) {\n      this.setFlatCoordinates(layout, center);\n    } else {\n      radius = radius ? radius : 0;\n      this.setCenterAndRadius(center, radius, layout);\n    }\n  }\n\n  /**\n   * Make a complete copy of the geometry.\n   * @return {!Circle} Clone.\n   * @api\n   */\n  clone() {\n    const circle = new Circle(\n      this.flatCoordinates.slice(),\n      undefined,\n      this.layout\n    );\n    circle.applyProperties(this);\n    return circle;\n  }\n\n  /**\n   * @param {number} x X.\n   * @param {number} y Y.\n   * @param {import(\"../coordinate.js\").Coordinate} closestPoint Closest point.\n   * @param {number} minSquaredDistance Minimum squared distance.\n   * @return {number} Minimum squared distance.\n   */\n  closestPointXY(x, y, closestPoint, minSquaredDistance) {\n    const flatCoordinates = this.flatCoordinates;\n    const dx = x - flatCoordinates[0];\n    const dy = y - flatCoordinates[1];\n    const squaredDistance = dx * dx + dy * dy;\n    if (squaredDistance < minSquaredDistance) {\n      if (squaredDistance === 0) {\n        for (let i = 0; i < this.stride; ++i) {\n          closestPoint[i] = flatCoordinates[i];\n        }\n      } else {\n        const delta = this.getRadius() / Math.sqrt(squaredDistance);\n        closestPoint[0] = flatCoordinates[0] + delta * dx;\n        closestPoint[1] = flatCoordinates[1] + delta * dy;\n        for (let i = 2; i < this.stride; ++i) {\n          closestPoint[i] = flatCoordinates[i];\n        }\n      }\n      closestPoint.length = this.stride;\n      return squaredDistance;\n    }\n    return minSquaredDistance;\n  }\n\n  /**\n   * @param {number} x X.\n   * @param {number} y Y.\n   * @return {boolean} Contains (x, y).\n   */\n  containsXY(x, y) {\n    const flatCoordinates = this.flatCoordinates;\n    const dx = x - flatCoordinates[0];\n    const dy = y - flatCoordinates[1];\n    return dx * dx + dy * dy <= this.getRadiusSquared_();\n  }\n\n  /**\n   * Return the center of the circle as {@link module:ol/coordinate~Coordinate coordinate}.\n   * @return {import(\"../coordinate.js\").Coordinate} Center.\n   * @api\n   */\n  getCenter() {\n    return this.flatCoordinates.slice(0, this.stride);\n  }\n\n  /**\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @protected\n   * @return {import(\"../extent.js\").Extent} extent Extent.\n   */\n  computeExtent(extent) {\n    const flatCoordinates = this.flatCoordinates;\n    const radius = flatCoordinates[this.stride] - flatCoordinates[0];\n    return createOrUpdate(\n      flatCoordinates[0] - radius,\n      flatCoordinates[1] - radius,\n      flatCoordinates[0] + radius,\n      flatCoordinates[1] + radius,\n      extent\n    );\n  }\n\n  /**\n   * Return the radius of the circle.\n   * @return {number} Radius.\n   * @api\n   */\n  getRadius() {\n    return Math.sqrt(this.getRadiusSquared_());\n  }\n\n  /**\n   * @private\n   * @return {number} Radius squared.\n   */\n  getRadiusSquared_() {\n    const dx = this.flatCoordinates[this.stride] - this.flatCoordinates[0];\n    const dy = this.flatCoordinates[this.stride + 1] - this.flatCoordinates[1];\n    return dx * dx + dy * dy;\n  }\n\n  /**\n   * Get the type of this geometry.\n   * @return {import(\"./Geometry.js\").Type} Geometry type.\n   * @api\n   */\n  getType() {\n    return 'Circle';\n  }\n\n  /**\n   * Test if the geometry and the passed extent intersect.\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @return {boolean} `true` if the geometry and the extent intersect.\n   * @api\n   */\n  intersectsExtent(extent) {\n    const circleExtent = this.getExtent();\n    if (intersects(extent, circleExtent)) {\n      const center = this.getCenter();\n\n      if (extent[0] <= center[0] && extent[2] >= center[0]) {\n        return true;\n      }\n      if (extent[1] <= center[1] && extent[3] >= center[1]) {\n        return true;\n      }\n\n      return forEachCorner(extent, this.intersectsCoordinate.bind(this));\n    }\n    return false;\n  }\n\n  /**\n   * Set the center of the circle as {@link module:ol/coordinate~Coordinate coordinate}.\n   * @param {import(\"../coordinate.js\").Coordinate} center Center.\n   * @api\n   */\n  setCenter(center) {\n    const stride = this.stride;\n    const radius = this.flatCoordinates[stride] - this.flatCoordinates[0];\n    const flatCoordinates = center.slice();\n    flatCoordinates[stride] = flatCoordinates[0] + radius;\n    for (let i = 1; i < stride; ++i) {\n      flatCoordinates[stride + i] = center[i];\n    }\n    this.setFlatCoordinates(this.layout, flatCoordinates);\n    this.changed();\n  }\n\n  /**\n   * Set the center (as {@link module:ol/coordinate~Coordinate coordinate}) and the radius (as\n   * number) of the circle.\n   * @param {!import(\"../coordinate.js\").Coordinate} center Center.\n   * @param {number} radius Radius.\n   * @param {import(\"./Geometry.js\").GeometryLayout} [layout] Layout.\n   * @api\n   */\n  setCenterAndRadius(center, radius, layout) {\n    this.setLayout(layout, center, 0);\n    if (!this.flatCoordinates) {\n      this.flatCoordinates = [];\n    }\n    /** @type {Array<number>} */\n    const flatCoordinates = this.flatCoordinates;\n    let offset = deflateCoordinate(flatCoordinates, 0, center, this.stride);\n    flatCoordinates[offset++] = flatCoordinates[0] + radius;\n    for (let i = 1, ii = this.stride; i < ii; ++i) {\n      flatCoordinates[offset++] = flatCoordinates[i];\n    }\n    flatCoordinates.length = offset;\n    this.changed();\n  }\n\n  getCoordinates() {\n    return null;\n  }\n\n  setCoordinates(coordinates, layout) {}\n\n  /**\n   * Set the radius of the circle. The radius is in the units of the projection.\n   * @param {number} radius Radius.\n   * @api\n   */\n  setRadius(radius) {\n    this.flatCoordinates[this.stride] = this.flatCoordinates[0] + radius;\n    this.changed();\n  }\n\n  /**\n   * Rotate the geometry around a given coordinate. This modifies the geometry\n   * coordinates in place.\n   * @param {number} angle Rotation angle in counter-clockwise radians.\n   * @param {import(\"../coordinate.js\").Coordinate} anchor The rotation center.\n   * @api\n   */\n  rotate(angle, anchor) {\n    const center = this.getCenter();\n    const stride = this.getStride();\n    this.setCenter(\n      rotate(center, 0, center.length, stride, angle, anchor, center)\n    );\n    this.changed();\n  }\n}\n\n/**\n * Transform each coordinate of the circle from one coordinate reference system\n * to another. The geometry is modified in place.\n * If you do not want the geometry modified in place, first clone() it and\n * then use this function on the clone.\n *\n * Internally a circle is currently represented by two points: the center of\n * the circle `[cx, cy]`, and the point to the right of the circle\n * `[cx + r, cy]`. This `transform` function just transforms these two points.\n * So the resulting geometry is also a circle, and that circle does not\n * correspond to the shape that would be obtained by transforming every point\n * of the original circle.\n *\n * @param {import(\"../proj.js\").ProjectionLike} source The current projection.  Can be a\n *     string identifier or a {@link module:ol/proj/Projection~Projection} object.\n * @param {import(\"../proj.js\").ProjectionLike} destination The desired projection.  Can be a\n *     string identifier or a {@link module:ol/proj/Projection~Projection} object.\n * @return {Circle} This geometry.  Note that original geometry is\n *     modified in place.\n * @function\n * @api\n */\nCircle.prototype.transform;\nexport default Circle;\n","/**\n * @module ol/geom/GeometryCollection\n */\nimport EventType from '../events/EventType.js';\nimport Geometry from './Geometry.js';\nimport {\n  closestSquaredDistanceXY,\n  createOrUpdateEmpty,\n  extend,\n  getCenter,\n} from '../extent.js';\nimport {listen, unlistenByKey} from '../events.js';\n\n/**\n * @classdesc\n * An array of {@link module:ol/geom/Geometry~Geometry} objects.\n *\n * @api\n */\nclass GeometryCollection extends Geometry {\n  /**\n   * @param {Array<Geometry>} [geometries] Geometries.\n   */\n  constructor(geometries) {\n    super();\n\n    /**\n     * @private\n     * @type {Array<Geometry>}\n     */\n    this.geometries_ = geometries ? geometries : null;\n\n    /**\n     * @type {Array<import(\"../events.js\").EventsKey>}\n     */\n    this.changeEventsKeys_ = [];\n\n    this.listenGeometriesChange_();\n  }\n\n  /**\n   * @private\n   */\n  unlistenGeometriesChange_() {\n    this.changeEventsKeys_.forEach(unlistenByKey);\n    this.changeEventsKeys_.length = 0;\n  }\n\n  /**\n   * @private\n   */\n  listenGeometriesChange_() {\n    if (!this.geometries_) {\n      return;\n    }\n    for (let i = 0, ii = this.geometries_.length; i < ii; ++i) {\n      this.changeEventsKeys_.push(\n        listen(this.geometries_[i], EventType.CHANGE, this.changed, this)\n      );\n    }\n  }\n\n  /**\n   * Make a complete copy of the geometry.\n   * @return {!GeometryCollection} Clone.\n   * @api\n   */\n  clone() {\n    const geometryCollection = new GeometryCollection(null);\n    geometryCollection.setGeometries(this.geometries_);\n    geometryCollection.applyProperties(this);\n    return geometryCollection;\n  }\n\n  /**\n   * @param {number} x X.\n   * @param {number} y Y.\n   * @param {import(\"../coordinate.js\").Coordinate} closestPoint Closest point.\n   * @param {number} minSquaredDistance Minimum squared distance.\n   * @return {number} Minimum squared distance.\n   */\n  closestPointXY(x, y, closestPoint, minSquaredDistance) {\n    if (minSquaredDistance < closestSquaredDistanceXY(this.getExtent(), x, y)) {\n      return minSquaredDistance;\n    }\n    const geometries = this.geometries_;\n    for (let i = 0, ii = geometries.length; i < ii; ++i) {\n      minSquaredDistance = geometries[i].closestPointXY(\n        x,\n        y,\n        closestPoint,\n        minSquaredDistance\n      );\n    }\n    return minSquaredDistance;\n  }\n\n  /**\n   * @param {number} x X.\n   * @param {number} y Y.\n   * @return {boolean} Contains (x, y).\n   */\n  containsXY(x, y) {\n    const geometries = this.geometries_;\n    for (let i = 0, ii = geometries.length; i < ii; ++i) {\n      if (geometries[i].containsXY(x, y)) {\n        return true;\n      }\n    }\n    return false;\n  }\n\n  /**\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @protected\n   * @return {import(\"../extent.js\").Extent} extent Extent.\n   */\n  computeExtent(extent) {\n    createOrUpdateEmpty(extent);\n    const geometries = this.geometries_;\n    for (let i = 0, ii = geometries.length; i < ii; ++i) {\n      extend(extent, geometries[i].getExtent());\n    }\n    return extent;\n  }\n\n  /**\n   * Return the geometries that make up this geometry collection.\n   * @return {Array<Geometry>} Geometries.\n   * @api\n   */\n  getGeometries() {\n    return cloneGeometries(this.geometries_);\n  }\n\n  /**\n   * @return {Array<Geometry>} Geometries.\n   */\n  getGeometriesArray() {\n    return this.geometries_;\n  }\n\n  /**\n   * @return {Array<Geometry>} Geometries.\n   */\n  getGeometriesArrayRecursive() {\n    /** @type {Array<Geometry>} */\n    let geometriesArray = [];\n    const geometries = this.geometries_;\n    for (let i = 0, ii = geometries.length; i < ii; ++i) {\n      if (geometries[i].getType() === this.getType()) {\n        geometriesArray = geometriesArray.concat(\n          /** @type {GeometryCollection} */ (\n            geometries[i]\n          ).getGeometriesArrayRecursive()\n        );\n      } else {\n        geometriesArray.push(geometries[i]);\n      }\n    }\n    return geometriesArray;\n  }\n\n  /**\n   * Create a simplified version of this geometry using the Douglas Peucker algorithm.\n   * @param {number} squaredTolerance Squared tolerance.\n   * @return {GeometryCollection} Simplified GeometryCollection.\n   */\n  getSimplifiedGeometry(squaredTolerance) {\n    if (this.simplifiedGeometryRevision !== this.getRevision()) {\n      this.simplifiedGeometryMaxMinSquaredTolerance = 0;\n      this.simplifiedGeometryRevision = this.getRevision();\n    }\n    if (\n      squaredTolerance < 0 ||\n      (this.simplifiedGeometryMaxMinSquaredTolerance !== 0 &&\n        squaredTolerance < this.simplifiedGeometryMaxMinSquaredTolerance)\n    ) {\n      return this;\n    }\n\n    const simplifiedGeometries = [];\n    const geometries = this.geometries_;\n    let simplified = false;\n    for (let i = 0, ii = geometries.length; i < ii; ++i) {\n      const geometry = geometries[i];\n      const simplifiedGeometry =\n        geometry.getSimplifiedGeometry(squaredTolerance);\n      simplifiedGeometries.push(simplifiedGeometry);\n      if (simplifiedGeometry !== geometry) {\n        simplified = true;\n      }\n    }\n    if (simplified) {\n      const simplifiedGeometryCollection = new GeometryCollection(null);\n      simplifiedGeometryCollection.setGeometriesArray(simplifiedGeometries);\n      return simplifiedGeometryCollection;\n    }\n    this.simplifiedGeometryMaxMinSquaredTolerance = squaredTolerance;\n    return this;\n  }\n\n  /**\n   * Get the type of this geometry.\n   * @return {import(\"./Geometry.js\").Type} Geometry type.\n   * @api\n   */\n  getType() {\n    return 'GeometryCollection';\n  }\n\n  /**\n   * Test if the geometry and the passed extent intersect.\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @return {boolean} `true` if the geometry and the extent intersect.\n   * @api\n   */\n  intersectsExtent(extent) {\n    const geometries = this.geometries_;\n    for (let i = 0, ii = geometries.length; i < ii; ++i) {\n      if (geometries[i].intersectsExtent(extent)) {\n        return true;\n      }\n    }\n    return false;\n  }\n\n  /**\n   * @return {boolean} Is empty.\n   */\n  isEmpty() {\n    return this.geometries_.length === 0;\n  }\n\n  /**\n   * Rotate the geometry around a given coordinate. This modifies the geometry\n   * coordinates in place.\n   * @param {number} angle Rotation angle in radians.\n   * @param {import(\"../coordinate.js\").Coordinate} anchor The rotation center.\n   * @api\n   */\n  rotate(angle, anchor) {\n    const geometries = this.geometries_;\n    for (let i = 0, ii = geometries.length; i < ii; ++i) {\n      geometries[i].rotate(angle, anchor);\n    }\n    this.changed();\n  }\n\n  /**\n   * Scale the geometry (with an optional origin).  This modifies the geometry\n   * coordinates in place.\n   * @abstract\n   * @param {number} sx The scaling factor in the x-direction.\n   * @param {number} [sy] The scaling factor in the y-direction (defaults to sx).\n   * @param {import(\"../coordinate.js\").Coordinate} [anchor] The scale origin (defaults to the center\n   *     of the geometry extent).\n   * @api\n   */\n  scale(sx, sy, anchor) {\n    if (!anchor) {\n      anchor = getCenter(this.getExtent());\n    }\n    const geometries = this.geometries_;\n    for (let i = 0, ii = geometries.length; i < ii; ++i) {\n      geometries[i].scale(sx, sy, anchor);\n    }\n    this.changed();\n  }\n\n  /**\n   * Set the geometries that make up this geometry collection.\n   * @param {Array<Geometry>} geometries Geometries.\n   * @api\n   */\n  setGeometries(geometries) {\n    this.setGeometriesArray(cloneGeometries(geometries));\n  }\n\n  /**\n   * @param {Array<Geometry>} geometries Geometries.\n   */\n  setGeometriesArray(geometries) {\n    this.unlistenGeometriesChange_();\n    this.geometries_ = geometries;\n    this.listenGeometriesChange_();\n    this.changed();\n  }\n\n  /**\n   * Apply a transform function to the coordinates of the geometry.\n   * The geometry is modified in place.\n   * If you do not want the geometry modified in place, first `clone()` it and\n   * then use this function on the clone.\n   * @param {import(\"../proj.js\").TransformFunction} transformFn Transform function.\n   * Called with a flat array of geometry coordinates.\n   * @api\n   */\n  applyTransform(transformFn) {\n    const geometries = this.geometries_;\n    for (let i = 0, ii = geometries.length; i < ii; ++i) {\n      geometries[i].applyTransform(transformFn);\n    }\n    this.changed();\n  }\n\n  /**\n   * Translate the geometry.  This modifies the geometry coordinates in place.  If\n   * instead you want a new geometry, first `clone()` this geometry.\n   * @param {number} deltaX Delta X.\n   * @param {number} deltaY Delta Y.\n   * @api\n   */\n  translate(deltaX, deltaY) {\n    const geometries = this.geometries_;\n    for (let i = 0, ii = geometries.length; i < ii; ++i) {\n      geometries[i].translate(deltaX, deltaY);\n    }\n    this.changed();\n  }\n\n  /**\n   * Clean up.\n   */\n  disposeInternal() {\n    this.unlistenGeometriesChange_();\n    super.disposeInternal();\n  }\n}\n\n/**\n * @param {Array<Geometry>} geometries Geometries.\n * @return {Array<Geometry>} Cloned geometries.\n */\nfunction cloneGeometries(geometries) {\n  const clonedGeometries = [];\n  for (let i = 0, ii = geometries.length; i < ii; ++i) {\n    clonedGeometries.push(geometries[i].clone());\n  }\n  return clonedGeometries;\n}\n\nexport default GeometryCollection;\n","/**\n * @module ol/geom/flat/interpolate\n */\nimport {binarySearch} from '../../array.js';\nimport {lerp} from '../../math.js';\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} fraction Fraction.\n * @param {Array<number>} [dest] Destination.\n * @param {number} [dimension] Destination dimension (default is `2`)\n * @return {Array<number>} Destination.\n */\nexport function interpolatePoint(\n  flatCoordinates,\n  offset,\n  end,\n  stride,\n  fraction,\n  dest,\n  dimension\n) {\n  let o, t;\n  const n = (end - offset) / stride;\n  if (n === 1) {\n    o = offset;\n  } else if (n === 2) {\n    o = offset;\n    t = fraction;\n  } else if (n !== 0) {\n    let x1 = flatCoordinates[offset];\n    let y1 = flatCoordinates[offset + 1];\n    let length = 0;\n    const cumulativeLengths = [0];\n    for (let i = offset + stride; i < end; i += stride) {\n      const x2 = flatCoordinates[i];\n      const y2 = flatCoordinates[i + 1];\n      length += Math.sqrt((x2 - x1) * (x2 - x1) + (y2 - y1) * (y2 - y1));\n      cumulativeLengths.push(length);\n      x1 = x2;\n      y1 = y2;\n    }\n    const target = fraction * length;\n    const index = binarySearch(cumulativeLengths, target);\n    if (index < 0) {\n      t =\n        (target - cumulativeLengths[-index - 2]) /\n        (cumulativeLengths[-index - 1] - cumulativeLengths[-index - 2]);\n      o = offset + (-index - 2) * stride;\n    } else {\n      o = offset + index * stride;\n    }\n  }\n  dimension = dimension > 1 ? dimension : 2;\n  dest = dest ? dest : new Array(dimension);\n  for (let i = 0; i < dimension; ++i) {\n    dest[i] =\n      o === undefined\n        ? NaN\n        : t === undefined\n        ? flatCoordinates[o + i]\n        : lerp(flatCoordinates[o + i], flatCoordinates[o + stride + i], t);\n  }\n  return dest;\n}\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} m M.\n * @param {boolean} extrapolate Extrapolate.\n * @return {import(\"../../coordinate.js\").Coordinate|null} Coordinate.\n */\nexport function lineStringCoordinateAtM(\n  flatCoordinates,\n  offset,\n  end,\n  stride,\n  m,\n  extrapolate\n) {\n  if (end == offset) {\n    return null;\n  }\n  let coordinate;\n  if (m < flatCoordinates[offset + stride - 1]) {\n    if (extrapolate) {\n      coordinate = flatCoordinates.slice(offset, offset + stride);\n      coordinate[stride - 1] = m;\n      return coordinate;\n    }\n    return null;\n  }\n  if (flatCoordinates[end - 1] < m) {\n    if (extrapolate) {\n      coordinate = flatCoordinates.slice(end - stride, end);\n      coordinate[stride - 1] = m;\n      return coordinate;\n    }\n    return null;\n  }\n  // FIXME use O(1) search\n  if (m == flatCoordinates[offset + stride - 1]) {\n    return flatCoordinates.slice(offset, offset + stride);\n  }\n  let lo = offset / stride;\n  let hi = end / stride;\n  while (lo < hi) {\n    const mid = (lo + hi) >> 1;\n    if (m < flatCoordinates[(mid + 1) * stride - 1]) {\n      hi = mid;\n    } else {\n      lo = mid + 1;\n    }\n  }\n  const m0 = flatCoordinates[lo * stride - 1];\n  if (m == m0) {\n    return flatCoordinates.slice((lo - 1) * stride, (lo - 1) * stride + stride);\n  }\n  const m1 = flatCoordinates[(lo + 1) * stride - 1];\n  const t = (m - m0) / (m1 - m0);\n  coordinate = [];\n  for (let i = 0; i < stride - 1; ++i) {\n    coordinate.push(\n      lerp(\n        flatCoordinates[(lo - 1) * stride + i],\n        flatCoordinates[lo * stride + i],\n        t\n      )\n    );\n  }\n  coordinate.push(m);\n  return coordinate;\n}\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<number>} ends Ends.\n * @param {number} stride Stride.\n * @param {number} m M.\n * @param {boolean} extrapolate Extrapolate.\n * @param {boolean} interpolate Interpolate.\n * @return {import(\"../../coordinate.js\").Coordinate|null} Coordinate.\n */\nexport function lineStringsCoordinateAtM(\n  flatCoordinates,\n  offset,\n  ends,\n  stride,\n  m,\n  extrapolate,\n  interpolate\n) {\n  if (interpolate) {\n    return lineStringCoordinateAtM(\n      flatCoordinates,\n      offset,\n      ends[ends.length - 1],\n      stride,\n      m,\n      extrapolate\n    );\n  }\n  let coordinate;\n  if (m < flatCoordinates[stride - 1]) {\n    if (extrapolate) {\n      coordinate = flatCoordinates.slice(0, stride);\n      coordinate[stride - 1] = m;\n      return coordinate;\n    }\n    return null;\n  }\n  if (flatCoordinates[flatCoordinates.length - 1] < m) {\n    if (extrapolate) {\n      coordinate = flatCoordinates.slice(flatCoordinates.length - stride);\n      coordinate[stride - 1] = m;\n      return coordinate;\n    }\n    return null;\n  }\n  for (let i = 0, ii = ends.length; i < ii; ++i) {\n    const end = ends[i];\n    if (offset == end) {\n      continue;\n    }\n    if (m < flatCoordinates[offset + stride - 1]) {\n      return null;\n    }\n    if (m <= flatCoordinates[end - 1]) {\n      return lineStringCoordinateAtM(\n        flatCoordinates,\n        offset,\n        end,\n        stride,\n        m,\n        false\n      );\n    }\n    offset = end;\n  }\n  return null;\n}\n","/**\n * @module ol/geom/LineString\n */\nimport SimpleGeometry from './SimpleGeometry.js';\nimport {assignClosestPoint, maxSquaredDelta} from './flat/closest.js';\nimport {closestSquaredDistanceXY} from '../extent.js';\nimport {deflateCoordinates} from './flat/deflate.js';\nimport {douglasPeucker} from './flat/simplify.js';\nimport {extend} from '../array.js';\nimport {forEach as forEachSegment} from './flat/segments.js';\nimport {inflateCoordinates} from './flat/inflate.js';\nimport {interpolatePoint, lineStringCoordinateAtM} from './flat/interpolate.js';\nimport {intersectsLineString} from './flat/intersectsextent.js';\nimport {lineStringLength} from './flat/length.js';\n\n/**\n * @classdesc\n * Linestring geometry.\n *\n * @api\n */\nclass LineString extends SimpleGeometry {\n  /**\n   * @param {Array<import(\"../coordinate.js\").Coordinate>|Array<number>} coordinates Coordinates.\n   *     For internal use, flat coordinates in combination with `layout` are also accepted.\n   * @param {import(\"./Geometry.js\").GeometryLayout} [layout] Layout.\n   */\n  constructor(coordinates, layout) {\n    super();\n\n    /**\n     * @private\n     * @type {import(\"../coordinate.js\").Coordinate}\n     */\n    this.flatMidpoint_ = null;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.flatMidpointRevision_ = -1;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.maxDelta_ = -1;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.maxDeltaRevision_ = -1;\n\n    if (layout !== undefined && !Array.isArray(coordinates[0])) {\n      this.setFlatCoordinates(\n        layout,\n        /** @type {Array<number>} */ (coordinates)\n      );\n    } else {\n      this.setCoordinates(\n        /** @type {Array<import(\"../coordinate.js\").Coordinate>} */ (\n          coordinates\n        ),\n        layout\n      );\n    }\n  }\n\n  /**\n   * Append the passed coordinate to the coordinates of the linestring.\n   * @param {import(\"../coordinate.js\").Coordinate} coordinate Coordinate.\n   * @api\n   */\n  appendCoordinate(coordinate) {\n    if (!this.flatCoordinates) {\n      this.flatCoordinates = coordinate.slice();\n    } else {\n      extend(this.flatCoordinates, coordinate);\n    }\n    this.changed();\n  }\n\n  /**\n   * Make a complete copy of the geometry.\n   * @return {!LineString} Clone.\n   * @api\n   */\n  clone() {\n    const lineString = new LineString(\n      this.flatCoordinates.slice(),\n      this.layout\n    );\n    lineString.applyProperties(this);\n    return lineString;\n  }\n\n  /**\n   * @param {number} x X.\n   * @param {number} y Y.\n   * @param {import(\"../coordinate.js\").Coordinate} closestPoint Closest point.\n   * @param {number} minSquaredDistance Minimum squared distance.\n   * @return {number} Minimum squared distance.\n   */\n  closestPointXY(x, y, closestPoint, minSquaredDistance) {\n    if (minSquaredDistance < closestSquaredDistanceXY(this.getExtent(), x, y)) {\n      return minSquaredDistance;\n    }\n    if (this.maxDeltaRevision_ != this.getRevision()) {\n      this.maxDelta_ = Math.sqrt(\n        maxSquaredDelta(\n          this.flatCoordinates,\n          0,\n          this.flatCoordinates.length,\n          this.stride,\n          0\n        )\n      );\n      this.maxDeltaRevision_ = this.getRevision();\n    }\n    return assignClosestPoint(\n      this.flatCoordinates,\n      0,\n      this.flatCoordinates.length,\n      this.stride,\n      this.maxDelta_,\n      false,\n      x,\n      y,\n      closestPoint,\n      minSquaredDistance\n    );\n  }\n\n  /**\n   * Iterate over each segment, calling the provided callback.\n   * If the callback returns a truthy value the function returns that\n   * value immediately. Otherwise the function returns `false`.\n   *\n   * @param {function(this: S, import(\"../coordinate.js\").Coordinate, import(\"../coordinate.js\").Coordinate): T} callback Function\n   *     called for each segment. The function will receive two arguments, the start and end coordinates of the segment.\n   * @return {T|boolean} Value.\n   * @template T,S\n   * @api\n   */\n  forEachSegment(callback) {\n    return forEachSegment(\n      this.flatCoordinates,\n      0,\n      this.flatCoordinates.length,\n      this.stride,\n      callback\n    );\n  }\n\n  /**\n   * Returns the coordinate at `m` using linear interpolation, or `null` if no\n   * such coordinate exists.\n   *\n   * `extrapolate` controls extrapolation beyond the range of Ms in the\n   * MultiLineString. If `extrapolate` is `true` then Ms less than the first\n   * M will return the first coordinate and Ms greater than the last M will\n   * return the last coordinate.\n   *\n   * @param {number} m M.\n   * @param {boolean} [extrapolate] Extrapolate. Default is `false`.\n   * @return {import(\"../coordinate.js\").Coordinate|null} Coordinate.\n   * @api\n   */\n  getCoordinateAtM(m, extrapolate) {\n    if (this.layout != 'XYM' && this.layout != 'XYZM') {\n      return null;\n    }\n    extrapolate = extrapolate !== undefined ? extrapolate : false;\n    return lineStringCoordinateAtM(\n      this.flatCoordinates,\n      0,\n      this.flatCoordinates.length,\n      this.stride,\n      m,\n      extrapolate\n    );\n  }\n\n  /**\n   * Return the coordinates of the linestring.\n   * @return {Array<import(\"../coordinate.js\").Coordinate>} Coordinates.\n   * @api\n   */\n  getCoordinates() {\n    return inflateCoordinates(\n      this.flatCoordinates,\n      0,\n      this.flatCoordinates.length,\n      this.stride\n    );\n  }\n\n  /**\n   * Return the coordinate at the provided fraction along the linestring.\n   * The `fraction` is a number between 0 and 1, where 0 is the start of the\n   * linestring and 1 is the end.\n   * @param {number} fraction Fraction.\n   * @param {import(\"../coordinate.js\").Coordinate} [dest] Optional coordinate whose values will\n   *     be modified. If not provided, a new coordinate will be returned.\n   * @return {import(\"../coordinate.js\").Coordinate} Coordinate of the interpolated point.\n   * @api\n   */\n  getCoordinateAt(fraction, dest) {\n    return interpolatePoint(\n      this.flatCoordinates,\n      0,\n      this.flatCoordinates.length,\n      this.stride,\n      fraction,\n      dest,\n      this.stride\n    );\n  }\n\n  /**\n   * Return the length of the linestring on projected plane.\n   * @return {number} Length (on projected plane).\n   * @api\n   */\n  getLength() {\n    return lineStringLength(\n      this.flatCoordinates,\n      0,\n      this.flatCoordinates.length,\n      this.stride\n    );\n  }\n\n  /**\n   * @return {Array<number>} Flat midpoint.\n   */\n  getFlatMidpoint() {\n    if (this.flatMidpointRevision_ != this.getRevision()) {\n      this.flatMidpoint_ = this.getCoordinateAt(0.5, this.flatMidpoint_);\n      this.flatMidpointRevision_ = this.getRevision();\n    }\n    return this.flatMidpoint_;\n  }\n\n  /**\n   * @param {number} squaredTolerance Squared tolerance.\n   * @return {LineString} Simplified LineString.\n   * @protected\n   */\n  getSimplifiedGeometryInternal(squaredTolerance) {\n    const simplifiedFlatCoordinates = [];\n    simplifiedFlatCoordinates.length = douglasPeucker(\n      this.flatCoordinates,\n      0,\n      this.flatCoordinates.length,\n      this.stride,\n      squaredTolerance,\n      simplifiedFlatCoordinates,\n      0\n    );\n    return new LineString(simplifiedFlatCoordinates, 'XY');\n  }\n\n  /**\n   * Get the type of this geometry.\n   * @return {import(\"./Geometry.js\").Type} Geometry type.\n   * @api\n   */\n  getType() {\n    return 'LineString';\n  }\n\n  /**\n   * Test if the geometry and the passed extent intersect.\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @return {boolean} `true` if the geometry and the extent intersect.\n   * @api\n   */\n  intersectsExtent(extent) {\n    return intersectsLineString(\n      this.flatCoordinates,\n      0,\n      this.flatCoordinates.length,\n      this.stride,\n      extent\n    );\n  }\n\n  /**\n   * Set the coordinates of the linestring.\n   * @param {!Array<import(\"../coordinate.js\").Coordinate>} coordinates Coordinates.\n   * @param {import(\"./Geometry.js\").GeometryLayout} [layout] Layout.\n   * @api\n   */\n  setCoordinates(coordinates, layout) {\n    this.setLayout(layout, coordinates, 1);\n    if (!this.flatCoordinates) {\n      this.flatCoordinates = [];\n    }\n    this.flatCoordinates.length = deflateCoordinates(\n      this.flatCoordinates,\n      0,\n      coordinates,\n      this.stride\n    );\n    this.changed();\n  }\n}\n\nexport default LineString;\n","/**\n * @module ol/geom/MultiLineString\n */\nimport LineString from './LineString.js';\nimport SimpleGeometry from './SimpleGeometry.js';\nimport {arrayMaxSquaredDelta, assignClosestArrayPoint} from './flat/closest.js';\nimport {closestSquaredDistanceXY} from '../extent.js';\nimport {deflateCoordinatesArray} from './flat/deflate.js';\nimport {douglasPeuckerArray} from './flat/simplify.js';\nimport {extend} from '../array.js';\nimport {inflateCoordinatesArray} from './flat/inflate.js';\nimport {\n  interpolatePoint,\n  lineStringsCoordinateAtM,\n} from './flat/interpolate.js';\nimport {intersectsLineStringArray} from './flat/intersectsextent.js';\n\n/**\n * @classdesc\n * Multi-linestring geometry.\n *\n * @api\n */\nclass MultiLineString extends SimpleGeometry {\n  /**\n   * @param {Array<Array<import(\"../coordinate.js\").Coordinate>|LineString>|Array<number>} coordinates\n   *     Coordinates or LineString geometries. (For internal use, flat coordinates in\n   *     combination with `layout` and `ends` are also accepted.)\n   * @param {import(\"./Geometry.js\").GeometryLayout} [layout] Layout.\n   * @param {Array<number>} [ends] Flat coordinate ends for internal use.\n   */\n  constructor(coordinates, layout, ends) {\n    super();\n\n    /**\n     * @type {Array<number>}\n     * @private\n     */\n    this.ends_ = [];\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.maxDelta_ = -1;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.maxDeltaRevision_ = -1;\n\n    if (Array.isArray(coordinates[0])) {\n      this.setCoordinates(\n        /** @type {Array<Array<import(\"../coordinate.js\").Coordinate>>} */ (\n          coordinates\n        ),\n        layout\n      );\n    } else if (layout !== undefined && ends) {\n      this.setFlatCoordinates(\n        layout,\n        /** @type {Array<number>} */ (coordinates)\n      );\n      this.ends_ = ends;\n    } else {\n      let layout = this.getLayout();\n      const lineStrings = /** @type {Array<LineString>} */ (coordinates);\n      const flatCoordinates = [];\n      const ends = [];\n      for (let i = 0, ii = lineStrings.length; i < ii; ++i) {\n        const lineString = lineStrings[i];\n        if (i === 0) {\n          layout = lineString.getLayout();\n        }\n        extend(flatCoordinates, lineString.getFlatCoordinates());\n        ends.push(flatCoordinates.length);\n      }\n      this.setFlatCoordinates(layout, flatCoordinates);\n      this.ends_ = ends;\n    }\n  }\n\n  /**\n   * Append the passed linestring to the multilinestring.\n   * @param {LineString} lineString LineString.\n   * @api\n   */\n  appendLineString(lineString) {\n    if (!this.flatCoordinates) {\n      this.flatCoordinates = lineString.getFlatCoordinates().slice();\n    } else {\n      extend(this.flatCoordinates, lineString.getFlatCoordinates().slice());\n    }\n    this.ends_.push(this.flatCoordinates.length);\n    this.changed();\n  }\n\n  /**\n   * Make a complete copy of the geometry.\n   * @return {!MultiLineString} Clone.\n   * @api\n   */\n  clone() {\n    const multiLineString = new MultiLineString(\n      this.flatCoordinates.slice(),\n      this.layout,\n      this.ends_.slice()\n    );\n    multiLineString.applyProperties(this);\n    return multiLineString;\n  }\n\n  /**\n   * @param {number} x X.\n   * @param {number} y Y.\n   * @param {import(\"../coordinate.js\").Coordinate} closestPoint Closest point.\n   * @param {number} minSquaredDistance Minimum squared distance.\n   * @return {number} Minimum squared distance.\n   */\n  closestPointXY(x, y, closestPoint, minSquaredDistance) {\n    if (minSquaredDistance < closestSquaredDistanceXY(this.getExtent(), x, y)) {\n      return minSquaredDistance;\n    }\n    if (this.maxDeltaRevision_ != this.getRevision()) {\n      this.maxDelta_ = Math.sqrt(\n        arrayMaxSquaredDelta(\n          this.flatCoordinates,\n          0,\n          this.ends_,\n          this.stride,\n          0\n        )\n      );\n      this.maxDeltaRevision_ = this.getRevision();\n    }\n    return assignClosestArrayPoint(\n      this.flatCoordinates,\n      0,\n      this.ends_,\n      this.stride,\n      this.maxDelta_,\n      false,\n      x,\n      y,\n      closestPoint,\n      minSquaredDistance\n    );\n  }\n\n  /**\n   * Returns the coordinate at `m` using linear interpolation, or `null` if no\n   * such coordinate exists.\n   *\n   * `extrapolate` controls extrapolation beyond the range of Ms in the\n   * MultiLineString. If `extrapolate` is `true` then Ms less than the first\n   * M will return the first coordinate and Ms greater than the last M will\n   * return the last coordinate.\n   *\n   * `interpolate` controls interpolation between consecutive LineStrings\n   * within the MultiLineString. If `interpolate` is `true` the coordinates\n   * will be linearly interpolated between the last coordinate of one LineString\n   * and the first coordinate of the next LineString.  If `interpolate` is\n   * `false` then the function will return `null` for Ms falling between\n   * LineStrings.\n   *\n   * @param {number} m M.\n   * @param {boolean} [extrapolate] Extrapolate. Default is `false`.\n   * @param {boolean} [interpolate] Interpolate. Default is `false`.\n   * @return {import(\"../coordinate.js\").Coordinate|null} Coordinate.\n   * @api\n   */\n  getCoordinateAtM(m, extrapolate, interpolate) {\n    if (\n      (this.layout != 'XYM' && this.layout != 'XYZM') ||\n      this.flatCoordinates.length === 0\n    ) {\n      return null;\n    }\n    extrapolate = extrapolate !== undefined ? extrapolate : false;\n    interpolate = interpolate !== undefined ? interpolate : false;\n    return lineStringsCoordinateAtM(\n      this.flatCoordinates,\n      0,\n      this.ends_,\n      this.stride,\n      m,\n      extrapolate,\n      interpolate\n    );\n  }\n\n  /**\n   * Return the coordinates of the multilinestring.\n   * @return {Array<Array<import(\"../coordinate.js\").Coordinate>>} Coordinates.\n   * @api\n   */\n  getCoordinates() {\n    return inflateCoordinatesArray(\n      this.flatCoordinates,\n      0,\n      this.ends_,\n      this.stride\n    );\n  }\n\n  /**\n   * @return {Array<number>} Ends.\n   */\n  getEnds() {\n    return this.ends_;\n  }\n\n  /**\n   * Return the linestring at the specified index.\n   * @param {number} index Index.\n   * @return {LineString} LineString.\n   * @api\n   */\n  getLineString(index) {\n    if (index < 0 || this.ends_.length <= index) {\n      return null;\n    }\n    return new LineString(\n      this.flatCoordinates.slice(\n        index === 0 ? 0 : this.ends_[index - 1],\n        this.ends_[index]\n      ),\n      this.layout\n    );\n  }\n\n  /**\n   * Return the linestrings of this multilinestring.\n   * @return {Array<LineString>} LineStrings.\n   * @api\n   */\n  getLineStrings() {\n    const flatCoordinates = this.flatCoordinates;\n    const ends = this.ends_;\n    const layout = this.layout;\n    /** @type {Array<LineString>} */\n    const lineStrings = [];\n    let offset = 0;\n    for (let i = 0, ii = ends.length; i < ii; ++i) {\n      const end = ends[i];\n      const lineString = new LineString(\n        flatCoordinates.slice(offset, end),\n        layout\n      );\n      lineStrings.push(lineString);\n      offset = end;\n    }\n    return lineStrings;\n  }\n\n  /**\n   * @return {Array<number>} Flat midpoints.\n   */\n  getFlatMidpoints() {\n    const midpoints = [];\n    const flatCoordinates = this.flatCoordinates;\n    let offset = 0;\n    const ends = this.ends_;\n    const stride = this.stride;\n    for (let i = 0, ii = ends.length; i < ii; ++i) {\n      const end = ends[i];\n      const midpoint = interpolatePoint(\n        flatCoordinates,\n        offset,\n        end,\n        stride,\n        0.5\n      );\n      extend(midpoints, midpoint);\n      offset = end;\n    }\n    return midpoints;\n  }\n\n  /**\n   * @param {number} squaredTolerance Squared tolerance.\n   * @return {MultiLineString} Simplified MultiLineString.\n   * @protected\n   */\n  getSimplifiedGeometryInternal(squaredTolerance) {\n    const simplifiedFlatCoordinates = [];\n    const simplifiedEnds = [];\n    simplifiedFlatCoordinates.length = douglasPeuckerArray(\n      this.flatCoordinates,\n      0,\n      this.ends_,\n      this.stride,\n      squaredTolerance,\n      simplifiedFlatCoordinates,\n      0,\n      simplifiedEnds\n    );\n    return new MultiLineString(simplifiedFlatCoordinates, 'XY', simplifiedEnds);\n  }\n\n  /**\n   * Get the type of this geometry.\n   * @return {import(\"./Geometry.js\").Type} Geometry type.\n   * @api\n   */\n  getType() {\n    return 'MultiLineString';\n  }\n\n  /**\n   * Test if the geometry and the passed extent intersect.\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @return {boolean} `true` if the geometry and the extent intersect.\n   * @api\n   */\n  intersectsExtent(extent) {\n    return intersectsLineStringArray(\n      this.flatCoordinates,\n      0,\n      this.ends_,\n      this.stride,\n      extent\n    );\n  }\n\n  /**\n   * Set the coordinates of the multilinestring.\n   * @param {!Array<Array<import(\"../coordinate.js\").Coordinate>>} coordinates Coordinates.\n   * @param {import(\"./Geometry.js\").GeometryLayout} [layout] Layout.\n   * @api\n   */\n  setCoordinates(coordinates, layout) {\n    this.setLayout(layout, coordinates, 2);\n    if (!this.flatCoordinates) {\n      this.flatCoordinates = [];\n    }\n    const ends = deflateCoordinatesArray(\n      this.flatCoordinates,\n      0,\n      coordinates,\n      this.stride,\n      this.ends_\n    );\n    this.flatCoordinates.length = ends.length === 0 ? 0 : ends[ends.length - 1];\n    this.changed();\n  }\n}\n\nexport default MultiLineString;\n","/**\n * @module ol/geom/MultiPoint\n */\nimport Point from './Point.js';\nimport SimpleGeometry from './SimpleGeometry.js';\nimport {closestSquaredDistanceXY, containsXY} from '../extent.js';\nimport {deflateCoordinates} from './flat/deflate.js';\nimport {extend} from '../array.js';\nimport {inflateCoordinates} from './flat/inflate.js';\nimport {squaredDistance as squaredDx} from '../math.js';\n\n/**\n * @classdesc\n * Multi-point geometry.\n *\n * @api\n */\nclass MultiPoint extends SimpleGeometry {\n  /**\n   * @param {Array<import(\"../coordinate.js\").Coordinate>|Array<number>} coordinates Coordinates.\n   *     For internal use, flat coordinates in combination with `layout` are also accepted.\n   * @param {import(\"./Geometry.js\").GeometryLayout} [layout] Layout.\n   */\n  constructor(coordinates, layout) {\n    super();\n    if (layout && !Array.isArray(coordinates[0])) {\n      this.setFlatCoordinates(\n        layout,\n        /** @type {Array<number>} */ (coordinates)\n      );\n    } else {\n      this.setCoordinates(\n        /** @type {Array<import(\"../coordinate.js\").Coordinate>} */ (\n          coordinates\n        ),\n        layout\n      );\n    }\n  }\n\n  /**\n   * Append the passed point to this multipoint.\n   * @param {Point} point Point.\n   * @api\n   */\n  appendPoint(point) {\n    if (!this.flatCoordinates) {\n      this.flatCoordinates = point.getFlatCoordinates().slice();\n    } else {\n      extend(this.flatCoordinates, point.getFlatCoordinates());\n    }\n    this.changed();\n  }\n\n  /**\n   * Make a complete copy of the geometry.\n   * @return {!MultiPoint} Clone.\n   * @api\n   */\n  clone() {\n    const multiPoint = new MultiPoint(\n      this.flatCoordinates.slice(),\n      this.layout\n    );\n    multiPoint.applyProperties(this);\n    return multiPoint;\n  }\n\n  /**\n   * @param {number} x X.\n   * @param {number} y Y.\n   * @param {import(\"../coordinate.js\").Coordinate} closestPoint Closest point.\n   * @param {number} minSquaredDistance Minimum squared distance.\n   * @return {number} Minimum squared distance.\n   */\n  closestPointXY(x, y, closestPoint, minSquaredDistance) {\n    if (minSquaredDistance < closestSquaredDistanceXY(this.getExtent(), x, y)) {\n      return minSquaredDistance;\n    }\n    const flatCoordinates = this.flatCoordinates;\n    const stride = this.stride;\n    for (let i = 0, ii = flatCoordinates.length; i < ii; i += stride) {\n      const squaredDistance = squaredDx(\n        x,\n        y,\n        flatCoordinates[i],\n        flatCoordinates[i + 1]\n      );\n      if (squaredDistance < minSquaredDistance) {\n        minSquaredDistance = squaredDistance;\n        for (let j = 0; j < stride; ++j) {\n          closestPoint[j] = flatCoordinates[i + j];\n        }\n        closestPoint.length = stride;\n      }\n    }\n    return minSquaredDistance;\n  }\n\n  /**\n   * Return the coordinates of the multipoint.\n   * @return {Array<import(\"../coordinate.js\").Coordinate>} Coordinates.\n   * @api\n   */\n  getCoordinates() {\n    return inflateCoordinates(\n      this.flatCoordinates,\n      0,\n      this.flatCoordinates.length,\n      this.stride\n    );\n  }\n\n  /**\n   * Return the point at the specified index.\n   * @param {number} index Index.\n   * @return {Point} Point.\n   * @api\n   */\n  getPoint(index) {\n    const n = !this.flatCoordinates\n      ? 0\n      : this.flatCoordinates.length / this.stride;\n    if (index < 0 || n <= index) {\n      return null;\n    }\n    return new Point(\n      this.flatCoordinates.slice(\n        index * this.stride,\n        (index + 1) * this.stride\n      ),\n      this.layout\n    );\n  }\n\n  /**\n   * Return the points of this multipoint.\n   * @return {Array<Point>} Points.\n   * @api\n   */\n  getPoints() {\n    const flatCoordinates = this.flatCoordinates;\n    const layout = this.layout;\n    const stride = this.stride;\n    /** @type {Array<Point>} */\n    const points = [];\n    for (let i = 0, ii = flatCoordinates.length; i < ii; i += stride) {\n      const point = new Point(flatCoordinates.slice(i, i + stride), layout);\n      points.push(point);\n    }\n    return points;\n  }\n\n  /**\n   * Get the type of this geometry.\n   * @return {import(\"./Geometry.js\").Type} Geometry type.\n   * @api\n   */\n  getType() {\n    return 'MultiPoint';\n  }\n\n  /**\n   * Test if the geometry and the passed extent intersect.\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @return {boolean} `true` if the geometry and the extent intersect.\n   * @api\n   */\n  intersectsExtent(extent) {\n    const flatCoordinates = this.flatCoordinates;\n    const stride = this.stride;\n    for (let i = 0, ii = flatCoordinates.length; i < ii; i += stride) {\n      const x = flatCoordinates[i];\n      const y = flatCoordinates[i + 1];\n      if (containsXY(extent, x, y)) {\n        return true;\n      }\n    }\n    return false;\n  }\n\n  /**\n   * Set the coordinates of the multipoint.\n   * @param {!Array<import(\"../coordinate.js\").Coordinate>} coordinates Coordinates.\n   * @param {import(\"./Geometry.js\").GeometryLayout} [layout] Layout.\n   * @api\n   */\n  setCoordinates(coordinates, layout) {\n    this.setLayout(layout, coordinates, 1);\n    if (!this.flatCoordinates) {\n      this.flatCoordinates = [];\n    }\n    this.flatCoordinates.length = deflateCoordinates(\n      this.flatCoordinates,\n      0,\n      coordinates,\n      this.stride\n    );\n    this.changed();\n  }\n}\n\nexport default MultiPoint;\n","/**\n * @module ol/geom/flat/center\n */\nimport {createEmpty, createOrUpdateFromFlatCoordinates} from '../../extent.js';\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<Array<number>>} endss Endss.\n * @param {number} stride Stride.\n * @return {Array<number>} Flat centers.\n */\nexport function linearRingss(flatCoordinates, offset, endss, stride) {\n  const flatCenters = [];\n  let extent = createEmpty();\n  for (let i = 0, ii = endss.length; i < ii; ++i) {\n    const ends = endss[i];\n    extent = createOrUpdateFromFlatCoordinates(\n      flatCoordinates,\n      offset,\n      ends[0],\n      stride\n    );\n    flatCenters.push((extent[0] + extent[2]) / 2, (extent[1] + extent[3]) / 2);\n    offset = ends[ends.length - 1];\n  }\n  return flatCenters;\n}\n","/**\n * @module ol/geom/MultiPolygon\n */\nimport MultiPoint from './MultiPoint.js';\nimport Polygon from './Polygon.js';\nimport SimpleGeometry from './SimpleGeometry.js';\nimport {\n  assignClosestMultiArrayPoint,\n  multiArrayMaxSquaredDelta,\n} from './flat/closest.js';\nimport {closestSquaredDistanceXY} from '../extent.js';\nimport {deflateMultiCoordinatesArray} from './flat/deflate.js';\nimport {extend} from '../array.js';\nimport {getInteriorPointsOfMultiArray} from './flat/interiorpoint.js';\nimport {inflateMultiCoordinatesArray} from './flat/inflate.js';\nimport {intersectsLinearRingMultiArray} from './flat/intersectsextent.js';\nimport {\n  linearRingssAreOriented,\n  orientLinearRingsArray,\n} from './flat/orient.js';\nimport {linearRingss as linearRingssArea} from './flat/area.js';\nimport {linearRingss as linearRingssCenter} from './flat/center.js';\nimport {linearRingssContainsXY} from './flat/contains.js';\nimport {quantizeMultiArray} from './flat/simplify.js';\n\n/**\n * @classdesc\n * Multi-polygon geometry.\n *\n * @api\n */\nclass MultiPolygon extends SimpleGeometry {\n  /**\n   * @param {Array<Array<Array<import(\"../coordinate.js\").Coordinate>>|Polygon>|Array<number>} coordinates Coordinates.\n   *     For internal use, flat coordinates in combination with `layout` and `endss` are also accepted.\n   * @param {import(\"./Geometry.js\").GeometryLayout} [layout] Layout.\n   * @param {Array<Array<number>>} [endss] Array of ends for internal use with flat coordinates.\n   */\n  constructor(coordinates, layout, endss) {\n    super();\n\n    /**\n     * @type {Array<Array<number>>}\n     * @private\n     */\n    this.endss_ = [];\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.flatInteriorPointsRevision_ = -1;\n\n    /**\n     * @private\n     * @type {Array<number>}\n     */\n    this.flatInteriorPoints_ = null;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.maxDelta_ = -1;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.maxDeltaRevision_ = -1;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.orientedRevision_ = -1;\n\n    /**\n     * @private\n     * @type {Array<number>}\n     */\n    this.orientedFlatCoordinates_ = null;\n\n    if (!endss && !Array.isArray(coordinates[0])) {\n      let thisLayout = this.getLayout();\n      const polygons = /** @type {Array<Polygon>} */ (coordinates);\n      const flatCoordinates = [];\n      const thisEndss = [];\n      for (let i = 0, ii = polygons.length; i < ii; ++i) {\n        const polygon = polygons[i];\n        if (i === 0) {\n          thisLayout = polygon.getLayout();\n        }\n        const offset = flatCoordinates.length;\n        const ends = polygon.getEnds();\n        for (let j = 0, jj = ends.length; j < jj; ++j) {\n          ends[j] += offset;\n        }\n        extend(flatCoordinates, polygon.getFlatCoordinates());\n        thisEndss.push(ends);\n      }\n      layout = thisLayout;\n      coordinates = flatCoordinates;\n      endss = thisEndss;\n    }\n    if (layout !== undefined && endss) {\n      this.setFlatCoordinates(\n        layout,\n        /** @type {Array<number>} */ (coordinates)\n      );\n      this.endss_ = endss;\n    } else {\n      this.setCoordinates(\n        /** @type {Array<Array<Array<import(\"../coordinate.js\").Coordinate>>>} */ (\n          coordinates\n        ),\n        layout\n      );\n    }\n  }\n\n  /**\n   * Append the passed polygon to this multipolygon.\n   * @param {Polygon} polygon Polygon.\n   * @api\n   */\n  appendPolygon(polygon) {\n    /** @type {Array<number>} */\n    let ends;\n    if (!this.flatCoordinates) {\n      this.flatCoordinates = polygon.getFlatCoordinates().slice();\n      ends = polygon.getEnds().slice();\n      this.endss_.push();\n    } else {\n      const offset = this.flatCoordinates.length;\n      extend(this.flatCoordinates, polygon.getFlatCoordinates());\n      ends = polygon.getEnds().slice();\n      for (let i = 0, ii = ends.length; i < ii; ++i) {\n        ends[i] += offset;\n      }\n    }\n    this.endss_.push(ends);\n    this.changed();\n  }\n\n  /**\n   * Make a complete copy of the geometry.\n   * @return {!MultiPolygon} Clone.\n   * @api\n   */\n  clone() {\n    const len = this.endss_.length;\n    const newEndss = new Array(len);\n    for (let i = 0; i < len; ++i) {\n      newEndss[i] = this.endss_[i].slice();\n    }\n\n    const multiPolygon = new MultiPolygon(\n      this.flatCoordinates.slice(),\n      this.layout,\n      newEndss\n    );\n    multiPolygon.applyProperties(this);\n\n    return multiPolygon;\n  }\n\n  /**\n   * @param {number} x X.\n   * @param {number} y Y.\n   * @param {import(\"../coordinate.js\").Coordinate} closestPoint Closest point.\n   * @param {number} minSquaredDistance Minimum squared distance.\n   * @return {number} Minimum squared distance.\n   */\n  closestPointXY(x, y, closestPoint, minSquaredDistance) {\n    if (minSquaredDistance < closestSquaredDistanceXY(this.getExtent(), x, y)) {\n      return minSquaredDistance;\n    }\n    if (this.maxDeltaRevision_ != this.getRevision()) {\n      this.maxDelta_ = Math.sqrt(\n        multiArrayMaxSquaredDelta(\n          this.flatCoordinates,\n          0,\n          this.endss_,\n          this.stride,\n          0\n        )\n      );\n      this.maxDeltaRevision_ = this.getRevision();\n    }\n    return assignClosestMultiArrayPoint(\n      this.getOrientedFlatCoordinates(),\n      0,\n      this.endss_,\n      this.stride,\n      this.maxDelta_,\n      true,\n      x,\n      y,\n      closestPoint,\n      minSquaredDistance\n    );\n  }\n\n  /**\n   * @param {number} x X.\n   * @param {number} y Y.\n   * @return {boolean} Contains (x, y).\n   */\n  containsXY(x, y) {\n    return linearRingssContainsXY(\n      this.getOrientedFlatCoordinates(),\n      0,\n      this.endss_,\n      this.stride,\n      x,\n      y\n    );\n  }\n\n  /**\n   * Return the area of the multipolygon on projected plane.\n   * @return {number} Area (on projected plane).\n   * @api\n   */\n  getArea() {\n    return linearRingssArea(\n      this.getOrientedFlatCoordinates(),\n      0,\n      this.endss_,\n      this.stride\n    );\n  }\n\n  /**\n   * Get the coordinate array for this geometry.  This array has the structure\n   * of a GeoJSON coordinate array for multi-polygons.\n   *\n   * @param {boolean} [right] Orient coordinates according to the right-hand\n   *     rule (counter-clockwise for exterior and clockwise for interior rings).\n   *     If `false`, coordinates will be oriented according to the left-hand rule\n   *     (clockwise for exterior and counter-clockwise for interior rings).\n   *     By default, coordinate orientation will depend on how the geometry was\n   *     constructed.\n   * @return {Array<Array<Array<import(\"../coordinate.js\").Coordinate>>>} Coordinates.\n   * @api\n   */\n  getCoordinates(right) {\n    let flatCoordinates;\n    if (right !== undefined) {\n      flatCoordinates = this.getOrientedFlatCoordinates().slice();\n      orientLinearRingsArray(\n        flatCoordinates,\n        0,\n        this.endss_,\n        this.stride,\n        right\n      );\n    } else {\n      flatCoordinates = this.flatCoordinates;\n    }\n\n    return inflateMultiCoordinatesArray(\n      flatCoordinates,\n      0,\n      this.endss_,\n      this.stride\n    );\n  }\n\n  /**\n   * @return {Array<Array<number>>} Endss.\n   */\n  getEndss() {\n    return this.endss_;\n  }\n\n  /**\n   * @return {Array<number>} Flat interior points.\n   */\n  getFlatInteriorPoints() {\n    if (this.flatInteriorPointsRevision_ != this.getRevision()) {\n      const flatCenters = linearRingssCenter(\n        this.flatCoordinates,\n        0,\n        this.endss_,\n        this.stride\n      );\n      this.flatInteriorPoints_ = getInteriorPointsOfMultiArray(\n        this.getOrientedFlatCoordinates(),\n        0,\n        this.endss_,\n        this.stride,\n        flatCenters\n      );\n      this.flatInteriorPointsRevision_ = this.getRevision();\n    }\n    return this.flatInteriorPoints_;\n  }\n\n  /**\n   * Return the interior points as {@link module:ol/geom/MultiPoint~MultiPoint multipoint}.\n   * @return {MultiPoint} Interior points as XYM coordinates, where M is\n   * the length of the horizontal intersection that the point belongs to.\n   * @api\n   */\n  getInteriorPoints() {\n    return new MultiPoint(this.getFlatInteriorPoints().slice(), 'XYM');\n  }\n\n  /**\n   * @return {Array<number>} Oriented flat coordinates.\n   */\n  getOrientedFlatCoordinates() {\n    if (this.orientedRevision_ != this.getRevision()) {\n      const flatCoordinates = this.flatCoordinates;\n      if (\n        linearRingssAreOriented(flatCoordinates, 0, this.endss_, this.stride)\n      ) {\n        this.orientedFlatCoordinates_ = flatCoordinates;\n      } else {\n        this.orientedFlatCoordinates_ = flatCoordinates.slice();\n        this.orientedFlatCoordinates_.length = orientLinearRingsArray(\n          this.orientedFlatCoordinates_,\n          0,\n          this.endss_,\n          this.stride\n        );\n      }\n      this.orientedRevision_ = this.getRevision();\n    }\n    return this.orientedFlatCoordinates_;\n  }\n\n  /**\n   * @param {number} squaredTolerance Squared tolerance.\n   * @return {MultiPolygon} Simplified MultiPolygon.\n   * @protected\n   */\n  getSimplifiedGeometryInternal(squaredTolerance) {\n    const simplifiedFlatCoordinates = [];\n    const simplifiedEndss = [];\n    simplifiedFlatCoordinates.length = quantizeMultiArray(\n      this.flatCoordinates,\n      0,\n      this.endss_,\n      this.stride,\n      Math.sqrt(squaredTolerance),\n      simplifiedFlatCoordinates,\n      0,\n      simplifiedEndss\n    );\n    return new MultiPolygon(simplifiedFlatCoordinates, 'XY', simplifiedEndss);\n  }\n\n  /**\n   * Return the polygon at the specified index.\n   * @param {number} index Index.\n   * @return {Polygon} Polygon.\n   * @api\n   */\n  getPolygon(index) {\n    if (index < 0 || this.endss_.length <= index) {\n      return null;\n    }\n    let offset;\n    if (index === 0) {\n      offset = 0;\n    } else {\n      const prevEnds = this.endss_[index - 1];\n      offset = prevEnds[prevEnds.length - 1];\n    }\n    const ends = this.endss_[index].slice();\n    const end = ends[ends.length - 1];\n    if (offset !== 0) {\n      for (let i = 0, ii = ends.length; i < ii; ++i) {\n        ends[i] -= offset;\n      }\n    }\n    return new Polygon(\n      this.flatCoordinates.slice(offset, end),\n      this.layout,\n      ends\n    );\n  }\n\n  /**\n   * Return the polygons of this multipolygon.\n   * @return {Array<Polygon>} Polygons.\n   * @api\n   */\n  getPolygons() {\n    const layout = this.layout;\n    const flatCoordinates = this.flatCoordinates;\n    const endss = this.endss_;\n    const polygons = [];\n    let offset = 0;\n    for (let i = 0, ii = endss.length; i < ii; ++i) {\n      const ends = endss[i].slice();\n      const end = ends[ends.length - 1];\n      if (offset !== 0) {\n        for (let j = 0, jj = ends.length; j < jj; ++j) {\n          ends[j] -= offset;\n        }\n      }\n      const polygon = new Polygon(\n        flatCoordinates.slice(offset, end),\n        layout,\n        ends\n      );\n      polygons.push(polygon);\n      offset = end;\n    }\n    return polygons;\n  }\n\n  /**\n   * Get the type of this geometry.\n   * @return {import(\"./Geometry.js\").Type} Geometry type.\n   * @api\n   */\n  getType() {\n    return 'MultiPolygon';\n  }\n\n  /**\n   * Test if the geometry and the passed extent intersect.\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @return {boolean} `true` if the geometry and the extent intersect.\n   * @api\n   */\n  intersectsExtent(extent) {\n    return intersectsLinearRingMultiArray(\n      this.getOrientedFlatCoordinates(),\n      0,\n      this.endss_,\n      this.stride,\n      extent\n    );\n  }\n\n  /**\n   * Set the coordinates of the multipolygon.\n   * @param {!Array<Array<Array<import(\"../coordinate.js\").Coordinate>>>} coordinates Coordinates.\n   * @param {import(\"./Geometry.js\").GeometryLayout} [layout] Layout.\n   * @api\n   */\n  setCoordinates(coordinates, layout) {\n    this.setLayout(layout, coordinates, 3);\n    if (!this.flatCoordinates) {\n      this.flatCoordinates = [];\n    }\n    const endss = deflateMultiCoordinatesArray(\n      this.flatCoordinates,\n      0,\n      coordinates,\n      this.stride,\n      this.endss_\n    );\n    if (endss.length === 0) {\n      this.flatCoordinates.length = 0;\n    } else {\n      const lastEnds = endss[endss.length - 1];\n      this.flatCoordinates.length =\n        lastEnds.length === 0 ? 0 : lastEnds[lastEnds.length - 1];\n    }\n    this.changed();\n  }\n}\n\nexport default MultiPolygon;\n","/**\n * @module ol/render/Feature\n */\nimport Feature from '../Feature.js';\nimport {\n  LineString,\n  MultiLineString,\n  MultiPoint,\n  MultiPolygon,\n  Point,\n  Polygon,\n} from '../geom.js';\nimport {\n  compose as composeTransform,\n  create as createTransform,\n} from '../transform.js';\nimport {\n  createOrUpdateFromCoordinate,\n  createOrUpdateFromFlatCoordinates,\n  getCenter,\n  getHeight,\n} from '../extent.js';\nimport {extend} from '../array.js';\nimport {\n  getInteriorPointOfArray,\n  getInteriorPointsOfMultiArray,\n} from '../geom/flat/interiorpoint.js';\nimport {get as getProjection} from '../proj.js';\nimport {inflateEnds} from '../geom/flat/orient.js';\nimport {interpolatePoint} from '../geom/flat/interpolate.js';\nimport {linearRingss as linearRingssCenter} from '../geom/flat/center.js';\nimport {transform2D} from '../geom/flat/transform.js';\n\n/**\n * @type {import(\"../transform.js\").Transform}\n */\nconst tmpTransform = createTransform();\n\n/**\n * Lightweight, read-only, {@link module:ol/Feature~Feature} and {@link module:ol/geom/Geometry~Geometry} like\n * structure, optimized for vector tile rendering and styling. Geometry access\n * through the API is limited to getting the type and extent of the geometry.\n */\nclass RenderFeature {\n  /**\n   * @param {import(\"../geom/Geometry.js\").Type} type Geometry type.\n   * @param {Array<number>} flatCoordinates Flat coordinates. These always need\n   *     to be right-handed for polygons.\n   * @param {Array<number>|Array<Array<number>>} ends Ends or Endss.\n   * @param {Object<string, *>} properties Properties.\n   * @param {number|string|undefined} id Feature id.\n   */\n  constructor(type, flatCoordinates, ends, properties, id) {\n    /**\n     * @type {import(\"../style/Style.js\").StyleFunction|undefined}\n     */\n    this.styleFunction;\n\n    /**\n     * @private\n     * @type {import(\"../extent.js\").Extent|undefined}\n     */\n    this.extent_;\n\n    /**\n     * @private\n     * @type {number|string|undefined}\n     */\n    this.id_ = id;\n\n    /**\n     * @private\n     * @type {import(\"../geom/Geometry.js\").Type}\n     */\n    this.type_ = type;\n\n    /**\n     * @private\n     * @type {Array<number>}\n     */\n    this.flatCoordinates_ = flatCoordinates;\n\n    /**\n     * @private\n     * @type {Array<number>}\n     */\n    this.flatInteriorPoints_ = null;\n\n    /**\n     * @private\n     * @type {Array<number>}\n     */\n    this.flatMidpoints_ = null;\n\n    /**\n     * @private\n     * @type {Array<number>|Array<Array<number>>}\n     */\n    this.ends_ = ends;\n\n    /**\n     * @private\n     * @type {Object<string, *>}\n     */\n    this.properties_ = properties;\n  }\n\n  /**\n   * Get a feature property by its key.\n   * @param {string} key Key\n   * @return {*} Value for the requested key.\n   * @api\n   */\n  get(key) {\n    return this.properties_[key];\n  }\n\n  /**\n   * Get the extent of this feature's geometry.\n   * @return {import(\"../extent.js\").Extent} Extent.\n   * @api\n   */\n  getExtent() {\n    if (!this.extent_) {\n      this.extent_ =\n        this.type_ === 'Point'\n          ? createOrUpdateFromCoordinate(this.flatCoordinates_)\n          : createOrUpdateFromFlatCoordinates(\n              this.flatCoordinates_,\n              0,\n              this.flatCoordinates_.length,\n              2\n            );\n    }\n    return this.extent_;\n  }\n\n  /**\n   * @return {Array<number>} Flat interior points.\n   */\n  getFlatInteriorPoint() {\n    if (!this.flatInteriorPoints_) {\n      const flatCenter = getCenter(this.getExtent());\n      this.flatInteriorPoints_ = getInteriorPointOfArray(\n        this.flatCoordinates_,\n        0,\n        /** @type {Array<number>} */ (this.ends_),\n        2,\n        flatCenter,\n        0\n      );\n    }\n    return this.flatInteriorPoints_;\n  }\n\n  /**\n   * @return {Array<number>} Flat interior points.\n   */\n  getFlatInteriorPoints() {\n    if (!this.flatInteriorPoints_) {\n      const flatCenters = linearRingssCenter(\n        this.flatCoordinates_,\n        0,\n        /** @type {Array<Array<number>>} */ (this.ends_),\n        2\n      );\n      this.flatInteriorPoints_ = getInteriorPointsOfMultiArray(\n        this.flatCoordinates_,\n        0,\n        /** @type {Array<Array<number>>} */ (this.ends_),\n        2,\n        flatCenters\n      );\n    }\n    return this.flatInteriorPoints_;\n  }\n\n  /**\n   * @return {Array<number>} Flat midpoint.\n   */\n  getFlatMidpoint() {\n    if (!this.flatMidpoints_) {\n      this.flatMidpoints_ = interpolatePoint(\n        this.flatCoordinates_,\n        0,\n        this.flatCoordinates_.length,\n        2,\n        0.5\n      );\n    }\n    return this.flatMidpoints_;\n  }\n\n  /**\n   * @return {Array<number>} Flat midpoints.\n   */\n  getFlatMidpoints() {\n    if (!this.flatMidpoints_) {\n      this.flatMidpoints_ = [];\n      const flatCoordinates = this.flatCoordinates_;\n      let offset = 0;\n      const ends = /** @type {Array<number>} */ (this.ends_);\n      for (let i = 0, ii = ends.length; i < ii; ++i) {\n        const end = ends[i];\n        const midpoint = interpolatePoint(flatCoordinates, offset, end, 2, 0.5);\n        extend(this.flatMidpoints_, midpoint);\n        offset = end;\n      }\n    }\n    return this.flatMidpoints_;\n  }\n\n  /**\n   * Get the feature identifier.  This is a stable identifier for the feature and\n   * is set when reading data from a remote source.\n   * @return {number|string|undefined} Id.\n   * @api\n   */\n  getId() {\n    return this.id_;\n  }\n\n  /**\n   * @return {Array<number>} Flat coordinates.\n   */\n  getOrientedFlatCoordinates() {\n    return this.flatCoordinates_;\n  }\n\n  /**\n   * For API compatibility with {@link module:ol/Feature~Feature}, this method is useful when\n   * determining the geometry type in style function (see {@link #getType}).\n   * @return {RenderFeature} Feature.\n   * @api\n   */\n  getGeometry() {\n    return this;\n  }\n\n  /**\n   * @param {number} squaredTolerance Squared tolerance.\n   * @return {RenderFeature} Simplified geometry.\n   */\n  getSimplifiedGeometry(squaredTolerance) {\n    return this;\n  }\n\n  /**\n   * Get a transformed and simplified version of the geometry.\n   * @abstract\n   * @param {number} squaredTolerance Squared tolerance.\n   * @param {import(\"../proj.js\").TransformFunction} [transform] Optional transform function.\n   * @return {RenderFeature} Simplified geometry.\n   */\n  simplifyTransformed(squaredTolerance, transform) {\n    return this;\n  }\n\n  /**\n   * Get the feature properties.\n   * @return {Object<string, *>} Feature properties.\n   * @api\n   */\n  getProperties() {\n    return this.properties_;\n  }\n\n  /**\n   * @return {number} Stride.\n   */\n  getStride() {\n    return 2;\n  }\n\n  /**\n   * @return {import('../style/Style.js').StyleFunction|undefined} Style\n   */\n  getStyleFunction() {\n    return this.styleFunction;\n  }\n\n  /**\n   * Get the type of this feature's geometry.\n   * @return {import(\"../geom/Geometry.js\").Type} Geometry type.\n   * @api\n   */\n  getType() {\n    return this.type_;\n  }\n\n  /**\n   * Transform geometry coordinates from tile pixel space to projected.\n   *\n   * @param {import(\"../proj.js\").ProjectionLike} projection The data projection\n   */\n  transform(projection) {\n    projection = getProjection(projection);\n    const pixelExtent = projection.getExtent();\n    const projectedExtent = projection.getWorldExtent();\n    if (pixelExtent && projectedExtent) {\n      const scale = getHeight(projectedExtent) / getHeight(pixelExtent);\n      composeTransform(\n        tmpTransform,\n        projectedExtent[0],\n        projectedExtent[3],\n        scale,\n        -scale,\n        0,\n        0,\n        0\n      );\n      transform2D(\n        this.flatCoordinates_,\n        0,\n        this.flatCoordinates_.length,\n        2,\n        tmpTransform,\n        this.flatCoordinates_\n      );\n    }\n  }\n  /**\n   * @return {Array<number>|Array<Array<number>>} Ends or endss.\n   */\n  getEnds() {\n    return this.ends_;\n  }\n}\n\nRenderFeature.prototype.getEndss = RenderFeature.prototype.getEnds;\n\n/**\n * @return {Array<number>} Flat coordinates.\n */\nRenderFeature.prototype.getFlatCoordinates =\n  RenderFeature.prototype.getOrientedFlatCoordinates;\n\n/**\n * Create a geometry from an `ol/render/Feature`\n * @param {RenderFeature} renderFeature\n * Render Feature\n * @return {Point|MultiPoint|LineString|MultiLineString|Polygon|MultiPolygon}\n * New geometry instance.\n * @api\n */\nexport function toGeometry(renderFeature) {\n  const geometryType = renderFeature.getType();\n  switch (geometryType) {\n    case 'Point':\n      return new Point(renderFeature.getFlatCoordinates());\n    case 'MultiPoint':\n      return new MultiPoint(renderFeature.getFlatCoordinates(), 'XY');\n    case 'LineString':\n      return new LineString(renderFeature.getFlatCoordinates(), 'XY');\n    case 'MultiLineString':\n      return new MultiLineString(\n        renderFeature.getFlatCoordinates(),\n        'XY',\n        /** @type {Array<number>} */ (renderFeature.getEnds())\n      );\n    case 'Polygon':\n      const flatCoordinates = renderFeature.getFlatCoordinates();\n      const ends = /** @type {Array<number>} */ (renderFeature.getEnds());\n      const endss = inflateEnds(flatCoordinates, ends);\n      return endss.length > 1\n        ? new MultiPolygon(flatCoordinates, 'XY', endss)\n        : new Polygon(flatCoordinates, 'XY', ends);\n    default:\n      throw new Error('Invalid geometry type:' + geometryType);\n  }\n}\n\n/**\n * Create an `ol/Feature` from an `ol/render/Feature`\n * @param {RenderFeature} renderFeature RenderFeature\n * @param {string} [geometryName='geometry'] Geometry name to use\n * when creating the Feature.\n * @return {Feature} Newly constructed `ol/Feature` with properties,\n * geometry, and id copied over.\n * @api\n */\nexport function toFeature(renderFeature, geometryName) {\n  const id = renderFeature.getId();\n  const geometry = toGeometry(renderFeature);\n  const properties = renderFeature.getProperties();\n  const feature = new Feature();\n  if (geometryName !== undefined) {\n    feature.setGeometryName(geometryName);\n  }\n  feature.setGeometry(geometry);\n  if (id !== undefined) {\n    feature.setId(id);\n  }\n  feature.setProperties(properties, true);\n  return feature;\n}\n\nexport default RenderFeature;\n","/**\n * @module ol/proj/proj4\n */\nimport Projection from './Projection.js';\nimport {\n  addCoordinateTransforms,\n  addEquivalentProjections,\n  addProjection,\n  createSafeCoordinateTransform,\n  get,\n} from '../proj.js';\nimport {get as getTransform} from './transforms.js';\n\n/**\n * @type {import(\"proj4\")|null}\n */\nlet registered = null;\n\n/**\n * @return {boolean} Proj4 has been registered.\n */\nexport function isRegistered() {\n  return !!registered;\n}\n\n/**\n * Unsets the shared proj4 previously set with register.\n */\nexport function unregister() {\n  registered = null;\n}\n\n/**\n * Make projections defined in proj4 (with `proj4.defs()`) available in\n * OpenLayers. Requires proj4 >= 2.8.0.\n *\n * This function should be called whenever changes are made to the proj4\n * registry, e.g. after calling `proj4.defs()`. Existing transforms will not be\n * modified by this function.\n *\n * @param {import(\"proj4\")} proj4 Proj4.\n * @api\n */\nexport function register(proj4) {\n  registered = proj4;\n\n  const projCodes = Object.keys(proj4.defs);\n  const len = projCodes.length;\n  let i, j;\n  for (i = 0; i < len; ++i) {\n    const code = projCodes[i];\n    if (!get(code)) {\n      const def = proj4.defs(code);\n      let units = /** @type {import(\"./Units.js\").Units} */ (def.units);\n      if (!units && def.projName === 'longlat') {\n        units = 'degrees';\n      }\n      addProjection(\n        new Projection({\n          code: code,\n          axisOrientation: def.axis,\n          metersPerUnit: def.to_meter,\n          units,\n        })\n      );\n    }\n  }\n  for (i = 0; i < len; ++i) {\n    const code1 = projCodes[i];\n    const proj1 = get(code1);\n    for (j = 0; j < len; ++j) {\n      const code2 = projCodes[j];\n      const proj2 = get(code2);\n      if (!getTransform(code1, code2)) {\n        if (proj4.defs[code1] === proj4.defs[code2]) {\n          addEquivalentProjections([proj1, proj2]);\n        } else {\n          const transform = proj4(code1, code2);\n          addCoordinateTransforms(\n            proj1,\n            proj2,\n            createSafeCoordinateTransform(proj1, proj2, transform.forward),\n            createSafeCoordinateTransform(proj2, proj1, transform.inverse)\n          );\n        }\n      }\n    }\n  }\n}\n\n/**\n * @param {number} code The EPSG code.\n * @return {Promise<string>} The proj4 definition.\n */\nlet epsgLookup = async function (code) {\n  const response = await fetch(`https://epsg.io/${code}.proj4`);\n  if (!response.ok) {\n    throw new Error(`Unexpected response from epsg.io: ${response.status}`);\n  }\n  return response.text();\n};\n\n/**\n * Set the lookup function for getting proj4 definitions given an EPSG code.\n * By default, the {@link module:ol/proj/proj4.fromEPSGCode} function uses the\n * epsg.io website for proj4 definitions.  This can be changed by providing a\n * different lookup function.\n *\n * @param {function(number):Promise<string>} func The lookup function.\n * @api\n */\nexport function setEPSGLookup(func) {\n  epsgLookup = func;\n}\n\n/**\n * Get the current EPSG lookup function.\n *\n * @return {function(number):Promise<string>} The EPSG lookup function.\n */\nexport function getEPSGLookup() {\n  return epsgLookup;\n}\n\n/**\n * Get a projection from an EPSG code.  This function fetches the projection\n * definition from the epsg.io website, registers this definition for use with\n * proj4, and returns a configured projection.  You must call import proj4 and\n * call {@link module:ol/proj/proj4.register} before using this function.\n *\n * If the projection definition is already registered with proj4, it will not\n * be fetched again (so it is ok to call this function multiple times with the\n * same code).\n *\n * @param {number|string} code The EPSG code (e.g. 4326 or 'EPSG:4326').\n * @return {Promise<Projection>} The projection.\n * @api\n */\nexport async function fromEPSGCode(code) {\n  if (typeof code === 'string') {\n    code = parseInt(code.split(':').pop(), 10);\n  }\n\n  const proj4 = registered;\n  if (!proj4) {\n    throw new Error('Proj4 must be registered first with register(proj4)');\n  }\n\n  const epsgCode = 'EPSG:' + code;\n  if (proj4.defs(epsgCode)) {\n    return get(epsgCode);\n  }\n\n  proj4.defs(epsgCode, await epsgLookup(code));\n  register(proj4);\n\n  return get(epsgCode);\n}\n\n/**\n * Generate an EPSG lookup function which uses the MapTiler Coordinates API to find projection\n * definitions which do not require proj4 to be configured to handle `+nadgrids` parameters.\n * Call {@link module:ol/proj/proj4.setEPSGLookup} use the function for lookups\n * `setEPSGLookup(epsgLookupMapTiler('{YOUR_MAPTILER_API_KEY_HERE}'))`.\n *\n * @param {string} key MapTiler API key.  Get your own API key at https://www.maptiler.com/cloud/.\n * @return {function(number):Promise<string>} The EPSG lookup function.\n * @api\n */\nexport function epsgLookupMapTiler(key) {\n  return async function (code) {\n    const response = await fetch(\n      `https://api.maptiler.com/coordinates/search/code:${code}.json?transformations=true&exports=true&key=${key}`\n    );\n    if (!response.ok) {\n      throw new Error(\n        `Unexpected response from maptiler.com: ${response.status}`\n      );\n    }\n    return response.json().then((json) => {\n      const results = json['results'];\n      if (results?.length > 0) {\n        const result = results.filter(\n          (r) => r['id']?.['authority'] === 'EPSG' && r['id']?.['code'] === code\n        )[0];\n        if (result) {\n          const transforms = result['transformations'];\n          if (transforms?.length > 0) {\n            // use default transform if it does not require grids\n            const defaultTransform = result['default_transformation'];\n            if (\n              transforms.filter(\n                (t) =>\n                  t['id']?.['authority'] === defaultTransform?.['authority'] &&\n                  t['id']?.['code'] === defaultTransform?.['code'] &&\n                  t['grids']?.length === 0\n              ).length > 0\n            ) {\n              return result['exports']?.['proj4'];\n            }\n            // otherwise use most accurate alternative without grids\n            const transform = transforms\n              .filter(\n                (t) =>\n                  t['grids']?.length === 0 &&\n                  t['target_crs']?.['authority'] === 'EPSG' &&\n                  t['target_crs']?.['code'] === 4326 &&\n                  t['deprecated'] === false &&\n                  t['usable'] === true\n              )\n              .sort((t1, t2) => t1['accuracy'] - t2['accuracy'])[0]?.[\n              'exports'\n            ]?.['proj4'];\n            if (transform) {\n              return transform;\n            }\n          }\n          // fallback to default\n          return result['exports']?.['proj4'];\n        }\n      }\n    });\n  };\n}\n","/**\n * @module ol/layer/Vector\n */\nimport BaseVectorLayer from './BaseVector.js';\nimport CanvasVectorLayerRenderer from '../renderer/canvas/VectorLayer.js';\n\n/**\n * @classdesc\n * Vector data is rendered client-side, as vectors. This layer type provides most accurate rendering\n * even during animations. Points and labels stay upright on rotated views. For very large\n * amounts of vector data, performance may suffer during pan and zoom animations. In this case,\n * try {@link module:ol/layer/VectorImage~VectorImageLayer}.\n *\n * Note that any property set in the options is set as a {@link module:ol/Object~BaseObject}\n * property on the layer object; for example, setting `title: 'My Title'` in the\n * options means that `title` is observable, and has get/set accessors.\n *\n * @template {import(\"../source/Vector.js\").default} VectorSourceType\n * @extends {BaseVectorLayer<VectorSourceType, CanvasVectorLayerRenderer>}\n * @api\n */\nclass VectorLayer extends BaseVectorLayer {\n  /**\n   * @param {import(\"./BaseVector.js\").Options<VectorSourceType>} [options] Options.\n   */\n  constructor(options) {\n    super(options);\n  }\n\n  createRenderer() {\n    return new CanvasVectorLayerRenderer(this);\n  }\n}\n\nexport default VectorLayer;\n","/**\n * @module ol/geom/flat/geodesic\n */\nimport {get as getProjection, getTransform} from '../../proj.js';\nimport {squaredSegmentDistance, toDegrees, toRadians} from '../../math.js';\n\n/**\n * @param {function(number): import(\"../../coordinate.js\").Coordinate} interpolate Interpolate function.\n * @param {import(\"../../proj.js\").TransformFunction} transform Transform from longitude/latitude to\n *     projected coordinates.\n * @param {number} squaredTolerance Squared tolerance.\n * @return {Array<number>} Flat coordinates.\n */\nfunction line(interpolate, transform, squaredTolerance) {\n  // FIXME reduce garbage generation\n  // FIXME optimize stack operations\n\n  /** @type {Array<number>} */\n  const flatCoordinates = [];\n\n  let geoA = interpolate(0);\n  let geoB = interpolate(1);\n\n  let a = transform(geoA);\n  let b = transform(geoB);\n\n  /** @type {Array<import(\"../../coordinate.js\").Coordinate>} */\n  const geoStack = [geoB, geoA];\n  /** @type {Array<import(\"../../coordinate.js\").Coordinate>} */\n  const stack = [b, a];\n  /** @type {Array<number>} */\n  const fractionStack = [1, 0];\n\n  /** @type {!Object<string, boolean>} */\n  const fractions = {};\n\n  let maxIterations = 1e5;\n  let geoM, m, fracA, fracB, fracM, key;\n\n  while (--maxIterations > 0 && fractionStack.length > 0) {\n    // Pop the a coordinate off the stack\n    fracA = fractionStack.pop();\n    geoA = geoStack.pop();\n    a = stack.pop();\n    // Add the a coordinate if it has not been added yet\n    key = fracA.toString();\n    if (!(key in fractions)) {\n      flatCoordinates.push(a[0], a[1]);\n      fractions[key] = true;\n    }\n    // Pop the b coordinate off the stack\n    fracB = fractionStack.pop();\n    geoB = geoStack.pop();\n    b = stack.pop();\n    // Find the m point between the a and b coordinates\n    fracM = (fracA + fracB) / 2;\n    geoM = interpolate(fracM);\n    m = transform(geoM);\n    if (\n      squaredSegmentDistance(m[0], m[1], a[0], a[1], b[0], b[1]) <\n      squaredTolerance\n    ) {\n      // If the m point is sufficiently close to the straight line, then we\n      // discard it.  Just use the b coordinate and move on to the next line\n      // segment.\n      flatCoordinates.push(b[0], b[1]);\n      key = fracB.toString();\n      fractions[key] = true;\n    } else {\n      // Otherwise, we need to subdivide the current line segment.  Split it\n      // into two and push the two line segments onto the stack.\n      fractionStack.push(fracB, fracM, fracM, fracA);\n      stack.push(b, m, m, a);\n      geoStack.push(geoB, geoM, geoM, geoA);\n    }\n  }\n\n  return flatCoordinates;\n}\n\n/**\n * Generate a great-circle arcs between two lat/lon points.\n * @param {number} lon1 Longitude 1 in degrees.\n * @param {number} lat1 Latitude 1 in degrees.\n * @param {number} lon2 Longitude 2 in degrees.\n * @param {number} lat2 Latitude 2 in degrees.\n * @param {import(\"../../proj/Projection.js\").default} projection Projection.\n * @param {number} squaredTolerance Squared tolerance.\n * @return {Array<number>} Flat coordinates.\n */\nexport function greatCircleArc(\n  lon1,\n  lat1,\n  lon2,\n  lat2,\n  projection,\n  squaredTolerance\n) {\n  const geoProjection = getProjection('EPSG:4326');\n\n  const cosLat1 = Math.cos(toRadians(lat1));\n  const sinLat1 = Math.sin(toRadians(lat1));\n  const cosLat2 = Math.cos(toRadians(lat2));\n  const sinLat2 = Math.sin(toRadians(lat2));\n  const cosDeltaLon = Math.cos(toRadians(lon2 - lon1));\n  const sinDeltaLon = Math.sin(toRadians(lon2 - lon1));\n  const d = sinLat1 * sinLat2 + cosLat1 * cosLat2 * cosDeltaLon;\n\n  return line(\n    /**\n     * @param {number} frac Fraction.\n     * @return {import(\"../../coordinate.js\").Coordinate} Coordinate.\n     */\n    function (frac) {\n      if (1 <= d) {\n        return [lon2, lat2];\n      }\n      const D = frac * Math.acos(d);\n      const cosD = Math.cos(D);\n      const sinD = Math.sin(D);\n      const y = sinDeltaLon * cosLat2;\n      const x = cosLat1 * sinLat2 - sinLat1 * cosLat2 * cosDeltaLon;\n      const theta = Math.atan2(y, x);\n      const lat = Math.asin(sinLat1 * cosD + cosLat1 * sinD * Math.cos(theta));\n      const lon =\n        toRadians(lon1) +\n        Math.atan2(\n          Math.sin(theta) * sinD * cosLat1,\n          cosD - sinLat1 * Math.sin(lat)\n        );\n      return [toDegrees(lon), toDegrees(lat)];\n    },\n    getTransform(geoProjection, projection),\n    squaredTolerance\n  );\n}\n\n/**\n * Generate a meridian (line at constant longitude).\n * @param {number} lon Longitude.\n * @param {number} lat1 Latitude 1.\n * @param {number} lat2 Latitude 2.\n * @param {import(\"../../proj/Projection.js\").default} projection Projection.\n * @param {number} squaredTolerance Squared tolerance.\n * @return {Array<number>} Flat coordinates.\n */\nexport function meridian(lon, lat1, lat2, projection, squaredTolerance) {\n  const epsg4326Projection = getProjection('EPSG:4326');\n  return line(\n    /**\n     * @param {number} frac Fraction.\n     * @return {import(\"../../coordinate.js\").Coordinate} Coordinate.\n     */\n    function (frac) {\n      return [lon, lat1 + (lat2 - lat1) * frac];\n    },\n    getTransform(epsg4326Projection, projection),\n    squaredTolerance\n  );\n}\n\n/**\n * Generate a parallel (line at constant latitude).\n * @param {number} lat Latitude.\n * @param {number} lon1 Longitude 1.\n * @param {number} lon2 Longitude 2.\n * @param {import(\"../../proj/Projection.js\").default} projection Projection.\n * @param {number} squaredTolerance Squared tolerance.\n * @return {Array<number>} Flat coordinates.\n */\nexport function parallel(lat, lon1, lon2, projection, squaredTolerance) {\n  const epsg4326Projection = getProjection('EPSG:4326');\n  return line(\n    /**\n     * @param {number} frac Fraction.\n     * @return {import(\"../../coordinate.js\").Coordinate} Coordinate.\n     */\n    function (frac) {\n      return [lon1 + (lon2 - lon1) * frac, lat];\n    },\n    getTransform(epsg4326Projection, projection),\n    squaredTolerance\n  );\n}\n","/**\n * @module ol/layer/Graticule\n */\nimport Collection from '../Collection.js';\nimport EventType from '../render/EventType.js';\nimport Feature from '../Feature.js';\nimport Fill from '../style/Fill.js';\nimport LineString from '../geom/LineString.js';\nimport Point from '../geom/Point.js';\nimport Stroke from '../style/Stroke.js';\nimport Style from '../style/Style.js';\nimport Text from '../style/Text.js';\nimport VectorLayer from './Vector.js';\nimport VectorSource from '../source/Vector.js';\nimport {\n  applyTransform,\n  approximatelyEquals,\n  containsCoordinate,\n  containsExtent,\n  equals,\n  getCenter,\n  getIntersection,\n  getWidth,\n  intersects,\n  isEmpty,\n  wrapX as wrapExtentX,\n} from '../extent.js';\nimport {clamp} from '../math.js';\nimport {degreesToStringHDMS} from '../coordinate.js';\nimport {\n  equivalent as equivalentProjection,\n  get as getProjection,\n  getTransform,\n} from '../proj.js';\nimport {getVectorContext} from '../render.js';\nimport {meridian, parallel} from '../geom/flat/geodesic.js';\n\n/**\n * @type {Stroke}\n * @private\n * @const\n */\nconst DEFAULT_STROKE_STYLE = new Stroke({\n  color: 'rgba(0,0,0,0.2)',\n});\n\n/**\n * @type {Array<number>}\n * @private\n */\nconst INTERVALS = [\n  90,\n  45,\n  30,\n  20,\n  10,\n  5,\n  2,\n  1,\n  30 / 60,\n  20 / 60,\n  10 / 60,\n  5 / 60,\n  2 / 60,\n  1 / 60,\n  30 / 3600,\n  20 / 3600,\n  10 / 3600,\n  5 / 3600,\n  2 / 3600,\n  1 / 3600,\n];\n\n/**\n * @typedef {Object} GraticuleLabelDataType\n * @property {Point} geom Geometry.\n * @property {string} text Text.\n */\n\n/**\n * @typedef {Object} Options\n * @property {string} [className='ol-layer'] A CSS class name to set to the layer element.\n * @property {number} [opacity=1] Opacity (0, 1).\n * @property {boolean} [visible=true] Visibility.\n * @property {import(\"../extent.js\").Extent} [extent] The bounding extent for layer rendering.  The layer will not be\n * rendered outside of this extent.\n * @property {number} [zIndex] The z-index for layer rendering.  At rendering time, the layers\n * will be ordered, first by Z-index and then by position. When `undefined`, a `zIndex` of 0 is assumed\n * for layers that are added to the map's `layers` collection, or `Infinity` when the layer's `setMap()`\n * method was used.\n * @property {number} [minResolution] The minimum resolution (inclusive) at which this layer will be\n * visible.\n * @property {number} [maxResolution] The maximum resolution (exclusive) below which this layer will\n * be visible.\n * @property {number} [minZoom] The minimum view zoom level (exclusive) above which this layer will be\n * visible.\n * @property {number} [maxZoom] The maximum view zoom level (inclusive) at which this layer will\n * be visible.\n * @property {number} [maxLines=100] The maximum number of meridians and\n * parallels from the center of the map. The default value of 100 means that at\n * most 200 meridians and 200 parallels will be displayed. The default value is\n * appropriate for conformal projections like Spherical Mercator. If you\n * increase the value, more lines will be drawn and the drawing performance will\n * decrease.\n * @property {Stroke} [strokeStyle] The\n * stroke style to use for drawing the graticule. If not provided, the following stroke will be used:\n * ```js\n * new Stroke({\n *   color: 'rgba(0, 0, 0, 0.2)' // a not fully opaque black\n * });\n * ```\n * @property {number} [targetSize=100] The target size of the graticule cells,\n * in pixels.\n * @property {boolean} [showLabels=false] Render a label with the respective\n * latitude/longitude for each graticule line.\n * @property {function(number):string} [lonLabelFormatter] Label formatter for\n * longitudes. This function is called with the longitude as argument, and\n * should return a formatted string representing the longitude. By default,\n * labels are formatted as degrees, minutes, seconds and hemisphere.\n * @property {function(number):string} [latLabelFormatter] Label formatter for\n * latitudes. This function is called with the latitude as argument, and\n * should return a formatted string representing the latitude. By default,\n * labels are formatted as degrees, minutes, seconds and hemisphere.\n * @property {number} [lonLabelPosition=0] Longitude label position in fractions\n * (0..1) of view extent. 0 means at the bottom of the viewport, 1 means at the\n * top.\n * @property {number} [latLabelPosition=1] Latitude label position in fractions\n * (0..1) of view extent. 0 means at the left of the viewport, 1 means at the\n * right.\n * @property {Text} [lonLabelStyle] Longitude label text\n * style. If not provided, the following style will be used:\n * ```js\n * new Text({\n *   font: '12px Calibri,sans-serif',\n *   textBaseline: 'bottom',\n *   fill: new Fill({\n *     color: 'rgba(0,0,0,1)'\n *   }),\n *   stroke: new Stroke({\n *     color: 'rgba(255,255,255,1)',\n *     width: 3\n *   })\n * });\n * ```\n * Note that the default's `textBaseline` configuration will not work well for\n * `lonLabelPosition` configurations that position labels close to the top of\n * the viewport.\n * @property {Text} [latLabelStyle] Latitude label text style.\n * If not provided, the following style will be used:\n * ```js\n * new Text({\n *   font: '12px Calibri,sans-serif',\n *   textAlign: 'end',\n *   fill: new Fill({\n *     color: 'rgba(0,0,0,1)'\n *   }),\n *   stroke: Stroke({\n *     color: 'rgba(255,255,255,1)',\n *     width: 3\n *   })\n * });\n * ```\n * Note that the default's `textAlign` configuration will not work well for\n * `latLabelPosition` configurations that position labels close to the left of\n * the viewport.\n * @property {Array<number>} [intervals=[90, 45, 30, 20, 10, 5, 2, 1, 30/60, 20/60, 10/60, 5/60, 2/60, 1/60, 30/3600, 20/3600, 10/3600, 5/3600, 2/3600, 1/3600]]\n * Intervals (in degrees) for the graticule. Example to limit graticules to 30 and 10 degrees intervals:\n * ```js\n * [30, 10]\n * ```\n * @property {boolean} [wrapX=true] Whether to repeat the graticule horizontally.\n * @property {Object<string, *>} [properties] Arbitrary observable properties. Can be accessed with `#get()` and `#set()`.\n */\n\n/**\n * @classdesc\n * Layer that renders a grid for a coordinate system (currently only EPSG:4326 is supported).\n * Note that the view projection must define both extent and worldExtent.\n *\n * @fires import(\"../render/Event.js\").RenderEvent\n * @extends {VectorLayer<import(\"../source/Vector.js\").default>}\n * @api\n */\nclass Graticule extends VectorLayer {\n  /**\n   * @param {Options} [options] Options.\n   */\n  constructor(options) {\n    options = options ? options : {};\n\n    const baseOptions = Object.assign(\n      {\n        updateWhileAnimating: true,\n        updateWhileInteracting: true,\n        renderBuffer: 0,\n      },\n      options\n    );\n\n    delete baseOptions.maxLines;\n    delete baseOptions.strokeStyle;\n    delete baseOptions.targetSize;\n    delete baseOptions.showLabels;\n    delete baseOptions.lonLabelFormatter;\n    delete baseOptions.latLabelFormatter;\n    delete baseOptions.lonLabelPosition;\n    delete baseOptions.latLabelPosition;\n    delete baseOptions.lonLabelStyle;\n    delete baseOptions.latLabelStyle;\n    delete baseOptions.intervals;\n    super(baseOptions);\n\n    /**\n     * @type {import(\"../proj/Projection.js\").default}\n     */\n    this.projection_ = null;\n\n    /**\n     * @type {number}\n     * @private\n     */\n    this.maxLat_ = Infinity;\n\n    /**\n     * @type {number}\n     * @private\n     */\n    this.maxLon_ = Infinity;\n\n    /**\n     * @type {number}\n     * @private\n     */\n    this.minLat_ = -Infinity;\n\n    /**\n     * @type {number}\n     * @private\n     */\n    this.minLon_ = -Infinity;\n\n    /**\n     * @type {number}\n     * @private\n     */\n    this.maxX_ = Infinity;\n\n    /**\n     * @type {number}\n     * @private\n     */\n    this.maxY_ = Infinity;\n\n    /**\n     * @type {number}\n     * @private\n     */\n    this.minX_ = -Infinity;\n\n    /**\n     * @type {number}\n     * @private\n     */\n    this.minY_ = -Infinity;\n\n    /**\n     * @type {number}\n     * @private\n     */\n    this.targetSize_ =\n      options.targetSize !== undefined ? options.targetSize : 100;\n\n    /**\n     * @type {number}\n     * @private\n     */\n    this.maxLines_ = options.maxLines !== undefined ? options.maxLines : 100;\n\n    /**\n     * @type {Array<LineString>}\n     * @private\n     */\n    this.meridians_ = [];\n\n    /**\n     * @type {Array<LineString>}\n     * @private\n     */\n    this.parallels_ = [];\n\n    /**\n     * @type {Stroke}\n     * @private\n     */\n    this.strokeStyle_ =\n      options.strokeStyle !== undefined\n        ? options.strokeStyle\n        : DEFAULT_STROKE_STYLE;\n\n    /**\n     * @type {import(\"../proj.js\").TransformFunction|undefined}\n     * @private\n     */\n    this.fromLonLatTransform_ = undefined;\n\n    /**\n     * @type {import(\"../proj.js\").TransformFunction|undefined}\n     * @private\n     */\n    this.toLonLatTransform_ = undefined;\n\n    /**\n     * @type {import(\"../coordinate.js\").Coordinate}\n     * @private\n     */\n    this.projectionCenterLonLat_ = null;\n\n    /**\n     * @type {import(\"../coordinate.js\").Coordinate}\n     * @private\n     */\n    this.bottomLeft_ = null;\n\n    /**\n     * @type {import(\"../coordinate.js\").Coordinate}\n     * @private\n     */\n    this.bottomRight_ = null;\n\n    /**\n     * @type {import(\"../coordinate.js\").Coordinate}\n     * @private\n     */\n    this.topLeft_ = null;\n\n    /**\n     * @type {import(\"../coordinate.js\").Coordinate}\n     * @private\n     */\n    this.topRight_ = null;\n\n    /**\n     * @type {Array<GraticuleLabelDataType>}\n     * @private\n     */\n    this.meridiansLabels_ = null;\n\n    /**\n     * @type {Array<GraticuleLabelDataType>}\n     * @private\n     */\n    this.parallelsLabels_ = null;\n\n    if (options.showLabels) {\n      /**\n       * @type {null|function(number):string}\n       * @private\n       */\n      this.lonLabelFormatter_ =\n        options.lonLabelFormatter == undefined\n          ? degreesToStringHDMS.bind(this, 'EW')\n          : options.lonLabelFormatter;\n\n      /**\n       * @type {function(number):string}\n       * @private\n       */\n      this.latLabelFormatter_ =\n        options.latLabelFormatter == undefined\n          ? degreesToStringHDMS.bind(this, 'NS')\n          : options.latLabelFormatter;\n\n      /**\n       * Longitude label position in fractions (0..1) of view extent. 0 means\n       * bottom, 1 means top.\n       * @type {number}\n       * @private\n       */\n      this.lonLabelPosition_ =\n        options.lonLabelPosition == undefined ? 0 : options.lonLabelPosition;\n\n      /**\n       * Latitude Label position in fractions (0..1) of view extent. 0 means left, 1\n       * means right.\n       * @type {number}\n       * @private\n       */\n      this.latLabelPosition_ =\n        options.latLabelPosition == undefined ? 1 : options.latLabelPosition;\n\n      /**\n       * @type {Style}\n       * @private\n       */\n      this.lonLabelStyleBase_ = new Style({\n        text:\n          options.lonLabelStyle !== undefined\n            ? options.lonLabelStyle.clone()\n            : new Text({\n                font: '12px Calibri,sans-serif',\n                textBaseline: 'bottom',\n                fill: new Fill({\n                  color: 'rgba(0,0,0,1)',\n                }),\n                stroke: new Stroke({\n                  color: 'rgba(255,255,255,1)',\n                  width: 3,\n                }),\n              }),\n      });\n\n      /**\n       * @private\n       * @param {import(\"../Feature\").default} feature Feature\n       * @return {Style} style\n       */\n      this.lonLabelStyle_ = (feature) => {\n        const label = feature.get('graticule_label');\n        this.lonLabelStyleBase_.getText().setText(label);\n        return this.lonLabelStyleBase_;\n      };\n\n      /**\n       * @type {Style}\n       * @private\n       */\n      this.latLabelStyleBase_ = new Style({\n        text:\n          options.latLabelStyle !== undefined\n            ? options.latLabelStyle.clone()\n            : new Text({\n                font: '12px Calibri,sans-serif',\n                textAlign: 'right',\n                fill: new Fill({\n                  color: 'rgba(0,0,0,1)',\n                }),\n                stroke: new Stroke({\n                  color: 'rgba(255,255,255,1)',\n                  width: 3,\n                }),\n              }),\n      });\n\n      /**\n       * @private\n       * @param {import(\"../Feature\").default} feature Feature\n       * @return {Style} style\n       */\n      this.latLabelStyle_ = (feature) => {\n        const label = feature.get('graticule_label');\n        this.latLabelStyleBase_.getText().setText(label);\n        return this.latLabelStyleBase_;\n      };\n\n      this.meridiansLabels_ = [];\n      this.parallelsLabels_ = [];\n\n      this.addEventListener(EventType.POSTRENDER, this.drawLabels_.bind(this));\n    }\n\n    /**\n     * @type {Array<number>}\n     * @private\n     */\n    this.intervals_ =\n      options.intervals !== undefined ? options.intervals : INTERVALS;\n\n    // use a source with a custom loader for lines & text\n    this.setSource(\n      new VectorSource({\n        loader: this.loaderFunction.bind(this),\n        strategy: this.strategyFunction.bind(this),\n        features: new Collection(),\n        overlaps: false,\n        useSpatialIndex: false,\n        wrapX: options.wrapX,\n      })\n    );\n\n    /**\n     * feature pool to use when updating graticule\n     * @type {Array<Feature>}\n     * @private\n     */\n    this.featurePool_ = [];\n\n    /**\n     * @type {Style}\n     * @private\n     */\n    this.lineStyle_ = new Style({\n      stroke: this.strokeStyle_,\n    });\n\n    /**\n     * @type {?import(\"../extent.js\").Extent}\n     * @private\n     */\n    this.loadedExtent_ = null;\n\n    /**\n     * @type {?import(\"../extent.js\").Extent}\n     * @private\n     */\n    this.renderedExtent_ = null;\n\n    /**\n     * @type {?number}\n     * @private\n     */\n    this.renderedResolution_ = null;\n\n    this.setRenderOrder(null);\n  }\n\n  /**\n   * Strategy function for loading features based on the view's extent and\n   * resolution.\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @param {number} resolution Resolution.\n   * @return {Array<import(\"../extent.js\").Extent>} Extents.\n   */\n  strategyFunction(extent, resolution) {\n    // extents may be passed in different worlds, to avoid endless loop we use only one\n    let realWorldExtent = extent.slice();\n    if (this.projection_ && this.getSource().getWrapX()) {\n      wrapExtentX(realWorldExtent, this.projection_);\n    }\n    if (this.loadedExtent_) {\n      if (\n        approximatelyEquals(this.loadedExtent_, realWorldExtent, resolution)\n      ) {\n        // make sure result is exactly equal to previous extent\n        realWorldExtent = this.loadedExtent_.slice();\n      } else {\n        // we should not keep track of loaded extents\n        this.getSource().removeLoadedExtent(this.loadedExtent_);\n      }\n    }\n    return [realWorldExtent];\n  }\n\n  /**\n   * Update geometries in the source based on current view\n   * @param {import(\"../extent\").Extent} extent Extent\n   * @param {number} resolution Resolution\n   * @param {import(\"../proj/Projection.js\").default} projection Projection\n   */\n  loaderFunction(extent, resolution, projection) {\n    this.loadedExtent_ = extent;\n    const source = this.getSource();\n\n    // only consider the intersection between our own extent & the requested one\n    const layerExtent = this.getExtent() || [\n      -Infinity,\n      -Infinity,\n      Infinity,\n      Infinity,\n    ];\n    const renderExtent = getIntersection(layerExtent, extent);\n\n    if (\n      this.renderedExtent_ &&\n      equals(this.renderedExtent_, renderExtent) &&\n      this.renderedResolution_ === resolution\n    ) {\n      return;\n    }\n    this.renderedExtent_ = renderExtent;\n    this.renderedResolution_ = resolution;\n\n    // bail out if nothing to render\n    if (isEmpty(renderExtent)) {\n      return;\n    }\n\n    // update projection info\n    const center = getCenter(renderExtent);\n    const squaredTolerance = (resolution * resolution) / 4;\n\n    const updateProjectionInfo =\n      !this.projection_ || !equivalentProjection(this.projection_, projection);\n\n    if (updateProjectionInfo) {\n      this.updateProjectionInfo_(projection);\n    }\n\n    this.createGraticule_(renderExtent, center, resolution, squaredTolerance);\n\n    // first make sure we have enough features in the pool\n    let featureCount = this.meridians_.length + this.parallels_.length;\n    if (this.meridiansLabels_) {\n      featureCount += this.meridians_.length;\n    }\n    if (this.parallelsLabels_) {\n      featureCount += this.parallels_.length;\n    }\n\n    let feature;\n    while (featureCount > this.featurePool_.length) {\n      feature = new Feature();\n      this.featurePool_.push(feature);\n    }\n\n    const featuresColl = source.getFeaturesCollection();\n    featuresColl.clear();\n    let poolIndex = 0;\n\n    // add features for the lines & labels\n    let i, l;\n    for (i = 0, l = this.meridians_.length; i < l; ++i) {\n      feature = this.featurePool_[poolIndex++];\n      feature.setGeometry(this.meridians_[i]);\n      feature.setStyle(this.lineStyle_);\n      featuresColl.push(feature);\n    }\n    for (i = 0, l = this.parallels_.length; i < l; ++i) {\n      feature = this.featurePool_[poolIndex++];\n      feature.setGeometry(this.parallels_[i]);\n      feature.setStyle(this.lineStyle_);\n      featuresColl.push(feature);\n    }\n  }\n\n  /**\n   * @param {number} lon Longitude.\n   * @param {number} minLat Minimal latitude.\n   * @param {number} maxLat Maximal latitude.\n   * @param {number} squaredTolerance Squared tolerance.\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @param {number} index Index.\n   * @return {number} Index.\n   * @private\n   */\n  addMeridian_(lon, minLat, maxLat, squaredTolerance, extent, index) {\n    const lineString = this.getMeridian_(\n      lon,\n      minLat,\n      maxLat,\n      squaredTolerance,\n      index\n    );\n    if (intersects(lineString.getExtent(), extent)) {\n      if (this.meridiansLabels_) {\n        const text = this.lonLabelFormatter_(lon);\n        if (index in this.meridiansLabels_) {\n          this.meridiansLabels_[index].text = text;\n        } else {\n          this.meridiansLabels_[index] = {\n            geom: new Point([]),\n            text: text,\n          };\n        }\n      }\n      this.meridians_[index++] = lineString;\n    }\n    return index;\n  }\n\n  /**\n   * @param {number} lat Latitude.\n   * @param {number} minLon Minimal longitude.\n   * @param {number} maxLon Maximal longitude.\n   * @param {number} squaredTolerance Squared tolerance.\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @param {number} index Index.\n   * @return {number} Index.\n   * @private\n   */\n  addParallel_(lat, minLon, maxLon, squaredTolerance, extent, index) {\n    const lineString = this.getParallel_(\n      lat,\n      minLon,\n      maxLon,\n      squaredTolerance,\n      index\n    );\n    if (intersects(lineString.getExtent(), extent)) {\n      if (this.parallelsLabels_) {\n        const text = this.latLabelFormatter_(lat);\n        if (index in this.parallelsLabels_) {\n          this.parallelsLabels_[index].text = text;\n        } else {\n          this.parallelsLabels_[index] = {\n            geom: new Point([]),\n            text: text,\n          };\n        }\n      }\n      this.parallels_[index++] = lineString;\n    }\n    return index;\n  }\n\n  /**\n   * @param {import(\"../render/Event.js\").default} event Render event.\n   * @private\n   */\n  drawLabels_(event) {\n    const rotation = event.frameState.viewState.rotation;\n    const resolution = event.frameState.viewState.resolution;\n    const size = event.frameState.size;\n    const extent = event.frameState.extent;\n    const rotationCenter = getCenter(extent);\n    let rotationExtent = extent;\n    if (rotation) {\n      const unrotatedWidth = size[0] * resolution;\n      const unrotatedHeight = size[1] * resolution;\n      rotationExtent = [\n        rotationCenter[0] - unrotatedWidth / 2,\n        rotationCenter[1] - unrotatedHeight / 2,\n        rotationCenter[0] + unrotatedWidth / 2,\n        rotationCenter[1] + unrotatedHeight / 2,\n      ];\n    }\n\n    let startWorld = 0;\n    let endWorld = 0;\n    let labelsAtStart = this.latLabelPosition_ < 0.5;\n    const projectionExtent = this.projection_.getExtent();\n    const worldWidth = getWidth(projectionExtent);\n    if (\n      this.getSource().getWrapX() &&\n      this.projection_.canWrapX() &&\n      !containsExtent(projectionExtent, extent)\n    ) {\n      startWorld = Math.floor((extent[0] - projectionExtent[0]) / worldWidth);\n      endWorld = Math.ceil((extent[2] - projectionExtent[2]) / worldWidth);\n      const inverted = Math.abs(rotation) > Math.PI / 2;\n      labelsAtStart = labelsAtStart !== inverted;\n    }\n    const vectorContext = getVectorContext(event);\n\n    for (let world = startWorld; world <= endWorld; ++world) {\n      let poolIndex = this.meridians_.length + this.parallels_.length;\n      let feature, index, l, textPoint;\n\n      if (this.meridiansLabels_) {\n        for (index = 0, l = this.meridiansLabels_.length; index < l; ++index) {\n          const lineString = this.meridians_[index];\n          if (!rotation && world === 0) {\n            textPoint = this.getMeridianPoint_(lineString, extent, index);\n          } else {\n            const clone = lineString.clone();\n            clone.translate(world * worldWidth, 0);\n            clone.rotate(-rotation, rotationCenter);\n            textPoint = this.getMeridianPoint_(clone, rotationExtent, index);\n            textPoint.rotate(rotation, rotationCenter);\n          }\n          feature = this.featurePool_[poolIndex++];\n          feature.setGeometry(textPoint);\n          feature.set('graticule_label', this.meridiansLabels_[index].text);\n          vectorContext.drawFeature(feature, this.lonLabelStyle_(feature));\n        }\n      }\n      if (this.parallelsLabels_) {\n        if (\n          (world === startWorld && labelsAtStart) ||\n          (world === endWorld && !labelsAtStart)\n        ) {\n          for (index = 0, l = this.parallels_.length; index < l; ++index) {\n            const lineString = this.parallels_[index];\n            if (!rotation && world === 0) {\n              textPoint = this.getParallelPoint_(lineString, extent, index);\n            } else {\n              const clone = lineString.clone();\n              clone.translate(world * worldWidth, 0);\n              clone.rotate(-rotation, rotationCenter);\n              textPoint = this.getParallelPoint_(clone, rotationExtent, index);\n              textPoint.rotate(rotation, rotationCenter);\n            }\n            feature = this.featurePool_[poolIndex++];\n            feature.setGeometry(textPoint);\n            feature.set('graticule_label', this.parallelsLabels_[index].text);\n            vectorContext.drawFeature(feature, this.latLabelStyle_(feature));\n          }\n        }\n      }\n    }\n  }\n\n  /**\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @param {import(\"../coordinate.js\").Coordinate} center Center.\n   * @param {number} resolution Resolution.\n   * @param {number} squaredTolerance Squared tolerance.\n   * @private\n   */\n  createGraticule_(extent, center, resolution, squaredTolerance) {\n    const interval = this.getInterval_(resolution);\n    if (interval == -1) {\n      this.meridians_.length = 0;\n      this.parallels_.length = 0;\n      if (this.meridiansLabels_) {\n        this.meridiansLabels_.length = 0;\n      }\n      if (this.parallelsLabels_) {\n        this.parallelsLabels_.length = 0;\n      }\n      return;\n    }\n\n    let wrapX = false;\n    const projectionExtent = this.projection_.getExtent();\n    const worldWidth = getWidth(projectionExtent);\n    if (\n      this.getSource().getWrapX() &&\n      this.projection_.canWrapX() &&\n      !containsExtent(projectionExtent, extent)\n    ) {\n      if (getWidth(extent) >= worldWidth) {\n        extent[0] = projectionExtent[0];\n        extent[2] = projectionExtent[2];\n      } else {\n        wrapX = true;\n      }\n    }\n\n    // Constrain the center to fit into the extent available to the graticule\n\n    const validCenterP = [\n      clamp(center[0], this.minX_, this.maxX_),\n      clamp(center[1], this.minY_, this.maxY_),\n    ];\n\n    // Transform the center to lon lat\n    // Some projections may have a void area at the poles\n    // so replace any NaN latitudes with the min or max value closest to a pole\n\n    const centerLonLat = this.toLonLatTransform_(validCenterP);\n    if (isNaN(centerLonLat[1])) {\n      centerLonLat[1] =\n        Math.abs(this.maxLat_) >= Math.abs(this.minLat_)\n          ? this.maxLat_\n          : this.minLat_;\n    }\n    let centerLon = clamp(centerLonLat[0], this.minLon_, this.maxLon_);\n    let centerLat = clamp(centerLonLat[1], this.minLat_, this.maxLat_);\n    const maxLines = this.maxLines_;\n    let cnt, idx, lat, lon;\n\n    // Limit the extent to fit into the extent available to the graticule\n\n    let validExtentP = extent;\n    if (!wrapX) {\n      validExtentP = [\n        clamp(extent[0], this.minX_, this.maxX_),\n        clamp(extent[1], this.minY_, this.maxY_),\n        clamp(extent[2], this.minX_, this.maxX_),\n        clamp(extent[3], this.minY_, this.maxY_),\n      ];\n    }\n\n    // Transform the extent to get the lon lat ranges for the edges of the extent\n\n    const validExtent = applyTransform(\n      validExtentP,\n      this.toLonLatTransform_,\n      undefined,\n      8\n    );\n\n    let maxLat = validExtent[3];\n    let maxLon = validExtent[2];\n    let minLat = validExtent[1];\n    let minLon = validExtent[0];\n\n    if (!wrapX) {\n      // Check if extremities of the world extent lie inside the extent\n      // (for example the pole in a polar projection)\n      // and extend the extent as appropriate\n\n      if (containsCoordinate(validExtentP, this.bottomLeft_)) {\n        minLon = this.minLon_;\n        minLat = this.minLat_;\n      }\n      if (containsCoordinate(validExtentP, this.bottomRight_)) {\n        maxLon = this.maxLon_;\n        minLat = this.minLat_;\n      }\n      if (containsCoordinate(validExtentP, this.topLeft_)) {\n        minLon = this.minLon_;\n        maxLat = this.maxLat_;\n      }\n      if (containsCoordinate(validExtentP, this.topRight_)) {\n        maxLon = this.maxLon_;\n        maxLat = this.maxLat_;\n      }\n\n      // The transformed center may also extend the lon lat ranges used for rendering\n\n      maxLat = clamp(maxLat, centerLat, this.maxLat_);\n      maxLon = clamp(maxLon, centerLon, this.maxLon_);\n      minLat = clamp(minLat, this.minLat_, centerLat);\n      minLon = clamp(minLon, this.minLon_, centerLon);\n    }\n\n    // Create meridians\n\n    centerLon = Math.floor(centerLon / interval) * interval;\n    lon = clamp(centerLon, this.minLon_, this.maxLon_);\n\n    idx = this.addMeridian_(lon, minLat, maxLat, squaredTolerance, extent, 0);\n\n    cnt = 0;\n    if (wrapX) {\n      while ((lon -= interval) >= minLon && cnt++ < maxLines) {\n        idx = this.addMeridian_(\n          lon,\n          minLat,\n          maxLat,\n          squaredTolerance,\n          extent,\n          idx\n        );\n      }\n    } else {\n      while (lon != this.minLon_ && cnt++ < maxLines) {\n        lon = Math.max(lon - interval, this.minLon_);\n        idx = this.addMeridian_(\n          lon,\n          minLat,\n          maxLat,\n          squaredTolerance,\n          extent,\n          idx\n        );\n      }\n    }\n\n    lon = clamp(centerLon, this.minLon_, this.maxLon_);\n\n    cnt = 0;\n    if (wrapX) {\n      while ((lon += interval) <= maxLon && cnt++ < maxLines) {\n        idx = this.addMeridian_(\n          lon,\n          minLat,\n          maxLat,\n          squaredTolerance,\n          extent,\n          idx\n        );\n      }\n    } else {\n      while (lon != this.maxLon_ && cnt++ < maxLines) {\n        lon = Math.min(lon + interval, this.maxLon_);\n        idx = this.addMeridian_(\n          lon,\n          minLat,\n          maxLat,\n          squaredTolerance,\n          extent,\n          idx\n        );\n      }\n    }\n\n    this.meridians_.length = idx;\n    if (this.meridiansLabels_) {\n      this.meridiansLabels_.length = idx;\n    }\n\n    // Create parallels\n\n    centerLat = Math.floor(centerLat / interval) * interval;\n    lat = clamp(centerLat, this.minLat_, this.maxLat_);\n\n    idx = this.addParallel_(lat, minLon, maxLon, squaredTolerance, extent, 0);\n\n    cnt = 0;\n    while (lat != this.minLat_ && cnt++ < maxLines) {\n      lat = Math.max(lat - interval, this.minLat_);\n      idx = this.addParallel_(\n        lat,\n        minLon,\n        maxLon,\n        squaredTolerance,\n        extent,\n        idx\n      );\n    }\n\n    lat = clamp(centerLat, this.minLat_, this.maxLat_);\n\n    cnt = 0;\n    while (lat != this.maxLat_ && cnt++ < maxLines) {\n      lat = Math.min(lat + interval, this.maxLat_);\n      idx = this.addParallel_(\n        lat,\n        minLon,\n        maxLon,\n        squaredTolerance,\n        extent,\n        idx\n      );\n    }\n\n    this.parallels_.length = idx;\n    if (this.parallelsLabels_) {\n      this.parallelsLabels_.length = idx;\n    }\n  }\n\n  /**\n   * @param {number} resolution Resolution.\n   * @return {number} The interval in degrees.\n   * @private\n   */\n  getInterval_(resolution) {\n    const centerLon = this.projectionCenterLonLat_[0];\n    const centerLat = this.projectionCenterLonLat_[1];\n    let interval = -1;\n    const target = Math.pow(this.targetSize_ * resolution, 2);\n    /** @type {Array<number>} **/\n    const p1 = [];\n    /** @type {Array<number>} **/\n    const p2 = [];\n    for (let i = 0, ii = this.intervals_.length; i < ii; ++i) {\n      const delta = clamp(this.intervals_[i] / 2, 0, 90);\n      // Don't attempt to transform latitudes beyond the poles!\n      const clampedLat = clamp(centerLat, -90 + delta, 90 - delta);\n      p1[0] = centerLon - delta;\n      p1[1] = clampedLat - delta;\n      p2[0] = centerLon + delta;\n      p2[1] = clampedLat + delta;\n      this.fromLonLatTransform_(p1, p1);\n      this.fromLonLatTransform_(p2, p2);\n      const dist = Math.pow(p2[0] - p1[0], 2) + Math.pow(p2[1] - p1[1], 2);\n      if (dist <= target) {\n        break;\n      }\n      interval = this.intervals_[i];\n    }\n    return interval;\n  }\n\n  /**\n   * @param {number} lon Longitude.\n   * @param {number} minLat Minimal latitude.\n   * @param {number} maxLat Maximal latitude.\n   * @param {number} squaredTolerance Squared tolerance.\n   * @return {LineString} The meridian line string.\n   * @param {number} index Index.\n   * @private\n   */\n  getMeridian_(lon, minLat, maxLat, squaredTolerance, index) {\n    const flatCoordinates = meridian(\n      lon,\n      minLat,\n      maxLat,\n      this.projection_,\n      squaredTolerance\n    );\n    let lineString = this.meridians_[index];\n    if (!lineString) {\n      lineString = new LineString(flatCoordinates, 'XY');\n      this.meridians_[index] = lineString;\n    } else {\n      lineString.setFlatCoordinates('XY', flatCoordinates);\n      lineString.changed();\n    }\n    return lineString;\n  }\n\n  /**\n   * @param {LineString} lineString Meridian\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @param {number} index Index.\n   * @return {Point} Meridian point.\n   * @private\n   */\n  getMeridianPoint_(lineString, extent, index) {\n    const flatCoordinates = lineString.getFlatCoordinates();\n    let bottom = 1;\n    let top = flatCoordinates.length - 1;\n    if (flatCoordinates[bottom] > flatCoordinates[top]) {\n      bottom = top;\n      top = 1;\n    }\n    const clampedBottom = Math.max(extent[1], flatCoordinates[bottom]);\n    const clampedTop = Math.min(extent[3], flatCoordinates[top]);\n    const lat = clamp(\n      extent[1] + Math.abs(extent[1] - extent[3]) * this.lonLabelPosition_,\n      clampedBottom,\n      clampedTop\n    );\n    const coordinate0 =\n      flatCoordinates[bottom - 1] +\n      ((flatCoordinates[top - 1] - flatCoordinates[bottom - 1]) *\n        (lat - flatCoordinates[bottom])) /\n        (flatCoordinates[top] - flatCoordinates[bottom]);\n    const coordinate = [coordinate0, lat];\n    const point = this.meridiansLabels_[index].geom;\n    point.setCoordinates(coordinate);\n    return point;\n  }\n\n  /**\n   * Get the list of meridians.  Meridians are lines of equal longitude.\n   * @return {Array<LineString>} The meridians.\n   * @api\n   */\n  getMeridians() {\n    return this.meridians_;\n  }\n\n  /**\n   * @param {number} lat Latitude.\n   * @param {number} minLon Minimal longitude.\n   * @param {number} maxLon Maximal longitude.\n   * @param {number} squaredTolerance Squared tolerance.\n   * @return {LineString} The parallel line string.\n   * @param {number} index Index.\n   * @private\n   */\n  getParallel_(lat, minLon, maxLon, squaredTolerance, index) {\n    const flatCoordinates = parallel(\n      lat,\n      minLon,\n      maxLon,\n      this.projection_,\n      squaredTolerance\n    );\n    let lineString = this.parallels_[index];\n    if (!lineString) {\n      lineString = new LineString(flatCoordinates, 'XY');\n    } else {\n      lineString.setFlatCoordinates('XY', flatCoordinates);\n      lineString.changed();\n    }\n    return lineString;\n  }\n\n  /**\n   * @param {LineString} lineString Parallels.\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @param {number} index Index.\n   * @return {Point} Parallel point.\n   * @private\n   */\n  getParallelPoint_(lineString, extent, index) {\n    const flatCoordinates = lineString.getFlatCoordinates();\n    let left = 0;\n    let right = flatCoordinates.length - 2;\n    if (flatCoordinates[left] > flatCoordinates[right]) {\n      left = right;\n      right = 0;\n    }\n    const clampedLeft = Math.max(extent[0], flatCoordinates[left]);\n    const clampedRight = Math.min(extent[2], flatCoordinates[right]);\n    const lon = clamp(\n      extent[0] + Math.abs(extent[0] - extent[2]) * this.latLabelPosition_,\n      clampedLeft,\n      clampedRight\n    );\n    const coordinate1 =\n      flatCoordinates[left + 1] +\n      ((flatCoordinates[right + 1] - flatCoordinates[left + 1]) *\n        (lon - flatCoordinates[left])) /\n        (flatCoordinates[right] - flatCoordinates[left]);\n    const coordinate = [lon, coordinate1];\n    const point = this.parallelsLabels_[index].geom;\n    point.setCoordinates(coordinate);\n    return point;\n  }\n\n  /**\n   * Get the list of parallels.  Parallels are lines of equal latitude.\n   * @return {Array<LineString>} The parallels.\n   * @api\n   */\n  getParallels() {\n    return this.parallels_;\n  }\n\n  /**\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   * @private\n   */\n  updateProjectionInfo_(projection) {\n    const epsg4326Projection = getProjection('EPSG:4326');\n\n    const worldExtent = projection.getWorldExtent();\n\n    this.maxLat_ = worldExtent[3];\n    this.maxLon_ = worldExtent[2];\n    this.minLat_ = worldExtent[1];\n    this.minLon_ = worldExtent[0];\n\n    // If the world extent crosses the dateline define a custom transform to\n    // return longitudes which wrap the dateline\n\n    const toLonLatTransform = getTransform(projection, epsg4326Projection);\n    if (this.minLon_ < this.maxLon_) {\n      this.toLonLatTransform_ = toLonLatTransform;\n    } else {\n      const split = this.minLon_ + this.maxLon_ / 2;\n      this.maxLon_ += 360;\n      this.toLonLatTransform_ = function (coordinates, output, dimension) {\n        dimension = dimension || 2;\n        const lonLatCoordinates = toLonLatTransform(\n          coordinates,\n          output,\n          dimension\n        );\n        for (let i = 0, l = lonLatCoordinates.length; i < l; i += dimension) {\n          if (lonLatCoordinates[i] < split) {\n            lonLatCoordinates[i] += 360;\n          }\n        }\n        return lonLatCoordinates;\n      };\n    }\n\n    // Transform the extent to get the limits of the view projection extent\n    // which should be available to the graticule\n\n    this.fromLonLatTransform_ = getTransform(epsg4326Projection, projection);\n    const worldExtentP = applyTransform(\n      [this.minLon_, this.minLat_, this.maxLon_, this.maxLat_],\n      this.fromLonLatTransform_,\n      undefined,\n      8\n    );\n\n    this.minX_ = worldExtentP[0];\n    this.maxX_ = worldExtentP[2];\n    this.minY_ = worldExtentP[1];\n    this.maxY_ = worldExtentP[3];\n\n    // Determine the view projection coordinates of the extremities of the world extent\n    // as these may lie inside a view extent (for example the pole in a polar projection)\n\n    this.bottomLeft_ = this.fromLonLatTransform_([this.minLon_, this.minLat_]);\n    this.bottomRight_ = this.fromLonLatTransform_([this.maxLon_, this.minLat_]);\n    this.topLeft_ = this.fromLonLatTransform_([this.minLon_, this.maxLat_]);\n    this.topRight_ = this.fromLonLatTransform_([this.maxLon_, this.maxLat_]);\n\n    // Transform the projection center to lon lat\n    // Some projections may have a void area at the poles\n    // so replace any NaN latitudes with the min or max value closest to a pole\n\n    this.projectionCenterLonLat_ = this.toLonLatTransform_(\n      getCenter(projection.getExtent())\n    );\n    if (isNaN(this.projectionCenterLonLat_[1])) {\n      this.projectionCenterLonLat_[1] =\n        Math.abs(this.maxLat_) >= Math.abs(this.minLat_)\n          ? this.maxLat_\n          : this.minLat_;\n    }\n\n    this.projection_ = projection;\n  }\n}\n\nexport default Graticule;\n","/**\n * @module ol/layer/Heatmap\n */\nimport BaseVector from './BaseVector.js';\nimport WebGLPointsLayerRenderer from '../renderer/webgl/PointsLayer.js';\nimport {clamp} from '../math.js';\nimport {createCanvasContext2D} from '../dom.js';\n\n/**\n * @typedef {Object} Options\n * @property {string} [className='ol-layer'] A CSS class name to set to the layer element.\n * @property {number} [opacity=1] Opacity (0, 1).\n * @property {boolean} [visible=true] Visibility.\n * @property {import(\"../extent.js\").Extent} [extent] The bounding extent for layer rendering.  The layer will not be\n * rendered outside of this extent.\n * @property {number} [zIndex] The z-index for layer rendering.  At rendering time, the layers\n * will be ordered, first by Z-index and then by position. When `undefined`, a `zIndex` of 0 is assumed\n * for layers that are added to the map's `layers` collection, or `Infinity` when the layer's `setMap()`\n * method was used.\n * @property {number} [minResolution] The minimum resolution (inclusive) at which this layer will be\n * visible.\n * @property {number} [maxResolution] The maximum resolution (exclusive) below which this layer will\n * be visible.\n * @property {number} [minZoom] The minimum view zoom level (exclusive) above which this layer will be\n * visible.\n * @property {number} [maxZoom] The maximum view zoom level (inclusive) at which this layer will\n * be visible.\n * @property {Array<string>} [gradient=['#00f', '#0ff', '#0f0', '#ff0', '#f00']] The color gradient\n * of the heatmap, specified as an array of CSS color strings.\n * @property {number} [radius=8] Radius size in pixels.\n * @property {number} [blur=15] Blur size in pixels.\n * @property {string|function(import(\"../Feature.js\").default):number} [weight='weight'] The feature\n * attribute to use for the weight or a function that returns a weight from a feature. Weight values\n * should range from 0 to 1 (and values outside will be clamped to that range).\n * @property {import(\"../source/Vector.js\").default<import(\"../geom/Point.js\").default>} [source] Point source.\n * @property {Object<string, *>} [properties] Arbitrary observable properties. Can be accessed with `#get()` and `#set()`.\n */\n\n/**\n * @enum {string}\n * @private\n */\nconst Property = {\n  BLUR: 'blur',\n  GRADIENT: 'gradient',\n  RADIUS: 'radius',\n};\n\n/**\n * @const\n * @type {Array<string>}\n */\nconst DEFAULT_GRADIENT = ['#00f', '#0ff', '#0f0', '#ff0', '#f00'];\n\n/**\n * @classdesc\n * Layer for rendering vector data as a heatmap.\n * Note that any property set in the options is set as a {@link module:ol/Object~BaseObject}\n * property on the layer object; for example, setting `title: 'My Title'` in the\n * options means that `title` is observable, and has get/set accessors.\n *\n * @fires import(\"../render/Event.js\").RenderEvent\n * @extends {BaseVector<import(\"../source/Vector.js\").default, WebGLPointsLayerRenderer>}\n * @api\n */\nclass Heatmap extends BaseVector {\n  /**\n   * @param {Options} [options] Options.\n   */\n  constructor(options) {\n    options = options ? options : {};\n\n    const baseOptions = Object.assign({}, options);\n\n    delete baseOptions.gradient;\n    delete baseOptions.radius;\n    delete baseOptions.blur;\n    delete baseOptions.weight;\n    super(baseOptions);\n\n    /**\n     * @private\n     * @type {HTMLCanvasElement}\n     */\n    this.gradient_ = null;\n\n    this.addChangeListener(Property.GRADIENT, this.handleGradientChanged_);\n\n    this.setGradient(options.gradient ? options.gradient : DEFAULT_GRADIENT);\n\n    this.setBlur(options.blur !== undefined ? options.blur : 15);\n\n    this.setRadius(options.radius !== undefined ? options.radius : 8);\n\n    const weight = options.weight ? options.weight : 'weight';\n    if (typeof weight === 'string') {\n      this.weightFunction_ = function (feature) {\n        return feature.get(weight);\n      };\n    } else {\n      this.weightFunction_ = weight;\n    }\n\n    // For performance reasons, don't sort the features before rendering.\n    // The render order is not relevant for a heatmap representation.\n    this.setRenderOrder(null);\n  }\n\n  /**\n   * Return the blur size in pixels.\n   * @return {number} Blur size in pixels.\n   * @api\n   * @observable\n   */\n  getBlur() {\n    return /** @type {number} */ (this.get(Property.BLUR));\n  }\n\n  /**\n   * Return the gradient colors as array of strings.\n   * @return {Array<string>} Colors.\n   * @api\n   * @observable\n   */\n  getGradient() {\n    return /** @type {Array<string>} */ (this.get(Property.GRADIENT));\n  }\n\n  /**\n   * Return the size of the radius in pixels.\n   * @return {number} Radius size in pixel.\n   * @api\n   * @observable\n   */\n  getRadius() {\n    return /** @type {number} */ (this.get(Property.RADIUS));\n  }\n\n  /**\n   * @private\n   */\n  handleGradientChanged_() {\n    this.gradient_ = createGradient(this.getGradient());\n  }\n\n  /**\n   * Set the blur size in pixels.\n   * @param {number} blur Blur size in pixels.\n   * @api\n   * @observable\n   */\n  setBlur(blur) {\n    this.set(Property.BLUR, blur);\n  }\n\n  /**\n   * Set the gradient colors as array of strings.\n   * @param {Array<string>} colors Gradient.\n   * @api\n   * @observable\n   */\n  setGradient(colors) {\n    this.set(Property.GRADIENT, colors);\n  }\n\n  /**\n   * Set the size of the radius in pixels.\n   * @param {number} radius Radius size in pixel.\n   * @api\n   * @observable\n   */\n  setRadius(radius) {\n    this.set(Property.RADIUS, radius);\n  }\n\n  createRenderer() {\n    return new WebGLPointsLayerRenderer(this, {\n      className: this.getClassName(),\n      attributes: [\n        {\n          name: 'weight',\n          callback: (feature) => {\n            const weight = this.weightFunction_(feature);\n            return weight !== undefined ? clamp(weight, 0, 1) : 1;\n          },\n        },\n      ],\n      hitDetectionEnabled: true,\n      vertexShader: `\n        precision mediump float;\n        uniform mat4 u_projectionMatrix;\n        uniform mat4 u_offsetScaleMatrix;\n        uniform float u_size;\n        attribute vec2 a_position;\n        attribute float a_index;\n        attribute float a_weight;\n        attribute vec4 a_hitColor;\n\n        varying vec2 v_texCoord;\n        varying float v_weight;\n        varying vec4 v_hitColor;\n\n        void main(void) {\n          mat4 offsetMatrix = u_offsetScaleMatrix;\n          float offsetX = a_index == 0.0 || a_index == 3.0 ? -u_size / 2.0 : u_size / 2.0;\n          float offsetY = a_index == 0.0 || a_index == 1.0 ? -u_size / 2.0 : u_size / 2.0;\n          vec4 offsets = offsetMatrix * vec4(offsetX, offsetY, 0.0, 0.0);\n          gl_Position = u_projectionMatrix * vec4(a_position, 0.0, 1.0) + offsets;\n          float u = a_index == 0.0 || a_index == 3.0 ? 0.0 : 1.0;\n          float v = a_index == 0.0 || a_index == 1.0 ? 0.0 : 1.0;\n          v_texCoord = vec2(u, v);\n          v_hitColor = a_hitColor;\n          v_weight = a_weight;\n        }`,\n      fragmentShader: `\n        precision mediump float;\n        uniform float u_blurSlope;\n        uniform mediump int u_hitDetection;\n\n        varying vec2 v_texCoord;\n        varying float v_weight;\n        varying vec4 v_hitColor;\n\n        void main(void) {\n          vec2 texCoord = v_texCoord * 2.0 - vec2(1.0, 1.0);\n          float sqRadius = texCoord.x * texCoord.x + texCoord.y * texCoord.y;\n          float value = (1.0 - sqrt(sqRadius)) * u_blurSlope;\n          float alpha = smoothstep(0.0, 1.0, value) * v_weight;\n          gl_FragColor = vec4(alpha, alpha, alpha, alpha);\n          if (u_hitDetection > 0) {\n            if (alpha < 0.05) {\n              discard;\n            }\n            gl_FragColor = v_hitColor;\n          }\n      }`,\n      uniforms: {\n        u_size: () => {\n          return (this.get(Property.RADIUS) + this.get(Property.BLUR)) * 2;\n        },\n        u_blurSlope: () => {\n          return (\n            this.get(Property.RADIUS) / Math.max(1, this.get(Property.BLUR))\n          );\n        },\n      },\n      postProcesses: [\n        {\n          fragmentShader: `\n            precision mediump float;\n\n            uniform sampler2D u_image;\n            uniform sampler2D u_gradientTexture;\n            uniform float u_opacity;\n\n            varying vec2 v_texCoord;\n\n            void main() {\n              vec4 color = texture2D(u_image, v_texCoord);\n              gl_FragColor.a = color.a * u_opacity;\n              gl_FragColor.rgb = texture2D(u_gradientTexture, vec2(0.5, color.a)).rgb;\n              gl_FragColor.rgb *= gl_FragColor.a;\n            }`,\n          uniforms: {\n            u_gradientTexture: () => {\n              return this.gradient_;\n            },\n            u_opacity: () => {\n              return this.getOpacity();\n            },\n          },\n        },\n      ],\n    });\n  }\n\n  renderDeclutter() {}\n}\n\n/**\n * @param {Array<string>} colors A list of colored.\n * @return {HTMLCanvasElement} canvas with gradient texture.\n */\nfunction createGradient(colors) {\n  const width = 1;\n  const height = 256;\n  const context = createCanvasContext2D(width, height);\n\n  const gradient = context.createLinearGradient(0, 0, width, height);\n  const step = 1 / (colors.length - 1);\n  for (let i = 0, ii = colors.length; i < ii; ++i) {\n    gradient.addColorStop(i * step, colors[i]);\n  }\n\n  context.fillStyle = gradient;\n  context.fillRect(0, 0, width, height);\n\n  return context.canvas;\n}\n\nexport default Heatmap;\n","/**\n * @module ol/format/Feature\n */\nimport {abstract} from '../util.js';\nimport {\n  equivalent as equivalentProjection,\n  get as getProjection,\n  transformExtent,\n} from '../proj.js';\n\n/**\n * @typedef {Object} ReadOptions\n * @property {import(\"../proj.js\").ProjectionLike} [dataProjection] Projection of the data we are reading.\n * If not provided, the projection will be derived from the data (where possible) or\n * the `dataProjection` of the format is assigned (where set). If the projection\n * can not be derived from the data and if no `dataProjection` is set for a format,\n * the features will not be reprojected.\n * @property {import(\"../extent.js\").Extent} [extent] Tile extent in map units of the tile being read.\n * This is only required when reading data with tile pixels as geometry units. When configured,\n * a `dataProjection` with `TILE_PIXELS` as `units` and the tile's pixel extent as `extent` needs to be\n * provided.\n * @property {import(\"../proj.js\").ProjectionLike} [featureProjection] Projection of the feature geometries\n * created by the format reader. If not provided, features will be returned in the\n * `dataProjection`.\n */\n\n/**\n * @typedef {Object} WriteOptions\n * @property {import(\"../proj.js\").ProjectionLike} [dataProjection] Projection of the data we are writing.\n * If not provided, the `dataProjection` of the format is assigned (where set).\n * If no `dataProjection` is set for a format, the features will be returned\n * in the `featureProjection`.\n * @property {import(\"../proj.js\").ProjectionLike} [featureProjection] Projection of the feature geometries\n * that will be serialized by the format writer. If not provided, geometries are assumed\n * to be in the `dataProjection` if that is set; in other words, they are not transformed.\n * @property {boolean} [rightHanded] When writing geometries, follow the right-hand\n * rule for linear ring orientation.  This means that polygons will have counter-clockwise\n * exterior rings and clockwise interior rings.  By default, coordinates are serialized\n * as they are provided at construction.  If `true`, the right-hand rule will\n * be applied.  If `false`, the left-hand rule will be applied (clockwise for\n * exterior and counter-clockwise for interior rings).  Note that not all\n * formats support this.  The GeoJSON format does use this property when writing\n * geometries.\n * @property {number} [decimals] Maximum number of decimal places for coordinates.\n * Coordinates are stored internally as floats, but floating-point arithmetic can create\n * coordinates with a large number of decimal places, not generally wanted on output.\n * Set a number here to round coordinates. Can also be used to ensure that\n * coordinates read in can be written back out with the same number of decimals.\n * Default is no rounding.\n */\n\n/**\n * @typedef {'arraybuffer' | 'json' | 'text' | 'xml'} Type\n */\n\n/**\n * @classdesc\n * Abstract base class; normally only used for creating subclasses and not\n * instantiated in apps.\n * Base class for feature formats.\n * {@link module:ol/format/Feature~FeatureFormat} subclasses provide the ability to decode and encode\n * {@link module:ol/Feature~Feature} objects from a variety of commonly used geospatial\n * file formats.  See the documentation for each format for more details.\n *\n * @abstract\n * @api\n */\nclass FeatureFormat {\n  constructor() {\n    /**\n     * @protected\n     * @type {import(\"../proj/Projection.js\").default|undefined}\n     */\n    this.dataProjection = undefined;\n\n    /**\n     * @protected\n     * @type {import(\"../proj/Projection.js\").default|undefined}\n     */\n    this.defaultFeatureProjection = undefined;\n\n    /**\n     * A list media types supported by the format in descending order of preference.\n     * @type {Array<string>}\n     */\n    this.supportedMediaTypes = null;\n  }\n\n  /**\n   * Adds the data projection to the read options.\n   * @param {Document|Element|Object|string} source Source.\n   * @param {ReadOptions} [options] Options.\n   * @return {ReadOptions|undefined} Options.\n   * @protected\n   */\n  getReadOptions(source, options) {\n    if (options) {\n      let dataProjection = options.dataProjection\n        ? getProjection(options.dataProjection)\n        : this.readProjection(source);\n      if (\n        options.extent &&\n        dataProjection &&\n        dataProjection.getUnits() === 'tile-pixels'\n      ) {\n        dataProjection = getProjection(dataProjection);\n        dataProjection.setWorldExtent(options.extent);\n      }\n      options = {\n        dataProjection: dataProjection,\n        featureProjection: options.featureProjection,\n      };\n    }\n    return this.adaptOptions(options);\n  }\n\n  /**\n   * Sets the `dataProjection` on the options, if no `dataProjection`\n   * is set.\n   * @param {WriteOptions|ReadOptions|undefined} options\n   *     Options.