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For instance, if you give this just a\n // Point geometry, then both loops are short-circuited and all we do\n // is gradually rename the input until it's called 'geometry'.\n //\n // This also aims to allocate as few resources as possible: just a\n // few numbers and booleans, rather than any temporary arrays as would\n // be required with the normalization approach.\n for (var featureIndex = 0; featureIndex < stop; featureIndex++) {\n geometryMaybeCollection = isFeatureCollection\n ? // @ts-expect-error: Known type conflict\n geojson.features[featureIndex].geometry\n : isFeature\n ? // @ts-expect-error: Known type conflict\n geojson.geometry\n : geojson;\n isGeometryCollection = geometryMaybeCollection\n ? geometryMaybeCollection.type === \"GeometryCollection\"\n : false;\n stopG = isGeometryCollection\n ? geometryMaybeCollection.geometries.length\n : 1;\n\n for (var geomIndex = 0; geomIndex < stopG; geomIndex++) {\n var multiFeatureIndex = 0;\n var geometryIndex = 0;\n geometry = isGeometryCollection\n ? geometryMaybeCollection.geometries[geomIndex]\n : geometryMaybeCollection;\n\n // Handles null Geometry -- Skips this geometry\n if (geometry === null) continue;\n coords = geometry.coordinates;\n var geomType = geometry.type;\n\n wrapShrink =\n excludeWrapCoord &&\n (geomType === \"Polygon\" || geomType === \"MultiPolygon\")\n ? 1\n : 0;\n\n switch (geomType) {\n case null:\n break;\n case \"Point\":\n if (\n // @ts-expect-error: Known type conflict\n callback(\n coords,\n coordIndex,\n featureIndex,\n multiFeatureIndex,\n geometryIndex\n ) === false\n )\n // @ts-expect-error: Known type conflict\n return false;\n coordIndex++;\n multiFeatureIndex++;\n break;\n case \"LineString\":\n case \"MultiPoint\":\n for (j = 0; j < coords.length; j++) {\n if (\n // @ts-expect-error: Known type conflict\n callback(\n coords[j],\n coordIndex,\n featureIndex,\n multiFeatureIndex,\n geometryIndex\n ) === false\n )\n // @ts-expect-error: Known type conflict\n return false;\n coordIndex++;\n if (geomType === \"MultiPoint\") multiFeatureIndex++;\n }\n if (geomType === \"LineString\") multiFeatureIndex++;\n break;\n case \"Polygon\":\n case \"MultiLineString\":\n for (j = 0; j < coords.length; j++) {\n for (k = 0; k < coords[j].length - wrapShrink; k++) {\n if (\n // @ts-expect-error: Known type conflict\n callback(\n coords[j][k],\n coordIndex,\n featureIndex,\n multiFeatureIndex,\n geometryIndex\n ) === false\n )\n // @ts-expect-error: Known type conflict\n return false;\n coordIndex++;\n }\n if (geomType === \"MultiLineString\") multiFeatureIndex++;\n if (geomType === \"Polygon\") geometryIndex++;\n }\n if (geomType === \"Polygon\") multiFeatureIndex++;\n break;\n case \"MultiPolygon\":\n for (j = 0; j < coords.length; j++) {\n geometryIndex = 0;\n for (k = 0; k < coords[j].length; k++) {\n for (l = 0; l < coords[j][k].length - wrapShrink; l++) {\n if (\n // @ts-expect-error: Known type conflict\n callback(\n coords[j][k][l],\n coordIndex,\n featureIndex,\n multiFeatureIndex,\n geometryIndex\n ) === false\n )\n // @ts-expect-error: Known type conflict\n return false;\n coordIndex++;\n }\n geometryIndex++;\n }\n multiFeatureIndex++;\n }\n break;\n case \"GeometryCollection\":\n for (j = 0; j < geometry.geometries.length; j++)\n if (\n // @ts-expect-error: Known type conflict\n coordEach(geometry.geometries[j], callback, excludeWrapCoord) ===\n false\n )\n // @ts-expect-error: Known type conflict\n return false;\n break;\n default:\n throw new Error(\"Unknown Geometry Type\");\n }\n }\n }\n}\n\n/**\n * Callback for coordReduce\n *\n * The first time the callback function is called, the values provided as arguments depend\n * on whether the reduce method has an initialValue argument.\n *\n * If an initialValue is provided to the reduce method:\n * - The previousValue argument is initialValue.\n * - The currentValue argument is the value of the first element present in the array.\n *\n * If an initialValue is not provided:\n * - The previousValue argument is the value of the first element present in the array.\n * - The currentValue argument is the value of the second element present in the array.\n *\n * @callback coordReduceCallback\n * @param {Reducer} previousValue The accumulated value previously returned in the last invocation\n * of the callback, or initialValue, if supplied.\n * @param {number[]} currentCoord The current coordinate being processed.\n * @param {number} coordIndex The current index of the coordinate being processed.\n * Starts at index 0, if an initialValue is provided, and at index 1 otherwise.\n * @param {number} featureIndex The current index of the Feature being processed.\n * @param {number} multiFeatureIndex The current index of the Multi-Feature being processed.\n * @param {number} geometryIndex The current index of the Geometry being processed.\n * @returns {Reducer}\n */\n\n/**\n * Reduce coordinates in any GeoJSON object, similar to Array.reduce()\n *\n * @function\n * @param {AllGeoJSON} geojson any GeoJSON object\n * @param {coordReduceCallback} callback a method that takes (previousValue, currentCoord, coordIndex)\n * @param {Reducer} [initialValue] Value to use as the first argument to the first call of the callback.\n * @param {boolean} [excludeWrapCoord=false] whether or not to include the final coordinate of LinearRings that wraps the ring in its iteration.\n * @returns {Reducer} The value that results from the reduction.\n * @example\n * var features = turf.featureCollection([\n * turf.point([26, 37], {\"foo\": \"bar\"}),\n * turf.point([36, 53], {\"hello\": \"world\"})\n * ]);\n *\n * turf.coordReduce(features, function (previousValue, currentCoord, coordIndex, featureIndex, multiFeatureIndex, geometryIndex) {\n * //=previousValue\n * //=currentCoord\n * //=coordIndex\n * //=featureIndex\n * //=multiFeatureIndex\n * //=geometryIndex\n * return currentCoord;\n * });\n */\nfunction coordReduce(\n geojson: AllGeoJSON,\n callback: (\n previousValue: Reducer,\n currentCoord: number[],\n coordIndex: number,\n featureIndex: number,\n multiFeatureIndex: number,\n geometryIndex: number\n ) => Reducer,\n initialValue?: Reducer,\n excludeWrapCoord?: boolean\n): Reducer {\n var previousValue = initialValue;\n coordEach(\n geojson,\n function (\n currentCoord,\n coordIndex,\n featureIndex,\n multiFeatureIndex,\n geometryIndex\n ) {\n if (coordIndex === 0 && initialValue === undefined)\n // @ts-expect-error: Known type conflict\n previousValue = currentCoord;\n else\n previousValue = callback(\n // @ts-expect-error: Known type conflict\n previousValue,\n currentCoord,\n coordIndex,\n featureIndex,\n multiFeatureIndex,\n geometryIndex\n );\n },\n excludeWrapCoord\n );\n // @ts-expect-error: Known type conflict\n return previousValue;\n}\n\n/**\n * Callback for propEach\n *\n * @callback propEachCallback\n * @param {GeoJsonProperties} currentProperties The current Properties being processed.