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__extends = (this && this.__extends) || (function () {\n    var extendStatics = function (d, b) {\n        extendStatics = Object.setPrototypeOf ||\n            ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\n            function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };\n        return extendStatics(d, b);\n    };\n    return function (d, b) {\n        if (typeof b !== \"function\" && b !== null)\n            throw new TypeError(\"Class extends value \" + String(b) + \" is not a constructor or null\");\n        extendStatics(d, b);\n        function __() { this.constructor = d; }\n        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\n    };\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 { assign } from '../obj.js';\nimport { clamp } from '../math.js';\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 * @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 * @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 * @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 * @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 */\nvar BaseLayer = /** @class */ (function (_super) {\n    __extends(BaseLayer, _super);\n    /**\n     * @param {Options} options Layer options.\n     */\n    function BaseLayer(options) {\n        var _this = _super.call(this) || this;\n        /***\n         * @type {BaseLayerOnSignature<import(\"../events\").EventsKey>}\n         */\n        _this.on;\n        /***\n         * @type {BaseLayerOnSignature<import(\"../events\").EventsKey>}\n         */\n        _this.once;\n        /***\n         * @type {BaseLayerOnSignature<void>}\n         */\n        _this.un;\n        /**\n         * @type {BackgroundColor|false}\n         * @private\n         */\n        _this.background_ = options.background;\n        /**\n         * @type {Object<string, *>}\n         */\n        var properties = assign({}, options);\n        if (typeof options.properties === 'object') {\n            delete properties.properties;\n            assign(properties, options.properties);\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        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         * @type {string}\n         * @private\n         */\n        _this.className_ =\n            properties.className !== undefined ? properties.className : 'ol-layer';\n        delete properties.className;\n        _this.setProperties(properties);\n        /**\n         * @type {import(\"./Layer.js\").State}\n         * @private\n         */\n        _this.state_ = null;\n        return _this;\n    }\n    /**\n     * Get the background for this layer.\n     * @return {BackgroundColor|false} Layer background.\n     */\n    BaseLayer.prototype.getBackground = function () {\n        return this.background_;\n    };\n    /**\n     * @return {string} CSS class name.\n     */\n    BaseLayer.prototype.getClassName = function () {\n        return this.className_;\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} [opt_managed] Layer is managed.\n     * @return {import(\"./Layer.js\").State} Layer state.\n     */\n    BaseLayer.prototype.getLayerState = function (opt_managed) {\n        /** @type {import(\"./Layer.js\").State} */\n        var state = this.state_ ||\n            /** @type {?} */ ({\n                layer: this,\n                managed: opt_managed === undefined ? true : opt_managed,\n            });\n        var 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        return state;\n    };\n    /**\n     * @abstract\n     * @param {Array<import(\"./Layer.js\").default>} [opt_array] Array of layers (to be\n     *     modified in place).\n     * @return {Array<import(\"./Layer.js\").default>} Array of layers.\n     */\n    BaseLayer.prototype.getLayersArray = function (opt_array) {\n        return abstract();\n    };\n    /**\n     * @abstract\n     * @param {Array<import(\"./Layer.js\").State>} [opt_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    BaseLayer.prototype.getLayerStatesArray = function (opt_states) {\n        return abstract();\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    BaseLayer.prototype.getExtent = function () {\n        return /** @type {import(\"../extent.js\").Extent|undefined} */ (this.get(LayerProperty.EXTENT));\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    BaseLayer.prototype.getMaxResolution = function () {\n        return /** @type {number} */ (this.get(LayerProperty.MAX_RESOLUTION));\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    BaseLayer.prototype.getMinResolution = function () {\n        return /** @type {number} */ (this.get(LayerProperty.MIN_RESOLUTION));\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    BaseLayer.prototype.getMinZoom = function () {\n        return /** @type {number} */ (this.get(LayerProperty.MIN_ZOOM));\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    BaseLayer.prototype.getMaxZoom = function () {\n        return /** @type {number} */ (this.get(LayerProperty.MAX_ZOOM));\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    BaseLayer.prototype.getOpacity = function () {\n        return /** @type {number} */ (this.get(LayerProperty.OPACITY));\n    };\n    /**\n     * @abstract\n     * @return {import(\"../source/Source.js\").State} Source state.\n     */\n    BaseLayer.prototype.getSourceState = function () {\n        return abstract();\n    };\n    /**\n     * Return the visibility of the layer (`true` or `false`).\n     * @return {boolean} The visibility of the layer.\n     * @observable\n     * @api\n     */\n    BaseLayer.prototype.getVisible = function () {\n        return /** @type {boolean} */ (this.get(LayerProperty.VISIBLE));\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    BaseLayer.prototype.getZIndex = function () {\n        return /** @type {number} */ (this.get(LayerProperty.Z_INDEX));\n    };\n    /**\n     * Sets the background color.\n     * @param {BackgroundColor} [opt_background] Background color.