TypeScript meta.coordAll函數代碼示例

/**
 * Compares two geometries of the same dimension and returns true if their intersection set results in a geometry
 * different from both but of the same dimension. It applies to Polygon/Polygon, LineString/LineString,
 * Multipoint/Multipoint, MultiLineString/MultiLineString and MultiPolygon/MultiPolygon.
 *
 * @name booleanOverlap
 * @param  {Geometry|Feature<LineString|MultiLineString|Polygon|MultiPolygon>} feature1 input
 * @param  {Geometry|Feature<LineString|MultiLineString|Polygon|MultiPolygon>} feature2 input
 * @returns {boolean} true/false
 * @example
 * var poly1 = turf.polygon([[[0,0],[0,5],[5,5],[5,0],[0,0]]]);
 * var poly2 = turf.polygon([[[1,1],[1,6],[6,6],[6,1],[1,1]]]);
 * var poly3 = turf.polygon([[[10,10],[10,15],[15,15],[15,10],[10,10]]]);
 *
 * turf.booleanOverlap(poly1, poly2)
 * //=true
 * turf.booleanOverlap(poly2, poly3)
 * //=false
 */
export default function booleanOverlap(
    feature1: Feature<any> | Geometry,
    feature2: Feature<any> | Geometry,
): boolean {
    const geom1 = getGeom(feature1);
    const geom2 = getGeom(feature2);
    const type1 = geom1.type;
    const type2 = geom2.type;
    if (type1 !== type2) throw new Error('features must be of the same type');
    if (type1 === 'Point') throw new Error('Point geometry not supported');

    // features must be not equal
    const equality = new GeojsonEquality({precision: 6});
    if (equality.compare(feature1, feature2)) return false;

    let overlap = 0;

    switch (type1) {
    case 'MultiPoint':
        const coords1 = coordAll(feature1);
        const coords2 = coordAll(feature2);
        coords1.forEach((coord1) => {
            coords2.forEach((coord2) => {
                if (coord1[0] === coord2[0] && coord1[1] === coord2[1]) overlap++;
            });
        });
        break;

    case 'LineString':
    case 'MultiLineString':
        segmentEach(feature1, (segment1) => {
            segmentEach(feature2, (segment2) => {
                if (lineOverlap(segment1, segment2).features.length) overlap++;
            });
        });
        break;

    case 'Polygon':
    case 'MultiPolygon':
        segmentEach(feature1, (segment1) => {
            segmentEach(feature2, (segment2) => {
                if (lineIntersect(segment1, segment2).features.length) overlap++;
            });
        });
        break;
    }

    return overlap > 0;
}

/**
 * Compares two geometries of the same dimension and returns true if their intersection set results in a geometry
 * different from both but of the same dimension. It applies to Polygon/Polygon, LineString/LineString,
 * Multipoint/Multipoint, MultiLineString/MultiLineString and MultiPolygon/MultiPolygon.
 *
 * @name booleanOverlap
 * @param  {Geometry|Feature<LineString|MultiLineString|Polygon|MultiPolygon>} feature1 input
 * @param  {Geometry|Feature<LineString|MultiLineString|Polygon|MultiPolygon>} feature2 input
 * @returns {boolean} true/false
 * @example
 * var poly1 = turf.polygon([[[0,0],[0,5],[5,5],[5,0],[0,0]]]);
 * var poly2 = turf.polygon([[[1,1],[1,6],[6,6],[6,1],[1,1]]]);
 * var poly3 = turf.polygon([[[10,10],[10,15],[15,15],[15,10],[10,10]]]);
 *
 * turf.booleanOverlap(poly1, poly2)
 * //=true
 * turf.booleanOverlap(poly2, poly3)
 * //=false
 */
function booleanOverlap(feature1: Feature<any> | Geometry, feature2: Feature<any> | Geometry): boolean {
    // validation
    if (!feature1) throw new Error('feature1 is required');
    if (!feature2) throw new Error('feature2 is required');
    var type1 = getType(feature1);
    var type2 = getType(feature2);
    if (type1 !== type2) throw new Error('features must be of the same type');
    if (type1 === 'Point') throw new Error('Point geometry not supported');

