getCluster

描述

🌐 Description

获取聚类

🌐 Get Cluster

参数

🌐 Parameters

名称	类型	描述
geojson	FeatureCollection	GeoJSON 特性
filter	*	用于 GeoJSON 属性以获取聚类的过滤器

返回

🌐 Returns

FeatureCollection 按 GeoJSON 属性筛选的单个集群

示例

🌐 Examples

var geojson = turf.featureCollection([
  turf.point([0, 0], { "marker-symbol": "circle" }),
  turf.point([2, 4], { "marker-symbol": "star" }),
  turf.point([3, 6], { "marker-symbol": "star" }),
  turf.point([5, 1], { "marker-symbol": "square" }),
  turf.point([4, 2], { "marker-symbol": "circle" }),
]);

// Create a cluster using K-Means (adds `cluster` to GeoJSON properties)
var clustered = turf.clustersKmeans(geojson);

// Retrieve first cluster (0)
var cluster = turf.getCluster(clustered, { cluster: 0 });
//= cluster

// Retrieve cluster based on custom properties
turf.getCluster(clustered, { "marker-symbol": "circle" }).length;
//= 2
turf.getCluster(clustered, { "marker-symbol": "square" }).length;
//= 1

安装

🌐 Installation

$ npm install @turf/clusters

import { getCluster } from "@turf/clusters";
const result = getCluster(...);

$ npm install @turf/turf

import * as turf from "@turf/turf";
const result = turf.getCluster(...);