\n * @param {number} featureIndex The current index of the Feature being processed.\n * @returns {void}\n */\n\n/**\n * Iterate over properties in any GeoJSON object, similar to Array.forEach()\n *\n * @function\n * @param {FeatureCollection|Feature} geojson any GeoJSON object\n * @param {propEachCallback} callback a method that takes (currentProperties, featureIndex)\n * @returns {void}\n * @example\n * var features = turf.featureCollection([\n * turf.point([26, 37], {foo: 'bar'}),\n * turf.point([36, 53], {hello: 'world'})\n * ]);\n *\n * turf.propEach(features, function (currentProperties, featureIndex) {\n * //=currentProperties\n * //=featureIndex\n * });\n */\nfunction propEach(\n geojson: Feature | FeatureCollection | Feature,\n callback: (currentProperties: Props, featureIndex: number) => void\n): void {\n var i;\n switch (geojson.type) {\n case \"FeatureCollection\":\n for (i = 0; i < geojson.features.length; i++) {\n // @ts-expect-error: Known type conflict\n if (callback(geojson.features[i].properties, i) === false) break;\n }\n break;\n case \"Feature\":\n // @ts-expect-error: Known type conflict\n callback(geojson.properties, 0);\n break;\n }\n}\n\n/**\n * Callback for propReduce\n *\n * The first time the callback function is called, the values provided as arguments depend\n * on whether the reduce method has an initialValue argument.\n *\n * If an initialValue is provided to the reduce method:\n * - The previousValue argument is initialValue.\n * - The currentValue argument is the value of the first element present in the array.\n *\n * If an initialValue is not provided:\n * - The previousValue argument is the value of the first element present in the array.\n * - The currentValue argument is the value of the second element present in the array.\n *\n * @callback propReduceCallback\n * @param {Reducer} previousValue The accumulated value previously returned in the last invocation\n * of the callback, or initialValue, if supplied.\n * @param {GeoJsonProperties} currentProperties The current Properties being processed.\n * @param {number} featureIndex The current index of the Feature being processed.\n * @returns {Reducer}\n */\n\n/**\n * Reduce properties in any GeoJSON object into a single value,\n * similar to how Array.reduce works. However, in this case we lazily run\n * the reduction, so an array of all properties is unnecessary.\n *\n * @function\n * @param {FeatureCollection|Feature|Geometry} geojson any GeoJSON object\n * @param {propReduceCallback} callback a method that takes (previousValue, currentProperties, featureIndex)\n * @param {Reducer} [initialValue] Value to use as the first argument to the first call of the callback.\n * @returns {Reducer} The value that results from the reduction.\n * @example\n * var features = turf.featureCollection([\n * turf.point([26, 37], {foo: 'bar'}),\n * turf.point([36, 53], {hello: 'world'})\n * ]);\n *\n * turf.propReduce(features, function (previousValue, currentProperties, featureIndex) {\n * //=previousValue\n * //=currentProperties\n * //=featureIndex\n * return currentProperties\n * });\n */\nfunction propReduce(\n geojson: Feature | FeatureCollection | Geometry,\n callback: (\n previousValue: Reducer,\n currentProperties: P,\n featureIndex: number\n ) => Reducer,\n initialValue?: Reducer\n): Reducer {\n var previousValue = initialValue;\n // @ts-expect-error: Known type conflict\n propEach(geojson, function (currentProperties, featureIndex) {\n if (featureIndex === 0 && initialValue === undefined)\n // @ts-expect-error: Known type conflict\n previousValue = currentProperties;\n else\n // @ts-expect-error: Known type conflict\n previousValue = callback(previousValue, currentProperties, featureIndex);\n });\n // @ts-expect-error: Known type conflict\n return previousValue;\n}\n\n/**\n * Callback for featureEach\n *\n * @callback featureEachCallback\n * @param {Feature} currentFeature The current Feature being processed.\n * @param {number} featureIndex The current index of the Feature being processed.\n * @returns {void}\n */\n\n/**\n * Iterate over features in any GeoJSON object, similar to\n * Array.forEach.\n *\n * @function\n * @param {FeatureCollection|Feature|Feature} geojson any GeoJSON object\n * @param {featureEachCallback} callback a method that takes (currentFeature, featureIndex)\n * @returns {void}\n * @example\n * var features = turf.featureCollection([\n * turf.point([26, 37], {foo: 'bar'}),\n * turf.point([36, 53], {hello: 'world'})\n * ]);\n *\n * turf.featureEach(features, function (currentFeature, featureIndex) {\n * //=currentFeature\n * //=featureIndex\n * });\n */\nfunction featureEach<\n G extends GeometryObject,\n P extends GeoJsonProperties = GeoJsonProperties,\n>(\n geojson:\n | Feature\n | FeatureCollection\n | Feature,\n callback: (currentFeature: Feature, featureIndex: number) => void\n): void {\n if (geojson.type === \"Feature\") {\n // @ts-expect-error: Known type conflict\n callback(geojson, 0);\n } else if (geojson.type === \"FeatureCollection\") {\n for (var i = 0; i < geojson.features.length; i++) {\n // @ts-expect-error: Known type conflict\n if (callback(geojson.features[i], i) === false) break;\n }\n }\n}\n\n/**\n * Callback for featureReduce\n *\n * The first time the callback function is called, the values provided as arguments depend\n * on whether the reduce method has an initialValue argument.\n *\n * If an initialValue is provided to the reduce method:\n * - The previousValue argument is initialValue.\n * - The currentValue argument is the value of the first element present in the array.\n *\n * If an initialValue is not provided:\n * - The previousValue argument is the value of the first element present in the array.