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{ getCoord } from \"@turf/invariant\";\nimport { radiansToLength, degreesToRadians, } from \"@turf/helpers\";\n//http://en.wikipedia.org/wiki/Haversine_formula\n//http://www.movable-type.co.uk/scripts/latlong.html\n/**\n * Calculates the distance between two {@link Point|points} in degrees, radians, miles, or kilometers.\n * This uses the [Haversine formula](http://en.wikipedia.org/wiki/Haversine_formula) to account for global curvature.\n *\n * @name distance\n * @param {Coord | Point} from origin point or coordinate\n * @param {Coord | Point} to destination point or coordinate\n * @param {Object} [options={}] Optional parameters\n * @param {string} [options.units='kilometers'] can be degrees, radians, miles, or kilometers\n * @returns {number} distance between the two points\n * @example\n * var from = turf.point([-75.343, 39.984]);\n * var to = turf.point([-75.534, 39.123]);\n * var options = {units: 'miles'};\n *\n * var distance = turf.distance(from, to, options);\n *\n * //addToMap\n * var addToMap = [from, to];\n * from.properties.distance = distance;\n * to.properties.distance = distance;\n */\nfunction distance(from, to, options) {\n    if (options === void 0) { options = {}; }\n    var coordinates1 = getCoord(from);\n    var coordinates2 = getCoord(to);\n    var dLat = degreesToRadians(coordinates2[1] - coordinates1[1]);\n    var dLon = degreesToRadians(coordinates2[0] - coordinates1[0]);\n    var lat1 = degreesToRadians(coordinates1[1]);\n    var lat2 = degreesToRadians(coordinates2[1]);\n    var a = Math.pow(Math.sin(dLat / 2), 2) +\n        Math.pow(Math.sin(dLon / 2), 2) * Math.cos(lat1) * Math.cos(lat2);\n    return radiansToLength(2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a)), options.units);\n}\nexport default distance;\n","/**\n * @module helpers\n */\n/**\n * Earth Radius used with the Harvesine formula and approximates using a spherical (non-ellipsoid) Earth.\n *\n * @memberof helpers\n * @type {number}\n */\nexport var earthRadius = 6371008.8;\n/**\n * Unit of measurement factors using a spherical (non-ellipsoid) earth radius.\n *\n * @memberof helpers\n * @type {Object}\n */\nexport var factors = {\n    centimeters: earthRadius * 100,\n    centimetres: earthRadius * 100,\n    degrees: earthRadius / 111325,\n    feet: earthRadius * 3.28084,\n    inches: earthRadius * 39.37,\n    kilometers: earthRadius / 1000,\n    kilometres: earthRadius / 1000,\n    meters: earthRadius,\n    metres: earthRadius,\n    miles: earthRadius / 1609.344,\n    millimeters: earthRadius * 1000,\n    millimetres: earthRadius * 1000,\n    nauticalmiles: earthRadius / 1852,\n    radians: 1,\n    yards: earthRadius * 1.0936,\n};\n/**\n * Units of measurement factors based on 1 meter.\n *\n * @memberof helpers\n * @type {Object}\n */\nexport var unitsFactors = {\n    centimeters: 100,\n    centimetres: 100,\n    degrees: 1 / 111325,\n    feet: 3.28084,\n    inches: 39.37,\n    kilometers: 1 / 1000,\n    kilometres: 1 / 1000,\n    meters: 1,\n    metres: 1,\n    miles: 1 / 1609.344,\n    millimeters: 1000,\n    millimetres: 1000,\n    nauticalmiles: 1 / 1852,\n    radians: 1 / earthRadius,\n    yards: 1.0936133,\n};\n/**\n * Area of measurement factors based on 1 square meter.\n *\n * @memberof helpers\n * @type {Object}\n */\nexport var areaFactors = {\n    acres: 0.000247105,\n    centimeters: 10000,\n    centimetres: 10000,\n    feet: 10.763910417,\n    hectares: 0.0001,\n    inches: 1550.003100006,\n    kilometers: 0.000001,\n    kilometres: 0.000001,\n    meters: 1,\n    metres: 1,\n    miles: 3.86e-7,\n    millimeters: 1000000,\n    millimetres: 1000000,\n    yards: 1.195990046,\n};\n/**\n * Wraps a GeoJSON {@link Geometry} in a GeoJSON {@link Feature}.