注意点:
1. openlayers里面图层聚合做了自动处理, 会根据地图上距离的返回要素个数, 通过个数来设定样式聚合样式进行显示
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>加载天地图</title>
<link href="ol/ol.css" rel="stylesheet" type="text/css" />
<script src="ol/ol.js" type="text/javascript"></script>
<style type="text/css">
html,
body {
margin: 0px;
padding: 0px;
}
#mapCon {
width: 100%;
height: 98%;
}
</style>
</head>