baidu map api note
地图级别控制
// 百度地图API功能var map = new BMap.Map("allmap", {enableMapClick:false});//构造底图时，关闭底图可点功能 // 初始化地图,设置中心点坐标(城市名)和地图级别map.centerAndZoom("上海",15); map.centerAndZoom(new BMap.Point(116.404, 39.915), 11); // 移动地图到中心点 map.panTo(new BMap.Point(113.262232,23.154345));// 设置缩放级别 map.setZoom(14); // 开启地图缩放 map.enableScrollWheelZoom();// 可以拖拽marker.enableDragging();// 不可以拖拽marker.disableDragging();
获取两点之间距离
var pointA = new BMap.Point(106.486654,29.490295); // 创建点坐标A--大渡口区 var pointB = new BMap.Point(106.581515,29.615467); // 创建点坐标B--江北区 alert('从大渡口区到江北区的距离是：'+(map.getDistance(pointA,pointB)).toFixed(2)+' 米。'); //获取两点距离
添加 图形，点，线，面 文字
// marker是随着地图缩放级别，尺寸变化的var marker = new BMap.Marker(new BMap.Point(116.404, 39.915)); // 创建点// 折线var polyline = new BMap.Polyline([new BMap.Point(116.399, 39.910),new BMap.Point(116.405, 39.920),new BMap.Point(116.425, 39.900)], {strokeColor: "blue", strokeWeight: 2, strokeOpacity: 0.5}); //创建折线// 创建圆var circle = new BMap.Circle(point, 1500,{strokeColor: "blue", fillColor: "#ccc", strokeWeight: 2, strokeOpacity: 0.5, fillOpacity: 0.7}); // 多边形var polygon = new BMap.Polygon([new BMap.Point(116.387112, 39.920977),new BMap.Point(116.385243, 39.913063),new BMap.Point(116.394226, 39.917988),new BMap.Point(116.401772, 39.921364),new BMap.Point(116.41248, 39.927893)], {strokeColor: "blue", strokeWeight: 2, strokeOpacity: 0.5}); //创建矩形var pStart = new BMap.Point(116.392214, 39.918985);var pEnd = new BMap.Point(116.41478, 39.911901);var rectangle = new BMap.Polygon([new BMap.Point(pStart.lng, pStart.lat),new BMap.Point(pEnd.lng, pStart.lat),new BMap.Point(pEnd.lng, pEnd.lat),new BMap.Point(pStart.lng, pEnd.lat)], {strokeColor: "blue", strokeWeight: 2, strokeOpacity: 0.5}); // 开启(关闭)点线面的编辑(可以拖拽，移动点)polygon.enableEditing()polygon.disableEditing()// 文字labelvar opts = { position : new BMap.Point(116.417854,39.921988), // 指定文本标注所在的地理位置 offset : new BMap.Size(30, -30) //设置文本偏移量}var label = new BMap.Label("欢迎使用百度地图，这是一个简单的文本标注哦~", opts); // 创建文本标注对象label.setStyle({ color : "red", fontSize : "12px", height : "20px", lineHeight : "20px", fontFamily:"微软雅黑"}); // 覆盖物显示，隐藏marker.show()marker.hide()// 添加覆盖物 map.addOverlay(marker); // 清除覆盖物map.clearOverlays();
删除指定覆盖物
getOverlays方法可以获取 覆盖物数组，getLabel方法可以，获取他的label
function deletePoint(){ var allOverlay = map.getOverlays(); for (var i = 0; i < allOverlay.length -1; i++){ if(allOverlay[i].getLabel().content == "我是id=1"){ map.removeOverlay(allOverlay[i]); return false; } } }
marker 自定义icon
// 创建小狐狸iconvar pt = new BMap.Point(116.417, 39.909);var myIcon = new BMap.Icon("http://lbsyun.baidu.com/jsdemo/img/fox.gif", new BMap.Size(300,157));var marker2 = new BMap.Marker(pt,{icon:myIcon}); // 创建标注map.addOverlay(marker2);
加载海量点
