javascript - 在谷歌地图中减去两个多边形

Question

我在 Google map 上绘制了三个多边形，第一个在第二个中，第二个在第三个中。我想在 javascript 中将它们减去另一种形状。

P3-P2 ？P2-P1 ?

Answer 1

比我想的更简单:

var poly1Area = google.maps.geometry.spherical.computeArea(poly1.getPath());
var poly2Area = google.maps.geometry.spherical.computeArea(poly2.getPath());
var poly3Area = google.maps.geometry.spherical.computeArea(poly3.getPath());

poly2Area = poly2Area - poly1Area;
poly3Area = poly3Area - poly2Area;

引用:https://developers.google.com/maps/documentation/javascript/reference?csw=1#spherical