\n *\n * @name feature\n * @param {Geometry} geometry input geometry\n * @param {Object} [properties={}] an Object of key-value pairs to add as properties\n * @param {Object} [options={}] Optional Parameters\n * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature\n * @param {string|number} [options.id] Identifier associated with the Feature\n * @returns {Feature} a GeoJSON Feature\n * @example\n * var geometry = {\n *   \"type\": \"Point\",\n *   \"coordinates\": [110, 50]\n * };\n *\n * var feature = turf.feature(geometry);\n *\n * //=feature\n */\nexport function feature(geom, properties, options) {\n    if (options === void 0) { options = {}; }\n    var feat = { type: \"Feature\" };\n    if (options.id === 0 || options.id) {\n        feat.id = options.id;\n    }\n    if (options.bbox) {\n        feat.bbox = options.bbox;\n    }\n    feat.properties = properties || {};\n    feat.geometry = geom;\n    return feat;\n}\n/**\n * Creates a GeoJSON {@link Geometry} from a Geometry string type & coordinates.\n * For GeometryCollection type use `helpers.geometryCollection`\n *\n * @name geometry\n * @param {string} type Geometry Type\n * @param {Array<any>} coordinates Coordinates\n * @param {Object} [options={}] Optional Parameters\n * @returns {Geometry} a GeoJSON Geometry\n * @example\n * var type = \"Point\";\n * var coordinates = [110, 50];\n * var geometry = turf.geometry(type, coordinates);\n * // => geometry\n */\nexport function geometry(type, coordinates, _options) {\n    if (_options === void 0) { _options = {}; }\n    switch (type) {\n        case \"Point\":\n            return point(coordinates).geometry;\n        case \"LineString\":\n            return lineString(coordinates).geometry;\n        case \"Polygon\":\n            return polygon(coordinates).geometry;\n        case \"MultiPoint\":\n            return multiPoint(coordinates).geometry;\n        case \"MultiLineString\":\n            return multiLineString(coordinates).geometry;\n        case \"MultiPolygon\":\n            return multiPolygon(coordinates).geometry;\n        default:\n            throw new Error(type + \" is invalid\");\n    }\n}\n/**\n * Creates a {@link Point} {@link Feature} from a Position.\n *\n * @name point\n * @param {Array<number>} coordinates longitude, latitude position (each in decimal degrees)\n * @param {Object} [properties={}] an Object of key-value pairs to add as properties\n * @param {Object} [options={}] Optional Parameters\n * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature\n * @param {string|number} [options.id] Identifier associated with the Feature\n * @returns {Feature<Point>} a Point feature\n * @example\n * var point = turf.point([-75.343, 39.984]);\n *\n * //=point\n */\nexport function point(coordinates, properties, options) {\n    if (options === void 0) { options = {}; }\n    if (!coordinates) {\n        throw new Error(\"coordinates is required\");\n    }\n    if (!Array.isArray(coordinates)) {\n        throw new Error(\"coordinates must be an Array\");\n    }\n    if (coordinates.length < 2) {\n        throw new Error(\"coordinates must be at least 2 numbers long\");\n    }\n    if (!isNumber(coordinates[0]) || !isNumber(coordinates[1])) {\n        throw new Error(\"coordinates must contain numbers\");\n    }\n    var geom = {\n        type: \"Point\",\n        coordinates: coordinates,\n    };\n    return feature(geom, properties, options);\n}\n/**\n * Creates a {@link Point} {@link FeatureCollection} from an Array of Point coordinates.\n *\n * @name points\n * @param {Array<Array<number>>} coordinates an array of Points\n * @param {Object} [properties={}] Translate these properties to each Feature\n * @param {Object} [options={}] Optional Parameters\n * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north]\n * associated with the FeatureCollection\n * @param {string|number} [options.id] Identifier associated with the FeatureCollection\n * @returns {FeatureCollection<Point>} Point Feature\n * @example\n * var points = turf.points([\n *   [-75, 39],\n *   [-80, 45],\n *   [-78, 50]\n * ]);\n *\n * //=points\n */\nexport function points(coordinates, properties, options) {\n    if (options === void 0) { options = {}; }\n    return featureCollection(coordinates.map(function (coords) {\n        return point(coords, properties);\n    }), options);\n}\n/**\n * Creates a {@link Polygon} {@link Feature} from an Array of LinearRings.