    // features must be not equal
    var equality = new GeojsonEquality({precision: 6});
    if (equality.compare(feature1, feature2)) return false;

    var overlap = 0;

    switch (type1) {
    case 'MultiPoint':
        var coords1 = coordAll(feature1);
        var coords2 = coordAll(feature2);
        coords1.forEach(function (coord1) {
            coords2.forEach(function (coord2) {
                if (coord1[0] === coord2[0] && coord1[1] === coord2[1]) overlap++;
            });
        });
        break;

    case 'LineString':
    case 'MultiLineString':
        segmentEach(feature1, function (segment1) {
            segmentEach(feature2, function (segment2) {
                if (lineOverlap(segment1, segment2).features.length) overlap++;
            });
        });
        break;

    case 'Polygon':
    case 'MultiPolygon':
        segmentEach(feature1, function (segment1) {
            segmentEach(feature2, function (segment2) {
                if (lineIntersect(segment1, segment2).features.length) overlap++;
            });
        });
        break;
    }

    return overlap > 0;
}

/**
 * Takes a set of {@link Point|points} and partition them into clusters according to {@link DBSCAN's|https://en.wikipedia.org/wiki/DBSCAN} data clustering algorithm.
 *
 * @name clustersDbscan
 * @param {FeatureCollection<Point>} points to be clustered
 * @param {number} maxDistance Maximum Distance between any point of the cluster to generate the clusters (kilometers only)
 * @param {Object} [options={}] Optional parameters
 * @param {string} [options.units="kilometers"] in which `maxDistance` is expressed, can be degrees, radians, miles, or kilometers
 * @param {boolean} [options.mutate=false] Allows GeoJSON input to be mutated
 * @param {number} [options.minPoints=3] Minimum number of points to generate a single cluster,
 * points which do not meet this requirement will be classified as an 'edge' or 'noise'.
 * @returns {FeatureCollection<Point>} Clustered Points with an additional two properties associated to each Feature:
 * - {number} cluster - the associated clusterId
 * - {string} dbscan - type of point it has been classified as ('core'|'edge'|'noise')
 * @example
 * // create random points with random z-values in their properties
 * var points = turf.randomPoint(100, {bbox: [0, 30, 20, 50]});
 * var maxDistance = 100;
 * var clustered = turf.clustersDbscan(points, maxDistance);
 *
 * //addToMap
 * var addToMap = [clustered];
 */
function clustersDbscan(points: FeatureCollection<Point>, maxDistance: number, options: {
    units?: Units,
    minPoints?: number,
    mutate?: boolean
} = {}): FeatureCollection<Point, DbscanProps> {
    // Input validation being handled by Typescript
    // collectionOf(points, 'Point', 'points must consist of a FeatureCollection of only Points');
    // if (maxDistance === null || maxDistance === undefined) throw new Error('maxDistance is required');
    // if (!(Math.sign(maxDistance) > 0)) throw new Error('maxDistance is invalid');
    // if (!(minPoints === undefined || minPoints === null || Math.sign(minPoints) > 0)) throw new Error('options.minPoints is invalid');

    // Clone points to prevent any mutations
    if (options.mutate !== true) points = clone(points);

    // Defaults
    options.minPoints = options.minPoints || 3;

    // create clustered ids
    var dbscan = new clustering.DBSCAN();
    var clusteredIds = dbscan.run(coordAll(points), convertLength(maxDistance, options.units), options.minPoints, distance);

    // Tag points to Clusters ID
    var clusterId = -1;
    clusteredIds.forEach(function (clusterIds) {
        clusterId++;
        // assign cluster ids to input points
        clusterIds.forEach(function (idx) {
            var clusterPoint = points.features[idx];
            if (!clusterPoint.properties) clusterPoint.properties = {};
            clusterPoint.properties.cluster = clusterId;
            clusterPoint.properties.dbscan = 'core';
        });
    });

