sample

描述

¥Description

获取一个 FeatureCollection 对象，并返回一个包含随机指定数量 features 对象的 FeatureCollection。

¥Takes a FeatureCollection and returns a FeatureCollection with given number of features at random.

参数

¥Parameters

名称	类型	描述
fc	FeatureCollection<T>
num	number	待选要素数量
featurecollection	FeatureCollection	输入要素集

返回

¥Returns

FeatureCollection 包含 n 个要素的要素集合

¥FeatureCollection a FeatureCollection with n features

示例

¥Examples

var points = turf.randomPoint(100, { bbox: [-80, 30, -60, 60] });

var sample = turf.sample(points, 5);

安装

¥Installation

$ npm install @turf/sample

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

$ npm install @turf/turf

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