\n *\n * @name polygon\n * @param {Array<Array<Array<number>>>} coordinates an array of LinearRings\n * @param {Object} [properties={}] an Object of key-value pairs to add as properties\n * @param {Object} [options={}] Optional Parameters\n * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature\n * @param {string|number} [options.id] Identifier associated with the Feature\n * @returns {Feature<Polygon>} Polygon Feature\n * @example\n * var polygon = turf.polygon([[[-5, 52], [-4, 56], [-2, 51], [-7, 54], [-5, 52]]], { name: 'poly1' });\n *\n * //=polygon\n */\nexport function polygon(coordinates, properties, options) {\n    if (options === void 0) { options = {}; }\n    for (var _i = 0, coordinates_1 = coordinates; _i < coordinates_1.length; _i++) {\n        var ring = coordinates_1[_i];\n        if (ring.length < 4) {\n            throw new Error(\"Each LinearRing of a Polygon must have 4 or more Positions.\");\n        }\n        for (var j = 0; j < ring[ring.length - 1].length; j++) {\n            // Check if first point of Polygon contains two numbers\n            if (ring[ring.length - 1][j] !== ring[0][j]) {\n                throw new Error(\"First and last Position are not equivalent.\");\n            }\n        }\n    }\n    var geom = {\n        type: \"Polygon\",\n        coordinates: coordinates,\n    };\n    return feature(geom, properties, options);\n}\n/**\n * Creates a {@link Polygon} {@link FeatureCollection} from an Array of Polygon coordinates.\n *\n * @name polygons\n * @param {Array<Array<Array<Array<number>>>>} coordinates an array of Polygon coordinates\n * @param {Object} [properties={}] an Object of key-value pairs to add as properties\n * @param {Object} [options={}] Optional Parameters\n * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature\n * @param {string|number} [options.id] Identifier associated with the FeatureCollection\n * @returns {FeatureCollection<Polygon>} Polygon FeatureCollection\n * @example\n * var polygons = turf.polygons([\n *   [[[-5, 52], [-4, 56], [-2, 51], [-7, 54], [-5, 52]]],\n *   [[[-15, 42], [-14, 46], [-12, 41], [-17, 44], [-15, 42]]],\n * ]);\n *\n * //=polygons\n */\nexport function polygons(coordinates, properties, options) {\n    if (options === void 0) { options = {}; }\n    return featureCollection(coordinates.map(function (coords) {\n        return polygon(coords, properties);\n    }), options);\n}\n/**\n * Creates a {@link LineString} {@link Feature} from an Array of Positions.\n *\n * @name lineString\n * @param {Array<Array<number>>} coordinates an array of Positions\n * @param {Object} [properties={}] an Object of key-value pairs to add as properties\n * @param {Object} [options={}] Optional Parameters\n * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature\n * @param {string|number} [options.id] Identifier associated with the Feature\n * @returns {Feature<LineString>} LineString Feature\n * @example\n * var linestring1 = turf.lineString([[-24, 63], [-23, 60], [-25, 65], [-20, 69]], {name: 'line 1'});\n * var linestring2 = turf.lineString([[-14, 43], [-13, 40], [-15, 45], [-10, 49]], {name: 'line 2'});\n *\n * //=linestring1\n * //=linestring2\n */\nexport function lineString(coordinates, properties, options) {\n    if (options === void 0) { options = {}; }\n    if (coordinates.length < 2) {\n        throw new Error(\"coordinates must be an array of two or more positions\");\n    }\n    var geom = {\n        type: \"LineString\",\n        coordinates: coordinates,\n    };\n    return feature(geom, properties, options);\n}\n/**\n * Creates a {@link LineString} {@link FeatureCollection} from an Array of LineString coordinates.