在做地图开发的时候经常需要获取行政区划的边界，下面的网页可以满足如下功能，输入城市区划名，点击查看范围即可
<!DOCTYPE html><html><head><meta http-equiv="Content-Type" content="text/html; charset=gb2312" /><meta name="viewport" content="initial-scale=1.0, user-scalable=no" /><style type="text/css">body, html,#allmap {width: 100%;height: 100%;overflow: hidden;margin:0;font-family:"微软雅黑";}#panel{position:absolute;left:5px;top:5px;}#result{background: #fff;padding:5px;}</style><script src="/jquery/2.0.0/jquery.min.js"></script><script type="text/javascript" src="http://api./api?v=2.0&ak=1XjLLEhZhQNUzd93EjU5nOGQ"></script><title>添加行政区划</title></head><body><div id="allmap"></div><div id="panel"><div><input type="text" id="keyword" value="海淀区"/><input type="button" value="查看范围" id="commitBtn"/>边界经纬度坐标<textarea id="pathStr"></textarea>边界墨卡托坐标<textarea id="pathMc"></textarea></div><div id="result"></div></div></body></html><script type="text/javascript">// 百度地图API功能var map = new BMap.Map("allmap");map.centerAndZoom(new BMap.Point(116.403765, 39.914850), 5);map.enableScrollWheelZoom();var mercatorProjection = map.getMapType().getProjection();$("#commitBtn").bind('click', function(){getBoundary($("#keyword").val());});function getBoundary(city){ var bdary = new BMap.Boundary();bdary.get(city, 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], {strokeWeight: 2, strokeColor: "#ff0000"}); //建立多边形覆盖物map.addOverlay(ply); //添加覆盖物pointArray = pointArray.concat(ply.getPath());} var pathStr = "";var pathMc = "";for (var i = 0; i < pointArray.length; i++) {var mc = mercatorProjection.lngLatToPoint(pointArray[i]);pathStr += pointArray[i].lng + "," + pointArray[i].lat + ";";pathMc += mc.x + "," + mc.y + ";";}$('#pathStr').html(pathStr);$('#pathMc').html(pathMc);var ply = new BMap.Polygon(pointArray , {strokeWeight: 2, strokeColor: "#ff0000"}); //建立多边形覆盖物var bounds = ply.getBounds();var ne = bounds.getNorthEast();var sw = bounds.getSouthWest();var neMc = mercatorProjection.lngLatToPoint(ne);var swMc = mercatorProjection.lngLatToPoint(sw);var str = "经纬度:左下角,右上角：" + sw.lng + "," + sw.lat + ";" + ne.lng + "," + ne.lat+ "<br/>墨卡托坐标:左下角,右上角：" + swMc.x + "," + swMc.y + ";" + neMc.x + "," + neMc.y;$('#result').html(str);console.log(bounds);map.setViewport(pointArray); //调整视野 }); }//getBoundary('北京');</script>
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