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<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>行政区域工具</title>
<script type="text/javascript" src="http://api.map.baidu.com/api?v=1.2"></script>
</head>
<body>
<div style="520px;height:340px;border:1px solid gray" id="container"></div>
<p><input id="startBtn" type="button" onclick="startTool();" value="开启取点工具" /><input type="button" onclick="map.clearOverlays();document.getElementById('info').innerHTML = '';points=[];" value="清除" /></p>
<div id="info"></div>
</body>
</html>
<script type="text/javascript">
var map = new BMap.Map("container"); // 创建Map实例
map.centerAndZoom("武汉", 11); // 初始化地图,设置中心点坐标和地图级别
var key = 1; //开关
var newpoint; //一个经纬度
var points = []; //数组，放经纬度信息
var polyline = new BMap.Polyline(); //折线覆盖物
function startTool(){ //开关函数
if(key==1){
document.getElementById("startBtn").style.background = "green";
document.getElementById("startBtn").style.color = "white";
document.getElementById("startBtn").value = "开启状态";
key=0;
}
else{
document.getElementById("startBtn").style.background = "red";
document.getElementById("startBtn").value = "关闭状态";
key=1;
}
}
map.addEventListener("click",function(e){ //单击地图，形成折线覆盖物
newpoint = new BMap.Point(e.point.lng,e.point.lat);
if(key==0){
// if(points[points.length].lng==points[points.length-1].lng){alert(111);}
points.push(newpoint); //将新增的点放到数组中
polyline.setPath(points); //设置折线的点数组
map.addOverlay(polyline); //将折线添加到地图上
document.getElementById("info").innerHTML += "new BMap.Point(" + e.point.lng + "," + e.point.lat + "),</br>"; //输出数组里的经纬度
}
});
map.addEventListener("dblclick",function(e){ //双击地图，形成多边形覆盖物
if(key==0){
map.disableDoubleClickZoom(); //关闭双击放大
var polygon = new BMap.Polygon(points);
map.addOverlay(polygon); //将折线添加到地图上
}
});
</script>
具体代码：
<!--百度地图容器-->
<div style="697px;height:550px;border:#ccc solid 1px;" id="dituContent"></div>
<!--百度地图容器-->
<script type="text/javascript">
//创建和初始化地图函数：
function initMap(){
createMap();//创建地图
setMapEvent();//设置地图事件
addMapControl();//向地图添加控件
addMarker();//向地图中添加marker
addPolyline();//向地图中添加线
}
//创建地图函数：
function createMap(){
var map = new BMap.Map("dituContent");//在百度地图容器中创建一个地图
var point = new BMap.Point(114.316967,30.566984);//定义一个中心点坐标
map.centerAndZoom(point,16);//设定地图的中心点和坐标并将地图显示在地图容器中
window.map = map;//将map变量存储在全局
}
//地图事件设置函数：
function setMapEvent(){
map.enableDragging();//启用地图拖拽事件，默认启用(可不写)
map.enableScrollWheelZoom();//启用地图滚轮放大缩小
map.enableDoubleClickZoom();//启用鼠标双击放大，默认启用(可不写)
map.enableKeyboard();//启用键盘上下左右键移动地图
}
//地图控件添加函数：
function addMapControl(){
//向地图中添加缩放控件
var ctrl_nav = new BMap.NavigationControl({anchor:BMAP_ANCHOR_TOP_LEFT,type:BMAP_NAVIGATION_CONTROL_LARGE});
map.addControl(ctrl_nav);
//向地图中添加缩略图控件
var ctrl_ove = new BMap.OverviewMapControl({anchor:BMAP_ANCHOR_TOP_RIGHT,isOpen:1});
map.addControl(ctrl_ove);
//向地图中添加比例尺控件
var ctrl_sca = new BMap.ScaleControl({anchor:BMAP_ANCHOR_BOTTOM_LEFT});
map.addControl(ctrl_sca);
}
//标注点数组
var markerArr = [{title:"郑大哥野鸭",content:"<p style="300px; line-height:20px;">郑大哥野鸭</p>" +
"<p>官方网站：<a href="http://www.zhengdage.com" target="top">http://www.zhengdage.com.</a></p>",point:"114.316967|30.566984",isOpen:0,icon:{w:21,h:21,l:0,t:0,x:6,lb:5}}
];
//创建marker
function addMarker(){
for(var i=0;i<markerArr.length;i++){
var json = markerArr[i];
var p0 = json.point.split("|")[0];
var p1 = json.point.split("|")[1];
var point = new BMap.Point(p0,p1);
var iconImg = createIcon(json.icon);
var marker = new BMap.Marker(point,{icon:iconImg});
var iw = createInfoWindow(i);
var label = new BMap.Label(json.title,{"offset":new BMap.Size(json.icon.lb-json.icon.x+10,-20)});
marker.setLabel(label);
map.addOverlay(marker);
label.getDom().style.borderColor = "#808080";
label.getDom().style.color = "#333";
label.getDom().style.cursor = "pointer";
(function(){
var index = i;
var _iw = createInfoWindow(i);
var _marker = marker;
_marker.addEventListener("click",function(){
this.openInfoWindow(_iw);
});
_iw.addEventListener("open",function(){
_marker.getLabel().hide();
})
_iw.addEventListener("close",function(){
_marker.getLabel().show();
})
label.addEventListener("click",function(){
_marker.openInfoWindow(_iw);
})
if(!!json.isOpen){
label.hide();
_marker.openInfoWindow(_iw);
}
})()
}
}
//创建InfoWindow
function createInfoWindow(i){
var json = markerArr[i];
var iw = new BMap.InfoWindow("<b class='iw_poi_title' title='" + json.title + "'>" + json.title + "</b><div class='iw_poi_content'>"+json.content+"</div>");
return iw;
}
//创建一个Icon
function createIcon(json){
var icon = new BMap.Icon("http://openapi.baidu.com/map/images/us_mk_icon.png", new BMap.Size(json.w,json.h),{imageOffset: new BMap.Size(-json.l,-json.t),infoWindowOffset:new BMap.Size(json.lb+5,1),offset:new BMap.Size(json.x,json.h)})
return icon;
}
//标注线数组
var plPoints = [{style:"solid",weight:2,color:"#f00",opacity:1,points:["114.316967|30.566984","114.317038|30.564651","114.319626|30.565553","114.31959|30.567574","114.317973|30.568352","114.316068|30.566237","114.315565|30.564403"]}
];
//向地图中添加线函数
function addPolyline(){
for(var i=0;i<plPoints.length;i++){
var json = plPoints[i];
var points = [];
for(var j=0;j<json.points.length;j++){
var p1 = json.points[j].split("|")[0];
var p2 = json.points[j].split("|")[1];
points.push(new BMap.Point(p1,p2));
}
var line = new BMap.Polyline(points,{strokeStyle:json.style,strokeWeight:json.weight,strokeColor:json.color,strokeOpacity:json.opacity});
map.addOverlay(line);
}
}
//向地图中添加文字标注函数dd
function addRemark(){
for(var i=0;i<lbPoints.length;i++){
var json = lbPoints[i];
var p1 = json.point.split("|")[0];
var p2 = json.point.split("|")[1];
var label = new BMap.Label("<div style='padding:2px;'>"+json.content+"</div>",{point:new BMap.Point(p1,p2),offset:new BMap.Size(3,-6)});
map.addOverlay(label);
label.setStyle({borderColor:"#999"});
}
}
initMap();//创建和初始化地图
</script>