前言：最近要使用百度地圖實(shí)現(xiàn)樓盤(pán)可視化的功能，因此最基礎(chǔ)的功能就是將地圖網(wǎng)格化以后實(shí)現(xiàn)不同地域的樓盤(pán)劃分；
1，自行去百度地圖的開(kāi)放平臺(tái)申請(qǐng)秘鑰哈，這里我就把自己的秘鑰貼出來(lái)了；ak=A3CklGvnFOjkAzKzay2dySgfdig0GKz4
2，新建一個(gè)簡(jiǎn)單頁(yè)面，下面我把自己的頁(yè)面貼出來(lái)
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no"/>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<style type="text/css">
html {
height: 100%
}
body {
height: 100%;
margin: 0px;
padding: 0px
}
#container {
height: 100%
}
</style>
<script type="text/javascript" src="http://api.map.baidu.com/api?v=2.0&ak=A3CklGvnFOjkAzKzay2dySgfdig0GKz4"></script>
<script type="text/javascript" src="ziroom-map.js"></script>
</head>
<body>
<p id="container"></p>
<script>
var myMap = new ZMap("container"); </script>
</body>
</html>3,其中引入了ziroom-map.js，這是我們公司的名字啦，我把代碼貼出來(lái)，這個(gè)js是封裝了百度的js的api的，有人如果要問(wèn)為什么封裝，直接使用不可以么？那我的回答是：封裝可以將具體業(yè)務(wù)和地圖相結(jié)合，使代碼更清晰，并且可以持久化當(dāng)前地圖的狀態(tài)，利于實(shí)現(xiàn)對(duì)地圖的操作。
var ZMap = function (id, center, level) {
this.initCenter = new ZPoint(116.404, 39.915);//初始化的中心點(diǎn)，同時(shí)為了定義網(wǎng)格的中心點(diǎn)
this.id = id;//p的id
this.level = level ? level : 13;//地圖級(jí)別
this.center = center ? center : this.initCenter;//中心點(diǎn)
this.map = null;//百度地圖實(shí)例
this.xgrids = [];//經(jīng)線
this.ygrids = [];//緯線
this.beSelectBounds = {};
this.bounds = null;//當(dāng)前地圖的四個(gè)頂點(diǎn)
this.span = null;//當(dāng)前網(wǎng)格的跨度
this.init();
}
ZMap.prototype = {
init: function () {//全局初始化
var zMap = this;
this.map = new BMap.Map(this.id);
this.map.centerAndZoom(this.center.point, this.level);
this.map.enableScrollWheelZoom();
this.map.disableInertialDragging();
this.map.addControl(new BMap.NavigationControl({
anchor: BMAP_ANCHOR_BOTTOM_RIGHT,
type: BMAP_NAVIGATION_CONTROL_ZOOM
})); //縮放按鈕
this.map.addControl(new BMap.ScaleControl({anchor: BMAP_ANCHOR_BOTTOM_LEFT, offset: new BMap.Size(80, 25)})); //比例尺
this.map.disableDoubleClickZoom();
this.map.setMapStyle({style: 'googlelite'});
this.initProperty();
this.initGrid();
//添加移動(dòng)后的點(diǎn)擊事件
this.map.addEventListener("dragend", function () {
zMap.initProperty();
zMap.initGrid();
});
//添加放大或縮小時(shí)的事件
this.map.addEventListener("zoomend", function () {
zMap.initProperty();
zMap.initGrid();
});
//設(shè)置點(diǎn)擊事件
this.map.addEventListener("click", function (e) {
var point = e.point;
//獲取當(dāng)前點(diǎn)是在哪個(gè)區(qū)塊內(nèi),獲取正方形的四個(gè)頂點(diǎn)
var points = zMap.getGrid(point);
//判斷當(dāng)前區(qū)域是否已經(jīng)被選中過(guò)，如果被選中過(guò)則取消選中
var key = '' + points[0].lng + points[0].lat + points[2].lng + points[2].lat;//使用兩個(gè)點(diǎn)的坐標(biāo)作為key
if (zMap.beSelectBounds[key]) {
zMap.map.removeOverlay(zMap.beSelectBounds[key]);
delete zMap.beSelectBounds[key];
return;
}