\n   * @protected\n   * @return {WriteOptions|ReadOptions|undefined}\n   *     Updated options.\n   */\n  adaptOptions(options) {\n    return Object.assign(\n      {\n        dataProjection: this.dataProjection,\n        featureProjection: this.defaultFeatureProjection,\n      },\n      options\n    );\n  }\n\n  /**\n   * @abstract\n   * @return {Type} The format type.\n   */\n  getType() {\n    return abstract();\n  }\n\n  /**\n   * Read a single feature from a source.\n   *\n   * @abstract\n   * @param {Document|Element|Object|string} source Source.\n   * @param {ReadOptions} [options] Read options.\n   * @return {import(\"../Feature.js\").FeatureLike} Feature.\n   */\n  readFeature(source, options) {\n    return abstract();\n  }\n\n  /**\n   * Read all features from a source.\n   *\n   * @abstract\n   * @param {Document|Element|ArrayBuffer|Object|string} source Source.\n   * @param {ReadOptions} [options] Read options.\n   * @return {Array<import(\"../Feature.js\").FeatureLike>} Features.\n   */\n  readFeatures(source, options) {\n    return abstract();\n  }\n\n  /**\n   * Read a single geometry from a source.\n   *\n   * @abstract\n   * @param {Document|Element|Object|string} source Source.\n   * @param {ReadOptions} [options] Read options.\n   * @return {import(\"../geom/Geometry.js\").default} Geometry.\n   */\n  readGeometry(source, options) {\n    return abstract();\n  }\n\n  /**\n   * Read the projection from a source.\n   *\n   * @abstract\n   * @param {Document|Element|Object|string} source Source.\n   * @return {import(\"../proj/Projection.js\").default|undefined} Projection.\n   */\n  readProjection(source) {\n    return abstract();\n  }\n\n  /**\n   * Encode a feature in this format.\n   *\n   * @abstract\n   * @param {import(\"../Feature.js\").default} feature Feature.\n   * @param {WriteOptions} [options] Write options.\n   * @return {string|ArrayBuffer} Result.\n   */\n  writeFeature(feature, options) {\n    return abstract();\n  }\n\n  /**\n   * Encode an array of features in this format.\n   *\n   * @abstract\n   * @param {Array<import(\"../Feature.js\").default>} features Features.\n   * @param {WriteOptions} [options] Write options.\n   * @return {string|ArrayBuffer} Result.\n   */\n  writeFeatures(features, options) {\n    return abstract();\n  }\n\n  /**\n   * Write a single geometry in this format.\n   *\n   * @abstract\n   * @param {import(\"../geom/Geometry.js\").default} geometry Geometry.\n   * @param {WriteOptions} [options] Write options.\n   * @return {string|ArrayBuffer} Result.\n   */\n  writeGeometry(geometry, options) {\n    return abstract();\n  }\n}\n\nexport default FeatureFormat;\n\n/**\n * @param {import(\"../geom/Geometry.js\").default} geometry Geometry.\n * @param {boolean} write Set to true for writing, false for reading.\n * @param {WriteOptions|ReadOptions} [options] Options.\n * @return {import(\"../geom/Geometry.js\").default} Transformed geometry.\n */\nexport function transformGeometryWithOptions(geometry, write, options) {\n  const featureProjection = options\n    ? getProjection(options.featureProjection)\n    : null;\n  const dataProjection = options ? getProjection(options.dataProjection) : null;\n\n  let transformed;\n  if (\n    featureProjection &&\n    dataProjection &&\n    !equivalentProjection(featureProjection, dataProjection)\n  ) {\n    transformed = (write ? geometry.clone() : geometry).transform(\n      write ? featureProjection : dataProjection,\n      write ? dataProjection : featureProjection\n    );\n  } else {\n    transformed = geometry;\n  }\n  if (\n    write &&\n    options &&\n    /** @type {WriteOptions} */ (options).decimals !== undefined\n  ) {\n    const power = Math.pow(10, /** @type {WriteOptions} */ (options).decimals);\n    // if decimals option on write, round each coordinate appropriately\n    /**\n     * @param {Array<number>} coordinates Coordinates.\n     * @return {Array<number>} Transformed coordinates.\n     */\n    const transform = function (coordinates) {\n      for (let i = 0, ii = coordinates.length; i < ii; ++i) {\n        coordinates[i] = Math.round(coordinates[i] * power) / power;\n      }\n      return coordinates;\n    };\n    if (transformed === geometry) {\n      transformed = geometry.clone();\n    }\n    transformed.applyTransform(transform);\n  }\n  return transformed;\n}\n\n/**\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @param {ReadOptions} [options] Read options.\n * @return {import(\"../extent.js\").Extent} Transformed extent.\n */\nexport function transformExtentWithOptions(extent, options) {\n  const featureProjection = options\n    ? getProjection(options.featureProjection)\n    : null;\n  const dataProjection = options ? getProjection(options.dataProjection) : null;\n\n  if (\n    featureProjection &&\n    dataProjection &&\n    !equivalentProjection(featureProjection, dataProjection)\n  ) {\n    return transformExtent(extent, dataProjection, featureProjection);\n  }\n  return extent;\n}\n","/*! ieee754. BSD-3-Clause License. Feross Aboukhadijeh <https://feross.org/opensource> */\nexports.read = function (buffer, offset, isLE, mLen, nBytes) {\n  var e, m\n  var eLen = (nBytes * 8) - mLen - 1\n  var eMax = (1 << eLen) - 1\n  var eBias = eMax >> 1\n  var nBits = -7\n  var i = isLE ? (nBytes - 1) : 0\n  var d = isLE ? -1 : 1\n  var s = buffer[offset + i]\n\n  i += d\n\n  e = s & ((1 << (-nBits)) - 1)\n  s >>= (-nBits)\n  nBits += eLen\n  for (; nBits > 0; e = (e * 256) + buffer[offset + i], i += d, nBits -= 8) {}\n\n  m = e & ((1 << (-nBits)) - 1)\n  e >>= (-nBits)\n  nBits += mLen\n  for (; nBits > 0; m = (m * 256) + buffer[offset + i], i += d, nBits -= 8) {}\n\n  if (e === 0) {\n    e = 1 - eBias\n  } else if (e === eMax) {\n    return m ? NaN : ((s ? -1 : 1) * Infinity)\n  } else {\n    m = m + Math.pow(2, mLen)\n    e = e - eBias\n  }\n  return (s ? -1 : 1) * m * Math.pow(2, e - mLen)\n}\n\nexports.write = function (buffer, value, offset, isLE, mLen, nBytes) {\n  var e, m, c\n  var eLen = (nBytes * 8) - mLen - 1\n  var eMax = (1 << eLen) - 1\n  var eBias = eMax >> 1\n  var rt = (mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0)\n  var i = isLE ? 0 : (nBytes - 1)\n  var d = isLE ? 1 : -1\n  var s = value < 0 || (value === 0 && 1 / value < 0) ? 1 : 0\n\n  value = Math.abs(value)\n\n  if (isNaN(value) || value === Infinity) {\n    m = isNaN(value) ? 1 : 0\n    e = eMax\n  } else {\n    e = Math.floor(Math.log(value) / Math.LN2)\n    if (value * (c = Math.pow(2, -e)) < 1) {\n      e--\n      c *= 2\n    }\n    if (e + eBias >= 1) {\n      value += rt / c\n    } else {\n      value += rt * Math.pow(2, 1 - eBias)\n    }\n    if (value * c >= 2) {\n      e++\n      c /= 2\n    }\n\n    if (e + eBias >= eMax) {\n      m = 0\n      e = eMax\n    } else if (e + eBias >= 1) {\n      m = ((value * c) - 1) * Math.pow(2, mLen)\n      e = e + eBias\n    } else {\n      m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen)\n      e = 0\n    }\n  }\n\n  for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}\n\n  e = (e << mLen) | m\n  eLen += mLen\n  for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}\n\n  buffer[offset + i - d] |= s * 128\n}\n","'use strict';\n\nmodule.exports = Pbf;\n\nvar ieee754 = require('ieee754');\n\nfunction Pbf(buf) {\n    this.buf = ArrayBuffer.isView && ArrayBuffer.isView(buf) ? buf : new Uint8Array(buf || 0);\n    this.pos = 0;\n    this.type = 0;\n    this.length = this.buf.length;\n}\n\nPbf.Varint  = 0; // varint: int32, int64, uint32, uint64, sint32, sint64, bool, enum\nPbf.Fixed64 = 1; // 64-bit: double, fixed64, sfixed64\nPbf.Bytes   = 2; // length-delimited: string, bytes, embedded messages, packed repeated fields\nPbf.Fixed32 = 5; // 32-bit: float, fixed32, sfixed32\n\nvar SHIFT_LEFT_32 = (1 << 16) * (1 << 16),\n    SHIFT_RIGHT_32 = 1 / SHIFT_LEFT_32;\n\n// Threshold chosen based on both benchmarking and knowledge about browser string\n// data structures (which currently switch structure types at 12 bytes or more)\nvar TEXT_DECODER_MIN_LENGTH = 12;\nvar utf8TextDecoder = typeof TextDecoder === 'undefined' ? null : new TextDecoder('utf8');\n\nPbf.prototype = {\n\n    destroy: function() {\n        this.buf = null;\n    },\n\n    // === READING =================================================================\n\n    readFields: function(readField, result, end) {\n        end = end || this.length;\n\n        while (this.pos < end) {\n            var val = this.readVarint(),\n                tag = val >> 3,\n                startPos = this.pos;\n\n            this.type = val & 0x7;\n            readField(tag, result, this);\n\n            if (this.pos === startPos) this.skip(val);\n        }\n        return result;\n    },\n\n    readMessage: function(readField, result) {\n        return this.readFields(readField, result, this.readVarint() + this.pos);\n    },\n\n    readFixed32: function() {\n        var val = readUInt32(this.buf, this.pos);\n        this.pos += 4;\n        return val;\n    },\n\n    readSFixed32: function() {\n        var val = readInt32(this.buf, this.pos);\n        this.pos += 4;\n        return val;\n    },\n\n    // 64-bit int handling is based on github.com/dpw/node-buffer-more-ints (MIT-licensed)\n\n    readFixed64: function() {\n        var val = readUInt32(this.buf, this.pos) + readUInt32(this.buf, this.pos + 4) * SHIFT_LEFT_32;\n        this.pos += 8;\n        return val;\n    },\n\n    readSFixed64: function() {\n        var val = readUInt32(this.buf, this.pos) + readInt32(this.buf, this.pos + 4) * SHIFT_LEFT_32;\n        this.pos += 8;\n        return val;\n    },\n\n    readFloat: function() {\n        var val = ieee754.read(this.buf, this.pos, true, 23, 4);\n        this.pos += 4;\n        return val;\n    },\n\n    readDouble: function() {\n        var val = ieee754.read(this.buf, this.pos, true, 52, 8);\n        this.pos += 8;\n        return val;\n    },\n\n    readVarint: function(isSigned) {\n        var buf = this.buf,\n            val, b;\n\n        b = buf[this.pos++]; val  =  b & 0x7f;        if (b < 0x80) return val;\n        b = buf[this.pos++]; val |= (b & 0x7f) << 7;  if (b < 0x80) return val;\n        b = buf[this.pos++]; val |= (b & 0x7f) << 14; if (b < 0x80) return val;\n        b = buf[this.pos++]; val |= (b & 0x7f) << 21; if (b < 0x80) return val;\n        b = buf[this.pos];   val |= (b & 0x0f) << 28;\n\n        return readVarintRemainder(val, isSigned, this);\n    },\n\n    readVarint64: function() { // for compatibility with v2.0.1\n        return this.readVarint(true);\n    },\n\n    readSVarint: function() {\n        var num = this.readVarint();\n        return num % 2 === 1 ? (num + 1) / -2 : num / 2; // zigzag encoding\n    },\n\n    readBoolean: function() {\n        return Boolean(this.readVarint());\n    },\n\n    readString: function() {\n        var end = this.readVarint() + this.pos;\n        var pos = this.pos;\n        this.pos = end;\n\n        if (end - pos >= TEXT_DECODER_MIN_LENGTH && utf8TextDecoder) {\n            // longer strings are fast with the built-in browser TextDecoder API\n            return readUtf8TextDecoder(this.buf, pos, end);\n        }\n        // short strings are fast with our custom implementation\n        return readUtf8(this.buf, pos, end);\n    },\n\n    readBytes: function() {\n        var end = this.readVarint() + this.pos,\n            buffer = this.buf.subarray(this.pos, end);\n        this.pos = end;\n        return buffer;\n    },\n\n    // verbose for performance reasons; doesn't affect gzipped size\n\n    readPackedVarint: function(arr, isSigned) {\n        if (this.type !== Pbf.Bytes) return arr.push(this.readVarint(isSigned));\n        var end = readPackedEnd(this);\n        arr = arr || [];\n        while (this.pos < end) arr.push(this.readVarint(isSigned));\n        return arr;\n    },\n    readPackedSVarint: function(arr) {\n        if (this.type !== Pbf.Bytes) return arr.push(this.readSVarint());\n        var end = readPackedEnd(this);\n        arr = arr || [];\n        while (this.pos < end) arr.push(this.readSVarint());\n        return arr;\n    },\n    readPackedBoolean: function(arr) {\n        if (this.type !== Pbf.Bytes) return arr.push(this.readBoolean());\n        var end = readPackedEnd(this);\n        arr = arr || [];\n        while (this.pos < end) arr.push(this.readBoolean());\n        return arr;\n    },\n    readPackedFloat: function(arr) {\n        if (this.type !== Pbf.Bytes) return arr.push(this.readFloat());\n        var end = readPackedEnd(this);\n        arr = arr || [];\n        while (this.pos < end) arr.push(this.readFloat());\n        return arr;\n    },\n    readPackedDouble: function(arr) {\n        if (this.type !== Pbf.Bytes) return arr.push(this.readDouble());\n        var end = readPackedEnd(this);\n        arr = arr || [];\n        while (this.pos < end) arr.push(this.readDouble());\n        return arr;\n    },\n    readPackedFixed32: function(arr) {\n        if (this.type !== Pbf.Bytes) return arr.push(this.readFixed32());\n        var end = readPackedEnd(this);\n        arr = arr || [];\n        while (this.pos < end) arr.push(this.readFixed32());\n        return arr;\n    },\n    readPackedSFixed32: function(arr) {\n        if (this.type !== Pbf.Bytes) return arr.push(this.readSFixed32());\n        var end = readPackedEnd(this);\n        arr = arr || [];\n        while (this.pos < end) arr.push(this.readSFixed32());\n        return arr;\n    },\n    readPackedFixed64: function(arr) {\n        if (this.type !== Pbf.Bytes) return arr.push(this.readFixed64());\n        var end = readPackedEnd(this);\n        arr = arr || [];\n        while (this.pos < end) arr.push(this.readFixed64());\n        return arr;\n    },\n    readPackedSFixed64: function(arr) {\n        if (this.type !== Pbf.Bytes) return arr.push(this.readSFixed64());\n        var end = readPackedEnd(this);\n        arr = arr || [];\n        while (this.pos < end) arr.push(this.readSFixed64());\n        return arr;\n    },\n\n    skip: function(val) {\n        var type = val & 0x7;\n        if (type === Pbf.Varint) while (this.buf[this.pos++] > 0x7f) {}\n        else if (type === Pbf.Bytes) this.pos = this.readVarint() + this.pos;\n        else if (type === Pbf.Fixed32) this.pos += 4;\n        else if (type === Pbf.Fixed64) this.pos += 8;\n        else throw new Error('Unimplemented type: ' + type);\n    },\n\n    // === WRITING =================================================================\n\n    writeTag: function(tag, type) {\n        this.writeVarint((tag << 3) | type);\n    },\n\n    realloc: function(min) {\n        var length = this.length || 16;\n\n        while (length < this.pos + min) length *= 2;\n\n        if (length !== this.length) {\n            var buf = new Uint8Array(length);\n            buf.set(this.buf);\n            this.buf = buf;\n            this.length = length;\n        }\n    },\n\n    finish: function() {\n        this.length = this.pos;\n        this.pos = 0;\n        return this.buf.subarray(0, this.length);\n    },\n\n    writeFixed32: function(val) {\n        this.realloc(4);\n        writeInt32(this.buf, val, this.pos);\n        this.pos += 4;\n    },\n\n    writeSFixed32: function(val) {\n        this.realloc(4);\n        writeInt32(this.buf, val, this.pos);\n        this.pos += 4;\n    },\n\n    writeFixed64: function(val) {\n        this.realloc(8);\n        writeInt32(this.buf, val & -1, this.pos);\n        writeInt32(this.buf, Math.floor(val * SHIFT_RIGHT_32), this.pos + 4);\n        this.pos += 8;\n    },\n\n    writeSFixed64: function(val) {\n        this.realloc(8);\n        writeInt32(this.buf, val & -1, this.pos);\n        writeInt32(this.buf, Math.floor(val * SHIFT_RIGHT_32), this.pos + 4);\n        this.pos += 8;\n    },\n\n    writeVarint: function(val) {\n        val = +val || 0;\n\n        if (val > 0xfffffff || val < 0) {\n            writeBigVarint(val, this);\n            return;\n        }\n\n        this.realloc(4);\n\n        this.buf[this.pos++] =           val & 0x7f  | (val > 0x7f ? 0x80 : 0); if (val <= 0x7f) return;\n        this.buf[this.pos++] = ((val >>>= 7) & 0x7f) | (val > 0x7f ? 0x80 : 0); if (val <= 0x7f) return;\n        this.buf[this.pos++] = ((val >>>= 7) & 0x7f) | (val > 0x7f ? 0x80 : 0); if (val <= 0x7f) return;\n        this.buf[this.pos++] =   (val >>> 7) & 0x7f;\n    },\n\n    writeSVarint: function(val) {\n        this.writeVarint(val < 0 ? -val * 2 - 1 : val * 2);\n    },\n\n    writeBoolean: function(val) {\n        this.writeVarint(Boolean(val));\n    },\n\n    writeString: function(str) {\n        str = String(str);\n        this.realloc(str.length * 4);\n\n        this.pos++; // reserve 1 byte for short string length\n\n        var startPos = this.pos;\n        // write the string directly to the buffer and see how much was written\n        this.pos = writeUtf8(this.buf, str, this.pos);\n        var len = this.pos - startPos;\n\n        if (len >= 0x80) makeRoomForExtraLength(startPos, len, this);\n\n        // finally, write the message length in the reserved place and restore the position\n        this.pos = startPos - 1;\n        this.writeVarint(len);\n        this.pos += len;\n    },\n\n    writeFloat: function(val) {\n        this.realloc(4);\n        ieee754.write(this.buf, val, this.pos, true, 23, 4);\n        this.pos += 4;\n    },\n\n    writeDouble: function(val) {\n        this.realloc(8);\n        ieee754.write(this.buf, val, this.pos, true, 52, 8);\n        this.pos += 8;\n    },\n\n    writeBytes: function(buffer) {\n        var len = buffer.length;\n        this.writeVarint(len);\n        this.realloc(len);\n        for (var i = 0; i < len; i++) this.buf[this.pos++] = buffer[i];\n    },\n\n    writeRawMessage: function(fn, obj) {\n        this.pos++; // reserve 1 byte for short message length\n\n        // write the message directly to the buffer and see how much was written\n        var startPos = this.pos;\n        fn(obj, this);\n        var len = this.pos - startPos;\n\n        if (len >= 0x80) makeRoomForExtraLength(startPos, len, this);\n\n        // finally, write the message length in the reserved place and restore the position\n        this.pos = startPos - 1;\n        this.writeVarint(len);\n        this.pos += len;\n    },\n\n    writeMessage: function(tag, fn, obj) {\n        this.writeTag(tag, Pbf.Bytes);\n        this.writeRawMessage(fn, obj);\n    },\n\n    writePackedVarint:   function(tag, arr) { if (arr.length) this.writeMessage(tag, writePackedVarint, arr);   },\n    writePackedSVarint:  function(tag, arr) { if (arr.length) this.writeMessage(tag, writePackedSVarint, arr);  },\n    writePackedBoolean:  function(tag, arr) { if (arr.length) this.writeMessage(tag, writePackedBoolean, arr);  },\n    writePackedFloat:    function(tag, arr) { if (arr.length) this.writeMessage(tag, writePackedFloat, arr);    },\n    writePackedDouble:   function(tag, arr) { if (arr.length) this.writeMessage(tag, writePackedDouble, arr);   },\n    writePackedFixed32:  function(tag, arr) { if (arr.length) this.writeMessage(tag, writePackedFixed32, arr);  },\n    writePackedSFixed32: function(tag, arr) { if (arr.length) this.writeMessage(tag, writePackedSFixed32, arr); },\n    writePackedFixed64:  function(tag, arr) { if (arr.length) this.writeMessage(tag, writePackedFixed64, arr);  },\n    writePackedSFixed64: function(tag, arr) { if (arr.length) this.writeMessage(tag, writePackedSFixed64, arr); },\n\n    writeBytesField: function(tag, buffer) {\n        this.writeTag(tag, Pbf.Bytes);\n        this.writeBytes(buffer);\n    },\n    writeFixed32Field: function(tag, val) {\n        this.writeTag(tag, Pbf.Fixed32);\n        this.writeFixed32(val);\n    },\n    writeSFixed32Field: function(tag, val) {\n        this.writeTag(tag, Pbf.Fixed32);\n        this.writeSFixed32(val);\n    },\n    writeFixed64Field: function(tag, val) {\n        this.writeTag(tag, Pbf.Fixed64);\n        this.writeFixed64(val);\n    },\n    writeSFixed64Field: function(tag, val) {\n        this.writeTag(tag, Pbf.Fixed64);\n        this.writeSFixed64(val);\n    },\n    writeVarintField: function(tag, val) {\n        this.writeTag(tag, Pbf.Varint);\n        this.writeVarint(val);\n    },\n    writeSVarintField: function(tag, val) {\n        this.writeTag(tag, Pbf.Varint);\n        this.writeSVarint(val);\n    },\n    writeStringField: function(tag, str) {\n        this.writeTag(tag, Pbf.Bytes);\n        this.writeString(str);\n    },\n    writeFloatField: function(tag, val) {\n        this.writeTag(tag, Pbf.Fixed32);\n        this.writeFloat(val);\n    },\n    writeDoubleField: function(tag, val) {\n        this.writeTag(tag, Pbf.Fixed64);\n        this.writeDouble(val);\n    },\n    writeBooleanField: function(tag, val) {\n        this.writeVarintField(tag, Boolean(val));\n    }\n};\n\nfunction readVarintRemainder(l, s, p) {\n    var buf = p.buf,\n        h, b;\n\n    b = buf[p.pos++]; h  = (b & 0x70) >> 4;  if (b < 0x80) return toNum(l, h, s);\n    b = buf[p.pos++]; h |= (b & 0x7f) << 3;  if (b < 0x80) return toNum(l, h, s);\n    b = buf[p.pos++]; h |= (b & 0x7f) << 10; if (b < 0x80) return toNum(l, h, s);\n    b = buf[p.pos++]; h |= (b & 0x7f) << 17; if (b < 0x80) return toNum(l, h, s);\n    b = buf[p.pos++]; h |= (b & 0x7f) << 24; if (b < 0x80) return toNum(l, h, s);\n    b = buf[p.pos++]; h |= (b & 0x01) << 31; if (b < 0x80) return toNum(l, h, s);\n\n    throw new Error('Expected varint not more than 10 bytes');\n}\n\nfunction readPackedEnd(pbf) {\n    return pbf.type === Pbf.Bytes ?\n        pbf.readVarint() + pbf.pos : pbf.pos + 1;\n}\n\nfunction toNum(low, high, isSigned) {\n    if (isSigned) {\n        return high * 0x100000000 + (low >>> 0);\n    }\n\n    return ((high >>> 0) * 0x100000000) + (low >>> 0);\n}\n\nfunction writeBigVarint(val, pbf) {\n    var low, high;\n\n    if (val >= 0) {\n        low  = (val % 0x100000000) | 0;\n        high = (val / 0x100000000) | 0;\n    } else {\n        low  = ~(-val % 0x100000000);\n        high = ~(-val / 0x100000000);\n\n        if (low ^ 0xffffffff) {\n            low = (low + 1) | 0;\n        } else {\n            low = 0;\n            high = (high + 1) | 0;\n        }\n    }\n\n    if (val >= 0x10000000000000000 || val < -0x10000000000000000) {\n        throw new Error('Given varint doesn\\'t fit into 10 bytes');\n    }\n\n    pbf.realloc(10);\n\n    writeBigVarintLow(low, high, pbf);\n    writeBigVarintHigh(high, pbf);\n}\n\nfunction writeBigVarintLow(low, high, pbf) {\n    pbf.buf[pbf.pos++] = low & 0x7f | 0x80; low >>>= 7;\n    pbf.buf[pbf.pos++] = low & 0x7f | 0x80; low >>>= 7;\n    pbf.buf[pbf.pos++] = low & 0x7f | 0x80; low >>>= 7;\n    pbf.buf[pbf.pos++] = low & 0x7f | 0x80; low >>>= 7;\n    pbf.buf[pbf.pos]   = low & 0x7f;\n}\n\nfunction writeBigVarintHigh(high, pbf) {\n    var lsb = (high & 0x07) << 4;\n\n    pbf.buf[pbf.pos++] |= lsb         | ((high >>>= 3) ? 0x80 : 0); if (!high) return;\n    pbf.buf[pbf.pos++]  = high & 0x7f | ((high >>>= 7) ? 0x80 : 0); if (!high) return;\n    pbf.buf[pbf.pos++]  = high & 0x7f | ((high >>>= 7) ? 0x80 : 0); if (!high) return;\n    pbf.buf[pbf.pos++]  = high & 0x7f | ((high >>>= 7) ? 0x80 : 0); if (!high) return;\n    pbf.buf[pbf.pos++]  = high & 0x7f | ((high >>>= 7) ? 0x80 : 0); if (!high) return;\n    pbf.buf[pbf.pos++]  = high & 0x7f;\n}\n\nfunction makeRoomForExtraLength(startPos, len, pbf) {\n    var extraLen =\n        len <= 0x3fff ? 1 :\n        len <= 0x1fffff ? 2 :\n        len <= 0xfffffff ? 3 : Math.floor(Math.log(len) / (Math.LN2 * 7));\n\n    // if 1 byte isn't enough for encoding message length, shift the data to the right\n    pbf.realloc(extraLen);\n    for (var i = pbf.pos - 1; i >= startPos; i--) pbf.buf[i + extraLen] = pbf.buf[i];\n}\n\nfunction writePackedVarint(arr, pbf)   { for (var i = 0; i < arr.length; i++) pbf.writeVarint(arr[i]);   }\nfunction writePackedSVarint(arr, pbf)  { for (var i = 0; i < arr.length; i++) pbf.writeSVarint(arr[i]);  }\nfunction writePackedFloat(arr, pbf)    { for (var i = 0; i < arr.length; i++) pbf.writeFloat(arr[i]);    }\nfunction writePackedDouble(arr, pbf)   { for (var i = 0; i < arr.length; i++) pbf.writeDouble(arr[i]);   }\nfunction writePackedBoolean(arr, pbf)  { for (var i = 0; i < arr.length; i++) pbf.writeBoolean(arr[i]);  }\nfunction writePackedFixed32(arr, pbf)  { for (var i = 0; i < arr.length; i++) pbf.writeFixed32(arr[i]);  }\nfunction writePackedSFixed32(arr, pbf) { for (var i = 0; i < arr.length; i++) pbf.writeSFixed32(arr[i]); }\nfunction writePackedFixed64(arr, pbf)  { for (var i = 0; i < arr.length; i++) pbf.writeFixed64(arr[i]);  }\nfunction writePackedSFixed64(arr, pbf) { for (var i = 0; i < arr.length; i++) pbf.writeSFixed64(arr[i]); }\n\n// Buffer code below from https://github.com/feross/buffer, MIT-licensed\n\nfunction readUInt32(buf, pos) {\n    return ((buf[pos]) |\n        (buf[pos + 1] << 8) |\n        (buf[pos + 2] << 16)) +\n        (buf[pos + 3] * 0x1000000);\n}\n\nfunction writeInt32(buf, val, pos) {\n    buf[pos] = val;\n    buf[pos + 1] = (val >>> 8);\n    buf[pos + 2] = (val >>> 16);\n    buf[pos + 3] = (val >>> 24);\n}\n\nfunction readInt32(buf, pos) {\n    return ((buf[pos]) |\n        (buf[pos + 1] << 8) |\n        (buf[pos + 2] << 16)) +\n        (buf[pos + 3] << 24);\n}\n\nfunction readUtf8(buf, pos, end) {\n    var str = '';\n    var i = pos;\n\n    while (i < end) {\n        var b0 = buf[i];\n        var c = null; // codepoint\n        var bytesPerSequence =\n            b0 > 0xEF ? 4 :\n            b0 > 0xDF ? 3 :\n            b0 > 0xBF ? 2 : 1;\n\n        if (i + bytesPerSequence > end) break;\n\n        var b1, b2, b3;\n\n        if (bytesPerSequence === 1) {\n            if (b0 < 0x80) {\n                c = b0;\n            }\n        } else if (bytesPerSequence === 2) {\n            b1 = buf[i + 1];\n            if ((b1 & 0xC0) === 0x80) {\n                c = (b0 & 0x1F) << 0x6 | (b1 & 0x3F);\n                if (c <= 0x7F) {\n                    c = null;\n                }\n            }\n        } else if (bytesPerSequence === 3) {\n            b1 = buf[i + 1];\n            b2 = buf[i + 2];\n            if ((b1 & 0xC0) === 0x80 && (b2 & 0xC0) === 0x80) {\n                c = (b0 & 0xF) << 0xC | (b1 & 0x3F) << 0x6 | (b2 & 0x3F);\n                if (c <= 0x7FF || (c >= 0xD800 && c <= 0xDFFF)) {\n                    c = null;\n                }\n            }\n        } else if (bytesPerSequence === 4) {\n            b1 = buf[i + 1];\n            b2 = buf[i + 2];\n            b3 = buf[i + 3];\n            if ((b1 & 0xC0) === 0x80 && (b2 & 0xC0) === 0x80 && (b3 & 0xC0) === 0x80) {\n                c = (b0 & 0xF) << 0x12 | (b1 & 0x3F) << 0xC | (b2 & 0x3F) << 0x6 | (b3 & 0x3F);\n                if (c <= 0xFFFF || c >= 0x110000) {\n                    c = null;\n                }\n            }\n        }\n\n        if (c === null) {\n            c = 0xFFFD;\n            bytesPerSequence = 1;\n\n        } else if (c > 0xFFFF) {\n            c -= 0x10000;\n            str += String.fromCharCode(c >>> 10 & 0x3FF | 0xD800);\n            c = 0xDC00 | c & 0x3FF;\n        }\n\n        str += String.fromCharCode(c);\n        i += bytesPerSequence;\n    }\n\n    return str;\n}\n\nfunction readUtf8TextDecoder(buf, pos, end) {\n    return utf8TextDecoder.decode(buf.subarray(pos, end));\n}\n\nfunction writeUtf8(buf, str, pos) {\n    for (var i = 0, c, lead; i < str.length; i++) {\n        c = str.charCodeAt(i); // code point\n\n        if (c > 0xD7FF && c < 0xE000) {\n            if (lead) {\n                if (c < 0xDC00) {\n                    buf[pos++] = 0xEF;\n                    buf[pos++] = 0xBF;\n                    buf[pos++] = 0xBD;\n                    lead = c;\n                    continue;\n                } else {\n                    c = lead - 0xD800 << 10 | c - 0xDC00 | 0x10000;\n                    lead = null;\n                }\n            } else {\n                if (c > 0xDBFF || (i + 1 === str.length)) {\n                    buf[pos++] = 0xEF;\n                    buf[pos++] = 0xBF;\n                    buf[pos++] = 0xBD;\n                } else {\n                    lead = c;\n                }\n                continue;\n            }\n        } else if (lead) {\n            buf[pos++] = 0xEF;\n            buf[pos++] = 0xBF;\n            buf[pos++] = 0xBD;\n            lead = null;\n        }\n\n        if (c < 0x80) {\n            buf[pos++] = c;\n        } else {\n            if (c < 0x800) {\n                buf[pos++] = c >> 0x6 | 0xC0;\n            } else {\n                if (c < 0x10000) {\n                    buf[pos++] = c >> 0xC | 0xE0;\n                } else {\n                    buf[pos++] = c >> 0x12 | 0xF0;\n                    buf[pos++] = c >> 0xC & 0x3F | 0x80;\n                }\n                buf[pos++] = c >> 0x6 & 0x3F | 0x80;\n            }\n            buf[pos++] = c & 0x3F | 0x80;\n        }\n    }\n    return pos;\n}\n","/**\n * @module ol/format/MVT\n */\n//FIXME Implement projection handling\n\nimport FeatureFormat, {transformGeometryWithOptions} from './Feature.js';\nimport LineString from '../geom/LineString.js';\nimport MultiLineString from '../geom/MultiLineString.js';\nimport MultiPoint from '../geom/MultiPoint.js';\nimport MultiPolygon from '../geom/MultiPolygon.js';\nimport PBF from 'pbf';\nimport Point from '../geom/Point.js';\nimport Polygon from '../geom/Polygon.js';\nimport Projection from '../proj/Projection.js';\nimport RenderFeature from '../render/Feature.js';\nimport {assert} from '../asserts.js';\nimport {get} from '../proj.js';\nimport {inflateEnds} from '../geom/flat/orient.js';\n\n/**\n * @typedef {Object} Options\n * @property {import(\"../Feature.js\").FeatureClass} [featureClass] Class for features returned by\n * {@link module:ol/format/MVT~MVT#readFeatures}. Set to {@link module:ol/Feature~Feature} to get full editing and geometry\n * support at the cost of decreased rendering performance. The default is\n * {@link module:ol/render/Feature~RenderFeature}, which is optimized for rendering and hit detection.\n * @property {string} [geometryName='geometry'] Geometry name to use when creating features.\n * @property {string} [layerName='layer'] Name of the feature attribute that holds the layer name.\n * @property {Array<string>} [layers] Layers to read features from. If not provided, features will be read from all\n * @property {string} [idProperty] Optional property that will be assigned as the feature id and removed from the properties.\n * layers.\n */\n\n/**\n * @classdesc\n * Feature format for reading data in the Mapbox MVT format.\n *\n * @param {Options} [options] Options.\n * @api\n */\nclass MVT extends FeatureFormat {\n  /**\n   * @param {Options} [options] Options.\n   */\n  constructor(options) {\n    super();\n\n    options = options ? options : {};\n\n    /**\n     * @type {Projection}\n     */\n    this.dataProjection = new Projection({\n      code: '',\n      units: 'tile-pixels',\n    });\n\n    /**\n     * @private\n     * @type {import(\"../Feature.js\").FeatureClass}\n     */\n    this.featureClass_ = options.featureClass\n      ? options.featureClass\n      : RenderFeature;\n\n    /**\n     * @private\n     * @type {string|undefined}\n     */\n    this.geometryName_ = options.geometryName;\n\n    /**\n     * @private\n     * @type {string}\n     */\n    this.layerName_ = options.layerName ? options.layerName : 'layer';\n\n    /**\n     * @private\n     * @type {Array<string>|null}\n     */\n    this.layers_ = options.layers ? options.layers : null;\n\n    /**\n     * @private\n     * @type {string}\n     */\n    this.idProperty_ = options.idProperty;\n\n    this.supportedMediaTypes = [\n      'application/vnd.mapbox-vector-tile',\n      'application/x-protobuf',\n    ];\n  }\n\n  /**\n   * Read the raw geometry from the pbf offset stored in a raw feature's geometry\n   * property.\n   * @param {PBF} pbf PBF.\n   * @param {Object} feature Raw feature.\n   * @param {Array<number>} flatCoordinates Array to store flat coordinates in.\n   * @param {Array<number>} ends Array to store ends in.\n   * @private\n   */\n  readRawGeometry_(pbf, feature, flatCoordinates, ends) {\n    pbf.pos = feature.geometry;\n\n    const end = pbf.readVarint() + pbf.pos;\n    let cmd = 1;\n    let length = 0;\n    let x = 0;\n    let y = 0;\n    let coordsLen = 0;\n    let currentEnd = 0;\n\n    while (pbf.pos < end) {\n      if (!length) {\n        const cmdLen = pbf.readVarint();\n        cmd = cmdLen & 0x7;\n        length = cmdLen >> 3;\n      }\n\n      length--;\n\n      if (cmd === 1 || cmd === 2) {\n        x += pbf.readSVarint();\n        y += pbf.readSVarint();\n\n        if (cmd === 1) {\n          // moveTo\n          if (coordsLen > currentEnd) {\n            ends.push(coordsLen);\n            currentEnd = coordsLen;\n          }\n        }\n\n        flatCoordinates.push(x, y);\n        coordsLen += 2;\n      } else if (cmd === 7) {\n        if (coordsLen > currentEnd) {\n          // close polygon\n          flatCoordinates.push(\n            flatCoordinates[currentEnd],\n            flatCoordinates[currentEnd + 1]\n          );\n          coordsLen += 2;\n        }\n      } else {\n        assert(false, 59); // Invalid command found in the PBF\n      }\n    }\n\n    if (coordsLen > currentEnd) {\n      ends.push(coordsLen);\n      currentEnd = coordsLen;\n    }\n  }\n\n  /**\n   * @private\n   * @param {PBF} pbf PBF\n   * @param {Object} rawFeature Raw Mapbox feature.\n   * @param {import(\"./Feature.js\").ReadOptions} options Read options.\n   * @return {import(\"../Feature.js\").FeatureLike|null} Feature.\n   */\n  createFeature_(pbf, rawFeature, options) {\n    const type = rawFeature.type;\n    if (type === 0) {\n      return null;\n    }\n\n    let feature;\n    const values = rawFeature.properties;\n\n    let id;\n    if (!this.idProperty_) {\n      id = rawFeature.id;\n    } else {\n      id = values[this.idProperty_];\n      delete values[this.idProperty_];\n    }\n\n    values[this.layerName_] = rawFeature.layer.name;\n\n    const flatCoordinates = /** @type {Array<number>} */ ([]);\n    const ends = /** @type {Array<number>} */ ([]);\n    this.readRawGeometry_(pbf, rawFeature, flatCoordinates, ends);\n\n    const geometryType = getGeometryType(type, ends.length);\n\n    if (this.featureClass_ === RenderFeature) {\n      feature = new this.featureClass_(\n        geometryType,\n        flatCoordinates,\n        ends,\n        values,\n        id\n      );\n      feature.transform(options.dataProjection);\n    } else {\n      let geom;\n      if (geometryType == 'Polygon') {\n        const endss = inflateEnds(flatCoordinates, ends);\n        geom =\n          endss.length > 1\n            ? new MultiPolygon(flatCoordinates, 'XY', endss)\n            : new Polygon(flatCoordinates, 'XY', ends);\n      } else {\n        geom =\n          geometryType === 'Point'\n            ? new Point(flatCoordinates, 'XY')\n            : geometryType === 'LineString'\n            ? new LineString(flatCoordinates, 'XY')\n            : geometryType === 'MultiPoint'\n            ? new MultiPoint(flatCoordinates, 'XY')\n            : geometryType === 'MultiLineString'\n            ? new MultiLineString(flatCoordinates, 'XY', ends)\n            : null;\n      }\n      const ctor = /** @type {typeof import(\"../Feature.js\").default} */ (\n        this.featureClass_\n      );\n      feature = new ctor();\n      if (this.geometryName_) {\n        feature.setGeometryName(this.geometryName_);\n      }\n      const geometry = transformGeometryWithOptions(geom, false, options);\n      feature.setGeometry(geometry);\n      if (id !== undefined) {\n        feature.setId(id);\n      }\n      feature.setProperties(values, true);\n    }\n\n    return feature;\n  }\n\n  /**\n   * @return {import(\"./Feature.js\").Type} Format.\n   */\n  getType() {\n    return 'arraybuffer';\n  }\n\n  /**\n   * Read all features.\n   *\n   * @param {ArrayBuffer} source Source.\n   * @param {import(\"./Feature.js\").ReadOptions} [options] Read options.\n   * @return {Array<import(\"../Feature.js\").FeatureLike>} Features.\n   * @api\n   */\n  readFeatures(source, options) {\n    const layers = this.layers_;\n    options = this.adaptOptions(options);\n    const dataProjection = get(options.dataProjection);\n    dataProjection.setWorldExtent(options.extent);\n    options.dataProjection = dataProjection;\n\n    const pbf = new PBF(/** @type {ArrayBuffer} */ (source));\n    const pbfLayers = pbf.readFields(layersPBFReader, {});\n    const features = [];\n    for (const name in pbfLayers) {\n      if (layers && !layers.includes(name)) {\n        continue;\n      }\n      const pbfLayer = pbfLayers[name];\n\n      const extent = pbfLayer ? [0, 0, pbfLayer.extent, pbfLayer.extent] : null;\n      dataProjection.setExtent(extent);\n\n      for (let i = 0, ii = pbfLayer.length; i < ii; ++i) {\n        const rawFeature = readRawFeature(pbf, pbfLayer, i);\n        const feature = this.createFeature_(pbf, rawFeature, options);\n        if (feature !== null) {\n          features.push(feature);\n        }\n      }\n    }\n\n    return features;\n  }\n\n  /**\n   * Read the projection from the source.\n   *\n   * @param {Document|Element|Object|string} source Source.\n   * @return {import(\"../proj/Projection.js\").default} Projection.\n   * @api\n   */\n  readProjection(source) {\n    return this.dataProjection;\n  }\n\n  /**\n   * Sets the layers that features will be read from.\n   * @param {Array<string>} layers Layers.\n   * @api\n   */\n  setLayers(layers) {\n    this.layers_ = layers;\n  }\n}\n\n/**\n * Reader callback for parsing layers.\n * @param {number} tag The tag.\n * @param {Object} layers The layers object.\n * @param {PBF} pbf The PBF.\n */\nfunction layersPBFReader(tag, layers, pbf) {\n  if (tag === 3) {\n    const layer = {\n      keys: [],\n      values: [],\n      features: [],\n    };\n    const end = pbf.readVarint() + pbf.pos;\n    pbf.readFields(layerPBFReader, layer, end);\n    layer.length = layer.features.length;\n    if (layer.length) {\n      layers[layer.name] = layer;\n    }\n  }\n}\n\n/**\n * Reader callback for parsing layer.\n * @param {number} tag The tag.\n * @param {Object} layer The layer object.\n * @param {PBF} pbf The PBF.\n */\nfunction layerPBFReader(tag, layer, pbf) {\n  if (tag === 15) {\n    layer.version = pbf.readVarint();\n  } else if (tag === 1) {\n    layer.name = pbf.readString();\n  } else if (tag === 5) {\n    layer.extent = pbf.readVarint();\n  } else if (tag === 2) {\n    layer.features.push(pbf.pos);\n  } else if (tag === 3) {\n    layer.keys.push(pbf.readString());\n  } else if (tag === 4) {\n    let value = null;\n    const end = pbf.readVarint() + pbf.pos;\n    while (pbf.pos < end) {\n      tag = pbf.readVarint() >> 3;\n      value =\n        tag === 1\n          ? pbf.readString()\n          : tag === 2\n          ? pbf.readFloat()\n          : tag === 3\n          ? pbf.readDouble()\n          : tag === 4\n          ? pbf.readVarint64()\n          : tag === 5\n          ? pbf.readVarint()\n          : tag === 6\n          ? pbf.readSVarint()\n          : tag === 7\n          ? pbf.readBoolean()\n          : null;\n    }\n    layer.values.push(value);\n  }\n}\n\n/**\n * Reader callback for parsing feature.\n * @param {number} tag The tag.\n * @param {Object} feature The feature object.\n * @param {PBF} pbf The PBF.\n */\nfunction featurePBFReader(tag, feature, pbf) {\n  if (tag == 1) {\n    feature.id = pbf.readVarint();\n  } else if (tag == 2) {\n    const end = pbf.readVarint() + pbf.pos;\n    while (pbf.pos < end) {\n      const key = feature.layer.keys[pbf.readVarint()];\n      const value = feature.layer.values[pbf.readVarint()];\n      feature.properties[key] = value;\n    }\n  } else if (tag == 3) {\n    feature.type = pbf.readVarint();\n  } else if (tag == 4) {\n    feature.geometry = pbf.pos;\n  }\n}\n\n/**\n * Read a raw feature from the pbf offset stored at index `i` in the raw layer.\n * @param {PBF} pbf PBF.\n * @param {Object} layer Raw layer.\n * @param {number} i Index of the feature in the raw layer's `features` array.\n * @return {Object} Raw feature.\n */\nfunction readRawFeature(pbf, layer, i) {\n  pbf.pos = layer.features[i];\n  const end = pbf.readVarint() + pbf.pos;\n\n  const feature = {\n    layer: layer,\n    type: 0,\n    properties: {},\n  };\n  pbf.readFields(featurePBFReader, feature, end);\n  return feature;\n}\n\n/**\n * @param {number} type The raw feature's geometry type\n * @param {number} numEnds Number of ends of the flat coordinates of the\n * geometry.\n * @return {import(\"../geom/Geometry.js\").Type} The geometry type.\n */\nfunction getGeometryType(type, numEnds) {\n  /** @type {import(\"../geom/Geometry.js\").Type} */\n  let geometryType;\n  if (type === 1) {\n    geometryType = numEnds === 1 ? 'Point' : 'MultiPoint';\n  } else if (type === 2) {\n    geometryType = numEnds === 1 ? 'LineString' : 'MultiLineString';\n  } else if (type === 3) {\n    geometryType = 'Polygon';\n    // MultiPolygon not relevant for rendering - winding order determines\n    // outer rings of polygons.\n  }\n  return geometryType;\n}\n\nexport default MVT;\n","/**\n * @module ol/layer/VectorTile\n */\nimport BaseVectorLayer from './BaseVector.js';\nimport CanvasVectorTileLayerRenderer from '../renderer/canvas/VectorTileLayer.js';\nimport TileProperty from './TileProperty.js';\nimport {assert} from '../asserts.js';\n\n/***\n * @template Return\n * @typedef {import(\"../Observable\").OnSignature<import(\"../Observable\").EventTypes, import(\"../events/Event.js\").default, Return> &\n *   import(\"../Observable\").OnSignature<import(\"./Base\").BaseLayerObjectEventTypes|\n *     import(\"./Layer.js\").LayerEventType|'change:preload'|'change:useInterimTilesOnError', import(\"../Object\").ObjectEvent, Return> &\n *   import(\"../Observable\").OnSignature<import(\"../render/EventType\").LayerRenderEventTypes, import(\"../render/Event\").default, Return> &\n *   import(\"../Observable\").CombinedOnSignature<import(\"../Observable\").EventTypes|import(\"./Base\").BaseLayerObjectEventTypes|\n *     import(\"./Layer.js\").LayerEventType|'change:preload'|'change:useInterimTilesOnError'|import(\"../render/EventType\").LayerRenderEventTypes, Return>} VectorTileLayerOnSignature\n */\n\n/**\n * @typedef {'hybrid' | 'vector'} VectorTileRenderType\n */\n\n/**\n * @typedef {Object} Options\n * @property {string} [className='ol-layer'] A CSS class name to set to the layer element.\n * @property {number} [opacity=1] Opacity (0, 1).\n * @property {boolean} [visible=true] Visibility.\n * @property {import(\"../extent.js\").Extent} [extent] The bounding extent for layer rendering.  The layer will not be\n * rendered outside of this extent.\n * @property {number} [zIndex] The z-index for layer rendering.  At rendering time, the layers\n * will be ordered, first by Z-index and then by position. When `undefined`, a `zIndex` of 0 is assumed\n * for layers that are added to the map's `layers` collection, or `Infinity` when the layer's `setMap()`\n * method was used.\n * @property {number} [minResolution] The minimum resolution (inclusive) at which this layer will be\n * visible.\n * @property {number} [maxResolution] The maximum resolution (exclusive) below which this layer will\n * be visible.\n * @property {number} [minZoom] The minimum view zoom level (exclusive) above which this layer will be\n * visible.\n * @property {number} [maxZoom] The maximum view zoom level (inclusive) at which this layer will\n * be visible.\n * @property {import(\"../render.js\").OrderFunction} [renderOrder] Render order. Function to be used when sorting\n * features before rendering. By default features are drawn in the order that they are created. Use\n * `null` to avoid the sort, but get an undefined draw order.\n * @property {number} [renderBuffer=100] The buffer in pixels around the tile extent used by the\n * renderer when getting features from the vector tile for the rendering or hit-detection.\n * Recommended value: Vector tiles are usually generated with a buffer, so this value should match\n * the largest possible buffer of the used tiles. It should be at least the size of the largest\n * point symbol or line width.\n * @property {VectorTileRenderType} [renderMode='hybrid'] Render mode for vector tiles:\n *  * `'hybrid'`: Polygon and line elements are rendered as images, so pixels are scaled during zoom\n *    animations. Point symbols and texts are accurately rendered as vectors and can stay upright on\n *    rotated views.\n *  * `'vector'`: Everything is rendered as vectors. Use this mode for improved performance on vector\n *    tile layers with only a few rendered features (e.g. for highlighting a subset of features of\n *    another layer with the same source).\n * @property {import(\"../source/VectorTile.js\").default} [source] Source.\n * @property {import(\"../Map.js\").default} [map] Sets the layer as overlay on a map. The map will not manage\n * this layer in its layers collection, and the layer will be rendered on top. This is useful for\n * temporary layers. The standard way to add a layer to a map and have it managed by the map is to\n * use [map.addLayer()]{@link import(\"../Map.js\").default#addLayer}.\n * @property {boolean} [declutter=false] Declutter images and text. Decluttering is applied to all\n * image and text styles of all Vector and VectorTile layers that have set this to `true`. The priority\n * is defined by the z-index of the layer, the `zIndex` of the style and the render order of features.\n * Higher z-index means higher priority. Within the same z-index, a feature rendered before another has\n * higher priority.\n *\n * As an optimization decluttered features from layers with the same `className` are rendered above\n * the fill and stroke styles of all of those layers regardless of z-index.  To opt out of this\n * behavior and place declutterd features with their own layer configure the layer with a `className`\n * other than `ol-layer`.\n * @property {import(\"../style/Style.js\").StyleLike|null} [style] Layer style. When set to `null`, only\n * features that have their own style will be rendered. See {@link module:ol/style/Style~Style} for the default style\n * which will be used if this is not set.\n * @property {import(\"./Base.js\").BackgroundColor|false} [background] Background color for the layer. If not specified, no\n * background will be rendered.\n * @property {boolean} [updateWhileAnimating=false] When set to `true`, feature batches will be\n * recreated during animations. This means that no vectors will be shown clipped, but the setting\n * will have a performance impact for large amounts of vector data. When set to `false`, batches\n * will be recreated when no animation is active.\n * @property {boolean} [updateWhileInteracting=false] When set to `true`, feature batches will be\n * recreated during interactions. See also `updateWhileAnimating`.\n * @property {number} [preload=0] Preload. Load low-resolution tiles up to `preload` levels. `0`\n * means no preloading.\n * @property {boolean} [useInterimTilesOnError=true] Use interim tiles on error.\n * @property {Object<string, *>} [properties] Arbitrary observable properties. Can be accessed with `#get()` and `#set()`.\n */\n\n/**\n * @classdesc\n * Layer for vector tile data that is rendered client-side.\n * Note that any property set in the options is set as a {@link module:ol/Object~BaseObject}\n * property on the layer object; for example, setting `title: 'My Title'` in the\n * options means that `title` is observable, and has get/set accessors.\n *\n * @param {Options} [options] Options.\n * @extends {BaseVectorLayer<import(\"../source/VectorTile.js\").default, CanvasVectorTileLayerRenderer>}\n * @api\n */\nclass VectorTileLayer extends BaseVectorLayer {\n  /**\n   * @param {Options} [options] Options.\n   */\n  constructor(options) {\n    options = options ? options : {};\n\n    const baseOptions = /** @type {Object} */ (Object.assign({}, options));\n    delete baseOptions.preload;\n    delete baseOptions.useInterimTilesOnError;\n\n    super(\n      /** @type {import(\"./BaseVector.js\").Options<import(\"../source/VectorTile.js\").default>} */ (\n        baseOptions\n      )\n    );\n\n    /***\n     * @type {VectorTileLayerOnSignature<import(\"../events\").EventsKey>}\n     */\n    this.on;\n\n    /***\n     * @type {VectorTileLayerOnSignature<import(\"../events\").EventsKey>}\n     */\n    this.once;\n\n    /***\n     * @type {VectorTileLayerOnSignature<void>}\n     */\n    this.un;\n\n    const renderMode = options.renderMode || 'hybrid';\n    // `renderMode` must be `'hybrid'` or `'vector'`.\n    assert(renderMode == 'hybrid' || renderMode == 'vector', 28);\n\n    /**\n     * @private\n     * @type {VectorTileRenderType}\n     */\n    this.renderMode_ = renderMode;\n\n    this.setPreload(options.preload ? options.preload : 0);\n    this.setUseInterimTilesOnError(\n      options.useInterimTilesOnError !== undefined\n        ? options.useInterimTilesOnError\n        : true\n    );\n\n    /**\n     * @return {import(\"./Base.js\").BackgroundColor} Background color.\n     * @function\n     * @api\n     */\n    this.getBackground;\n\n    /**\n     * @param {import(\"./Base.js\").BackgroundColor} background Background color.\n     * @function\n     * @api\n     */\n    this.setBackground;\n  }\n\n  createRenderer() {\n    return new CanvasVectorTileLayerRenderer(this);\n  }\n\n  /**\n   * Get the topmost feature that intersects the given pixel on the viewport. Returns a promise\n   * that resolves with an array of features. The array will either contain the topmost feature\n   * when a hit was detected, or it will be empty.\n   *\n   * The hit detection algorithm used for this method is optimized for performance, but is less\n   * accurate than the one used in [map.getFeaturesAtPixel()]{@link import(\"../Map.js\").default#getFeaturesAtPixel}.\n   * Text is not considered, and icons are only represented by their bounding box instead of the exact\n   * image.\n   *\n   * @param {import(\"../pixel.js\").Pixel} pixel Pixel.\n   * @return {Promise<Array<import(\"../Feature\").FeatureLike>>} Promise that resolves with an array of features.\n   * @api\n   */\n  getFeatures(pixel) {\n    return super.getFeatures(pixel);\n  }\n\n  /**\n   * @return {VectorTileRenderType} The render mode.\n   */\n  getRenderMode() {\n    return this.renderMode_;\n  }\n\n  /**\n   * Return the level as number to which we will preload tiles up to.\n   * @return {number} The level to preload tiles up to.\n   * @observable\n   * @api\n   */\n  getPreload() {\n    return /** @type {number} */ (this.get(TileProperty.PRELOAD));\n  }\n\n  /**\n   * Whether we use interim tiles on error.\n   * @return {boolean} Use interim tiles on error.\n   * @observable\n   * @api\n   */\n  getUseInterimTilesOnError() {\n    return /** @type {boolean} */ (\n      this.get(TileProperty.USE_INTERIM_TILES_ON_ERROR)\n    );\n  }\n\n  /**\n   * Set the level as number to which we will preload tiles up to.\n   * @param {number} preload The level to preload tiles up to.\n   * @observable\n   * @api\n   */\n  setPreload(preload) {\n    this.set(TileProperty.PRELOAD, preload);\n  }\n\n  /**\n   * Set whether we use interim tiles on error.\n   * @param {boolean} useInterimTilesOnError Use interim tiles on error.\n   * @observable\n   * @api\n   */\n  setUseInterimTilesOnError(useInterimTilesOnError) {\n    this.set(TileProperty.USE_INTERIM_TILES_ON_ERROR, useInterimTilesOnError);\n  }\n}\n\nexport default VectorTileLayer;\n","/**\n * @module ol/layer/MapboxVector\n */\nimport BaseEvent from '../events/Event.js';\nimport EventType from '../events/EventType.js';\nimport MVT from '../format/MVT.js';\nimport VectorTileLayer from '../layer/VectorTile.js';\nimport VectorTileSource from '../source/VectorTile.js';\nimport {applyBackground, applyStyle} from 'ol-mapbox-style';\n\n/**\n * @classdesc\n * Event emitted on configuration or loading error.\n */\nclass ErrorEvent extends BaseEvent {\n  /**\n   * @param {Error} error error object.\n   */\n  constructor(error) {\n    super(EventType.ERROR);\n\n    /**\n     * @type {Error}\n     */\n    this.error = error;\n  }\n}\n\n/**\n * @typedef {Object} Options\n * @property {string} styleUrl The URL of the Mapbox style object to use for this layer.  For a\n * style created with Mapbox Studio and hosted on Mapbox, this will look like\n * 'mapbox://styles/you/your-style'.\n * @property {string} [accessToken] The access token for your Mapbox style. This has to be provided\n * for `mapbox://` style urls. For `https://` and other urls, any access key must be the last query\n * parameter of the style url.\n * @property {string} [source] If your style uses more than one source, you need to use either the\n * `source` property or the `layers` property to limit rendering to a single vector source.  The\n * `source` property corresponds to the id of a vector source in your Mapbox style.\n * @property {Array<string>} [layers] Limit rendering to the list of included layers.  All layers\n * must share the same vector source.  If your style uses more than one source, you need to use\n * either the `source` property or the `layers` property to limit rendering to a single vector\n * source.\n * @property {boolean} [declutter=true] Declutter images and text. Decluttering is applied to all\n * image and text styles of all Vector and VectorTile layers that have set this to `true`. The priority\n * is defined by the z-index of the layer, the `zIndex` of the style and the render order of features.\n * Higher z-index means higher priority. Within the same z-index, a feature rendered before another has\n * higher priority.\n *\n * As an optimization decluttered features from layers with the same `className` are rendered above\n * the fill and stroke styles of all of those layers regardless of z-index.  To opt out of this\n * behavior and place declutterd features with their own layer configure the layer with a `className`\n * other than `ol-layer`.\n * @property {import(\"./Base.js\").BackgroundColor|false} [background] Background color for the layer.\n * If not specified, the background from the Mapbox style object will be used. Set to `false` to prevent\n * the Mapbox style's background from being used.\n * @property {string} [className='ol-layer'] A CSS class name to set to the layer element.\n * @property {number} [opacity=1] Opacity (0, 1).\n * @property {boolean} [visible=true] Visibility.\n * @property {import(\"../extent.js\").Extent} [extent] The bounding extent for layer rendering.  The layer will not be\n * rendered outside of this extent.\n * @property {number} [zIndex] The z-index for layer rendering.  At rendering time, the layers\n * will be ordered, first by Z-index and then by position. When `undefined`, a `zIndex` of 0 is assumed\n * for layers that are added to the map's `layers` collection, or `Infinity` when the layer's `setMap()`\n * method was used.\n * @property {number} [minResolution] The minimum resolution (inclusive) at which this layer will be\n * visible.\n * @property {number} [maxResolution] The maximum resolution (exclusive) below which this layer will\n * be visible. If neither `maxResolution` nor `minZoom` are defined, the layer's `maxResolution` will\n * match the style source's `minzoom`.\n * @property {number} [minZoom] The minimum view zoom level (exclusive) above which this layer will\n * be visible. If neither `maxResolution` nor `minZoom` are defined, the layer's `minZoom` will match\n * the style source's `minzoom`.\n * @property {number} [maxZoom] The maximum view zoom level (inclusive) at which this layer will\n * be visible.\n * @property {import(\"../render.js\").OrderFunction} [renderOrder] Render order. Function to be used when sorting\n * features before rendering. By default features are drawn in the order that they are created. Use\n * `null` to avoid the sort, but get an undefined draw order.\n * @property {number} [renderBuffer=100] The buffer in pixels around the tile extent used by the\n * renderer when getting features from the vector tile for the rendering or hit-detection.\n * Recommended value: Vector tiles are usually generated with a buffer, so this value should match\n * the largest possible buffer of the used tiles. It should be at least the size of the largest\n * point symbol or line width.\n * @property {import(\"./VectorTile.js\").VectorTileRenderType} [renderMode='hybrid'] Render mode for vector tiles:\n *  * `'hybrid'`: Polygon and line elements are rendered as images, so pixels are scaled during zoom\n *    animations. Point symbols and texts are accurately rendered as vectors and can stay upright on\n *    rotated views.\n *  * `'vector'`: Everything is rendered as vectors. Use this mode for improved performance on vector\n *    tile layers with only a few rendered features (e.g. for highlighting a subset of features of\n *    another layer with the same source).\n * @property {import(\"../Map.js\").default} [map] Sets the layer as overlay on a map. The map will not manage\n * this layer in its layers collection, and the layer will be rendered on top. This is useful for\n * temporary layers. The standard way to add a layer to a map and have it managed by the map is to\n * use [map.addLayer()]{@link import(\"../Map.js\").default#addLayer}.\n * @property {boolean} [updateWhileAnimating=false] When set to `true`, feature batches will be\n * recreated during animations. This means that no vectors will be shown clipped, but the setting\n * will have a performance impact for large amounts of vector data. When set to `false`, batches\n * will be recreated when no animation is active.\n * @property {boolean} [updateWhileInteracting=false] When set to `true`, feature batches will be\n * recreated during interactions. See also `updateWhileAnimating`.\n * @property {number} [preload=0] Preload. Load low-resolution tiles up to `preload` levels. `0`\n * means no preloading.\n * @property {boolean} [useInterimTilesOnError=true] Use interim tiles on error.\n * @property {Object<string, *>} [properties] Arbitrary observable properties. Can be accessed with `#get()` and `#set()`.\n */\n\n/**\n * @classdesc\n * A vector tile layer based on a Mapbox style that uses a single vector source.  Configure\n * the layer with the `styleUrl` and `accessToken` shown in Mapbox Studio's share panel.\n * If the style uses more than one source, use the `source` property to choose a single\n * vector source.  If you want to render a subset of the layers in the style, use the `layers`\n * property (all layers must share the same vector source).  See the constructor options for\n * more detail.\n *\n *     const map = new Map({\n *       view: new View({\n *         center: [0, 0],\n *         zoom: 1,\n *       }),\n *       layers: [\n *         new MapboxVectorLayer({\n *           styleUrl: 'mapbox://styles/mapbox/bright-v9',\n *           accessToken: 'your-mapbox-access-token-here',\n *         }),\n *       ],\n *       target: 'map',\n *     });\n *\n * On configuration or loading error, the layer will trigger an `'error'` event.  Listeners\n * will receive an object with an `error` property that can be used to diagnose the problem.\n *\n * **Note for users of the full build**: The `MapboxVectorLayer` requires the\n * [ol-mapbox-style](https://github.com/openlayers/ol-mapbox-style) library to be loaded as well.\n *\n * @param {Options} options Options.\n * @extends {VectorTileLayer}\n * @fires module:ol/events/Event~BaseEvent#event:error\n * @api\n */\nclass MapboxVectorLayer extends VectorTileLayer {\n  /**\n   * @param {Options} options Layer options.  At a minimum, `styleUrl` and `accessToken`\n   * must be provided.\n   */\n  constructor(options) {\n    const declutter = 'declutter' in options ? options.declutter : true;\n    const source = new VectorTileSource({\n      state: 'loading',\n      format: new MVT(),\n    });\n\n    super({\n      source: source,\n      background: options.background,\n      declutter: declutter,\n      className: options.className,\n      opacity: options.opacity,\n      visible: options.visible,\n      zIndex: options.zIndex,\n      minResolution: options.minResolution,\n      maxResolution: options.maxResolution,\n      minZoom: options.minZoom,\n      maxZoom: options.maxZoom,\n      renderOrder: options.renderOrder,\n      renderBuffer: options.renderBuffer,\n      renderMode: options.renderMode,\n      map: options.map,\n      updateWhileAnimating: options.updateWhileAnimating,\n      updateWhileInteracting: options.updateWhileInteracting,\n      preload: options.preload,\n      useInterimTilesOnError: options.useInterimTilesOnError,\n      properties: options.properties,\n    });\n\n    if (options.accessToken) {\n      this.accessToken = options.accessToken;\n    }\n    const url = options.styleUrl;\n    //FIXME Remove type cast as soon as we know why it is needed\n    applyStyle(/** @type {*} */ (this), url, options.layers || options.source, {\n      accessToken: this.accessToken,\n    })\n      .then(() => {\n        source.setState('ready');\n      })\n      .catch((error) => {\n        this.dispatchEvent(new ErrorEvent(error));\n        const source = this.getSource();\n        source.setState('error');\n      });\n    if (this.getBackground() === undefined) {\n      //FIXME Remove type cast as soon as we know why it is needed\n      applyBackground(/** @type {*} */ (this), options.styleUrl, {\n        accessToken: this.accessToken,\n      });\n    }\n  }\n}\n\nexport default MapboxVectorLayer;\n","/**\n * @module ol/layer/VectorImage\n */\nimport BaseVectorLayer from './BaseVector.js';\nimport CanvasVectorImageLayerRenderer from '../renderer/canvas/VectorImageLayer.js';\n\n/**\n * @template {import(\"../source/Vector.js\").default} VectorSourceType\n * @typedef {Object} Options\n * @property {string} [className='ol-layer'] A CSS class name to set to the layer element.\n * @property {number} [opacity=1] Opacity (0, 1).\n * @property {boolean} [visible=true] Visibility.\n * @property {import(\"../extent.js\").Extent} [extent] The bounding extent for layer rendering.  The layer will not be\n * rendered outside of this extent.\n * @property {number} [zIndex] The z-index for layer rendering.  At rendering time, the layers\n * will be ordered, first by Z-index and then by position. When `undefined`, a `zIndex` of 0 is assumed\n * for layers that are added to the map's `layers` collection, or `Infinity` when the layer's `setMap()`\n * method was used.\n * @property {number} [minResolution] The minimum resolution (inclusive) at which this layer will be\n * visible.\n * @property {number} [maxResolution] The maximum resolution (exclusive) below which this layer will\n * be visible.\n * @property {number} [minZoom] The minimum view zoom level (exclusive) above which this layer will be\n * visible.\n * @property {number} [maxZoom] The maximum view zoom level (inclusive) at which this layer will\n * be visible.\n * @property {import(\"../render.js\").OrderFunction} [renderOrder] Render order. Function to be used when sorting\n * features before rendering. By default features are drawn in the order that they are created. Use\n * `null` to avoid the sort, but get an undefined draw order.\n * @property {number} [renderBuffer=100] The buffer in pixels around the viewport extent used by the\n * renderer when getting features from the vector source for the rendering or hit-detection.\n * Recommended value: the size of the largest symbol, line width or label.\n * @property {VectorSourceType} [source] Source.\n * @property {import(\"../Map.js\").default} [map] Sets the layer as overlay on a map. The map will not manage\n * this layer in its layers collection, and the layer will be rendered on top. This is useful for\n * temporary layers. The standard way to add a layer to a map and have it managed by the map is to\n * use [map.addLayer()]{@link import(\"../Map.js\").default#addLayer}.\n * @property {boolean} [declutter=false] Declutter images and text on this layer. The priority is defined\n * by the `zIndex` of the style and the render order of features. Higher z-index means higher priority.\n * Within the same z-index, a feature rendered before another has higher priority.\n * @property {import(\"../style/Style.js\").StyleLike|null} [style] Layer style. When set to `null`, only\n * features that have their own style will be rendered. See {@link module:ol/style/Style~Style} for the default style\n * which will be used if this is not set.\n * @property {number} [imageRatio=1] Ratio by which the rendered extent should be larger than the\n * viewport extent. A larger ratio avoids cut images during panning, but will cause a decrease in performance.\n * @property {Object<string, *>} [properties] Arbitrary observable properties. Can be accessed with `#get()` and `#set()`.\n */\n\n/**\n * @classdesc\n * Vector data is rendered client-side, to an image. This layer type provides great performance\n * during panning and zooming, but point symbols and texts are always rotated with the view and\n * pixels are scaled during zoom animations. For more accurate rendering of vector data, use\n * {@link module:ol/layer/Vector~VectorLayer} instead.\n *\n * Note that any property set in the options is set as a {@link module:ol/Object~BaseObject}\n * property on the layer object; for example, setting `title: 'My Title'` in the\n * options means that `title` is observable, and has get/set accessors.\n *\n * @template {import(\"../source/Vector.js\").default} VectorSourceType\n * @extends {BaseVectorLayer<VectorSourceType, CanvasVectorImageLayerRenderer>}\n * @api\n */\nclass VectorImageLayer extends BaseVectorLayer {\n  /**\n   * @param {Options<VectorSourceType>} [options] Options.\n   */\n  constructor(options) {\n    options = options ? options : {};\n\n    const baseOptions = Object.assign({}, options);\n    delete baseOptions.imageRatio;\n    super(baseOptions);\n\n    /**\n     * @type {number}\n     * @private\n     */\n    this.imageRatio_ =\n      options.imageRatio !== undefined ? options.imageRatio : 1;\n  }\n\n  /**\n   * @return {number} Ratio between rendered extent size and viewport extent size.\n   */\n  getImageRatio() {\n    return this.imageRatio_;\n  }\n\n  createRenderer() {\n    return new CanvasVectorImageLayerRenderer(this);\n  }\n}\n\nexport default VectorImageLayer;\n","/**\n * @module ol/layer/WebGLPoints\n */\nimport Layer from './Layer.js';\nimport WebGLPointsLayerRenderer from '../renderer/webgl/PointsLayer.js';\nimport {parseLiteralStyle} from '../webgl/styleparser.js';\n\n/**\n * @template {import(\"../source/Vector.js\").default<import(\"../geom/Point.js\").default>} VectorSourceType\n * @typedef {Object} Options\n * @property {import('../style/literal.js').LiteralStyle} style Literal style to apply to the layer features.\n * @property {string} [className='ol-layer'] A CSS class name to set to the layer element.\n * @property {number} [opacity=1] Opacity (0, 1).\n * @property {boolean} [visible=true] Visibility.\n * @property {import(\"../extent.js\").Extent} [extent] The bounding extent for layer rendering.  The layer will not be\n * rendered outside of this extent.\n * @property {number} [zIndex] The z-index for layer rendering.  At rendering time, the layers\n * will be ordered, first by Z-index and then by position. When `undefined`, a `zIndex` of 0 is assumed\n * for layers that are added to the map's `layers` collection, or `Infinity` when the layer's `setMap()`\n * method was used.\n * @property {number} [minResolution] The minimum resolution (inclusive) at which this layer will be\n * visible.\n * @property {number} [maxResolution] The maximum resolution (exclusive) below which this layer will\n * be visible.\n * @property {number} [minZoom] The minimum view zoom level (exclusive) above which this layer will be\n * visible.\n * @property {number} [maxZoom] The maximum view zoom level (inclusive) at which this layer will\n * be visible.\n * @property {VectorSourceType} [source] Point source.\n * @property {boolean} [disableHitDetection=false] Setting this to true will provide a slight performance boost, but will\n * prevent all hit detection on the layer.\n * @property {Object<string, *>} [properties] Arbitrary observable properties. Can be accessed with `#get()` and `#set()`.\n */\n\n/**\n * @classdesc\n * Layer optimized for rendering large point datasets. Takes a `style` property which\n * is a serializable JSON object describing how the layer should be rendered.\n *\n * Here are a few samples of literal style objects:\n * ```js\n * const style = {\n *   symbol: {\n *     symbolType: 'circle',\n *     size: 8,\n *     color: '#33AAFF',\n *     opacity: 0.9\n *   }\n * }\n * ```\n *\n * ```js\n * const style = {\n *   symbol: {\n *     symbolType: 'image',\n *     offset: [0, 12],\n *     size: [4, 8],\n *     src: '../static/exclamation-mark.png'\n *   }\n * }\n * ```\n *\n * **Important: a `WebGLPoints` layer must be manually disposed when removed, otherwise the underlying WebGL context\n * will not be garbage collected.**\n *\n * Note that any property set in the options is set as a {@link module:ol/Object~BaseObject}\n * property on the layer object; for example, setting `title: 'My Title'` in the\n * options means that `title` is observable, and has get/set accessors.\n *\n * @template {import(\"../source/Vector.js\").default<import(\"../geom/Point.js\").default>} VectorSourceType\n * @extends {Layer<VectorSourceType, WebGLPointsLayerRenderer>}\n * @fires import(\"../render/Event.js\").RenderEvent\n */\nclass WebGLPointsLayer extends Layer {\n  /**\n   * @param {Options<VectorSourceType>} options Options.\n   */\n  constructor(options) {\n    const baseOptions = Object.assign({}, options);\n\n    super(baseOptions);\n\n    /**\n     * @private\n     * @type {import('../webgl/styleparser.js').StyleParseResult}\n     */\n    this.parseResult_ = parseLiteralStyle(options.style);\n\n    /**\n     * @type {Object<string, (string|number|Array<number>|boolean)>}\n     * @private\n     */\n    this.styleVariables_ = options.style.variables || {};\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.hitDetectionDisabled_ = !!options.disableHitDetection;\n  }\n\n  createRenderer() {\n    const attributes = Object.keys(this.parseResult_.attributes).map(\n      (name) => ({\n        name,\n        ...this.parseResult_.attributes[name],\n      })\n    );\n    return new WebGLPointsLayerRenderer(this, {\n      vertexShader: this.parseResult_.builder.getSymbolVertexShader(),\n      fragmentShader: this.parseResult_.builder.getSymbolFragmentShader(),\n      hitDetectionEnabled: !this.hitDetectionDisabled_,\n      uniforms: this.parseResult_.uniforms,\n      attributes:\n        /** @type {Array<import('../renderer/webgl/PointsLayer.js').CustomAttribute>} */ (\n          attributes\n        ),\n    });\n  }\n\n  /**\n   * Update any variables used by the layer style and trigger a re-render.\n   * @param {Object<string, number>} variables Variables to update.\n   */\n  updateStyleVariables(variables) {\n    Object.assign(this.styleVariables_, variables);\n    this.changed();\n  }\n}\n\nexport default WebGLPointsLayer;\n","/**\n * @module ol/layer/WebGLTile\n */\nimport BaseTileLayer from './BaseTile.js';\nimport LayerProperty from '../layer/Property.js';\nimport WebGLTileLayerRenderer, {\n  Attributes,\n  Uniforms,\n} from '../renderer/webgl/TileLayer.js';\nimport {\n  PALETTE_TEXTURE_ARRAY,\n  ValueTypes,\n  expressionToGlsl,\n  getStringNumberEquivalent,\n  uniformNameForVariable,\n} from '../style/expressions.js';\n\n/**\n * @typedef {import(\"../source/DataTile.js\").default|import(\"../source/TileImage.js\").default} SourceType\n */\n\n/**\n * @typedef {Object} Style\n * Translates tile data to rendered pixels.\n *\n * @property {Object<string, (string|number)>} [variables] Style variables.  Each variable must hold a number or string.  These\n * variables can be used in the `color`, `brightness`, `contrast`, `exposure`, `saturation` and `gamma`\n * {@link import(\"../style/expressions.js\").ExpressionValue expressions}, using the `['var', 'varName']` operator.\n * To update style variables, use the {@link import(\"./WebGLTile.js\").default#updateStyleVariables} method.\n * @property {import(\"../style/expressions.js\").ExpressionValue} [color] An expression applied to color values.\n * @property {import(\"../style/expressions.js\").ExpressionValue} [brightness=0] Value used to decrease or increase\n * the layer brightness.  Values range from -1 to 1.\n * @property {import(\"../style/expressions.js\").ExpressionValue} [contrast=0] Value used to decrease or increase\n * the layer contrast.  Values range from -1 to 1.\n * @property {import(\"../style/expressions.js\").ExpressionValue} [exposure=0] Value used to decrease or increase\n * the layer exposure.  Values range from -1 to 1.\n * @property {import(\"../style/expressions.js\").ExpressionValue} [saturation=0] Value used to decrease or increase\n * the layer saturation.  Values range from -1 to 1.\n * @property {import(\"../style/expressions.js\").ExpressionValue} [gamma=1] Apply a gamma correction to the layer.\n * Values range from 0 to infinity.\n */\n\n/**\n * @typedef {Object} Options\n * @property {Style} [style] Style to apply to the layer.\n * @property {string} [className='ol-layer'] A CSS class name to set to the layer element.\n * @property {number} [opacity=1] Opacity (0, 1).\n * @property {boolean} [visible=true] Visibility.\n * @property {import(\"../extent.js\").Extent} [extent] The bounding extent for layer rendering.  The layer will not be\n * rendered outside of this extent.\n * @property {number} [zIndex] The z-index for layer rendering.  At rendering time, the layers\n * will be ordered, first by Z-index and then by position. When `undefined`, a `zIndex` of 0 is assumed\n * for layers that are added to the map's `layers` collection, or `Infinity` when the layer's `setMap()`\n * method was used.\n * @property {number} [minResolution] The minimum resolution (inclusive) at which this layer will be\n * visible.\n * @property {number} [maxResolution] The maximum resolution (exclusive) below which this layer will\n * be visible.\n * @property {number} [minZoom] The minimum view zoom level (exclusive) above which this layer will be\n * visible.\n * @property {number} [maxZoom] The maximum view zoom level (inclusive) at which this layer will\n * be visible.\n * @property {number} [preload=0] Preload. Load low-resolution tiles up to `preload` levels. `0`\n * means no preloading.\n * @property {SourceType} [source] Source for this layer.\n * @property {Array<SourceType>|function(import(\"../extent.js\").Extent, number):Array<SourceType>} [sources] Array\n * of sources for this layer. Takes precedence over `source`. Can either be an array of sources, or a function that\n * expects an extent and a resolution (in view projection units per pixel) and returns an array of sources. See\n * {@link module:ol/source.sourcesFromTileGrid} for a helper function to generate sources that are organized in a\n * pyramid following the same pattern as a tile grid. **Note:** All sources must have the same band count and content.\n * @property {import(\"../Map.js\").default} [map] Sets the layer as overlay on a map. The map will not manage\n * this layer in its layers collection, and the layer will be rendered on top. This is useful for\n * temporary layers. The standard way to add a layer to a map and have it managed by the map is to\n * use {@link module:ol/Map~Map#addLayer}.\n * @property {boolean} [useInterimTilesOnError=true] Use interim tiles on error.\n * @property {number} [cacheSize=512] The internal texture cache size.  This needs to be large enough to render\n * two zoom levels worth of tiles.\n */\n\n/**\n * @typedef {Object} ParsedStyle\n * @property {string} vertexShader The vertex shader.\n * @property {string} fragmentShader The fragment shader.\n * @property {Object<string,import(\"../webgl/Helper.js\").UniformValue>} uniforms Uniform definitions.\n * @property {Array<import(\"../webgl/PaletteTexture.js\").default>} paletteTextures Palette textures.\n */\n\n/**\n * @param {Style} style The layer style.\n * @param {number} [bandCount] The number of bands.\n * @return {ParsedStyle} Shaders and uniforms generated from the style.\n */\nfunction parseStyle(style, bandCount) {\n  const vertexShader = `\n    attribute vec2 ${Attributes.TEXTURE_COORD};\n    uniform mat4 ${Uniforms.TILE_TRANSFORM};\n    uniform float ${Uniforms.TEXTURE_PIXEL_WIDTH};\n    uniform float ${Uniforms.TEXTURE_PIXEL_HEIGHT};\n    uniform float ${Uniforms.TEXTURE_RESOLUTION};\n    uniform float ${Uniforms.TEXTURE_ORIGIN_X};\n    uniform float ${Uniforms.TEXTURE_ORIGIN_Y};\n    uniform float ${Uniforms.DEPTH};\n\n    varying vec2 v_textureCoord;\n    varying vec2 v_mapCoord;\n\n    void main() {\n      v_textureCoord = ${Attributes.TEXTURE_COORD};\n      v_mapCoord = vec2(\n        ${Uniforms.TEXTURE_ORIGIN_X} + ${Uniforms.TEXTURE_RESOLUTION} * ${Uniforms.TEXTURE_PIXEL_WIDTH} * v_textureCoord[0],\n        ${Uniforms.TEXTURE_ORIGIN_Y} - ${Uniforms.TEXTURE_RESOLUTION} * ${Uniforms.TEXTURE_PIXEL_HEIGHT} * v_textureCoord[1]\n      );\n      gl_Position = ${Uniforms.TILE_TRANSFORM} * vec4(${Attributes.TEXTURE_COORD}, ${Uniforms.DEPTH}, 1.0);\n    }\n  `;\n\n  /**\n   * @type {import(\"../style/expressions.js\").ParsingContext}\n   */\n  const context = {\n    inFragmentShader: true,\n    variables: [],\n    attributes: [],\n    stringLiteralsMap: {},\n    functions: {},\n    bandCount: bandCount,\n    style: style,\n  };\n\n  const pipeline = [];\n\n  if (style.color !== undefined) {\n    const color = expressionToGlsl(context, style.color, ValueTypes.COLOR);\n    pipeline.push(`color = ${color};`);\n  }\n\n  if (style.contrast !== undefined) {\n    const contrast = expressionToGlsl(\n      context,\n      style.contrast,\n      ValueTypes.NUMBER\n    );\n    pipeline.push(\n      `color.rgb = clamp((${contrast} + 1.0) * color.rgb - (${contrast} / 2.0), vec3(0.0, 0.0, 0.0), vec3(1.0, 1.0, 1.0));`\n    );\n  }\n\n  if (style.exposure !== undefined) {\n    const exposure = expressionToGlsl(\n      context,\n      style.exposure,\n      ValueTypes.NUMBER\n    );\n    pipeline.push(\n      `color.rgb = clamp((${exposure} + 1.0) * color.rgb, vec3(0.0, 0.0, 0.0), vec3(1.0, 1.0, 1.0));`\n    );\n  }\n\n  if (style.saturation !== undefined) {\n    const saturation = expressionToGlsl(\n      context,\n      style.saturation,\n      ValueTypes.NUMBER\n    );\n    pipeline.push(`\n      float saturation = ${saturation} + 1.0;\n      float sr = (1.0 - saturation) * 0.2126;\n      float sg = (1.0 - saturation) * 0.7152;\n      float sb = (1.0 - saturation) * 0.0722;\n      mat3 saturationMatrix = mat3(\n        sr + saturation, sr, sr,\n        sg, sg + saturation, sg,\n        sb, sb, sb + saturation\n      );\n      color.rgb = clamp(saturationMatrix * color.rgb, vec3(0.0, 0.0, 0.0), vec3(1.0, 1.0, 1.0));\n    `);\n  }\n\n  if (style.gamma !== undefined) {\n    const gamma = expressionToGlsl(context, style.gamma, ValueTypes.NUMBER);\n    pipeline.push(`color.rgb = pow(color.rgb, vec3(1.0 / ${gamma}));`);\n  }\n\n  if (style.brightness !== undefined) {\n    const brightness = expressionToGlsl(\n      context,\n      style.brightness,\n      ValueTypes.NUMBER\n    );\n    pipeline.push(\n      `color.rgb = clamp(color.rgb + ${brightness}, vec3(0.0, 0.0, 0.0), vec3(1.0, 1.0, 1.0));`\n    );\n  }\n\n  /** @type {Object<string,import(\"../webgl/Helper\").UniformValue>} */\n  const uniforms = {};\n\n  const numVariables = context.variables.length;\n  if (numVariables > 1 && !style.variables) {\n    throw new Error(\n      `Missing variables in style (expected ${context.variables})`\n    );\n  }\n\n  for (let i = 0; i < numVariables; ++i) {\n    const variable = context.variables[i];\n    if (!(variable.name in style.variables)) {\n      throw new Error(`Missing '${variable.name}' in style variables`);\n    }\n    const uniformName = uniformNameForVariable(variable.name);\n    uniforms[uniformName] = function () {\n      let value = style.variables[variable.name];\n      if (typeof value === 'string') {\n        value = getStringNumberEquivalent(context, value);\n      }\n      return value !== undefined ? value : -9999999; // to avoid matching with the first string literal\n    };\n  }\n\n  const uniformDeclarations = Object.keys(uniforms).map(function (name) {\n    return `uniform float ${name};`;\n  });\n\n  const textureCount = Math.ceil(bandCount / 4);\n  uniformDeclarations.push(\n    `uniform sampler2D ${Uniforms.TILE_TEXTURE_ARRAY}[${textureCount}];`\n  );\n\n  if (context.paletteTextures) {\n    uniformDeclarations.push(\n      `uniform sampler2D ${PALETTE_TEXTURE_ARRAY}[${context.paletteTextures.length}];`\n    );\n  }\n\n  const functionDefintions = Object.keys(context.functions).map(function (\n    name\n  ) {\n    return context.functions[name];\n  });\n\n  const fragmentShader = `\n    #ifdef GL_FRAGMENT_PRECISION_HIGH\n    precision highp float;\n    #else\n    precision mediump float;\n    #endif\n\n    varying vec2 v_textureCoord;\n    varying vec2 v_mapCoord;\n    uniform vec4 ${Uniforms.RENDER_EXTENT};\n    uniform float ${Uniforms.TRANSITION_ALPHA};\n    uniform float ${Uniforms.TEXTURE_PIXEL_WIDTH};\n    uniform float ${Uniforms.TEXTURE_PIXEL_HEIGHT};\n    uniform float ${Uniforms.RESOLUTION};\n    uniform float ${Uniforms.ZOOM};\n\n    ${uniformDeclarations.join('\\n')}\n\n    ${functionDefintions.join('\\n')}\n\n    void main() {\n      if (\n        v_mapCoord[0] < ${Uniforms.RENDER_EXTENT}[0] ||\n        v_mapCoord[1] < ${Uniforms.RENDER_EXTENT}[1] ||\n        v_mapCoord[0] > ${Uniforms.RENDER_EXTENT}[2] ||\n        v_mapCoord[1] > ${Uniforms.RENDER_EXTENT}[3]\n      ) {\n        discard;\n      }\n\n      vec4 color = texture2D(${\n        Uniforms.TILE_TEXTURE_ARRAY\n      }[0],  v_textureCoord);\n\n      ${pipeline.join('\\n')}\n\n      if (color.a == 0.0) {\n        discard;\n      }\n\n      gl_FragColor = color;\n      gl_FragColor.rgb *= gl_FragColor.a;\n      gl_FragColor *= ${Uniforms.TRANSITION_ALPHA};\n    }`;\n\n  return {\n    vertexShader: vertexShader,\n    fragmentShader: fragmentShader,\n    uniforms: uniforms,\n    paletteTextures: context.paletteTextures,\n  };\n}\n\n/**\n * @classdesc\n * For layer sources that provide pre-rendered, tiled images in grids that are\n * organized by zoom levels for specific resolutions.\n * Note that any property set in the options is set as a {@link module:ol/Object~BaseObject}\n * property on the layer object; for example, setting `title: 'My Title'` in the\n * options means that `title` is observable, and has get/set accessors.\n *\n * @extends BaseTileLayer<SourceType, WebGLTileLayerRenderer>\n * @fires import(\"../render/Event.js\").RenderEvent\n * @api\n */\nclass WebGLTileLayer extends BaseTileLayer {\n  /**\n   * @param {Options} options Tile layer options.\n   */\n  constructor(options) {\n    options = options ? Object.assign({}, options) : {};\n\n    const style = options.style || {};\n    delete options.style;\n\n    const cacheSize = options.cacheSize;\n    delete options.cacheSize;\n\n    super(options);\n\n    /**\n     * @type {Array<SourceType>|function(import(\"../extent.js\").Extent, number):Array<SourceType>}\n     * @private\n     */\n    this.sources_ = options.sources;\n\n    /**\n     * @type {SourceType|null}\n     * @private\n     */\n    this.renderedSource_ = null;\n\n    /**\n     * @type {number}\n     * @private\n     */\n    this.renderedResolution_ = NaN;\n\n    /**\n     * @type {Style}\n     * @private\n     */\n    this.style_ = style;\n\n    /**\n     * @type {number}\n     * @private\n     */\n    this.cacheSize_ = cacheSize;\n\n    /**\n     * @type {Object<string, (string|number)>}\n     * @private\n     */\n    this.styleVariables_ = this.style_.variables || {};\n\n    this.addChangeListener(LayerProperty.SOURCE, this.handleSourceUpdate_);\n  }\n\n  /**\n   * Gets the sources for this layer, for a given extent and resolution.\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @param {number} resolution Resolution.\n   * @return {Array<SourceType>} Sources.\n   */\n  getSources(extent, resolution) {\n    const source = this.getSource();\n    return this.sources_\n      ? typeof this.sources_ === 'function'\n        ? this.sources_(extent, resolution)\n        : this.sources_\n      : source\n      ? [source]\n      : [];\n  }\n\n  /**\n   * @return {SourceType} The source being rendered.\n   */\n  getRenderSource() {\n    return this.renderedSource_ || this.getSource();\n  }\n\n  /**\n   * @return {import(\"../source/Source.js\").State} Source state.\n   */\n  getSourceState() {\n    const source = this.getRenderSource();\n    return source ? source.getState() : 'undefined';\n  }\n\n  /**\n   * @private\n   */\n  handleSourceUpdate_() {\n    if (this.hasRenderer()) {\n      this.getRenderer().clearCache();\n    }\n    if (this.getSource()) {\n      this.setStyle(this.style_);\n    }\n  }\n\n  /**\n   * @private\n   * @return {number} The number of source bands.\n   */\n  getSourceBandCount_() {\n    const max = Number.MAX_SAFE_INTEGER;\n    const sources = this.getSources([-max, -max, max, max], max);\n    return sources && sources.length && 'bandCount' in sources[0]\n      ? sources[0].bandCount\n      : 4;\n  }\n\n  createRenderer() {\n    const parsedStyle = parseStyle(this.style_, this.getSourceBandCount_());\n\n    return new WebGLTileLayerRenderer(this, {\n      vertexShader: parsedStyle.vertexShader,\n      fragmentShader: parsedStyle.fragmentShader,\n      uniforms: parsedStyle.uniforms,\n      cacheSize: this.cacheSize_,\n      paletteTextures: parsedStyle.paletteTextures,\n    });\n  }\n\n  /**\n   * @param {import(\"../Map\").FrameState} frameState Frame state.\n   * @param {Array<SourceType>} sources Sources.\n   * @return {HTMLElement} Canvas.\n   */\n  renderSources(frameState, sources) {\n    const layerRenderer = this.getRenderer();\n    let canvas;\n    for (let i = 0, ii = sources.length; i < ii; ++i) {\n      this.renderedSource_ = sources[i];\n      if (layerRenderer.prepareFrame(frameState)) {\n        canvas = layerRenderer.renderFrame(frameState);\n      }\n    }\n    return canvas;\n  }\n\n  /**\n   * @param {?import(\"../Map.js\").FrameState} frameState Frame state.\n   * @param {HTMLElement} target Target which the renderer may (but need not) use\n   * for rendering its content.\n   * @return {HTMLElement} The rendered element.\n   */\n  render(frameState, target) {\n    this.rendered = true;\n    const viewState = frameState.viewState;\n    const sources = this.getSources(frameState.extent, viewState.resolution);\n    let ready = true;\n    for (let i = 0, ii = sources.length; i < ii; ++i) {\n      const source = sources[i];\n      const sourceState = source.getState();\n      if (sourceState == 'loading') {\n        const onChange = () => {\n          if (source.getState() == 'ready') {\n            source.removeEventListener('change', onChange);\n            this.changed();\n          }\n        };\n        source.addEventListener('change', onChange);\n      }\n      ready = ready && sourceState == 'ready';\n    }\n    const canvas = this.renderSources(frameState, sources);\n    if (this.getRenderer().renderComplete && ready) {\n      // Fully rendered, done.\n      this.renderedResolution_ = viewState.resolution;\n      return canvas;\n    }\n    // Render sources from previously fully rendered frames\n    if (this.renderedResolution_ > 0.5 * viewState.resolution) {\n      const altSources = this.getSources(\n        frameState.extent,\n        this.renderedResolution_\n      ).filter((source) => !sources.includes(source));\n      if (altSources.length > 0) {\n        return this.renderSources(frameState, altSources);\n      }\n    }\n    return canvas;\n  }\n\n  /**\n   * Update the layer style.  The `updateStyleVariables` function is a more efficient\n   * way to update layer rendering.  In cases where the whole style needs to be updated,\n   * this method may be called instead.  Note that calling this method will also replace\n   * any previously set variables, so the new style also needs to include new variables,\n   * if needed.\n   * @param {Style} style The new style.\n   */\n  setStyle(style) {\n    this.styleVariables_ = style.variables || {};\n    this.style_ = style;\n    const parsedStyle = parseStyle(this.style_, this.getSourceBandCount_());\n    const renderer = this.getRenderer();\n    renderer.reset({\n      vertexShader: parsedStyle.vertexShader,\n      fragmentShader: parsedStyle.fragmentShader,\n      uniforms: parsedStyle.uniforms,\n    });\n    this.changed();\n  }\n\n  /**\n   * Update any variables used by the layer style and trigger a re-render.\n   * @param {Object<string, number>} variables Variables to update.\n   * @api\n   */\n  updateStyleVariables(variables) {\n    Object.assign(this.styleVariables_, variables);\n    this.changed();\n  }\n}\n\n/**\n * Clean up underlying WebGL resources.\n * @function\n * @api\n */\nWebGLTileLayer.prototype.dispose;\n\nexport default WebGLTileLayer;\n","/**\n * @module ol/interaction/DblClickDragZoom\n */\nimport Interaction from './Interaction.js';\nimport MapBrowserEventType from '../MapBrowserEventType.js';\n\n/**\n * @typedef {Object} Options\n * @property {number} [duration=400] Animation duration in milliseconds. *\n * @property {number} [delta=1] The zoom delta applied on move of one pixel. *\n * @property {function(boolean):boolean} [stopDown]\n * Should the down event be propagated to other interactions, or should be\n * stopped?\n */\n\n/**\n * @classdesc\n * Allows the user to zoom the map by double tap/clik then drag up/down\n * with one finger/left mouse.\n * @api\n */\nclass DblClickDragZoom extends Interaction {\n  /**\n   * @param {Options} [opt_options] Options.\n   */\n  constructor(opt_options) {\n    const options = opt_options ? opt_options : {};\n\n    super(\n      /** @type {import(\"./Interaction.js\").InteractionOptions} */ (options)\n    );\n\n    if (options.stopDown) {\n      this.stopDown = options.stopDown;\n    }\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.scaleDeltaByPixel_ = options.delta ? options.delta : 0.01;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.duration_ = options.duration !== undefined ? options.duration : 250;\n\n    /**\n     * @type {boolean}\n     * @private\n     */\n    this.handlingDownUpSequence_ = false;\n\n    /**\n     * @type {boolean}\n     * @private\n     */\n    this.handlingDoubleDownSequence_ = false;\n\n    /**\n     * @type {!Object<string, PointerEvent>}\n     * @private\n     */\n    this.trackedPointers_ = {};\n\n    /**\n     * @type {Array<PointerEvent>}\n     * @protected\n     */\n    this.targetPointers = [];\n  }\n\n  /**\n   * Handles the {@link module:ol/MapBrowserEvent~MapBrowserEvent  map browser event} and may call into\n   * other functions, if event sequences like e.g. 'drag' or 'down-up' etc. are\n   * detected.\n   * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n   * @return {boolean} `false` to stop event propagation.\n   * @api\n   */\n  handleEvent(mapBrowserEvent) {\n    if (!mapBrowserEvent.originalEvent) {\n      return true;\n    }\n\n    let stopEvent = false;\n    this.updateTrackedPointers_(mapBrowserEvent);\n    if (this.handlingDownUpSequence_) {\n      if (mapBrowserEvent.type == MapBrowserEventType.POINTERDRAG) {\n        this.handleDragEvent(mapBrowserEvent);\n        // prevent page scrolling during dragging\n        mapBrowserEvent.originalEvent.preventDefault();\n      } else if (mapBrowserEvent.type == MapBrowserEventType.POINTERUP) {\n        const handledUp = this.handleUpEvent(mapBrowserEvent);\n        this.handlingDownUpSequence_ = handledUp;\n      }\n    } else {\n      if (mapBrowserEvent.type == MapBrowserEventType.POINTERDOWN) {\n        if (this.handlingDoubleDownSequence_) {\n          this.handlingDoubleDownSequence_ = false;\n          const handled = this.handleDownEvent(mapBrowserEvent);\n          this.handlingDownUpSequence_ = handled;\n          stopEvent = this.stopDown(handled);\n        } else {\n          stopEvent = this.stopDown(false);\n          this.waitForDblTap();\n        }\n      }\n    }\n    return !stopEvent;\n  }\n\n  /**\n   * Handle pointer drag events.\n   * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Event.\n   */\n  handleDragEvent(mapBrowserEvent) {\n    let scaleDelta = 1.0;\n\n    const touch0 = this.targetPointers[0];\n    const touch1 = this.down_.originalEvent;\n    const distance = touch0.clientY - touch1.clientY;\n\n    if (this.lastDistance_ !== undefined) {\n      scaleDelta =\n        1 - (this.lastDistance_ - distance) * this.scaleDeltaByPixel_;\n    }\n    this.lastDistance_ = distance;\n\n    if (scaleDelta != 1.0) {\n      this.lastScaleDelta_ = scaleDelta;\n    }\n\n    // scale, bypass the resolution constraint\n    const map = mapBrowserEvent.map;\n    const view = map.getView();\n    map.render();\n    view.adjustResolutionInternal(scaleDelta);\n  }\n\n  /**\n   * Handle pointer down events.\n   * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Event.\n   * @return {boolean} If the event was consumed.\n   */\n  handleDownEvent(mapBrowserEvent) {\n    if (this.targetPointers.length == 1) {\n      const map = mapBrowserEvent.map;\n      this.anchor_ = null;\n      this.lastDistance_ = undefined;\n      this.lastScaleDelta_ = 1;\n      this.down_ = mapBrowserEvent;\n      if (!this.handlingDownUpSequence_) {\n        map.getView().beginInteraction();\n      }\n      return true;\n    }\n    return false;\n  }\n\n  /**\n   * Handle pointer up events zooming out.\n   * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Event.\n   * @return {boolean} If the event was consumed.\n   */\n  handleUpEvent(mapBrowserEvent) {\n    if (this.targetPointers.length == 0) {\n      const map = mapBrowserEvent.map;\n      const view = map.getView();\n      const direction = this.lastScaleDelta_ > 1 ? 1 : -1;\n      view.endInteraction(this.duration_, direction);\n      this.handlingDownUpSequence_ = false;\n      this.handlingDoubleDownSequence_ = false;\n      return false;\n    }\n    return true;\n  }\n\n  /**\n   * This function is used to determine if \"down\" events should be propagated\n   * to other interactions or should be stopped.\n   * @param {boolean} handled Was the event handled by the interaction?\n   * @return {boolean} Should the `down` event be stopped?\n   */\n  stopDown(handled) {\n    return handled;\n  }\n\n  /**\n   * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Event.\n   * @private\n   */\n  updateTrackedPointers_(mapBrowserEvent) {\n    if (isPointerDraggingEvent(mapBrowserEvent)) {\n      const event = mapBrowserEvent.originalEvent;\n\n      const id = event.pointerId.toString();\n      if (mapBrowserEvent.type == MapBrowserEventType.POINTERUP) {\n        delete this.trackedPointers_[id];\n      } else if (mapBrowserEvent.type == MapBrowserEventType.POINTERDOWN) {\n        this.trackedPointers_[id] = event;\n      } else if (id in this.trackedPointers_) {\n        // update only when there was a pointerdown event for this pointer\n        this.trackedPointers_[id] = event;\n      }\n      this.targetPointers = Object.values(this.trackedPointers_);\n    }\n  }\n\n  /**\n   * Wait the second double finger tap.\n   */\n  waitForDblTap() {\n    if (this.doubleTapTimeoutId_ !== undefined) {\n      // double-click\n      clearTimeout(this.doubleTapTimeoutId_);\n      this.doubleTapTimeoutId_ = undefined;\n    } else {\n      this.handlingDoubleDownSequence_ = true;\n      this.doubleTapTimeoutId_ = setTimeout(\n        this.endInteraction.bind(this),\n        250\n      );\n    }\n  }\n\n  /**\n   * @private\n   */\n  endInteraction() {\n    this.handlingDoubleDownSequence_ = false;\n    this.doubleTapTimeoutId_ = undefined;\n  }\n}\n\n/**\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Event.\n * @return {boolean} Whether the event is a pointerdown, pointerdrag\n *     or pointerup event.\n */\nfunction isPointerDraggingEvent(mapBrowserEvent) {\n  const type = mapBrowserEvent.type;\n  return (\n    type === MapBrowserEventType.POINTERDOWN ||\n    type === MapBrowserEventType.POINTERDRAG ||\n    type === MapBrowserEventType.POINTERUP\n  );\n}\n\nexport default DblClickDragZoom;\n","/**\n * @module ol/interaction/DragAndDrop\n */\n// FIXME should handle all geo-referenced data, not just vector data\n\nimport Event from '../events/Event.js';\nimport EventType from '../events/EventType.js';\nimport Interaction from './Interaction.js';\nimport {TRUE} from '../functions.js';\nimport {get as getProjection, getUserProjection} from '../proj.js';\nimport {listen, unlistenByKey} from '../events.js';\n\n/**\n * @typedef {Object} Options\n * @property {Array<typeof import(\"../format/Feature.js\").default|import(\"../format/Feature.js\").default>} [formatConstructors] Format constructors\n * (and/or formats pre-constructed with options).\n * @property {import(\"../source/Vector.js\").default} [source] Optional vector source where features will be added.  If a source is provided\n * all existing features will be removed and new features will be added when\n * they are dropped on the target.  If you want to add features to a vector\n * source without removing the existing features (append only), instead of\n * providing the source option listen for the \"addfeatures\" event.\n * @property {import(\"../proj.js\").ProjectionLike} [projection] Target projection. By default, the map's view's projection is used.\n * @property {HTMLElement} [target] The element that is used as the drop target, default is the viewport element.\n */\n\n/**\n * @enum {string}\n */\nconst DragAndDropEventType = {\n  /**\n   * Triggered when features are added\n   * @event DragAndDropEvent#addfeatures\n   * @api\n   */\n  ADD_FEATURES: 'addfeatures',\n};\n\n/**\n * @classdesc\n * Events emitted by {@link module:ol/interaction/DragAndDrop~DragAndDrop} instances are instances\n * of this type.\n */\nexport class DragAndDropEvent extends Event {\n  /**\n   * @param {DragAndDropEventType} type Type.\n   * @param {File} file File.\n   * @param {Array<import(\"../Feature.js\").default>} [features] Features.\n   * @param {import(\"../proj/Projection.js\").default} [projection] Projection.\n   */\n  constructor(type, file, features, projection) {\n    super(type);\n\n    /**\n     * The features parsed from dropped data.\n     * @type {Array<import(\"../Feature.js\").FeatureLike>|undefined}\n     * @api\n     */\n    this.features = features;\n\n    /**\n     * The dropped file.\n     * @type {File}\n     * @api\n     */\n    this.file = file;\n\n    /**\n     * The feature projection.\n     * @type {import(\"../proj/Projection.js\").default|undefined}\n     * @api\n     */\n    this.projection = projection;\n  }\n}\n\n/***\n * @template Return\n * @typedef {import(\"../Observable\").OnSignature<import(\"../Observable\").EventTypes, import(\"../events/Event.js\").default, Return> &\n *   import(\"../Observable\").OnSignature<import(\"../ObjectEventType\").Types|\n *     'change:active', import(\"../Object\").ObjectEvent, Return> &\n *   import(\"../Observable\").OnSignature<'addfeatures', DragAndDropEvent, Return> &\n *   import(\"../Observable\").CombinedOnSignature<import(\"../Observable\").EventTypes|import(\"../ObjectEventType\").Types|\n *     'change:active'|'addfeatures', Return>} DragAndDropOnSignature\n */\n\n/**\n * @classdesc\n * Handles input of vector data by drag and drop.\n *\n * @api\n *\n * @fires DragAndDropEvent\n */\nclass DragAndDrop extends Interaction {\n  /**\n   * @param {Options} [options] Options.\n   */\n  constructor(options) {\n    options = options ? options : {};\n\n    super({\n      handleEvent: TRUE,\n    });\n\n    /***\n     * @type {DragAndDropOnSignature<import(\"../events\").EventsKey>}\n     */\n    this.on;\n\n    /***\n     * @type {DragAndDropOnSignature<import(\"../events\").EventsKey>}\n     */\n    this.once;\n\n    /***\n     * @type {DragAndDropOnSignature<void>}\n     */\n    this.un;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.readAsBuffer_ = false;\n\n    /**\n     * @private\n     * @type {Array<import(\"../format/Feature.js\").default>}\n     */\n    this.formats_ = [];\n    const formatConstructors = options.formatConstructors\n      ? options.formatConstructors\n      : [];\n    for (let i = 0, ii = formatConstructors.length; i < ii; ++i) {\n      let format = formatConstructors[i];\n      if (typeof format === 'function') {\n        format = new format();\n      }\n      this.formats_.push(format);\n      this.readAsBuffer_ =\n        this.readAsBuffer_ || format.getType() === 'arraybuffer';\n    }\n\n    /**\n     * @private\n     * @type {import(\"../proj/Projection.js\").default}\n     */\n    this.projection_ = options.projection\n      ? getProjection(options.projection)\n      : null;\n\n    /**\n     * @private\n     * @type {?Array<import(\"../events.js\").EventsKey>}\n     */\n    this.dropListenKeys_ = null;\n\n    /**\n     * @private\n     * @type {import(\"../source/Vector.js\").default}\n     */\n    this.source_ = options.source || null;\n\n    /**\n     * @private\n     * @type {HTMLElement|null}\n     */\n    this.target = options.target ? options.target : null;\n  }\n\n  /**\n   * @param {File} file File.\n   * @param {Event} event Load event.\n   * @private\n   */\n  handleResult_(file, event) {\n    const result = event.target.result;\n    const map = this.getMap();\n    let projection = this.projection_;\n    if (!projection) {\n      projection = getUserProjection();\n      if (!projection) {\n        const view = map.getView();\n        projection = view.getProjection();\n      }\n    }\n\n    let text;\n    const formats = this.formats_;\n    for (let i = 0, ii = formats.length; i < ii; ++i) {\n      const format = formats[i];\n      let input = result;\n      if (this.readAsBuffer_ && format.getType() !== 'arraybuffer') {\n        if (text === undefined) {\n          text = new TextDecoder().decode(result);\n        }\n        input = text;\n      }\n      const features = this.tryReadFeatures_(format, input, {\n        featureProjection: projection,\n      });\n      if (features && features.length > 0) {\n        if (this.source_) {\n          this.source_.clear();\n          this.source_.addFeatures(features);\n        }\n        this.dispatchEvent(\n          new DragAndDropEvent(\n            DragAndDropEventType.ADD_FEATURES,\n            file,\n            features,\n            projection\n          )\n        );\n        break;\n      }\n    }\n  }\n\n  /**\n   * @private\n   */\n  registerListeners_() {\n    const map = this.getMap();\n    if (map) {\n      const dropArea = this.target ? this.target : map.getViewport();\n      this.dropListenKeys_ = [\n        listen(dropArea, EventType.DROP, this.handleDrop, this),\n        listen(dropArea, EventType.DRAGENTER, this.handleStop, this),\n        listen(dropArea, EventType.DRAGOVER, this.handleStop, this),\n        listen(dropArea, EventType.DROP, this.handleStop, this),\n      ];\n    }\n  }\n\n  /**\n   * Activate or deactivate the interaction.\n   * @param {boolean} active Active.\n   * @observable\n   * @api\n   */\n  setActive(active) {\n    if (!this.getActive() && active) {\n      this.registerListeners_();\n    }\n    if (this.getActive() && !active) {\n      this.unregisterListeners_();\n    }\n    super.setActive(active);\n  }\n\n  /**\n   * Remove the interaction from its current map and attach it to the new map.\n   * Subclasses may set up event handlers to get notified about changes to\n   * the map here.\n   * @param {import(\"../Map.js\").default} map Map.\n   */\n  setMap(map) {\n    this.unregisterListeners_();\n    super.setMap(map);\n    if (this.getActive()) {\n      this.registerListeners_();\n    }\n  }\n\n  /**\n   * @param {import(\"../format/Feature.js\").default} format Format.\n   * @param {string} text Text.\n   * @param {import(\"../format/Feature.js\").ReadOptions} options Read options.\n   * @private\n   * @return {Array<import(\"../Feature.js\").default>} Features.\n   */\n  tryReadFeatures_(format, text, options) {\n    try {\n      return (\n        /** @type {Array<import(\"../Feature.js\").default>} */\n        (format.readFeatures(text, options))\n      );\n    } catch (e) {\n      return null;\n    }\n  }\n\n  /**\n   * @private\n   */\n  unregisterListeners_() {\n    if (this.dropListenKeys_) {\n      this.dropListenKeys_.forEach(unlistenByKey);\n      this.dropListenKeys_ = null;\n    }\n  }\n\n  /**\n   * @param {DragEvent} event Event.\n   */\n  handleDrop(event) {\n    const files = event.dataTransfer.files;\n    for (let i = 0, ii = files.length; i < ii; ++i) {\n      const file = files.item(i);\n      const reader = new FileReader();\n      reader.addEventListener(\n        EventType.LOAD,\n        this.handleResult_.bind(this, file)\n      );\n      if (this.readAsBuffer_) {\n        reader.readAsArrayBuffer(file);\n      } else {\n        reader.readAsText(file);\n      }\n    }\n  }\n\n  /**\n   * @param {DragEvent} event Event.\n   */\n  handleStop(event) {\n    event.stopPropagation();\n    event.preventDefault();\n    event.dataTransfer.dropEffect = 'copy';\n  }\n}\n\nexport default DragAndDrop;\n","/**\n * @module ol/interaction/DragRotateAndZoom\n */\nimport PointerInteraction from './Pointer.js';\nimport {mouseOnly, shiftKeyOnly} from '../events/condition.js';\n\n/**\n * @typedef {Object} Options\n * @property {import(\"../events/condition.js\").Condition} [condition] A function that\n * takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a\n * boolean to indicate whether that event should be handled.\n * Default is {@link module:ol/events/condition.shiftKeyOnly}.\n * @property {number} [duration=400] Animation duration in milliseconds.\n */\n\n/**\n * @classdesc\n * Allows the user to zoom and rotate the map by clicking and dragging\n * on the map.  By default, this interaction is limited to when the shift\n * key is held down.\n *\n * This interaction is only supported for mouse devices.\n *\n * And this interaction is not included in the default interactions.\n * @api\n */\nclass DragRotateAndZoom extends PointerInteraction {\n  /**\n   * @param {Options} [options] Options.\n   */\n  constructor(options) {\n    options = options ? options : {};\n\n    super(/** @type {import(\"./Pointer.js\").Options} */ (options));\n\n    /**\n     * @private\n     * @type {import(\"../events/condition.js\").Condition}\n     */\n    this.condition_ = options.condition ? options.condition : shiftKeyOnly;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.lastAngle_ = undefined;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.lastMagnitude_ = undefined;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.lastScaleDelta_ = 0;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.duration_ = options.duration !== undefined ? options.duration : 400;\n  }\n\n  /**\n   * Handle pointer drag events.\n   * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Event.\n   */\n  handleDragEvent(mapBrowserEvent) {\n    if (!mouseOnly(mapBrowserEvent)) {\n      return;\n    }\n\n    const map = mapBrowserEvent.map;\n    const size = map.getSize();\n    const offset = mapBrowserEvent.pixel;\n    const deltaX = offset[0] - size[0] / 2;\n    const deltaY = size[1] / 2 - offset[1];\n    const theta = Math.atan2(deltaY, deltaX);\n    const magnitude = Math.sqrt(deltaX * deltaX + deltaY * deltaY);\n    const view = map.getView();\n    if (this.lastAngle_ !== undefined) {\n      const angleDelta = this.lastAngle_ - theta;\n      view.adjustRotationInternal(angleDelta);\n    }\n    this.lastAngle_ = theta;\n    if (this.lastMagnitude_ !== undefined) {\n      view.adjustResolutionInternal(this.lastMagnitude_ / magnitude);\n    }\n    if (this.lastMagnitude_ !== undefined) {\n      this.lastScaleDelta_ = this.lastMagnitude_ / magnitude;\n    }\n    this.lastMagnitude_ = magnitude;\n  }\n\n  /**\n   * Handle pointer up events.\n   * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Event.\n   * @return {boolean} If the event was consumed.\n   */\n  handleUpEvent(mapBrowserEvent) {\n    if (!mouseOnly(mapBrowserEvent)) {\n      return true;\n    }\n\n    const map = mapBrowserEvent.map;\n    const view = map.getView();\n    const direction = this.lastScaleDelta_ > 1 ? 1 : -1;\n    view.endInteraction(this.duration_, direction);\n    this.lastScaleDelta_ = 0;\n    return false;\n  }\n\n  /**\n   * Handle pointer down events.\n   * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Event.\n   * @return {boolean} If the event was consumed.\n   */\n  handleDownEvent(mapBrowserEvent) {\n    if (!mouseOnly(mapBrowserEvent)) {\n      return false;\n    }\n\n    if (this.condition_(mapBrowserEvent)) {\n      mapBrowserEvent.map.getView().beginInteraction();\n      this.lastAngle_ = undefined;\n      this.lastMagnitude_ = undefined;\n      return true;\n    }\n    return false;\n  }\n}\n\nexport default DragRotateAndZoom;\n","/**\n * @module ol/interaction/Draw\n */\nimport Circle from '../geom/Circle.js';\nimport Event from '../events/Event.js';\nimport EventType from '../events/EventType.js';\nimport Feature from '../Feature.js';\nimport GeometryCollection from '../geom/GeometryCollection.js';\nimport InteractionProperty from './Property.js';\nimport LineString from '../geom/LineString.js';\nimport MapBrowserEvent from '../MapBrowserEvent.js';\nimport MapBrowserEventType from '../MapBrowserEventType.js';\nimport MultiLineString from '../geom/MultiLineString.js';\nimport MultiPoint from '../geom/MultiPoint.js';\nimport MultiPolygon from '../geom/MultiPolygon.js';\nimport Point from '../geom/Point.js';\nimport PointerInteraction from './Pointer.js';\nimport Polygon, {fromCircle, makeRegular} from '../geom/Polygon.js';\nimport VectorLayer from '../layer/Vector.js';\nimport VectorSource from '../source/Vector.js';\nimport {FALSE, TRUE} from '../functions.js';\nimport {\n  always,\n  never,\n  noModifierKeys,\n  shiftKeyOnly,\n} from '../events/condition.js';\nimport {\n  boundingExtent,\n  getBottomLeft,\n  getBottomRight,\n  getTopLeft,\n  getTopRight,\n} from '../extent.js';\nimport {clamp, squaredDistance, toFixed} from '../math.js';\nimport {createEditingStyle} from '../style/Style.js';\nimport {\n  distance,\n  squaredDistance as squaredCoordinateDistance,\n} from '../coordinate.js';\nimport {fromUserCoordinate, getUserProjection} from '../proj.js';\nimport {getStrideForLayout} from '../geom/SimpleGeometry.js';\n\n/**\n * @typedef {Object} Options\n * @property {import(\"../geom/Geometry.js\").Type} type Geometry type of\n * the geometries being drawn with this instance.\n * @property {number} [clickTolerance=6] The maximum distance in pixels between\n * \"down\" and \"up\" for a \"up\" event to be considered a \"click\" event and\n * actually add a point/vertex to the geometry being drawn.  The default of `6`\n * was chosen for the draw interaction to behave correctly on mouse as well as\n * on touch devices.\n * @property {import(\"../Collection.js\").default<Feature>} [features]\n * Destination collection for the drawn features.\n * @property {VectorSource} [source] Destination source for\n * the drawn features.\n * @property {number} [dragVertexDelay=500] Delay in milliseconds after pointerdown\n * before the current vertex can be dragged to its exact position.\n * @property {number} [snapTolerance=12] Pixel distance for snapping to the\n * drawing finish. Must be greater than `0`.\n * @property {boolean} [stopClick=false] Stop click, singleclick, and\n * doubleclick events from firing during drawing.\n * @property {number} [maxPoints] The number of points that can be drawn before\n * a polygon ring or line string is finished. By default there is no\n * restriction.\n * @property {number} [minPoints] The number of points that must be drawn\n * before a polygon ring or line string can be finished. Default is `3` for\n * polygon rings and `2` for line strings.\n * @property {import(\"../events/condition.js\").Condition} [finishCondition] A function\n * that takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a\n * boolean to indicate whether the drawing can be finished. Not used when drawing\n * POINT or MULTI_POINT geometries.\n * @property {import(\"../style/Style.js\").StyleLike|import(\"../style/flat.js\").FlatStyleLike} [style]\n * Style for sketch features.\n * @property {GeometryFunction} [geometryFunction]\n * Function that is called when a geometry's coordinates are updated.\n * @property {string} [geometryName] Geometry name to use for features created\n * by the draw interaction.\n * @property {import(\"../events/condition.js\").Condition} [condition] A function that\n * takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a\n * boolean to indicate whether that event should be handled.\n * By default {@link module:ol/events/condition.noModifierKeys}, i.e. a click,\n * adds a vertex or deactivates freehand drawing.\n * @property {boolean} [freehand=false] Operate in freehand mode for lines,\n * polygons, and circles.  This makes the interaction always operate in freehand\n * mode and takes precedence over any `freehandCondition` option.\n * @property {import(\"../events/condition.js\").Condition} [freehandCondition]\n * Condition that activates freehand drawing for lines and polygons. This\n * function takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and\n * returns a boolean to indicate whether that event should be handled. The\n * default is {@link module:ol/events/condition.shiftKeyOnly}, meaning that the\n * Shift key activates freehand drawing.\n * @property {boolean|import(\"../events/condition.js\").Condition} [trace=false] Trace a portion of another geometry.\n * Ignored when in freehand mode.\n * @property {VectorSource} [traceSource] Source for features to trace.  If tracing is active and a `traceSource` is\n * not provided, the interaction's `source` will be used.  Tracing requires that the interaction is configured with\n * either a `traceSource` or a `source`.\n * @property {boolean} [wrapX=false] Wrap the world horizontally on the sketch\n * overlay.\n * @property {import(\"../geom/Geometry.js\").GeometryLayout} [geometryLayout='XY'] Layout of the\n * feature geometries created by the draw interaction.\n */\n\n/**\n * Coordinate type when drawing points.\n * @typedef {import(\"../coordinate.js\").Coordinate} PointCoordType\n */\n\n/**\n * Coordinate type when drawing lines.\n * @typedef {Array<import(\"../coordinate.js\").Coordinate>} LineCoordType\n */\n\n/**\n * Coordinate type when drawing polygons.\n * @typedef {Array<Array<import(\"../coordinate.js\").Coordinate>>} PolyCoordType\n */\n\n/**\n * Types used for drawing coordinates.\n * @typedef {PointCoordType|LineCoordType|PolyCoordType} SketchCoordType\n */\n\n/**\n * @typedef {Object} TraceState\n * @property {boolean} active Tracing active.\n * @property {import(\"../pixel.js\").Pixel} [startPx] The initially clicked pixel location.\n * @property {Array<TraceTarget>} [targets] Targets available for tracing.\n * @property {number} [targetIndex] The index of the currently traced target.  A value of -1 indicates\n * that no trace target is active.\n */\n\n/**\n * @typedef {Object} TraceTarget\n * @property {Array<import(\"../coordinate.js\").Coordinate>} coordinates Target coordinates.\n * @property {boolean} ring The target coordinates are a linear ring.\n * @property {number} startIndex The index of first traced coordinate.  A fractional index represents an\n * edge intersection.  Index values for rings will wrap (may be negative or larger than coordinates length).\n * @property {number} endIndex The index of last traced coordinate.  Details from startIndex also apply here.\n */\n\n/**\n * Function that takes an array of coordinates and an optional existing geometry\n * and a projection as arguments, and returns a geometry. The optional existing\n * geometry is the geometry that is returned when the function is called without\n * a second argument.\n * @typedef {function(!SketchCoordType, import(\"../geom/SimpleGeometry.js\").default,\n *     import(\"../proj/Projection.js\").default):\n *     import(\"../geom/SimpleGeometry.js\").default} GeometryFunction\n */\n\n/**\n * @typedef {'Point' | 'LineString' | 'Polygon' | 'Circle'} Mode\n * Draw mode.  This collapses multi-part geometry types with their single-part\n * cousins.\n */\n\n/**\n * @enum {string}\n */\nconst DrawEventType = {\n  /**\n   * Triggered upon feature draw start\n   * @event DrawEvent#drawstart\n   * @api\n   */\n  DRAWSTART: 'drawstart',\n  /**\n   * Triggered upon feature draw end\n   * @event DrawEvent#drawend\n   * @api\n   */\n  DRAWEND: 'drawend',\n  /**\n   * Triggered upon feature draw abortion\n   * @event DrawEvent#drawabort\n   * @api\n   */\n  DRAWABORT: 'drawabort',\n};\n\n/**\n * @classdesc\n * Events emitted by {@link module:ol/interaction/Draw~Draw} instances are\n * instances of this type.\n */\nexport class DrawEvent extends Event {\n  /**\n   * @param {DrawEventType} type Type.\n   * @param {Feature} feature The feature drawn.\n   */\n  constructor(type, feature) {\n    super(type);\n\n    /**\n     * The feature being drawn.\n     * @type {Feature}\n     * @api\n     */\n    this.feature = feature;\n  }\n}\n\n/**\n * @param {import(\"../coordinate.js\").Coordinate} coordinate The coordinate.\n * @param {Array<Feature>} features The candidate features.\n * @return {Array<TraceTarget>} The trace targets.\n */\nfunction getTraceTargets(coordinate, features) {\n  /**\n   * @type {Array<TraceTarget>}\n   */\n  const targets = [];\n\n  for (let i = 0; i < features.length; ++i) {\n    const feature = features[i];\n    const geometry = feature.getGeometry();\n    appendGeometryTraceTargets(coordinate, geometry, targets);\n  }\n\n  return targets;\n}\n\n/**\n * @param {import(\"../coordinate.js\").Coordinate} a One coordinate.\n * @param {import(\"../coordinate.js\").Coordinate} b Another coordinate.\n * @return {number} The squared distance between the two coordinates.\n */\nfunction getSquaredDistance(a, b) {\n  return squaredDistance(a[0], a[1], b[0], b[1]);\n}\n\n/**\n * @param {LineCoordType} coordinates The ring coordinates.\n * @param {number} index The index.  May be wrapped.\n * @return {import(\"../coordinate.js\").Coordinate} The coordinate.\n */\nfunction getCoordinate(coordinates, index) {\n  const count = coordinates.length;\n  if (index < 0) {\n    return coordinates[index + count];\n  }\n  if (index >= count) {\n    return coordinates[index - count];\n  }\n  return coordinates[index];\n}\n\n/**\n * Get the cumulative squared distance along a ring path.  The end index index may be \"wrapped\" and it may\n * be less than the start index to indicate the direction of travel.  The start and end index may have\n * a fractional part to indicate a point between two coordinates.\n * @param {LineCoordType} coordinates Ring coordinates.\n * @param {number} startIndex The start index.\n * @param {number} endIndex The end index.\n * @return {number} The cumulative squared distance along the ring path.\n */\nfunction getCumulativeSquaredDistance(coordinates, startIndex, endIndex) {\n  let lowIndex, highIndex;\n  if (startIndex < endIndex) {\n    lowIndex = startIndex;\n    highIndex = endIndex;\n  } else {\n    lowIndex = endIndex;\n    highIndex = startIndex;\n  }\n  const lowWholeIndex = Math.ceil(lowIndex);\n  const highWholeIndex = Math.floor(highIndex);\n\n  if (lowWholeIndex > highWholeIndex) {\n    // both start and end are on the same segment\n    const start = interpolateCoordinate(coordinates, lowIndex);\n    const end = interpolateCoordinate(coordinates, highIndex);\n    return getSquaredDistance(start, end);\n  }\n\n  let sd = 0;\n\n  if (lowIndex < lowWholeIndex) {\n    const start = interpolateCoordinate(coordinates, lowIndex);\n    const end = getCoordinate(coordinates, lowWholeIndex);\n    sd += getSquaredDistance(start, end);\n  }\n\n  if (highWholeIndex < highIndex) {\n    const start = getCoordinate(coordinates, highWholeIndex);\n    const end = interpolateCoordinate(coordinates, highIndex);\n    sd += getSquaredDistance(start, end);\n  }\n\n  for (let i = lowWholeIndex; i < highWholeIndex - 1; ++i) {\n    const start = getCoordinate(coordinates, i);\n    const end = getCoordinate(coordinates, i + 1);\n    sd += getSquaredDistance(start, end);\n  }\n\n  return sd;\n}\n\n/**\n * @param {import(\"../coordinate.js\").Coordinate} coordinate The coordinate.\n * @param {import(\"../geom/Geometry.js\").default} geometry The candidate geometry.\n * @param {Array<TraceTarget>} targets The trace targets.\n */\nfunction appendGeometryTraceTargets(coordinate, geometry, targets) {\n  if (geometry instanceof LineString) {\n    appendTraceTarget(coordinate, geometry.getCoordinates(), false, targets);\n    return;\n  }\n  if (geometry instanceof MultiLineString) {\n    const coordinates = geometry.getCoordinates();\n    for (let i = 0, ii = coordinates.length; i < ii; ++i) {\n      appendTraceTarget(coordinate, coordinates[i], false, targets);\n    }\n    return;\n  }\n  if (geometry instanceof Polygon) {\n    const coordinates = geometry.getCoordinates();\n    for (let i = 0, ii = coordinates.length; i < ii; ++i) {\n      appendTraceTarget(coordinate, coordinates[i], true, targets);\n    }\n    return;\n  }\n  if (geometry instanceof MultiPolygon) {\n    const polys = geometry.getCoordinates();\n    for (let i = 0, ii = polys.length; i < ii; ++i) {\n      const coordinates = polys[i];\n      for (let j = 0, jj = coordinates.length; j < jj; ++j) {\n        appendTraceTarget(coordinate, coordinates[j], true, targets);\n      }\n    }\n    return;\n  }\n  if (geometry instanceof GeometryCollection) {\n    const geometries = geometry.getGeometries();\n    for (let i = 0; i < geometries.length; ++i) {\n      appendGeometryTraceTargets(coordinate, geometries[i], targets);\n    }\n    return;\n  }\n  // other types cannot be traced\n}\n\n/**\n * @typedef {Object} TraceTargetUpdateInfo\n * @property {number} index The new target index.\n * @property {number} endIndex The new segment end index.\n */\n\n/**\n * @type {TraceTargetUpdateInfo}\n */\nconst sharedUpdateInfo = {index: -1, endIndex: NaN};\n\n/**\n * @param {import(\"../coordinate.js\").Coordinate} coordinate The coordinate.\n * @param {TraceState} traceState The trace state.\n * @param {import(\"../Map.js\").default} map The map.\n * @param {number} snapTolerance The snap tolerance.\n * @return {TraceTargetUpdateInfo} Information about the new trace target.  The returned\n * object is reused between calls and must not be modified by the caller.\n */\nfunction getTraceTargetUpdate(coordinate, traceState, map, snapTolerance) {\n  const x = coordinate[0];\n  const y = coordinate[1];\n\n  let closestTargetDistance = Infinity;\n\n  let newTargetIndex = -1;\n  let newEndIndex = NaN;\n\n  for (\n    let targetIndex = 0;\n    targetIndex < traceState.targets.length;\n    ++targetIndex\n  ) {\n    const target = traceState.targets[targetIndex];\n    const coordinates = target.coordinates;\n\n    let minSegmentDistance = Infinity;\n    let endIndex;\n    for (\n      let coordinateIndex = 0;\n      coordinateIndex < coordinates.length - 1;\n      ++coordinateIndex\n    ) {\n      const start = coordinates[coordinateIndex];\n      const end = coordinates[coordinateIndex + 1];\n      const rel = getPointSegmentRelationship(x, y, start, end);\n      if (rel.squaredDistance < minSegmentDistance) {\n        minSegmentDistance = rel.squaredDistance;\n        endIndex = coordinateIndex + rel.along;\n      }\n    }\n\n    if (minSegmentDistance < closestTargetDistance) {\n      closestTargetDistance = minSegmentDistance;\n      if (target.ring && traceState.targetIndex === targetIndex) {\n        // same target, maintain the same trace direction\n        if (target.endIndex > target.startIndex) {\n          // forward trace\n          if (endIndex < target.startIndex) {\n            endIndex += coordinates.length;\n          }\n        } else if (target.endIndex < target.startIndex) {\n          // reverse trace\n          if (endIndex > target.startIndex) {\n            endIndex -= coordinates.length;\n          }\n        }\n      }\n      newEndIndex = endIndex;\n      newTargetIndex = targetIndex;\n    }\n  }\n\n  const newTarget = traceState.targets[newTargetIndex];\n  let considerBothDirections = newTarget.ring;\n  if (traceState.targetIndex === newTargetIndex && considerBothDirections) {\n    // only consider switching trace direction if close to the start\n    const newCoordinate = interpolateCoordinate(\n      newTarget.coordinates,\n      newEndIndex\n    );\n    const pixel = map.getPixelFromCoordinate(newCoordinate);\n    if (distance(pixel, traceState.startPx) > snapTolerance) {\n      considerBothDirections = false;\n    }\n  }\n\n  if (considerBothDirections) {\n    const coordinates = newTarget.coordinates;\n    const count = coordinates.length;\n    const startIndex = newTarget.startIndex;\n    const endIndex = newEndIndex;\n    if (startIndex < endIndex) {\n      const forwardDistance = getCumulativeSquaredDistance(\n        coordinates,\n        startIndex,\n        endIndex\n      );\n      const reverseDistance = getCumulativeSquaredDistance(\n        coordinates,\n        startIndex,\n        endIndex - count\n      );\n      if (reverseDistance < forwardDistance) {\n        newEndIndex -= count;\n      }\n    } else {\n      const reverseDistance = getCumulativeSquaredDistance(\n        coordinates,\n        startIndex,\n        endIndex\n      );\n      const forwardDistance = getCumulativeSquaredDistance(\n        coordinates,\n        startIndex,\n        endIndex + count\n      );\n      if (forwardDistance < reverseDistance) {\n        newEndIndex += count;\n      }\n    }\n  }\n\n  sharedUpdateInfo.index = newTargetIndex;\n  sharedUpdateInfo.endIndex = newEndIndex;\n  return sharedUpdateInfo;\n}\n\n/**\n * @param {import(\"../coordinate.js\").Coordinate} coordinate The clicked coordinate.\n * @param {Array<import(\"../coordinate.js\").Coordinate>} coordinates The geometry component coordinates.\n * @param {boolean} ring The coordinates represent a linear ring.\n * @param {Array<TraceTarget>} targets The trace targets.\n */\nfunction appendTraceTarget(coordinate, coordinates, ring, targets) {\n  const x = coordinate[0];\n  const y = coordinate[1];\n  for (let i = 0, ii = coordinates.length - 1; i < ii; ++i) {\n    const start = coordinates[i];\n    const end = coordinates[i + 1];\n    const rel = getPointSegmentRelationship(x, y, start, end);\n    if (rel.squaredDistance === 0) {\n      const index = i + rel.along;\n      targets.push({\n        coordinates: coordinates,\n        ring: ring,\n        startIndex: index,\n        endIndex: index,\n      });\n      return;\n    }\n  }\n}\n\n/**\n * @typedef {Object} PointSegmentRelationship\n * @property {number} along The closest point expressed as a fraction along the segment length.\n * @property {number} squaredDistance The squared distance of the point to the segment.\n */\n\n/**\n * @type {PointSegmentRelationship}\n */\nconst sharedRel = {along: 0, squaredDistance: 0};\n\n/**\n * @param {number} x The point x.\n * @param {number} y The point y.\n * @param {import(\"../coordinate.js\").Coordinate} start The segment start.\n * @param {import(\"../coordinate.js\").Coordinate} end The segment end.\n * @return {PointSegmentRelationship} The point segment relationship.  The returned object is\n * shared between calls and must not be modified by the caller.\n */\nfunction getPointSegmentRelationship(x, y, start, end) {\n  const x1 = start[0];\n  const y1 = start[1];\n  const x2 = end[0];\n  const y2 = end[1];\n  const dx = x2 - x1;\n  const dy = y2 - y1;\n  let along = 0;\n  let px = x1;\n  let py = y1;\n  if (dx !== 0 || dy !== 0) {\n    along = clamp(((x - x1) * dx + (y - y1) * dy) / (dx * dx + dy * dy), 0, 1);\n    px += dx * along;\n    py += dy * along;\n  }\n\n  sharedRel.along = along;\n  sharedRel.squaredDistance = toFixed(squaredDistance(x, y, px, py), 10);\n  return sharedRel;\n}\n\n/**\n * @param {LineCoordType} coordinates The coordinates.\n * @param {number} index The index.  May be fractional and may wrap.\n * @return {import(\"../coordinate.js\").Coordinate} The interpolated coordinate.\n */\nfunction interpolateCoordinate(coordinates, index) {\n  const count = coordinates.length;\n\n  let startIndex = Math.floor(index);\n  const along = index - startIndex;\n  if (startIndex >= count) {\n    startIndex -= count;\n  } else if (startIndex < 0) {\n    startIndex += count;\n  }\n\n  let endIndex = startIndex + 1;\n  if (endIndex >= count) {\n    endIndex -= count;\n  }\n\n  const start = coordinates[startIndex];\n  const x0 = start[0];\n  const y0 = start[1];\n  const end = coordinates[endIndex];\n  const dx = end[0] - x0;\n  const dy = end[1] - y0;\n\n  return [x0 + dx * along, y0 + dy * along];\n}\n\n/***\n * @template Return\n * @typedef {import(\"../Observable\").OnSignature<import(\"../Observable\").EventTypes, import(\"../events/Event.js\").default, Return> &\n *   import(\"../Observable\").OnSignature<import(\"../ObjectEventType\").Types|\n *     'change:active', import(\"../Object\").ObjectEvent, Return> &\n *   import(\"../Observable\").OnSignature<'drawabort'|'drawend'|'drawstart', DrawEvent, Return> &\n *   import(\"../Observable\").CombinedOnSignature<import(\"../Observable\").EventTypes|import(\"../ObjectEventType\").Types|\n *     'change:active'|'drawabort'|'drawend'|'drawstart', Return>} DrawOnSignature\n */\n\n/**\n * @classdesc\n * Interaction for drawing feature geometries.\n *\n * @fires DrawEvent\n * @api\n */\nclass Draw extends PointerInteraction {\n  /**\n   * @param {Options} options Options.\n   */\n  constructor(options) {\n    const pointerOptions = /** @type {import(\"./Pointer.js\").Options} */ (\n      options\n    );\n    if (!pointerOptions.stopDown) {\n      pointerOptions.stopDown = FALSE;\n    }\n\n    super(pointerOptions);\n\n    /***\n     * @type {DrawOnSignature<import(\"../events\").EventsKey>}\n     */\n    this.on;\n\n    /***\n     * @type {DrawOnSignature<import(\"../events\").EventsKey>}\n     */\n    this.once;\n\n    /***\n     * @type {DrawOnSignature<void>}\n     */\n    this.un;\n\n    /**\n     * @type {boolean}\n     * @private\n     */\n    this.shouldHandle_ = false;\n\n    /**\n     * @type {import(\"../pixel.js\").Pixel}\n     * @private\n     */\n    this.downPx_ = null;\n\n    /**\n     * @type {?}\n     * @private\n     */\n    this.downTimeout_;\n\n    /**\n     * @type {number|undefined}\n     * @private\n     */\n    this.lastDragTime_;\n\n    /**\n     * Pointer type of the last pointermove event\n     * @type {string}\n     * @private\n     */\n    this.pointerType_;\n\n    /**\n     * @type {boolean}\n     * @private\n     */\n    this.freehand_ = false;\n\n    /**\n     * Target source for drawn features.\n     * @type {VectorSource|null}\n     * @private\n     */\n    this.source_ = options.source ? options.source : null;\n\n    /**\n     * Target collection for drawn features.\n     * @type {import(\"../Collection.js\").default<Feature>|null}\n     * @private\n     */\n    this.features_ = options.features ? options.features : null;\n\n    /**\n     * Pixel distance for snapping.\n     * @type {number}\n     * @private\n     */\n    this.snapTolerance_ = options.snapTolerance ? options.snapTolerance : 12;\n\n    /**\n     * Geometry type.\n     * @type {import(\"../geom/Geometry.js\").Type}\n     * @private\n     */\n    this.type_ = /** @type {import(\"../geom/Geometry.js\").Type} */ (\n      options.type\n    );\n\n    /**\n     * Drawing mode (derived from geometry type.\n     * @type {Mode}\n     * @private\n     */\n    this.mode_ = getMode(this.type_);\n\n    /**\n     * Stop click, singleclick, and doubleclick events from firing during drawing.\n     * Default is `false`.\n     * @type {boolean}\n     * @private\n     */\n    this.stopClick_ = !!options.stopClick;\n\n    /**\n     * The number of points that must be drawn before a polygon ring or line\n     * string can be finished.  The default is 3 for polygon rings and 2 for\n     * line strings.\n     * @type {number}\n     * @private\n     */\n    this.minPoints_ = options.minPoints\n      ? options.minPoints\n      : this.mode_ === 'Polygon'\n      ? 3\n      : 2;\n\n    /**\n     * The number of points that can be drawn before a polygon ring or line string\n     * is finished. The default is no restriction.\n     * @type {number}\n     * @private\n     */\n    this.maxPoints_ =\n      this.mode_ === 'Circle'\n        ? 2\n        : options.maxPoints\n        ? options.maxPoints\n        : Infinity;\n\n    /**\n     * A function to decide if a potential finish coordinate is permissible\n     * @private\n     * @type {import(\"../events/condition.js\").Condition}\n     */\n    this.finishCondition_ = options.finishCondition\n      ? options.finishCondition\n      : TRUE;\n\n    /**\n     * @private\n     * @type {import(\"../geom/Geometry.js\").GeometryLayout}\n     */\n    this.geometryLayout_ = options.geometryLayout\n      ? options.geometryLayout\n      : 'XY';\n\n    let geometryFunction = options.geometryFunction;\n    if (!geometryFunction) {\n      const mode = this.mode_;\n      if (mode === 'Circle') {\n        /**\n         * @param {!LineCoordType} coordinates The coordinates.\n         * @param {import(\"../geom/SimpleGeometry.js\").default|undefined} geometry Optional geometry.\n         * @param {import(\"../proj/Projection.js\").default} projection The view projection.\n         * @return {import(\"../geom/SimpleGeometry.js\").default} A geometry.\n         */\n        geometryFunction = function (coordinates, geometry, projection) {\n          const circle = geometry\n            ? /** @type {Circle} */ (geometry)\n            : new Circle([NaN, NaN]);\n          const center = fromUserCoordinate(coordinates[0], projection);\n          const squaredLength = squaredCoordinateDistance(\n            center,\n            fromUserCoordinate(coordinates[coordinates.length - 1], projection)\n          );\n          circle.setCenterAndRadius(\n            center,\n            Math.sqrt(squaredLength),\n            this.geometryLayout_\n          );\n          const userProjection = getUserProjection();\n          if (userProjection) {\n            circle.transform(projection, userProjection);\n          }\n          return circle;\n        };\n      } else {\n        let Constructor;\n        if (mode === 'Point') {\n          Constructor = Point;\n        } else if (mode === 'LineString') {\n          Constructor = LineString;\n        } else if (mode === 'Polygon') {\n          Constructor = Polygon;\n        }\n        /**\n         * @param {!LineCoordType} coordinates The coordinates.\n         * @param {import(\"../geom/SimpleGeometry.js\").default|undefined} geometry Optional geometry.\n         * @param {import(\"../proj/Projection.js\").default} projection The view projection.\n         * @return {import(\"../geom/SimpleGeometry.js\").default} A geometry.\n         */\n        geometryFunction = function (coordinates, geometry, projection) {\n          if (geometry) {\n            if (mode === 'Polygon') {\n              if (coordinates[0].length) {\n                // Add a closing coordinate to match the first\n                geometry.setCoordinates(\n                  [coordinates[0].concat([coordinates[0][0]])],\n                  this.geometryLayout_\n                );\n              } else {\n                geometry.setCoordinates([], this.geometryLayout_);\n              }\n            } else {\n              geometry.setCoordinates(coordinates, this.geometryLayout_);\n            }\n          } else {\n            geometry = new Constructor(coordinates, this.geometryLayout_);\n          }\n          return geometry;\n        };\n      }\n    }\n\n    /**\n     * @type {GeometryFunction}\n     * @private\n     */\n    this.geometryFunction_ = geometryFunction;\n\n    /**\n     * @type {number}\n     * @private\n     */\n    this.dragVertexDelay_ =\n      options.dragVertexDelay !== undefined ? options.dragVertexDelay : 500;\n\n    /**\n     * Finish coordinate for the feature (first point for polygons, last point for\n     * linestrings).