concave

描述

🌐 Description

采用一组 points 并返回一个凹壳 Polygon 或 MultiPolygon。内部使用 turf-tin 来生成几何体。

🌐 Takes a set of points and returns a concave hull Polygon or MultiPolygon. Internally, this uses turf-tin to generate geometries.

参数

🌐 Parameters

名称	类型	描述
points	FeatureCollection<Point>	输入点
options?	Object	可选参数 (默认 {})
options.maxEdge?	number	部分船体变为凹面的边的长度（以“单位”为单位）。(默认值为无限大)
options.units?	Units	支持所有有效的 Turf 单位。(默认 '公里')

返回

🌐 Returns

Feature<Polygon | MultiPolygon> | null 凹壳（如果无法计算壳，则返回空值）

示例

🌐 Examples

var points = turf.featureCollection([
  turf.point([-63.601226, 44.642643]),
  turf.point([-63.591442, 44.651436]),
  turf.point([-63.580799, 44.648749]),
  turf.point([-63.573589, 44.641788]),
  turf.point([-63.587665, 44.64533]),
  turf.point([-63.595218, 44.64765]),
]);
var options = { units: "miles", maxEdge: 1 };

var hull = turf.concave(points, options);

安装

🌐 Installation

$ npm install @turf/concave

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

$ npm install @turf/turf

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