\n *\n * @name lineStrings\n * @param {Array<Array<Array<number>>>} coordinates an array of LinearRings\n * @param {Object} [properties={}] an Object of key-value pairs to add as properties\n * @param {Object} [options={}] Optional Parameters\n * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north]\n * associated with the FeatureCollection\n * @param {string|number} [options.id] Identifier associated with the FeatureCollection\n * @returns {FeatureCollection<LineString>} LineString FeatureCollection\n * @example\n * var linestrings = turf.lineStrings([\n *   [[-24, 63], [-23, 60], [-25, 65], [-20, 69]],\n *   [[-14, 43], [-13, 40], [-15, 45], [-10, 49]]\n * ]);\n *\n * //=linestrings\n */\nexport function lineStrings(coordinates, properties, options) {\n    if (options === void 0) { options = {}; }\n 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featureCollection(features, options) {\n    if (options === void 0) { options = {}; }\n    var fc = { type: \"FeatureCollection\" };\n    if (options.id) {\n        fc.id = options.id;\n    }\n    if (options.bbox) {\n        fc.bbox = options.bbox;\n    }\n    fc.features = features;\n    return fc;\n}\n/**\n * Creates a {@link Feature<MultiLineString>} based on a\n * coordinate array. Properties can be added optionally.\n *\n * @name multiLineString\n * @param {Array<Array<Array<number>>>} coordinates an array of LineStrings\n * @param {Object} [properties={}] an Object of key-value pairs to add as properties\n * @param {Object} [options={}] Optional Parameters\n * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature\n * @param {string|number} [options.id] Identifier associated with the Feature\n * @returns {Feature<MultiLineString>} a MultiLineString feature\n * @throws {Error} if no coordinates are passed\n * @example\n * var multiLine = turf.multiLineString([[[0,0],[10,10]]]);\n *\n * //=multiLine\n */\nexport function multiLineString(coordinates, properties, options) {\n    if (options === void 0) { options = {}; }\n    var geom = {\n        type: \"MultiLineString\",\n        coordinates: coordinates,\n    };\n    return feature(geom, properties, options);\n}\n/**\n * Creates a {@link Feature<MultiPoint>} based on a\n * coordinate array. Properties can be added optionally.\n *\n * @name multiPoint\n * @param {Array<Array<number>>} coordinates an array of Positions\n * @param {Object} [properties={}] an Object of key-value pairs to add as properties\n * @param {Object} [options={}] Optional Parameters\n * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature\n * @param {string|number} [options.id] Identifier associated with the Feature\n * @returns {Feature<MultiPoint>} a MultiPoint feature\n * @throws {Error} if no coordinates are passed\n * @example\n * var multiPt = turf.multiPoint([[0,0],[10,10]]);\n *\n * //=multiPt\n */\nexport function multiPoint(coordinates, properties, options) {\n    if (options === void 0) { options = {}; }\n    var geom = {\n        type: \"MultiPoint\",\n        coordinates: coordinates,\n    };\n    return feature(geom, properties, options);\n}\n/**\n * Creates a {@link Feature<MultiPolygon>} based on a\n * coordinate array. Properties can be added optionally.\n *\n * @name multiPolygon\n * @param {Array<Array<Array<Array<number>>>>} coordinates an array of Polygons\n * @param {Object} [properties={}] an Object of key-value pairs to add as properties\n * @param {Object} [options={}] Optional Parameters\n * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature\n * @param {string|number} [options.id] Identifier associated with the Feature\n * @returns {Feature<MultiPolygon>} a multipolygon feature\n * @throws {Error} if no coordinates are passed\n * @example\n * var multiPoly = turf.multiPolygon([[[[0,0],[0,10],[10,10],[10,0],[0,0]]]]);\n *\n * //=multiPoly\n *\n */\nexport function multiPolygon(coordinates, properties, options) {\n    if (options === void 0) { options = {}; }\n    var geom = {\n        type: \"MultiPolygon\",\n        coordinates: coordinates,\n    };\n    return feature(geom, properties, options);\n}\n/**\n * Creates a {@link Feature<GeometryCollection>} based on a\n * coordinate array. Properties can be added optionally.