convex

描述

🌐 Description

接受一个 Feature 或一个 FeatureCollection 并返回一个凸包 Polygon。

🌐 Takes a Feature or a FeatureCollection and returns a convex hull Polygon.

内部使用了 convex-hull 模块，该模块实现了 monotone chain hull。

🌐 Internally this uses the convex-hull module that implements a monotone chain hull.

参数

🌐 Parameters

名称	类型	描述
geojson	GeoJSON	输入要素或要素集合
options?	Object	可选参数 (默认 {})
options.concavity?	number	1 - 瘦形状。Infinity - 凸包。(默认 Infinity)
options.properties?	Object	将属性转换为功能 (默认 {})

返回

🌐 Returns

Feature<Polygon> 凸包

示例

🌐 Examples

var points = turf.featureCollection([
  turf.point([10.195312, 43.755225]),
  turf.point([10.404052, 43.8424511]),
  turf.point([10.579833, 43.659924]),
  turf.point([10.360107, 43.516688]),
  turf.point([10.14038, 43.588348]),
  turf.point([10.195312, 43.755225]),
]);

var hull = turf.convex(points);

安装

🌐 Installation

$ npm install @turf/convex

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

$ npm install @turf/turf

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