length
描述
¥Description
获取一个 GeoJSON 对象,并以指定单位测量其长度,忽略 (多个)点 对象的距离。
¥Takes a GeoJSON and measures its length in the specified units, (Multi)Point's distance are ignored.
参数
¥Parameters
名称 | 类型 | 描述 |
---|---|---|
geojson | 特性<LineString | MultiLineString> | 待测量的 GeoJSON |
options? | 对象 | 可选参数(默认 {}) |
options.units? | string | 可以是度、弧度、英里或千米(默认千米) |
返回
¥Returns
number GeoJSON 的长度
¥number length of GeoJSON
示例
¥Examples
var line = turf.lineString([
[115, -32],
[131, -22],
[143, -25],
[150, -34],
]);
var length = turf.length(line, { units: "miles" });
安装
¥Installation
$ npm install @turf/length
import { length } from "@turf/length";
const result = length(...);
$ npm install @turf/turf
import * as turf from "@turf/turf";
const result = turf.length(...);