\n *\n * @name geometryCollection\n * @param {Array<Geometry>} geometries an array of GeoJSON Geometries\n * @param {Object} [properties={}] an Object of key-value pairs to add as properties\n * @param {Object} [options={}] Optional Parameters\n * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature\n * @param {string|number} [options.id] Identifier associated with the Feature\n * @returns {Feature<GeometryCollection>} a GeoJSON GeometryCollection Feature\n * @example\n * var pt = turf.geometry(\"Point\", [100, 0]);\n * var line = turf.geometry(\"LineString\", [[101, 0], [102, 1]]);\n * var collection = turf.geometryCollection([pt, line]);\n *\n * // => collection\n */\nexport function geometryCollection(geometries, properties, options) {\n    if (options === void 0) { options = {}; }\n    var geom = {\n        type: \"GeometryCollection\",\n        geometries: geometries,\n    };\n    return feature(geom, properties, options);\n}\n/**\n * Round number to precision\n *\n * @param {number} num Number\n * @param {number} [precision=0] Precision\n * @returns {number} rounded number\n * @example\n * turf.round(120.4321)\n * //=120\n *\n * turf.round(120.4321, 2)\n * //=120.43\n */\nexport function round(num, precision) {\n    if (precision === void 0) { precision = 0; }\n    if (precision && !(precision >= 0)) {\n        throw new Error(\"precision must be a positive number\");\n    }\n    var multiplier = Math.pow(10, precision || 0);\n    return Math.round(num * multiplier) / multiplier;\n}\n/**\n * Convert a distance measurement (assuming a spherical Earth) from radians to a more friendly unit.\n * Valid units: miles, nauticalmiles, inches, yards, meters, metres, kilometers, centimeters, feet\n *\n * @name radiansToLength\n * @param {number} radians in radians across the sphere\n * @param {string} [units=\"kilometers\"] can be degrees, radians, miles, inches, yards, metres,\n * meters, kilometres, kilometers.\n * @returns {number} distance\n */\nexport function radiansToLength(radians, units) {\n    if (units === void 0) { units = \"kilometers\"; }\n    var factor = factors[units];\n    if (!factor) {\n        throw new Error(units + \" units is invalid\");\n    }\n    return radians * factor;\n}\n/**\n * Convert a distance measurement (assuming a spherical Earth) from a real-world unit into radians\n * Valid units: miles, nauticalmiles, inches, yards, meters, metres, kilometers, centimeters, feet\n *\n * @name lengthToRadians\n * @param {number} distance in real units\n * @param {string} [units=\"kilometers\"] can be degrees, radians, miles, inches, yards, metres,\n * meters, kilometres, kilometers.\n * @returns {number} radians\n */\nexport function lengthToRadians(distance, units) {\n    if (units === void 0) { units = \"kilometers\"; }\n    var factor = factors[units];\n    if (!factor) {\n        throw new Error(units + \" units is invalid\");\n    }\n    return distance / factor;\n}\n/**\n * Convert a distance measurement (assuming a spherical Earth) from a real-world unit into degrees\n * Valid units: miles, nauticalmiles, inches, yards, meters, metres, centimeters, kilometres, feet\n *\n * @name lengthToDegrees\n * @param {number} distance in real units\n * @param {string} [units=\"kilometers\"] can be degrees, radians, miles, inches, yards, metres,\n * meters, kilometres, kilometers.\n * @returns {number} degrees\n */\nexport function lengthToDegrees(distance, units) {\n    return radiansToDegrees(lengthToRadians(distance, units));\n}\n/**\n * Converts any bearing angle from the north line direction (positive clockwise)\n * and returns an angle between 0-360 degrees (positive clockwise), 0 being the north line\n *\n * @name bearingToAzimuth\n * @param {number} bearing angle, between -180 and +180 degrees\n * @returns {number} angle between 0 and 360 degrees\n */\nexport function bearingToAzimuth(bearing) {\n    var angle = bearing % 360;\n    if (angle < 0) {\n        angle += 360;\n    }\n    return angle;\n}\n/**\n * Converts an angle in radians to degrees\n *\n * @name radiansToDegrees\n * @param {number} radians angle in radians\n * @returns {number} degrees between 0 and 360 degrees\n */\nexport function radiansToDegrees(radians) {\n    var degrees = radians % (2 * Math.PI);\n    return (degrees * 180) / Math.PI;\n}\n/**\n * Converts an angle in degrees to radians\n *\n * @name degreesToRadians\n * @param {number} degrees angle between 0 and 360 degrees\n * @returns {number} angle in radians\n */\nexport function degreesToRadians(degrees) {\n    var radians = degrees % 360;\n    return (radians * Math.PI) / 180;\n}\n/**\n * Converts a length to the requested unit.