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* @module ol/tilecoord\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 * @param {number} z Z.\n * @param {number} x X.\n * @param {number} y Y.\n * @param {TileCoord} [opt_tileCoord] Tile coordinate.\n * @return {TileCoord} Tile coordinate.\n */\nexport function createOrUpdate(z, x, y, opt_tileCoord) {\n    if (opt_tileCoord !== undefined) {\n        opt_tileCoord[0] = z;\n        opt_tileCoord[1] = x;\n        opt_tileCoord[2] = y;\n        return opt_tileCoord;\n    }\n    else {\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 * 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 * 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    var _a = tileKey\n        .substring(tileKey.lastIndexOf('/') + 1, tileKey.length)\n        .split(',')\n        .map(Number), z = _a[0], x = _a[1], y = _a[2];\n    return getKeyZXY(z, x, y);\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 * @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 * @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    var z = tileCoord[0];\n    var x = tileCoord[1];\n    var y = tileCoord[2];\n    if (tileGrid.getMinZoom() > z || z > tileGrid.getMaxZoom()) {\n        return false;\n    }\n    var tileRange = tileGrid.getFullTileRange(z);\n    if (!tileRange) {\n        return true;\n    }\n    else {\n        return tileRange.containsXY(x, y);\n    }\n}\n//# sourceMappingURL=tilecoord.js.map","/**\n * @module ol/tilegrid\n */\nimport TileGrid from './tilegrid/TileGrid.js';\nimport Units from './proj/Units.js';\nimport { DEFAULT_MAX_ZOOM, DEFAULT_TILE_SIZE } from './tilegrid/common.js';\nimport { METERS_PER_UNIT, get as getProjection } from './proj.js';\nimport { containsCoordinate, createOrUpdate, getCorner, getHeight, getWidth, } from './extent.js';\nimport { toSize } from './size.js';\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    var tileGrid = projection.getDefaultTileGrid();\n    if (!tileGrid) {\n        tileGrid = createForProjection(projection);\n        projection.setDefaultTileGrid(tileGrid);\n    }\n    return tileGrid;\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    var z = tileCoord[0];\n    var center = tileGrid.getTileCoordCenter(tileCoord);\n    var projectionExtent = extentFromProjection(projection);\n    if (!containsCoordinate(projectionExtent, center)) {\n        var worldWidth = getWidth(projectionExtent);\n        var worldsAway = Math.ceil((projectionExtent[0] - center[0]) / worldWidth);\n        center[0] += worldWidth * worldsAway;\n        return tileGrid.getTileCoordForCoordAndZ(center, z);\n    }\n    else {\n        return tileCoord;\n    }\n}\n/**\n * @param {import(\"./extent.js\").Extent} extent Extent.\n * @param {number} [opt_maxZoom] Maximum zoom level (default is\n *     DEFAULT_MAX_ZOOM).\n * @param {number|import(\"./size.js\").Size} [opt_tileSize] Tile size (default uses\n *     DEFAULT_TILE_SIZE).\n * @param {import(\"./extent.js\").Corner} [opt_corner] Extent corner (default is `'top-left'`).\n * @return {!TileGrid} TileGrid instance.\n */\nexport function createForExtent(extent, opt_maxZoom, opt_tileSize, opt_corner) {\n    var corner = opt_corner !== undefined ? opt_corner : 'top-left';\n    var resolutions = resolutionsFromExtent(extent, opt_maxZoom, opt_tileSize);\n    return new TileGrid({\n        extent: extent,\n        origin: getCorner(extent, corner),\n        resolutions: resolutions,\n        tileSize: opt_tileSize,\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 * Creates a tile grid with a standard XYZ tiling scheme.\n * @param {XYZOptions} [opt_options] Tile grid options.\n * @return {!TileGrid} Tile grid instance.