直接上代码：
<!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title></title> <script type="text/javascript" src="http://api.map.baidu.com/api?v=2.0&ak=1nCQCnDr3Nt3GKDVeBmKGe2Y"></script> <script type="text/javascript" src="http://api.map.baidu.com/library/GeoUtils/1.2/src/GeoUtils_min.js"></script> </head> <body> <div id="allmap" style="1000px;height:500px"></div> <div id="divInfo"></div> </body> </html> <script type="text/javascript"> window.onload = function () { var map = new BMap.Map("allmap"); map.centerAndZoom(new BMap.Point(106.258277, 29.498607), 5); map.enableScrollWheelZoom(); var bdary = new BMap.Boundary(); bdary.get("沙坪坝区", function (rs) { //获取行政区域 map.clearOverlays(); //清除地图覆盖物 var count = rs.boundaries.length; //行政区域的点有多少个 if (count === 0) { alert('未能获取当前输入行政区域'); return; } var pointArray = []; for (var i = 0; i < count; i++) { var ply = new BMap.Polygon(rs.boundaries[i]); //建立多边形覆盖物 map.addOverlay(ply); //添加覆盖物 pointArray = pointArray.concat(ply.getPath()); map.setViewport(pointArray); var res = "", minX = 106.258277, minY = 29.498607, x = 0, y = 0,pt=null; for (var i = 0; i < 2000; i++) { x = minX + getRandom(); y = minY + getRandom(); pt = new BMap.Point(x, y); if (BMapLib.GeoUtils.isPointInPolygon(pt, ply)) { var marker = marker = new BMap.Marker(new BMap.Point(x, y)); map.addOverlay(marker); //res += 'marker = new BMap.Marker(new BMap.Point(' + x + ' ,' + y + '));<br/>map.addOverlay(marker);<br/> '; } } divInfo.innerHTML = res; } // map.setViewport(pointArray); //调整视野 //addlabel(); }); //document.getElementById("divInfo").innerHTML = Math.random()/4; } function getRandom() { return Math.random() / 2; } </script>
运行效果图