\n     */\n    BaseLayer.prototype.setBackground = function (opt_background) {\n        this.background_ = opt_background;\n        this.changed();\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    BaseLayer.prototype.setExtent = function (extent) {\n        this.set(LayerProperty.EXTENT, extent);\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    BaseLayer.prototype.setMaxResolution = function (maxResolution) {\n        this.set(LayerProperty.MAX_RESOLUTION, maxResolution);\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    BaseLayer.prototype.setMinResolution = function (minResolution) {\n        this.set(LayerProperty.MIN_RESOLUTION, minResolution);\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    BaseLayer.prototype.setMaxZoom = function (maxZoom) {\n        this.set(LayerProperty.MAX_ZOOM, maxZoom);\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    BaseLayer.prototype.setMinZoom = function (minZoom) {\n        this.set(LayerProperty.MIN_ZOOM, minZoom);\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    BaseLayer.prototype.setOpacity = function (opacity) {\n        assert(typeof opacity === 'number', 64); // Layer opacity must be a number\n        this.set(LayerProperty.OPACITY, opacity);\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    BaseLayer.prototype.setVisible = function (visible) {\n        this.set(LayerProperty.VISIBLE, visible);\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    BaseLayer.prototype.setZIndex = function (zindex) {\n        this.set(LayerProperty.Z_INDEX, zindex);\n    };\n    /**\n     * Clean up.\n     */\n    BaseLayer.prototype.disposeInternal = function () {\n        if (this.state_) {\n            this.state_.layer = null;\n            this.state_ = null;\n        }\n        _super.prototype.disposeInternal.call(this);\n    };\n    return BaseLayer;\n}(BaseObject));\nexport default BaseLayer;\n//# sourceMappingURL=Base.js.map","var __extends = (this && this.__extends) || (function () {\n    var extendStatics = function (d, b) {\n        extendStatics = Object.setPrototypeOf ||\n            ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\n            function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };\n        return extendStatics(d, b);\n    };\n    return function (d, b) {\n        if (typeof b !== \"function\" && b !== null)\n            throw new TypeError(\"Class extends value \" + String(b) + \" is not a constructor or null\");\n        extendStatics(d, b);\n        function __() { this.constructor = d; }\n        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\n    };\n})();\n/**\n * @module ol/layer/BaseTile\n */\nimport Layer from './Layer.js';\nimport TileProperty from './TileProperty.js';\nimport { assign } from '../obj.js';\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:source'|'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 *   'change:source'|'change:preload'|'change:useInterimTilesOnError'|import(\"../render/EventType\").LayerRenderEventTypes, Return>} BaseTileLayerOnSignature\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(\"../PluggableMap.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(\"../PluggableMap.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 * @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 */\nvar BaseTileLayer = /** @class */ (function (_super) {\n    __extends(BaseTileLayer, _super);\n    /**\n     * @param {Options<TileSourceType>} [opt_options] Tile layer options.\n     */\n    function BaseTileLayer(opt_options) {\n        var _this = this;\n        var options = opt_options ? opt_options : {};\n        var baseOptions = assign({}, options);\n        delete baseOptions.preload;\n        delete baseOptions.useInterimTilesOnError;\n        _this = _super.call(this, baseOptions) || this;\n        /***\n         * @type {BaseTileLayerOnSignature<import(\"../events\").EventsKey>}\n         */\n        _this.on;\n        /***\n         * @type {BaseTileLayerOnSignature<import(\"../events\").EventsKey>}\n         */\n        _this.once;\n        /***\n         * @type {BaseTileLayerOnSignature<void>}\n         */\n        _this.un;\n        _this.setPreload(options.preload !== undefined ? options.preload : 0);\n        _this.setUseInterimTilesOnError(options.useInterimTilesOnError !== undefined\n            ? options.useInterimTilesOnError\n            : true);\n        return _this;\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    BaseTileLayer.prototype.getPreload = function () {\n        return /** @type {number} */ (this.get(TileProperty.PRELOAD));\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    BaseTileLayer.prototype.setPreload = function (preload) {\n        this.set(TileProperty.PRELOAD, preload);\n    };\n    /**\n     * Whether we use interim tiles on error.\n     * @return {boolean} Use interim tiles on error.\n     * @observable\n     * @api\n     */\n    BaseTileLayer.prototype.getUseInterimTilesOnError = function () {\n        return /** @type {boolean} */ (this.get(TileProperty.USE_INTERIM_TILES_ON_ERROR));\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    BaseTileLayer.prototype.setUseInterimTilesOnError = function (useInterimTilesOnError) {\n        this.set(TileProperty.USE_INTERIM_TILES_ON_ERROR, useInterimTilesOnError);\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    BaseTileLayer.prototype.getData = function (pixel) {\n        return _super.prototype.getData.call(this, pixel);\n    };\n    return BaseTileLayer;\n}(Layer));\nexport default BaseTileLayer;\n//# sourceMappingURL=BaseTile.js.map","var __extends = (this && this.__extends) || (function () {\n    var extendStatics = function (d, b) {\n        extendStatics = Object.setPrototypeOf ||\n            ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\n            function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };\n        return extendStatics(d, b);\n    };\n    return function (d, b) {\n        if (typeof b !== \"function\" && b !