\n     * @type {import(\"../coordinate.js\").Coordinate}\n     * @private\n     */\n    this.finishCoordinate_ = null;\n\n    /**\n     * Sketch feature.\n     * @type {Feature<import('../geom/SimpleGeometry.js').default>}\n     * @private\n     */\n    this.sketchFeature_ = null;\n\n    /**\n     * Sketch point.\n     * @type {Feature<Point>}\n     * @private\n     */\n    this.sketchPoint_ = null;\n\n    /**\n     * Sketch coordinates. Used when drawing a line or polygon.\n     * @type {SketchCoordType}\n     * @private\n     */\n    this.sketchCoords_ = null;\n\n    /**\n     * Sketch line. Used when drawing polygon.\n     * @type {Feature<LineString>}\n     * @private\n     */\n    this.sketchLine_ = null;\n\n    /**\n     * Sketch line coordinates. Used when drawing a polygon or circle.\n     * @type {LineCoordType}\n     * @private\n     */\n    this.sketchLineCoords_ = null;\n\n    /**\n     * Squared tolerance for handling up events.  If the squared distance\n     * between a down and up event is greater than this tolerance, up events\n     * will not be handled.\n     * @type {number}\n     * @private\n     */\n    this.squaredClickTolerance_ = options.clickTolerance\n      ? options.clickTolerance * options.clickTolerance\n      : 36;\n\n    /**\n     * Draw overlay where our sketch features are drawn.\n     * @type {VectorLayer}\n     * @private\n     */\n    this.overlay_ = new VectorLayer({\n      source: new VectorSource({\n        useSpatialIndex: false,\n        wrapX: options.wrapX ? options.wrapX : false,\n      }),\n      style: options.style ? options.style : getDefaultStyleFunction(),\n      updateWhileInteracting: true,\n    });\n\n    /**\n     * Name of the geometry attribute for newly created features.\n     * @type {string|undefined}\n     * @private\n     */\n    this.geometryName_ = options.geometryName;\n\n    /**\n     * @private\n     * @type {import(\"../events/condition.js\").Condition}\n     */\n    this.condition_ = options.condition ? options.condition : noModifierKeys;\n\n    /**\n     * @private\n     * @type {import(\"../events/condition.js\").Condition}\n     */\n    this.freehandCondition_;\n    if (options.freehand) {\n      this.freehandCondition_ = always;\n    } else {\n      this.freehandCondition_ = options.freehandCondition\n        ? options.freehandCondition\n        : shiftKeyOnly;\n    }\n\n    /**\n     * @type {import(\"../events/condition.js\").Condition}\n     * @private\n     */\n    this.traceCondition_;\n    this.setTrace(options.trace || false);\n\n    /**\n     * @type {TraceState}\n     * @private\n     */\n    this.traceState_ = {active: false};\n\n    /**\n     * @type {VectorSource|null}\n     * @private\n     */\n    this.traceSource_ = options.traceSource || options.source || null;\n\n    this.addChangeListener(InteractionProperty.ACTIVE, this.updateState_);\n  }\n\n  /**\n   * Toggle tracing mode or set a tracing condition.\n   *\n   * @param {boolean|import(\"../events/condition.js\").Condition} trace A boolean to toggle tracing mode or an event\n   *     condition that will be checked when a feature is clicked to determine if tracing should be active.\n   */\n  setTrace(trace) {\n    let condition;\n    if (!trace) {\n      condition = never;\n    } else if (trace === true) {\n      condition = always;\n    } else {\n      condition = trace;\n    }\n    this.traceCondition_ = condition;\n  }\n\n  /**\n   * Remove the interaction from its current map and attach it to the new map.\n   * Subclasses may set up event handlers to get notified about changes to\n   * the map here.\n   * @param {import(\"../Map.js\").default} map Map.\n   */\n  setMap(map) {\n    super.setMap(map);\n    this.updateState_();\n  }\n\n  /**\n   * Get the overlay layer that this interaction renders sketch features to.\n   * @return {VectorLayer} Overlay layer.\n   * @api\n   */\n  getOverlay() {\n    return this.overlay_;\n  }\n\n  /**\n   * Handles the {@link module:ol/MapBrowserEvent~MapBrowserEvent map browser event} and may actually draw or finish the drawing.\n   * @param {import(\"../MapBrowserEvent.js\").default} event Map browser event.\n   * @return {boolean} `false` to stop event propagation.\n   * @api\n   */\n  handleEvent(event) {\n    if (event.originalEvent.type === EventType.CONTEXTMENU) {\n      // Avoid context menu for long taps when drawing on mobile\n      event.originalEvent.preventDefault();\n    }\n    this.freehand_ = this.mode_ !== 'Point' && this.freehandCondition_(event);\n    let move = event.type === MapBrowserEventType.POINTERMOVE;\n    let pass = true;\n    if (\n      !this.freehand_ &&\n      this.lastDragTime_ &&\n      event.type === MapBrowserEventType.POINTERDRAG\n    ) {\n      const now = Date.now();\n      if (now - this.lastDragTime_ >= this.dragVertexDelay_) {\n        this.downPx_ = event.pixel;\n        this.shouldHandle_ = !this.freehand_;\n        move = true;\n      } else {\n        this.lastDragTime_ = undefined;\n      }\n      if (this.shouldHandle_ && this.downTimeout_ !== undefined) {\n        clearTimeout(this.downTimeout_);\n        this.downTimeout_ = undefined;\n      }\n    }\n    if (\n      this.freehand_ &&\n      event.type === MapBrowserEventType.POINTERDRAG &&\n      this.sketchFeature_ !== null\n    ) {\n      this.addToDrawing_(event.coordinate);\n      pass = false;\n    } else if (\n      this.freehand_ &&\n      event.type === MapBrowserEventType.POINTERDOWN\n    ) {\n      pass = false;\n    } else if (move && this.getPointerCount() < 2) {\n      pass = event.type === MapBrowserEventType.POINTERMOVE;\n      if (pass && this.freehand_) {\n        this.handlePointerMove_(event);\n        if (this.shouldHandle_) {\n          // Avoid page scrolling when freehand drawing on mobile\n          event.originalEvent.preventDefault();\n        }\n      } else if (\n        event.originalEvent.pointerType === 'mouse' ||\n        (event.type === MapBrowserEventType.POINTERDRAG &&\n          this.downTimeout_ === undefined)\n      ) {\n        this.handlePointerMove_(event);\n      }\n    } else if (event.type === MapBrowserEventType.DBLCLICK) {\n      pass = false;\n    }\n\n    return super.handleEvent(event) && pass;\n  }\n\n  /**\n   * Handle pointer down events.\n   * @param {import(\"../MapBrowserEvent.js\").default} event Event.\n   * @return {boolean} If the event was consumed.\n   */\n  handleDownEvent(event) {\n    this.shouldHandle_ = !this.freehand_;\n\n    if (this.freehand_) {\n      this.downPx_ = event.pixel;\n      if (!this.finishCoordinate_) {\n        this.startDrawing_(event.coordinate);\n      }\n      return true;\n    }\n\n    if (!this.condition_(event)) {\n      this.lastDragTime_ = undefined;\n      return false;\n    }\n\n    this.lastDragTime_ = Date.now();\n    this.downTimeout_ = setTimeout(() => {\n      this.handlePointerMove_(\n        new MapBrowserEvent(\n          MapBrowserEventType.POINTERMOVE,\n          event.map,\n          event.originalEvent,\n          false,\n          event.frameState\n        )\n      );\n    }, this.dragVertexDelay_);\n    this.downPx_ = event.pixel;\n    return true;\n  }\n\n  /**\n   * @private\n   */\n  deactivateTrace_() {\n    this.traceState_ = {active: false};\n  }\n\n  /**\n   * Activate or deactivate trace state based on a browser event.\n   * @param {import(\"../MapBrowserEvent.js\").default} event Event.\n   * @private\n   */\n  toggleTraceState_(event) {\n    if (!this.traceSource_ || !this.traceCondition_(event)) {\n      return;\n    }\n\n    if (this.traceState_.active) {\n      this.deactivateTrace_();\n      return;\n    }\n\n    const map = this.getMap();\n    const lowerLeft = map.getCoordinateFromPixel([\n      event.pixel[0] - this.snapTolerance_,\n      event.pixel[1] + this.snapTolerance_,\n    ]);\n    const upperRight = map.getCoordinateFromPixel([\n      event.pixel[0] + this.snapTolerance_,\n      event.pixel[1] - this.snapTolerance_,\n    ]);\n    const extent = boundingExtent([lowerLeft, upperRight]);\n    const features = this.traceSource_.getFeaturesInExtent(extent);\n    if (features.length === 0) {\n      return;\n    }\n\n    const targets = getTraceTargets(event.coordinate, features);\n    if (targets.length) {\n      this.traceState_ = {\n        active: true,\n        startPx: event.pixel.slice(),\n        targets: targets,\n        targetIndex: -1,\n      };\n    }\n  }\n\n  /**\n   * @param {TraceTarget} target The trace target.\n   * @param {number} endIndex The new end index of the trace.\n   * @private\n   */\n  addOrRemoveTracedCoordinates_(target, endIndex) {\n    // three cases to handle:\n    //  1. traced in the same direction and points need adding\n    //  2. traced in the same direction and points need removing\n    //  3. traced in a new direction\n    const previouslyForward = target.startIndex <= target.endIndex;\n    const currentlyForward = target.startIndex <= endIndex;\n    if (previouslyForward === currentlyForward) {\n      // same direction\n      if (\n        (previouslyForward && endIndex > target.endIndex) ||\n        (!previouslyForward && endIndex < target.endIndex)\n      ) {\n        // case 1 - add new points\n        this.addTracedCoordinates_(target, target.endIndex, endIndex);\n      } else if (\n        (previouslyForward && endIndex < target.endIndex) ||\n        (!previouslyForward && endIndex > target.endIndex)\n      ) {\n        // case 2 - remove old points\n        this.removeTracedCoordinates_(endIndex, target.endIndex);\n      }\n    } else {\n      // case 3 - remove old points, add new points\n      this.removeTracedCoordinates_(target.startIndex, target.endIndex);\n      this.addTracedCoordinates_(target, target.startIndex, endIndex);\n    }\n  }\n\n  /**\n   * @param {number} fromIndex The start index.\n   * @param {number} toIndex The end index.\n   * @private\n   */\n  removeTracedCoordinates_(fromIndex, toIndex) {\n    if (fromIndex === toIndex) {\n      return;\n    }\n\n    let remove = 0;\n    if (fromIndex < toIndex) {\n      const start = Math.ceil(fromIndex);\n      let end = Math.floor(toIndex);\n      if (end === toIndex) {\n        end -= 1;\n      }\n      remove = end - start + 1;\n    } else {\n      const start = Math.floor(fromIndex);\n      let end = Math.ceil(toIndex);\n      if (end === toIndex) {\n        end += 1;\n      }\n      remove = start - end + 1;\n    }\n\n    if (remove > 0) {\n      this.removeLastPoints_(remove);\n    }\n  }\n\n  /**\n   * @param {TraceTarget} target The trace target.\n   * @param {number} fromIndex The start index.\n   * @param {number} toIndex The end index.\n   * @private\n   */\n  addTracedCoordinates_(target, fromIndex, toIndex) {\n    if (fromIndex === toIndex) {\n      return;\n    }\n\n    const coordinates = [];\n    if (fromIndex < toIndex) {\n      // forward trace\n      const start = Math.ceil(fromIndex);\n      let end = Math.floor(toIndex);\n      if (end === toIndex) {\n        // if end is snapped to a vertex, it will be added later\n        end -= 1;\n      }\n      for (let i = start; i <= end; ++i) {\n        coordinates.push(getCoordinate(target.coordinates, i));\n      }\n    } else {\n      // reverse trace\n      const start = Math.floor(fromIndex);\n      let end = Math.ceil(toIndex);\n      if (end === toIndex) {\n        end += 1;\n      }\n      for (let i = start; i >= end; --i) {\n        coordinates.push(getCoordinate(target.coordinates, i));\n      }\n    }\n    if (coordinates.length) {\n      this.appendCoordinates(coordinates);\n    }\n  }\n\n  /**\n   * Update the trace.\n   * @param {import(\"../MapBrowserEvent.js\").default} event Event.\n   * @private\n   */\n  updateTrace_(event) {\n    const traceState = this.traceState_;\n    if (!traceState.active) {\n      return;\n    }\n\n    if (traceState.targetIndex === -1) {\n      // check if we are ready to pick a target\n      if (distance(traceState.startPx, event.pixel) < this.snapTolerance_) {\n        return;\n      }\n    }\n\n    const updatedTraceTarget = getTraceTargetUpdate(\n      event.coordinate,\n      traceState,\n      this.getMap(),\n      this.snapTolerance_\n    );\n\n    if (traceState.targetIndex !== updatedTraceTarget.index) {\n      // target changed\n      if (traceState.targetIndex !== -1) {\n        // remove points added during previous trace\n        const oldTarget = traceState.targets[traceState.targetIndex];\n        this.removeTracedCoordinates_(oldTarget.startIndex, oldTarget.endIndex);\n      }\n      // add points for the new target\n      const newTarget = traceState.targets[updatedTraceTarget.index];\n      this.addTracedCoordinates_(\n        newTarget,\n        newTarget.startIndex,\n        updatedTraceTarget.endIndex\n      );\n    } else {\n      // target stayed the same\n      const target = traceState.targets[traceState.targetIndex];\n      this.addOrRemoveTracedCoordinates_(target, updatedTraceTarget.endIndex);\n    }\n\n    // modify the state with updated info\n    traceState.targetIndex = updatedTraceTarget.index;\n    const target = traceState.targets[traceState.targetIndex];\n    target.endIndex = updatedTraceTarget.endIndex;\n\n    // update event coordinate and pixel to match end point of final segment\n    const coordinate = interpolateCoordinate(\n      target.coordinates,\n      target.endIndex\n    );\n    const pixel = this.getMap().getPixelFromCoordinate(coordinate);\n    event.coordinate = coordinate;\n    event.pixel = [Math.round(pixel[0]), Math.round(pixel[1])];\n  }\n\n  /**\n   * Handle pointer up events.\n   * @param {import(\"../MapBrowserEvent.js\").default} event Event.\n   * @return {boolean} If the event was consumed.\n   */\n  handleUpEvent(event) {\n    let pass = true;\n\n    if (this.getPointerCount() === 0) {\n      if (this.downTimeout_) {\n        clearTimeout(this.downTimeout_);\n        this.downTimeout_ = undefined;\n      }\n\n      this.handlePointerMove_(event);\n      const tracing = this.traceState_.active;\n      this.toggleTraceState_(event);\n\n      if (this.shouldHandle_) {\n        const startingToDraw = !this.finishCoordinate_;\n        if (startingToDraw) {\n          this.startDrawing_(event.coordinate);\n        }\n        if (!startingToDraw && this.freehand_) {\n          this.finishDrawing();\n        } else if (\n          !this.freehand_ &&\n          (!startingToDraw || this.mode_ === 'Point')\n        ) {\n          if (this.atFinish_(event.pixel, tracing)) {\n            if (this.finishCondition_(event)) {\n              this.finishDrawing();\n            }\n          } else {\n            this.addToDrawing_(event.coordinate);\n          }\n        }\n        pass = false;\n      } else if (this.freehand_) {\n        this.abortDrawing();\n      }\n    }\n\n    if (!pass && this.stopClick_) {\n      event.preventDefault();\n    }\n    return pass;\n  }\n\n  /**\n   * Handle move events.\n   * @param {import(\"../MapBrowserEvent.js\").default} event A move event.\n   * @private\n   */\n  handlePointerMove_(event) {\n    this.pointerType_ = event.originalEvent.pointerType;\n    if (\n      this.downPx_ &&\n      ((!this.freehand_ && this.shouldHandle_) ||\n        (this.freehand_ && !this.shouldHandle_))\n    ) {\n      const downPx = this.downPx_;\n      const clickPx = event.pixel;\n      const dx = downPx[0] - clickPx[0];\n      const dy = downPx[1] - clickPx[1];\n      const squaredDistance = dx * dx + dy * dy;\n      this.shouldHandle_ = this.freehand_\n        ? squaredDistance > this.squaredClickTolerance_\n        : squaredDistance <= this.squaredClickTolerance_;\n      if (!this.shouldHandle_) {\n        return;\n      }\n    }\n\n    if (!this.finishCoordinate_) {\n      this.createOrUpdateSketchPoint_(event.coordinate.slice());\n      return;\n    }\n\n    this.updateTrace_(event);\n    this.modifyDrawing_(event.coordinate);\n  }\n\n  /**\n   * Determine if an event is within the snapping tolerance of the start coord.\n   * @param {import(\"../pixel.js\").Pixel} pixel Pixel.\n   * @param {boolean} [tracing] Drawing in trace mode (only stop if at the starting point).\n   * @return {boolean} The event is within the snapping tolerance of the start.\n   * @private\n   */\n  atFinish_(pixel, tracing) {\n    let at = false;\n    if (this.sketchFeature_) {\n      let potentiallyDone = false;\n      let potentiallyFinishCoordinates = [this.finishCoordinate_];\n      const mode = this.mode_;\n      if (mode === 'Point') {\n        at = true;\n      } else if (mode === 'Circle') {\n        at = this.sketchCoords_.length === 2;\n      } else if (mode === 'LineString') {\n        potentiallyDone =\n          !tracing && this.sketchCoords_.length > this.minPoints_;\n      } else if (mode === 'Polygon') {\n        const sketchCoords = /** @type {PolyCoordType} */ (this.sketchCoords_);\n        potentiallyDone = sketchCoords[0].length > this.minPoints_;\n        potentiallyFinishCoordinates = [\n          sketchCoords[0][0],\n          sketchCoords[0][sketchCoords[0].length - 2],\n        ];\n        if (tracing) {\n          potentiallyFinishCoordinates = [sketchCoords[0][0]];\n        } else {\n          potentiallyFinishCoordinates = [\n            sketchCoords[0][0],\n            sketchCoords[0][sketchCoords[0].length - 2],\n          ];\n        }\n      }\n      if (potentiallyDone) {\n        const map = this.getMap();\n        for (let i = 0, ii = potentiallyFinishCoordinates.length; i < ii; i++) {\n          const finishCoordinate = potentiallyFinishCoordinates[i];\n          const finishPixel = map.getPixelFromCoordinate(finishCoordinate);\n          const dx = pixel[0] - finishPixel[0];\n          const dy = pixel[1] - finishPixel[1];\n          const snapTolerance = this.freehand_ ? 1 : this.snapTolerance_;\n          at = Math.sqrt(dx * dx + dy * dy) <= snapTolerance;\n          if (at) {\n            this.finishCoordinate_ = finishCoordinate;\n            break;\n          }\n        }\n      }\n    }\n    return at;\n  }\n\n  /**\n   * @param {import(\"../coordinate\").Coordinate} coordinates Coordinate.\n   * @private\n   */\n  createOrUpdateSketchPoint_(coordinates) {\n    if (!this.sketchPoint_) {\n      this.sketchPoint_ = new Feature(new Point(coordinates));\n      this.updateSketchFeatures_();\n    } else {\n      const sketchPointGeom = this.sketchPoint_.getGeometry();\n      sketchPointGeom.setCoordinates(coordinates);\n    }\n  }\n\n  /**\n   * @param {import(\"../geom/Polygon.js\").default} geometry Polygon geometry.\n   * @private\n   */\n  createOrUpdateCustomSketchLine_(geometry) {\n    if (!this.sketchLine_) {\n      this.sketchLine_ = new Feature();\n    }\n    const ring = geometry.getLinearRing(0);\n    let sketchLineGeom = this.sketchLine_.getGeometry();\n    if (!sketchLineGeom) {\n      sketchLineGeom = new LineString(\n        ring.getFlatCoordinates(),\n        ring.getLayout()\n      );\n      this.sketchLine_.setGeometry(sketchLineGeom);\n    } else {\n      sketchLineGeom.setFlatCoordinates(\n        ring.getLayout(),\n        ring.getFlatCoordinates()\n      );\n      sketchLineGeom.changed();\n    }\n  }\n\n  /**\n   * Start the drawing.\n   * @param {import(\"../coordinate.js\").Coordinate} start Start coordinate.\n   * @private\n   */\n  startDrawing_(start) {\n    const projection = this.getMap().getView().getProjection();\n    const stride = getStrideForLayout(this.geometryLayout_);\n    while (start.length < stride) {\n      start.push(0);\n    }\n    this.finishCoordinate_ = start;\n    if (this.mode_ === 'Point') {\n      this.sketchCoords_ = start.slice();\n    } else if (this.mode_ === 'Polygon') {\n      this.sketchCoords_ = [[start.slice(), start.slice()]];\n      this.sketchLineCoords_ = this.sketchCoords_[0];\n    } else {\n      this.sketchCoords_ = [start.slice(), start.slice()];\n    }\n    if (this.sketchLineCoords_) {\n      this.sketchLine_ = new Feature(new LineString(this.sketchLineCoords_));\n    }\n    const geometry = this.geometryFunction_(\n      this.sketchCoords_,\n      undefined,\n      projection\n    );\n    this.sketchFeature_ = new Feature();\n    if (this.geometryName_) {\n      this.sketchFeature_.setGeometryName(this.geometryName_);\n    }\n    this.sketchFeature_.setGeometry(geometry);\n    this.updateSketchFeatures_();\n    this.dispatchEvent(\n      new DrawEvent(DrawEventType.DRAWSTART, this.sketchFeature_)\n    );\n  }\n\n  /**\n   * Modify the drawing.\n   * @param {import(\"../coordinate.js\").Coordinate} coordinate Coordinate.\n   * @private\n   */\n  modifyDrawing_(coordinate) {\n    const map = this.getMap();\n    const geometry = this.sketchFeature_.getGeometry();\n    const projection = map.getView().getProjection();\n    const stride = getStrideForLayout(this.geometryLayout_);\n    let coordinates, last;\n    while (coordinate.length < stride) {\n      coordinate.push(0);\n    }\n    if (this.mode_ === 'Point') {\n      last = this.sketchCoords_;\n    } else if (this.mode_ === 'Polygon') {\n      coordinates = /** @type {PolyCoordType} */ (this.sketchCoords_)[0];\n      last = coordinates[coordinates.length - 1];\n      if (this.atFinish_(map.getPixelFromCoordinate(coordinate))) {\n        // snap to finish\n        coordinate = this.finishCoordinate_.slice();\n      }\n    } else {\n      coordinates = this.sketchCoords_;\n      last = coordinates[coordinates.length - 1];\n    }\n    last[0] = coordinate[0];\n    last[1] = coordinate[1];\n    this.geometryFunction_(\n      /** @type {!LineCoordType} */ (this.sketchCoords_),\n      geometry,\n      projection\n    );\n    if (this.sketchPoint_) {\n      const sketchPointGeom = this.sketchPoint_.getGeometry();\n      sketchPointGeom.setCoordinates(coordinate);\n    }\n    if (geometry.getType() === 'Polygon' && this.mode_ !== 'Polygon') {\n      this.createOrUpdateCustomSketchLine_(/** @type {Polygon} */ (geometry));\n    } else if (this.sketchLineCoords_) {\n      const sketchLineGeom = this.sketchLine_.getGeometry();\n      sketchLineGeom.setCoordinates(this.sketchLineCoords_);\n    }\n    this.updateSketchFeatures_();\n  }\n\n  /**\n   * Add a new coordinate to the drawing.\n   * @param {!PointCoordType} coordinate Coordinate\n   * @private\n   */\n  addToDrawing_(coordinate) {\n    const geometry = this.sketchFeature_.getGeometry();\n    const projection = this.getMap().getView().getProjection();\n    let done;\n    let coordinates;\n    const mode = this.mode_;\n    if (mode === 'LineString' || mode === 'Circle') {\n      this.finishCoordinate_ = coordinate.slice();\n      coordinates = /** @type {LineCoordType} */ (this.sketchCoords_);\n      if (coordinates.length >= this.maxPoints_) {\n        if (this.freehand_) {\n          coordinates.pop();\n        } else {\n          done = true;\n        }\n      }\n      coordinates.push(coordinate.slice());\n      this.geometryFunction_(coordinates, geometry, projection);\n    } else if (mode === 'Polygon') {\n      coordinates = /** @type {PolyCoordType} */ (this.sketchCoords_)[0];\n      if (coordinates.length >= this.maxPoints_) {\n        if (this.freehand_) {\n          coordinates.pop();\n        } else {\n          done = true;\n        }\n      }\n      coordinates.push(coordinate.slice());\n      if (done) {\n        this.finishCoordinate_ = coordinates[0];\n      }\n      this.geometryFunction_(this.sketchCoords_, geometry, projection);\n    }\n    this.createOrUpdateSketchPoint_(coordinate.slice());\n    this.updateSketchFeatures_();\n    if (done) {\n      this.finishDrawing();\n    }\n  }\n\n  /**\n   * @param {number} n The number of points to remove.\n   */\n  removeLastPoints_(n) {\n    if (!this.sketchFeature_) {\n      return;\n    }\n    const geometry = this.sketchFeature_.getGeometry();\n    const projection = this.getMap().getView().getProjection();\n    const mode = this.mode_;\n    for (let i = 0; i < n; ++i) {\n      let coordinates;\n      if (mode === 'LineString' || mode === 'Circle') {\n        coordinates = /** @type {LineCoordType} */ (this.sketchCoords_);\n        coordinates.splice(-2, 1);\n        if (coordinates.length >= 2) {\n          this.finishCoordinate_ = coordinates[coordinates.length - 2].slice();\n          const finishCoordinate = this.finishCoordinate_.slice();\n          coordinates[coordinates.length - 1] = finishCoordinate;\n          this.createOrUpdateSketchPoint_(finishCoordinate);\n        }\n        this.geometryFunction_(coordinates, geometry, projection);\n        if (geometry.getType() === 'Polygon' && this.sketchLine_) {\n          this.createOrUpdateCustomSketchLine_(\n            /** @type {Polygon} */ (geometry)\n          );\n        }\n      } else if (mode === 'Polygon') {\n        coordinates = /** @type {PolyCoordType} */ (this.sketchCoords_)[0];\n        coordinates.splice(-2, 1);\n        const sketchLineGeom = this.sketchLine_.getGeometry();\n        if (coordinates.length >= 2) {\n          const finishCoordinate = coordinates[coordinates.length - 2].slice();\n          coordinates[coordinates.length - 1] = finishCoordinate;\n          this.createOrUpdateSketchPoint_(finishCoordinate);\n        }\n        sketchLineGeom.setCoordinates(coordinates);\n        this.geometryFunction_(this.sketchCoords_, geometry, projection);\n      }\n\n      if (coordinates.length === 1) {\n        this.abortDrawing();\n        break;\n      }\n    }\n\n    this.updateSketchFeatures_();\n  }\n\n  /**\n   * Remove last point of the feature currently being drawn. Does not do anything when\n   * drawing POINT or MULTI_POINT geometries.\n   * @api\n   */\n  removeLastPoint() {\n    this.removeLastPoints_(1);\n  }\n\n  /**\n   * Stop drawing and add the sketch feature to the target layer.\n   * The {@link module:ol/interaction/Draw~DrawEventType.DRAWEND} event is\n   * dispatched before inserting the feature.\n   * @api\n   */\n  finishDrawing() {\n    const sketchFeature = this.abortDrawing_();\n    if (!sketchFeature) {\n      return;\n    }\n    let coordinates = this.sketchCoords_;\n    const geometry = sketchFeature.getGeometry();\n    const projection = this.getMap().getView().getProjection();\n    if (this.mode_ === 'LineString') {\n      // remove the redundant last point\n      coordinates.pop();\n      this.geometryFunction_(coordinates, geometry, projection);\n    } else if (this.mode_ === 'Polygon') {\n      // remove the redundant last point in ring\n      /** @type {PolyCoordType} */ (coordinates)[0].pop();\n      this.geometryFunction_(coordinates, geometry, projection);\n      coordinates = geometry.getCoordinates();\n    }\n\n    // cast multi-part geometries\n    if (this.type_ === 'MultiPoint') {\n      sketchFeature.setGeometry(\n        new MultiPoint([/** @type {PointCoordType} */ (coordinates)])\n      );\n    } else if (this.type_ === 'MultiLineString') {\n      sketchFeature.setGeometry(\n        new MultiLineString([/** @type {LineCoordType} */ (coordinates)])\n      );\n    } else if (this.type_ === 'MultiPolygon') {\n      sketchFeature.setGeometry(\n        new MultiPolygon([/** @type {PolyCoordType} */ (coordinates)])\n      );\n    }\n\n    // First dispatch event to allow full set up of feature\n    this.dispatchEvent(new DrawEvent(DrawEventType.DRAWEND, sketchFeature));\n\n    // Then insert feature\n    if (this.features_) {\n      this.features_.push(sketchFeature);\n    }\n    if (this.source_) {\n      this.source_.addFeature(sketchFeature);\n    }\n  }\n\n  /**\n   * Stop drawing without adding the sketch feature to the target layer.\n   * @return {Feature<import(\"../geom/SimpleGeometry.js\").default>|null} The sketch feature (or null if none).\n   * @private\n   */\n  abortDrawing_() {\n    this.finishCoordinate_ = null;\n    const sketchFeature = this.sketchFeature_;\n    this.sketchFeature_ = null;\n    this.sketchPoint_ = null;\n    this.sketchLine_ = null;\n    this.overlay_.getSource().clear(true);\n    this.deactivateTrace_();\n    return sketchFeature;\n  }\n\n  /**\n   * Stop drawing without adding the sketch feature to the target layer.\n   * @api\n   */\n  abortDrawing() {\n    const sketchFeature = this.abortDrawing_();\n    if (sketchFeature) {\n      this.dispatchEvent(new DrawEvent(DrawEventType.DRAWABORT, sketchFeature));\n    }\n  }\n\n  /**\n   * Append coordinates to the end of the geometry that is currently being drawn.\n   * This can be used when drawing LineStrings or Polygons. Coordinates will\n   * either be appended to the current LineString or the outer ring of the current\n   * Polygon. If no geometry is being drawn, a new one will be created.\n   * @param {!LineCoordType} coordinates Linear coordinates to be appended to\n   * the coordinate array.\n   * @api\n   */\n  appendCoordinates(coordinates) {\n    const mode = this.mode_;\n    const newDrawing = !this.sketchFeature_;\n    if (newDrawing) {\n      this.startDrawing_(coordinates[0]);\n    }\n    /** @type {LineCoordType} */\n    let sketchCoords;\n    if (mode === 'LineString' || mode === 'Circle') {\n      sketchCoords = /** @type {LineCoordType} */ (this.sketchCoords_);\n    } else if (mode === 'Polygon') {\n      sketchCoords =\n        this.sketchCoords_ && this.sketchCoords_.length\n          ? /** @type {PolyCoordType} */ (this.sketchCoords_)[0]\n          : [];\n    } else {\n      return;\n    }\n\n    if (newDrawing) {\n      sketchCoords.shift();\n    }\n\n    // Remove last coordinate from sketch drawing (this coordinate follows cursor position)\n    sketchCoords.pop();\n\n    // Append coordinate list\n    for (let i = 0; i < coordinates.length; i++) {\n      this.addToDrawing_(coordinates[i]);\n    }\n\n    const ending = coordinates[coordinates.length - 1];\n    // Duplicate last coordinate for sketch drawing (cursor position)\n    this.addToDrawing_(ending);\n    this.modifyDrawing_(ending);\n  }\n\n  /**\n   * Initiate draw mode by starting from an existing geometry which will\n   * receive new additional points. This only works on features with\n   * `LineString` geometries, where the interaction will extend lines by adding\n   * points to the end of the coordinates array.\n   * This will change the original feature, instead of drawing a copy.\n   *\n   * The function will dispatch a `drawstart` event.\n   *\n   * @param {!Feature<LineString>} feature Feature to be extended.\n   * @api\n   */\n  extend(feature) {\n    const geometry = feature.getGeometry();\n    const lineString = geometry;\n    this.sketchFeature_ = feature;\n    this.sketchCoords_ = lineString.getCoordinates();\n    const last = this.sketchCoords_[this.sketchCoords_.length - 1];\n    this.finishCoordinate_ = last.slice();\n    this.sketchCoords_.push(last.slice());\n    this.sketchPoint_ = new Feature(new Point(last));\n    this.updateSketchFeatures_();\n    this.dispatchEvent(\n      new DrawEvent(DrawEventType.DRAWSTART, this.sketchFeature_)\n    );\n  }\n\n  /**\n   * Redraw the sketch features.\n   * @private\n   */\n  updateSketchFeatures_() {\n    const sketchFeatures = [];\n    if (this.sketchFeature_) {\n      sketchFeatures.push(this.sketchFeature_);\n    }\n    if (this.sketchLine_) {\n      sketchFeatures.push(this.sketchLine_);\n    }\n    if (this.sketchPoint_) {\n      sketchFeatures.push(this.sketchPoint_);\n    }\n    const overlaySource = this.overlay_.getSource();\n    overlaySource.clear(true);\n    overlaySource.addFeatures(sketchFeatures);\n  }\n\n  /**\n   * @private\n   */\n  updateState_() {\n    const map = this.getMap();\n    const active = this.getActive();\n    if (!map || !active) {\n      this.abortDrawing();\n    }\n    this.overlay_.setMap(active ? map : null);\n  }\n}\n\n/**\n * @return {import(\"../style/Style.js\").StyleFunction} Styles.\n */\nfunction getDefaultStyleFunction() {\n  const styles = createEditingStyle();\n  return function (feature, resolution) {\n    return styles[feature.getGeometry().getType()];\n  };\n}\n\n/**\n * Create a `geometryFunction` for `type: 'Circle'` that will create a regular\n * polygon with a user specified number of sides and start angle instead of a\n * {@link import(\"../geom/Circle.js\").Circle} geometry.\n * @param {number} [sides] Number of sides of the regular polygon.\n *     Default is 32.\n * @param {number} [angle] Angle of the first point in counter-clockwise\n *     radians. 0 means East.\n *     Default is the angle defined by the heading from the center of the\n *     regular polygon to the current pointer position.\n * @return {GeometryFunction} Function that draws a polygon.\n * @api\n */\nexport function createRegularPolygon(sides, angle) {\n  return function (coordinates, geometry, projection) {\n    const center = fromUserCoordinate(\n      /** @type {LineCoordType} */ (coordinates)[0],\n      projection\n    );\n    const end = fromUserCoordinate(\n      /** @type {LineCoordType} */ (coordinates)[coordinates.length - 1],\n      projection\n    );\n    const radius = Math.sqrt(squaredCoordinateDistance(center, end));\n    geometry = geometry || fromCircle(new Circle(center), sides);\n\n    let internalAngle = angle;\n    if (!angle && angle !== 0) {\n      const x = end[0] - center[0];\n      const y = end[1] - center[1];\n      internalAngle = Math.atan2(y, x);\n    }\n    makeRegular(\n      /** @type {Polygon} */ (geometry),\n      center,\n      radius,\n      internalAngle\n    );\n\n    const userProjection = getUserProjection();\n    if (userProjection) {\n      geometry.transform(projection, userProjection);\n    }\n    return geometry;\n  };\n}\n\n/**\n * Create a `geometryFunction` that will create a box-shaped polygon (aligned\n * with the coordinate system axes).  Use this with the draw interaction and\n * `type: 'Circle'` to return a box instead of a circle geometry.\n * @return {GeometryFunction} Function that draws a box-shaped polygon.\n * @api\n */\nexport function createBox() {\n  return function (coordinates, geometry, projection) {\n    const extent = boundingExtent(\n      /** @type {LineCoordType} */ ([\n        coordinates[0],\n        coordinates[coordinates.length - 1],\n      ]).map(function (coordinate) {\n        return fromUserCoordinate(coordinate, projection);\n      })\n    );\n    const boxCoordinates = [\n      [\n        getBottomLeft(extent),\n        getBottomRight(extent),\n        getTopRight(extent),\n        getTopLeft(extent),\n        getBottomLeft(extent),\n      ],\n    ];\n    if (geometry) {\n      geometry.setCoordinates(boxCoordinates);\n    } else {\n      geometry = new Polygon(boxCoordinates);\n    }\n    const userProjection = getUserProjection();\n    if (userProjection) {\n      geometry.transform(projection, userProjection);\n    }\n    return geometry;\n  };\n}\n\n/**\n * Get the drawing mode.  The mode for multi-part geometries is the same as for\n * their single-part cousins.\n * @param {import(\"../geom/Geometry.js\").Type} type Geometry type.\n * @return {Mode} Drawing mode.\n */\nfunction getMode(type) {\n  switch (type) {\n    case 'Point':\n    case 'MultiPoint':\n      return 'Point';\n    case 'LineString':\n    case 'MultiLineString':\n      return 'LineString';\n    case 'Polygon':\n    case 'MultiPolygon':\n      return 'Polygon';\n    case 'Circle':\n      return 'Circle';\n    default:\n      throw new Error('Invalid type: ' + type);\n  }\n}\n\nexport default Draw;\n","/**\n * @module ol/interaction/Extent\n */\nimport Event from '../events/Event.js';\nimport Feature from '../Feature.js';\nimport MapBrowserEventType from '../MapBrowserEventType.js';\nimport Point from '../geom/Point.js';\nimport PointerInteraction from './Pointer.js';\nimport VectorLayer from '../layer/Vector.js';\nimport VectorSource from '../source/Vector.js';\nimport {always} from '../events/condition.js';\nimport {boundingExtent, getArea} from '../extent.js';\nimport {\n  closestOnSegment,\n  distance as coordinateDistance,\n  squaredDistance as squaredCoordinateDistance,\n  squaredDistanceToSegment,\n} from '../coordinate.js';\nimport {createEditingStyle} from '../style/Style.js';\nimport {fromExtent as polygonFromExtent} from '../geom/Polygon.js';\nimport {toUserExtent} from '../proj.js';\n\n/**\n * @typedef {Object} Options\n * @property {import(\"../events/condition.js\").Condition} [condition] A function that\n * takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a\n * boolean to indicate whether that event should be handled.\n * Default is {@link module:ol/events/condition.always}.\n * @property {import(\"../extent.js\").Extent} [extent] Initial extent. Defaults to no\n * initial extent.\n * @property {import(\"../style/Style.js\").StyleLike} [boxStyle]\n * Style for the drawn extent box. Defaults to the `Polygon` editing style\n * documented in {@link module:ol/style/Style~Style}\n * @property {number} [pixelTolerance=10] Pixel tolerance for considering the\n * pointer close enough to a segment or vertex for editing.\n * @property {import(\"../style/Style.js\").StyleLike} [pointerStyle]\n * Style for the cursor used to draw the extent. Defaults to the `Point` editing style\n * documented in {@link module:ol/style/Style~Style}\n * @property {boolean} [wrapX=false] Wrap the drawn extent across multiple maps\n * in the X direction? Only affects visuals, not functionality.\n */\n\n/**\n * @enum {string}\n */\nconst ExtentEventType = {\n  /**\n   * Triggered after the extent is changed\n   * @event ExtentEvent#extentchanged\n   * @api\n   */\n  EXTENTCHANGED: 'extentchanged',\n};\n\n/**\n * @classdesc\n * Events emitted by {@link module:ol/interaction/Extent~Extent} instances are\n * instances of this type.\n */\nexport class ExtentEvent extends Event {\n  /**\n   * @param {import(\"../extent.js\").Extent} extent the new extent\n   */\n  constructor(extent) {\n    super(ExtentEventType.EXTENTCHANGED);\n\n    /**\n     * The current extent.\n     * @type {import(\"../extent.js\").Extent}\n     * @api\n     */\n    this.extent = extent;\n  }\n}\n\n/***\n * @template Return\n * @typedef {import(\"../Observable\").OnSignature<import(\"../Observable\").EventTypes, import(\"../events/Event.js\").default, Return> &\n *   import(\"../Observable\").OnSignature<import(\"../ObjectEventType\").Types|\n *     'change:active', import(\"../Object\").ObjectEvent, Return> &\n *   import(\"../Observable\").OnSignature<'extentchanged', ExtentEvent, Return> &\n *   import(\"../Observable\").CombinedOnSignature<import(\"../Observable\").EventTypes|import(\"../ObjectEventType\").Types|\n *     'change:active'|'extentchanged', Return>} ExtentOnSignature\n */\n\n/**\n * @classdesc\n * Allows the user to draw a vector box by clicking and dragging on the map.\n * Once drawn, the vector box can be modified by dragging its vertices or edges.\n * This interaction is only supported for mouse devices.\n *\n * @fires ExtentEvent\n * @api\n */\nclass Extent extends PointerInteraction {\n  /**\n   * @param {Options} [options] Options.\n   */\n  constructor(options) {\n    options = options || {};\n\n    super(/** @type {import(\"./Pointer.js\").Options} */ (options));\n\n    /***\n     * @type {ExtentOnSignature<import(\"../events\").EventsKey>}\n     */\n    this.on;\n\n    /***\n     * @type {ExtentOnSignature<import(\"../events\").EventsKey>}\n     */\n    this.once;\n\n    /***\n     * @type {ExtentOnSignature<void>}\n     */\n    this.un;\n\n    /**\n     * Condition\n     * @type {import(\"../events/condition.js\").Condition}\n     * @private\n     */\n    this.condition_ = options.condition ? options.condition : always;\n\n    /**\n     * Extent of the drawn box\n     * @type {import(\"../extent.js\").Extent}\n     * @private\n     */\n    this.extent_ = null;\n\n    /**\n     * Handler for pointer move events\n     * @type {function (import(\"../coordinate.js\").Coordinate): import(\"../extent.js\").Extent|null}\n     * @private\n     */\n    this.pointerHandler_ = null;\n\n    /**\n     * Pixel threshold to snap to extent\n     * @type {number}\n     * @private\n     */\n    this.pixelTolerance_ =\n      options.pixelTolerance !== undefined ? options.pixelTolerance : 10;\n\n    /**\n     * Is the pointer snapped to an extent vertex\n     * @type {boolean}\n     * @private\n     */\n    this.snappedToVertex_ = false;\n\n    /**\n     * Feature for displaying the visible extent\n     * @type {Feature}\n     * @private\n     */\n    this.extentFeature_ = null;\n\n    /**\n     * Feature for displaying the visible pointer\n     * @type {Feature<Point>}\n     * @private\n     */\n    this.vertexFeature_ = null;\n\n    if (!options) {\n      options = {};\n    }\n\n    /**\n     * Layer for the extentFeature\n     * @type {VectorLayer}\n     * @private\n     */\n    this.extentOverlay_ = new VectorLayer({\n      source: new VectorSource({\n        useSpatialIndex: false,\n        wrapX: !!options.wrapX,\n      }),\n      style: options.boxStyle\n        ? options.boxStyle\n        : getDefaultExtentStyleFunction(),\n      updateWhileAnimating: true,\n      updateWhileInteracting: true,\n    });\n\n    /**\n     * Layer for the vertexFeature\n     * @type {VectorLayer}\n     * @private\n     */\n    this.vertexOverlay_ = new VectorLayer({\n      source: new VectorSource({\n        useSpatialIndex: false,\n        wrapX: !!options.wrapX,\n      }),\n      style: options.pointerStyle\n        ? options.pointerStyle\n        : getDefaultPointerStyleFunction(),\n      updateWhileAnimating: true,\n      updateWhileInteracting: true,\n    });\n\n    if (options.extent) {\n      this.setExtent(options.extent);\n    }\n  }\n\n  /**\n   * @param {import(\"../pixel.js\").Pixel} pixel cursor location\n   * @param {import(\"../Map.js\").default} map map\n   * @return {import(\"../coordinate.js\").Coordinate|null} snapped vertex on extent\n   * @private\n   */\n  snapToVertex_(pixel, map) {\n    const pixelCoordinate = map.getCoordinateFromPixelInternal(pixel);\n    const sortByDistance = function (a, b) {\n      return (\n        squaredDistanceToSegment(pixelCoordinate, a) -\n        squaredDistanceToSegment(pixelCoordinate, b)\n      );\n    };\n    const extent = this.getExtentInternal();\n    if (extent) {\n      //convert extents to line segments and find the segment closest to pixelCoordinate\n      const segments = getSegments(extent);\n      segments.sort(sortByDistance);\n      const closestSegment = segments[0];\n\n      let vertex = closestOnSegment(pixelCoordinate, closestSegment);\n      const vertexPixel = map.getPixelFromCoordinateInternal(vertex);\n\n      //if the distance is within tolerance, snap to the segment\n      if (coordinateDistance(pixel, vertexPixel) <= this.pixelTolerance_) {\n        //test if we should further snap to a vertex\n        const pixel1 = map.getPixelFromCoordinateInternal(closestSegment[0]);\n        const pixel2 = map.getPixelFromCoordinateInternal(closestSegment[1]);\n        const squaredDist1 = squaredCoordinateDistance(vertexPixel, pixel1);\n        const squaredDist2 = squaredCoordinateDistance(vertexPixel, pixel2);\n        const dist = Math.sqrt(Math.min(squaredDist1, squaredDist2));\n        this.snappedToVertex_ = dist <= this.pixelTolerance_;\n        if (this.snappedToVertex_) {\n          vertex =\n            squaredDist1 > squaredDist2 ? closestSegment[1] : closestSegment[0];\n        }\n        return vertex;\n      }\n    }\n    return null;\n  }\n\n  /**\n   * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent pointer move event\n   * @private\n   */\n  handlePointerMove_(mapBrowserEvent) {\n    const pixel = mapBrowserEvent.pixel;\n    const map = mapBrowserEvent.map;\n\n    let vertex = this.snapToVertex_(pixel, map);\n    if (!vertex) {\n      vertex = map.getCoordinateFromPixelInternal(pixel);\n    }\n    this.createOrUpdatePointerFeature_(vertex);\n  }\n\n  /**\n   * @param {import(\"../extent.js\").Extent} extent extent\n   * @return {Feature} extent as featrue\n   * @private\n   */\n  createOrUpdateExtentFeature_(extent) {\n    let extentFeature = this.extentFeature_;\n\n    if (!extentFeature) {\n      if (!extent) {\n        extentFeature = new Feature({});\n      } else {\n        extentFeature = new Feature(polygonFromExtent(extent));\n      }\n      this.extentFeature_ = extentFeature;\n      this.extentOverlay_.getSource().addFeature(extentFeature);\n    } else {\n      if (!extent) {\n        extentFeature.setGeometry(undefined);\n      } else {\n        extentFeature.setGeometry(polygonFromExtent(extent));\n      }\n    }\n    return extentFeature;\n  }\n\n  /**\n   * @param {import(\"../coordinate.js\").Coordinate} vertex location of feature\n   * @return {Feature} vertex as feature\n   * @private\n   */\n  createOrUpdatePointerFeature_(vertex) {\n    let vertexFeature = this.vertexFeature_;\n    if (!vertexFeature) {\n      vertexFeature = new Feature(new Point(vertex));\n      this.vertexFeature_ = vertexFeature;\n      this.vertexOverlay_.getSource().addFeature(vertexFeature);\n    } else {\n      const geometry = vertexFeature.getGeometry();\n      geometry.setCoordinates(vertex);\n    }\n    return vertexFeature;\n  }\n\n  /**\n   * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n   * @return {boolean} `false` to stop event propagation.\n   */\n  handleEvent(mapBrowserEvent) {\n    if (!mapBrowserEvent.originalEvent || !this.condition_(mapBrowserEvent)) {\n      return true;\n    }\n    //display pointer (if not dragging)\n    if (\n      mapBrowserEvent.type == MapBrowserEventType.POINTERMOVE &&\n      !this.handlingDownUpSequence\n    ) {\n      this.handlePointerMove_(mapBrowserEvent);\n    }\n    //call pointer to determine up/down/drag\n    super.handleEvent(mapBrowserEvent);\n    //return false to stop propagation\n    return false;\n  }\n\n  /**\n   * Handle pointer down events.\n   * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Event.\n   * @return {boolean} If the event was consumed.\n   */\n  handleDownEvent(mapBrowserEvent) {\n    const pixel = mapBrowserEvent.pixel;\n    const map = mapBrowserEvent.map;\n\n    const extent = this.getExtentInternal();\n    let vertex = this.snapToVertex_(pixel, map);\n\n    //find the extent corner opposite the passed corner\n    const getOpposingPoint = function (point) {\n      let x_ = null;\n      let y_ = null;\n      if (point[0] == extent[0]) {\n        x_ = extent[2];\n      } else if (point[0] == extent[2]) {\n        x_ = extent[0];\n      }\n      if (point[1] == extent[1]) {\n        y_ = extent[3];\n      } else if (point[1] == extent[3]) {\n        y_ = extent[1];\n      }\n      if (x_ !== null && y_ !== null) {\n        return [x_, y_];\n      }\n      return null;\n    };\n    if (vertex && extent) {\n      const x =\n        vertex[0] == extent[0] || vertex[0] == extent[2] ? vertex[0] : null;\n      const y =\n        vertex[1] == extent[1] || vertex[1] == extent[3] ? vertex[1] : null;\n\n      //snap to point\n      if (x !== null && y !== null) {\n        this.pointerHandler_ = getPointHandler(getOpposingPoint(vertex));\n        //snap to edge\n      } else if (x !== null) {\n        this.pointerHandler_ = getEdgeHandler(\n          getOpposingPoint([x, extent[1]]),\n          getOpposingPoint([x, extent[3]])\n        );\n      } else if (y !== null) {\n        this.pointerHandler_ = getEdgeHandler(\n          getOpposingPoint([extent[0], y]),\n          getOpposingPoint([extent[2], y])\n        );\n      }\n      //no snap - new bbox\n    } else {\n      vertex = map.getCoordinateFromPixelInternal(pixel);\n      this.setExtent([vertex[0], vertex[1], vertex[0], vertex[1]]);\n      this.pointerHandler_ = getPointHandler(vertex);\n    }\n    return true; //event handled; start downup sequence\n  }\n\n  /**\n   * Handle pointer drag events.\n   * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Event.\n   */\n  handleDragEvent(mapBrowserEvent) {\n    if (this.pointerHandler_) {\n      const pixelCoordinate = mapBrowserEvent.coordinate;\n      this.setExtent(this.pointerHandler_(pixelCoordinate));\n      this.createOrUpdatePointerFeature_(pixelCoordinate);\n    }\n  }\n\n  /**\n   * Handle pointer up events.\n   * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Event.\n   * @return {boolean} If the event was consumed.\n   */\n  handleUpEvent(mapBrowserEvent) {\n    this.pointerHandler_ = null;\n    //If bbox is zero area, set to null;\n    const extent = this.getExtentInternal();\n    if (!extent || getArea(extent) === 0) {\n      this.setExtent(null);\n    }\n    return false; //Stop handling downup sequence\n  }\n\n  /**\n   * Remove the interaction from its current map and attach it to the new map.\n   * Subclasses may set up event handlers to get notified about changes to\n   * the map here.\n   * @param {import(\"../Map.js\").default} map Map.\n   */\n  setMap(map) {\n    this.extentOverlay_.setMap(map);\n    this.vertexOverlay_.setMap(map);\n    super.setMap(map);\n  }\n\n  /**\n   * Returns the current drawn extent in the view projection (or user projection if set)\n   *\n   * @return {import(\"../extent.js\").Extent} Drawn extent in the view projection.\n   * @api\n   */\n  getExtent() {\n    return toUserExtent(\n      this.getExtentInternal(),\n      this.getMap().getView().getProjection()\n    );\n  }\n\n  /**\n   * Returns the current drawn extent in the view projection\n   *\n   * @return {import(\"../extent.js\").Extent} Drawn extent in the view projection.\n   * @api\n   */\n  getExtentInternal() {\n    return this.extent_;\n  }\n\n  /**\n   * Manually sets the drawn extent, using the view projection.\n   *\n   * @param {import(\"../extent.js\").Extent} extent Extent\n   * @api\n   */\n  setExtent(extent) {\n    //Null extent means no bbox\n    this.extent_ = extent ? extent : null;\n    this.createOrUpdateExtentFeature_(extent);\n    this.dispatchEvent(new ExtentEvent(this.extent_));\n  }\n}\n\n/**\n * Returns the default style for the drawn bbox\n *\n * @return {import(\"../style/Style.js\").StyleFunction} Default Extent style\n */\nfunction getDefaultExtentStyleFunction() {\n  const style = createEditingStyle();\n  return function (feature, resolution) {\n    return style['Polygon'];\n  };\n}\n\n/**\n * Returns the default style for the pointer\n *\n * @return {import(\"../style/Style.js\").StyleFunction} Default pointer style\n */\nfunction getDefaultPointerStyleFunction() {\n  const style = createEditingStyle();\n  return function (feature, resolution) {\n    return style['Point'];\n  };\n}\n\n/**\n * @param {import(\"../coordinate.js\").Coordinate} fixedPoint corner that will be unchanged in the new extent\n * @return {function (import(\"../coordinate.js\").Coordinate): import(\"../extent.js\").Extent} event handler\n */\nfunction getPointHandler(fixedPoint) {\n  return function (point) {\n    return boundingExtent([fixedPoint, point]);\n  };\n}\n\n/**\n * @param {import(\"../coordinate.js\").Coordinate} fixedP1 first corner that will be unchanged in the new extent\n * @param {import(\"../coordinate.js\").Coordinate} fixedP2 second corner that will be unchanged in the new extent\n * @return {function (import(\"../coordinate.js\").Coordinate): import(\"../extent.js\").Extent|null} event handler\n */\nfunction getEdgeHandler(fixedP1, fixedP2) {\n  if (fixedP1[0] == fixedP2[0]) {\n    return function (point) {\n      return boundingExtent([fixedP1, [point[0], fixedP2[1]]]);\n    };\n  }\n  if (fixedP1[1] == fixedP2[1]) {\n    return function (point) {\n      return boundingExtent([fixedP1, [fixedP2[0], point[1]]]);\n    };\n  }\n  return null;\n}\n\n/**\n * @param {import(\"../extent.js\").Extent} extent extent\n * @return {Array<Array<import(\"../coordinate.js\").Coordinate>>} extent line segments\n */\nfunction getSegments(extent) {\n  return [\n    [\n      [extent[0], extent[1]],\n      [extent[0], extent[3]],\n    ],\n    [\n      [extent[0], extent[3]],\n      [extent[2], extent[3]],\n    ],\n    [\n      [extent[2], extent[3]],\n      [extent[2], extent[1]],\n    ],\n    [\n      [extent[2], extent[1]],\n      [extent[0], extent[1]],\n    ],\n  ];\n}\n\nexport default Extent;\n","/**\n * @module ol/interaction/Link\n */\nimport EventType from '../events/EventType.js';\nimport Interaction from './Interaction.js';\nimport MapEventType from '../MapEventType.js';\nimport {listen, unlistenByKey} from '../events.js';\nimport {toFixed} from '../math.js';\n\n/**\n * @param {number} number A number.\n * @return {number} A number with at most 5 decimal places.\n */\nfunction to5(number) {\n  return toFixed(number, 5);\n}\n\n/**\n * @param {string} string A string.\n * @return {number} A number representing the string.\n */\nfunction readNumber(string) {\n  return parseFloat(string);\n}\n\n/**\n * @param {number} number A number.\n * @return {string} A string representing the number.\n */\nfunction writeNumber(number) {\n  return to5(number).toString();\n}\n\n/**\n * @param {number} a A number.\n * @param {number} b A number.\n * @return {boolean} The numbers are different.\n */\nfunction differentNumber(a, b) {\n  if (isNaN(a)) {\n    return false;\n  }\n  return a !== readNumber(writeNumber(b));\n}\n\n/**\n * @param {Array<number>} a An array of two numbers.\n * @param {Array<number>} b An array of two numbers.\n * @return {boolean} The arrays are different.\n */\nfunction differentArray(a, b) {\n  return differentNumber(a[0], b[0]) || differentNumber(a[1], b[1]);\n}\n\n/** @typedef {'x'|'y'|'z'|'r'|'l'} Params */\n\n/**\n * @typedef {Object} Options\n * @property {boolean|import('../View.js').AnimationOptions} [animate=true] Animate view transitions.\n * @property {Array<Params>} [params=['x', 'y', 'z', 'r', 'l']] Properties to track. Default is to track\n * `x` (center x), `y` (center y), `z` (zoom), `r` (rotation) and `l` (layers).\n * @property {boolean} [replace=false] Replace the current URL without creating the new entry in browser history.\n * By default, changes in the map state result in a new entry being added to the browser history.\n * @property {string} [prefix=''] By default, the URL will be updated with search parameters x, y, z, and r.  To\n * avoid collisions with existing search parameters that your application uses, you can supply a custom prefix for\n * the ones used by this interaction (e.g. 'ol:').\n */\n\n/**\n * @classdesc\n * An interaction that synchronizes the map state with the URL.\n *\n * @api\n */\nclass Link extends Interaction {\n  /**\n   * @param {Options} [options] Link options.\n   */\n  constructor(options) {\n    super();\n\n    options = Object.assign(\n      {\n        animate: true,\n        params: ['x', 'y', 'z', 'r', 'l'],\n        replace: false,\n        prefix: '',\n      },\n      options || {}\n    );\n\n    let animationOptions;\n    if (options.animate === true) {\n      animationOptions = {duration: 250};\n    } else if (!options.animate) {\n      animationOptions = null;\n    } else {\n      animationOptions = options.animate;\n    }\n\n    /**\n     * @type {import('../View.js').AnimationOptions|null}\n     * @private\n     */\n    this.animationOptions_ = animationOptions;\n\n    /**\n     * @type {Object<Params, boolean>}\n     * @private\n     */\n    this.params_ = options.params.reduce((acc, value) => {\n      acc[value] = true;\n      return acc;\n    }, {});\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.replace_ = options.replace;\n\n    /**\n     * @private\n     * @type {string}\n     */\n    this.prefix_ = options.prefix;\n\n    /**\n     * @private\n     * @type {!Array<import(\"../events.js\").EventsKey>}\n     */\n    this.listenerKeys_ = [];\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.initial_ = true;\n\n    this.updateState_ = this.updateState_.bind(this);\n  }\n\n  /**\n   * @private\n   * @param {string} name A parameter name.\n   * @return {string} A name with the prefix applied.\n   */\n  getParamName_(name) {\n    if (!this.prefix_) {\n      return name;\n    }\n    return this.prefix_ + name;\n  }\n\n  /**\n   * @private\n   * @param {URLSearchParams} params The search params.\n   * @param {string} name The unprefixed parameter name.\n   * @return {string|null} The parameter value.\n   */\n  get_(params, name) {\n    return params.get(this.getParamName_(name));\n  }\n\n  /**\n   * @private\n   * @param {URLSearchParams} params The search params.\n   * @param {string} name The unprefixed parameter name.\n   * @param {string} value The param value.\n   */\n  set_(params, name, value) {\n    if (!(name in this.params_)) {\n      return;\n    }\n    params.set(this.getParamName_(name), value);\n  }\n\n  /**\n   * @private\n   * @param {URLSearchParams} params The search params.\n   * @param {string} name The unprefixed parameter name.\n   */\n  delete_(params, name) {\n    if (!(name in this.params_)) {\n      return;\n    }\n    params.delete(this.getParamName_(name));\n  }\n\n  /**\n   * @param {import(\"../Map.js\").default|null} map Map.\n   */\n  setMap(map) {\n    const oldMap = this.getMap();\n    super.setMap(map);\n    if (map === oldMap) {\n      return;\n    }\n    if (oldMap) {\n      this.unregisterListeners_(oldMap);\n    }\n    if (map) {\n      this.initial_ = true;\n      this.updateState_();\n      this.registerListeners_(map);\n    }\n  }\n\n  /**\n   * @param {import(\"../Map.js\").default} map Map.\n   * @private\n   */\n  registerListeners_(map) {\n    this.listenerKeys_.push(\n      listen(map, MapEventType.MOVEEND, this.updateUrl_, this),\n      listen(map.getLayerGroup(), EventType.CHANGE, this.updateUrl_, this),\n      listen(map, 'change:layergroup', this.handleChangeLayerGroup_, this)\n    );\n\n    if (!this.replace_) {\n      addEventListener('popstate', this.updateState_);\n    }\n  }\n\n  /**\n   * @param {import(\"../Map.js\").default} map Map.\n   * @private\n   */\n  unregisterListeners_(map) {\n    for (let i = 0, ii = this.listenerKeys_.length; i < ii; ++i) {\n      unlistenByKey(this.listenerKeys_[i]);\n    }\n    this.listenerKeys_.length = 0;\n\n    if (!this.replace_) {\n      removeEventListener('popstate', this.updateState_);\n    }\n\n    const url = new URL(window.location.href);\n    const params = url.searchParams;\n    this.delete_(params, 'x');\n    this.delete_(params, 'y');\n    this.delete_(params, 'z');\n    this.delete_(params, 'r');\n    this.delete_(params, 'l');\n    window.history.replaceState(null, '', url);\n  }\n\n  /**\n   * @private\n   */\n  handleChangeLayerGroup_() {\n    const map = this.getMap();\n    if (!map) {\n      return;\n    }\n    this.unregisterListeners_(map);\n    this.registerListeners_(map);\n    this.initial_ = true;\n    this.updateUrl_();\n  }\n\n  /**\n   * @private\n   */\n  updateState_() {\n    const map = this.getMap();\n    if (!map) {\n      return;\n    }\n    const view = map.getView();\n    if (!view) {\n      return;\n    }\n    const url = new URL(window.location.href);\n    const params = url.searchParams;\n\n    let updateView = false;\n\n    /**\n     * @type {import('../View.js').AnimationOptions}\n     */\n    const viewProperties = {};\n\n    const zoom = readNumber(this.get_(params, 'z'));\n    if ('z' in this.params_ && differentNumber(zoom, view.getZoom())) {\n      updateView = true;\n      viewProperties.zoom = zoom;\n    }\n\n    const rotation = readNumber(this.get_(params, 'r'));\n    if ('r' in this.params_ && differentNumber(rotation, view.getRotation())) {\n      updateView = true;\n      viewProperties.rotation = rotation;\n    }\n\n    const center = [\n      readNumber(this.get_(params, 'x')),\n      readNumber(this.get_(params, 'y')),\n    ];\n    if (\n      ('x' in this.params_ || 'y' in this.params_) &&\n      differentArray(center, view.getCenter())\n    ) {\n      updateView = true;\n      viewProperties.center = center;\n    }\n\n    if (updateView) {\n      if (!this.initial_ && this.animationOptions_) {\n        view.animate(Object.assign(viewProperties, this.animationOptions_));\n      } else {\n        if (viewProperties.center) {\n          view.setCenter(viewProperties.center);\n        }\n        if ('zoom' in viewProperties) {\n          view.setZoom(viewProperties.zoom);\n        }\n        if ('rotation' in viewProperties) {\n          view.setRotation(viewProperties.rotation);\n        }\n      }\n    }\n\n    const layers = map.getAllLayers();\n    const layersParam = this.get_(params, 'l');\n    if (\n      'l' in this.params_ &&\n      layersParam &&\n      layersParam.length === layers.length\n    ) {\n      for (let i = 0, ii = layers.length; i < ii; ++i) {\n        const value = parseInt(layersParam[i]);\n        if (!isNaN(value)) {\n          const visible = Boolean(value);\n          const layer = layers[i];\n          if (layer.getVisible() !== visible) {\n            layer.setVisible(visible);\n          }\n        }\n      }\n    }\n  }\n\n  /**\n   * @private\n   */\n  updateUrl_() {\n    const map = this.getMap();\n    if (!map) {\n      return;\n    }\n    const view = map.getView();\n    if (!view) {\n      return;\n    }\n    const initial = this.initial_;\n    this.initial_ = false;\n\n    const center = view.getCenter();\n    const zoom = view.getZoom();\n    const rotation = view.getRotation();\n\n    const layers = map.getAllLayers();\n    const visibilities = new Array(layers.length);\n    for (let i = 0, ii = layers.length; i < ii; ++i) {\n      visibilities[i] = layers[i].getVisible() ? '1' : '0';\n    }\n\n    const url = new URL(window.location.href);\n    const params = url.searchParams;\n\n    this.set_(params, 'x', writeNumber(center[0]));\n    this.set_(params, 'y', writeNumber(center[1]));\n    this.set_(params, 'z', writeNumber(zoom));\n    this.set_(params, 'r', writeNumber(rotation));\n    this.set_(params, 'l', visibilities.join(''));\n\n    if (url.href !== window.location.href) {\n      if (initial || this.replace_) {\n        window.history.replaceState(history.state, '', url);\n      } else {\n        window.history.pushState(null, '', url);\n      }\n    }\n  }\n}\n\nexport default Link;\n","/**\n * @module ol/interaction/Modify\n */\nimport Collection from '../Collection.js';\nimport CollectionEventType from '../CollectionEventType.js';\nimport Event from '../events/Event.js';\nimport EventType from '../events/EventType.js';\nimport Feature from '../Feature.js';\nimport MapBrowserEventType from '../MapBrowserEventType.js';\nimport Point from '../geom/Point.js';\nimport PointerInteraction from './Pointer.js';\nimport RBush from '../structs/RBush.js';\nimport VectorEventType from '../source/VectorEventType.js';\nimport VectorLayer from '../layer/Vector.js';\nimport VectorSource from '../source/Vector.js';\nimport {\n  altKeyOnly,\n  always,\n  primaryAction,\n  singleClick,\n} from '../events/condition.js';\nimport {\n  boundingExtent,\n  buffer as bufferExtent,\n  createOrUpdateFromCoordinate as createExtent,\n} from '../extent.js';\nimport {\n  closestOnSegment,\n  distance as coordinateDistance,\n  equals as coordinatesEqual,\n  squaredDistance as squaredCoordinateDistance,\n  squaredDistanceToSegment,\n} from '../coordinate.js';\nimport {createEditingStyle} from '../style/Style.js';\nimport {equals} from '../array.js';\nimport {fromCircle} from '../geom/Polygon.js';\nimport {\n  fromUserCoordinate,\n  fromUserExtent,\n  getUserProjection,\n  toUserCoordinate,\n  toUserExtent,\n} from '../proj.js';\nimport {getUid} from '../util.js';\n\n/**\n * The segment index assigned to a circle's center when\n * breaking up a circle into ModifySegmentDataType segments.\n * @type {number}\n */\nconst CIRCLE_CENTER_INDEX = 0;\n\n/**\n * The segment index assigned to a circle's circumference when\n * breaking up a circle into ModifySegmentDataType segments.\n * @type {number}\n */\nconst CIRCLE_CIRCUMFERENCE_INDEX = 1;\n\nconst tempExtent = [0, 0, 0, 0];\nconst tempSegment = [];\n\n/**\n * @enum {string}\n */\nconst ModifyEventType = {\n  /**\n   * Triggered upon feature modification start\n   * @event ModifyEvent#modifystart\n   * @api\n   */\n  MODIFYSTART: 'modifystart',\n  /**\n   * Triggered upon feature modification end\n   * @event ModifyEvent#modifyend\n   * @api\n   */\n  MODIFYEND: 'modifyend',\n};\n\n/**\n * @typedef {Object} SegmentData\n * @property {Array<number>} [depth] Depth.\n * @property {Feature} feature Feature.\n * @property {import(\"../geom/SimpleGeometry.js\").default} geometry Geometry.\n * @property {number} [index] Index.\n * @property {Array<Array<number>>} segment Segment.\n * @property {Array<SegmentData>} [featureSegments] FeatureSegments.\n */\n\n/**\n * @typedef {Object} Options\n * @property {import(\"../events/condition.js\").Condition} [condition] A function that\n * takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a\n * boolean to indicate whether that event will be considered to add or move a\n * vertex to the sketch. Default is\n * {@link module:ol/events/condition.primaryAction}.\n * @property {import(\"../events/condition.js\").Condition} [deleteCondition] A function\n * that takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a\n * boolean to indicate whether that event should be handled. By default,\n * {@link module:ol/events/condition.singleClick} with\n * {@link module:ol/events/condition.altKeyOnly} results in a vertex deletion.\n * @property {import(\"../events/condition.js\").Condition} [insertVertexCondition] A\n * function that takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and\n * returns a boolean to indicate whether a new vertex should be added to the sketch\n * features. Default is {@link module:ol/events/condition.always}.\n * @property {number} [pixelTolerance=10] Pixel tolerance for considering the\n * pointer close enough to a segment or vertex for editing.\n * @property {import(\"../style/Style.js\").StyleLike|import(\"../style/flat.js\").FlatStyleLike} [style]\n * Style used for the modification point or vertex. For linestrings and polygons, this will\n * be the affected vertex, for circles a point along the circle, and for points the actual\n * point. If not configured, the default edit style is used (see {@link module:ol/style/Style~Style}).\n * When using a style function, the point feature passed to the function will have a `features`\n * property - an array whose entries are the features that are being modified, and a `geometries`\n * property - an array whose entries are the geometries that are being modified. Both arrays are\n * in the same order. The `geometries` are only useful when modifying geometry collections, where\n * the geometry will be the particular geometry from the collection that is being modified.\n * @property {VectorSource} [source] The vector source with\n * features to modify.  If a vector source is not provided, a feature collection\n * must be provided with the `features` option.\n * @property {boolean|import(\"../layer/BaseVector\").default} [hitDetection] When configured, point\n * features will be considered for modification based on their visual appearance, instead of being within\n * the `pixelTolerance` from the pointer location. When a {@link module:ol/layer/BaseVector~BaseVectorLayer} is\n * provided, only the rendered representation of the features on that layer will be considered.\n * @property {Collection<Feature>} [features]\n * The features the interaction works on.  If a feature collection is not\n * provided, a vector source must be provided with the `source` option.\n * @property {boolean} [wrapX=false] Wrap the world horizontally on the sketch\n * overlay.\n * @property {boolean} [snapToPointer=!hitDetection] The vertex, point or segment being modified snaps to the\n * pointer coordinate when clicked within the `pixelTolerance`.\n */\n\n/**\n * @classdesc\n * Events emitted by {@link module:ol/interaction/Modify~Modify} instances are\n * instances of this type.\n */\nexport class ModifyEvent extends Event {\n  /**\n   * @param {ModifyEventType} type Type.\n   * @param {Collection<Feature>} features\n   * The features modified.\n   * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent\n   * Associated {@link module:ol/MapBrowserEvent~MapBrowserEvent}.\n   */\n  constructor(type, features, mapBrowserEvent) {\n    super(type);\n\n    /**\n     * The features being modified.\n     * @type {Collection<Feature>}\n     * @api\n     */\n    this.features = features;\n\n    /**\n     * Associated {@link module:ol/MapBrowserEvent~MapBrowserEvent}.\n     * @type {import(\"../MapBrowserEvent.js\").default}\n     * @api\n     */\n    this.mapBrowserEvent = mapBrowserEvent;\n  }\n}\n\n/***\n * @template Return\n * @typedef {import(\"../Observable\").OnSignature<import(\"../Observable\").EventTypes, import(\"../events/Event.js\").default, Return> &\n *   import(\"../Observable\").OnSignature<import(\"../ObjectEventType\").Types|\n *     'change:active', import(\"../Object\").ObjectEvent, Return> &\n *   import(\"../Observable\").OnSignature<'modifyend'|'modifystart', ModifyEvent, Return> &\n *   import(\"../Observable\").CombinedOnSignature<import(\"../Observable\").EventTypes|import(\"../ObjectEventType\").Types|\n *     'change:active'|'modifyend'|'modifystart', Return>} ModifyOnSignature\n */\n\n/**\n * @classdesc\n * Interaction for modifying feature geometries.  To modify features that have\n * been added to an existing source, construct the modify interaction with the\n * `source` option.  If you want to modify features in a collection (for example,\n * the collection used by a select interaction), construct the interaction with\n * the `features` option.  The interaction must be constructed with either a\n * `source` or `features` option.\n *\n * Cartesian distance from the pointer is used to determine the features that\n * will be modified. This means that geometries will only be considered for\n * modification when they are within the configured `pixelTolerance`. For point\n * geometries, the `hitDetection` option can be used to match their visual\n * appearance.\n *\n * By default, the interaction will allow deletion of vertices when the `alt`\n * key is pressed.  To configure the interaction with a different condition\n * for deletion, use the `deleteCondition` option.\n * @fires ModifyEvent\n * @api\n */\nclass Modify extends PointerInteraction {\n  /**\n   * @param {Options} options Options.\n   */\n  constructor(options) {\n    super(/** @type {import(\"./Pointer.js\").Options} */ (options));\n\n    /***\n     * @type {ModifyOnSignature<import(\"../events\").EventsKey>}\n     */\n    this.on;\n\n    /***\n     * @type {ModifyOnSignature<import(\"../events\").EventsKey>}\n     */\n    this.once;\n\n    /***\n     * @type {ModifyOnSignature<void>}\n     */\n    this.un;\n\n    /** @private */\n    this.boundHandleFeatureChange_ = this.handleFeatureChange_.bind(this);\n\n    /**\n     * @private\n     * @type {import(\"../events/condition.js\").Condition}\n     */\n    this.condition_ = options.condition ? options.condition : primaryAction;\n\n    /**\n     * @private\n     * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Browser event.\n     * @return {boolean} Combined condition result.\n     */\n    this.defaultDeleteCondition_ = function (mapBrowserEvent) {\n      return altKeyOnly(mapBrowserEvent) && singleClick(mapBrowserEvent);\n    };\n\n    /**\n     * @type {import(\"../events/condition.js\").Condition}\n     * @private\n     */\n    this.deleteCondition_ = options.deleteCondition\n      ? options.deleteCondition\n      : this.defaultDeleteCondition_;\n\n    /**\n     * @type {import(\"../events/condition.js\").Condition}\n     * @private\n     */\n    this.insertVertexCondition_ = options.insertVertexCondition\n      ? options.insertVertexCondition\n      : always;\n\n    /**\n     * Editing vertex.\n     * @type {Feature<Point>}\n     * @private\n     */\n    this.vertexFeature_ = null;\n\n    /**\n     * Segments intersecting {@link this.vertexFeature_} by segment uid.\n     * @type {Object<string, boolean>}\n     * @private\n     */\n    this.vertexSegments_ = null;\n\n    /**\n     * @type {import(\"../pixel.js\").Pixel}\n     * @private\n     */\n    this.lastPixel_ = [0, 0];\n\n    /**\n     * Tracks if the next `singleclick` event should be ignored to prevent\n     * accidental deletion right after vertex creation.\n     * @type {boolean}\n     * @private\n     */\n    this.ignoreNextSingleClick_ = false;\n\n    /**\n     * @type {Collection<Feature>}\n     * @private\n     */\n    this.featuresBeingModified_ = null;\n\n    /**\n     * Segment RTree for each layer\n     * @type {RBush<SegmentData>}\n     * @private\n     */\n    this.rBush_ = new RBush();\n\n    /**\n     * @type {number}\n     * @private\n     */\n    this.pixelTolerance_ =\n      options.pixelTolerance !== undefined ? options.pixelTolerance : 10;\n\n    /**\n     * @type {boolean}\n     * @private\n     */\n    this.snappedToVertex_ = false;\n\n    /**\n     * Indicate whether the interaction is currently changing a feature's\n     * coordinates.\n     * @type {boolean}\n     * @private\n     */\n    this.changingFeature_ = false;\n\n    /**\n     * @type {Array}\n     * @private\n     */\n    this.dragSegments_ = [];\n\n    /**\n     * Draw overlay where sketch features are drawn.\n     * @type {VectorLayer}\n     * @private\n     */\n    this.overlay_ = new VectorLayer({\n      source: new VectorSource({\n        useSpatialIndex: false,\n        wrapX: !!options.wrapX,\n      }),\n      style: options.style ? options.style : getDefaultStyleFunction(),\n      updateWhileAnimating: true,\n      updateWhileInteracting: true,\n    });\n\n    /**\n     * @const\n     * @private\n     * @type {!Object<string, function(Feature, import(\"../geom/Geometry.js\").default): void>}\n     */\n    this.SEGMENT_WRITERS_ = {\n      'Point': this.writePointGeometry_.bind(this),\n      'LineString': this.writeLineStringGeometry_.bind(this),\n      'LinearRing': this.writeLineStringGeometry_.bind(this),\n      'Polygon': this.writePolygonGeometry_.bind(this),\n      'MultiPoint': this.writeMultiPointGeometry_.bind(this),\n      'MultiLineString': this.writeMultiLineStringGeometry_.bind(this),\n      'MultiPolygon': this.writeMultiPolygonGeometry_.bind(this),\n      'Circle': this.writeCircleGeometry_.bind(this),\n      'GeometryCollection': this.writeGeometryCollectionGeometry_.bind(this),\n    };\n\n    /**\n     * @type {VectorSource}\n     * @private\n     */\n    this.source_ = null;\n\n    /**\n     * @type {boolean|import(\"../layer/BaseVector\").default}\n     */\n    this.hitDetection_ = null;\n\n    /** @type {Collection<Feature>} */\n    let features;\n    if (options.features) {\n      features = options.features;\n    } else if (options.source) {\n      this.source_ = options.source;\n      features = new Collection(this.source_.getFeatures());\n      this.source_.addEventListener(\n        VectorEventType.ADDFEATURE,\n        this.handleSourceAdd_.bind(this)\n      );\n      this.source_.addEventListener(\n        VectorEventType.REMOVEFEATURE,\n        this.handleSourceRemove_.bind(this)\n      );\n    }\n    if (!features) {\n      throw new Error(\n        'The modify interaction requires features, a source or a layer'\n      );\n    }\n    if (options.hitDetection) {\n      this.hitDetection_ = options.hitDetection;\n    }\n\n    /**\n     * @type {Collection<Feature>}\n     * @private\n     */\n    this.features_ = features;\n\n    this.features_.forEach(this.addFeature_.bind(this));\n    this.features_.addEventListener(\n      CollectionEventType.ADD,\n      this.handleFeatureAdd_.bind(this)\n    );\n    this.features_.addEventListener(\n      CollectionEventType.REMOVE,\n      this.handleFeatureRemove_.bind(this)\n    );\n\n    /**\n     * @type {import(\"../MapBrowserEvent.js\").default}\n     * @private\n     */\n    this.lastPointerEvent_ = null;\n\n    /**\n     * Delta (x, y in map units) between matched rtree vertex and pointer vertex.\n     * @type {Array<number>}\n     */\n    this.delta_ = [0, 0];\n\n    /**\n     * @private\n     */\n    this.snapToPointer_ =\n      options.snapToPointer === undefined\n        ? !this.hitDetection_\n        : options.snapToPointer;\n  }\n\n  /**\n   * @param {Feature} feature Feature.\n   * @private\n   */\n  addFeature_(feature) {\n    const geometry = feature.getGeometry();\n    if (geometry) {\n      const writer = this.SEGMENT_WRITERS_[geometry.getType()];\n      if (writer) {\n        writer(feature, geometry);\n      }\n    }\n    const map = this.getMap();\n    if (map && map.isRendered() && this.getActive()) {\n      this.handlePointerAtPixel_(this.lastPixel_, map);\n    }\n    feature.addEventListener(EventType.CHANGE, this.boundHandleFeatureChange_);\n  }\n\n  /**\n   * @param {import(\"../MapBrowserEvent.js\").default} evt Map browser event.\n   * @param {Array<Array<SegmentData>>} segments The segments subject to modification.\n   * @private\n   */\n  willModifyFeatures_(evt, segments) {\n    if (!this.featuresBeingModified_) {\n      this.featuresBeingModified_ = new Collection();\n      const features = this.featuresBeingModified_.getArray();\n      for (let i = 0, ii = segments.length; i < ii; ++i) {\n        const segment = segments[i];\n        for (let s = 0, ss = segment.length; s < ss; ++s) {\n          const feature = segment[s].feature;\n          if (feature && !features.includes(feature)) {\n            this.featuresBeingModified_.push(feature);\n          }\n        }\n      }\n      if (this.featuresBeingModified_.getLength() === 0) {\n        this.featuresBeingModified_ = null;\n      } else {\n        this.dispatchEvent(\n          new ModifyEvent(\n            ModifyEventType.MODIFYSTART,\n            this.featuresBeingModified_,\n            evt\n          )\n        );\n      }\n    }\n  }\n\n  /**\n   * @param {Feature} feature Feature.\n   * @private\n   */\n  removeFeature_(feature) {\n    this.removeFeatureSegmentData_(feature);\n    // Remove the vertex feature if the collection of candidate features is empty.\n    if (this.vertexFeature_ && this.features_.getLength() === 0) {\n      this.overlay_.getSource().removeFeature(this.vertexFeature_);\n      this.vertexFeature_ = null;\n    }\n    feature.removeEventListener(\n      EventType.CHANGE,\n      this.boundHandleFeatureChange_\n    );\n  }\n\n  /**\n   * @param {Feature} feature Feature.\n   * @private\n   */\n  removeFeatureSegmentData_(feature) {\n    const rBush = this.rBush_;\n    /** @type {Array<SegmentData>} */\n    const nodesToRemove = [];\n    rBush.forEach(\n      /**\n       * @param {SegmentData} node RTree node.\n       */\n      function (node) {\n        if (feature === node.feature) {\n          nodesToRemove.push(node);\n        }\n      }\n    );\n    for (let i = nodesToRemove.length - 1; i >= 0; --i) {\n      const nodeToRemove = nodesToRemove[i];\n      for (let j = this.dragSegments_.length - 1; j >= 0; --j) {\n        if (this.dragSegments_[j][0] === nodeToRemove) {\n          this.dragSegments_.splice(j, 1);\n        }\n      }\n      rBush.remove(nodeToRemove);\n    }\n  }\n\n  /**\n   * Activate or deactivate the interaction.\n   * @param {boolean} active Active.\n   * @observable\n   * @api\n   */\n  setActive(active) {\n    if (this.vertexFeature_ && !active) {\n      this.overlay_.getSource().removeFeature(this.vertexFeature_);\n      this.vertexFeature_ = null;\n    }\n    super.setActive(active);\n  }\n\n  /**\n   * Remove the interaction from its current map and attach it to the new map.\n   * Subclasses may set up event handlers to get notified about changes to\n   * the map here.\n   * @param {import(\"../Map.js\").default} map Map.\n   */\n  setMap(map) {\n    this.overlay_.setMap(map);\n    super.setMap(map);\n  }\n\n  /**\n   * Get the overlay layer that this interaction renders the modification point or vertex to.\n   * @return {VectorLayer} Overlay layer.\n   * @api\n   */\n  getOverlay() {\n    return this.overlay_;\n  }\n\n  /**\n   * @param {import(\"../source/Vector.js\").VectorSourceEvent} event Event.\n   * @private\n   */\n  handleSourceAdd_(event) {\n    if (event.feature) {\n      this.features_.push(event.feature);\n    }\n  }\n\n  /**\n   * @param {import(\"../source/Vector.js\").VectorSourceEvent} event Event.\n   * @private\n   */\n  handleSourceRemove_(event) {\n    if (event.feature) {\n      this.features_.remove(event.feature);\n    }\n  }\n\n  /**\n   * @param {import(\"../Collection.js\").CollectionEvent<Feature>} evt Event.\n   * @private\n   */\n  handleFeatureAdd_(evt) {\n    this.addFeature_(evt.element);\n  }\n\n  /**\n   * @param {import(\"../events/Event.js\").default} evt Event.\n   * @private\n   */\n  handleFeatureChange_(evt) {\n    if (!this.changingFeature_) {\n      const feature = /** @type {Feature} */ (evt.target);\n      this.removeFeature_(feature);\n      this.addFeature_(feature);\n    }\n  }\n\n  /**\n   * @param {import(\"../Collection.js\").CollectionEvent<Feature>} evt Event.\n   * @private\n   */\n  handleFeatureRemove_(evt) {\n    this.removeFeature_(evt.element);\n  }\n\n  /**\n   * @param {Feature} feature Feature\n   * @param {Point} geometry Geometry.\n   * @private\n   */\n  writePointGeometry_(feature, geometry) {\n    const coordinates = geometry.getCoordinates();\n\n    /** @type {SegmentData} */\n    const segmentData = {\n      feature: feature,\n      geometry: geometry,\n      segment: [coordinates, coordinates],\n    };\n\n    this.rBush_.insert(geometry.getExtent(), segmentData);\n  }\n\n  /**\n   * @param {Feature} feature Feature\n   * @param {import(\"../geom/MultiPoint.js\").default} geometry Geometry.\n   * @private\n   */\n  writeMultiPointGeometry_(feature, geometry) {\n    const points = geometry.getCoordinates();\n    for (let i = 0, ii = points.length; i < ii; ++i) {\n      const coordinates = points[i];\n\n      /** @type {SegmentData} */\n      const segmentData = {\n        feature: feature,\n        geometry: geometry,\n        depth: [i],\n        index: i,\n        segment: [coordinates, coordinates],\n      };\n\n      this.rBush_.insert(geometry.getExtent(), segmentData);\n    }\n  }\n\n  /**\n   * @param {Feature} feature Feature\n   * @param {import(\"../geom/LineString.js\").default} geometry Geometry.\n   * @private\n   */\n  writeLineStringGeometry_(feature, geometry) {\n    const coordinates = geometry.getCoordinates();\n    for (let i = 0, ii = coordinates.length - 1; i < ii; ++i) {\n      const segment = coordinates.slice(i, i + 2);\n\n      /** @type {SegmentData} */\n      const segmentData = {\n        feature: feature,\n        geometry: geometry,\n        index: i,\n        segment: segment,\n      };\n\n      this.rBush_.insert(boundingExtent(segment), segmentData);\n    }\n  }\n\n  /**\n   * @param {Feature} feature Feature\n   * @param {import(\"../geom/MultiLineString.js\").default} geometry Geometry.\n   * @private\n   */\n  writeMultiLineStringGeometry_(feature, geometry) {\n    const lines = geometry.getCoordinates();\n    for (let j = 0, jj = lines.length; j < jj; ++j) {\n      const coordinates = lines[j];\n      for (let i = 0, ii = coordinates.length - 1; i < ii; ++i) {\n        const segment = coordinates.slice(i, i + 2);\n\n        /** @type {SegmentData} */\n        const segmentData = {\n          feature: feature,\n          geometry: geometry,\n          depth: [j],\n          index: i,\n          segment: segment,\n        };\n\n        this.rBush_.insert(boundingExtent(segment), segmentData);\n      }\n    }\n  }\n\n  /**\n   * @param {Feature} feature Feature\n   * @param {import(\"../geom/Polygon.js\").default} geometry Geometry.\n   * @private\n   */\n  writePolygonGeometry_(feature, geometry) {\n    const rings = geometry.getCoordinates();\n    for (let j = 0, jj = rings.length; j < jj; ++j) {\n      const coordinates = rings[j];\n      for (let i = 0, ii = coordinates.length - 1; i < ii; ++i) {\n        const segment = coordinates.slice(i, i + 2);\n\n        /** @type {SegmentData} */\n        const segmentData = {\n          feature: feature,\n          geometry: geometry,\n          depth: [j],\n          index: i,\n          segment: segment,\n        };\n\n        this.rBush_.insert(boundingExtent(segment), segmentData);\n      }\n    }\n  }\n\n  /**\n   * @param {Feature} feature Feature\n   * @param {import(\"../geom/MultiPolygon.js\").default} geometry Geometry.\n   * @private\n   */\n  writeMultiPolygonGeometry_(feature, geometry) {\n    const polygons = geometry.getCoordinates();\n    for (let k = 0, kk = polygons.length; k < kk; ++k) {\n      const rings = polygons[k];\n      for (let j = 0, jj = rings.length; j < jj; ++j) {\n        const coordinates = rings[j];\n        for (let i = 0, ii = coordinates.length - 1; i < ii; ++i) {\n          const segment = coordinates.slice(i, i + 2);\n\n          /** @type {SegmentData} */\n          const segmentData = {\n            feature: feature,\n            geometry: geometry,\n            depth: [j, k],\n            index: i,\n            segment: segment,\n          };\n\n          this.rBush_.insert(boundingExtent(segment), segmentData);\n        }\n      }\n    }\n  }\n\n  /**\n   * We convert a circle into two segments.  The segment at index\n   * {@link CIRCLE_CENTER_INDEX} is the\n   * circle's center (a point).  The segment at index\n   * {@link CIRCLE_CIRCUMFERENCE_INDEX} is\n   * the circumference, and is not a line segment.\n   *\n   * @param {Feature} feature Feature.\n   * @param {import(\"../geom/Circle.js\").default} geometry Geometry.\n   * @private\n   */\n  writeCircleGeometry_(feature, geometry) {\n    const coordinates = geometry.getCenter();\n\n    /** @type {SegmentData} */\n    const centerSegmentData = {\n      feature: feature,\n      geometry: geometry,\n      index: CIRCLE_CENTER_INDEX,\n      segment: [coordinates, coordinates],\n    };\n\n    /** @type {SegmentData} */\n    const circumferenceSegmentData = {\n      feature: feature,\n      geometry: geometry,\n      index: CIRCLE_CIRCUMFERENCE_INDEX,\n      segment: [coordinates, coordinates],\n    };\n\n    const featureSegments = [centerSegmentData, circumferenceSegmentData];\n    centerSegmentData.featureSegments = featureSegments;\n    circumferenceSegmentData.featureSegments = featureSegments;\n    this.rBush_.insert(createExtent(coordinates), centerSegmentData);\n    let circleGeometry = /** @type {import(\"../geom/Geometry.js\").default} */ (\n      geometry\n    );\n    const userProjection = getUserProjection();\n    if (userProjection && this.getMap()) {\n      const projection = this.getMap().getView().getProjection();\n      circleGeometry = circleGeometry\n        .clone()\n        .transform(userProjection, projection);\n      circleGeometry = fromCircle(\n        /** @type {import(\"../geom/Circle.js\").default} */ (circleGeometry)\n      ).transform(projection, userProjection);\n    }\n    this.rBush_.insert(circleGeometry.getExtent(), circumferenceSegmentData);\n  }\n\n  /**\n   * @param {Feature} feature Feature\n   * @param {import(\"../geom/GeometryCollection.js\").default} geometry Geometry.\n   * @private\n   */\n  writeGeometryCollectionGeometry_(feature, geometry) {\n    const geometries = geometry.getGeometriesArray();\n    for (let i = 0; i < geometries.length; ++i) {\n      const geometry = geometries[i];\n      const writer = this.SEGMENT_WRITERS_[geometry.getType()];\n      writer(feature, geometry);\n    }\n  }\n\n  /**\n   * @param {import(\"../coordinate.js\").Coordinate} coordinates Coordinates.\n   * @param {Array<Feature>} features The features being modified.\n   * @param {Array<import(\"../geom/SimpleGeometry.js\").default>} geometries The geometries being modified.\n   * @return {Feature} Vertex feature.\n   * @private\n   */\n  createOrUpdateVertexFeature_(coordinates, features, geometries) {\n    let vertexFeature = this.vertexFeature_;\n    if (!vertexFeature) {\n      vertexFeature = new Feature(new Point(coordinates));\n      this.vertexFeature_ = vertexFeature;\n      this.overlay_.getSource().addFeature(vertexFeature);\n    } else {\n      const geometry = vertexFeature.getGeometry();\n      geometry.setCoordinates(coordinates);\n    }\n    vertexFeature.set('features', features);\n    vertexFeature.set('geometries', geometries);\n    return vertexFeature;\n  }\n\n  /**\n   * Handles the {@link module:ol/MapBrowserEvent~MapBrowserEvent map browser event} and may modify the geometry.\n   * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n   * @return {boolean} `false` to stop event propagation.\n   */\n  handleEvent(mapBrowserEvent) {\n    if (!mapBrowserEvent.originalEvent) {\n      return true;\n    }\n    this.lastPointerEvent_ = mapBrowserEvent;\n\n    let handled;\n    if (\n      !mapBrowserEvent.map.getView().getInteracting() &&\n      mapBrowserEvent.type == MapBrowserEventType.POINTERMOVE &&\n      !this.handlingDownUpSequence\n    ) {\n      this.handlePointerMove_(mapBrowserEvent);\n    }\n    if (this.vertexFeature_ && this.deleteCondition_(mapBrowserEvent)) {\n      if (\n        mapBrowserEvent.type != MapBrowserEventType.SINGLECLICK ||\n        !this.ignoreNextSingleClick_\n      ) {\n        handled = this.removePoint();\n      } else {\n        handled = true;\n      }\n    }\n\n    if (mapBrowserEvent.type == MapBrowserEventType.SINGLECLICK) {\n      this.ignoreNextSingleClick_ = false;\n    }\n\n    return super.handleEvent(mapBrowserEvent) && !handled;\n  }\n\n  /**\n   * Handle pointer drag events.\n   * @param {import(\"../MapBrowserEvent.js\").default} evt Event.\n   */\n  handleDragEvent(evt) {\n    this.ignoreNextSingleClick_ = false;\n    this.willModifyFeatures_(evt, this.dragSegments_);\n\n    const vertex = [\n      evt.coordinate[0] + this.delta_[0],\n      evt.coordinate[1] + this.delta_[1],\n    ];\n    const features = [];\n    const geometries = [];\n    for (let i = 0, ii = this.dragSegments_.length; i < ii; ++i) {\n      const dragSegment = this.dragSegments_[i];\n      const segmentData = dragSegment[0];\n      const feature = segmentData.feature;\n      if (!features.includes(feature)) {\n        features.push(feature);\n      }\n      const geometry = segmentData.geometry;\n      if (!geometries.includes(geometry)) {\n        geometries.push(geometry);\n      }\n      const depth = segmentData.depth;\n      let coordinates;\n      const segment = segmentData.segment;\n      const index = dragSegment[1];\n\n      while (vertex.length < geometry.getStride()) {\n        vertex.push(segment[index][vertex.length]);\n      }\n\n      switch (geometry.getType()) {\n        case 'Point':\n          coordinates = vertex;\n          segment[0] = vertex;\n          segment[1] = vertex;\n          break;\n        case 'MultiPoint':\n          coordinates = geometry.getCoordinates();\n          coordinates[segmentData.index] = vertex;\n          segment[0] = vertex;\n          segment[1] = vertex;\n          break;\n        case 'LineString':\n          coordinates = geometry.getCoordinates();\n          coordinates[segmentData.index + index] = vertex;\n          segment[index] = vertex;\n          break;\n        case 'MultiLineString':\n          coordinates = geometry.getCoordinates();\n          coordinates[depth[0]][segmentData.index + index] = vertex;\n          segment[index] = vertex;\n          break;\n        case 'Polygon':\n          coordinates = geometry.getCoordinates();\n          coordinates[depth[0]][segmentData.index + index] = vertex;\n          segment[index] = vertex;\n          break;\n        case 'MultiPolygon':\n          coordinates = geometry.getCoordinates();\n          coordinates[depth[1]][depth[0]][segmentData.index + index] = vertex;\n          segment[index] = vertex;\n          break;\n        case 'Circle':\n          segment[0] = vertex;\n          segment[1] = vertex;\n          if (segmentData.index === CIRCLE_CENTER_INDEX) {\n            this.changingFeature_ = true;\n            geometry.setCenter(vertex);\n            this.changingFeature_ = false;\n          } else {\n            // We're dragging the circle's circumference:\n            this.changingFeature_ = true;\n            const projection = evt.map.getView().getProjection();\n            let radius = coordinateDistance(\n              fromUserCoordinate(geometry.getCenter(), projection),\n              fromUserCoordinate(vertex, projection)\n            );\n            const userProjection = getUserProjection();\n            if (userProjection) {\n              const circleGeometry = geometry\n                .clone()\n                .transform(userProjection, projection);\n              circleGeometry.setRadius(radius);\n              radius = circleGeometry\n                .transform(projection, userProjection)\n                .getRadius();\n            }\n            geometry.setRadius(radius);\n            this.changingFeature_ = false;\n          }\n          break;\n        default:\n        // pass\n      }\n\n      if (coordinates) {\n        this.setGeometryCoordinates_(geometry, coordinates);\n      }\n    }\n    this.createOrUpdateVertexFeature_(vertex, features, geometries);\n  }\n\n  /**\n   * Handle pointer down events.\n   * @param {import(\"../MapBrowserEvent.js\").default} evt Event.\n   * @return {boolean} If the event was consumed.\n   */\n  handleDownEvent(evt) {\n    if (!this.condition_(evt)) {\n      return false;\n    }\n    const pixelCoordinate = evt.coordinate;\n    this.handlePointerAtPixel_(evt.pixel, evt.map, pixelCoordinate);\n    this.dragSegments_.length = 0;\n    this.featuresBeingModified_ = null;\n    const vertexFeature = this.vertexFeature_;\n    if (vertexFeature) {\n      const projection = evt.map.getView().getProjection();\n      const insertVertices = [];\n      const vertex = vertexFeature.getGeometry().getCoordinates();\n      const vertexExtent = boundingExtent([vertex]);\n      const segmentDataMatches = this.rBush_.getInExtent(vertexExtent);\n      const componentSegments = {};\n      segmentDataMatches.sort(compareIndexes);\n      for (let i = 0, ii = segmentDataMatches.length; i < ii; ++i) {\n        const segmentDataMatch = segmentDataMatches[i];\n        const segment = segmentDataMatch.segment;\n        let uid = getUid(segmentDataMatch.geometry);\n        const depth = segmentDataMatch.depth;\n        if (depth) {\n          uid += '-' + depth.join('-'); // separate feature components\n        }\n        if (!componentSegments[uid]) {\n          componentSegments[uid] = new Array(2);\n        }\n\n        if (\n          segmentDataMatch.geometry.getType() === 'Circle' &&\n          segmentDataMatch.index === CIRCLE_CIRCUMFERENCE_INDEX\n        ) {\n          const closestVertex = closestOnSegmentData(\n            pixelCoordinate,\n            segmentDataMatch,\n            projection\n          );\n          if (\n            coordinatesEqual(closestVertex, vertex) &&\n            !componentSegments[uid][0]\n          ) {\n            this.dragSegments_.push([segmentDataMatch, 0]);\n            componentSegments[uid][0] = segmentDataMatch;\n          }\n          continue;\n        }\n\n        if (\n          coordinatesEqual(segment[0], vertex) &&\n          !componentSegments[uid][0]\n        ) {\n          this.dragSegments_.push([segmentDataMatch, 0]);\n          componentSegments[uid][0] = segmentDataMatch;\n          continue;\n        }\n\n        if (\n          coordinatesEqual(segment[1], vertex) &&\n          !componentSegments[uid][1]\n        ) {\n          if (\n            componentSegments[uid][0] &&\n            componentSegments[uid][0].index === 0\n          ) {\n            let coordinates = segmentDataMatch.geometry.getCoordinates();\n            switch (segmentDataMatch.geometry.getType()) {\n              // prevent dragging closed linestrings by the connecting node\n              case 'LineString':\n              case 'MultiLineString':\n                continue;\n              // if dragging the first vertex of a polygon, ensure the other segment\n              // belongs to the closing vertex of the linear ring\n              case 'MultiPolygon':\n                coordinates = coordinates[depth[1]];\n              /* falls through */\n              case 'Polygon':\n                if (\n                  segmentDataMatch.index !==\n                  coordinates[depth[0]].length - 2\n                ) {\n                  continue;\n                }\n                break;\n              default:\n              // pass\n            }\n          }\n\n          this.dragSegments_.push([segmentDataMatch, 1]);\n          componentSegments[uid][1] = segmentDataMatch;\n          continue;\n        }\n\n        if (\n          getUid(segment) in this.vertexSegments_ &&\n          !componentSegments[uid][0] &&\n          !componentSegments[uid][1] &&\n          this.insertVertexCondition_(evt)\n        ) {\n          insertVertices.push(segmentDataMatch);\n        }\n      }\n\n      if (insertVertices.length) {\n        this.willModifyFeatures_(evt, [insertVertices]);\n      }\n\n      for (let j = insertVertices.length - 1; j >= 0; --j) {\n        this.insertVertex_(insertVertices[j], vertex);\n      }\n    }\n    return !!this.vertexFeature_;\n  }\n\n  /**\n   * Handle pointer up events.\n   * @param {import(\"../MapBrowserEvent.js\").default} evt Event.\n   * @return {boolean} If the event was consumed.\n   */\n  handleUpEvent(evt) {\n    for (let i = this.dragSegments_.length - 1; i >= 0; --i) {\n      const segmentData = this.dragSegments_[i][0];\n      const geometry = segmentData.geometry;\n      if (geometry.getType() === 'Circle') {\n        // Update a circle object in the R* bush:\n        const coordinates = geometry.getCenter();\n        const centerSegmentData = segmentData.featureSegments[0];\n        const circumferenceSegmentData = segmentData.featureSegments[1];\n        centerSegmentData.segment[0] = coordinates;\n        centerSegmentData.segment[1] = coordinates;\n        circumferenceSegmentData.segment[0] = coordinates;\n        circumferenceSegmentData.segment[1] = coordinates;\n        this.rBush_.update(createExtent(coordinates), centerSegmentData);\n        let circleGeometry = geometry;\n        const userProjection = getUserProjection();\n        if (userProjection) {\n          const projection = evt.map.getView().getProjection();\n          circleGeometry = circleGeometry\n            .clone()\n            .transform(userProjection, projection);\n          circleGeometry = fromCircle(circleGeometry).transform(\n            projection,\n            userProjection\n          );\n        }\n        this.rBush_.update(\n          circleGeometry.getExtent(),\n          circumferenceSegmentData\n        );\n      } else {\n        this.rBush_.update(boundingExtent(segmentData.segment), segmentData);\n      }\n    }\n    if (this.featuresBeingModified_) {\n      this.dispatchEvent(\n        new ModifyEvent(\n          ModifyEventType.MODIFYEND,\n          this.featuresBeingModified_,\n          evt\n        )\n      );\n      this.featuresBeingModified_ = null;\n    }\n    return false;\n  }\n\n  /**\n   * @param {import(\"../MapBrowserEvent.js\").default} evt Event.\n   * @private\n   */\n  handlePointerMove_(evt) {\n    this.lastPixel_ = evt.pixel;\n    this.handlePointerAtPixel_(evt.pixel, evt.map, evt.coordinate);\n  }\n\n  /**\n   * @param {import(\"../pixel.js\").Pixel} pixel Pixel\n   * @param {import(\"../Map.js\").default} map Map.\n   * @param {import(\"../coordinate.js\").Coordinate} [coordinate] The pixel Coordinate.\n   * @private\n   */\n  handlePointerAtPixel_(pixel, map, coordinate) {\n    const pixelCoordinate = coordinate || map.getCoordinateFromPixel(pixel);\n    const projection = map.getView().getProjection();\n    const sortByDistance = function (a, b) {\n      return (\n        projectedDistanceToSegmentDataSquared(pixelCoordinate, a, projection) -\n        projectedDistanceToSegmentDataSquared(pixelCoordinate, b, projection)\n      );\n    };\n\n    /** @type {Array<SegmentData>|undefined} */\n    let nodes;\n    /** @type {Point|undefined} */\n    let hitPointGeometry;\n    if (this.hitDetection_) {\n      const layerFilter =\n        typeof this.hitDetection_ === 'object'\n          ? (layer) => layer === this.hitDetection_\n          : undefined;\n      map.forEachFeatureAtPixel(\n        pixel,\n        (feature, layer, geometry) => {\n          if (geometry) {\n            geometry = new Point(\n              toUserCoordinate(geometry.getCoordinates(), projection)\n            );\n          }\n          const geom = geometry || feature.getGeometry();\n          if (\n            geom.getType() === 'Point' &&\n            feature instanceof Feature &&\n            this.features_.getArray().includes(feature)\n          ) {\n            hitPointGeometry = /** @type {Point} */ (geom);\n            const coordinate = /** @type {Point} */ (feature.getGeometry())\n              .getFlatCoordinates()\n              .slice(0, 2);\n            nodes = [\n              {\n                feature,\n                geometry: hitPointGeometry,\n                segment: [coordinate, coordinate],\n              },\n            ];\n          }\n          return true;\n        },\n        {layerFilter}\n      );\n    }\n    if (!nodes) {\n      const viewExtent = fromUserExtent(\n        createExtent(pixelCoordinate, tempExtent),\n        projection\n      );\n      const buffer = map.getView().getResolution() * this.pixelTolerance_;\n      const box = toUserExtent(\n        bufferExtent(viewExtent, buffer, tempExtent),\n        projection\n      );\n      nodes = this.rBush_.getInExtent(box);\n    }\n\n    if (nodes && nodes.length > 0) {\n      const node = nodes.sort(sortByDistance)[0];\n      const closestSegment = node.segment;\n      let vertex = closestOnSegmentData(pixelCoordinate, node, projection);\n      const vertexPixel = map.getPixelFromCoordinate(vertex);\n      let dist = coordinateDistance(pixel, vertexPixel);\n      if (hitPointGeometry || dist <= this.pixelTolerance_) {\n        /** @type {Object<string, boolean>} */\n        const vertexSegments = {};\n        vertexSegments[getUid(closestSegment)] = true;\n\n        if (!this.snapToPointer_) {\n          this.delta_[0] = vertex[0] - pixelCoordinate[0];\n          this.delta_[1] = vertex[1] - pixelCoordinate[1];\n        }\n        if (\n          node.geometry.getType() === 'Circle' &&\n          node.index === CIRCLE_CIRCUMFERENCE_INDEX\n        ) {\n          this.snappedToVertex_ = true;\n          this.createOrUpdateVertexFeature_(\n            vertex,\n            [node.feature],\n            [node.geometry]\n          );\n        } else {\n          const pixel1 = map.getPixelFromCoordinate(closestSegment[0]);\n          const pixel2 = map.getPixelFromCoordinate(closestSegment[1]);\n          const squaredDist1 = squaredCoordinateDistance(vertexPixel, pixel1);\n          const squaredDist2 = squaredCoordinateDistance(vertexPixel, pixel2);\n          dist = Math.sqrt(Math.min(squaredDist1, squaredDist2));\n          this.snappedToVertex_ = dist <= this.pixelTolerance_;\n          if (this.snappedToVertex_) {\n            vertex =\n              squaredDist1 > squaredDist2\n                ? closestSegment[1]\n                : closestSegment[0];\n          }\n          this.createOrUpdateVertexFeature_(\n            vertex,\n            [node.feature],\n            [node.geometry]\n          );\n          const geometries = {};\n          geometries[getUid(node.geometry)] = true;\n          for (let i = 1, ii = nodes.length; i < ii; ++i) {\n            const segment = nodes[i].segment;\n            if (\n              (coordinatesEqual(closestSegment[0], segment[0]) &&\n                coordinatesEqual(closestSegment[1], segment[1])) ||\n              (coordinatesEqual(closestSegment[0], segment[1]) &&\n                coordinatesEqual(closestSegment[1], segment[0]))\n            ) {\n              const geometryUid = getUid(nodes[i].geometry);\n              if (!(geometryUid in geometries)) {\n                geometries[geometryUid] = true;\n                vertexSegments[getUid(segment)] = true;\n              }\n            } else {\n              break;\n            }\n          }\n        }\n\n        this.vertexSegments_ = vertexSegments;\n        return;\n      }\n    }\n    if (this.vertexFeature_) {\n      this.overlay_.getSource().removeFeature(this.vertexFeature_);\n      this.vertexFeature_ = null;\n    }\n  }\n\n  /**\n   * @param {SegmentData} segmentData Segment data.\n   * @param {import(\"../coordinate.js\").Coordinate} vertex Vertex.\n   * @private\n   */\n  insertVertex_(segmentData, vertex) {\n    const segment = segmentData.segment;\n    const feature = segmentData.feature;\n    const geometry = segmentData.geometry;\n    const depth = segmentData.depth;\n    const index = segmentData.index;\n    let coordinates;\n\n    while (vertex.length < geometry.getStride()) {\n      vertex.push(0);\n    }\n\n    switch (geometry.getType()) {\n      case 'MultiLineString':\n        coordinates = geometry.getCoordinates();\n        coordinates[depth[0]].splice(index + 1, 0, vertex);\n        break;\n      case 'Polygon':\n        coordinates = geometry.getCoordinates();\n        coordinates[depth[0]].splice(index + 1, 0, vertex);\n        break;\n      case 'MultiPolygon':\n        coordinates = geometry.getCoordinates();\n        coordinates[depth[1]][depth[0]].splice(index + 1, 0, vertex);\n        break;\n      case 'LineString':\n        coordinates = geometry.getCoordinates();\n        coordinates.splice(index + 1, 0, vertex);\n        break;\n      default:\n        return;\n    }\n\n    this.setGeometryCoordinates_(geometry, coordinates);\n    const rTree = this.rBush_;\n    rTree.remove(segmentData);\n    this.updateSegmentIndices_(geometry, index, depth, 1);\n\n    /** @type {SegmentData} */\n    const newSegmentData = {\n      segment: [segment[0], vertex],\n      feature: feature,\n      geometry: geometry,\n      depth: depth,\n      index: index,\n    };\n\n    rTree.insert(boundingExtent(newSegmentData.segment), newSegmentData);\n    this.dragSegments_.push([newSegmentData, 1]);\n\n    /** @type {SegmentData} */\n    const newSegmentData2 = {\n      segment: [vertex, segment[1]],\n      feature: feature,\n      geometry: geometry,\n      depth: depth,\n      index: index + 1,\n    };\n\n    rTree.insert(boundingExtent(newSegmentData2.segment), newSegmentData2);\n    this.dragSegments_.push([newSegmentData2, 0]);\n    this.ignoreNextSingleClick_ = true;\n  }\n\n  /**\n   * Removes the vertex currently being pointed.\n   * @return {boolean} True when a vertex was removed.\n   * @api\n   */\n  removePoint() {\n    if (\n      this.lastPointerEvent_ &&\n      this.lastPointerEvent_.type != MapBrowserEventType.POINTERDRAG\n    ) {\n      const evt = this.lastPointerEvent_;\n      this.willModifyFeatures_(evt, this.dragSegments_);\n      const removed = this.removeVertex_();\n      if (this.featuresBeingModified_) {\n        this.dispatchEvent(\n          new ModifyEvent(\n            ModifyEventType.MODIFYEND,\n            this.featuresBeingModified_,\n            evt\n          )\n        );\n      }\n\n      this.featuresBeingModified_ = null;\n      return removed;\n    }\n    return false;\n  }\n\n  /**\n   * Removes a vertex from all matching features.\n   * @return {boolean} True when a vertex was removed.\n   * @private\n   */\n  removeVertex_() {\n    const dragSegments = this.dragSegments_;\n    const segmentsByFeature = {};\n    let deleted = false;\n    let component, coordinates, dragSegment, geometry, i, index, left;\n    let newIndex, right, segmentData, uid;\n    for (i = dragSegments.length - 1; i >= 0; --i) {\n      dragSegment = dragSegments[i];\n      segmentData = dragSegment[0];\n      uid = getUid(segmentData.feature);\n      if (segmentData.depth) {\n        // separate feature components\n        uid += '-' + segmentData.depth.join('-');\n      }\n      if (!(uid in segmentsByFeature)) {\n        segmentsByFeature[uid] = {};\n      }\n      if (dragSegment[1] === 0) {\n        segmentsByFeature[uid].right = segmentData;\n        segmentsByFeature[uid].index = segmentData.index;\n      } else if (dragSegment[1] == 1) {\n        segmentsByFeature[uid].left = segmentData;\n        segmentsByFeature[uid].index = segmentData.index + 1;\n      }\n    }\n    for (uid in segmentsByFeature) {\n      right = segmentsByFeature[uid].right;\n      left = segmentsByFeature[uid].left;\n      index = segmentsByFeature[uid].index;\n      newIndex = index - 1;\n      if (left !== undefined) {\n        segmentData = left;\n      } else {\n        segmentData = right;\n      }\n      if (newIndex < 0) {\n        newIndex = 0;\n      }\n      geometry = segmentData.geometry;\n      coordinates = geometry.getCoordinates();\n      component = coordinates;\n      deleted = false;\n      switch (geometry.getType()) {\n        case 'MultiLineString':\n          if (coordinates[segmentData.depth[0]].length > 2) {\n            coordinates[segmentData.depth[0]].splice(index, 1);\n            deleted = true;\n          }\n          break;\n        case 'LineString':\n          if (coordinates.length > 2) {\n            coordinates.splice(index, 1);\n            deleted = true;\n          }\n          break;\n        case 'MultiPolygon':\n          component = component[segmentData.depth[1]];\n        /* falls through */\n        case 'Polygon':\n          component = component[segmentData.depth[0]];\n          if (component.length > 4) {\n            if (index == component.length - 1) {\n              index = 0;\n            }\n            component.splice(index, 1);\n            deleted = true;\n            if (index === 0) {\n              // close the ring again\n              component.pop();\n              component.push(component[0]);\n              newIndex = component.length - 1;\n            }\n          }\n          break;\n        default:\n        // pass\n      }\n\n      if (deleted) {\n        this.setGeometryCoordinates_(geometry, coordinates);\n        const segments = [];\n        if (left !== undefined) {\n          this.rBush_.remove(left);\n          segments.push(left.segment[0]);\n        }\n        if (right !== undefined) {\n          this.rBush_.remove(right);\n          segments.push(right.segment[1]);\n        }\n        if (left !== undefined && right !== undefined) {\n          /** @type {SegmentData} */\n          const newSegmentData = {\n            depth: segmentData.depth,\n            feature: segmentData.feature,\n            geometry: segmentData.geometry,\n            index: newIndex,\n            segment: segments,\n          };\n\n          this.rBush_.insert(\n            boundingExtent(newSegmentData.segment),\n            newSegmentData\n          );\n        }\n        this.updateSegmentIndices_(geometry, index, segmentData.depth, -1);\n        if (this.vertexFeature_) {\n          this.overlay_.getSource().removeFeature(this.vertexFeature_);\n          this.vertexFeature_ = null;\n        }\n        dragSegments.length = 0;\n      }\n    }\n    return deleted;\n  }\n\n  /**\n   * @param {import(\"../geom/SimpleGeometry.js\").default} geometry Geometry.\n   * @param {Array} coordinates Coordinates.\n   * @private\n   */\n  setGeometryCoordinates_(geometry, coordinates) {\n    this.changingFeature_ = true;\n    geometry.setCoordinates(coordinates);\n    this.changingFeature_ = false;\n  }\n\n  /**\n   * @param {import(\"../geom/SimpleGeometry.js\").default} geometry Geometry.\n   * @param {number} index Index.\n   * @param {Array<number>|undefined} depth Depth.\n   * @param {number} delta Delta (1 or -1).\n   * @private\n   */\n  updateSegmentIndices_(geometry, index, depth, delta) {\n    this.rBush_.forEachInExtent(\n      geometry.getExtent(),\n      function (segmentDataMatch) {\n        if (\n          segmentDataMatch.geometry === geometry &&\n          (depth === undefined ||\n            segmentDataMatch.depth === undefined ||\n            equals(segmentDataMatch.depth, depth)) &&\n          segmentDataMatch.index > index\n        ) {\n          segmentDataMatch.index += delta;\n        }\n      }\n    );\n  }\n}\n\n/**\n * @param {SegmentData} a The first segment data.\n * @param {SegmentData} b The second segment data.\n * @return {number} The difference in indexes.\n */\nfunction compareIndexes(a, b) {\n  return a.index - b.index;\n}\n\n/**\n * Returns the distance from a point to a line segment.\n *\n * @param {import(\"../coordinate.js\").Coordinate} pointCoordinates The coordinates of the point from\n *        which to calculate the distance.\n * @param {SegmentData} segmentData The object describing the line\n *        segment we are calculating the distance to.\n * @param {import(\"../proj/Projection.js\").default} projection The view projection.\n * @return {number} The square of the distance between a point and a line segment.\n */\nfunction projectedDistanceToSegmentDataSquared(\n  pointCoordinates,\n  segmentData,\n  projection\n) {\n  const geometry = segmentData.geometry;\n\n  if (geometry.getType() === 'Circle') {\n    let circleGeometry = /** @type {import(\"../geom/Circle.js\").default} */ (\n      geometry\n    );\n\n    if (segmentData.index === CIRCLE_CIRCUMFERENCE_INDEX) {\n      const userProjection = getUserProjection();\n      if (userProjection) {\n        circleGeometry = /** @type {import(\"../geom/Circle.js\").default} */ (\n          circleGeometry.clone().transform(userProjection, projection)\n        );\n      }\n      const distanceToCenterSquared = squaredCoordinateDistance(\n        circleGeometry.getCenter(),\n        fromUserCoordinate(pointCoordinates, projection)\n      );\n      const distanceToCircumference =\n        Math.sqrt(distanceToCenterSquared) - circleGeometry.getRadius();\n      return distanceToCircumference * distanceToCircumference;\n    }\n  }\n\n  const coordinate = fromUserCoordinate(pointCoordinates, projection);\n  tempSegment[0] = fromUserCoordinate(segmentData.segment[0], projection);\n  tempSegment[1] = fromUserCoordinate(segmentData.segment[1], projection);\n  return squaredDistanceToSegment(coordinate, tempSegment);\n}\n\n/**\n * Returns the point closest to a given line segment.\n *\n * @param {import(\"../coordinate.js\").Coordinate} pointCoordinates The point to which a closest point\n *        should be found.\n * @param {SegmentData} segmentData The object describing the line\n *        segment which should contain the closest point.\n * @param {import(\"../proj/Projection.js\").default} projection The view projection.\n * @return {import(\"../coordinate.js\").Coordinate} The point closest to the specified line segment.\n */\nfunction closestOnSegmentData(pointCoordinates, segmentData, projection) {\n  const geometry = segmentData.geometry;\n\n  if (\n    geometry.getType() === 'Circle' &&\n    segmentData.index === CIRCLE_CIRCUMFERENCE_INDEX\n  ) {\n    let circleGeometry = /** @type {import(\"../geom/Circle.js\").default} */ (\n      geometry\n    );\n    const userProjection = getUserProjection();\n    if (userProjection) {\n      circleGeometry = /** @type {import(\"../geom/Circle.js\").default} */ (\n        circleGeometry.clone().transform(userProjection, projection)\n      );\n    }\n    return toUserCoordinate(\n      circleGeometry.getClosestPoint(\n        fromUserCoordinate(pointCoordinates, projection)\n      ),\n      projection\n    );\n  }\n  const coordinate = fromUserCoordinate(pointCoordinates, projection);\n  tempSegment[0] = fromUserCoordinate(segmentData.segment[0], projection);\n  tempSegment[1] = fromUserCoordinate(segmentData.segment[1], projection);\n  return toUserCoordinate(\n    closestOnSegment(coordinate, tempSegment),\n    projection\n  );\n}\n\n/**\n * @return {import(\"../style/Style.js\").StyleFunction} Styles.\n */\nfunction getDefaultStyleFunction() {\n  const style = createEditingStyle();\n  return function (feature, resolution) {\n    return style['Point'];\n  };\n}\n\nexport default Modify;\n","/**\n * @module ol/interaction/Select\n */\nimport Collection from '../Collection.js';\nimport CollectionEventType from '../CollectionEventType.js';\nimport Event from '../events/Event.js';\nimport Feature from '../Feature.js';\nimport Interaction from './Interaction.js';\nimport VectorLayer from '../layer/Vector.js';\nimport {TRUE} from '../functions.js';\nimport {clear} from '../obj.js';\nimport {createEditingStyle} from '../style/Style.js';\nimport {extend} from '../array.js';\nimport {getUid} from '../util.js';\nimport {never, shiftKeyOnly, singleClick} from '../events/condition.js';\n\n/**\n * @enum {string}\n */\nconst SelectEventType = {\n  /**\n   * Triggered when feature(s) has been (de)selected.\n   * @event SelectEvent#select\n   * @api\n   */\n  SELECT: 'select',\n};\n\n/**\n * A function that takes an {@link module:ol/Feature~Feature} and returns `true` if the feature may be\n * selected or `false` otherwise.\n * @typedef {function(import(\"../Feature.js\").default, import(\"../layer/Layer.js\").default<import(\"../source/Source\").default>):boolean} FilterFunction\n */\n\n/**\n * @typedef {Object} Options\n * @property {import(\"../events/condition.js\").Condition} [addCondition] A function\n * that takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a\n * boolean to indicate whether that event should be handled.\n * By default, this is {@link module:ol/events/condition.never}. Use this if you\n * want to use different events for add and remove instead of `toggle`.\n * @property {import(\"../events/condition.js\").Condition} [condition] A function that\n * takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a\n * boolean to indicate whether that event should be handled. This is the event\n * for the selected features as a whole. By default, this is\n * {@link module:ol/events/condition.singleClick}. Clicking on a feature selects that\n * feature and removes any that were in the selection. Clicking outside any\n * feature removes all from the selection.\n * See `toggle`, `add`, `remove` options for adding/removing extra features to/\n * from the selection.\n * @property {Array<import(\"../layer/Layer.js\").default>|function(import(\"../layer/Layer.js\").default<import(\"../source/Source\").default>): boolean} [layers]\n * A list of layers from which features should be selected. Alternatively, a\n * filter function can be provided. The function will be called for each layer\n * in the map and should return `true` for layers that you want to be\n * selectable. If the option is absent, all visible layers will be considered\n * selectable.\n * @property {import(\"../style/Style.js\").StyleLike|null} [style]\n * Style for the selected features. By default the default edit style is used\n * (see {@link module:ol/style/Style~Style}). Set to `null` if this interaction should not apply\n * any style changes for selected features.\n * If set to a falsey value, the selected feature's style will not change.\n * @property {import(\"../events/condition.js\").Condition} [removeCondition] A function\n * that takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a\n * boolean to indicate whether that event should be handled.\n * By default, this is {@link module:ol/events/condition.never}. Use this if you\n * want to use different events for add and remove instead of `toggle`.\n * @property {import(\"../events/condition.js\").Condition} [toggleCondition] A function\n * that takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a\n * boolean to indicate whether that event should be handled. This is in addition\n * to the `condition` event. By default,\n * {@link module:ol/events/condition.shiftKeyOnly}, i.e. pressing `shift` as\n * well as the `condition` event, adds that feature to the current selection if\n * it is not currently selected, and removes it if it is. See `add` and `remove`\n * if you want to use different events instead of a toggle.\n * @property {boolean} [multi=false] A boolean that determines if the default\n * behaviour should select only single features or all (overlapping) features at\n * the clicked map position. The default of `false` means single select.\n * @property {Collection<Feature>} [features]\n * Collection where the interaction will place selected features. Optional. If\n * not set the interaction will create a collection. In any case the collection\n * used by the interaction is returned by\n * {@link module:ol/interaction/Select~Select#getFeatures}.\n * @property {FilterFunction} [filter] A function\n * that takes an {@link module:ol/Feature~Feature} and an\n * {@link module:ol/layer/Layer~Layer} and returns `true` if the feature may be\n * selected or `false` otherwise.\n * @property {number} [hitTolerance=0] Hit-detection tolerance. Pixels inside\n * the radius around the given position will be checked for features.\n */\n\n/**\n * @classdesc\n * Events emitted by {@link module:ol/interaction/Select~Select} instances are instances of\n * this type.\n */\nexport class SelectEvent extends Event {\n  /**\n   * @param {SelectEventType} type The event type.\n   * @param {Array<import(\"../Feature.js\").default>} selected Selected features.\n   * @param {Array<import(\"../Feature.js\").default>} deselected Deselected features.\n   * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Associated\n   *     {@link module:ol/MapBrowserEvent~MapBrowserEvent}.\n   */\n  constructor(type, selected, deselected, mapBrowserEvent) {\n    super(type);\n\n    /**\n     * Selected features array.\n     * @type {Array<import(\"../Feature.js\").default>}\n     * @api\n     */\n    this.selected = selected;\n\n    /**\n     * Deselected features array.\n     * @type {Array<import(\"../Feature.js\").default>}\n     * @api\n     */\n    this.deselected = deselected;\n\n    /**\n     * Associated {@link module:ol/MapBrowserEvent~MapBrowserEvent}.\n     * @type {import(\"../MapBrowserEvent.js\").default}\n     * @api\n     */\n    this.mapBrowserEvent = mapBrowserEvent;\n  }\n}\n\n/**\n * Original feature styles to reset to when features are no longer selected.\n * @type {Object<number, import(\"../style/Style.js\").default|Array<import(\"../style/Style.js\").default>|import(\"../style/Style.js\").StyleFunction>}\n */\nconst originalFeatureStyles = {};\n\n/***\n * @template Return\n * @typedef {import(\"../Observable\").OnSignature<import(\"../Observable\").EventTypes, import(\"../events/Event.js\").default, Return> &\n *   import(\"../Observable\").OnSignature<import(\"../ObjectEventType\").Types|\n *     'change:active', import(\"../Object\").ObjectEvent, Return> &\n *   import(\"../Observable\").OnSignature<'select', SelectEvent, Return> &\n *   import(\"../Observable\").CombinedOnSignature<import(\"../Observable\").EventTypes|import(\"../ObjectEventType\").Types|\n *     'change:active'|'select', Return>} SelectOnSignature\n */\n\n/**\n * @classdesc\n * Interaction for selecting vector features. By default, selected features are\n * styled differently, so this interaction can be used for visual highlighting,\n * as well as selecting features for other actions, such as modification or\n * output. There are three ways of controlling which features are selected:\n * using the browser event as defined by the `condition` and optionally the\n * `toggle`, `add`/`remove`, and `multi` options; a `layers` filter; and a\n * further feature filter using the `filter` option.\n *\n * @fires SelectEvent\n * @api\n */\nclass Select extends Interaction {\n  /**\n   * @param {Options} [options] Options.\n   */\n  constructor(options) {\n    super();\n\n    /***\n     * @type {SelectOnSignature<import(\"../events\").EventsKey>}\n     */\n    this.on;\n\n    /***\n     * @type {SelectOnSignature<import(\"../events\").EventsKey>}\n     */\n    this.once;\n\n    /***\n     * @type {SelectOnSignature<void>}\n     */\n    this.un;\n\n    options = options ? options : {};\n\n    /**\n     * @private\n     */\n    this.boundAddFeature_ = this.addFeature_.bind(this);\n\n    /**\n     * @private\n     */\n    this.boundRemoveFeature_ = this.removeFeature_.bind(this);\n\n    /**\n     * @private\n     * @type {import(\"../events/condition.js\").Condition}\n     */\n    this.condition_ = options.condition ? options.condition : singleClick;\n\n    /**\n     * @private\n     * @type {import(\"../events/condition.js\").Condition}\n     */\n    this.addCondition_ = options.addCondition ? options.addCondition : never;\n\n    /**\n     * @private\n     * @type {import(\"../events/condition.js\").Condition}\n     */\n    this.removeCondition_ = options.removeCondition\n      ? options.removeCondition\n      : never;\n\n    /**\n     * @private\n     * @type {import(\"../events/condition.js\").Condition}\n     */\n    this.toggleCondition_ = options.toggleCondition\n      ? options.toggleCondition\n      : shiftKeyOnly;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.multi_ = options.multi ? options.multi : false;\n\n    /**\n     * @private\n     * @type {FilterFunction}\n     */\n    this.filter_ = options.filter ? options.filter : TRUE;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.hitTolerance_ = options.hitTolerance ? options.hitTolerance : 0;\n\n    /**\n     * @private\n     * @type {import(\"../style/Style.js\").default|Array<import(\"../style/Style.js\").default>|import(\"../style/Style.js\").StyleFunction|null}\n     */\n    this.style_ =\n      options.style !== undefined ? options.style : getDefaultStyleFunction();\n\n    /**\n     * @private\n     * @type {Collection<Feature>}\n     */\n    this.features_ = options.features || new Collection();\n\n    /** @type {function(import(\"../layer/Layer.js\").default<import(\"../source/Source\").default>): boolean} */\n    let layerFilter;\n    if (options.layers) {\n      if (typeof options.layers === 'function') {\n        layerFilter = options.layers;\n      } else {\n        const layers = options.layers;\n        layerFilter = function (layer) {\n          return layers.includes(layer);\n        };\n      }\n    } else {\n      layerFilter = TRUE;\n    }\n\n    /**\n     * @private\n     * @type {function(import(\"../layer/Layer.js\").default<import(\"../source/Source\").default>): boolean}\n     */\n    this.layerFilter_ = layerFilter;\n\n    /**\n     * An association between selected feature (key)\n     * and layer (value)\n     * @private\n     * @type {Object<string, import(\"../layer/Layer.js\").default>}\n     */\n    this.featureLayerAssociation_ = {};\n  }\n\n  /**\n   * @param {import(\"../Feature.js\").default} feature Feature.\n   * @param {import(\"../layer/Layer.js\").default} layer Layer.\n   * @private\n   */\n  addFeatureLayerAssociation_(feature, layer) {\n    this.featureLayerAssociation_[getUid(feature)] = layer;\n  }\n\n  /**\n   * Get the selected features.\n   * @return {Collection<Feature>} Features collection.\n   * @api\n   */\n  getFeatures() {\n    return this.features_;\n  }\n\n  /**\n   * Returns the Hit-detection tolerance.\n   * @return {number} Hit tolerance in pixels.\n   * @api\n   */\n  getHitTolerance() {\n    return this.hitTolerance_;\n  }\n\n  /**\n   * Returns the associated {@link module:ol/layer/Vector~VectorLayer vector layer} of\n   * a selected feature.\n   * @param {import(\"../Feature.js\").default} feature Feature\n   * @return {import('../layer/Vector.js').default} Layer.\n   * @api\n   */\n  getLayer(feature) {\n    return /** @type {import('../layer/Vector.js').default} */ (\n      this.featureLayerAssociation_[getUid(feature)]\n    );\n  }\n\n  /**\n   * Hit-detection tolerance. Pixels inside the radius around the given position\n   * will be checked for features.\n   * @param {number} hitTolerance Hit tolerance in pixels.\n   * @api\n   */\n  setHitTolerance(hitTolerance) {\n    this.hitTolerance_ = hitTolerance;\n  }\n\n  /**\n   * Remove the interaction from its current map, if any,  and attach it to a new\n   * map, if any. Pass `null` to just remove the interaction from the current map.\n   * @param {import(\"../Map.js\").default|null} map Map.\n   * @api\n   */\n  setMap(map) {\n    const currentMap = this.getMap();\n    if (currentMap && this.style_) {\n      this.features_.forEach(this.restorePreviousStyle_.bind(this));\n    }\n    super.setMap(map);\n    if (map) {\n      this.features_.addEventListener(\n        CollectionEventType.ADD,\n        this.boundAddFeature_\n      );\n      this.features_.addEventListener(\n        CollectionEventType.REMOVE,\n        this.boundRemoveFeature_\n      );\n\n      if (this.style_) {\n        this.features_.forEach(this.applySelectedStyle_.bind(this));\n      }\n    } else {\n      this.features_.removeEventListener(\n        CollectionEventType.ADD,\n        this.boundAddFeature_\n      );\n      this.features_.removeEventListener(\n        CollectionEventType.REMOVE,\n        this.boundRemoveFeature_\n      );\n    }\n  }\n\n  /**\n   * @param {import(\"../Collection.js\").CollectionEvent<Feature>} evt Event.\n   * @private\n   */\n  addFeature_(evt) {\n    const feature = evt.element;\n    if (this.style_) {\n      this.applySelectedStyle_(feature);\n    }\n    if (!this.getLayer(feature)) {\n      const layer = /** @type {VectorLayer} */ (\n        this.getMap()\n          .getAllLayers()\n          .find(function (layer) {\n            if (\n              layer instanceof VectorLayer &&\n              layer.getSource() &&\n              layer.getSource().hasFeature(feature)\n            ) {\n              return layer;\n            }\n          })\n      );\n      if (layer) {\n        this.addFeatureLayerAssociation_(feature, layer);\n      }\n    }\n  }\n\n  /**\n   * @param {import(\"../Collection.js\").CollectionEvent<Feature>} evt Event.\n   * @private\n   */\n  removeFeature_(evt) {\n    if (this.style_) {\n      this.restorePreviousStyle_(evt.element);\n    }\n  }\n\n  /**\n   * @return {import(\"../style/Style.js\").StyleLike|null} Select style.\n   */\n  getStyle() {\n    return this.style_;\n  }\n\n  /**\n   * @param {Feature} feature Feature\n   * @private\n   */\n  applySelectedStyle_(feature) {\n    const key = getUid(feature);\n    if (!(key in originalFeatureStyles)) {\n      originalFeatureStyles[key] = feature.getStyle();\n    }\n    feature.setStyle(this.style_);\n  }\n\n  /**\n   * @param {Feature} feature Feature\n   * @private\n   */\n  restorePreviousStyle_(feature) {\n    const interactions = this.getMap().getInteractions().getArray();\n    for (let i = interactions.length - 1; i >= 0; --i) {\n      const interaction = interactions[i];\n      if (\n        interaction !== this &&\n        interaction instanceof Select &&\n        interaction.getStyle() &&\n        interaction.getFeatures().getArray().lastIndexOf(feature) !== -1\n      ) {\n        feature.setStyle(interaction.getStyle());\n        return;\n      }\n    }\n\n    const key = getUid(feature);\n    feature.setStyle(originalFeatureStyles[key]);\n    delete originalFeatureStyles[key];\n  }\n\n  /**\n   * @param {Feature} feature Feature.\n   * @private\n   */\n  removeFeatureLayerAssociation_(feature) {\n    delete this.featureLayerAssociation_[getUid(feature)];\n  }\n\n  /**\n   * Handles the {@link module:ol/MapBrowserEvent~MapBrowserEvent map browser event} and may change the\n   * selected state of features.\n   * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n   * @return {boolean} `false` to stop event propagation.\n   */\n  handleEvent(mapBrowserEvent) {\n    if (!this.condition_(mapBrowserEvent)) {\n      return true;\n    }\n    const add = this.addCondition_(mapBrowserEvent);\n    const remove = this.removeCondition_(mapBrowserEvent);\n    const toggle = this.toggleCondition_(mapBrowserEvent);\n    const set = !add && !remove && !toggle;\n    const map = mapBrowserEvent.map;\n    const features = this.getFeatures();\n\n    /**\n     * @type {Array<Feature>}\n     */\n    const deselected = [];\n\n    /**\n     * @type {Array<Feature>}\n     */\n    const selected = [];\n\n    if (set) {\n      // Replace the currently selected feature(s) with the feature(s) at the\n      // pixel, or clear the selected feature(s) if there is no feature at\n      // the pixel.\n      clear(this.featureLayerAssociation_);\n      map.forEachFeatureAtPixel(\n        mapBrowserEvent.pixel,\n        /**\n         * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n         * @param {import(\"../layer/Layer.js\").default} layer Layer.\n         * @return {boolean|undefined} Continue to iterate over the features.\n         */\n        (feature, layer) => {\n          if (!(feature instanceof Feature) || !this.filter_(feature, layer)) {\n            return;\n          }\n          this.addFeatureLayerAssociation_(feature, layer);\n          selected.push(feature);\n          return !this.multi_;\n        },\n        {\n          layerFilter: this.layerFilter_,\n          hitTolerance: this.hitTolerance_,\n        }\n      );\n      for (let i = features.getLength() - 1; i >= 0; --i) {\n        const feature = features.item(i);\n        const index = selected.indexOf(feature);\n        if (index > -1) {\n          // feature is already selected\n          selected.splice(index, 1);\n        } else {\n          features.remove(feature);\n          deselected.push(feature);\n        }\n      }\n      if (selected.length !== 0) {\n        features.extend(selected);\n      }\n    } else {\n      // Modify the currently selected feature(s).\n      map.forEachFeatureAtPixel(\n        mapBrowserEvent.pixel,\n        /**\n         * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n         * @param {import(\"../layer/Layer.js\").default} layer Layer.\n         * @return {boolean|undefined} Continue to iterate over the features.\n         */\n        (feature, layer) => {\n          if (!(feature instanceof Feature) || !this.filter_(feature, layer)) {\n            return;\n          }\n          if ((add || toggle) && !features.getArray().includes(feature)) {\n            this.addFeatureLayerAssociation_(feature, layer);\n            selected.push(feature);\n          } else if (\n            (remove || toggle) &&\n            features.getArray().includes(feature)\n          ) {\n            deselected.push(feature);\n            this.removeFeatureLayerAssociation_(feature);\n          }\n          return !this.multi_;\n        },\n        {\n          layerFilter: this.layerFilter_,\n          hitTolerance: this.hitTolerance_,\n        }\n      );\n      for (let j = deselected.length - 1; j >= 0; --j) {\n        features.remove(deselected[j]);\n      }\n      features.extend(selected);\n    }\n    if (selected.length > 0 || deselected.length > 0) {\n      this.dispatchEvent(\n        new SelectEvent(\n          SelectEventType.SELECT,\n          selected,\n          deselected,\n          mapBrowserEvent\n        )\n      );\n    }\n    return true;\n  }\n}\n\n/**\n * @return {import(\"../style/Style.js\").StyleFunction} Styles.\n */\nfunction getDefaultStyleFunction() {\n  const styles = createEditingStyle();\n  extend(styles['Polygon'], styles['LineString']);\n  extend(styles['GeometryCollection'], styles['LineString']);\n\n  return function (feature) {\n    if (!feature.getGeometry()) {\n      return null;\n    }\n    return styles[feature.getGeometry().getType()];\n  };\n}\n\nexport default Select;\n","/**\n * @module ol/events/SnapEvent\n */\nimport Event from './Event.js';\n\n/**\n * @enum {string}\n */\nexport const SnapEventType = {\n  /**\n   * Triggered upon snapping to vertex or edge\n   * @event SnapEvent#snap\n   * @api\n   */\n  SNAP: 'snap',\n};\n\n/**\n * @classdesc\n * Events emitted by {@link module:ol/interaction/Snap~Snap} instances are instances of this\n */\nexport class SnapEvent extends Event {\n  /**\n   * @param {SnapEventType} type Type.\n   * @param {Object} options Options.\n   * @param {import(\"../coordinate.js\").Coordinate} options.vertex The snapped vertex.\n   * @param {import(\"../coordinate.js\").Coordinate} options.vertexPixel The pixel of the snapped vertex.\n   * @param {import(\"../Feature.js\").default} options.feature The feature being snapped.\n   */\n  constructor(type, options) {\n    super(type);\n    /**\n     * The Map coordinate of the snapped point.\n     * @type {import(\"../coordinate.js\").Coordinate}\n     * @api\n     */\n    this.vertex = options.vertex;\n    /**\n     * The Map pixel of the snapped point.\n     * @type {Array<number>&Array<number>}\n     * @api\n     */\n    this.vertexPixel = options.vertexPixel;\n    /**\n     * The feature closest to the snapped point.