\n * @api\n */\nexport function createXYZ(opt_options) {\n    var xyzOptions = opt_options || {};\n    var extent = xyzOptions.extent || getProjection('EPSG:3857').getExtent();\n    var gridOptions = {\n        extent: extent,\n        minZoom: xyzOptions.minZoom,\n        tileSize: xyzOptions.tileSize,\n        resolutions: resolutionsFromExtent(extent, xyzOptions.maxZoom, xyzOptions.tileSize, xyzOptions.maxResolution),\n    };\n    return new TileGrid(gridOptions);\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} [opt_maxZoom] Maximum zoom level (default is\n *     DEFAULT_MAX_ZOOM).\n * @param {number|import(\"./size.js\").Size} [opt_tileSize] Tile size (default uses\n *     DEFAULT_TILE_SIZE).\n * @param {number} [opt_maxResolution] Resolution at level zero.\n * @return {!Array<number>} Resolutions array.\n */\nfunction resolutionsFromExtent(extent, opt_maxZoom, opt_tileSize, opt_maxResolution) {\n    var maxZoom = opt_maxZoom !== undefined ? opt_maxZoom : DEFAULT_MAX_ZOOM;\n    var height = getHeight(extent);\n    var width = getWidth(extent);\n    var tileSize = toSize(opt_tileSize !== undefined ? opt_tileSize : DEFAULT_TILE_SIZE);\n    var maxResolution = opt_maxResolution > 0\n        ? opt_maxResolution\n        : Math.max(width / tileSize[0], height / tileSize[1]);\n    var length = maxZoom + 1;\n    var resolutions = new Array(length);\n    for (var z = 0; z < length; ++z) {\n        resolutions[z] = maxResolution / Math.pow(2, z);\n    }\n    return resolutions;\n}\n/**\n * @param {import(\"./proj.js\").ProjectionLike} projection Projection.\n * @param {number} [opt_maxZoom] Maximum zoom level (default is\n *     DEFAULT_MAX_ZOOM).\n * @param {number|import(\"./size.js\").Size} [opt_tileSize] Tile size (default uses\n *     DEFAULT_TILE_SIZE).\n * @param {import(\"./extent.js\").Corner} [opt_corner] Extent corner (default is `'top-left'`).\n * @return {!TileGrid} TileGrid instance.\n */\nexport function createForProjection(projection, opt_maxZoom, opt_tileSize, opt_corner) {\n    var extent = extentFromProjection(projection);\n    return createForExtent(extent, opt_maxZoom, opt_tileSize, opt_corner);\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    var extent = projection.getExtent();\n    if (!extent) {\n        var half = (180 * METERS_PER_UNIT[Units.DEGREES]) / projection.getMetersPerUnit();\n        extent = createOrUpdate(-half, -half, half, half);\n    }\n    return extent;\n}\n//# sourceMappingURL=tilegrid.js.map","/**\n * @module ol/tilegrid/TileGrid\n */\nimport TileRange, { createOrUpdate as createOrUpdateTileRange, } 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 * @private\n * @type {import(\"../tilecoord.js\").TileCoord}\n */\nvar tmpTileCoord = [0, 0, 0];\n/**\n * Number of decimal digits to consider in integer values when rounding.\n * @type {number}\n */\nvar DECIMALS = 5;\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 * @classdesc\n * Base class for setting the grid pattern for sources accessing tiled-image\n * servers.\n * @api\n */\nvar TileGrid = /** @class */ (function () {\n    /**\n     * @param {Options} options Tile grid options.\n     */\n    function TileGrid(options) {\n        /**\n         * @protected\n         * @type {number}\n         */\n        this.minZoom = options.minZoom !== undefined ? options.minZoom : 0;\n        /**\n         * @private\n         * @type {!Array<number>}\n         */\n        this.resolutions_ = options.resolutions;\n        assert(isSorted(this.resolutions_, function (a, b) {\n            return b - a;\n        }, true), 17); // `resolutions` must be sorted in descending order\n        // check if we've got a consistent zoom factor and origin\n        var zoomFactor;\n        if (!options.origins) {\n            for (var i = 0, ii = this.resolutions_.length - 1; i < ii; ++i) {\n                if (!zoomFactor) {\n                    zoomFactor = this.resolutions_[i] / this.resolutions_[i + 1];\n                }\n                else {\n                    if (this.resolutions_[i] / this.resolutions_[i + 1] !