\n * - The currentValue argument is the value of the second element present in the array.\n *\n * @callback featureReduceCallback\n * @param {Reducer} previousValue The accumulated value previously returned in the last invocation\n * of the callback, or initialValue, if supplied.\n * @param {Feature} currentFeature The current Feature being processed.\n * @param {number} featureIndex The current index of the Feature being processed.\n * @returns {Reducer}\n */\n\n/**\n * Reduce features in any GeoJSON object, similar to Array.reduce().\n *\n * @function\n * @param {FeatureCollection|Feature|Feature} geojson any GeoJSON object\n * @param {featureReduceCallback} callback a method that takes (previousValue, currentFeature, featureIndex)\n * @param {Reducer} [initialValue] Value to use as the first argument to the first call of the callback.\n * @returns {Reducer} The value that results from the reduction.\n * @example\n * var features = turf.featureCollection([\n * turf.point([26, 37], {\"foo\": \"bar\"}),\n * turf.point([36, 53], {\"hello\": \"world\"})\n * ]);\n *\n * turf.featureReduce(features, function (previousValue, currentFeature, featureIndex) {\n * //=previousValue\n * //=currentFeature\n * //=featureIndex\n * return currentFeature\n * });\n */\nfunction featureReduce<\n Reducer,\n G extends GeometryObject,\n P extends GeoJsonProperties = GeoJsonProperties,\n>(\n geojson:\n | Feature\n | FeatureCollection\n | Feature,\n callback: (\n previousValue: Reducer,\n currentFeature: Feature,\n featureIndex: number\n ) => Reducer,\n initialValue?: Reducer\n): Reducer {\n var previousValue = initialValue;\n featureEach(geojson, function (currentFeature, featureIndex) {\n if (featureIndex === 0 && initialValue === undefined)\n // @ts-expect-error: Known type conflict\n previousValue = currentFeature;\n // @ts-expect-error: Known type conflict\n else previousValue = callback(previousValue, currentFeature, featureIndex);\n });\n // @ts-expect-error: Known type conflict\n return previousValue;\n}\n\n/**\n * Get all coordinates from any GeoJSON object.\n *\n * @function\n * @param {AllGeoJSON} geojson any GeoJSON object\n * @returns {Array>} coordinate position array\n * @example\n * var features = turf.featureCollection([\n * turf.point([26, 37], {foo: 'bar'}),\n * turf.point([36, 53], {hello: 'world'})\n * ]);\n *\n * var coords = turf.coordAll(features);\n * //= [[26, 37], [36, 53]]\n */\nfunction coordAll(geojson: AllGeoJSON): number[][] {\n // @ts-expect-error: Known type conflict\n var coords = [];\n coordEach(geojson, function (coord) {\n coords.push(coord);\n });\n // @ts-expect-error: Known type conflict\n return coords;\n}\n\n/**\n * Callback for geomEach\n *\n * @callback geomEachCallback\n * @param {GeometryObject} currentGeometry The current Geometry being processed.\n * @param {number} featureIndex The current index of the Feature being processed.\n * @param {GeoJsonProperties} featureProperties The current Feature Properties being processed.\n * @param {BBox} featureBBox The current Feature BBox being processed.\n * @param {Id} featureId The current Feature Id being processed.\n * @returns {void}\n */\n\n/**\n * Iterate over each geometry in any GeoJSON object, similar to Array.forEach()\n *\n * @function\n * @param {FeatureCollection|Feature|Geometry|GeometryObject|Feature} geojson any GeoJSON object\n * @param {geomEachCallback} callback a method that takes (currentGeometry, featureIndex, featureProperties, featureBBox, featureId)\n * @returns {void}\n * @example\n * var features = turf.featureCollection([\n * turf.point([26, 37], {foo: 'bar'}),\n * turf.point([36, 53], {hello: 'world'})\n * ]);\n *\n * turf.geomEach(features, function (currentGeometry, featureIndex, featureProperties, featureBBox, featureId) {\n * //=currentGeometry\n * //=featureIndex\n * //=featureProperties\n * //=featureBBox\n * //=featureId\n * });\n */\nfunction geomEach<\n G extends GeometryObject | null,\n P extends GeoJsonProperties = GeoJsonProperties,\n>(\n geojson:\n | Feature\n | FeatureCollection\n | G\n | GeometryCollection\n | Feature,\n callback: (\n currentGeometry: G,\n featureIndex: number,\n featureProperties: P,\n featureBBox: BBox,\n featureId: Id\n ) => void\n): void {\n var i,\n j,\n g,\n geometry,\n stopG,\n geometryMaybeCollection,\n isGeometryCollection,\n featureProperties,\n featureBBox,\n featureId,\n featureIndex = 0,\n // @ts-expect-error: Known type conflict\n isFeatureCollection = geojson.type === \"FeatureCollection\",\n // @ts-expect-error: Known type conflict\n isFeature = geojson.type === \"Feature\",\n // @ts-expect-error: Known type conflict\n stop = isFeatureCollection ? geojson.features.length : 1;\n\n // This logic may look a little weird. The reason why it is that way\n // is because it's trying to be fast. GeoJSON supports multiple kinds\n // of objects at its root: FeatureCollection, Features, Geometries.\n // This function has the responsibility of handling all of them, and that\n // means that some of the `for` loops you see below actually just don't apply\n // to certain inputs. For instance, if you give this just a\n // Point geometry, then both loops are short-circuited and all we do\n // is gradually rename the input until it's called 'geometry'.\n //\n // This also aims to allocate as few resources as possible: just a\n // few numbers and booleans, rather than any temporary arrays as would\n // be required with the normalization approach.