== null)\n            throw new TypeError(\"Class extends value \" + String(b) + \" is not a constructor or null\");\n        extendStatics(d, b);\n        function __() { this.constructor = d; }\n        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\n    };\n})();\n/**\n * @module ol/layer/BaseVector\n */\nimport Layer from './Layer.js';\nimport RBush from 'rbush';\nimport { assign } from '../obj.js';\nimport { createDefaultStyle, toFunction as toStyleFunction, } from '../style/Style.js';\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(\"../PluggableMap.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(\"../PluggableMap.js\").default#addLayer map.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} [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 * @enum {string}\n * @private\n */\nvar Property = {\n    RENDER_ORDER: 'renderOrder',\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 */\nvar BaseVectorLayer = /** @class */ (function (_super) {\n    __extends(BaseVectorLayer, _super);\n    /**\n     * @param {Options<VectorSourceType>} [opt_options] Options.\n     */\n    function BaseVectorLayer(opt_options) {\n        var _this = this;\n        var options = opt_options ? opt_options : {};\n        var baseOptions = assign({}, options);\n        delete baseOptions.style;\n        delete baseOptions.renderBuffer;\n        delete baseOptions.updateWhileAnimating;\n        delete baseOptions.updateWhileInteracting;\n        _this = _super.call(this, baseOptions) || this;\n        /**\n         * @private\n         * @type {boolean}\n         */\n        _this.declutter_ =\n            options.declutter !== undefined ? options.declutter : false;\n        /**\n         * @type {number}\n         * @private\n         */\n        _this.renderBuffer_ =\n            options.renderBuffer !== undefined ? options.renderBuffer : 100;\n        /**\n         * User provided style.\n         * @type {import(\"../style/Style.js\").StyleLike}\n         * @private\n         */\n        _this.style_ = null;\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        _this.setStyle(options.style);\n        /**\n         * @type {boolean}\n         * @private\n         */\n        _this.updateWhileAnimating_ =\n            options.updateWhileAnimating !== undefined\n                ? options.updateWhileAnimating\n                : false;\n        /**\n         * @type {boolean}\n         * @private\n         */\n        _this.updateWhileInteracting_ =\n            options.updateWhileInteracting !== undefined\n                ? options.updateWhileInteracting\n                : false;\n        return _this;\n    }\n    /**\n     * @return {boolean} Declutter.\n     */\n    BaseVectorLayer.prototype.getDeclutter = function () {\n        return this.declutter_;\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 {@link import(\"../PluggableMap.js\").default#getFeaturesAtPixel}: Text\n     * 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\").default>>} Promise that resolves with an array of features.\n     * @api\n     */\n    BaseVectorLayer.prototype.getFeatures = function (pixel) {\n        return _super.prototype.getFeatures.call(this, pixel);\n    };\n    /**\n     * @return {number|undefined} Render buffer.\n     */\n    BaseVectorLayer.prototype.getRenderBuffer = function () {\n        return this.renderBuffer_;\n    };\n    /**\n     * @return {function(import(\"../Feature.js\").default, import(\"../Feature.js\").default): number|null|undefined} Render\n     *     order.\n     */\n    BaseVectorLayer.prototype.getRenderOrder = function () {\n        return /** @type {import(\"../render.js\").OrderFunction|null|undefined} */ (this.get(Property.RENDER_ORDER));\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    BaseVectorLayer.prototype.getStyle = function () {\n        return this.style_;\n    };\n    /**\n     * Get the style function.\n     * @return {import(\"../style/Style.js\").StyleFunction|undefined} Layer style function.\n     * @api\n     */\n    BaseVectorLayer.prototype.getStyleFunction = function () {\n        return this.styleFunction_;\n    };\n    /**\n     * @return {boolean} Whether the rendered layer should be updated while\n     *     animating.\n     */\n    BaseVectorLayer.prototype.getUpdateWhileAnimating = function () {\n        return this.updateWhileAnimating_;\n    };\n    /**\n     * @return {boolean} Whether the rendered layer should be updated while\n     *     interacting.\n     */\n    BaseVectorLayer.prototype.getUpdateWhileInteracting = function () {\n        return this.updateWhileInteracting_;\n    };\n    /**\n     * Render declutter items for this layer\n     * @param {import(\"../PluggableMap.js\").FrameState} frameState Frame state.\n     */\n    BaseVectorLayer.prototype.renderDeclutter = function (frameState) {\n        if (!frameState.declutterTree) {\n            frameState.declutterTree = new RBush(9);\n        }\n        /** @type {*} */ (this.getRenderer()).renderDeclutter(frameState);\n    };\n    /**\n     * @param {import(\"../render.js\").OrderFunction|null|undefined} renderOrder\n     *     Render order.\n     */\n    BaseVectorLayer.prototype.setRenderOrder = function (renderOrder) {\n        this.set(Property.RENDER_ORDER, renderOrder);\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     * {@link module:ol/style/Style~Style} for information on the default style.\n     * @param {import(\"../style/Style.js\").StyleLike|null} [opt_style] Layer style.\n     * @api\n     */\n    BaseVectorLayer.prototype.setStyle = function (opt_style) {\n        this.style_ = opt_style !== undefined ? opt_style : createDefaultStyle;\n        this.styleFunction_ =\n            opt_style === null ? undefined : toStyleFunction(this.style_);\n        this.changed();\n    };\n    return BaseVectorLayer;\n}(Layer));\nexport default BaseVectorLayer;\n//# sourceMappingURL=BaseVector.js.map","var __extends = (this && this.__extends) || (function () {\n    var extendStatics = function (d, b) {\n        extendStatics = Object.setPrototypeOf ||\n            ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\n            function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };\n        return extendStatics(d, b);\n    };\n    return function (d, b) {\n        if (typeof b !== \"function\" && b !