== zoomFactor) {\n                        zoomFactor = undefined;\n                        break;\n                    }\n                }\n            }\n        }\n        /**\n         * @private\n         * @type {number|undefined}\n         */\n        this.zoomFactor_ = zoomFactor;\n        /**\n         * @protected\n         * @type {number}\n         */\n        this.maxZoom = this.resolutions_.length - 1;\n        /**\n         * @private\n         * @type {import(\"../coordinate.js\").Coordinate|null}\n         */\n        this.origin_ = options.origin !== undefined ? options.origin : null;\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        var extent = options.extent;\n        if (extent !== undefined && !this.origin_ && !this.origins_) {\n            this.origin_ = getTopLeft(extent);\n        }\n        assert((!this.origin_ && this.origins_) || (this.origin_ && !this.origins_), 18); // Either `origin` or `origins` must be configured, never both\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         * @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((!this.tileSize_ && this.tileSizes_) ||\n            (this.tileSize_ && !this.tileSizes_), 22); // Either `tileSize` or `tileSizes` must be configured, never both\n        /**\n         * @private\n         * @type {import(\"../extent.js\").Extent}\n         */\n        this.extent_ = extent !== undefined ? extent : null;\n        /**\n         * @private\n         * @type {Array<import(\"../TileRange.js\").default>}\n         */\n        this.fullTileRanges_ = null;\n        /**\n         * @private\n         * @type {import(\"../size.js\").Size}\n         */\n        this.tmpSize_ = [0, 0];\n        /**\n         * @private\n         * @type {import(\"../extent.js\").Extent}\n         */\n        this.tmpExtent_ = [0, 0, 0, 0];\n        if (options.sizes !== undefined) {\n            this.fullTileRanges_ = options.sizes.map(function (size, z) {\n                var tileRange = new TileRange(Math.min(0, size[0]), Math.max(size[0] - 1, -1), Math.min(0, size[1]), Math.max(size[1] - 1, -1));\n                if (extent) {\n                    var 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        }\n        else if (extent) {\n            this.calculateTileRanges_(extent);\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    TileGrid.prototype.forEachTileCoord = function (extent, zoom, callback) {\n        var tileRange = this.getTileRangeForExtentAndZ(extent, zoom);\n        for (var i = tileRange.minX, ii = tileRange.maxX; i <= ii; ++i) {\n            for (var j = tileRange.minY, jj = tileRange.maxY; j <= jj; ++j) {\n                callback([zoom, i, j]);\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} [opt_tileRange] Temporary import(\"../TileRange.js\").default object.\n     * @param {import(\"../extent.js\").Extent} [opt_extent] Temporary import(\"../extent.js\").Extent object.\n     * @return {boolean} Callback succeeded.\n     */\n    TileGrid.prototype.forEachTileCoordParentTileRange = function (tileCoord, callback, opt_tileRange, opt_extent) {\n        var tileRange, x, y;\n        var tileCoordExtent = null;\n        var z = tileCoord[0] - 1;\n        if (this.zoomFactor_ === 2) {\n            x = tileCoord[1];\n            y = tileCoord[2];\n        }\n        else {\n            tileCoordExtent = this.getTileCoordExtent(tileCoord, opt_extent);\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, opt_tileRange);\n            }\n            else {\n                tileRange = this.getTileRangeForExtentAndZ(tileCoordExtent, z, opt_tileRange);\n            }\n            if (callback(z, tileRange)) {\n                return true;\n            }\n            --z;\n        }\n        return false;\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    TileGrid.prototype.getExtent = function () {\n        return this.extent_;\n    };\n    /**\n     * Get the maximum zoom level for the grid.\n     * @return {number} Max zoom.\n     * @api\n     */\n    TileGrid.prototype.getMaxZoom = function () {\n        return this.maxZoom;\n    };\n    /**\n     * Get the minimum zoom level for the grid.