\n     * @type {import(\"../Feature.js\").default<import(\"../geom/Geometry.js\").default>}\n     * @api\n     */\n    this.feature = options.feature;\n  }\n}\n","/**\n * @module ol/interaction/Snap\n */\nimport CollectionEventType from '../CollectionEventType.js';\nimport EventType from '../events/EventType.js';\nimport PointerInteraction from './Pointer.js';\nimport RBush from '../structs/RBush.js';\nimport VectorEventType from '../source/VectorEventType.js';\nimport {FALSE, TRUE} from '../functions.js';\nimport {SnapEvent, SnapEventType} from '../events/SnapEvent.js';\nimport {boundingExtent, buffer, createEmpty} from '../extent.js';\nimport {\n  closestOnCircle,\n  closestOnSegment,\n  squaredDistance,\n} from '../coordinate.js';\nimport {fromCircle} from '../geom/Polygon.js';\nimport {\n  fromUserCoordinate,\n  getUserProjection,\n  toUserCoordinate,\n  toUserExtent,\n} from '../proj.js';\nimport {getUid} from '../util.js';\nimport {listen, unlistenByKey} from '../events.js';\n\n/**\n * @typedef {Object} Result\n * @property {import(\"../coordinate.js\").Coordinate|null} vertex Vertex.\n * @property {import(\"../pixel.js\").Pixel|null} vertexPixel VertexPixel.\n * @property {import(\"../Feature.js\").default|null} feature Feature.\n */\n\n/**\n * @typedef {Object} SegmentData\n * @property {import(\"../Feature.js\").default} feature Feature.\n * @property {Array<import(\"../coordinate.js\").Coordinate>} segment Segment.\n */\n\n/**\n * @typedef {Object} Options\n * @property {import(\"../Collection.js\").default<import(\"../Feature.js\").default>} [features] Snap to these features. Either this option or source should be provided.\n * @property {boolean} [edge=true] Snap to edges.\n * @property {boolean} [vertex=true] Snap to vertices.\n * @property {number} [pixelTolerance=10] Pixel tolerance for considering the pointer close enough to a segment or\n * vertex for snapping.\n * @property {import(\"../source/Vector.js\").default} [source] Snap to features from this source. Either this option or features should be provided\n */\n\n/**\n * @param  {import(\"../source/Vector.js\").VectorSourceEvent|import(\"../Collection.js\").CollectionEvent<import(\"../Feature.js\").default>} evt Event.\n * @return {import(\"../Feature.js\").default|null} Feature.\n */\nfunction getFeatureFromEvent(evt) {\n  if (\n    /** @type {import(\"../source/Vector.js\").VectorSourceEvent} */ (evt).feature\n  ) {\n    return /** @type {import(\"../source/Vector.js\").VectorSourceEvent} */ (evt)\n      .feature;\n  }\n  if (\n    /** @type {import(\"../Collection.js\").CollectionEvent<import(\"../Feature.js\").default>} */ (\n      evt\n    ).element\n  ) {\n    return /** @type {import(\"../Collection.js\").CollectionEvent<import(\"../Feature.js\").default>} */ (\n      evt\n    ).element;\n  }\n  return null;\n}\n\nconst tempSegment = [];\n\n/***\n * @template Return\n * @typedef {import(\"../Observable\").OnSignature<import(\"../Observable\").EventTypes, import(\"../events/Event.js\").default, Return> &\n *   import(\"../Observable\").OnSignature<import(\"../ObjectEventType\").Types|\n *     'change:active', import(\"../Object\").ObjectEvent, Return> &\n *   import(\"../Observable\").OnSignature<'snap', SnapEvent, Return> &\n *   import(\"../Observable\").CombinedOnSignature<import(\"../Observable\").EventTypes|import(\"../ObjectEventType\").Types|\n *     'change:active'|'snap', Return>} SnapOnSignature\n */\n\n/**\n * @classdesc\n * Handles snapping of vector features while modifying or drawing them.  The\n * features can come from a {@link module:ol/source/Vector~VectorSource} or {@link module:ol/Collection~Collection}\n * Any interaction object that allows the user to interact\n * with the features using the mouse can benefit from the snapping, as long\n * as it is added before.\n *\n * The snap interaction modifies map browser event `coordinate` and `pixel`\n * properties to force the snap to occur to any interaction that them.\n *\n * Example:\n *\n *     import Snap from 'ol/interaction/Snap.js';\n *\n *     const snap = new Snap({\n *       source: source\n *     });\n *\n *     map.addInteraction(snap);\n *\n * @fires SnapEvent\n * @api\n */\nclass Snap extends PointerInteraction {\n  /**\n   * @param {Options} [options] Options.\n   */\n  constructor(options) {\n    options = options ? options : {};\n\n    const pointerOptions = /** @type {import(\"./Pointer.js\").Options} */ (\n      options\n    );\n\n    if (!pointerOptions.handleDownEvent) {\n      pointerOptions.handleDownEvent = TRUE;\n    }\n\n    if (!pointerOptions.stopDown) {\n      pointerOptions.stopDown = FALSE;\n    }\n\n    super(pointerOptions);\n\n    /***\n     * @type {SnapOnSignature<import(\"../events\").EventsKey>}\n     */\n    this.on;\n\n    /***\n     * @type {SnapOnSignature<import(\"../events\").EventsKey>}\n     */\n    this.once;\n\n    /***\n     * @type {SnapOnSignature<void>}\n     */\n    this.un;\n\n    /**\n     * @type {import(\"../source/Vector.js\").default|null}\n     * @private\n     */\n    this.source_ = options.source ? options.source : null;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.vertex_ = options.vertex !== undefined ? options.vertex : true;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.edge_ = options.edge !== undefined ? options.edge : true;\n\n    /**\n     * @type {import(\"../Collection.js\").default<import(\"../Feature.js\").default>|null}\n     * @private\n     */\n    this.features_ = options.features ? options.features : null;\n\n    /**\n     * @type {Array<import(\"../events.js\").EventsKey>}\n     * @private\n     */\n    this.featuresListenerKeys_ = [];\n\n    /**\n     * @type {Object<string, import(\"../events.js\").EventsKey>}\n     * @private\n     */\n    this.featureChangeListenerKeys_ = {};\n\n    /**\n     * Extents are preserved so indexed segment can be quickly removed\n     * when its feature geometry changes\n     * @type {Object<string, import(\"../extent.js\").Extent>}\n     * @private\n     */\n    this.indexedFeaturesExtents_ = {};\n\n    /**\n     * If a feature geometry changes while a pointer drag|move event occurs, the\n     * feature doesn't get updated right away.  It will be at the next 'pointerup'\n     * event fired.\n     * @type {!Object<string, import(\"../Feature.js\").default>}\n     * @private\n     */\n    this.pendingFeatures_ = {};\n\n    /**\n     * @type {number}\n     * @private\n     */\n    this.pixelTolerance_ =\n      options.pixelTolerance !== undefined ? options.pixelTolerance : 10;\n\n    /**\n     * Segment RTree for each layer\n     * @type {import(\"../structs/RBush.js\").default<SegmentData>}\n     * @private\n     */\n    this.rBush_ = new RBush();\n\n    /**\n     * @const\n     * @private\n     * @type {Object<string, function(Array<Array<import('../coordinate.js').Coordinate>>, import(\"../geom/Geometry.js\").default): void>}\n     */\n    this.GEOMETRY_SEGMENTERS_ = {\n      'Point': this.segmentPointGeometry_.bind(this),\n      'LineString': this.segmentLineStringGeometry_.bind(this),\n      'LinearRing': this.segmentLineStringGeometry_.bind(this),\n      'Polygon': this.segmentPolygonGeometry_.bind(this),\n      'MultiPoint': this.segmentMultiPointGeometry_.bind(this),\n      'MultiLineString': this.segmentMultiLineStringGeometry_.bind(this),\n      'MultiPolygon': this.segmentMultiPolygonGeometry_.bind(this),\n      'GeometryCollection': this.segmentGeometryCollectionGeometry_.bind(this),\n      'Circle': this.segmentCircleGeometry_.bind(this),\n    };\n  }\n\n  /**\n   * Add a feature to the collection of features that we may snap to.\n   * @param {import(\"../Feature.js\").default} feature Feature.\n   * @param {boolean} [register] Whether to listen to the feature change or not\n   *     Defaults to `true`.\n   * @api\n   */\n  addFeature(feature, register) {\n    register = register !== undefined ? register : true;\n    const feature_uid = getUid(feature);\n    const geometry = feature.getGeometry();\n    if (geometry) {\n      const segmenter = this.GEOMETRY_SEGMENTERS_[geometry.getType()];\n      if (segmenter) {\n        this.indexedFeaturesExtents_[feature_uid] = geometry.getExtent(\n          createEmpty()\n        );\n        const segments =\n          /** @type {Array<Array<import('../coordinate.js').Coordinate>>} */ ([]);\n        segmenter(segments, geometry);\n        if (segments.length === 1) {\n          this.rBush_.insert(boundingExtent(segments[0]), {\n            feature: feature,\n            segment: segments[0],\n          });\n        } else if (segments.length > 1) {\n          const extents = segments.map((s) => boundingExtent(s));\n          const segmentsData = segments.map((segment) => ({\n            feature: feature,\n            segment: segment,\n          }));\n          this.rBush_.load(extents, segmentsData);\n        }\n      }\n    }\n\n    if (register) {\n      this.featureChangeListenerKeys_[feature_uid] = listen(\n        feature,\n        EventType.CHANGE,\n        this.handleFeatureChange_,\n        this\n      );\n    }\n  }\n\n  /**\n   * @return {import(\"../Collection.js\").default<import(\"../Feature.js\").default>|Array<import(\"../Feature.js\").default>} Features.\n   * @private\n   */\n  getFeatures_() {\n    /** @type {import(\"../Collection.js\").default<import(\"../Feature.js\").default>|Array<import(\"../Feature.js\").default>} */\n    let features;\n    if (this.features_) {\n      features = this.features_;\n    } else if (this.source_) {\n      features = this.source_.getFeatures();\n    }\n    return features;\n  }\n\n  /**\n   * @param {import(\"../MapBrowserEvent.js\").default} evt Map browser event.\n   * @return {boolean} `false` to stop event propagation.\n   * @api\n   */\n  handleEvent(evt) {\n    const result = this.snapTo(evt.pixel, evt.coordinate, evt.map);\n    if (result) {\n      evt.coordinate = result.vertex.slice(0, 2);\n      evt.pixel = result.vertexPixel;\n      this.dispatchEvent(\n        new SnapEvent(SnapEventType.SNAP, {\n          vertex: evt.coordinate,\n          vertexPixel: evt.pixel,\n          feature: result.feature,\n        })\n      );\n    }\n    return super.handleEvent(evt);\n  }\n\n  /**\n   * @param {import(\"../source/Vector.js\").VectorSourceEvent|import(\"../Collection.js\").CollectionEvent<import(\"../Feature.js\").default>} evt Event.\n   * @private\n   */\n  handleFeatureAdd_(evt) {\n    const feature = getFeatureFromEvent(evt);\n    if (feature) {\n      this.addFeature(feature);\n    }\n  }\n\n  /**\n   * @param {import(\"../source/Vector.js\").VectorSourceEvent|import(\"../Collection.js\").CollectionEvent<import(\"../Feature.js\").default>} evt Event.\n   * @private\n   */\n  handleFeatureRemove_(evt) {\n    const feature = getFeatureFromEvent(evt);\n    if (feature) {\n      this.removeFeature(feature);\n    }\n  }\n\n  /**\n   * @param {import(\"../events/Event.js\").default} evt Event.\n   * @private\n   */\n  handleFeatureChange_(evt) {\n    const feature = /** @type {import(\"../Feature.js\").default} */ (evt.target);\n    if (this.handlingDownUpSequence) {\n      const uid = getUid(feature);\n      if (!(uid in this.pendingFeatures_)) {\n        this.pendingFeatures_[uid] = feature;\n      }\n    } else {\n      this.updateFeature_(feature);\n    }\n  }\n\n  /**\n   * Handle pointer up events.\n   * @param {import(\"../MapBrowserEvent.js\").default} evt Event.\n   * @return {boolean} If the event was consumed.\n   */\n  handleUpEvent(evt) {\n    const featuresToUpdate = Object.values(this.pendingFeatures_);\n    if (featuresToUpdate.length) {\n      featuresToUpdate.forEach(this.updateFeature_.bind(this));\n      this.pendingFeatures_ = {};\n    }\n    return false;\n  }\n\n  /**\n   * Remove a feature from the collection of features that we may snap to.\n   * @param {import(\"../Feature.js\").default} feature Feature\n   * @param {boolean} [unlisten] Whether to unlisten to the feature change\n   *     or not. Defaults to `true`.\n   * @api\n   */\n  removeFeature(feature, unlisten) {\n    const unregister = unlisten !== undefined ? unlisten : true;\n    const feature_uid = getUid(feature);\n    const extent = this.indexedFeaturesExtents_[feature_uid];\n    if (extent) {\n      const rBush = this.rBush_;\n      const nodesToRemove = [];\n      rBush.forEachInExtent(extent, function (node) {\n        if (feature === node.feature) {\n          nodesToRemove.push(node);\n        }\n      });\n      for (let i = nodesToRemove.length - 1; i >= 0; --i) {\n        rBush.remove(nodesToRemove[i]);\n      }\n    }\n\n    if (unregister) {\n      unlistenByKey(this.featureChangeListenerKeys_[feature_uid]);\n      delete this.featureChangeListenerKeys_[feature_uid];\n    }\n  }\n\n  /**\n   * Remove the interaction from its current map and attach it to the new map.\n   * Subclasses may set up event handlers to get notified about changes to\n   * the map here.\n   * @param {import(\"../Map.js\").default} map Map.\n   */\n  setMap(map) {\n    const currentMap = this.getMap();\n    const keys = this.featuresListenerKeys_;\n    const features = /** @type {Array<import(\"../Feature.js\").default>} */ (\n      this.getFeatures_()\n    );\n\n    if (currentMap) {\n      keys.forEach(unlistenByKey);\n      keys.length = 0;\n      this.rBush_.clear();\n      Object.values(this.featureChangeListenerKeys_).forEach(unlistenByKey);\n      this.featureChangeListenerKeys_ = {};\n    }\n    super.setMap(map);\n\n    if (map) {\n      if (this.features_) {\n        keys.push(\n          listen(\n            this.features_,\n            CollectionEventType.ADD,\n            this.handleFeatureAdd_,\n            this\n          ),\n          listen(\n            this.features_,\n            CollectionEventType.REMOVE,\n            this.handleFeatureRemove_,\n            this\n          )\n        );\n      } else if (this.source_) {\n        keys.push(\n          listen(\n            this.source_,\n            VectorEventType.ADDFEATURE,\n            this.handleFeatureAdd_,\n            this\n          ),\n          listen(\n            this.source_,\n            VectorEventType.REMOVEFEATURE,\n            this.handleFeatureRemove_,\n            this\n          )\n        );\n      }\n      features.forEach((feature) => this.addFeature(feature));\n    }\n  }\n\n  /**\n   * @param {import(\"../pixel.js\").Pixel} pixel Pixel\n   * @param {import(\"../coordinate.js\").Coordinate} pixelCoordinate Coordinate\n   * @param {import(\"../Map.js\").default} map Map.\n   * @return {Result|null} Snap result\n   */\n  snapTo(pixel, pixelCoordinate, map) {\n    const projection = map.getView().getProjection();\n    const projectedCoordinate = fromUserCoordinate(pixelCoordinate, projection);\n\n    const box = toUserExtent(\n      buffer(\n        boundingExtent([projectedCoordinate]),\n        map.getView().getResolution() * this.pixelTolerance_\n      ),\n      projection\n    );\n\n    const segments = this.rBush_.getInExtent(box);\n    const segmentsLength = segments.length;\n    if (segmentsLength === 0) {\n      return null;\n    }\n\n    let closestVertex;\n    let minSquaredDistance = Infinity;\n    let closestFeature;\n\n    const squaredPixelTolerance = this.pixelTolerance_ * this.pixelTolerance_;\n    const getResult = () => {\n      if (closestVertex) {\n        const vertexPixel = map.getPixelFromCoordinate(closestVertex);\n        const squaredPixelDistance = squaredDistance(pixel, vertexPixel);\n        if (squaredPixelDistance <= squaredPixelTolerance) {\n          return {\n            vertex: closestVertex,\n            vertexPixel: [\n              Math.round(vertexPixel[0]),\n              Math.round(vertexPixel[1]),\n            ],\n            feature: closestFeature,\n          };\n        }\n      }\n      return null;\n    };\n\n    if (this.vertex_) {\n      for (let i = 0; i < segmentsLength; ++i) {\n        const segmentData = segments[i];\n        if (segmentData.feature.getGeometry().getType() !== 'Circle') {\n          segmentData.segment.forEach((vertex) => {\n            const tempVertexCoord = fromUserCoordinate(vertex, projection);\n            const delta = squaredDistance(projectedCoordinate, tempVertexCoord);\n            if (delta < minSquaredDistance) {\n              closestVertex = vertex;\n              minSquaredDistance = delta;\n              closestFeature = segmentData.feature;\n            }\n          });\n        }\n      }\n      const result = getResult();\n      if (result) {\n        return result;\n      }\n    }\n\n    if (this.edge_) {\n      for (let i = 0; i < segmentsLength; ++i) {\n        let vertex = null;\n        const segmentData = segments[i];\n        if (segmentData.feature.getGeometry().getType() === 'Circle') {\n          let circleGeometry = segmentData.feature.getGeometry();\n          const userProjection = getUserProjection();\n          if (userProjection) {\n            circleGeometry = circleGeometry\n              .clone()\n              .transform(userProjection, projection);\n          }\n          vertex = closestOnCircle(\n            projectedCoordinate,\n            /** @type {import(\"../geom/Circle.js\").default} */ (circleGeometry)\n          );\n        } else {\n          const [segmentStart, segmentEnd] = segmentData.segment;\n          // points have only one coordinate\n          if (segmentEnd) {\n            tempSegment[0] = fromUserCoordinate(segmentStart, projection);\n            tempSegment[1] = fromUserCoordinate(segmentEnd, projection);\n            vertex = closestOnSegment(projectedCoordinate, tempSegment);\n          }\n        }\n        if (vertex) {\n          const delta = squaredDistance(projectedCoordinate, vertex);\n          if (delta < minSquaredDistance) {\n            closestVertex = toUserCoordinate(vertex, projection);\n            minSquaredDistance = delta;\n          }\n        }\n      }\n\n      const result = getResult();\n      if (result) {\n        return result;\n      }\n    }\n\n    return null;\n  }\n\n  /**\n   * @param {import(\"../Feature.js\").default} feature Feature\n   * @private\n   */\n  updateFeature_(feature) {\n    this.removeFeature(feature, false);\n    this.addFeature(feature, false);\n  }\n\n  /**\n   * @param {Array<Array<import('../coordinate.js').Coordinate>>} segments Segments\n   * @param {import(\"../geom/Circle.js\").default} geometry Geometry.\n   * @private\n   */\n  segmentCircleGeometry_(segments, geometry) {\n    const projection = this.getMap().getView().getProjection();\n    let circleGeometry = geometry;\n    const userProjection = getUserProjection();\n    if (userProjection) {\n      circleGeometry = /** @type {import(\"../geom/Circle.js\").default} */ (\n        circleGeometry.clone().transform(userProjection, projection)\n      );\n    }\n    const polygon = fromCircle(circleGeometry);\n    if (userProjection) {\n      polygon.transform(projection, userProjection);\n    }\n    const coordinates = polygon.getCoordinates()[0];\n    for (let i = 0, ii = coordinates.length - 1; i < ii; ++i) {\n      segments.push(coordinates.slice(i, i + 2));\n    }\n  }\n\n  /**\n   * @param {Array<Array<import('../coordinate.js').Coordinate>>} segments Segments\n   * @param {import(\"../geom/GeometryCollection.js\").default} geometry Geometry.\n   * @private\n   */\n  segmentGeometryCollectionGeometry_(segments, geometry) {\n    const geometries = geometry.getGeometriesArray();\n    for (let i = 0; i < geometries.length; ++i) {\n      const segmenter = this.GEOMETRY_SEGMENTERS_[geometries[i].getType()];\n      if (segmenter) {\n        segmenter(segments, geometries[i]);\n      }\n    }\n  }\n\n  /**\n   * @param {Array<Array<import('../coordinate.js').Coordinate>>} segments Segments\n   * @param {import(\"../geom/LineString.js\").default} geometry Geometry.\n   * @private\n   */\n  segmentLineStringGeometry_(segments, geometry) {\n    const coordinates = geometry.getCoordinates();\n    for (let i = 0, ii = coordinates.length - 1; i < ii; ++i) {\n      segments.push(coordinates.slice(i, i + 2));\n    }\n  }\n\n  /**\n   * @param {Array<Array<import('../coordinate.js').Coordinate>>} segments Segments\n   * @param {import(\"../geom/MultiLineString.js\").default} geometry Geometry.\n   * @private\n   */\n  segmentMultiLineStringGeometry_(segments, geometry) {\n    const lines = geometry.getCoordinates();\n    for (let j = 0, jj = lines.length; j < jj; ++j) {\n      const coordinates = lines[j];\n      for (let i = 0, ii = coordinates.length - 1; i < ii; ++i) {\n        segments.push(coordinates.slice(i, i + 2));\n      }\n    }\n  }\n\n  /**\n   * @param {Array<Array<import('../coordinate.js').Coordinate>>} segments Segments\n   * @param {import(\"../geom/MultiPoint.js\").default} geometry Geometry.\n   * @private\n   */\n  segmentMultiPointGeometry_(segments, geometry) {\n    geometry.getCoordinates().forEach((point) => {\n      segments.push([point]);\n    });\n  }\n\n  /**\n   * @param {Array<Array<import('../coordinate.js').Coordinate>>} segments Segments\n   * @param {import(\"../geom/MultiPolygon.js\").default} geometry Geometry.\n   * @private\n   */\n  segmentMultiPolygonGeometry_(segments, geometry) {\n    const polygons = geometry.getCoordinates();\n    for (let k = 0, kk = polygons.length; k < kk; ++k) {\n      const rings = polygons[k];\n      for (let j = 0, jj = rings.length; j < jj; ++j) {\n        const coordinates = rings[j];\n        for (let i = 0, ii = coordinates.length - 1; i < ii; ++i) {\n          segments.push(coordinates.slice(i, i + 2));\n        }\n      }\n    }\n  }\n\n  /**\n   * @param {Array<Array<import('../coordinate.js').Coordinate>>} segments Segments\n   * @param {import(\"../geom/Point.js\").default} geometry Geometry.\n   * @private\n   */\n  segmentPointGeometry_(segments, geometry) {\n    segments.push([geometry.getCoordinates()]);\n  }\n\n  /**\n   * @param {Array<Array<import('../coordinate.js').Coordinate>>} segments Segments\n   * @param {import(\"../geom/Polygon.js\").default} geometry Geometry.\n   * @private\n   */\n  segmentPolygonGeometry_(segments, geometry) {\n    const rings = geometry.getCoordinates();\n    for (let j = 0, jj = rings.length; j < jj; ++j) {\n      const coordinates = rings[j];\n      for (let i = 0, ii = coordinates.length - 1; i < ii; ++i) {\n        segments.push(coordinates.slice(i, i + 2));\n      }\n    }\n  }\n}\n\nexport default Snap;\n","/**\n * @module ol/interaction/Translate\n */\nimport Collection from '../Collection.js';\nimport Event from '../events/Event.js';\nimport Feature from '../Feature.js';\nimport InteractionProperty from './Property.js';\nimport PointerInteraction from './Pointer.js';\nimport {TRUE} from '../functions.js';\nimport {always} from '../events/condition.js';\nimport {fromUserCoordinate, getUserProjection} from '../proj.js';\n\n/**\n * @enum {string}\n */\nconst TranslateEventType = {\n  /**\n   * Triggered upon feature translation start.\n   * @event TranslateEvent#translatestart\n   * @api\n   */\n  TRANSLATESTART: 'translatestart',\n  /**\n   * Triggered upon feature translation.\n   * @event TranslateEvent#translating\n   * @api\n   */\n  TRANSLATING: 'translating',\n  /**\n   * Triggered upon feature translation end.\n   * @event TranslateEvent#translateend\n   * @api\n   */\n  TRANSLATEEND: 'translateend',\n};\n\n/**\n * A function that takes an {@link module:ol/Feature~Feature} or\n * {@link module:ol/render/Feature~RenderFeature} and an\n * {@link module:ol/layer/Layer~Layer} and returns `true` if the feature may be\n * translated or `false` otherwise.\n * @typedef {function(Feature, import(\"../layer/Layer.js\").default<import(\"../source/Source\").default>):boolean} FilterFunction\n */\n\n/**\n * @typedef {Object} Options\n * @property {import(\"../events/condition.js\").Condition} [condition] A function that\n * takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a\n * boolean to indicate whether that event should be handled.\n * Default is {@link module:ol/events/condition.always}.\n * @property {Collection<Feature>} [features] Features contained in this collection will be able to be translated together.\n * @property {Array<import(\"../layer/Layer.js\").default>|function(import(\"../layer/Layer.js\").default<import(\"../source/Source\").default>): boolean} [layers] A list of layers from which features should be\n * translated. Alternatively, a filter function can be provided. The\n * function will be called for each layer in the map and should return\n * `true` for layers that you want to be translatable. If the option is\n * absent, all visible layers will be considered translatable.\n * Not used if `features` is provided.\n * @property {FilterFunction} [filter] A function\n * that takes an {@link module:ol/Feature~Feature} and an\n * {@link module:ol/layer/Layer~Layer} and returns `true` if the feature may be\n * translated or `false` otherwise. Not used if `features` is provided.\n * @property {number} [hitTolerance=0] Hit-detection tolerance. Pixels inside the radius around the given position\n * will be checked for features.\n */\n\n/**\n * @classdesc\n * Events emitted by {@link module:ol/interaction/Translate~Translate} instances\n * are instances of this type.\n */\nexport class TranslateEvent extends Event {\n  /**\n   * @param {TranslateEventType} type Type.\n   * @param {Collection<Feature>} features The features translated.\n   * @param {import(\"../coordinate.js\").Coordinate} coordinate The event coordinate.\n   * @param {import(\"../coordinate.js\").Coordinate} startCoordinate The original coordinates before.translation started\n   * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n   */\n  constructor(type, features, coordinate, startCoordinate, mapBrowserEvent) {\n    super(type);\n\n    /**\n     * The features being translated.\n     * @type {Collection<Feature>}\n     * @api\n     */\n    this.features = features;\n\n    /**\n     * The coordinate of the drag event.\n     * @const\n     * @type {import(\"../coordinate.js\").Coordinate}\n     * @api\n     */\n    this.coordinate = coordinate;\n\n    /**\n     * The coordinate of the start position before translation started.\n     * @const\n     * @type {import(\"../coordinate.js\").Coordinate}\n     * @api\n     */\n    this.startCoordinate = startCoordinate;\n\n    /**\n     * Associated {@link module:ol/MapBrowserEvent~MapBrowserEvent}.\n     * @type {import(\"../MapBrowserEvent.js\").default}\n     * @api\n     */\n    this.mapBrowserEvent = mapBrowserEvent;\n  }\n}\n\n/***\n * @template Return\n * @typedef {import(\"../Observable\").OnSignature<import(\"../Observable\").EventTypes, import(\"../events/Event.js\").default, Return> &\n *   import(\"../Observable\").OnSignature<import(\"../ObjectEventType\").Types|\n *     'change:active', import(\"../Object\").ObjectEvent, Return> &\n *   import(\"../Observable\").OnSignature<'translateend'|'translatestart'|'translating', TranslateEvent, Return> &\n *   import(\"../Observable\").CombinedOnSignature<import(\"../Observable\").EventTypes|import(\"../ObjectEventType\").Types|\n *     'change:active'|'translateend'|'translatestart'|'translating', Return>} TranslateOnSignature\n */\n\n/**\n * @classdesc\n * Interaction for translating (moving) features.\n * If you want to translate multiple features in a single action (for example,\n * the collection used by a select interaction), construct the interaction with\n * the `features` option.\n *\n * @fires TranslateEvent\n * @api\n */\nclass Translate extends PointerInteraction {\n  /**\n   * @param {Options} [options] Options.\n   */\n  constructor(options) {\n    options = options ? options : {};\n\n    super(/** @type {import(\"./Pointer.js\").Options} */ (options));\n\n    /***\n     * @type {TranslateOnSignature<import(\"../events\").EventsKey>}\n     */\n    this.on;\n\n    /***\n     * @type {TranslateOnSignature<import(\"../events\").EventsKey>}\n     */\n    this.once;\n\n    /***\n     * @type {TranslateOnSignature<void>}\n     */\n    this.un;\n\n    /**\n     * The last position we translated to.\n     * @type {import(\"../coordinate.js\").Coordinate}\n     * @private\n     */\n    this.lastCoordinate_ = null;\n\n    /**\n     * The start position before translation started.\n     * @type {import(\"../coordinate.js\").Coordinate}\n     * @private\n     */\n    this.startCoordinate_ = null;\n\n    /**\n     * @type {Collection<Feature>|null}\n     * @private\n     */\n    this.features_ = options.features !== undefined ? options.features : null;\n\n    /** @type {function(import(\"../layer/Layer.js\").default<import(\"../source/Source\").default>): boolean} */\n    let layerFilter;\n    if (options.layers && !this.features_) {\n      if (typeof options.layers === 'function') {\n        layerFilter = options.layers;\n      } else {\n        const layers = options.layers;\n        layerFilter = function (layer) {\n          return layers.includes(layer);\n        };\n      }\n    } else {\n      layerFilter = TRUE;\n    }\n\n    /**\n     * @private\n     * @type {function(import(\"../layer/Layer.js\").default<import(\"../source/Source\").default>): boolean}\n     */\n    this.layerFilter_ = layerFilter;\n\n    /**\n     * @private\n     * @type {FilterFunction}\n     */\n    this.filter_ = options.filter && !this.features_ ? options.filter : TRUE;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.hitTolerance_ = options.hitTolerance ? options.hitTolerance : 0;\n\n    /**\n     * @private\n     * @type {import(\"../events/condition.js\").Condition}\n     */\n    this.condition_ = options.condition ? options.condition : always;\n\n    /**\n     * @type {Feature}\n     * @private\n     */\n    this.lastFeature_ = null;\n\n    this.addChangeListener(\n      InteractionProperty.ACTIVE,\n      this.handleActiveChanged_\n    );\n  }\n\n  /**\n   * Handle pointer down events.\n   * @param {import(\"../MapBrowserEvent.js\").default} event Event.\n   * @return {boolean} If the event was consumed.\n   */\n  handleDownEvent(event) {\n    if (!event.originalEvent || !this.condition_(event)) {\n      return false;\n    }\n    this.lastFeature_ = this.featuresAtPixel_(event.pixel, event.map);\n    if (!this.lastCoordinate_ && this.lastFeature_) {\n      this.startCoordinate_ = event.coordinate;\n      this.lastCoordinate_ = event.coordinate;\n      this.handleMoveEvent(event);\n\n      const features = this.features_ || new Collection([this.lastFeature_]);\n\n      this.dispatchEvent(\n        new TranslateEvent(\n          TranslateEventType.TRANSLATESTART,\n          features,\n          event.coordinate,\n          this.startCoordinate_,\n          event\n        )\n      );\n      return true;\n    }\n    return false;\n  }\n\n  /**\n   * Handle pointer up events.\n   * @param {import(\"../MapBrowserEvent.js\").default} event Event.\n   * @return {boolean} If the event was consumed.\n   */\n  handleUpEvent(event) {\n    if (this.lastCoordinate_) {\n      this.lastCoordinate_ = null;\n      this.handleMoveEvent(event);\n\n      const features = this.features_ || new Collection([this.lastFeature_]);\n\n      this.dispatchEvent(\n        new TranslateEvent(\n          TranslateEventType.TRANSLATEEND,\n          features,\n          event.coordinate,\n          this.startCoordinate_,\n          event\n        )\n      );\n      // cleanup\n      this.startCoordinate_ = null;\n      return true;\n    }\n    return false;\n  }\n\n  /**\n   * Handle pointer drag events.\n   * @param {import(\"../MapBrowserEvent.js\").default} event Event.\n   */\n  handleDragEvent(event) {\n    if (this.lastCoordinate_) {\n      const newCoordinate = event.coordinate;\n      const projection = event.map.getView().getProjection();\n\n      const newViewCoordinate = fromUserCoordinate(newCoordinate, projection);\n      const lastViewCoordinate = fromUserCoordinate(\n        this.lastCoordinate_,\n        projection\n      );\n      const deltaX = newViewCoordinate[0] - lastViewCoordinate[0];\n      const deltaY = newViewCoordinate[1] - lastViewCoordinate[1];\n\n      const features = this.features_ || new Collection([this.lastFeature_]);\n      const userProjection = getUserProjection();\n\n      features.forEach(function (feature) {\n        const geom = feature.getGeometry();\n        if (userProjection) {\n          geom.transform(userProjection, projection);\n          geom.translate(deltaX, deltaY);\n          geom.transform(projection, userProjection);\n        } else {\n          geom.translate(deltaX, deltaY);\n        }\n        feature.setGeometry(geom);\n      });\n\n      this.lastCoordinate_ = newCoordinate;\n\n      this.dispatchEvent(\n        new TranslateEvent(\n          TranslateEventType.TRANSLATING,\n          features,\n          newCoordinate,\n          this.startCoordinate_,\n          event\n        )\n      );\n    }\n  }\n\n  /**\n   * Handle pointer move events.\n   * @param {import(\"../MapBrowserEvent.js\").default} event Event.\n   */\n  handleMoveEvent(event) {\n    const elem = event.map.getViewport();\n\n    // Change the cursor to grab/grabbing if hovering any of the features managed\n    // by the interaction\n    if (this.featuresAtPixel_(event.pixel, event.map)) {\n      elem.classList.remove(this.lastCoordinate_ ? 'ol-grab' : 'ol-grabbing');\n      elem.classList.add(this.lastCoordinate_ ? 'ol-grabbing' : 'ol-grab');\n    } else {\n      elem.classList.remove('ol-grab', 'ol-grabbing');\n    }\n  }\n\n  /**\n   * Tests to see if the given coordinates intersects any of our selected\n   * features.\n   * @param {import(\"../pixel.js\").Pixel} pixel Pixel coordinate to test for intersection.\n   * @param {import(\"../Map.js\").default} map Map to test the intersection on.\n   * @return {Feature} Returns the feature found at the specified pixel\n   * coordinates.\n   * @private\n   */\n  featuresAtPixel_(pixel, map) {\n    return map.forEachFeatureAtPixel(\n      pixel,\n      (feature, layer) => {\n        if (!(feature instanceof Feature) || !this.filter_(feature, layer)) {\n          return undefined;\n        }\n        if (this.features_ && !this.features_.getArray().includes(feature)) {\n          return undefined;\n        }\n        return feature;\n      },\n      {\n        layerFilter: this.layerFilter_,\n        hitTolerance: this.hitTolerance_,\n      }\n    );\n  }\n\n  /**\n   * Returns the Hit-detection tolerance.\n   * @return {number} Hit tolerance in pixels.\n   * @api\n   */\n  getHitTolerance() {\n    return this.hitTolerance_;\n  }\n\n  /**\n   * Hit-detection tolerance. Pixels inside the radius around the given position\n   * will be checked for features.\n   * @param {number} hitTolerance Hit tolerance in pixels.\n   * @api\n   */\n  setHitTolerance(hitTolerance) {\n    this.hitTolerance_ = hitTolerance;\n  }\n\n  /**\n   * Remove the interaction from its current map and attach it to the new map.\n   * Subclasses may set up event handlers to get notified about changes to\n   * the map here.\n   * @param {import(\"../Map.js\").default} map Map.\n   */\n  setMap(map) {\n    const oldMap = this.getMap();\n    super.setMap(map);\n    this.updateState_(oldMap);\n  }\n\n  /**\n   * @private\n   */\n  handleActiveChanged_() {\n    this.updateState_(null);\n  }\n\n  /**\n   * @param {import(\"../Map.js\").default} oldMap Old map.\n   * @private\n   */\n  updateState_(oldMap) {\n    let map = this.getMap();\n    const active = this.getActive();\n    if (!map || !active) {\n      map = map || oldMap;\n      if (map) {\n        const elem = map.getViewport();\n        elem.classList.remove('ol-grab', 'ol-grabbing');\n      }\n    }\n  }\n}\n\nexport default Translate;\n","/**\n * @module ol/geom/flat/flip\n */\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {Array<number>} [dest] Destination.\n * @param {number} [destOffset] Destination offset.\n * @return {Array<number>} Flat coordinates.\n */\nexport function flipXY(flatCoordinates, offset, end, stride, dest, destOffset) {\n  if (dest !== undefined) {\n    dest = dest;\n    destOffset = destOffset !== undefined ? destOffset : 0;\n  } else {\n    dest = [];\n    destOffset = 0;\n  }\n  let j = offset;\n  while (j < end) {\n    const x = flatCoordinates[j++];\n    dest[destOffset++] = flatCoordinates[j++];\n    dest[destOffset++] = x;\n    for (let k = 2; k < stride; ++k) {\n      dest[destOffset++] = flatCoordinates[j++];\n    }\n  }\n  dest.length = destOffset;\n  return dest;\n}\n","/**\n * @module ol/format/JSONFeature\n */\nimport FeatureFormat from './Feature.js';\nimport {abstract} from '../util.js';\n\n/**\n * @classdesc\n * Abstract base class; normally only used for creating subclasses and not\n * instantiated in apps.\n * Base class for JSON feature formats.\n *\n * @abstract\n */\nclass JSONFeature extends FeatureFormat {\n  constructor() {\n    super();\n  }\n\n  /**\n   * @return {import(\"./Feature.js\").Type} Format.\n   */\n  getType() {\n    return 'json';\n  }\n\n  /**\n   * Read a feature.  Only works for a single feature. Use `readFeatures` to\n   * read a feature collection.\n   *\n   * @param {ArrayBuffer|Document|Element|Object|string} source Source.\n   * @param {import(\"./Feature.js\").ReadOptions} [options] Read options.\n   * @return {import(\"../Feature.js\").default} Feature.\n   * @api\n   */\n  readFeature(source, options) {\n    return this.readFeatureFromObject(\n      getObject(source),\n      this.getReadOptions(source, options)\n    );\n  }\n\n  /**\n   * Read all features.  Works with both a single feature and a feature\n   * collection.\n   *\n   * @param {ArrayBuffer|Document|Element|Object|string} source Source.\n   * @param {import(\"./Feature.js\").ReadOptions} [options] Read options.\n   * @return {Array<import(\"../Feature.js\").default>} Features.\n   * @api\n   */\n  readFeatures(source, options) {\n    return this.readFeaturesFromObject(\n      getObject(source),\n      this.getReadOptions(source, options)\n    );\n  }\n\n  /**\n   * @abstract\n   * @param {Object} object Object.\n   * @param {import(\"./Feature.js\").ReadOptions} [options] Read options.\n   * @protected\n   * @return {import(\"../Feature.js\").default} Feature.\n   */\n  readFeatureFromObject(object, options) {\n    return abstract();\n  }\n\n  /**\n   * @abstract\n   * @param {Object} object Object.\n   * @param {import(\"./Feature.js\").ReadOptions} [options] Read options.\n   * @protected\n   * @return {Array<import(\"../Feature.js\").default>} Features.\n   */\n  readFeaturesFromObject(object, options) {\n    return abstract();\n  }\n\n  /**\n   * Read a geometry.\n   *\n   * @param {ArrayBuffer|Document|Element|Object|string} source Source.\n   * @param {import(\"./Feature.js\").ReadOptions} [options] Read options.\n   * @return {import(\"../geom/Geometry.js\").default} Geometry.\n   * @api\n   */\n  readGeometry(source, options) {\n    return this.readGeometryFromObject(\n      getObject(source),\n      this.getReadOptions(source, options)\n    );\n  }\n\n  /**\n   * @abstract\n   * @param {Object} object Object.\n   * @param {import(\"./Feature.js\").ReadOptions} [options] Read options.\n   * @protected\n   * @return {import(\"../geom/Geometry.js\").default} Geometry.\n   */\n  readGeometryFromObject(object, options) {\n    return abstract();\n  }\n\n  /**\n   * Read the projection.\n   *\n   * @param {ArrayBuffer|Document|Element|Object|string} source Source.\n   * @return {import(\"../proj/Projection.js\").default} Projection.\n   * @api\n   */\n  readProjection(source) {\n    return this.readProjectionFromObject(getObject(source));\n  }\n\n  /**\n   * @abstract\n   * @param {Object} object Object.\n   * @protected\n   * @return {import(\"../proj/Projection.js\").default} Projection.\n   */\n  readProjectionFromObject(object) {\n    return abstract();\n  }\n\n  /**\n   * Encode a feature as string.\n   *\n   * @param {import(\"../Feature.js\").default} feature Feature.\n   * @param {import(\"./Feature.js\").WriteOptions} [options] Write options.\n   * @return {string} Encoded feature.\n   * @api\n   */\n  writeFeature(feature, options) {\n    return JSON.stringify(this.writeFeatureObject(feature, options));\n  }\n\n  /**\n   * @abstract\n   * @param {import(\"../Feature.js\").default} feature Feature.\n   * @param {import(\"./Feature.js\").WriteOptions} [options] Write options.\n   * @return {Object} Object.\n   */\n  writeFeatureObject(feature, options) {\n    return abstract();\n  }\n\n  /**\n   * Encode an array of features as string.\n   *\n   * @param {Array<import(\"../Feature.js\").default>} features Features.\n   * @param {import(\"./Feature.js\").WriteOptions} [options] Write options.\n   * @return {string} Encoded features.\n   * @api\n   */\n  writeFeatures(features, options) {\n    return JSON.stringify(this.writeFeaturesObject(features, options));\n  }\n\n  /**\n   * @abstract\n   * @param {Array<import(\"../Feature.js\").default>} features Features.\n   * @param {import(\"./Feature.js\").WriteOptions} [options] Write options.\n   * @return {Object} Object.\n   */\n  writeFeaturesObject(features, options) {\n    return abstract();\n  }\n\n  /**\n   * Encode a geometry as string.\n   *\n   * @param {import(\"../geom/Geometry.js\").default} geometry Geometry.\n   * @param {import(\"./Feature.js\").WriteOptions} [options] Write options.\n   * @return {string} Encoded geometry.\n   * @api\n   */\n  writeGeometry(geometry, options) {\n    return JSON.stringify(this.writeGeometryObject(geometry, options));\n  }\n\n  /**\n   * @abstract\n   * @param {import(\"../geom/Geometry.js\").default} geometry Geometry.\n   * @param {import(\"./Feature.js\").WriteOptions} [options] Write options.\n   * @return {Object} Object.\n   */\n  writeGeometryObject(geometry, options) {\n    return abstract();\n  }\n}\n\n/**\n * @param {Document|Element|Object|string} source Source.\n * @return {Object} Object.\n */\nfunction getObject(source) {\n  if (typeof source === 'string') {\n    const object = JSON.parse(source);\n    return object ? /** @type {Object} */ (object) : null;\n  }\n  if (source !== null) {\n    return source;\n  }\n  return null;\n}\n\nexport default JSONFeature;\n","/**\n * @module ol/format/EsriJSON\n */\nimport Feature from '../Feature.js';\nimport JSONFeature from './JSONFeature.js';\nimport LineString from '../geom/LineString.js';\nimport LinearRing from '../geom/LinearRing.js';\nimport MultiLineString from '../geom/MultiLineString.js';\nimport MultiPoint from '../geom/MultiPoint.js';\nimport MultiPolygon from '../geom/MultiPolygon.js';\nimport Point from '../geom/Point.js';\nimport Polygon from '../geom/Polygon.js';\nimport {assert} from '../asserts.js';\nimport {containsExtent} from '../extent.js';\nimport {deflateCoordinates} from '../geom/flat/deflate.js';\nimport {get as getProjection} from '../proj.js';\nimport {isEmpty} from '../obj.js';\nimport {linearRingIsClockwise} from '../geom/flat/orient.js';\nimport {transformGeometryWithOptions} from './Feature.js';\n\n/**\n * @typedef {import(\"arcgis-rest-api\").Feature} EsriJSONFeature\n * @typedef {import(\"arcgis-rest-api\").FeatureSet} EsriJSONFeatureSet\n * @typedef {import(\"arcgis-rest-api\").Geometry} EsriJSONGeometry\n * @typedef {import(\"arcgis-rest-api\").Point} EsriJSONPoint\n * @typedef {import(\"arcgis-rest-api\").Polyline} EsriJSONPolyline\n * @typedef {import(\"arcgis-rest-api\").Polygon} EsriJSONPolygon\n * @typedef {import(\"arcgis-rest-api\").Multipoint} EsriJSONMultipoint\n * @typedef {import(\"arcgis-rest-api\").HasZM} EsriJSONHasZM\n * @typedef {import(\"arcgis-rest-api\").Position} EsriJSONPosition\n * @typedef {import(\"arcgis-rest-api\").SpatialReferenceWkid} EsriJSONSpatialReferenceWkid\n */\n\n/**\n * @typedef {Object} EsriJSONMultiPolygon\n * @property {Array<Array<Array<Array<number>>>>} rings Rings for the MultiPolygon.\n * @property {boolean} [hasM] If the polygon coordinates have an M value.\n * @property {boolean} [hasZ] If the polygon coordinates have a Z value.\n * @property {EsriJSONSpatialReferenceWkid} [spatialReference] The coordinate reference system.\n */\n\n/**\n * @const\n * @type {Object<import(\"../geom/Geometry.js\").Type, function(EsriJSONGeometry): import(\"../geom/Geometry.js\").default>}\n */\nconst GEOMETRY_READERS = {\n  Point: readPointGeometry,\n  LineString: readLineStringGeometry,\n  Polygon: readPolygonGeometry,\n  MultiPoint: readMultiPointGeometry,\n  MultiLineString: readMultiLineStringGeometry,\n  MultiPolygon: readMultiPolygonGeometry,\n};\n\n/**\n * @const\n * @type {Object<import(\"../geom/Geometry.js\").Type, function(import(\"../geom/Geometry.js\").default, import(\"./Feature.js\").WriteOptions=): (EsriJSONGeometry)>}\n */\nconst GEOMETRY_WRITERS = {\n  Point: writePointGeometry,\n  LineString: writeLineStringGeometry,\n  Polygon: writePolygonGeometry,\n  MultiPoint: writeMultiPointGeometry,\n  MultiLineString: writeMultiLineStringGeometry,\n  MultiPolygon: writeMultiPolygonGeometry,\n};\n\n/**\n * @typedef {Object} Options\n * @property {string} [geometryName] Geometry name to use when creating features.\n */\n\n/**\n * @classdesc\n * Feature format for reading and writing data in the EsriJSON format.\n *\n * @api\n */\nclass EsriJSON extends JSONFeature {\n  /**\n   * @param {Options} [options] Options.\n   */\n  constructor(options) {\n    options = options ? options : {};\n\n    super();\n\n    /**\n     * Name of the geometry attribute for features.\n     * @type {string|undefined}\n     * @private\n     */\n    this.geometryName_ = options.geometryName;\n  }\n\n  /**\n   * @param {Object} object Object.\n   * @param {import(\"./Feature.js\").ReadOptions} [options] Read options.\n   * @param {string} [idField] Name of the field where to get the id from.\n   * @protected\n   * @return {import(\"../Feature.js\").default} Feature.\n   */\n  readFeatureFromObject(object, options, idField) {\n    const esriJSONFeature = /** @type {EsriJSONFeature} */ (object);\n    const geometry = readGeometry(esriJSONFeature.geometry, options);\n    const feature = new Feature();\n    if (this.geometryName_) {\n      feature.setGeometryName(this.geometryName_);\n    }\n    feature.setGeometry(geometry);\n    if (esriJSONFeature.attributes) {\n      feature.setProperties(esriJSONFeature.attributes, true);\n      const id = esriJSONFeature.attributes[idField];\n      if (id !== undefined) {\n        feature.setId(/** @type {number} */ (id));\n      }\n    }\n    return feature;\n  }\n\n  /**\n   * @param {Object} object Object.\n   * @param {import(\"./Feature.js\").ReadOptions} [options] Read options.\n   * @protected\n   * @return {Array<Feature>} Features.\n   */\n  readFeaturesFromObject(object, options) {\n    options = options ? options : {};\n    if (object['features']) {\n      const esriJSONFeatureSet = /** @type {EsriJSONFeatureSet} */ (object);\n      /** @type {Array<import(\"../Feature.js\").default>} */\n      const features = [];\n      const esriJSONFeatures = esriJSONFeatureSet.features;\n      for (let i = 0, ii = esriJSONFeatures.length; i < ii; ++i) {\n        features.push(\n          this.readFeatureFromObject(\n            esriJSONFeatures[i],\n            options,\n            object.objectIdFieldName\n          )\n        );\n      }\n      return features;\n    }\n    return [this.readFeatureFromObject(object, options)];\n  }\n\n  /**\n   * @param {EsriJSONGeometry} object Object.\n   * @param {import(\"./Feature.js\").ReadOptions} [options] Read options.\n   * @protected\n   * @return {import(\"../geom/Geometry.js\").default} Geometry.\n   */\n  readGeometryFromObject(object, options) {\n    return readGeometry(object, options);\n  }\n\n  /**\n   * @param {Object} object Object.\n   * @protected\n   * @return {import(\"../proj/Projection.js\").default} Projection.\n   */\n  readProjectionFromObject(object) {\n    if (\n      object['spatialReference'] &&\n      object['spatialReference']['wkid'] !== undefined\n    ) {\n      const spatialReference = /** @type {EsriJSONSpatialReferenceWkid} */ (\n        object['spatialReference']\n      );\n      const crs = spatialReference.wkid;\n      return getProjection('EPSG:' + crs);\n    }\n    return null;\n  }\n\n  /**\n   * Encode a geometry as a EsriJSON object.\n   *\n   * @param {import(\"../geom/Geometry.js\").default} geometry Geometry.\n   * @param {import(\"./Feature.js\").WriteOptions} [options] Write options.\n   * @return {EsriJSONGeometry} Object.\n   * @api\n   */\n  writeGeometryObject(geometry, options) {\n    return writeGeometry(geometry, this.adaptOptions(options));\n  }\n\n  /**\n   * Encode a feature as a esriJSON Feature object.\n   *\n   * @param {import(\"../Feature.js\").default} feature Feature.\n   * @param {import(\"./Feature.js\").WriteOptions} [options] Write options.\n   * @return {Object} Object.\n   * @api\n   */\n  writeFeatureObject(feature, options) {\n    options = this.adaptOptions(options);\n    const object = {};\n    if (!feature.hasProperties()) {\n      object['attributes'] = {};\n      return object;\n    }\n    const properties = feature.getProperties();\n    const geometry = feature.getGeometry();\n    if (geometry) {\n      object['geometry'] = writeGeometry(geometry, options);\n      const projection =\n        options && (options.dataProjection || options.featureProjection);\n      if (projection) {\n        object['geometry']['spatialReference'] =\n          /** @type {EsriJSONSpatialReferenceWkid} */ ({\n            wkid: Number(getProjection(projection).getCode().split(':').pop()),\n          });\n      }\n      delete properties[feature.getGeometryName()];\n    }\n    if (!isEmpty(properties)) {\n      object['attributes'] = properties;\n    } else {\n      object['attributes'] = {};\n    }\n    return object;\n  }\n\n  /**\n   * Encode an array of features as a EsriJSON object.\n   *\n   * @param {Array<import(\"../Feature.js\").default>} features Features.\n   * @param {import(\"./Feature.js\").WriteOptions} [options] Write options.\n   * @return {EsriJSONFeatureSet} EsriJSON Object.\n   * @api\n   */\n  writeFeaturesObject(features, options) {\n    options = this.adaptOptions(options);\n    const objects = [];\n    for (let i = 0, ii = features.length; i < ii; ++i) {\n      objects.push(this.writeFeatureObject(features[i], options));\n    }\n    return {\n      'features': objects,\n    };\n  }\n}\n\n/**\n * @param {EsriJSONGeometry} object Object.\n * @param {import(\"./Feature.js\").ReadOptions} [options] Read options.\n * @return {import(\"../geom/Geometry.js\").default} Geometry.\n */\nfunction readGeometry(object, options) {\n  if (!object) {\n    return null;\n  }\n  /** @type {import(\"../geom/Geometry.js\").Type} */\n  let type;\n  if (typeof object['x'] === 'number' && typeof object['y'] === 'number') {\n    type = 'Point';\n  } else if (object['points']) {\n    type = 'MultiPoint';\n  } else if (object['paths']) {\n    const esriJSONPolyline = /** @type {EsriJSONPolyline} */ (object);\n    if (esriJSONPolyline.paths.length === 1) {\n      type = 'LineString';\n    } else {\n      type = 'MultiLineString';\n    }\n  } else if (object['rings']) {\n    const esriJSONPolygon = /** @type {EsriJSONPolygon} */ (object);\n    const layout = getGeometryLayout(esriJSONPolygon);\n    const rings = convertRings(esriJSONPolygon.rings, layout);\n    if (rings.length === 1) {\n      type = 'Polygon';\n      object = Object.assign({}, object, {['rings']: rings[0]});\n    } else {\n      type = 'MultiPolygon';\n      object = Object.assign({}, object, {['rings']: rings});\n    }\n  }\n  const geometryReader = GEOMETRY_READERS[type];\n  return transformGeometryWithOptions(geometryReader(object), false, options);\n}\n\n/**\n * Determines inner and outer rings.\n * Checks if any polygons in this array contain any other polygons in this\n * array. It is used for checking for holes.\n * Logic inspired by: https://github.com/Esri/terraformer-arcgis-parser\n * @param {Array<!Array<!Array<number>>>} rings Rings.\n * @param {import(\"../geom/Geometry.js\").GeometryLayout} layout Geometry layout.\n * @return {Array<!Array<!Array<!Array<number>>>>} Transformed rings.\n */\nfunction convertRings(rings, layout) {\n  const flatRing = [];\n  const outerRings = [];\n  const holes = [];\n  let i, ii;\n  for (i = 0, ii = rings.length; i < ii; ++i) {\n    flatRing.length = 0;\n    deflateCoordinates(flatRing, 0, rings[i], layout.length);\n    // is this ring an outer ring? is it clockwise?\n    const clockwise = linearRingIsClockwise(\n      flatRing,\n      0,\n      flatRing.length,\n      layout.length\n    );\n    if (clockwise) {\n      outerRings.push([rings[i]]);\n    } else {\n      holes.push(rings[i]);\n    }\n  }\n  while (holes.length) {\n    const hole = holes.shift();\n    let matched = false;\n    // loop over all outer rings and see if they contain our hole.\n    for (i = outerRings.length - 1; i >= 0; i--) {\n      const outerRing = outerRings[i][0];\n      const containsHole = containsExtent(\n        new LinearRing(outerRing).getExtent(),\n        new LinearRing(hole).getExtent()\n      );\n      if (containsHole) {\n        // the hole is contained push it into our polygon\n        outerRings[i].push(hole);\n        matched = true;\n        break;\n      }\n    }\n    if (!matched) {\n      // no outer rings contain this hole turn it into and outer\n      // ring (reverse it)\n      outerRings.push([hole.reverse()]);\n    }\n  }\n  return outerRings;\n}\n\n/**\n * @param {EsriJSONPoint} object Object.\n * @return {import(\"../geom/Geometry.js\").default} Point.\n */\nfunction readPointGeometry(object) {\n  let point;\n  if (object.m !== undefined && object.z !== undefined) {\n    point = new Point([object.x, object.y, object.z, object.m], 'XYZM');\n  } else if (object.z !== undefined) {\n    point = new Point([object.x, object.y, object.z], 'XYZ');\n  } else if (object.m !== undefined) {\n    point = new Point([object.x, object.y, object.m], 'XYM');\n  } else {\n    point = new Point([object.x, object.y]);\n  }\n  return point;\n}\n\n/**\n * @param {EsriJSONPolyline} object Object.\n * @return {import(\"../geom/Geometry.js\").default} LineString.\n */\nfunction readLineStringGeometry(object) {\n  const layout = getGeometryLayout(object);\n  return new LineString(object.paths[0], layout);\n}\n\n/**\n * @param {EsriJSONPolyline} object Object.\n * @return {import(\"../geom/Geometry.js\").default} MultiLineString.\n */\nfunction readMultiLineStringGeometry(object) {\n  const layout = getGeometryLayout(object);\n  return new MultiLineString(object.paths, layout);\n}\n\n/**\n * @param {EsriJSONHasZM} object Object.\n * @return {import(\"../geom/Geometry.js\").GeometryLayout} The geometry layout to use.\n */\nfunction getGeometryLayout(object) {\n  /** @type {import(\"../geom/Geometry.js\").GeometryLayout} */\n  let layout = 'XY';\n  if (object.hasZ === true && object.hasM === true) {\n    layout = 'XYZM';\n  } else if (object.hasZ === true) {\n    layout = 'XYZ';\n  } else if (object.hasM === true) {\n    layout = 'XYM';\n  }\n  return layout;\n}\n\n/**\n * @param {EsriJSONMultipoint} object Object.\n * @return {import(\"../geom/Geometry.js\").default} MultiPoint.\n */\nfunction readMultiPointGeometry(object) {\n  const layout = getGeometryLayout(object);\n  return new MultiPoint(object.points, layout);\n}\n\n/**\n * @param {EsriJSONMultiPolygon} object Object.\n * @return {import(\"../geom/Geometry.js\").default} MultiPolygon.\n */\nfunction readMultiPolygonGeometry(object) {\n  const layout = getGeometryLayout(object);\n  return new MultiPolygon(object.rings, layout);\n}\n\n/**\n * @param {EsriJSONPolygon} object Object.\n * @return {import(\"../geom/Geometry.js\").default} Polygon.\n */\nfunction readPolygonGeometry(object) {\n  const layout = getGeometryLayout(object);\n  return new Polygon(object.rings, layout);\n}\n\n/**\n * @param {import(\"../geom/Point.js\").default} geometry Geometry.\n * @param {import(\"./Feature.js\").WriteOptions} [options] Write options.\n * @return {EsriJSONPoint} EsriJSON geometry.\n */\nfunction writePointGeometry(geometry, options) {\n  const coordinates = geometry.getCoordinates();\n  /** @type {EsriJSONPoint} */\n  let esriJSON;\n  const layout = geometry.getLayout();\n  if (layout === 'XYZ') {\n    esriJSON = {\n      x: coordinates[0],\n      y: coordinates[1],\n      z: coordinates[2],\n    };\n  } else if (layout === 'XYM') {\n    esriJSON = {\n      x: coordinates[0],\n      y: coordinates[1],\n      m: coordinates[2],\n    };\n  } else if (layout === 'XYZM') {\n    esriJSON = {\n      x: coordinates[0],\n      y: coordinates[1],\n      z: coordinates[2],\n      m: coordinates[3],\n    };\n  } else if (layout === 'XY') {\n    esriJSON = {\n      x: coordinates[0],\n      y: coordinates[1],\n    };\n  } else {\n    assert(false, 34); // Invalid geometry layout\n  }\n  return esriJSON;\n}\n\n/**\n * @param {import(\"../geom/SimpleGeometry.js\").default} geometry Geometry.\n * @return {Object} Object with boolean hasZ and hasM keys.\n */\nfunction getHasZM(geometry) {\n  const layout = geometry.getLayout();\n  return {\n    hasZ: layout === 'XYZ' || layout === 'XYZM',\n    hasM: layout === 'XYM' || layout === 'XYZM',\n  };\n}\n\n/**\n * @param {import(\"../geom/LineString.js\").default} lineString Geometry.\n * @param {import(\"./Feature.js\").WriteOptions} [options] Write options.\n * @return {EsriJSONPolyline} EsriJSON geometry.\n */\nfunction writeLineStringGeometry(lineString, options) {\n  const hasZM = getHasZM(lineString);\n  return {\n    hasZ: hasZM.hasZ,\n    hasM: hasZM.hasM,\n    paths: [\n      /** @type {Array<EsriJSONPosition>} */ (lineString.getCoordinates()),\n    ],\n  };\n}\n\n/**\n * @param {import(\"../geom/Polygon.js\").default} polygon Geometry.\n * @param {import(\"./Feature.js\").WriteOptions} [options] Write options.\n * @return {EsriJSONPolygon} EsriJSON geometry.\n */\nfunction writePolygonGeometry(polygon, options) {\n  // Esri geometries use the left-hand rule\n  const hasZM = getHasZM(polygon);\n  return {\n    hasZ: hasZM.hasZ,\n    hasM: hasZM.hasM,\n    rings: /** @type {Array<Array<EsriJSONPosition>>} */ (\n      polygon.getCoordinates(false)\n    ),\n  };\n}\n\n/**\n * @param {import(\"../geom/MultiLineString.js\").default} multiLineString Geometry.\n * @param {import(\"./Feature.js\").WriteOptions} [options] Write options.\n * @return {EsriJSONPolyline} EsriJSON geometry.\n */\nfunction writeMultiLineStringGeometry(multiLineString, options) {\n  const hasZM = getHasZM(multiLineString);\n  return {\n    hasZ: hasZM.hasZ,\n    hasM: hasZM.hasM,\n    paths: /** @type {Array<Array<EsriJSONPosition>>} */ (\n      multiLineString.getCoordinates()\n    ),\n  };\n}\n\n/**\n * @param {import(\"../geom/MultiPoint.js\").default} multiPoint Geometry.\n * @param {import(\"./Feature.js\").WriteOptions} [options] Write options.\n * @return {EsriJSONMultipoint} EsriJSON geometry.\n */\nfunction writeMultiPointGeometry(multiPoint, options) {\n  const hasZM = getHasZM(multiPoint);\n  return {\n    hasZ: hasZM.hasZ,\n    hasM: hasZM.hasM,\n    points: /** @type {Array<EsriJSONPosition>} */ (\n      multiPoint.getCoordinates()\n    ),\n  };\n}\n\n/**\n * @param {import(\"../geom/MultiPolygon.js\").default} geometry Geometry.\n * @param {import(\"./Feature.js\").WriteOptions} [options] Write options.\n * @return {EsriJSONPolygon} EsriJSON geometry.\n */\nfunction writeMultiPolygonGeometry(geometry, options) {\n  const hasZM = getHasZM(geometry);\n  const coordinates = geometry.getCoordinates(false);\n  const output = [];\n  for (let i = 0; i < coordinates.length; i++) {\n    for (let x = coordinates[i].length - 1; x >= 0; x--) {\n      output.push(coordinates[i][x]);\n    }\n  }\n  return {\n    hasZ: hasZM.hasZ,\n    hasM: hasZM.hasM,\n    rings: /** @type {Array<Array<EsriJSONPosition>>} */ (output),\n  };\n}\n\n/**\n * @param {import(\"../geom/Geometry.js\").default} geometry Geometry.\n * @param {import(\"./Feature.js\").WriteOptions} [options] Write options.\n * @return {EsriJSONGeometry} EsriJSON geometry.\n */\nfunction writeGeometry(geometry, options) {\n  const geometryWriter = GEOMETRY_WRITERS[geometry.getType()];\n  return geometryWriter(\n    transformGeometryWithOptions(geometry, true, options),\n    options\n  );\n}\n\nexport default EsriJSON;\n","/**\n * @module ol/format/XMLFeature\n */\nimport FeatureFormat from '../format/Feature.js';\nimport {abstract} from '../util.js';\nimport {extend} from '../array.js';\nimport {getXMLSerializer, isDocument, parse} from '../xml.js';\n\n/**\n * @classdesc\n * Abstract base class; normally only used for creating subclasses and not\n * instantiated in apps.\n * Base class for XML feature formats.\n *\n * @abstract\n */\nclass XMLFeature extends FeatureFormat {\n  constructor() {\n    super();\n\n    /**\n     * @type {XMLSerializer}\n     * @private\n     */\n    this.xmlSerializer_ = getXMLSerializer();\n  }\n\n  /**\n   * @return {import(\"./Feature.js\").Type} Format.\n   */\n  getType() {\n    return 'xml';\n  }\n\n  /**\n   * Read a single feature.\n   *\n   * @param {Document|Element|Object|string} source Source.\n   * @param {import(\"./Feature.js\").ReadOptions} [options] Read options.\n   * @return {import(\"../Feature.js\").default} Feature.\n   * @api\n   */\n  readFeature(source, options) {\n    if (!source) {\n      return null;\n    }\n    if (typeof source === 'string') {\n      const doc = parse(source);\n      return this.readFeatureFromDocument(doc, options);\n    }\n    if (isDocument(source)) {\n      return this.readFeatureFromDocument(\n        /** @type {Document} */ (source),\n        options\n      );\n    }\n    return this.readFeatureFromNode(/** @type {Element} */ (source), options);\n  }\n\n  /**\n   * @param {Document} doc Document.\n   * @param {import(\"./Feature.js\").ReadOptions} [options] Options.\n   * @return {import(\"../Feature.js\").default} Feature.\n   */\n  readFeatureFromDocument(doc, options) {\n    const features = this.readFeaturesFromDocument(doc, options);\n    if (features.length > 0) {\n      return features[0];\n    }\n    return null;\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {import(\"./Feature.js\").ReadOptions} [options] Options.\n   * @return {import(\"../Feature.js\").default} Feature.\n   */\n  readFeatureFromNode(node, options) {\n    return null; // not implemented\n  }\n\n  /**\n   * Read all features from a feature collection.\n   *\n   * @param {Document|Element|Object|string} source Source.\n   * @param {import(\"./Feature.js\").ReadOptions} [options] Options.\n   * @return {Array<import(\"../Feature.js\").default>} Features.\n   * @api\n   */\n  readFeatures(source, options) {\n    if (!source) {\n      return [];\n    }\n    if (typeof source === 'string') {\n      const doc = parse(source);\n      return this.readFeaturesFromDocument(doc, options);\n    }\n    if (isDocument(source)) {\n      return this.readFeaturesFromDocument(\n        /** @type {Document} */ (source),\n        options\n      );\n    }\n    return this.readFeaturesFromNode(/** @type {Element} */ (source), options);\n  }\n\n  /**\n   * @param {Document} doc Document.\n   * @param {import(\"./Feature.js\").ReadOptions} [options] Options.\n   * @protected\n   * @return {Array<import(\"../Feature.js\").default>} Features.\n   */\n  readFeaturesFromDocument(doc, options) {\n    /** @type {Array<import(\"../Feature.js\").default>} */\n    const features = [];\n    for (let n = doc.firstChild; n; n = n.nextSibling) {\n      if (n.nodeType == Node.ELEMENT_NODE) {\n        extend(\n          features,\n          this.readFeaturesFromNode(/** @type {Element} */ (n), options)\n        );\n      }\n    }\n    return features;\n  }\n\n  /**\n   * @abstract\n   * @param {Element} node Node.\n   * @param {import(\"./Feature.js\").ReadOptions} [options] Options.\n   * @protected\n   * @return {Array<import(\"../Feature.js\").default>} Features.\n   */\n  readFeaturesFromNode(node, options) {\n    return abstract();\n  }\n\n  /**\n   * Read a single geometry from a source.\n   *\n   * @param {Document|Element|Object|string} source Source.\n   * @param {import(\"./Feature.js\").ReadOptions} [options] Read options.\n   * @return {import(\"../geom/Geometry.js\").default} Geometry.\n   */\n  readGeometry(source, options) {\n    if (!source) {\n      return null;\n    }\n    if (typeof source === 'string') {\n      const doc = parse(source);\n      return this.readGeometryFromDocument(doc, options);\n    }\n    if (isDocument(source)) {\n      return this.readGeometryFromDocument(\n        /** @type {Document} */ (source),\n        options\n      );\n    }\n    return this.readGeometryFromNode(/** @type {Element} */ (source), options);\n  }\n\n  /**\n   * @param {Document} doc Document.\n   * @param {import(\"./Feature.js\").ReadOptions} [options] Options.\n   * @protected\n   * @return {import(\"../geom/Geometry.js\").default} Geometry.\n   */\n  readGeometryFromDocument(doc, options) {\n    return null; // not implemented\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {import(\"./Feature.js\").ReadOptions} [options] Options.\n   * @protected\n   * @return {import(\"../geom/Geometry.js\").default} Geometry.\n   */\n  readGeometryFromNode(node, options) {\n    return null; // not implemented\n  }\n\n  /**\n   * Read the projection from the source.\n   *\n   * @param {Document|Element|Object|string} source Source.\n   * @return {import(\"../proj/Projection.js\").default} Projection.\n   * @api\n   */\n  readProjection(source) {\n    if (!source) {\n      return null;\n    }\n    if (typeof source === 'string') {\n      const doc = parse(source);\n      return this.readProjectionFromDocument(doc);\n    }\n    if (isDocument(source)) {\n      return this.readProjectionFromDocument(/** @type {Document} */ (source));\n    }\n    return this.readProjectionFromNode(/** @type {Element} */ (source));\n  }\n\n  /**\n   * @param {Document} doc Document.\n   * @protected\n   * @return {import(\"../proj/Projection.js\").default} Projection.\n   */\n  readProjectionFromDocument(doc) {\n    return this.dataProjection;\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @protected\n   * @return {import(\"../proj/Projection.js\").default} Projection.\n   */\n  readProjectionFromNode(node) {\n    return this.dataProjection;\n  }\n\n  /**\n   * Encode a feature as string.\n   *\n   * @param {import(\"../Feature.js\").default} feature Feature.\n   * @param {import(\"./Feature.js\").WriteOptions} [options] Write options.\n   * @return {string} Encoded feature.\n   */\n  writeFeature(feature, options) {\n    const node = this.writeFeatureNode(feature, options);\n    return this.xmlSerializer_.serializeToString(node);\n  }\n\n  /**\n   * @param {import(\"../Feature.js\").default} feature Feature.\n   * @param {import(\"./Feature.js\").WriteOptions} [options] Options.\n   * @protected\n   * @return {Node} Node.\n   */\n  writeFeatureNode(feature, options) {\n    return null; // not implemented\n  }\n\n  /**\n   * Encode an array of features as string.\n   *\n   * @param {Array<import(\"../Feature.js\").default>} features Features.\n   * @param {import(\"./Feature.js\").WriteOptions} [options] Write options.\n   * @return {string} Result.\n   * @api\n   */\n  writeFeatures(features, options) {\n    const node = this.writeFeaturesNode(features, options);\n    return this.xmlSerializer_.serializeToString(node);\n  }\n\n  /**\n   * @param {Array<import(\"../Feature.js\").default>} features Features.\n   * @param {import(\"./Feature.js\").WriteOptions} [options] Options.\n   * @return {Node} Node.\n   */\n  writeFeaturesNode(features, options) {\n    return null; // not implemented\n  }\n\n  /**\n   * Encode a geometry as string.\n   *\n   * @param {import(\"../geom/Geometry.js\").default} geometry Geometry.\n   * @param {import(\"./Feature.js\").WriteOptions} [options] Write options.\n   * @return {string} Encoded geometry.\n   */\n  writeGeometry(geometry, options) {\n    const node = this.writeGeometryNode(geometry, options);\n    return this.xmlSerializer_.serializeToString(node);\n  }\n\n  /**\n   * @param {import(\"../geom/Geometry.js\").default} geometry Geometry.\n   * @param {import(\"./Feature.js\").WriteOptions} [options] Options.\n   * @return {Node} Node.\n   */\n  writeGeometryNode(geometry, options) {\n    return null; // not implemented\n  }\n}\n\nexport default XMLFeature;\n","/**\n * @module ol/format/GMLBase\n */\n// FIXME Envelopes should not be treated as geometries! readEnvelope_ is part\n// of GEOMETRY_PARSERS_ and methods using GEOMETRY_PARSERS_ do not expect\n// envelopes/extents, only geometries!\nimport Feature from '../Feature.js';\nimport Geometry from '../geom/Geometry.js';\nimport LineString from '../geom/LineString.js';\nimport LinearRing from '../geom/LinearRing.js';\nimport MultiLineString from '../geom/MultiLineString.js';\nimport MultiPoint from '../geom/MultiPoint.js';\nimport MultiPolygon from '../geom/MultiPolygon.js';\nimport Point from '../geom/Point.js';\nimport Polygon from '../geom/Polygon.js';\nimport XMLFeature from './XMLFeature.js';\nimport {extend} from '../array.js';\nimport {\n  getAllTextContent,\n  getAttributeNS,\n  makeArrayPusher,\n  makeReplacer,\n  parseNode,\n  pushParseAndPop,\n} from '../xml.js';\nimport {get as getProjection} from '../proj.js';\nimport {\n  transformExtentWithOptions,\n  transformGeometryWithOptions,\n} from './Feature.js';\n\n/**\n * @const\n * @type {string}\n */\nexport const GMLNS = 'http://www.opengis.net/gml';\n\n/**\n * A regular expression that matches if a string only contains whitespace\n * characters. It will e.g. match `''`, `' '`, `'\\n'` etc.\n *\n * @const\n * @type {RegExp}\n */\nconst ONLY_WHITESPACE_RE = /^\\s*$/;\n\n/**\n * @typedef {Object} Options\n * @property {Object<string, string>|string} [featureNS] Feature\n * namespace. If not defined will be derived from GML. If multiple\n * feature types have been configured which come from different feature\n * namespaces, this will be an object with the keys being the prefixes used\n * in the entries of featureType array. The values of the object will be the\n * feature namespaces themselves. So for instance there might be a featureType\n * item `topp:states` in the `featureType` array and then there will be a key\n * `topp` in the featureNS object with value `http://www.openplans.org/topp`.\n * @property {Array<string>|string} [featureType] Feature type(s) to parse.\n * If multiple feature types need to be configured\n * which come from different feature namespaces, `featureNS` will be an object\n * with the keys being the prefixes used in the entries of featureType array.\n * The values of the object will be the feature namespaces themselves.\n * So for instance there might be a featureType item `topp:states` and then\n * there will be a key named `topp` in the featureNS object with value\n * `http://www.openplans.org/topp`.\n * @property {string} [srsName] srsName to use when writing geometries.\n * @property {boolean} [surface=false] Write gml:Surface instead of gml:Polygon\n * elements. This also affects the elements in multi-part geometries.\n * @property {boolean} [curve=false] Write gml:Curve instead of gml:LineString\n * elements. This also affects the elements in multi-part geometries.\n * @property {boolean} [multiCurve=true] Write gml:MultiCurve instead of gml:MultiLineString.\n * Since the latter is deprecated in GML 3.\n * @property {boolean} [multiSurface=true] Write gml:multiSurface instead of\n * gml:MultiPolygon. Since the latter is deprecated in GML 3.\n * @property {string} [schemaLocation] Optional schemaLocation to use when\n * writing out the GML, this will override the default provided.\n * @property {boolean} [hasZ=false] If coordinates have a Z value.\n */\n\n/**\n * @classdesc\n * Abstract base class; normally only used for creating subclasses and not\n * instantiated in apps.\n * Feature base format for reading and writing data in the GML format.\n * This class cannot be instantiated, it contains only base content that\n * is shared with versioned format classes GML2 and GML3.\n *\n * @abstract\n * @api\n */\nclass GMLBase extends XMLFeature {\n  /**\n   * @param {Options} [options] Optional configuration object.\n   */\n  constructor(options) {\n    super();\n\n    options = options ? options : {};\n\n    /**\n     * @protected\n     * @type {Array<string>|string|undefined}\n     */\n    this.featureType = options.featureType;\n\n    /**\n     * @protected\n     * @type {Object<string, string>|string|undefined}\n     */\n    this.featureNS = options.featureNS;\n\n    /**\n     * @protected\n     * @type {string|undefined}\n     */\n    this.srsName = options.srsName;\n\n    /**\n     * @protected\n     * @type {string}\n     */\n    this.schemaLocation = '';\n\n    /**\n     * @type {Object<string, Object<string, Object>>}\n     */\n    this.FEATURE_COLLECTION_PARSERS = {};\n    this.FEATURE_COLLECTION_PARSERS[this.namespace] = {\n      'featureMember': makeArrayPusher(this.readFeaturesInternal),\n      'featureMembers': makeReplacer(this.readFeaturesInternal),\n    };\n\n    this.supportedMediaTypes = ['application/gml+xml'];\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {Array<*>} objectStack Object stack.\n   * @return {Array<Feature> | undefined} Features.\n   */\n  readFeaturesInternal(node, objectStack) {\n    const localName = node.localName;\n    let features = null;\n    if (localName == 'FeatureCollection') {\n      features = pushParseAndPop(\n        [],\n        this.FEATURE_COLLECTION_PARSERS,\n        node,\n        objectStack,\n        this\n      );\n    } else if (\n      localName == 'featureMembers' ||\n      localName == 'featureMember' ||\n      localName == 'member'\n    ) {\n      const context = objectStack[0];\n      let featureType = context['featureType'];\n      let featureNS = context['featureNS'];\n      const prefix = 'p';\n      const defaultPrefix = 'p0';\n      if (!featureType && node.childNodes) {\n        (featureType = []), (featureNS = {});\n        for (let i = 0, ii = node.childNodes.length; i < ii; ++i) {\n          const child = /** @type {Element} */ (node.childNodes[i]);\n          if (child.nodeType === 1) {\n            const ft = child.nodeName.split(':').pop();\n            if (!featureType.includes(ft)) {\n              let key = '';\n              let count = 0;\n              const uri = child.namespaceURI;\n              for (const candidate in featureNS) {\n                if (featureNS[candidate] === uri) {\n                  key = candidate;\n                  break;\n                }\n                ++count;\n              }\n              if (!key) {\n                key = prefix + count;\n                featureNS[key] = uri;\n              }\n              featureType.push(key + ':' + ft);\n            }\n          }\n        }\n        if (localName != 'featureMember') {\n          // recheck featureType for each featureMember\n          context['featureType'] = featureType;\n          context['featureNS'] = featureNS;\n        }\n      }\n      if (typeof featureNS === 'string') {\n        const ns = featureNS;\n        featureNS = {};\n        featureNS[defaultPrefix] = ns;\n      }\n      /** @type {Object<string, Object<string, import(\"../xml.js\").Parser>>} */\n      const parsersNS = {};\n      const featureTypes = Array.isArray(featureType)\n        ? featureType\n        : [featureType];\n      for (const p in featureNS) {\n        /** @type {Object<string, import(\"../xml.js\").Parser>} */\n        const parsers = {};\n        for (let i = 0, ii = featureTypes.length; i < ii; ++i) {\n          const featurePrefix = featureTypes[i].includes(':')\n            ? featureTypes[i].split(':')[0]\n            : defaultPrefix;\n          if (featurePrefix === p) {\n            parsers[featureTypes[i].split(':').pop()] =\n              localName == 'featureMembers'\n                ? makeArrayPusher(this.readFeatureElement, this)\n                : makeReplacer(this.readFeatureElement, this);\n          }\n        }\n        parsersNS[featureNS[p]] = parsers;\n      }\n      if (localName == 'featureMember' || localName == 'member') {\n        features = pushParseAndPop(undefined, parsersNS, node, objectStack);\n      } else {\n        features = pushParseAndPop([], parsersNS, node, objectStack);\n      }\n    }\n    if (features === null) {\n      features = [];\n    }\n    return features;\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {Array<*>} objectStack Object stack.\n   * @return {import(\"../geom/Geometry.js\").default|import(\"../extent.js\").Extent|undefined} Geometry.\n   */\n  readGeometryOrExtent(node, objectStack) {\n    const context = /** @type {Object} */ (objectStack[0]);\n    context['srsName'] = node.firstElementChild.getAttribute('srsName');\n    context['srsDimension'] =\n      node.firstElementChild.getAttribute('srsDimension');\n    return pushParseAndPop(\n      null,\n      this.GEOMETRY_PARSERS,\n      node,\n      objectStack,\n      this\n    );\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {Array<*>} objectStack Object stack.\n   * @return {import(\"../extent.js\").Extent|undefined} Geometry.\n   */\n  readExtentElement(node, objectStack) {\n    const context = /** @type {Object} */ (objectStack[0]);\n    const extent = /** @type {import(\"../extent.js\").Extent} */ (\n      this.readGeometryOrExtent(node, objectStack)\n    );\n    return extent ? transformExtentWithOptions(extent, context) : undefined;\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {Array<*>} objectStack Object stack.\n   * @return {import(\"../geom/Geometry.js\").default|undefined} Geometry.\n   */\n  readGeometryElement(node, objectStack) {\n    const context = /** @type {Object} */ (objectStack[0]);\n    const geometry = /** @type {import(\"../geom/Geometry.js\").default} */ (\n      this.readGeometryOrExtent(node, objectStack)\n    );\n    return geometry\n      ? transformGeometryWithOptions(geometry, false, context)\n      : undefined;\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {Array<*>} objectStack Object stack.\n   * @param {boolean} asFeature whether result should be wrapped as a feature.\n   * @return {Feature|Object} Feature\n   */\n  readFeatureElementInternal(node, objectStack, asFeature) {\n    let geometryName;\n    const values = {};\n    for (let n = node.firstElementChild; n; n = n.nextElementSibling) {\n      let value;\n      const localName = n.localName;\n      // first, check if it is simple attribute\n      if (\n        n.childNodes.length === 0 ||\n        (n.childNodes.length === 1 &&\n          (n.firstChild.nodeType === 3 || n.firstChild.nodeType === 4))\n      ) {\n        value = getAllTextContent(n, false);\n        if (ONLY_WHITESPACE_RE.test(value)) {\n          value = undefined;\n        }\n      } else {\n        if (asFeature) {\n          //if feature, try it as a geometry or extent\n          value =\n            localName === 'boundedBy'\n              ? this.readExtentElement(n, objectStack)\n              : this.readGeometryElement(n, objectStack);\n        }\n        if (!value) {\n          //if not a geometry or not a feature, treat it as a complex attribute\n          value = this.readFeatureElementInternal(n, objectStack, false);\n        } else if (localName !== 'boundedBy') {\n          // boundedBy is an extent and must not be considered as a geometry\n          geometryName = localName;\n        }\n      }\n\n      const len = n.attributes.length;\n      if (len > 0 && !(value instanceof Geometry)) {\n        value = {_content_: value};\n        for (let i = 0; i < len; i++) {\n          const attName = n.attributes[i].name;\n          value[attName] = n.attributes[i].value;\n        }\n      }\n\n      if (values[localName]) {\n        if (!(values[localName] instanceof Array)) {\n          values[localName] = [values[localName]];\n        }\n        values[localName].push(value);\n      } else {\n        values[localName] = value;\n      }\n    }\n    if (!asFeature) {\n      return values;\n    }\n    const feature = new Feature(values);\n    if (geometryName) {\n      feature.setGeometryName(geometryName);\n    }\n    const fid =\n      node.getAttribute('fid') || getAttributeNS(node, this.namespace, 'id');\n    if (fid) {\n      feature.setId(fid);\n    }\n    return feature;\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {Array<*>} objectStack Object stack.\n   * @return {Feature} Feature.\n   */\n  readFeatureElement(node, objectStack) {\n    return this.readFeatureElementInternal(node, objectStack, true);\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {Array<*>} objectStack Object stack.\n   * @return {Point|undefined} Point.\n   */\n  readPoint(node, objectStack) {\n    const flatCoordinates = this.readFlatCoordinatesFromNode(node, objectStack);\n    if (flatCoordinates) {\n      return new Point(flatCoordinates, 'XYZ');\n    }\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {Array<*>} objectStack Object stack.\n   * @return {MultiPoint|undefined} MultiPoint.\n   */\n  readMultiPoint(node, objectStack) {\n    /** @type {Array<Array<number>>} */\n    const coordinates = pushParseAndPop(\n      [],\n      this.MULTIPOINT_PARSERS,\n      node,\n      objectStack,\n      this\n    );\n    if (coordinates) {\n      return new MultiPoint(coordinates);\n    }\n    return undefined;\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {Array<*>} objectStack Object stack.\n   * @return {MultiLineString|undefined} MultiLineString.\n   */\n  readMultiLineString(node, objectStack) {\n    /** @type {Array<LineString>} */\n    const lineStrings = pushParseAndPop(\n      [],\n      this.MULTILINESTRING_PARSERS,\n      node,\n      objectStack,\n      this\n    );\n    if (lineStrings) {\n      return new MultiLineString(lineStrings);\n    }\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {Array<*>} objectStack Object stack.\n   * @return {MultiPolygon|undefined} MultiPolygon.\n   */\n  readMultiPolygon(node, objectStack) {\n    /** @type {Array<Polygon>} */\n    const polygons = pushParseAndPop(\n      [],\n      this.MULTIPOLYGON_PARSERS,\n      node,\n      objectStack,\n      this\n    );\n    if (polygons) {\n      return new MultiPolygon(polygons);\n    }\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {Array<*>} objectStack Object stack.\n   */\n  pointMemberParser(node, objectStack) {\n    parseNode(this.POINTMEMBER_PARSERS, node, objectStack, this);\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {Array<*>} objectStack Object stack.\n   */\n  lineStringMemberParser(node, objectStack) {\n    parseNode(this.LINESTRINGMEMBER_PARSERS, node, objectStack, this);\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {Array<*>} objectStack Object stack.\n   */\n  polygonMemberParser(node, objectStack) {\n    parseNode(this.POLYGONMEMBER_PARSERS, node, objectStack, this);\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {Array<*>} objectStack Object stack.\n   * @return {LineString|undefined} LineString.\n   */\n  readLineString(node, objectStack) {\n    const flatCoordinates = this.readFlatCoordinatesFromNode(node, objectStack);\n    if (flatCoordinates) {\n      const lineString = new LineString(flatCoordinates, 'XYZ');\n      return lineString;\n    }\n    return undefined;\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {Array<*>} objectStack Object stack.\n   * @return {Array<number>|undefined} LinearRing flat coordinates.\n   */\n  readFlatLinearRing(node, objectStack) {\n    const ring = pushParseAndPop(\n      null,\n      this.GEOMETRY_FLAT_COORDINATES_PARSERS,\n      node,\n      objectStack,\n      this\n    );\n    if (ring) {\n      return ring;\n    }\n    return undefined;\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {Array<*>} objectStack Object stack.\n   * @return {LinearRing|undefined} LinearRing.\n   */\n  readLinearRing(node, objectStack) {\n    const flatCoordinates = this.readFlatCoordinatesFromNode(node, objectStack);\n    if (flatCoordinates) {\n      return new LinearRing(flatCoordinates, 'XYZ');\n    }\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {Array<*>} objectStack Object stack.\n   * @return {Polygon|undefined} Polygon.\n   */\n  readPolygon(node, objectStack) {\n    /** @type {Array<Array<number>>} */\n    const flatLinearRings = pushParseAndPop(\n      [null],\n      this.FLAT_LINEAR_RINGS_PARSERS,\n      node,\n      objectStack,\n      this\n    );\n    if (flatLinearRings && flatLinearRings[0]) {\n      const flatCoordinates = flatLinearRings[0];\n      const ends = [flatCoordinates.length];\n      let i, ii;\n      for (i = 1, ii = flatLinearRings.length; i < ii; ++i) {\n        extend(flatCoordinates, flatLinearRings[i]);\n        ends.push(flatCoordinates.length);\n      }\n      return new Polygon(flatCoordinates, 'XYZ', ends);\n    }\n    return undefined;\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {Array<*>} objectStack Object stack.\n   * @return {Array<number>} Flat coordinates.\n   */\n  readFlatCoordinatesFromNode(node, objectStack) {\n    return pushParseAndPop(\n      null,\n      this.GEOMETRY_FLAT_COORDINATES_PARSERS,\n      node,\n      objectStack,\n      this\n    );\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {import(\"./Feature.js\").ReadOptions} [options] Options.\n   * @protected\n   * @return {import(\"../geom/Geometry.js\").default} Geometry.\n   */\n  readGeometryFromNode(node, options) {\n    const geometry = this.readGeometryElement(node, [\n      this.getReadOptions(node, options ? options : {}),\n    ]);\n    return geometry ? geometry : null;\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {import(\"./Feature.js\").ReadOptions} [options] Options.\n   * @return {Array<import(\"../Feature.js\").default>} Features.\n   */\n  readFeaturesFromNode(node, options) {\n    const internalOptions = {\n      featureType: this.featureType,\n      featureNS: this.featureNS,\n    };\n    if (internalOptions) {\n      Object.assign(internalOptions, this.getReadOptions(node, options));\n    }\n    const features = this.readFeaturesInternal(node, [internalOptions]);\n    return features || [];\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @return {import(\"../proj/Projection.js\").default} Projection.\n   */\n  readProjectionFromNode(node) {\n    return getProjection(\n      this.srsName\n        ? this.srsName\n        : node.firstElementChild.getAttribute('srsName')\n    );\n  }\n}\n\nGMLBase.prototype.namespace = GMLNS;\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\nGMLBase.prototype.FLAT_LINEAR_RINGS_PARSERS = {\n  'http://www.opengis.net/gml': {},\n};\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\nGMLBase.prototype.GEOMETRY_FLAT_COORDINATES_PARSERS = {\n  'http://www.opengis.net/gml': {},\n};\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\nGMLBase.prototype.GEOMETRY_PARSERS = {\n  'http://www.opengis.net/gml': {},\n};\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\nGMLBase.prototype.MULTIPOINT_PARSERS = {\n  'http://www.opengis.net/gml': {\n    'pointMember': makeArrayPusher(GMLBase.prototype.pointMemberParser),\n    'pointMembers': makeArrayPusher(GMLBase.prototype.pointMemberParser),\n  },\n};\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\nGMLBase.prototype.MULTILINESTRING_PARSERS = {\n  'http://www.opengis.net/gml': {\n    'lineStringMember': makeArrayPusher(\n      GMLBase.prototype.lineStringMemberParser\n    ),\n    'lineStringMembers': makeArrayPusher(\n      GMLBase.prototype.lineStringMemberParser\n    ),\n  },\n};\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\nGMLBase.prototype.MULTIPOLYGON_PARSERS = {\n  'http://www.opengis.net/gml': {\n    'polygonMember': makeArrayPusher(GMLBase.prototype.polygonMemberParser),\n    'polygonMembers': makeArrayPusher(GMLBase.prototype.polygonMemberParser),\n  },\n};\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\nGMLBase.prototype.POINTMEMBER_PARSERS = {\n  'http://www.opengis.net/gml': {\n    'Point': makeArrayPusher(GMLBase.prototype.readFlatCoordinatesFromNode),\n  },\n};\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\nGMLBase.prototype.LINESTRINGMEMBER_PARSERS = {\n  'http://www.opengis.net/gml': {\n    'LineString': makeArrayPusher(GMLBase.prototype.readLineString),\n  },\n};\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\nGMLBase.prototype.POLYGONMEMBER_PARSERS = {\n  'http://www.opengis.net/gml': {\n    'Polygon': makeArrayPusher(GMLBase.prototype.readPolygon),\n  },\n};\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\nGMLBase.prototype.RING_PARSERS = {\n  'http://www.opengis.net/gml': {\n    'LinearRing': makeReplacer(GMLBase.prototype.readFlatLinearRing),\n  },\n};\n\nexport default GMLBase;\n","/**\n * @module ol/format/xsd\n */\nimport {getAllTextContent, getDocument} from '../xml.js';\nimport {padNumber} from '../string.js';\n\n/**\n * @param {Node} node Node.\n * @return {boolean|undefined} Boolean.\n */\nexport function readBoolean(node) {\n  const s = getAllTextContent(node, false);\n  return readBooleanString(s);\n}\n\n/**\n * @param {string} string String.\n * @return {boolean|undefined} Boolean.\n */\nexport function readBooleanString(string) {\n  const m = /^\\s*(true|1)|(false|0)\\s*$/.exec(string);\n  if (m) {\n    return m[1] !== undefined || false;\n  }\n  return undefined;\n}\n\n/**\n * @param {Node} node Node.\n * @return {number|undefined} DateTime in seconds.\n */\nexport function readDateTime(node) {\n  const s = getAllTextContent(node, false);\n  const dateTime = Date.parse(s);\n  return isNaN(dateTime) ? undefined : dateTime / 1000;\n}\n\n/**\n * @param {Node} node Node.\n * @return {number|undefined} Decimal.\n */\nexport function readDecimal(node) {\n  const s = getAllTextContent(node, false);\n  return readDecimalString(s);\n}\n\n/**\n * @param {string} string String.\n * @return {number|undefined} Decimal.\n */\nexport function readDecimalString(string) {\n  // FIXME check spec\n  const m = /^\\s*([+\\-]?\\d*\\.?\\d+(?:e[+\\-]?\\d+)?)\\s*$/i.exec(string);\n  if (m) {\n    return parseFloat(m[1]);\n  }\n  return undefined;\n}\n\n/**\n * @param {Node} node Node.\n * @return {number|undefined} Non negative integer.\n */\nexport function readPositiveInteger(node) {\n  const s = getAllTextContent(node, false);\n  return readNonNegativeIntegerString(s);\n}\n\n/**\n * @param {string} string String.\n * @return {number|undefined} Non negative integer.\n */\nexport function readNonNegativeIntegerString(string) {\n  const m = /^\\s*(\\d+)\\s*$/.exec(string);\n  if (m) {\n    return parseInt(m[1], 10);\n  }\n  return undefined;\n}\n\n/**\n * @param {Node} node Node.\n * @return {string|undefined} String.\n */\nexport function readString(node) {\n  return getAllTextContent(node, false).trim();\n}\n\n/**\n * @param {Node} node Node to append a TextNode with the boolean to.\n * @param {boolean} bool Boolean.\n */\nexport function writeBooleanTextNode(node, bool) {\n  writeStringTextNode(node, bool ? '1' : '0');\n}\n\n/**\n * @param {Node} node Node to append a CDATA Section with the string to.\n * @param {string} string String.\n */\nexport function writeCDATASection(node, string) {\n  node.appendChild(getDocument().createCDATASection(string));\n}\n\n/**\n * @param {Node} node Node to append a TextNode with the dateTime to.\n * @param {number} dateTime DateTime in seconds.\n */\nexport function writeDateTimeTextNode(node, dateTime) {\n  const date = new Date(dateTime * 1000);\n  const string =\n    date.getUTCFullYear() +\n    '-' +\n    padNumber(date.getUTCMonth() + 1, 2) +\n    '-' +\n    padNumber(date.getUTCDate(), 2) +\n    'T' +\n    padNumber(date.getUTCHours(), 2) +\n    ':' +\n    padNumber(date.getUTCMinutes(), 2) +\n    ':' +\n    padNumber(date.getUTCSeconds(), 2) +\n    'Z';\n  node.appendChild(getDocument().createTextNode(string));\n}\n\n/**\n * @param {Node} node Node to append a TextNode with the decimal to.\n * @param {number} decimal Decimal.\n */\nexport function writeDecimalTextNode(node, decimal) {\n  const string = decimal.toPrecision();\n  node.appendChild(getDocument().createTextNode(string));\n}\n\n/**\n * @param {Node} node Node to append a TextNode with the decimal to.\n * @param {number} nonNegativeInteger Non negative integer.\n */\nexport function writeNonNegativeIntegerTextNode(node, nonNegativeInteger) {\n  const string = nonNegativeInteger.toString();\n  node.appendChild(getDocument().createTextNode(string));\n}\n\n/**\n * @param {Node} node Node to append a TextNode with the string to.\n * @param {string} string String.\n */\nexport function writeStringTextNode(node, string) {\n  node.appendChild(getDocument().createTextNode(string));\n}\n","/**\n * @module ol/format/GML2\n */\nimport GMLBase, {GMLNS} from './GMLBase.js';\nimport {\n  OBJECT_PROPERTY_NODE_FACTORY,\n  createElementNS,\n  getAllTextContent,\n  makeArrayPusher,\n  makeChildAppender,\n  makeReplacer,\n  makeSimpleNodeFactory,\n  pushParseAndPop,\n  pushSerializeAndPop,\n} from '../xml.js';\nimport {createOrUpdate} from '../extent.js';\nimport {get as getProjection} from '../proj.js';\nimport {\n  transformExtentWithOptions,\n  transformGeometryWithOptions,\n} from './Feature.js';\nimport {writeStringTextNode} from './xsd.js';\n\n/**\n * @const\n * @type {string}\n */\nconst schemaLocation =\n  GMLNS + ' http://schemas.opengis.net/gml/2.1.2/feature.xsd';\n\n/**\n * @const\n * @type {Object<string, string>}\n */\nconst MULTIGEOMETRY_TO_MEMBER_NODENAME = {\n  'MultiLineString': 'lineStringMember',\n  'MultiCurve': 'curveMember',\n  'MultiPolygon': 'polygonMember',\n  'MultiSurface': 'surfaceMember',\n};\n\n/**\n * @classdesc\n * Feature format for reading and writing data in the GML format,\n * version 2.1.2.\n *\n * @api\n */\nclass GML2 extends GMLBase {\n  /**\n   * @param {import(\"./GMLBase.js\").Options} [options] Optional configuration object.\n   */\n  constructor(options) {\n    options = options ? options : {};\n\n    super(options);\n\n    this.FEATURE_COLLECTION_PARSERS[GMLNS]['featureMember'] = makeArrayPusher(\n      this.readFeaturesInternal\n    );\n\n    /**\n     * @type {string}\n     */\n    this.schemaLocation = options.schemaLocation\n      ? options.schemaLocation\n      : schemaLocation;\n  }\n\n  /**\n   * @param {Node} node Node.\n   * @param {Array<*>} objectStack Object stack.\n   * @return {Array<number>|undefined} Flat coordinates.\n   */\n  readFlatCoordinates(node, objectStack) {\n    const s = getAllTextContent(node, false).replace(/^\\s*|\\s*$/g, '');\n    const context = /** @type {import(\"../xml.js\").NodeStackItem} */ (\n      objectStack[0]\n    );\n    const containerSrs = context['srsName'];\n    let axisOrientation = 'enu';\n    if (containerSrs) {\n      const proj = getProjection(containerSrs);\n      if (proj) {\n        axisOrientation = proj.getAxisOrientation();\n      }\n    }\n    const coordsGroups = s.trim().split(/\\s+/);\n    const flatCoordinates = [];\n    for (let i = 0, ii = coordsGroups.length; i < ii; i++) {\n      const coords = coordsGroups[i].split(/,+/);\n      const x = parseFloat(coords[0]);\n      const y = parseFloat(coords[1]);\n      const z = coords.length === 3 ? parseFloat(coords[2]) : 0;\n      if (axisOrientation.substr(0, 2) === 'en') {\n        flatCoordinates.push(x, y, z);\n      } else {\n        flatCoordinates.push(y, x, z);\n      }\n    }\n    return flatCoordinates;\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {Array<*>} objectStack Object stack.\n   * @return {import(\"../extent.js\").Extent|undefined} Envelope.\n   */\n  readBox(node, objectStack) {\n    /** @type {Array<number>} */\n    const flatCoordinates = pushParseAndPop(\n      [null],\n      this.BOX_PARSERS_,\n      node,\n      objectStack,\n      this\n    );\n    return createOrUpdate(\n      flatCoordinates[1][0],\n      flatCoordinates[1][1],\n      flatCoordinates[1][3],\n      flatCoordinates[1][4]\n    );\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {Array<*>} objectStack Object stack.\n   */\n  innerBoundaryIsParser(node, objectStack) {\n    /** @type {Array<number>|undefined} */\n    const flatLinearRing = pushParseAndPop(\n      undefined,\n      this.RING_PARSERS,\n      node,\n      objectStack,\n      this\n    );\n    if (flatLinearRing) {\n      const flatLinearRings =\n        /** @type {Array<Array<number>>} */\n        (objectStack[objectStack.length - 1]);\n      flatLinearRings.push(flatLinearRing);\n    }\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {Array<*>} objectStack Object stack.\n   */\n  outerBoundaryIsParser(node, objectStack) {\n    /** @type {Array<number>|undefined} */\n    const flatLinearRing = pushParseAndPop(\n      undefined,\n      this.RING_PARSERS,\n      node,\n      objectStack,\n      this\n    );\n    if (flatLinearRing) {\n      const flatLinearRings =\n        /** @type {Array<Array<number>>} */\n        (objectStack[objectStack.length - 1]);\n      flatLinearRings[0] = flatLinearRing;\n    }\n  }\n\n  /**\n   * @const\n   * @param {*} value Value.\n   * @param {Array<*>} objectStack Object stack.\n   * @param {string} [nodeName] Node name.\n   * @return {Element|undefined} Node.\n   * @private\n   */\n  GEOMETRY_NODE_FACTORY_(value, objectStack, nodeName) {\n    const context = objectStack[objectStack.length - 1];\n    const multiSurface = context['multiSurface'];\n    const surface = context['surface'];\n    const multiCurve = context['multiCurve'];\n    if (!Array.isArray(value)) {\n      nodeName = /** @type {import(\"../geom/Geometry.js\").default} */ (\n        value\n      ).getType();\n      if (nodeName === 'MultiPolygon' && multiSurface === true) {\n        nodeName = 'MultiSurface';\n      } else if (nodeName === 'Polygon' && surface === true) {\n        nodeName = 'Surface';\n      } else if (nodeName === 'MultiLineString' && multiCurve === true) {\n        nodeName = 'MultiCurve';\n      }\n    } else {\n      nodeName = 'Envelope';\n    }\n    return createElementNS('http://www.opengis.net/gml', nodeName);\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {import(\"../Feature.js\").default} feature Feature.\n   * @param {Array<*>} objectStack Node stack.\n   */\n  writeFeatureElement(node, feature, objectStack) {\n    const fid = feature.getId();\n    if (fid) {\n      node.setAttribute('fid', /** @type {string} */ (fid));\n    }\n    const context = /** @type {Object} */ (objectStack[objectStack.length - 1]);\n    const featureNS = context['featureNS'];\n    const geometryName = feature.getGeometryName();\n    if (!context.serializers) {\n      context.serializers = {};\n      context.serializers[featureNS] = {};\n    }\n    const keys = [];\n    const values = [];\n    if (feature.hasProperties()) {\n      const properties = feature.getProperties();\n      for (const key in properties) {\n        const value = properties[key];\n        if (value !== null) {\n          keys.push(key);\n          values.push(value);\n          if (\n            key == geometryName ||\n            typeof (/** @type {?} */ (value).getSimplifiedGeometry) ===\n              'function'\n          ) {\n            if (!(key in context.serializers[featureNS])) {\n              context.serializers[featureNS][key] = makeChildAppender(\n                this.writeGeometryElement,\n                this\n              );\n            }\n          } else {\n            if (!(key in context.serializers[featureNS])) {\n              context.serializers[featureNS][key] =\n                makeChildAppender(writeStringTextNode);\n            }\n          }\n        }\n      }\n    }\n    const item = Object.assign({}, context);\n    item.node = node;\n    pushSerializeAndPop(\n      /** @type {import(\"../xml.js\").NodeStackItem} */\n      (item),\n      context.serializers,\n      makeSimpleNodeFactory(undefined, featureNS),\n      values,\n      objectStack,\n      keys\n    );\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {import(\"../geom/LineString.js\").default} geometry LineString geometry.\n   * @param {Array<*>} objectStack Node stack.\n   */\n  writeCurveOrLineString(node, geometry, objectStack) {\n    const context = objectStack[objectStack.length - 1];\n    const srsName = context['srsName'];\n    if (node.nodeName !== 'LineStringSegment' && srsName) {\n      node.setAttribute('srsName', srsName);\n    }\n    if (\n      node.nodeName === 'LineString' ||\n      node.nodeName === 'LineStringSegment'\n    ) {\n      const coordinates = this.createCoordinatesNode_(node.namespaceURI);\n      node.appendChild(coordinates);\n      this.writeCoordinates_(coordinates, geometry, objectStack);\n    } else if (node.nodeName === 'Curve') {\n      const segments = createElementNS(node.namespaceURI, 'segments');\n      node.appendChild(segments);\n      this.writeCurveSegments_(segments, geometry, objectStack);\n    }\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {import(\"../geom/LineString.js\").default} line LineString geometry.\n   * @param {Array<*>} objectStack Node stack.\n   */\n  writeLineStringOrCurveMember(node, line, objectStack) {\n    const child = this.GEOMETRY_NODE_FACTORY_(line, objectStack);\n    if (child) {\n      node.appendChild(child);\n      this.writeCurveOrLineString(child, line, objectStack);\n    }\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {import(\"../geom/MultiLineString.js\").default} geometry MultiLineString geometry.\n   * @param {Array<*>} objectStack Node stack.\n   */\n  writeMultiCurveOrLineString(node, geometry, objectStack) {\n    const context = objectStack[objectStack.length - 1];\n    const hasZ = context['hasZ'];\n    const srsName = context['srsName'];\n    const curve = context['curve'];\n    if (srsName) {\n      node.setAttribute('srsName', srsName);\n    }\n    const lines = geometry.getLineStrings();\n    pushSerializeAndPop(\n      {node: node, hasZ: hasZ, srsName: srsName, curve: curve},\n      this.LINESTRINGORCURVEMEMBER_SERIALIZERS,\n      this.MULTIGEOMETRY_MEMBER_NODE_FACTORY_,\n      lines,\n      objectStack,\n      undefined,\n      this\n    );\n  }\n\n  /**\n   * @param {Node} node Node.\n   * @param {import(\"../geom/Geometry.js\").default|import(\"../extent.js\").Extent} geometry Geometry.\n   * @param {Array<*>} objectStack Node stack.\n   */\n  writeGeometryElement(node, geometry, objectStack) {\n    const context = /** @type {import(\"./Feature.js\").WriteOptions} */ (\n      objectStack[objectStack.length - 1]\n    );\n    const item = Object.assign({}, context);\n    item['node'] = node;\n    let value;\n    if (Array.isArray(geometry)) {\n      value = transformExtentWithOptions(\n        /** @type {import(\"../extent.js\").Extent} */ (geometry),\n        context\n      );\n    } else {\n      value = transformGeometryWithOptions(\n        /** @type {import(\"../geom/Geometry.js\").default} */ (geometry),\n        true,\n        context\n      );\n    }\n    pushSerializeAndPop(\n      /** @type {import(\"../xml.js\").NodeStackItem} */\n      (item),\n      this.GEOMETRY_SERIALIZERS,\n      this.GEOMETRY_NODE_FACTORY_,\n      [value],\n      objectStack,\n      undefined,\n      this\n    );\n  }\n\n  /**\n   * @param {string} namespaceURI XML namespace.\n   * @return {Element} coordinates node.\n   * @private\n   */\n  createCoordinatesNode_(namespaceURI) {\n    const coordinates = createElementNS(namespaceURI, 'coordinates');\n    coordinates.setAttribute('decimal', '.');\n    coordinates.setAttribute('cs', ',');\n    coordinates.setAttribute('ts', ' ');\n\n    return coordinates;\n  }\n\n  /**\n   * @param {Node} node Node.\n   * @param {import(\"../geom/LineString.js\").default|import(\"../geom/LinearRing.js\").default} value Geometry.\n   * @param {Array<*>} objectStack Node stack.\n   * @private\n   */\n  writeCoordinates_(node, value, objectStack) {\n    const context = objectStack[objectStack.length - 1];\n    const hasZ = context['hasZ'];\n    const srsName = context['srsName'];\n    // only 2d for simple features profile\n    const points = value.getCoordinates();\n    const len = points.length;\n    const parts = new Array(len);\n    for (let i = 0; i < len; ++i) {\n      const point = points[i];\n      parts[i] = this.getCoords_(point, srsName, hasZ);\n    }\n    writeStringTextNode(node, parts.join(' '));\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {import(\"../geom/LineString.js\").default} line LineString geometry.\n   * @param {Array<*>} objectStack Node stack.\n   * @private\n   */\n  writeCurveSegments_(node, line, objectStack) {\n    const child = createElementNS(node.namespaceURI, 'LineStringSegment');\n    node.appendChild(child);\n    this.writeCurveOrLineString(child, line, objectStack);\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {import(\"../geom/Polygon.js\").default} geometry Polygon geometry.\n   * @param {Array<*>} objectStack Node stack.\n   */\n  writeSurfaceOrPolygon(node, geometry, objectStack) {\n    const context = objectStack[objectStack.length - 1];\n    const hasZ = context['hasZ'];\n    const srsName = context['srsName'];\n    if (node.nodeName !== 'PolygonPatch' && srsName) {\n      node.setAttribute('srsName', srsName);\n    }\n    if (node.nodeName === 'Polygon' || node.nodeName === 'PolygonPatch') {\n      const rings = geometry.getLinearRings();\n      pushSerializeAndPop(\n        {node: node, hasZ: hasZ, srsName: srsName},\n        this.RING_SERIALIZERS,\n        this.RING_NODE_FACTORY_,\n        rings,\n        objectStack,\n        undefined,\n        this\n      );\n    } else if (node.nodeName === 'Surface') {\n      const patches = createElementNS(node.namespaceURI, 'patches');\n      node.appendChild(patches);\n      this.writeSurfacePatches_(patches, geometry, objectStack);\n    }\n  }\n\n  /**\n   * @param {*} value Value.\n   * @param {Array<*>} objectStack Object stack.\n   * @param {string} [nodeName] Node name.\n   * @return {Node} Node.\n   * @private\n   */\n  RING_NODE_FACTORY_(value, objectStack, nodeName) {\n    const context = objectStack[objectStack.length - 1];\n    const parentNode = context.node;\n    const exteriorWritten = context['exteriorWritten'];\n    if (exteriorWritten === undefined) {\n      context['exteriorWritten'] = true;\n    }\n    return createElementNS(\n      parentNode.namespaceURI,\n      exteriorWritten !== undefined ? 'innerBoundaryIs' : 'outerBoundaryIs'\n    );\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {import(\"../geom/Polygon.js\").default} polygon Polygon geometry.\n   * @param {Array<*>} objectStack Node stack.\n   * @private\n   */\n  writeSurfacePatches_(node, polygon, objectStack) {\n    const child = createElementNS(node.namespaceURI, 'PolygonPatch');\n    node.appendChild(child);\n    this.writeSurfaceOrPolygon(child, polygon, objectStack);\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {import(\"../geom/LinearRing.js\").default} ring LinearRing geometry.\n   * @param {Array<*>} objectStack Node stack.\n   */\n  writeRing(node, ring, objectStack) {\n    const linearRing = createElementNS(node.namespaceURI, 'LinearRing');\n    node.appendChild(linearRing);\n    this.writeLinearRing(linearRing, ring, objectStack);\n  }\n\n  /**\n   * @param {Array<number>} point Point geometry.\n   * @param {string} [srsName] Optional srsName\n   * @param {boolean} [hasZ] whether the geometry has a Z coordinate (is 3D) or not.\n   * @return {string} The coords string.\n   * @private\n   */\n  getCoords_(point, srsName, hasZ) {\n    let axisOrientation = 'enu';\n    if (srsName) {\n      axisOrientation = getProjection(srsName).getAxisOrientation();\n    }\n    let coords =\n      axisOrientation.substr(0, 2) === 'en'\n        ? point[0] + ',' + point[1]\n        : point[1] + ',' + point[0];\n    if (hasZ) {\n      // For newly created points, Z can be undefined.\n      const z = point[2] || 0;\n      coords += ',' + z;\n    }\n\n    return coords;\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {import(\"../geom/Point.js\").default} geometry Point geometry.\n   * @param {Array<*>} objectStack Node stack.\n   */\n  writePoint(node, geometry, objectStack) {\n    const context = objectStack[objectStack.length - 1];\n    const hasZ = context['hasZ'];\n    const srsName = context['srsName'];\n    if (srsName) {\n      node.setAttribute('srsName', srsName);\n    }\n    const coordinates = this.createCoordinatesNode_(node.namespaceURI);\n    node.appendChild(coordinates);\n    const point = geometry.getCoordinates();\n    const coord = this.getCoords_(point, srsName, hasZ);\n    writeStringTextNode(coordinates, coord);\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {import(\"../geom/MultiPoint.js\").default} geometry MultiPoint geometry.\n   * @param {Array<*>} objectStack Node stack.\n   */\n  writeMultiPoint(node, geometry, objectStack) {\n    const context = objectStack[objectStack.length - 1];\n    const hasZ = context['hasZ'];\n    const srsName = context['srsName'];\n    if (srsName) {\n      node.setAttribute('srsName', srsName);\n    }\n    const points = geometry.getPoints();\n    pushSerializeAndPop(\n      {node: node, hasZ: hasZ, srsName: srsName},\n      this.POINTMEMBER_SERIALIZERS,\n      makeSimpleNodeFactory('pointMember'),\n      points,\n      objectStack,\n      undefined,\n      this\n    );\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {import(\"../geom/Point.js\").default} point Point geometry.\n   * @param {Array<*>} objectStack Node stack.\n   */\n  writePointMember(node, point, objectStack) {\n    const child = createElementNS(node.namespaceURI, 'Point');\n    node.appendChild(child);\n    this.writePoint(child, point, objectStack);\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {import(\"../geom/LinearRing.js\").default} geometry LinearRing geometry.\n   * @param {Array<*>} objectStack Node stack.\n   */\n  writeLinearRing(node, geometry, objectStack) {\n    const context = objectStack[objectStack.length - 1];\n    const srsName = context['srsName'];\n    if (srsName) {\n      node.setAttribute('srsName', srsName);\n    }\n    const coordinates = this.createCoordinatesNode_(node.namespaceURI);\n    node.appendChild(coordinates);\n    this.writeCoordinates_(coordinates, geometry, objectStack);\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {import(\"../geom/MultiPolygon.js\").default} geometry MultiPolygon geometry.\n   * @param {Array<*>} objectStack Node stack.\n   */\n  writeMultiSurfaceOrPolygon(node, geometry, objectStack) {\n    const context = objectStack[objectStack.length - 1];\n    const hasZ = context['hasZ'];\n    const srsName = context['srsName'];\n    const surface = context['surface'];\n    if (srsName) {\n      node.setAttribute('srsName', srsName);\n    }\n    const polygons = geometry.getPolygons();\n    pushSerializeAndPop(\n      {node: node, hasZ: hasZ, srsName: srsName, surface: surface},\n      this.SURFACEORPOLYGONMEMBER_SERIALIZERS,\n      this.MULTIGEOMETRY_MEMBER_NODE_FACTORY_,\n      polygons,\n      objectStack,\n      undefined,\n      this\n    );\n  }\n\n  /**\n   * @param {Node} node Node.\n   * @param {import(\"../geom/Polygon.js\").default} polygon Polygon geometry.\n   * @param {Array<*>} objectStack Node stack.\n   */\n  writeSurfaceOrPolygonMember(node, polygon, objectStack) {\n    const child = this.GEOMETRY_NODE_FACTORY_(polygon, objectStack);\n    if (child) {\n      node.appendChild(child);\n      this.writeSurfaceOrPolygon(child, polygon, objectStack);\n    }\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @param {Array<*>} objectStack Node stack.\n   */\n  writeEnvelope(node, extent, objectStack) {\n    const context = objectStack[objectStack.length - 1];\n    const srsName = context['srsName'];\n    if (srsName) {\n      node.setAttribute('srsName', srsName);\n    }\n    const keys = ['lowerCorner', 'upperCorner'];\n    const values = [extent[0] + ' ' + extent[1], extent[2] + ' ' + extent[3]];\n    pushSerializeAndPop(\n      /** @type {import(\"../xml.js\").NodeStackItem} */\n      ({node: node}),\n      this.ENVELOPE_SERIALIZERS,\n      OBJECT_PROPERTY_NODE_FACTORY,\n      values,\n      objectStack,\n      keys,\n      this\n    );\n  }\n\n  /**\n   * @const\n   * @param {*} value Value.\n   * @param {Array<*>} objectStack Object stack.\n   * @param {string} [nodeName] Node name.\n   * @return {Node|undefined} Node.\n   * @private\n   */\n  MULTIGEOMETRY_MEMBER_NODE_FACTORY_(value, objectStack, nodeName) {\n    const parentNode = objectStack[objectStack.length - 1].node;\n    return createElementNS(\n      'http://www.opengis.net/gml',\n      MULTIGEOMETRY_TO_MEMBER_NODENAME[parentNode.nodeName]\n    );\n  }\n}\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\nGML2.prototype.GEOMETRY_FLAT_COORDINATES_PARSERS = {\n  'http://www.opengis.net/gml': {\n    'coordinates': makeReplacer(GML2.prototype.readFlatCoordinates),\n  },\n};\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\nGML2.prototype.FLAT_LINEAR_RINGS_PARSERS = {\n  'http://www.opengis.net/gml': {\n    'innerBoundaryIs': GML2.prototype.innerBoundaryIsParser,\n    'outerBoundaryIs': GML2.prototype.outerBoundaryIsParser,\n  },\n};\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\nGML2.prototype.BOX_PARSERS_ = {\n  'http://www.opengis.net/gml': {\n    'coordinates': makeArrayPusher(GML2.prototype.readFlatCoordinates),\n  },\n};\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\nGML2.prototype.GEOMETRY_PARSERS = {\n  'http://www.opengis.net/gml': {\n    'Point': makeReplacer(GMLBase.prototype.readPoint),\n    'MultiPoint': makeReplacer(GMLBase.prototype.readMultiPoint),\n    'LineString': makeReplacer(GMLBase.prototype.readLineString),\n    'MultiLineString': makeReplacer(GMLBase.prototype.readMultiLineString),\n    'LinearRing': makeReplacer(GMLBase.prototype.readLinearRing),\n    'Polygon': makeReplacer(GMLBase.prototype.readPolygon),\n    'MultiPolygon': makeReplacer(GMLBase.prototype.readMultiPolygon),\n    'Box': makeReplacer(GML2.prototype.readBox),\n  },\n};\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Serializer>>}\n */\nGML2.prototype.GEOMETRY_SERIALIZERS = {\n  'http://www.opengis.net/gml': {\n    'Curve': makeChildAppender(GML2.prototype.writeCurveOrLineString),\n    'MultiCurve': makeChildAppender(GML2.prototype.writeMultiCurveOrLineString),\n    'Point': makeChildAppender(GML2.prototype.writePoint),\n    'MultiPoint': makeChildAppender(GML2.prototype.writeMultiPoint),\n    'LineString': makeChildAppender(GML2.prototype.writeCurveOrLineString),\n    'MultiLineString': makeChildAppender(\n      GML2.prototype.writeMultiCurveOrLineString\n    ),\n    'LinearRing': makeChildAppender(GML2.prototype.writeLinearRing),\n    'Polygon': makeChildAppender(GML2.prototype.writeSurfaceOrPolygon),\n    'MultiPolygon': makeChildAppender(\n      GML2.prototype.writeMultiSurfaceOrPolygon\n    ),\n    'Surface': makeChildAppender(GML2.prototype.writeSurfaceOrPolygon),\n    'MultiSurface': makeChildAppender(\n      GML2.prototype.writeMultiSurfaceOrPolygon\n    ),\n    'Envelope': makeChildAppender(GML2.prototype.writeEnvelope),\n  },\n};\n\n/**\n * @type {Object<string, Object<string, import(\"../xml.js\").Serializer>>}\n */\nGML2.prototype.LINESTRINGORCURVEMEMBER_SERIALIZERS = {\n  'http://www.opengis.net/gml': {\n    'lineStringMember': makeChildAppender(\n      GML2.prototype.writeLineStringOrCurveMember\n    ),\n    'curveMember': makeChildAppender(\n      GML2.prototype.writeLineStringOrCurveMember\n    ),\n  },\n};\n\n/**\n * @type {Object<string, Object<string, import(\"../xml.js\").Serializer>>}\n */\nGML2.prototype.RING_SERIALIZERS = {\n  'http://www.opengis.net/gml': {\n    'outerBoundaryIs': makeChildAppender(GML2.prototype.writeRing),\n    'innerBoundaryIs': makeChildAppender(GML2.prototype.writeRing),\n  },\n};\n\n/**\n * @type {Object<string, Object<string, import(\"../xml.js\").Serializer>>}\n */\nGML2.prototype.POINTMEMBER_SERIALIZERS = {\n  'http://www.opengis.net/gml': {\n    'pointMember': makeChildAppender(GML2.prototype.writePointMember),\n  },\n};\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Serializer>>}\n */\nGML2.prototype.SURFACEORPOLYGONMEMBER_SERIALIZERS = {\n  'http://www.opengis.net/gml': {\n    'surfaceMember': makeChildAppender(\n      GML2.prototype.writeSurfaceOrPolygonMember\n    ),\n    'polygonMember': makeChildAppender(\n      GML2.prototype.writeSurfaceOrPolygonMember\n    ),\n  },\n};\n\n/**\n * @type {Object<string, Object<string, import(\"../xml.js\").Serializer>>}\n */\nGML2.prototype.ENVELOPE_SERIALIZERS = {\n  'http://www.opengis.net/gml': {\n    'lowerCorner': makeChildAppender(writeStringTextNode),\n    'upperCorner': makeChildAppender(writeStringTextNode),\n  },\n};\n\nexport default GML2;\n","/**\n * @module ol/format/GML3\n */\nimport GML2 from './GML2.js';\nimport GMLBase, {GMLNS} from './GMLBase.js';\nimport LineString from '../geom/LineString.js';\nimport MultiLineString from '../geom/MultiLineString.js';\nimport MultiPolygon from '../geom/MultiPolygon.js';\nimport Polygon from '../geom/Polygon.js';\nimport {\n  OBJECT_PROPERTY_NODE_FACTORY,\n  XML_SCHEMA_INSTANCE_URI,\n  createElementNS,\n  getAllTextContent,\n  makeArrayExtender,\n  makeArrayPusher,\n  makeChildAppender,\n  makeReplacer,\n  makeSimpleNodeFactory,\n  parseNode,\n  pushParseAndPop,\n  pushSerializeAndPop,\n} from '../xml.js';\nimport {createOrUpdate} from '../extent.js';\nimport {extend} from '../array.js';\nimport {get as getProjection} from '../proj.js';\nimport {readNonNegativeIntegerString, writeStringTextNode} from './xsd.js';\nimport {\n  transformExtentWithOptions,\n  transformGeometryWithOptions,\n} from './Feature.js';\n\n/**\n * @const\n * @type {string}\n * @private\n */\nconst schemaLocation =\n  GMLNS +\n  ' http://schemas.opengis.net/gml/3.1.1/profiles/gmlsfProfile/' +\n  '1.0.0/gmlsf.xsd';\n\n/**\n * @const\n * @type {Object<string, string>}\n */\nconst MULTIGEOMETRY_TO_MEMBER_NODENAME = {\n  'MultiLineString': 'lineStringMember',\n  'MultiCurve': 'curveMember',\n  'MultiPolygon': 'polygonMember',\n  'MultiSurface': 'surfaceMember',\n};\n\n/**\n * @classdesc\n * Feature format for reading and writing data in the GML format\n * version 3.1.1.\n * Currently only supports GML 3.1.1 Simple Features profile.\n *\n * @api\n */\nclass GML3 extends GMLBase {\n  /**\n   * @param {import(\"./GMLBase.js\").Options} [options] Optional configuration object.\n   */\n  constructor(options) {\n    options = options ? options : {};\n\n    super(options);\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.surface_ = options.surface !== undefined ? options.surface : false;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.curve_ = options.curve !== undefined ? options.curve : false;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.multiCurve_ =\n      options.multiCurve !== undefined ? options.multiCurve : true;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.multiSurface_ =\n      options.multiSurface !== undefined ? options.multiSurface : true;\n\n    /**\n     * @type {string}\n     */\n    this.schemaLocation = options.schemaLocation\n      ? options.schemaLocation\n      : schemaLocation;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.hasZ = options.hasZ !== undefined ? options.hasZ : false;\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {Array<*>} objectStack Object stack.\n   * @return {MultiLineString|undefined} MultiLineString.\n   */\n  readMultiCurve(node, objectStack) {\n    /** @type {Array<LineString>} */\n    const lineStrings = pushParseAndPop(\n      [],\n      this.MULTICURVE_PARSERS,\n      node,\n      objectStack,\n      this\n    );\n    if (lineStrings) {\n      const multiLineString = new MultiLineString(lineStrings);\n      return multiLineString;\n    }\n    return undefined;\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {Array<*>} objectStack Object stack.\n   * @return {Array<number>|undefined} Polygon.\n   */\n  readFlatCurveRing(node, objectStack) {\n    /** @type {Array<LineString>} */\n    const lineStrings = pushParseAndPop(\n      [],\n      this.MULTICURVE_PARSERS,\n      node,\n      objectStack,\n      this\n    );\n    const flatCoordinates = [];\n    for (let i = 0, ii = lineStrings.length; i < ii; ++i) {\n      extend(flatCoordinates, lineStrings[i].getFlatCoordinates());\n    }\n    return flatCoordinates;\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {Array<*>} objectStack Object stack.\n   * @return {MultiPolygon|undefined} MultiPolygon.\n   */\n  readMultiSurface(node, objectStack) {\n    /** @type {Array<Polygon>} */\n    const polygons = pushParseAndPop(\n      [],\n      this.MULTISURFACE_PARSERS,\n      node,\n      objectStack,\n      this\n    );\n    if (polygons) {\n      return new MultiPolygon(polygons);\n    }\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {Array<*>} objectStack Object stack.\n   */\n  curveMemberParser(node, objectStack) {\n    parseNode(this.CURVEMEMBER_PARSERS, node, objectStack, this);\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {Array<*>} objectStack Object stack.\n   */\n  surfaceMemberParser(node, objectStack) {\n    parseNode(this.SURFACEMEMBER_PARSERS, node, objectStack, this);\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {Array<*>} objectStack Object stack.\n   * @return {Array<(Array<number>)>|undefined} flat coordinates.\n   */\n  readPatch(node, objectStack) {\n    return pushParseAndPop(\n      [null],\n      this.PATCHES_PARSERS,\n      node,\n      objectStack,\n      this\n    );\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {Array<*>} objectStack Object stack.\n   * @return {Array<number>|undefined} flat coordinates.\n   */\n  readSegment(node, objectStack) {\n    return pushParseAndPop([], this.SEGMENTS_PARSERS, node, objectStack, this);\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {Array<*>} objectStack Object stack.\n   * @return {Array<(Array<number>)>|undefined} flat coordinates.\n   */\n  readPolygonPatch(node, objectStack) {\n    return pushParseAndPop(\n      [null],\n      this.FLAT_LINEAR_RINGS_PARSERS,\n      node,\n      objectStack,\n      this\n    );\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {Array<*>} objectStack Object stack.\n   * @return {Array<number>|undefined} flat coordinates.\n   */\n  readLineStringSegment(node, objectStack) {\n    return pushParseAndPop(\n      [null],\n      this.GEOMETRY_FLAT_COORDINATES_PARSERS,\n      node,\n      objectStack,\n      this\n    );\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {Array<*>} objectStack Object stack.\n   */\n  interiorParser(node, objectStack) {\n    /** @type {Array<number>|undefined} */\n    const flatLinearRing = pushParseAndPop(\n      undefined,\n      this.RING_PARSERS,\n      node,\n      objectStack,\n      this\n    );\n    if (flatLinearRing) {\n      const flatLinearRings =\n        /** @type {Array<Array<number>>} */\n        (objectStack[objectStack.length - 1]);\n      flatLinearRings.push(flatLinearRing);\n    }\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {Array<*>} objectStack Object stack.\n   */\n  exteriorParser(node, objectStack) {\n    /** @type {Array<number>|undefined} */\n    const flatLinearRing = pushParseAndPop(\n      undefined,\n      this.RING_PARSERS,\n      node,\n      objectStack,\n      this\n    );\n    if (flatLinearRing) {\n      const flatLinearRings =\n        /** @type {Array<Array<number>>} */\n        (objectStack[objectStack.length - 1]);\n      flatLinearRings[0] = flatLinearRing;\n    }\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {Array<*>} objectStack Object stack.\n   * @return {Polygon|undefined} Polygon.\n   */\n  readSurface(node, objectStack) {\n    /** @type {Array<Array<number>>} */\n    const flatLinearRings = pushParseAndPop(\n      [null],\n      this.SURFACE_PARSERS,\n      node,\n      objectStack,\n      this\n    );\n    if (flatLinearRings && flatLinearRings[0]) {\n      const flatCoordinates = flatLinearRings[0];\n      const ends = [flatCoordinates.length];\n      let i, ii;\n      for (i = 1, ii = flatLinearRings.length; i < ii; ++i) {\n        extend(flatCoordinates, flatLinearRings[i]);\n        ends.push(flatCoordinates.length);\n      }\n      return new Polygon(flatCoordinates, 'XYZ', ends);\n    }\n    return undefined;\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {Array<*>} objectStack Object stack.\n   * @return {LineString|undefined} LineString.\n   */\n  readCurve(node, objectStack) {\n    /** @type {Array<number>} */\n    const flatCoordinates = pushParseAndPop(\n      [null],\n      this.CURVE_PARSERS,\n      node,\n      objectStack,\n      this\n    );\n    if (flatCoordinates) {\n      const lineString = new LineString(flatCoordinates, 'XYZ');\n      return lineString;\n    }\n    return undefined;\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {Array<*>} objectStack Object stack.\n   * @return {import(\"../extent.js\").Extent|undefined} Envelope.\n   */\n  readEnvelope(node, objectStack) {\n    /** @type {Array<number>} */\n    const flatCoordinates = pushParseAndPop(\n      [null],\n      this.ENVELOPE_PARSERS,\n      node,\n      objectStack,\n      this\n    );\n    return createOrUpdate(\n      flatCoordinates[1][0],\n      flatCoordinates[1][1],\n      flatCoordinates[2][0],\n      flatCoordinates[2][1]\n    );\n  }\n\n  /**\n   * @param {Node} node Node.\n   * @param {Array<*>} objectStack Object stack.\n   * @return {Array<number>|undefined} Flat coordinates.\n   */\n  readFlatPos(node, objectStack) {\n    let s = getAllTextContent(node, false);\n    const re = /^\\s*([+\\-]?\\d*\\.?\\d+(?:[eE][+\\-]?\\d+)?)\\s*/;\n    /** @type {Array<number>} */\n    const flatCoordinates = [];\n    let m;\n    while ((m = re.exec(s))) {\n      flatCoordinates.push(parseFloat(m[1]));\n      s = s.substr(m[0].length);\n    }\n    if (s !== '') {\n      return undefined;\n    }\n    const context = objectStack[0];\n    const containerSrs = context['srsName'];\n    let axisOrientation = 'enu';\n    if (containerSrs) {\n      const proj = getProjection(containerSrs);\n      axisOrientation = proj.getAxisOrientation();\n    }\n    if (axisOrientation === 'neu') {\n      let i, ii;\n      for (i = 0, ii = flatCoordinates.length; i < ii; i += 3) {\n        const y = flatCoordinates[i];\n        const x = flatCoordinates[i + 1];\n        flatCoordinates[i] = x;\n        flatCoordinates[i + 1] = y;\n      }\n    }\n    const len = flatCoordinates.length;\n    if (len == 2) {\n      flatCoordinates.push(0);\n    }\n    if (len === 0) {\n      return undefined;\n    }\n    return flatCoordinates;\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {Array<*>} objectStack Object stack.\n   * @return {Array<number>|undefined} Flat coordinates.\n   */\n  readFlatPosList(node, objectStack) {\n    const s = getAllTextContent(node, false).replace(/^\\s*|\\s*$/g, '');\n    const context = objectStack[0];\n    const containerSrs = context['srsName'];\n    const contextDimension = context['srsDimension'];\n    let axisOrientation = 'enu';\n    if (containerSrs) {\n      const proj = getProjection(containerSrs);\n      axisOrientation = proj.getAxisOrientation();\n    }\n    const coords = s.split(/\\s+/);\n    // The \"dimension\" attribute is from the GML 3.0.1 spec.\n    let dim = 2;\n    if (node.getAttribute('srsDimension')) {\n      dim = readNonNegativeIntegerString(node.getAttribute('srsDimension'));\n    } else if (node.getAttribute('dimension')) {\n      dim = readNonNegativeIntegerString(node.getAttribute('dimension'));\n    } else if (\n      /** @type {Element} */ (node.parentNode).getAttribute('srsDimension')\n    ) {\n      dim = readNonNegativeIntegerString(\n        /** @type {Element} */ (node.parentNode).getAttribute('srsDimension')\n      );\n    } else if (contextDimension) {\n      dim = readNonNegativeIntegerString(contextDimension);\n    }\n    let x, y, z;\n    const flatCoordinates = [];\n    for (let i = 0, ii = coords.length; i < ii; i += dim) {\n      x = parseFloat(coords[i]);\n      y = parseFloat(coords[i + 1]);\n      z = dim === 3 ? parseFloat(coords[i + 2]) : 0;\n      if (axisOrientation.substr(0, 2) === 'en') {\n        flatCoordinates.push(x, y, z);\n      } else {\n        flatCoordinates.push(y, x, z);\n      }\n    }\n    return flatCoordinates;\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {import(\"../geom/Point.js\").default} value Point geometry.\n   * @param {Array<*>} objectStack Node stack.\n   * @private\n   */\n  writePos_(node, value, objectStack) {\n    const context = objectStack[objectStack.length - 1];\n    const hasZ = context['hasZ'];\n    const srsDimension = hasZ ? '3' : '2';\n    node.setAttribute('srsDimension', srsDimension);\n    const srsName = context['srsName'];\n    let axisOrientation = 'enu';\n    if (srsName) {\n      axisOrientation = getProjection(srsName).getAxisOrientation();\n    }\n    const point = value.getCoordinates();\n    let coords;\n    // only 2d for simple features profile\n    if (axisOrientation.substr(0, 2) === 'en') {\n      coords = point[0] + ' ' + point[1];\n    } else {\n      coords = point[1] + ' ' + point[0];\n    }\n    if (hasZ) {\n      // For newly created points, Z can be undefined.\n      const z = point[2] || 0;\n      coords += ' ' + z;\n    }\n    writeStringTextNode(node, coords);\n  }\n\n  /**\n   * @param {Array<number>} point Point geometry.\n   * @param {string} [srsName] Optional srsName\n   * @param {boolean} [hasZ] whether the geometry has a Z coordinate (is 3D) or not.\n   * @return {string} The coords string.\n   * @private\n   */\n  getCoords_(point, srsName, hasZ) {\n    let axisOrientation = 'enu';\n    if (srsName) {\n      axisOrientation = getProjection(srsName).getAxisOrientation();\n    }\n    let coords =\n      axisOrientation.substr(0, 2) === 'en'\n        ? point[0] + ' ' + point[1]\n        : point[1] + ' ' + point[0];\n    if (hasZ) {\n      // For newly created points, Z can be undefined.\n      const z = point[2] || 0;\n      coords += ' ' + z;\n    }\n\n    return coords;\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {LineString|import(\"../geom/LinearRing.js\").default} value Geometry.\n   * @param {Array<*>} objectStack Node stack.\n   * @private\n   */\n  writePosList_(node, value, objectStack) {\n    const context = objectStack[objectStack.length - 1];\n    const hasZ = context['hasZ'];\n    const srsDimension = hasZ ? '3' : '2';\n    node.setAttribute('srsDimension', srsDimension);\n    const srsName = context['srsName'];\n    // only 2d for simple features profile\n    const points = value.getCoordinates();\n    const len = points.length;\n    const parts = new Array(len);\n    let point;\n    for (let i = 0; i < len; ++i) {\n      point = points[i];\n      parts[i] = this.getCoords_(point, srsName, hasZ);\n    }\n    writeStringTextNode(node, parts.join(' '));\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {import(\"../geom/Point.js\").default} geometry Point geometry.\n   * @param {Array<*>} objectStack Node stack.\n   */\n  writePoint(node, geometry, objectStack) {\n    const context = objectStack[objectStack.length - 1];\n    const srsName = context['srsName'];\n    if (srsName) {\n      node.setAttribute('srsName', srsName);\n    }\n    const pos = createElementNS(node.namespaceURI, 'pos');\n    node.appendChild(pos);\n    this.writePos_(pos, geometry, objectStack);\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @param {Array<*>} objectStack Node stack.\n   */\n  writeEnvelope(node, extent, objectStack) {\n    const context = objectStack[objectStack.length - 1];\n    const srsName = context['srsName'];\n    if (srsName) {\n      node.setAttribute('srsName', srsName);\n    }\n    const keys = ['lowerCorner', 'upperCorner'];\n    const values = [extent[0] + ' ' + extent[1], extent[2] + ' ' + extent[3]];\n    pushSerializeAndPop(\n      /** @type {import(\"../xml.js\").NodeStackItem} */\n      ({node: node}),\n      this.ENVELOPE_SERIALIZERS,\n      OBJECT_PROPERTY_NODE_FACTORY,\n      values,\n      objectStack,\n      keys,\n      this\n    );\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {import(\"../geom/LinearRing.js\").default} geometry LinearRing geometry.\n   * @param {Array<*>} objectStack Node stack.\n   */\n  writeLinearRing(node, geometry, objectStack) {\n    const context = objectStack[objectStack.length - 1];\n    const srsName = context['srsName'];\n    if (srsName) {\n      node.setAttribute('srsName', srsName);\n    }\n    const posList = createElementNS(node.namespaceURI, 'posList');\n    node.appendChild(posList);\n    this.writePosList_(posList, geometry, objectStack);\n  }\n\n  /**\n   * @param {*} value Value.\n   * @param {Array<*>} objectStack Object stack.\n   * @param {string} [nodeName] Node name.\n   * @return {Node} Node.\n   * @private\n   */\n  RING_NODE_FACTORY_(value, objectStack, nodeName) {\n    const context = objectStack[objectStack.length - 1];\n    const parentNode = context.node;\n    const exteriorWritten = context['exteriorWritten'];\n    if (exteriorWritten === undefined) {\n      context['exteriorWritten'] = true;\n    }\n    return createElementNS(\n      parentNode.namespaceURI,\n      exteriorWritten !== undefined ? 'interior' : 'exterior'\n    );\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {Polygon} geometry Polygon geometry.\n   * @param {Array<*>} objectStack Node stack.\n   */\n  writeSurfaceOrPolygon(node, geometry, objectStack) {\n    const context = objectStack[objectStack.length - 1];\n    const hasZ = context['hasZ'];\n    const srsName = context['srsName'];\n    if (node.nodeName !== 'PolygonPatch' && srsName) {\n      node.setAttribute('srsName', srsName);\n    }\n    if (node.nodeName === 'Polygon' || node.nodeName === 'PolygonPatch') {\n      const rings = geometry.getLinearRings();\n      pushSerializeAndPop(\n        {node: node, hasZ: hasZ, srsName: srsName},\n        this.RING_SERIALIZERS,\n        this.RING_NODE_FACTORY_,\n        rings,\n        objectStack,\n        undefined,\n        this\n      );\n    } else if (node.nodeName === 'Surface') {\n      const patches = createElementNS(node.namespaceURI, 'patches');\n      node.appendChild(patches);\n      this.writeSurfacePatches_(patches, geometry, objectStack);\n    }\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {LineString} geometry LineString geometry.\n   * @param {Array<*>} objectStack Node stack.\n   */\n  writeCurveOrLineString(node, geometry, objectStack) {\n    const context = objectStack[objectStack.length - 1];\n    const srsName = context['srsName'];\n    if (node.nodeName !== 'LineStringSegment' && srsName) {\n      node.setAttribute('srsName', srsName);\n    }\n    if (\n      node.nodeName === 'LineString' ||\n      node.nodeName === 'LineStringSegment'\n    ) {\n      const posList = createElementNS(node.namespaceURI, 'posList');\n      node.appendChild(posList);\n      this.writePosList_(posList, geometry, objectStack);\n    } else if (node.nodeName === 'Curve') {\n      const segments = createElementNS(node.namespaceURI, 'segments');\n      node.appendChild(segments);\n      this.writeCurveSegments_(segments, geometry, objectStack);\n    }\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {MultiPolygon} geometry MultiPolygon geometry.\n   * @param {Array<*>} objectStack Node stack.\n   */\n  writeMultiSurfaceOrPolygon(node, geometry, objectStack) {\n    const context = objectStack[objectStack.length - 1];\n    const hasZ = context['hasZ'];\n    const srsName = context['srsName'];\n    const surface = context['surface'];\n    if (srsName) {\n      node.setAttribute('srsName', srsName);\n    }\n    const polygons = geometry.getPolygons();\n    pushSerializeAndPop(\n      {node: node, hasZ: hasZ, srsName: srsName, surface: surface},\n      this.SURFACEORPOLYGONMEMBER_SERIALIZERS,\n      this.MULTIGEOMETRY_MEMBER_NODE_FACTORY_,\n      polygons,\n      objectStack,\n      undefined,\n      this\n    );\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {import(\"../geom/MultiPoint.js\").default} geometry MultiPoint geometry.\n   * @param {Array<*>} objectStack Node stack.\n   */\n  writeMultiPoint(node, geometry, objectStack) {\n    const context = objectStack[objectStack.length - 1];\n    const srsName = context['srsName'];\n    const hasZ = context['hasZ'];\n    if (srsName) {\n      node.setAttribute('srsName', srsName);\n    }\n    const points = geometry.getPoints();\n    pushSerializeAndPop(\n      {node: node, hasZ: hasZ, srsName: srsName},\n      this.POINTMEMBER_SERIALIZERS,\n      makeSimpleNodeFactory('pointMember'),\n      points,\n      objectStack,\n      undefined,\n      this\n    );\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {MultiLineString} geometry MultiLineString geometry.