<!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>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<script type="text/javascript" src="OpenLayers.js"></script>
<title>地图加载</title>
<script type="text/javascript">
var map;
function loadmap() {
map = new OpenLayers.Map('map', {});
var wms_layer_map = new OpenLayers.Layer.WMS(
'基础图层',
'http://vmap0.tiles.osgeo.org/wms/vmap0',
{ layers: 'basic' },
{ isBasicLayer: true }
);
var wms_layer_labels = new OpenLayers.Layer.WMS(
'地理标识',
'http://vmap0.tiles.osgeo.org/wms/vmap0',
{ Layers: 'clabel,ctylabel,statelabel', transparent: true },
{ visibility: true, opcity: 0.5 }
);
var wms_state_lines = new OpenLayers.Layer.WMS(
'国家线',
'http://labs.metacarta.com/wms/vmap0',
{ layers: 'stateboundary', transparent: true },
{ displayInLayerSwitcher: true, minScale: 13841995.078125 }
);
var wms_water_depth = new OpenLayers.Layer.WMS(
'水深',
'http://labs.metacarta.com/wms/vmap0',
{ layers: 'depthcontour', transparent: true },
{ opacity: 0.8 }
);
var wms_roads = new OpenLayers.Layer.WMS(
'道路',
'http://labs.metacarta.com/wms/vmap0',
{ layers: 'priroad,secroad,rail', transparent: true },
{ transistionEffect: 'resize' }
);
map.addLayers([
wms_layer_map,
wms_layer_labels,
wms_state_lines,
wms_roads,
wms_water_depth
]);
map.addControl(new OpenLayers.Control.LayerSwitcher({}));
map.setCenter(new OpenLayers.LonLat(-116, 23));
map.zoomTo(5);
}
//参数解释
//isBasicLayer:true 设置改图层为基础图层
//visibility：false 设置图层是否显示
//opacity：0.5 设置图层的透明度
//transistionEffect:'resize' 设置图层重新显示的时候，有resize动画效果
//minScale显示到的最小比例
//maxScale显示到的最大比例
//displayInLayerSwitcher:false 是否在图层选择器中出现
//map.zoomTo(9);设置地图的缩放级别
//map.getScale();获取地图的缩放级别
</script>
</head>
<body onload="loadmap();">
<div id="map" style="width: 500px; height: 500px; margin: auto;"></div>
</body>
</html>