== null)\n            throw new TypeError(\"Class extends value \" + String(b) + \" is not a constructor or null\");\n        extendStatics(d, b);\n        function __() { this.constructor = d; }\n        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\n    };\n})();\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 { assign, clear } from '../obj.js';\nimport { getIntersection } from '../extent.js';\nimport { getUid } from '../util.js';\nimport { listen, unlistenByKey } from '../events.js';\n/**\n * @typedef {'addlayer'|'removelayer'} EventType\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 */\nvar GroupEvent = /** @class */ (function (_super) {\n    __extends(GroupEvent, _super);\n    /**\n     * @param {EventType} type The event type.\n     * @param {BaseLayer} layer The layer.\n     */\n    function GroupEvent(type, layer) {\n        var _this = _super.call(this, type) || this;\n        /**\n         * The added or removed layer.\n         * @type {BaseLayer}\n         * @api\n         */\n        _this.layer = layer;\n        return _this;\n    }\n    return GroupEvent;\n}(Event));\nexport { GroupEvent };\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 * @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>|import(\"../Collection.js\").default<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 * @enum {string}\n * @private\n */\nvar Property = {\n    LAYERS: 'layers',\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 */\nvar LayerGroup = /** @class */ (function (_super) {\n    __extends(LayerGroup, _super);\n    /**\n     * @param {Options} [opt_options] Layer options.\n     */\n    function LayerGroup(opt_options) {\n        var _this = this;\n        var options = opt_options || {};\n        var baseOptions = /** @type {Options} */ (assign({}, options));\n        delete baseOptions.layers;\n        var layers = options.layers;\n        _this = _super.call(this, baseOptions) || this;\n        /***\n         * @type {GroupOnSignature<import(\"../events\").EventsKey>}\n         */\n        _this.on;\n        /***\n         * @type {GroupOnSignature<import(\"../events\").EventsKey>}\n         */\n        _this.once;\n        /***\n         * @type {GroupOnSignature<void>}\n         */\n        _this.un;\n        /**\n         * @private\n         * @type {Array<import(\"../events.js\").EventsKey>}\n         */\n        _this.layersListenerKeys_ = [];\n        /**\n         * @private\n         * @type {Object<string, Array<import(\"../events.js\").EventsKey>>}\n         */\n        _this.listenerKeys_ = {};\n        _this.addChangeListener(Property.LAYERS, _this.handleLayersChanged_);\n        if (layers) {\n            if (Array.isArray(layers)) {\n                layers = new Collection(layers.slice(), { unique: true });\n            }\n            else {\n                assert(typeof ( /** @type {?} */(layers).getArray) === 'function', 43); // Expected `layers` to be an array or a `Collection`\n            }\n        }\n        else {\n            layers = new Collection(undefined, { unique: true });\n        }\n        _this.setLayers(layers);\n        return _this;\n    }\n    /**\n     * @private\n     */\n    LayerGroup.prototype.handleLayerChange_ = function () {\n        this.changed();\n    };\n    /**\n     * @private\n     */\n    LayerGroup.prototype.handleLayersChanged_ = function () {\n        this.layersListenerKeys_.forEach(unlistenByKey);\n        this.layersListenerKeys_.length = 0;\n        var layers = this.getLayers();\n        this.layersListenerKeys_.push(listen(layers, CollectionEventType.ADD, this.handleLayersAdd_, this), listen(layers, CollectionEventType.REMOVE, this.handleLayersRemove_, this));\n        for (var id in this.listenerKeys_) {\n            this.listenerKeys_[id].forEach(unlistenByKey);\n        }\n        clear(this.listenerKeys_);\n        var layersArray = layers.getArray();\n        for (var i = 0, ii = layersArray.length; i < ii; i++) {\n            var layer = layersArray[i];\n            this.registerLayerListeners_(layer);\n            this.dispatchEvent(new GroupEvent('addlayer', layer));\n        }\n        this.changed();\n    };\n    /**\n     * @param {BaseLayer} layer The layer.\n     */\n    LayerGroup.prototype.registerLayerListeners_ = function (layer) {\n        var listenerKeys = [\n            listen(layer, ObjectEventType.PROPERTYCHANGE, this.handleLayerChange_, this),\n            listen(layer, EventType.CHANGE, this.handleLayerChange_, this),\n        ];\n        if (layer instanceof LayerGroup) {\n            listenerKeys.push(listen(layer, 'addlayer', this.handleLayerGroupAdd_, this), listen(layer, 'removelayer', this.handleLayerGroupRemove_, this));\n        }\n        this.listenerKeys_[getUid(layer)] = listenerKeys;\n    };\n    /**\n     * @param {GroupEvent} event The layer group event.\n     */\n    LayerGroup.prototype.handleLayerGroupAdd_ = function (event) {\n        this.dispatchEvent(new GroupEvent('addlayer', event.layer));\n    };\n    /**\n     * @param {GroupEvent} event The layer group event.\n     */\n    LayerGroup.prototype.handleLayerGroupRemove_ = function (event) {\n        this.dispatchEvent(new GroupEvent('removelayer', event.layer));\n    };\n    /**\n     * @param {import(\"../Collection.js\").CollectionEvent} collectionEvent CollectionEvent.\n     * @private\n     */\n    LayerGroup.prototype.handleLayersAdd_ = function (collectionEvent) {\n        var layer = /** @type {import(\"./Base.js\").default} */ (collectionEvent.element);\n        this.registerLayerListeners_(layer);\n        this.dispatchEvent(new GroupEvent('addlayer', layer));\n        this.changed();\n    };\n    /**\n     * @param {import(\"../Collection.js\").CollectionEvent} collectionEvent CollectionEvent.\n     * @private\n     */\n    LayerGroup.prototype.handleLayersRemove_ = function (collectionEvent) {\n        var layer = /** @type {import(\"./Base.js\").default} */ (collectionEvent.element);\n        var 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     * Returns the {@link module:ol/Collection~Collection collection} of {@link module:ol/layer/Layer~Layer layers}\n     * in this group.