\n * Valid units: miles, nauticalmiles, inches, yards, meters, metres, kilometers, centimeters, feet\n *\n * @param {number} length to be converted\n * @param {Units} [originalUnit=\"kilometers\"] of the length\n * @param {Units} [finalUnit=\"kilometers\"] returned unit\n * @returns {number} the converted length\n */\nexport function convertLength(length, originalUnit, finalUnit) {\n    if (originalUnit === void 0) { originalUnit = \"kilometers\"; }\n    if (finalUnit === void 0) { finalUnit = \"kilometers\"; }\n    if (!(length >= 0)) {\n        throw new Error(\"length must be a positive number\");\n    }\n    return radiansToLength(lengthToRadians(length, originalUnit), finalUnit);\n}\n/**\n * Converts a area to the requested unit.\n * Valid units: kilometers, kilometres, meters, metres, centimetres, millimeters, acres, miles, yards, feet, inches, hectares\n * @param {number} area to be converted\n * @param {Units} [originalUnit=\"meters\"] of the distance\n * @param {Units} [finalUnit=\"kilometers\"] returned unit\n * @returns {number} the converted area\n */\nexport function convertArea(area, originalUnit, finalUnit) {\n    if (originalUnit === void 0) { originalUnit = \"meters\"; }\n    if (finalUnit === void 0) { finalUnit = \"kilometers\"; }\n    if (!(area >= 0)) {\n        throw new Error(\"area must be a positive number\");\n    }\n    var startFactor = areaFactors[originalUnit];\n    if (!startFactor) {\n        throw new Error(\"invalid original units\");\n    }\n    var finalFactor = areaFactors[finalUnit];\n    if (!finalFactor) {\n        throw new Error(\"invalid final units\");\n    }\n    return (area / startFactor) * finalFactor;\n}\n/**\n * isNumber\n *\n * @param {*} num Number to validate\n * @returns {boolean} true/false\n * @example\n * turf.isNumber(123)\n * //=true\n * turf.isNumber('foo')\n * //=false\n */\nexport function isNumber(num) {\n    return !isNaN(num) && num !== null && !Array.isArray(num);\n}\n/**\n * isObject\n *\n * @param {*} input variable to validate\n * @returns {boolean} true/false\n * @example\n * turf.isObject({elevation: 10})\n * //=true\n * turf.isObject('foo')\n * //=false\n */\nexport function isObject(input) {\n    return !!input && input.constructor === Object;\n}\n/**\n * Validate BBox\n *\n * @private\n * @param {Array<number>} bbox BBox to validate\n * @returns {void}\n * @throws Error if BBox is not valid\n * @example\n * validateBBox([-180, -40, 110, 50])\n * //=OK\n * validateBBox([-180, -40])\n * //=Error\n * validateBBox('Foo')\n * //=Error\n * validateBBox(5)\n * //=Error\n * validateBBox(null)\n * //=Error\n * validateBBox(undefined)\n * //=Error\n */\nexport function validateBBox(bbox) {\n    if (!bbox) {\n        throw new Error(\"bbox is required\");\n    }\n    if (!Array.isArray(bbox)) {\n        throw new Error(\"bbox must be an Array\");\n    }\n    if (bbox.length !== 4 && bbox.length !== 6) {\n        throw new Error(\"bbox must be an Array of 4 or 6 numbers\");\n    }\n    bbox.forEach(function (num) {\n        if (!isNumber(num)) {\n            throw new Error(\"bbox must only contain numbers\");\n        }\n    });\n}\n/**\n * Validate Id\n *\n * @private\n * @param {string|number} id Id to validate\n * @returns {void}\n * @throws Error if Id is not valid\n * @example\n * validateId([-180, -40, 110, 50])\n * //=Error\n * validateId([-180, -40])\n * //=Error\n * validateId('Foo')\n * //=OK\n * validateId(5)\n * //=OK\n * validateId(null)\n * //=Error\n * validateId(undefined)\n * //=Error\n */\nexport function validateId(id) {\n    if (!id) {\n        throw new Error(\"id is required\");\n    }\n    if ([\"string\", \"number\"].indexOf(typeof id) === -1) {\n        throw new Error(\"id must be a number or a string\");\n    }\n}\n","import { isNumber, } from \"@turf/helpers\";\n/**\n * Unwrap a coordinate from a Point Feature, Geometry or a single coordinate.