\n     * @return {number} Min zoom.\n     * @api\n     */\n    TileGrid.prototype.getMinZoom = function () {\n        return this.minZoom;\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    TileGrid.prototype.getOrigin = function (z) {\n        if (this.origin_) {\n            return this.origin_;\n        }\n        else {\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    TileGrid.prototype.getResolution = function (z) {\n        return this.resolutions_[z];\n    };\n    /**\n     * Get the list of resolutions for the tile grid.\n     * @return {Array<number>} Resolutions.\n     * @api\n     */\n    TileGrid.prototype.getResolutions = function () {\n        return this.resolutions_;\n    };\n    /**\n     * @param {import(\"../tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n     * @param {import(\"../TileRange.js\").default} [opt_tileRange] Temporary import(\"../TileRange.js\").default object.\n     * @param {import(\"../extent.js\").Extent} [opt_extent] Temporary import(\"../extent.js\").Extent object.\n     * @return {import(\"../TileRange.js\").default|null} Tile range.\n     */\n    TileGrid.prototype.getTileCoordChildTileRange = function (tileCoord, opt_tileRange, opt_extent) {\n        if (tileCoord[0] < this.maxZoom) {\n            if (this.zoomFactor_ === 2) {\n                var minX = tileCoord[1] * 2;\n                var minY = tileCoord[2] * 2;\n                return createOrUpdateTileRange(minX, minX + 1, minY, minY + 1, opt_tileRange);\n            }\n            var tileCoordExtent = this.getTileCoordExtent(tileCoord, opt_extent || this.tmpExtent_);\n            return this.getTileRangeForExtentAndZ(tileCoordExtent, tileCoord[0] + 1, opt_tileRange);\n        }\n        return null;\n    };\n    /**\n     * @param {import(\"../tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n     * @param {number} z Integer zoom level.\n     * @param {import(\"../TileRange.js\").default} [opt_tileRange] Temporary import(\"../TileRange.js\").default object.\n     * @return {import(\"../TileRange.js\").default|null} Tile range.\n     */\n    TileGrid.prototype.getTileRangeForTileCoordAndZ = function (tileCoord, z, opt_tileRange) {\n        if (z > this.maxZoom || z < this.minZoom) {\n            return null;\n        }\n        var tileCoordZ = tileCoord[0];\n        var tileCoordX = tileCoord[1];\n        var tileCoordY = tileCoord[2];\n        if (z === tileCoordZ) {\n            return createOrUpdateTileRange(tileCoordX, tileCoordY, tileCoordX, tileCoordY, opt_tileRange);\n        }\n        if (this.zoomFactor_) {\n            var factor = Math.pow(this.zoomFactor_, z - tileCoordZ);\n            var minX = Math.floor(tileCoordX * factor);\n            var minY = Math.floor(tileCoordY * factor);\n            if (z < tileCoordZ) {\n                return createOrUpdateTileRange(minX, minX, minY, minY, opt_tileRange);\n            }\n            var maxX = Math.floor(factor * (tileCoordX + 1)) - 1;\n            var maxY = Math.floor(factor * (tileCoordY + 1)) - 1;\n            return createOrUpdateTileRange(minX, maxX, minY, maxY, opt_tileRange);\n        }\n        var tileCoordExtent = this.getTileCoordExtent(tileCoord, this.tmpExtent_);\n        return this.getTileRangeForExtentAndZ(tileCoordExtent, z, opt_tileRange);\n    };\n    /**\n     * Get the extent for a tile range.\n     * @param {number} z Integer zoom level.\n     * @param {import(\"../TileRange.js\").default} tileRange Tile range.\n     * @param {import(\"../extent.js\").Extent} [opt_extent] Temporary import(\"../extent.js\").Extent object.\n     * @return {import(\"../extent.js\").Extent} Extent.