\n for (i = 0; i < stop; i++) {\n geometryMaybeCollection = isFeatureCollection\n ? // @ts-expect-error: Known type conflict\n geojson.features[i].geometry\n : isFeature\n ? // @ts-expect-error: Known type conflict\n geojson.geometry\n : geojson;\n featureProperties = isFeatureCollection\n ? // @ts-expect-error: Known type conflict\n geojson.features[i].properties\n : isFeature\n ? // @ts-expect-error: Known type conflict\n geojson.properties\n : {};\n featureBBox = isFeatureCollection\n ? // @ts-expect-error: Known type conflict\n geojson.features[i].bbox\n : isFeature\n ? // @ts-expect-error: Known type conflict\n geojson.bbox\n : undefined;\n featureId = isFeatureCollection\n ? // @ts-expect-error: Known type conflict\n geojson.features[i].id\n : isFeature\n ? // @ts-expect-error: Known type conflict\n geojson.id\n : undefined;\n isGeometryCollection = geometryMaybeCollection\n ? geometryMaybeCollection.type === \"GeometryCollection\"\n : false;\n stopG = isGeometryCollection\n ? geometryMaybeCollection.geometries.length\n : 1;\n\n for (g = 0; g < stopG; g++) {\n geometry = isGeometryCollection\n ? geometryMaybeCollection.geometries[g]\n : geometryMaybeCollection;\n\n // Handle null Geometry\n if (geometry === null) {\n if (\n // @ts-expect-error: Known type conflict\n callback(\n // @ts-expect-error: Known type conflict\n null,\n featureIndex,\n featureProperties,\n featureBBox,\n featureId\n ) === false\n )\n // @ts-expect-error: Known type conflict\n return false;\n continue;\n }\n switch (geometry.type) {\n case \"Point\":\n case \"LineString\":\n case \"MultiPoint\":\n case \"Polygon\":\n case \"MultiLineString\":\n case \"MultiPolygon\": {\n if (\n // @ts-expect-error: Known type conflict\n callback(\n geometry,\n featureIndex,\n featureProperties,\n featureBBox,\n featureId\n ) === false\n )\n // @ts-expect-error: Known type conflict\n return false;\n break;\n }\n case \"GeometryCollection\": {\n for (j = 0; j < geometry.geometries.length; j++) {\n if (\n // @ts-expect-error: Known type conflict\n callback(\n geometry.geometries[j],\n featureIndex,\n featureProperties,\n featureBBox,\n featureId\n ) === false\n )\n // @ts-expect-error: Known type conflict\n return false;\n }\n break;\n }\n default:\n throw new Error(\"Unknown Geometry Type\");\n }\n }\n // Only increase `featureIndex` per each feature\n featureIndex++;\n }\n}\n\n/**\n * Callback for geomReduce\n *\n * The first time the callback function is called, the values provided as arguments depend\n * on whether the reduce method has an initialValue argument.\n *\n * If an initialValue is provided to the reduce method:\n * - The previousValue argument is initialValue.\n * - The currentValue argument is the value of the first element present in the array.\n *\n * If an initialValue is not provided:\n * - The previousValue argument is the value of the first element present in the array.\n * - The currentValue argument is the value of the second element present in the array.\n *\n * @callback geomReduceCallback\n * @param {Reducer} previousValue The accumulated value previously returned in the last invocation\n * of the callback, or initialValue, if supplied.\n * @param {GeometryObject} currentGeometry The current Geometry being processed.\n * @param {number} featureIndex The current index of the Feature being processed.\n * @param {GeoJsonProperties} featureProperties The current Feature Properties being processed.\n * @param {BBox} featureBBox The current Feature BBox being processed.\n * @param {Id} featureId The current Feature Id being processed.\n * @returns {Reducer}\n */\n\n/**\n * Reduce geometry in any GeoJSON object, similar to Array.reduce().\n *\n * @function\n * @param {FeatureCollection|Feature|GeometryObject|GeometryCollection|Feature} geojson any GeoJSON object\n * @param {geomReduceCallback} callback a method that takes (previousValue, currentGeometry, featureIndex, featureProperties, featureBBox, featureId)\n * @param {Reducer} [initialValue] Value to use as the first argument to the first call of the callback.\n * @returns {Reducer} The value that results from the reduction.\n * @example\n * var features = turf.featureCollection([\n * turf.point([26, 37], {foo: 'bar'}),\n * turf.point([36, 53], {hello: 'world'})\n * ]);\n *\n * turf.geomReduce(features, function (previousValue, currentGeometry, featureIndex, featureProperties, featureBBox, featureId) {\n * //=previousValue\n * //=currentGeometry\n * //=featureIndex\n * //=featureProperties\n * //=featureBBox\n * //=featureId\n * return currentGeometry\n * });\n */\nfunction geomReduce<\n Reducer,\n G extends GeometryObject,\n P extends GeoJsonProperties = GeoJsonProperties,\n>(\n geojson:\n | Feature\n | FeatureCollection\n | G\n | GeometryCollection\n | Feature,\n callback: (\n previousValue: Reducer,\n currentGeometry: G,\n featureIndex: number,\n featureProperties: P,\n featureBBox: BBox,\n featureId: Id\n ) => Reducer,\n initialValue?: Reducer\n): Reducer {\n var previousValue = initialValue;\n geomEach(\n geojson,\n function (\n currentGeometry,\n featureIndex,\n featureProperties,\n featureBBox,\n featureId\n ) {\n if (featureIndex === 0 && initialValue === undefined)\n // @ts-expect-error: Known type conflict\n previousValue = currentGeometry;\n else\n previousValue = callback(\n // @ts-expect-error: Known type conflict\n previousValue,\n currentGeometry,\n featureIndex,\n featureProperties,\n featureBBox,\n featureId\n );\n }\n );\n // @ts-expect-error: Known type conflict\n return previousValue;\n}\n\n/**\n * Callback for flattenEach\n *\n * @callback flattenEachCallback\n * @param {Feature} currentFeature The current flattened feature being processed.\n * @param {number} featureIndex The current index of the Feature being processed.\n * @param {number} multiFeatureIndex The current index of the Multi-Feature being processed.\n * @returns {void}\n */\n\n/**\n * Iterate over flattened features in any GeoJSON object, similar to\n * Array.forEach.\n *\n * @function\n * @param {FeatureCollection|Feature|GeometryObject|GeometryCollection|Feature} geojson any GeoJSON object\n * @param {flattenEachCallback} callback a method that takes (currentFeature, featureIndex, multiFeatureIndex)\n * @returns {void}\n * @example\n * var features = turf.featureCollection([\n * turf.point([26, 37], {foo: 'bar'}),\n * turf.multiPoint([[40, 30], [36, 53]], {hello: 'world'})\n * ]);\n *\n * turf.flattenEach(features, function (currentFeature, featureIndex, multiFeatureIndex) {\n * //=currentFeature\n * //=featureIndex\n * //=multiFeatureIndex\n * });\n */\nfunction flattenEach<\n G extends GeometryObject = GeometryObject,\n P extends GeoJsonProperties = GeoJsonProperties,\n>(\n geojson:\n | Feature\n | FeatureCollection\n | G\n | GeometryCollection\n | Feature,\n callback: (\n currentFeature: Feature,\n featureIndex: number,\n multiFeatureIndex: number\n ) => void\n): void {\n geomEach(geojson, function (geometry, featureIndex, properties, bbox, id) {\n // Callback for single geometry\n var type = geometry === null ? null : geometry.type;\n switch (type) {\n case null:\n case \"Point\":\n case \"LineString\":\n case \"Polygon\":\n if (\n // @ts-expect-error: Known type conflict\n callback(\n feature(geometry, properties, { bbox: bbox, id: id }),\n featureIndex,\n 0\n ) === false\n )\n return false;\n return;\n }\n\n var geomType;\n\n // Callback for multi-geometry\n switch (type) {\n case \"MultiPoint\":\n geomType = \"Point\";\n break;\n case \"MultiLineString\":\n geomType = \"LineString\";\n break;\n case \"MultiPolygon\":\n geomType = \"Polygon\";\n break;\n }\n\n for (\n var multiFeatureIndex = 0;\n // @ts-expect-error: Known type conflict\n multiFeatureIndex < geometry.coordinates.length;\n multiFeatureIndex++\n ) {\n // @ts-expect-error: Known type conflict\n var coordinate = geometry.coordinates[multiFeatureIndex];\n var geom = {\n type: geomType,\n coordinates: coordinate,\n };\n if (\n // @ts-expect-error: Known type conflict\n callback(feature(geom, properties), featureIndex, multiFeatureIndex) ===\n false\n )\n return false;\n }\n });\n}\n\n/**\n * Callback for flattenReduce\n *\n * The first time the callback function is called, the values provided as arguments depend\n * on whether the reduce method has an initialValue argument.\n *\n * If an initialValue is provided to the reduce method:\n * - The previousValue argument is initialValue.\n * - The currentValue argument is the value of the first element present in the array.\n *\n * If an initialValue is not provided:\n * - The previousValue argument is the value of the first element present in the array.\n * - The currentValue argument is the value of the second element present in the array.\n *\n * @callback flattenReduceCallback\n * @param {Reducer} previousValue The accumulated value previously returned in the last invocation\n * of the callback, or initialValue, if supplied.\n * @param {Feature} currentFeature The current Feature being processed.\n * @param {number} featureIndex The current index of the Feature being processed.\n * @param {number} multiFeatureIndex The current index of the Multi-Feature being processed.\n * @returns {Reducer}\n */\n\n/**\n * Reduce flattened features in any GeoJSON object, similar to Array.reduce().\n *\n * @function\n * @param {FeatureCollection|Feature|GeometryObject|GeometryCollection|Feature} geojson any GeoJSON object\n * @param {flattenReduceCallback} callback a method that takes (previousValue, currentFeature, featureIndex, multiFeatureIndex)\n * @param {Reducer} [initialValue] Value to use as the first argument to the first call of the callback.\n * @returns {Reducer} The value that results from the reduction.\n * @example\n * var features = turf.featureCollection([\n * turf.point([26, 37], {foo: 'bar'}),\n * turf.multiPoint([[40, 30], [36, 53]], {hello: 'world'})\n * ]);\n *\n * turf.flattenReduce(features, function (previousValue, currentFeature, featureIndex, multiFeatureIndex) {\n * //=previousValue\n * //=currentFeature\n * //=featureIndex\n * //=multiFeatureIndex\n * return currentFeature\n * });\n */\nfunction flattenReduce<\n Reducer,\n G extends GeometryObject,\n P extends GeoJsonProperties = GeoJsonProperties,\n>(\n geojson:\n | Feature\n | FeatureCollection\n | G\n | GeometryCollection\n | Feature,\n callback: (\n previousValue: Reducer,\n currentFeature: Feature,\n featureIndex: number,\n multiFeatureIndex: number\n ) => Reducer,\n initialValue?: Reducer\n): Reducer {\n var previousValue = initialValue;\n flattenEach(\n geojson,\n function (currentFeature, featureIndex, multiFeatureIndex) {\n if (\n featureIndex === 0 &&\n multiFeatureIndex === 0 &&\n initialValue === undefined\n )\n // @ts-expect-error: Known type conflict\n previousValue = currentFeature;\n else\n previousValue = callback(\n // @ts-expect-error: Known type conflict\n previousValue,\n currentFeature,\n featureIndex,\n multiFeatureIndex\n );\n }\n );\n // @ts-expect-error: Known type conflict\n return previousValue;\n}\n\n/**\n * Callback for segmentEach\n *\n * @callback segmentEachCallback\n * @param {Feature} currentSegment The current Segment being processed.\n * @param {number} featureIndex The current index of the Feature being processed.\n * @param {number} multiFeatureIndex The current index of the Multi-Feature being processed.\n * @param {number} geometryIndex The current index of the Geometry being processed.\n * @param {number} segmentIndex The current index of the Segment being processed.\n * @returns {void}\n */\n\n/**\n * Iterate over 2-vertex line segment in any GeoJSON object, similar to Array.forEach()\n * (Multi)Point geometries do not contain segments therefore they are ignored during this operation.\n *\n * @param {AllGeoJSON} geojson any GeoJSON\n * @param {segmentEachCallback} callback a method that takes (currentSegment, featureIndex, multiFeatureIndex, geometryIndex, segmentIndex)\n * @returns {void}\n * @example\n * var polygon = turf.polygon([[[-50, 5], [-40, -10], [-50, -10], [-40, 5], [-50, 5]]]);\n *\n * // Iterate over GeoJSON by 2-vertex segments\n * turf.segmentEach(polygon, function (currentSegment, featureIndex, multiFeatureIndex, geometryIndex, segmentIndex) {\n * //=currentSegment\n * //=featureIndex\n * //=multiFeatureIndex\n * //=geometryIndex\n * //=segmentIndex\n * });\n *\n * // Calculate the total number of segments\n * var total = 0;\n * turf.segmentEach(polygon, function () {\n * total++;\n * });\n */\nfunction segmentEach

(\n geojson: AllGeoJSON,\n callback: (\n currentSegment?: Feature,\n featureIndex?: number,\n multiFeatureIndex?: number,\n segmentIndex?: number,\n geometryIndex?: number\n ) => void\n): void {\n flattenEach(geojson, function (feature, featureIndex, multiFeatureIndex) {\n var segmentIndex = 0;\n\n // Exclude null Geometries\n if (!feature.geometry) return;\n // (Multi)Point geometries do not contain segments therefore they are ignored during this operation.