\n     * @return {!import(\"../Collection.js\").default<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    LayerGroup.prototype.getLayers = function () {\n        return /** @type {!import(\"../Collection.js\").default<import(\"./Base.js\").default>} */ (this.get(Property.LAYERS));\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 {!import(\"../Collection.js\").default<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    LayerGroup.prototype.setLayers = function (layers) {\n        var collection = this.getLayers();\n        if (collection) {\n            var currentLayers = collection.getArray();\n            for (var i = 0, ii = currentLayers.length; i < ii; ++i) {\n                this.dispatchEvent(new GroupEvent('removelayer', currentLayers[i]));\n            }\n        }\n        this.set(Property.LAYERS, layers);\n    };\n    /**\n     * @param {Array<import(\"./Layer.js\").default>} [opt_array] Array of layers (to be modified in place).\n     * @return {Array<import(\"./Layer.js\").default>} Array of layers.\n     */\n    LayerGroup.prototype.getLayersArray = function (opt_array) {\n        var array = opt_array !== undefined ? opt_array : [];\n        this.getLayers().forEach(function (layer) {\n            layer.getLayersArray(array);\n        });\n        return array;\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 opt_states 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>} [opt_states] Optional list\n     * of layer states (to be modified in place).\n     * @return {Array<import(\"./Layer.js\").State>} List of layer states.\n     */\n    LayerGroup.prototype.getLayerStatesArray = function (opt_states) {\n        var states = opt_states !== undefined ? opt_states : [];\n        var pos = states.length;\n        this.getLayers().forEach(function (layer) {\n            layer.getLayerStatesArray(states);\n        });\n        var ownLayerState = this.getLayerState();\n        var defaultZIndex = ownLayerState.zIndex;\n        if (!opt_states && ownLayerState.zIndex === undefined) {\n            defaultZIndex = 0;\n        }\n        for (var i = pos, ii = states.length; i < ii; i++) {\n            var layerState = states[i];\n            layerState.opacity *= ownLayerState.opacity;\n            layerState.visible = layerState.visible && ownLayerState.visible;\n            layerState.maxResolution = Math.min(layerState.maxResolution, ownLayerState.maxResolution);\n            layerState.minResolution = Math.max(layerState.minResolution, ownLayerState.minResolution);\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(layerState.extent, ownLayerState.extent);\n                }\n                else {\n                    layerState.extent = ownLayerState.extent;\n                }\n            }\n            if (layerState.zIndex === undefined) {\n                layerState.zIndex = defaultZIndex;\n            }\n        }\n        return states;\n    };\n    /**\n     * @return {import(\"../source/Source.js\").State} Source state.\n     */\n    LayerGroup.prototype.getSourceState = function () {\n        return 'ready';\n    };\n    return LayerGroup;\n}(BaseLayer));\nexport default LayerGroup;\n//# sourceMappingURL=Group.js.map","var __extends = (this && this.__extends) || (function () {\n    var extendStatics = function (d, b) {\n        extendStatics = Object.setPrototypeOf ||\n            ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\n            function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };\n        return extendStatics(d, b);\n    };\n    return function (d, b) {\n        if (typeof b !== \"function\" && b !== null)\n            throw new TypeError(\"Class extends value \" + String(b) + \" is not a constructor or null\");\n        extendStatics(d, b);\n        function __() { this.constructor = d; }\n        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\n    };\n})();\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 { assert } from '../asserts.js';\nimport { assign } from '../obj.js';\nimport { listen, unlistenByKey } from '../events.js';\n/**\n * @typedef {function(import(\"../PluggableMap.js\").FrameState):HTMLElement} RenderFunction\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:source', 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|'change:source'|\n *     import(\"../render/EventType\").LayerRenderEventTypes, Return>} LayerOnSignature\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(\"../PluggableMap.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 * @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 * @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 {@link import(\"../PluggableMap.js\").default#addLayer map.addLayer()}. Components\n * like {@link module:ol/interaction/Draw~Draw} use unmanaged layers\n * internally. These unmanaged layers are associated with the map using\n * {@link module:ol/layer/Layer~Layer#setMap} instead.\n *\n * A generic `change` event is fired when the state of the source changes.\n *\n * Please note that for performance reasons several layers might get rendered to\n * the same HTML element, which will cause {@link import(\"../PluggableMap.js\").default#forEachLayerAtPixel map.forEachLayerAtPixel()} to\n * give false positives. To avoid this, apply different `className` properties to the\n * layers at creation time.\n *\n * @fires import(\"../render/Event.js\").RenderEvent#prerender\n * @fires import(\"../render/Event.js\").RenderEvent#postrender\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 */\nvar Layer = /** @class */ (function (_super) {\n    __extends(Layer, _super);\n    /**\n     * @param {Options<SourceType>} options Layer options.