\n   * @param {Array<*>} objectStack Node stack.\n   */\n  writeMultiCurveOrLineString(node, geometry, objectStack) {\n    const context = objectStack[objectStack.length - 1];\n    const hasZ = context['hasZ'];\n    const srsName = context['srsName'];\n    const curve = context['curve'];\n    if (srsName) {\n      node.setAttribute('srsName', srsName);\n    }\n    const lines = geometry.getLineStrings();\n    pushSerializeAndPop(\n      {node: node, hasZ: hasZ, srsName: srsName, curve: curve},\n      this.LINESTRINGORCURVEMEMBER_SERIALIZERS,\n      this.MULTIGEOMETRY_MEMBER_NODE_FACTORY_,\n      lines,\n      objectStack,\n      undefined,\n      this\n    );\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {import(\"../geom/LinearRing.js\").default} ring LinearRing geometry.\n   * @param {Array<*>} objectStack Node stack.\n   */\n  writeRing(node, ring, objectStack) {\n    const linearRing = createElementNS(node.namespaceURI, 'LinearRing');\n    node.appendChild(linearRing);\n    this.writeLinearRing(linearRing, ring, objectStack);\n  }\n\n  /**\n   * @param {Node} node Node.\n   * @param {Polygon} polygon Polygon geometry.\n   * @param {Array<*>} objectStack Node stack.\n   */\n  writeSurfaceOrPolygonMember(node, polygon, objectStack) {\n    const child = this.GEOMETRY_NODE_FACTORY_(polygon, objectStack);\n    if (child) {\n      node.appendChild(child);\n      this.writeSurfaceOrPolygon(child, polygon, objectStack);\n    }\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {import(\"../geom/Point.js\").default} point Point geometry.\n   * @param {Array<*>} objectStack Node stack.\n   */\n  writePointMember(node, point, objectStack) {\n    const child = createElementNS(node.namespaceURI, 'Point');\n    node.appendChild(child);\n    this.writePoint(child, point, objectStack);\n  }\n\n  /**\n   * @param {Node} node Node.\n   * @param {LineString} line LineString geometry.\n   * @param {Array<*>} objectStack Node stack.\n   */\n  writeLineStringOrCurveMember(node, line, objectStack) {\n    const child = this.GEOMETRY_NODE_FACTORY_(line, objectStack);\n    if (child) {\n      node.appendChild(child);\n      this.writeCurveOrLineString(child, line, objectStack);\n    }\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {Polygon} polygon Polygon geometry.\n   * @param {Array<*>} objectStack Node stack.\n   * @private\n   */\n  writeSurfacePatches_(node, polygon, objectStack) {\n    const child = createElementNS(node.namespaceURI, 'PolygonPatch');\n    node.appendChild(child);\n    this.writeSurfaceOrPolygon(child, polygon, objectStack);\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {LineString} line LineString geometry.\n   * @param {Array<*>} objectStack Node stack.\n   * @private\n   */\n  writeCurveSegments_(node, line, objectStack) {\n    const child = createElementNS(node.namespaceURI, 'LineStringSegment');\n    node.appendChild(child);\n    this.writeCurveOrLineString(child, line, objectStack);\n  }\n\n  /**\n   * @param {Node} node Node.\n   * @param {import(\"../geom/Geometry.js\").default|import(\"../extent.js\").Extent} geometry Geometry.\n   * @param {Array<*>} objectStack Node stack.\n   */\n  writeGeometryElement(node, geometry, objectStack) {\n    const context = /** @type {import(\"./Feature.js\").WriteOptions} */ (\n      objectStack[objectStack.length - 1]\n    );\n    const item = Object.assign({}, context);\n    item['node'] = node;\n    let value;\n    if (Array.isArray(geometry)) {\n      value = transformExtentWithOptions(\n        /** @type {import(\"../extent.js\").Extent} */ (geometry),\n        context\n      );\n    } else {\n      value = transformGeometryWithOptions(\n        /** @type {import(\"../geom/Geometry.js\").default} */ (geometry),\n        true,\n        context\n      );\n    }\n    pushSerializeAndPop(\n      /** @type {import(\"../xml.js\").NodeStackItem} */\n      (item),\n      this.GEOMETRY_SERIALIZERS,\n      this.GEOMETRY_NODE_FACTORY_,\n      [value],\n      objectStack,\n      undefined,\n      this\n    );\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {import(\"../Feature.js\").default} feature Feature.\n   * @param {Array<*>} objectStack Node stack.\n   */\n  writeFeatureElement(node, feature, objectStack) {\n    const fid = feature.getId();\n    if (fid) {\n      node.setAttribute('fid', /** @type {string} */ (fid));\n    }\n    const context = /** @type {Object} */ (objectStack[objectStack.length - 1]);\n    const featureNS = context['featureNS'];\n    const geometryName = feature.getGeometryName();\n    if (!context.serializers) {\n      context.serializers = {};\n      context.serializers[featureNS] = {};\n    }\n    const keys = [];\n    const values = [];\n    if (feature.hasProperties()) {\n      const properties = feature.getProperties();\n      for (const key in properties) {\n        const value = properties[key];\n        if (value !== null) {\n          keys.push(key);\n          values.push(value);\n          if (\n            key == geometryName ||\n            typeof (/** @type {?} */ (value).getSimplifiedGeometry) ===\n              'function'\n          ) {\n            if (!(key in context.serializers[featureNS])) {\n              context.serializers[featureNS][key] = makeChildAppender(\n                this.writeGeometryElement,\n                this\n              );\n            }\n          } else {\n            if (!(key in context.serializers[featureNS])) {\n              context.serializers[featureNS][key] =\n                makeChildAppender(writeStringTextNode);\n            }\n          }\n        }\n      }\n    }\n    const item = Object.assign({}, context);\n    item.node = node;\n    pushSerializeAndPop(\n      /** @type {import(\"../xml.js\").NodeStackItem} */\n      (item),\n      context.serializers,\n      makeSimpleNodeFactory(undefined, featureNS),\n      values,\n      objectStack,\n      keys\n    );\n  }\n\n  /**\n   * @param {Node} node Node.\n   * @param {Array<import(\"../Feature.js\").default>} features Features.\n   * @param {Array<*>} objectStack Node stack.\n   * @private\n   */\n  writeFeatureMembers_(node, features, objectStack) {\n    const context = /** @type {Object} */ (objectStack[objectStack.length - 1]);\n    const featureType = context['featureType'];\n    const featureNS = context['featureNS'];\n    /** @type {Object<string, Object<string, import(\"../xml.js\").Serializer>>} */\n    const serializers = {};\n    serializers[featureNS] = {};\n    serializers[featureNS][featureType] = makeChildAppender(\n      this.writeFeatureElement,\n      this\n    );\n    const item = Object.assign({}, context);\n    item.node = node;\n    pushSerializeAndPop(\n      /** @type {import(\"../xml.js\").NodeStackItem} */\n      (item),\n      serializers,\n      makeSimpleNodeFactory(featureType, featureNS),\n      features,\n      objectStack\n    );\n  }\n\n  /**\n   * @const\n   * @param {*} value Value.\n   * @param {Array<*>} objectStack Object stack.\n   * @param {string} [nodeName] Node name.\n   * @return {Node|undefined} Node.\n   * @private\n   */\n  MULTIGEOMETRY_MEMBER_NODE_FACTORY_(value, objectStack, nodeName) {\n    const parentNode = objectStack[objectStack.length - 1].node;\n    return createElementNS(\n      this.namespace,\n      MULTIGEOMETRY_TO_MEMBER_NODENAME[parentNode.nodeName]\n    );\n  }\n\n  /**\n   * @const\n   * @param {*} value Value.\n   * @param {Array<*>} objectStack Object stack.\n   * @param {string} [nodeName] Node name.\n   * @return {Element|undefined} Node.\n   * @private\n   */\n  GEOMETRY_NODE_FACTORY_(value, objectStack, nodeName) {\n    const context = objectStack[objectStack.length - 1];\n    const multiSurface = context['multiSurface'];\n    const surface = context['surface'];\n    const curve = context['curve'];\n    const multiCurve = context['multiCurve'];\n    if (!Array.isArray(value)) {\n      nodeName = /** @type {import(\"../geom/Geometry.js\").default} */ (\n        value\n      ).getType();\n      if (nodeName === 'MultiPolygon' && multiSurface === true) {\n        nodeName = 'MultiSurface';\n      } else if (nodeName === 'Polygon' && surface === true) {\n        nodeName = 'Surface';\n      } else if (nodeName === 'LineString' && curve === true) {\n        nodeName = 'Curve';\n      } else if (nodeName === 'MultiLineString' && multiCurve === true) {\n        nodeName = 'MultiCurve';\n      }\n    } else {\n      nodeName = 'Envelope';\n    }\n    return createElementNS(this.namespace, nodeName);\n  }\n\n  /**\n   * Encode a geometry in GML 3.1.1 Simple Features.\n   *\n   * @param {import(\"../geom/Geometry.js\").default} geometry Geometry.\n   * @param {import(\"./Feature.js\").WriteOptions} [options] Options.\n   * @return {Node} Node.\n   * @api\n   */\n  writeGeometryNode(geometry, options) {\n    options = this.adaptOptions(options);\n    const geom = createElementNS(this.namespace, 'geom');\n    const context = {\n      node: geom,\n      hasZ: this.hasZ,\n      srsName: this.srsName,\n      curve: this.curve_,\n      surface: this.surface_,\n      multiSurface: this.multiSurface_,\n      multiCurve: this.multiCurve_,\n    };\n    if (options) {\n      Object.assign(context, options);\n    }\n    this.writeGeometryElement(geom, geometry, [context]);\n    return geom;\n  }\n\n  /**\n   * Encode an array of features in the GML 3.1.1 format as an XML node.\n   *\n   * @param {Array<import(\"../Feature.js\").default>} features Features.\n   * @param {import(\"./Feature.js\").WriteOptions} [options] Options.\n   * @return {Element} Node.\n   * @api\n   */\n  writeFeaturesNode(features, options) {\n    options = this.adaptOptions(options);\n    const node = createElementNS(this.namespace, 'featureMembers');\n    node.setAttributeNS(\n      XML_SCHEMA_INSTANCE_URI,\n      'xsi:schemaLocation',\n      this.schemaLocation\n    );\n    const context = {\n      srsName: this.srsName,\n      hasZ: this.hasZ,\n      curve: this.curve_,\n      surface: this.surface_,\n      multiSurface: this.multiSurface_,\n      multiCurve: this.multiCurve_,\n      featureNS: this.featureNS,\n      featureType: this.featureType,\n    };\n    if (options) {\n      Object.assign(context, options);\n    }\n    this.writeFeatureMembers_(node, features, [context]);\n    return node;\n  }\n}\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\nGML3.prototype.GEOMETRY_FLAT_COORDINATES_PARSERS = {\n  'http://www.opengis.net/gml': {\n    'pos': makeReplacer(GML3.prototype.readFlatPos),\n    'posList': makeReplacer(GML3.prototype.readFlatPosList),\n    'coordinates': makeReplacer(GML2.prototype.readFlatCoordinates),\n  },\n};\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\nGML3.prototype.FLAT_LINEAR_RINGS_PARSERS = {\n  'http://www.opengis.net/gml': {\n    'interior': GML3.prototype.interiorParser,\n    'exterior': GML3.prototype.exteriorParser,\n  },\n};\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\nGML3.prototype.GEOMETRY_PARSERS = {\n  'http://www.opengis.net/gml': {\n    'Point': makeReplacer(GMLBase.prototype.readPoint),\n    'MultiPoint': makeReplacer(GMLBase.prototype.readMultiPoint),\n    'LineString': makeReplacer(GMLBase.prototype.readLineString),\n    'MultiLineString': makeReplacer(GMLBase.prototype.readMultiLineString),\n    'LinearRing': makeReplacer(GMLBase.prototype.readLinearRing),\n    'Polygon': makeReplacer(GMLBase.prototype.readPolygon),\n    'MultiPolygon': makeReplacer(GMLBase.prototype.readMultiPolygon),\n    'Surface': makeReplacer(GML3.prototype.readSurface),\n    'MultiSurface': makeReplacer(GML3.prototype.readMultiSurface),\n    'Curve': makeReplacer(GML3.prototype.readCurve),\n    'MultiCurve': makeReplacer(GML3.prototype.readMultiCurve),\n    'Envelope': makeReplacer(GML3.prototype.readEnvelope),\n  },\n};\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\nGML3.prototype.MULTICURVE_PARSERS = {\n  'http://www.opengis.net/gml': {\n    'curveMember': makeArrayPusher(GML3.prototype.curveMemberParser),\n    'curveMembers': makeArrayPusher(GML3.prototype.curveMemberParser),\n  },\n};\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\nGML3.prototype.MULTISURFACE_PARSERS = {\n  'http://www.opengis.net/gml': {\n    'surfaceMember': makeArrayPusher(GML3.prototype.surfaceMemberParser),\n    'surfaceMembers': makeArrayPusher(GML3.prototype.surfaceMemberParser),\n  },\n};\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\nGML3.prototype.CURVEMEMBER_PARSERS = {\n  'http://www.opengis.net/gml': {\n    'LineString': makeArrayPusher(GMLBase.prototype.readLineString),\n    'Curve': makeArrayPusher(GML3.prototype.readCurve),\n  },\n};\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\nGML3.prototype.SURFACEMEMBER_PARSERS = {\n  'http://www.opengis.net/gml': {\n    'Polygon': makeArrayPusher(GMLBase.prototype.readPolygon),\n    'Surface': makeArrayPusher(GML3.prototype.readSurface),\n  },\n};\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\nGML3.prototype.SURFACE_PARSERS = {\n  'http://www.opengis.net/gml': {\n    'patches': makeReplacer(GML3.prototype.readPatch),\n  },\n};\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\nGML3.prototype.CURVE_PARSERS = {\n  'http://www.opengis.net/gml': {\n    'segments': makeReplacer(GML3.prototype.readSegment),\n  },\n};\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\nGML3.prototype.ENVELOPE_PARSERS = {\n  'http://www.opengis.net/gml': {\n    'lowerCorner': makeArrayPusher(GML3.prototype.readFlatPosList),\n    'upperCorner': makeArrayPusher(GML3.prototype.readFlatPosList),\n  },\n};\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\nGML3.prototype.PATCHES_PARSERS = {\n  'http://www.opengis.net/gml': {\n    'PolygonPatch': makeReplacer(GML3.prototype.readPolygonPatch),\n  },\n};\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\nGML3.prototype.SEGMENTS_PARSERS = {\n  'http://www.opengis.net/gml': {\n    'LineStringSegment': makeArrayExtender(\n      GML3.prototype.readLineStringSegment\n    ),\n  },\n};\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\nGMLBase.prototype.RING_PARSERS = {\n  'http://www.opengis.net/gml': {\n    'LinearRing': makeReplacer(GMLBase.prototype.readFlatLinearRing),\n    'Ring': makeReplacer(GML3.prototype.readFlatCurveRing),\n  },\n};\n\n/**\n * Encode an array of features in GML 3.1.1 Simple Features.\n *\n * @function\n * @param {Array<import(\"../Feature.js\").default>} features Features.\n * @param {import(\"./Feature.js\").WriteOptions} [options] Options.\n * @return {string} Result.\n * @api\n */\nGML3.prototype.writeFeatures;\n\n/**\n * @type {Object<string, Object<string, import(\"../xml.js\").Serializer>>}\n */\nGML3.prototype.RING_SERIALIZERS = {\n  'http://www.opengis.net/gml': {\n    'exterior': makeChildAppender(GML3.prototype.writeRing),\n    'interior': makeChildAppender(GML3.prototype.writeRing),\n  },\n};\n\n/**\n * @type {Object<string, Object<string, import(\"../xml.js\").Serializer>>}\n */\nGML3.prototype.ENVELOPE_SERIALIZERS = {\n  'http://www.opengis.net/gml': {\n    'lowerCorner': makeChildAppender(writeStringTextNode),\n    'upperCorner': makeChildAppender(writeStringTextNode),\n  },\n};\n\n/**\n * @type {Object<string, Object<string, import(\"../xml.js\").Serializer>>}\n */\nGML3.prototype.SURFACEORPOLYGONMEMBER_SERIALIZERS = {\n  'http://www.opengis.net/gml': {\n    'surfaceMember': makeChildAppender(\n      GML3.prototype.writeSurfaceOrPolygonMember\n    ),\n    'polygonMember': makeChildAppender(\n      GML3.prototype.writeSurfaceOrPolygonMember\n    ),\n  },\n};\n\n/**\n * @type {Object<string, Object<string, import(\"../xml.js\").Serializer>>}\n */\nGML3.prototype.POINTMEMBER_SERIALIZERS = {\n  'http://www.opengis.net/gml': {\n    'pointMember': makeChildAppender(GML3.prototype.writePointMember),\n  },\n};\n\n/**\n * @type {Object<string, Object<string, import(\"../xml.js\").Serializer>>}\n */\nGML3.prototype.LINESTRINGORCURVEMEMBER_SERIALIZERS = {\n  'http://www.opengis.net/gml': {\n    'lineStringMember': makeChildAppender(\n      GML3.prototype.writeLineStringOrCurveMember\n    ),\n    'curveMember': makeChildAppender(\n      GML3.prototype.writeLineStringOrCurveMember\n    ),\n  },\n};\n\n/**\n * @type {Object<string, Object<string, import(\"../xml.js\").Serializer>>}\n */\nGML3.prototype.GEOMETRY_SERIALIZERS = {\n  'http://www.opengis.net/gml': {\n    'Curve': makeChildAppender(GML3.prototype.writeCurveOrLineString),\n    'MultiCurve': makeChildAppender(GML3.prototype.writeMultiCurveOrLineString),\n    'Point': makeChildAppender(GML3.prototype.writePoint),\n    'MultiPoint': makeChildAppender(GML3.prototype.writeMultiPoint),\n    'LineString': makeChildAppender(GML3.prototype.writeCurveOrLineString),\n    'MultiLineString': makeChildAppender(\n      GML3.prototype.writeMultiCurveOrLineString\n    ),\n    'LinearRing': makeChildAppender(GML3.prototype.writeLinearRing),\n    'Polygon': makeChildAppender(GML3.prototype.writeSurfaceOrPolygon),\n    'MultiPolygon': makeChildAppender(\n      GML3.prototype.writeMultiSurfaceOrPolygon\n    ),\n    'Surface': makeChildAppender(GML3.prototype.writeSurfaceOrPolygon),\n    'MultiSurface': makeChildAppender(\n      GML3.prototype.writeMultiSurfaceOrPolygon\n    ),\n    'Envelope': makeChildAppender(GML3.prototype.writeEnvelope),\n  },\n};\n\nexport default GML3;\n","/**\n * @module ol/format/GML\n */\nimport GML3 from './GML3.js';\n\n/**\n * Feature format for reading and writing data in the GML format\n * version 3.1.1.\n * Currently only supports GML 3.1.1 Simple Features profile.\n *\n * @class\n * @param {import(\"./GMLBase.js\").Options} [options]\n *     Optional configuration object.\n * @api\n */\nconst GML = GML3;\n\n/**\n * Encode an array of features in GML 3.1.1 Simple Features.\n *\n * @function\n * @param {Array<import(\"../Feature.js\").default>} features Features.\n * @param {import(\"./Feature.js\").WriteOptions} [options] Options.\n * @return {string} Result.\n * @api\n */\nGML.prototype.writeFeatures;\n\n/**\n * Encode an array of features in the GML 3.1.1 format as an XML node.\n *\n * @function\n * @param {Array<import(\"../Feature.js\").default>} features Features.\n * @param {import(\"./Feature.js\").WriteOptions} [options] Options.\n * @return {Node} Node.\n * @api\n */\nGML.prototype.writeFeaturesNode;\n\nexport default GML;\n","/**\n * @module ol/format/GML32\n */\nimport GML2 from './GML2.js';\nimport GML3 from './GML3.js';\nimport GMLBase from './GMLBase.js';\nimport {\n  makeArrayExtender,\n  makeArrayPusher,\n  makeChildAppender,\n  makeReplacer,\n} from '../xml.js';\nimport {writeStringTextNode} from '../format/xsd.js';\n\n/**\n * @classdesc Feature format for reading and writing data in the GML format\n *            version 3.2.1.\n * @api\n */\nclass GML32 extends GML3 {\n  /**\n   * @param {import(\"./GMLBase.js\").Options} [options] Optional configuration object.\n   */\n  constructor(options) {\n    options = options ? options : {};\n\n    super(options);\n\n    /**\n     * @type {string}\n     */\n    this.schemaLocation = options.schemaLocation\n      ? options.schemaLocation\n      : this.namespace + ' http://schemas.opengis.net/gml/3.2.1/gml.xsd';\n  }\n\n  /**\n   * @param {Node} node Node.\n   * @param {import(\"../geom/Geometry.js\").default|import(\"../extent.js\").Extent} geometry Geometry.\n   * @param {Array<*>} objectStack Node stack.\n   */\n  writeGeometryElement(node, geometry, objectStack) {\n    const context = objectStack[objectStack.length - 1];\n    objectStack[objectStack.length - 1] = Object.assign(\n      {multiCurve: true, multiSurface: true},\n      context\n    );\n    super.writeGeometryElement(node, geometry, objectStack);\n  }\n}\n\nGML32.prototype.namespace = 'http://www.opengis.net/gml/3.2';\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\nGML32.prototype.GEOMETRY_FLAT_COORDINATES_PARSERS = {\n  'http://www.opengis.net/gml/3.2': {\n    'pos': makeReplacer(GML3.prototype.readFlatPos),\n    'posList': makeReplacer(GML3.prototype.readFlatPosList),\n    'coordinates': makeReplacer(GML2.prototype.readFlatCoordinates),\n  },\n};\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\nGML32.prototype.FLAT_LINEAR_RINGS_PARSERS = {\n  'http://www.opengis.net/gml/3.2': {\n    'interior': GML3.prototype.interiorParser,\n    'exterior': GML3.prototype.exteriorParser,\n  },\n};\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\nGML32.prototype.GEOMETRY_PARSERS = {\n  'http://www.opengis.net/gml/3.2': {\n    'Point': makeReplacer(GMLBase.prototype.readPoint),\n    'MultiPoint': makeReplacer(GMLBase.prototype.readMultiPoint),\n    'LineString': makeReplacer(GMLBase.prototype.readLineString),\n    'MultiLineString': makeReplacer(GMLBase.prototype.readMultiLineString),\n    'LinearRing': makeReplacer(GMLBase.prototype.readLinearRing),\n    'Polygon': makeReplacer(GMLBase.prototype.readPolygon),\n    'MultiPolygon': makeReplacer(GMLBase.prototype.readMultiPolygon),\n    'Surface': makeReplacer(GML32.prototype.readSurface),\n    'MultiSurface': makeReplacer(GML3.prototype.readMultiSurface),\n    'Curve': makeReplacer(GML32.prototype.readCurve),\n    'MultiCurve': makeReplacer(GML3.prototype.readMultiCurve),\n    'Envelope': makeReplacer(GML32.prototype.readEnvelope),\n  },\n};\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\nGML32.prototype.MULTICURVE_PARSERS = {\n  'http://www.opengis.net/gml/3.2': {\n    'curveMember': makeArrayPusher(GML3.prototype.curveMemberParser),\n    'curveMembers': makeArrayPusher(GML3.prototype.curveMemberParser),\n  },\n};\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\nGML32.prototype.MULTISURFACE_PARSERS = {\n  'http://www.opengis.net/gml/3.2': {\n    'surfaceMember': makeArrayPusher(GML3.prototype.surfaceMemberParser),\n    'surfaceMembers': makeArrayPusher(GML3.prototype.surfaceMemberParser),\n  },\n};\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\nGML32.prototype.CURVEMEMBER_PARSERS = {\n  'http://www.opengis.net/gml/3.2': {\n    'LineString': makeArrayPusher(GMLBase.prototype.readLineString),\n    'Curve': makeArrayPusher(GML3.prototype.readCurve),\n  },\n};\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\nGML32.prototype.SURFACEMEMBER_PARSERS = {\n  'http://www.opengis.net/gml/3.2': {\n    'Polygon': makeArrayPusher(GMLBase.prototype.readPolygon),\n    'Surface': makeArrayPusher(GML3.prototype.readSurface),\n  },\n};\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\nGML32.prototype.SURFACE_PARSERS = {\n  'http://www.opengis.net/gml/3.2': {\n    'patches': makeReplacer(GML3.prototype.readPatch),\n  },\n};\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\nGML32.prototype.CURVE_PARSERS = {\n  'http://www.opengis.net/gml/3.2': {\n    'segments': makeReplacer(GML3.prototype.readSegment),\n  },\n};\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\nGML32.prototype.ENVELOPE_PARSERS = {\n  'http://www.opengis.net/gml/3.2': {\n    'lowerCorner': makeArrayPusher(GML3.prototype.readFlatPosList),\n    'upperCorner': makeArrayPusher(GML3.prototype.readFlatPosList),\n  },\n};\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\nGML32.prototype.PATCHES_PARSERS = {\n  'http://www.opengis.net/gml/3.2': {\n    'PolygonPatch': makeReplacer(GML3.prototype.readPolygonPatch),\n  },\n};\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\nGML32.prototype.SEGMENTS_PARSERS = {\n  'http://www.opengis.net/gml/3.2': {\n    'LineStringSegment': makeArrayExtender(\n      GML3.prototype.readLineStringSegment\n    ),\n  },\n};\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\nGML32.prototype.MULTIPOINT_PARSERS = {\n  'http://www.opengis.net/gml/3.2': {\n    'pointMember': makeArrayPusher(GMLBase.prototype.pointMemberParser),\n    'pointMembers': makeArrayPusher(GMLBase.prototype.pointMemberParser),\n  },\n};\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\nGML32.prototype.MULTILINESTRING_PARSERS = {\n  'http://www.opengis.net/gml/3.2': {\n    'lineStringMember': makeArrayPusher(\n      GMLBase.prototype.lineStringMemberParser\n    ),\n    'lineStringMembers': makeArrayPusher(\n      GMLBase.prototype.lineStringMemberParser\n    ),\n  },\n};\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\nGML32.prototype.MULTIPOLYGON_PARSERS = {\n  'http://www.opengis.net/gml/3.2': {\n    'polygonMember': makeArrayPusher(GMLBase.prototype.polygonMemberParser),\n    'polygonMembers': makeArrayPusher(GMLBase.prototype.polygonMemberParser),\n  },\n};\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\nGML32.prototype.POINTMEMBER_PARSERS = {\n  'http://www.opengis.net/gml/3.2': {\n    'Point': makeArrayPusher(GMLBase.prototype.readFlatCoordinatesFromNode),\n  },\n};\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\nGML32.prototype.LINESTRINGMEMBER_PARSERS = {\n  'http://www.opengis.net/gml/3.2': {\n    'LineString': makeArrayPusher(GMLBase.prototype.readLineString),\n  },\n};\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\nGML32.prototype.POLYGONMEMBER_PARSERS = {\n  'http://www.opengis.net/gml/3.2': {\n    'Polygon': makeArrayPusher(GMLBase.prototype.readPolygon),\n  },\n};\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\nGML32.prototype.RING_PARSERS = {\n  'http://www.opengis.net/gml/3.2': {\n    'LinearRing': makeReplacer(GMLBase.prototype.readFlatLinearRing),\n    'Ring': makeReplacer(GML32.prototype.readFlatCurveRing),\n  },\n};\n\n/**\n * @type {Object<string, Object<string, import(\"../xml.js\").Serializer>>}\n */\nGML32.prototype.RING_SERIALIZERS = {\n  'http://www.opengis.net/gml/3.2': {\n    'exterior': makeChildAppender(GML3.prototype.writeRing),\n    'interior': makeChildAppender(GML3.prototype.writeRing),\n  },\n};\n\n/**\n * @type {Object<string, Object<string, import(\"../xml.js\").Serializer>>}\n */\nGML32.prototype.ENVELOPE_SERIALIZERS = {\n  'http://www.opengis.net/gml/3.2': {\n    'lowerCorner': makeChildAppender(writeStringTextNode),\n    'upperCorner': makeChildAppender(writeStringTextNode),\n  },\n};\n\n/**\n * @type {Object<string, Object<string, import(\"../xml.js\").Serializer>>}\n */\nGML32.prototype.SURFACEORPOLYGONMEMBER_SERIALIZERS = {\n  'http://www.opengis.net/gml/3.2': {\n    'surfaceMember': makeChildAppender(\n      GML3.prototype.writeSurfaceOrPolygonMember\n    ),\n    'polygonMember': makeChildAppender(\n      GML3.prototype.writeSurfaceOrPolygonMember\n    ),\n  },\n};\n\n/**\n * @type {Object<string, Object<string, import(\"../xml.js\").Serializer>>}\n */\nGML32.prototype.POINTMEMBER_SERIALIZERS = {\n  'http://www.opengis.net/gml/3.2': {\n    'pointMember': makeChildAppender(GML3.prototype.writePointMember),\n  },\n};\n\n/**\n * @type {Object<string, Object<string, import(\"../xml.js\").Serializer>>}\n */\nGML32.prototype.LINESTRINGORCURVEMEMBER_SERIALIZERS = {\n  'http://www.opengis.net/gml/3.2': {\n    'lineStringMember': makeChildAppender(\n      GML3.prototype.writeLineStringOrCurveMember\n    ),\n    'curveMember': makeChildAppender(\n      GML3.prototype.writeLineStringOrCurveMember\n    ),\n  },\n};\n\n/**\n * @type {Object<string, Object<string, import(\"../xml.js\").Serializer>>}\n */\nGML32.prototype.GEOMETRY_SERIALIZERS = {\n  'http://www.opengis.net/gml/3.2': {\n    'Curve': makeChildAppender(GML3.prototype.writeCurveOrLineString),\n    'MultiCurve': makeChildAppender(GML3.prototype.writeMultiCurveOrLineString),\n    'Point': makeChildAppender(GML32.prototype.writePoint),\n    'MultiPoint': makeChildAppender(GML3.prototype.writeMultiPoint),\n    'LineString': makeChildAppender(GML3.prototype.writeCurveOrLineString),\n    'MultiLineString': makeChildAppender(\n      GML3.prototype.writeMultiCurveOrLineString\n    ),\n    'LinearRing': makeChildAppender(GML3.prototype.writeLinearRing),\n    'Polygon': makeChildAppender(GML3.prototype.writeSurfaceOrPolygon),\n    'MultiPolygon': makeChildAppender(\n      GML3.prototype.writeMultiSurfaceOrPolygon\n    ),\n    'Surface': makeChildAppender(GML3.prototype.writeSurfaceOrPolygon),\n    'MultiSurface': makeChildAppender(\n      GML3.prototype.writeMultiSurfaceOrPolygon\n    ),\n    'Envelope': makeChildAppender(GML3.prototype.writeEnvelope),\n  },\n};\n\nexport default GML32;\n","/**\n * @module ol/format/GPX\n */\nimport Feature from '../Feature.js';\nimport LineString from '../geom/LineString.js';\nimport MultiLineString from '../geom/MultiLineString.js';\nimport Point from '../geom/Point.js';\nimport XMLFeature from './XMLFeature.js';\nimport {\n  OBJECT_PROPERTY_NODE_FACTORY,\n  XML_SCHEMA_INSTANCE_URI,\n  createElementNS,\n  makeArrayPusher,\n  makeArraySerializer,\n  makeChildAppender,\n  makeObjectPropertySetter,\n  makeSequence,\n  makeSimpleNodeFactory,\n  makeStructureNS,\n  parseNode,\n  pushParseAndPop,\n  pushSerializeAndPop,\n} from '../xml.js';\nimport {get as getProjection} from '../proj.js';\nimport {\n  readDateTime,\n  readDecimal,\n  readPositiveInteger,\n  readString,\n  writeDateTimeTextNode,\n  writeDecimalTextNode,\n  writeNonNegativeIntegerTextNode,\n  writeStringTextNode,\n} from './xsd.js';\nimport {transformGeometryWithOptions} from './Feature.js';\n\n/**\n * @const\n * @type {Array<null|string>}\n */\nconst NAMESPACE_URIS = [\n  null,\n  'http://www.topografix.com/GPX/1/0',\n  'http://www.topografix.com/GPX/1/1',\n];\n\n/**\n * @const\n * @type {string}\n */\nconst SCHEMA_LOCATION =\n  'http://www.topografix.com/GPX/1/1 ' +\n  'http://www.topografix.com/GPX/1/1/gpx.xsd';\n\n/**\n * @const\n * @type {Object<string, function(Node, Array<*>): (Feature|undefined)>}\n */\nconst FEATURE_READER = {\n  'rte': readRte,\n  'trk': readTrk,\n  'wpt': readWpt,\n};\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst GPX_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'rte': makeArrayPusher(readRte),\n  'trk': makeArrayPusher(readTrk),\n  'wpt': makeArrayPusher(readWpt),\n});\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst LINK_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'text': makeObjectPropertySetter(readString, 'linkText'),\n  'type': makeObjectPropertySetter(readString, 'linkType'),\n});\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Serializer>>}\n */\n// @ts-ignore\nconst GPX_SERIALIZERS = makeStructureNS(NAMESPACE_URIS, {\n  'rte': makeChildAppender(writeRte),\n  'trk': makeChildAppender(writeTrk),\n  'wpt': makeChildAppender(writeWpt),\n});\n\n/**\n * @typedef {Object} Options\n * @property {function(Feature, Node):void} [readExtensions] Callback function\n * to process `extensions` nodes. To prevent memory leaks, this callback function must\n * not store any references to the node. Note that the `extensions`\n * node is not allowed in GPX 1.0. Moreover, only `extensions`\n * nodes from `wpt`, `rte` and `trk` can be processed, as those are\n * directly mapped to a feature.\n */\n\n/**\n * @typedef {Object} LayoutOptions\n * @property {boolean} [hasZ] HasZ.\n * @property {boolean} [hasM] HasM.\n */\n\n/**\n * @classdesc\n * Feature format for reading and writing data in the GPX format.\n *\n * Note that {@link module:ol/format/GPX~GPX#readFeature} only reads the first\n * feature of the source.\n *\n * When reading, routes (`<rte>`) are converted into LineString geometries, and\n * tracks (`<trk>`) into MultiLineString. Any properties on route and track\n * waypoints are ignored.\n *\n * When writing, LineString geometries are output as routes (`<rte>`), and\n * MultiLineString as tracks (`<trk>`).\n *\n * @api\n */\nclass GPX extends XMLFeature {\n  /**\n   * @param {Options} [options] Options.\n   */\n  constructor(options) {\n    super();\n\n    options = options ? options : {};\n\n    /**\n     * @type {import(\"../proj/Projection.js\").default}\n     */\n    this.dataProjection = getProjection('EPSG:4326');\n\n    /**\n     * @type {function(Feature, Node): void|undefined}\n     * @private\n     */\n    this.readExtensions_ = options.readExtensions;\n  }\n\n  /**\n   * @param {Array<Feature>} features List of features.\n   * @private\n   */\n  handleReadExtensions_(features) {\n    if (!features) {\n      features = [];\n    }\n    for (let i = 0, ii = features.length; i < ii; ++i) {\n      const feature = features[i];\n      if (this.readExtensions_) {\n        const extensionsNode = feature.get('extensionsNode_') || null;\n        this.readExtensions_(feature, extensionsNode);\n      }\n      feature.set('extensionsNode_', undefined);\n    }\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {import(\"./Feature.js\").ReadOptions} [options] Options.\n   * @return {import(\"../Feature.js\").default} Feature.\n   */\n  readFeatureFromNode(node, options) {\n    if (!NAMESPACE_URIS.includes(node.namespaceURI)) {\n      return null;\n    }\n    const featureReader = FEATURE_READER[node.localName];\n    if (!featureReader) {\n      return null;\n    }\n    const feature = featureReader(node, [this.getReadOptions(node, options)]);\n    if (!feature) {\n      return null;\n    }\n    this.handleReadExtensions_([feature]);\n    return feature;\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {import(\"./Feature.js\").ReadOptions} [options] Options.\n   * @return {Array<import(\"../Feature.js\").default>} Features.\n   */\n  readFeaturesFromNode(node, options) {\n    if (!NAMESPACE_URIS.includes(node.namespaceURI)) {\n      return [];\n    }\n    if (node.localName == 'gpx') {\n      /** @type {Array<Feature>} */\n      const features = pushParseAndPop([], GPX_PARSERS, node, [\n        this.getReadOptions(node, options),\n      ]);\n      if (features) {\n        this.handleReadExtensions_(features);\n        return features;\n      }\n      return [];\n    }\n    return [];\n  }\n\n  /**\n   * Encode an array of features in the GPX format as an XML node.\n   * LineString geometries are output as routes (`<rte>`), and MultiLineString\n   * as tracks (`<trk>`).\n   *\n   * @param {Array<Feature>} features Features.\n   * @param {import(\"./Feature.js\").WriteOptions} [options] Options.\n   * @return {Node} Node.\n   * @api\n   */\n  writeFeaturesNode(features, options) {\n    options = this.adaptOptions(options);\n    //FIXME Serialize metadata\n    const gpx = createElementNS('http://www.topografix.com/GPX/1/1', 'gpx');\n    const xmlnsUri = 'http://www.w3.org/2000/xmlns/';\n    gpx.setAttributeNS(xmlnsUri, 'xmlns:xsi', XML_SCHEMA_INSTANCE_URI);\n    gpx.setAttributeNS(\n      XML_SCHEMA_INSTANCE_URI,\n      'xsi:schemaLocation',\n      SCHEMA_LOCATION\n    );\n    gpx.setAttribute('version', '1.1');\n    gpx.setAttribute('creator', 'OpenLayers');\n\n    pushSerializeAndPop(\n      /** @type {import(\"../xml.js\").NodeStackItem} */\n      ({node: gpx}),\n      GPX_SERIALIZERS,\n      GPX_NODE_FACTORY,\n      features,\n      [options]\n    );\n    return gpx;\n  }\n}\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst RTE_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'name': makeObjectPropertySetter(readString),\n  'cmt': makeObjectPropertySetter(readString),\n  'desc': makeObjectPropertySetter(readString),\n  'src': makeObjectPropertySetter(readString),\n  'link': parseLink,\n  'number': makeObjectPropertySetter(readPositiveInteger),\n  'extensions': parseExtensions,\n  'type': makeObjectPropertySetter(readString),\n  'rtept': parseRtePt,\n});\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst RTEPT_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'ele': makeObjectPropertySetter(readDecimal),\n  'time': makeObjectPropertySetter(readDateTime),\n});\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst TRK_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'name': makeObjectPropertySetter(readString),\n  'cmt': makeObjectPropertySetter(readString),\n  'desc': makeObjectPropertySetter(readString),\n  'src': makeObjectPropertySetter(readString),\n  'link': parseLink,\n  'number': makeObjectPropertySetter(readPositiveInteger),\n  'type': makeObjectPropertySetter(readString),\n  'extensions': parseExtensions,\n  'trkseg': parseTrkSeg,\n});\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst TRKSEG_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'trkpt': parseTrkPt,\n});\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst TRKPT_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'ele': makeObjectPropertySetter(readDecimal),\n  'time': makeObjectPropertySetter(readDateTime),\n});\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst WPT_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'ele': makeObjectPropertySetter(readDecimal),\n  'time': makeObjectPropertySetter(readDateTime),\n  'magvar': makeObjectPropertySetter(readDecimal),\n  'geoidheight': makeObjectPropertySetter(readDecimal),\n  'name': makeObjectPropertySetter(readString),\n  'cmt': makeObjectPropertySetter(readString),\n  'desc': makeObjectPropertySetter(readString),\n  'src': makeObjectPropertySetter(readString),\n  'link': parseLink,\n  'sym': makeObjectPropertySetter(readString),\n  'type': makeObjectPropertySetter(readString),\n  'fix': makeObjectPropertySetter(readString),\n  'sat': makeObjectPropertySetter(readPositiveInteger),\n  'hdop': makeObjectPropertySetter(readDecimal),\n  'vdop': makeObjectPropertySetter(readDecimal),\n  'pdop': makeObjectPropertySetter(readDecimal),\n  'ageofdgpsdata': makeObjectPropertySetter(readDecimal),\n  'dgpsid': makeObjectPropertySetter(readPositiveInteger),\n  'extensions': parseExtensions,\n});\n\n/**\n * @const\n * @type {Array<string>}\n */\nconst LINK_SEQUENCE = ['text', 'type'];\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Serializer>>}\n */\n// @ts-ignore\nconst LINK_SERIALIZERS = makeStructureNS(NAMESPACE_URIS, {\n  'text': makeChildAppender(writeStringTextNode),\n  'type': makeChildAppender(writeStringTextNode),\n});\n\n/**\n * @const\n * @type {Object<string, Array<string>>}\n */\n// @ts-ignore\nconst RTE_SEQUENCE = makeStructureNS(NAMESPACE_URIS, [\n  'name',\n  'cmt',\n  'desc',\n  'src',\n  'link',\n  'number',\n  'type',\n  'rtept',\n]);\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Serializer>>}\n */\n// @ts-ignore\nconst RTE_SERIALIZERS = makeStructureNS(NAMESPACE_URIS, {\n  'name': makeChildAppender(writeStringTextNode),\n  'cmt': makeChildAppender(writeStringTextNode),\n  'desc': makeChildAppender(writeStringTextNode),\n  'src': makeChildAppender(writeStringTextNode),\n  'link': makeChildAppender(writeLink),\n  'number': makeChildAppender(writeNonNegativeIntegerTextNode),\n  'type': makeChildAppender(writeStringTextNode),\n  'rtept': makeArraySerializer(makeChildAppender(writeWptType)),\n});\n\n/**\n * @const\n * @type {Object<string, Array<string>>}\n */\n// @ts-ignore\nconst RTEPT_TYPE_SEQUENCE = makeStructureNS(NAMESPACE_URIS, ['ele', 'time']);\n\n/**\n * @const\n * @type {Object<string, Array<string>>}\n */\n// @ts-ignore\nconst TRK_SEQUENCE = makeStructureNS(NAMESPACE_URIS, [\n  'name',\n  'cmt',\n  'desc',\n  'src',\n  'link',\n  'number',\n  'type',\n  'trkseg',\n]);\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Serializer>>}\n */\n// @ts-ignore\nconst TRK_SERIALIZERS = makeStructureNS(NAMESPACE_URIS, {\n  'name': makeChildAppender(writeStringTextNode),\n  'cmt': makeChildAppender(writeStringTextNode),\n  'desc': makeChildAppender(writeStringTextNode),\n  'src': makeChildAppender(writeStringTextNode),\n  'link': makeChildAppender(writeLink),\n  'number': makeChildAppender(writeNonNegativeIntegerTextNode),\n  'type': makeChildAppender(writeStringTextNode),\n  'trkseg': makeArraySerializer(makeChildAppender(writeTrkSeg)),\n});\n\n/**\n * @const\n * @type {function(*, Array<*>, string=): (Node|undefined)}\n */\nconst TRKSEG_NODE_FACTORY = makeSimpleNodeFactory('trkpt');\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Serializer>>}\n */\n// @ts-ignore\nconst TRKSEG_SERIALIZERS = makeStructureNS(NAMESPACE_URIS, {\n  'trkpt': makeChildAppender(writeWptType),\n});\n\n/**\n * @const\n * @type {Object<string, Array<string>>}\n */\n// @ts-ignore\nconst WPT_TYPE_SEQUENCE = makeStructureNS(NAMESPACE_URIS, [\n  'ele',\n  'time',\n  'magvar',\n  'geoidheight',\n  'name',\n  'cmt',\n  'desc',\n  'src',\n  'link',\n  'sym',\n  'type',\n  'fix',\n  'sat',\n  'hdop',\n  'vdop',\n  'pdop',\n  'ageofdgpsdata',\n  'dgpsid',\n]);\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Serializer>>}\n */\n// @ts-ignore\nconst WPT_TYPE_SERIALIZERS = makeStructureNS(NAMESPACE_URIS, {\n  'ele': makeChildAppender(writeDecimalTextNode),\n  'time': makeChildAppender(writeDateTimeTextNode),\n  'magvar': makeChildAppender(writeDecimalTextNode),\n  'geoidheight': makeChildAppender(writeDecimalTextNode),\n  'name': makeChildAppender(writeStringTextNode),\n  'cmt': makeChildAppender(writeStringTextNode),\n  'desc': makeChildAppender(writeStringTextNode),\n  'src': makeChildAppender(writeStringTextNode),\n  'link': makeChildAppender(writeLink),\n  'sym': makeChildAppender(writeStringTextNode),\n  'type': makeChildAppender(writeStringTextNode),\n  'fix': makeChildAppender(writeStringTextNode),\n  'sat': makeChildAppender(writeNonNegativeIntegerTextNode),\n  'hdop': makeChildAppender(writeDecimalTextNode),\n  'vdop': makeChildAppender(writeDecimalTextNode),\n  'pdop': makeChildAppender(writeDecimalTextNode),\n  'ageofdgpsdata': makeChildAppender(writeDecimalTextNode),\n  'dgpsid': makeChildAppender(writeNonNegativeIntegerTextNode),\n});\n\n/**\n * @const\n * @type {Object<string, string>}\n */\nconst GEOMETRY_TYPE_TO_NODENAME = {\n  'Point': 'wpt',\n  'LineString': 'rte',\n  'MultiLineString': 'trk',\n};\n\n/**\n * @param {*} value Value.\n * @param {Array<*>} objectStack Object stack.\n * @param {string} [nodeName] Node name.\n * @return {Node|undefined} Node.\n */\nfunction GPX_NODE_FACTORY(value, objectStack, nodeName) {\n  const geometry = /** @type {Feature} */ (value).getGeometry();\n  if (geometry) {\n    const nodeName = GEOMETRY_TYPE_TO_NODENAME[geometry.getType()];\n    if (nodeName) {\n      const parentNode = objectStack[objectStack.length - 1].node;\n      return createElementNS(parentNode.namespaceURI, nodeName);\n    }\n  }\n}\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {LayoutOptions} layoutOptions Layout options.\n * @param {Element} node Node.\n * @param {!Object} values Values.\n * @return {Array<number>} Flat coordinates.\n */\nfunction appendCoordinate(flatCoordinates, layoutOptions, node, values) {\n  flatCoordinates.push(\n    parseFloat(node.getAttribute('lon')),\n    parseFloat(node.getAttribute('lat'))\n  );\n  if ('ele' in values) {\n    flatCoordinates.push(/** @type {number} */ (values['ele']));\n    delete values['ele'];\n    layoutOptions.hasZ = true;\n  } else {\n    flatCoordinates.push(0);\n  }\n  if ('time' in values) {\n    flatCoordinates.push(/** @type {number} */ (values['time']));\n    delete values['time'];\n    layoutOptions.hasM = true;\n  } else {\n    flatCoordinates.push(0);\n  }\n  return flatCoordinates;\n}\n\n/**\n * Choose GeometryLayout based on flags in layoutOptions and adjust flatCoordinates\n * and ends arrays by shrinking them accordingly (removing unused zero entries).\n *\n * @param {LayoutOptions} layoutOptions Layout options.\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {Array<number>} [ends] Ends.\n * @return {import(\"../geom/Geometry.js\").GeometryLayout} Layout.\n */\nfunction applyLayoutOptions(layoutOptions, flatCoordinates, ends) {\n  /** @type {import(\"../geom/Geometry.js\").GeometryLayout} */\n  let layout = 'XY';\n  let stride = 2;\n  if (layoutOptions.hasZ && layoutOptions.hasM) {\n    layout = 'XYZM';\n    stride = 4;\n  } else if (layoutOptions.hasZ) {\n    layout = 'XYZ';\n    stride = 3;\n  } else if (layoutOptions.hasM) {\n    layout = 'XYM';\n    stride = 3;\n  }\n  if (stride !== 4) {\n    for (let i = 0, ii = flatCoordinates.length / 4; i < ii; i++) {\n      flatCoordinates[i * stride] = flatCoordinates[i * 4];\n      flatCoordinates[i * stride + 1] = flatCoordinates[i * 4 + 1];\n      if (layoutOptions.hasZ) {\n        flatCoordinates[i * stride + 2] = flatCoordinates[i * 4 + 2];\n      }\n      if (layoutOptions.hasM) {\n        flatCoordinates[i * stride + 2] = flatCoordinates[i * 4 + 3];\n      }\n    }\n    flatCoordinates.length = (flatCoordinates.length / 4) * stride;\n    if (ends) {\n      for (let i = 0, ii = ends.length; i < ii; i++) {\n        ends[i] = (ends[i] / 4) * stride;\n      }\n    }\n  }\n  return layout;\n}\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n */\nfunction parseLink(node, objectStack) {\n  const values = /** @type {Object} */ (objectStack[objectStack.length - 1]);\n  const href = node.getAttribute('href');\n  if (href !== null) {\n    values['link'] = href;\n  }\n  parseNode(LINK_PARSERS, node, objectStack);\n}\n\n/**\n * @param {Node} node Node.\n * @param {Array<*>} objectStack Object stack.\n */\nfunction parseExtensions(node, objectStack) {\n  const values = /** @type {Object} */ (objectStack[objectStack.length - 1]);\n  values['extensionsNode_'] = node;\n}\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n */\nfunction parseRtePt(node, objectStack) {\n  const values = pushParseAndPop({}, RTEPT_PARSERS, node, objectStack);\n  if (values) {\n    const rteValues = /** @type {!Object} */ (\n      objectStack[objectStack.length - 1]\n    );\n    const flatCoordinates = /** @type {Array<number>} */ (\n      rteValues['flatCoordinates']\n    );\n    const layoutOptions = /** @type {LayoutOptions} */ (\n      rteValues['layoutOptions']\n    );\n    appendCoordinate(flatCoordinates, layoutOptions, node, values);\n  }\n}\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n */\nfunction parseTrkPt(node, objectStack) {\n  const values = pushParseAndPop({}, TRKPT_PARSERS, node, objectStack);\n  if (values) {\n    const trkValues = /** @type {!Object} */ (\n      objectStack[objectStack.length - 1]\n    );\n    const flatCoordinates = /** @type {Array<number>} */ (\n      trkValues['flatCoordinates']\n    );\n    const layoutOptions = /** @type {LayoutOptions} */ (\n      trkValues['layoutOptions']\n    );\n    appendCoordinate(flatCoordinates, layoutOptions, node, values);\n  }\n}\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n */\nfunction parseTrkSeg(node, objectStack) {\n  const values = /** @type {Object} */ (objectStack[objectStack.length - 1]);\n  parseNode(TRKSEG_PARSERS, node, objectStack);\n  const flatCoordinates =\n    /** @type {Array<number>} */\n    (values['flatCoordinates']);\n  const ends = /** @type {Array<number>} */ (values['ends']);\n  ends.push(flatCoordinates.length);\n}\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {Feature|undefined} Track.\n */\nfunction readRte(node, objectStack) {\n  const options = /** @type {import(\"./Feature.js\").ReadOptions} */ (\n    objectStack[0]\n  );\n  const values = pushParseAndPop(\n    {\n      'flatCoordinates': [],\n      'layoutOptions': {},\n    },\n    RTE_PARSERS,\n    node,\n    objectStack\n  );\n  if (!values) {\n    return undefined;\n  }\n  const flatCoordinates =\n    /** @type {Array<number>} */\n    (values['flatCoordinates']);\n  delete values['flatCoordinates'];\n  const layoutOptions = /** @type {LayoutOptions} */ (values['layoutOptions']);\n  delete values['layoutOptions'];\n  const layout = applyLayoutOptions(layoutOptions, flatCoordinates);\n  const geometry = new LineString(flatCoordinates, layout);\n  transformGeometryWithOptions(geometry, false, options);\n  const feature = new Feature(geometry);\n  feature.setProperties(values, true);\n  return feature;\n}\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {Feature|undefined} Track.\n */\nfunction readTrk(node, objectStack) {\n  const options = /** @type {import(\"./Feature.js\").ReadOptions} */ (\n    objectStack[0]\n  );\n  const values = pushParseAndPop(\n    {\n      'flatCoordinates': [],\n      'ends': [],\n      'layoutOptions': {},\n    },\n    TRK_PARSERS,\n    node,\n    objectStack\n  );\n  if (!values) {\n    return undefined;\n  }\n  const flatCoordinates =\n    /** @type {Array<number>} */\n    (values['flatCoordinates']);\n  delete values['flatCoordinates'];\n  const ends = /** @type {Array<number>} */ (values['ends']);\n  delete values['ends'];\n  const layoutOptions = /** @type {LayoutOptions} */ (values['layoutOptions']);\n  delete values['layoutOptions'];\n  const layout = applyLayoutOptions(layoutOptions, flatCoordinates, ends);\n  const geometry = new MultiLineString(flatCoordinates, layout, ends);\n  transformGeometryWithOptions(geometry, false, options);\n  const feature = new Feature(geometry);\n  feature.setProperties(values, true);\n  return feature;\n}\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {Feature|undefined} Waypoint.\n */\nfunction readWpt(node, objectStack) {\n  const options = /** @type {import(\"./Feature.js\").ReadOptions} */ (\n    objectStack[0]\n  );\n  const values = pushParseAndPop({}, WPT_PARSERS, node, objectStack);\n  if (!values) {\n    return undefined;\n  }\n  const layoutOptions = /** @type {LayoutOptions} */ ({});\n  const coordinates = appendCoordinate([], layoutOptions, node, values);\n  const layout = applyLayoutOptions(layoutOptions, coordinates);\n  const geometry = new Point(coordinates, layout);\n  transformGeometryWithOptions(geometry, false, options);\n  const feature = new Feature(geometry);\n  feature.setProperties(values, true);\n  return feature;\n}\n\n/**\n * @param {Element} node Node.\n * @param {string} value Value for the link's `href` attribute.\n * @param {Array<*>} objectStack Node stack.\n */\nfunction writeLink(node, value, objectStack) {\n  node.setAttribute('href', value);\n  const context = objectStack[objectStack.length - 1];\n  const properties = context['properties'];\n  const link = [properties['linkText'], properties['linkType']];\n  pushSerializeAndPop(\n    /** @type {import(\"../xml.js\").NodeStackItem} */ ({node: node}),\n    LINK_SERIALIZERS,\n    OBJECT_PROPERTY_NODE_FACTORY,\n    link,\n    objectStack,\n    LINK_SEQUENCE\n  );\n}\n\n/**\n * @param {Element} node Node.\n * @param {import(\"../coordinate.js\").Coordinate} coordinate Coordinate.\n * @param {Array<*>} objectStack Object stack.\n */\nfunction writeWptType(node, coordinate, objectStack) {\n  const context = objectStack[objectStack.length - 1];\n  const parentNode = context.node;\n  const namespaceURI = parentNode.namespaceURI;\n  const properties = context['properties'];\n  //FIXME Projection handling\n  node.setAttributeNS(null, 'lat', String(coordinate[1]));\n  node.setAttributeNS(null, 'lon', String(coordinate[0]));\n  const geometryLayout = context['geometryLayout'];\n  switch (geometryLayout) {\n    case 'XYZM':\n      if (coordinate[3] !== 0) {\n        properties['time'] = coordinate[3];\n      }\n    // fall through\n    case 'XYZ':\n      if (coordinate[2] !== 0) {\n        properties['ele'] = coordinate[2];\n      }\n      break;\n    case 'XYM':\n      if (coordinate[2] !== 0) {\n        properties['time'] = coordinate[2];\n      }\n      break;\n    default:\n    // pass\n  }\n  const orderedKeys =\n    node.nodeName == 'rtept'\n      ? RTEPT_TYPE_SEQUENCE[namespaceURI]\n      : WPT_TYPE_SEQUENCE[namespaceURI];\n  const values = makeSequence(properties, orderedKeys);\n  pushSerializeAndPop(\n    /** @type {import(\"../xml.js\").NodeStackItem} */\n    ({node: node, 'properties': properties}),\n    WPT_TYPE_SERIALIZERS,\n    OBJECT_PROPERTY_NODE_FACTORY,\n    values,\n    objectStack,\n    orderedKeys\n  );\n}\n\n/**\n * @param {Node} node Node.\n * @param {Feature} feature Feature.\n * @param {Array<*>} objectStack Object stack.\n */\nfunction writeRte(node, feature, objectStack) {\n  const options = /** @type {import(\"./Feature.js\").WriteOptions} */ (\n    objectStack[0]\n  );\n  const properties = feature.getProperties();\n  const context = {node: node};\n  context['properties'] = properties;\n  const geometry = feature.getGeometry();\n  if (geometry.getType() == 'LineString') {\n    const lineString = /** @type {LineString} */ (\n      transformGeometryWithOptions(geometry, true, options)\n    );\n    context['geometryLayout'] = lineString.getLayout();\n    properties['rtept'] = lineString.getCoordinates();\n  }\n  const parentNode = objectStack[objectStack.length - 1].node;\n  const orderedKeys = RTE_SEQUENCE[parentNode.namespaceURI];\n  const values = makeSequence(properties, orderedKeys);\n  pushSerializeAndPop(\n    context,\n    RTE_SERIALIZERS,\n    OBJECT_PROPERTY_NODE_FACTORY,\n    values,\n    objectStack,\n    orderedKeys\n  );\n}\n\n/**\n * @param {Element} node Node.\n * @param {Feature} feature Feature.\n * @param {Array<*>} objectStack Object stack.\n */\nfunction writeTrk(node, feature, objectStack) {\n  const options = /** @type {import(\"./Feature.js\").WriteOptions} */ (\n    objectStack[0]\n  );\n  const properties = feature.getProperties();\n  /** @type {import(\"../xml.js\").NodeStackItem} */\n  const context = {node: node};\n  context['properties'] = properties;\n  const geometry = feature.getGeometry();\n  if (geometry.getType() == 'MultiLineString') {\n    const multiLineString = /** @type {MultiLineString} */ (\n      transformGeometryWithOptions(geometry, true, options)\n    );\n    properties['trkseg'] = multiLineString.getLineStrings();\n  }\n  const parentNode = objectStack[objectStack.length - 1].node;\n  const orderedKeys = TRK_SEQUENCE[parentNode.namespaceURI];\n  const values = makeSequence(properties, orderedKeys);\n  pushSerializeAndPop(\n    context,\n    TRK_SERIALIZERS,\n    OBJECT_PROPERTY_NODE_FACTORY,\n    values,\n    objectStack,\n    orderedKeys\n  );\n}\n\n/**\n * @param {Element} node Node.\n * @param {LineString} lineString LineString.\n * @param {Array<*>} objectStack Object stack.\n */\nfunction writeTrkSeg(node, lineString, objectStack) {\n  /** @type {import(\"../xml.js\").NodeStackItem} */\n  const context = {node: node};\n  context['geometryLayout'] = lineString.getLayout();\n  context['properties'] = {};\n  pushSerializeAndPop(\n    context,\n    TRKSEG_SERIALIZERS,\n    TRKSEG_NODE_FACTORY,\n    lineString.getCoordinates(),\n    objectStack\n  );\n}\n\n/**\n * @param {Element} node Node.\n * @param {Feature} feature Feature.\n * @param {Array<*>} objectStack Object stack.\n */\nfunction writeWpt(node, feature, objectStack) {\n  const options = /** @type {import(\"./Feature.js\").WriteOptions} */ (\n    objectStack[0]\n  );\n  const context = objectStack[objectStack.length - 1];\n  context['properties'] = feature.getProperties();\n  const geometry = feature.getGeometry();\n  if (geometry.getType() == 'Point') {\n    const point = /** @type {Point} */ (\n      transformGeometryWithOptions(geometry, true, options)\n    );\n    context['geometryLayout'] = point.getLayout();\n    writeWptType(node, point.getCoordinates(), objectStack);\n  }\n}\n\nexport default GPX;\n","/**\n * @module ol/format/GeoJSON\n */\n\nimport Feature from '../Feature.js';\nimport GeometryCollection from '../geom/GeometryCollection.js';\nimport JSONFeature from './JSONFeature.js';\nimport LineString from '../geom/LineString.js';\nimport MultiLineString from '../geom/MultiLineString.js';\nimport MultiPoint from '../geom/MultiPoint.js';\nimport MultiPolygon from '../geom/MultiPolygon.js';\nimport Point from '../geom/Point.js';\nimport Polygon from '../geom/Polygon.js';\nimport {assert} from '../asserts.js';\nimport {get as getProjection} from '../proj.js';\nimport {isEmpty} from '../obj.js';\nimport {transformGeometryWithOptions} from './Feature.js';\n\n/**\n * @typedef {import(\"geojson\").GeoJSON} GeoJSONObject\n * @typedef {import(\"geojson\").Feature} GeoJSONFeature\n * @typedef {import(\"geojson\").FeatureCollection} GeoJSONFeatureCollection\n * @typedef {import(\"geojson\").Geometry} GeoJSONGeometry\n * @typedef {import(\"geojson\").Point} GeoJSONPoint\n * @typedef {import(\"geojson\").LineString} GeoJSONLineString\n * @typedef {import(\"geojson\").Polygon} GeoJSONPolygon\n * @typedef {import(\"geojson\").MultiPoint} GeoJSONMultiPoint\n * @typedef {import(\"geojson\").MultiLineString} GeoJSONMultiLineString\n * @typedef {import(\"geojson\").MultiPolygon} GeoJSONMultiPolygon\n * @typedef {import(\"geojson\").GeometryCollection} GeoJSONGeometryCollection\n */\n\n/**\n * @typedef {Object} Options\n * @property {import(\"../proj.js\").ProjectionLike} [dataProjection='EPSG:4326'] Default data projection.\n * @property {import(\"../proj.js\").ProjectionLike} [featureProjection] Projection for features read or\n * written by the format.  Options passed to read or write methods will take precedence.\n * @property {string} [geometryName] Geometry name to use when creating features.\n * @property {boolean} [extractGeometryName=false] Certain GeoJSON providers include\n * the geometry_name field in the feature GeoJSON. If set to `true` the GeoJSON reader\n * will look for that field to set the geometry name. If both this field is set to `true`\n * and a `geometryName` is provided, the `geometryName` will take precedence.\n */\n\n/**\n * @classdesc\n * Feature format for reading and writing data in the GeoJSON format.\n *\n * @api\n */\nclass GeoJSON extends JSONFeature {\n  /**\n   * @param {Options} [options] Options.\n   */\n  constructor(options) {\n    options = options ? options : {};\n\n    super();\n\n    /**\n     * @type {import(\"../proj/Projection.js\").default}\n     */\n    this.dataProjection = getProjection(\n      options.dataProjection ? options.dataProjection : 'EPSG:4326'\n    );\n\n    if (options.featureProjection) {\n      /**\n       * @type {import(\"../proj/Projection.js\").default}\n       */\n      this.defaultFeatureProjection = getProjection(options.featureProjection);\n    }\n\n    /**\n     * Name of the geometry attribute for features.\n     * @type {string|undefined}\n     * @private\n     */\n    this.geometryName_ = options.geometryName;\n\n    /**\n     * Look for the geometry name in the feature GeoJSON\n     * @type {boolean|undefined}\n     * @private\n     */\n    this.extractGeometryName_ = options.extractGeometryName;\n\n    this.supportedMediaTypes = [\n      'application/geo+json',\n      'application/vnd.geo+json',\n    ];\n  }\n\n  /**\n   * @param {Object} object Object.\n   * @param {import(\"./Feature.js\").ReadOptions} [options] Read options.\n   * @protected\n   * @return {import(\"../Feature.js\").default} Feature.\n   */\n  readFeatureFromObject(object, options) {\n    /**\n     * @type {GeoJSONFeature}\n     */\n    let geoJSONFeature = null;\n    if (object['type'] === 'Feature') {\n      geoJSONFeature = /** @type {GeoJSONFeature} */ (object);\n    } else {\n      geoJSONFeature = {\n        'type': 'Feature',\n        'geometry': /** @type {GeoJSONGeometry} */ (object),\n        'properties': null,\n      };\n    }\n\n    const geometry = readGeometry(geoJSONFeature['geometry'], options);\n    const feature = new Feature();\n    if (this.geometryName_) {\n      feature.setGeometryName(this.geometryName_);\n    } else if (\n      this.extractGeometryName_ &&\n      'geometry_name' in geoJSONFeature !== undefined\n    ) {\n      feature.setGeometryName(geoJSONFeature['geometry_name']);\n    }\n    feature.setGeometry(geometry);\n\n    if ('id' in geoJSONFeature) {\n      feature.setId(geoJSONFeature['id']);\n    }\n\n    if (geoJSONFeature['properties']) {\n      feature.setProperties(geoJSONFeature['properties'], true);\n    }\n    return feature;\n  }\n\n  /**\n   * @param {Object} object Object.\n   * @param {import(\"./Feature.js\").ReadOptions} [options] Read options.\n   * @protected\n   * @return {Array<Feature>} Features.\n   */\n  readFeaturesFromObject(object, options) {\n    const geoJSONObject = /** @type {GeoJSONObject} */ (object);\n    /** @type {Array<import(\"../Feature.js\").default>} */\n    let features = null;\n    if (geoJSONObject['type'] === 'FeatureCollection') {\n      const geoJSONFeatureCollection = /** @type {GeoJSONFeatureCollection} */ (\n        object\n      );\n      features = [];\n      const geoJSONFeatures = geoJSONFeatureCollection['features'];\n      for (let i = 0, ii = geoJSONFeatures.length; i < ii; ++i) {\n        features.push(this.readFeatureFromObject(geoJSONFeatures[i], options));\n      }\n    } else {\n      features = [this.readFeatureFromObject(object, options)];\n    }\n    return features;\n  }\n\n  /**\n   * @param {GeoJSONGeometry} object Object.\n   * @param {import(\"./Feature.js\").ReadOptions} [options] Read options.\n   * @protected\n   * @return {import(\"../geom/Geometry.js\").default} Geometry.\n   */\n  readGeometryFromObject(object, options) {\n    return readGeometry(object, options);\n  }\n\n  /**\n   * @param {Object} object Object.\n   * @protected\n   * @return {import(\"../proj/Projection.js\").default} Projection.\n   */\n  readProjectionFromObject(object) {\n    const crs = object['crs'];\n    let projection;\n    if (crs) {\n      if (crs['type'] == 'name') {\n        projection = getProjection(crs['properties']['name']);\n      } else if (crs['type'] === 'EPSG') {\n        projection = getProjection('EPSG:' + crs['properties']['code']);\n      } else {\n        assert(false, 36); // Unknown SRS type\n      }\n    } else {\n      projection = this.dataProjection;\n    }\n    return /** @type {import(\"../proj/Projection.js\").default} */ (projection);\n  }\n\n  /**\n   * Encode a feature as a GeoJSON Feature object.\n   *\n   * @param {import(\"../Feature.js\").default} feature Feature.\n   * @param {import(\"./Feature.js\").WriteOptions} [options] Write options.\n   * @return {GeoJSONFeature} Object.\n   * @api\n   */\n  writeFeatureObject(feature, options) {\n    options = this.adaptOptions(options);\n\n    /** @type {GeoJSONFeature} */\n    const object = {\n      'type': 'Feature',\n      geometry: null,\n      properties: null,\n    };\n\n    const id = feature.getId();\n    if (id !== undefined) {\n      object.id = id;\n    }\n\n    if (!feature.hasProperties()) {\n      return object;\n    }\n\n    const properties = feature.getProperties();\n    const geometry = feature.getGeometry();\n    if (geometry) {\n      object.geometry = writeGeometry(geometry, options);\n\n      delete properties[feature.getGeometryName()];\n    }\n\n    if (!isEmpty(properties)) {\n      object.properties = properties;\n    }\n\n    return object;\n  }\n\n  /**\n   * Encode an array of features as a GeoJSON object.\n   *\n   * @param {Array<import(\"../Feature.js\").default>} features Features.\n   * @param {import(\"./Feature.js\").WriteOptions} [options] Write options.\n   * @return {GeoJSONFeatureCollection} GeoJSON Object.\n   * @api\n   */\n  writeFeaturesObject(features, options) {\n    options = this.adaptOptions(options);\n    const objects = [];\n    for (let i = 0, ii = features.length; i < ii; ++i) {\n      objects.push(this.writeFeatureObject(features[i], options));\n    }\n    return {\n      type: 'FeatureCollection',\n      features: objects,\n    };\n  }\n\n  /**\n   * Encode a geometry as a GeoJSON object.\n   *\n   * @param {import(\"../geom/Geometry.js\").default} geometry Geometry.\n   * @param {import(\"./Feature.js\").WriteOptions} [options] Write options.\n   * @return {GeoJSONGeometry|GeoJSONGeometryCollection} Object.\n   * @api\n   */\n  writeGeometryObject(geometry, options) {\n    return writeGeometry(geometry, this.adaptOptions(options));\n  }\n}\n\n/**\n * @param {GeoJSONGeometry|GeoJSONGeometryCollection} object Object.\n * @param {import(\"./Feature.js\").ReadOptions} [options] Read options.\n * @return {import(\"../geom/Geometry.js\").default} Geometry.\n */\nfunction readGeometry(object, options) {\n  if (!object) {\n    return null;\n  }\n\n  /**\n   * @type {import(\"../geom/Geometry.js\").default}\n   */\n  let geometry;\n  switch (object['type']) {\n    case 'Point': {\n      geometry = readPointGeometry(/** @type {GeoJSONPoint} */ (object));\n      break;\n    }\n    case 'LineString': {\n      geometry = readLineStringGeometry(\n        /** @type {GeoJSONLineString} */ (object)\n      );\n      break;\n    }\n    case 'Polygon': {\n      geometry = readPolygonGeometry(/** @type {GeoJSONPolygon} */ (object));\n      break;\n    }\n    case 'MultiPoint': {\n      geometry = readMultiPointGeometry(\n        /** @type {GeoJSONMultiPoint} */ (object)\n      );\n      break;\n    }\n    case 'MultiLineString': {\n      geometry = readMultiLineStringGeometry(\n        /** @type {GeoJSONMultiLineString} */ (object)\n      );\n      break;\n    }\n    case 'MultiPolygon': {\n      geometry = readMultiPolygonGeometry(\n        /** @type {GeoJSONMultiPolygon} */ (object)\n      );\n      break;\n    }\n    case 'GeometryCollection': {\n      geometry = readGeometryCollectionGeometry(\n        /** @type {GeoJSONGeometryCollection} */ (object)\n      );\n      break;\n    }\n    default: {\n      throw new Error('Unsupported GeoJSON type: ' + object['type']);\n    }\n  }\n  return transformGeometryWithOptions(geometry, false, options);\n}\n\n/**\n * @param {GeoJSONGeometryCollection} object Object.\n * @param {import(\"./Feature.js\").ReadOptions} [options] Read options.\n * @return {GeometryCollection} Geometry collection.\n */\nfunction readGeometryCollectionGeometry(object, options) {\n  const geometries = object['geometries'].map(\n    /**\n     * @param {GeoJSONGeometry} geometry Geometry.\n     * @return {import(\"../geom/Geometry.js\").default} geometry Geometry.\n     */\n    function (geometry) {\n      return readGeometry(geometry, options);\n    }\n  );\n  return new GeometryCollection(geometries);\n}\n\n/**\n * @param {GeoJSONPoint} object Object.\n * @return {Point} Point.\n */\nfunction readPointGeometry(object) {\n  return new Point(object['coordinates']);\n}\n\n/**\n * @param {GeoJSONLineString} object Object.\n * @return {LineString} LineString.\n */\nfunction readLineStringGeometry(object) {\n  return new LineString(object['coordinates']);\n}\n\n/**\n * @param {GeoJSONMultiLineString} object Object.\n * @return {MultiLineString} MultiLineString.\n */\nfunction readMultiLineStringGeometry(object) {\n  return new MultiLineString(object['coordinates']);\n}\n\n/**\n * @param {GeoJSONMultiPoint} object Object.\n * @return {MultiPoint} MultiPoint.\n */\nfunction readMultiPointGeometry(object) {\n  return new MultiPoint(object['coordinates']);\n}\n\n/**\n * @param {GeoJSONMultiPolygon} object Object.\n * @return {MultiPolygon} MultiPolygon.\n */\nfunction readMultiPolygonGeometry(object) {\n  return new MultiPolygon(object['coordinates']);\n}\n\n/**\n * @param {GeoJSONPolygon} object Object.\n * @return {Polygon} Polygon.\n */\nfunction readPolygonGeometry(object) {\n  return new Polygon(object['coordinates']);\n}\n\n/**\n * @param {import(\"../geom/Geometry.js\").default} geometry Geometry.\n * @param {import(\"./Feature.js\").WriteOptions} [options] Write options.\n * @return {GeoJSONGeometry} GeoJSON geometry.\n */\nfunction writeGeometry(geometry, options) {\n  geometry = transformGeometryWithOptions(geometry, true, options);\n  const type = geometry.getType();\n\n  /** @type {GeoJSONGeometry} */\n  let geoJSON;\n  switch (type) {\n    case 'Point': {\n      geoJSON = writePointGeometry(/** @type {Point} */ (geometry), options);\n      break;\n    }\n    case 'LineString': {\n      geoJSON = writeLineStringGeometry(\n        /** @type {LineString} */ (geometry),\n        options\n      );\n      break;\n    }\n    case 'Polygon': {\n      geoJSON = writePolygonGeometry(\n        /** @type {Polygon} */ (geometry),\n        options\n      );\n      break;\n    }\n    case 'MultiPoint': {\n      geoJSON = writeMultiPointGeometry(\n        /** @type {MultiPoint} */ (geometry),\n        options\n      );\n      break;\n    }\n    case 'MultiLineString': {\n      geoJSON = writeMultiLineStringGeometry(\n        /** @type {MultiLineString} */ (geometry),\n        options\n      );\n      break;\n    }\n    case 'MultiPolygon': {\n      geoJSON = writeMultiPolygonGeometry(\n        /** @type {MultiPolygon} */ (geometry),\n        options\n      );\n      break;\n    }\n    case 'GeometryCollection': {\n      geoJSON = writeGeometryCollectionGeometry(\n        /** @type {GeometryCollection} */ (geometry),\n        options\n      );\n      break;\n    }\n    case 'Circle': {\n      geoJSON = {\n        type: 'GeometryCollection',\n        geometries: [],\n      };\n      break;\n    }\n    default: {\n      throw new Error('Unsupported geometry type: ' + type);\n    }\n  }\n  return geoJSON;\n}\n\n/**\n * @param {GeometryCollection} geometry Geometry.\n * @param {import(\"./Feature.js\").WriteOptions} [options] Write options.\n * @return {GeoJSONGeometryCollection} GeoJSON geometry collection.\n */\nfunction writeGeometryCollectionGeometry(geometry, options) {\n  options = Object.assign({}, options);\n  delete options.featureProjection;\n  const geometries = geometry.getGeometriesArray().map(function (geometry) {\n    return writeGeometry(geometry, options);\n  });\n  return {\n    type: 'GeometryCollection',\n    geometries: geometries,\n  };\n}\n\n/**\n * @param {LineString} geometry Geometry.\n * @param {import(\"./Feature.js\").WriteOptions} [options] Write options.\n * @return {GeoJSONGeometry} GeoJSON geometry.\n */\nfunction writeLineStringGeometry(geometry, options) {\n  return {\n    type: 'LineString',\n    coordinates: geometry.getCoordinates(),\n  };\n}\n\n/**\n * @param {MultiLineString} geometry Geometry.\n * @param {import(\"./Feature.js\").WriteOptions} [options] Write options.\n * @return {GeoJSONGeometry} GeoJSON geometry.\n */\nfunction writeMultiLineStringGeometry(geometry, options) {\n  return {\n    type: 'MultiLineString',\n    coordinates: geometry.getCoordinates(),\n  };\n}\n\n/**\n * @param {MultiPoint} geometry Geometry.\n * @param {import(\"./Feature.js\").WriteOptions} [options] Write options.\n * @return {GeoJSONGeometry} GeoJSON geometry.\n */\nfunction writeMultiPointGeometry(geometry, options) {\n  return {\n    type: 'MultiPoint',\n    coordinates: geometry.getCoordinates(),\n  };\n}\n\n/**\n * @param {MultiPolygon} geometry Geometry.\n * @param {import(\"./Feature.js\").WriteOptions} [options] Write options.\n * @return {GeoJSONGeometry} GeoJSON geometry.\n */\nfunction writeMultiPolygonGeometry(geometry, options) {\n  let right;\n  if (options) {\n    right = options.rightHanded;\n  }\n  return {\n    type: 'MultiPolygon',\n    coordinates: geometry.getCoordinates(right),\n  };\n}\n\n/**\n * @param {Point} geometry Geometry.\n * @param {import(\"./Feature.js\").WriteOptions} [options] Write options.\n * @return {GeoJSONGeometry} GeoJSON geometry.\n */\nfunction writePointGeometry(geometry, options) {\n  return {\n    type: 'Point',\n    coordinates: geometry.getCoordinates(),\n  };\n}\n\n/**\n * @param {Polygon} geometry Geometry.\n * @param {import(\"./Feature.js\").WriteOptions} [options] Write options.\n * @return {GeoJSONGeometry} GeoJSON geometry.\n */\nfunction writePolygonGeometry(geometry, options) {\n  let right;\n  if (options) {\n    right = options.rightHanded;\n  }\n  return {\n    type: 'Polygon',\n    coordinates: geometry.getCoordinates(right),\n  };\n}\n\nexport default GeoJSON;\n","/**\n * @module ol/format/TextFeature\n */\nimport FeatureFormat from '../format/Feature.js';\nimport {abstract} from '../util.js';\n\n/**\n * @classdesc\n * Abstract base class; normally only used for creating subclasses and not\n * instantiated in apps.\n * Base class for text feature formats.\n *\n * @abstract\n */\nclass TextFeature extends FeatureFormat {\n  constructor() {\n    super();\n  }\n\n  /**\n   * @return {import(\"./Feature.js\").Type} Format.\n   */\n  getType() {\n    return 'text';\n  }\n\n  /**\n   * Read the feature from the source.\n   *\n   * @param {Document|Element|Object|string} source Source.\n   * @param {import(\"./Feature.js\").ReadOptions} [options] Read options.\n   * @return {import(\"../Feature.js\").default} Feature.\n   * @api\n   */\n  readFeature(source, options) {\n    return this.readFeatureFromText(\n      getText(source),\n      this.adaptOptions(options)\n    );\n  }\n\n  /**\n   * @abstract\n   * @param {string} text Text.\n   * @param {import(\"./Feature.js\").ReadOptions} [options] Read options.\n   * @protected\n   * @return {import(\"../Feature.js\").default} Feature.\n   */\n  readFeatureFromText(text, options) {\n    return abstract();\n  }\n\n  /**\n   * Read the features from the source.\n   *\n   * @param {Document|Element|Object|string} source Source.\n   * @param {import(\"./Feature.js\").ReadOptions} [options] Read options.\n   * @return {Array<import(\"../Feature.js\").default>} Features.\n   * @api\n   */\n  readFeatures(source, options) {\n    return this.readFeaturesFromText(\n      getText(source),\n      this.adaptOptions(options)\n    );\n  }\n\n  /**\n   * @abstract\n   * @param {string} text Text.\n   * @param {import(\"./Feature.js\").ReadOptions} [options] Read options.\n   * @protected\n   * @return {Array<import(\"../Feature.js\").default>} Features.\n   */\n  readFeaturesFromText(text, options) {\n    return abstract();\n  }\n\n  /**\n   * Read the geometry from the source.\n   *\n   * @param {Document|Element|Object|string} source Source.\n   * @param {import(\"./Feature.js\").ReadOptions} [options] Read options.\n   * @return {import(\"../geom/Geometry.js\").default} Geometry.\n   * @api\n   */\n  readGeometry(source, options) {\n    return this.readGeometryFromText(\n      getText(source),\n      this.adaptOptions(options)\n    );\n  }\n\n  /**\n   * @abstract\n   * @param {string} text Text.\n   * @param {import(\"./Feature.js\").ReadOptions} [options] Read options.\n   * @protected\n   * @return {import(\"../geom/Geometry.js\").default} Geometry.\n   */\n  readGeometryFromText(text, options) {\n    return abstract();\n  }\n\n  /**\n   * Read the projection from the source.\n   *\n   * @param {Document|Element|Object|string} source Source.\n   * @return {import(\"../proj/Projection.js\").default|undefined} Projection.\n   * @api\n   */\n  readProjection(source) {\n    return this.readProjectionFromText(getText(source));\n  }\n\n  /**\n   * @param {string} text Text.\n   * @protected\n   * @return {import(\"../proj/Projection.js\").default|undefined} Projection.\n   */\n  readProjectionFromText(text) {\n    return this.dataProjection;\n  }\n\n  /**\n   * Encode a feature as a string.\n   *\n   * @param {import(\"../Feature.js\").default} feature Feature.\n   * @param {import(\"./Feature.js\").WriteOptions} [options] Write options.\n   * @return {string} Encoded feature.\n   * @api\n   */\n  writeFeature(feature, options) {\n    return this.writeFeatureText(feature, this.adaptOptions(options));\n  }\n\n  /**\n   * @abstract\n   * @param {import(\"../Feature.js\").default} feature Features.\n   * @param {import(\"./Feature.js\").WriteOptions} [options] Write options.\n   * @protected\n   * @return {string} Text.\n   */\n  writeFeatureText(feature, options) {\n    return abstract();\n  }\n\n  /**\n   * Encode an array of features as string.\n   *\n   * @param {Array<import(\"../Feature.js\").default>} features Features.\n   * @param {import(\"./Feature.js\").WriteOptions} [options] Write options.\n   * @return {string} Encoded features.\n   * @api\n   */\n  writeFeatures(features, options) {\n    return this.writeFeaturesText(features, this.adaptOptions(options));\n  }\n\n  /**\n   * @abstract\n   * @param {Array<import(\"../Feature.js\").default>} features Features.\n   * @param {import(\"./Feature.js\").WriteOptions} [options] Write options.\n   * @protected\n   * @return {string} Text.\n   */\n  writeFeaturesText(features, options) {\n    return abstract();\n  }\n\n  /**\n   * Write a single geometry.\n   *\n   * @param {import(\"../geom/Geometry.js\").default} geometry Geometry.\n   * @param {import(\"./Feature.js\").WriteOptions} [options] Write options.\n   * @return {string} Geometry.\n   * @api\n   */\n  writeGeometry(geometry, options) {\n    return this.writeGeometryText(geometry, this.adaptOptions(options));\n  }\n\n  /**\n   * @abstract\n   * @param {import(\"../geom/Geometry.js\").default} geometry Geometry.\n   * @param {import(\"./Feature.js\").WriteOptions} [options] Write options.\n   * @protected\n   * @return {string} Text.\n   */\n  writeGeometryText(geometry, options) {\n    return abstract();\n  }\n}\n\n/**\n * @param {Document|Element|Object|string} source Source.\n * @return {string} Text.\n */\nfunction getText(source) {\n  if (typeof source === 'string') {\n    return source;\n  }\n  return '';\n}\n\nexport default TextFeature;\n","/**\n * @module ol/format/IGC\n */\nimport Feature from '../Feature.js';\nimport LineString from '../geom/LineString.js';\nimport TextFeature from './TextFeature.js';\nimport {get as getProjection} from '../proj.js';\nimport {transformGeometryWithOptions} from './Feature.js';\n\n/**\n * @typedef {'barometric' | 'gps' | 'none'} IGCZ\n * IGC altitude/z. One of 'barometric', 'gps', 'none'.\n */\n\n/**\n * @const\n * @type {RegExp}\n */\nconst B_RECORD_RE =\n  /^B(\\d{2})(\\d{2})(\\d{2})(\\d{2})(\\d{5})([NS])(\\d{3})(\\d{5})([EW])([AV])(\\d{5})(\\d{5})/;\n\n/**\n * @const\n * @type {RegExp}\n */\nconst H_RECORD_RE = /^H.([A-Z]{3}).*?:(.*)/;\n\n/**\n * @const\n * @type {RegExp}\n */\nconst HFDTE_RECORD_RE = /^HFDTE(\\d{2})(\\d{2})(\\d{2})/;\n\n/**\n * A regular expression matching the newline characters `\\r\\n`, `\\r` and `\\n`.\n *\n * @const\n * @type {RegExp}\n */\nconst NEWLINE_RE = /\\r\\n|\\r|\\n/;\n\n/**\n * @typedef {Object} Options\n * @property {IGCZ} [altitudeMode='none'] Altitude mode. Possible\n * values are `'barometric'`, `'gps'`, and `'none'`.\n */\n\n/**\n * @classdesc\n * Feature format for `*.igc` flight recording files.\n *\n * As IGC sources contain a single feature,\n * {@link module:ol/format/IGC~IGC#readFeatures} will return the feature in an\n * array\n *\n * @api\n */\nclass IGC extends TextFeature {\n  /**\n   * @param {Options} [options] Options.\n   */\n  constructor(options) {\n    super();\n\n    options = options ? options : {};\n\n    /**\n     * @type {import(\"../proj/Projection.js\").default}\n     */\n    this.dataProjection = getProjection('EPSG:4326');\n\n    /**\n     * @private\n     * @type {IGCZ}\n     */\n    this.altitudeMode_ = options.altitudeMode ? options.altitudeMode : 'none';\n  }\n\n  /**\n   * @protected\n   * @param {string} text Text.\n   * @param {import(\"./Feature.js\").ReadOptions} [options] Read options.\n   * @return {import(\"../Feature.js\").default} Feature.\n   */\n  readFeatureFromText(text, options) {\n    const altitudeMode = this.altitudeMode_;\n    const lines = text.split(NEWLINE_RE);\n    /** @type {Object<string, string>} */\n    const properties = {};\n    const flatCoordinates = [];\n    let year = 2000;\n    let month = 0;\n    let day = 1;\n    let lastDateTime = -1;\n    let i, ii;\n    for (i = 0, ii = lines.length; i < ii; ++i) {\n      const line = lines[i];\n      let m;\n      if (line.charAt(0) == 'B') {\n        m = B_RECORD_RE.exec(line);\n        if (m) {\n          const hour = parseInt(m[1], 10);\n          const minute = parseInt(m[2], 10);\n          const second = parseInt(m[3], 10);\n          let y = parseInt(m[4], 10) + parseInt(m[5], 10) / 60000;\n          if (m[6] == 'S') {\n            y = -y;\n          }\n          let x = parseInt(m[7], 10) + parseInt(m[8], 10) / 60000;\n          if (m[9] == 'W') {\n            x = -x;\n          }\n          flatCoordinates.push(x, y);\n          if (altitudeMode != 'none') {\n            let z;\n            if (altitudeMode == 'gps') {\n              z = parseInt(m[11], 10);\n            } else if (altitudeMode == 'barometric') {\n              z = parseInt(m[12], 10);\n            } else {\n              z = 0;\n            }\n            flatCoordinates.push(z);\n          }\n          let dateTime = Date.UTC(year, month, day, hour, minute, second);\n          // Detect UTC midnight wrap around.\n          if (dateTime < lastDateTime) {\n            dateTime = Date.UTC(year, month, day + 1, hour, minute, second);\n          }\n          flatCoordinates.push(dateTime / 1000);\n          lastDateTime = dateTime;\n        }\n      } else if (line.charAt(0) == 'H') {\n        m = HFDTE_RECORD_RE.exec(line);\n        if (m) {\n          day = parseInt(m[1], 10);\n          month = parseInt(m[2], 10) - 1;\n          year = 2000 + parseInt(m[3], 10);\n        } else {\n          m = H_RECORD_RE.exec(line);\n          if (m) {\n            properties[m[1]] = m[2].trim();\n          }\n        }\n      }\n    }\n    if (flatCoordinates.length === 0) {\n      return null;\n    }\n    const layout = altitudeMode == 'none' ? 'XYM' : 'XYZM';\n    const lineString = new LineString(flatCoordinates, layout);\n    const feature = new Feature(\n      transformGeometryWithOptions(lineString, false, options)\n    );\n    feature.setProperties(properties, true);\n    return feature;\n  }\n\n  /**\n   * @param {string} text Text.\n   * @param {import(\"./Feature.js\").ReadOptions} [options] Read options.\n   * @protected\n   * @return {Array<Feature>} Features.\n   */\n  readFeaturesFromText(text, options) {\n    const feature = this.readFeatureFromText(text, options);\n    if (feature) {\n      return [feature];\n    }\n    return [];\n  }\n}\n\nexport default IGC;\n","/**\n * @module ol/format/KML\n */\nimport Feature from '../Feature.js';\nimport Fill from '../style/Fill.js';\nimport GeometryCollection from '../geom/GeometryCollection.js';\nimport Icon from '../style/Icon.js';\nimport ImageState from '../ImageState.js';\nimport LineString from '../geom/LineString.js';\nimport MultiLineString from '../geom/MultiLineString.js';\nimport MultiPoint from '../geom/MultiPoint.js';\nimport MultiPolygon from '../geom/MultiPolygon.js';\nimport Point from '../geom/Point.js';\nimport Polygon from '../geom/Polygon.js';\nimport Stroke from '../style/Stroke.js';\nimport Style from '../style/Style.js';\nimport Text from '../style/Text.js';\nimport XMLFeature from './XMLFeature.js';\nimport {\n  OBJECT_PROPERTY_NODE_FACTORY,\n  XML_SCHEMA_INSTANCE_URI,\n  createElementNS,\n  getAllTextContent,\n  isDocument,\n  makeArrayExtender,\n  makeArrayPusher,\n  makeChildAppender,\n  makeObjectPropertySetter,\n  makeReplacer,\n  makeSequence,\n  makeSimpleNodeFactory,\n  makeStructureNS,\n  parse,\n  parseNode,\n  pushParseAndPop,\n  pushSerializeAndPop,\n} from '../xml.js';\nimport {asArray} from '../color.js';\nimport {assert} from '../asserts.js';\nimport {extend} from '../array.js';\nimport {get as getProjection} from '../proj.js';\nimport {\n  readBoolean,\n  readDecimal,\n  readString,\n  writeBooleanTextNode,\n  writeCDATASection,\n  writeDecimalTextNode,\n  writeStringTextNode,\n} from './xsd.js';\nimport {toRadians} from '../math.js';\nimport {transformGeometryWithOptions} from './Feature.js';\n\n/**\n * @typedef {Object} Vec2\n * @property {number} x X coordinate.\n * @property {import(\"../style/Icon.js\").IconAnchorUnits} xunits Units of x.\n * @property {number} y Y coordinate.\n * @property {import(\"../style/Icon.js\").IconAnchorUnits} yunits Units of Y.\n * @property {import(\"../style/Icon.js\").IconOrigin} [origin] Origin.\n */\n\n/**\n * @typedef {Object} GxTrackObject\n * @property {Array<Array<number>>} coordinates Coordinates.\n * @property {Array<number>} whens Whens.\n */\n\n/**\n * @const\n * @type {Array<string>}\n */\nconst GX_NAMESPACE_URIS = ['http://www.google.com/kml/ext/2.2'];\n\n/**\n * @const\n * @type {Array<null|string>}\n */\nconst NAMESPACE_URIS = [\n  null,\n  'http://earth.google.com/kml/2.0',\n  'http://earth.google.com/kml/2.1',\n  'http://earth.google.com/kml/2.2',\n  'http://www.opengis.net/kml/2.2',\n];\n\n/**\n * @const\n * @type {string}\n */\nconst SCHEMA_LOCATION =\n  'http://www.opengis.net/kml/2.2 ' +\n  'https://developers.google.com/kml/schema/kml22gx.xsd';\n\n/**\n * @type {Object<string, import(\"../style/Icon.js\").IconAnchorUnits>}\n */\nconst ICON_ANCHOR_UNITS_MAP = {\n  'fraction': 'fraction',\n  'pixels': 'pixels',\n  'insetPixels': 'pixels',\n};\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst PLACEMARK_PARSERS = makeStructureNS(\n  NAMESPACE_URIS,\n  {\n    'ExtendedData': extendedDataParser,\n    'Region': regionParser,\n    'MultiGeometry': makeObjectPropertySetter(readMultiGeometry, 'geometry'),\n    'LineString': makeObjectPropertySetter(readLineString, 'geometry'),\n    'LinearRing': makeObjectPropertySetter(readLinearRing, 'geometry'),\n    'Point': makeObjectPropertySetter(readPoint, 'geometry'),\n    'Polygon': makeObjectPropertySetter(readPolygon, 'geometry'),\n    'Style': makeObjectPropertySetter(readStyle),\n    'StyleMap': placemarkStyleMapParser,\n    'address': makeObjectPropertySetter(readString),\n    'description': makeObjectPropertySetter(readString),\n    'name': makeObjectPropertySetter(readString),\n    'open': makeObjectPropertySetter(readBoolean),\n    'phoneNumber': makeObjectPropertySetter(readString),\n    'styleUrl': makeObjectPropertySetter(readStyleURL),\n    'visibility': makeObjectPropertySetter(readBoolean),\n  },\n  makeStructureNS(GX_NAMESPACE_URIS, {\n    'MultiTrack': makeObjectPropertySetter(readGxMultiTrack, 'geometry'),\n    'Track': makeObjectPropertySetter(readGxTrack, 'geometry'),\n  })\n);\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst NETWORK_LINK_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'ExtendedData': extendedDataParser,\n  'Region': regionParser,\n  'Link': linkParser,\n  'address': makeObjectPropertySetter(readString),\n  'description': makeObjectPropertySetter(readString),\n  'name': makeObjectPropertySetter(readString),\n  'open': makeObjectPropertySetter(readBoolean),\n  'phoneNumber': makeObjectPropertySetter(readString),\n  'visibility': makeObjectPropertySetter(readBoolean),\n});\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst LINK_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'href': makeObjectPropertySetter(readURI),\n});\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst CAMERA_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  Altitude: makeObjectPropertySetter(readDecimal),\n  Longitude: makeObjectPropertySetter(readDecimal),\n  Latitude: makeObjectPropertySetter(readDecimal),\n  Tilt: makeObjectPropertySetter(readDecimal),\n  AltitudeMode: makeObjectPropertySetter(readString),\n  Heading: makeObjectPropertySetter(readDecimal),\n  Roll: makeObjectPropertySetter(readDecimal),\n});\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst REGION_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'LatLonAltBox': latLonAltBoxParser,\n  'Lod': lodParser,\n});\n\n/**\n * @const\n * @type {Object<string, Array<string>>}\n */\n// @ts-ignore\nconst KML_SEQUENCE = makeStructureNS(NAMESPACE_URIS, ['Document', 'Placemark']);\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Serializer>>}\n */\n// @ts-ignore\nconst KML_SERIALIZERS = makeStructureNS(NAMESPACE_URIS, {\n  'Document': makeChildAppender(writeDocument),\n  'Placemark': makeChildAppender(writePlacemark),\n});\n\n/**\n * @type {import(\"../color.js\").Color}\n */\nlet DEFAULT_COLOR;\n\n/**\n * @type {Fill|null}\n */\nlet DEFAULT_FILL_STYLE = null;\n\n/**\n * Get the default fill style (or null if not yet set).\n * @return {Fill|null} The default fill style.\n */\nexport function getDefaultFillStyle() {\n  return DEFAULT_FILL_STYLE;\n}\n\n/**\n * @type {import(\"../size.js\").Size}\n */\nlet DEFAULT_IMAGE_STYLE_ANCHOR;\n\n/**\n * @type {import(\"../style/Icon.js\").IconAnchorUnits}\n */\nlet DEFAULT_IMAGE_STYLE_ANCHOR_X_UNITS;\n\n/**\n * @type {import(\"../style/Icon.js\").IconAnchorUnits}\n */\nlet DEFAULT_IMAGE_STYLE_ANCHOR_Y_UNITS;\n\n/**\n * @type {import(\"../size.js\").Size}\n */\nlet DEFAULT_IMAGE_STYLE_SIZE;\n\n/**\n * @type {string}\n */\nlet DEFAULT_IMAGE_STYLE_SRC;\n\n/**\n * @type {import(\"../style/Image.js\").default|null}\n */\nlet DEFAULT_IMAGE_STYLE = null;\n\n/**\n * Get the default image style (or null if not yet set).\n * @return {import(\"../style/Image.js\").default|null} The default image style.\n */\nexport function getDefaultImageStyle() {\n  return DEFAULT_IMAGE_STYLE;\n}\n\n/**\n * @type {string}\n */\nlet DEFAULT_NO_IMAGE_STYLE;\n\n/**\n * @type {Stroke|null}\n */\nlet DEFAULT_STROKE_STYLE = null;\n\n/**\n * Get the default stroke style (or null if not yet set).\n * @return {Stroke|null} The default stroke style.\n */\nexport function getDefaultStrokeStyle() {\n  return DEFAULT_STROKE_STYLE;\n}\n\n/**\n * @type {Stroke}\n */\nlet DEFAULT_TEXT_STROKE_STYLE;\n\n/**\n * @type {Text|null}\n */\nlet DEFAULT_TEXT_STYLE = null;\n\n/**\n * Get the default text style (or null if not yet set).\n * @return {Text|null} The default text style.\n */\nexport function getDefaultTextStyle() {\n  return DEFAULT_TEXT_STYLE;\n}\n\n/**\n * @type {Style|null}\n */\nlet DEFAULT_STYLE = null;\n\n/**\n * Get the default style (or null if not yet set).\n * @return {Style|null} The default style.\n */\nexport function getDefaultStyle() {\n  return DEFAULT_STYLE;\n}\n\n/**\n * @type {Array<Style>|null}\n */\nlet DEFAULT_STYLE_ARRAY = null;\n\n/**\n * Get the default style array (or null if not yet set).\n * @return {Array<Style>|null} The default style.\n */\nexport function getDefaultStyleArray() {\n  return DEFAULT_STYLE_ARRAY;\n}\n\n/**\n * Function that returns the scale needed to normalize an icon image to 32 pixels.\n * @param {import(\"../size.js\").Size} size Image size.\n * @return {number} Scale.\n */\nfunction scaleForSize(size) {\n  return 32 / Math.min(size[0], size[1]);\n}\n\nfunction createStyleDefaults() {\n  DEFAULT_COLOR = [255, 255, 255, 1];\n\n  DEFAULT_FILL_STYLE = new Fill({\n    color: DEFAULT_COLOR,\n  });\n\n  DEFAULT_IMAGE_STYLE_ANCHOR = [20, 2];\n\n  DEFAULT_IMAGE_STYLE_ANCHOR_X_UNITS = 'pixels';\n\n  DEFAULT_IMAGE_STYLE_ANCHOR_Y_UNITS = 'pixels';\n\n  DEFAULT_IMAGE_STYLE_SIZE = [64, 64];\n\n  DEFAULT_IMAGE_STYLE_SRC =\n    'https://maps.google.com/mapfiles/kml/pushpin/ylw-pushpin.png';\n\n  DEFAULT_IMAGE_STYLE = new Icon({\n    anchor: DEFAULT_IMAGE_STYLE_ANCHOR,\n    anchorOrigin: 'bottom-left',\n    anchorXUnits: DEFAULT_IMAGE_STYLE_ANCHOR_X_UNITS,\n    anchorYUnits: DEFAULT_IMAGE_STYLE_ANCHOR_Y_UNITS,\n    crossOrigin: 'anonymous',\n    rotation: 0,\n    scale: scaleForSize(DEFAULT_IMAGE_STYLE_SIZE),\n    size: DEFAULT_IMAGE_STYLE_SIZE,\n    src: DEFAULT_IMAGE_STYLE_SRC,\n  });\n\n  DEFAULT_NO_IMAGE_STYLE = 'NO_IMAGE';\n\n  DEFAULT_STROKE_STYLE = new Stroke({\n    color: DEFAULT_COLOR,\n    width: 1,\n  });\n\n  DEFAULT_TEXT_STROKE_STYLE = new Stroke({\n    color: [51, 51, 51, 1],\n    width: 2,\n  });\n\n  DEFAULT_TEXT_STYLE = new Text({\n    font: 'bold 16px Helvetica',\n    fill: DEFAULT_FILL_STYLE,\n    stroke: DEFAULT_TEXT_STROKE_STYLE,\n    scale: 0.8,\n  });\n\n  DEFAULT_STYLE = new Style({\n    fill: DEFAULT_FILL_STYLE,\n    image: DEFAULT_IMAGE_STYLE,\n    text: DEFAULT_TEXT_STYLE,\n    stroke: DEFAULT_STROKE_STYLE,\n    zIndex: 0,\n  });\n\n  DEFAULT_STYLE_ARRAY = [DEFAULT_STYLE];\n}\n\n/**\n * @type {HTMLTextAreaElement}\n */\nlet TEXTAREA;\n\n/**\n * A function that takes a url `{string}` and returns a url `{string}`.\n * Might be used to change an icon path or to substitute a\n * data url obtained from a KMZ array buffer.\n *\n * @typedef {function(string):string} IconUrlFunction\n * @api\n */\n\n/**\n * Function that returns a url unchanged.\n * @param {string} href Input url.\n * @return {string} Output url.\n */\nfunction defaultIconUrlFunction(href) {\n  return href;\n}\n\n/**\n * @typedef {Object} Options\n * @property {boolean} [extractStyles=true] Extract styles from the KML.\n * @property {boolean} [showPointNames=true] Show names as labels for placemarks which contain points.\n * @property {Array<Style>} [defaultStyle] Default style. The\n * default default style is the same as Google Earth.\n * @property {boolean} [writeStyles=true] Write styles into KML.\n * @property {null|string} [crossOrigin='anonymous'] The `crossOrigin` attribute for loaded images. Note that you must provide a\n * `crossOrigin` value if you want to access pixel data with the Canvas renderer.\n * @property {IconUrlFunction} [iconUrlFunction] Function that takes a url string and returns a url string.\n * Might be used to change an icon path or to substitute a data url obtained from a KMZ array buffer.\n */\n\n/**\n * @classdesc\n * Feature format for reading and writing data in the KML format.\n *\n * {@link module:ol/format/KML~KML#readFeature} will read the first feature from\n * a KML source.\n *\n * MultiGeometries are converted into GeometryCollections if they are a mix of\n * geometry types, and into MultiPoint/MultiLineString/MultiPolygon if they are\n * all of the same type.\n *\n * @api\n */\nclass KML extends XMLFeature {\n  /**\n   * @param {Options} [options] Options.\n   */\n  constructor(options) {\n    super();\n\n    options = options ? options : {};\n\n    if (!DEFAULT_STYLE_ARRAY) {\n      createStyleDefaults();\n    }\n\n    /**\n     * @type {import(\"../proj/Projection.js\").default}\n     */\n    this.dataProjection = getProjection('EPSG:4326');\n\n    /**\n     * @private\n     * @type {Array<Style>}\n     */\n    this.defaultStyle_ = options.defaultStyle\n      ? options.defaultStyle\n      : DEFAULT_STYLE_ARRAY;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.extractStyles_ =\n      options.extractStyles !== undefined ? options.extractStyles : true;\n\n    /**\n     * @type {boolean}\n     */\n    this.writeStyles_ =\n      options.writeStyles !== undefined ? options.writeStyles : true;\n\n    /**\n     * @private\n     * @type {!Object<string, (Array<Style>|string)>}\n     */\n    this.sharedStyles_ = {};\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.showPointNames_ =\n      options.showPointNames !== undefined ? options.showPointNames : true;\n\n    /**\n     * @type {null|string}\n     */\n    this.crossOrigin_ =\n      options.crossOrigin !== undefined ? options.crossOrigin : 'anonymous';\n\n    /**\n     * @type {IconUrlFunction}\n     */\n    this.iconUrlFunction_ = options.iconUrlFunction\n      ? options.iconUrlFunction\n      : defaultIconUrlFunction;\n\n    this.supportedMediaTypes = ['application/vnd.google-earth.kml+xml'];\n  }\n\n  /**\n   * @param {Node} node Node.\n   * @param {Array<*>} objectStack Object stack.\n   * @private\n   * @return {Array<Feature>|undefined} Features.\n   */\n  readDocumentOrFolder_(node, objectStack) {\n    // FIXME use scope somehow\n    const parsersNS = makeStructureNS(NAMESPACE_URIS, {\n      'Document': makeArrayExtender(this.readDocumentOrFolder_, this),\n      'Folder': makeArrayExtender(this.readDocumentOrFolder_, this),\n      'Placemark': makeArrayPusher(this.readPlacemark_, this),\n      'Style': this.readSharedStyle_.bind(this),\n      'StyleMap': this.readSharedStyleMap_.bind(this),\n    });\n    /** @type {Array<Feature>} */\n    // @ts-ignore\n    const features = pushParseAndPop([], parsersNS, node, objectStack, this);\n    if (features) {\n      return features;\n    }\n    return undefined;\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {Array<*>} objectStack Object stack.\n   * @private\n   * @return {Feature|undefined} Feature.\n   */\n  readPlacemark_(node, objectStack) {\n    const object = pushParseAndPop(\n      {'geometry': null},\n      PLACEMARK_PARSERS,\n      node,\n      objectStack,\n      this\n    );\n    if (!object) {\n      return undefined;\n    }\n    const feature = new Feature();\n    const id = node.getAttribute('id');\n    if (id !== null) {\n      feature.setId(id);\n    }\n    const options = /** @type {import(\"./Feature.js\").ReadOptions} */ (\n      objectStack[0]\n    );\n\n    const geometry = object['geometry'];\n    if (geometry) {\n      transformGeometryWithOptions(geometry, false, options);\n    }\n    feature.setGeometry(geometry);\n    delete object['geometry'];\n\n    if (this.extractStyles_) {\n      const style = object['Style'];\n      const styleUrl = object['styleUrl'];\n      const styleFunction = createFeatureStyleFunction(\n        style,\n        styleUrl,\n        this.defaultStyle_,\n        this.sharedStyles_,\n        this.showPointNames_\n      );\n      feature.setStyle(styleFunction);\n    }\n    delete object['Style'];\n    // we do not remove the styleUrl property from the object, so it\n    // gets stored on feature when setProperties is called\n\n    feature.setProperties(object, true);\n\n    return feature;\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {Array<*>} objectStack Object stack.\n   * @private\n   */\n  readSharedStyle_(node, objectStack) {\n    const id = node.getAttribute('id');\n    if (id !== null) {\n      const style = readStyle.call(this, node, objectStack);\n      if (style) {\n        let styleUri;\n        let baseURI = node.baseURI;\n        if (!baseURI || baseURI == 'about:blank') {\n          baseURI = window.location.href;\n        }\n        if (baseURI) {\n          const url = new URL('#' + id, baseURI);\n          styleUri = url.href;\n        } else {\n          styleUri = '#' + id;\n        }\n        this.sharedStyles_[styleUri] = style;\n      }\n    }\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {Array<*>} objectStack Object stack.\n   * @private\n   */\n  readSharedStyleMap_(node, objectStack) {\n    const id = node.getAttribute('id');\n    if (id === null) {\n      return;\n    }\n    const styleMapValue = readStyleMapValue.call(this, node, objectStack);\n    if (!styleMapValue) {\n      return;\n    }\n    let styleUri;\n    let baseURI = node.baseURI;\n    if (!baseURI || baseURI == 'about:blank') {\n      baseURI = window.location.href;\n    }\n    if (baseURI) {\n      const url = new URL('#' + id, baseURI);\n      styleUri = url.href;\n    } else {\n      styleUri = '#' + id;\n    }\n    this.sharedStyles_[styleUri] = styleMapValue;\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {import(\"./Feature.js\").ReadOptions} [options] Options.\n   * @return {import(\"../Feature.js\").default} Feature.\n   */\n  readFeatureFromNode(node, options) {\n    if (!NAMESPACE_URIS.includes(node.namespaceURI)) {\n      return null;\n    }\n    const feature = this.readPlacemark_(node, [\n      this.getReadOptions(node, options),\n    ]);\n    if (feature) {\n      return feature;\n    }\n    return null;\n  }\n\n  /**\n   * @protected\n   * @param {Element} node Node.\n   * @param {import(\"./Feature.js\").ReadOptions} [options] Options.\n   * @return {Array<import(\"../Feature.js\").default>} Features.\n   */\n  readFeaturesFromNode(node, options) {\n    if (!NAMESPACE_URIS.includes(node.namespaceURI)) {\n      return [];\n    }\n    let features;\n    const localName = node.localName;\n    if (localName == 'Document' || localName == 'Folder') {\n      features = this.readDocumentOrFolder_(node, [\n        this.getReadOptions(node, options),\n      ]);\n      if (features) {\n        return features;\n      }\n      return [];\n    }\n    if (localName == 'Placemark') {\n      const feature = this.readPlacemark_(node, [\n        this.getReadOptions(node, options),\n      ]);\n      if (feature) {\n        return [feature];\n      }\n      return [];\n    }\n    if (localName == 'kml') {\n      features = [];\n      for (let n = node.firstElementChild; n; n = n.nextElementSibling) {\n        const fs = this.readFeaturesFromNode(n, options);\n        if (fs) {\n          extend(features, fs);\n        }\n      }\n      return features;\n    }\n    return [];\n  }\n\n  /**\n   * Read the name of the KML.\n   *\n   * @param {Document|Element|string} source Source.\n   * @return {string|undefined} Name.\n   * @api\n   */\n  readName(source) {\n    if (!source) {\n      return undefined;\n    }\n    if (typeof source === 'string') {\n      const doc = parse(source);\n      return this.readNameFromDocument(doc);\n    }\n    if (isDocument(source)) {\n      return this.readNameFromDocument(/** @type {Document} */ (source));\n    }\n    return this.readNameFromNode(/** @type {Element} */ (source));\n  }\n\n  /**\n   * @param {Document} doc Document.\n   * @return {string|undefined} Name.\n   */\n  readNameFromDocument(doc) {\n    for (let n = /** @type {Node} */ (doc.firstChild); n; n = n.nextSibling) {\n      if (n.nodeType == Node.ELEMENT_NODE) {\n        const name = this.readNameFromNode(/** @type {Element} */ (n));\n        if (name) {\n          return name;\n        }\n      }\n    }\n    return undefined;\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @return {string|undefined} Name.\n   */\n  readNameFromNode(node) {\n    for (let n = node.firstElementChild; n; n = n.nextElementSibling) {\n      if (NAMESPACE_URIS.includes(n.namespaceURI) && n.localName == 'name') {\n        return readString(n);\n      }\n    }\n    for (let n = node.firstElementChild; n; n = n.nextElementSibling) {\n      const localName = n.localName;\n      if (\n        NAMESPACE_URIS.includes(n.namespaceURI) &&\n        (localName == 'Document' ||\n          localName == 'Folder' ||\n          localName == 'Placemark' ||\n          localName == 'kml')\n      ) {\n        const name = this.readNameFromNode(n);\n        if (name) {\n          return name;\n        }\n      }\n    }\n    return undefined;\n  }\n\n  /**\n   * Read the network links of the KML.\n   *\n   * @param {Document|Element|string} source Source.\n   * @return {Array<Object>} Network links.\n   * @api\n   */\n  readNetworkLinks(source) {\n    const networkLinks = [];\n    if (typeof source === 'string') {\n      const doc = parse(source);\n      extend(networkLinks, this.readNetworkLinksFromDocument(doc));\n    } else if (isDocument(source)) {\n      extend(\n        networkLinks,\n        this.readNetworkLinksFromDocument(/** @type {Document} */ (source))\n      );\n    } else {\n      extend(\n        networkLinks,\n        this.readNetworkLinksFromNode(/** @type {Element} */ (source))\n      );\n    }\n    return networkLinks;\n  }\n\n  /**\n   * @param {Document} doc Document.\n   * @return {Array<Object>} Network links.\n   */\n  readNetworkLinksFromDocument(doc) {\n    const networkLinks = [];\n    for (let n = /** @type {Node} */ (doc.firstChild); n; n = n.nextSibling) {\n      if (n.nodeType == Node.ELEMENT_NODE) {\n        extend(\n          networkLinks,\n          this.readNetworkLinksFromNode(/** @type {Element} */ (n))\n        );\n      }\n    }\n    return networkLinks;\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @return {Array<Object>} Network links.\n   */\n  readNetworkLinksFromNode(node) {\n    const networkLinks = [];\n    for (let n = node.firstElementChild; n; n = n.nextElementSibling) {\n      if (\n        NAMESPACE_URIS.includes(n.namespaceURI) &&\n        n.localName == 'NetworkLink'\n      ) {\n        const obj = pushParseAndPop({}, NETWORK_LINK_PARSERS, n, []);\n        networkLinks.push(obj);\n      }\n    }\n    for (let n = node.firstElementChild; n; n = n.nextElementSibling) {\n      const localName = n.localName;\n      if (\n        NAMESPACE_URIS.includes(n.namespaceURI) &&\n        (localName == 'Document' || localName == 'Folder' || localName == 'kml')\n      ) {\n        extend(networkLinks, this.readNetworkLinksFromNode(n));\n      }\n    }\n    return networkLinks;\n  }\n\n  /**\n   * Read the regions of the KML.\n   *\n   * @param {Document|Element|string} source Source.\n   * @return {Array<Object>} Regions.\n   * @api\n   */\n  readRegion(source) {\n    const regions = [];\n    if (typeof source === 'string') {\n      const doc = parse(source);\n      extend(regions, this.readRegionFromDocument(doc));\n    } else if (isDocument(source)) {\n      extend(\n        regions,\n        this.readRegionFromDocument(/** @type {Document} */ (source))\n      );\n    } else {\n      extend(regions, this.readRegionFromNode(/** @type {Element} */ (source)));\n    }\n    return regions;\n  }\n\n  /**\n   * @param {Document} doc Document.\n   * @return {Array<Object>} Region.\n   */\n  readRegionFromDocument(doc) {\n    const regions = [];\n    for (let n = /** @type {Node} */ (doc.firstChild); n; n = n.nextSibling) {\n      if (n.nodeType == Node.ELEMENT_NODE) {\n        extend(regions, this.readRegionFromNode(/** @type {Element} */ (n)));\n      }\n    }\n    return regions;\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @return {Array<Object>} Region.\n   * @api\n   */\n  readRegionFromNode(node) {\n    const regions = [];\n    for (let n = node.firstElementChild; n; n = n.nextElementSibling) {\n      if (NAMESPACE_URIS.includes(n.namespaceURI) && n.localName == 'Region') {\n        const obj = pushParseAndPop({}, REGION_PARSERS, n, []);\n        regions.push(obj);\n      }\n    }\n    for (let n = node.firstElementChild; n; n = n.nextElementSibling) {\n      const localName = n.localName;\n      if (\n        NAMESPACE_URIS.includes(n.namespaceURI) &&\n        (localName == 'Document' || localName == 'Folder' || localName == 'kml')\n      ) {\n        extend(regions, this.readRegionFromNode(n));\n      }\n    }\n    return regions;\n  }\n\n  /**\n   * @typedef {Object} KMLCamera Specifies the observer's viewpoint and associated view parameters.\n   * @property {number} [Latitude] Latitude of the camera.\n   * @property {number} [Longitude] Longitude of the camera.\n   * @property {number} [Altitude] Altitude of the camera.\n   * @property {string} [AltitudeMode] Floor-related altitude mode.\n   * @property {number} [Heading] Horizontal camera rotation.\n   * @property {number} [Tilt] Lateral camera rotation.\n   * @property {number} [Roll] Vertical camera rotation.\n   */\n\n  /**\n   * Read the cameras of the KML.\n   *\n   * @param {Document|Element|string} source Source.\n   * @return {Array<KMLCamera>} Cameras.\n   * @api\n   */\n  readCamera(source) {\n    const cameras = [];\n    if (typeof source === 'string') {\n      const doc = parse(source);\n      extend(cameras, this.readCameraFromDocument(doc));\n    } else if (isDocument(source)) {\n      extend(\n        cameras,\n        this.readCameraFromDocument(/** @type {Document} */ (source))\n      );\n    } else {\n      extend(cameras, this.readCameraFromNode(/** @type {Element} */ (source)));\n    }\n    return cameras;\n  }\n\n  /**\n   * @param {Document} doc Document.\n   * @return {Array<KMLCamera>} Cameras.\n   */\n  readCameraFromDocument(doc) {\n    const cameras = [];\n    for (let n = /** @type {Node} */ (doc.firstChild); n; n = n.nextSibling) {\n      if (n.nodeType === Node.ELEMENT_NODE) {\n        extend(cameras, this.readCameraFromNode(/** @type {Element} */ (n)));\n      }\n    }\n    return cameras;\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @return {Array<KMLCamera>} Cameras.\n   * @api\n   */\n  readCameraFromNode(node) {\n    const cameras = [];\n    for (let n = node.firstElementChild; n; n = n.nextElementSibling) {\n      if (NAMESPACE_URIS.includes(n.namespaceURI) && n.localName === 'Camera') {\n        const obj = pushParseAndPop({}, CAMERA_PARSERS, n, []);\n        cameras.push(obj);\n      }\n    }\n    for (let n = node.firstElementChild; n; n = n.nextElementSibling) {\n      const localName = n.localName;\n      if (\n        NAMESPACE_URIS.includes(n.namespaceURI) &&\n        (localName === 'Document' ||\n          localName === 'Folder' ||\n          localName === 'Placemark' ||\n          localName === 'kml')\n      ) {\n        extend(cameras, this.readCameraFromNode(n));\n      }\n    }\n    return cameras;\n  }\n\n  /**\n   * Encode an array of features in the KML format as an XML node. GeometryCollections,\n   * MultiPoints, MultiLineStrings, and MultiPolygons are output as MultiGeometries.\n   *\n   * @param {Array<Feature>} features Features.\n   * @param {import(\"./Feature.js\").WriteOptions} [options] Options.\n   * @return {Node} Node.\n   * @api\n   */\n  writeFeaturesNode(features, options) {\n    options = this.adaptOptions(options);\n    const kml = createElementNS(NAMESPACE_URIS[4], 'kml');\n    const xmlnsUri = 'http://www.w3.org/2000/xmlns/';\n    kml.setAttributeNS(xmlnsUri, 'xmlns:gx', GX_NAMESPACE_URIS[0]);\n    kml.setAttributeNS(xmlnsUri, 'xmlns:xsi', XML_SCHEMA_INSTANCE_URI);\n    kml.setAttributeNS(\n      XML_SCHEMA_INSTANCE_URI,\n      'xsi:schemaLocation',\n      SCHEMA_LOCATION\n    );\n\n    const /** @type {import(\"../xml.js\").NodeStackItem} */ context = {\n        node: kml,\n      };\n    /** @type {!Object<string, (Array<Feature>|Feature|undefined)>} */\n    const properties = {};\n    if (features.length > 1) {\n      properties['Document'] = features;\n    } else if (features.length == 1) {\n      properties['Placemark'] = features[0];\n    }\n    const orderedKeys = KML_SEQUENCE[kml.namespaceURI];\n    const values = makeSequence(properties, orderedKeys);\n    pushSerializeAndPop(\n      context,\n      KML_SERIALIZERS,\n      OBJECT_PROPERTY_NODE_FACTORY,\n      values,\n      [options],\n      orderedKeys,\n      this\n    );\n    return kml;\n  }\n}\n\n/**\n * @param {Style|undefined} foundStyle Style.\n * @param {string} name Name.\n * @return {Style} style Style.\n */\nfunction createNameStyleFunction(foundStyle, name) {\n  const textOffset = [0, 0];\n  /** @type {CanvasTextAlign} */\n  let textAlign = 'start';\n  const imageStyle = foundStyle.getImage();\n  if (imageStyle) {\n    const imageSize = imageStyle.getSize();\n    if (imageSize && imageSize.length == 2) {\n      const imageScale = imageStyle.getScaleArray();\n      const anchor = imageStyle.getAnchor();\n      // Offset the label to be centered to the right of the icon,\n      // if there is one.\n      textOffset[0] = imageScale[0] * (imageSize[0] - anchor[0]);\n      textOffset[1] = imageScale[1] * (imageSize[1] / 2 - anchor[1]);\n      textAlign = 'left';\n    }\n  }\n  let textStyle = foundStyle.getText();\n  if (textStyle) {\n    // clone the text style, customizing it with name, alignments and offset.\n    // Note that kml does not support many text options that OpenLayers does (rotation, textBaseline).\n    textStyle = textStyle.clone();\n    textStyle.setFont(textStyle.getFont() || DEFAULT_TEXT_STYLE.getFont());\n    textStyle.setScale(textStyle.getScale() || DEFAULT_TEXT_STYLE.getScale());\n    textStyle.setFill(textStyle.getFill() || DEFAULT_TEXT_STYLE.getFill());\n    textStyle.setStroke(textStyle.getStroke() || DEFAULT_TEXT_STROKE_STYLE);\n  } else {\n    textStyle = DEFAULT_TEXT_STYLE.clone();\n  }\n  textStyle.setText(name);\n  textStyle.setOffsetX(textOffset[0]);\n  textStyle.setOffsetY(textOffset[1]);\n  textStyle.setTextAlign(textAlign);\n\n  const nameStyle = new Style({\n    image: imageStyle,\n    text: textStyle,\n  });\n  return nameStyle;\n}\n\n/**\n * @param {Array<Style>|undefined} style Style.\n * @param {string} styleUrl Style URL.\n * @param {Array<Style>} defaultStyle Default style.\n * @param {!Object<string, (Array<Style>|string)>} sharedStyles Shared styles.\n * @param {boolean|undefined} showPointNames true to show names for point placemarks.\n * @return {import(\"../style/Style.js\").StyleFunction} Feature style function.\n */\nfunction createFeatureStyleFunction(\n  style,\n  styleUrl,\n  defaultStyle,\n  sharedStyles,\n  showPointNames\n) {\n  return (\n    /**\n     * @param {Feature} feature feature.\n     * @param {number} resolution Resolution.\n     * @return {Array<Style>|Style} Style.\n     */\n    function (feature, resolution) {\n      let drawName = showPointNames;\n      let name = '';\n      let multiGeometryPoints = [];\n      if (drawName) {\n        const geometry = feature.getGeometry();\n        if (geometry) {\n          if (geometry instanceof GeometryCollection) {\n            multiGeometryPoints = geometry\n              .getGeometriesArrayRecursive()\n              .filter(function (geometry) {\n                const type = geometry.getType();\n                return type === 'Point' || type === 'MultiPoint';\n              });\n            drawName = multiGeometryPoints.length > 0;\n          } else {\n            const type = geometry.getType();\n            drawName = type === 'Point' || type === 'MultiPoint';\n          }\n        }\n      }\n\n      if (drawName) {\n        name = /** @type {string} */ (feature.get('name'));\n        drawName = drawName && !!name;\n        // convert any html character codes\n        if (drawName && /&[^&]+;/.test(name)) {\n          if (!TEXTAREA) {\n            TEXTAREA = document.createElement('textarea');\n          }\n          TEXTAREA.innerHTML = name;\n          name = TEXTAREA.value;\n        }\n      }\n\n      let featureStyle = defaultStyle;\n      if (style) {\n        featureStyle = style;\n      } else if (styleUrl) {\n        featureStyle = findStyle(styleUrl, defaultStyle, sharedStyles);\n      }\n      if (drawName) {\n        const nameStyle = createNameStyleFunction(featureStyle[0], name);\n        if (multiGeometryPoints.length > 0) {\n          // in multigeometries restrict the name style to points and create a\n          // style without image or text for geometries requiring fill or stroke\n          // including any polygon specific style if there is one\n          nameStyle.setGeometry(new GeometryCollection(multiGeometryPoints));\n          const baseStyle = new Style({\n            geometry: featureStyle[0].getGeometry(),\n            image: null,\n            fill: featureStyle[0].getFill(),\n            stroke: featureStyle[0].getStroke(),\n            text: null,\n          });\n          return [nameStyle, baseStyle].concat(featureStyle.slice(1));\n        }\n        return nameStyle;\n      }\n      return featureStyle;\n    }\n  );\n}\n\n/**\n * @param {Array<Style>|string|undefined} styleValue Style value.\n * @param {Array<Style>} defaultStyle Default style.\n * @param {!Object<string, (Array<Style>|string)>} sharedStyles\n * Shared styles.\n * @return {Array<Style>} Style.\n */\nfunction findStyle(styleValue, defaultStyle, sharedStyles) {\n  if (Array.isArray(styleValue)) {\n    return styleValue;\n  }\n  if (typeof styleValue === 'string') {\n    return findStyle(sharedStyles[styleValue], defaultStyle, sharedStyles);\n  }\n  return defaultStyle;\n}\n\n/**\n * @param {Node} node Node.\n * @return {import(\"../color.js\").Color|undefined} Color.\n */\nfunction readColor(node) {\n  const s = getAllTextContent(node, false);\n  // The KML specification states that colors should not include a leading `#`\n  // but we tolerate them.\n  const m = /^\\s*#?\\s*([0-9A-Fa-f]{8})\\s*$/.exec(s);\n  if (m) {\n    const hexColor = m[1];\n    return [\n      parseInt(hexColor.substr(6, 2), 16),\n      parseInt(hexColor.substr(4, 2), 16),\n      parseInt(hexColor.substr(2, 2), 16),\n      parseInt(hexColor.substr(0, 2), 16) / 255,\n    ];\n  }\n  return undefined;\n}\n\n/**\n * @param {Node} node Node.\n * @return {Array<number>|undefined} Flat coordinates.\n */\nexport function readFlatCoordinates(node) {\n  let s = getAllTextContent(node, false);\n  const flatCoordinates = [];\n  // The KML specification states that coordinate tuples should not include\n  // spaces, but we tolerate them.\n  s = s.replace(/\\s*,\\s*/g, ',');\n  const re =\n    /^\\s*([+\\-]?\\d*\\.?\\d+(?:e[+\\-]?\\d+)?),([+\\-]?\\d*\\.?\\d+(?:e[+\\-]?\\d+)?)(?:\\s+|,|$)(?:([+\\-]?\\d*\\.?\\d+(?:e[+\\-]?\\d+)?)(?:\\s+|$))?\\s*/i;\n  let m;\n  while ((m = re.exec(s))) {\n    const x = parseFloat(m[1]);\n    const y = parseFloat(m[2]);\n    const z = m[3] ? parseFloat(m[3]) : 0;\n    flatCoordinates.push(x, y, z);\n    s = s.substr(m[0].length);\n  }\n  if (s !== '') {\n    return undefined;\n  }\n  return flatCoordinates;\n}\n\n/**\n * @param {Node} node Node.\n * @return {string} URI.\n */\nfunction readURI(node) {\n  const s = getAllTextContent(node, false).trim();\n  let baseURI = node.baseURI;\n  if (!baseURI || baseURI == 'about:blank') {\n    baseURI = window.location.href;\n  }\n  if (baseURI) {\n    const url = new URL(s, baseURI);\n    return url.href;\n  }\n  return s;\n}\n\n/**\n * @param {Node} node Node.\n * @return {string} URI.\n */\nfunction readStyleURL(node) {\n  // KML files in the wild occasionally forget the leading\n  // `#` on styleUrlsdefined in the same document.\n  const s = getAllTextContent(node, false)\n    .trim()\n    .replace(/^(?!.*#)/, '#');\n  let baseURI = node.baseURI;\n  if (!baseURI || baseURI == 'about:blank') {\n    baseURI = window.location.href;\n  }\n  if (baseURI) {\n    const url = new URL(s, baseURI);\n    return url.href;\n  }\n  return s;\n}\n\n/**\n * @param {Element} node Node.\n * @return {Vec2} Vec2.\n */\nfunction readVec2(node) {\n  const xunits = node.getAttribute('xunits');\n  const yunits = node.getAttribute('yunits');\n  /** @type {import('../style/Icon.js').IconOrigin} */\n  let origin;\n  if (xunits !== 'insetPixels') {\n    if (yunits !== 'insetPixels') {\n      origin = 'bottom-left';\n    } else {\n      origin = 'top-left';\n    }\n  } else {\n    if (yunits !== 'insetPixels') {\n      origin = 'bottom-right';\n    } else {\n      origin = 'top-right';\n    }\n  }\n  return {\n    x: parseFloat(node.getAttribute('x')),\n    xunits: ICON_ANCHOR_UNITS_MAP[xunits],\n    y: parseFloat(node.getAttribute('y')),\n    yunits: ICON_ANCHOR_UNITS_MAP[yunits],\n    origin: origin,\n  };\n}\n\n/**\n * @param {Node} node Node.\n * @return {number|undefined} Scale.\n */\nfunction readScale(node) {\n  return readDecimal(node);\n}\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst STYLE_MAP_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'Pair': pairDataParser,\n});\n\n/**\n * @this {KML}\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {Array<Style>|string|undefined} StyleMap.\n */\nfunction readStyleMapValue(node, objectStack) {\n  return pushParseAndPop(undefined, STYLE_MAP_PARSERS, node, objectStack, this);\n}\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst ICON_STYLE_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'Icon': makeObjectPropertySetter(readIcon),\n  'color': makeObjectPropertySetter(readColor),\n  'heading': makeObjectPropertySetter(readDecimal),\n  'hotSpot': makeObjectPropertySetter(readVec2),\n  'scale': makeObjectPropertySetter(readScale),\n});\n\n/**\n * @this {KML}\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n */\nfunction iconStyleParser(node, objectStack) {\n  // FIXME refreshMode\n  // FIXME refreshInterval\n  // FIXME viewRefreshTime\n  // FIXME viewBoundScale\n  // FIXME viewFormat\n  // FIXME httpQuery\n  const object = pushParseAndPop({}, ICON_STYLE_PARSERS, node, objectStack);\n  if (!object) {\n    return;\n  }\n  const styleObject = /** @type {Object} */ (\n    objectStack[objectStack.length - 1]\n  );\n  const IconObject = 'Icon' in object ? object['Icon'] : {};\n  const drawIcon = !('Icon' in object) || Object.keys(IconObject).length > 0;\n  let src;\n  const href = /** @type {string|undefined} */ (IconObject['href']);\n  if (href) {\n    src = href;\n  } else if (drawIcon) {\n    src = DEFAULT_IMAGE_STYLE_SRC;\n  }\n  let anchor, anchorXUnits, anchorYUnits;\n  /** @type {import('../style/Icon.js').IconOrigin|undefined} */\n  let anchorOrigin = 'bottom-left';\n  const hotSpot = /** @type {Vec2|undefined} */ (object['hotSpot']);\n  if (hotSpot) {\n    anchor = [hotSpot.x, hotSpot.y];\n    anchorXUnits = hotSpot.xunits;\n    anchorYUnits = hotSpot.yunits;\n    anchorOrigin = hotSpot.origin;\n  } else if (/^https?:\\/\\/maps\\.(?:google|gstatic)\\.com\\//.test(src)) {\n    // Google hotspots from https://kml4earth.appspot.com/icons.html#notes\n    if (src.includes('pushpin')) {\n      anchor = DEFAULT_IMAGE_STYLE_ANCHOR;\n      anchorXUnits = DEFAULT_IMAGE_STYLE_ANCHOR_X_UNITS;\n      anchorYUnits = DEFAULT_IMAGE_STYLE_ANCHOR_Y_UNITS;\n    } else if (src.includes('arrow-reverse')) {\n      anchor = [54, 42];\n      anchorXUnits = DEFAULT_IMAGE_STYLE_ANCHOR_X_UNITS;\n      anchorYUnits = DEFAULT_IMAGE_STYLE_ANCHOR_Y_UNITS;\n    } else if (src.includes('paddle')) {\n      anchor = [32, 1];\n      anchorXUnits = DEFAULT_IMAGE_STYLE_ANCHOR_X_UNITS;\n      anchorYUnits = DEFAULT_IMAGE_STYLE_ANCHOR_Y_UNITS;\n    }\n  }\n\n  let offset;\n  const x = /** @type {number|undefined} */ (IconObject['x']);\n  const y = /** @type {number|undefined} */ (IconObject['y']);\n  if (x !== undefined && y !== undefined) {\n    offset = [x, y];\n  }\n\n  let size;\n  const w = /** @type {number|undefined} */ (IconObject['w']);\n  const h = /** @type {number|undefined} */ (IconObject['h']);\n  if (w !== undefined && h !== undefined) {\n    size = [w, h];\n  }\n\n  let rotation;\n  const heading = /** @type {number} */ (object['heading']);\n  if (heading !== undefined) {\n    rotation = toRadians(heading);\n  }\n\n  const scale = /** @type {number|undefined} */ (object['scale']);\n\n  const color = /** @type {Array<number>|undefined} */ (object['color']);\n\n  if (drawIcon) {\n    if (src == DEFAULT_IMAGE_STYLE_SRC) {\n      size = DEFAULT_IMAGE_STYLE_SIZE;\n    }\n\n    const imageStyle = new Icon({\n      anchor: anchor,\n      anchorOrigin: anchorOrigin,\n      anchorXUnits: anchorXUnits,\n      anchorYUnits: anchorYUnits,\n      crossOrigin: this.crossOrigin_,\n      offset: offset,\n      offsetOrigin: 'bottom-left',\n      rotation: rotation,\n      scale: scale,\n      size: size,\n      src: this.iconUrlFunction_(src),\n      color: color,\n    });\n\n    const imageScale = imageStyle.getScaleArray()[0];\n    const imageSize = imageStyle.getSize();\n    if (imageSize === null) {\n      const imageState = imageStyle.getImageState();\n      if (imageState === ImageState.IDLE || imageState === ImageState.LOADING) {\n        const listener = function () {\n          const imageState = imageStyle.getImageState();\n          if (\n            !(\n              imageState === ImageState.IDLE ||\n              imageState === ImageState.LOADING\n            )\n          ) {\n            const imageSize = imageStyle.getSize();\n            if (imageSize && imageSize.length == 2) {\n              const resizeScale = scaleForSize(imageSize);\n              imageStyle.setScale(imageScale * resizeScale);\n            }\n            imageStyle.unlistenImageChange(listener);\n          }\n        };\n        imageStyle.listenImageChange(listener);\n        if (imageState === ImageState.IDLE) {\n          imageStyle.load();\n        }\n      }\n    } else if (imageSize.length == 2) {\n      const resizeScale = scaleForSize(imageSize);\n      imageStyle.setScale(imageScale * resizeScale);\n    }\n    styleObject['imageStyle'] = imageStyle;\n  } else {\n    // handle the case when we explicitly want to draw no icon.\n    styleObject['imageStyle'] = DEFAULT_NO_IMAGE_STYLE;\n  }\n}\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst LABEL_STYLE_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'color': makeObjectPropertySetter(readColor),\n  'scale': makeObjectPropertySetter(readScale),\n});\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n */\nfunction labelStyleParser(node, objectStack) {\n  // FIXME colorMode\n  const object = pushParseAndPop({}, LABEL_STYLE_PARSERS, node, objectStack);\n  if (!object) {\n    return;\n  }\n  const styleObject = objectStack[objectStack.length - 1];\n  const textStyle = new Text({\n    fill: new Fill({\n      color:\n        /** @type {import(\"../color.js\").Color} */\n        ('color' in object ? object['color'] : DEFAULT_COLOR),\n    }),\n    scale: /** @type {number|undefined} */ (object['scale']),\n  });\n  styleObject['textStyle'] = textStyle;\n}\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst LINE_STYLE_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'color': makeObjectPropertySetter(readColor),\n  'width': makeObjectPropertySetter(readDecimal),\n});\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n */\nfunction lineStyleParser(node, objectStack) {\n  // FIXME colorMode\n  // FIXME gx:outerColor\n  // FIXME gx:outerWidth\n  // FIXME gx:physicalWidth\n  // FIXME gx:labelVisibility\n  const object = pushParseAndPop({}, LINE_STYLE_PARSERS, node, objectStack);\n  if (!object) {\n    return;\n  }\n  const styleObject = objectStack[objectStack.length - 1];\n  const strokeStyle = new Stroke({\n    color:\n      /** @type {import(\"../color.js\").Color} */\n      ('color' in object ? object['color'] : DEFAULT_COLOR),\n    width: /** @type {number} */ ('width' in object ? object['width'] : 1),\n  });\n  styleObject['strokeStyle'] = strokeStyle;\n}\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst POLY_STYLE_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'color': makeObjectPropertySetter(readColor),\n  'fill': makeObjectPropertySetter(readBoolean),\n  'outline': makeObjectPropertySetter(readBoolean),\n});\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n */\nfunction polyStyleParser(node, objectStack) {\n  // FIXME colorMode\n  const object = pushParseAndPop({}, POLY_STYLE_PARSERS, node, objectStack);\n  if (!object) {\n    return;\n  }\n  const styleObject = objectStack[objectStack.length - 1];\n  const fillStyle = new Fill({\n    color:\n      /** @type {import(\"../color.js\").Color} */\n      ('color' in object ? object['color'] : DEFAULT_COLOR),\n  });\n  styleObject['fillStyle'] = fillStyle;\n  const fill = /** @type {boolean|undefined} */ (object['fill']);\n  if (fill !== undefined) {\n    styleObject['fill'] = fill;\n  }\n  const outline = /** @type {boolean|undefined} */ (object['outline']);\n  if (outline !== undefined) {\n    styleObject['outline'] = outline;\n  }\n}\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst FLAT_LINEAR_RING_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'coordinates': makeReplacer(readFlatCoordinates),\n});\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {Array<number>} LinearRing flat coordinates.\n */\nfunction readFlatLinearRing(node, objectStack) {\n  return pushParseAndPop(null, FLAT_LINEAR_RING_PARSERS, node, objectStack);\n}\n\n/**\n * @param {Node} node Node.\n * @param {Array<*>} objectStack Object stack.\n */\nfunction gxCoordParser(node, objectStack) {\n  const gxTrackObject =\n    /** @type {GxTrackObject} */\n    (objectStack[objectStack.length - 1]);\n  const coordinates = gxTrackObject.coordinates;\n  const s = getAllTextContent(node, false);\n  const re =\n    /^\\s*([+\\-]?\\d+(?:\\.\\d*)?(?:e[+\\-]?\\d*)?)\\s+([+\\-]?\\d+(?:\\.\\d*)?(?:e[+\\-]?\\d*)?)\\s+([+\\-]?\\d+(?:\\.\\d*)?(?:e[+\\-]?\\d*)?)\\s*$/i;\n  const m = re.exec(s);\n  if (m) {\n    const x = parseFloat(m[1]);\n    const y = parseFloat(m[2]);\n    const z = parseFloat(m[3]);\n    coordinates.push([x, y, z]);\n  } else {\n    coordinates.push([]);\n  }\n}\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst GX_MULTITRACK_GEOMETRY_PARSERS = makeStructureNS(GX_NAMESPACE_URIS, {\n  'Track': makeArrayPusher(readGxTrack),\n});\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {MultiLineString|undefined} MultiLineString.\n */\nfunction readGxMultiTrack(node, objectStack) {\n  const lineStrings = pushParseAndPop(\n    [],\n    GX_MULTITRACK_GEOMETRY_PARSERS,\n    node,\n    objectStack\n  );\n  if (!lineStrings) {\n    return undefined;\n  }\n  return new MultiLineString(lineStrings);\n}\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst GX_TRACK_PARSERS = makeStructureNS(\n  NAMESPACE_URIS,\n  {\n    'when': whenParser,\n  },\n  makeStructureNS(GX_NAMESPACE_URIS, {\n    'coord': gxCoordParser,\n  })\n);\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {LineString|undefined} LineString.\n */\nfunction readGxTrack(node, objectStack) {\n  const gxTrackObject = pushParseAndPop(\n    /** @type {GxTrackObject} */ ({\n      coordinates: [],\n      whens: [],\n    }),\n    GX_TRACK_PARSERS,\n    node,\n    objectStack\n  );\n  if (!gxTrackObject) {\n    return undefined;\n  }\n  const flatCoordinates = [];\n  const coordinates = gxTrackObject.coordinates;\n  const whens = gxTrackObject.whens;\n  for (\n    let i = 0, ii = Math.min(coordinates.length, whens.length);\n    i < ii;\n    ++i\n  ) {\n    if (coordinates[i].length == 3) {\n      flatCoordinates.push(\n        coordinates[i][0],\n        coordinates[i][1],\n        coordinates[i][2],\n        whens[i]\n      );\n    }\n  }\n  return new LineString(flatCoordinates, 'XYZM');\n}\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst ICON_PARSERS = makeStructureNS(\n  NAMESPACE_URIS,\n  {\n    'href': makeObjectPropertySetter(readURI),\n  },\n  makeStructureNS(GX_NAMESPACE_URIS, {\n    'x': makeObjectPropertySetter(readDecimal),\n    'y': makeObjectPropertySetter(readDecimal),\n    'w': makeObjectPropertySetter(readDecimal),\n    'h': makeObjectPropertySetter(readDecimal),\n  })\n);\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {Object} Icon object.\n */\nfunction readIcon(node, objectStack) {\n  const iconObject = pushParseAndPop({}, ICON_PARSERS, node, objectStack);\n  if (iconObject) {\n    return iconObject;\n  }\n  return null;\n}\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst GEOMETRY_FLAT_COORDINATES_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'coordinates': makeReplacer(readFlatCoordinates),\n});\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {Array<number>} Flat coordinates.\n */\nfunction readFlatCoordinatesFromNode(node, objectStack) {\n  return pushParseAndPop(\n    null,\n    GEOMETRY_FLAT_COORDINATES_PARSERS,\n    node,\n    objectStack\n  );\n}\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst EXTRUDE_AND_ALTITUDE_MODE_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'extrude': makeObjectPropertySetter(readBoolean),\n  'tessellate': makeObjectPropertySetter(readBoolean),\n  'altitudeMode': makeObjectPropertySetter(readString),\n});\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {LineString|undefined} LineString.\n */\nfunction readLineString(node, objectStack) {\n  const properties = pushParseAndPop(\n    {},\n    EXTRUDE_AND_ALTITUDE_MODE_PARSERS,\n    node,\n    objectStack\n  );\n  const flatCoordinates = readFlatCoordinatesFromNode(node, objectStack);\n  if (flatCoordinates) {\n    const lineString = new LineString(flatCoordinates, 'XYZ');\n    lineString.setProperties(properties, true);\n    return lineString;\n  }\n  return undefined;\n}\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {Polygon|undefined} Polygon.\n */\nfunction readLinearRing(node, objectStack) {\n  const properties = pushParseAndPop(\n    {},\n    EXTRUDE_AND_ALTITUDE_MODE_PARSERS,\n    node,\n    objectStack\n  );\n  const flatCoordinates = readFlatCoordinatesFromNode(node, objectStack);\n  if (flatCoordinates) {\n    const polygon = new Polygon(flatCoordinates, 'XYZ', [\n      flatCoordinates.length,\n    ]);\n    polygon.setProperties(properties, true);\n    return polygon;\n  }\n  return undefined;\n}\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst MULTI_GEOMETRY_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'LineString': makeArrayPusher(readLineString),\n  'LinearRing': makeArrayPusher(readLinearRing),\n  'MultiGeometry': makeArrayPusher(readMultiGeometry),\n  'Point': makeArrayPusher(readPoint),\n  'Polygon': makeArrayPusher(readPolygon),\n});\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {import(\"../geom/Geometry.js\").default} Geometry.\n */\nfunction readMultiGeometry(node, objectStack) {\n  const geometries = pushParseAndPop(\n    [],\n    MULTI_GEOMETRY_PARSERS,\n    node,\n    objectStack\n  );\n  if (!geometries) {\n    return null;\n  }\n  if (geometries.length === 0) {\n    return new GeometryCollection(geometries);\n  }\n  let multiGeometry;\n  let homogeneous = true;\n  const type = geometries[0].getType();\n  let geometry;\n  for (let i = 1, ii = geometries.length; i < ii; ++i) {\n    geometry = geometries[i];\n    if (geometry.getType() != type) {\n      homogeneous = false;\n      break;\n    }\n  }\n  if (homogeneous) {\n    let layout;\n    let flatCoordinates;\n    if (type == 'Point') {\n      const point = geometries[0];\n      layout = point.getLayout();\n      flatCoordinates = point.getFlatCoordinates();\n      for (let i = 1, ii = geometries.length; i < ii; ++i) {\n        geometry = geometries[i];\n        extend(flatCoordinates, geometry.getFlatCoordinates());\n      }\n      multiGeometry = new MultiPoint(flatCoordinates, layout);\n      setCommonGeometryProperties(multiGeometry, geometries);\n    } else if (type == 'LineString') {\n      multiGeometry = new MultiLineString(geometries);\n      setCommonGeometryProperties(multiGeometry, geometries);\n    } else if (type == 'Polygon') {\n      multiGeometry = new MultiPolygon(geometries);\n      setCommonGeometryProperties(multiGeometry, geometries);\n    } else if (type == 'GeometryCollection') {\n      multiGeometry = new GeometryCollection(geometries);\n    } else {\n      assert(false, 37); // Unknown geometry type found\n    }\n  } else {\n    multiGeometry = new GeometryCollection(geometries);\n  }\n  return /** @type {import(\"../geom/Geometry.js\").default} */ (multiGeometry);\n}\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {Point|undefined} Point.\n */\nfunction readPoint(node, objectStack) {\n  const properties = pushParseAndPop(\n    {},\n    EXTRUDE_AND_ALTITUDE_MODE_PARSERS,\n    node,\n    objectStack\n  );\n  const flatCoordinates = readFlatCoordinatesFromNode(node, objectStack);\n  if (flatCoordinates) {\n    const point = new Point(flatCoordinates, 'XYZ');\n    point.setProperties(properties, true);\n    return point;\n  }\n  return undefined;\n}\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst FLAT_LINEAR_RINGS_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'innerBoundaryIs': innerBoundaryIsParser,\n  'outerBoundaryIs': outerBoundaryIsParser,\n});\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {Polygon|undefined} Polygon.\n */\nfunction readPolygon(node, objectStack) {\n  const properties = pushParseAndPop(\n    /** @type {Object<string,*>} */ ({}),\n    EXTRUDE_AND_ALTITUDE_MODE_PARSERS,\n    node,\n    objectStack\n  );\n  const flatLinearRings = pushParseAndPop(\n    [null],\n    FLAT_LINEAR_RINGS_PARSERS,\n    node,\n    objectStack\n  );\n  if (flatLinearRings && flatLinearRings[0]) {\n    const flatCoordinates = flatLinearRings[0];\n    const ends = [flatCoordinates.length];\n    for (let i = 1, ii = flatLinearRings.length; i < ii; ++i) {\n      extend(flatCoordinates, flatLinearRings[i]);\n      ends.push(flatCoordinates.length);\n    }\n    const polygon = new Polygon(flatCoordinates, 'XYZ', ends);\n    polygon.setProperties(properties, true);\n    return polygon;\n  }\n  return undefined;\n}\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst STYLE_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'IconStyle': iconStyleParser,\n  'LabelStyle': labelStyleParser,\n  'LineStyle': lineStyleParser,\n  'PolyStyle': polyStyleParser,\n});\n\n/**\n * @this {KML}\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {Array<Style>} Style.\n */\nfunction readStyle(node, objectStack) {\n  const styleObject = pushParseAndPop(\n    {},\n    STYLE_PARSERS,\n    node,\n    objectStack,\n    this\n  );\n  if (!styleObject) {\n    return null;\n  }\n  let fillStyle =\n    /** @type {Fill} */\n    (\n      'fillStyle' in styleObject ? styleObject['fillStyle'] : DEFAULT_FILL_STYLE\n    );\n  const fill = /** @type {boolean|undefined} */ (styleObject['fill']);\n  if (fill !== undefined && !fill) {\n    fillStyle = null;\n  }\n  let imageStyle;\n  if ('imageStyle' in styleObject) {\n    if (styleObject['imageStyle'] != DEFAULT_NO_IMAGE_STYLE) {\n      imageStyle = /** @type {import(\"../style/Image.js\").default} */ (\n        styleObject['imageStyle']\n      );\n    }\n  } else {\n    imageStyle = DEFAULT_IMAGE_STYLE;\n  }\n  const textStyle =\n    /** @type {Text} */\n    (\n      'textStyle' in styleObject ? styleObject['textStyle'] : DEFAULT_TEXT_STYLE\n    );\n  const strokeStyle =\n    /** @type {Stroke} */\n    (\n      'strokeStyle' in styleObject\n        ? styleObject['strokeStyle']\n        : DEFAULT_STROKE_STYLE\n    );\n  const outline = /** @type {boolean|undefined} */ (styleObject['outline']);\n  if (outline !== undefined && !outline) {\n    // if the polystyle specifies no outline two styles are needed,\n    // one for non-polygon geometries where linestrings require a stroke\n    // and one for polygons where there should be no stroke\n    return [\n      new Style({\n        geometry: function (feature) {\n          const geometry = feature.getGeometry();\n          const type = geometry.getType();\n          if (type === 'GeometryCollection') {\n            const collection =\n              /** @type {import(\"../geom/GeometryCollection\").default} */ (\n                geometry\n              );\n            return new GeometryCollection(\n              collection\n                .getGeometriesArrayRecursive()\n                .filter(function (geometry) {\n                  const type = geometry.getType();\n                  return type !== 'Polygon' && type !