\n var type = feature.geometry.type;\n if (type === \"Point\" || type === \"MultiPoint\") return;\n\n // Generate 2-vertex line segments\n // @ts-expect-error: Known type conflict\n var previousCoords;\n var previousFeatureIndex = 0;\n var previousMultiIndex = 0;\n var prevGeomIndex = 0;\n if (\n // @ts-expect-error: Known type conflict\n coordEach(\n feature,\n function (\n currentCoord,\n coordIndex,\n featureIndexCoord,\n multiPartIndexCoord,\n geometryIndex\n ) {\n // Simulating a meta.coordReduce() since `reduce` operations cannot be stopped by returning `false`\n if (\n // @ts-expect-error: Known type conflict\n previousCoords === undefined ||\n featureIndex > previousFeatureIndex ||\n multiPartIndexCoord > previousMultiIndex ||\n geometryIndex > prevGeomIndex\n ) {\n previousCoords = currentCoord;\n previousFeatureIndex = featureIndex;\n previousMultiIndex = multiPartIndexCoord;\n prevGeomIndex = geometryIndex;\n segmentIndex = 0;\n return;\n }\n var currentSegment = lineString(\n // @ts-expect-error: Known type conflict\n [previousCoords, currentCoord],\n feature.properties\n );\n if (\n // @ts-expect-error: Known type conflict\n callback(\n // @ts-expect-error: Known type conflict\n currentSegment,\n featureIndex,\n multiFeatureIndex,\n geometryIndex,\n segmentIndex\n ) === false\n )\n return false;\n segmentIndex++;\n previousCoords = currentCoord;\n }\n ) === false\n )\n return false;\n });\n}\n\n/**\n * Callback for segmentReduce\n *\n * The first time the callback function is called, the values provided as arguments depend\n * on whether the reduce method has an initialValue argument.\n *\n * If an initialValue is provided to the reduce method:\n * - The previousValue argument is initialValue.\n * - The currentValue argument is the value of the first element present in the array.\n *\n * If an initialValue is not provided:\n * - The previousValue argument is the value of the first element present in the array.\n * - The currentValue argument is the value of the second element present in the array.\n *\n * @callback segmentReduceCallback\n * @param {Reducer} previousValue The accumulated value previously returned in the last invocation\n * of the callback, or initialValue, if supplied.\n * @param {Feature} currentSegment The current Segment being processed.\n * @param {number} featureIndex The current index of the Feature being processed.\n * @param {number} multiFeatureIndex The current index of the Multi-Feature being processed.\n * @param {number} geometryIndex The current index of the Geometry being processed.\n * @param {number} segmentIndex The current index of the Segment being processed.\n * @returns {Reducer}\n */\n\n/**\n * Reduce 2-vertex line segment in any GeoJSON object, similar to Array.reduce()\n * (Multi)Point geometries do not contain segments therefore they are ignored during this operation.\n *\n * @param {FeatureCollection|Feature|Geometry} geojson any GeoJSON\n * @param {segmentReduceCallback} callback a method that takes (previousValue, currentSegment, currentIndex)\n * @param {Reducer} [initialValue] Value to use as the first argument to the first call of the callback.\n * @returns {Reducer}\n * @example\n * var polygon = turf.polygon([[[-50, 5], [-40, -10], [-50, -10], [-40, 5], [-50, 5]]]);\n *\n * // Iterate over GeoJSON by 2-vertex segments\n * turf.segmentReduce(polygon, function (previousSegment, currentSegment, featureIndex, multiFeatureIndex, geometryIndex, segmentIndex) {\n * //= previousSegment\n * //= currentSegment\n * //= featureIndex\n * //= multiFeatureIndex\n * //= geometryIndex\n * //= segmentIndex\n * return currentSegment\n * });\n *\n * // Calculate the total number of segments\n * var initialValue = 0\n * var total = turf.segmentReduce(polygon, function (previousValue) {\n * previousValue++;\n * return previousValue;\n * }, initialValue);\n */\nfunction segmentReduce<\n Reducer,\n P extends GeoJsonProperties = GeoJsonProperties,\n>(\n geojson:\n | FeatureCollection\n | Feature\n | Lines\n | Feature\n | GeometryCollection,\n callback: (\n previousValue?: Reducer,\n currentSegment?: Feature,\n featureIndex?: number,\n multiFeatureIndex?: number,\n segmentIndex?: number,\n geometryIndex?: number\n ) => Reducer,\n initialValue?: Reducer\n): Reducer {\n var previousValue = initialValue;\n var started = false;\n segmentEach(\n geojson,\n function (\n currentSegment,\n featureIndex,\n multiFeatureIndex,\n geometryIndex,\n segmentIndex\n ) {\n if (started === false && initialValue === undefined)\n // @ts-expect-error: Known type conflict\n previousValue = currentSegment;\n else\n previousValue = callback(\n previousValue,\n // @ts-expect-error: Known type conflict\n currentSegment,\n featureIndex,\n multiFeatureIndex,\n geometryIndex,\n segmentIndex\n );\n started = true;\n }\n );\n // @ts-expect-error: Known type conflict\n return previousValue;\n}\n\n/**\n * Callback for lineEach\n *\n * @callback lineEachCallback\n * @param {Feature} currentLine The current LineString|LinearRing being processed\n * @param {number} featureIndex The current index of the Feature being processed\n * @param {number} multiFeatureIndex The current index of the Multi-Feature being processed\n * @param {number} geometryIndex The current index of the Geometry being processed\n * @returns {void}\n */\n\n/**\n * Iterate over line or ring coordinates in LineString, Polygon, MultiLineString, MultiPolygon Features or Geometries,\n * similar to Array.forEach.\n *\n * @function\n * @param {FeatureCollection|Feature|Lines|Feature|GeometryCollection} geojson object\n * @param {lineEachCallback} callback a method that takes (currentLine, featureIndex, multiFeatureIndex, geometryIndex)\n * @returns {void}\n * @example\n * var multiLine = turf.multiLineString([\n * [[26, 37], [35, 45]],\n * [[36, 53], [38, 50], [41, 55]]\n * ]);\n *\n * turf.lineEach(multiLine, function (currentLine, featureIndex, multiFeatureIndex, geometryIndex) {\n * //=currentLine\n * //=featureIndex\n * //=multiFeatureIndex\n * //=geometryIndex\n * });\n */\nfunction lineEach

