前言：最近要使用百度地图实现楼盘可视化的功能，因此最基础的功能就是将地图网格化以后实现不同地域的楼盘划分；
1，自行去百度地图的开放平台申请秘钥哈，这里我就把自己的秘钥贴出来了；ak=A3CklGvnFOjkAzKzay2dySgfdig0GKz4
2，新建一个简单页面，下面我把自己的页面贴出来
<!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>
<div id="container"></div>
<script>
var myMap = new ZMap("container"); </script>
</body>
</html>
3,其中引入了ziroom-map.js，这是我们公司的名字啦，我把代码贴出来，这个js是封装了百度的js的api的，有人如果要问为什么封装，直接使用不可以么？那我的回答是：封装可以将具体业务和地图相结合，使代码更清晰，并且可以持久化当前地图的状态，利于实现对地图的操作。
var ZMap = function (id, center, level) {
this.initCenter = new ZPoint(116.404, 39.915);//初始化的中心点，同时为了定义网格的中心点
this.id = id;//div的id
this.level = level ? level : 13;//地图级别
this.center = center ? center : this.initCenter;//中心点
this.map = null;//百度地图实例
this.xgrids = [];//经线
this.ygrids = [];//纬线
this.beSelectBounds = {};
this.bounds = null;//当前地图的四个顶点
this.span = null;//当前网格的跨度
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
})); //缩放按钮
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();
//添加移动后的点击事件
this.map.addEventListener("dragend", function () {
zMap.initProperty();
zMap.initGrid();
});
//添加放大或缩小时的事件
this.map.addEventListener("zoomend", function () {
zMap.initProperty();
zMap.initGrid();
});
//设置点击事件
this.map.addEventListener("click", function (e) {
var point = e.point;
//获取当前点是在哪个区块内,获取正方形的四个顶点
var points = zMap.getGrid(point);
//判断当前区域是否已经被选中过，如果被选中过则取消选中
var key = '' + points[0].lng + points[0].lat + points[2].lng + points[2].lat;//使用两个点的坐标作为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 () {//初始化当前地图的状态
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属性
},
initGrid: function () {//初始化网格
var zMap = this;
//将原来的网格线先去掉
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 = [];
//获取当前网格跨度
var span = zMap.span;
//初始化地图上的网格
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 () {//获取网格的跨度
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) {//返回当前点在所在区块的四个顶点
var zMap = this;
//先找出两条纵线坐标
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);
//再找出两条横线的坐标
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);
}
总结：好了这篇随笔就这么多了，欢迎大家指正。
以上这篇使用百度地图实现地图网格的示例就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持脚本之家。