\n     */\n    function Layer(options) {\n        var _this = this;\n        var baseOptions = assign({}, options);\n        delete baseOptions.source;\n        _this = _super.call(this, baseOptions) || this;\n        /***\n         * @type {LayerOnSignature<import(\"../events\").EventsKey>}\n         */\n        _this.on;\n        /***\n         * @type {LayerOnSignature<import(\"../events\").EventsKey>}\n         */\n        _this.once;\n        /***\n         * @type {LayerOnSignature<void>}\n         */\n        _this.un;\n        /**\n         * @private\n         * @type {?import(\"../events.js\").EventsKey}\n         */\n        _this.mapPrecomposeKey_ = null;\n        /**\n         * @private\n         * @type {?import(\"../events.js\").EventsKey}\n         */\n        _this.mapRenderKey_ = null;\n        /**\n         * @private\n         * @type {?import(\"../events.js\").EventsKey}\n         */\n        _this.sourceChangeKey_ = null;\n        /**\n         * @private\n         * @type {RendererType}\n         */\n        _this.renderer_ = null;\n        /**\n         * @protected\n         * @type {boolean}\n         */\n        _this.rendered = false;\n        // Overwrite default render method with a custom one\n        if (options.render) {\n            _this.render = options.render;\n        }\n        if (options.map) {\n            _this.setMap(options.map);\n        }\n        _this.addChangeListener(LayerProperty.SOURCE, _this.handleSourcePropertyChange_);\n        var source = options.source\n            ? /** @type {SourceType} */ (options.source)\n            : null;\n        _this.setSource(source);\n        return _this;\n    }\n    /**\n     * @param {Array<import(\"./Layer.js\").default>} [opt_array] Array of layers (to be modified in place).\n     * @return {Array<import(\"./Layer.js\").default>} Array of layers.\n     */\n    Layer.prototype.getLayersArray = function (opt_array) {\n        var array = opt_array ? opt_array : [];\n        array.push(this);\n        return array;\n    };\n    /**\n     * @param {Array<import(\"./Layer.js\").State>} [opt_states] Optional list of layer states (to be modified in place).\n     * @return {Array<import(\"./Layer.js\").State>} List of layer states.\n     */\n    Layer.prototype.getLayerStatesArray = function (opt_states) {\n        var states = opt_states ? opt_states : [];\n        states.push(this.getLayerState());\n        return states;\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    Layer.prototype.getSource = function () {\n        return /** @type {SourceType} */ (this.get(LayerProperty.SOURCE)) || null;\n    };\n    /**\n     * @return {SourceType|null} The source being rendered.\n     */\n    Layer.prototype.getRenderSource = function () {\n        return this.getSource();\n    };\n    /**\n     * @return {import(\"../source/Source.js\").State} Source state.\n     */\n    Layer.prototype.getSourceState = function () {\n        var source = this.getSource();\n        return !source ? 'undefined' : source.getState();\n    };\n    /**\n     * @private\n     */\n    Layer.prototype.handleSourceChange_ = function () {\n        this.changed();\n    };\n    /**\n     * @private\n     */\n    Layer.prototype.handleSourcePropertyChange_ = function () {\n        if (this.sourceChangeKey_) {\n            unlistenByKey(this.sourceChangeKey_);\n            this.sourceChangeKey_ = null;\n        }\n        var source = this.getSource();\n        if (source) {\n            this.sourceChangeKey_ = listen(source, EventType.CHANGE, this.handleSourceChange_, this);\n        }\n        this.changed();\n    };\n    /**\n     * @param {import(\"../pixel\").Pixel} pixel Pixel.\n     * @return {Promise<Array<import(\"../Feature\").default>>} Promise that resolves with\n     * an array of features.\n     */\n    Layer.prototype.getFeatures = function (pixel) {\n        if (!this.renderer_) {\n            return new Promise(function (resolve) { return resolve([]); });\n        }\n        return this.renderer_.getFeatures(pixel);\n    };\n    /**\n     * @param {import(\"../pixel\").Pixel} pixel Pixel.\n     * @return {Uint8ClampedArray|Uint8Array|Float32Array|DataView|null} Pixel data.\n     */\n    Layer.prototype.getData = function (pixel) {\n        if (!this.renderer_ || !this.rendered) {\n            return null;\n        }\n        return this.renderer_.getData(pixel);\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(\"../PluggableMap.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    Layer.prototype.render = function (frameState, target) {\n        var layerRenderer = this.getRenderer();\n        if (layerRenderer.prepareFrame(frameState)) {\n            this.rendered = true;\n            return layerRenderer.renderFrame(frameState, target);\n        }\n    };\n    /**\n     * Called when a layer is not visible during a map render.\n     */\n    Layer.prototype.unrender = function () {\n        this.rendered = false;\n    };\n    /**\n     * For use inside the library only.\n     * @param {import(\"../PluggableMap.js\").default|null} map Map.\n     */\n    Layer.prototype.setMapInternal = function (map) {\n        if (!map) {\n            this.unrender();\n        }\n        this.set(LayerProperty.MAP, map);\n    };\n    /**\n     * For use inside the library only.\n     * @return {import(\"../PluggableMap.js\").default|null} Map.\n     */\n    Layer.prototype.getMapInternal = function () {\n        return this.get(LayerProperty.MAP);\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, and the callback in\n     * {@link module:ol/Map~Map#forEachLayerAtPixel} will receive `null` as layer. 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(\"../PluggableMap.js\").default|null} map Map.\n     * @api\n     */\n    Layer.prototype.setMap = function (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(map, RenderEventType.PRECOMPOSE, function (evt) {\n                var renderEvent = \n                /** @type {import(\"../render/Event.js\").default} */ (evt);\n                var layerStatesArray = renderEvent.frameState.layerStatesArray;\n                var 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(!layerStatesArray.some(function (arrayLayerState) {\n                    return arrayLayerState.layer === layerState.layer;\n                }), 67);\n                layerStatesArray.push(layerState);\n            }, this);\n            this.mapRenderKey_ = listen(this, EventType.CHANGE, map.render, map);\n            this.changed();\n        }\n    };\n    /**\n     * Set the layer source.