百度地图画出区域并获取区域坐标范围
Posted 攻城狮的世界我不懂——lmky
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转载自:http://blog.csdn.net/zzq900503/article/details/21714491
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="http://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="http://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="http://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" onclick="drawingManager.open()"/>打开</label> <label><input type="radio" name="openClose1" onclick="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" onclick="drawingManager.enableCalculate()"/>打开</label> <label><input type="radio" name="openClose" onclick="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" onclick="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" onclick="drawingManager.setDrawingMode(BMAP_DRAWING_CIRCLE)"/>画圆</label>
- </li>
- <li>
- <label><input type="radio" name="drawmode" onclick="drawingManager.setDrawingMode(BMAP_DRAWING_POLYLINE)"/>画线</label>
- </li>
- <li>
- <label><input type="radio" name="drawmode" onclick="drawingManager.setDrawingMode(BMAP_DRAWING_POLYGON)"/>画多边形</label>
- </li>
- <li>
- <label><input type="radio" name="drawmode" onclick="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" onclick="alert(overlays.length)"/>
- <input type="button" value="清除所有覆盖物" onclick="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>
线、矩形等多边形的 坐标获取 需要根据 e.overlay.getPath().length,通过for循环获取
e.overlay.getPath()[0].lng e.overlay.getPath()[0].lat
示例:
for(var i = 0; i < overlays_lines.length; i++){//循环连线个数
for(var j = 0; j < overlays_lines[i].getPath().length; j++){//循环每一个连线上的点个数
var object = new Object();
object.lnglatX = overlays_lines[i].getPath()[j].lng;
object.lnglatY = overlays_lines[i].getPath()[j].lat;
linelnglatArr.push(object);
}
}
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