OpenLayers和geowebcache结合
采用
geowebcache
缓存地图
1
.把
geowebcache
服务放到
tomcat
应用中,假设和
wms
服务放在同一个
tomcat
中,在
geowebcache/WEB-INF
下面找到
geowebcache-servlet.xml
在这个文件中有一段:
<bean id="gwcWMSConfig" class="org.geowebcache.config.GetCapabilitiesConfiguration">
<constructor-arg ref="gwcGridSetBroker"/>
<!-- The URL to the WMS GetCapabilities document -->
<constructor-arg value="http://localhost:8000/wmsserver111/servlet/wms"/>
//替换成wms实际的url地址
。。。
</bean>
2.在
geowebcache/WEB-INF/classes
中找到
geowebcache.xml
文件,打开文件,在
<layers>
标签中添加一个
<wmsLayer>
,如:
<wmsLayer>
<name>gz</name>
<metaInformation>
<title>gz</title>
<description>gz</description>
</metaInformation>
<mimeFormats><string>image/jpeg</string><string>image/gif</string><string>image/png</string></mimeFormats>
<!-- Grid Subset Example -->
<gridSubsets>
<gridSubset>
<gridSetName>EPSG:4326</gridSetName>
<extent>
<coords>
<double>112.806</double>
<double>22.567</double>
<double>114.287</double>
<double>24.067</double>
</coords>
</extent>
</gridSubset>
</gridSubsets>
<wmsUrl>
<string>http://localhost:8000/wmsserver111/servlet/wms</string>
</wmsUrl>
<wmsLayers>layers/gz/xzqj,layers/gz/ld,layers/gz/sx,layers/gz/jmd,layers/gz/gsgl,layers/gz/gd,layers/gz/sd,layers/gz/ptgl,layers/gz/ybjd,layers/gz/cgd,layers/gz/zgd,layers/gz/zfjg</wmsLayers>
//此处是mapxtreme480\resources\layers下面的命名资源
<transparent>true</transparent>
<bgColor></bgColor>
<expireCacheList>
<expirationRule minZoom="10" expiration="600" />
</expireCacheList>
<expireClientsList>
<expirationRule minZoom="0" expiration="7200" />
</expireClientsList>
</wmsLayer>
3
.编写
js
代码,其他代码不变修改如下:代码见:http://ninggy.iteye.com/blog/617150
var tiled = new OpenLayers.Layer.WMS("背景图",
"http://localhost:8000/geowebcache/service/wms?LAYERS=gz", {
layers : 'gz',
format : format
}, {
buffer : 0,
displayOutsideMaxExtent : true,
tileSize : new OpenLayers.Size(256, 256)
});
转载自:https://blog.csdn.net/ning947/article/details/83811457