\n *\n * @name getCoord\n * @param {Array<number>|Geometry<Point>|Feature<Point>} coord GeoJSON Point or an Array of numbers\n * @returns {Array<number>} coordinates\n * @example\n * var pt = turf.point([10, 10]);\n *\n * var coord = turf.getCoord(pt);\n * //= [10, 10]\n */\nexport function getCoord(coord) {\n    if (!coord) {\n        throw new Error(\"coord is required\");\n    }\n    if (!Array.isArray(coord)) {\n        if (coord.type === \"Feature\" &&\n            coord.geometry !== null &&\n            coord.geometry.type === \"Point\") {\n            return coord.geometry.coordinates;\n        }\n        if (coord.type === \"Point\") {\n            return coord.coordinates;\n        }\n    }\n    if (Array.isArray(coord) &&\n        coord.length >= 2 &&\n        !Array.isArray(coord[0]) &&\n        !Array.isArray(coord[1])) {\n        return coord;\n    }\n    throw new Error(\"coord must be GeoJSON Point or an Array of numbers\");\n}\n/**\n * Unwrap coordinates from a Feature, Geometry Object or an Array\n *\n * @name getCoords\n * @param {Array<any>|Geometry|Feature} coords Feature, Geometry Object or an Array\n * @returns {Array<any>} coordinates\n * @example\n * var poly = turf.polygon([[[119.32, -8.7], [119.55, -8.69], [119.51, -8.54], [119.32, -8.7]]]);\n *\n * var coords = turf.getCoords(poly);\n * //= [[[119.32, -8.7], [119.55, -8.69], [119.51, -8.54], [119.32, -8.7]]]\n */\nexport function getCoords(coords) {\n    if (Array.isArray(coords)) {\n        return coords;\n    }\n    // Feature\n    if (coords.type === \"Feature\") {\n        if (coords.geometry !== null) {\n            return coords.geometry.coordinates;\n        }\n    }\n    else {\n        // Geometry\n        if (coords.coordinates) {\n            return coords.coordinates;\n        }\n    }\n    throw new Error(\"coords must be GeoJSON Feature, Geometry Object or an Array\");\n}\n/**\n * Checks if coordinates contains a number\n *\n * @name containsNumber\n * @param {Array<any>} coordinates GeoJSON Coordinates\n * @returns {boolean} true if Array contains a number\n */\nexport function containsNumber(coordinates) {\n    if (coordinates.length > 1 &&\n        isNumber(coordinates[0]) &&\n        isNumber(coordinates[1])) {\n        return true;\n    }\n    if (Array.isArray(coordinates[0]) && coordinates[0].length) {\n        return containsNumber(coordinates[0]);\n    }\n    throw new Error(\"coordinates must only contain numbers\");\n}\n/**\n * Enforce expectations about types of GeoJSON objects for Turf.\n *\n * @name geojsonType\n * @param {GeoJSON} value any GeoJSON object\n * @param {string} type expected GeoJSON type\n * @param {string} name name of calling function\n * @throws {Error} if value is not the expected type.\n */\nexport function geojsonType(value, type, name) {\n    if (!type || !name) {\n        throw new Error(\"type and name required\");\n    }\n    if (!value || value.type !== type) {\n        throw new Error(\"Invalid input to \" +\n            name +\n            \": must be a \" +\n            type +\n            \", given \" +\n            value.type);\n    }\n}\n/**\n * Enforce expectations about types of {@link Feature} inputs for Turf.\n * Internally this uses {@link geojsonType} to judge geometry types.\n *\n * @name featureOf\n * @param {Feature} feature a feature with an expected geometry type\n * @param {string} type expected GeoJSON type\n * @param {string} name name of calling function\n * @throws {Error} error if value is not the expected type.\n */\nexport function featureOf(feature, type, name) {\n    if (!feature) {\n        throw new Error(\"No feature passed\");\n    }\n    if (!name) {\n        throw new Error(\".featureOf() requires a name\");\n    }\n    if (!feature || feature.type !== \"Feature\" || !feature.geometry) {\n        throw new Error(\"Invalid input to \" + name + \", Feature with geometry required\");\n    }\n    if (!feature.geometry || feature.geometry.type !