\n     * @param {SourceType|null} source The layer source.\n     * @observable\n     * @api\n     */\n    Layer.prototype.setSource = function (source) {\n        this.set(LayerProperty.SOURCE, source);\n    };\n    /**\n     * Get the renderer for this layer.\n     * @return {RendererType|null} The layer renderer.\n     */\n    Layer.prototype.getRenderer = function () {\n        if (!this.renderer_) {\n            this.renderer_ = this.createRenderer();\n        }\n        return this.renderer_;\n    };\n    /**\n     * @return {boolean} The layer has a renderer.\n     */\n    Layer.prototype.hasRenderer = function () {\n        return !!this.renderer_;\n    };\n    /**\n     * Create a renderer for this layer.\n     * @return {RendererType} A layer renderer.\n     * @protected\n     */\n    Layer.prototype.createRenderer = function () {\n        return null;\n    };\n    /**\n     * Clean up.\n     */\n    Layer.prototype.disposeInternal = function () {\n        if (this.renderer_) {\n            this.renderer_.dispose();\n            delete this.renderer_;\n        }\n        this.setSource(null);\n        _super.prototype.disposeInternal.call(this);\n    };\n    return Layer;\n}(BaseLayer));\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    var resolution = viewState.resolution;\n    if (resolution < layerState.minResolution ||\n        resolution >= layerState.maxResolution) {\n        return false;\n    }\n    var zoom = viewState.zoom;\n    return zoom > layerState.minZoom && zoom <= layerState.maxZoom;\n}\nexport default Layer;\n//# sourceMappingURL=Layer.js.map","/**\n * @module ol/layer/Property\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//# sourceMappingURL=Property.js.map","var __extends = (this && this.__extends) || (function () {\n    var extendStatics = function (d, b) {\n        extendStatics = Object.setPrototypeOf ||\n            ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\n            function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };\n        return extendStatics(d, b);\n    };\n    return function (d, b) {\n        if (typeof b !== \"function\" && b !== null)\n            throw new TypeError(\"Class extends value \" + String(b) + \" is not a constructor or null\");\n        extendStatics(d, b);\n        function __() { this.constructor = d; }\n        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\n    };\n})();\n/**\n * @module ol/layer/Tile\n */\nimport BaseTileLayer from './BaseTile.js';\nimport CanvasTileLayerRenderer from '../renderer/canvas/TileLayer.js';\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 */\nvar TileLayer = /** @class */ (function (_super) {\n    __extends(TileLayer, _super);\n    /**\n     * @param {import(\"./BaseTile.js\").Options<TileSourceType>} [opt_options] Tile layer options.\n     */\n    function TileLayer(opt_options) {\n        return _super.call(this, opt_options) || this;\n    }\n    TileLayer.prototype.createRenderer = function () {\n        return new CanvasTileLayerRenderer(this);\n    };\n    return TileLayer;\n}(BaseTileLayer));\nexport default TileLayer;\n//# sourceMappingURL=Tile.js.map","/**\n * @module ol/layer/TileProperty\n */\n/**\n * @enum {string}\n */\nexport default {\n    PRELOAD: 'preload',\n    USE_INTERIM_TILES_ON_ERROR: 'useInterimTilesOnError',\n};\n//# sourceMappingURL=TileProperty.js.map","var __extends = (this && this.__extends) || (function () {\n    var extendStatics = function (d, b) {\n        extendStatics = Object.setPrototypeOf ||\n            ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\n            function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };\n        return extendStatics(d, b);\n    };\n    return function (d, b) {\n        if (typeof b !== \"function\" && b !== null)\n            throw new TypeError(\"Class extends value \" + String(b) + \" is not a constructor or null\");\n        extendStatics(d, b);\n        function __() { this.constructor = d; }\n        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\n    };\n})();\n/**\n * @module ol/layer/Vector\n */\nimport BaseVectorLayer from './BaseVector.js';\nimport CanvasVectorLayerRenderer from '../renderer/canvas/VectorLayer.js';\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 */\nvar VectorLayer = /** @class */ (function (_super) {\n    __extends(VectorLayer, _super);\n    /**\n     * @param {import(\"./BaseVector.js\").Options<VectorSourceType>} [opt_options] Options.\n     */\n    function VectorLayer(opt_options) {\n        return _super.call(this, opt_options) || this;\n    }\n    VectorLayer.prototype.createRenderer = function () {\n        return new CanvasVectorLayerRenderer(this);\n    };\n    return VectorLayer;\n}(BaseVectorLayer));\nexport default VectorLayer;\n//# sourceMappingURL=Vector.js.map","/**\n * @module ol/loadingstrategy\n */\nimport { fromUserExtent, fromUserResolution, toUserExtent } from './proj.js';\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 * 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 * 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        var z = tileGrid.getZForResolution(fromUserResolution(resolution, projection));\n        var tileRange = tileGrid.getTileRangeForExtentAndZ(fromUserExtent(extent, projection), z);\n        /** @type {Array<import(\"./extent.js\").Extent>} */\n        var extents = [];\n        /** @type {import(\"./tilecoord.js\").TileCoord} */\n        var tileCoord = [z, 0, 0];\n        for (tileCoord[1] = tileRange.minX; tileCoord[1] <= tileRange.maxX; ++tileCoord[1]) {\n            for (tileCoord[2] = tileRange.minY; tileCoord[2] <= tileRange.maxY; ++tileCoord[2]) {\n                extents.push(toUserExtent(tileGrid.getTileCoordExtent(tileCoord), projection));\n            }\n        }\n        return extents;\n    });\n}\n//# sourceMappingURL=loadingstrategy.js.map","/**\n * @module ol/math\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 * Return the hyperbolic cosine of a given number. The method will use the\n * native `Math.cosh` function if it is available, otherwise the hyperbolic\n * cosine will be calculated via the reference implementation of the Mozilla\n * developer network.