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Version: 7.2.0

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(...);