区域面积

使用 AMap.GeometryUtil.ringArea 计算区域,返回数据以平方米为单位。

源代码编辑器

 <!doctype html>
<html>
<head>
 <meta charset="utf-8">
 <meta http-equiv="X-UA-Compatible" content="IE=edge">
 <meta name="viewport" content="initial-scale=1.0, user-scalable=no, width=device-width">
 <title>面积计算</title>
 <link rel="stylesheet" href="https://a.amap.com/jsapi_demos/static/demo-center/css/demo-center.css" type="text/css">
 <style>
 html,body,#container{
 height: 100%
 }
 </style>
</head>
<body>
<div id="container"></div>
<script type="text/javascript" src="https://webapi.amap.com/maps?v=2.0&key=您申请的key值"></script>
<script type="text/javascript">
 //初始化地图对象,加载地图
 var map = new AMap.Map("container", {
 resizeEnable: true,
 zoom: 10
 });
 var path = [
 [116.169465,39.932670],
 [116.160260,39.924492], 
 [116.150625,39.710019],
 [116.183198,39.709920], 
 [116.226950,39.777616], 
 [116.442621,39.799892],
 [116.463478,39.790066], 
 [116.588276,39.809551],
 [116.536091,39.808859],
 [116.573856,39.839643], 
 [116.706380,39.916740],
 [116.600293,39.937770],
 [116.514805,39.982375],
 [116.499935,40.013710],
 [116.546520,40.030443], 
 [116.687668,40.129961], 
 [116.539697,40.080659],
 [116.503390,40.058474],
 [116.468800,40.052578]
 ];
 var polygon = new AMap.Polygon({
 map: map,
 fillOpacity:0.4,
 path: path
 });
 // 计算区域面积
 var area = Math.round(AMap.GeometryUtil.ringArea(path));
 var text = new AMap.Text({
 position: new AMap.LngLat(116.468800,40.052578),
 text: '区域面积' + area + '平方米',
 offset: new AMap.Pixel(-20, -20)
 })
 map.add(text);
 map.setFitView();
</script>
</body>
</html>
 
 

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