利用高德地图实现一个点是否在一个任意多边形内
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<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>点是否在多边形内</title>
<link rel="stylesheet" href="/jsapi_demos/static/demo-center/css/" type="text/css">
<script type="text/javascript" src="/maps?v=1.4.13&key=你的高德ak"></script>
<script type="text/javascript" src="/lbs/static/"></script>
<style>
html,body,#container{
height: 100%
}
</style>
</head>
<body>
<div id="container"></div>
<div class='info'>拖动Marker可调整位置</div>
<script type="text/javascript">
//初始化地图对象，加载地图
var map = new AMap.Map("container", {
resizeEnable: true,
zoom: 13
});
// 创建多边形
var path = [
[116.169465,39.932670],
[116.160260,39.924492],
[116.186138,39.879817],
[116.150625,39.710019],
[116.183198,39.709920],
[116.226950,39.777616],
[116.421078,39.810771],
[116.442621,39.799892],
[116.463478,39.790066],
[116.588276,39.809551],
[116.536091,39.808859],
[116.573856,39.839643],
[116.706380,39.916740],
[116.657285,39.934545],
[116.600293,39.937770],
[116.540039,39.937968],
[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
});
// 创建点
var marker = new AMap.Marker({
map: map,
draggable:true,
position: [116.566298, 40.014179]
});
function compute(){
var point = marker.getPosition();
var isPointInRing = AMap.GeometryUtil.isPointInRing(point,path);
marker.setLabel({
content:isPointInRing?'内部':'外部',
offset:new AMap.Pixel(20,0)
});
}
compute();
// 为marker绑定拖拽事件
marker.on('dragging',compute)
map.setFitView();
</script>
</body>
</html>