== 'MultiPolygon';\n                })\n            );\n          }\n          if (type !== 'Polygon' && type !== 'MultiPolygon') {\n            return geometry;\n          }\n        },\n        fill: fillStyle,\n        image: imageStyle,\n        stroke: strokeStyle,\n        text: textStyle,\n        zIndex: undefined, // FIXME\n      }),\n      new Style({\n        geometry: function (feature) {\n          const geometry = feature.getGeometry();\n          const type = geometry.getType();\n          if (type === 'GeometryCollection') {\n            const collection =\n              /** @type {import(\"../geom/GeometryCollection\").default} */ (\n                geometry\n              );\n            return new GeometryCollection(\n              collection\n                .getGeometriesArrayRecursive()\n                .filter(function (geometry) {\n                  const type = geometry.getType();\n                  return type === 'Polygon' || type === 'MultiPolygon';\n                })\n            );\n          }\n          if (type === 'Polygon' || type === 'MultiPolygon') {\n            return geometry;\n          }\n        },\n        fill: fillStyle,\n        stroke: null,\n        zIndex: undefined, // FIXME\n      }),\n    ];\n  }\n  return [\n    new Style({\n      fill: fillStyle,\n      image: imageStyle,\n      stroke: strokeStyle,\n      text: textStyle,\n      zIndex: undefined, // FIXME\n    }),\n  ];\n}\n\n/**\n * Reads an array of geometries and creates arrays for common geometry\n * properties. Then sets them to the multi geometry.\n * @param {MultiPoint|MultiLineString|MultiPolygon} multiGeometry A multi-geometry.\n * @param {Array<import(\"../geom/Geometry.js\").default>} geometries List of geometries.\n */\nfunction setCommonGeometryProperties(multiGeometry, geometries) {\n  const ii = geometries.length;\n  const extrudes = new Array(geometries.length);\n  const tessellates = new Array(geometries.length);\n  const altitudeModes = new Array(geometries.length);\n  let hasExtrude, hasTessellate, hasAltitudeMode;\n  hasExtrude = false;\n  hasTessellate = false;\n  hasAltitudeMode = false;\n  for (let i = 0; i < ii; ++i) {\n    const geometry = geometries[i];\n    extrudes[i] = geometry.get('extrude');\n    tessellates[i] = geometry.get('tessellate');\n    altitudeModes[i] = geometry.get('altitudeMode');\n    hasExtrude = hasExtrude || extrudes[i] !== undefined;\n    hasTessellate = hasTessellate || tessellates[i] !== undefined;\n    hasAltitudeMode = hasAltitudeMode || altitudeModes[i];\n  }\n  if (hasExtrude) {\n    multiGeometry.set('extrude', extrudes);\n  }\n  if (hasTessellate) {\n    multiGeometry.set('tessellate', tessellates);\n  }\n  if (hasAltitudeMode) {\n    multiGeometry.set('altitudeMode', altitudeModes);\n  }\n}\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst DATA_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'displayName': makeObjectPropertySetter(readString),\n  'value': makeObjectPropertySetter(readString),\n});\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n */\nfunction dataParser(node, objectStack) {\n  const name = node.getAttribute('name');\n  parseNode(DATA_PARSERS, node, objectStack);\n  const featureObject = /** @type {Object} */ (\n    objectStack[objectStack.length - 1]\n  );\n  if (name && featureObject.displayName) {\n    featureObject[name] = {\n      value: featureObject.value,\n      displayName: featureObject.displayName,\n      toString: function () {\n        return featureObject.value;\n      },\n    };\n  } else if (name !== null) {\n    featureObject[name] = featureObject.value;\n  } else if (featureObject.displayName !== null) {\n    featureObject[featureObject.displayName] = featureObject.value;\n  }\n  delete featureObject['value'];\n}\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst EXTENDED_DATA_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'Data': dataParser,\n  'SchemaData': schemaDataParser,\n});\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n */\nfunction extendedDataParser(node, objectStack) {\n  parseNode(EXTENDED_DATA_PARSERS, node, objectStack);\n}\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n */\nfunction regionParser(node, objectStack) {\n  parseNode(REGION_PARSERS, node, objectStack);\n}\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst PAIR_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'Style': makeObjectPropertySetter(readStyle),\n  'key': makeObjectPropertySetter(readString),\n  'styleUrl': makeObjectPropertySetter(readStyleURL),\n});\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n */\nfunction pairDataParser(node, objectStack) {\n  const pairObject = pushParseAndPop({}, PAIR_PARSERS, node, objectStack, this);\n  if (!pairObject) {\n    return;\n  }\n  const key = /** @type {string|undefined} */ (pairObject['key']);\n  if (key && key == 'normal') {\n    const styleUrl = /** @type {string|undefined} */ (pairObject['styleUrl']);\n    if (styleUrl) {\n      objectStack[objectStack.length - 1] = styleUrl;\n    }\n    const style = /** @type {Style} */ (pairObject['Style']);\n    if (style) {\n      objectStack[objectStack.length - 1] = style;\n    }\n  }\n}\n\n/**\n * @this {KML}\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n */\nfunction placemarkStyleMapParser(node, objectStack) {\n  const styleMapValue = readStyleMapValue.call(this, node, objectStack);\n  if (!styleMapValue) {\n    return;\n  }\n  const placemarkObject = objectStack[objectStack.length - 1];\n  if (Array.isArray(styleMapValue)) {\n    placemarkObject['Style'] = styleMapValue;\n  } else if (typeof styleMapValue === 'string') {\n    placemarkObject['styleUrl'] = styleMapValue;\n  } else {\n    assert(false, 38); // `styleMapValue` has an unknown type\n  }\n}\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst SCHEMA_DATA_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'SimpleData': simpleDataParser,\n});\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n */\nfunction schemaDataParser(node, objectStack) {\n  parseNode(SCHEMA_DATA_PARSERS, node, objectStack);\n}\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n */\nfunction simpleDataParser(node, objectStack) {\n  const name = node.getAttribute('name');\n  if (name !== null) {\n    const data = readString(node);\n    const featureObject = /** @type {Object} */ (\n      objectStack[objectStack.length - 1]\n    );\n    featureObject[name] = data;\n  }\n}\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst LAT_LON_ALT_BOX_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'altitudeMode': makeObjectPropertySetter(readString),\n  'minAltitude': makeObjectPropertySetter(readDecimal),\n  'maxAltitude': makeObjectPropertySetter(readDecimal),\n  'north': makeObjectPropertySetter(readDecimal),\n  'south': makeObjectPropertySetter(readDecimal),\n  'east': makeObjectPropertySetter(readDecimal),\n  'west': makeObjectPropertySetter(readDecimal),\n});\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n */\nfunction latLonAltBoxParser(node, objectStack) {\n  const object = pushParseAndPop(\n    {},\n    LAT_LON_ALT_BOX_PARSERS,\n    node,\n    objectStack\n  );\n  if (!object) {\n    return;\n  }\n  const regionObject = /** @type {Object} */ (\n    objectStack[objectStack.length - 1]\n  );\n  const extent = [\n    parseFloat(object['west']),\n    parseFloat(object['south']),\n    parseFloat(object['east']),\n    parseFloat(object['north']),\n  ];\n  regionObject['extent'] = extent;\n  regionObject['altitudeMode'] = object['altitudeMode'];\n  regionObject['minAltitude'] = parseFloat(object['minAltitude']);\n  regionObject['maxAltitude'] = parseFloat(object['maxAltitude']);\n}\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst LOD_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'minLodPixels': makeObjectPropertySetter(readDecimal),\n  'maxLodPixels': makeObjectPropertySetter(readDecimal),\n  'minFadeExtent': makeObjectPropertySetter(readDecimal),\n  'maxFadeExtent': makeObjectPropertySetter(readDecimal),\n});\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n */\nfunction lodParser(node, objectStack) {\n  const object = pushParseAndPop({}, LOD_PARSERS, node, objectStack);\n  if (!object) {\n    return;\n  }\n  const lodObject = /** @type {Object} */ (objectStack[objectStack.length - 1]);\n  lodObject['minLodPixels'] = parseFloat(object['minLodPixels']);\n  lodObject['maxLodPixels'] = parseFloat(object['maxLodPixels']);\n  lodObject['minFadeExtent'] = parseFloat(object['minFadeExtent']);\n  lodObject['maxFadeExtent'] = parseFloat(object['maxFadeExtent']);\n}\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst INNER_BOUNDARY_IS_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  // KML spec only allows one LinearRing  per innerBoundaryIs, but Google Earth\n  // allows multiple, so we parse multiple here too.\n  'LinearRing': makeArrayPusher(readFlatLinearRing),\n});\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n */\nfunction innerBoundaryIsParser(node, objectStack) {\n  const innerBoundaryFlatLinearRings = pushParseAndPop(\n    /** @type {Array<Array<number>>} */ ([]),\n    INNER_BOUNDARY_IS_PARSERS,\n    node,\n    objectStack\n  );\n  if (innerBoundaryFlatLinearRings.length > 0) {\n    const flatLinearRings =\n      /** @type {Array<Array<number>>} */\n      (objectStack[objectStack.length - 1]);\n    flatLinearRings.push(...innerBoundaryFlatLinearRings);\n  }\n}\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst OUTER_BOUNDARY_IS_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'LinearRing': makeReplacer(readFlatLinearRing),\n});\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n */\nfunction outerBoundaryIsParser(node, objectStack) {\n  /** @type {Array<number>|undefined} */\n  const flatLinearRing = pushParseAndPop(\n    undefined,\n    OUTER_BOUNDARY_IS_PARSERS,\n    node,\n    objectStack\n  );\n  if (flatLinearRing) {\n    const flatLinearRings =\n      /** @type {Array<Array<number>>} */\n      (objectStack[objectStack.length - 1]);\n    flatLinearRings[0] = flatLinearRing;\n  }\n}\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n */\nfunction linkParser(node, objectStack) {\n  parseNode(LINK_PARSERS, node, objectStack);\n}\n\n/**\n * @param {Node} node Node.\n * @param {Array<*>} objectStack Object stack.\n */\nfunction whenParser(node, objectStack) {\n  const gxTrackObject =\n    /** @type {GxTrackObject} */\n    (objectStack[objectStack.length - 1]);\n  const whens = gxTrackObject.whens;\n  const s = getAllTextContent(node, false);\n  const when = Date.parse(s);\n  whens.push(isNaN(when) ? 0 : when);\n}\n\n/**\n * @param {Node} node Node to append a TextNode with the color to.\n * @param {import(\"../color.js\").Color|string} color Color.\n */\nfunction writeColorTextNode(node, color) {\n  const rgba = asArray(color);\n  const opacity = rgba.length == 4 ? rgba[3] : 1;\n  /** @type {Array<string|number>} */\n  const abgr = [opacity * 255, rgba[2], rgba[1], rgba[0]];\n  for (let i = 0; i < 4; ++i) {\n    const hex = Math.floor(/** @type {number} */ (abgr[i])).toString(16);\n    abgr[i] = hex.length == 1 ? '0' + hex : hex;\n  }\n  writeStringTextNode(node, abgr.join(''));\n}\n\n/**\n * @param {Node} node Node to append a TextNode with the coordinates to.\n * @param {Array<number>} coordinates Coordinates.\n * @param {Array<*>} objectStack Object stack.\n */\nfunction writeCoordinatesTextNode(node, coordinates, objectStack) {\n  const context = objectStack[objectStack.length - 1];\n\n  const layout = context['layout'];\n  const stride = context['stride'];\n\n  let dimension;\n  if (layout == 'XY' || layout == 'XYM') {\n    dimension = 2;\n  } else if (layout == 'XYZ' || layout == 'XYZM') {\n    dimension = 3;\n  } else {\n    assert(false, 34); // Invalid geometry layout\n  }\n\n  const ii = coordinates.length;\n  let text = '';\n  if (ii > 0) {\n    text += coordinates[0];\n    for (let d = 1; d < dimension; ++d) {\n      text += ',' + coordinates[d];\n    }\n    for (let i = stride; i < ii; i += stride) {\n      text += ' ' + coordinates[i];\n      for (let d = 1; d < dimension; ++d) {\n        text += ',' + coordinates[i + d];\n      }\n    }\n  }\n  writeStringTextNode(node, text);\n}\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Serializer>>}\n */\n// @ts-ignore\nconst EXTENDEDDATA_NODE_SERIALIZERS = makeStructureNS(NAMESPACE_URIS, {\n  'Data': makeChildAppender(writeDataNode),\n  'value': makeChildAppender(writeDataNodeValue),\n  'displayName': makeChildAppender(writeDataNodeName),\n});\n\n/**\n * @param {Element} node Node.\n * @param {{name: *, value: *}} pair Name value pair.\n * @param {Array<*>} objectStack Object stack.\n */\nfunction writeDataNode(node, pair, objectStack) {\n  node.setAttribute('name', pair.name);\n  const /** @type {import(\"../xml.js\").NodeStackItem} */ context = {node: node};\n  const value = pair.value;\n\n  if (typeof value == 'object') {\n    if (value !== null && value.displayName) {\n      pushSerializeAndPop(\n        context,\n        EXTENDEDDATA_NODE_SERIALIZERS,\n        OBJECT_PROPERTY_NODE_FACTORY,\n        [value.displayName],\n        objectStack,\n        ['displayName']\n      );\n    }\n\n    if (value !== null && value.value) {\n      pushSerializeAndPop(\n        context,\n        EXTENDEDDATA_NODE_SERIALIZERS,\n        OBJECT_PROPERTY_NODE_FACTORY,\n        [value.value],\n        objectStack,\n        ['value']\n      );\n    }\n  } else {\n    pushSerializeAndPop(\n      context,\n      EXTENDEDDATA_NODE_SERIALIZERS,\n      OBJECT_PROPERTY_NODE_FACTORY,\n      [value],\n      objectStack,\n      ['value']\n    );\n  }\n}\n\n/**\n * @param {Node} node Node to append a TextNode with the name to.\n * @param {string} name DisplayName.\n */\nfunction writeDataNodeName(node, name) {\n  writeCDATASection(node, name);\n}\n\n/**\n * @param {Node} node Node to append a CDATA Section with the value to.\n * @param {string} value Value.\n */\nfunction writeDataNodeValue(node, value) {\n  writeStringTextNode(node, value);\n}\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Serializer>>}\n */\n// @ts-ignore\nconst DOCUMENT_SERIALIZERS = makeStructureNS(NAMESPACE_URIS, {\n  'Placemark': makeChildAppender(writePlacemark),\n});\n\n/**\n * @const\n * @param {*} value Value.\n * @param {Array<*>} objectStack Object stack.\n * @param {string} [nodeName] Node name.\n * @return {Node|undefined} Node.\n */\nconst DOCUMENT_NODE_FACTORY = function (value, objectStack, nodeName) {\n  const parentNode = objectStack[objectStack.length - 1].node;\n  return createElementNS(parentNode.namespaceURI, 'Placemark');\n};\n\n/**\n * @param {Element} node Node.\n * @param {Array<Feature>} features Features.\n * @param {Array<*>} objectStack Object stack.\n * @this {KML}\n */\nfunction writeDocument(node, features, objectStack) {\n  const /** @type {import(\"../xml.js\").NodeStackItem} */ context = {node: node};\n  pushSerializeAndPop(\n    context,\n    DOCUMENT_SERIALIZERS,\n    DOCUMENT_NODE_FACTORY,\n    features,\n    objectStack,\n    undefined,\n    this\n  );\n}\n\n/**\n * A factory for creating Data nodes.\n * @const\n * @type {function(*, Array<*>): (Node|undefined)}\n */\nconst DATA_NODE_FACTORY = makeSimpleNodeFactory('Data');\n\n/**\n * @param {Element} node Node.\n * @param {{names: Array<string>, values: (Array<*>)}} namesAndValues Names and values.\n * @param {Array<*>} objectStack Object stack.\n */\nfunction writeExtendedData(node, namesAndValues, objectStack) {\n  const /** @type {import(\"../xml.js\").NodeStackItem} */ context = {node: node};\n  const names = namesAndValues.names;\n  const values = namesAndValues.values;\n  const length = names.length;\n\n  for (let i = 0; i < length; i++) {\n    pushSerializeAndPop(\n      context,\n      EXTENDEDDATA_NODE_SERIALIZERS,\n      DATA_NODE_FACTORY,\n      [{name: names[i], value: values[i]}],\n      objectStack\n    );\n  }\n}\n\n/**\n * @const\n * @type {Object<string, Array<string>>}\n */\n// @ts-ignore\nconst ICON_SEQUENCE = makeStructureNS(\n  NAMESPACE_URIS,\n  ['href'],\n  makeStructureNS(GX_NAMESPACE_URIS, ['x', 'y', 'w', 'h'])\n);\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Serializer>>}\n */\n// @ts-ignore\nconst ICON_SERIALIZERS = makeStructureNS(\n  NAMESPACE_URIS,\n  {\n    'href': makeChildAppender(writeStringTextNode),\n  },\n  makeStructureNS(GX_NAMESPACE_URIS, {\n    'x': makeChildAppender(writeDecimalTextNode),\n    'y': makeChildAppender(writeDecimalTextNode),\n    'w': makeChildAppender(writeDecimalTextNode),\n    'h': makeChildAppender(writeDecimalTextNode),\n  })\n);\n\n/**\n * @const\n * @param {*} value Value.\n * @param {Array<*>} objectStack Object stack.\n * @param {string} [nodeName] Node name.\n * @return {Node|undefined} Node.\n */\nconst GX_NODE_FACTORY = function (value, objectStack, nodeName) {\n  return createElementNS(GX_NAMESPACE_URIS[0], 'gx:' + nodeName);\n};\n\n/**\n * @param {Element} node Node.\n * @param {Object} icon Icon object.\n * @param {Array<*>} objectStack Object stack.\n */\nfunction writeIcon(node, icon, objectStack) {\n  const /** @type {import(\"../xml.js\").NodeStackItem} */ context = {node: node};\n  const parentNode = objectStack[objectStack.length - 1].node;\n  let orderedKeys = ICON_SEQUENCE[parentNode.namespaceURI];\n  let values = makeSequence(icon, orderedKeys);\n  pushSerializeAndPop(\n    context,\n    ICON_SERIALIZERS,\n    OBJECT_PROPERTY_NODE_FACTORY,\n    values,\n    objectStack,\n    orderedKeys\n  );\n  orderedKeys = ICON_SEQUENCE[GX_NAMESPACE_URIS[0]];\n  values = makeSequence(icon, orderedKeys);\n  pushSerializeAndPop(\n    context,\n    ICON_SERIALIZERS,\n    GX_NODE_FACTORY,\n    values,\n    objectStack,\n    orderedKeys\n  );\n}\n\n/**\n * @const\n * @type {Object<string, Array<string>>}\n */\n// @ts-ignore\nconst ICON_STYLE_SEQUENCE = makeStructureNS(NAMESPACE_URIS, [\n  'scale',\n  'heading',\n  'Icon',\n  'color',\n  'hotSpot',\n]);\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Serializer>>}\n */\n// @ts-ignore\nconst ICON_STYLE_SERIALIZERS = makeStructureNS(NAMESPACE_URIS, {\n  'Icon': makeChildAppender(writeIcon),\n  'color': makeChildAppender(writeColorTextNode),\n  'heading': makeChildAppender(writeDecimalTextNode),\n  'hotSpot': makeChildAppender(writeVec2),\n  'scale': makeChildAppender(writeScaleTextNode),\n});\n\n/**\n * @param {Element} node Node.\n * @param {import(\"../style/Icon.js\").default} style Icon style.\n * @param {Array<*>} objectStack Object stack.\n */\nfunction writeIconStyle(node, style, objectStack) {\n  const /** @type {import(\"../xml.js\").NodeStackItem} */ context = {node: node};\n  const /** @type {Object<string, any>} */ properties = {};\n  const src = style.getSrc();\n  const size = style.getSize();\n  const iconImageSize = style.getImageSize();\n  const iconProperties = {\n    'href': src,\n  };\n\n  if (size) {\n    iconProperties['w'] = size[0];\n    iconProperties['h'] = size[1];\n    const anchor = style.getAnchor(); // top-left\n    const origin = style.getOrigin(); // top-left\n\n    if (origin && iconImageSize && origin[0] !== 0 && origin[1] !== size[1]) {\n      iconProperties['x'] = origin[0];\n      iconProperties['y'] = iconImageSize[1] - (origin[1] + size[1]);\n    }\n\n    if (anchor && (anchor[0] !== size[0] / 2 || anchor[1] !== size[1] / 2)) {\n      const /** @type {Vec2} */ hotSpot = {\n          x: anchor[0],\n          xunits: 'pixels',\n          y: size[1] - anchor[1],\n          yunits: 'pixels',\n        };\n      properties['hotSpot'] = hotSpot;\n    }\n  }\n\n  properties['Icon'] = iconProperties;\n\n  let scale = style.getScaleArray()[0];\n  let imageSize = size;\n  if (imageSize === null) {\n    imageSize = DEFAULT_IMAGE_STYLE_SIZE;\n  }\n  if (imageSize.length == 2) {\n    const resizeScale = scaleForSize(imageSize);\n    scale = scale / resizeScale;\n  }\n  if (scale !== 1) {\n    properties['scale'] = scale;\n  }\n\n  const rotation = style.getRotation();\n  if (rotation !== 0) {\n    properties['heading'] = rotation; // 0-360\n  }\n\n  const color = style.getColor();\n  if (color) {\n    properties['color'] = color;\n  }\n\n  const parentNode = objectStack[objectStack.length - 1].node;\n  const orderedKeys = ICON_STYLE_SEQUENCE[parentNode.namespaceURI];\n  const values = makeSequence(properties, orderedKeys);\n  pushSerializeAndPop(\n    context,\n    ICON_STYLE_SERIALIZERS,\n    OBJECT_PROPERTY_NODE_FACTORY,\n    values,\n    objectStack,\n    orderedKeys\n  );\n}\n\n/**\n * @const\n * @type {Object<string, Array<string>>}\n */\n// @ts-ignore\nconst LABEL_STYLE_SEQUENCE = makeStructureNS(NAMESPACE_URIS, [\n  'color',\n  'scale',\n]);\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Serializer>>}\n */\n// @ts-ignore\nconst LABEL_STYLE_SERIALIZERS = makeStructureNS(NAMESPACE_URIS, {\n  'color': makeChildAppender(writeColorTextNode),\n  'scale': makeChildAppender(writeScaleTextNode),\n});\n\n/**\n * @param {Element} node Node.\n * @param {Text} style style.\n * @param {Array<*>} objectStack Object stack.\n */\nfunction writeLabelStyle(node, style, objectStack) {\n  const /** @type {import(\"../xml.js\").NodeStackItem} */ context = {node: node};\n  const properties = {};\n  const fill = style.getFill();\n  if (fill) {\n    properties['color'] = fill.getColor();\n  }\n  const scale = style.getScale();\n  if (scale && scale !== 1) {\n    properties['scale'] = scale;\n  }\n  const parentNode = objectStack[objectStack.length - 1].node;\n  const orderedKeys = LABEL_STYLE_SEQUENCE[parentNode.namespaceURI];\n  const values = makeSequence(properties, orderedKeys);\n  pushSerializeAndPop(\n    context,\n    LABEL_STYLE_SERIALIZERS,\n    OBJECT_PROPERTY_NODE_FACTORY,\n    values,\n    objectStack,\n    orderedKeys\n  );\n}\n\n/**\n * @const\n * @type {Object<string, Array<string>>}\n */\n// @ts-ignore\nconst LINE_STYLE_SEQUENCE = makeStructureNS(NAMESPACE_URIS, ['color', 'width']);\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Serializer>>}\n */\n// @ts-ignore\nconst LINE_STYLE_SERIALIZERS = makeStructureNS(NAMESPACE_URIS, {\n  'color': makeChildAppender(writeColorTextNode),\n  'width': makeChildAppender(writeDecimalTextNode),\n});\n\n/**\n * @param {Element} node Node.\n * @param {Stroke} style style.\n * @param {Array<*>} objectStack Object stack.\n */\nfunction writeLineStyle(node, style, objectStack) {\n  const /** @type {import(\"../xml.js\").NodeStackItem} */ context = {node: node};\n  const properties = {\n    'color': style.getColor(),\n    'width': Number(style.getWidth()) || 1,\n  };\n  const parentNode = objectStack[objectStack.length - 1].node;\n  const orderedKeys = LINE_STYLE_SEQUENCE[parentNode.namespaceURI];\n  const values = makeSequence(properties, orderedKeys);\n  pushSerializeAndPop(\n    context,\n    LINE_STYLE_SERIALIZERS,\n    OBJECT_PROPERTY_NODE_FACTORY,\n    values,\n    objectStack,\n    orderedKeys\n  );\n}\n\n/**\n * @const\n * @type {Object<string, string>}\n */\nconst GEOMETRY_TYPE_TO_NODENAME = {\n  'Point': 'Point',\n  'LineString': 'LineString',\n  'LinearRing': 'LinearRing',\n  'Polygon': 'Polygon',\n  'MultiPoint': 'MultiGeometry',\n  'MultiLineString': 'MultiGeometry',\n  'MultiPolygon': 'MultiGeometry',\n  'GeometryCollection': 'MultiGeometry',\n};\n\n/**\n * @const\n * @param {*} value Value.\n * @param {Array<*>} objectStack Object stack.\n * @param {string} [nodeName] Node name.\n * @return {Node|undefined} Node.\n */\nconst GEOMETRY_NODE_FACTORY = function (value, objectStack, nodeName) {\n  if (value) {\n    const parentNode = objectStack[objectStack.length - 1].node;\n    return createElementNS(\n      parentNode.namespaceURI,\n      GEOMETRY_TYPE_TO_NODENAME[\n        /** @type {import(\"../geom/Geometry.js\").default} */ (value).getType()\n      ]\n    );\n  }\n};\n\n/**\n * A factory for creating Point nodes.\n * @const\n * @type {function(*, Array<*>, string=): (Node|undefined)}\n */\nconst POINT_NODE_FACTORY = makeSimpleNodeFactory('Point');\n\n/**\n * A factory for creating LineString nodes.\n * @const\n * @type {function(*, Array<*>, string=): (Node|undefined)}\n */\nconst LINE_STRING_NODE_FACTORY = makeSimpleNodeFactory('LineString');\n\n/**\n * A factory for creating LinearRing nodes.\n * @const\n * @type {function(*, Array<*>, string=): (Node|undefined)}\n */\nconst LINEAR_RING_NODE_FACTORY = makeSimpleNodeFactory('LinearRing');\n\n/**\n * A factory for creating Polygon nodes.\n * @const\n * @type {function(*, Array<*>, string=): (Node|undefined)}\n */\nconst POLYGON_NODE_FACTORY = makeSimpleNodeFactory('Polygon');\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Serializer>>}\n */\n// @ts-ignore\nconst MULTI_GEOMETRY_SERIALIZERS = makeStructureNS(NAMESPACE_URIS, {\n  'LineString': makeChildAppender(writePrimitiveGeometry),\n  'Point': makeChildAppender(writePrimitiveGeometry),\n  'Polygon': makeChildAppender(writePolygon),\n  'GeometryCollection': makeChildAppender(writeMultiGeometry),\n});\n\n/**\n * @param {Element} node Node.\n * @param {import(\"../geom/Geometry.js\").default} geometry Geometry.\n * @param {Array<*>} objectStack Object stack.\n */\nfunction writeMultiGeometry(node, geometry, objectStack) {\n  /** @type {import(\"../xml.js\").NodeStackItem} */\n  const context = {node: node};\n  const type = geometry.getType();\n  /** @type {Array<import(\"../geom/Geometry.js\").default>} */\n  let geometries = [];\n  /** @type {function(*, Array<*>, string=): (Node|undefined)} */\n  let factory;\n  if (type === 'GeometryCollection') {\n    /** @type {GeometryCollection} */ (geometry)\n      .getGeometriesArrayRecursive()\n      .forEach(function (geometry) {\n        const type = geometry.getType();\n        if (type === 'MultiPoint') {\n          geometries = geometries.concat(\n            /** @type {MultiPoint} */ (geometry).getPoints()\n          );\n        } else if (type === 'MultiLineString') {\n          geometries = geometries.concat(\n            /** @type {MultiLineString} */ (geometry).getLineStrings()\n          );\n        } else if (type === 'MultiPolygon') {\n          geometries = geometries.concat(\n            /** @type {MultiPolygon} */ (geometry).getPolygons()\n          );\n        } else if (\n          type === 'Point' ||\n          type === 'LineString' ||\n          type === 'Polygon'\n        ) {\n          geometries.push(geometry);\n        } else {\n          assert(false, 39); // Unknown geometry type\n        }\n      });\n    factory = GEOMETRY_NODE_FACTORY;\n  } else if (type === 'MultiPoint') {\n    geometries = /** @type {MultiPoint} */ (geometry).getPoints();\n    factory = POINT_NODE_FACTORY;\n  } else if (type === 'MultiLineString') {\n    geometries = /** @type {MultiLineString} */ (geometry).getLineStrings();\n    factory = LINE_STRING_NODE_FACTORY;\n  } else if (type === 'MultiPolygon') {\n    geometries = /** @type {MultiPolygon} */ (geometry).getPolygons();\n    factory = POLYGON_NODE_FACTORY;\n  } else {\n    assert(false, 39); // Unknown geometry type\n  }\n  pushSerializeAndPop(\n    context,\n    MULTI_GEOMETRY_SERIALIZERS,\n    factory,\n    geometries,\n    objectStack\n  );\n}\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Serializer>>}\n */\n// @ts-ignore\nconst BOUNDARY_IS_SERIALIZERS = makeStructureNS(NAMESPACE_URIS, {\n  'LinearRing': makeChildAppender(writePrimitiveGeometry),\n});\n\n/**\n * @param {Element} node Node.\n * @param {import(\"../geom/LinearRing.js\").default} linearRing Linear ring.\n * @param {Array<*>} objectStack Object stack.\n */\nfunction writeBoundaryIs(node, linearRing, objectStack) {\n  const /** @type {import(\"../xml.js\").NodeStackItem} */ context = {node: node};\n  pushSerializeAndPop(\n    context,\n    BOUNDARY_IS_SERIALIZERS,\n    LINEAR_RING_NODE_FACTORY,\n    [linearRing],\n    objectStack\n  );\n}\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Serializer>>}\n */\n// @ts-ignore\nconst PLACEMARK_SERIALIZERS = makeStructureNS(NAMESPACE_URIS, {\n  'ExtendedData': makeChildAppender(writeExtendedData),\n  'MultiGeometry': makeChildAppender(writeMultiGeometry),\n  'LineString': makeChildAppender(writePrimitiveGeometry),\n  'LinearRing': makeChildAppender(writePrimitiveGeometry),\n  'Point': makeChildAppender(writePrimitiveGeometry),\n  'Polygon': makeChildAppender(writePolygon),\n  'Style': makeChildAppender(writeStyle),\n  'address': makeChildAppender(writeStringTextNode),\n  'description': makeChildAppender(writeStringTextNode),\n  'name': makeChildAppender(writeStringTextNode),\n  'open': makeChildAppender(writeBooleanTextNode),\n  'phoneNumber': makeChildAppender(writeStringTextNode),\n  'styleUrl': makeChildAppender(writeStringTextNode),\n  'visibility': makeChildAppender(writeBooleanTextNode),\n});\n\n/**\n * @const\n * @type {Object<string, Array<string>>}\n */\n// @ts-ignore\nconst PLACEMARK_SEQUENCE = makeStructureNS(NAMESPACE_URIS, [\n  'name',\n  'open',\n  'visibility',\n  'address',\n  'phoneNumber',\n  'description',\n  'styleUrl',\n  'Style',\n]);\n\n/**\n * A factory for creating ExtendedData nodes.\n * @const\n * @type {function(*, Array<*>): (Node|undefined)}\n */\nconst EXTENDEDDATA_NODE_FACTORY = makeSimpleNodeFactory('ExtendedData');\n\n/**\n * FIXME currently we do serialize arbitrary/custom feature properties\n * (ExtendedData).\n * @param {Element} node Node.\n * @param {Feature} feature Feature.\n * @param {Array<*>} objectStack Object stack.\n * @this {KML}\n */\nfunction writePlacemark(node, feature, objectStack) {\n  const /** @type {import(\"../xml.js\").NodeStackItem} */ context = {node: node};\n\n  // set id\n  if (feature.getId()) {\n    node.setAttribute('id', /** @type {string} */ (feature.getId()));\n  }\n\n  // serialize properties (properties unknown to KML are not serialized)\n  const properties = feature.getProperties();\n\n  // don't export these to ExtendedData\n  const filter = {\n    'address': 1,\n    'description': 1,\n    'name': 1,\n    'open': 1,\n    'phoneNumber': 1,\n    'styleUrl': 1,\n    'visibility': 1,\n  };\n  filter[feature.getGeometryName()] = 1;\n  const keys = Object.keys(properties || {})\n    .sort()\n    .filter(function (v) {\n      return !filter[v];\n    });\n\n  const styleFunction = feature.getStyleFunction();\n  if (styleFunction) {\n    // FIXME the styles returned by the style function are supposed to be\n    // resolution-independent here\n    const styles = styleFunction(feature, 0);\n    if (styles) {\n      const styleArray = Array.isArray(styles) ? styles : [styles];\n      let pointStyles = styleArray;\n      if (feature.getGeometry()) {\n        pointStyles = styleArray.filter(function (style) {\n          const geometry = style.getGeometryFunction()(feature);\n          if (geometry) {\n            const type = geometry.getType();\n            if (type === 'GeometryCollection') {\n              return /** @type {GeometryCollection} */ (geometry)\n                .getGeometriesArrayRecursive()\n                .filter(function (geometry) {\n                  const type = geometry.getType();\n                  return type === 'Point' || type === 'MultiPoint';\n                }).length;\n            }\n            return type === 'Point' || type === 'MultiPoint';\n          }\n        });\n        ('Point');\n      }\n      if (this.writeStyles_) {\n        let lineStyles = styleArray;\n        let polyStyles = styleArray;\n        if (feature.getGeometry()) {\n          lineStyles = styleArray.filter(function (style) {\n            const geometry = style.getGeometryFunction()(feature);\n            if (geometry) {\n              const type = geometry.getType();\n              if (type === 'GeometryCollection') {\n                return /** @type {GeometryCollection} */ (geometry)\n                  .getGeometriesArrayRecursive()\n                  .filter(function (geometry) {\n                    const type = geometry.getType();\n                    return type === 'LineString' || type === 'MultiLineString';\n                  }).length;\n              }\n              return type === 'LineString' || type === 'MultiLineString';\n            }\n          });\n          polyStyles = styleArray.filter(function (style) {\n            const geometry = style.getGeometryFunction()(feature);\n            if (geometry) {\n              const type = geometry.getType();\n              if (type === 'GeometryCollection') {\n                return /** @type {GeometryCollection} */ (geometry)\n                  .getGeometriesArrayRecursive()\n                  .filter(function (geometry) {\n                    const type = geometry.getType();\n                    return type === 'Polygon' || type === 'MultiPolygon';\n                  }).length;\n              }\n              return type === 'Polygon' || type === 'MultiPolygon';\n            }\n          });\n        }\n        properties['Style'] = {\n          pointStyles: pointStyles,\n          lineStyles: lineStyles,\n          polyStyles: polyStyles,\n        };\n      }\n      if (pointStyles.length && properties['name'] === undefined) {\n        const textStyle = pointStyles[0].getText();\n        if (textStyle) {\n          properties['name'] = textStyle.getText();\n        }\n      }\n    }\n  }\n  const parentNode = objectStack[objectStack.length - 1].node;\n  const orderedKeys = PLACEMARK_SEQUENCE[parentNode.namespaceURI];\n  const values = makeSequence(properties, orderedKeys);\n  pushSerializeAndPop(\n    context,\n    PLACEMARK_SERIALIZERS,\n    OBJECT_PROPERTY_NODE_FACTORY,\n    values,\n    objectStack,\n    orderedKeys\n  );\n\n  if (keys.length > 0) {\n    const sequence = makeSequence(properties, keys);\n    const namesAndValues = {names: keys, values: sequence};\n    pushSerializeAndPop(\n      context,\n      PLACEMARK_SERIALIZERS,\n      EXTENDEDDATA_NODE_FACTORY,\n      [namesAndValues],\n      objectStack\n    );\n  }\n\n  // serialize geometry\n  const options = /** @type {import(\"./Feature.js\").WriteOptions} */ (\n    objectStack[0]\n  );\n  let geometry = feature.getGeometry();\n  if (geometry) {\n    geometry = transformGeometryWithOptions(geometry, true, options);\n  }\n  pushSerializeAndPop(\n    context,\n    PLACEMARK_SERIALIZERS,\n    GEOMETRY_NODE_FACTORY,\n    [geometry],\n    objectStack\n  );\n}\n\n/**\n * @const\n * @type {Object<string, Array<string>>}\n */\n// @ts-ignore\nconst PRIMITIVE_GEOMETRY_SEQUENCE = makeStructureNS(NAMESPACE_URIS, [\n  'extrude',\n  'tessellate',\n  'altitudeMode',\n  'coordinates',\n]);\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Serializer>>}\n */\n// @ts-ignore\nconst PRIMITIVE_GEOMETRY_SERIALIZERS = makeStructureNS(NAMESPACE_URIS, {\n  'extrude': makeChildAppender(writeBooleanTextNode),\n  'tessellate': makeChildAppender(writeBooleanTextNode),\n  'altitudeMode': makeChildAppender(writeStringTextNode),\n  'coordinates': makeChildAppender(writeCoordinatesTextNode),\n});\n\n/**\n * @param {Element} node Node.\n * @param {import(\"../geom/SimpleGeometry.js\").default} geometry Geometry.\n * @param {Array<*>} objectStack Object stack.\n */\nfunction writePrimitiveGeometry(node, geometry, objectStack) {\n  const flatCoordinates = geometry.getFlatCoordinates();\n  const /** @type {import(\"../xml.js\").NodeStackItem} */ context = {node: node};\n  context['layout'] = geometry.getLayout();\n  context['stride'] = geometry.getStride();\n\n  // serialize properties (properties unknown to KML are not serialized)\n  const properties = geometry.getProperties();\n  properties.coordinates = flatCoordinates;\n\n  const parentNode = objectStack[objectStack.length - 1].node;\n  const orderedKeys = PRIMITIVE_GEOMETRY_SEQUENCE[parentNode.namespaceURI];\n  const values = makeSequence(properties, orderedKeys);\n  pushSerializeAndPop(\n    context,\n    PRIMITIVE_GEOMETRY_SERIALIZERS,\n    OBJECT_PROPERTY_NODE_FACTORY,\n    values,\n    objectStack,\n    orderedKeys\n  );\n}\n\n/**\n * @const\n * @type {Object<string, Array<string>>}\n */\n// @ts-ignore\nconst POLY_STYLE_SEQUENCE = makeStructureNS(NAMESPACE_URIS, [\n  'color',\n  'fill',\n  'outline',\n]);\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Serializer>>}\n */\n// @ts-ignore\nconst POLYGON_SERIALIZERS = makeStructureNS(NAMESPACE_URIS, {\n  'outerBoundaryIs': makeChildAppender(writeBoundaryIs),\n  'innerBoundaryIs': makeChildAppender(writeBoundaryIs),\n});\n\n/**\n * A factory for creating innerBoundaryIs nodes.\n * @const\n * @type {function(*, Array<*>, string=): (Node|undefined)}\n */\nconst INNER_BOUNDARY_NODE_FACTORY = makeSimpleNodeFactory('innerBoundaryIs');\n\n/**\n * A factory for creating outerBoundaryIs nodes.\n * @const\n * @type {function(*, Array<*>, string=): (Node|undefined)}\n */\nconst OUTER_BOUNDARY_NODE_FACTORY = makeSimpleNodeFactory('outerBoundaryIs');\n\n/**\n * @param {Element} node Node.\n * @param {Polygon} polygon Polygon.\n * @param {Array<*>} objectStack Object stack.\n */\nfunction writePolygon(node, polygon, objectStack) {\n  const linearRings = polygon.getLinearRings();\n  const outerRing = linearRings.shift();\n  const /** @type {import(\"../xml.js\").NodeStackItem} */ context = {node: node};\n  // inner rings\n  pushSerializeAndPop(\n    context,\n    POLYGON_SERIALIZERS,\n    INNER_BOUNDARY_NODE_FACTORY,\n    linearRings,\n    objectStack\n  );\n  // outer ring\n  pushSerializeAndPop(\n    context,\n    POLYGON_SERIALIZERS,\n    OUTER_BOUNDARY_NODE_FACTORY,\n    [outerRing],\n    objectStack\n  );\n}\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Serializer>>}\n */\n// @ts-ignore\nconst POLY_STYLE_SERIALIZERS = makeStructureNS(NAMESPACE_URIS, {\n  'color': makeChildAppender(writeColorTextNode),\n  'fill': makeChildAppender(writeBooleanTextNode),\n  'outline': makeChildAppender(writeBooleanTextNode),\n});\n\n/**\n * @param {Element} node Node.\n * @param {Style} style Style.\n * @param {Array<*>} objectStack Object stack.\n */\nfunction writePolyStyle(node, style, objectStack) {\n  const /** @type {import(\"../xml.js\").NodeStackItem} */ context = {node: node};\n  const fill = style.getFill();\n  const stroke = style.getStroke();\n  const properties = {\n    'color': fill ? fill.getColor() : undefined,\n    'fill': fill ? undefined : false,\n    'outline': stroke ? undefined : false,\n  };\n  const parentNode = objectStack[objectStack.length - 1].node;\n  const orderedKeys = POLY_STYLE_SEQUENCE[parentNode.namespaceURI];\n  const values = makeSequence(properties, orderedKeys);\n  pushSerializeAndPop(\n    context,\n    POLY_STYLE_SERIALIZERS,\n    OBJECT_PROPERTY_NODE_FACTORY,\n    values,\n    objectStack,\n    orderedKeys\n  );\n}\n\n/**\n * @param {Node} node Node to append a TextNode with the scale to.\n * @param {number|undefined} scale Scale.\n */\nfunction writeScaleTextNode(node, scale) {\n  // the Math is to remove any excess decimals created by float arithmetic\n  writeDecimalTextNode(node, Math.round(scale * 1e6) / 1e6);\n}\n\n/**\n * @const\n * @type {Object<string, Array<string>>}\n */\n// @ts-ignore\nconst STYLE_SEQUENCE = makeStructureNS(NAMESPACE_URIS, [\n  'IconStyle',\n  'LabelStyle',\n  'LineStyle',\n  'PolyStyle',\n]);\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Serializer>>}\n */\n// @ts-ignore\nconst STYLE_SERIALIZERS = makeStructureNS(NAMESPACE_URIS, {\n  'IconStyle': makeChildAppender(writeIconStyle),\n  'LabelStyle': makeChildAppender(writeLabelStyle),\n  'LineStyle': makeChildAppender(writeLineStyle),\n  'PolyStyle': makeChildAppender(writePolyStyle),\n});\n\n/**\n * @param {Element} node Node.\n * @param {Object<string, Array<Style>>} styles Styles.\n * @param {Array<*>} objectStack Object stack.\n */\nfunction writeStyle(node, styles, objectStack) {\n  const /** @type {import(\"../xml.js\").NodeStackItem} */ context = {node: node};\n  const properties = {};\n  if (styles.pointStyles.length) {\n    const textStyle = styles.pointStyles[0].getText();\n    if (textStyle) {\n      properties['LabelStyle'] = textStyle;\n    }\n    const imageStyle = styles.pointStyles[0].getImage();\n    if (\n      imageStyle &&\n      typeof (/** @type {?} */ (imageStyle).getSrc) === 'function'\n    ) {\n      properties['IconStyle'] = imageStyle;\n    }\n  }\n  if (styles.lineStyles.length) {\n    const strokeStyle = styles.lineStyles[0].getStroke();\n    if (strokeStyle) {\n      properties['LineStyle'] = strokeStyle;\n    }\n  }\n  if (styles.polyStyles.length) {\n    const strokeStyle = styles.polyStyles[0].getStroke();\n    if (strokeStyle && !properties['LineStyle']) {\n      properties['LineStyle'] = strokeStyle;\n    }\n    properties['PolyStyle'] = styles.polyStyles[0];\n  }\n  const parentNode = objectStack[objectStack.length - 1].node;\n  const orderedKeys = STYLE_SEQUENCE[parentNode.namespaceURI];\n  const values = makeSequence(properties, orderedKeys);\n  pushSerializeAndPop(\n    context,\n    STYLE_SERIALIZERS,\n    OBJECT_PROPERTY_NODE_FACTORY,\n    values,\n    objectStack,\n    orderedKeys\n  );\n}\n\n/**\n * @param {Element} node Node to append a TextNode with the Vec2 to.\n * @param {Vec2} vec2 Vec2.\n */\nfunction writeVec2(node, vec2) {\n  node.setAttribute('x', String(vec2.x));\n  node.setAttribute('y', String(vec2.y));\n  node.setAttribute('xunits', vec2.xunits);\n  node.setAttribute('yunits', vec2.yunits);\n}\n\nexport default KML;\n","/**\n * @module ol/format/OSMXML\n */\n// FIXME add typedef for stack state objects\nimport Feature from '../Feature.js';\nimport LineString from '../geom/LineString.js';\nimport Point from '../geom/Point.js';\nimport Polygon from '../geom/Polygon.js';\nimport XMLFeature from './XMLFeature.js';\nimport {extend} from '../array.js';\nimport {get as getProjection} from '../proj.js';\nimport {isEmpty} from '../obj.js';\nimport {makeStructureNS, pushParseAndPop} from '../xml.js';\nimport {transformGeometryWithOptions} from './Feature.js';\n\n/**\n * @const\n * @type {Array<null>}\n */\nconst NAMESPACE_URIS = [null];\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst WAY_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'nd': readNd,\n  'tag': readTag,\n});\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'node': readNode,\n  'way': readWay,\n});\n\n/**\n * @classdesc\n * Feature format for reading data in the\n * [OSMXML format](https://wiki.openstreetmap.org/wiki/OSM_XML).\n *\n * @api\n */\nclass OSMXML extends XMLFeature {\n  constructor() {\n    super();\n\n    /**\n     * @type {import(\"../proj/Projection.js\").default}\n     */\n    this.dataProjection = getProjection('EPSG:4326');\n  }\n\n  /**\n   * @protected\n   * @param {Element} node Node.\n   * @param {import(\"./Feature.js\").ReadOptions} [options] Options.\n   * @return {Array<import(\"../Feature.js\").default>} Features.\n   */\n  readFeaturesFromNode(node, options) {\n    options = this.getReadOptions(node, options);\n    if (node.localName == 'osm') {\n      const state = pushParseAndPop(\n        {\n          nodes: {},\n          ways: [],\n          features: [],\n        },\n        PARSERS,\n        node,\n        [options]\n      );\n      // parse nodes in ways\n      for (let j = 0; j < state.ways.length; j++) {\n        const values = /** @type {Object} */ (state.ways[j]);\n        /** @type {Array<number>} */\n        const flatCoordinates = values.flatCoordinates;\n        if (!flatCoordinates.length) {\n          for (let i = 0, ii = values.ndrefs.length; i < ii; i++) {\n            const point = state.nodes[values.ndrefs[i]];\n            extend(flatCoordinates, point);\n          }\n        }\n        let geometry;\n        if (values.ndrefs[0] == values.ndrefs[values.ndrefs.length - 1]) {\n          // closed way\n          geometry = new Polygon(flatCoordinates, 'XY', [\n            flatCoordinates.length,\n          ]);\n        } else {\n          geometry = new LineString(flatCoordinates, 'XY');\n        }\n        transformGeometryWithOptions(geometry, false, options);\n        const feature = new Feature(geometry);\n        if (values.id !== undefined) {\n          feature.setId(values.id);\n        }\n        feature.setProperties(values.tags, true);\n        state.features.push(feature);\n      }\n      if (state.features) {\n        return state.features;\n      }\n    }\n    return [];\n  }\n}\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst NODE_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'tag': readTag,\n});\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n */\nfunction readNode(node, objectStack) {\n  const options = /** @type {import(\"./Feature.js\").ReadOptions} */ (\n    objectStack[0]\n  );\n  const state = /** @type {Object} */ (objectStack[objectStack.length - 1]);\n  const id = node.getAttribute('id');\n  /** @type {import(\"../coordinate.js\").Coordinate} */\n  const coordinates = [\n    parseFloat(node.getAttribute('lon')),\n    parseFloat(node.getAttribute('lat')),\n  ];\n  state.nodes[id] = coordinates;\n\n  const values = pushParseAndPop(\n    {\n      tags: {},\n    },\n    NODE_PARSERS,\n    node,\n    objectStack\n  );\n  if (!isEmpty(values.tags)) {\n    const geometry = new Point(coordinates);\n    transformGeometryWithOptions(geometry, false, options);\n    const feature = new Feature(geometry);\n    if (id !== undefined) {\n      feature.setId(id);\n    }\n    feature.setProperties(values.tags, true);\n    state.features.push(feature);\n  }\n}\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n */\nfunction readWay(node, objectStack) {\n  const id = node.getAttribute('id');\n  const values = pushParseAndPop(\n    {\n      id: id,\n      ndrefs: [],\n      flatCoordinates: [],\n      tags: {},\n    },\n    WAY_PARSERS,\n    node,\n    objectStack\n  );\n  const state = /** @type {Object} */ (objectStack[objectStack.length - 1]);\n  state.ways.push(values);\n}\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n */\nfunction readNd(node, objectStack) {\n  const values = /** @type {Object} */ (objectStack[objectStack.length - 1]);\n  values.ndrefs.push(node.getAttribute('ref'));\n  if (node.hasAttribute('lon') && node.hasAttribute('lat')) {\n    values.flatCoordinates.push(parseFloat(node.getAttribute('lon')));\n    values.flatCoordinates.push(parseFloat(node.getAttribute('lat')));\n  }\n}\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n */\nfunction readTag(node, objectStack) {\n  const values = /** @type {Object} */ (objectStack[objectStack.length - 1]);\n  values.tags[node.getAttribute('k')] = node.getAttribute('v');\n}\n\nexport default OSMXML;\n","/**\n * @module ol/format/XML\n */\nimport {isDocument, parse} from '../xml.js';\n\n/**\n * @classdesc\n * Generic format for reading non-feature XML data\n *\n * @abstract\n */\nclass XML {\n  /**\n   * Read the source document.\n   *\n   * @param {Document|Element|string} source The XML source.\n   * @return {Object} An object representing the source.\n   * @api\n   */\n  read(source) {\n    if (!source) {\n      return null;\n    }\n    if (typeof source === 'string') {\n      const doc = parse(source);\n      return this.readFromDocument(doc);\n    }\n    if (isDocument(source)) {\n      return this.readFromDocument(/** @type {Document} */ (source));\n    }\n    return this.readFromNode(/** @type {Element} */ (source));\n  }\n\n  /**\n   * @param {Document} doc Document.\n   * @return {Object} Object\n   */\n  readFromDocument(doc) {\n    for (let n = doc.firstChild; n; n = n.nextSibling) {\n      if (n.nodeType == Node.ELEMENT_NODE) {\n        return this.readFromNode(/** @type {Element} */ (n));\n      }\n    }\n    return null;\n  }\n\n  /**\n   * @abstract\n   * @param {Element} node Node.\n   * @return {Object} Object\n   */\n  readFromNode(node) {}\n}\n\nexport default XML;\n","/**\n * @module ol/format/xlink\n */\n\n/**\n * @const\n * @type {string}\n */\nconst NAMESPACE_URI = 'http://www.w3.org/1999/xlink';\n\n/**\n * @param {Element} node Node.\n * @return {string|undefined} href.\n */\nexport function readHref(node) {\n  return node.getAttributeNS(NAMESPACE_URI, 'href');\n}\n","/**\n * @module ol/format/OWS\n */\nimport XML from './XML.js';\nimport {\n  makeObjectPropertyPusher,\n  makeObjectPropertySetter,\n  makeStructureNS,\n  pushParseAndPop,\n} from '../xml.js';\nimport {readHref} from './xlink.js';\nimport {readString} from './xsd.js';\n\n/**\n * @const\n * @type {Array<null|string>}\n */\nconst NAMESPACE_URIS = [null, 'http://www.opengis.net/ows/1.1'];\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'ServiceIdentification': makeObjectPropertySetter(readServiceIdentification),\n  'ServiceProvider': makeObjectPropertySetter(readServiceProvider),\n  'OperationsMetadata': makeObjectPropertySetter(readOperationsMetadata),\n});\n\nclass OWS extends XML {\n  constructor() {\n    super();\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @return {Object} Object\n   */\n  readFromNode(node) {\n    const owsObject = pushParseAndPop({}, PARSERS, node, []);\n    return owsObject ? owsObject : null;\n  }\n}\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst ADDRESS_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'DeliveryPoint': makeObjectPropertySetter(readString),\n  'City': makeObjectPropertySetter(readString),\n  'AdministrativeArea': makeObjectPropertySetter(readString),\n  'PostalCode': makeObjectPropertySetter(readString),\n  'Country': makeObjectPropertySetter(readString),\n  'ElectronicMailAddress': makeObjectPropertySetter(readString),\n});\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst ALLOWED_VALUES_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'Value': makeObjectPropertyPusher(readValue),\n});\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst CONSTRAINT_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'AllowedValues': makeObjectPropertySetter(readAllowedValues),\n});\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst CONTACT_INFO_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'Phone': makeObjectPropertySetter(readPhone),\n  'Address': makeObjectPropertySetter(readAddress),\n});\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst DCP_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'HTTP': makeObjectPropertySetter(readHttp),\n});\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst HTTP_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'Get': makeObjectPropertyPusher(readGet),\n  'Post': undefined, // TODO\n});\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst OPERATION_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'DCP': makeObjectPropertySetter(readDcp),\n});\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst OPERATIONS_METADATA_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'Operation': readOperation,\n});\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst PHONE_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'Voice': makeObjectPropertySetter(readString),\n  'Facsimile': makeObjectPropertySetter(readString),\n});\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst REQUEST_METHOD_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'Constraint': makeObjectPropertyPusher(readConstraint),\n});\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst SERVICE_CONTACT_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'IndividualName': makeObjectPropertySetter(readString),\n  'PositionName': makeObjectPropertySetter(readString),\n  'ContactInfo': makeObjectPropertySetter(readContactInfo),\n});\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst SERVICE_IDENTIFICATION_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'Abstract': makeObjectPropertySetter(readString),\n  'AccessConstraints': makeObjectPropertySetter(readString),\n  'Fees': makeObjectPropertySetter(readString),\n  'Title': makeObjectPropertySetter(readString),\n  'ServiceTypeVersion': makeObjectPropertySetter(readString),\n  'ServiceType': makeObjectPropertySetter(readString),\n});\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst SERVICE_PROVIDER_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'ProviderName': makeObjectPropertySetter(readString),\n  'ProviderSite': makeObjectPropertySetter(readHref),\n  'ServiceContact': makeObjectPropertySetter(readServiceContact),\n});\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {Object|undefined} The address.\n */\nfunction readAddress(node, objectStack) {\n  return pushParseAndPop({}, ADDRESS_PARSERS, node, objectStack);\n}\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {Object|undefined} The values.\n */\nfunction readAllowedValues(node, objectStack) {\n  return pushParseAndPop({}, ALLOWED_VALUES_PARSERS, node, objectStack);\n}\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {Object|undefined} The constraint.\n */\nfunction readConstraint(node, objectStack) {\n  const name = node.getAttribute('name');\n  if (!name) {\n    return undefined;\n  }\n  return pushParseAndPop({'name': name}, CONSTRAINT_PARSERS, node, objectStack);\n}\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {Object|undefined} The contact info.\n */\nfunction readContactInfo(node, objectStack) {\n  return pushParseAndPop({}, CONTACT_INFO_PARSERS, node, objectStack);\n}\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {Object|undefined} The DCP.\n */\nfunction readDcp(node, objectStack) {\n  return pushParseAndPop({}, DCP_PARSERS, node, objectStack);\n}\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {Object|undefined} The GET object.\n */\nfunction readGet(node, objectStack) {\n  const href = readHref(node);\n  if (!href) {\n    return undefined;\n  }\n  return pushParseAndPop(\n    {'href': href},\n    REQUEST_METHOD_PARSERS,\n    node,\n    objectStack\n  );\n}\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {Object|undefined} The HTTP object.\n */\nfunction readHttp(node, objectStack) {\n  return pushParseAndPop({}, HTTP_PARSERS, node, objectStack);\n}\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {Object|undefined} The operation.\n */\nfunction readOperation(node, objectStack) {\n  const name = node.getAttribute('name');\n  const value = pushParseAndPop({}, OPERATION_PARSERS, node, objectStack);\n  if (!value) {\n    return undefined;\n  }\n  const object = /** @type {Object} */ (objectStack[objectStack.length - 1]);\n  object[name] = value;\n}\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {Object|undefined} The operations metadata.\n */\nfunction readOperationsMetadata(node, objectStack) {\n  return pushParseAndPop({}, OPERATIONS_METADATA_PARSERS, node, objectStack);\n}\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {Object|undefined} The phone.\n */\nfunction readPhone(node, objectStack) {\n  return pushParseAndPop({}, PHONE_PARSERS, node, objectStack);\n}\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {Object|undefined} The service identification.\n */\nfunction readServiceIdentification(node, objectStack) {\n  return pushParseAndPop({}, SERVICE_IDENTIFICATION_PARSERS, node, objectStack);\n}\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {Object|undefined} The service contact.\n */\nfunction readServiceContact(node, objectStack) {\n  return pushParseAndPop({}, SERVICE_CONTACT_PARSERS, node, objectStack);\n}\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {Object|undefined} The service provider.\n */\nfunction readServiceProvider(node, objectStack) {\n  return pushParseAndPop({}, SERVICE_PROVIDER_PARSERS, node, objectStack);\n}\n\n/**\n * @param {Node} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {string|undefined} The value.\n */\nfunction readValue(node, objectStack) {\n  return readString(node);\n}\n\nexport default OWS;\n","/**\n * @module ol/format/Polyline\n */\nimport Feature from '../Feature.js';\nimport LineString from '../geom/LineString.js';\nimport TextFeature from './TextFeature.js';\nimport {assert} from '../asserts.js';\nimport {flipXY} from '../geom/flat/flip.js';\nimport {get as getProjection} from '../proj.js';\nimport {getStrideForLayout} from '../geom/SimpleGeometry.js';\nimport {inflateCoordinates} from '../geom/flat/inflate.js';\nimport {transformGeometryWithOptions} from './Feature.js';\n\n/**\n * @typedef {Object} Options\n * @property {number} [factor=1e5] The factor by which the coordinates values will be scaled.\n * @property {import(\"../geom/Geometry.js\").GeometryLayout} [geometryLayout='XY'] Layout of the\n * feature geometries created by the format reader.\n */\n\n/**\n * @classdesc\n * Feature format for reading and writing data in the Encoded\n * Polyline Algorithm Format.\n *\n * When reading features, the coordinates are assumed to be in two dimensions\n * and in [latitude, longitude] order.\n *\n * As Polyline sources contain a single feature,\n * {@link module:ol/format/Polyline~Polyline#readFeatures} will return the\n * feature in an array.\n *\n * @api\n */\nclass Polyline extends TextFeature {\n  /**\n   * @param {Options} [options] Optional configuration object.\n   */\n  constructor(options) {\n    super();\n\n    options = options ? options : {};\n\n    /**\n     * @type {import(\"../proj/Projection.js\").default}\n     */\n    this.dataProjection = getProjection('EPSG:4326');\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.factor_ = options.factor ? options.factor : 1e5;\n\n    /**\n     * @private\n     * @type {import(\"../geom/Geometry.js\").GeometryLayout}\n     */\n    this.geometryLayout_ = options.geometryLayout\n      ? options.geometryLayout\n      : 'XY';\n  }\n\n  /**\n   * @protected\n   * @param {string} text Text.\n   * @param {import(\"./Feature.js\").ReadOptions} [options] Read options.\n   * @return {import(\"../Feature.js\").default} Feature.\n   */\n  readFeatureFromText(text, options) {\n    const geometry = this.readGeometryFromText(text, options);\n    return new Feature(geometry);\n  }\n\n  /**\n   * @param {string} text Text.\n   * @param {import(\"./Feature.js\").ReadOptions} [options] Read options.\n   * @protected\n   * @return {Array<Feature>} Features.\n   */\n  readFeaturesFromText(text, options) {\n    const feature = this.readFeatureFromText(text, options);\n    return [feature];\n  }\n\n  /**\n   * @param {string} text Text.\n   * @param {import(\"./Feature.js\").ReadOptions} [options] Read options.\n   * @protected\n   * @return {import(\"../geom/Geometry.js\").default} Geometry.\n   */\n  readGeometryFromText(text, options) {\n    const stride = getStrideForLayout(this.geometryLayout_);\n    const flatCoordinates = decodeDeltas(text, stride, this.factor_);\n    flipXY(flatCoordinates, 0, flatCoordinates.length, stride, flatCoordinates);\n    const coordinates = inflateCoordinates(\n      flatCoordinates,\n      0,\n      flatCoordinates.length,\n      stride\n    );\n    const lineString = new LineString(coordinates, this.geometryLayout_);\n\n    return transformGeometryWithOptions(\n      lineString,\n      false,\n      this.adaptOptions(options)\n    );\n  }\n\n  /**\n   * @param {import(\"../Feature.js\").default<LineString>} feature Features.\n   * @param {import(\"./Feature.js\").WriteOptions} [options] Write options.\n   * @protected\n   * @return {string} Text.\n   */\n  writeFeatureText(feature, options) {\n    const geometry = feature.getGeometry();\n    if (geometry) {\n      return this.writeGeometryText(geometry, options);\n    }\n    assert(false, 40); // Expected `feature` to have a geometry\n    return '';\n  }\n\n  /**\n   * @param {Array<import(\"../Feature.js\").default<LineString>>} features Features.\n   * @param {import(\"./Feature.js\").WriteOptions} [options] Write options.\n   * @protected\n   * @return {string} Text.\n   */\n  writeFeaturesText(features, options) {\n    return this.writeFeatureText(features[0], options);\n  }\n\n  /**\n   * @param {LineString} geometry Geometry.\n   * @param {import(\"./Feature.js\").WriteOptions} [options] Write options.\n   * @protected\n   * @return {string} Text.\n   */\n  writeGeometryText(geometry, options) {\n    geometry =\n      /** @type {LineString} */\n      (\n        transformGeometryWithOptions(geometry, true, this.adaptOptions(options))\n      );\n    const flatCoordinates = geometry.getFlatCoordinates();\n    const stride = geometry.getStride();\n    flipXY(flatCoordinates, 0, flatCoordinates.length, stride, flatCoordinates);\n    return encodeDeltas(flatCoordinates, stride, this.factor_);\n  }\n}\n\n/**\n * Encode a list of n-dimensional points and return an encoded string\n *\n * Attention: This function will modify the passed array!\n *\n * @param {Array<number>} numbers A list of n-dimensional points.\n * @param {number} stride The number of dimension of the points in the list.\n * @param {number} [factor] The factor by which the numbers will be\n *     multiplied. The remaining decimal places will get rounded away.\n *     Default is `1e5`.\n * @return {string} The encoded string.\n * @api\n */\nexport function encodeDeltas(numbers, stride, factor) {\n  factor = factor ? factor : 1e5;\n  let d;\n\n  const lastNumbers = new Array(stride);\n  for (d = 0; d < stride; ++d) {\n    lastNumbers[d] = 0;\n  }\n\n  for (let i = 0, ii = numbers.length; i < ii; ) {\n    for (d = 0; d < stride; ++d, ++i) {\n      const num = numbers[i];\n      const delta = num - lastNumbers[d];\n      lastNumbers[d] = num;\n\n      numbers[i] = delta;\n    }\n  }\n\n  return encodeFloats(numbers, factor);\n}\n\n/**\n * Decode a list of n-dimensional points from an encoded string\n *\n * @param {string} encoded An encoded string.\n * @param {number} stride The number of dimension of the points in the\n *     encoded string.\n * @param {number} [factor] The factor by which the resulting numbers will\n *     be divided. Default is `1e5`.\n * @return {Array<number>} A list of n-dimensional points.\n * @api\n */\nexport function decodeDeltas(encoded, stride, factor) {\n  factor = factor ? factor : 1e5;\n  let d;\n\n  /** @type {Array<number>} */\n  const lastNumbers = new Array(stride);\n  for (d = 0; d < stride; ++d) {\n    lastNumbers[d] = 0;\n  }\n\n  const numbers = decodeFloats(encoded, factor);\n\n  for (let i = 0, ii = numbers.length; i < ii; ) {\n    for (d = 0; d < stride; ++d, ++i) {\n      lastNumbers[d] += numbers[i];\n\n      numbers[i] = lastNumbers[d];\n    }\n  }\n\n  return numbers;\n}\n\n/**\n * Encode a list of floating point numbers and return an encoded string\n *\n * Attention: This function will modify the passed array!\n *\n * @param {Array<number>} numbers A list of floating point numbers.\n * @param {number} [factor] The factor by which the numbers will be\n *     multiplied. The remaining decimal places will get rounded away.\n *     Default is `1e5`.\n * @return {string} The encoded string.\n * @api\n */\nexport function encodeFloats(numbers, factor) {\n  factor = factor ? factor : 1e5;\n  for (let i = 0, ii = numbers.length; i < ii; ++i) {\n    numbers[i] = Math.round(numbers[i] * factor);\n  }\n\n  return encodeSignedIntegers(numbers);\n}\n\n/**\n * Decode a list of floating point numbers from an encoded string\n *\n * @param {string} encoded An encoded string.\n * @param {number} [factor] The factor by which the result will be divided.\n *     Default is `1e5`.\n * @return {Array<number>} A list of floating point numbers.\n * @api\n */\nexport function decodeFloats(encoded, factor) {\n  factor = factor ? factor : 1e5;\n  const numbers = decodeSignedIntegers(encoded);\n  for (let i = 0, ii = numbers.length; i < ii; ++i) {\n    numbers[i] /= factor;\n  }\n  return numbers;\n}\n\n/**\n * Encode a list of signed integers and return an encoded string\n *\n * Attention: This function will modify the passed array!\n *\n * @param {Array<number>} numbers A list of signed integers.\n * @return {string} The encoded string.\n */\nexport function encodeSignedIntegers(numbers) {\n  for (let i = 0, ii = numbers.length; i < ii; ++i) {\n    const num = numbers[i];\n    numbers[i] = num < 0 ? ~(num << 1) : num << 1;\n  }\n  return encodeUnsignedIntegers(numbers);\n}\n\n/**\n * Decode a list of signed integers from an encoded string\n *\n * @param {string} encoded An encoded string.\n * @return {Array<number>} A list of signed integers.\n */\nexport function decodeSignedIntegers(encoded) {\n  const numbers = decodeUnsignedIntegers(encoded);\n  for (let i = 0, ii = numbers.length; i < ii; ++i) {\n    const num = numbers[i];\n    numbers[i] = num & 1 ? ~(num >> 1) : num >> 1;\n  }\n  return numbers;\n}\n\n/**\n * Encode a list of unsigned integers and return an encoded string\n *\n * @param {Array<number>} numbers A list of unsigned integers.\n * @return {string} The encoded string.\n */\nexport function encodeUnsignedIntegers(numbers) {\n  let encoded = '';\n  for (let i = 0, ii = numbers.length; i < ii; ++i) {\n    encoded += encodeUnsignedInteger(numbers[i]);\n  }\n  return encoded;\n}\n\n/**\n * Decode a list of unsigned integers from an encoded string\n *\n * @param {string} encoded An encoded string.\n * @return {Array<number>} A list of unsigned integers.\n */\nexport function decodeUnsignedIntegers(encoded) {\n  const numbers = [];\n  let current = 0;\n  let shift = 0;\n  for (let i = 0, ii = encoded.length; i < ii; ++i) {\n    const b = encoded.charCodeAt(i) - 63;\n    current |= (b & 0x1f) << shift;\n    if (b < 0x20) {\n      numbers.push(current);\n      current = 0;\n      shift = 0;\n    } else {\n      shift += 5;\n    }\n  }\n  return numbers;\n}\n\n/**\n * Encode one single unsigned integer and return an encoded string\n *\n * @param {number} num Unsigned integer that should be encoded.\n * @return {string} The encoded string.\n */\nexport function encodeUnsignedInteger(num) {\n  let value,\n    encoded = '';\n  while (num >= 0x20) {\n    value = (0x20 | (num & 0x1f)) + 63;\n    encoded += String.fromCharCode(value);\n    num >>= 5;\n  }\n  value = num + 63;\n  encoded += String.fromCharCode(value);\n  return encoded;\n}\n\nexport default Polyline;\n","/**\n * @module ol/format/TopoJSON\n */\nimport Feature from '../Feature.js';\nimport JSONFeature from './JSONFeature.js';\nimport LineString from '../geom/LineString.js';\nimport MultiLineString from '../geom/MultiLineString.js';\nimport MultiPoint from '../geom/MultiPoint.js';\nimport MultiPolygon from '../geom/MultiPolygon.js';\nimport Point from '../geom/Point.js';\nimport Polygon from '../geom/Polygon.js';\nimport {get as getProjection} from '../proj.js';\nimport {transformGeometryWithOptions} from './Feature.js';\n\n/**\n * @typedef {import(\"topojson-specification\").Topology} TopoJSONTopology\n * @typedef {import(\"topojson-specification\").GeometryCollection} TopoJSONGeometryCollection\n * @typedef {import(\"topojson-specification\").GeometryObject} TopoJSONGeometry\n * @typedef {import(\"topojson-specification\").Point} TopoJSONPoint\n * @typedef {import(\"topojson-specification\").MultiPoint} TopoJSONMultiPoint\n * @typedef {import(\"topojson-specification\").LineString} TopoJSONLineString\n * @typedef {import(\"topojson-specification\").MultiLineString} TopoJSONMultiLineString\n * @typedef {import(\"topojson-specification\").Polygon} TopoJSONPolygon\n * @typedef {import(\"topojson-specification\").MultiPolygon} TopoJSONMultiPolygon\n */\n\n/**\n * @typedef {Object} Options\n * @property {import(\"../proj.js\").ProjectionLike} [dataProjection='EPSG:4326'] Default data projection.\n * @property {string} [layerName] Set the name of the TopoJSON topology\n * `objects`'s children as feature property with the specified name. This means\n * that when set to `'layer'`, a topology like\n * ```\n * {\n *   \"type\": \"Topology\",\n *   \"objects\": {\n *     \"example\": {\n *       \"type\": \"GeometryCollection\",\n *       \"geometries\": []\n *     }\n *   }\n * }\n * ```\n * will result in features that have a property `'layer'` set to `'example'`.\n * When not set, no property will be added to features.\n * @property {Array<string>} [layers] Names of the TopoJSON topology's\n * `objects`'s children to read features from.  If not provided, features will\n * be read from all children.\n */\n\n/**\n * @classdesc\n * Feature format for reading data in the TopoJSON format.\n *\n * @api\n */\nclass TopoJSON extends JSONFeature {\n  /**\n   * @param {Options} [options] Options.\n   */\n  constructor(options) {\n    super();\n\n    options = options ? options : {};\n\n    /**\n     * @private\n     * @type {string|undefined}\n     */\n    this.layerName_ = options.layerName;\n\n    /**\n     * @private\n     * @type {?Array<string>}\n     */\n    this.layers_ = options.layers ? options.layers : null;\n\n    /**\n     * @type {import(\"../proj/Projection.js\").default}\n     */\n    this.dataProjection = getProjection(\n      options.dataProjection ? options.dataProjection : 'EPSG:4326'\n    );\n  }\n\n  /**\n   * @param {Object} object Object.\n   * @param {import(\"./Feature.js\").ReadOptions} [options] Read options.\n   * @protected\n   * @return {Array<Feature>} Features.\n   */\n  readFeaturesFromObject(object, options) {\n    if (object.type == 'Topology') {\n      const topoJSONTopology = /** @type {TopoJSONTopology} */ (object);\n      let transform,\n        scale = null,\n        translate = null;\n      if (topoJSONTopology['transform']) {\n        transform = topoJSONTopology['transform'];\n        scale = transform['scale'];\n        translate = transform['translate'];\n      }\n      const arcs = topoJSONTopology['arcs'];\n      if (transform) {\n        transformArcs(arcs, scale, translate);\n      }\n      /** @type {Array<Feature>} */\n      const features = [];\n      const topoJSONFeatures = topoJSONTopology['objects'];\n      const property = this.layerName_;\n      let feature;\n      for (const objectName in topoJSONFeatures) {\n        if (this.layers_ && !this.layers_.includes(objectName)) {\n          continue;\n        }\n        if (topoJSONFeatures[objectName].type === 'GeometryCollection') {\n          feature = /** @type {TopoJSONGeometryCollection} */ (\n            topoJSONFeatures[objectName]\n          );\n          features.push.apply(\n            features,\n            readFeaturesFromGeometryCollection(\n              feature,\n              arcs,\n              scale,\n              translate,\n              property,\n              objectName,\n              options\n            )\n          );\n        } else {\n          feature = /** @type {TopoJSONGeometry} */ (\n            topoJSONFeatures[objectName]\n          );\n          features.push(\n            readFeatureFromGeometry(\n              feature,\n              arcs,\n              scale,\n              translate,\n              property,\n              objectName,\n              options\n            )\n          );\n        }\n      }\n      return features;\n    }\n    return [];\n  }\n\n  /**\n   * @param {Object} object Object.\n   * @protected\n   * @return {import(\"../proj/Projection.js\").default} Projection.\n   */\n  readProjectionFromObject(object) {\n    return this.dataProjection;\n  }\n}\n\n/**\n * @const\n * @type {Object<string, function(TopoJSONGeometry, Array, ...Array=): import(\"../geom/Geometry.js\").default>}\n */\nconst GEOMETRY_READERS = {\n  'Point': readPointGeometry,\n  'LineString': readLineStringGeometry,\n  'Polygon': readPolygonGeometry,\n  'MultiPoint': readMultiPointGeometry,\n  'MultiLineString': readMultiLineStringGeometry,\n  'MultiPolygon': readMultiPolygonGeometry,\n};\n\n/**\n * Concatenate arcs into a coordinate array.\n * @param {Array<number>} indices Indices of arcs to concatenate.  Negative\n *     values indicate arcs need to be reversed.\n * @param {Array<Array<import(\"../coordinate.js\").Coordinate>>} arcs Array of arcs (already\n *     transformed).\n * @return {Array<import(\"../coordinate.js\").Coordinate>} Coordinates array.\n */\nfunction concatenateArcs(indices, arcs) {\n  /** @type {Array<import(\"../coordinate.js\").Coordinate>} */\n  const coordinates = [];\n  let index;\n  for (let i = 0, ii = indices.length; i < ii; ++i) {\n    index = indices[i];\n    if (i > 0) {\n      // splicing together arcs, discard last point\n      coordinates.pop();\n    }\n    if (index >= 0) {\n      // forward arc\n      const arc = arcs[index];\n      for (let j = 0, jj = arc.length; j < jj; ++j) {\n        coordinates.push(arc[j].slice(0));\n      }\n    } else {\n      // reverse arc\n      const arc = arcs[~index];\n      for (let j = arc.length - 1; j >= 0; --j) {\n        coordinates.push(arc[j].slice(0));\n      }\n    }\n  }\n  return coordinates;\n}\n\n/**\n * Create a point from a TopoJSON geometry object.\n *\n * @param {TopoJSONPoint} object TopoJSON object.\n * @param {Array<number>} scale Scale for each dimension.\n * @param {Array<number>} translate Translation for each dimension.\n * @return {Point} Geometry.\n */\nfunction readPointGeometry(object, scale, translate) {\n  const coordinates = object['coordinates'];\n  if (scale && translate) {\n    transformVertex(coordinates, scale, translate);\n  }\n  return new Point(coordinates);\n}\n\n/**\n * Create a multi-point from a TopoJSON geometry object.\n *\n * @param {TopoJSONMultiPoint} object TopoJSON object.\n * @param {Array<number>} scale Scale for each dimension.\n * @param {Array<number>} translate Translation for each dimension.\n * @return {MultiPoint} Geometry.\n */\nfunction readMultiPointGeometry(object, scale, translate) {\n  const coordinates = object['coordinates'];\n  if (scale && translate) {\n    for (let i = 0, ii = coordinates.length; i < ii; ++i) {\n      transformVertex(coordinates[i], scale, translate);\n    }\n  }\n  return new MultiPoint(coordinates);\n}\n\n/**\n * Create a linestring from a TopoJSON geometry object.\n *\n * @param {TopoJSONLineString} object TopoJSON object.\n * @param {Array<Array<import(\"../coordinate.js\").Coordinate>>} arcs Array of arcs.\n * @return {LineString} Geometry.\n */\nfunction readLineStringGeometry(object, arcs) {\n  const coordinates = concatenateArcs(object['arcs'], arcs);\n  return new LineString(coordinates);\n}\n\n/**\n * Create a multi-linestring from a TopoJSON geometry object.\n *\n * @param {TopoJSONMultiLineString} object TopoJSON object.\n * @param {Array<Array<import(\"../coordinate.js\").Coordinate>>} arcs Array of arcs.\n * @return {MultiLineString} Geometry.\n */\nfunction readMultiLineStringGeometry(object, arcs) {\n  const coordinates = [];\n  for (let i = 0, ii = object['arcs'].length; i < ii; ++i) {\n    coordinates[i] = concatenateArcs(object['arcs'][i], arcs);\n  }\n  return new MultiLineString(coordinates);\n}\n\n/**\n * Create a polygon from a TopoJSON geometry object.\n *\n * @param {TopoJSONPolygon} object TopoJSON object.\n * @param {Array<Array<import(\"../coordinate.js\").Coordinate>>} arcs Array of arcs.\n * @return {Polygon} Geometry.\n */\nfunction readPolygonGeometry(object, arcs) {\n  const coordinates = [];\n  for (let i = 0, ii = object['arcs'].length; i < ii; ++i) {\n    coordinates[i] = concatenateArcs(object['arcs'][i], arcs);\n  }\n  return new Polygon(coordinates);\n}\n\n/**\n * Create a multi-polygon from a TopoJSON geometry object.\n *\n * @param {TopoJSONMultiPolygon} object TopoJSON object.\n * @param {Array<Array<import(\"../coordinate.js\").Coordinate>>} arcs Array of arcs.\n * @return {MultiPolygon} Geometry.\n */\nfunction readMultiPolygonGeometry(object, arcs) {\n  const coordinates = [];\n  for (let i = 0, ii = object['arcs'].length; i < ii; ++i) {\n    // for each polygon\n    const polyArray = object['arcs'][i];\n    const ringCoords = [];\n    for (let j = 0, jj = polyArray.length; j < jj; ++j) {\n      // for each ring\n      ringCoords[j] = concatenateArcs(polyArray[j], arcs);\n    }\n    coordinates[i] = ringCoords;\n  }\n  return new MultiPolygon(coordinates);\n}\n\n/**\n * Create features from a TopoJSON GeometryCollection object.\n *\n * @param {TopoJSONGeometryCollection} collection TopoJSON Geometry\n *     object.\n * @param {Array<Array<import(\"../coordinate.js\").Coordinate>>} arcs Array of arcs.\n * @param {Array<number>} scale Scale for each dimension.\n * @param {Array<number>} translate Translation for each dimension.\n * @param {string|undefined} property Property to set the `GeometryCollection`'s parent\n *     object to.\n * @param {string} name Name of the `Topology`'s child object.\n * @param {import(\"./Feature.js\").ReadOptions} [options] Read options.\n * @return {Array<Feature>} Array of features.\n */\nfunction readFeaturesFromGeometryCollection(\n  collection,\n  arcs,\n  scale,\n  translate,\n  property,\n  name,\n  options\n) {\n  const geometries = collection['geometries'];\n  const features = [];\n  for (let i = 0, ii = geometries.length; i < ii; ++i) {\n    features[i] = readFeatureFromGeometry(\n      geometries[i],\n      arcs,\n      scale,\n      translate,\n      property,\n      name,\n      options\n    );\n  }\n  return features;\n}\n\n/**\n * Create a feature from a TopoJSON geometry object.\n *\n * @param {TopoJSONGeometry} object TopoJSON geometry object.\n * @param {Array<Array<import(\"../coordinate.js\").Coordinate>>} arcs Array of arcs.\n * @param {Array<number>} scale Scale for each dimension.\n * @param {Array<number>} translate Translation for each dimension.\n * @param {string|undefined} property Property to set the `GeometryCollection`'s parent\n *     object to.\n * @param {string} name Name of the `Topology`'s child object.\n * @param {import(\"./Feature.js\").ReadOptions} [options] Read options.\n * @return {Feature} Feature.\n */\nfunction readFeatureFromGeometry(\n  object,\n  arcs,\n  scale,\n  translate,\n  property,\n  name,\n  options\n) {\n  let geometry = null;\n  const type = object.type;\n  if (type) {\n    const geometryReader = GEOMETRY_READERS[type];\n    if (type === 'Point' || type === 'MultiPoint') {\n      geometry = geometryReader(object, scale, translate);\n    } else {\n      geometry = geometryReader(object, arcs);\n    }\n    geometry = transformGeometryWithOptions(geometry, false, options);\n  }\n  const feature = new Feature({geometry: geometry});\n  if (object.id !== undefined) {\n    feature.setId(object.id);\n  }\n  let properties = object.properties;\n  if (property) {\n    if (!properties) {\n      properties = {};\n    }\n    properties[property] = name;\n  }\n  if (properties) {\n    feature.setProperties(properties, true);\n  }\n  return feature;\n}\n\n/**\n * Apply a linear transform to array of arcs.  The provided array of arcs is\n * modified in place.\n *\n * @param {Array<Array<import(\"../coordinate.js\").Coordinate>>} arcs Array of arcs.\n * @param {Array<number>} scale Scale for each dimension.\n * @param {Array<number>} translate Translation for each dimension.\n */\nfunction transformArcs(arcs, scale, translate) {\n  for (let i = 0, ii = arcs.length; i < ii; ++i) {\n    transformArc(arcs[i], scale, translate);\n  }\n}\n\n/**\n * Apply a linear transform to an arc.  The provided arc is modified in place.\n *\n * @param {Array<import(\"../coordinate.js\").Coordinate>} arc Arc.\n * @param {Array<number>} scale Scale for each dimension.\n * @param {Array<number>} translate Translation for each dimension.\n */\nfunction transformArc(arc, scale, translate) {\n  let x = 0;\n  let y = 0;\n  for (let i = 0, ii = arc.length; i < ii; ++i) {\n    const vertex = arc[i];\n    x += vertex[0];\n    y += vertex[1];\n    vertex[0] = x;\n    vertex[1] = y;\n    transformVertex(vertex, scale, translate);\n  }\n}\n\n/**\n * Apply a linear transform to a vertex.  The provided vertex is modified in\n * place.\n *\n * @param {import(\"../coordinate.js\").Coordinate} vertex Vertex.\n * @param {Array<number>} scale Scale for each dimension.\n * @param {Array<number>} translate Translation for each dimension.\n */\nfunction transformVertex(vertex, scale, translate) {\n  vertex[0] = vertex[0] * scale[0] + translate[0];\n  vertex[1] = vertex[1] * scale[1] + translate[1];\n}\n\nexport default TopoJSON;\n","/**\n * @module ol/format/filter/Filter\n */\n\n/**\n * @classdesc\n * Abstract class; normally only used for creating subclasses and not instantiated in apps.\n * Base class for WFS GetFeature filters.\n *\n * @abstract\n */\nclass Filter {\n  /**\n   * @param {!string} tagName The XML tag name for this filter.\n   */\n  constructor(tagName) {\n    /**\n     * @private\n     * @type {!string}\n     */\n    this.tagName_ = tagName;\n  }\n\n  /**\n   * The XML tag name for a filter.\n   * @return {!string} Name.\n   */\n  getTagName() {\n    return this.tagName_;\n  }\n}\n\nexport default Filter;\n","/**\n * @module ol/format/filter/LogicalNary\n */\nimport Filter from './Filter.js';\nimport {assert} from '../../asserts.js';\n\n/**\n * @classdesc\n * Abstract class; normally only used for creating subclasses and not instantiated in apps.\n * Base class for WFS GetFeature n-ary logical filters.\n *\n * @abstract\n */\nclass LogicalNary extends Filter {\n  /**\n   * @param {!string} tagName The XML tag name for this filter.\n   * @param {Array<import(\"./Filter.js\").default>} conditions Conditions.\n   */\n  constructor(tagName, conditions) {\n    super(tagName);\n\n    /**\n     * @type {Array<import(\"./Filter.js\").default>}\n     */\n    this.conditions = conditions;\n    assert(this.conditions.length >= 2, 57); // At least 2 conditions are required.\n  }\n}\n\nexport default LogicalNary;\n","/**\n * @module ol/format/filter/And\n */\nimport LogicalNary from './LogicalNary.js';\n\n/**\n * @classdesc\n * Represents a logical `<And>` operator between two or more filter conditions.\n *\n * @abstract\n */\nclass And extends LogicalNary {\n  /**\n   * @param {...import(\"./Filter.js\").default} conditions Conditions.\n   */\n  constructor(conditions) {\n    super('And', Array.prototype.slice.call(arguments));\n  }\n}\n\nexport default And;\n","/**\n * @module ol/format/filter/Bbox\n */\nimport Filter from './Filter.js';\n\n/**\n * @classdesc\n * Represents a `<BBOX>` operator to test whether a geometry-valued property\n * intersects a fixed bounding box\n *\n * @api\n */\nclass Bbox extends Filter {\n  /**\n   * @param {!string} geometryName Geometry name to use.\n   * @param {!import(\"../../extent.js\").Extent} extent Extent.\n   * @param {string} [srsName] SRS name. No srsName attribute will be set\n   * on geometries when this is not provided.\n   */\n  constructor(geometryName, extent, srsName) {\n    super('BBOX');\n\n    /**\n     * @type {!string}\n     */\n    this.geometryName = geometryName;\n\n    /**\n     * @type {import(\"../../extent.js\").Extent}\n     */\n    this.extent = extent;\n    if (extent.length !== 4) {\n      throw new Error(\n        'Expected an extent with four values ([minX, minY, maxX, maxY])'\n      );\n    }\n\n    /**\n     * @type {string|undefined}\n     */\n    this.srsName = srsName;\n  }\n}\n\nexport default Bbox;\n","/**\n * @module ol/format/filter/Spatial\n */\nimport Filter from './Filter.js';\n\n/**\n * @classdesc\n * Abstract class; normally only used for creating subclasses and not instantiated in apps.\n * Represents a spatial operator to test whether a geometry-valued property\n * relates to a given geometry.\n *\n * @abstract\n */\nclass Spatial extends Filter {\n  /**\n   * @param {!string} tagName The XML tag name for this filter.\n   * @param {!string} geometryName Geometry name to use.\n   * @param {!import(\"../../geom/Geometry.js\").default} geometry Geometry.\n   * @param {string} [srsName] SRS name. No srsName attribute will be\n   *    set on geometries when this is not provided.\n   */\n  constructor(tagName, geometryName, geometry, srsName) {\n    super(tagName);\n\n    /**\n     * @type {!string}\n     */\n    this.geometryName = geometryName || 'the_geom';\n\n    /**\n     * @type {import(\"../../geom/Geometry.js\").default}\n     */\n    this.geometry = geometry;\n\n    /**\n     * @type {string|undefined}\n     */\n    this.srsName = srsName;\n  }\n}\n\nexport default Spatial;\n","/**\n * @module ol/format/filter/Contains\n */\nimport Spatial from './Spatial.js';\n\n/**\n * @classdesc\n * Represents a `<Contains>` operator to test whether a geometry-valued property\n * contains a given geometry.\n * @api\n */\nclass Contains extends Spatial {\n  /**\n   * @param {!string} geometryName Geometry name to use.\n   * @param {!import(\"../../geom/Geometry.js\").default} geometry Geometry.\n   * @param {string} [srsName] SRS name. No srsName attribute will be\n   *    set on geometries when this is not provided.\n   */\n  constructor(geometryName, geometry, srsName) {\n    super('Contains', geometryName, geometry, srsName);\n  }\n}\n\nexport default Contains;\n","/**\n * @module ol/format/filter/DWithin\n */\nimport Spatial from './Spatial.js';\n\n/**\n * @classdesc\n * Represents a `<DWithin>` operator to test whether a geometry-valued property\n * is within a distance to a given geometry.\n * @api\n */\nclass DWithin extends Spatial {\n  /**\n   * @param {!string} geometryName Geometry name to use.\n   * @param {!import(\"../../geom/Geometry.js\").default} geometry Geometry.\n   * @param {!number} distance Distance.\n   * @param {!string} unit Unit.\n   * @param {string} [srsName] SRS name. No srsName attribute will be\n   *    set on geometries when this is not provided.\n   */\n  constructor(geometryName, geometry, distance, unit, srsName) {\n    super('DWithin', geometryName, geometry, srsName);\n\n    /**\n     * @public\n     * @type {!number}\n     */\n    this.distance = distance;\n\n    /**\n     * @public\n     * @type {!string}\n     */\n    this.unit = unit;\n  }\n}\n\nexport default DWithin;\n","/**\n * @module ol/format/filter/Disjoint\n */\nimport Spatial from './Spatial.js';\n\n/**\n * @classdesc\n * Represents a `<Disjoint>` operator to test whether a geometry-valued property\n * is disjoint to a given geometry.\n * @api\n */\nclass Disjoint extends Spatial {\n  /**\n   * @param {!string} geometryName Geometry name to use.\n   * @param {!import(\"../../geom/Geometry.js\").default} geometry Geometry.\n   * @param {string} [srsName] SRS name. No srsName attribute will be\n   *    set on geometries when this is not provided.\n   */\n  constructor(geometryName, geometry, srsName) {\n    super('Disjoint', geometryName, geometry, srsName);\n  }\n}\n\nexport default Disjoint;\n","/**\n * @module ol/format/filter/Comparison\n */\nimport Filter from './Filter.js';\n\n/**\n * @classdesc\n * Abstract class; normally only used for creating subclasses and not instantiated in apps.\n * Base class for WFS GetFeature property comparison filters.\n *\n * @abstract\n */\nclass Comparison extends Filter {\n  /**\n   * @param {!string} tagName The XML tag name for this filter.\n   * @param {!string} propertyName Name of the context property to compare.\n   */\n  constructor(tagName, propertyName) {\n    super(tagName);\n\n    /**\n     * @type {!string}\n     */\n    this.propertyName = propertyName;\n  }\n}\n\nexport default Comparison;\n","/**\n * @module ol/format/filter/During\n */\nimport Comparison from './Comparison.js';\n\n/**\n * @classdesc\n * Represents a `<During>` comparison operator.\n * @api\n */\nclass During extends Comparison {\n  /**\n   * @param {!string} propertyName Name of the context property to compare.\n   * @param {!string} begin The begin date in ISO-8601 format.\n   * @param {!string} end The end date in ISO-8601 format.\n   */\n  constructor(propertyName, begin, end) {\n    super('During', propertyName);\n\n    /**\n     * @type {!string}\n     */\n    this.begin = begin;\n\n    /**\n     * @type {!string}\n     */\n    this.end = end;\n  }\n}\n\nexport default During;\n","/**\n * @module ol/format/filter/ComparisonBinary\n */\nimport Comparison from './Comparison.js';\n\n/**\n * @classdesc\n * Abstract class; normally only used for creating subclasses and not instantiated in apps.\n * Base class for WFS GetFeature property binary comparison filters.\n *\n * @abstract\n */\nclass ComparisonBinary extends Comparison {\n  /**\n   * @param {!string} tagName The XML tag name for this filter.\n   * @param {!string} propertyName Name of the context property to compare.\n   * @param {!(string|number)} expression The value to compare.\n   * @param {boolean} [matchCase] Case-sensitive?\n   */\n  constructor(tagName, propertyName, expression, matchCase) {\n    super(tagName, propertyName);\n\n    /**\n     * @type {!(string|number)}\n     */\n    this.expression = expression;\n\n    /**\n     * @type {boolean|undefined}\n     */\n    this.matchCase = matchCase;\n  }\n}\n\nexport default ComparisonBinary;\n","/**\n * @module ol/format/filter/EqualTo\n */\nimport ComparisonBinary from './ComparisonBinary.js';\n\n/**\n * @classdesc\n * Represents a `<PropertyIsEqualTo>` comparison operator.\n * @api\n */\nclass EqualTo extends ComparisonBinary {\n  /**\n   * @param {!string} propertyName Name of the context property to compare.\n   * @param {!(string|number)} expression The value to compare.\n   * @param {boolean} [matchCase] Case-sensitive?\n   */\n  constructor(propertyName, expression, matchCase) {\n    super('PropertyIsEqualTo', propertyName, expression, matchCase);\n  }\n}\n\nexport default EqualTo;\n","/**\n * @module ol/format/filter/GreaterThan\n */\nimport ComparisonBinary from './ComparisonBinary.js';\n\n/**\n * @classdesc\n * Represents a `<PropertyIsGreaterThan>` comparison operator.\n * @api\n */\nclass GreaterThan extends ComparisonBinary {\n  /**\n   * @param {!string} propertyName Name of the context property to compare.\n   * @param {!number} expression The value to compare.\n   */\n  constructor(propertyName, expression) {\n    super('PropertyIsGreaterThan', propertyName, expression);\n  }\n}\n\nexport default GreaterThan;\n","/**\n * @module ol/format/filter/GreaterThanOrEqualTo\n */\nimport ComparisonBinary from './ComparisonBinary.js';\n\n/**\n * @classdesc\n * Represents a `<PropertyIsGreaterThanOrEqualTo>` comparison operator.\n * @api\n */\nclass GreaterThanOrEqualTo extends ComparisonBinary {\n  /**\n   * @param {!string} propertyName Name of the context property to compare.\n   * @param {!number} expression The value to compare.\n   */\n  constructor(propertyName, expression) {\n    super('PropertyIsGreaterThanOrEqualTo', propertyName, expression);\n  }\n}\n\nexport default GreaterThanOrEqualTo;\n","/**\n * @module ol/format/filter/Intersects\n */\nimport Spatial from './Spatial.js';\n\n/**\n * @classdesc\n * Represents a `<Intersects>` operator to test whether a geometry-valued property\n * intersects a given geometry.\n * @api\n */\nclass Intersects extends Spatial {\n  /**\n   * @param {!string} geometryName Geometry name to use.\n   * @param {!import(\"../../geom/Geometry.js\").default} geometry Geometry.\n   * @param {string} [srsName] SRS name. No srsName attribute will be\n   *    set on geometries when this is not provided.\n   */\n  constructor(geometryName, geometry, srsName) {\n    super('Intersects', geometryName, geometry, srsName);\n  }\n}\n\nexport default Intersects;\n","/**\n * @module ol/format/filter/IsBetween\n */\nimport Comparison from './Comparison.js';\n\n/**\n * @classdesc\n * Represents a `<PropertyIsBetween>` comparison operator.\n * @api\n */\nclass IsBetween extends Comparison {\n  /**\n   * @param {!string} propertyName Name of the context property to compare.\n   * @param {!number} lowerBoundary The lower bound of the range.\n   * @param {!number} upperBoundary The upper bound of the range.\n   */\n  constructor(propertyName, lowerBoundary, upperBoundary) {\n    super('PropertyIsBetween', propertyName);\n\n    /**\n     * @type {!number}\n     */\n    this.lowerBoundary = lowerBoundary;\n\n    /**\n     * @type {!number}\n     */\n    this.upperBoundary = upperBoundary;\n  }\n}\n\nexport default IsBetween;\n","/**\n * @module ol/format/filter/IsLike\n */\nimport Comparison from './Comparison.js';\n\n/**\n * @classdesc\n * Represents a `<PropertyIsLike>` comparison operator.\n * @api\n */\nclass IsLike extends Comparison {\n  /**\n   * [constructor description]\n   * @param {!string} propertyName Name of the context property to compare.\n   * @param {!string} pattern Text pattern.\n   * @param {string} [wildCard] Pattern character which matches any sequence of\n   *    zero or more string characters. Default is '*'.\n   * @param {string} [singleChar] pattern character which matches any single\n   *    string character. Default is '.'.\n   * @param {string} [escapeChar] Escape character which can be used to escape\n   *    the pattern characters. Default is '!'.\n   * @param {boolean} [matchCase] Case-sensitive?\n   */\n  constructor(\n    propertyName,\n    pattern,\n    wildCard,\n    singleChar,\n    escapeChar,\n    matchCase\n  ) {\n    super('PropertyIsLike', propertyName);\n\n    /**\n     * @type {!string}\n     */\n    this.pattern = pattern;\n\n    /**\n     * @type {!string}\n     */\n    this.wildCard = wildCard !== undefined ? wildCard : '*';\n\n    /**\n     * @type {!string}\n     */\n    this.singleChar = singleChar !== undefined ? singleChar : '.';\n\n    /**\n     * @type {!string}\n     */\n    this.escapeChar = escapeChar !== undefined ? escapeChar : '!';\n\n    /**\n     * @type {boolean|undefined}\n     */\n    this.matchCase = matchCase;\n  }\n}\n\nexport default IsLike;\n","/**\n * @module ol/format/filter/IsNull\n */\nimport Comparison from './Comparison.js';\n\n/**\n * @classdesc\n * Represents a `<PropertyIsNull>` comparison operator.\n * @api\n */\nclass IsNull extends Comparison {\n  /**\n   * @param {!string} propertyName Name of the context property to compare.\n   */\n  constructor(propertyName) {\n    super('PropertyIsNull', propertyName);\n  }\n}\n\nexport default IsNull;\n","/**\n * @module ol/format/filter/LessThan\n */\nimport ComparisonBinary from './ComparisonBinary.js';\n\n/**\n * @classdesc\n * Represents a `<PropertyIsLessThan>` comparison operator.\n * @api\n */\nclass LessThan extends ComparisonBinary {\n  /**\n   * @param {!string} propertyName Name of the context property to compare.\n   * @param {!number} expression The value to compare.\n   */\n  constructor(propertyName, expression) {\n    super('PropertyIsLessThan', propertyName, expression);\n  }\n}\n\nexport default LessThan;\n","/**\n * @module ol/format/filter/LessThanOrEqualTo\n */\nimport ComparisonBinary from './ComparisonBinary.js';\n\n/**\n * @classdesc\n * Represents a `<PropertyIsLessThanOrEqualTo>` comparison operator.\n * @api\n */\nclass LessThanOrEqualTo extends ComparisonBinary {\n  /**\n   * @param {!string} propertyName Name of the context property to compare.\n   * @param {!number} expression The value to compare.\n   */\n  constructor(propertyName, expression) {\n    super('PropertyIsLessThanOrEqualTo', propertyName, expression);\n  }\n}\n\nexport default LessThanOrEqualTo;\n","/**\n * @module ol/format/filter/Not\n */\nimport Filter from './Filter.js';\n\n/**\n * @classdesc\n * Represents a logical `<Not>` operator for a filter condition.\n * @api\n */\nclass Not extends Filter {\n  /**\n   * @param {!import(\"./Filter.js\").default} condition Filter condition.\n   */\n  constructor(condition) {\n    super('Not');\n\n    /**\n     * @type {!import(\"./Filter.js\").default}\n     */\n    this.condition = condition;\n  }\n}\n\nexport default Not;\n","/**\n * @module ol/format/filter/NotEqualTo\n */\nimport ComparisonBinary from './ComparisonBinary.js';\n\n/**\n * @classdesc\n * Represents a `<PropertyIsNotEqualTo>` comparison operator.\n * @api\n */\nclass NotEqualTo extends ComparisonBinary {\n  /**\n   * @param {!string} propertyName Name of the context property to compare.\n   * @param {!(string|number)} expression The value to compare.\n   * @param {boolean} [matchCase] Case-sensitive?\n   */\n  constructor(propertyName, expression, matchCase) {\n    super('PropertyIsNotEqualTo', propertyName, expression, matchCase);\n  }\n}\n\nexport default NotEqualTo;\n","/**\n * @module ol/format/filter/Or\n */\nimport LogicalNary from './LogicalNary.js';\n\n/**\n * @classdesc\n * Represents a logical `<Or>` operator between two or more filter conditions.\n * @api\n */\nclass Or extends LogicalNary {\n  /**\n   * @param {...import(\"./Filter.js\").default} conditions Conditions.\n   */\n  constructor(conditions) {\n    super('Or', Array.prototype.slice.call(arguments));\n  }\n}\n\nexport default Or;\n","/**\n * @module ol/format/filter/ResourceId\n */\nimport Filter from './Filter.js';\n\n/**\n * @classdesc\n *\n * @abstract\n */\nclass ResourceId extends Filter {\n  /**\n   * @param {!string} rid Resource ID.\n   */\n  constructor(rid) {\n    super('ResourceId');\n\n    /**\n     * @type {!string}\n     */\n    this.rid = rid;\n  }\n}\n\nexport default ResourceId;\n","/**\n * @module ol/format/filter/Within\n */\nimport Spatial from './Spatial.js';\n\n/**\n * @classdesc\n * Represents a `<Within>` operator to test whether a geometry-valued property\n * is within a given geometry.\n * @api\n */\nclass Within extends Spatial {\n  /**\n   * @param {!string} geometryName Geometry name to use.\n   * @param {!import(\"../../geom/Geometry.js\").default} geometry Geometry.\n   * @param {string} [srsName] SRS name. No srsName attribute will be\n   *    set on geometries when this is not provided.\n   */\n  constructor(geometryName, geometry, srsName) {\n    super('Within', geometryName, geometry, srsName);\n  }\n}\n\nexport default Within;\n","/**\n * @module ol/format/filter\n */\nimport And from './filter/And.js';\nimport Bbox from './filter/Bbox.js';\nimport Contains from './filter/Contains.js';\nimport DWithin from './filter/DWithin.js';\nimport Disjoint from './filter/Disjoint.js';\nimport During from './filter/During.js';\nimport EqualTo from './filter/EqualTo.js';\nimport GreaterThan from './filter/GreaterThan.js';\nimport GreaterThanOrEqualTo from './filter/GreaterThanOrEqualTo.js';\nimport Intersects from './filter/Intersects.js';\nimport IsBetween from './filter/IsBetween.js';\nimport IsLike from './filter/IsLike.js';\nimport IsNull from './filter/IsNull.js';\nimport LessThan from './filter/LessThan.js';\nimport LessThanOrEqualTo from './filter/LessThanOrEqualTo.js';\nimport Not from './filter/Not.js';\nimport NotEqualTo from './filter/NotEqualTo.js';\nimport Or from './filter/Or.js';\nimport ResourceId from './filter/ResourceId.js';\nimport Within from './filter/Within.js';\n\n/**\n * Create a logical `<And>` operator between two or more filter conditions.\n *\n * @param {...import(\"./filter/Filter.js\").default} conditions Filter conditions.\n * @return {!And} `<And>` operator.\n * @api\n */\nexport function and(conditions) {\n  const params = [null].concat(Array.prototype.slice.call(arguments));\n  return new (Function.prototype.bind.apply(And, params))();\n}\n\n/**\n * Create a logical `<Or>` operator between two or more filter conditions.\n *\n * @param {...import(\"./filter/Filter.js\").default} conditions Filter conditions.\n * @return {!Or} `<Or>` operator.\n * @api\n */\nexport function or(conditions) {\n  const params = [null].concat(Array.prototype.slice.call(arguments));\n  return new (Function.prototype.bind.apply(Or, params))();\n}\n\n/**\n * Represents a logical `<Not>` operator for a filter condition.\n *\n * @param {!import(\"./filter/Filter.js\").default} condition Filter condition.\n * @return {!Not} `<Not>` operator.\n * @api\n */\nexport function not(condition) {\n  return new Not(condition);\n}\n\n/**\n * Create a `<BBOX>` operator to test whether a geometry-valued property\n * intersects a fixed bounding box\n *\n * @param {!string} geometryName Geometry name to use.\n * @param {!import(\"../extent.js\").Extent} extent Extent.\n * @param {string} [srsName] SRS name. No srsName attribute will be\n *    set on geometries when this is not provided.\n * @return {!Bbox} `<BBOX>` operator.\n * @api\n */\nexport function bbox(geometryName, extent, srsName) {\n  return new Bbox(geometryName, extent, srsName);\n}\n\n/**\n * Create a `<Contains>` operator to test whether a geometry-valued property\n * contains a given geometry.\n *\n * @param {!string} geometryName Geometry name to use.\n * @param {!import(\"../geom/Geometry.js\").default} geometry Geometry.\n * @param {string} [srsName] SRS name. No srsName attribute will be\n *    set on geometries when this is not provided.\n * @return {!Contains} `<Contains>` operator.\n * @api\n */\nexport function contains(geometryName, geometry, srsName) {\n  return new Contains(geometryName, geometry, srsName);\n}\n\n/**\n * Create a `<Intersects>` operator to test whether a geometry-valued property\n * intersects a given geometry.\n *\n * @param {!string} geometryName Geometry name to use.\n * @param {!import(\"../geom/Geometry.js\").default} geometry Geometry.\n * @param {string} [srsName] SRS name. No srsName attribute will be\n *    set on geometries when this is not provided.\n * @return {!Intersects} `<Intersects>` operator.\n * @api\n */\nexport function intersects(geometryName, geometry, srsName) {\n  return new Intersects(geometryName, geometry, srsName);\n}\n\n/**\n * Create a `<Disjoint>` operator to test whether a geometry-valued property\n * is disjoint to a given geometry.\n *\n * @param {!string} geometryName Geometry name to use.\n * @param {!import(\"../geom/Geometry.js\").default} geometry Geometry.\n * @param {string} [srsName] SRS name. No srsName attribute will be\n *    set on geometries when this is not provided.\n * @return {!Disjoint} `<Disjoint>` operator.\n * @api\n */\nexport function disjoint(geometryName, geometry, srsName) {\n  return new Disjoint(geometryName, geometry, srsName);\n}\n\n/**\n * Create a `<Within>` operator to test whether a geometry-valued property\n * is within a given geometry.\n *\n * @param {!string} geometryName Geometry name to use.\n * @param {!import(\"../geom/Geometry.js\").default} geometry Geometry.\n * @param {string} [srsName] SRS name. No srsName attribute will be\n *    set on geometries when this is not provided.\n * @return {!Within} `<Within>` operator.\n * @api\n */\nexport function within(geometryName, geometry, srsName) {\n  return new Within(geometryName, geometry, srsName);\n}\n\n/**\n * Create a `<DWithin>` operator to test whether a geometry-valued property\n * is within a distance to a given geometry.\n *\n * @param {!string} geometryName Geometry name to use.\n * @param {!import(\"../geom/Geometry.js\").default} geometry Geometry.\n * @param {!number} distance Distance.\n * @param {!string} unit Unit.\n * @param {string} [srsName] SRS name. No srsName attribute will be\n *    set on geometries when this is not provided.\n * @return {!DWithin} `<DWithin>` operator.\n * @api\n */\nexport function dwithin(geometryName, geometry, distance, unit, srsName) {\n  return new DWithin(geometryName, geometry, distance, unit, srsName);\n}\n\n/**\n * Creates a `<PropertyIsEqualTo>` comparison operator.\n *\n * @param {!string} propertyName Name of the context property to compare.\n * @param {!(string|number)} expression The value to compare.\n * @param {boolean} [matchCase] Case-sensitive?\n * @return {!EqualTo} `<PropertyIsEqualTo>` operator.\n * @api\n */\nexport function equalTo(propertyName, expression, matchCase) {\n  return new EqualTo(propertyName, expression, matchCase);\n}\n\n/**\n * Creates a `<PropertyIsNotEqualTo>` comparison operator.\n *\n * @param {!string} propertyName Name of the context property to compare.\n * @param {!(string|number)} expression The value to compare.\n * @param {boolean} [matchCase] Case-sensitive?\n * @return {!NotEqualTo} `<PropertyIsNotEqualTo>` operator.\n * @api\n */\nexport function notEqualTo(propertyName, expression, matchCase) {\n  return new NotEqualTo(propertyName, expression, matchCase);\n}\n\n/**\n * Creates a `<PropertyIsLessThan>` comparison operator.\n *\n * @param {!string} propertyName Name of the context property to compare.\n * @param {!number} expression The value to compare.\n * @return {!LessThan} `<PropertyIsLessThan>` operator.\n * @api\n */\nexport function lessThan(propertyName, expression) {\n  return new LessThan(propertyName, expression);\n}\n\n/**\n * Creates a `<PropertyIsLessThanOrEqualTo>` comparison operator.\n *\n * @param {!string} propertyName Name of the context property to compare.\n * @param {!number} expression The value to compare.\n * @return {!LessThanOrEqualTo} `<PropertyIsLessThanOrEqualTo>` operator.\n * @api\n */\nexport function lessThanOrEqualTo(propertyName, expression) {\n  return new LessThanOrEqualTo(propertyName, expression);\n}\n\n/**\n * Creates a `<PropertyIsGreaterThan>` comparison operator.\n *\n * @param {!string} propertyName Name of the context property to compare.\n * @param {!number} expression The value to compare.\n * @return {!GreaterThan} `<PropertyIsGreaterThan>` operator.\n * @api\n */\nexport function greaterThan(propertyName, expression) {\n  return new GreaterThan(propertyName, expression);\n}\n\n/**\n * Creates a `<PropertyIsGreaterThanOrEqualTo>` comparison operator.\n *\n * @param {!string} propertyName Name of the context property to compare.\n * @param {!number} expression The value to compare.\n * @return {!GreaterThanOrEqualTo} `<PropertyIsGreaterThanOrEqualTo>` operator.\n * @api\n */\nexport function greaterThanOrEqualTo(propertyName, expression) {\n  return new GreaterThanOrEqualTo(propertyName, expression);\n}\n\n/**\n * Creates a `<PropertyIsNull>` comparison operator to test whether a property value\n * is null.\n *\n * @param {!string} propertyName Name of the context property to compare.\n * @return {!IsNull} `<PropertyIsNull>` operator.\n * @api\n */\nexport function isNull(propertyName) {\n  return new IsNull(propertyName);\n}\n\n/**\n * Creates a `<PropertyIsBetween>` comparison operator to test whether an expression\n * value lies within a range given by a lower and upper bound (inclusive).\n *\n * @param {!string} propertyName Name of the context property to compare.\n * @param {!number} lowerBoundary The lower bound of the range.\n * @param {!number} upperBoundary The upper bound of the range.\n * @return {!IsBetween} `<PropertyIsBetween>` operator.\n * @api\n */\nexport function between(propertyName, lowerBoundary, upperBoundary) {\n  return new IsBetween(propertyName, lowerBoundary, upperBoundary);\n}\n\n/**\n * Represents a `<PropertyIsLike>` comparison operator that matches a string property\n * value against a text pattern.\n *\n * @param {!string} propertyName Name of the context property to compare.\n * @param {!string} pattern Text pattern.\n * @param {string} [wildCard] Pattern character which matches any sequence of\n *    zero or more string characters. Default is '*'.\n * @param {string} [singleChar] pattern character which matches any single\n *    string character. Default is '.'.\n * @param {string} [escapeChar] Escape character which can be used to escape\n *    the pattern characters. Default is '!'.\n * @param {boolean} [matchCase] Case-sensitive?\n * @return {!IsLike} `<PropertyIsLike>` operator.\n * @api\n */\nexport function like(\n  propertyName,\n  pattern,\n  wildCard,\n  singleChar,\n  escapeChar,\n  matchCase\n) {\n  return new IsLike(\n    propertyName,\n    pattern,\n    wildCard,\n    singleChar,\n    escapeChar,\n    matchCase\n  );\n}\n\n/**\n * Create a `<During>` temporal operator.\n *\n * @param {!string} propertyName Name of the context property to compare.\n * @param {!string} begin The begin date in ISO-8601 format.\n * @param {!string} end The end date in ISO-8601 format.\n * @return {!During} `<During>` operator.\n * @api\n */\nexport function during(propertyName, begin, end) {\n  return new During(propertyName, begin, end);\n}\n\nexport function resourceId(rid) {\n  return new ResourceId(rid);\n}\n","/**\n * @module ol/format/WFS\n */\nimport GML2 from './GML2.js';\nimport GML3 from './GML3.js';\nimport GML32 from './GML32.js';\nimport GMLBase, {GMLNS} from './GMLBase.js';\nimport XMLFeature from './XMLFeature.js';\nimport {\n  XML_SCHEMA_INSTANCE_URI,\n  createElementNS,\n  isDocument,\n  makeArrayPusher,\n  makeChildAppender,\n  makeObjectPropertySetter,\n  makeSimpleNodeFactory,\n  parse,\n  parseNode,\n  pushParseAndPop,\n  pushSerializeAndPop,\n} from '../xml.js';\nimport {and as andFilterFn, bbox as bboxFilterFn} from './filter.js';\nimport {assert} from '../asserts.js';\nimport {get as getProjection} from '../proj.js';\nimport {\n  readNonNegativeIntegerString,\n  readPositiveInteger,\n  writeStringTextNode,\n} from './xsd.js';\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\nconst FEATURE_COLLECTION_PARSERS = {\n  'http://www.opengis.net/gml': {\n    'boundedBy': makeObjectPropertySetter(\n      GMLBase.prototype.readExtentElement,\n      'bounds'\n    ),\n  },\n  'http://www.opengis.net/wfs/2.0': {\n    'member': makeArrayPusher(GMLBase.prototype.readFeaturesInternal),\n  },\n};\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\nconst TRANSACTION_SUMMARY_PARSERS = {\n  'http://www.opengis.net/wfs': {\n    'totalInserted': makeObjectPropertySetter(readPositiveInteger),\n    'totalUpdated': makeObjectPropertySetter(readPositiveInteger),\n    'totalDeleted': makeObjectPropertySetter(readPositiveInteger),\n  },\n  'http://www.opengis.net/wfs/2.0': {\n    'totalInserted': makeObjectPropertySetter(readPositiveInteger),\n    'totalUpdated': makeObjectPropertySetter(readPositiveInteger),\n    'totalDeleted': makeObjectPropertySetter(readPositiveInteger),\n  },\n};\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\nconst TRANSACTION_RESPONSE_PARSERS = {\n  'http://www.opengis.net/wfs': {\n    'TransactionSummary': makeObjectPropertySetter(\n      readTransactionSummary,\n      'transactionSummary'\n    ),\n    'InsertResults': makeObjectPropertySetter(readInsertResults, 'insertIds'),\n  },\n  'http://www.opengis.net/wfs/2.0': {\n    'TransactionSummary': makeObjectPropertySetter(\n      readTransactionSummary,\n      'transactionSummary'\n    ),\n    'InsertResults': makeObjectPropertySetter(readInsertResults, 'insertIds'),\n  },\n};\n\n/**\n * @type {Object<string, Object<string, import(\"../xml.js\").Serializer>>}\n */\nconst QUERY_SERIALIZERS = {\n  'http://www.opengis.net/wfs': {\n    'PropertyName': makeChildAppender(writeStringTextNode),\n  },\n  'http://www.opengis.net/wfs/2.0': {\n    'PropertyName': makeChildAppender(writeStringTextNode),\n  },\n};\n\n/**\n * @type {Object<string, Object<string, import(\"../xml.js\").Serializer>>}\n */\nconst TRANSACTION_SERIALIZERS = {\n  'http://www.opengis.net/wfs': {\n    'Insert': makeChildAppender(writeFeature),\n    'Update': makeChildAppender(writeUpdate),\n    'Delete': makeChildAppender(writeDelete),\n    'Property': makeChildAppender(writeProperty),\n    'Native': makeChildAppender(writeNative),\n  },\n  'http://www.opengis.net/wfs/2.0': {\n    'Insert': makeChildAppender(writeFeature),\n    'Update': makeChildAppender(writeUpdate),\n    'Delete': makeChildAppender(writeDelete),\n    'Property': makeChildAppender(writeProperty),\n    'Native': makeChildAppender(writeNative),\n  },\n};\n\n/**\n * @typedef {Object} Options\n * @property {Object<string, string>|string} [featureNS] The namespace URI used for features.\n * @property {Array<string>|string} [featureType] The feature type to parse. Only used for read operations.\n * @property {GMLBase} [gmlFormat] The GML format to use to parse the response.\n * Default is `ol/format/GML2` for WFS 1.0.0, `ol/format/GML3` for WFS 1.1.0 and `ol/format/GML32` for WFS 2.0.0.\n * @property {string} [schemaLocation] Optional schemaLocation to use for serialization, this will override the default.\n * @property {string} [version='1.1.0'] WFS version to use. Can be either `1.0.0`, `1.1.0` or `2.0.0`.\n */\n\n/**\n * @typedef {Object} WriteGetFeatureOptions\n * @property {string} featureNS The namespace URI used for features.\n * @property {string} featurePrefix The prefix for the feature namespace.\n * @property {Array<string|FeatureType>} featureTypes The feature type names or FeatureType objects to\n * define a unique bbox filter per feature type name (in this case, options `bbox` and `geometryName` are\n * ignored.).\n * @property {string} [srsName] SRS name. No srsName attribute will be set on\n * geometries when this is not provided.\n * @property {string} [handle] Handle.\n * @property {string} [outputFormat] Output format.\n * @property {number} [maxFeatures] Maximum number of features to fetch.\n * @property {string} [geometryName] Geometry name to use in a BBOX filter.\n * @property {Array<string>} [propertyNames] Optional list of property names to serialize.\n * @property {string} [viewParams] viewParams GeoServer vendor parameter.\n * @property {number} [startIndex] Start index to use for WFS paging. This is a\n * WFS 2.0 feature backported to WFS 1.1.0 by some Web Feature Services.\n * @property {number} [count] Number of features to retrieve when paging. This is a\n * WFS 2.0 feature backported to WFS 1.1.0 by some Web Feature Services. Please note that some\n * Web Feature Services have repurposed `maxfeatures` instead.\n * @property {import(\"../extent.js\").Extent} [bbox] Extent to use for the BBOX filter. The `geometryName`\n * option must be set.\n * @property {import(\"./filter/Filter.js\").default} [filter] Filter condition. See\n * {@link module:ol/format/filter} for more information.\n * @property {string} [resultType] Indicates what response should be returned,\n * e.g. `hits` only includes the `numberOfFeatures` attribute in the response and no features.\n */\n\n/**\n * @typedef {Object} FeatureType\n * @property {!string} name The feature type name.\n * @property {!import(\"../extent.js\").Extent} bbox Extent to use for the BBOX filter.\n * @property {!string} geometryName Geometry name to use in the BBOX filter.\n */\n\n/**\n * @typedef {Object} WriteTransactionOptions\n * @property {string} featureNS The namespace URI used for features.\n * @property {string} featurePrefix The prefix for the feature namespace.\n * @property {string} featureType The feature type name.\n * @property {string} [srsName] SRS name. No srsName attribute will be set on\n * geometries when this is not provided.\n * @property {string} [handle] Handle.\n * @property {boolean} [hasZ] Must be set to true if the transaction is for\n * a 3D layer. This will allow the Z coordinate to be included in the transaction.\n * @property {Array<Object>} nativeElements Native elements. Currently not supported.\n * @property {import(\"./GMLBase.js\").Options} [gmlOptions] GML options for the WFS transaction writer.\n * @property {string} [version='1.1.0'] WFS version to use for the transaction. Can be either `1.0.0`, `1.1.0` or `2.0.0`.\n */\n\n/**\n * Number of features; bounds/extent.\n * @typedef {Object} FeatureCollectionMetadata\n * @property {number} numberOfFeatures NumberOfFeatures.\n * @property {import(\"../extent.js\").Extent} bounds Bounds.\n */\n\n/**\n * Total deleted; total inserted; total updated; array of insert ids.\n * @typedef {Object} TransactionResponse\n * @property {number} totalDeleted TotalDeleted.\n * @property {number} totalInserted TotalInserted.\n * @property {number} totalUpdated TotalUpdated.\n * @property {Array<string>} insertIds InsertIds.\n */\n\n/**\n * @type {string}\n */\nconst FEATURE_PREFIX = 'feature';\n\n/**\n * @type {string}\n */\nconst XMLNS = 'http://www.w3.org/2000/xmlns/';\n\n/**\n * @type {Object<string, string>}\n */\nconst OGCNS = {\n  '2.0.0': 'http://www.opengis.net/ogc/1.1',\n  '1.1.0': 'http://www.opengis.net/ogc',\n  '1.0.0': 'http://www.opengis.net/ogc',\n};\n\n/**\n * @type {Object<string, string>}\n */\nconst WFSNS = {\n  '2.0.0': 'http://www.opengis.net/wfs/2.0',\n  '1.1.0': 'http://www.opengis.net/wfs',\n  '1.0.0': 'http://www.opengis.net/wfs',\n};\n\n/**\n * @type {Object<string, string>}\n */\nconst FESNS = {\n  '2.0.0': 'http://www.opengis.net/fes/2.0',\n  '1.1.0': 'http://www.opengis.net/fes',\n  '1.0.0': 'http://www.opengis.net/fes',\n};\n\n/**\n * @type {Object<string, string>}\n */\nconst SCHEMA_LOCATIONS = {\n  '2.0.0':\n    'http://www.opengis.net/wfs/2.0 http://schemas.opengis.net/wfs/2.0/wfs.xsd',\n  '1.1.0':\n    'http://www.opengis.net/wfs http://schemas.opengis.net/wfs/1.1.0/wfs.xsd',\n  '1.0.0':\n    'http://www.opengis.net/wfs http://schemas.opengis.net/wfs/1.0.0/wfs.xsd',\n};\n\n/**\n * @type {Object<string, object>}\n */\nconst GML_FORMATS = {\n  '2.0.0': GML32,\n  '1.1.0': GML3,\n  '1.0.0': GML2,\n};\n\n/**\n * @const\n * @type {string}\n */\nconst DEFAULT_VERSION = '1.1.0';\n\n/**\n * @classdesc\n * Feature format for reading and writing data in the WFS format.\n * By default, supports WFS version 1.1.0. You can pass a GML format\n * as option to override the default.\n * Also see {@link module:ol/format/GMLBase~GMLBase} which is used by this format.\n *\n * @api\n */\nclass WFS extends XMLFeature {\n  /**\n   * @param {Options} [options] Optional configuration object.\n   */\n  constructor(options) {\n    super();\n\n    options = options ? options : {};\n\n    /**\n     * @private\n     * @type {string}\n     */\n    this.version_ = options.version ? options.version : DEFAULT_VERSION;\n\n    /**\n     * @private\n     * @type {Array<string>|string|undefined}\n     */\n    this.featureType_ = options.featureType;\n\n    /**\n     * @private\n     * @type {Object<string, string>|string|undefined}\n     */\n    this.featureNS_ = options.featureNS;\n\n    /**\n     * @private\n     * @type {GMLBase}\n     */\n    this.gmlFormat_ = options.gmlFormat\n      ? options.gmlFormat\n      : new GML_FORMATS[this.version_]();\n\n    /**\n     * @private\n     * @type {string}\n     */\n    this.schemaLocation_ = options.schemaLocation\n      ? options.schemaLocation\n      : SCHEMA_LOCATIONS[this.version_];\n  }\n\n  /**\n   * @return {Array<string>|string|undefined} featureType\n   */\n  getFeatureType() {\n    return this.featureType_;\n  }\n\n  /**\n   * @param {Array<string>|string|undefined} featureType Feature type(s) to parse.\n   */\n  setFeatureType(featureType) {\n    this.featureType_ = featureType;\n  }\n\n  /**\n   * @protected\n   * @param {Element} node Node.\n   * @param {import(\"./Feature.js\").ReadOptions} [options] Options.\n   * @return {Array<import(\"../Feature.js\").default>} Features.\n   */\n  readFeaturesFromNode(node, options) {\n    /** @type {import(\"../xml.js\").NodeStackItem} */\n    const context = {\n      node,\n    };\n    Object.assign(context, {\n      'featureType': this.featureType_,\n      'featureNS': this.featureNS_,\n    });\n\n    Object.assign(context, this.getReadOptions(node, options ? options : {}));\n    const objectStack = [context];\n    let featuresNS;\n    if (this.version_ === '2.0.0') {\n      featuresNS = FEATURE_COLLECTION_PARSERS;\n    } else {\n      featuresNS = this.gmlFormat_.FEATURE_COLLECTION_PARSERS;\n    }\n    let features = pushParseAndPop(\n      [],\n      featuresNS,\n      node,\n      objectStack,\n      this.gmlFormat_\n    );\n    if (!features) {\n      features = [];\n    }\n    return features;\n  }\n\n  /**\n   * Read transaction response of the source.\n   *\n   * @param {Document|Element|Object|string} source Source.\n   * @return {TransactionResponse|undefined} Transaction response.\n   * @api\n   */\n  readTransactionResponse(source) {\n    if (!source) {\n      return undefined;\n    }\n    if (typeof source === 'string') {\n      const doc = parse(source);\n      return this.readTransactionResponseFromDocument(doc);\n    }\n    if (isDocument(source)) {\n      return this.readTransactionResponseFromDocument(\n        /** @type {Document} */ (source)\n      );\n    }\n    return this.readTransactionResponseFromNode(\n      /** @type {Element} */ (source)\n    );\n  }\n\n  /**\n   * Read feature collection metadata of the source.\n   *\n   * @param {Document|Element|Object|string} source Source.\n   * @return {FeatureCollectionMetadata|undefined}\n   *     FeatureCollection metadata.\n   * @api\n   */\n  readFeatureCollectionMetadata(source) {\n    if (!source) {\n      return undefined;\n    }\n    if (typeof source === 'string') {\n      const doc = parse(source);\n      return this.readFeatureCollectionMetadataFromDocument(doc);\n    }\n    if (isDocument(source)) {\n      return this.readFeatureCollectionMetadataFromDocument(\n        /** @type {Document} */ (source)\n      );\n    }\n    return this.readFeatureCollectionMetadataFromNode(\n      /** @type {Element} */ (source)\n    );\n  }\n\n  /**\n   * @param {Document} doc Document.\n   * @return {FeatureCollectionMetadata|undefined}\n   *     FeatureCollection metadata.\n   */\n  readFeatureCollectionMetadataFromDocument(doc) {\n    for (let n = /** @type {Node} */ (doc.firstChild); n; n = n.nextSibling) {\n      if (n.nodeType == Node.ELEMENT_NODE) {\n        return this.readFeatureCollectionMetadataFromNode(\n          /** @type {Element} */ (n)\n        );\n      }\n    }\n    return undefined;\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @return {FeatureCollectionMetadata|undefined}\n   *     FeatureCollection metadata.\n   */\n  readFeatureCollectionMetadataFromNode(node) {\n    const result = {};\n    const value = readNonNegativeIntegerString(\n      node.getAttribute('numberOfFeatures')\n    );\n    result['numberOfFeatures'] = value;\n    return pushParseAndPop(\n      /** @type {FeatureCollectionMetadata} */ (result),\n      FEATURE_COLLECTION_PARSERS,\n      node,\n      [],\n      this.gmlFormat_\n    );\n  }\n\n  /**\n   * @param {Document} doc Document.\n   * @return {TransactionResponse|undefined} Transaction response.\n   */\n  readTransactionResponseFromDocument(doc) {\n    for (let n = /** @type {Node} */ (doc.firstChild); n; n = n.nextSibling) {\n      if (n.nodeType == Node.ELEMENT_NODE) {\n        return this.readTransactionResponseFromNode(/** @type {Element} */ (n));\n      }\n    }\n    return undefined;\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @return {TransactionResponse|undefined} Transaction response.\n   */\n  readTransactionResponseFromNode(node) {\n    return pushParseAndPop(\n      /** @type {TransactionResponse} */ ({}),\n      TRANSACTION_RESPONSE_PARSERS,\n      node,\n      []\n    );\n  }\n\n  /**\n   * Encode format as WFS `GetFeature` and return the Node.\n   *\n   * @param {WriteGetFeatureOptions} options Options.\n   * @return {Node} Result.\n   * @api\n   */\n  writeGetFeature(options) {\n    const node = createElementNS(WFSNS[this.version_], 'GetFeature');\n    node.setAttribute('service', 'WFS');\n    node.setAttribute('version', this.version_);\n    if (options.handle) {\n      node.setAttribute('handle', options.handle);\n    }\n    if (options.outputFormat) {\n      node.setAttribute('outputFormat', options.outputFormat);\n    }\n    if (options.maxFeatures !== undefined) {\n      node.setAttribute('maxFeatures', String(options.maxFeatures));\n    }\n    if (options.resultType) {\n      node.setAttribute('resultType', options.resultType);\n    }\n    if (options.startIndex !== undefined) {\n      node.setAttribute('startIndex', String(options.startIndex));\n    }\n    if (options.count !== undefined) {\n      node.setAttribute('count', String(options.count));\n    }\n    if (options.viewParams !== undefined) {\n      node.setAttribute('viewParams', options.viewParams);\n    }\n    node.setAttributeNS(\n      XML_SCHEMA_INSTANCE_URI,\n      'xsi:schemaLocation',\n      this.schemaLocation_\n    );\n    /** @type {import(\"../xml.js\").NodeStackItem} */\n    const context = {\n      node,\n    };\n    Object.assign(context, {\n      'version': this.version_,\n      'srsName': options.srsName,\n      'featureNS': options.featureNS ? options.featureNS : this.featureNS_,\n      'featurePrefix': options.featurePrefix,\n      'propertyNames': options.propertyNames ? options.propertyNames : [],\n    });\n    assert(Array.isArray(options.featureTypes), 11); // `options.featureTypes` must be an Array\n    if (typeof options.featureTypes[0] === 'string') {\n      let filter = options.filter;\n      if (options.bbox) {\n        assert(options.geometryName, 12); // `options.geometryName` must also be provided when `options.bbox` is set\n        filter = this.combineBboxAndFilter(\n          options.geometryName,\n          options.bbox,\n          options.srsName,\n          filter\n        );\n      }\n      Object.assign(context, {\n        'geometryName': options.geometryName,\n        'filter': filter,\n      });\n      writeGetFeature(\n        node,\n        /** @type {!Array<string>} */ (options.featureTypes),\n        [context]\n      );\n    } else {\n      // Write one query node per element in featuresType.\n      options.featureTypes.forEach((/** @type {FeatureType} */ featureType) => {\n        const completeFilter = this.combineBboxAndFilter(\n          featureType.geometryName,\n          featureType.bbox,\n          options.srsName,\n          options.filter\n        );\n        Object.assign(context, {\n          'geometryName': featureType.geometryName,\n          'filter': completeFilter,\n        });\n        writeGetFeature(node, [featureType.name], [context]);\n      });\n    }\n    return node;\n  }\n\n  /**\n   * Create a bbox filter and combine it with another optional filter.\n   *\n   * @param {!string} geometryName Geometry name to use.\n   * @param {!import(\"../extent.js\").Extent} extent Extent.\n   * @param {string} [srsName] SRS name. No srsName attribute will be\n   *    set on geometries when this is not provided.\n   * @param {import(\"./filter/Filter.js\").default} [filter] Filter condition.\n   * @return {import(\"./filter/Filter.js\").default} The filter.\n   */\n  combineBboxAndFilter(geometryName, extent, srsName, filter) {\n    const bboxFilter = bboxFilterFn(geometryName, extent, srsName);\n    if (filter) {\n      // if bbox and filter are both set, combine the two into a single filter\n      return andFilterFn(filter, bboxFilter);\n    }\n    return bboxFilter;\n  }\n\n  /**\n   * Encode format as WFS `Transaction` and return the Node.\n   *\n   * @param {Array<import(\"../Feature.js\").default>} inserts The features to insert.\n   * @param {Array<import(\"../Feature.js\").default>} updates The features to update.\n   * @param {Array<import(\"../Feature.js\").default>} deletes The features to delete.\n   * @param {WriteTransactionOptions} options Write options.\n   * @return {Node} Result.\n   * @api\n   */\n  writeTransaction(inserts, updates, deletes, options) {\n    const objectStack = [];\n    const version = options.version ? options.version : this.version_;\n    const node = createElementNS(WFSNS[version], 'Transaction');\n\n    node.setAttribute('service', 'WFS');\n    node.setAttribute('version', version);\n    let baseObj;\n    /** @type {import(\"../xml.js\").NodeStackItem} */\n    if (options) {\n      baseObj = options.gmlOptions ? options.gmlOptions : {};\n      if (options.handle) {\n        node.setAttribute('handle', options.handle);\n      }\n    }\n    node.setAttributeNS(\n      XML_SCHEMA_INSTANCE_URI,\n      'xsi:schemaLocation',\n      SCHEMA_LOCATIONS[version]\n    );\n\n    const request = createTransactionRequest(node, baseObj, version, options);\n    if (inserts) {\n      serializeTransactionRequest('Insert', inserts, objectStack, request);\n    }\n    if (updates) {\n      serializeTransactionRequest('Update', updates, objectStack, request);\n    }\n    if (deletes) {\n      serializeTransactionRequest('Delete', deletes, objectStack, request);\n    }\n    if (options.nativeElements) {\n      serializeTransactionRequest(\n        'Native',\n        options.nativeElements,\n        objectStack,\n        request\n      );\n    }\n    return node;\n  }\n\n  /**\n   * @param {Document} doc Document.\n   * @return {import(\"../proj/Projection.js\").default} Projection.\n   */\n  readProjectionFromDocument(doc) {\n    for (let n = doc.firstChild; n; n = n.nextSibling) {\n      if (n.nodeType == Node.ELEMENT_NODE) {\n        return this.readProjectionFromNode(/** @type {Element} */ (n));\n      }\n    }\n    return null;\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @return {import(\"../proj/Projection.js\").default} Projection.\n   */\n  readProjectionFromNode(node) {\n    if (node.firstElementChild && node.firstElementChild.firstElementChild) {\n      node = node.firstElementChild.firstElementChild;\n      for (let n = node.firstElementChild; n; n = n.nextElementSibling) {\n        if (\n          !(\n            n.childNodes.length === 0 ||\n            (n.childNodes.length === 1 && n.firstChild.nodeType === 3)\n          )\n        ) {\n          const objectStack = [{}];\n          this.gmlFormat_.readGeometryElement(n, objectStack);\n          return getProjection(objectStack.pop().srsName);\n        }\n      }\n    }\n\n    return null;\n  }\n}\n\n/**\n * @param {Element} node Node.\n * @param {*} baseObj Base object.\n * @param {string} version Version.\n * @param {WriteTransactionOptions} options Options.\n * @return {Object} Request object.\n */\nfunction createTransactionRequest(node, baseObj, version, options) {\n  const featurePrefix = options.featurePrefix\n    ? options.featurePrefix\n    : FEATURE_PREFIX;\n  let gmlVersion;\n  if (version === '1.0.0') {\n    gmlVersion = 2;\n  } else if (version === '1.1.0') {\n    gmlVersion = 3;\n  } else if (version === '2.0.0') {\n    gmlVersion = 3.2;\n  }\n  const obj = Object.assign(\n    {node},\n    {\n      version,\n      'featureNS': options.featureNS,\n      'featureType': options.featureType,\n      'featurePrefix': featurePrefix,\n      'gmlVersion': gmlVersion,\n      'hasZ': options.hasZ,\n      'srsName': options.srsName,\n    },\n    baseObj\n  );\n  return obj;\n}\n\n/**\n * @param {string} type Request type.\n * @param {Array<import(\"../Feature.js\").default>} features Features.\n * @param {Array<*>} objectStack Object stack.\n * @param {Element} request Transaction Request.\n */\nfunction serializeTransactionRequest(type, features, objectStack, request) {\n  pushSerializeAndPop(\n    request,\n    TRANSACTION_SERIALIZERS,\n    makeSimpleNodeFactory(type),\n    features,\n    objectStack\n  );\n}\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {Object|undefined} Transaction Summary.\n */\nfunction readTransactionSummary(node, objectStack) {\n  return pushParseAndPop({}, TRANSACTION_SUMMARY_PARSERS, node, objectStack);\n}\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\nconst OGC_FID_PARSERS = {\n  'http://www.opengis.net/ogc': {\n    'FeatureId': makeArrayPusher(function (node, objectStack) {\n      return node.getAttribute('fid');\n    }),\n  },\n  'http://www.opengis.net/ogc/1.1': {\n    'FeatureId': makeArrayPusher(function (node, objectStack) {\n      return node.getAttribute('fid');\n    }),\n  },\n};\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n */\nfunction fidParser(node, objectStack) {\n  parseNode(OGC_FID_PARSERS, node, objectStack);\n}\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\nconst INSERT_RESULTS_PARSERS = {\n  'http://www.opengis.net/wfs': {\n    'Feature': fidParser,\n  },\n  'http://www.opengis.net/wfs/2.0': {\n    'Feature': fidParser,\n  },\n};\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {Array<string>|undefined} Insert results.\n */\nfunction readInsertResults(node, objectStack) {\n  return pushParseAndPop([], INSERT_RESULTS_PARSERS, node, objectStack);\n}\n\n/**\n * @param {Element} node Node.\n * @param {import(\"../Feature.js\").default} feature Feature.\n * @param {Array<*>} objectStack Node stack.\n */\nfunction writeFeature(node, feature, objectStack) {\n  const context = objectStack[objectStack.length - 1];\n  const featureType = context['featureType'];\n  const featureNS = context['featureNS'];\n  const gmlVersion = context['gmlVersion'];\n  const child = createElementNS(featureNS, featureType);\n  node.appendChild(child);\n  if (gmlVersion === 2) {\n    GML2.prototype.writeFeatureElement(child, feature, objectStack);\n  } else if (gmlVersion === 3) {\n    GML3.prototype.writeFeatureElement(child, feature, objectStack);\n  } else {\n    GML32.prototype.writeFeatureElement(child, feature, objectStack);\n  }\n}\n\n/**\n * @param {Node} node Node.\n * @param {number|string} fid Feature identifier.\n * @param {Array<*>} objectStack Node stack.\n */\nfunction writeOgcFidFilter(node, fid, objectStack) {\n  const context = objectStack[objectStack.length - 1];\n  const version = context['version'];\n  const ns = OGCNS[version];\n  const filter = createElementNS(ns, 'Filter');\n  const child = createElementNS(ns, 'FeatureId');\n  filter.appendChild(child);\n  child.setAttribute('fid', /** @type {string} */ (fid));\n  node.appendChild(filter);\n}\n\n/**\n * @param {string|undefined} featurePrefix The prefix of the feature.\n * @param {string} featureType The type of the feature.\n * @return {string} The value of the typeName property.\n */\nfunction getTypeName(featurePrefix, featureType) {\n  featurePrefix = featurePrefix ? featurePrefix : FEATURE_PREFIX;\n  const prefix = featurePrefix + ':';\n  // The featureType already contains the prefix.\n  if (featureType.startsWith(prefix)) {\n    return featureType;\n  }\n  return prefix + featureType;\n}\n\n/**\n * @param {Element} node Node.\n * @param {import(\"../Feature.js\").default} feature Feature.\n * @param {Array<*>} objectStack Node stack.\n */\nfunction writeDelete(node, feature, objectStack) {\n  const context = objectStack[objectStack.length - 1];\n  assert(feature.getId() !== undefined, 26); // Features must have an id set\n  const featureType = context['featureType'];\n  const featurePrefix = context['featurePrefix'];\n  const featureNS = context['featureNS'];\n  const typeName = getTypeName(featurePrefix, featureType);\n  node.setAttribute('typeName', typeName);\n  node.setAttributeNS(XMLNS, 'xmlns:' + featurePrefix, featureNS);\n  const fid = feature.getId();\n  if (fid !== undefined) {\n    writeOgcFidFilter(node, fid, objectStack);\n  }\n}\n\n/**\n * @param {Element} node Node.\n * @param {import(\"../Feature.js\").default} feature Feature.\n * @param {Array<*>} objectStack Node stack.\n */\nfunction writeUpdate(node, feature, objectStack) {\n  const context = objectStack[objectStack.length - 1];\n  assert(feature.getId() !== undefined, 27); // Features must have an id set\n  const version = context['version'];\n  const featureType = context['featureType'];\n  const featurePrefix = context['featurePrefix'];\n  const featureNS = context['featureNS'];\n  const typeName = getTypeName(featurePrefix, featureType);\n  const geometryName = feature.getGeometryName();\n  node.setAttribute('typeName', typeName);\n  node.setAttributeNS(XMLNS, 'xmlns:' + featurePrefix, featureNS);\n  const fid = feature.getId();\n  if (fid !== undefined) {\n    const keys = feature.getKeys();\n    const values = [];\n    for (let i = 0, ii = keys.length; i < ii; i++) {\n      const value = feature.get(keys[i]);\n      if (value !== undefined) {\n        let name = keys[i];\n        if (\n          value &&\n          typeof (/** @type {?} */ (value).getSimplifiedGeometry) === 'function'\n        ) {\n          name = geometryName;\n        }\n        values.push({name: name, value: value});\n      }\n    }\n    pushSerializeAndPop(\n      /** @type {import(\"../xml.js\").NodeStackItem} */ ({\n        version,\n        'gmlVersion': context['gmlVersion'],\n        node,\n        'hasZ': context['hasZ'],\n        'srsName': context['srsName'],\n      }),\n      TRANSACTION_SERIALIZERS,\n      makeSimpleNodeFactory('Property'),\n      values,\n      objectStack\n    );\n    writeOgcFidFilter(node, fid, objectStack);\n  }\n}\n\n/**\n * @param {Node} node Node.\n * @param {Object} pair Property name and value.\n * @param {Array<*>} objectStack Node stack.\n */\nfunction writeProperty(node, pair, objectStack) {\n  const context = objectStack[objectStack.length - 1];\n  const version = context['version'];\n  const ns = WFSNS[version];\n  const name = createElementNS(ns, 'Name');\n  const gmlVersion = context['gmlVersion'];\n  node.appendChild(name);\n  writeStringTextNode(name, pair.name);\n  if (pair.value !== undefined && pair.value !== null) {\n    const value = createElementNS(ns, 'Value');\n    node.appendChild(value);\n    if (\n      pair.value &&\n      typeof (/** @type {?} */ (pair.value).getSimplifiedGeometry) ===\n        'function'\n    ) {\n      if (gmlVersion === 2) {\n        GML2.prototype.writeGeometryElement(value, pair.value, objectStack);\n      } else if (gmlVersion === 3) {\n        GML3.prototype.writeGeometryElement(value, pair.value, objectStack);\n      } else {\n        GML32.prototype.writeGeometryElement(value, pair.value, objectStack);\n      }\n    } else {\n      writeStringTextNode(value, pair.value);\n    }\n  }\n}\n\n/**\n * @param {Element} node Node.\n * @param {{vendorId: string, safeToIgnore: boolean, value: string}} nativeElement The native element.\n * @param {Array<*>} objectStack Node stack.