\n *\n * @param {number} x X.\n * @return {number} Hyperbolic cosine of x.\n */\nexport var cosh = (function () {\n    // Wrapped in a iife, to save the overhead of checking for the native\n    // implementation on every invocation.\n    var cosh;\n    if ('cosh' in Math) {\n        // The environment supports the native Math.cosh function, use it…\n        cosh = Math.cosh;\n    }\n    else {\n        // … else, use the reference implementation of MDN:\n        cosh = function (x) {\n            var y = /** @type {Math} */ (Math).exp(x);\n            return (y + 1 / y) / 2;\n        };\n    }\n    return cosh;\n})();\n/**\n * Return the base 2 logarithm of a given number. The method will use the\n * native `Math.log2` function if it is available, otherwise the base 2\n * logarithm will be calculated via the reference implementation of the\n * Mozilla developer network.\n *\n * @param {number} x X.\n * @return {number} Base 2 logarithm of x.\n */\nexport var log2 = (function () {\n    // Wrapped in a iife, to save the overhead of checking for the native\n    // implementation on every invocation.\n    var log2;\n    if ('log2' in Math) {\n        // The environment supports the native Math.log2 function, use it…\n        log2 = Math.log2;\n    }\n    else {\n        // … else, use the reference implementation of MDN:\n        log2 = function (x) {\n            return Math.log(x) * Math.LOG2E;\n        };\n    }\n    return log2;\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    var dx = x2 - x1;\n    var dy = y2 - y1;\n    if (dx !== 0 || dy !== 0) {\n        var t = ((x - x1) * dx + (y - y1) * dy) / (dx * dx + dy * dy);\n        if (t > 1) {\n            x1 = x2;\n            y1 = y2;\n        }\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 * 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    var dx = x2 - x1;\n    var dy = y2 - y1;\n    return dx * dx + dy * dy;\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    var n = mat.length;\n    for (var i = 0; i < n; i++) {\n        // Find max in the i-th column (ignoring i - 1 first rows)\n        var maxRow = i;\n        var maxEl = Math.abs(mat[i][i]);\n        for (var r = i + 1; r < n; r++) {\n            var absValue = Math.abs(mat[r][i]);\n            if (absValue > maxEl) {\n                maxEl = absValue;\n                maxRow = r;\n            }\n        }\n        if (maxEl === 0) {\n            return null; // matrix is singular\n        }\n        // Swap max row with i-th (current) row\n        var tmp = mat[maxRow];\n        mat[maxRow] = mat[i];\n        mat[i] = tmp;\n        // Subtract the i-th row to make all the remaining rows 0 in the i-th column\n        for (var j = i + 1; j < n; j++) {\n            var coef = -mat[j][i] / mat[i][i];\n            for (var k = i; k < n + 1; k++) {\n                if (i == k) {\n                    mat[j][k] = 0;\n                }\n                else {\n                    mat[j][k] += coef * mat[i][k];\n                }\n            }\n        }\n    }\n    // Solve Ax=b for upper triangular matrix A (mat)\n    var x = new Array(n);\n    for (var l = n - 1; l >= 0; l--) {\n        x[l] = mat[l][n] / mat[l][l];\n        for (var m = l - 1; m >= 0; m--) {\n            mat[m][n] -= mat[m][l] * x[l];\n        }\n    }\n    return x;\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 * 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 * 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    var r = a % b;\n    return r * b < 0 ? r + b : r;\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 * 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    var factor = Math.pow(10, decimals);\n    return Math.round(n * factor) / factor;\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 * 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 * 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//# sourceMappingURL=math.js.map","/**\n * @module ol/obj\n */\n/**\n * Polyfill for Object.assign().  Assigns enumerable and own properties from\n * one or more source objects to a target object.\n * See https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/Object/assign.\n *\n * @param {!Object} target The target object.\n * @param {...Object} var_sources The source object(s).\n * @return {!Object} The modified target object.\n */\nexport var assign = typeof Object.assign === 'function'\n    ? Object.assign\n    : function (target, var_sources) {\n        if (target === undefined || target === null) {\n            throw new TypeError('Cannot convert undefined or null to object');\n        }\n        var output = Object(target);\n        for (var i = 1, ii = arguments.length; i < ii; ++i) {\n            var source = arguments[i];\n            if (source !== undefined && source !== null) {\n                for (var key in source) {\n                    if (source.hasOwnProperty(key)) {\n                        output[key] = source[key];\n                    }\n                }\n            }\n        }\n        return output;\n    };\n/**\n * Removes all properties from an object.\n * @param {Object} object The object to clear.\n */\nexport function clear(object) {\n    for (var property in object) {\n        delete object[property];\n    }\n}\n/**\n * Polyfill for Object.values().  Get an array of property values from an object.\n * See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/values\n *\n * @param {!Object<K,V>} object The object from which to get the values.\n * @return {!Array<V>} The property values.\n * @template K,V\n */\nexport var getValues = typeof Object.values === 'function'\n    ? Object.values\n    : function (object) {\n        var values = [];\n        for (var property in object) {\n            values.push(object[property]);\n        }\n        return values;\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    var property;\n    for (property in object) {\n        return false;\n    }\n    return !property;\n}\n//# sourceMappingURL=obj.js.map"],"names":[],"sourceRoot":""}