如何使用Leaflet.Draw GeometryUtil计算多边形的面积 [英] how to calculate area of polygon using Leaflet.Draw GeometryUtil

问题描述

关于如何计算多边形的面积，我阅读了此答案，我正在尝试实现相同的效果.但是，该区域的值始终为0(零).

I read this answer on how to calculate the area of a polygon and I am trying to achieve the same. However, I consistently get 0 (zero) for the area.

JS小提琴位于此处. 我的代码的关键是:

JS fiddle is here. The crux of my code is:

var map = L.map('map').setView([19.04469, 72.9258], 12).addLayer(osm);
var latlngs = [[19.04469, 72.9258], [19.07459, 72.9358], [19.08469, 72.4758]];
var polygon = L.polygon(latlngs, {color: 'red'}).addTo(map);
console.log('area is: '+L.GeometryUtil.geodesi

我始终在控制台上获得area is: 0.

I consistently get area is: 0 on the console.

推荐答案

您应该添加.getLatLngs()参见此小提琴

L.GeometryUtil.geodesicArea(polygon.getLatLngs()));

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