length

描述

🌐 Description

接受一个 GeoJSON 并以指定单位测量其长度，(Multi)Point 的距离将被忽略。

🌐 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	Feature<LineString | MultiLineString>	用于测量的GeoJSON
options?	Object	可选参数 (默认 {})
options.units?	Units	支持所有有效的 Turf 单位。_(默认公里)

返回

🌐 Returns

number GeoJSON 的长度

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(...);