\n */\nfunction writeNative(node, nativeElement, objectStack) {\n  if (nativeElement.vendorId) {\n    node.setAttribute('vendorId', nativeElement.vendorId);\n  }\n  if (nativeElement.safeToIgnore !== undefined) {\n    node.setAttribute('safeToIgnore', String(nativeElement.safeToIgnore));\n  }\n  if (nativeElement.value !== undefined) {\n    writeStringTextNode(node, nativeElement.value);\n  }\n}\n\n/**\n * @type {Object<string, Object<string, import(\"../xml.js\").Serializer>>}\n */\nconst GETFEATURE_SERIALIZERS = {\n  'http://www.opengis.net/wfs': {\n    'Query': makeChildAppender(writeQuery),\n  },\n  'http://www.opengis.net/wfs/2.0': {\n    'Query': makeChildAppender(writeQuery),\n  },\n  'http://www.opengis.net/ogc': {\n    'During': makeChildAppender(writeDuringFilter),\n    'And': makeChildAppender(writeLogicalFilter),\n    'Or': makeChildAppender(writeLogicalFilter),\n    'Not': makeChildAppender(writeNotFilter),\n    'BBOX': makeChildAppender(writeBboxFilter),\n    'Contains': makeChildAppender(writeSpatialFilter),\n    'Intersects': makeChildAppender(writeSpatialFilter),\n    'Within': makeChildAppender(writeSpatialFilter),\n    'DWithin': makeChildAppender(writeDWithinFilter),\n    'PropertyIsEqualTo': makeChildAppender(writeComparisonFilter),\n    'PropertyIsNotEqualTo': makeChildAppender(writeComparisonFilter),\n    'PropertyIsLessThan': makeChildAppender(writeComparisonFilter),\n    'PropertyIsLessThanOrEqualTo': makeChildAppender(writeComparisonFilter),\n    'PropertyIsGreaterThan': makeChildAppender(writeComparisonFilter),\n    'PropertyIsGreaterThanOrEqualTo': makeChildAppender(writeComparisonFilter),\n    'PropertyIsNull': makeChildAppender(writeIsNullFilter),\n    'PropertyIsBetween': makeChildAppender(writeIsBetweenFilter),\n    'PropertyIsLike': makeChildAppender(writeIsLikeFilter),\n  },\n  'http://www.opengis.net/fes/2.0': {\n    'During': makeChildAppender(writeDuringFilter),\n    'And': makeChildAppender(writeLogicalFilter),\n    'Or': makeChildAppender(writeLogicalFilter),\n    'Not': makeChildAppender(writeNotFilter),\n    'BBOX': makeChildAppender(writeBboxFilter),\n    'Contains': makeChildAppender(writeSpatialFilter),\n    'Disjoint': makeChildAppender(writeSpatialFilter),\n    'Intersects': makeChildAppender(writeSpatialFilter),\n    'ResourceId': makeChildAppender(writeResourceIdFilter),\n    'Within': makeChildAppender(writeSpatialFilter),\n    'DWithin': makeChildAppender(writeDWithinFilter),\n    'PropertyIsEqualTo': makeChildAppender(writeComparisonFilter),\n    'PropertyIsNotEqualTo': makeChildAppender(writeComparisonFilter),\n    'PropertyIsLessThan': makeChildAppender(writeComparisonFilter),\n    'PropertyIsLessThanOrEqualTo': makeChildAppender(writeComparisonFilter),\n    'PropertyIsGreaterThan': makeChildAppender(writeComparisonFilter),\n    'PropertyIsGreaterThanOrEqualTo': makeChildAppender(writeComparisonFilter),\n    'PropertyIsNull': makeChildAppender(writeIsNullFilter),\n    'PropertyIsBetween': makeChildAppender(writeIsBetweenFilter),\n    'PropertyIsLike': makeChildAppender(writeIsLikeFilter),\n  },\n};\n\n/**\n * @param {Element} node Node.\n * @param {string} featureType Feature type.\n * @param {Array<*>} objectStack Node stack.\n */\nfunction writeQuery(node, featureType, objectStack) {\n  const context = /** @type {Object} */ (objectStack[objectStack.length - 1]);\n  const version = context['version'];\n  const featurePrefix = context['featurePrefix'];\n  const featureNS = context['featureNS'];\n  const propertyNames = context['propertyNames'];\n  const srsName = context['srsName'];\n  let typeName;\n  // If feature prefix is not defined, we must not use the default prefix.\n  if (featurePrefix) {\n    typeName = getTypeName(featurePrefix, featureType);\n  } else {\n    typeName = featureType;\n  }\n  let typeNameAttr;\n  if (version === '2.0.0') {\n    typeNameAttr = 'typeNames';\n  } else {\n    typeNameAttr = 'typeName';\n  }\n  node.setAttribute(typeNameAttr, typeName);\n  if (srsName) {\n    node.setAttribute('srsName', srsName);\n  }\n  if (featureNS) {\n    node.setAttributeNS(XMLNS, 'xmlns:' + featurePrefix, featureNS);\n  }\n  const item = /** @type {import(\"../xml.js\").NodeStackItem} */ (\n    Object.assign({}, context)\n  );\n  item.node = node;\n  pushSerializeAndPop(\n    item,\n    QUERY_SERIALIZERS,\n    makeSimpleNodeFactory('PropertyName'),\n    propertyNames,\n    objectStack\n  );\n  const filter = context['filter'];\n  if (filter) {\n    const child = createElementNS(getFilterNS(version), 'Filter');\n    node.appendChild(child);\n    writeFilterCondition(child, filter, objectStack);\n  }\n}\n\n/**\n * @param {Element} node Node.\n * @param {import(\"./filter/Filter.js\").default} filter Filter.\n * @param {Array<*>} objectStack Node stack.\n */\nfunction writeFilterCondition(node, filter, objectStack) {\n  const context = /** @type {Object} */ (objectStack[objectStack.length - 1]);\n  /** @type {import(\"../xml.js\").NodeStackItem} */\n  const item = {node};\n  Object.assign(item, {context});\n  pushSerializeAndPop(\n    item,\n    GETFEATURE_SERIALIZERS,\n    makeSimpleNodeFactory(filter.getTagName()),\n    [filter],\n    objectStack\n  );\n}\n\n/**\n * @param {Node} node Node.\n * @param {import(\"./filter/Bbox.js\").default} filter Filter.\n * @param {Array<*>} objectStack Node stack.\n */\nfunction writeBboxFilter(node, filter, objectStack) {\n  const parent = /** @type {Object} */ (objectStack[objectStack.length - 1]);\n  const context = parent['context'];\n  const version = context['version'];\n  parent['srsName'] = filter.srsName;\n  const format = GML_FORMATS[version];\n\n  writePropertyName(version, node, filter.geometryName);\n  format.prototype.writeGeometryElement(node, filter.extent, objectStack);\n}\n\n/**\n * @param {Element} node Element.\n * @param {import(\"./filter/ResourceId.js\").default} filter Filter.\n * @param {Array<*>} objectStack Node stack.\n */\nfunction writeResourceIdFilter(node, filter, objectStack) {\n  node.setAttribute('rid', /** @type {string} */ (filter.rid));\n}\n\n/**\n * @param {Node} node Node.\n * @param {import(\"./filter/Spatial.js\").default} filter Filter.\n * @param {Array<*>} objectStack Node stack.\n */\nfunction writeSpatialFilter(node, filter, objectStack) {\n  const parent = /** @type {Object} */ (objectStack[objectStack.length - 1]);\n  const context = parent['context'];\n  const version = context['version'];\n  parent['srsName'] = filter.srsName;\n  const format = GML_FORMATS[version];\n\n  writePropertyName(version, node, filter.geometryName);\n  format.prototype.writeGeometryElement(node, filter.geometry, objectStack);\n}\n\n/**\n * @param {Node} node Node.\n * @param {import(\"./filter/DWithin.js\").default} filter Filter.\n * @param {Array<*>} objectStack Node stack.\n */\nfunction writeDWithinFilter(node, filter, objectStack) {\n  const parent = /** @type {Object} */ (objectStack[objectStack.length - 1]);\n  const context = parent['context'];\n  const version = context['version'];\n  writeSpatialFilter(node, filter, objectStack);\n  const distance = createElementNS(getFilterNS(version), 'Distance');\n  writeStringTextNode(distance, filter.distance.toString());\n  if (version === '2.0.0') {\n    distance.setAttribute('uom', filter.unit);\n  } else {\n    distance.setAttribute('units', filter.unit);\n  }\n  node.appendChild(distance);\n}\n\n/**\n * @param {Node} node Node.\n * @param {import(\"./filter/During.js\").default} filter Filter.\n * @param {Array<*>} objectStack Node stack.\n */\nfunction writeDuringFilter(node, filter, objectStack) {\n  const parent = /** @type {Object} */ (objectStack[objectStack.length - 1]);\n  const context = parent['context'];\n  const version = context['version'];\n\n  writeExpression(FESNS[version], 'ValueReference', node, filter.propertyName);\n  const timePeriod = createElementNS(GMLNS, 'TimePeriod');\n\n  node.appendChild(timePeriod);\n\n  const begin = createElementNS(GMLNS, 'begin');\n  timePeriod.appendChild(begin);\n  writeTimeInstant(begin, filter.begin);\n\n  const end = createElementNS(GMLNS, 'end');\n  timePeriod.appendChild(end);\n  writeTimeInstant(end, filter.end);\n}\n\n/**\n * @param {Element} node Node.\n * @param {import(\"./filter/LogicalNary.js\").default} filter Filter.\n * @param {Array<*>} objectStack Node stack.\n */\nfunction writeLogicalFilter(node, filter, objectStack) {\n  const parent = /** @type {Object} */ (objectStack[objectStack.length - 1]);\n  const context = parent['context'];\n  /** @type {import(\"../xml.js\").NodeStackItem} */\n  const item = {node};\n  Object.assign(item, {context});\n  const conditions = filter.conditions;\n  for (let i = 0, ii = conditions.length; i < ii; ++i) {\n    const condition = conditions[i];\n    pushSerializeAndPop(\n      item,\n      GETFEATURE_SERIALIZERS,\n      makeSimpleNodeFactory(condition.getTagName()),\n      [condition],\n      objectStack\n    );\n  }\n}\n\n/**\n * @param {Element} node Node.\n * @param {import(\"./filter/Not.js\").default} filter Filter.\n * @param {Array<*>} objectStack Node stack.\n */\nfunction writeNotFilter(node, filter, objectStack) {\n  const parent = /** @type {Object} */ (objectStack[objectStack.length - 1]);\n  const context = parent['context'];\n  /** @type {import(\"../xml.js\").NodeStackItem} */\n  const item = {node};\n  Object.assign(item, {context});\n  const condition = filter.condition;\n  pushSerializeAndPop(\n    item,\n    GETFEATURE_SERIALIZERS,\n    makeSimpleNodeFactory(condition.getTagName()),\n    [condition],\n    objectStack\n  );\n}\n\n/**\n * @param {Element} node Node.\n * @param {import(\"./filter/ComparisonBinary.js\").default} filter Filter.\n * @param {Array<*>} objectStack Node stack.\n */\nfunction writeComparisonFilter(node, filter, objectStack) {\n  const parent = /** @type {Object} */ (objectStack[objectStack.length - 1]);\n  const context = parent['context'];\n  const version = context['version'];\n  if (filter.matchCase !== undefined) {\n    node.setAttribute('matchCase', filter.matchCase.toString());\n  }\n  writePropertyName(version, node, filter.propertyName);\n  writeLiteral(version, node, '' + filter.expression);\n}\n\n/**\n * @param {Node} node Node.\n * @param {import(\"./filter/IsNull.js\").default} filter Filter.\n * @param {Array<*>} objectStack Node stack.\n */\nfunction writeIsNullFilter(node, filter, objectStack) {\n  const parent = /** @type {Object} */ (objectStack[objectStack.length - 1]);\n  const context = parent['context'];\n  const version = context['version'];\n  writePropertyName(version, node, filter.propertyName);\n}\n\n/**\n * @param {Node} node Node.\n * @param {import(\"./filter/IsBetween.js\").default} filter Filter.\n * @param {Array<*>} objectStack Node stack.\n */\nfunction writeIsBetweenFilter(node, filter, objectStack) {\n  const parent = /** @type {Object} */ (objectStack[objectStack.length - 1]);\n  const context = parent['context'];\n  const version = context['version'];\n  const ns = getFilterNS(version);\n\n  writePropertyName(version, node, filter.propertyName);\n\n  const lowerBoundary = createElementNS(ns, 'LowerBoundary');\n  node.appendChild(lowerBoundary);\n  writeLiteral(version, lowerBoundary, '' + filter.lowerBoundary);\n\n  const upperBoundary = createElementNS(ns, 'UpperBoundary');\n  node.appendChild(upperBoundary);\n  writeLiteral(version, upperBoundary, '' + filter.upperBoundary);\n}\n\n/**\n * @param {Element} node Node.\n * @param {import(\"./filter/IsLike.js\").default} filter Filter.\n * @param {Array<*>} objectStack Node stack.\n */\nfunction writeIsLikeFilter(node, filter, objectStack) {\n  const parent = /** @type {Object} */ (objectStack[objectStack.length - 1]);\n  const context = parent['context'];\n  const version = context['version'];\n  node.setAttribute('wildCard', filter.wildCard);\n  node.setAttribute('singleChar', filter.singleChar);\n  node.setAttribute('escapeChar', filter.escapeChar);\n  if (filter.matchCase !== undefined) {\n    node.setAttribute('matchCase', filter.matchCase.toString());\n  }\n  writePropertyName(version, node, filter.propertyName);\n  writeLiteral(version, node, '' + filter.pattern);\n}\n\n/**\n * @param {string} ns Namespace.\n * @param {string} tagName Tag name.\n * @param {Node} node Node.\n * @param {string} value Value.\n */\nfunction writeExpression(ns, tagName, node, value) {\n  const property = createElementNS(ns, tagName);\n  writeStringTextNode(property, value);\n  node.appendChild(property);\n}\n\n/**\n * @param {string} version Version.\n * @param {Node} node Node.\n * @param {string} value PropertyName value.\n */\nfunction writeLiteral(version, node, value) {\n  writeExpression(getFilterNS(version), 'Literal', node, value);\n}\n\n/**\n * @param {string} version Version.\n * @param {Node} node Node.\n * @param {string} value PropertyName value.\n */\nfunction writePropertyName(version, node, value) {\n  if (version === '2.0.0') {\n    writeExpression(FESNS[version], 'ValueReference', node, value);\n  } else {\n    writeExpression(OGCNS[version], 'PropertyName', node, value);\n  }\n}\n\n/**\n * @param {Node} node Node.\n * @param {string} time PropertyName value.\n */\nfunction writeTimeInstant(node, time) {\n  const timeInstant = createElementNS(GMLNS, 'TimeInstant');\n  node.appendChild(timeInstant);\n\n  const timePosition = createElementNS(GMLNS, 'timePosition');\n  timeInstant.appendChild(timePosition);\n  writeStringTextNode(timePosition, time);\n}\n\n/**\n * Encode filter as WFS `Filter` and return the Node.\n *\n * @param {import(\"./filter/Filter.js\").default} filter Filter.\n * @param {string} version WFS version. If not provided defaults to '1.1.0'\n * @return {Node} Result.\n * @api\n */\nexport function writeFilter(filter, version) {\n  version = version || '1.1.0';\n  const child = createElementNS(getFilterNS(version), 'Filter');\n  const context = {\n    node: child,\n  };\n  Object.assign(context, {\n    'version': version,\n    'filter': filter,\n  });\n  writeFilterCondition(child, filter, [context]);\n  return child;\n}\n\n/**\n * @param {Element} node Node.\n * @param {Array<string>} featureTypes Feature types.\n * @param {Array<*>} objectStack Node stack.\n */\nfunction writeGetFeature(node, featureTypes, objectStack) {\n  const context = /** @type {Object} */ (objectStack[objectStack.length - 1]);\n  const item = /** @type {import(\"../xml.js\").NodeStackItem} */ (\n    Object.assign({}, context)\n  );\n  item.node = node;\n  pushSerializeAndPop(\n    item,\n    GETFEATURE_SERIALIZERS,\n    makeSimpleNodeFactory('Query'),\n    featureTypes,\n    objectStack\n  );\n}\n\nfunction getFilterNS(version) {\n  let ns;\n  if (version === '2.0.0') {\n    ns = FESNS[version];\n  } else {\n    ns = OGCNS[version];\n  }\n  return ns;\n}\n\nexport default WFS;\n","/**\n * @module ol/format/WKB\n */\nimport Feature from '../Feature.js';\nimport FeatureFormat, {transformGeometryWithOptions} from './Feature.js';\nimport GeometryCollection from '../geom/GeometryCollection.js';\nimport LineString from '../geom/LineString.js';\nimport MultiLineString from '../geom/MultiLineString.js';\nimport MultiPoint from '../geom/MultiPoint.js';\nimport MultiPolygon from '../geom/MultiPolygon.js';\nimport Point from '../geom/Point.js';\nimport Polygon from '../geom/Polygon.js';\nimport {get as getProjection} from '../proj.js';\n\nimport SimpleGeometry from '../geom/SimpleGeometry.js';\n\n// WKB spec: https://www.ogc.org/standards/sfa\n// EWKB spec: https://raw.githubusercontent.com/postgis/postgis/2.1.0/doc/ZMSgeoms.txt\n\n/**\n * @const\n * @enum {number}\n */\nconst WKBGeometryType = {\n  POINT: 1,\n  LINE_STRING: 2,\n  POLYGON: 3,\n  MULTI_POINT: 4,\n  MULTI_LINE_STRING: 5,\n  MULTI_POLYGON: 6,\n  GEOMETRY_COLLECTION: 7,\n\n  /*\n  CIRCULAR_STRING: 8,\n  COMPOUND_CURVE: 9,\n  CURVE_POLYGON: 10,\n\n  MULTI_CURVE: 11,\n  MULTI_SURFACE: 12,\n  CURVE: 13,\n  SURFACE: 14,\n  */\n\n  POLYHEDRAL_SURFACE: 15,\n  TIN: 16,\n  TRIANGLE: 17,\n};\n\nclass WkbReader {\n  /**\n   * @param {DataView} view source to read\n   */\n  constructor(view) {\n    /** @private */\n    this.view_ = view;\n\n    /**\n     * @type {number}\n     * @private\n     */\n    this.pos_ = 0;\n\n    /**\n     * @type {boolean}\n     * @private\n     */\n    this.initialized_ = false;\n\n    /**\n     * @type {boolean}\n     * @private\n     */\n    this.isLittleEndian_ = false;\n\n    /**\n     * @type {boolean}\n     * @private\n     */\n    this.hasZ_ = false;\n\n    /**\n     * @type {boolean}\n     * @private\n     */\n    this.hasM_ = false;\n\n    /**\n     * @type {number|null}\n     * @private\n     */\n    this.srid_ = null;\n\n    /**\n     * @type {import(\"../geom/Geometry.js\").GeometryLayout}\n     * @private\n     */\n    this.layout_ = 'XY';\n  }\n\n  /**\n   * @return {number} value\n   */\n  readUint8() {\n    return this.view_.getUint8(this.pos_++);\n  }\n\n  /**\n   * @param {boolean} [isLittleEndian] Whether read value as little endian\n   * @return {number} value\n   */\n  readUint32(isLittleEndian) {\n    return this.view_.getUint32(\n      (this.pos_ += 4) - 4,\n      isLittleEndian !== undefined ? isLittleEndian : this.isLittleEndian_\n    );\n  }\n\n  /**\n   * @param {boolean} [isLittleEndian] Whether read value as little endian\n   * @return {number} value\n   */\n  readDouble(isLittleEndian) {\n    return this.view_.getFloat64(\n      (this.pos_ += 8) - 8,\n      isLittleEndian !== undefined ? isLittleEndian : this.isLittleEndian_\n    );\n  }\n\n  /**\n   * @return {import('../coordinate.js').Coordinate} coords for Point\n   */\n  readPoint() {\n    /** @type import('../coordinate.js').Coordinate */\n    const coords = [];\n\n    coords.push(this.readDouble());\n    coords.push(this.readDouble());\n    if (this.hasZ_) {\n      coords.push(this.readDouble());\n    }\n    if (this.hasM_) {\n      coords.push(this.readDouble());\n    }\n\n    return coords;\n  }\n\n  /**\n   * @return {Array<import('../coordinate.js').Coordinate>} coords for LineString / LinearRing\n   */\n  readLineString() {\n    const numPoints = this.readUint32();\n\n    /** @type Array<import('../coordinate.js').Coordinate> */\n    const coords = [];\n    for (let i = 0; i < numPoints; i++) {\n      coords.push(this.readPoint());\n    }\n\n    return coords;\n  }\n\n  /**\n   * @return {Array<Array<import('../coordinate.js').Coordinate>>} coords for Polygon like\n   */\n  readPolygon() {\n    const numRings = this.readUint32();\n\n    /** @type Array<Array<import('../coordinate.js').Coordinate>> */\n    const rings = [];\n    for (let i = 0; i < numRings; i++) {\n      rings.push(this.readLineString()); // as a LinearRing\n    }\n\n    return rings;\n  }\n\n  /**\n   * @param {number} [expectedTypeId] Expected WKB Type ID\n   * @return {number} WKB Type ID\n   */\n  readWkbHeader(expectedTypeId) {\n    const byteOrder = this.readUint8();\n    const isLittleEndian = byteOrder > 0;\n\n    const wkbType = this.readUint32(isLittleEndian);\n    const wkbTypeThousandth = Math.floor((wkbType & 0x0fffffff) / 1000);\n    const hasZ =\n      Boolean(wkbType & 0x80000000) ||\n      wkbTypeThousandth === 1 ||\n      wkbTypeThousandth === 3;\n    const hasM =\n      Boolean(wkbType & 0x40000000) ||\n      wkbTypeThousandth === 2 ||\n      wkbTypeThousandth === 3;\n    const hasSRID = Boolean(wkbType & 0x20000000);\n    const typeId = (wkbType & 0x0fffffff) % 1000; // Assume 1000 is an upper limit for type ID\n    const layout = /** @type {import(\"../geom/Geometry.js\").GeometryLayout} */ (\n      ['XY', hasZ ? 'Z' : '', hasM ? 'M' : ''].join('')\n    );\n\n    const srid = hasSRID ? this.readUint32(isLittleEndian) : null;\n\n    if (expectedTypeId !== undefined && expectedTypeId !== typeId) {\n      throw new Error('Unexpected WKB geometry type ' + typeId);\n    }\n\n    if (this.initialized_) {\n      // sanity checks\n      if (this.isLittleEndian_ !== isLittleEndian) {\n        throw new Error('Inconsistent endian');\n      }\n      if (this.layout_ !== layout) {\n        throw new Error('Inconsistent geometry layout');\n      }\n      if (srid && this.srid_ !== srid) {\n        throw new Error('Inconsistent coordinate system (SRID)');\n      }\n    } else {\n      this.isLittleEndian_ = isLittleEndian;\n      this.hasZ_ = hasZ;\n      this.hasM_ = hasM;\n      this.layout_ = layout;\n      this.srid_ = srid;\n      this.initialized_ = true;\n    }\n\n    return typeId;\n  }\n\n  /**\n   * @param {number} typeId WKB Type ID\n   * @return {any} values read\n   */\n  readWkbPayload(typeId) {\n    switch (typeId) {\n      case WKBGeometryType.POINT:\n        return this.readPoint();\n\n      case WKBGeometryType.LINE_STRING:\n        return this.readLineString();\n\n      case WKBGeometryType.POLYGON:\n      case WKBGeometryType.TRIANGLE:\n        return this.readPolygon();\n\n      case WKBGeometryType.MULTI_POINT:\n        return this.readMultiPoint();\n\n      case WKBGeometryType.MULTI_LINE_STRING:\n        return this.readMultiLineString();\n\n      case WKBGeometryType.MULTI_POLYGON:\n      case WKBGeometryType.POLYHEDRAL_SURFACE:\n      case WKBGeometryType.TIN:\n        return this.readMultiPolygon();\n\n      case WKBGeometryType.GEOMETRY_COLLECTION:\n        return this.readGeometryCollection();\n\n      default:\n        throw new Error(\n          'Unsupported WKB geometry type ' + typeId + ' is found'\n        );\n    }\n  }\n\n  /**\n   * @param {number} expectedTypeId Expected WKB Type ID\n   * @return {any} values read\n   */\n  readWkbBlock(expectedTypeId) {\n    return this.readWkbPayload(this.readWkbHeader(expectedTypeId));\n  }\n\n  /**\n   * @param {Function} reader reader function for each item\n   * @param {number} [expectedTypeId] Expected WKB Type ID\n   * @return {any} values read\n   */\n  readWkbCollection(reader, expectedTypeId) {\n    const num = this.readUint32();\n\n    const items = [];\n    for (let i = 0; i < num; i++) {\n      const result = reader.call(this, expectedTypeId);\n      if (result) {\n        items.push(result);\n      }\n    }\n\n    return items;\n  }\n\n  /**\n   * @return {Array<import('../coordinate.js').Coordinate>} coords for MultiPoint\n   */\n  readMultiPoint() {\n    return this.readWkbCollection(this.readWkbBlock, WKBGeometryType.POINT);\n  }\n\n  /**\n   * @return {Array<Array<import('../coordinate.js').Coordinate>>} coords for MultiLineString like\n   */\n  readMultiLineString() {\n    return this.readWkbCollection(\n      this.readWkbBlock,\n      WKBGeometryType.LINE_STRING\n    );\n  }\n\n  /**\n   * @return {Array<Array<Array<import('../coordinate.js').Coordinate>>>} coords for MultiPolygon like\n   */\n  readMultiPolygon() {\n    return this.readWkbCollection(this.readWkbBlock, WKBGeometryType.POLYGON);\n  }\n\n  /**\n   * @return {Array<import('../geom/Geometry.js').default>} array of geometries\n   */\n  readGeometryCollection() {\n    return this.readWkbCollection(this.readGeometry);\n  }\n\n  /**\n   * @return {import('../geom/Geometry.js').default} geometry\n   */\n  readGeometry() {\n    const typeId = this.readWkbHeader();\n    const result = this.readWkbPayload(typeId);\n\n    switch (typeId) {\n      case WKBGeometryType.POINT:\n        return new Point(\n          /** @type {import('../coordinate.js').Coordinate} */ (result),\n          this.layout_\n        );\n\n      case WKBGeometryType.LINE_STRING:\n        return new LineString(\n          /** @type {Array<import('../coordinate.js').Coordinate>} */ (result),\n          this.layout_\n        );\n\n      case WKBGeometryType.POLYGON:\n      case WKBGeometryType.TRIANGLE:\n        return new Polygon(\n          /** @type {Array<Array<import('../coordinate.js').Coordinate>>} */ (\n            result\n          ),\n          this.layout_\n        );\n\n      case WKBGeometryType.MULTI_POINT:\n        return new MultiPoint(\n          /** @type {Array<import('../coordinate.js').Coordinate>} */ (result),\n          this.layout_\n        );\n\n      case WKBGeometryType.MULTI_LINE_STRING:\n        return new MultiLineString(\n          /** @type {Array<Array<import('../coordinate.js').Coordinate>>} */ (\n            result\n          ),\n          this.layout_\n        );\n\n      case WKBGeometryType.MULTI_POLYGON:\n      case WKBGeometryType.POLYHEDRAL_SURFACE:\n      case WKBGeometryType.TIN:\n        return new MultiPolygon(\n          /** @type {Array<Array<Array<import('../coordinate.js').Coordinate>>>} */ (\n            result\n          ),\n          this.layout_\n        );\n\n      case WKBGeometryType.GEOMETRY_COLLECTION:\n        return new GeometryCollection(\n          /** @type {Array<import('../geom/Geometry.js').default>} */ (result)\n        );\n\n      default:\n        return null;\n    }\n  }\n\n  /**\n   * @return {number|null} SRID in the EWKB. `null` if not defined.\n   */\n  getSrid() {\n    return this.srid_;\n  }\n}\n\nclass WkbWriter {\n  /**\n   * @type {Object}\n   * @property {string} [layout] geometryLayout\n   * @property {boolean} [littleEndian=true] littleEndian\n   * @property {boolean} [ewkb=true] Whether writes in EWKB format\n   * @property {Object} [nodata] NoData value for each axes\n   * @param {Object} opts options\n   */\n  constructor(opts) {\n    opts = opts || {};\n\n    /** @type {string} */\n    this.layout_ = opts.layout;\n    this.isLittleEndian_ = opts.littleEndian !== false;\n\n    this.isEWKB_ = opts.ewkb !== false;\n\n    /** @type {Array<Array<number>>} */\n    this.writeQueue_ = [];\n\n    /**\n     * @type {Object}\n     * @property {number} X NoData value for X\n     * @property {number} Y NoData value for Y\n     * @property {number} Z NoData value for Z\n     * @property {number} M NoData value for M\n     */\n    this.nodata_ = Object.assign({X: 0, Y: 0, Z: 0, M: 0}, opts.nodata);\n  }\n\n  /**\n   * @param {number} value value\n   */\n  writeUint8(value) {\n    this.writeQueue_.push([1, value]);\n  }\n\n  /**\n   * @param {number} value value\n   */\n  writeUint32(value) {\n    this.writeQueue_.push([4, value]);\n  }\n\n  /**\n   * @param {number} value value\n   */\n  writeDouble(value) {\n    this.writeQueue_.push([8, value]);\n  }\n\n  /**\n   * @param {import('../coordinate.js').Coordinate} coords coords\n   * @param {import(\"../geom/Geometry.js\").GeometryLayout} layout layout\n   */\n  writePoint(coords, layout) {\n    /**\n     * @type {Object}\n     * @property {number} X NoData value for X\n     * @property {number} Y NoData value for Y\n     * @property {number} [Z] NoData value for Z\n     * @property {number} [M] NoData value for M\n     */\n    const coordsObj = Object.assign.apply(\n      null,\n      layout.split('').map((axis, idx) => ({[axis]: coords[idx]}))\n    );\n\n    for (const axis of this.layout_) {\n      this.writeDouble(\n        axis in coordsObj ? coordsObj[axis] : this.nodata_[axis]\n      );\n    }\n  }\n\n  /**\n   * @param {Array<import('../coordinate.js').Coordinate>} coords coords\n   * @param {import(\"../geom/Geometry.js\").GeometryLayout} layout layout\n   */\n  writeLineString(coords, layout) {\n    this.writeUint32(coords.length); // numPoints\n    for (let i = 0; i < coords.length; i++) {\n      this.writePoint(coords[i], layout);\n    }\n  }\n\n  /**\n   * @param {Array<Array<import('../coordinate.js').Coordinate>>} rings rings\n   * @param {import(\"../geom/Geometry.js\").GeometryLayout} layout layout\n   */\n  writePolygon(rings, layout) {\n    this.writeUint32(rings.length); // numRings\n    for (let i = 0; i < rings.length; i++) {\n      this.writeLineString(rings[i], layout); // as a LinearRing\n    }\n  }\n\n  /**\n   * @param {number} wkbType WKB Type ID\n   * @param {number} [srid] SRID\n   */\n  writeWkbHeader(wkbType, srid) {\n    wkbType %= 1000; // Assume 1000 is an upper limit for type ID\n    if (this.layout_.includes('Z')) {\n      wkbType += this.isEWKB_ ? 0x80000000 : 1000;\n    }\n    if (this.layout_.includes('M')) {\n      wkbType += this.isEWKB_ ? 0x40000000 : 2000;\n    }\n    if (this.isEWKB_ && Number.isInteger(srid)) {\n      wkbType |= 0x20000000;\n    }\n\n    this.writeUint8(this.isLittleEndian_ ? 1 : 0);\n    this.writeUint32(wkbType);\n    if (this.isEWKB_ && Number.isInteger(srid)) {\n      this.writeUint32(srid);\n    }\n  }\n\n  /**\n   * @param {Array<import('../coordinate.js').Coordinate>} coords coords\n   * @param {import(\"../geom/Geometry.js\").GeometryLayout} layout layout\n   */\n  writeMultiPoint(coords, layout) {\n    this.writeUint32(coords.length); // numItems\n    for (let i = 0; i < coords.length; i++) {\n      this.writeWkbHeader(1);\n      this.writePoint(coords[i], layout);\n    }\n  }\n\n  /**\n   * @param {Array<Array<import('../coordinate.js').Coordinate>>} coords coords\n   * @param {import(\"../geom/Geometry.js\").GeometryLayout} layout layout\n   */\n  writeMultiLineString(coords, layout) {\n    this.writeUint32(coords.length); // numItems\n    for (let i = 0; i < coords.length; i++) {\n      this.writeWkbHeader(2);\n      this.writeLineString(coords[i], layout);\n    }\n  }\n\n  /**\n   * @param {Array<Array<Array<import('../coordinate.js').Coordinate>>>} coords coords\n   * @param {import(\"../geom/Geometry.js\").GeometryLayout} layout layout\n   */\n  writeMultiPolygon(coords, layout) {\n    this.writeUint32(coords.length); // numItems\n    for (let i = 0; i < coords.length; i++) {\n      this.writeWkbHeader(3);\n      this.writePolygon(coords[i], layout);\n    }\n  }\n\n  /**\n   * @param {Array<import('../geom/Geometry.js').default>} geometries geometries\n   */\n  writeGeometryCollection(geometries) {\n    this.writeUint32(geometries.length); // numItems\n\n    for (let i = 0; i < geometries.length; i++) {\n      this.writeGeometry(geometries[i]);\n    }\n  }\n\n  /**\n   * @param {import(\"../geom/Geometry.js\").default} geom geometry\n   * @param {import(\"../geom/Geometry.js\").GeometryLayout} [layout] layout\n   * @return {import(\"../geom/Geometry.js\").GeometryLayout} minimum layout made by common axes\n   */\n  findMinimumLayout(geom, layout = 'XYZM') {\n    /**\n     * @param {import(\"../geom/Geometry.js\").GeometryLayout} a A\n     * @param {import(\"../geom/Geometry.js\").GeometryLayout} b B\n     * @return {import(\"../geom/Geometry.js\").GeometryLayout} minimum layout made by common axes\n     */\n    const GeometryLayout_min = (a, b) => {\n      if (a === b) {\n        return a;\n      }\n\n      if (a === 'XYZM') {\n        // anything `b` is minimum\n        return b;\n      }\n      if (b === 'XYZM') {\n        // anything `a` is minimum\n        return a;\n      }\n\n      // otherwise, incompatible\n      return 'XY';\n    };\n\n    if (geom instanceof SimpleGeometry) {\n      return GeometryLayout_min(geom.getLayout(), layout);\n    }\n\n    if (geom instanceof GeometryCollection) {\n      const geoms = geom.getGeometriesArray();\n      for (let i = 0; i < geoms.length && layout !== 'XY'; i++) {\n        layout = this.findMinimumLayout(geoms[i], layout);\n      }\n    }\n\n    return layout;\n  }\n\n  /**\n   * @param {import(\"../geom/Geometry.js\").default} geom geometry\n   * @param {number} [srid] SRID\n   */\n  writeGeometry(geom, srid) {\n    /**\n     * @type {Object<import(\"../geom/Geometry.js\").Type, WKBGeometryType>}\n     */\n    const wkblut = {\n      Point: WKBGeometryType.POINT,\n      LineString: WKBGeometryType.LINE_STRING,\n      Polygon: WKBGeometryType.POLYGON,\n      MultiPoint: WKBGeometryType.MULTI_POINT,\n      MultiLineString: WKBGeometryType.MULTI_LINE_STRING,\n      MultiPolygon: WKBGeometryType.MULTI_POLYGON,\n      GeometryCollection: WKBGeometryType.GEOMETRY_COLLECTION,\n    };\n    const geomType = geom.getType();\n    const typeId = wkblut[geomType];\n\n    if (!typeId) {\n      throw new Error('GeometryType ' + geomType + ' is not supported');\n    }\n\n    // first call of writeGeometry() traverse whole geometries to determine its output layout if not specified on constructor.\n    if (!this.layout_) {\n      this.layout_ = this.findMinimumLayout(geom);\n    }\n\n    this.writeWkbHeader(typeId, srid);\n\n    if (geom instanceof SimpleGeometry) {\n      const writerLUT = {\n        Point: this.writePoint,\n        LineString: this.writeLineString,\n        Polygon: this.writePolygon,\n        MultiPoint: this.writeMultiPoint,\n        MultiLineString: this.writeMultiLineString,\n        MultiPolygon: this.writeMultiPolygon,\n      };\n      writerLUT[geomType].call(this, geom.getCoordinates(), geom.getLayout());\n    } else if (geom instanceof GeometryCollection) {\n      this.writeGeometryCollection(geom.getGeometriesArray());\n    }\n  }\n\n  getBuffer() {\n    const byteLength = this.writeQueue_.reduce((acc, item) => acc + item[0], 0);\n    const buffer = new ArrayBuffer(byteLength);\n    const view = new DataView(buffer);\n\n    let pos = 0;\n    this.writeQueue_.forEach((item) => {\n      switch (item[0]) {\n        case 1:\n          view.setUint8(pos, item[1]);\n          break;\n        case 4:\n          view.setUint32(pos, item[1], this.isLittleEndian_);\n          break;\n        case 8:\n          view.setFloat64(pos, item[1], this.isLittleEndian_);\n          break;\n        default:\n          break;\n      }\n\n      pos += item[0];\n    });\n\n    return buffer;\n  }\n}\n\n/**\n * @typedef {Object} Options\n * @property {boolean} [splitCollection=false] Whether to split GeometryCollections into multiple features on reading.\n * @property {boolean} [hex=true] Returns hex string instead of ArrayBuffer for output. This also is used as a hint internally whether it should load contents as text or ArrayBuffer on reading.\n * @property {boolean} [littleEndian=true] Use littleEndian for output.\n * @property {boolean} [ewkb=true] Use EWKB format for output.\n * @property {import(\"../geom/Geometry.js\").GeometryLayout} [geometryLayout=null] Use specific coordinate layout for output features (null: auto detect)\n * @property {number} [nodataZ=0] If the `geometryLayout` doesn't match with geometry to be output, this value is used to fill missing coordinate value of Z.\n * @property {number} [nodataM=0] If the `geometryLayout` doesn't match with geometry to be output, this value is used to fill missing coordinate value of M.\n * @property {number|boolean} [srid=true] SRID for output. Specify integer value to enforce the value as a SRID. Specify `true` to extract from `dataProjection`. `false` to suppress the output. This option only takes effect when `ewkb` is `true`.\n */\n\n/**\n * @classdesc\n * Geometry format for reading and writing data in the `Well-Known Binary` (WKB) format.\n * Also supports `Extended Well-Known Binary` (EWKB) format, used in PostGIS for example.\n *\n * @api\n */\nclass WKB extends FeatureFormat {\n  /**\n   * @param {Options} [options] Optional configuration object.\n   */\n  constructor(options) {\n    super();\n\n    options = options ? options : {};\n\n    this.splitCollection = Boolean(options.splitCollection);\n\n    this.viewCache_ = null;\n\n    this.hex_ = options.hex !== false;\n    this.littleEndian_ = options.littleEndian !== false;\n    this.ewkb_ = options.ewkb !== false;\n\n    this.layout_ = options.geometryLayout; // null for auto detect\n    this.nodataZ_ = options.nodataZ || 0;\n    this.nodataM_ = options.nodataM || 0;\n\n    this.srid_ = options.srid;\n  }\n\n  /**\n   * @return {import(\"./Feature.js\").Type} Format.\n   */\n  getType() {\n    return this.hex_ ? 'text' : 'arraybuffer';\n  }\n\n  /**\n   * Read a single feature from a source.\n   *\n   * @param {string|ArrayBuffer|ArrayBufferView} source Source.\n   * @param {import(\"./Feature.js\").ReadOptions} [options] Read options.\n   * @return {import(\"../Feature.js\").default} Feature.\n   * @api\n   */\n  readFeature(source, options) {\n    return new Feature({\n      geometry: this.readGeometry(source, options),\n    });\n  }\n\n  /**\n   * Read all features from a source.\n   *\n   * @param {string|ArrayBuffer|ArrayBufferView} source Source.\n   * @param {import(\"./Feature.js\").ReadOptions} [options] Read options.\n   * @return {Array<import(\"../Feature.js\").default>} Features.\n   * @api\n   */\n  readFeatures(source, options) {\n    let geometries = [];\n    const geometry = this.readGeometry(source, options);\n    if (this.splitCollection && geometry instanceof GeometryCollection) {\n      geometries = geometry.getGeometriesArray();\n    } else {\n      geometries = [geometry];\n    }\n    return geometries.map((geometry) => new Feature({geometry}));\n  }\n\n  /**\n   * Read a single geometry from a source.\n   *\n   * @param {string|ArrayBuffer|ArrayBufferView} source Source.\n   * @param {import(\"./Feature.js\").ReadOptions} [options] Read options.\n   * @return {import(\"../geom/Geometry.js\").default} Geometry.\n   * @api\n   */\n  readGeometry(source, options) {\n    const view = getDataView(source);\n    if (!view) {\n      return null;\n    }\n\n    const reader = new WkbReader(view);\n    const geometry = reader.readGeometry();\n\n    this.viewCache_ = view; // cache for internal subsequent call of readProjection()\n    options = this.getReadOptions(source, options);\n    this.viewCache_ = null; // release\n\n    return transformGeometryWithOptions(geometry, false, options);\n  }\n\n  /**\n   * Read the projection from a source.\n   *\n   * @param {string|ArrayBuffer|ArrayBufferView} source Source.\n   * @return {import(\"../proj/Projection.js\").default|undefined} Projection.\n   * @api\n   */\n  readProjection(source) {\n    const view = this.viewCache_ || getDataView(source);\n    if (!view) {\n      return undefined;\n    }\n\n    const reader = new WkbReader(view);\n    reader.readWkbHeader();\n\n    return (\n      (reader.getSrid() && getProjection('EPSG:' + reader.getSrid())) ||\n      undefined\n    );\n  }\n\n  /**\n   * Encode a feature in this format.\n   *\n   * @param {import(\"../Feature.js\").default} feature Feature.\n   * @param {import(\"./Feature.js\").WriteOptions} [options] Write options.\n   * @return {string|ArrayBuffer} Result.\n   * @api\n   */\n  writeFeature(feature, options) {\n    return this.writeGeometry(feature.getGeometry(), options);\n  }\n\n  /**\n   * Encode an array of features in this format.\n   *\n   * @param {Array<import(\"../Feature.js\").default>} features Features.\n   * @param {import(\"./Feature.js\").WriteOptions} [options] Write options.\n   * @return {string|ArrayBuffer} Result.\n   * @api\n   */\n  writeFeatures(features, options) {\n    return this.writeGeometry(\n      new GeometryCollection(features.map((f) => f.getGeometry())),\n      options\n    );\n  }\n\n  /**\n   * Write a single geometry in this format.\n   *\n   * @param {import(\"../geom/Geometry.js\").default} geometry Geometry.\n   * @param {import(\"./Feature.js\").WriteOptions} [options] Write options.\n   * @return {string|ArrayBuffer} Result.\n   * @api\n   */\n  writeGeometry(geometry, options) {\n    options = this.adaptOptions(options);\n\n    const writer = new WkbWriter({\n      layout: this.layout_,\n      littleEndian: this.littleEndian_,\n      ewkb: this.ewkb_,\n\n      nodata: {\n        Z: this.nodataZ_,\n        M: this.nodataM_,\n      },\n    });\n\n    // extract SRID from `dataProjection`\n    let srid = Number.isInteger(this.srid_) ? Number(this.srid_) : null;\n    if (this.srid_ !== false && !Number.isInteger(this.srid_)) {\n      const dataProjection =\n        options.dataProjection && getProjection(options.dataProjection);\n      if (dataProjection) {\n        const code = dataProjection.getCode();\n        if (code.startsWith('EPSG:')) {\n          srid = Number(code.substring(5));\n        }\n      }\n    }\n\n    writer.writeGeometry(\n      transformGeometryWithOptions(geometry, true, options),\n      srid\n    );\n    const buffer = writer.getBuffer();\n\n    return this.hex_ ? encodeHexString(buffer) : buffer;\n  }\n}\n\n/**\n * @param {ArrayBuffer} buffer source buffer\n * @return {string} encoded hex string\n */\nfunction encodeHexString(buffer) {\n  const view = new Uint8Array(buffer);\n  return Array.from(view.values())\n    .map((x) => (x < 16 ? '0' : '') + Number(x).toString(16).toUpperCase())\n    .join('');\n}\n\n/**\n * @param {string} text source text\n * @return {DataView} decoded binary buffer\n */\nfunction decodeHexString(text) {\n  const buffer = new Uint8Array(text.length / 2);\n  for (let i = 0; i < text.length / 2; i++) {\n    buffer[i] = parseInt(text.substr(i * 2, 2), 16);\n  }\n  return new DataView(buffer.buffer);\n}\n\n/**\n * @param {string | ArrayBuffer | ArrayBufferView} source source\n * @return {DataView} data view\n */\nfunction getDataView(source) {\n  if (typeof source === 'string') {\n    return decodeHexString(source);\n  }\n  if (ArrayBuffer.isView(source)) {\n    if (source instanceof DataView) {\n      return source;\n    }\n    return new DataView(source.buffer, source.byteOffset, source.byteLength);\n  }\n  if (source instanceof ArrayBuffer) {\n    return new DataView(source);\n  }\n  return null;\n}\n\nexport default WKB;\n","/**\n * @module ol/format/WKT\n */\nimport Feature from '../Feature.js';\nimport GeometryCollection from '../geom/GeometryCollection.js';\nimport LineString from '../geom/LineString.js';\nimport MultiLineString from '../geom/MultiLineString.js';\nimport MultiPoint from '../geom/MultiPoint.js';\nimport MultiPolygon from '../geom/MultiPolygon.js';\nimport Point from '../geom/Point.js';\nimport Polygon from '../geom/Polygon.js';\nimport TextFeature from './TextFeature.js';\nimport {transformGeometryWithOptions} from './Feature.js';\n\n/**\n * Geometry constructors\n * @enum {function (new:import(\"../geom/Geometry.js\").default, Array, import(\"../geom/Geometry.js\").GeometryLayout)}\n */\nconst GeometryConstructor = {\n  'POINT': Point,\n  'LINESTRING': LineString,\n  'POLYGON': Polygon,\n  'MULTIPOINT': MultiPoint,\n  'MULTILINESTRING': MultiLineString,\n  'MULTIPOLYGON': MultiPolygon,\n};\n\n/**\n * @typedef {Object} Options\n * @property {boolean} [splitCollection=false] Whether to split GeometryCollections into\n * multiple features on reading.\n */\n\n/**\n * @typedef {Object} Token\n * @property {number} type Type.\n * @property {number|string} [value] Value.\n * @property {number} position Position.\n */\n\n/**\n * @const\n * @type {string}\n */\nconst EMPTY = 'EMPTY';\n\n/**\n * @const\n * @type {string}\n */\nconst Z = 'Z';\n\n/**\n * @const\n * @type {string}\n */\nconst M = 'M';\n\n/**\n * @const\n * @type {string}\n */\nconst ZM = 'ZM';\n\n/**\n * @const\n * @enum {number}\n */\nconst TokenType = {\n  START: 0,\n  TEXT: 1,\n  LEFT_PAREN: 2,\n  RIGHT_PAREN: 3,\n  NUMBER: 4,\n  COMMA: 5,\n  EOF: 6,\n};\n\n/**\n * @type {Object<import(\"../geom/Geometry.js\").Type, string>}\n */\nconst wktTypeLookup = {\n  Point: 'POINT',\n  LineString: 'LINESTRING',\n  Polygon: 'POLYGON',\n  MultiPoint: 'MULTIPOINT',\n  MultiLineString: 'MULTILINESTRING',\n  MultiPolygon: 'MULTIPOLYGON',\n  GeometryCollection: 'GEOMETRYCOLLECTION',\n  Circle: 'CIRCLE',\n};\n\n/**\n * Class to tokenize a WKT string.\n */\nclass Lexer {\n  /**\n   * @param {string} wkt WKT string.\n   */\n  constructor(wkt) {\n    /**\n     * @type {string}\n     */\n    this.wkt = wkt;\n\n    /**\n     * @type {number}\n     * @private\n     */\n    this.index_ = -1;\n  }\n\n  /**\n   * @param {string} c Character.\n   * @return {boolean} Whether the character is alphabetic.\n   * @private\n   */\n  isAlpha_(c) {\n    return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z');\n  }\n\n  /**\n   * @param {string} c Character.\n   * @param {boolean} [decimal] Whether the string number\n   *     contains a dot, i.e. is a decimal number.\n   * @return {boolean} Whether the character is numeric.\n   * @private\n   */\n  isNumeric_(c, decimal) {\n    decimal = decimal !== undefined ? decimal : false;\n    return (c >= '0' && c <= '9') || (c == '.' && !decimal);\n  }\n\n  /**\n   * @param {string} c Character.\n   * @return {boolean} Whether the character is whitespace.\n   * @private\n   */\n  isWhiteSpace_(c) {\n    return c == ' ' || c == '\\t' || c == '\\r' || c == '\\n';\n  }\n\n  /**\n   * @return {string} Next string character.\n   * @private\n   */\n  nextChar_() {\n    return this.wkt.charAt(++this.index_);\n  }\n\n  /**\n   * Fetch and return the next token.\n   * @return {Token} Next string token.\n   */\n  nextToken() {\n    const c = this.nextChar_();\n    const position = this.index_;\n    /** @type {number|string} */\n    let value = c;\n    let type;\n\n    if (c == '(') {\n      type = TokenType.LEFT_PAREN;\n    } else if (c == ',') {\n      type = TokenType.COMMA;\n    } else if (c == ')') {\n      type = TokenType.RIGHT_PAREN;\n    } else if (this.isNumeric_(c) || c == '-') {\n      type = TokenType.NUMBER;\n      value = this.readNumber_();\n    } else if (this.isAlpha_(c)) {\n      type = TokenType.TEXT;\n      value = this.readText_();\n    } else if (this.isWhiteSpace_(c)) {\n      return this.nextToken();\n    } else if (c === '') {\n      type = TokenType.EOF;\n    } else {\n      throw new Error('Unexpected character: ' + c);\n    }\n\n    return {position: position, value: value, type: type};\n  }\n\n  /**\n   * @return {number} Numeric token value.\n   * @private\n   */\n  readNumber_() {\n    let c;\n    const index = this.index_;\n    let decimal = false;\n    let scientificNotation = false;\n    do {\n      if (c == '.') {\n        decimal = true;\n      } else if (c == 'e' || c == 'E') {\n        scientificNotation = true;\n      }\n      c = this.nextChar_();\n    } while (\n      this.isNumeric_(c, decimal) ||\n      // if we haven't detected a scientific number before, 'e' or 'E'\n      // hint that we should continue to read\n      (!scientificNotation && (c == 'e' || c == 'E')) ||\n      // once we know that we have a scientific number, both '-' and '+'\n      // are allowed\n      (scientificNotation && (c == '-' || c == '+'))\n    );\n    return parseFloat(this.wkt.substring(index, this.index_--));\n  }\n\n  /**\n   * @return {string} String token value.\n   * @private\n   */\n  readText_() {\n    let c;\n    const index = this.index_;\n    do {\n      c = this.nextChar_();\n    } while (this.isAlpha_(c));\n    return this.wkt.substring(index, this.index_--).toUpperCase();\n  }\n}\n\n/**\n * Class to parse the tokens from the WKT string.\n */\nclass Parser {\n  /**\n   * @param {Lexer} lexer The lexer.\n   */\n  constructor(lexer) {\n    /**\n     * @type {Lexer}\n     * @private\n     */\n    this.lexer_ = lexer;\n\n    /**\n     * @type {Token}\n     * @private\n     */\n    this.token_ = {\n      position: 0,\n      type: TokenType.START,\n    };\n\n    /**\n     * @type {import(\"../geom/Geometry.js\").GeometryLayout}\n     * @private\n     */\n    this.layout_ = 'XY';\n  }\n\n  /**\n   * Fetch the next token form the lexer and replace the active token.\n   * @private\n   */\n  consume_() {\n    this.token_ = this.lexer_.nextToken();\n  }\n\n  /**\n   * Tests if the given type matches the type of the current token.\n   * @param {TokenType} type Token type.\n   * @return {boolean} Whether the token matches the given type.\n   */\n  isTokenType(type) {\n    return this.token_.type == type;\n  }\n\n  /**\n   * If the given type matches the current token, consume it.\n   * @param {TokenType} type Token type.\n   * @return {boolean} Whether the token matches the given type.\n   */\n  match(type) {\n    const isMatch = this.isTokenType(type);\n    if (isMatch) {\n      this.consume_();\n    }\n    return isMatch;\n  }\n\n  /**\n   * Try to parse the tokens provided by the lexer.\n   * @return {import(\"../geom/Geometry.js\").default} The geometry.\n   */\n  parse() {\n    this.consume_();\n    return this.parseGeometry_();\n  }\n\n  /**\n   * Try to parse the dimensional info.\n   * @return {import(\"../geom/Geometry.js\").GeometryLayout} The layout.\n   * @private\n   */\n  parseGeometryLayout_() {\n    /** @type {import(\"../geom/Geometry.js\").GeometryLayout} */\n    let layout = 'XY';\n    const dimToken = this.token_;\n    if (this.isTokenType(TokenType.TEXT)) {\n      const dimInfo = dimToken.value;\n      if (dimInfo === Z) {\n        layout = 'XYZ';\n      } else if (dimInfo === M) {\n        layout = 'XYM';\n      } else if (dimInfo === ZM) {\n        layout = 'XYZM';\n      }\n      if (layout !== 'XY') {\n        this.consume_();\n      }\n    }\n    return layout;\n  }\n\n  /**\n   * @return {Array<import(\"../geom/Geometry.js\").default>} A collection of geometries.\n   * @private\n   */\n  parseGeometryCollectionText_() {\n    if (this.match(TokenType.LEFT_PAREN)) {\n      const geometries = [];\n      do {\n        geometries.push(this.parseGeometry_());\n      } while (this.match(TokenType.COMMA));\n      if (this.match(TokenType.RIGHT_PAREN)) {\n        return geometries;\n      }\n    }\n    throw new Error(this.formatErrorMessage_());\n  }\n\n  /**\n   * @return {Array<number>} All values in a point.\n   * @private\n   */\n  parsePointText_() {\n    if (this.match(TokenType.LEFT_PAREN)) {\n      const coordinates = this.parsePoint_();\n      if (this.match(TokenType.RIGHT_PAREN)) {\n        return coordinates;\n      }\n    }\n    throw new Error(this.formatErrorMessage_());\n  }\n\n  /**\n   * @return {Array<Array<number>>} All points in a linestring.\n   * @private\n   */\n  parseLineStringText_() {\n    if (this.match(TokenType.LEFT_PAREN)) {\n      const coordinates = this.parsePointList_();\n      if (this.match(TokenType.RIGHT_PAREN)) {\n        return coordinates;\n      }\n    }\n    throw new Error(this.formatErrorMessage_());\n  }\n\n  /**\n   * @return {Array<Array<Array<number>>>} All points in a polygon.\n   * @private\n   */\n  parsePolygonText_() {\n    if (this.match(TokenType.LEFT_PAREN)) {\n      const coordinates = this.parseLineStringTextList_();\n      if (this.match(TokenType.RIGHT_PAREN)) {\n        return coordinates;\n      }\n    }\n    throw new Error(this.formatErrorMessage_());\n  }\n\n  /**\n   * @return {Array<Array<number>>} All points in a multipoint.\n   * @private\n   */\n  parseMultiPointText_() {\n    if (this.match(TokenType.LEFT_PAREN)) {\n      let coordinates;\n      if (this.token_.type == TokenType.LEFT_PAREN) {\n        coordinates = this.parsePointTextList_();\n      } else {\n        coordinates = this.parsePointList_();\n      }\n      if (this.match(TokenType.RIGHT_PAREN)) {\n        return coordinates;\n      }\n    }\n    throw new Error(this.formatErrorMessage_());\n  }\n\n  /**\n   * @return {Array<Array<Array<number>>>} All linestring points\n   *                                          in a multilinestring.\n   * @private\n   */\n  parseMultiLineStringText_() {\n    if (this.match(TokenType.LEFT_PAREN)) {\n      const coordinates = this.parseLineStringTextList_();\n      if (this.match(TokenType.RIGHT_PAREN)) {\n        return coordinates;\n      }\n    }\n    throw new Error(this.formatErrorMessage_());\n  }\n\n  /**\n   * @return {Array<Array<Array<Array<number>>>>} All polygon points in a multipolygon.\n   * @private\n   */\n  parseMultiPolygonText_() {\n    if (this.match(TokenType.LEFT_PAREN)) {\n      const coordinates = this.parsePolygonTextList_();\n      if (this.match(TokenType.RIGHT_PAREN)) {\n        return coordinates;\n      }\n    }\n    throw new Error(this.formatErrorMessage_());\n  }\n\n  /**\n   * @return {Array<number>} A point.\n   * @private\n   */\n  parsePoint_() {\n    const coordinates = [];\n    const dimensions = this.layout_.length;\n    for (let i = 0; i < dimensions; ++i) {\n      const token = this.token_;\n      if (this.match(TokenType.NUMBER)) {\n        coordinates.push(/** @type {number} */ (token.value));\n      } else {\n        break;\n      }\n    }\n    if (coordinates.length == dimensions) {\n      return coordinates;\n    }\n    throw new Error(this.formatErrorMessage_());\n  }\n\n  /**\n   * @return {Array<Array<number>>} An array of points.\n   * @private\n   */\n  parsePointList_() {\n    const coordinates = [this.parsePoint_()];\n    while (this.match(TokenType.COMMA)) {\n      coordinates.push(this.parsePoint_());\n    }\n    return coordinates;\n  }\n\n  /**\n   * @return {Array<Array<number>>} An array of points.\n   * @private\n   */\n  parsePointTextList_() {\n    const coordinates = [this.parsePointText_()];\n    while (this.match(TokenType.COMMA)) {\n      coordinates.push(this.parsePointText_());\n    }\n    return coordinates;\n  }\n\n  /**\n   * @return {Array<Array<Array<number>>>} An array of points.\n   * @private\n   */\n  parseLineStringTextList_() {\n    const coordinates = [this.parseLineStringText_()];\n    while (this.match(TokenType.COMMA)) {\n      coordinates.push(this.parseLineStringText_());\n    }\n    return coordinates;\n  }\n\n  /**\n   * @return {Array<Array<Array<Array<number>>>>} An array of points.\n   * @private\n   */\n  parsePolygonTextList_() {\n    const coordinates = [this.parsePolygonText_()];\n    while (this.match(TokenType.COMMA)) {\n      coordinates.push(this.parsePolygonText_());\n    }\n    return coordinates;\n  }\n\n  /**\n   * @return {boolean} Whether the token implies an empty geometry.\n   * @private\n   */\n  isEmptyGeometry_() {\n    const isEmpty =\n      this.isTokenType(TokenType.TEXT) && this.token_.value == EMPTY;\n    if (isEmpty) {\n      this.consume_();\n    }\n    return isEmpty;\n  }\n\n  /**\n   * Create an error message for an unexpected token error.\n   * @return {string} Error message.\n   * @private\n   */\n  formatErrorMessage_() {\n    return (\n      'Unexpected `' +\n      this.token_.value +\n      '` at position ' +\n      this.token_.position +\n      ' in `' +\n      this.lexer_.wkt +\n      '`'\n    );\n  }\n\n  /**\n   * @return {import(\"../geom/Geometry.js\").default} The geometry.\n   * @private\n   */\n  parseGeometry_() {\n    const token = this.token_;\n    if (this.match(TokenType.TEXT)) {\n      const geomType = /** @type {string} */ (token.value);\n      this.layout_ = this.parseGeometryLayout_();\n      const isEmpty = this.isEmptyGeometry_();\n      if (geomType == 'GEOMETRYCOLLECTION') {\n        if (isEmpty) {\n          return new GeometryCollection([]);\n        }\n        const geometries = this.parseGeometryCollectionText_();\n        return new GeometryCollection(geometries);\n      }\n      const ctor = GeometryConstructor[geomType];\n      if (!ctor) {\n        throw new Error('Invalid geometry type: ' + geomType);\n      }\n\n      let coordinates;\n\n      if (isEmpty) {\n        if (geomType == 'POINT') {\n          coordinates = [NaN, NaN];\n        } else {\n          coordinates = [];\n        }\n      } else {\n        switch (geomType) {\n          case 'POINT': {\n            coordinates = this.parsePointText_();\n            break;\n          }\n          case 'LINESTRING': {\n            coordinates = this.parseLineStringText_();\n            break;\n          }\n          case 'POLYGON': {\n            coordinates = this.parsePolygonText_();\n            break;\n          }\n          case 'MULTIPOINT': {\n            coordinates = this.parseMultiPointText_();\n            break;\n          }\n          case 'MULTILINESTRING': {\n            coordinates = this.parseMultiLineStringText_();\n            break;\n          }\n          case 'MULTIPOLYGON': {\n            coordinates = this.parseMultiPolygonText_();\n            break;\n          }\n          default:\n            break;\n        }\n      }\n\n      return new ctor(coordinates, this.layout_);\n    }\n    throw new Error(this.formatErrorMessage_());\n  }\n}\n\n/**\n * @classdesc\n * Geometry format for reading and writing data in the `WellKnownText` (WKT)\n * format.\n *\n * @api\n */\nclass WKT extends TextFeature {\n  /**\n   * @param {Options} [options] Options.\n   */\n  constructor(options) {\n    super();\n\n    options = options ? options : {};\n\n    /**\n     * Split GeometryCollection into multiple features.\n     * @type {boolean}\n     * @private\n     */\n    this.splitCollection_ =\n      options.splitCollection !== undefined ? options.splitCollection : false;\n  }\n\n  /**\n   * Parse a WKT string.\n   * @param {string} wkt WKT string.\n   * @return {import(\"../geom/Geometry.js\").default}\n   *     The geometry created.\n   * @private\n   */\n  parse_(wkt) {\n    const lexer = new Lexer(wkt);\n    const parser = new Parser(lexer);\n    return parser.parse();\n  }\n\n  /**\n   * @protected\n   * @param {string} text Text.\n   * @param {import(\"./Feature.js\").ReadOptions} [options] Read options.\n   * @return {import(\"../Feature.js\").default} Feature.\n   */\n  readFeatureFromText(text, options) {\n    const geom = this.readGeometryFromText(text, options);\n    const feature = new Feature();\n    feature.setGeometry(geom);\n    return feature;\n  }\n\n  /**\n   * @param {string} text Text.\n   * @param {import(\"./Feature.js\").ReadOptions} [options] Read options.\n   * @protected\n   * @return {Array<Feature>} Features.\n   */\n  readFeaturesFromText(text, options) {\n    let geometries = [];\n    const geometry = this.readGeometryFromText(text, options);\n    if (this.splitCollection_ && geometry.getType() == 'GeometryCollection') {\n      geometries = /** @type {GeometryCollection} */ (\n        geometry\n      ).getGeometriesArray();\n    } else {\n      geometries = [geometry];\n    }\n    const features = [];\n    for (let i = 0, ii = geometries.length; i < ii; ++i) {\n      const feature = new Feature();\n      feature.setGeometry(geometries[i]);\n      features.push(feature);\n    }\n    return features;\n  }\n\n  /**\n   * @param {string} text Text.\n   * @param {import(\"./Feature.js\").ReadOptions} [options] Read options.\n   * @protected\n   * @return {import(\"../geom/Geometry.js\").default} Geometry.\n   */\n  readGeometryFromText(text, options) {\n    const geometry = this.parse_(text);\n    return transformGeometryWithOptions(geometry, false, options);\n  }\n\n  /**\n   * @param {import(\"../Feature.js\").default} feature Features.\n   * @param {import(\"./Feature.js\").WriteOptions} [options] Write options.\n   * @protected\n   * @return {string} Text.\n   */\n  writeFeatureText(feature, options) {\n    const geometry = feature.getGeometry();\n    if (geometry) {\n      return this.writeGeometryText(geometry, options);\n    }\n    return '';\n  }\n\n  /**\n   * @param {Array<import(\"../Feature.js\").default>} features Features.\n   * @param {import(\"./Feature.js\").WriteOptions} [options] Write options.\n   * @protected\n   * @return {string} Text.\n   */\n  writeFeaturesText(features, options) {\n    if (features.length == 1) {\n      return this.writeFeatureText(features[0], options);\n    }\n    const geometries = [];\n    for (let i = 0, ii = features.length; i < ii; ++i) {\n      geometries.push(features[i].getGeometry());\n    }\n    const collection = new GeometryCollection(geometries);\n    return this.writeGeometryText(collection, options);\n  }\n\n  /**\n   * @param {import(\"../geom/Geometry.js\").default} geometry Geometry.\n   * @param {import(\"./Feature.js\").WriteOptions} [options] Write options.\n   * @protected\n   * @return {string} Text.\n   */\n  writeGeometryText(geometry, options) {\n    return encode(transformGeometryWithOptions(geometry, true, options));\n  }\n}\n\n/**\n * @param {Point} geom Point geometry.\n * @return {string} Coordinates part of Point as WKT.\n */\nfunction encodePointGeometry(geom) {\n  const coordinates = geom.getCoordinates();\n  if (coordinates.length === 0) {\n    return '';\n  }\n  return coordinates.join(' ');\n}\n\n/**\n * @param {MultiPoint} geom MultiPoint geometry.\n * @return {string} Coordinates part of MultiPoint as WKT.\n */\nfunction encodeMultiPointGeometry(geom) {\n  const array = [];\n  const components = geom.getPoints();\n  for (let i = 0, ii = components.length; i < ii; ++i) {\n    array.push('(' + encodePointGeometry(components[i]) + ')');\n  }\n  return array.join(',');\n}\n\n/**\n * @param {GeometryCollection} geom GeometryCollection geometry.\n * @return {string} Coordinates part of GeometryCollection as WKT.\n */\nfunction encodeGeometryCollectionGeometry(geom) {\n  const array = [];\n  const geoms = geom.getGeometries();\n  for (let i = 0, ii = geoms.length; i < ii; ++i) {\n    array.push(encode(geoms[i]));\n  }\n  return array.join(',');\n}\n\n/**\n * @param {LineString|import(\"../geom/LinearRing.js\").default} geom LineString geometry.\n * @return {string} Coordinates part of LineString as WKT.\n */\nfunction encodeLineStringGeometry(geom) {\n  const coordinates = geom.getCoordinates();\n  const array = [];\n  for (let i = 0, ii = coordinates.length; i < ii; ++i) {\n    array.push(coordinates[i].join(' '));\n  }\n  return array.join(',');\n}\n\n/**\n * @param {MultiLineString} geom MultiLineString geometry.\n * @return {string} Coordinates part of MultiLineString as WKT.\n */\nfunction encodeMultiLineStringGeometry(geom) {\n  const array = [];\n  const components = geom.getLineStrings();\n  for (let i = 0, ii = components.length; i < ii; ++i) {\n    array.push('(' + encodeLineStringGeometry(components[i]) + ')');\n  }\n  return array.join(',');\n}\n\n/**\n * @param {Polygon} geom Polygon geometry.\n * @return {string} Coordinates part of Polygon as WKT.\n */\nfunction encodePolygonGeometry(geom) {\n  const array = [];\n  const rings = geom.getLinearRings();\n  for (let i = 0, ii = rings.length; i < ii; ++i) {\n    array.push('(' + encodeLineStringGeometry(rings[i]) + ')');\n  }\n  return array.join(',');\n}\n\n/**\n * @param {MultiPolygon} geom MultiPolygon geometry.\n * @return {string} Coordinates part of MultiPolygon as WKT.\n */\nfunction encodeMultiPolygonGeometry(geom) {\n  const array = [];\n  const components = geom.getPolygons();\n  for (let i = 0, ii = components.length; i < ii; ++i) {\n    array.push('(' + encodePolygonGeometry(components[i]) + ')');\n  }\n  return array.join(',');\n}\n\n/**\n * @param {import(\"../geom/SimpleGeometry.js\").default} geom SimpleGeometry geometry.\n * @return {string} Potential dimensional information for WKT type.\n */\nfunction encodeGeometryLayout(geom) {\n  const layout = geom.getLayout();\n  let dimInfo = '';\n  if (layout === 'XYZ' || layout === 'XYZM') {\n    dimInfo += Z;\n  }\n  if (layout === 'XYM' || layout === 'XYZM') {\n    dimInfo += M;\n  }\n  return dimInfo;\n}\n\n/**\n * @const\n * @type {Object<string, function(import(\"../geom/Geometry.js\").default): string>}\n */\nconst GeometryEncoder = {\n  'Point': encodePointGeometry,\n  'LineString': encodeLineStringGeometry,\n  'Polygon': encodePolygonGeometry,\n  'MultiPoint': encodeMultiPointGeometry,\n  'MultiLineString': encodeMultiLineStringGeometry,\n  'MultiPolygon': encodeMultiPolygonGeometry,\n  'GeometryCollection': encodeGeometryCollectionGeometry,\n};\n\n/**\n * Encode a geometry as WKT.\n * @param {import(\"../geom/Geometry.js\").default} geom The geometry to encode.\n * @return {string} WKT string for the geometry.\n */\nfunction encode(geom) {\n  const type = geom.getType();\n  const geometryEncoder = GeometryEncoder[type];\n  const enc = geometryEncoder(geom);\n  let wktType = wktTypeLookup[type];\n  if (typeof (/** @type {?} */ (geom).getFlatCoordinates) === 'function') {\n    const dimInfo = encodeGeometryLayout(\n      /** @type {import(\"../geom/SimpleGeometry.js\").default} */ (geom)\n    );\n    if (dimInfo.length > 0) {\n      wktType += ' ' + dimInfo;\n    }\n  }\n  if (enc.length === 0) {\n    return wktType + ' ' + EMPTY;\n  }\n  return wktType + '(' + enc + ')';\n}\n\nexport default WKT;\n","/**\n * @module ol/format/WMSCapabilities\n */\nimport XML from './XML.js';\nimport {\n  makeArrayPusher,\n  makeObjectPropertyPusher,\n  makeObjectPropertySetter,\n  makeStructureNS,\n  pushParseAndPop,\n} from '../xml.js';\nimport {\n  readBooleanString,\n  readDecimal,\n  readDecimalString,\n  readNonNegativeIntegerString,\n  readPositiveInteger,\n  readString,\n} from './xsd.js';\nimport {readHref} from './xlink.js';\n\n/**\n * @const\n * @type {Array<null|string>}\n */\nconst NAMESPACE_URIS = [null, 'http://www.opengis.net/wms'];\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'Service': makeObjectPropertySetter(readService),\n  'Capability': makeObjectPropertySetter(readCapability),\n});\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst CAPABILITY_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'Request': makeObjectPropertySetter(readRequest),\n  'Exception': makeObjectPropertySetter(readException),\n  'Layer': makeObjectPropertySetter(readCapabilityLayer),\n});\n\n/**\n * @classdesc\n * Format for reading WMS capabilities data\n *\n * @api\n */\nclass WMSCapabilities extends XML {\n  constructor() {\n    super();\n\n    /**\n     * @type {string|undefined}\n     */\n    this.version = undefined;\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @return {Object} Object\n   */\n  readFromNode(node) {\n    this.version = node.getAttribute('version').trim();\n    const wmsCapabilityObject = pushParseAndPop(\n      {\n        'version': this.version,\n      },\n      PARSERS,\n      node,\n      []\n    );\n    return wmsCapabilityObject ? wmsCapabilityObject : null;\n  }\n}\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst SERVICE_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'Name': makeObjectPropertySetter(readString),\n  'Title': makeObjectPropertySetter(readString),\n  'Abstract': makeObjectPropertySetter(readString),\n  'KeywordList': makeObjectPropertySetter(readKeywordList),\n  'OnlineResource': makeObjectPropertySetter(readHref),\n  'ContactInformation': makeObjectPropertySetter(readContactInformation),\n  'Fees': makeObjectPropertySetter(readString),\n  'AccessConstraints': makeObjectPropertySetter(readString),\n  'LayerLimit': makeObjectPropertySetter(readPositiveInteger),\n  'MaxWidth': makeObjectPropertySetter(readPositiveInteger),\n  'MaxHeight': makeObjectPropertySetter(readPositiveInteger),\n});\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst CONTACT_INFORMATION_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'ContactPersonPrimary': makeObjectPropertySetter(readContactPersonPrimary),\n  'ContactPosition': makeObjectPropertySetter(readString),\n  'ContactAddress': makeObjectPropertySetter(readContactAddress),\n  'ContactVoiceTelephone': makeObjectPropertySetter(readString),\n  'ContactFacsimileTelephone': makeObjectPropertySetter(readString),\n  'ContactElectronicMailAddress': makeObjectPropertySetter(readString),\n});\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst CONTACT_PERSON_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'ContactPerson': makeObjectPropertySetter(readString),\n  'ContactOrganization': makeObjectPropertySetter(readString),\n});\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst CONTACT_ADDRESS_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'AddressType': makeObjectPropertySetter(readString),\n  'Address': makeObjectPropertySetter(readString),\n  'City': makeObjectPropertySetter(readString),\n  'StateOrProvince': makeObjectPropertySetter(readString),\n  'PostCode': makeObjectPropertySetter(readString),\n  'Country': makeObjectPropertySetter(readString),\n});\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst EXCEPTION_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'Format': makeArrayPusher(readString),\n});\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst LAYER_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'Name': makeObjectPropertySetter(readString),\n  'Title': makeObjectPropertySetter(readString),\n  'Abstract': makeObjectPropertySetter(readString),\n  'KeywordList': makeObjectPropertySetter(readKeywordList),\n  'CRS': makeObjectPropertyPusher(readString),\n  'EX_GeographicBoundingBox': makeObjectPropertySetter(\n    readEXGeographicBoundingBox\n  ),\n  'BoundingBox': makeObjectPropertyPusher(readBoundingBox),\n  'Dimension': makeObjectPropertyPusher(readDimension),\n  'Attribution': makeObjectPropertySetter(readAttribution),\n  'AuthorityURL': makeObjectPropertyPusher(readAuthorityURL),\n  'Identifier': makeObjectPropertyPusher(readString),\n  'MetadataURL': makeObjectPropertyPusher(readMetadataURL),\n  'DataURL': makeObjectPropertyPusher(readFormatOnlineresource),\n  'FeatureListURL': makeObjectPropertyPusher(readFormatOnlineresource),\n  'Style': makeObjectPropertyPusher(readStyle),\n  'MinScaleDenominator': makeObjectPropertySetter(readDecimal),\n  'MaxScaleDenominator': makeObjectPropertySetter(readDecimal),\n  'Layer': makeObjectPropertyPusher(readLayer),\n});\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst ATTRIBUTION_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'Title': makeObjectPropertySetter(readString),\n  'OnlineResource': makeObjectPropertySetter(readHref),\n  'LogoURL': makeObjectPropertySetter(readSizedFormatOnlineresource),\n});\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst EX_GEOGRAPHIC_BOUNDING_BOX_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'westBoundLongitude': makeObjectPropertySetter(readDecimal),\n  'eastBoundLongitude': makeObjectPropertySetter(readDecimal),\n  'southBoundLatitude': makeObjectPropertySetter(readDecimal),\n  'northBoundLatitude': makeObjectPropertySetter(readDecimal),\n});\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst REQUEST_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'GetCapabilities': makeObjectPropertySetter(readOperationType),\n  'GetMap': makeObjectPropertySetter(readOperationType),\n  'GetFeatureInfo': makeObjectPropertySetter(readOperationType),\n});\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst OPERATIONTYPE_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'Format': makeObjectPropertyPusher(readString),\n  'DCPType': makeObjectPropertyPusher(readDCPType),\n});\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst DCPTYPE_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'HTTP': makeObjectPropertySetter(readHTTP),\n});\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst HTTP_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'Get': makeObjectPropertySetter(readFormatOnlineresource),\n  'Post': makeObjectPropertySetter(readFormatOnlineresource),\n});\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst STYLE_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'Name': makeObjectPropertySetter(readString),\n  'Title': makeObjectPropertySetter(readString),\n  'Abstract': makeObjectPropertySetter(readString),\n  'LegendURL': makeObjectPropertyPusher(readSizedFormatOnlineresource),\n  'StyleSheetURL': makeObjectPropertySetter(readFormatOnlineresource),\n  'StyleURL': makeObjectPropertySetter(readFormatOnlineresource),\n});\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst FORMAT_ONLINERESOURCE_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'Format': makeObjectPropertySetter(readString),\n  'OnlineResource': makeObjectPropertySetter(readHref),\n});\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst KEYWORDLIST_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'Keyword': makeArrayPusher(readString),\n});\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {Object|undefined} Attribution object.\n */\nfunction readAttribution(node, objectStack) {\n  return pushParseAndPop({}, ATTRIBUTION_PARSERS, node, objectStack);\n}\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {Object} Bounding box object.\n */\nfunction readBoundingBox(node, objectStack) {\n  const extent = [\n    readDecimalString(node.getAttribute('minx')),\n    readDecimalString(node.getAttribute('miny')),\n    readDecimalString(node.getAttribute('maxx')),\n    readDecimalString(node.getAttribute('maxy')),\n  ];\n\n  const resolutions = [\n    readDecimalString(node.getAttribute('resx')),\n    readDecimalString(node.getAttribute('resy')),\n  ];\n\n  return {\n    'crs': node.getAttribute('CRS'),\n    'extent': extent,\n    'res': resolutions,\n  };\n}\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {import(\"../extent.js\").Extent|undefined} Bounding box object.\n */\nfunction readEXGeographicBoundingBox(node, objectStack) {\n  const geographicBoundingBox = pushParseAndPop(\n    {},\n    EX_GEOGRAPHIC_BOUNDING_BOX_PARSERS,\n    node,\n    objectStack\n  );\n  if (!geographicBoundingBox) {\n    return undefined;\n  }\n  const westBoundLongitude =\n    /** @type {number|undefined} */\n    (geographicBoundingBox['westBoundLongitude']);\n  const southBoundLatitude =\n    /** @type {number|undefined} */\n    (geographicBoundingBox['southBoundLatitude']);\n  const eastBoundLongitude =\n    /** @type {number|undefined} */\n    (geographicBoundingBox['eastBoundLongitude']);\n  const northBoundLatitude =\n    /** @type {number|undefined} */\n    (geographicBoundingBox['northBoundLatitude']);\n  if (\n    westBoundLongitude === undefined ||\n    southBoundLatitude === undefined ||\n    eastBoundLongitude === undefined ||\n    northBoundLatitude === undefined\n  ) {\n    return undefined;\n  }\n  return [\n    westBoundLongitude,\n    southBoundLatitude,\n    eastBoundLongitude,\n    northBoundLatitude,\n  ];\n}\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {Object|undefined} Capability object.\n */\nfunction readCapability(node, objectStack) {\n  return pushParseAndPop({}, CAPABILITY_PARSERS, node, objectStack);\n}\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {Object|undefined} Service object.\n */\nfunction readService(node, objectStack) {\n  return pushParseAndPop({}, SERVICE_PARSERS, node, objectStack);\n}\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {Object|undefined} Contact information object.\n */\nfunction readContactInformation(node, objectStack) {\n  return pushParseAndPop({}, CONTACT_INFORMATION_PARSERS, node, objectStack);\n}\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {Object|undefined} Contact person object.\n */\nfunction readContactPersonPrimary(node, objectStack) {\n  return pushParseAndPop({}, CONTACT_PERSON_PARSERS, node, objectStack);\n}\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {Object|undefined} Contact address object.\n */\nfunction readContactAddress(node, objectStack) {\n  return pushParseAndPop({}, CONTACT_ADDRESS_PARSERS, node, objectStack);\n}\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {Array<string>|undefined} Format array.\n */\nfunction readException(node, objectStack) {\n  return pushParseAndPop([], EXCEPTION_PARSERS, node, objectStack);\n}\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {Object|undefined} Layer object.\n */\nfunction readCapabilityLayer(node, objectStack) {\n  const layerObject = pushParseAndPop({}, LAYER_PARSERS, node, objectStack);\n\n  if (layerObject['Layer'] === undefined) {\n    return Object.assign(layerObject, readLayer(node, objectStack));\n  }\n\n  return layerObject;\n}\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {Object|undefined} Layer object.\n */\nfunction readLayer(node, objectStack) {\n  const parentLayerObject = /**  @type {!Object<string,*>} */ (\n    objectStack[objectStack.length - 1]\n  );\n\n  const layerObject = pushParseAndPop({}, LAYER_PARSERS, node, objectStack);\n\n  if (!layerObject) {\n    return undefined;\n  }\n  let queryable = readBooleanString(node.getAttribute('queryable'));\n  if (queryable === undefined) {\n    queryable = parentLayerObject['queryable'];\n  }\n  layerObject['queryable'] = queryable !== undefined ? queryable : false;\n\n  let cascaded = readNonNegativeIntegerString(node.getAttribute('cascaded'));\n  if (cascaded === undefined) {\n    cascaded = parentLayerObject['cascaded'];\n  }\n  layerObject['cascaded'] = cascaded;\n\n  let opaque = readBooleanString(node.getAttribute('opaque'));\n  if (opaque === undefined) {\n    opaque = parentLayerObject['opaque'];\n  }\n  layerObject['opaque'] = opaque !== undefined ? opaque : false;\n\n  let noSubsets = readBooleanString(node.getAttribute('noSubsets'));\n  if (noSubsets === undefined) {\n    noSubsets = parentLayerObject['noSubsets'];\n  }\n  layerObject['noSubsets'] = noSubsets !== undefined ? noSubsets : false;\n\n  let fixedWidth = readDecimalString(node.getAttribute('fixedWidth'));\n  if (!fixedWidth) {\n    fixedWidth = parentLayerObject['fixedWidth'];\n  }\n  layerObject['fixedWidth'] = fixedWidth;\n\n  let fixedHeight = readDecimalString(node.getAttribute('fixedHeight'));\n  if (!fixedHeight) {\n    fixedHeight = parentLayerObject['fixedHeight'];\n  }\n  layerObject['fixedHeight'] = fixedHeight;\n\n  // See 7.2.4.8\n  const addKeys = ['Style', 'CRS', 'AuthorityURL'];\n  addKeys.forEach(function (key) {\n    if (key in parentLayerObject) {\n      const childValue = layerObject[key] || [];\n      layerObject[key] = childValue.concat(parentLayerObject[key]);\n    }\n  });\n\n  const replaceKeys = [\n    'EX_GeographicBoundingBox',\n    'BoundingBox',\n    'Dimension',\n    'Attribution',\n    'MinScaleDenominator',\n    'MaxScaleDenominator',\n  ];\n  replaceKeys.forEach(function (key) {\n    if (!(key in layerObject)) {\n      const parentValue = parentLayerObject[key];\n      layerObject[key] = parentValue;\n    }\n  });\n\n  return layerObject;\n}\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {Object} Dimension object.\n */\nfunction readDimension(node, objectStack) {\n  const dimensionObject = {\n    'name': node.getAttribute('name'),\n    'units': node.getAttribute('units'),\n    'unitSymbol': node.getAttribute('unitSymbol'),\n    'default': node.getAttribute('default'),\n    'multipleValues': readBooleanString(node.getAttribute('multipleValues')),\n    'nearestValue': readBooleanString(node.getAttribute('nearestValue')),\n    'current': readBooleanString(node.getAttribute('current')),\n    'values': readString(node),\n  };\n  return dimensionObject;\n}\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {Object|undefined} Online resource object.\n */\nfunction readFormatOnlineresource(node, objectStack) {\n  return pushParseAndPop({}, FORMAT_ONLINERESOURCE_PARSERS, node, objectStack);\n}\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {Object|undefined} Request object.\n */\nfunction readRequest(node, objectStack) {\n  return pushParseAndPop({}, REQUEST_PARSERS, node, objectStack);\n}\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {Object|undefined} DCP type object.\n */\nfunction readDCPType(node, objectStack) {\n  return pushParseAndPop({}, DCPTYPE_PARSERS, node, objectStack);\n}\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {Object|undefined} HTTP object.\n */\nfunction readHTTP(node, objectStack) {\n  return pushParseAndPop({}, HTTP_PARSERS, node, objectStack);\n}\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {Object|undefined} Operation type object.\n */\nfunction readOperationType(node, objectStack) {\n  return pushParseAndPop({}, OPERATIONTYPE_PARSERS, node, objectStack);\n}\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {Object|undefined} Online resource object.\n */\nfunction readSizedFormatOnlineresource(node, objectStack) {\n  const formatOnlineresource = readFormatOnlineresource(node, objectStack);\n  if (formatOnlineresource) {\n    const size = [\n      readNonNegativeIntegerString(node.getAttribute('width')),\n      readNonNegativeIntegerString(node.getAttribute('height')),\n    ];\n    formatOnlineresource['size'] = size;\n    return formatOnlineresource;\n  }\n  return undefined;\n}\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {Object|undefined} Authority URL object.\n */\nfunction readAuthorityURL(node, objectStack) {\n  const authorityObject = readFormatOnlineresource(node, objectStack);\n  if (authorityObject) {\n    authorityObject['name'] = node.getAttribute('name');\n    return authorityObject;\n  }\n  return undefined;\n}\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {Object|undefined} Metadata URL object.\n */\nfunction readMetadataURL(node, objectStack) {\n  const metadataObject = readFormatOnlineresource(node, objectStack);\n  if (metadataObject) {\n    metadataObject['type'] = node.getAttribute('type');\n    return metadataObject;\n  }\n  return undefined;\n}\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {Object|undefined} Style object.\n */\nfunction readStyle(node, objectStack) {\n  return pushParseAndPop({}, STYLE_PARSERS, node, objectStack);\n}\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {Array<string>|undefined} Keyword list.\n */\nfunction readKeywordList(node, objectStack) {\n  return pushParseAndPop([], KEYWORDLIST_PARSERS, node, objectStack);\n}\n\nexport default WMSCapabilities;\n","/**\n * @module ol/format/WMSGetFeatureInfo\n */\nimport GML2 from './GML2.js';\nimport XMLFeature from './XMLFeature.js';\nimport {extend} from '../array.js';\nimport {makeArrayPusher, makeStructureNS, pushParseAndPop} from '../xml.js';\n\n/**\n * @typedef {Object} Options\n * @property {Array<string>} [layers] If set, only features of the given layers will be returned by the format when read.\n */\n\n/**\n * @const\n * @type {string}\n */\nconst featureIdentifier = '_feature';\n\n/**\n * @const\n * @type {string}\n */\nconst layerIdentifier = '_layer';\n\n/**\n * @classdesc\n * Format for reading WMSGetFeatureInfo format. It uses\n * {@link module:ol/format/GML2~GML2} to read features.\n *\n * @api\n */\nclass WMSGetFeatureInfo extends XMLFeature {\n  /**\n   * @param {Options} [options] Options.\n   */\n  constructor(options) {\n    super();\n\n    options = options ? options : {};\n\n    /**\n     * @private\n     * @type {string}\n     */\n    this.featureNS_ = 'http://mapserver.gis.umn.edu/mapserver';\n\n    /**\n     * @private\n     * @type {GML2}\n     */\n    this.gmlFormat_ = new GML2();\n\n    /**\n     * @private\n     * @type {Array<string>|null}\n     */\n    this.layers_ = options.layers ? options.layers : null;\n  }\n\n  /**\n   * @return {Array<string>|null} layers\n   */\n  getLayers() {\n    return this.layers_;\n  }\n\n  /**\n   * @param {Array<string>|null} layers Layers to parse.\n   */\n  setLayers(layers) {\n    this.layers_ = layers;\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @param {Array<*>} objectStack Object stack.\n   * @return {Array<import(\"../Feature.js\").default>} Features.\n   * @private\n   */\n  readFeatures_(node, objectStack) {\n    node.setAttribute('namespaceURI', this.featureNS_);\n    const localName = node.localName;\n    /** @type {Array<import(\"../Feature.js\").default>} */\n    let features = [];\n    if (node.childNodes.length === 0) {\n      return features;\n    }\n    if (localName == 'msGMLOutput') {\n      for (let i = 0, ii = node.childNodes.length; i < ii; i++) {\n        const layer = node.childNodes[i];\n        if (layer.nodeType !== Node.ELEMENT_NODE) {\n          continue;\n        }\n\n        const layerElement = /** @type {Element} */ (layer);\n        const context = objectStack[0];\n\n        const toRemove = layerIdentifier;\n        const layerName = layerElement.localName.replace(toRemove, '');\n\n        if (this.layers_ && !this.layers_.includes(layerName)) {\n          continue;\n        }\n\n        const featureType = layerName + featureIdentifier;\n\n        context['featureType'] = featureType;\n        context['featureNS'] = this.featureNS_;\n\n        /** @type {Object<string, import(\"../xml.js\").Parser>} */\n        const parsers = {};\n        parsers[featureType] = makeArrayPusher(\n          this.gmlFormat_.readFeatureElement,\n          this.gmlFormat_\n        );\n        const parsersNS = makeStructureNS(\n          [context['featureNS'], null],\n          parsers\n        );\n        layerElement.setAttribute('namespaceURI', this.featureNS_);\n        const layerFeatures = pushParseAndPop(\n          [],\n          // @ts-ignore\n          parsersNS,\n          layerElement,\n          objectStack,\n          this.gmlFormat_\n        );\n        if (layerFeatures) {\n          extend(features, layerFeatures);\n        }\n      }\n    }\n    if (localName == 'FeatureCollection') {\n      const gmlFeatures = pushParseAndPop(\n        [],\n        this.gmlFormat_.FEATURE_COLLECTION_PARSERS,\n        node,\n        [{}],\n        this.gmlFormat_\n      );\n      if (gmlFeatures) {\n        features = gmlFeatures;\n      }\n    }\n    return features;\n  }\n\n  /**\n   * @protected\n   * @param {Element} node Node.\n   * @param {import(\"./Feature.js\").ReadOptions} [options] Options.\n   * @return {Array<import(\"../Feature.js\").default>} Features.\n   */\n  readFeaturesFromNode(node, options) {\n    const internalOptions = {};\n    if (options) {\n      Object.assign(internalOptions, this.getReadOptions(node, options));\n    }\n    return this.readFeatures_(node, [internalOptions]);\n  }\n}\n\nexport default WMSGetFeatureInfo;\n","/**\n * @module ol/format/WMTSCapabilities\n */\nimport OWS from './OWS.js';\nimport XML from './XML.js';\nimport {boundingExtent} from '../extent.js';\nimport {\n  makeArrayPusher,\n  makeObjectPropertyPusher,\n  makeObjectPropertySetter,\n  makeStructureNS,\n  pushParseAndPop,\n} from '../xml.js';\nimport {readDecimal, readPositiveInteger, readString} from './xsd.js';\nimport {readHref} from './xlink.js';\n\n/**\n * @const\n * @type {Array<null|string>}\n */\nconst NAMESPACE_URIS = [null, 'http://www.opengis.net/wmts/1.0'];\n\n/**\n * @const\n * @type {Array<null|string>}\n */\nconst OWS_NAMESPACE_URIS = [null, 'http://www.opengis.net/ows/1.1'];\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'Contents': makeObjectPropertySetter(readContents),\n});\n\n/**\n * @classdesc\n * Format for reading WMTS capabilities data.\n *\n * @api\n */\nclass WMTSCapabilities extends XML {\n  constructor() {\n    super();\n\n    /**\n     * @type {OWS}\n     * @private\n     */\n    this.owsParser_ = new OWS();\n  }\n\n  /**\n   * @param {Element} node Node.\n   * @return {Object} Object\n   */\n  readFromNode(node) {\n    let version = node.getAttribute('version');\n    if (version) {\n      version = version.trim();\n    }\n    let WMTSCapabilityObject = this.owsParser_.readFromNode(node);\n    if (!WMTSCapabilityObject) {\n      return null;\n    }\n    WMTSCapabilityObject['version'] = version;\n    WMTSCapabilityObject = pushParseAndPop(\n      WMTSCapabilityObject,\n      PARSERS,\n      node,\n      []\n    );\n    return WMTSCapabilityObject ? WMTSCapabilityObject : null;\n  }\n}\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst CONTENTS_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'Layer': makeObjectPropertyPusher(readLayer),\n  'TileMatrixSet': makeObjectPropertyPusher(readTileMatrixSet),\n});\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst LAYER_PARSERS = makeStructureNS(\n  NAMESPACE_URIS,\n  {\n    'Style': makeObjectPropertyPusher(readStyle),\n    'Format': makeObjectPropertyPusher(readString),\n    'TileMatrixSetLink': makeObjectPropertyPusher(readTileMatrixSetLink),\n    'Dimension': makeObjectPropertyPusher(readDimensions),\n    'ResourceURL': makeObjectPropertyPusher(readResourceUrl),\n  },\n  makeStructureNS(OWS_NAMESPACE_URIS, {\n    'Title': makeObjectPropertySetter(readString),\n    'Abstract': makeObjectPropertySetter(readString),\n    'WGS84BoundingBox': makeObjectPropertySetter(readBoundingBox),\n    'Identifier': makeObjectPropertySetter(readString),\n  })\n);\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst STYLE_PARSERS = makeStructureNS(\n  NAMESPACE_URIS,\n  {\n    'LegendURL': makeObjectPropertyPusher(readLegendUrl),\n  },\n  makeStructureNS(OWS_NAMESPACE_URIS, {\n    'Title': makeObjectPropertySetter(readString),\n    'Identifier': makeObjectPropertySetter(readString),\n  })\n);\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst TMS_LINKS_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'TileMatrixSet': makeObjectPropertySetter(readString),\n  'TileMatrixSetLimits': makeObjectPropertySetter(readTileMatrixLimitsList),\n});\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst TMS_LIMITS_LIST_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'TileMatrixLimits': makeArrayPusher(readTileMatrixLimits),\n});\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst TMS_LIMITS_PARSERS = makeStructureNS(NAMESPACE_URIS, {\n  'TileMatrix': makeObjectPropertySetter(readString),\n  'MinTileRow': makeObjectPropertySetter(readPositiveInteger),\n  'MaxTileRow': makeObjectPropertySetter(readPositiveInteger),\n  'MinTileCol': makeObjectPropertySetter(readPositiveInteger),\n  'MaxTileCol': makeObjectPropertySetter(readPositiveInteger),\n});\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst DIMENSION_PARSERS = makeStructureNS(\n  NAMESPACE_URIS,\n  {\n    'Default': makeObjectPropertySetter(readString),\n    'Value': makeObjectPropertyPusher(readString),\n  },\n  makeStructureNS(OWS_NAMESPACE_URIS, {\n    'Identifier': makeObjectPropertySetter(readString),\n  })\n);\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst WGS84_BBOX_READERS = makeStructureNS(OWS_NAMESPACE_URIS, {\n  'LowerCorner': makeArrayPusher(readCoordinates),\n  'UpperCorner': makeArrayPusher(readCoordinates),\n});\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst TMS_PARSERS = makeStructureNS(\n  NAMESPACE_URIS,\n  {\n    'WellKnownScaleSet': makeObjectPropertySetter(readString),\n    'TileMatrix': makeObjectPropertyPusher(readTileMatrix),\n  },\n  makeStructureNS(OWS_NAMESPACE_URIS, {\n    'SupportedCRS': makeObjectPropertySetter(readString),\n    'Identifier': makeObjectPropertySetter(readString),\n    'BoundingBox': makeObjectPropertySetter(readBoundingBox),\n  })\n);\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\n// @ts-ignore\nconst TM_PARSERS = makeStructureNS(\n  NAMESPACE_URIS,\n  {\n    'TopLeftCorner': makeObjectPropertySetter(readCoordinates),\n    'ScaleDenominator': makeObjectPropertySetter(readDecimal),\n    'TileWidth': makeObjectPropertySetter(readPositiveInteger),\n    'TileHeight': makeObjectPropertySetter(readPositiveInteger),\n    'MatrixWidth': makeObjectPropertySetter(readPositiveInteger),\n    'MatrixHeight': makeObjectPropertySetter(readPositiveInteger),\n  },\n  makeStructureNS(OWS_NAMESPACE_URIS, {\n    'Identifier': makeObjectPropertySetter(readString),\n  })\n);\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {Object|undefined} Attribution object.\n */\nfunction readContents(node, objectStack) {\n  return pushParseAndPop({}, CONTENTS_PARSERS, node, objectStack);\n}\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {Object|undefined} Layers object.\n */\nfunction readLayer(node, objectStack) {\n  return pushParseAndPop({}, LAYER_PARSERS, node, objectStack);\n}\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {Object|undefined} Tile Matrix Set object.\n */\nfunction readTileMatrixSet(node, objectStack) {\n  return pushParseAndPop({}, TMS_PARSERS, node, objectStack);\n}\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {Object|undefined} Style object.\n */\nfunction readStyle(node, objectStack) {\n  const style = pushParseAndPop({}, STYLE_PARSERS, node, objectStack);\n  if (!style) {\n    return undefined;\n  }\n  const isDefault = node.getAttribute('isDefault') === 'true';\n  style['isDefault'] = isDefault;\n  return style;\n}\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {Object|undefined} Tile Matrix Set Link object.\n */\nfunction readTileMatrixSetLink(node, objectStack) {\n  return pushParseAndPop({}, TMS_LINKS_PARSERS, node, objectStack);\n}\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {Object|undefined} Dimension object.\n */\nfunction readDimensions(node, objectStack) {\n  return pushParseAndPop({}, DIMENSION_PARSERS, node, objectStack);\n}\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {Object|undefined} Resource URL object.\n */\nfunction readResourceUrl(node, objectStack) {\n  const format = node.getAttribute('format');\n  const template = node.getAttribute('template');\n  const resourceType = node.getAttribute('resourceType');\n  const resource = {};\n  if (format) {\n    resource['format'] = format;\n  }\n  if (template) {\n    resource['template'] = template;\n  }\n  if (resourceType) {\n    resource['resourceType'] = resourceType;\n  }\n  return resource;\n}\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {Object|undefined} BBox object.\n */\nfunction readBoundingBox(node, objectStack) {\n  const coordinates = pushParseAndPop(\n    [],\n    WGS84_BBOX_READERS,\n    node,\n    objectStack\n  );\n  if (coordinates.length != 2) {\n    return undefined;\n  }\n  return boundingExtent(coordinates);\n}\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {Object|undefined} Legend object.\n */\nfunction readLegendUrl(node, objectStack) {\n  const legend = {};\n  legend['format'] = node.getAttribute('format');\n  legend['href'] = readHref(node);\n  return legend;\n}\n\n/**\n * @param {Node} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {Object|undefined} Coordinates object.\n */\nfunction readCoordinates(node, objectStack) {\n  const coordinates = readString(node).split(/\\s+/);\n  if (!coordinates || coordinates.length != 2) {\n    return undefined;\n  }\n  const x = +coordinates[0];\n  const y = +coordinates[1];\n  if (isNaN(x) || isNaN(y)) {\n    return undefined;\n  }\n  return [x, y];\n}\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {Object|undefined} TileMatrix object.\n */\nfunction readTileMatrix(node, objectStack) {\n  return pushParseAndPop({}, TM_PARSERS, node, objectStack);\n}\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {Object|undefined} TileMatrixSetLimits Object.\n */\nfunction readTileMatrixLimitsList(node, objectStack) {\n  return pushParseAndPop([], TMS_LIMITS_LIST_PARSERS, node, objectStack);\n}\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @return {Object|undefined} TileMatrixLimits Array.\n */\nfunction readTileMatrixLimits(node, objectStack) {\n  return pushParseAndPop({}, TMS_LIMITS_PARSERS, node, objectStack);\n}\n\nexport default WMTSCapabilities;\n","/**\n * @module ol/control/FullScreen\n */\nimport Control from './Control.js';\nimport EventType from '../events/EventType.js';\nimport MapProperty from '../MapProperty.js';\nimport {CLASS_CONTROL, CLASS_UNSELECTABLE, CLASS_UNSUPPORTED} from '../css.js';\nimport {listen, unlistenByKey} from '../events.js';\nimport {replaceNode} from '../dom.js';\n\nconst events = [\n  'fullscreenchange',\n  'webkitfullscreenchange',\n  'MSFullscreenChange',\n];\n\n/**\n * @enum {string}\n */\nconst FullScreenEventType = {\n  /**\n   * Triggered after the map entered fullscreen.\n   * @event FullScreenEventType#enterfullscreen\n   * @api\n   */\n  ENTERFULLSCREEN: 'enterfullscreen',\n\n  /**\n   * Triggered after the map leave fullscreen.\n   * @event FullScreenEventType#leavefullscreen\n   * @api\n   */\n  LEAVEFULLSCREEN: 'leavefullscreen',\n};\n\n/***\n * @template Return\n * @typedef {import(\"../Observable\").OnSignature<import(\"../Observable\").EventTypes|\n *     'enterfullscreen'|'leavefullscreen', import(\"../events/Event.js\").default, Return> &\n *   import(\"../Observable\").OnSignature<import(\"../ObjectEventType\").Types, import(\"../Object\").ObjectEvent, Return> &\n *   import(\"../Observable\").CombinedOnSignature<import(\"../Observable\").EventTypes|\n *     'enterfullscreen'|'leavefullscreen'|import(\"../ObjectEventType\").Types, Return>} FullScreenOnSignature\n */\n\n/**\n * @typedef {Object} Options\n * @property {string} [className='ol-full-screen'] CSS class name.\n * @property {string|Text|HTMLElement} [label='\\u2922'] Text label to use for the button.\n * Instead of text, also an element (e.g. a `span` element) can be used.\n * @property {string|Text|HTMLElement} [labelActive='\\u00d7'] Text label to use for the\n * button when full-screen is active.\n * Instead of text, also an element (e.g. a `span` element) can be used.\n * @property {string} [activeClassName=className + '-true'] CSS class name for the button\n * when full-screen is active.\n * @property {string} [inactiveClassName=className + '-false'] CSS class name for the button\n * when full-screen is inactive.\n * @property {string} [tipLabel='Toggle full-screen'] Text label to use for the button tip.\n * @property {boolean} [keys=false] Full keyboard access.\n * @property {HTMLElement|string} [target] Specify a target if you want the\n * control to be rendered outside of the map's viewport.\n * @property {HTMLElement|string} [source] The element to be displayed\n * fullscreen. When not provided, the element containing the map viewport will\n * be displayed fullscreen.\n */\n\n/**\n * @classdesc\n * Provides a button that when clicked fills up the full screen with the map.\n * The full screen source element is by default the element containing the map viewport unless\n * overridden by providing the `source` option. In which case, the dom\n * element introduced using this parameter will be displayed in full screen.\n *\n * When in full screen mode, a close button is shown to exit full screen mode.\n * The [Fullscreen API](https://www.w3.org/TR/fullscreen/) is used to\n * toggle the map in full screen mode.\n *\n * @fires FullScreenEventType#enterfullscreen\n * @fires FullScreenEventType#leavefullscreen\n * @api\n */\nclass FullScreen extends Control {\n  /**\n   * @param {Options} [options] Options.\n   */\n  constructor(options) {\n    options = options ? options : {};\n\n    super({\n      element: document.createElement('div'),\n      target: options.target,\n    });\n\n    /***\n     * @type {FullScreenOnSignature<import(\"../events\").EventsKey>}\n     */\n    this.on;\n\n    /***\n     * @type {FullScreenOnSignature<import(\"../events\").EventsKey>}\n     */\n    this.once;\n\n    /***\n     * @type {FullScreenOnSignature<void>}\n     */\n    this.un;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.keys_ = options.keys !== undefined ? options.keys : false;\n\n    /**\n     * @private\n     * @type {HTMLElement|string|undefined}\n     */\n    this.source_ = options.source;\n\n    /**\n     * @type {boolean}\n     * @private\n     */\n    this.isInFullscreen_ = false;\n\n    /**\n     * @private\n     */\n    this.boundHandleMapTargetChange_ = this.handleMapTargetChange_.bind(this);\n\n    /**\n     * @private\n     * @type {string}\n     */\n    this.cssClassName_ =\n      options.className !== undefined ? options.className : 'ol-full-screen';\n\n    /**\n     * @private\n     * @type {Array<import(\"../events.js\").EventsKey>}\n     */\n    this.documentListeners_ = [];\n\n    /**\n     * @private\n     * @type {Array<string>}\n     */\n    this.activeClassName_ =\n      options.activeClassName !== undefined\n        ? options.activeClassName.split(' ')\n        : [this.cssClassName_ + '-true'];\n\n    /**\n     * @private\n     * @type {Array<string>}\n     */\n    this.inactiveClassName_ =\n      options.inactiveClassName !== undefined\n        ? options.inactiveClassName.split(' ')\n        : [this.cssClassName_ + '-false'];\n\n    const label = options.label !== undefined ? options.label : '\\u2922';\n\n    /**\n     * @private\n     * @type {Text|HTMLElement}\n     */\n    this.labelNode_ =\n      typeof label === 'string' ? document.createTextNode(label) : label;\n\n    const labelActive =\n      options.labelActive !== undefined ? options.labelActive : '\\u00d7';\n\n    /**\n     * @private\n     * @type {Text|HTMLElement}\n     */\n    this.labelActiveNode_ =\n      typeof labelActive === 'string'\n        ? document.createTextNode(labelActive)\n        : labelActive;\n\n    const tipLabel = options.tipLabel ? options.tipLabel : 'Toggle full-screen';\n\n    /**\n     * @private\n     * @type {HTMLElement}\n     */\n    this.button_ = document.createElement('button');\n    this.button_.title = tipLabel;\n    this.button_.setAttribute('type', 'button');\n    this.button_.appendChild(this.labelNode_);\n    this.button_.addEventListener(\n      EventType.CLICK,\n      this.handleClick_.bind(this),\n      false\n    );\n    this.setClassName_(this.button_, this.isInFullscreen_);\n\n    this.element.className = `${this.cssClassName_} ${CLASS_UNSELECTABLE} ${CLASS_CONTROL}`;\n    this.element.appendChild(this.button_);\n  }\n\n  /**\n   * @param {MouseEvent} event The event to handle\n   * @private\n   */\n  handleClick_(event) {\n    event.preventDefault();\n    this.handleFullScreen_();\n  }\n\n  /**\n   * @private\n   */\n  handleFullScreen_() {\n    const map = this.getMap();\n    if (!map) {\n      return;\n    }\n    const doc = map.getOwnerDocument();\n    if (!isFullScreenSupported(doc)) {\n      return;\n    }\n    if (isFullScreen(doc)) {\n      exitFullScreen(doc);\n    } else {\n      let element;\n      if (this.source_) {\n        element =\n          typeof this.source_ === 'string'\n            ? doc.getElementById(this.source_)\n            : this.source_;\n      } else {\n        element = map.getTargetElement();\n      }\n      if (this.keys_) {\n        requestFullScreenWithKeys(element);\n      } else {\n        requestFullScreen(element);\n      }\n    }\n  }\n\n  /**\n   * @private\n   */\n  handleFullScreenChange_() {\n    const map = this.getMap();\n    if (!map) {\n      return;\n    }\n    const wasInFullscreen = this.isInFullscreen_;\n    this.isInFullscreen_ = isFullScreen(map.getOwnerDocument());\n    if (wasInFullscreen !== this.isInFullscreen_) {\n      this.setClassName_(this.button_, this.isInFullscreen_);\n      if (this.isInFullscreen_) {\n        replaceNode(this.labelActiveNode_, this.labelNode_);\n        this.dispatchEvent(FullScreenEventType.ENTERFULLSCREEN);\n      } else {\n        replaceNode(this.labelNode_, this.labelActiveNode_);\n        this.dispatchEvent(FullScreenEventType.LEAVEFULLSCREEN);\n      }\n      map.updateSize();\n    }\n  }\n\n  /**\n   * @param {HTMLElement} element Target element\n   * @param {boolean} fullscreen True if fullscreen class name should be active\n   * @private\n   */\n  setClassName_(element, fullscreen) {\n    if (fullscreen) {\n      element.classList.remove(...this.inactiveClassName_);\n      element.classList.add(...this.activeClassName_);\n    } else {\n      element.classList.remove(...this.activeClassName_);\n      element.classList.add(...this.inactiveClassName_);\n    }\n  }\n\n  /**\n   * Remove the control from its current map and attach it to the new map.\n   * Pass `null` to just remove the control from the current map.\n   * Subclasses may set up event handlers to get notified about changes to\n   * the map here.\n   * @param {import(\"../Map.js\").default|null} map Map.\n   * @api\n   */\n  setMap(map) {\n    const oldMap = this.getMap();\n    if (oldMap) {\n      oldMap.removeChangeListener(\n        MapProperty.TARGET,\n        this.boundHandleMapTargetChange_\n      );\n    }\n\n    super.setMap(map);\n\n    this.handleMapTargetChange_();\n    if (map) {\n      map.addChangeListener(\n        MapProperty.TARGET,\n        this.boundHandleMapTargetChange_\n      );\n    }\n  }\n\n  /**\n   * @private\n   */\n  handleMapTargetChange_() {\n    const listeners = this.documentListeners_;\n    for (let i = 0, ii = listeners.length; i < ii; ++i) {\n      unlistenByKey(listeners[i]);\n    }\n    listeners.length = 0;\n\n    const map = this.getMap();\n    if (map) {\n      const doc = map.getOwnerDocument();\n      if (isFullScreenSupported(doc)) {\n        this.element.classList.remove(CLASS_UNSUPPORTED);\n      } else {\n        this.element.classList.add(CLASS_UNSUPPORTED);\n      }\n\n      for (let i = 0, ii = events.length; i < ii; ++i) {\n        listeners.push(\n          listen(doc, events[i], this.handleFullScreenChange_, this)\n        );\n      }\n      this.handleFullScreenChange_();\n    }\n  }\n}\n\n/**\n * @param {Document} doc The root document to check.\n * @return {boolean} Fullscreen is supported by the current platform.\n */\nfunction isFullScreenSupported(doc) {\n  const body = doc.body;\n  return !!(\n    body['webkitRequestFullscreen'] ||\n    (body.requestFullscreen && doc.fullscreenEnabled)\n  );\n}\n\n/**\n * @param {Document} doc The root document to check.\n * @return {boolean} Element is currently in fullscreen.\n */\nfunction isFullScreen(doc) {\n  return !!(doc['webkitIsFullScreen'] || doc.fullscreenElement);\n}\n\n/**\n * Request to fullscreen an element.\n * @param {HTMLElement} element Element to request fullscreen\n */\nfunction requestFullScreen(element) {\n  if (element.requestFullscreen) {\n    element.requestFullscreen();\n  } else if (element['webkitRequestFullscreen']) {\n    element['webkitRequestFullscreen']();\n  }\n}\n\n/**\n * Request to fullscreen an element with keyboard input.\n * @param {HTMLElement} element Element to request fullscreen\n */\nfunction requestFullScreenWithKeys(element) {\n  if (element['webkitRequestFullscreen']) {\n    element['webkitRequestFullscreen']();\n  } else {\n    requestFullScreen(element);\n  }\n}\n\n/**\n * Exit fullscreen.\n * @param {Document} doc The document to exit fullscren from\n */\nfunction exitFullScreen(doc) {\n  if (doc.exitFullscreen) {\n    doc.exitFullscreen();\n  } else if (doc['webkitExitFullscreen']) {\n    doc['webkitExitFullscreen']();\n  }\n}\n\nexport default FullScreen;\n","/**\n * @module ol/control/MousePosition\n */\n\nimport Control from './Control.js';\nimport EventType from '../pointer/EventType.js';\nimport {\n  get as getProjection,\n  getTransformFromProjections,\n  getUserProjection,\n  identityTransform,\n} from '../proj.js';\nimport {listen} from '../events.js';\nimport {wrapX} from '../coordinate.js';\n\n/**\n * @type {string}\n */\nconst PROJECTION = 'projection';\n\n/**\n * @type {string}\n */\nconst COORDINATE_FORMAT = 'coordinateFormat';\n\n/***\n * @template Return\n * @typedef {import(\"../Observable\").OnSignature<import(\"../Observable\").EventTypes, import(\"../events/Event.js\").default, Return> &\n *   import(\"../Observable\").OnSignature<import(\"../ObjectEventType\").Types|\n *     'change:coordinateFormat'|'change:projection', import(\"../Object\").ObjectEvent, Return> &\n *   import(\"../Observable\").CombinedOnSignature<import(\"../Observable\").EventTypes|import(\"../ObjectEventType\").Types|\n *     'change:coordinateFormat'|'change:projection', Return>} MousePositionOnSignature\n */\n\n/**\n * @typedef {Object} Options\n * @property {string} [className='ol-mouse-position'] CSS class name.\n * @property {import(\"../coordinate.js\").CoordinateFormat} [coordinateFormat] Coordinate format.\n * @property {import(\"../proj.js\").ProjectionLike} [projection] Projection. Default is the view projection.\n * @property {function(import(\"../MapEvent.js\").default):void} [render] Function called when the\n * control should be re-rendered. This is called in a `requestAnimationFrame`\n * callback.\n * @property {HTMLElement|string} [target] Specify a target if you want the\n * control to be rendered outside of the map's viewport.\n * @property {string} [placeholder] Markup to show when the mouse position is not\n * available (e.g. when the pointer leaves the map viewport).  By default, a non-breaking space is rendered\n * initially and the last position is retained when the mouse leaves the viewport.\n * When a string is provided (e.g. `'no position'` or `''` for an empty string) it is used as a\n * placeholder.\n * @property {boolean} [wrapX=true] Wrap the world horizontally on the projection's antimeridian, if it\n * is a global projection.\n */\n\n/**\n * @classdesc\n * A control to show the 2D coordinates of the mouse cursor. By default, these\n * are in the view projection, but can be in any supported projection.\n * By default the control is shown in the top right corner of the map, but this\n * can be changed by using the css selector `.ol-mouse-position`.\n *\n * On touch devices, which usually do not have a mouse cursor, the coordinates\n * of the currently touched position are shown.\n *\n * @api\n */\nclass MousePosition extends Control {\n  /**\n   * @param {Options} [options] Mouse position options.\n   */\n  constructor(options) {\n    options = options ? options : {};\n\n    const element = document.createElement('div');\n    element.className =\n      options.className !== undefined ? options.className : 'ol-mouse-position';\n\n    super({\n      element: element,\n      render: options.render,\n      target: options.target,\n    });\n\n    /***\n     * @type {MousePositionOnSignature<import(\"../events\").EventsKey>}\n     */\n    this.on;\n\n    /***\n     * @type {MousePositionOnSignature<import(\"../events\").EventsKey>}\n     */\n    this.once;\n\n    /***\n     * @type {MousePositionOnSignature<void>}\n     */\n    this.un;\n\n    this.addChangeListener(PROJECTION, this.handleProjectionChanged_);\n\n    if (options.coordinateFormat) {\n      this.setCoordinateFormat(options.coordinateFormat);\n    }\n    if (options.projection) {\n      this.setProjection(options.projection);\n    }\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.renderOnMouseOut_ = options.placeholder !== undefined;\n\n    /**\n     * @private\n     * @type {string}\n     */\n    this.placeholder_ = this.renderOnMouseOut_ ? options.placeholder : '&#160;';\n\n    /**\n     * @private\n     * @type {string}\n     */\n    this.renderedHTML_ = element.innerHTML;\n\n    /**\n     * @private\n     * @type {?import(\"../proj/Projection.js\").default}\n     */\n    this.mapProjection_ = null;\n\n    /**\n     * @private\n     * @type {?import(\"../proj.js\").TransformFunction}\n     */\n    this.transform_ = null;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.wrapX_ = options.wrapX === false ? false : true;\n  }\n\n  /**\n   * @private\n   */\n  handleProjectionChanged_() {\n    this.transform_ = null;\n  }\n\n  /**\n   * Return the coordinate format type used to render the current position or\n   * undefined.\n   * @return {import(\"../coordinate.js\").CoordinateFormat|undefined} The format to render the current\n   *     position in.\n   * @observable\n   * @api\n   */\n  getCoordinateFormat() {\n    return /** @type {import(\"../coordinate.js\").CoordinateFormat|undefined} */ (\n      this.get(COORDINATE_FORMAT)\n    );\n  }\n\n  /**\n   * Return the projection that is used to report the mouse position.\n   * @return {import(\"../proj/Projection.js\").default|undefined} The projection to report mouse\n   *     position in.\n   * @observable\n   * @api\n   */\n  getProjection() {\n    return /** @type {import(\"../proj/Projection.js\").default|undefined} */ (\n      this.get(PROJECTION)\n    );\n  }\n\n  /**\n   * @param {MouseEvent} event Browser event.\n   * @protected\n   */\n  handleMouseMove(event) {\n    const map = this.getMap();\n    this.updateHTML_(map.getEventPixel(event));\n  }\n\n  /**\n   * @param {Event} event Browser event.\n   * @protected\n   */\n  handleMouseOut(event) {\n    this.updateHTML_(null);\n  }\n\n  /**\n   * Remove the control from its current map and attach it to the new map.\n   * Pass `null` to just remove the control from the current map.\n   * Subclasses may set up event handlers to get notified about changes to\n   * the map here.\n   * @param {import(\"../Map.js\").default|null} map Map.\n   * @api\n   */\n  setMap(map) {\n    super.setMap(map);\n    if (map) {\n      const viewport = map.getViewport();\n      this.listenerKeys.push(\n        listen(viewport, EventType.POINTERMOVE, this.handleMouseMove, this)\n      );\n      if (this.renderOnMouseOut_) {\n        this.listenerKeys.push(\n          listen(viewport, EventType.POINTEROUT, this.handleMouseOut, this)\n        );\n      }\n      this.updateHTML_(null);\n    }\n  }\n\n  /**\n   * Set the coordinate format type used to render the current position.\n   * @param {import(\"../coordinate.js\").CoordinateFormat} format The format to render the current\n   *     position in.\n   * @observable\n   * @api\n   */\n  setCoordinateFormat(format) {\n    this.set(COORDINATE_FORMAT, format);\n  }\n\n  /**\n   * Set the projection that is used to report the mouse position.\n   * @param {import(\"../proj.js\").ProjectionLike} projection The projection to report mouse\n   *     position in.\n   * @observable\n   * @api\n   */\n  setProjection(projection) {\n    this.set(PROJECTION, getProjection(projection));\n  }\n\n  /**\n   * @param {?import(\"../pixel.js\").Pixel} pixel Pixel.\n   * @private\n   */\n  updateHTML_(pixel) {\n    let html = this.placeholder_;\n    if (pixel && this.mapProjection_) {\n      if (!this.transform_) {\n        const projection = this.getProjection();\n        if (projection) {\n          this.transform_ = getTransformFromProjections(\n            this.mapProjection_,\n            projection\n          );\n        } else {\n          this.transform_ = identityTransform;\n        }\n      }\n      const map = this.getMap();\n      const coordinate = map.getCoordinateFromPixelInternal(pixel);\n      if (coordinate) {\n        const userProjection = getUserProjection();\n        if (userProjection) {\n          this.transform_ = getTransformFromProjections(\n            this.mapProjection_,\n            userProjection\n          );\n        }\n        this.transform_(coordinate, coordinate);\n        if (this.wrapX_) {\n          const projection =\n            userProjection || this.getProjection() || this.mapProjection_;\n          wrapX(coordinate, projection);\n        }\n        const coordinateFormat = this.getCoordinateFormat();\n        if (coordinateFormat) {\n          html = coordinateFormat(coordinate);\n        } else {\n          html = coordinate.toString();\n        }\n      }\n    }\n    if (!this.renderedHTML_ || html !== this.renderedHTML_) {\n      this.element.innerHTML = html;\n      this.renderedHTML_ = html;\n    }\n  }\n\n  /**\n   * Update the projection. Rendering of the coordinates is done in\n   * `handleMouseMove` and `handleMouseUp`.\n   * @param {import(\"../MapEvent.js\").default} mapEvent Map event.\n   * @override\n   */\n  render(mapEvent) {\n    const frameState = mapEvent.frameState;\n    if (!frameState) {\n      this.mapProjection_ = null;\n    } else {\n      if (this.mapProjection_ != frameState.viewState.projection) {\n        this.mapProjection_ = frameState.viewState.projection;\n        this.transform_ = null;\n      }\n    }\n  }\n}\n\nexport default MousePosition;\n","/**\n * @module ol/control/OverviewMap\n */\nimport Collection from '../Collection.js';\nimport Control from './Control.js';\nimport EventType from '../events/EventType.js';\nimport Map from '../Map.js';\nimport MapEventType from '../MapEventType.js';\nimport MapProperty from '../MapProperty.js';\nimport ObjectEventType from '../ObjectEventType.js';\nimport Overlay from '../Overlay.js';\nimport View from '../View.js';\nimport ViewProperty from '../ViewProperty.js';\nimport {CLASS_COLLAPSED, CLASS_CONTROL, CLASS_UNSELECTABLE} from '../css.js';\nimport {\n  containsExtent,\n  equals as equalsExtent,\n  getBottomRight,\n  getTopLeft,\n  scaleFromCenter,\n} from '../extent.js';\nimport {listen, listenOnce} from '../events.js';\nimport {fromExtent as polygonFromExtent} from '../geom/Polygon.js';\nimport {replaceNode} from '../dom.js';\n\n/**\n * Maximum width and/or height extent ratio that determines when the overview\n * map should be zoomed out.\n * @type {number}\n */\nconst MAX_RATIO = 0.75;\n\n/**\n * Minimum width and/or height extent ratio that determines when the overview\n * map should be zoomed in.\n * @type {number}\n */\nconst MIN_RATIO = 0.1;\n\n/**\n * @typedef {Object} Options\n * @property {string} [className='ol-overviewmap'] CSS class name.\n * @property {boolean} [collapsed=true] Whether the control should start collapsed or not (expanded).\n * @property {string|HTMLElement} [collapseLabel='‹'] Text label to use for the\n * expanded overviewmap button. Instead of text, also an element (e.g. a `span` element) can be used.\n * @property {boolean} [collapsible=true] Whether the control can be collapsed or not.\n * @property {string|HTMLElement} [label='›'] Text label to use for the collapsed\n * overviewmap button. Instead of text, also an element (e.g. a `span` element) can be used.\n * @property {Array<import(\"../layer/Base.js\").default>|import(\"../Collection.js\").default<import(\"../layer/Base.js\").default>} [layers]\n * Layers for the overview map.\n * @property {function(import(\"../MapEvent.js\").default):void} [render] Function called when the control\n * should be re-rendered. This is called in a `requestAnimationFrame` callback.\n * @property {boolean} [rotateWithView=false] Whether the control view should rotate with the main map view.\n * @property {HTMLElement|string} [target] Specify a target if you want the control\n * to be rendered outside of the map's viewport.\n * @property {string} [tipLabel='Overview map'] Text label to use for the button tip.\n * @property {View} [view] Custom view for the overview map (should use same projection as main map). If not provided,\n * a default view with the same projection as the main map will be used.\n */\n\n/**\n * Create a new control with a map acting as an overview map for another\n * defined map.\n *\n * @api\n */\nclass OverviewMap extends Control {\n  /**\n   * @param {Options} [options] OverviewMap options.\n   */\n  constructor(options) {\n    options = options ? options : {};\n\n    super({\n      element: document.createElement('div'),\n      render: options.render,\n      target: options.target,\n    });\n\n    /**\n     * @private\n     */\n    this.boundHandleRotationChanged_ = this.handleRotationChanged_.bind(this);\n\n    /**\n     * @type {boolean}\n     * @private\n     */\n    this.collapsed_ =\n      options.collapsed !== undefined ? options.collapsed : true;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.collapsible_ =\n      options.collapsible !== undefined ? options.collapsible : true;\n\n    if (!this.collapsible_) {\n      this.collapsed_ = false;\n    }\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.rotateWithView_ =\n      options.rotateWithView !== undefined ? options.rotateWithView : false;\n\n    /**\n     * @private\n     * @type {import(\"../extent.js\").Extent|undefined}\n     */\n    this.viewExtent_ = undefined;\n\n    const className =\n      options.className !== undefined ? options.className : 'ol-overviewmap';\n\n    const tipLabel =\n      options.tipLabel !== undefined ? options.tipLabel : 'Overview map';\n\n    const collapseLabel =\n      options.collapseLabel !== undefined ? options.collapseLabel : '\\u2039';\n\n    if (typeof collapseLabel === 'string') {\n      /**\n       * @private\n       * @type {HTMLElement}\n       */\n      this.collapseLabel_ = document.createElement('span');\n      this.collapseLabel_.textContent = collapseLabel;\n    } else {\n      this.collapseLabel_ = collapseLabel;\n    }\n\n    const label = options.label !== undefined ? options.label : '\\u203A';\n\n    if (typeof label === 'string') {\n      /**\n       * @private\n       * @type {HTMLElement}\n       */\n      this.label_ = document.createElement('span');\n      this.label_.textContent = label;\n    } else {\n      this.label_ = label;\n    }\n\n    const activeLabel =\n      this.collapsible_ && !this.collapsed_ ? this.collapseLabel_ : this.label_;\n    const button = document.createElement('button');\n    button.setAttribute('type', 'button');\n    button.title = tipLabel;\n    button.appendChild(activeLabel);\n\n    button.addEventListener(\n      EventType.CLICK,\n      this.handleClick_.bind(this),\n      false\n    );\n\n    /**\n     * @type {HTMLElement}\n     * @private\n     */\n    this.ovmapDiv_ = document.createElement('div');\n    this.ovmapDiv_.className = 'ol-overviewmap-map';\n\n    /**\n     * Explicitly given view to be used instead of a view derived from the main map.\n     * @type {View}\n     * @private\n     */\n    this.view_ = options.view;\n\n    const ovmap = new Map({\n      view: options.view,\n      controls: new Collection(),\n      interactions: new Collection(),\n    });\n\n    /**\n     * @type {Map}\n     * @private\n     */\n    this.ovmap_ = ovmap;\n\n    if (options.layers) {\n      options.layers.forEach(function (layer) {\n        ovmap.addLayer(layer);\n      });\n    }\n\n    const box = document.createElement('div');\n    box.className = 'ol-overviewmap-box';\n    box.style.boxSizing = 'border-box';\n\n    /**\n     * @type {import(\"../Overlay.js\").default}\n     * @private\n     */\n    this.boxOverlay_ = new Overlay({\n      position: [0, 0],\n      positioning: 'center-center',\n      element: box,\n    });\n    this.ovmap_.addOverlay(this.boxOverlay_);\n\n    const cssClasses =\n      className +\n      ' ' +\n      CLASS_UNSELECTABLE +\n      ' ' +\n      CLASS_CONTROL +\n      (this.collapsed_ && this.collapsible_ ? ' ' + CLASS_COLLAPSED : '') +\n      (this.collapsible_ ? '' : ' ol-uncollapsible');\n    const element = this.element;\n    element.className = cssClasses;\n    element.appendChild(this.ovmapDiv_);\n    element.appendChild(button);\n\n    /* Interactive map */\n\n    const scope = this;\n\n    const overlay = this.boxOverlay_;\n    const overlayBox = this.boxOverlay_.getElement();\n\n    /* Functions definition */\n\n    const computeDesiredMousePosition = function (mousePosition) {\n      return {\n        clientX: mousePosition.clientX,\n        clientY: mousePosition.clientY,\n      };\n    };\n\n    const move = function (event) {\n      const position = /** @type {?} */ (computeDesiredMousePosition(event));\n      const coordinates = ovmap.getEventCoordinateInternal(\n        /** @type {MouseEvent} */ (position)\n      );\n\n      overlay.setPosition(coordinates);\n    };\n\n    const endMoving = function (event) {\n      const coordinates = ovmap.getEventCoordinateInternal(event);\n\n      scope.getMap().getView().setCenterInternal(coordinates);\n\n      window.removeEventListener('mousemove', move);\n      window.removeEventListener('mouseup', endMoving);\n    };\n\n    /* Binding */\n\n    overlayBox.addEventListener('mousedown', function () {\n      window.addEventListener('mousemove', move);\n      window.addEventListener('mouseup', endMoving);\n    });\n  }\n\n  /**\n   * Remove the control from its current map and attach it to the new map.\n   * Pass `null` to just remove the control from the current map.\n   * Subclasses may set up event handlers to get notified about changes to\n   * the map here.\n   * @param {import(\"../Map.js\").default|null} map Map.\n   * @api\n   */\n  setMap(map) {\n    const oldMap = this.getMap();\n    if (map === oldMap) {\n      return;\n    }\n    if (oldMap) {\n      const oldView = oldMap.getView();\n      if (oldView) {\n        this.unbindView_(oldView);\n      }\n      this.ovmap_.setTarget(null);\n    }\n    super.setMap(map);\n\n    if (map) {\n      this.ovmap_.setTarget(this.ovmapDiv_);\n      this.listenerKeys.push(\n        listen(\n          map,\n          ObjectEventType.PROPERTYCHANGE,\n          this.handleMapPropertyChange_,\n          this\n        )\n      );\n\n      const view = map.getView();\n      if (view) {\n        this.bindView_(view);\n        if (view.isDef()) {\n          this.ovmap_.updateSize();\n          this.resetExtent_();\n        }\n      }\n\n      if (!this.ovmap_.isRendered()) {\n        this.updateBoxAfterOvmapIsRendered_();\n      }\n    }\n  }\n\n  /**\n   * Handle map property changes.  This only deals with changes to the map's view.\n   * @param {import(\"../Object.js\").ObjectEvent} event The propertychange event.\n   * @private\n   */\n  handleMapPropertyChange_(event) {\n    if (event.key === MapProperty.VIEW) {\n      const oldView = /** @type {import(\"../View.js\").default} */ (\n        event.oldValue\n      );\n      if (oldView) {\n        this.unbindView_(oldView);\n      }\n      const newView = this.getMap().getView();\n      this.bindView_(newView);\n    } else if (\n      !this.ovmap_.isRendered() &&\n      (event.key === MapProperty.TARGET || event.key === MapProperty.SIZE)\n    ) {\n      this.ovmap_.updateSize();\n    }\n  }\n\n  /**\n   * Register listeners for view property changes.\n   * @param {import(\"../View.js\").default} view The view.\n   * @private\n   */\n  bindView_(view) {\n    if (!this.view_) {\n      // Unless an explicit view definition was given, derive default from whatever main map uses.\n      const newView = new View({\n        projection: view.getProjection(),\n      });\n      this.ovmap_.setView(newView);\n    }\n\n    view.addChangeListener(\n      ViewProperty.ROTATION,\n      this.boundHandleRotationChanged_\n    );\n    // Sync once with the new view\n    this.handleRotationChanged_();\n  }\n\n  /**\n   * Unregister listeners for view property changes.\n   * @param {import(\"../View.js\").default} view The view.\n   * @private\n   */\n  unbindView_(view) {\n    view.removeChangeListener(\n      ViewProperty.ROTATION,\n      this.boundHandleRotationChanged_\n    );\n  }\n\n  /**\n   * Handle rotation changes to the main map.\n   * @private\n   */\n  handleRotationChanged_() {\n    if (this.rotateWithView_) {\n      this.ovmap_.getView().setRotation(this.getMap().getView().getRotation());\n    }\n  }\n\n  /**\n   * Reset the overview map extent if the box size (width or\n   * height) is less than the size of the overview map size times minRatio\n   * or is greater than the size of the overview size times maxRatio.\n   *\n   * If the map extent was not reset, the box size can fits in the defined\n   * ratio sizes. This method then checks if is contained inside the overview\n   * map current extent. If not, recenter the overview map to the current\n   * main map center location.\n   * @private\n   */\n  validateExtent_() {\n    const map = this.getMap();\n    const ovmap = this.ovmap_;\n\n    if (!map.isRendered() || !ovmap.isRendered()) {\n      return;\n    }\n\n    const mapSize = /** @type {import(\"../size.js\").Size} */ (map.getSize());\n\n    const view = map.getView();\n    const extent = view.calculateExtentInternal(mapSize);\n\n    if (this.viewExtent_ && equalsExtent(extent, this.viewExtent_)) {\n      // repeats of the same extent may indicate constraint conflicts leading to an endless cycle\n      return;\n    }\n    this.viewExtent_ = extent;\n\n    const ovmapSize = /** @type {import(\"../size.js\").Size} */ (\n      ovmap.getSize()\n    );\n\n    const ovview = ovmap.getView();\n    const ovextent = ovview.calculateExtentInternal(ovmapSize);\n\n    const topLeftPixel = ovmap.getPixelFromCoordinateInternal(\n      getTopLeft(extent)\n    );\n    const bottomRightPixel = ovmap.getPixelFromCoordinateInternal(\n      getBottomRight(extent)\n    );\n\n    const boxWidth = Math.abs(topLeftPixel[0] - bottomRightPixel[0]);\n    const boxHeight = Math.abs(topLeftPixel[1] - bottomRightPixel[1]);\n\n    const ovmapWidth = ovmapSize[0];\n    const ovmapHeight = ovmapSize[1];\n\n    if (\n      boxWidth < ovmapWidth * MIN_RATIO ||\n      boxHeight < ovmapHeight * MIN_RATIO ||\n      boxWidth > ovmapWidth * MAX_RATIO ||\n      boxHeight > ovmapHeight * MAX_RATIO\n    ) {\n      this.resetExtent_();\n    } else if (!containsExtent(ovextent, extent)) {\n      this.recenter_();\n    }\n  }\n\n  /**\n   * Reset the overview map extent to half calculated min and max ratio times\n   * the extent of the main map.\n   * @private\n   */\n  resetExtent_() {\n    if (MAX_RATIO === 0 || MIN_RATIO === 0) {\n      return;\n    }\n\n    const map = this.getMap();\n    const ovmap = this.ovmap_;\n\n    const mapSize = /** @type {import(\"../size.js\").Size} */ (map.getSize());\n\n    const view = map.getView();\n    const extent = view.calculateExtentInternal(mapSize);\n\n    const ovview = ovmap.getView();\n\n    // get how many times the current map overview could hold different\n    // box sizes using the min and max ratio, pick the step in the middle used\n    // to calculate the extent from the main map to set it to the overview map,\n    const steps = Math.log(MAX_RATIO / MIN_RATIO) / Math.LN2;\n    const ratio = 1 / (Math.pow(2, steps / 2) * MIN_RATIO);\n    scaleFromCenter(extent, ratio);\n    ovview.fitInternal(polygonFromExtent(extent));\n  }\n\n  /**\n   * Set the center of the overview map to the map center without changing its\n   * resolution.\n   * @private\n   */\n  recenter_() {\n    const map = this.getMap();\n    const ovmap = this.ovmap_;\n\n    const view = map.getView();\n\n    const ovview = ovmap.getView();\n\n    ovview.setCenterInternal(view.getCenterInternal());\n  }\n\n  /**\n   * Update the box using the main map extent\n   * @private\n   */\n  updateBox_() {\n    const map = this.getMap();\n    const ovmap = this.ovmap_;\n\n    if (!map.isRendered() || !ovmap.isRendered()) {\n      return;\n    }\n\n    const mapSize = /** @type {import(\"../size.js\").Size} */ (map.getSize());\n\n    const view = map.getView();\n\n    const ovview = ovmap.getView();\n\n    const rotation = this.rotateWithView_ ? 0 : -view.getRotation();\n\n    const overlay = this.boxOverlay_;\n    const box = this.boxOverlay_.getElement();\n    const center = view.getCenterInternal();\n    const resolution = view.getResolution();\n    const ovresolution = ovview.getResolution();\n    const width = (mapSize[0] * resolution) / ovresolution;\n    const height = (mapSize[1] * resolution) / ovresolution;\n\n    // set position using center coordinates\n    overlay.setPosition(center);\n\n    // set box size calculated from map extent size and overview map resolution\n    if (box) {\n      box.style.width = width + 'px';\n      box.style.height = height + 'px';\n      const transform = 'rotate(' + rotation + 'rad)';\n      box.style.transform = transform;\n    }\n  }\n\n  /**\n   * @private\n   */\n  updateBoxAfterOvmapIsRendered_() {\n    if (this.ovmapPostrenderKey_) {\n      return;\n    }\n    this.ovmapPostrenderKey_ = listenOnce(\n      this.ovmap_,\n      MapEventType.POSTRENDER,\n      function (event) {\n        delete this.ovmapPostrenderKey_;\n        this.updateBox_();\n      },\n      this\n    );\n  }\n\n  /**\n   * @param {MouseEvent} event The event to handle\n   * @private\n   */\n  handleClick_(event) {\n    event.preventDefault();\n    this.handleToggle_();\n  }\n\n  /**\n   * @private\n   */\n  handleToggle_() {\n    this.element.classList.toggle(CLASS_COLLAPSED);\n    if (this.collapsed_) {\n      replaceNode(this.collapseLabel_, this.label_);\n    } else {\n      replaceNode(this.label_, this.collapseLabel_);\n    }\n    this.collapsed_ = !this.collapsed_;\n\n    // manage overview map if it had not been rendered before and control\n    // is expanded\n    const ovmap = this.ovmap_;\n    if (!this.collapsed_) {\n      if (ovmap.isRendered()) {\n        this.viewExtent_ = undefined;\n        ovmap.render();\n        return;\n      }\n      ovmap.updateSize();\n      this.resetExtent_();\n      this.updateBoxAfterOvmapIsRendered_();\n    }\n  }\n\n  /**\n   * Return `true` if the overview map is collapsible, `false` otherwise.\n   * @return {boolean} True if the widget is collapsible.\n   * @api\n   */\n  getCollapsible() {\n    return this.collapsible_;\n  }\n\n  /**\n   * Set whether the overview map should be collapsible.\n   * @param {boolean} collapsible True if the widget is collapsible.\n   * @api\n   */\n  setCollapsible(collapsible) {\n    if (this.collapsible_ === collapsible) {\n      return;\n    }\n    this.collapsible_ = collapsible;\n    this.element.classList.toggle('ol-uncollapsible');\n    if (!collapsible && this.collapsed_) {\n      this.handleToggle_();\n    }\n  }\n\n  /**\n   * Collapse or expand the overview map according to the passed parameter. Will\n   * not do anything if the overview map isn't collapsible or if the current\n   * collapsed state is already the one requested.\n   * @param {boolean} collapsed True if the widget is collapsed.\n   * @api\n   */\n  setCollapsed(collapsed) {\n    if (!this.collapsible_ || this.collapsed_ === collapsed) {\n      return;\n    }\n    this.handleToggle_();\n  }\n\n  /**\n   * Determine if the overview map is collapsed.\n   * @return {boolean} The overview map is collapsed.\n   * @api\n   */\n  getCollapsed() {\n    return this.collapsed_;\n  }\n\n  /**\n   * Return `true` if the overview map view can rotate, `false` otherwise.\n   * @return {boolean} True if the control view can rotate.\n   * @api\n   */\n  getRotateWithView() {\n    return this.rotateWithView_;\n  }\n\n  /**\n   * Set whether the overview map view should rotate with the main map view.\n   * @param {boolean} rotateWithView True if the control view should rotate.\n   * @api\n   */\n  setRotateWithView(rotateWithView) {\n    if (this.rotateWithView_ === rotateWithView) {\n      return;\n    }\n    this.rotateWithView_ = rotateWithView;\n    if (this.getMap().getView().getRotation() !== 0) {\n      if (this.rotateWithView_) {\n        this.handleRotationChanged_();\n      } else {\n        this.ovmap_.getView().setRotation(0);\n      }\n      this.viewExtent_ = undefined;\n      this.validateExtent_();\n      this.updateBox_();\n    }\n  }\n\n  /**\n   * Return the overview map.\n   * @return {import(\"../Map.js\").default} Overview map.\n   * @api\n   */\n  getOverviewMap() {\n    return this.ovmap_;\n  }\n\n  /**\n   * Update the overview map element.\n   * @param {import(\"../MapEvent.js\").default} mapEvent Map event.\n   * @override\n   */\n  render(mapEvent) {\n    this.validateExtent_();\n    this.updateBox_();\n  }\n}\n\nexport default OverviewMap;\n","/**\n * @module ol/control/ScaleLine\n */\nimport Control from './Control.js';\nimport {CLASS_UNSELECTABLE} from '../css.js';\nimport {METERS_PER_UNIT, getPointResolution} from '../proj.js';\nimport {assert} from '../asserts.js';\n\n/**\n * @type {string}\n */\nconst UNITS_PROP = 'units';\n\n/**\n * @typedef {'degrees' | 'imperial' | 'nautical' | 'metric' | 'us'} Units\n * Units for the scale line.\n */\n\n/**\n * @const\n * @type {Array<number>}\n */\nconst LEADING_DIGITS = [1, 2, 5];\n\n/**\n * @const\n * @type {number}\n */\nconst DEFAULT_DPI = 25.4 / 0.28;\n\n/***\n * @template Return\n * @typedef {import(\"../Observable\").OnSignature<import(\"../Observable\").EventTypes, import(\"../events/Event.js\").default, Return> &\n *   import(\"../Observable\").OnSignature<import(\"../ObjectEventType\").Types|\n *     'change:units', import(\"../Object\").ObjectEvent, Return> &\n *   import(\"../Observable\").CombinedOnSignature<import(\"../Observable\").EventTypes|import(\"../ObjectEventType\").Types\n *     |'change:units', Return>} ScaleLineOnSignature\n */\n\n/**\n * @typedef {Object} Options\n * @property {string} [className] CSS class name. The default is `ol-scale-bar` when configured with\n * `bar: true`. Otherwise the default is `ol-scale-line`.\n * @property {number} [minWidth=64] Minimum width in pixels at the OGC default dpi. The width will be\n * adjusted to match the dpi used.\n * @property {number} [maxWidth] Maximum width in pixels at the OGC default dpi. The width will be\n * adjusted to match the dpi used.\n * @property {function(import(\"../MapEvent.js\").default):void} [render] Function called when the control\n * should be re-rendered. This is called in a `requestAnimationFrame` callback.\n * @property {HTMLElement|string} [target] Specify a target if you want the control\n * to be rendered outside of the map's viewport.\n * @property {Units} [units='metric'] Units.\n * @property {boolean} [bar=false] Render scalebars instead of a line.\n * @property {number} [steps=4] Number of steps the scalebar should use. Use even numbers\n * for best results. Only applies when `bar` is `true`.\n * @property {boolean} [text=false] Render the text scale above of the scalebar. Only applies\n * when `bar` is `true`.\n * @property {number|undefined} [dpi=undefined] dpi of output device such as printer. Only applies\n * when `bar` is `true`. If undefined the OGC default screen pixel size of 0.28mm will be assumed.\n */\n\n/**\n * @classdesc\n * A control displaying rough y-axis distances, calculated for the center of the\n * viewport. For conformal projections (e.g. EPSG:3857, the default view\n * projection in OpenLayers), the scale is valid for all directions.\n * No scale line will be shown when the y-axis distance of a pixel at the\n * viewport center cannot be calculated in the view projection.\n * By default the scale line will show in the bottom left portion of the map,\n * but this can be changed by using the css selector `.ol-scale-line`.\n * When specifying `bar` as `true`, a scalebar will be rendered instead\n * of a scaleline.\n *\n * @api\n */\nclass ScaleLine extends Control {\n  /**\n   * @param {Options} [options] Scale line options.