如何使用GeoJson定义圆? [英] How to define a circle using GeoJson?

问题描述

我想在Mongodb中使用几何.

I want to use geometry in Mongodb.

但根据 geojson.org

推荐答案

我遇到了完全相同的问题，解决方案是创建一个大致近似于圆形的多边形(想象一个具有32个以上边的多边形).

I had exactly the same problem, the solution is to create a polygon that roughly approximates a circle (imagine a polygon with 32+ edges).

我编写了一个模块来完成此操作.您可以像这样使用它:

I wrote a module that does this. You can use it like this:

const circleToPolygon = require('circle-to-polygon');

const coordinates = [-27.4575887, -58.99029]; //[lon, lat]
const radius = 100;                           // in meters
const numberOfEdges = 32;                     //optional that defaults to 32

let polygon = circleToPolygon(coordinates, radius, numberOfEdges);

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