\n     */\n    TileGrid.prototype.getTileRangeExtent = function (z, tileRange, opt_extent) {\n        var origin = this.getOrigin(z);\n        var resolution = this.getResolution(z);\n        var tileSize = toSize(this.getTileSize(z), this.tmpSize_);\n        var minX = origin[0] + tileRange.minX * tileSize[0] * resolution;\n        var maxX = origin[0] + (tileRange.maxX + 1) * tileSize[0] * resolution;\n        var minY = origin[1] + tileRange.minY * tileSize[1] * resolution;\n        var maxY = origin[1] + (tileRange.maxY + 1) * tileSize[1] * resolution;\n        return createOrUpdate(minX, minY, maxX, maxY, opt_extent);\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} [opt_tileRange] Temporary tile range object.\n     * @return {import(\"../TileRange.js\").default} Tile range.\n     */\n    TileGrid.prototype.getTileRangeForExtentAndZ = function (extent, z, opt_tileRange) {\n        var tileCoord = tmpTileCoord;\n        this.getTileCoordForXYAndZ_(extent[0], extent[3], z, false, tileCoord);\n        var minX = tileCoord[1];\n        var minY = tileCoord[2];\n        this.getTileCoordForXYAndZ_(extent[2], extent[1], z, true, tileCoord);\n        return createOrUpdateTileRange(minX, tileCoord[1], minY, tileCoord[2], opt_tileRange);\n    };\n    /**\n     * @param {import(\"../tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n     * @return {import(\"../coordinate.js\").Coordinate} Tile center.\n     */\n    TileGrid.prototype.getTileCoordCenter = function (tileCoord) {\n        var origin = this.getOrigin(tileCoord[0]);\n        var resolution = this.getResolution(tileCoord[0]);\n        var 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     * Get the extent of a tile coordinate.\n     *\n     * @param {import(\"../tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n     * @param {import(\"../extent.js\").Extent} [opt_extent] Temporary extent object.\n     * @return {import(\"../extent.js\").Extent} Extent.\n     * @api\n     */\n    TileGrid.prototype.getTileCoordExtent = function (tileCoord, opt_extent) {\n        var origin = this.getOrigin(tileCoord[0]);\n        var resolution = this.getResolution(tileCoord[0]);\n        var tileSize = toSize(this.getTileSize(tileCoord[0]), this.tmpSize_);\n        var minX = origin[0] + tileCoord[1] * tileSize[0] * resolution;\n        var minY = origin[1] - (tileCoord[2] + 1) * tileSize[1] * resolution;\n        var maxX = minX + tileSize[0] * resolution;\n        var maxY = minY + tileSize[1] * resolution;\n        return createOrUpdate(minX, minY, maxX, maxY, opt_extent);\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    TileGrid.prototype.getTileCoordForCoordAndResolution = function (coordinate, resolution, opt_tileCoord) {\n        return this.getTileCoordForXYAndResolution_(coordinate[0], coordinate[1], resolution, false, opt_tileCoord);\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    TileGrid.prototype.getTileCoordForXYAndResolution_ = function (x, y, resolution, reverseIntersectionPolicy, opt_tileCoord) {\n        var z = this.getZForResolution(resolution);\n        var scale = resolution / this.getResolution(z);\n        var origin = this.getOrigin(z);\n        var tileSize = toSize(this.getTileSize(z), this.tmpSize_);\n        var tileCoordX = (scale * (x - origin[0])) / resolution / tileSize[0];\n        var tileCoordY = (scale * (origin[1] - y)) / resolution / tileSize[1];\n        if (reverseIntersectionPolicy) {\n            tileCoordX = ceil(tileCoordX, DECIMALS) - 1;\n            tileCoordY = ceil(tileCoordY, DECIMALS) - 1;\n        }\n        else {\n            tileCoordX = floor(tileCoordX, DECIMALS);\n            tileCoordY = floor(tileCoordY, DECIMALS);\n        }\n        return createOrUpdateTileCoord(z, tileCoordX, tileCoordY, opt_tileCoord);\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    TileGrid.prototype.getTileCoordForXYAndZ_ = function (x, y, z, reverseIntersectionPolicy, opt_tileCoord) {\n        var origin = this.getOrigin(z);\n        var resolution = this.getResolution(z);\n        var tileSize = toSize(this.getTileSize(z), this.tmpSize_);\n        var tileCoordX = (x - origin[0]) / resolution / tileSize[0];\n        var tileCoordY = (origin[1] - y) / resolution / tileSize[1];\n        if (reverseIntersectionPolicy) {\n            