== type) {\n        throw new Error(\"Invalid input to \" +\n            name +\n            \": must be a \" +\n            type +\n            \", given \" +\n            feature.geometry.type);\n    }\n}\n/**\n * Enforce expectations about types of {@link FeatureCollection} inputs for Turf.\n * Internally this uses {@link geojsonType} to judge geometry types.\n *\n * @name collectionOf\n * @param {FeatureCollection} featureCollection a FeatureCollection for which features will be judged\n * @param {string} type expected GeoJSON type\n * @param {string} name name of calling function\n * @throws {Error} if value is not the expected type.\n */\nexport function collectionOf(featureCollection, type, name) {\n    if (!featureCollection) {\n        throw new Error(\"No featureCollection passed\");\n    }\n    if (!name) {\n        throw new Error(\".collectionOf() requires a name\");\n    }\n    if (!featureCollection || featureCollection.type !== \"FeatureCollection\") {\n        throw new Error(\"Invalid input to \" + name + \", FeatureCollection required\");\n    }\n    for (var _i = 0, _a = featureCollection.features; _i < _a.length; _i++) {\n        var feature = _a[_i];\n        if (!feature || feature.type !== \"Feature\" || !feature.geometry) {\n            throw new Error(\"Invalid input to \" + name + \", Feature with geometry required\");\n        }\n        if (!feature.geometry || feature.geometry.type !== type) {\n            throw new Error(\"Invalid input to \" +\n                name +\n                \": must be a \" +\n                type +\n                \", given \" +\n                feature.geometry.type);\n        }\n    }\n}\n/**\n * Get Geometry from Feature or Geometry Object\n *\n * @param {Feature|Geometry} geojson GeoJSON Feature or Geometry Object\n * @returns {Geometry|null} GeoJSON Geometry Object\n * @throws {Error} if geojson is not a Feature or Geometry Object\n * @example\n * var point = {\n *   \"type\": \"Feature\",\n *   \"properties\": {},\n *   \"geometry\": {\n *     \"type\": \"Point\",\n *     \"coordinates\": [110, 40]\n *   }\n * }\n * var geom = turf.getGeom(point)\n * //={\"type\": \"Point\", \"coordinates\": [110, 40]}\n */\nexport function getGeom(geojson) {\n    if (geojson.type === \"Feature\") {\n        return geojson.geometry;\n    }\n    return geojson;\n}\n/**\n * Get GeoJSON object's type, Geometry type is prioritize.\n *\n * @param {GeoJSON} geojson GeoJSON object\n * @param {string} [name=\"geojson\"] name of the variable to display in error message (unused)\n * @returns {string} GeoJSON type\n * @example\n * var point = {\n *   \"type\": \"Feature\",\n *   \"properties\": {},\n *   \"geometry\": {\n *     \"type\": \"Point\",\n *     \"coordinates\": [110, 40]\n *   }\n * }\n * var geom = turf.getType(point)\n * //=\"Point\"\n */\nexport function getType(geojson, _name) {\n    if (geojson.type === \"FeatureCollection\") {\n        return \"FeatureCollection\";\n    }\n    if (geojson.type === \"GeometryCollection\") {\n        return \"GeometryCollection\";\n    }\n    if (geojson.type === \"Feature\" && geojson.geometry !== null) {\n        return geojson.geometry.type;\n    }\n    return geojson.type;\n}\n"],"names":["from","to","options","coordinates1","coordinates2","dLat","dLon","lat1","lat2","a","Math","pow","sin","cos","atan2","sqrt","units","earthRadius","factors","centimeters","centimetres","degrees","feet","inches","kilometers","kilometres","meters","metres","miles","millimeters","millimetres","nauticalmiles","radians","yards","areaFactors","acres","hectares","feature","geom","properties","feat","type","id","bbox","geometry","point","coordinates","Error","Array","isArray","length","isNumber","polygon","_i","coordinates_1","ring","j","lineString","featureCollection","features","fc","multiPoint","multiPolygon","radiansToLength","factor","lengthToRadians","distance","degreesToRadians","PI","convertLength","originalUnit","finalUnit","convertArea","area","startFactor","finalFactor","num","isNaN","isObject","input","constructor","Object","getCoord","coord","getCoords","coords","featureOf","name","getGeom","geojson","getType","_name"],"sourceRoot":""}