    // handle noise points, if any
    // edges points are tagged by DBSCAN as both 'noise' and 'cluster' as they can "reach" less than 'minPoints' number of points
    dbscan.noise.forEach(function (noiseId) {
        var noisePoint = points.features[noiseId];
        if (!noisePoint.properties) noisePoint.properties = {};
        if (noisePoint.properties.cluster) noisePoint.properties.dbscan = 'edge';
        else noisePoint.properties.dbscan = 'noise';
    });

    return points;
}

/**
 * Takes a set of {@link Point|points} and partition them into clusters using the k-mean .
 * It uses the [k-means algorithm](https://en.wikipedia.org/wiki/K-means_clustering)
 *
 * @name clustersKmeans
 * @param {FeatureCollection<Point>} points to be clustered
 * @param {Object} [options={}] Optional parameters
 * @param {number} [options.numberOfClusters=Math.sqrt(numberOfPoints/2)] numberOfClusters that will be generated
 * @param {boolean} [options.mutate=false] allows GeoJSON input to be mutated (significant performance increase if true)
 * @returns {FeatureCollection<Point>} Clustered Points with an additional two properties associated to each Feature:
 * - {number} cluster - the associated clusterId
 * - {[number, number]} centroid - Centroid of the cluster [Longitude, Latitude]
 * @example
 * // create random points with random z-values in their properties
 * var points = turf.randomPoint(100, {bbox: [0, 30, 20, 50]});
 * var options = {numberOfClusters: 7};
 * var clustered = turf.clustersKmeans(points, options);
 *
 * //addToMap
 * var addToMap = [clustered];
 */
function clustersKmeans(points: FeatureCollection<Point>, options: {
    numberOfClusters?: number,
    mutate?: boolean
} = {}): FeatureCollection<Point, KmeansProps> {
    // Default Params
    var count = points.features.length;
    options.numberOfClusters = options.numberOfClusters || Math.round(Math.sqrt(count / 2));

    // numberOfClusters can't be greater than the number of points
    // fallbacks to count
    if (options.numberOfClusters > count) options.numberOfClusters = count;

    // Clone points to prevent any mutations (enabled by default)
    if (options.mutate !== true) points = clone(points);

    // collect points coordinates
    var data = coordAll(points);

    // create seed to avoid skmeans to drift
    var initialCentroids = data.slice(0, options.numberOfClusters);

    // create skmeans clusters
    var skmeansResult = skmeans(data, options.numberOfClusters, initialCentroids);

    // store centroids {clusterId: [number, number]}
    var centroids = {};
    skmeansResult.centroids.forEach(function (coord, idx) {
        centroids[idx] = coord;
    });

    // add associated cluster number
    featureEach(points, function (point, index) {
        var clusterId = skmeansResult.idxs[index];
        point.properties.cluster = clusterId;
        point.properties.centroid = centroids[clusterId];
    });

    return points;
}

  return prev;
}, [], false);
let stringReduce: string = coordReduce(pointFeatureCollection, (prev, curr) => prev + curr.toString(), "", false);

propEach(pointFeatureCollection, prop => console.log(prop));

let propCombine: any = propReduce(pointFeatureCollection, (prev, curr) => {
  for (let key in curr) {
    prev[key] = curr[key];
  }
  return prev;
}, {});

featureEach(pointFeatureCollection, feature => console.log(feature));

coordAll(pointFeatureCollection);

turf.midpoint(pointFeature, pointFeature2);

turf.nearest(pointFeature, pointFeatureCollection);

turf.planepoint(pointFeature, triangleFeature);

turf.pointGrid(bbox, 20, "miles");
turf.pointGrid(bbox, 20);

turf.pointOnLine(lineFeature, pointFeature, "nauticalmiles");
turf.pointOnLine(lineFeature, pointFeature);

turf.pointOnSurface(polygonFeature);
turf.pointOnSurface(lineFeature);