convex

描述

¥Description

获取一个 特性 或 FeatureCollection 对象并返回其凸包 多边形。

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

内部使用实现了 单调链包 的 convex-hull 模块。

¥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?	对象	可选参数（默认 {}）
options.concavity?	number	1 - 细化形状。无穷大 - 凸包。(默认 Infinity)
options.properties?	对象	将属性转换为要素（默认 {})

返回

¥Returns

特性<多边形> 凸包

¥Feature<Polygon> a convex hull

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(...);