\n   */\n  constructor(options) {\n    options = options ? options : {};\n\n    const element = document.createElement('div');\n    element.style.pointerEvents = 'none';\n\n    super({\n      element: element,\n      render: options.render,\n      target: options.target,\n    });\n\n    /***\n     * @type {ScaleLineOnSignature<import(\"../events\").EventsKey>}\n     */\n    this.on;\n\n    /***\n     * @type {ScaleLineOnSignature<import(\"../events\").EventsKey>}\n     */\n    this.once;\n\n    /***\n     * @type {ScaleLineOnSignature<void>}\n     */\n    this.un;\n\n    const className =\n      options.className !== undefined\n        ? options.className\n        : options.bar\n        ? 'ol-scale-bar'\n        : 'ol-scale-line';\n\n    /**\n     * @private\n     * @type {HTMLElement}\n     */\n    this.innerElement_ = document.createElement('div');\n    this.innerElement_.className = className + '-inner';\n\n    this.element.className = className + ' ' + CLASS_UNSELECTABLE;\n    this.element.appendChild(this.innerElement_);\n\n    /**\n     * @private\n     * @type {?import(\"../View.js\").State}\n     */\n    this.viewState_ = null;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.minWidth_ = options.minWidth !== undefined ? options.minWidth : 64;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.maxWidth_ = options.maxWidth;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.renderedVisible_ = false;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.renderedWidth_ = undefined;\n\n    /**\n     * @private\n     * @type {string}\n     */\n    this.renderedHTML_ = '';\n\n    this.addChangeListener(UNITS_PROP, this.handleUnitsChanged_);\n\n    this.setUnits(options.units || 'metric');\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.scaleBar_ = options.bar || false;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.scaleBarSteps_ = options.steps || 4;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.scaleBarText_ = options.text || false;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.dpi_ = options.dpi || undefined;\n  }\n\n  /**\n   * Return the units to use in the scale line.\n   * @return {Units} The units\n   * to use in the scale line.\n   * @observable\n   * @api\n   */\n  getUnits() {\n    return this.get(UNITS_PROP);\n  }\n\n  /**\n   * @private\n   */\n  handleUnitsChanged_() {\n    this.updateElement_();\n  }\n\n  /**\n   * Set the units to use in the scale line.\n   * @param {Units} units The units to use in the scale line.\n   * @observable\n   * @api\n   */\n  setUnits(units) {\n    this.set(UNITS_PROP, units);\n  }\n\n  /**\n   * Specify the dpi of output device such as printer.\n   * @param {number|undefined} dpi The dpi of output device.\n   * @api\n   */\n  setDpi(dpi) {\n    this.dpi_ = dpi;\n  }\n\n  /**\n   * @private\n   */\n  updateElement_() {\n    const viewState = this.viewState_;\n\n    if (!viewState) {\n      if (this.renderedVisible_) {\n        this.element.style.display = 'none';\n        this.renderedVisible_ = false;\n      }\n      return;\n    }\n\n    const center = viewState.center;\n    const projection = viewState.projection;\n    const units = this.getUnits();\n    const pointResolutionUnits = units == 'degrees' ? 'degrees' : 'm';\n    let pointResolution = getPointResolution(\n      projection,\n      viewState.resolution,\n      center,\n      pointResolutionUnits\n    );\n\n    const minWidth =\n      (this.minWidth_ * (this.dpi_ || DEFAULT_DPI)) / DEFAULT_DPI;\n\n    const maxWidth =\n      this.maxWidth_ !== undefined\n        ? (this.maxWidth_ * (this.dpi_ || DEFAULT_DPI)) / DEFAULT_DPI\n        : undefined;\n\n    let nominalCount = minWidth * pointResolution;\n    let suffix = '';\n    if (units == 'degrees') {\n      const metersPerDegree = METERS_PER_UNIT.degrees;\n      nominalCount *= metersPerDegree;\n      if (nominalCount < metersPerDegree / 60) {\n        suffix = '\\u2033'; // seconds\n        pointResolution *= 3600;\n      } else if (nominalCount < metersPerDegree) {\n        suffix = '\\u2032'; // minutes\n        pointResolution *= 60;\n      } else {\n        suffix = '\\u00b0'; // degrees\n      }\n    } else if (units == 'imperial') {\n      if (nominalCount < 0.9144) {\n        suffix = 'in';\n        pointResolution /= 0.0254;\n      } else if (nominalCount < 1609.344) {\n        suffix = 'ft';\n        pointResolution /= 0.3048;\n      } else {\n        suffix = 'mi';\n        pointResolution /= 1609.344;\n      }\n    } else if (units == 'nautical') {\n      pointResolution /= 1852;\n      suffix = 'NM';\n    } else if (units == 'metric') {\n      if (nominalCount < 0.001) {\n        suffix = 'μm';\n        pointResolution *= 1000000;\n      } else if (nominalCount < 1) {\n        suffix = 'mm';\n        pointResolution *= 1000;\n      } else if (nominalCount < 1000) {\n        suffix = 'm';\n      } else {\n        suffix = 'km';\n        pointResolution /= 1000;\n      }\n    } else if (units == 'us') {\n      if (nominalCount < 0.9144) {\n        suffix = 'in';\n        pointResolution *= 39.37;\n      } else if (nominalCount < 1609.344) {\n        suffix = 'ft';\n        pointResolution /= 0.30480061;\n      } else {\n        suffix = 'mi';\n        pointResolution /= 1609.3472;\n      }\n    } else {\n      assert(false, 33); // Invalid units\n    }\n\n    let i = 3 * Math.floor(Math.log(minWidth * pointResolution) / Math.log(10));\n    let count, width, decimalCount;\n    let previousCount, previousWidth, previousDecimalCount;\n    while (true) {\n      decimalCount = Math.floor(i / 3);\n      const decimal = Math.pow(10, decimalCount);\n      count = LEADING_DIGITS[((i % 3) + 3) % 3] * decimal;\n      width = Math.round(count / pointResolution);\n      if (isNaN(width)) {\n        this.element.style.display = 'none';\n        this.renderedVisible_ = false;\n        return;\n      }\n      if (maxWidth !== undefined && width >= maxWidth) {\n        count = previousCount;\n        width = previousWidth;\n        decimalCount = previousDecimalCount;\n        break;\n      } else if (width >= minWidth) {\n        break;\n      }\n      previousCount = count;\n      previousWidth = width;\n      previousDecimalCount = decimalCount;\n      ++i;\n    }\n    const html = this.scaleBar_\n      ? this.createScaleBar(width, count, suffix)\n      : count.toFixed(decimalCount < 0 ? -decimalCount : 0) + ' ' + suffix;\n\n    if (this.renderedHTML_ != html) {\n      this.innerElement_.innerHTML = html;\n      this.renderedHTML_ = html;\n    }\n\n    if (this.renderedWidth_ != width) {\n      this.innerElement_.style.width = width + 'px';\n      this.renderedWidth_ = width;\n    }\n\n    if (!this.renderedVisible_) {\n      this.element.style.display = '';\n      this.renderedVisible_ = true;\n    }\n  }\n\n  /**\n   * @private\n   * @param {number} width The current width of the scalebar.\n   * @param {number} scale The current scale.\n   * @param {string} suffix The suffix to append to the scale text.\n   * @return {string} The stringified HTML of the scalebar.\n   */\n  createScaleBar(width, scale, suffix) {\n    const resolutionScale = this.getScaleForResolution();\n    const mapScale =\n      resolutionScale < 1\n        ? Math.round(1 / resolutionScale).toLocaleString() + ' : 1'\n        : '1 : ' + Math.round(resolutionScale).toLocaleString();\n    const steps = this.scaleBarSteps_;\n    const stepWidth = width / steps;\n    const scaleSteps = [this.createMarker('absolute')];\n    for (let i = 0; i < steps; ++i) {\n      const cls =\n        i % 2 === 0 ? 'ol-scale-singlebar-odd' : 'ol-scale-singlebar-even';\n      scaleSteps.push(\n        '<div>' +\n          '<div ' +\n          `class=\"ol-scale-singlebar ${cls}\" ` +\n          `style=\"width: ${stepWidth}px;\"` +\n          '>' +\n          '</div>' +\n          this.createMarker('relative') +\n          // render text every second step, except when only 2 steps\n          (i % 2 === 0 || steps === 2\n            ? this.createStepText(i, width, false, scale, suffix)\n            : '') +\n          '</div>'\n      );\n    }\n    // render text at the end\n    scaleSteps.push(this.createStepText(steps, width, true, scale, suffix));\n\n    const scaleBarText = this.scaleBarText_\n      ? `<div class=\"ol-scale-text\" style=\"width: ${width}px;\">` +\n        mapScale +\n        '</div>'\n      : '';\n    return scaleBarText + scaleSteps.join('');\n  }\n\n  /**\n   * Creates a marker at given position\n   * @param {'absolute'|'relative'} position The position, absolute or relative\n   * @return {string} The stringified div containing the marker\n   */\n  createMarker(position) {\n    const top = position === 'absolute' ? 3 : -10;\n    return (\n      '<div ' +\n      'class=\"ol-scale-step-marker\" ' +\n      `style=\"position: ${position}; top: ${top}px;\"` +\n      '></div>'\n    );\n  }\n\n  /**\n   * Creates the label for a marker marker at given position\n   * @param {number} i The iterator\n   * @param {number} width The width the scalebar will currently use\n   * @param {boolean} isLast Flag indicating if we add the last step text\n   * @param {number} scale The current scale for the whole scalebar\n   * @param {string} suffix The suffix for the scale\n   * @return {string} The stringified div containing the step text\n   */\n  createStepText(i, width, isLast, scale, suffix) {\n    const length =\n      i === 0 ? 0 : Math.round((scale / this.scaleBarSteps_) * i * 100) / 100;\n    const lengthString = length + (i === 0 ? '' : ' ' + suffix);\n    const margin = i === 0 ? -3 : (width / this.scaleBarSteps_) * -1;\n    const minWidth = i === 0 ? 0 : (width / this.scaleBarSteps_) * 2;\n    return (\n      '<div ' +\n      'class=\"ol-scale-step-text\" ' +\n      'style=\"' +\n      `margin-left: ${margin}px;` +\n      `text-align: ${i === 0 ? 'left' : 'center'};` +\n      `min-width: ${minWidth}px;` +\n      `left: ${isLast ? width + 'px' : 'unset'};` +\n      '\">' +\n      lengthString +\n      '</div>'\n    );\n  }\n\n  /**\n   * Returns the appropriate scale for the given resolution and units.\n   * @return {number} The appropriate scale.\n   */\n  getScaleForResolution() {\n    const resolution = getPointResolution(\n      this.viewState_.projection,\n      this.viewState_.resolution,\n      this.viewState_.center,\n      'm'\n    );\n    const dpi = this.dpi_ || DEFAULT_DPI;\n    const inchesPerMeter = 1000 / 25.4;\n    return resolution * inchesPerMeter * dpi;\n  }\n\n  /**\n   * Update the scale line element.\n   * @param {import(\"../MapEvent.js\").default} mapEvent Map event.\n   * @override\n   */\n  render(mapEvent) {\n    const frameState = mapEvent.frameState;\n    if (!frameState) {\n      this.viewState_ = null;\n    } else {\n      this.viewState_ = frameState.viewState;\n    }\n    this.updateElement_();\n  }\n}\n\nexport default ScaleLine;\n","/**\n * @module ol/control/ZoomSlider\n */\n\nimport Control from './Control.js';\nimport EventType from '../events/EventType.js';\nimport PointerEventType from '../pointer/EventType.js';\nimport {CLASS_CONTROL, CLASS_UNSELECTABLE} from '../css.js';\nimport {clamp} from '../math.js';\nimport {easeOut} from '../easing.js';\nimport {listen, unlistenByKey} from '../events.js';\nimport {stopPropagation} from '../events/Event.js';\n\n/**\n * The enum for available directions.\n *\n * @enum {number}\n */\nconst Direction = {\n  VERTICAL: 0,\n  HORIZONTAL: 1,\n};\n\n/**\n * @typedef {Object} Options\n * @property {string} [className='ol-zoomslider'] CSS class name.\n * @property {number} [duration=200] Animation duration in milliseconds.\n * @property {function(import(\"../MapEvent.js\").default):void} [render] Function called when the control\n * should be re-rendered. This is called in a `requestAnimationFrame` callback.\n * @property {HTMLElement|string} [target] Specify a target if you want the control to be\n * rendered outside of the map's viewport.\n */\n\n/**\n * @classdesc\n * A slider type of control for zooming.\n *\n * Example:\n *\n *     map.addControl(new ZoomSlider());\n *\n * @api\n */\nclass ZoomSlider extends Control {\n  /**\n   * @param {Options} [options] Zoom slider options.\n   */\n  constructor(options) {\n    options = options ? options : {};\n\n    super({\n      target: options.target,\n      element: document.createElement('div'),\n      render: options.render,\n    });\n\n    /**\n     * @type {!Array<import(\"../events.js\").EventsKey>}\n     * @private\n     */\n    this.dragListenerKeys_ = [];\n\n    /**\n     * Will hold the current resolution of the view.\n     *\n     * @type {number|undefined}\n     * @private\n     */\n    this.currentResolution_ = undefined;\n\n    /**\n     * The direction of the slider. Will be determined from actual display of the\n     * container and defaults to Direction.VERTICAL.\n     *\n     * @type {Direction}\n     * @private\n     */\n    this.direction_ = Direction.VERTICAL;\n\n    /**\n     * @type {boolean}\n     * @private\n     */\n    this.dragging_;\n\n    /**\n     * @type {number}\n     * @private\n     */\n    this.heightLimit_ = 0;\n\n    /**\n     * @type {number}\n     * @private\n     */\n    this.widthLimit_ = 0;\n\n    /**\n     * @type {number|undefined}\n     * @private\n     */\n    this.startX_;\n\n    /**\n     * @type {number|undefined}\n     * @private\n     */\n    this.startY_;\n\n    /**\n     * The calculated thumb size (border box plus margins).  Set when initSlider_\n     * is called.\n     * @type {import(\"../size.js\").Size}\n     * @private\n     */\n    this.thumbSize_ = null;\n\n    /**\n     * Whether the slider is initialized.\n     * @type {boolean}\n     * @private\n     */\n    this.sliderInitialized_ = false;\n\n    /**\n     * @type {number}\n     * @private\n     */\n    this.duration_ = options.duration !== undefined ? options.duration : 200;\n\n    const className =\n      options.className !== undefined ? options.className : 'ol-zoomslider';\n    const thumbElement = document.createElement('button');\n    thumbElement.setAttribute('type', 'button');\n    thumbElement.className = className + '-thumb ' + CLASS_UNSELECTABLE;\n    const containerElement = this.element;\n    containerElement.className =\n      className + ' ' + CLASS_UNSELECTABLE + ' ' + CLASS_CONTROL;\n    containerElement.appendChild(thumbElement);\n\n    containerElement.addEventListener(\n      PointerEventType.POINTERDOWN,\n      this.handleDraggerStart_.bind(this),\n      false\n    );\n    containerElement.addEventListener(\n      PointerEventType.POINTERMOVE,\n      this.handleDraggerDrag_.bind(this),\n      false\n    );\n    containerElement.addEventListener(\n      PointerEventType.POINTERUP,\n      this.handleDraggerEnd_.bind(this),\n      false\n    );\n\n    containerElement.addEventListener(\n      EventType.CLICK,\n      this.handleContainerClick_.bind(this),\n      false\n    );\n    thumbElement.addEventListener(EventType.CLICK, stopPropagation, false);\n  }\n\n  /**\n   * Remove the control from its current map and attach it to the new map.\n   * Pass `null` to just remove the control from the current map.\n   * Subclasses may set up event handlers to get notified about changes to\n   * the map here.\n   * @param {import(\"../Map.js\").default|null} map Map.\n   * @api\n   */\n  setMap(map) {\n    super.setMap(map);\n    if (map) {\n      map.render();\n    }\n  }\n\n  /**\n   * Initializes the slider element. This will determine and set this controls\n   * direction_ and also constrain the dragging of the thumb to always be within\n   * the bounds of the container.\n   *\n   * @return {boolean} Initialization successful\n   * @private\n   */\n  initSlider_() {\n    const container = this.element;\n    let containerWidth = container.offsetWidth;\n    let containerHeight = container.offsetHeight;\n    if (containerWidth === 0 && containerHeight === 0) {\n      return (this.sliderInitialized_ = false);\n    }\n\n    const containerStyle = getComputedStyle(container);\n    containerWidth -=\n      parseFloat(containerStyle['paddingRight']) +\n      parseFloat(containerStyle['paddingLeft']);\n    containerHeight -=\n      parseFloat(containerStyle['paddingTop']) +\n      parseFloat(containerStyle['paddingBottom']);\n    const thumb = /** @type {HTMLElement} */ (container.firstElementChild);\n    const thumbStyle = getComputedStyle(thumb);\n    const thumbWidth =\n      thumb.offsetWidth +\n      parseFloat(thumbStyle['marginRight']) +\n      parseFloat(thumbStyle['marginLeft']);\n    const thumbHeight =\n      thumb.offsetHeight +\n      parseFloat(thumbStyle['marginTop']) +\n      parseFloat(thumbStyle['marginBottom']);\n    this.thumbSize_ = [thumbWidth, thumbHeight];\n\n    if (containerWidth > containerHeight) {\n      this.direction_ = Direction.HORIZONTAL;\n      this.widthLimit_ = containerWidth - thumbWidth;\n    } else {\n      this.direction_ = Direction.VERTICAL;\n      this.heightLimit_ = containerHeight - thumbHeight;\n    }\n    return (this.sliderInitialized_ = true);\n  }\n\n  /**\n   * @param {PointerEvent} event The browser event to handle.\n   * @private\n   */\n  handleContainerClick_(event) {\n    const view = this.getMap().getView();\n\n    const relativePosition = this.getRelativePosition_(\n      event.offsetX - this.thumbSize_[0] / 2,\n      event.offsetY - this.thumbSize_[1] / 2\n    );\n\n    const resolution = this.getResolutionForPosition_(relativePosition);\n    const zoom = view.getConstrainedZoom(view.getZoomForResolution(resolution));\n\n    view.animateInternal({\n      zoom: zoom,\n      duration: this.duration_,\n      easing: easeOut,\n    });\n  }\n\n  /**\n   * Handle dragger start events.\n   * @param {PointerEvent} event The drag event.\n   * @private\n   */\n  handleDraggerStart_(event) {\n    if (!this.dragging_ && event.target === this.element.firstElementChild) {\n      const element = /** @type {HTMLElement} */ (\n        this.element.firstElementChild\n      );\n      this.getMap().getView().beginInteraction();\n      this.startX_ = event.clientX - parseFloat(element.style.left);\n      this.startY_ = event.clientY - parseFloat(element.style.top);\n      this.dragging_ = true;\n\n      if (this.dragListenerKeys_.length === 0) {\n        const drag = this.handleDraggerDrag_;\n        const end = this.handleDraggerEnd_;\n        const doc = this.getMap().getOwnerDocument();\n        this.dragListenerKeys_.push(\n          listen(doc, PointerEventType.POINTERMOVE, drag, this),\n          listen(doc, PointerEventType.POINTERUP, end, this)\n        );\n      }\n    }\n  }\n\n  /**\n   * Handle dragger drag events.\n   *\n   * @param {PointerEvent} event The drag event.\n   * @private\n   */\n  handleDraggerDrag_(event) {\n    if (this.dragging_) {\n      const deltaX = event.clientX - this.startX_;\n      const deltaY = event.clientY - this.startY_;\n      const relativePosition = this.getRelativePosition_(deltaX, deltaY);\n      this.currentResolution_ =\n        this.getResolutionForPosition_(relativePosition);\n      this.getMap().getView().setResolution(this.currentResolution_);\n    }\n  }\n\n  /**\n   * Handle dragger end events.\n   * @param {PointerEvent} event The drag event.\n   * @private\n   */\n  handleDraggerEnd_(event) {\n    if (this.dragging_) {\n      const view = this.getMap().getView();\n      view.endInteraction();\n\n      this.dragging_ = false;\n      this.startX_ = undefined;\n      this.startY_ = undefined;\n      this.dragListenerKeys_.forEach(unlistenByKey);\n      this.dragListenerKeys_.length = 0;\n    }\n  }\n\n  /**\n   * Positions the thumb inside its container according to the given resolution.\n   *\n   * @param {number} res The res.\n   * @private\n   */\n  setThumbPosition_(res) {\n    const position = this.getPositionForResolution_(res);\n    const thumb = /** @type {HTMLElement} */ (this.element.firstElementChild);\n\n    if (this.direction_ == Direction.HORIZONTAL) {\n      thumb.style.left = this.widthLimit_ * position + 'px';\n    } else {\n      thumb.style.top = this.heightLimit_ * position + 'px';\n    }\n  }\n\n  /**\n   * Calculates the relative position of the thumb given x and y offsets.  The\n   * relative position scales from 0 to 1.  The x and y offsets are assumed to be\n   * in pixel units within the dragger limits.\n   *\n   * @param {number} x Pixel position relative to the left of the slider.\n   * @param {number} y Pixel position relative to the top of the slider.\n   * @return {number} The relative position of the thumb.\n   * @private\n   */\n  getRelativePosition_(x, y) {\n    let amount;\n    if (this.direction_ === Direction.HORIZONTAL) {\n      amount = x / this.widthLimit_;\n    } else {\n      amount = y / this.heightLimit_;\n    }\n    return clamp(amount, 0, 1);\n  }\n\n  /**\n   * Calculates the corresponding resolution of the thumb given its relative\n   * position (where 0 is the minimum and 1 is the maximum).\n   *\n   * @param {number} position The relative position of the thumb.\n   * @return {number} The corresponding resolution.\n   * @private\n   */\n  getResolutionForPosition_(position) {\n    const fn = this.getMap().getView().getResolutionForValueFunction();\n    return fn(1 - position);\n  }\n\n  /**\n   * Determines the relative position of the slider for the given resolution.  A\n   * relative position of 0 corresponds to the minimum view resolution.  A\n   * relative position of 1 corresponds to the maximum view resolution.\n   *\n   * @param {number} res The resolution.\n   * @return {number} The relative position value (between 0 and 1).\n   * @private\n   */\n  getPositionForResolution_(res) {\n    const fn = this.getMap().getView().getValueForResolutionFunction();\n    return clamp(1 - fn(res), 0, 1);\n  }\n\n  /**\n   * Update the zoomslider element.\n   * @param {import(\"../MapEvent.js\").default} mapEvent Map event.\n   * @override\n   */\n  render(mapEvent) {\n    if (!mapEvent.frameState) {\n      return;\n    }\n    if (!this.sliderInitialized_ && !this.initSlider_()) {\n      return;\n    }\n    const res = mapEvent.frameState.viewState.resolution;\n    this.currentResolution_ = res;\n    this.setThumbPosition_(res);\n  }\n}\n\nexport default ZoomSlider;\n","/**\n * @module ol/control/ZoomToExtent\n */\nimport Control from './Control.js';\nimport EventType from '../events/EventType.js';\nimport {CLASS_CONTROL, CLASS_UNSELECTABLE} from '../css.js';\nimport {fromExtent as polygonFromExtent} from '../geom/Polygon.js';\n\n/**\n * @typedef {Object} Options\n * @property {string} [className='ol-zoom-extent'] Class name.\n * @property {HTMLElement|string} [target] Specify a target if you want the control\n * to be rendered outside of the map's viewport.\n * @property {string|HTMLElement} [label='E'] Text label to use for the button.\n * Instead of text, also an element (e.g. a `span` element) can be used.\n * @property {string} [tipLabel='Fit to extent'] Text label to use for the button tip.\n * @property {import(\"../extent.js\").Extent} [extent] The extent to zoom to. If undefined the validity\n * extent of the view projection is used.\n */\n\n/**\n * @classdesc\n * A button control which, when pressed, changes the map view to a specific\n * extent. To style this control use the css selector `.ol-zoom-extent`.\n *\n * @api\n */\nclass ZoomToExtent extends Control {\n  /**\n   * @param {Options} [options] Options.\n   */\n  constructor(options) {\n    options = options ? options : {};\n\n    super({\n      element: document.createElement('div'),\n      target: options.target,\n    });\n\n    /**\n     * @type {?import(\"../extent.js\").Extent|null}\n     * @protected\n     */\n    this.extent = options.extent ? options.extent : null;\n\n    const className =\n      options.className !== undefined ? options.className : 'ol-zoom-extent';\n\n    const label = options.label !== undefined ? options.label : 'E';\n    const tipLabel =\n      options.tipLabel !== undefined ? options.tipLabel : 'Fit to extent';\n    const button = document.createElement('button');\n    button.setAttribute('type', 'button');\n    button.title = tipLabel;\n    button.appendChild(\n      typeof label === 'string' ? document.createTextNode(label) : label\n    );\n\n    button.addEventListener(\n      EventType.CLICK,\n      this.handleClick_.bind(this),\n      false\n    );\n\n    const cssClasses =\n      className + ' ' + CLASS_UNSELECTABLE + ' ' + CLASS_CONTROL;\n    const element = this.element;\n    element.className = cssClasses;\n    element.appendChild(button);\n  }\n\n  /**\n   * @param {MouseEvent} event The event to handle\n   * @private\n   */\n  handleClick_(event) {\n    event.preventDefault();\n    this.handleZoomToExtent();\n  }\n\n  /**\n   * @protected\n   */\n  handleZoomToExtent() {\n    const map = this.getMap();\n    const view = map.getView();\n    const extent = !this.extent\n      ? view.getProjection().getExtent()\n      : this.extent;\n    view.fitInternal(polygonFromExtent(extent));\n  }\n}\n\nexport default ZoomToExtent;\n","import $ol$AssertionError from './ol/AssertionError.js';\nimport {CollectionEvent as _ol_Collection$CollectionEvent} from './ol/Collection.js';\nimport $ol$Collection from './ol/Collection.js';\nimport {asImageLike as _ol_DataTile$asImageLike} from './ol/DataTile.js';\nimport {asArrayLike as _ol_DataTile$asArrayLike} from './ol/DataTile.js';\nimport {toArray as _ol_DataTile$toArray} from './ol/DataTile.js';\nimport $ol$DataTile from './ol/DataTile.js';\nimport $ol$Disposable from './ol/Disposable.js';\nimport $ol$Feature from './ol/Feature.js';\nimport {createStyleFunction as _ol_Feature$createStyleFunction} from './ol/Feature.js';\nimport {GeolocationError as _ol_Geolocation$GeolocationError} from './ol/Geolocation.js';\nimport $ol$Geolocation from './ol/Geolocation.js';\nimport $ol$Image from './ol/Image.js';\nimport {listenImage as _ol_Image$listenImage} from './ol/Image.js';\nimport $ol$ImageBase from './ol/ImageBase.js';\nimport $ol$ImageCanvas from './ol/ImageCanvas.js';\nimport $ol$ImageTile from './ol/ImageTile.js';\nimport $ol$Kinetic from './ol/Kinetic.js';\nimport $ol$Map from './ol/Map.js';\nimport $ol$MapBrowserEvent from './ol/MapBrowserEvent.js';\nimport $ol$MapBrowserEventHandler from './ol/MapBrowserEventHandler.js';\nimport $ol$MapEvent from './ol/MapEvent.js';\nimport {ObjectEvent as _ol_Object$ObjectEvent} from './ol/Object.js';\nimport $ol$Object from './ol/Object.js';\nimport $ol$Observable from './ol/Observable.js';\nimport {unByKey as _ol_Observable$unByKey} from './ol/Observable.js';\nimport $ol$Overlay from './ol/Overlay.js';\nimport $ol$Tile from './ol/Tile.js';\nimport $ol$TileCache from './ol/TileCache.js';\nimport $ol$TileQueue from './ol/TileQueue.js';\nimport {getTilePriority as _ol_TileQueue$getTilePriority} from './ol/TileQueue.js';\nimport $ol$TileRange from './ol/TileRange.js';\nimport {createOrUpdate as _ol_TileRange$createOrUpdate} from './ol/TileRange.js';\nimport $ol$VectorRenderTile from './ol/VectorRenderTile.js';\nimport $ol$VectorTile from './ol/VectorTile.js';\nimport $ol$View from './ol/View.js';\nimport {createCenterConstraint as _ol_View$createCenterConstraint} from './ol/View.js';\nimport {createResolutionConstraint as _ol_View$createResolutionConstraint} from './ol/View.js';\nimport {createRotationConstraint as _ol_View$createRotationConstraint} from './ol/View.js';\nimport {isNoopAnimation as _ol_View$isNoopAnimation} from './ol/View.js';\nimport {binarySearch as _ol_array$binarySearch} from './ol/array.js';\nimport {ascending as _ol_array$ascending} from './ol/array.js';\nimport {linearFindNearest as _ol_array$linearFindNearest} from './ol/array.js';\nimport {reverseSubArray as _ol_array$reverseSubArray} from './ol/array.js';\nimport {extend as _ol_array$extend} from './ol/array.js';\nimport {remove as _ol_array$remove} from './ol/array.js';\nimport {equals as _ol_array$equals} from './ol/array.js';\nimport {stableSort as _ol_array$stableSort} from './ol/array.js';\nimport {isSorted as _ol_array$isSorted} from './ol/array.js';\nimport {assert as _ol_asserts$assert} from './ol/asserts.js';\nimport {createExtent as _ol_centerconstraint$createExtent} from './ol/centerconstraint.js';\nimport {none as _ol_centerconstraint$none} from './ol/centerconstraint.js';\nimport {asString as _ol_color$asString} from './ol/color.js';\nimport {fromString as _ol_color$fromString} from './ol/color.js';\nimport {asArray as _ol_color$asArray} from './ol/color.js';\nimport {normalize as _ol_color$normalize} from './ol/color.js';\nimport {toString as _ol_color$toString} from './ol/color.js';\nimport {isStringColor as _ol_color$isStringColor} from './ol/color.js';\nimport {asColorLike as _ol_colorlike$asColorLike} from './ol/colorlike.js';\nimport {setLevel as _ol_console$setLevel} from './ol/console.js';\nimport {log as _ol_console$log} from './ol/console.js';\nimport {warn as _ol_console$warn} from './ol/console.js';\nimport {error as _ol_console$error} from './ol/console.js';\nimport {add as _ol_coordinate$add} from './ol/coordinate.js';\nimport {closestOnCircle as _ol_coordinate$closestOnCircle} from './ol/coordinate.js';\nimport {closestOnSegment as _ol_coordinate$closestOnSegment} from './ol/coordinate.js';\nimport {createStringXY as _ol_coordinate$createStringXY} from './ol/coordinate.js';\nimport {degreesToStringHDMS as _ol_coordinate$degreesToStringHDMS} from './ol/coordinate.js';\nimport {format as _ol_coordinate$format} from './ol/coordinate.js';\nimport {equals as _ol_coordinate$equals} from './ol/coordinate.js';\nimport {rotate as _ol_coordinate$rotate} from './ol/coordinate.js';\nimport {scale as _ol_coordinate$scale} from './ol/coordinate.js';\nimport {squaredDistance as _ol_coordinate$squaredDistance} from './ol/coordinate.js';\nimport {distance as _ol_coordinate$distance} from './ol/coordinate.js';\nimport {squaredDistanceToSegment as _ol_coordinate$squaredDistanceToSegment} from './ol/coordinate.js';\nimport {toStringHDMS as _ol_coordinate$toStringHDMS} from './ol/coordinate.js';\nimport {toStringXY as _ol_coordinate$toStringXY} from './ol/coordinate.js';\nimport {wrapX as _ol_coordinate$wrapX} from './ol/coordinate.js';\nimport {getWorldsAway as _ol_coordinate$getWorldsAway} from './ol/coordinate.js';\nimport {CLASS_HIDDEN as _ol_css$CLASS_HIDDEN} from './ol/css.js';\nimport {CLASS_SELECTABLE as _ol_css$CLASS_SELECTABLE} from './ol/css.js';\nimport {CLASS_UNSELECTABLE as _ol_css$CLASS_UNSELECTABLE} from './ol/css.js';\nimport {CLASS_UNSUPPORTED as _ol_css$CLASS_UNSUPPORTED} from './ol/css.js';\nimport {CLASS_CONTROL as _ol_css$CLASS_CONTROL} from './ol/css.js';\nimport {CLASS_COLLAPSED as _ol_css$CLASS_COLLAPSED} from './ol/css.js';\nimport {getFontParameters as _ol_css$getFontParameters} from './ol/css.js';\nimport {createCanvasContext2D as _ol_dom$createCanvasContext2D} from './ol/dom.js';\nimport {releaseCanvas as _ol_dom$releaseCanvas} from './ol/dom.js';\nimport {outerWidth as _ol_dom$outerWidth} from './ol/dom.js';\nimport {outerHeight as _ol_dom$outerHeight} from './ol/dom.js';\nimport {replaceNode as _ol_dom$replaceNode} from './ol/dom.js';\nimport {removeNode as _ol_dom$removeNode} from './ol/dom.js';\nimport {removeChildren as _ol_dom$removeChildren} from './ol/dom.js';\nimport {replaceChildren as _ol_dom$replaceChildren} from './ol/dom.js';\nimport {easeIn as _ol_easing$easeIn} from './ol/easing.js';\nimport {easeOut as _ol_easing$easeOut} from './ol/easing.js';\nimport {inAndOut as _ol_easing$inAndOut} from './ol/easing.js';\nimport {linear as _ol_easing$linear} from './ol/easing.js';\nimport {upAndDown as _ol_easing$upAndDown} from './ol/easing.js';\nimport {listen as _ol_events$listen} from './ol/events.js';\nimport {listenOnce as _ol_events$listenOnce} from './ol/events.js';\nimport {unlistenByKey as _ol_events$unlistenByKey} from './ol/events.js';\nimport {boundingExtent as _ol_extent$boundingExtent} from './ol/extent.js';\nimport {buffer as _ol_extent$buffer} from './ol/extent.js';\nimport {clone as _ol_extent$clone} from './ol/extent.js';\nimport {closestSquaredDistanceXY as _ol_extent$closestSquaredDistanceXY} from './ol/extent.js';\nimport {containsCoordinate as _ol_extent$containsCoordinate} from './ol/extent.js';\nimport {containsExtent as _ol_extent$containsExtent} from './ol/extent.js';\nimport {containsXY as _ol_extent$containsXY} from './ol/extent.js';\nimport {coordinateRelationship as _ol_extent$coordinateRelationship} from './ol/extent.js';\nimport {createEmpty as _ol_extent$createEmpty} from './ol/extent.js';\nimport {createOrUpdate as _ol_extent$createOrUpdate} from './ol/extent.js';\nimport {createOrUpdateEmpty as _ol_extent$createOrUpdateEmpty} from './ol/extent.js';\nimport {createOrUpdateFromCoordinate as _ol_extent$createOrUpdateFromCoordinate} from './ol/extent.js';\nimport {createOrUpdateFromCoordinates as _ol_extent$createOrUpdateFromCoordinates} from './ol/extent.js';\nimport {createOrUpdateFromFlatCoordinates as _ol_extent$createOrUpdateFromFlatCoordinates} from './ol/extent.js';\nimport {createOrUpdateFromRings as _ol_extent$createOrUpdateFromRings} from './ol/extent.js';\nimport {equals as _ol_extent$equals} from './ol/extent.js';\nimport {approximatelyEquals as _ol_extent$approximatelyEquals} from './ol/extent.js';\nimport {extend as _ol_extent$extend} from './ol/extent.js';\nimport {extendCoordinate as _ol_extent$extendCoordinate} from './ol/extent.js';\nimport {extendCoordinates as _ol_extent$extendCoordinates} from './ol/extent.js';\nimport {extendFlatCoordinates as _ol_extent$extendFlatCoordinates} from './ol/extent.js';\nimport {extendRings as _ol_extent$extendRings} from './ol/extent.js';\nimport {extendXY as _ol_extent$extendXY} from './ol/extent.js';\nimport {forEachCorner as _ol_extent$forEachCorner} from './ol/extent.js';\nimport {getArea as _ol_extent$getArea} from './ol/extent.js';\nimport {getBottomLeft as _ol_extent$getBottomLeft} from './ol/extent.js';\nimport {getBottomRight as _ol_extent$getBottomRight} from './ol/extent.js';\nimport {getCenter as _ol_extent$getCenter} from './ol/extent.js';\nimport {getCorner as _ol_extent$getCorner} from './ol/extent.js';\nimport {getEnlargedArea as _ol_extent$getEnlargedArea} from './ol/extent.js';\nimport {getForViewAndSize as _ol_extent$getForViewAndSize} from './ol/extent.js';\nimport {getRotatedViewport as _ol_extent$getRotatedViewport} from './ol/extent.js';\nimport {getHeight as _ol_extent$getHeight} from './ol/extent.js';\nimport {getIntersectionArea as _ol_extent$getIntersectionArea} from './ol/extent.js';\nimport {getIntersection as _ol_extent$getIntersection} from './ol/extent.js';\nimport {getMargin as _ol_extent$getMargin} from './ol/extent.js';\nimport {getSize as _ol_extent$getSize} from './ol/extent.js';\nimport {getTopLeft as _ol_extent$getTopLeft} from './ol/extent.js';\nimport {getTopRight as _ol_extent$getTopRight} from './ol/extent.js';\nimport {getWidth as _ol_extent$getWidth} from './ol/extent.js';\nimport {intersects as _ol_extent$intersects} from './ol/extent.js';\nimport {isEmpty as _ol_extent$isEmpty} from './ol/extent.js';\nimport {returnOrUpdate as _ol_extent$returnOrUpdate} from './ol/extent.js';\nimport {scaleFromCenter as _ol_extent$scaleFromCenter} from './ol/extent.js';\nimport {intersectsSegment as _ol_extent$intersectsSegment} from './ol/extent.js';\nimport {applyTransform as _ol_extent$applyTransform} from './ol/extent.js';\nimport {wrapX as _ol_extent$wrapX} from './ol/extent.js';\nimport {wrapAndSliceX as _ol_extent$wrapAndSliceX} from './ol/extent.js';\nimport {loadFeaturesXhr as _ol_featureloader$loadFeaturesXhr} from './ol/featureloader.js';\nimport {xhr as _ol_featureloader$xhr} from './ol/featureloader.js';\nimport {setWithCredentials as _ol_featureloader$setWithCredentials} from './ol/featureloader.js';\nimport {TRUE as _ol_functions$TRUE} from './ol/functions.js';\nimport {FALSE as _ol_functions$FALSE} from './ol/functions.js';\nimport {VOID as _ol_functions$VOID} from './ol/functions.js';\nimport {memoizeOne as _ol_functions$memoizeOne} from './ol/functions.js';\nimport {toPromise as _ol_functions$toPromise} from './ol/functions.js';\nimport {FIREFOX as _ol_has$FIREFOX} from './ol/has.js';\nimport {SAFARI as _ol_has$SAFARI} from './ol/has.js';\nimport {SAFARI_BUG_237906 as _ol_has$SAFARI_BUG_237906} from './ol/has.js';\nimport {WEBKIT as _ol_has$WEBKIT} from './ol/has.js';\nimport {MAC as _ol_has$MAC} from './ol/has.js';\nimport {DEVICE_PIXEL_RATIO as _ol_has$DEVICE_PIXEL_RATIO} from './ol/has.js';\nimport {WORKER_OFFSCREEN_CANVAS as _ol_has$WORKER_OFFSCREEN_CANVAS} from './ol/has.js';\nimport {IMAGE_DECODE as _ol_has$IMAGE_DECODE} from './ol/has.js';\nimport {PASSIVE_EVENT_LISTENERS as _ol_has$PASSIVE_EVENT_LISTENERS} from './ol/has.js';\nimport {all as _ol_loadingstrategy$all} from './ol/loadingstrategy.js';\nimport {bbox as _ol_loadingstrategy$bbox} from './ol/loadingstrategy.js';\nimport {tile as _ol_loadingstrategy$tile} from './ol/loadingstrategy.js';\nimport {clamp as _ol_math$clamp} from './ol/math.js';\nimport {squaredSegmentDistance as _ol_math$squaredSegmentDistance} from './ol/math.js';\nimport {squaredDistance as _ol_math$squaredDistance} from './ol/math.js';\nimport {solveLinearSystem as _ol_math$solveLinearSystem} from './ol/math.js';\nimport {toDegrees as _ol_math$toDegrees} from './ol/math.js';\nimport {toRadians as _ol_math$toRadians} from './ol/math.js';\nimport {modulo as _ol_math$modulo} from './ol/math.js';\nimport {lerp as _ol_math$lerp} from './ol/math.js';\nimport {toFixed as _ol_math$toFixed} from './ol/math.js';\nimport {round as _ol_math$round} from './ol/math.js';\nimport {floor as _ol_math$floor} from './ol/math.js';\nimport {ceil as _ol_math$ceil} from './ol/math.js';\nimport {jsonp as _ol_net$jsonp} from './ol/net.js';\nimport {ResponseError as _ol_net$ResponseError} from './ol/net.js';\nimport {ClientError as _ol_net$ClientError} from './ol/net.js';\nimport {getJSON as _ol_net$getJSON} from './ol/net.js';\nimport {resolveUrl as _ol_net$resolveUrl} from './ol/net.js';\nimport {overrideXHR as _ol_net$overrideXHR} from './ol/net.js';\nimport {restoreXHR as _ol_net$restoreXHR} from './ol/net.js';\nimport {clear as _ol_obj$clear} from './ol/obj.js';\nimport {isEmpty as _ol_obj$isEmpty} from './ol/obj.js';\nimport {disableCoordinateWarning as _ol_proj$disableCoordinateWarning} from './ol/proj.js';\nimport {cloneTransform as _ol_proj$cloneTransform} from './ol/proj.js';\nimport {identityTransform as _ol_proj$identityTransform} from './ol/proj.js';\nimport {addProjection as _ol_proj$addProjection} from './ol/proj.js';\nimport {addProjections as _ol_proj$addProjections} from './ol/proj.js';\nimport {get as _ol_proj$get} from './ol/proj.js';\nimport {getPointResolution as _ol_proj$getPointResolution} from './ol/proj.js';\nimport {addEquivalentProjections as _ol_proj$addEquivalentProjections} from './ol/proj.js';\nimport {addEquivalentTransforms as _ol_proj$addEquivalentTransforms} from './ol/proj.js';\nimport {clearAllProjections as _ol_proj$clearAllProjections} from './ol/proj.js';\nimport {createProjection as _ol_proj$createProjection} from './ol/proj.js';\nimport {createTransformFromCoordinateTransform as _ol_proj$createTransformFromCoordinateTransform} from './ol/proj.js';\nimport {addCoordinateTransforms as _ol_proj$addCoordinateTransforms} from './ol/proj.js';\nimport {fromLonLat as _ol_proj$fromLonLat} from './ol/proj.js';\nimport {toLonLat as _ol_proj$toLonLat} from './ol/proj.js';\nimport {equivalent as _ol_proj$equivalent} from './ol/proj.js';\nimport {getTransformFromProjections as _ol_proj$getTransformFromProjections} from './ol/proj.js';\nimport {getTransform as _ol_proj$getTransform} from './ol/proj.js';\nimport {transform as _ol_proj$transform} from './ol/proj.js';\nimport {transformExtent as _ol_proj$transformExtent} from './ol/proj.js';\nimport {transformWithProjections as _ol_proj$transformWithProjections} from './ol/proj.js';\nimport {setUserProjection as _ol_proj$setUserProjection} from './ol/proj.js';\nimport {clearUserProjection as _ol_proj$clearUserProjection} from './ol/proj.js';\nimport {getUserProjection as _ol_proj$getUserProjection} from './ol/proj.js';\nimport {useGeographic as _ol_proj$useGeographic} from './ol/proj.js';\nimport {toUserCoordinate as _ol_proj$toUserCoordinate} from './ol/proj.js';\nimport {fromUserCoordinate as _ol_proj$fromUserCoordinate} from './ol/proj.js';\nimport {toUserExtent as _ol_proj$toUserExtent} from './ol/proj.js';\nimport {fromUserExtent as _ol_proj$fromUserExtent} from './ol/proj.js';\nimport {toUserResolution as _ol_proj$toUserResolution} from './ol/proj.js';\nimport {fromUserResolution as _ol_proj$fromUserResolution} from './ol/proj.js';\nimport {createSafeCoordinateTransform as _ol_proj$createSafeCoordinateTransform} from './ol/proj.js';\nimport {addCommon as _ol_proj$addCommon} from './ol/proj.js';\nimport {toContext as _ol_render$toContext} from './ol/render.js';\nimport {getVectorContext as _ol_render$getVectorContext} from './ol/render.js';\nimport {getRenderPixel as _ol_render$getRenderPixel} from './ol/render.js';\nimport {canvasPool as _ol_reproj$canvasPool} from './ol/reproj.js';\nimport {calculateSourceResolution as _ol_reproj$calculateSourceResolution} from './ol/reproj.js';\nimport {calculateSourceExtentResolution as _ol_reproj$calculateSourceExtentResolution} from './ol/reproj.js';\nimport {render as _ol_reproj$render} from './ol/reproj.js';\nimport {createSnapToResolutions as _ol_resolutionconstraint$createSnapToResolutions} from './ol/resolutionconstraint.js';\nimport {createSnapToPower as _ol_resolutionconstraint$createSnapToPower} from './ol/resolutionconstraint.js';\nimport {createMinMaxResolution as _ol_resolutionconstraint$createMinMaxResolution} from './ol/resolutionconstraint.js';\nimport {disable as _ol_rotationconstraint$disable} from './ol/rotationconstraint.js';\nimport {none as _ol_rotationconstraint$none} from './ol/rotationconstraint.js';\nimport {createSnapToN as _ol_rotationconstraint$createSnapToN} from './ol/rotationconstraint.js';\nimport {createSnapToZero as _ol_rotationconstraint$createSnapToZero} from './ol/rotationconstraint.js';\nimport {buffer as _ol_size$buffer} from './ol/size.js';\nimport {hasArea as _ol_size$hasArea} from './ol/size.js';\nimport {scale as _ol_size$scale} from './ol/size.js';\nimport {toSize as _ol_size$toSize} from './ol/size.js';\nimport {sourcesFromTileGrid as _ol_source$sourcesFromTileGrid} from './ol/source.js';\nimport {DEFAULT_RADIUS as _ol_sphere$DEFAULT_RADIUS} from './ol/sphere.js';\nimport {getDistance as _ol_sphere$getDistance} from './ol/sphere.js';\nimport {getLength as _ol_sphere$getLength} from './ol/sphere.js';\nimport {getArea as _ol_sphere$getArea} from './ol/sphere.js';\nimport {offset as _ol_sphere$offset} from './ol/sphere.js';\nimport {padNumber as _ol_string$padNumber} from './ol/string.js';\nimport {compareVersions as _ol_string$compareVersions} from './ol/string.js';\nimport {createOrUpdate as _ol_tilecoord$createOrUpdate} from './ol/tilecoord.js';\nimport {getKeyZXY as _ol_tilecoord$getKeyZXY} from './ol/tilecoord.js';\nimport {getKey as _ol_tilecoord$getKey} from './ol/tilecoord.js';\nimport {getCacheKeyForTileKey as _ol_tilecoord$getCacheKeyForTileKey} from './ol/tilecoord.js';\nimport {fromKey as _ol_tilecoord$fromKey} from './ol/tilecoord.js';\nimport {hash as _ol_tilecoord$hash} from './ol/tilecoord.js';\nimport {withinExtentAndZ as _ol_tilecoord$withinExtentAndZ} from './ol/tilecoord.js';\nimport {getForProjection as _ol_tilegrid$getForProjection} from './ol/tilegrid.js';\nimport {wrapX as _ol_tilegrid$wrapX} from './ol/tilegrid.js';\nimport {createForExtent as _ol_tilegrid$createForExtent} from './ol/tilegrid.js';\nimport {createXYZ as _ol_tilegrid$createXYZ} from './ol/tilegrid.js';\nimport {createForProjection as _ol_tilegrid$createForProjection} from './ol/tilegrid.js';\nimport {extentFromProjection as _ol_tilegrid$extentFromProjection} from './ol/tilegrid.js';\nimport {createFromTemplate as _ol_tileurlfunction$createFromTemplate} from './ol/tileurlfunction.js';\nimport {createFromTemplates as _ol_tileurlfunction$createFromTemplates} from './ol/tileurlfunction.js';\nimport {createFromTileUrlFunctions as _ol_tileurlfunction$createFromTileUrlFunctions} from './ol/tileurlfunction.js';\nimport {nullTileUrlFunction as _ol_tileurlfunction$nullTileUrlFunction} from './ol/tileurlfunction.js';\nimport {expandUrl as _ol_tileurlfunction$expandUrl} from './ol/tileurlfunction.js';\nimport {create as _ol_transform$create} from './ol/transform.js';\nimport {reset as _ol_transform$reset} from './ol/transform.js';\nimport {multiply as _ol_transform$multiply} from './ol/transform.js';\nimport {set as _ol_transform$set} from './ol/transform.js';\nimport {setFromArray as _ol_transform$setFromArray} from './ol/transform.js';\nimport {apply as _ol_transform$apply} from './ol/transform.js';\nimport {rotate as _ol_transform$rotate} from './ol/transform.js';\nimport {scale as _ol_transform$scale} from './ol/transform.js';\nimport {makeScale as _ol_transform$makeScale} from './ol/transform.js';\nimport {translate as _ol_transform$translate} from './ol/transform.js';\nimport {compose as _ol_transform$compose} from './ol/transform.js';\nimport {composeCssTransform as _ol_transform$composeCssTransform} from './ol/transform.js';\nimport {invert as _ol_transform$invert} from './ol/transform.js';\nimport {makeInverse as _ol_transform$makeInverse} from './ol/transform.js';\nimport {determinant as _ol_transform$determinant} from './ol/transform.js';\nimport {toString as _ol_transform$toString} from './ol/transform.js';\nimport {appendParams as _ol_uri$appendParams} from './ol/uri.js';\nimport {abstract as _ol_util$abstract} from './ol/util.js';\nimport {getUid as _ol_util$getUid} from './ol/util.js';\nimport {VERSION as _ol_util$VERSION} from './ol/util.js';\nimport {ARRAY_BUFFER as _ol_webgl$ARRAY_BUFFER} from './ol/webgl.js';\nimport {ELEMENT_ARRAY_BUFFER as _ol_webgl$ELEMENT_ARRAY_BUFFER} from './ol/webgl.js';\nimport {STREAM_DRAW as _ol_webgl$STREAM_DRAW} from './ol/webgl.js';\nimport {STATIC_DRAW as _ol_webgl$STATIC_DRAW} from './ol/webgl.js';\nimport {DYNAMIC_DRAW as _ol_webgl$DYNAMIC_DRAW} from './ol/webgl.js';\nimport {UNSIGNED_BYTE as _ol_webgl$UNSIGNED_BYTE} from './ol/webgl.js';\nimport {UNSIGNED_SHORT as _ol_webgl$UNSIGNED_SHORT} from './ol/webgl.js';\nimport {UNSIGNED_INT as _ol_webgl$UNSIGNED_INT} from './ol/webgl.js';\nimport {FLOAT as _ol_webgl$FLOAT} from './ol/webgl.js';\nimport {getContext as _ol_webgl$getContext} from './ol/webgl.js';\nimport {getSupportedExtensions as _ol_webgl$getSupportedExtensions} from './ol/webgl.js';\nimport {XML_SCHEMA_INSTANCE_URI as _ol_xml$XML_SCHEMA_INSTANCE_URI} from './ol/xml.js';\nimport {createElementNS as _ol_xml$createElementNS} from './ol/xml.js';\nimport {getAllTextContent as _ol_xml$getAllTextContent} from './ol/xml.js';\nimport {getAllTextContent_ as _ol_xml$getAllTextContent_} from './ol/xml.js';\nimport {isDocument as _ol_xml$isDocument} from './ol/xml.js';\nimport {getAttributeNS as _ol_xml$getAttributeNS} from './ol/xml.js';\nimport {parse as _ol_xml$parse} from './ol/xml.js';\nimport {makeArrayExtender as _ol_xml$makeArrayExtender} from './ol/xml.js';\nimport {makeArrayPusher as _ol_xml$makeArrayPusher} from './ol/xml.js';\nimport {makeReplacer as _ol_xml$makeReplacer} from './ol/xml.js';\nimport {makeObjectPropertyPusher as _ol_xml$makeObjectPropertyPusher} from './ol/xml.js';\nimport {makeObjectPropertySetter as _ol_xml$makeObjectPropertySetter} from './ol/xml.js';\nimport {makeChildAppender as _ol_xml$makeChildAppender} from './ol/xml.js';\nimport {makeArraySerializer as _ol_xml$makeArraySerializer} from './ol/xml.js';\nimport {makeSimpleNodeFactory as _ol_xml$makeSimpleNodeFactory} from './ol/xml.js';\nimport {OBJECT_PROPERTY_NODE_FACTORY as _ol_xml$OBJECT_PROPERTY_NODE_FACTORY} from './ol/xml.js';\nimport {makeSequence as _ol_xml$makeSequence} from './ol/xml.js';\nimport {makeStructureNS as _ol_xml$makeStructureNS} from './ol/xml.js';\nimport {parseNode as _ol_xml$parseNode} from './ol/xml.js';\nimport {pushParseAndPop as _ol_xml$pushParseAndPop} from './ol/xml.js';\nimport {serialize as _ol_xml$serialize} from './ol/xml.js';\nimport {pushSerializeAndPop as _ol_xml$pushSerializeAndPop} from './ol/xml.js';\nimport {registerXMLSerializer as _ol_xml$registerXMLSerializer} from './ol/xml.js';\nimport {getXMLSerializer as _ol_xml$getXMLSerializer} from './ol/xml.js';\nimport {registerDocument as _ol_xml$registerDocument} from './ol/xml.js';\nimport {getDocument as _ol_xml$getDocument} from './ol/xml.js';\nimport $ol$webgl$BaseTileRepresentation from './ol/webgl/BaseTileRepresentation.js';\nimport $ol$webgl$Buffer from './ol/webgl/Buffer.js';\nimport {getArrayClassForType as _ol_webgl_Buffer$getArrayClassForType} from './ol/webgl/Buffer.js';\nimport $ol$webgl$Helper from './ol/webgl/Helper.js';\nimport {computeAttributesStride as _ol_webgl_Helper$computeAttributesStride} from './ol/webgl/Helper.js';\nimport $ol$webgl$PaletteTexture from './ol/webgl/PaletteTexture.js';\nimport $ol$webgl$PostProcessingPass from './ol/webgl/PostProcessingPass.js';\nimport $ol$webgl$RenderTarget from './ol/webgl/RenderTarget.js';\nimport {ShaderBuilder as _ol_webgl_ShaderBuilder$ShaderBuilder} from './ol/webgl/ShaderBuilder.js';\nimport $ol$webgl$TileGeometry from './ol/webgl/TileGeometry.js';\nimport $ol$webgl$TileTexture from './ol/webgl/TileTexture.js';\nimport {getSymbolOpacityGlslFunction as _ol_webgl_styleparser$getSymbolOpacityGlslFunction} from './ol/webgl/styleparser.js';\nimport {packColor as _ol_webgl_styleparser$packColor} from './ol/webgl/styleparser.js';\nimport {parseLiteralStyle as _ol_webgl_styleparser$parseLiteralStyle} from './ol/webgl/styleparser.js';\nimport {create as _ol_vec_mat4$create} from './ol/vec/mat4.js';\nimport {fromTransform as _ol_vec_mat4$fromTransform} from './ol/vec/mat4.js';\nimport $ol$tilegrid$TileGrid from './ol/tilegrid/TileGrid.js';\nimport $ol$tilegrid$WMTS from './ol/tilegrid/WMTS.js';\nimport {createFromCapabilitiesMatrixSet as _ol_tilegrid_WMTS$createFromCapabilitiesMatrixSet} from './ol/tilegrid/WMTS.js';\nimport {DEFAULT_MAX_ZOOM as _ol_tilegrid_common$DEFAULT_MAX_ZOOM} from './ol/tilegrid/common.js';\nimport {DEFAULT_TILE_SIZE as _ol_tilegrid_common$DEFAULT_TILE_SIZE} from './ol/tilegrid/common.js';\nimport $ol$style$Circle from './ol/style/Circle.js';\nimport $ol$style$Fill from './ol/style/Fill.js';\nimport $ol$style$Icon from './ol/style/Icon.js';\nimport $ol$style$IconImage from './ol/style/IconImage.js';\nimport {get as _ol_style_IconImage$get} from './ol/style/IconImage.js';\nimport $ol$style$IconImageCache from './ol/style/IconImageCache.js';\nimport {shared as _ol_style_IconImageCache$shared} from './ol/style/IconImageCache.js';\nimport $ol$style$Image from './ol/style/Image.js';\nimport $ol$style$RegularShape from './ol/style/RegularShape.js';\nimport $ol$style$Stroke from './ol/style/Stroke.js';\nimport $ol$style$Style from './ol/style/Style.js';\nimport {toFunction as _ol_style_Style$toFunction} from './ol/style/Style.js';\nimport {createDefaultStyle as _ol_style_Style$createDefaultStyle} from './ol/style/Style.js';\nimport {createEditingStyle as _ol_style_Style$createEditingStyle} from './ol/style/Style.js';\nimport $ol$style$Text from './ol/style/Text.js';\nimport {Operators as _ol_style_expressions$Operators} from './ol/style/expressions.js';\nimport {getValueType as _ol_style_expressions$getValueType} from './ol/style/expressions.js';\nimport {isTypeUnique as _ol_style_expressions$isTypeUnique} from './ol/style/expressions.js';\nimport {numberToGlsl as _ol_style_expressions$numberToGlsl} from './ol/style/expressions.js';\nimport {arrayToGlsl as _ol_style_expressions$arrayToGlsl} from './ol/style/expressions.js';\nimport {colorToGlsl as _ol_style_expressions$colorToGlsl} from './ol/style/expressions.js';\nimport {getStringNumberEquivalent as _ol_style_expressions$getStringNumberEquivalent} from './ol/style/expressions.js';\nimport {stringToGlsl as _ol_style_expressions$stringToGlsl} from './ol/style/expressions.js';\nimport {expressionToGlsl as _ol_style_expressions$expressionToGlsl} from './ol/style/expressions.js';\nimport {uniformNameForVariable as _ol_style_expressions$uniformNameForVariable} from './ol/style/expressions.js';\nimport {PALETTE_TEXTURE_ARRAY as _ol_style_expressions$PALETTE_TEXTURE_ARRAY} from './ol/style/expressions.js';\nimport {toStyle as _ol_style_flat$toStyle} from './ol/style/flat.js';\nimport {createDefaultStyle as _ol_style_flat$createDefaultStyle} from './ol/style/flat.js';\nimport $ol$structs$LRUCache from './ol/structs/LRUCache.js';\nimport $ol$structs$LinkedList from './ol/structs/LinkedList.js';\nimport {DROP as _ol_structs_PriorityQueue$DROP} from './ol/structs/PriorityQueue.js';\nimport $ol$structs$PriorityQueue from './ol/structs/PriorityQueue.js';\nimport $ol$structs$RBush from './ol/structs/RBush.js';\nimport {quadKey as _ol_source_BingMaps$quadKey} from './ol/source/BingMaps.js';\nimport $ol$source$BingMaps from './ol/source/BingMaps.js';\nimport $ol$source$CartoDB from './ol/source/CartoDB.js';\nimport $ol$source$Cluster from './ol/source/Cluster.js';\nimport $ol$source$DataTile from './ol/source/DataTile.js';\nimport $ol$source$GeoTIFF from './ol/source/GeoTIFF.js';\nimport $ol$source$IIIF from './ol/source/IIIF.js';\nimport {ImageSourceEvent as _ol_source_Image$ImageSourceEvent} from './ol/source/Image.js';\nimport $ol$source$Image from './ol/source/Image.js';\nimport {defaultImageLoadFunction as _ol_source_Image$defaultImageLoadFunction} from './ol/source/Image.js';\nimport $ol$source$ImageArcGISRest from './ol/source/ImageArcGISRest.js';\nimport $ol$source$ImageCanvas from './ol/source/ImageCanvas.js';\nimport $ol$source$ImageMapGuide from './ol/source/ImageMapGuide.js';\nimport $ol$source$ImageStatic from './ol/source/ImageStatic.js';\nimport $ol$source$ImageWMS from './ol/source/ImageWMS.js';\nimport $ol$source$OGCMapTile from './ol/source/OGCMapTile.js';\nimport $ol$source$OGCVectorTile from './ol/source/OGCVectorTile.js';\nimport {ATTRIBUTION as _ol_source_OSM$ATTRIBUTION} from './ol/source/OSM.js';\nimport $ol$source$OSM from './ol/source/OSM.js';\nimport {newImageData as _ol_source_Raster$newImageData} from './ol/source/Raster.js';\nimport {Processor as _ol_source_Raster$Processor} from './ol/source/Raster.js';\nimport {RasterSourceEvent as _ol_source_Raster$RasterSourceEvent} from './ol/source/Raster.js';\nimport $ol$source$Raster from './ol/source/Raster.js';\nimport $ol$source$Source from './ol/source/Source.js';\nimport $ol$source$Stamen from './ol/source/Stamen.js';\nimport $ol$source$Tile from './ol/source/Tile.js';\nimport {TileSourceEvent as _ol_source_Tile$TileSourceEvent} from './ol/source/Tile.js';\nimport $ol$source$TileArcGISRest from './ol/source/TileArcGISRest.js';\nimport $ol$source$TileDebug from './ol/source/TileDebug.js';\nimport $ol$source$TileImage from './ol/source/TileImage.js';\nimport $ol$source$TileJSON from './ol/source/TileJSON.js';\nimport $ol$source$TileWMS from './ol/source/TileWMS.js';\nimport {CustomTile as _ol_source_UTFGrid$CustomTile} from './ol/source/UTFGrid.js';\nimport $ol$source$UTFGrid from './ol/source/UTFGrid.js';\nimport $ol$source$UrlTile from './ol/source/UrlTile.js';\nimport {VectorSourceEvent as _ol_source_Vector$VectorSourceEvent} from './ol/source/Vector.js';\nimport $ol$source$Vector from './ol/source/Vector.js';\nimport $ol$source$VectorTile from './ol/source/VectorTile.js';\nimport {defaultLoadFunction as _ol_source_VectorTile$defaultLoadFunction} from './ol/source/VectorTile.js';\nimport $ol$source$WMTS from './ol/source/WMTS.js';\nimport {optionsFromCapabilities as _ol_source_WMTS$optionsFromCapabilities} from './ol/source/WMTS.js';\nimport $ol$source$XYZ from './ol/source/XYZ.js';\nimport {CustomTile as _ol_source_Zoomify$CustomTile} from './ol/source/Zoomify.js';\nimport $ol$source$Zoomify from './ol/source/Zoomify.js';\nimport {DEFAULT_WMS_VERSION as _ol_source_common$DEFAULT_WMS_VERSION} from './ol/source/common.js';\nimport {getMapTileUrlTemplate as _ol_source_ogcTileUtil$getMapTileUrlTemplate} from './ol/source/ogcTileUtil.js';\nimport {getVectorTileUrlTemplate as _ol_source_ogcTileUtil$getVectorTileUrlTemplate} from './ol/source/ogcTileUtil.js';\nimport {getTileSetInfo as _ol_source_ogcTileUtil$getTileSetInfo} from './ol/source/ogcTileUtil.js';\nimport {DEFAULT_VERSION as _ol_source_wms$DEFAULT_VERSION} from './ol/source/wms.js';\nimport $ol$reproj$DataTile from './ol/reproj/DataTile.js';\nimport $ol$reproj$Image from './ol/reproj/Image.js';\nimport $ol$reproj$Tile from './ol/reproj/Tile.js';\nimport $ol$reproj$Triangulation from './ol/reproj/Triangulation.js';\nimport {ERROR_THRESHOLD as _ol_reproj_common$ERROR_THRESHOLD} from './ol/reproj/common.js';\nimport $ol$renderer$Composite from './ol/renderer/Composite.js';\nimport $ol$renderer$Layer from './ol/renderer/Layer.js';\nimport $ol$renderer$Map from './ol/renderer/Map.js';\nimport {defaultOrder as _ol_renderer_vector$defaultOrder} from './ol/renderer/vector.js';\nimport {getSquaredTolerance as _ol_renderer_vector$getSquaredTolerance} from './ol/renderer/vector.js';\nimport {getTolerance as _ol_renderer_vector$getTolerance} from './ol/renderer/vector.js';\nimport {renderFeature as _ol_renderer_vector$renderFeature} from './ol/renderer/vector.js';\nimport $ol$renderer$webgl$Layer from './ol/renderer/webgl/Layer.js';\nimport $ol$renderer$webgl$PointsLayer from './ol/renderer/webgl/PointsLayer.js';\nimport {Uniforms as _ol_renderer_webgl_TileLayer$Uniforms} from './ol/renderer/webgl/TileLayer.js';\nimport {Attributes as _ol_renderer_webgl_TileLayer$Attributes} from './ol/renderer/webgl/TileLayer.js';\nimport $ol$renderer$webgl$TileLayer from './ol/renderer/webgl/TileLayer.js';\nimport {Uniforms as _ol_renderer_webgl_TileLayerBase$Uniforms} from './ol/renderer/webgl/TileLayerBase.js';\nimport {newTileRepresentationLookup as _ol_renderer_webgl_TileLayerBase$newTileRepresentationLookup} from './ol/renderer/webgl/TileLayerBase.js';\nimport {getCacheKey as _ol_renderer_webgl_TileLayerBase$getCacheKey} from './ol/renderer/webgl/TileLayerBase.js';\nimport $ol$renderer$webgl$TileLayerBase from './ol/renderer/webgl/TileLayerBase.js';\nimport {Uniforms as _ol_renderer_webgl_VectorLayer$Uniforms} from './ol/renderer/webgl/VectorLayer.js';\nimport $ol$renderer$webgl$VectorLayer from './ol/renderer/webgl/VectorLayer.js';\nimport $ol$renderer$webgl$VectorTileLayer from './ol/renderer/webgl/VectorTileLayer.js';\nimport $ol$renderer$canvas$ImageLayer from './ol/renderer/canvas/ImageLayer.js';\nimport {canvasPool as _ol_renderer_canvas_Layer$canvasPool} from './ol/renderer/canvas/Layer.js';\nimport $ol$renderer$canvas$Layer from './ol/renderer/canvas/Layer.js';\nimport $ol$renderer$canvas$TileLayer from './ol/renderer/canvas/TileLayer.js';\nimport $ol$renderer$canvas$VectorImageLayer from './ol/renderer/canvas/VectorImageLayer.js';\nimport $ol$renderer$canvas$VectorLayer from './ol/renderer/canvas/VectorLayer.js';\nimport $ol$renderer$canvas$VectorTileLayer from './ol/renderer/canvas/VectorTileLayer.js';\nimport $ol$render$Box from './ol/render/Box.js';\nimport $ol$render$Event from './ol/render/Event.js';\nimport $ol$render$Feature from './ol/render/Feature.js';\nimport {toGeometry as _ol_render_Feature$toGeometry} from './ol/render/Feature.js';\nimport {toFeature as _ol_render_Feature$toFeature} from './ol/render/Feature.js';\nimport $ol$render$VectorContext from './ol/render/VectorContext.js';\nimport {defaultFont as _ol_render_canvas$defaultFont} from './ol/render/canvas.js';\nimport {defaultFillStyle as _ol_render_canvas$defaultFillStyle} from './ol/render/canvas.js';\nimport {defaultLineCap as _ol_render_canvas$defaultLineCap} from './ol/render/canvas.js';\nimport {defaultLineDash as _ol_render_canvas$defaultLineDash} from './ol/render/canvas.js';\nimport {defaultLineDashOffset as _ol_render_canvas$defaultLineDashOffset} from './ol/render/canvas.js';\nimport {defaultLineJoin as _ol_render_canvas$defaultLineJoin} from './ol/render/canvas.js';\nimport {defaultMiterLimit as _ol_render_canvas$defaultMiterLimit} from './ol/render/canvas.js';\nimport {defaultStrokeStyle as _ol_render_canvas$defaultStrokeStyle} from './ol/render/canvas.js';\nimport {defaultTextAlign as _ol_render_canvas$defaultTextAlign} from './ol/render/canvas.js';\nimport {defaultTextBaseline as _ol_render_canvas$defaultTextBaseline} from './ol/render/canvas.js';\nimport {defaultPadding as _ol_render_canvas$defaultPadding} from './ol/render/canvas.js';\nimport {defaultLineWidth as _ol_render_canvas$defaultLineWidth} from './ol/render/canvas.js';\nimport {checkedFonts as _ol_render_canvas$checkedFonts} from './ol/render/canvas.js';\nimport {textHeights as _ol_render_canvas$textHeights} from './ol/render/canvas.js';\nimport {registerFont as _ol_render_canvas$registerFont} from './ol/render/canvas.js';\nimport {measureTextHeight as _ol_render_canvas$measureTextHeight} from './ol/render/canvas.js';\nimport {measureTextWidth as _ol_render_canvas$measureTextWidth} from './ol/render/canvas.js';\nimport {measureAndCacheTextWidth as _ol_render_canvas$measureAndCacheTextWidth} from './ol/render/canvas.js';\nimport {getTextDimensions as _ol_render_canvas$getTextDimensions} from './ol/render/canvas.js';\nimport {rotateAtOffset as _ol_render_canvas$rotateAtOffset} from './ol/render/canvas.js';\nimport {drawImageOrLabel as _ol_render_canvas$drawImageOrLabel} from './ol/render/canvas.js';\nimport $ol$render$webgl$MixedGeometryBatch from './ol/render/webgl/MixedGeometryBatch.js';\nimport $ol$render$webgl$VectorStyleRenderer from './ol/render/webgl/VectorStyleRenderer.js';\nimport {getCustomAttributesSize as _ol_render_webgl_renderinstructions$getCustomAttributesSize} from './ol/render/webgl/renderinstructions.js';\nimport {generatePointRenderInstructions as _ol_render_webgl_renderinstructions$generatePointRenderInstructions} from './ol/render/webgl/renderinstructions.js';\nimport {generateLineStringRenderInstructions as _ol_render_webgl_renderinstructions$generateLineStringRenderInstructions} from './ol/render/webgl/renderinstructions.js';\nimport {generatePolygonRenderInstructions as _ol_render_webgl_renderinstructions$generatePolygonRenderInstructions} from './ol/render/webgl/renderinstructions.js';\nimport {writePointFeatureToBuffers as _ol_render_webgl_utils$writePointFeatureToBuffers} from './ol/render/webgl/utils.js';\nimport {writeLineSegmentToBuffers as _ol_render_webgl_utils$writeLineSegmentToBuffers} from './ol/render/webgl/utils.js';\nimport {writePolygonTrianglesToBuffers as _ol_render_webgl_utils$writePolygonTrianglesToBuffers} from './ol/render/webgl/utils.js';\nimport {getBlankImageData as _ol_render_webgl_utils$getBlankImageData} from './ol/render/webgl/utils.js';\nimport {colorEncodeId as _ol_render_webgl_utils$colorEncodeId} from './ol/render/webgl/utils.js';\nimport {colorDecodeId as _ol_render_webgl_utils$colorDecodeId} from './ol/render/webgl/utils.js';\nimport $ol$render$canvas$Builder from './ol/render/canvas/Builder.js';\nimport $ol$render$canvas$BuilderGroup from './ol/render/canvas/BuilderGroup.js';\nimport $ol$render$canvas$Executor from './ol/render/canvas/Executor.js';\nimport $ol$render$canvas$ExecutorGroup from './ol/render/canvas/ExecutorGroup.js';\nimport {getPixelIndexArray as _ol_render_canvas_ExecutorGroup$getPixelIndexArray} from './ol/render/canvas/ExecutorGroup.js';\nimport $ol$render$canvas$ImageBuilder from './ol/render/canvas/ImageBuilder.js';\nimport $ol$render$canvas$Immediate from './ol/render/canvas/Immediate.js';\nimport {fillInstruction as _ol_render_canvas_Instruction$fillInstruction} from './ol/render/canvas/Instruction.js';\nimport {strokeInstruction as _ol_render_canvas_Instruction$strokeInstruction} from './ol/render/canvas/Instruction.js';\nimport {beginPathInstruction as _ol_render_canvas_Instruction$beginPathInstruction} from './ol/render/canvas/Instruction.js';\nimport {closePathInstruction as _ol_render_canvas_Instruction$closePathInstruction} from './ol/render/canvas/Instruction.js';\nimport $ol$render$canvas$LineStringBuilder from './ol/render/canvas/LineStringBuilder.js';\nimport $ol$render$canvas$PolygonBuilder from './ol/render/canvas/PolygonBuilder.js';\nimport $ol$render$canvas$TextBuilder from './ol/render/canvas/TextBuilder.js';\nimport {HIT_DETECT_RESOLUTION as _ol_render_canvas_hitdetect$HIT_DETECT_RESOLUTION} from './ol/render/canvas/hitdetect.js';\nimport {createHitDetectionImageData as _ol_render_canvas_hitdetect$createHitDetectionImageData} from './ol/render/canvas/hitdetect.js';\nimport {hitDetect as _ol_render_canvas_hitdetect$hitDetect} from './ol/render/canvas/hitdetect.js';\nimport $ol$proj$Projection from './ol/proj/Projection.js';\nimport {fromCode as _ol_proj_Units$fromCode} from './ol/proj/Units.js';\nimport {METERS_PER_UNIT as _ol_proj_Units$METERS_PER_UNIT} from './ol/proj/Units.js';\nimport {RADIUS as _ol_proj_epsg3857$RADIUS} from './ol/proj/epsg3857.js';\nimport {HALF_SIZE as _ol_proj_epsg3857$HALF_SIZE} from './ol/proj/epsg3857.js';\nimport {EXTENT as _ol_proj_epsg3857$EXTENT} from './ol/proj/epsg3857.js';\nimport {WORLD_EXTENT as _ol_proj_epsg3857$WORLD_EXTENT} from './ol/proj/epsg3857.js';\nimport {MAX_SAFE_Y as _ol_proj_epsg3857$MAX_SAFE_Y} from './ol/proj/epsg3857.js';\nimport {PROJECTIONS as _ol_proj_epsg3857$PROJECTIONS} from './ol/proj/epsg3857.js';\nimport {fromEPSG4326 as _ol_proj_epsg3857$fromEPSG4326} from './ol/proj/epsg3857.js';\nimport {toEPSG4326 as _ol_proj_epsg3857$toEPSG4326} from './ol/proj/epsg3857.js';\nimport {RADIUS as _ol_proj_epsg4326$RADIUS} from './ol/proj/epsg4326.js';\nimport {EXTENT as _ol_proj_epsg4326$EXTENT} from './ol/proj/epsg4326.js';\nimport {METERS_PER_UNIT as _ol_proj_epsg4326$METERS_PER_UNIT} from './ol/proj/epsg4326.js';\nimport {PROJECTIONS as _ol_proj_epsg4326$PROJECTIONS} from './ol/proj/epsg4326.js';\nimport {isRegistered as _ol_proj_proj4$isRegistered} from './ol/proj/proj4.js';\nimport {unregister as _ol_proj_proj4$unregister} from './ol/proj/proj4.js';\nimport {register as _ol_proj_proj4$register} from './ol/proj/proj4.js';\nimport {setEPSGLookup as _ol_proj_proj4$setEPSGLookup} from './ol/proj/proj4.js';\nimport {getEPSGLookup as _ol_proj_proj4$getEPSGLookup} from './ol/proj/proj4.js';\nimport {fromEPSGCode as _ol_proj_proj4$fromEPSGCode} from './ol/proj/proj4.js';\nimport {epsgLookupMapTiler as _ol_proj_proj4$epsgLookupMapTiler} from './ol/proj/proj4.js';\nimport {clear as _ol_proj_projections$clear} from './ol/proj/projections.js';\nimport {get as _ol_proj_projections$get} from './ol/proj/projections.js';\nimport {add as _ol_proj_projections$add} from './ol/proj/projections.js';\nimport {clear as _ol_proj_transforms$clear} from './ol/proj/transforms.js';\nimport {add as _ol_proj_transforms$add} from './ol/proj/transforms.js';\nimport {remove as _ol_proj_transforms$remove} from './ol/proj/transforms.js';\nimport {get as _ol_proj_transforms$get} from './ol/proj/transforms.js';\nimport $ol$layer$Base from './ol/layer/Base.js';\nimport $ol$layer$BaseImage from './ol/layer/BaseImage.js';\nimport $ol$layer$BaseTile from './ol/layer/BaseTile.js';\nimport $ol$layer$BaseVector from './ol/layer/BaseVector.js';\nimport $ol$layer$Graticule from './ol/layer/Graticule.js';\nimport {GroupEvent as _ol_layer_Group$GroupEvent} from './ol/layer/Group.js';\nimport $ol$layer$Group from './ol/layer/Group.js';\nimport $ol$layer$Heatmap from './ol/layer/Heatmap.js';\nimport $ol$layer$Image from './ol/layer/Image.js';\nimport $ol$layer$Layer from './ol/layer/Layer.js';\nimport {inView as _ol_layer_Layer$inView} from './ol/layer/Layer.js';\nimport $ol$layer$MapboxVector from './ol/layer/MapboxVector.js';\nimport $ol$layer$Tile from './ol/layer/Tile.js';\nimport $ol$layer$Vector from './ol/layer/Vector.js';\nimport $ol$layer$VectorImage from './ol/layer/VectorImage.js';\nimport $ol$layer$VectorTile from './ol/layer/VectorTile.js';\nimport $ol$layer$WebGLPoints from './ol/layer/WebGLPoints.js';\nimport $ol$layer$WebGLTile from './ol/layer/WebGLTile.js';\nimport $ol$interaction$DblClickDragZoom from './ol/interaction/DblClickDragZoom.js';\nimport $ol$interaction$DoubleClickZoom from './ol/interaction/DoubleClickZoom.js';\nimport {DragAndDropEvent as _ol_interaction_DragAndDrop$DragAndDropEvent} from './ol/interaction/DragAndDrop.js';\nimport $ol$interaction$DragAndDrop from './ol/interaction/DragAndDrop.js';\nimport {DragBoxEvent as _ol_interaction_DragBox$DragBoxEvent} from './ol/interaction/DragBox.js';\nimport $ol$interaction$DragBox from './ol/interaction/DragBox.js';\nimport $ol$interaction$DragPan from './ol/interaction/DragPan.js';\nimport $ol$interaction$DragRotate from './ol/interaction/DragRotate.js';\nimport $ol$interaction$DragRotateAndZoom from './ol/interaction/DragRotateAndZoom.js';\nimport $ol$interaction$DragZoom from './ol/interaction/DragZoom.js';\nimport {DrawEvent as _ol_interaction_Draw$DrawEvent} from './ol/interaction/Draw.js';\nimport $ol$interaction$Draw from './ol/interaction/Draw.js';\nimport {createRegularPolygon as _ol_interaction_Draw$createRegularPolygon} from './ol/interaction/Draw.js';\nimport {createBox as _ol_interaction_Draw$createBox} from './ol/interaction/Draw.js';\nimport {ExtentEvent as _ol_interaction_Extent$ExtentEvent} from './ol/interaction/Extent.js';\nimport $ol$interaction$Extent from './ol/interaction/Extent.js';\nimport $ol$interaction$Interaction from './ol/interaction/Interaction.js';\nimport {pan as _ol_interaction_Interaction$pan} from './ol/interaction/Interaction.js';\nimport {zoomByDelta as _ol_interaction_Interaction$zoomByDelta} from './ol/interaction/Interaction.js';\nimport $ol$interaction$KeyboardPan from './ol/interaction/KeyboardPan.js';\nimport $ol$interaction$KeyboardZoom from './ol/interaction/KeyboardZoom.js';\nimport $ol$interaction$Link from './ol/interaction/Link.js';\nimport {ModifyEvent as _ol_interaction_Modify$ModifyEvent} from './ol/interaction/Modify.js';\nimport $ol$interaction$Modify from './ol/interaction/Modify.js';\nimport $ol$interaction$MouseWheelZoom from './ol/interaction/MouseWheelZoom.js';\nimport $ol$interaction$PinchRotate from './ol/interaction/PinchRotate.js';\nimport $ol$interaction$PinchZoom from './ol/interaction/PinchZoom.js';\nimport $ol$interaction$Pointer from './ol/interaction/Pointer.js';\nimport {centroid as _ol_interaction_Pointer$centroid} from './ol/interaction/Pointer.js';\nimport {SelectEvent as _ol_interaction_Select$SelectEvent} from './ol/interaction/Select.js';\nimport $ol$interaction$Select from './ol/interaction/Select.js';\nimport $ol$interaction$Snap from './ol/interaction/Snap.js';\nimport {TranslateEvent as _ol_interaction_Translate$TranslateEvent} from './ol/interaction/Translate.js';\nimport $ol$interaction$Translate from './ol/interaction/Translate.js';\nimport {defaults as _ol_interaction_defaults$defaults} from './ol/interaction/defaults.js';\nimport $ol$geom$Circle from './ol/geom/Circle.js';\nimport $ol$geom$Geometry from './ol/geom/Geometry.js';\nimport $ol$geom$GeometryCollection from './ol/geom/GeometryCollection.js';\nimport $ol$geom$LineString from './ol/geom/LineString.js';\nimport $ol$geom$LinearRing from './ol/geom/LinearRing.js';\nimport $ol$geom$MultiLineString from './ol/geom/MultiLineString.js';\nimport $ol$geom$MultiPoint from './ol/geom/MultiPoint.js';\nimport $ol$geom$MultiPolygon from './ol/geom/MultiPolygon.js';\nimport $ol$geom$Point from './ol/geom/Point.js';\nimport $ol$geom$Polygon from './ol/geom/Polygon.js';\nimport {circular as _ol_geom_Polygon$circular} from './ol/geom/Polygon.js';\nimport {fromExtent as _ol_geom_Polygon$fromExtent} from './ol/geom/Polygon.js';\nimport {fromCircle as _ol_geom_Polygon$fromCircle} from './ol/geom/Polygon.js';\nimport {makeRegular as _ol_geom_Polygon$makeRegular} from './ol/geom/Polygon.js';\nimport $ol$geom$SimpleGeometry from './ol/geom/SimpleGeometry.js';\nimport {getStrideForLayout as _ol_geom_SimpleGeometry$getStrideForLayout} from './ol/geom/SimpleGeometry.js';\nimport {transformGeom2D as _ol_geom_SimpleGeometry$transformGeom2D} from './ol/geom/SimpleGeometry.js';\nimport {linearRing as _ol_geom_flat_area$linearRing} from './ol/geom/flat/area.js';\nimport {linearRings as _ol_geom_flat_area$linearRings} from './ol/geom/flat/area.js';\nimport {linearRingss as _ol_geom_flat_area$linearRingss} from './ol/geom/flat/area.js';\nimport {linearRingss as _ol_geom_flat_center$linearRingss} from './ol/geom/flat/center.js';\nimport {maxSquaredDelta as _ol_geom_flat_closest$maxSquaredDelta} from './ol/geom/flat/closest.js';\nimport {arrayMaxSquaredDelta as _ol_geom_flat_closest$arrayMaxSquaredDelta} from './ol/geom/flat/closest.js';\nimport {multiArrayMaxSquaredDelta as _ol_geom_flat_closest$multiArrayMaxSquaredDelta} from './ol/geom/flat/closest.js';\nimport {assignClosestPoint as _ol_geom_flat_closest$assignClosestPoint} from './ol/geom/flat/closest.js';\nimport {assignClosestArrayPoint as _ol_geom_flat_closest$assignClosestArrayPoint} from './ol/geom/flat/closest.js';\nimport {assignClosestMultiArrayPoint as _ol_geom_flat_closest$assignClosestMultiArrayPoint} from './ol/geom/flat/closest.js';\nimport {linearRingContainsExtent as _ol_geom_flat_contains$linearRingContainsExtent} from './ol/geom/flat/contains.js';\nimport {linearRingContainsXY as _ol_geom_flat_contains$linearRingContainsXY} from './ol/geom/flat/contains.js';\nimport {linearRingsContainsXY as _ol_geom_flat_contains$linearRingsContainsXY} from './ol/geom/flat/contains.js';\nimport {linearRingssContainsXY as _ol_geom_flat_contains$linearRingssContainsXY} from './ol/geom/flat/contains.js';\nimport {deflateCoordinate as _ol_geom_flat_deflate$deflateCoordinate} from './ol/geom/flat/deflate.js';\nimport {deflateCoordinates as _ol_geom_flat_deflate$deflateCoordinates} from './ol/geom/flat/deflate.js';\nimport {deflateCoordinatesArray as _ol_geom_flat_deflate$deflateCoordinatesArray} from './ol/geom/flat/deflate.js';\nimport {deflateMultiCoordinatesArray as _ol_geom_flat_deflate$deflateMultiCoordinatesArray} from './ol/geom/flat/deflate.js';\nimport {flipXY as _ol_geom_flat_flip$flipXY} from './ol/geom/flat/flip.js';\nimport {greatCircleArc as _ol_geom_flat_geodesic$greatCircleArc} from './ol/geom/flat/geodesic.js';\nimport {meridian as _ol_geom_flat_geodesic$meridian} from './ol/geom/flat/geodesic.js';\nimport {parallel as _ol_geom_flat_geodesic$parallel} from './ol/geom/flat/geodesic.js';\nimport {inflateCoordinates as _ol_geom_flat_inflate$inflateCoordinates} from './ol/geom/flat/inflate.js';\nimport {inflateCoordinatesArray as _ol_geom_flat_inflate$inflateCoordinatesArray} from './ol/geom/flat/inflate.js';\nimport {inflateMultiCoordinatesArray as _ol_geom_flat_inflate$inflateMultiCoordinatesArray} from './ol/geom/flat/inflate.js';\nimport {getInteriorPointOfArray as _ol_geom_flat_interiorpoint$getInteriorPointOfArray} from './ol/geom/flat/interiorpoint.js';\nimport {getInteriorPointsOfMultiArray as _ol_geom_flat_interiorpoint$getInteriorPointsOfMultiArray} from './ol/geom/flat/interiorpoint.js';\nimport {interpolatePoint as _ol_geom_flat_interpolate$interpolatePoint} from './ol/geom/flat/interpolate.js';\nimport {lineStringCoordinateAtM as _ol_geom_flat_interpolate$lineStringCoordinateAtM} from './ol/geom/flat/interpolate.js';\nimport {lineStringsCoordinateAtM as _ol_geom_flat_interpolate$lineStringsCoordinateAtM} from './ol/geom/flat/interpolate.js';\nimport {intersectsLineString as _ol_geom_flat_intersectsextent$intersectsLineString} from './ol/geom/flat/intersectsextent.js';\nimport {intersectsLineStringArray as _ol_geom_flat_intersectsextent$intersectsLineStringArray} from './ol/geom/flat/intersectsextent.js';\nimport {intersectsLinearRing as _ol_geom_flat_intersectsextent$intersectsLinearRing} from './ol/geom/flat/intersectsextent.js';\nimport {intersectsLinearRingArray as _ol_geom_flat_intersectsextent$intersectsLinearRingArray} from './ol/geom/flat/intersectsextent.js';\nimport {intersectsLinearRingMultiArray as _ol_geom_flat_intersectsextent$intersectsLinearRingMultiArray} from './ol/geom/flat/intersectsextent.js';\nimport {lineStringLength as _ol_geom_flat_length$lineStringLength} from './ol/geom/flat/length.js';\nimport {linearRingLength as _ol_geom_flat_length$linearRingLength} from './ol/geom/flat/length.js';\nimport {linearRingIsClockwise as _ol_geom_flat_orient$linearRingIsClockwise} from './ol/geom/flat/orient.js';\nimport {linearRingsAreOriented as _ol_geom_flat_orient$linearRingsAreOriented} from './ol/geom/flat/orient.js';\nimport {linearRingssAreOriented as _ol_geom_flat_orient$linearRingssAreOriented} from './ol/geom/flat/orient.js';\nimport {orientLinearRings as _ol_geom_flat_orient$orientLinearRings} from './ol/geom/flat/orient.js';\nimport {orientLinearRingsArray as _ol_geom_flat_orient$orientLinearRingsArray} from './ol/geom/flat/orient.js';\nimport {inflateEnds as _ol_geom_flat_orient$inflateEnds} from './ol/geom/flat/orient.js';\nimport {coordinates as _ol_geom_flat_reverse$coordinates} from './ol/geom/flat/reverse.js';\nimport {forEach as _ol_geom_flat_segments$forEach} from './ol/geom/flat/segments.js';\nimport {simplifyLineString as _ol_geom_flat_simplify$simplifyLineString} from './ol/geom/flat/simplify.js';\nimport {douglasPeucker as _ol_geom_flat_simplify$douglasPeucker} from './ol/geom/flat/simplify.js';\nimport {douglasPeuckerArray as _ol_geom_flat_simplify$douglasPeuckerArray} from './ol/geom/flat/simplify.js';\nimport {douglasPeuckerMultiArray as _ol_geom_flat_simplify$douglasPeuckerMultiArray} from './ol/geom/flat/simplify.js';\nimport {radialDistance as _ol_geom_flat_simplify$radialDistance} from './ol/geom/flat/simplify.js';\nimport {snap as _ol_geom_flat_simplify$snap} from './ol/geom/flat/simplify.js';\nimport {quantize as _ol_geom_flat_simplify$quantize} from './ol/geom/flat/simplify.js';\nimport {quantizeArray as _ol_geom_flat_simplify$quantizeArray} from './ol/geom/flat/simplify.js';\nimport {quantizeMultiArray as _ol_geom_flat_simplify$quantizeMultiArray} from './ol/geom/flat/simplify.js';\nimport {matchingChunk as _ol_geom_flat_straightchunk$matchingChunk} from './ol/geom/flat/straightchunk.js';\nimport {drawTextOnPath as _ol_geom_flat_textpath$drawTextOnPath} from './ol/geom/flat/textpath.js';\nimport {lineStringIsClosed as _ol_geom_flat_topology$lineStringIsClosed} from './ol/geom/flat/topology.js';\nimport {transform2D as _ol_geom_flat_transform$transform2D} from './ol/geom/flat/transform.js';\nimport {rotate as _ol_geom_flat_transform$rotate} from './ol/geom/flat/transform.js';\nimport {scale as _ol_geom_flat_transform$scale} from './ol/geom/flat/transform.js';\nimport {translate as _ol_geom_flat_transform$translate} from './ol/geom/flat/transform.js';\nimport $ol$format$EsriJSON from './ol/format/EsriJSON.js';\nimport $ol$format$Feature from './ol/format/Feature.js';\nimport {transformGeometryWithOptions as _ol_format_Feature$transformGeometryWithOptions} from './ol/format/Feature.js';\nimport {transformExtentWithOptions as _ol_format_Feature$transformExtentWithOptions} from './ol/format/Feature.js';\nimport $ol$format$GML from './ol/format/GML.js';\nimport $ol$format$GML2 from './ol/format/GML2.js';\nimport $ol$format$GML3 from 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_ol_format_KML$getDefaultStyleArray} from './ol/format/KML.js';\nimport $ol$format$KML from './ol/format/KML.js';\nimport {readFlatCoordinates as _ol_format_KML$readFlatCoordinates} from './ol/format/KML.js';\nimport $ol$format$MVT from './ol/format/MVT.js';\nimport $ol$format$OSMXML from './ol/format/OSMXML.js';\nimport $ol$format$OWS from './ol/format/OWS.js';\nimport $ol$format$Polyline from './ol/format/Polyline.js';\nimport {encodeDeltas as _ol_format_Polyline$encodeDeltas} from './ol/format/Polyline.js';\nimport {decodeDeltas as _ol_format_Polyline$decodeDeltas} from './ol/format/Polyline.js';\nimport {encodeFloats as _ol_format_Polyline$encodeFloats} from './ol/format/Polyline.js';\nimport {decodeFloats as _ol_format_Polyline$decodeFloats} from './ol/format/Polyline.js';\nimport {encodeSignedIntegers as _ol_format_Polyline$encodeSignedIntegers} from './ol/format/Polyline.js';\nimport {decodeSignedIntegers as _ol_format_Polyline$decodeSignedIntegers} from 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$ol$format$XMLFeature from './ol/format/XMLFeature.js';\nimport {and as _ol_format_filter$and} from './ol/format/filter.js';\nimport {or as _ol_format_filter$or} from './ol/format/filter.js';\nimport {not as _ol_format_filter$not} from './ol/format/filter.js';\nimport {bbox as _ol_format_filter$bbox} from './ol/format/filter.js';\nimport {contains as _ol_format_filter$contains} from './ol/format/filter.js';\nimport {intersects as _ol_format_filter$intersects} from './ol/format/filter.js';\nimport {disjoint as _ol_format_filter$disjoint} from './ol/format/filter.js';\nimport {within as _ol_format_filter$within} from './ol/format/filter.js';\nimport {dwithin as _ol_format_filter$dwithin} from './ol/format/filter.js';\nimport {equalTo as _ol_format_filter$equalTo} from './ol/format/filter.js';\nimport {notEqualTo as _ol_format_filter$notEqualTo} from './ol/format/filter.js';\nimport {lessThan as _ol_format_filter$lessThan} from './ol/format/filter.js';\nimport {lessThanOrEqualTo as 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$ol$control$MousePosition;\nol.control.OverviewMap = $ol$control$OverviewMap;\nol.control.Rotate = $ol$control$Rotate;\nol.control.ScaleLine = $ol$control$ScaleLine;\nol.control.Zoom = $ol$control$Zoom;\nol.control.ZoomSlider = $ol$control$ZoomSlider;\nol.control.ZoomToExtent = $ol$control$ZoomToExtent;\nol.control.defaults = {};\nol.control.defaults.defaults = _ol_control_defaults$defaults;\nol.coordinate = {};\nol.coordinate.add = _ol_coordinate$add;\nol.coordinate.closestOnCircle = _ol_coordinate$closestOnCircle;\nol.coordinate.closestOnSegment = _ol_coordinate$closestOnSegment;\nol.coordinate.createStringXY = _ol_coordinate$createStringXY;\nol.coordinate.degreesToStringHDMS = _ol_coordinate$degreesToStringHDMS;\nol.coordinate.distance = _ol_coordinate$distance;\nol.coordinate.equals = _ol_coordinate$equals;\nol.coordinate.format = _ol_coordinate$format;\nol.coordinate.getWorldsAway = _ol_coordinate$getWorldsAway;\nol.coordinate.rotate = _ol_coordinate$rotate;\nol.coordinate.scale = _ol_coordinate$scale;\nol.coordinate.squaredDistance = _ol_coordinate$squaredDistance;\nol.coordinate.squaredDistanceToSegment = _ol_coordinate$squaredDistanceToSegment;\nol.coordinate.toStringHDMS = _ol_coordinate$toStringHDMS;\nol.coordinate.toStringXY = _ol_coordinate$toStringXY;\nol.coordinate.wrapX = _ol_coordinate$wrapX;\nol.css = {};\nol.css.CLASS_COLLAPSED = _ol_css$CLASS_COLLAPSED;\nol.css.CLASS_CONTROL = _ol_css$CLASS_CONTROL;\nol.css.CLASS_HIDDEN = _ol_css$CLASS_HIDDEN;\nol.css.CLASS_SELECTABLE = _ol_css$CLASS_SELECTABLE;\nol.css.CLASS_UNSELECTABLE = _ol_css$CLASS_UNSELECTABLE;\nol.css.CLASS_UNSUPPORTED = _ol_css$CLASS_UNSUPPORTED;\nol.css.getFontParameters = _ol_css$getFontParameters;\nol.dom = {};\nol.dom.createCanvasContext2D = _ol_dom$createCanvasContext2D;\nol.dom.outerHeight = _ol_dom$outerHeight;\nol.dom.outerWidth = _ol_dom$outerWidth;\nol.dom.releaseCanvas = _ol_dom$releaseCanvas;\nol.dom.removeChildren = _ol_dom$removeChildren;\nol.dom.removeNode = 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_ol_events_condition$click;\nol.events.condition.doubleClick = _ol_events_condition$doubleClick;\nol.events.condition.focus = _ol_events_condition$focus;\nol.events.condition.focusWithTabindex = _ol_events_condition$focusWithTabindex;\nol.events.condition.mouseActionButton = _ol_events_condition$mouseActionButton;\nol.events.condition.mouseOnly = _ol_events_condition$mouseOnly;\nol.events.condition.never = _ol_events_condition$never;\nol.events.condition.noModifierKeys = _ol_events_condition$noModifierKeys;\nol.events.condition.penOnly = _ol_events_condition$penOnly;\nol.events.condition.platformModifierKeyOnly = _ol_events_condition$platformModifierKeyOnly;\nol.events.condition.pointerMove = _ol_events_condition$pointerMove;\nol.events.condition.primaryAction = _ol_events_condition$primaryAction;\nol.events.condition.shiftKeyOnly = _ol_events_condition$shiftKeyOnly;\nol.events.condition.singleClick = _ol_events_condition$singleClick;\nol.events.condition.targetNotEditable = _ol_events_condition$targetNotEditable;\nol.events.condition.touchOnly = _ol_events_condition$touchOnly;\nol.events.listen = _ol_events$listen;\nol.events.listenOnce = _ol_events$listenOnce;\nol.events.unlistenByKey = _ol_events$unlistenByKey;\nol.extent = {};\nol.extent.applyTransform = _ol_extent$applyTransform;\nol.extent.approximatelyEquals = _ol_extent$approximatelyEquals;\nol.extent.boundingExtent = _ol_extent$boundingExtent;\nol.extent.buffer = _ol_extent$buffer;\nol.extent.clone = _ol_extent$clone;\nol.extent.closestSquaredDistanceXY = _ol_extent$closestSquaredDistanceXY;\nol.extent.containsCoordinate = _ol_extent$containsCoordinate;\nol.extent.containsExtent = _ol_extent$containsExtent;\nol.extent.containsXY = _ol_extent$containsXY;\nol.extent.coordinateRelationship = _ol_extent$coordinateRelationship;\nol.extent.createEmpty = _ol_extent$createEmpty;\nol.extent.createOrUpdate = _ol_extent$createOrUpdate;\nol.extent.createOrUpdateEmpty = _ol_extent$createOrUpdateEmpty;\nol.extent.createOrUpdateFromCoordinate = _ol_extent$createOrUpdateFromCoordinate;\nol.extent.createOrUpdateFromCoordinates = _ol_extent$createOrUpdateFromCoordinates;\nol.extent.createOrUpdateFromFlatCoordinates = _ol_extent$createOrUpdateFromFlatCoordinates;\nol.extent.createOrUpdateFromRings = _ol_extent$createOrUpdateFromRings;\nol.extent.equals = _ol_extent$equals;\nol.extent.extend = _ol_extent$extend;\nol.extent.extendCoordinate = _ol_extent$extendCoordinate;\nol.extent.extendCoordinates = _ol_extent$extendCoordinates;\nol.extent.extendFlatCoordinates = _ol_extent$extendFlatCoordinates;\nol.extent.extendRings = _ol_extent$extendRings;\nol.extent.extendXY = _ol_extent$extendXY;\nol.extent.forEachCorner = _ol_extent$forEachCorner;\nol.extent.getArea = _ol_extent$getArea;\nol.extent.getBottomLeft = _ol_extent$getBottomLeft;\nol.extent.getBottomRight = _ol_extent$getBottomRight;\nol.extent.getCenter = _ol_extent$getCenter;\nol.extent.getCorner = _ol_extent$getCorner;\nol.extent.getEnlargedArea = _ol_extent$getEnlargedArea;\nol.extent.getForViewAndSize = _ol_extent$getForViewAndSize;\nol.extent.getHeight = _ol_extent$getHeight;\nol.extent.getIntersection = _ol_extent$getIntersection;\nol.extent.getIntersectionArea = _ol_extent$getIntersectionArea;\nol.extent.getMargin = _ol_extent$getMargin;\nol.extent.getRotatedViewport = _ol_extent$getRotatedViewport;\nol.extent.getSize = _ol_extent$getSize;\nol.extent.getTopLeft = _ol_extent$getTopLeft;\nol.extent.getTopRight = _ol_extent$getTopRight;\nol.extent.getWidth = _ol_extent$getWidth;\nol.extent.intersects = _ol_extent$intersects;\nol.extent.intersectsSegment = _ol_extent$intersectsSegment;\nol.extent.isEmpty = _ol_extent$isEmpty;\nol.extent.returnOrUpdate = _ol_extent$returnOrUpdate;\nol.extent.scaleFromCenter = _ol_extent$scaleFromCenter;\nol.extent.wrapAndSliceX = _ol_extent$wrapAndSliceX;\nol.extent.wrapX = _ol_extent$wrapX;\nol.featureloader = {};\nol.featureloader.loadFeaturesXhr = _ol_featureloader$loadFeaturesXhr;\nol.featureloader.setWithCredentials = _ol_featureloader$setWithCredentials;\nol.featureloader.xhr = _ol_featureloader$xhr;\nol.format = {};\nol.format.EsriJSON = $ol$format$EsriJSON;\nol.format.Feature = $ol$format$Feature;\nol.format.Feature.transformExtentWithOptions = _ol_format_Feature$transformExtentWithOptions;\nol.format.Feature.transformGeometryWithOptions = _ol_format_Feature$transformGeometryWithOptions;\nol.format.GML = $ol$format$GML;\nol.format.GML2 = $ol$format$GML2;\nol.format.GML3 = $ol$format$GML3;\nol.format.GML32 = $ol$format$GML32;\nol.format.GMLBase = $ol$format$GMLBase;\nol.format.GMLBase.GMLNS = _ol_format_GMLBase$GMLNS;\nol.format.GPX = $ol$format$GPX;\nol.format.GeoJSON = $ol$format$GeoJSON;\nol.format.IGC = $ol$format$IGC;\nol.format.IIIFInfo = $ol$format$IIIFInfo;\nol.format.JSONFeature = $ol$format$JSONFeature;\nol.format.KML = $ol$format$KML;\nol.format.KML.getDefaultFillStyle = _ol_format_KML$getDefaultFillStyle;\nol.format.KML.getDefaultImageStyle = _ol_format_KML$getDefaultImageStyle;\nol.format.KML.getDefaultStrokeStyle = _ol_format_KML$getDefaultStrokeStyle;\nol.format.KML.getDefaultStyle = _ol_format_KML$getDefaultStyle;\nol.format.KML.getDefaultStyleArray = _ol_format_KML$getDefaultStyleArray;\nol.format.KML.getDefaultTextStyle = _ol_format_KML$getDefaultTextStyle;\nol.format.KML.readFlatCoordinates = _ol_format_KML$readFlatCoordinates;\nol.format.MVT = $ol$format$MVT;\nol.format.OSMXML = $ol$format$OSMXML;\nol.format.OWS = $ol$format$OWS;\nol.format.Polyline = $ol$format$Polyline;\nol.format.Polyline.decodeDeltas = _ol_format_Polyline$decodeDeltas;\nol.format.Polyline.decodeFloats = _ol_format_Polyline$decodeFloats;\nol.format.Polyline.decodeSignedIntegers = _ol_format_Polyline$decodeSignedIntegers;\nol.format.Polyline.decodeUnsignedIntegers = _ol_format_Polyline$decodeUnsignedIntegers;\nol.format.Polyline.encodeDeltas = _ol_format_Polyline$encodeDeltas;\nol.format.Polyline.encodeFloats = _ol_format_Polyline$encodeFloats;\nol.format.Polyline.encodeSignedIntegers = _ol_format_Polyline$encodeSignedIntegers;\nol.format.Polyline.encodeUnsignedInteger = _ol_format_Polyline$encodeUnsignedInteger;\nol.format.Polyline.encodeUnsignedIntegers = _ol_format_Polyline$encodeUnsignedIntegers;\nol.format.TextFeature = $ol$format$TextFeature;\nol.format.TopoJSON = $ol$format$TopoJSON;\nol.format.WFS = $ol$format$WFS;\nol.format.WFS.writeFilter = _ol_format_WFS$writeFilter;\nol.format.WKB = $ol$format$WKB;\nol.format.WKT = $ol$format$WKT;\nol.format.WMSCapabilities = $ol$format$WMSCapabilities;\nol.format.WMSGetFeatureInfo = $ol$format$WMSGetFeatureInfo;\nol.format.WMTSCapabilities = $ol$format$WMTSCapabilities;\nol.format.XML = $ol$format$XML;\nol.format.XMLFeature = $ol$format$XMLFeature;\nol.format.filter = {};\nol.format.filter.And = $ol$format$filter$And;\nol.format.filter.Bbox = $ol$format$filter$Bbox;\nol.format.filter.Comparison = $ol$format$filter$Comparison;\nol.format.filter.ComparisonBinary = $ol$format$filter$ComparisonBinary;\nol.format.filter.Contains = $ol$format$filter$Contains;\nol.format.filter.DWithin = $ol$format$filter$DWithin;\nol.format.filter.Disjoint = $ol$format$filter$Disjoint;\nol.format.filter.During = $ol$format$filter$During;\nol.format.filter.EqualTo = $ol$format$filter$EqualTo;\nol.format.filter.Filter = $ol$format$filter$Filter;\nol.format.filter.GreaterThan = $ol$format$filter$GreaterThan;\nol.format.filter.GreaterThanOrEqualTo = $ol$format$filter$GreaterThanOrEqualTo;\nol.format.filter.Intersects = $ol$format$filter$Intersects;\nol.format.filter.IsBetween = $ol$format$filter$IsBetween;\nol.format.filter.IsLike = $ol$format$filter$IsLike;\nol.format.filter.IsNull = $ol$format$filter$IsNull;\nol.format.filter.LessThan = $ol$format$filter$LessThan;\nol.format.filter.LessThanOrEqualTo = $ol$format$filter$LessThanOrEqualTo;\nol.format.filter.LogicalNary = $ol$format$filter$LogicalNary;\nol.format.filter.Not = $ol$format$filter$Not;\nol.format.filter.NotEqualTo = $ol$format$filter$NotEqualTo;\nol.format.filter.Or = $ol$format$filter$Or;\nol.format.filter.ResourceId = $ol$format$filter$ResourceId;\nol.format.filter.Spatial = $ol$format$filter$Spatial;\nol.format.filter.Within = $ol$format$filter$Within;\nol.format.filter.and = _ol_format_filter$and;\nol.format.filter.bbox = _ol_format_filter$bbox;\nol.format.filter.between = _ol_format_filter$between;\nol.format.filter.contains = _ol_format_filter$contains;\nol.format.filter.disjoint = _ol_format_filter$disjoint;\nol.format.filter.during = _ol_format_filter$during;\nol.format.filter.dwithin = _ol_format_filter$dwithin;\nol.format.filter.equalTo = _ol_format_filter$equalTo;\nol.format.filter.greaterThan = _ol_format_filter$greaterThan;\nol.format.filter.greaterThanOrEqualTo = _ol_format_filter$greaterThanOrEqualTo;\nol.format.filter.intersects = _ol_format_filter$intersects;\nol.format.filter.isNull = _ol_format_filter$isNull;\nol.format.filter.lessThan = _ol_format_filter$lessThan;\nol.format.filter.lessThanOrEqualTo = _ol_format_filter$lessThanOrEqualTo;\nol.format.filter.like = _ol_format_filter$like;\nol.format.filter.not = _ol_format_filter$not;\nol.format.filter.notEqualTo = _ol_format_filter$notEqualTo;\nol.format.filter.or = _ol_format_filter$or;\nol.format.filter.resourceId = _ol_format_filter$resourceId;\nol.format.filter.within = _ol_format_filter$within;\nol.format.xlink = {};\nol.format.xlink.readHref = _ol_format_xlink$readHref;\nol.format.xsd = {};\nol.format.xsd.readBoolean = _ol_format_xsd$readBoolean;\nol.format.xsd.readBooleanString = _ol_format_xsd$readBooleanString;\nol.format.xsd.readDateTime = _ol_format_xsd$readDateTime;\nol.format.xsd.readDecimal = _ol_format_xsd$readDecimal;\nol.format.xsd.readDecimalString = _ol_format_xsd$readDecimalString;\nol.format.xsd.readNonNegativeIntegerString = _ol_format_xsd$readNonNegativeIntegerString;\nol.format.xsd.readPositiveInteger = _ol_format_xsd$readPositiveInteger;\nol.format.xsd.readString = _ol_format_xsd$readString;\nol.format.xsd.writeBooleanTextNode = _ol_format_xsd$writeBooleanTextNode;\nol.format.xsd.writeCDATASection = _ol_format_xsd$writeCDATASection;\nol.format.xsd.writeDateTimeTextNode = _ol_format_xsd$writeDateTimeTextNode;\nol.format.xsd.writeDecimalTextNode = _ol_format_xsd$writeDecimalTextNode;\nol.format.xsd.writeNonNegativeIntegerTextNode = _ol_format_xsd$writeNonNegativeIntegerTextNode;\nol.format.xsd.writeStringTextNode = _ol_format_xsd$writeStringTextNode;\nol.functions = {};\nol.functions.FALSE = _ol_functions$FALSE;\nol.functions.TRUE = _ol_functions$TRUE;\nol.functions.VOID = _ol_functions$VOID;\nol.functions.memoizeOne = _ol_functions$memoizeOne;\nol.functions.toPromise = _ol_functions$toPromise;\nol.geom = {};\nol.geom.Circle = $ol$geom$Circle;\nol.geom.Geometry = $ol$geom$Geometry;\nol.geom.GeometryCollection = $ol$geom$GeometryCollection;\nol.geom.LineString = $ol$geom$LineString;\nol.geom.LinearRing = $ol$geom$LinearRing;\nol.geom.MultiLineString = $ol$geom$MultiLineString;\nol.geom.MultiPoint = $ol$geom$MultiPoint;\nol.geom.MultiPolygon = $ol$geom$MultiPolygon;\nol.geom.Point = $ol$geom$Point;\nol.geom.Polygon = $ol$geom$Polygon;\nol.geom.Polygon.circular = _ol_geom_Polygon$circular;\nol.geom.Polygon.fromCircle = _ol_geom_Polygon$fromCircle;\nol.geom.Polygon.fromExtent = _ol_geom_Polygon$fromExtent;\nol.geom.Polygon.makeRegular = _ol_geom_Polygon$makeRegular;\nol.geom.SimpleGeometry = $ol$geom$SimpleGeometry;\nol.geom.SimpleGeometry.getStrideForLayout = _ol_geom_SimpleGeometry$getStrideForLayout;\nol.geom.SimpleGeometry.transformGeom2D = _ol_geom_SimpleGeometry$transformGeom2D;\nol.geom.flat = {};\nol.geom.flat.area = {};\nol.geom.flat.area.linearRing = _ol_geom_flat_area$linearRing;\nol.geom.flat.area.linearRings = _ol_geom_flat_area$linearRings;\nol.geom.flat.area.linearRingss = _ol_geom_flat_area$linearRingss;\nol.geom.flat.center = {};\nol.geom.flat.center.linearRingss = _ol_geom_flat_center$linearRingss;\nol.geom.flat.closest = {};\nol.geom.flat.closest.arrayMaxSquaredDelta = _ol_geom_flat_closest$arrayMaxSquaredDelta;\nol.geom.flat.closest.assignClosestArrayPoint = _ol_geom_flat_closest$assignClosestArrayPoint;\nol.geom.flat.closest.assignClosestMultiArrayPoint = _ol_geom_flat_closest$assignClosestMultiArrayPoint;\nol.geom.flat.closest.assignClosestPoint = _ol_geom_flat_closest$assignClosestPoint;\nol.geom.flat.closest.maxSquaredDelta = _ol_geom_flat_closest$maxSquaredDelta;\nol.geom.flat.closest.multiArrayMaxSquaredDelta = _ol_geom_flat_closest$multiArrayMaxSquaredDelta;\nol.geom.flat.contains = {};\nol.geom.flat.contains.linearRingContainsExtent = _ol_geom_flat_contains$linearRingContainsExtent;\nol.geom.flat.contains.linearRingContainsXY = _ol_geom_flat_contains$linearRingContainsXY;\nol.geom.flat.contains.linearRingsContainsXY = _ol_geom_flat_contains$linearRingsContainsXY;\nol.geom.flat.contains.linearRingssContainsXY = _ol_geom_flat_contains$linearRingssContainsXY;\nol.geom.flat.deflate = {};\nol.geom.flat.deflate.deflateCoordinate = _ol_geom_flat_deflate$deflateCoordinate;\nol.geom.flat.deflate.deflateCoordinates = _ol_geom_flat_deflate$deflateCoordinates;\nol.geom.flat.deflate.deflateCoordinatesArray = _ol_geom_flat_deflate$deflateCoordinatesArray;\nol.geom.flat.deflate.deflateMultiCoordinatesArray = _ol_geom_flat_deflate$deflateMultiCoordinatesArray;\nol.geom.flat.flip = {};\nol.geom.flat.flip.flipXY = _ol_geom_flat_flip$flipXY;\nol.geom.flat.geodesic = {};\nol.geom.flat.geodesic.greatCircleArc = _ol_geom_flat_geodesic$greatCircleArc;\nol.geom.flat.geodesic.meridian = _ol_geom_flat_geodesic$meridian;\nol.geom.flat.geodesic.parallel = _ol_geom_flat_geodesic$parallel;\nol.geom.flat.inflate = {};\nol.geom.flat.inflate.inflateCoordinates = _ol_geom_flat_inflate$inflateCoordinates;\nol.geom.flat.inflate.inflateCoordinatesArray = _ol_geom_flat_inflate$inflateCoordinatesArray;\nol.geom.flat.inflate.inflateMultiCoordinatesArray = _ol_geom_flat_inflate$inflateMultiCoordinatesArray;\nol.geom.flat.interiorpoint = {};\nol.geom.flat.interiorpoint.getInteriorPointOfArray = _ol_geom_flat_interiorpoint$getInteriorPointOfArray;\nol.geom.flat.interiorpoint.getInteriorPointsOfMultiArray = _ol_geom_flat_interiorpoint$getInteriorPointsOfMultiArray;\nol.geom.flat.interpolate = {};\nol.geom.flat.interpolate.interpolatePoint = _ol_geom_flat_interpolate$interpolatePoint;\nol.geom.flat.interpolate.lineStringCoordinateAtM = _ol_geom_flat_interpolate$lineStringCoordinateAtM;\nol.geom.flat.interpolate.lineStringsCoordinateAtM = _ol_geom_flat_interpolate$lineStringsCoordinateAtM;\nol.geom.flat.intersectsextent = {};\nol.geom.flat.intersectsextent.intersectsLineString = _ol_geom_flat_intersectsextent$intersectsLineString;\nol.geom.flat.intersectsextent.intersectsLineStringArray = _ol_geom_flat_intersectsextent$intersectsLineStringArray;\nol.geom.flat.intersectsextent.intersectsLinearRing = _ol_geom_flat_intersectsextent$intersectsLinearRing;\nol.geom.flat.intersectsextent.intersectsLinearRingArray = _ol_geom_flat_intersectsextent$intersectsLinearRingArray;\nol.geom.flat.intersectsextent.intersectsLinearRingMultiArray = _ol_geom_flat_intersectsextent$intersectsLinearRingMultiArray;\nol.geom.flat.length = {};\nol.geom.flat.length.lineStringLength = _ol_geom_flat_length$lineStringLength;\nol.geom.flat.length.linearRingLength = _ol_geom_flat_length$linearRingLength;\nol.geom.flat.orient = {};\nol.geom.flat.orient.inflateEnds = _ol_geom_flat_orient$inflateEnds;\nol.geom.flat.orient.linearRingIsClockwise = _ol_geom_flat_orient$linearRingIsClockwise;\nol.geom.flat.orient.linearRingsAreOriented = _ol_geom_flat_orient$linearRingsAreOriented;\nol.geom.flat.orient.linearRingssAreOriented = _ol_geom_flat_orient$linearRingssAreOriented;\nol.geom.flat.orient.orientLinearRings = _ol_geom_flat_orient$orientLinearRings;\nol.geom.flat.orient.orientLinearRingsArray = _ol_geom_flat_orient$orientLinearRingsArray;\nol.geom.flat.reverse = {};\nol.geom.flat.reverse.coordinates = _ol_geom_flat_reverse$coordinates;\nol.geom.flat.segments = {};\nol.geom.flat.segments.forEach = _ol_geom_flat_segments$forEach;\nol.geom.flat.simplify = {};\nol.geom.flat.simplify.douglasPeucker = _ol_geom_flat_simplify$douglasPeucker;\nol.geom.flat.simplify.douglasPeuckerArray = _ol_geom_flat_simplify$douglasPeuckerArray;\nol.geom.flat.simplify.douglasPeuckerMultiArray = _ol_geom_flat_simplify$douglasPeuckerMultiArray;\nol.geom.flat.simplify.quantize = _ol_geom_flat_simplify$quantize;\nol.geom.flat.simplify.quantizeArray = _ol_geom_flat_simplify$quantizeArray;\nol.geom.flat.simplify.quantizeMultiArray = _ol_geom_flat_simplify$quantizeMultiArray;\nol.geom.flat.simplify.radialDistance = _ol_geom_flat_simplify$radialDistance;\nol.geom.flat.simplify.simplifyLineString = _ol_geom_flat_simplify$simplifyLineString;\nol.geom.flat.simplify.snap = _ol_geom_flat_simplify$snap;\nol.geom.flat.straightchunk = {};\nol.geom.flat.straightchunk.matchingChunk = _ol_geom_flat_straightchunk$matchingChunk;\nol.geom.flat.textpath = {};\nol.geom.flat.textpath.drawTextOnPath = _ol_geom_flat_textpath$drawTextOnPath;\nol.geom.flat.topology = {};\nol.geom.flat.topology.lineStringIsClosed = _ol_geom_flat_topology$lineStringIsClosed;\nol.geom.flat.transform = {};\nol.geom.flat.transform.rotate = _ol_geom_flat_transform$rotate;\nol.geom.flat.transform.scale = _ol_geom_flat_transform$scale;\nol.geom.flat.transform.transform2D = _ol_geom_flat_transform$transform2D;\nol.geom.flat.transform.translate = _ol_geom_flat_transform$translate;\nol.has = {};\nol.has.DEVICE_PIXEL_RATIO = _ol_has$DEVICE_PIXEL_RATIO;\nol.has.FIREFOX = _ol_has$FIREFOX;\nol.has.IMAGE_DECODE = _ol_has$IMAGE_DECODE;\nol.has.MAC = _ol_has$MAC;\nol.has.PASSIVE_EVENT_LISTENERS = _ol_has$PASSIVE_EVENT_LISTENERS;\nol.has.SAFARI = _ol_has$SAFARI;\nol.has.SAFARI_BUG_237906 = _ol_has$SAFARI_BUG_237906;\nol.has.WEBKIT = _ol_has$WEBKIT;\nol.has.WORKER_OFFSCREEN_CANVAS = _ol_has$WORKER_OFFSCREEN_CANVAS;\nol.interaction = {};\nol.interaction.DblClickDragZoom = $ol$interaction$DblClickDragZoom;\nol.interaction.DoubleClickZoom = $ol$interaction$DoubleClickZoom;\nol.interaction.DragAndDrop = $ol$interaction$DragAndDrop;\nol.interaction.DragAndDrop.DragAndDropEvent = _ol_interaction_DragAndDrop$DragAndDropEvent;\nol.interaction.DragBox = $ol$interaction$DragBox;\nol.interaction.DragBox.DragBoxEvent = _ol_interaction_DragBox$DragBoxEvent;\nol.interaction.DragPan = $ol$interaction$DragPan;\nol.interaction.DragRotate = $ol$interaction$DragRotate;\nol.interaction.DragRotateAndZoom = $ol$interaction$DragRotateAndZoom;\nol.interaction.DragZoom = $ol$interaction$DragZoom;\nol.interaction.Draw = $ol$interaction$Draw;\nol.interaction.Draw.DrawEvent = _ol_interaction_Draw$DrawEvent;\nol.interaction.Draw.createBox = _ol_interaction_Draw$createBox;\nol.interaction.Draw.createRegularPolygon = _ol_interaction_Draw$createRegularPolygon;\nol.interaction.Extent = $ol$interaction$Extent;\nol.interaction.Extent.ExtentEvent = _ol_interaction_Extent$ExtentEvent;\nol.interaction.Interaction = $ol$interaction$Interaction;\nol.interaction.Interaction.pan = _ol_interaction_Interaction$pan;\nol.interaction.Interaction.zoomByDelta = _ol_interaction_Interaction$zoomByDelta;\nol.interaction.KeyboardPan = $ol$interaction$KeyboardPan;\nol.interaction.KeyboardZoom = $ol$interaction$KeyboardZoom;\nol.interaction.Link = $ol$interaction$Link;\nol.interaction.Modify = $ol$interaction$Modify;\nol.interaction.Modify.ModifyEvent = _ol_interaction_Modify$ModifyEvent;\nol.interaction.MouseWheelZoom = $ol$interaction$MouseWheelZoom;\nol.interaction.PinchRotate = $ol$interaction$PinchRotate;\nol.interaction.PinchZoom = $ol$interaction$PinchZoom;\nol.interaction.Pointer = $ol$interaction$Pointer;\nol.interaction.Pointer.centroid = _ol_interaction_Pointer$centroid;\nol.interaction.Select = $ol$interaction$Select;\nol.interaction.Select.SelectEvent = _ol_interaction_Select$SelectEvent;\nol.interaction.Snap = $ol$interaction$Snap;\nol.interaction.Translate = $ol$interaction$Translate;\nol.interaction.Translate.TranslateEvent = _ol_interaction_Translate$TranslateEvent;\nol.interaction.defaults = {};\nol.interaction.defaults.defaults = _ol_interaction_defaults$defaults;\nol.layer = {};\nol.layer.Base = $ol$layer$Base;\nol.layer.BaseImage = $ol$layer$BaseImage;\nol.layer.BaseTile = $ol$layer$BaseTile;\nol.layer.BaseVector = $ol$layer$BaseVector;\nol.layer.Graticule = $ol$layer$Graticule;\nol.layer.Group = $ol$layer$Group;\nol.layer.Group.GroupEvent = _ol_layer_Group$GroupEvent;\nol.layer.Heatmap = $ol$layer$Heatmap;\nol.layer.Image = $ol$layer$Image;\nol.layer.Layer = $ol$layer$Layer;\nol.layer.Layer.inView = _ol_layer_Layer$inView;\nol.layer.MapboxVector = $ol$layer$MapboxVector;\nol.layer.Tile = $ol$layer$Tile;\nol.layer.Vector = $ol$layer$Vector;\nol.layer.VectorImage = $ol$layer$VectorImage;\nol.layer.VectorTile = $ol$layer$VectorTile;\nol.layer.WebGLPoints = $ol$layer$WebGLPoints;\nol.layer.WebGLTile = $ol$layer$WebGLTile;\nol.loadingstrategy = {};\nol.loadingstrategy.all = _ol_loadingstrategy$all;\nol.loadingstrategy.bbox = _ol_loadingstrategy$bbox;\nol.loadingstrategy.tile = _ol_loadingstrategy$tile;\nol.math = {};\nol.math.ceil = _ol_math$ceil;\nol.math.clamp = _ol_math$clamp;\nol.math.floor = _ol_math$floor;\nol.math.lerp = _ol_math$lerp;\nol.math.modulo = _ol_math$modulo;\nol.math.round = _ol_math$round;\nol.math.solveLinearSystem = _ol_math$solveLinearSystem;\nol.math.squaredDistance = _ol_math$squaredDistance;\nol.math.squaredSegmentDistance = _ol_math$squaredSegmentDistance;\nol.math.toDegrees = _ol_math$toDegrees;\nol.math.toFixed = _ol_math$toFixed;\nol.math.toRadians = _ol_math$toRadians;\nol.net = {};\nol.net.ClientError = _ol_net$ClientError;\nol.net.ResponseError = _ol_net$ResponseError;\nol.net.getJSON = _ol_net$getJSON;\nol.net.jsonp = _ol_net$jsonp;\nol.net.overrideXHR = _ol_net$overrideXHR;\nol.net.resolveUrl = _ol_net$resolveUrl;\nol.net.restoreXHR = _ol_net$restoreXHR;\nol.obj = {};\nol.obj.clear = _ol_obj$clear;\nol.obj.isEmpty = _ol_obj$isEmpty;\nol.proj = {};\nol.proj.Projection = $ol$proj$Projection;\nol.proj.Units = {};\nol.proj.Units.METERS_PER_UNIT = _ol_proj_Units$METERS_PER_UNIT;\nol.proj.Units.fromCode = _ol_proj_Units$fromCode;\nol.proj.addCommon = _ol_proj$addCommon;\nol.proj.addCoordinateTransforms = _ol_proj$addCoordinateTransforms;\nol.proj.addEquivalentProjections = _ol_proj$addEquivalentProjections;\nol.proj.addEquivalentTransforms = _ol_proj$addEquivalentTransforms;\nol.proj.addProjection = _ol_proj$addProjection;\nol.proj.addProjections = _ol_proj$addProjections;\nol.proj.clearAllProjections = _ol_proj$clearAllProjections;\nol.proj.clearUserProjection = _ol_proj$clearUserProjection;\nol.proj.cloneTransform = _ol_proj$cloneTransform;\nol.proj.createProjection = _ol_proj$createProjection;\nol.proj.createSafeCoordinateTransform = _ol_proj$createSafeCoordinateTransform;\nol.proj.createTransformFromCoordinateTransform = _ol_proj$createTransformFromCoordinateTransform;\nol.proj.disableCoordinateWarning = _ol_proj$disableCoordinateWarning;\nol.proj.epsg3857 = {};\nol.proj.epsg3857.EXTENT = _ol_proj_epsg3857$EXTENT;\nol.proj.epsg3857.HALF_SIZE = _ol_proj_epsg3857$HALF_SIZE;\nol.proj.epsg3857.MAX_SAFE_Y = _ol_proj_epsg3857$MAX_SAFE_Y;\nol.proj.epsg3857.PROJECTIONS = _ol_proj_epsg3857$PROJECTIONS;\nol.proj.epsg3857.RADIUS = _ol_proj_epsg3857$RADIUS;\nol.proj.epsg3857.WORLD_EXTENT = _ol_proj_epsg3857$WORLD_EXTENT;\nol.proj.epsg3857.fromEPSG4326 = _ol_proj_epsg3857$fromEPSG4326;\nol.proj.epsg3857.toEPSG4326 = _ol_proj_epsg3857$toEPSG4326;\nol.proj.epsg4326 = {};\nol.proj.epsg4326.EXTENT = _ol_proj_epsg4326$EXTENT;\nol.proj.epsg4326.METERS_PER_UNIT = _ol_proj_epsg4326$METERS_PER_UNIT;\nol.proj.epsg4326.PROJECTIONS = _ol_proj_epsg4326$PROJECTIONS;\nol.proj.epsg4326.RADIUS = _ol_proj_epsg4326$RADIUS;\nol.proj.equivalent = _ol_proj$equivalent;\nol.proj.fromLonLat = _ol_proj$fromLonLat;\nol.proj.fromUserCoordinate = _ol_proj$fromUserCoordinate;\nol.proj.fromUserExtent = _ol_proj$fromUserExtent;\nol.proj.fromUserResolution = _ol_proj$fromUserResolution;\nol.proj.get = _ol_proj$get;\nol.proj.getPointResolution = _ol_proj$getPointResolution;\nol.proj.getTransform = _ol_proj$getTransform;\nol.proj.getTransformFromProjections = _ol_proj$getTransformFromProjections;\nol.proj.getUserProjection = _ol_proj$getUserProjection;\nol.proj.identityTransform = _ol_proj$identityTransform;\nol.proj.proj4 = {};\nol.proj.proj4.epsgLookupMapTiler = _ol_proj_proj4$epsgLookupMapTiler;\nol.proj.proj4.fromEPSGCode = _ol_proj_proj4$fromEPSGCode;\nol.proj.proj4.getEPSGLookup = _ol_proj_proj4$getEPSGLookup;\nol.proj.proj4.isRegistered = _ol_proj_proj4$isRegistered;\nol.proj.proj4.register = _ol_proj_proj4$register;\nol.proj.proj4.setEPSGLookup = _ol_proj_proj4$setEPSGLookup;\nol.proj.proj4.unregister = _ol_proj_proj4$unregister;\nol.proj.projections = {};\nol.proj.projections.add = _ol_proj_projections$add;\nol.proj.projections.clear = _ol_proj_projections$clear;\nol.proj.projections.get = _ol_proj_projections$get;\nol.proj.setUserProjection = _ol_proj$setUserProjection;\nol.proj.toLonLat = _ol_proj$toLonLat;\nol.proj.toUserCoordinate = _ol_proj$toUserCoordinate;\nol.proj.toUserExtent = _ol_proj$toUserExtent;\nol.proj.toUserResolution = _ol_proj$toUserResolution;\nol.proj.transform = _ol_proj$transform;\nol.proj.transformExtent = _ol_proj$transformExtent;\nol.proj.transformWithProjections = _ol_proj$transformWithProjections;\nol.proj.transforms = {};\nol.proj.transforms.add = _ol_proj_transforms$add;\nol.proj.transforms.clear = _ol_proj_transforms$clear;\nol.proj.transforms.get = _ol_proj_transforms$get;\nol.proj.transforms.remove = _ol_proj_transforms$remove;\nol.proj.useGeographic = _ol_proj$useGeographic;\nol.render = {};\nol.render.Box = $ol$render$Box;\nol.render.Event = $ol$render$Event;\nol.render.Feature = $ol$render$Feature;\nol.render.Feature.toFeature = _ol_render_Feature$toFeature;\nol.render.Feature.toGeometry = _ol_render_Feature$toGeometry;\nol.render.VectorContext = $ol$render$VectorContext;\nol.render.canvas = {};\nol.render.canvas.Builder = $ol$render$canvas$Builder;\nol.render.canvas.BuilderGroup = $ol$render$canvas$BuilderGroup;\nol.render.canvas.Executor = $ol$render$canvas$Executor;\nol.render.canvas.ExecutorGroup = $ol$render$canvas$ExecutorGroup;\nol.render.canvas.ExecutorGroup.getPixelIndexArray = _ol_render_canvas_ExecutorGroup$getPixelIndexArray;\nol.render.canvas.ImageBuilder = $ol$render$canvas$ImageBuilder;\nol.render.canvas.Immediate = $ol$render$canvas$Immediate;\nol.render.canvas.Instruction = {};\nol.render.canvas.Instruction.beginPathInstruction = _ol_render_canvas_Instruction$beginPathInstruction;\nol.render.canvas.Instruction.closePathInstruction = _ol_render_canvas_Instruction$closePathInstruction;\nol.render.canvas.Instruction.fillInstruction = _ol_render_canvas_Instruction$fillInstruction;\nol.render.canvas.Instruction.strokeInstruction = _ol_render_canvas_Instruction$strokeInstruction;\nol.render.canvas.LineStringBuilder = $ol$render$canvas$LineStringBuilder;\nol.render.canvas.PolygonBuilder = $ol$render$canvas$PolygonBuilder;\nol.render.canvas.TextBuilder = $ol$render$canvas$TextBuilder;\nol.render.canvas.checkedFonts = _ol_render_canvas$checkedFonts;\nol.render.canvas.defaultFillStyle = _ol_render_canvas$defaultFillStyle;\nol.render.canvas.defaultFont = _ol_render_canvas$defaultFont;\nol.render.canvas.defaultLineCap = _ol_render_canvas$defaultLineCap;\nol.render.canvas.defaultLineDash = _ol_render_canvas$defaultLineDash;\nol.render.canvas.defaultLineDashOffset = _ol_render_canvas$defaultLineDashOffset;\nol.render.canvas.defaultLineJoin = _ol_render_canvas$defaultLineJoin;\nol.render.canvas.defaultLineWidth = _ol_render_canvas$defaultLineWidth;\nol.render.canvas.defaultMiterLimit = _ol_render_canvas$defaultMiterLimit;\nol.render.canvas.defaultPadding = _ol_render_canvas$defaultPadding;\nol.render.canvas.defaultStrokeStyle = _ol_render_canvas$defaultStrokeStyle;\nol.render.canvas.defaultTextAlign = _ol_render_canvas$defaultTextAlign;\nol.render.canvas.defaultTextBaseline = _ol_render_canvas$defaultTextBaseline;\nol.render.canvas.drawImageOrLabel = _ol_render_canvas$drawImageOrLabel;\nol.render.canvas.getTextDimensions = _ol_render_canvas$getTextDimensions;\nol.render.canvas.hitdetect = {};\nol.render.canvas.hitdetect.HIT_DETECT_RESOLUTION = _ol_render_canvas_hitdetect$HIT_DETECT_RESOLUTION;\nol.render.canvas.hitdetect.createHitDetectionImageData = _ol_render_canvas_hitdetect$createHitDetectionImageData;\nol.render.canvas.hitdetect.hitDetect = _ol_render_canvas_hitdetect$hitDetect;\nol.render.canvas.measureAndCacheTextWidth = _ol_render_canvas$measureAndCacheTextWidth;\nol.render.canvas.measureTextHeight = _ol_render_canvas$measureTextHeight;\nol.render.canvas.measureTextWidth = _ol_render_canvas$measureTextWidth;\nol.render.canvas.registerFont = _ol_render_canvas$registerFont;\nol.render.canvas.rotateAtOffset = _ol_render_canvas$rotateAtOffset;\nol.render.canvas.textHeights = _ol_render_canvas$textHeights;\nol.render.getRenderPixel = _ol_render$getRenderPixel;\nol.render.getVectorContext = _ol_render$getVectorContext;\nol.render.toContext = _ol_render$toContext;\nol.render.webgl = {};\nol.render.webgl.MixedGeometryBatch = $ol$render$webgl$MixedGeometryBatch;\nol.render.webgl.VectorStyleRenderer = $ol$render$webgl$VectorStyleRenderer;\nol.render.webgl.renderinstructions = {};\nol.render.webgl.renderinstructions.generateLineStringRenderInstructions = _ol_render_webgl_renderinstructions$generateLineStringRenderInstructions;\nol.render.webgl.renderinstructions.generatePointRenderInstructions = _ol_render_webgl_renderinstructions$generatePointRenderInstructions;\nol.render.webgl.renderinstructions.generatePolygonRenderInstructions = _ol_render_webgl_renderinstructions$generatePolygonRenderInstructions;\nol.render.webgl.renderinstructions.getCustomAttributesSize = _ol_render_webgl_renderinstructions$getCustomAttributesSize;\nol.render.webgl.utils = {};\nol.render.webgl.utils.colorDecodeId = _ol_render_webgl_utils$colorDecodeId;\nol.render.webgl.utils.colorEncodeId = _ol_render_webgl_utils$colorEncodeId;\nol.render.webgl.utils.getBlankImageData = _ol_render_webgl_utils$getBlankImageData;\nol.render.webgl.utils.writeLineSegmentToBuffers = _ol_render_webgl_utils$writeLineSegmentToBuffers;\nol.render.webgl.utils.writePointFeatureToBuffers = _ol_render_webgl_utils$writePointFeatureToBuffers;\nol.render.webgl.utils.writePolygonTrianglesToBuffers = _ol_render_webgl_utils$writePolygonTrianglesToBuffers;\nol.renderer = {};\nol.renderer.Composite = $ol$renderer$Composite;\nol.renderer.Layer = $ol$renderer$Layer;\nol.renderer.Map = $ol$renderer$Map;\nol.renderer.canvas = {};\nol.renderer.canvas.ImageLayer = $ol$renderer$canvas$ImageLayer;\nol.renderer.canvas.Layer = $ol$renderer$canvas$Layer;\nol.renderer.canvas.Layer.canvasPool = _ol_renderer_canvas_Layer$canvasPool;\nol.renderer.canvas.TileLayer = $ol$renderer$canvas$TileLayer;\nol.renderer.canvas.VectorImageLayer = $ol$renderer$canvas$VectorImageLayer;\nol.renderer.canvas.VectorLayer = $ol$renderer$canvas$VectorLayer;\nol.renderer.canvas.VectorTileLayer = $ol$renderer$canvas$VectorTileLayer;\nol.renderer.vector = {};\nol.renderer.vector.defaultOrder = _ol_renderer_vector$defaultOrder;\nol.renderer.vector.getSquaredTolerance = _ol_renderer_vector$getSquaredTolerance;\nol.renderer.vector.getTolerance = _ol_renderer_vector$getTolerance;\nol.renderer.vector.renderFeature = _ol_renderer_vector$renderFeature;\nol.renderer.webgl = {};\nol.renderer.webgl.Layer = $ol$renderer$webgl$Layer;\nol.renderer.webgl.PointsLayer = $ol$renderer$webgl$PointsLayer;\nol.renderer.webgl.TileLayer = $ol$renderer$webgl$TileLayer;\nol.renderer.webgl.TileLayer.Attributes = _ol_renderer_webgl_TileLayer$Attributes;\nol.renderer.webgl.TileLayer.Uniforms = _ol_renderer_webgl_TileLayer$Uniforms;\nol.renderer.webgl.TileLayerBase = $ol$renderer$webgl$TileLayerBase;\nol.renderer.webgl.TileLayerBase.Uniforms = _ol_renderer_webgl_TileLayerBase$Uniforms;\nol.renderer.webgl.TileLayerBase.getCacheKey = _ol_renderer_webgl_TileLayerBase$getCacheKey;\nol.renderer.webgl.TileLayerBase.newTileRepresentationLookup = _ol_renderer_webgl_TileLayerBase$newTileRepresentationLookup;\nol.renderer.webgl.VectorLayer = $ol$renderer$webgl$VectorLayer;\nol.renderer.webgl.VectorLayer.Uniforms = _ol_renderer_webgl_VectorLayer$Uniforms;\nol.renderer.webgl.VectorTileLayer = $ol$renderer$webgl$VectorTileLayer;\nol.reproj = {};\nol.reproj.DataTile = $ol$reproj$DataTile;\nol.reproj.Image = $ol$reproj$Image;\nol.reproj.Tile = $ol$reproj$Tile;\nol.reproj.Triangulation = $ol$reproj$Triangulation;\nol.reproj.calculateSourceExtentResolution = _ol_reproj$calculateSourceExtentResolution;\nol.reproj.calculateSourceResolution = _ol_reproj$calculateSourceResolution;\nol.reproj.canvasPool = _ol_reproj$canvasPool;\nol.reproj.common = {};\nol.reproj.common.ERROR_THRESHOLD = _ol_reproj_common$ERROR_THRESHOLD;\nol.reproj.render = _ol_reproj$render;\nol.resolutionconstraint = {};\nol.resolutionconstraint.createMinMaxResolution = _ol_resolutionconstraint$createMinMaxResolution;\nol.resolutionconstraint.createSnapToPower = _ol_resolutionconstraint$createSnapToPower;\nol.resolutionconstraint.createSnapToResolutions = _ol_resolutionconstraint$createSnapToResolutions;\nol.rotationconstraint = {};\nol.rotationconstraint.createSnapToN = _ol_rotationconstraint$createSnapToN;\nol.rotationconstraint.createSnapToZero = _ol_rotationconstraint$createSnapToZero;\nol.rotationconstraint.disable = _ol_rotationconstraint$disable;\nol.rotationconstraint.none = _ol_rotationconstraint$none;\nol.size = {};\nol.size.buffer = _ol_size$buffer;\nol.size.hasArea = _ol_size$hasArea;\nol.size.scale = _ol_size$scale;\nol.size.toSize = _ol_size$toSize;\nol.source = {};\nol.source.BingMaps = $ol$source$BingMaps;\nol.source.BingMaps.quadKey = _ol_source_BingMaps$quadKey;\nol.source.CartoDB = $ol$source$CartoDB;\nol.source.Cluster = $ol$source$Cluster;\nol.source.DataTile = $ol$source$DataTile;\nol.source.GeoTIFF = $ol$source$GeoTIFF;\nol.source.IIIF = $ol$source$IIIF;\nol.source.Image = $ol$source$Image;\nol.source.Image.ImageSourceEvent = _ol_source_Image$ImageSourceEvent;\nol.source.Image.defaultImageLoadFunction = _ol_source_Image$defaultImageLoadFunction;\nol.source.ImageArcGISRest = $ol$source$ImageArcGISRest;\nol.source.ImageCanvas = $ol$source$ImageCanvas;\nol.source.ImageMapGuide = $ol$source$ImageMapGuide;\nol.source.ImageStatic = $ol$source$ImageStatic;\nol.source.ImageWMS = $ol$source$ImageWMS;\nol.source.OGCMapTile = $ol$source$OGCMapTile;\nol.source.OGCVectorTile = $ol$source$OGCVectorTile;\nol.source.OSM = $ol$source$OSM;\nol.source.OSM.ATTRIBUTION = _ol_source_OSM$ATTRIBUTION;\nol.source.Raster = $ol$source$Raster;\nol.source.Raster.Processor = _ol_source_Raster$Processor;\nol.source.Raster.RasterSourceEvent = _ol_source_Raster$RasterSourceEvent;\nol.source.Raster.newImageData = _ol_source_Raster$newImageData;\nol.source.Source = $ol$source$Source;\nol.source.Stamen = $ol$source$Stamen;\nol.source.Tile = $ol$source$Tile;\nol.source.Tile.TileSourceEvent = _ol_source_Tile$TileSourceEvent;\nol.source.TileArcGISRest = $ol$source$TileArcGISRest;\nol.source.TileDebug = $ol$source$TileDebug;\nol.source.TileImage = $ol$source$TileImage;\nol.source.TileJSON = $ol$source$TileJSON;\nol.source.TileWMS = $ol$source$TileWMS;\nol.source.UTFGrid = $ol$source$UTFGrid;\nol.source.UTFGrid.CustomTile = _ol_source_UTFGrid$CustomTile;\nol.source.UrlTile = $ol$source$UrlTile;\nol.source.Vector = $ol$source$Vector;\nol.source.Vector.VectorSourceEvent = _ol_source_Vector$VectorSourceEvent;\nol.source.VectorTile = $ol$source$VectorTile;\nol.source.VectorTile.defaultLoadFunction = _ol_source_VectorTile$defaultLoadFunction;\nol.source.WMTS = $ol$source$WMTS;\nol.source.WMTS.optionsFromCapabilities = _ol_source_WMTS$optionsFromCapabilities;\nol.source.XYZ = $ol$source$XYZ;\nol.source.Zoomify = $ol$source$Zoomify;\nol.source.Zoomify.CustomTile = _ol_source_Zoomify$CustomTile;\nol.source.common = {};\nol.source.common.DEFAULT_WMS_VERSION = _ol_source_common$DEFAULT_WMS_VERSION;\nol.source.ogcTileUtil = {};\nol.source.ogcTileUtil.getMapTileUrlTemplate = _ol_source_ogcTileUtil$getMapTileUrlTemplate;\nol.source.ogcTileUtil.getTileSetInfo = _ol_source_ogcTileUtil$getTileSetInfo;\nol.source.ogcTileUtil.getVectorTileUrlTemplate = _ol_source_ogcTileUtil$getVectorTileUrlTemplate;\nol.source.sourcesFromTileGrid = _ol_source$sourcesFromTileGrid;\nol.source.wms = {};\nol.source.wms.DEFAULT_VERSION = _ol_source_wms$DEFAULT_VERSION;\nol.sphere = {};\nol.sphere.DEFAULT_RADIUS = _ol_sphere$DEFAULT_RADIUS;\nol.sphere.getArea = _ol_sphere$getArea;\nol.sphere.getDistance = _ol_sphere$getDistance;\nol.sphere.getLength = _ol_sphere$getLength;\nol.sphere.offset = _ol_sphere$offset;\nol.string = {};\nol.string.compareVersions = _ol_string$compareVersions;\nol.string.padNumber = _ol_string$padNumber;\nol.structs = {};\nol.structs.LRUCache = $ol$structs$LRUCache;\nol.structs.LinkedList = $ol$structs$LinkedList;\nol.structs.PriorityQueue = $ol$structs$PriorityQueue;\nol.structs.PriorityQueue.DROP = _ol_structs_PriorityQueue$DROP;\nol.structs.RBush = $ol$structs$RBush;\nol.style = {};\nol.style.Circle = $ol$style$Circle;\nol.style.Fill = $ol$style$Fill;\nol.style.Icon = $ol$style$Icon;\nol.style.IconImage = $ol$style$IconImage;\nol.style.IconImage.get = _ol_style_IconImage$get;\nol.style.IconImageCache = $ol$style$IconImageCache;\nol.style.IconImageCache.shared = _ol_style_IconImageCache$shared;\nol.style.Image = $ol$style$Image;\nol.style.RegularShape = $ol$style$RegularShape;\nol.style.Stroke = $ol$style$Stroke;\nol.style.Style = $ol$style$Style;\nol.style.Style.createDefaultStyle = _ol_style_Style$createDefaultStyle;\nol.style.Style.createEditingStyle = _ol_style_Style$createEditingStyle;\nol.style.Style.toFunction = _ol_style_Style$toFunction;\nol.style.Text = $ol$style$Text;\nol.style.expressions = {};\nol.style.expressions.Operators = _ol_style_expressions$Operators;\nol.style.expressions.PALETTE_TEXTURE_ARRAY = _ol_style_expressions$PALETTE_TEXTURE_ARRAY;\nol.style.expressions.arrayToGlsl = _ol_style_expressions$arrayToGlsl;\nol.style.expressions.colorToGlsl = _ol_style_expressions$colorToGlsl;\nol.style.expressions.expressionToGlsl = _ol_style_expressions$expressionToGlsl;\nol.style.expressions.getStringNumberEquivalent = _ol_style_expressions$getStringNumberEquivalent;\nol.style.expressions.getValueType = _ol_style_expressions$getValueType;\nol.style.expressions.isTypeUnique = _ol_style_expressions$isTypeUnique;\nol.style.expressions.numberToGlsl = _ol_style_expressions$numberToGlsl;\nol.style.expressions.stringToGlsl = _ol_style_expressions$stringToGlsl;\nol.style.expressions.uniformNameForVariable = _ol_style_expressions$uniformNameForVariable;\nol.style.flat = {};\nol.style.flat.createDefaultStyle = _ol_style_flat$createDefaultStyle;\nol.style.flat.toStyle = _ol_style_flat$toStyle;\nol.tilecoord = {};\nol.tilecoord.createOrUpdate = _ol_tilecoord$createOrUpdate;\nol.tilecoord.fromKey = _ol_tilecoord$fromKey;\nol.tilecoord.getCacheKeyForTileKey = _ol_tilecoord$getCacheKeyForTileKey;\nol.tilecoord.getKey = _ol_tilecoord$getKey;\nol.tilecoord.getKeyZXY = _ol_tilecoord$getKeyZXY;\nol.tilecoord.hash = _ol_tilecoord$hash;\nol.tilecoord.withinExtentAndZ = _ol_tilecoord$withinExtentAndZ;\nol.tilegrid = {};\nol.tilegrid.TileGrid = $ol$tilegrid$TileGrid;\nol.tilegrid.WMTS = $ol$tilegrid$WMTS;\nol.tilegrid.WMTS.createFromCapabilitiesMatrixSet = _ol_tilegrid_WMTS$createFromCapabilitiesMatrixSet;\nol.tilegrid.common = {};\nol.tilegrid.common.DEFAULT_MAX_ZOOM = _ol_tilegrid_common$DEFAULT_MAX_ZOOM;\nol.tilegrid.common.DEFAULT_TILE_SIZE = _ol_tilegrid_common$DEFAULT_TILE_SIZE;\nol.tilegrid.createForExtent = _ol_tilegrid$createForExtent;\nol.tilegrid.createForProjection = _ol_tilegrid$createForProjection;\nol.tilegrid.createXYZ = _ol_tilegrid$createXYZ;\nol.tilegrid.extentFromProjection = _ol_tilegrid$extentFromProjection;\nol.tilegrid.getForProjection = _ol_tilegrid$getForProjection;\nol.tilegrid.wrapX = _ol_tilegrid$wrapX;\nol.tileurlfunction = {};\nol.tileurlfunction.createFromTemplate = _ol_tileurlfunction$createFromTemplate;\nol.tileurlfunction.createFromTemplates = _ol_tileurlfunction$createFromTemplates;\nol.tileurlfunction.createFromTileUrlFunctions = _ol_tileurlfunction$createFromTileUrlFunctions;\nol.tileurlfunction.expandUrl = _ol_tileurlfunction$expandUrl;\nol.tileurlfunction.nullTileUrlFunction = _ol_tileurlfunction$nullTileUrlFunction;\nol.transform = {};\nol.transform.apply = _ol_transform$apply;\nol.transform.compose = _ol_transform$compose;\nol.transform.composeCssTransform = _ol_transform$composeCssTransform;\nol.transform.create = _ol_transform$create;\nol.transform.determinant = _ol_transform$determinant;\nol.transform.invert = _ol_transform$invert;\nol.transform.makeInverse = _ol_transform$makeInverse;\nol.transform.makeScale = _ol_transform$makeScale;\nol.transform.multiply = _ol_transform$multiply;\nol.transform.reset = _ol_transform$reset;\nol.transform.rotate = _ol_transform$rotate;\nol.transform.scale = _ol_transform$scale;\nol.transform.set = _ol_transform$set;\nol.transform.setFromArray = _ol_transform$setFromArray;\nol.transform.toString = _ol_transform$toString;\nol.transform.translate = _ol_transform$translate;\nol.uri = {};\nol.uri.appendParams = _ol_uri$appendParams;\nol.util = {};\nol.util.VERSION = _ol_util$VERSION;\nol.util.abstract = _ol_util$abstract;\nol.util.getUid = _ol_util$getUid;\nol.vec = {};\nol.vec.mat4 = {};\nol.vec.mat4.create = _ol_vec_mat4$create;\nol.vec.mat4.fromTransform = _ol_vec_mat4$fromTransform;\nol.webgl = {};\nol.webgl.ARRAY_BUFFER = _ol_webgl$ARRAY_BUFFER;\nol.webgl.BaseTileRepresentation = $ol$webgl$BaseTileRepresentation;\nol.webgl.Buffer = $ol$webgl$Buffer;\nol.webgl.Buffer.getArrayClassForType = _ol_webgl_Buffer$getArrayClassForType;\nol.webgl.DYNAMIC_DRAW = _ol_webgl$DYNAMIC_DRAW;\nol.webgl.ELEMENT_ARRAY_BUFFER = _ol_webgl$ELEMENT_ARRAY_BUFFER;\nol.webgl.FLOAT = _ol_webgl$FLOAT;\nol.webgl.Helper = $ol$webgl$Helper;\nol.webgl.Helper.computeAttributesStride = _ol_webgl_Helper$computeAttributesStride;\nol.webgl.PaletteTexture = $ol$webgl$PaletteTexture;\nol.webgl.PostProcessingPass = $ol$webgl$PostProcessingPass;\nol.webgl.RenderTarget = $ol$webgl$RenderTarget;\nol.webgl.STATIC_DRAW = _ol_webgl$STATIC_DRAW;\nol.webgl.STREAM_DRAW = _ol_webgl$STREAM_DRAW;\nol.webgl.ShaderBuilder = {};\nol.webgl.ShaderBuilder.ShaderBuilder = _ol_webgl_ShaderBuilder$ShaderBuilder;\nol.webgl.TileGeometry = $ol$webgl$TileGeometry;\nol.webgl.TileTexture = $ol$webgl$TileTexture;\nol.webgl.UNSIGNED_BYTE = _ol_webgl$UNSIGNED_BYTE;\nol.webgl.UNSIGNED_INT = _ol_webgl$UNSIGNED_INT;\nol.webgl.UNSIGNED_SHORT = _ol_webgl$UNSIGNED_SHORT;\nol.webgl.getContext = _ol_webgl$getContext;\nol.webgl.getSupportedExtensions = _ol_webgl$getSupportedExtensions;\nol.webgl.styleparser = {};\nol.webgl.styleparser.getSymbolOpacityGlslFunction = _ol_webgl_styleparser$getSymbolOpacityGlslFunction;\nol.webgl.styleparser.packColor = _ol_webgl_styleparser$packColor;\nol.webgl.styleparser.parseLiteralStyle = _ol_webgl_styleparser$parseLiteralStyle;\nol.xml = {};\nol.xml.OBJECT_PROPERTY_NODE_FACTORY = _ol_xml$OBJECT_PROPERTY_NODE_FACTORY;\nol.xml.XML_SCHEMA_INSTANCE_URI = _ol_xml$XML_SCHEMA_INSTANCE_URI;\nol.xml.createElementNS = _ol_xml$createElementNS;\nol.xml.getAllTextContent = _ol_xml$getAllTextContent;\nol.xml.getAllTextContent_ = _ol_xml$getAllTextContent_;\nol.xml.getAttributeNS = _ol_xml$getAttributeNS;\nol.xml.getDocument = _ol_xml$getDocument;\nol.xml.getXMLSerializer = _ol_xml$getXMLSerializer;\nol.xml.isDocument = _ol_xml$isDocument;\nol.xml.makeArrayExtender = _ol_xml$makeArrayExtender;\nol.xml.makeArrayPusher = _ol_xml$makeArrayPusher;\nol.xml.makeArraySerializer = _ol_xml$makeArraySerializer;\nol.xml.makeChildAppender = _ol_xml$makeChildAppender;\nol.xml.makeObjectPropertyPusher = _ol_xml$makeObjectPropertyPusher;\nol.xml.makeObjectPropertySetter = _ol_xml$makeObjectPropertySetter;\nol.xml.makeReplacer = _ol_xml$makeReplacer;\nol.xml.makeSequence = _ol_xml$makeSequence;\nol.xml.makeSimpleNodeFactory = _ol_xml$makeSimpleNodeFactory;\nol.xml.makeStructureNS = _ol_xml$makeStructureNS;\nol.xml.parse = _ol_xml$parse;\nol.xml.parseNode = _ol_xml$parseNode;\nol.xml.pushParseAndPop = _ol_xml$pushParseAndPop;\nol.xml.pushSerializeAndPop = _ol_xml$pushSerializeAndPop;\nol.xml.registerDocument = _ol_xml$registerDocument;\nol.xml.registerXMLSerializer = _ol_xml$registerXMLSerializer;\nol.xml.serialize = _ol_xml$serialize;\n\nexport default ol;","/**\n * @module ol/geom/flat/topology\n */\nimport {linearRing as linearRingArea} from './area.js';\n\n/**\n * Check if the linestring is a boundary.\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @return {boolean} The linestring is a boundary.\n */\nexport function lineStringIsClosed(flatCoordinates, offset, end, stride) {\n  const lastCoord = end - stride;\n  if (\n    flatCoordinates[offset] === flatCoordinates[lastCoord] &&\n    flatCoordinates[offset + 1] === flatCoordinates[lastCoord + 1] &&\n    (end - offset) / stride > 3\n  ) {\n    return !!linearRingArea(flatCoordinates, offset, end, stride);\n  }\n  return false;\n}\n","/**\n * @module ol/source\n */\n\nimport LRUCache from './structs/LRUCache.js';\nimport {getIntersection} from './extent.js';\n\nexport {default as BingMaps} from './source/BingMaps.js';\nexport {default as CartoDB} from './source/CartoDB.js';\nexport {default as Cluster} from './source/Cluster.js';\nexport {default as DataTile} from './source/DataTile.js';\nexport {default as GeoTIFF} from './source/GeoTIFF.js';\nexport {default as IIIF} from './source/IIIF.js';\nexport {default as Image} from './source/Image.js';\nexport {default as ImageArcGISRest} from './source/ImageArcGISRest.js';\nexport {default as ImageCanvas} from './source/ImageCanvas.js';\nexport {default as ImageMapGuide} from './source/ImageMapGuide.js';\nexport {default as ImageStatic} from './source/ImageStatic.js';\nexport {default as ImageWMS} from './source/ImageWMS.js';\nexport {default as OSM} from './source/OSM.js';\nexport {default as Raster} from './source/Raster.js';\nexport {default as Source} from './source/Source.js';\nexport {default as Stamen} from './source/Stamen.js';\nexport {default as Tile} from './source/Tile.js';\nexport {default as TileArcGISRest} from './source/TileArcGISRest.js';\nexport {default as TileDebug} from './source/TileDebug.js';\nexport {default as TileImage} from './source/TileImage.js';\nexport {default as TileJSON} from './source/TileJSON.js';\nexport {default as TileWMS} from './source/TileWMS.js';\nexport {default as UrlTile} from './source/UrlTile.js';\nexport {default as UTFGrid} from './source/UTFGrid.js';\nexport {default as Vector} from './source/Vector.js';\nexport {default as VectorTile} from './source/VectorTile.js';\nexport {default as WMTS} from './source/WMTS.js';\nexport {default as XYZ} from './source/XYZ.js';\nexport {default as Zoomify} from './source/Zoomify.js';\n\n/**\n * Creates a sources function from a tile grid. This function can be used as value for the\n * `sources` property of the {@link module:ol/layer/Layer~Layer} subclasses that support it.\n * @param {import(\"./tilegrid/TileGrid.js\").default} tileGrid Tile grid.\n * @param {function(import(\"./tilecoord.js\").TileCoord): import(\"./source/Source.js\").default} factory Source factory.\n * This function takes a {@link module:ol/tilecoord~TileCoord} as argument and is expected to return a\n * {@link module:ol/source/Source~Source}. **Note**: The returned sources should have a tile grid with\n * a limited set of resolutions, matching the resolution range of a single zoom level of the pyramid\n * `tileGrid` that `sourcesFromTileGrid` was called with.\n * @return {function(import(\"./extent.js\").Extent, number): Array<import(\"./source/Source.js\").default>} Sources function.\n * @api\n */\nexport function sourcesFromTileGrid(tileGrid, factory) {\n  const sourceCache = new LRUCache(32);\n  const tileGridExtent = tileGrid.getExtent();\n  return function (extent, resolution) {\n    sourceCache.expireCache();\n    if (tileGridExtent) {\n      extent = getIntersection(tileGridExtent, extent);\n    }\n    const z = tileGrid.getZForResolution(resolution);\n    const wantedSources = [];\n    tileGrid.forEachTileCoord(extent, z, (tileCoord) => {\n      const key = tileCoord.toString();\n      if (!sourceCache.containsKey(key)) {\n        const source = factory(tileCoord);\n        sourceCache.set(key, source);\n      }\n      wantedSources.push(sourceCache.get(key));\n    });\n    return wantedSources;\n  };\n}\n"],"names":["messages","AssertionError","Error","constructor","code","message","super","this","name","$ol$AssertionError","stopPropagation","evt","$ol$events$Event","type","propagationStopped","defaultPrevented","target","preventDefault","ObjectEventType","$ol$Disposable","disposed","dispose","disposeInternal","binarySearch","haystack","needle","comparator","mid","cmp","ascending","low","high","length","found","a","b","linearFindNearest","arr","direction","n","i","candidate","reverseSubArray","begin","end","tmp","extend","data","extension","Array","isArray","equals","arr1","arr2","len1","isSorted","func","strict","compare","every","currentVal","index","res","TRUE","FALSE","VOID","memoizeOne","fn","lastResult","lastArgs","lastThis","called","nextArgs","prototype","slice","call","arguments","arrayEquals","apply","toPromise","getter","value","err","Promise","reject","resolve","promiseGetter","clear","object","property","isEmpty","$ol$events$Target","Disposable","eventTarget_","pendingRemovals_","dispatching_","listeners_","addEventListener","listener","listeners","listenersForType","includes","push","dispatchEvent","event","isString","Event","dispatching","pendingRemovals","propagate","ii","handleEvent","pr","removeEventListener","getListeners","undefined","hasListener","Object","keys","indexOf","splice","EventType$1","CHANGE","ERROR","BLUR","CLEAR","CONTEXTMENU","CLICK","DBLCLICK","DRAGENTER","DRAGOVER","DROP","FOCUS","KEYDOWN","KEYPRESS","LOAD","RESIZE","TOUCHMOVE","WHEEL","listen","thisArg","once","bind","originalListener","eventsKey","listenOnce","unlistenByKey","key","Observable","EventTarget","on","un","revision_","changed","EventType","getRevision","onInternal","len","onceInternal","ol_key","unInternal","unByKey","$ol$Observable","abstract","uidCounter_","getUid","obj","ol_uid","String","ObjectEvent","oldValue","$ol$Object","values","values_","setProperties","get","hasOwnProperty","getKeys","getProperties","assign","hasProperties","notify","eventType","addChangeListener","removeChangeListener","set","silent","applyProperties","source","unset","CollectionEventType","Property","CollectionEvent","element","Collection","BaseObject","array","options","unique_","unique","array_","assertUnique_","updateLength_","getLength","pop","forEach","f","getArray","item","insertAt","elem","removeAt","remove","prev","setAt","except","TileState","easeIn","t","Math","pow","easeOut","inAndOut","linear","$ol$Tile","tileCoord","state","interimTile","transition_","transition","transitionStarts_","interpolate","release","setState","getKey","getInterimTile","tile","getState","refreshInterimChain","getTileCoord","load","getAlpha","id","time","start","delta","inTransition","endTransition","ua","navigator","userAgent","toLowerCase","FIREFOX","SAFARI","SAFARI_BUG_237906","test","WEBKIT","MAC","DEVICE_PIXEL_RATIO","devicePixelRatio","WORKER_OFFSCREEN_CANVAS","WorkerGlobalScope","OffscreenCanvas","self","IMAGE_DECODE","Image","decode","PASSIVE_EVENT_LISTENERS","passive","defineProperty","window","error","createCanvasContext2D","width","height","canvasPool","settings","canvas","shift","document","createElement","getContext","releaseCanvas","context","clearRect","outerWidth","offsetWidth","style","getComputedStyle","parseInt","marginLeft","marginRight","outerHeight","offsetHeight","marginTop","marginBottom","replaceNode","newNode","oldNode","parent","parentNode","replaceChild","removeNode","node","removeChild","removeChildren","lastChild","replaceChildren","children","oldChildren","childNodes","oldChild","newChild","insertBefore","appendChild","asImageLike","HTMLCanvasElement","HTMLVideoElement","asArrayLike","Uint8Array","Uint8ClampedArray","Float32Array","DataView","sharedContext","toArray","image","willReadFrequently","drawImage","getImageData","defaultSize","$ol$DataTile","Tile","loader_","loader","data_","error_","size_","size","getSize","imageData","getData","getError","then","catch","assert","assertion","errorCode","Feature","geometryOrProperties","id_","geometryName_","style_","styleFunction_","geometryChangeKey_","handleGeometryChanged_","geometry","setGeometry","properties","clone","setGeometryName","getGeometryName","getGeometry","getStyle","setStyle","getId","getStyleFunction","handleGeometryChange_","createStyleFunction","setId","styles","$ol$Feature","tmp_","create","reset","transform","multiply","transform1","transform2","a1","b1","c1","d1","e1","f1","a2","b2","c2","d2","e2","f2","c","d","e","setFromArray","coordinate","x","y","rotate","angle","cos","sin","scale","makeScale","translate","dx","dy","compose","dx1","dy1","sx","sy","dx2","dy2","makeInverse","det","determinant","mat","transformStringDiv","toString","transformString","join","Relationship","UNKNOWN","INTERSECTING","ABOVE","RIGHT","BELOW","LEFT","boundingExtent","coordinates","extent","createEmpty","extendCoordinate","buffer","dest","closestSquaredDistanceXY","containsCoordinate","containsXY","containsExtent","extent1","extent2","coordinateRelationship","mi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