(\n geojson:\n | FeatureCollection\n | Feature\n | Lines\n | Feature\n | GeometryCollection,\n callback: (\n currentLine: Feature,\n featureIndex?: number,\n multiFeatureIndex?: number,\n geometryIndex?: number\n ) => void\n): void {\n // validation\n if (!geojson) throw new Error(\"geojson is required\");\n\n flattenEach(geojson, function (feature, featureIndex, multiFeatureIndex) {\n if (feature.geometry === null) return;\n var type = feature.geometry.type;\n var coords = feature.geometry.coordinates;\n switch (type) {\n case \"LineString\":\n // @ts-expect-error: Known type conflict\n if (callback(feature, featureIndex, multiFeatureIndex, 0, 0) === false)\n return false;\n break;\n case \"Polygon\":\n for (\n var geometryIndex = 0;\n geometryIndex < coords.length;\n geometryIndex++\n ) {\n if (\n // @ts-expect-error: Known type conflict\n callback(\n // @ts-expect-error: Known type conflict\n lineString(coords[geometryIndex], feature.properties),\n featureIndex,\n multiFeatureIndex,\n geometryIndex\n ) === false\n )\n return false;\n }\n break;\n }\n });\n}\n\n/**\n * Callback for lineReduce\n *\n * The first time the callback function is called, the values provided as arguments depend\n * on whether the reduce method has an initialValue argument.\n *\n * If an initialValue is provided to the reduce method:\n * - The previousValue argument is initialValue.\n * - The currentValue argument is the value of the first element present in the array.\n *\n * If an initialValue is not provided:\n * - The previousValue argument is the value of the first element present in the array.\n * - The currentValue argument is the value of the second element present in the array.\n *\n * @callback lineReduceCallback\n * @param {Reducer} previousValue The accumulated value previously returned in the last invocation\n * of the callback, or initialValue, if supplied.\n * @param {Feature} currentLine The current LineString|LinearRing being processed.\n * @param {number} featureIndex The current index of the Feature being processed\n * @param {number} multiFeatureIndex The current index of the Multi-Feature being processed\n * @param {number} geometryIndex The current index of the Geometry being processed\n * @returns {Reducer}\n */\n\n/**\n * Reduce features in any GeoJSON object, similar to Array.reduce().\n *\n * @function\n * @param {FeatureCollection|Feature|Lines|Feature|GeometryCollection} geojson object\n * @param {Function} callback a method that takes (previousValue, currentLine, featureIndex, multiFeatureIndex, geometryIndex)\n * @param {Reducer} [initialValue] Value to use as the first argument to the first call of the callback.\n * @returns {Reducer} The value that results from the reduction.\n * @example\n * var multiPoly = turf.multiPolygon([\n * turf.polygon([[[12,48],[2,41],[24,38],[12,48]], [[9,44],[13,41],[13,45],[9,44]]]),\n * turf.polygon([[[5, 5], [0, 0], [2, 2], [4, 4], [5, 5]]])\n * ]);\n *\n * turf.lineReduce(multiPoly, function (previousValue, currentLine, featureIndex, multiFeatureIndex, geometryIndex) {\n * //=previousValue\n * //=currentLine\n * //=featureIndex\n * //=multiFeatureIndex\n * //=geometryIndex\n * return currentLine\n * });\n */\nfunction lineReduce(\n geojson:\n | FeatureCollection\n | Feature\n | Lines\n | Feature\n | GeometryCollection,\n callback: (\n previousValue?: Reducer,\n currentLine?: Feature,\n featureIndex?: number,\n multiFeatureIndex?: number,\n geometryIndex?: number\n ) => Reducer,\n initialValue?: Reducer\n): Reducer {\n var previousValue = initialValue;\n lineEach(\n geojson,\n function (currentLine, featureIndex, multiFeatureIndex, geometryIndex) {\n if (featureIndex === 0 && initialValue === undefined)\n // @ts-expect-error: Known type conflict\n previousValue = currentLine;\n else\n previousValue = callback(\n previousValue,\n currentLine,\n featureIndex,\n multiFeatureIndex,\n geometryIndex\n );\n }\n );\n // @ts-expect-error: Known type conflict\n return previousValue;\n}\n\n/**\n * Finds a particular 2-vertex LineString Segment from a GeoJSON using `@turf/meta` indexes.\n *\n * Negative indexes are permitted.\n * Point & MultiPoint will always return null.\n *\n * @param {FeatureCollection|Feature|Geometry} geojson Any GeoJSON Feature or Geometry\n * @param {Object} [options={}] Optional parameters\n * @param {number} [options.featureIndex=0] Feature Index\n * @param {number} [options.multiFeatureIndex=0] Multi-Feature Index\n * @param {number} [options.geometryIndex=0] Geometry Index\n * @param {number} [options.segmentIndex=0] Segment Index\n * @param {Object} [options.properties={}] Translate Properties to output LineString\n * @param {BBox} [options.bbox={}] Translate BBox to output LineString\n * @param {number|string} [options.id={}] Translate Id to output LineString\n * @returns {Feature} 2-vertex GeoJSON Feature LineString\n * @example\n * var multiLine = turf.multiLineString([\n * [[10, 10], [50, 30], [30, 40]],\n * [[-10, -10], [-50, -30], [-30, -40]]\n * ]);\n *\n * // First Segment (defaults are 0)\n * turf.findSegment(multiLine);\n * // => Feature>\n *\n * // First Segment of 2nd Multi Feature\n * turf.findSegment(multiLine, {multiFeatureIndex: 1});\n * // => Feature>\n *\n * // Last Segment of Last Multi Feature\n * turf.findSegment(multiLine, {multiFeatureIndex: -1, segmentIndex: -1});\n * // => Feature>\n */\nfunction findSegment<\n G extends LineString | MultiLineString | Polygon | MultiPolygon,\n P extends GeoJsonProperties = GeoJsonProperties,\n>(\n geojson: Feature | FeatureCollection | G,\n options?: {\n featureIndex?: number;\n multiFeatureIndex?: number;\n geometryIndex?: number;\n segmentIndex?: number;\n properties?: P;\n bbox?: BBox;\n id?: Id;\n }\n): Feature {\n // Optional Parameters\n options = options || {};\n if (!isObject(options)) throw new Error(\"options is invalid\");\n var featureIndex = options.featureIndex || 0;\n var multiFeatureIndex = options.multiFeatureIndex || 0;\n var geometryIndex = options.geometryIndex || 0;\n var segmentIndex = options.segmentIndex || 0;\n\n // Find FeatureIndex\n var properties = options.properties;\n var geometry;\n\n switch (geojson.type) {\n case \"FeatureCollection\":\n if (featureIndex < 0)\n featureIndex = geojson.features.length + featureIndex;\n properties = properties || geojson.features[featureIndex].properties;\n geometry = geojson.features[featureIndex].geometry;\n break;\n case \"Feature\":\n properties = properties || geojson.properties;\n geometry = geojson.geometry;\n break;\n case \"Point\" as GeoJsonTypes:\n case \"MultiPoint\" as GeoJsonTypes:\n // @ts-expect-error: Known type conflict\n return null;\n case \"LineString\":\n case \"Polygon\":\n case \"MultiLineString\":\n case \"MultiPolygon\":\n geometry = geojson;\n break;\n default:\n throw new Error(\"geojson is invalid\");\n }\n\n // Find SegmentIndex\n // @ts-expect-error: Known type conflict\n if (geometry === null) return null;\n var coords = geometry.coordinates;\n switch (geometry.type) {\n case \"Point\" as GeoJsonTypes:\n case \"MultiPoint\" as GeoJsonTypes:\n // @ts-expect-error: Known type conflict\n return null;\n case \"LineString\":\n if (segmentIndex < 0) segmentIndex = coords.length + segmentIndex - 1;\n return lineString(\n // @ts-expect-error: Known type conflict\n [coords[segmentIndex], coords[segmentIndex + 1]],\n properties,\n options\n );\n case \"Polygon\":\n if (geometryIndex < 0) geometryIndex = coords.length + geometryIndex;\n if (segmentIndex < 0)\n segmentIndex = coords[geometryIndex].length + segmentIndex - 1;\n return lineString(\n [\n // @ts-expect-error: Known type conflict\n coords[geometryIndex][segmentIndex],\n // @ts-expect-error: Known type conflict\n coords[geometryIndex][segmentIndex + 1],\n ],\n properties,\n options\n );\n case \"MultiLineString\":\n if (multiFeatureIndex < 0)\n multiFeatureIndex = coords.length + multiFeatureIndex;\n if (segmentIndex < 0)\n segmentIndex = coords[multiFeatureIndex].length + segmentIndex - 1;\n return lineString(\n [\n // @ts-expect-error: Known type conflict\n coords[multiFeatureIndex][segmentIndex],\n // @ts-expect-error: Known type conflict\n coords[multiFeatureIndex][segmentIndex + 1],\n ],\n properties,\n options\n );\n case \"MultiPolygon\":\n if (multiFeatureIndex < 0)\n multiFeatureIndex = coords.length + multiFeatureIndex;\n if (geometryIndex < 0)\n geometryIndex = coords[multiFeatureIndex].length + geometryIndex;\n if (segmentIndex < 0)\n segmentIndex =\n // @ts-expect-error: Known type conflict\n coords[multiFeatureIndex][geometryIndex].length - segmentIndex - 1;\n return lineString(\n [\n // @ts-expect-error: Known type conflict\n coords[multiFeatureIndex][geometryIndex][segmentIndex],\n // @ts-expect-error: Known type conflict\n coords[multiFeatureIndex][geometryIndex][segmentIndex + 1],\n ],\n properties,\n options\n );\n }\n throw new Error(\"geojson is invalid\");\n}\n\n/**\n * Finds a particular Point from a GeoJSON using `@turf/meta` indexes.\n *\n * Negative indexes are permitted.\n *\n * @param {FeatureCollection|Feature|Geometry} geojson Any GeoJSON Feature or Geometry\n * @param {Object} [options={}] Optional parameters\n * @param {number} [options.featureIndex=0] Feature Index\n * @param {number} [options.multiFeatureIndex=0] Multi-Feature Index\n * @param {number} [options.geometryIndex=0] Geometry Index\n * @param {number} [options.coordIndex=0] Coord Index\n * @param {Object} [options.properties={}] Translate Properties to output Point\n * @param {BBox} [options.bbox={}] Translate BBox to output Point\n * @param {number|string} [options.id={}] Translate Id to output Point\n * @returns {Feature} 2-vertex GeoJSON Feature Point\n * @example\n * var multiLine = turf.multiLineString([\n * [[10, 10], [50, 30], [30, 40]],\n * [[-10, -10], [-50, -30], [-30, -40]]\n * ]);\n *\n * // First Segment (defaults are 0)\n * turf.findPoint(multiLine);\n * // => Feature>\n *\n * // First Segment of the 2nd Multi-Feature\n * turf.findPoint(multiLine, {multiFeatureIndex: 1});\n * // => Feature>\n *\n * // Last Segment of last Multi-Feature\n * turf.findPoint(multiLine, {multiFeatureIndex: -1, coordIndex: -1});\n * // => Feature>\n */\nfunction findPoint<\n G extends GeometryObject,\n P extends GeoJsonProperties = GeoJsonProperties,\n>(\n geojson: Feature | FeatureCollection | G,\n options?: {\n featureIndex?: number;\n multiFeatureIndex?: number;\n geometryIndex?: number;\n coordIndex?: number;\n properties?: P;\n bbox?: BBox;\n id?: Id;\n }\n): Feature {\n // Optional Parameters\n options = options || {};\n if (!isObject(options)) throw new Error(\"options is invalid\");\n var featureIndex = options.featureIndex || 0;\n var multiFeatureIndex = options.multiFeatureIndex || 0;\n var geometryIndex = options.geometryIndex || 0;\n var coordIndex = options.coordIndex || 0;\n\n // Find FeatureIndex\n var properties = options.properties;\n var geometry;\n\n switch (geojson.type) {\n case \"FeatureCollection\":\n if (featureIndex < 0)\n featureIndex = geojson.features.length + featureIndex;\n properties = properties || geojson.features[featureIndex].properties;\n geometry = geojson.features[featureIndex].geometry;\n break;\n case \"Feature\":\n properties = properties || geojson.properties;\n geometry = geojson.geometry;\n break;\n case \"Point\":\n case \"MultiPoint\":\n // @ts-expect-error: Known type conflict\n return null;\n case \"LineString\":\n case \"Polygon\":\n case \"MultiLineString\":\n case \"MultiPolygon\":\n geometry = geojson;\n break;\n default:\n throw new Error(\"geojson is invalid\");\n }\n\n // Find Coord Index\n // @ts-expect-error: Known type conflict\n if (geometry === null) return null;\n // @ts-expect-error: Known type conflict\n var coords = geometry.coordinates;\n switch (geometry.type) {\n case \"Point\":\n return point(coords, properties, options);\n case \"MultiPoint\":\n if (multiFeatureIndex < 0)\n multiFeatureIndex = coords.length + multiFeatureIndex;\n return point(coords[multiFeatureIndex], properties, options);\n case \"LineString\":\n if (coordIndex < 0) coordIndex = coords.length + coordIndex;\n return point(coords[coordIndex], properties, options);\n case \"Polygon\":\n if (geometryIndex < 0) geometryIndex = coords.length + geometryIndex;\n if (coordIndex < 0)\n coordIndex = coords[geometryIndex].length + coordIndex;\n return point(coords[geometryIndex][coordIndex], properties, options);\n case \"MultiLineString\":\n if (multiFeatureIndex < 0)\n multiFeatureIndex = coords.length + multiFeatureIndex;\n if (coordIndex < 0)\n coordIndex = coords[multiFeatureIndex].length + coordIndex;\n return point(coords[multiFeatureIndex][coordIndex], properties, options);\n case \"MultiPolygon\":\n if (multiFeatureIndex < 0)\n multiFeatureIndex = coords.length + multiFeatureIndex;\n if (geometryIndex < 0)\n geometryIndex = coords[multiFeatureIndex].length + geometryIndex;\n if (coordIndex < 0)\n coordIndex =\n coords[multiFeatureIndex][geometryIndex].length - coordIndex;\n return point(\n coords[multiFeatureIndex][geometryIndex][coordIndex],\n properties,\n options\n );\n }\n throw new Error(\"geojson is invalid\");\n}\n\nexport {\n coordReduce,\n coordEach,\n propEach,\n propReduce,\n featureReduce,\n featureEach,\n coordAll,\n geomReduce,\n geomEach,\n flattenReduce,\n flattenEach,\n segmentReduce,\n segmentEach,\n lineReduce,\n lineEach,\n findSegment,\n findPoint,\n};\n"]}