tileCoordX = ceil(tileCoordX, DECIMALS) - 1;\n            tileCoordY = ceil(tileCoordY, DECIMALS) - 1;\n        }\n        else {\n            tileCoordX = floor(tileCoordX, DECIMALS);\n            tileCoordY = floor(tileCoordY, DECIMALS);\n        }\n        return createOrUpdateTileCoord(z, tileCoordX, tileCoordY, opt_tileCoord);\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    TileGrid.prototype.getTileCoordForCoordAndZ = function (coordinate, z, opt_tileCoord) {\n        return this.getTileCoordForXYAndZ_(coordinate[0], coordinate[1], z, false, opt_tileCoord);\n    };\n    /**\n     * @param {import(\"../tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n     * @return {number} Tile resolution.\n     */\n    TileGrid.prototype.getTileCoordResolution = function (tileCoord) {\n        return this.resolutions_[tileCoord[0]];\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    TileGrid.prototype.getTileSize = function (z) {\n        if (this.tileSize_) {\n            return this.tileSize_;\n        }\n        else {\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    TileGrid.prototype.getFullTileRange = function (z) {\n        if (!this.fullTileRanges_) {\n            return this.extent_\n                ? this.getTileRangeForExtentAndZ(this.extent_, z)\n                : null;\n        }\n        else {\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    TileGrid.prototype.getZForResolution = function (resolution, opt_direction) {\n        var z = linearFindNearest(this.resolutions_, resolution, opt_direction || 0);\n        return clamp(z, this.minZoom, this.maxZoom);\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    TileGrid.prototype.tileCoordIntersectsViewport = function (tileCoord, viewport) {\n        return intersectsLinearRing(viewport, 0, viewport.length, 2, this.getTileCoordExtent(tileCoord));\n    };\n    /**\n     * @param {!import(\"../extent.js\").Extent} extent Extent for this tile grid.\n     * @private\n     */\n    TileGrid.prototype.calculateTileRanges_ = function (extent) {\n        var length = this.resolutions_.length;\n        var fullTileRanges = new Array(length);\n        for (var z = this.minZoom; z < length; ++z) {\n            fullTileRanges[z] = this.getTileRangeForExtentAndZ(extent, z);\n        }\n        this.fullTileRanges_ = fullTileRanges;\n    };\n    return TileGrid;\n}());\nexport default TileGrid;\n//# sourceMappingURL=TileGrid.js.map","/**\n * @module ol/tilegrid/common\n */\n/**\n * Default maximum zoom for default tile grids.\n * @type {number}\n */\nexport var DEFAULT_MAX_ZOOM = 42;\n/**\n * Default tile size.\n * @type {number}\n */\nexport var DEFAULT_TILE_SIZE = 256;\n//# sourceMappingURL=common.js.map","/**\n * @module ol/tileurlfunction\n */\nimport { assert } from './asserts.js';\nimport { modulo } from './math.js';\nimport { hash as tileCoordHash } from './tilecoord.js';\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    var zRegEx = /\\{z\\}/g;\n    var xRegEx = /\\{x\\}/g;\n    var yRegEx = /\\{y\\}/g;\n    var 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        else {\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                var z = tileCoord[0];\n                var range = tileGrid.getFullTileRange(z);\n                assert(range, 55); // The {-y} placeholder requires a tile grid with extent\n                var y = range.getHeight() - tileCoord[2] - 1;\n                return y.toString();\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    var len = templates.length;\n    var tileUrlFunctions = new Array(len);\n    for (var i = 0; i < len; ++i) {\n        tileUrlFunctions[i] = createFromTemplate(templates[i], tileGrid);\n    }\n    return createFromTileUrlFunctions(tileUrlFunctions);\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        else {\n            var h = tileCoordHash(tileCoord);\n            var index = modulo(h, tileUrlFunctions.length);\n            return tileUrlFunctions[index](tileCoord, pixelRatio, projection);\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 * @param {string} url URL.