我使用的是开放层2
这是我的代码
<!DOCTYPE html>
<html lang="en" dir="ltr">
<head>
<meta charset="utf-8">
<title>webgis</title>
<script type="text/javascript" src="OpenLayers.js"></script>
<style>
div {
height: 641px;
}
</style>
</head>
<body>
<div id="map" style="">
<script type="text/javascript">
map = new OpenLayers.Map("map",{projection:new OpenLayers.Projection("EPSG:900913")})
osmLayer=new OpenLayers.Layer.OSM("OSM")
map.addLayer(osmLayer)
map.setCenter([0,0],1)
controls=[new OpenLayers.Control.OverviewMap(),
new OpenLayers.Control.MousePosition(),
new OpenLayers.Control.LayerSwitcher()]
map.addControls(controls)
wms=new OpenLayers.Layer.WMS("iran",
"http://localhost:8080/geoserver/wms/",
{LAYERS:'python:iran_location'},
{isBaseLayer:false});
map.addLayer(wms)
</script>
</div>
</body>
</html>
所以当我打开浏览器时
首先显示openstreetmap
它会在几秒钟内消失,只显示一层
答案 0 :(得分:1)
如果你想看到顶层下面的底层,顶层需要一些不透明度,你也可以尝试使WMS的白色背景透明,例如
wms = new OpenLayers.Layer.WMS("iran",
"http://localhost:8080/geoserver/wms/",
{LAYERS:'python:iran_location', transparent: true},
{opacity: 0.5, isBaseLayer:false});