// data source var data = {"data":[[74.438,39.006,1]]}if (document.createElement('canvas').getContext) { // 判断当前浏览器是否支持绘制海量点 var points = []; // 添加海量点数据 for (var i = 0; i < data.data.length; i++) { points.push(new BMap.Point(data.data[i][0], data.data[i][1])); } var options = { size: BMAP_POINT_SIZE_SMALL, shape: BMAP_POINT_SHAPE_STAR, color: '#d340c3' } var pointCollection = new BMap.PointCollection(points, options); // 初始化PointCollection pointCollection.addEventListener('click', function (e) { alert('单击点的坐标为：' + e.point.lng + ',' + e.point.lat); // 监听点击事件 }); map.addOverlay(pointCollection); // 添加Overlay} else { alert('请在chrome、safari、IE8+以上浏览器查看本示例');}
两点之间 画弧线 圆弧
// 引入一个库 <script type="text/javascript" src="http://api.map.baidu.com/library/CurveLine/1.5/src/CurveLine.min.js"></script> var points = []points.push( new BMap.Point(116.432045,39.910683) )points.push( new BMap.Point(120.129721,30.314429) )points.push( new BMap.Point(121.491121,25.127053) )var curve = new BMapLib.CurveLine(points, {strokeColor:"blue", strokeWeight:3, strokeOpacity:0.5}); //创建弧线对象map.addOverlay(curve); //添加到地图中curve.enableEditing(); //开启编辑功能 // centre:椭圆中心点,X:横向经度,Y:纵向纬度function add_oval(centre,x,y){ var assemble= [] var angle; var dot; var tangent=x/y; for(i=0;i<36;i++) { angle = (2* Math.PI / 36) * i; dot = new BMap.Point(centre.lng+Math.sin(angle)*y*tangent, centre.lat+Math.cos(angle)*y); assemble.push(dot); } return assemble;}var oval = new BMap.Polygon(add_oval(point,0.1,0.3), {strokeColor:"blue", strokeWeight:6, strokeOpacity:0.5});map.addOverlay(oval);
画行政区
function getBoundary(){ var bdary = new BMap.Boundary(); console.log(bdary) bdary.get("上海市徐汇区", function(rs){ //获取行政区域 map.clearOverlays(); //清除地图覆盖物 // rs.boundaries 是一个数组，每个元素，是地理位置的字符串 "12,12;123,23" var count = rs.boundaries.length; if (count === 0) { alert('未能获取当前输入行政区域'); return ; } console.log(rs.boundaries) var pointArray = []; for (var i = 0; i < count; i++) { var ply = new BMap.Polygon(rs.boundaries[i], { strokeWeight: 2, strokeColor: "#ff0000", fillColor: 'blue' } ); //建立多边形覆盖物 map.addOverlay(ply); //添加覆盖物 pointArray = pointArray.concat(ply.getPath()); console.log(pointArray) } map.setViewport(pointArray); //调整视野 addlabel(); });}
自定义覆盖物
// 复杂的自定义覆盖物function ComplexCustomOverlay(point, text, mouseoverText){ this._point = point; this._text = text; this._overText = mouseoverText;}ComplexCustomOverlay.prototype = new BMap.Overlay();ComplexCustomOverlay.prototype.initialize = function(map){ this._map = map; var div = this._div = document.createElement("div"); div.style.position = "absolute"; div.style.zIndex = BMap.Overlay.getZIndex(this._point.lat); div.style.backgroundColor = "#EE5D5B"; div.style.border = "1px solid #BC3B3A"; div.style.color = "white"; div.style.height = "18px"; div.style.padding = "2px"; div.style.lineHeight = "18px"; div.style.whiteSpace = "nowrap"; div.style.MozUserSelect = "none"; div.style.fontSize = "12px" var span = this._span = document.createElement("span"); div.appendChild(span); span.appendChild(document.createTextNode(this._text)); var that = this; var arrow = this._arrow = document.createElement("div"); arrow.style.background = "url(http://map.baidu.com/fwmap/upload/r/map/fwmap/static/house/images/label.png) no-repeat"; arrow.style.position = "absolute"; arrow.style.width = "11px"; arrow.style.height = "10px"; arrow.style.top = "22px"; arrow.style.left = "10px"; arrow.style.overflow = "hidden"; div.appendChild(arrow); div.onmouseover = function(){ this.style.backgroundColor = "#6BADCA"; this.style.borderColor = "#0000ff"; this.getElementsByTagName("span")[0].innerHTML = that._overText; arrow.style.backgroundPosition = "0px -20px"; } div.onmouseout = function(){ this.style.backgroundColor = "#EE5D5B"; this.style.borderColor = "#BC3B3A"; this.getElementsByTagName("span")[0].innerHTML = that._text; arrow.style.backgroundPosition = "0px 0px"; } mp.getPanes().labelPane.appendChild(div); return div;}ComplexCustomOverlay.prototype.draw = function(){ var map = this._map; var pixel = map.pointToOverlayPixel(this._point); this._div.style.left = pixel.x - parseInt(this._arrow.style.left) + "px"; this._div.style.top = pixel.y - 30 + "px";}var txt = "银湖海岸城", mouseoverTxt = txt + " " + parseInt(Math.random() * 1000,10) + "套" ;var myCompOverlay = new ComplexCustomOverlay(new BMap.Point(116.407845,39.914101), "银湖海岸城",mouseoverTxt);mp.addOverlay(myCompOverlay);
点聚合(放大缩小)
<script type="text/javascript" src="http://api.map.baidu.com/library/TextIconOverlay/1.2/src/TextIconOverlay_min.js"></script><script type="text/javascript" src="http://api.map.baidu.com/library/MarkerClusterer/1.2/src/MarkerClusterer_min.js"></script>// markers 是一个marker数组 var markerClusterer = new BMapLib.MarkerClusterer(map, {markers:markers});
矢量图 图标
var vectorFCArrow = new BMap.Marker(new BMap.Point(point.lng-0.01,point.lat), { // 初始化方向向上的闭合箭头 icon: new BMap.Symbol(BMap_Symbol_SHAPE_FORWARD_CLOSED_ARROW, { scale: 5, strokeWeight: 1, rotation: 0,//顺时针旋转30度 fillColor: 'red', fillOpacity: 0.8 })});var vectorStar = new BMap.Marker(new BMap.Point(point.lng+0.03,point.lat-0.03), { // 初始化五角星symbol icon: new BMap.Symbol(BMap_Symbol_SHAPE_STAR, { scale: 5, fillColor: "pink", fillOpacity: 0.8 })});
信息弹窗
var infoWindow = new BMap.InfoWindow("地址：北京市东城区王府井大街88号乐天银泰百货八层", { width : 200, // 信息窗口宽度 height: 100, // 信息窗口高度 title : "海底捞王府井店" , // 信息窗口标题 enableMessage:true,//设置允许信息窗发送短息 message:"亲耐滴，晚上一起吃个饭吧？戳下面的链接看下地址喔~"}); marker.addEventListener("click", function(){ map.openInfoWindow(infoWindow,point); //开启信息窗口});
鼠标右键
除了地图，marker也支持加右键
var menu = new BMap.ContextMenu(); var txtMenuItem = [ { text:'放大', callback:function(){map.zoomIn()} }, { text:'缩小', callback:function(){map.zoomOut()} } ]; for(var i=0; i < txtMenuItem.length; i++){ menu.addItem(new BMap.MenuItem(txtMenuItem[i].text,txtMenuItem[i].callback,100)); } map.addContextMenu(menu);
鼠标测距
// 引入插件 <script type="text/javascript" src="http://api.map.baidu.com/library/DistanceTool/1.2/src/DistanceTool_min.js"></script>var myDis = new BMapLib.DistanceTool(map);map.addEventListener("load",function(){ myDis.open(); //开启鼠标测距 //myDis.close(); //关闭鼠标测距大}); // 获取点击点坐标 map.addEventListener("click",function(e){ alert(e.point.lng + "," + e.point.lat);});