\n * @return {Array<string>} Array of urls.\n */\nexport function expandUrl(url) {\n    var urls = [];\n    var match = /\\{([a-z])-([a-z])\\}/.exec(url);\n    if (match) {\n        // char range\n        var startCharCode = match[1].charCodeAt(0);\n        var stopCharCode = match[2].charCodeAt(0);\n        var charCode = void 0;\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        var stop_1 = parseInt(match[2], 10);\n        for (var i = parseInt(match[1], 10); i <= stop_1; i++) {\n            urls.push(url.replace(match[0], i.toString()));\n        }\n        return urls;\n    }\n    urls.push(url);\n    return urls;\n}\n//# sourceMappingURL=tileurlfunction.js.map","/**\n * @module ol/transform\n */\nimport { WORKER_OFFSCREEN_CANVAS } from './has.js';\nimport { assert } from './asserts.js';\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 * 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 * @private\n * @type {Transform}\n */\nvar tmp_ = new Array(6);\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 * 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 * 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    var a1 = transform1[0];\n    var b1 = transform1[1];\n    var c1 = transform1[2];\n    var d1 = transform1[3];\n    var e1 = transform1[4];\n    var f1 = transform1[5];\n    var a2 = transform2[0];\n    var b2 = transform2[1];\n    var c2 = transform2[2];\n    var d2 = transform2[3];\n    var e2 = transform2[4];\n    var f2 = transform2[5];\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    return transform1;\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 * 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 * 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    var x = coordinate[0];\n    var 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 * 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    var cos = Math.cos(angle);\n    var sin = Math.sin(angle);\n    return multiply(transform, set(tmp_, cos, sin, -sin, cos, 0, 0));\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 * 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 * 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 * 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    var sin = Math.sin(angle);\n    var 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 * 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 * 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 * 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    var det = determinant(source);\n    assert(det !== 0, 32); // Transformation matrix cannot be inverted\n    var a = source[0];\n    var b = source[1];\n    var c = source[2];\n    var d = source[3];\n    var e = source[4];\n    var f = source[5];\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    return target;\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 * @type {HTMLElement}\n * @private\n */\nvar transformStringDiv;\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    var transformString = 'matrix(' + mat.join(', ') + ')';\n    if (WORKER_OFFSCREEN_CANVAS) {\n        return transformString;\n    }\n    var node = transformStringDiv || (transformStringDiv = document.createElement('div'));\n    node.style.transform = transformString;\n    return node.style.transform;\n}\n//# sourceMappingURL=transform.js.map","/**\n * @module ol/util\n */\n/**\n * @return {?} Any return.\n */\nexport function abstract() {\n    return /** @type {?} */ ((function () {\n        throw new Error('Unimplemented abstract method.');\n    })());\n}\n/**\n * Counter for getUid.\n * @type {number}\n * @private\n */\nvar uidCounter_ = 0;\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 * OpenLayers version.\n * @type {string}\n */\nexport var VERSION = '6.15.1';\n//# sourceMappingURL=util.js.map"],"names":[],"sourceRoot":""}