length

描述

¥Description

Takes a GeoJSON and measures its length in the specified units, (多个)点's distance are ignored.

¥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	can be degrees, radians, miles, or kilometers (default kilometers)

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(...);