百度地图画出区域并获取区域坐标范围

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API原型 http://developer.baidu.com/map/jsdemo.htm#f0_7

效果如图:

源代码,新建为html可用:(注意  百度地图密钥需要自己的百度帐号开通申请一下)

<!DOCTYPE html><html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><meta name="viewport" content="initial-scale=1.0, user-scalable=no" /><style type="text/css">body, html{width: 100%;height: 100%;overflow: hidden;margin:0;}#allmap {margin-right: 300px;height: 100%;overflow: hidden;}#result {border-left:1px dotted #999;height:100%;width:295px;position:absolute;top:0px;right:0px;font-size:12px;}dl,dt,dd,ul,li{    margin:0;    padding:0;    list-style:none;}p{font-size:12px;}dt{    font-size:14px;    font-family:"微软雅黑";    font-weight:bold;    border-bottom:1px dotted #000;    padding:5px 0 5px 5px;    margin:5px 0;}dd{    padding:5px 0 0 5px;}li{    line-height:28px;}</style><script type="text/javascript" src="https://api.map.baidu.com/api?v=2.0&ak=百度地图密钥"></script><!--加载鼠标绘制工具--><script type="text/javascript" src="https://api.map.baidu.com/library/DrawingManager/1.4/src/DrawingManager_min.js"></script><link rel="stylesheet" href="http://api.map.baidu.com/library/DrawingManager/1.4/src/DrawingManager_min.css" /><!--加载检索信息窗口--><script type="text/javascript" src="https://api.map.baidu.com/library/SearchInfoWindow/1.4/src/SearchInfoWindow_min.js"></script><link rel="stylesheet" href="http://api.map.baidu.com/library/SearchInfoWindow/1.4/src/SearchInfoWindow_min.css" /> <title>鼠标绘制工具</title></head><body><div id="allmap" style="overflow:hidden;zoom:1;position:relative;">	    <div id="map" style="height:100%;-webkit-transition: all 0.5s ease-in-out;transition: all 0.5s ease-in-out;"></div>    <div id="showPanelBtn" style="position:absolute;font-size:14px;top:50%;margin-top:-95px;right:0px;width:20px;padding:10px 10px;color:#999;cursor:pointer;text-align:center;height:170px;background:rgba(255,255,255,0.9);-webkit-transition: all 0.5s ease-in-out;transition: all 0.5s ease-in-out;font-family:'微软雅黑';font-weight:bold;">显示检索结果面板<br/><</div>    <div id="panelWrap" style="width:0px;position:absolute;top:0px;right:0px;height:100%;overflow:auto;-webkit-transition: all 0.5s ease-in-out;transition: all 0.5s ease-in-out;">        <div style="width:20px;height:200px;margin:-100px 0 0 -10px;color:#999;position:absolute;opacity:0.5;top:50%;left:50%;" id="showOverlayInfo">此处用于展示覆盖物信息</div>        <div id="panel" style="position:absolute;"></div>    </div></div> <div id="result">    <dl>    	<dt>绘制工具功能</dt>            <ul>                <li><label><input type="radio" name="openClose1" οnclick="drawingManager.open()"/>打开</label>  <label><input type="radio" name="openClose1" οnclick="drawingManager.close()" checked="checked"/>关闭</label></li>            </ul>        </dd>    	<dt>是否进行线或面积的计算(单位米)</dt>            <ul>                <li><label><input type="radio" name="openClose" οnclick="drawingManager.enableCalculate()"/>打开</label>  <label><input type="radio" name="openClose" οnclick="drawingManager.disableCalculate()"  checked="checked"/>关闭</label></li>            </ul>        </dd>    	<dt>绘制功能</dt>        <dd>            <ul>                <li>                    <label><input type="radio" name="drawmode" οnclick="drawingManager.setDrawingMode(BMAP_DRAWING_MARKER)" checked="checked"/>画点</label>                    <input type="checkbox" id="isInfowindow"/> 是否带信息窗口                </li>                <li>                    <label><input type="radio" name="drawmode" οnclick="drawingManager.setDrawingMode(BMAP_DRAWING_CIRCLE)"/>画圆</label>                </li>                <li>                    <label><input type="radio" name="drawmode" οnclick="drawingManager.setDrawingMode(BMAP_DRAWING_POLYLINE)"/>画线</label>                </li>                <li>                    <label><input type="radio" name="drawmode" οnclick="drawingManager.setDrawingMode(BMAP_DRAWING_POLYGON)"/>画多边形</label>                </li>                <li>                    <label><input type="radio" name="drawmode" οnclick="drawingManager.setDrawingMode(BMAP_DRAWING_RECTANGLE)"/>画矩形</label>                </li>            </ul>        </dd>    	<dt>覆盖物操作</dt>        <dd>            <ul>                <li>                    <input type="button" value="获取绘制的覆盖物个数" οnclick="alert(overlays.length)"/>                    <input type="button" value="清除所有覆盖物" οnclick="clearAll()"/>                    <input type="button" value="获取最后一个覆盖物信息" id="getLastOverLay"/>                </li>            </ul>        </dd>    </dl> </div> <script type="text/javascript"> // 百度地图API功能    var map = new BMap.Map('map');    var poi = new BMap.Point(116.307852,40.057031);    map.centerAndZoom(poi, 16);    map.enableScrollWheelZoom();     $("getLastOverLay").onclick = function(){        if(overlays.length){            alert(overlays[overlays.length - 1]);        }else{            alert("没有覆盖物");        }    }     //信息窗口的内容定义    var content = '<div style="margin:0;line-height:20px;padding:2px;">' +                    '地址:北京市海淀区上地十街10号<br/>电话:(010)59928888<br/>简介:百度大厦位于北京市海淀区西二旗地铁站附近,为百度公司综合研发及办公总部。' +                  '</div>';        //创建带信息窗口的poi点    var searchInfoWindow = new BMapLib.SearchInfoWindow(map, content, {        title  : "百度大厦",      //标题        width  : 290,             //宽度        height : 105,              //高度        panel  : "panel",         //检索结果面板        enableAutoPan : true,     //自动平移        searchTypes   :[            BMAPLIB_TAB_SEARCH,   //周边检索            BMAPLIB_TAB_TO_HERE,  //到这里去            BMAPLIB_TAB_FROM_HERE //从这里出发        ]    });            var overlays = [];    //回调获得覆盖物信息    var overlaycomplete = function(e){        overlays.push(e.overlay);        var result = "";        result = "<p>";        result += e.drawingMode + ":";        if (e.drawingMode == BMAP_DRAWING_MARKER) {            result += ' 坐标:' + e.overlay.getPosition().lng + ',' + e.overlay.getPosition().lat;            if ($('isInfowindow').checked) {                searchInfoWindow.open(e.overlay);            }        }        if (e.drawingMode == BMAP_DRAWING_CIRCLE) {            result += ' 半径:' + e.overlay.getRadius();            result += ' 中心点:' + e.overlay.getCenter().lng + "," + e.overlay.getCenter().lat;        }        if (e.drawingMode == BMAP_DRAWING_POLYLINE || e.drawingMode == BMAP_DRAWING_POLYGON || e.drawingMode == BMAP_DRAWING_RECTANGLE) {            result += ' 所画的点个数:' + e.overlay.getPath().length;        }        result += "</p>";        $("showOverlayInfo").style.display = "none";        $("panel").innerHTML += result; //将绘制的覆盖物信息结果输出到结果面板    };     var styleOptions = {        strokeColor:"red",    //边线颜色。        fillColor:"red",      //填充颜色。当参数为空时,圆形将没有填充效果。        strokeWeight: 3,       //边线的宽度,以像素为单位。        strokeOpacity: 0.8,	   //边线透明度,取值范围0 - 1。        fillOpacity: 0.6,      //填充的透明度,取值范围0 - 1。        strokeStyle: 'solid' //边线的样式,solid或dashed。    }    //实例化鼠标绘制工具    var drawingManager = new BMapLib.DrawingManager(map, {        isOpen: false, //是否开启绘制模式        enableDrawingTool: true, //是否显示工具栏        drawingToolOptions: {            anchor: BMAP_ANCHOR_TOP_RIGHT, //位置            offset: new BMap.Size(5, 5), //偏离值            scale: 0.8 //工具栏缩放比例        },        circleOptions: styleOptions, //圆的样式        polylineOptions: styleOptions, //线的样式        polygonOptions: styleOptions, //多边形的样式        rectangleOptions: styleOptions //矩形的样式    });         //添加鼠标绘制工具监听事件,用于获取绘制结果    drawingManager.addEventListener('overlaycomplete', overlaycomplete);         function $(id){        return document.getElementById(id);    }     function clearAll() {        for(var i = 0; i < overlays.length; i++){            map.removeOverlay(overlays[i]);        }        overlays.length = 0    }     var isPanelShow = false;    //显示结果面板动作    $("showPanelBtn").onclick = showPanel;    function showPanel(){        if (isPanelShow == false) {            isPanelShow = true;            $("showPanelBtn").style.right = "230px";            $("panelWrap").style.width = "230px";            $("map").style.marginRight = "230px";            $("showPanelBtn").innerHTML = "隐藏绘制结果信息<br/>>";        } else {            isPanelShow = false;            $("showPanelBtn").style.right = "0px";            $("panelWrap").style.width = "0px";            $("map").style.marginRight = "0px";            $("showPanelBtn").innerHTML = "显示绘制结果信息<br/><";        }    } </script> </body></html></script>

矩形 等多边形的 坐标获取 需要根据 length   for循环获取

 e.overlay.getPath()[0].lng    e.overlay.getPath()[0].lat

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