var polygon = new BMap.Polygon(points, {strokeColor: "red", strokeWeight: 2, strokeOpacity: 0.5});
zMap.map.addOverlay(polygon);
zMap.beSelectBounds[key] = polygon;
});
},
initProperty: function () {//初始化當(dāng)前地圖的狀態(tài)
this.level = this.map.getZoom();
this.bounds = {
x1: this.map.getBounds().getSouthWest().lng,
y1: this.map.getBounds().getSouthWest().lat,
x2: this.map.getBounds().getNorthEast().lng,
y2: this.map.getBounds().getNorthEast().lat
};
this.span = this.getSpan();//需要使用level屬性
},
initGrid: function () {//初始化網(wǎng)格
var zMap = this;
//將原來(lái)的網(wǎng)格線先去掉
for (var i in zMap.xgrids) {
this.map.removeOverlay(zMap.xgrids[i]);
}
zMap.xgrids = [];
for (var i in zMap.ygrids) {
this.map.removeOverlay(zMap.ygrids[i]);
}
zMap.ygrids = [];
//獲取當(dāng)前網(wǎng)格跨度
var span = zMap.span;
//初始化地圖上的網(wǎng)格
for (var i = zMap.bounds.x1 + (zMap.initCenter.point.lng - zMap.bounds.x1) % span.x - span.x; i < zMap.bounds.x2 + span.x; i += span.x) {
var polyline = new BMap.Polyline([
new BMap.Point(i.toFixed(6), zMap.bounds.y1),
new BMap.Point(i.toFixed(6), zMap.bounds.y2)
], {strokeColor: "black", strokeWeight: 1, strokeOpacity: 0.5});
zMap.xgrids.push(polyline);
zMap.map.addOverlay(polyline);
}
for (var i = zMap.bounds.y1 + (zMap.initCenter.point.lat - zMap.bounds.y1) % span.y - span.y; i < zMap.bounds.y2 + span.y; i += span.y) {
var polyline = new BMap.Polyline([
new BMap.Point(zMap.bounds.x1, i.toFixed(6)),
new BMap.Point(zMap.bounds.x2, i.toFixed(6))
], {strokeColor: "black", strokeWeight: 1, strokeOpacity: 0.5});
zMap.ygrids.push(polyline);
zMap.map.addOverlay(polyline);
}
},
getSpan: function () {//獲取網(wǎng)格的跨度
var scale = 0.75;
var x = 0.00064;
for (var i = this.level; i < 19; i++) {
x *= 2;
}
var y = parseFloat((scale * x).toFixed(5));
return {x: x, y: y};
},
getGrid: function (point) {//返回當(dāng)前點(diǎn)在所在區(qū)塊的四個(gè)頂點(diǎn)
var zMap = this;
//先找出兩條縱線坐標(biāo)
var xpoints = this.xgrids.map(function (polyline) {
return polyline.getPath()[0].lng;
}).filter(function (lng) {
return Math.abs(lng - point.lng) <= zMap.span.x;
}).sort(function (a, b) {
return a - b;
}).slice(0, 2);
//再找出兩條橫線的坐標(biāo)
var ypoints = this.ygrids.map(function (polyline) {
return polyline.getPath()[0].lat;
}).filter(function (lat) {
return Math.abs(lat - point.lat) <= zMap.span.y;
}).sort(function (a, b) {
return a - b;
}).slice(0, 2);
return [
new BMap.Point(xpoints[0], ypoints[0]),
new BMap.Point(xpoints[0], ypoints[1]),
new BMap.Point(xpoints[1], ypoints[1]),
new BMap.Point(xpoints[1], ypoints[0])
];
},
reset: function () {//重置
this.map.reset();
}
}
var ZPoint = function (x, y, code) {
this.code = code;
this.point = new BMap.Point(x, y);
}上面是我整理給大家的，希望今后會(huì)對(duì)大家有幫助。
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