WMS query gets error 400

[Eddy]

I'm using GeoServer 1.7.0 with GeoWebCache plugin. I set port 8090 for GeoServer, added

<context-param>

<param-name>GEOSERVER_WMS_URL</param-name>
<param-value>http://localhost:8090/geoserver/wms?request=GetCapabilities</param-value>

</context-param>

in the web.xml. The demo url of GeoWebCache works:

http://localhost:8090/geoserver/gwc/demo

But when I tried WMS query doesn't work:

http://localhost:8090/geoserver/gwc/service/wms?bbox=-127.61950064999999,23.7351786,-64.08177035,50.592523400000005&styles=&Format=image/png&request=GetMap&version=1.1.1&layers=topp:states&width=1024&height=1024&srs=EPSG:4326

The IE returned the error message:

400: The bounds resulted in a resolution of 0.24819425898437497 which does not match any of the available ones [0.703125, 0.3515625, 0.17578125, 0.087890625, 0.0439453125, 0.02197265625, 0.010986328125, 0.0054931640625, 0.00274658203125, 0.001373291015625, 6.866455078125E-4, 3.4332275390625E-4, 1.71661376953125E-4, 8.58306884765625E-5, 4.291534423828125E-5, 2.1457672119140625E-5, 1.0728836059570312E-5, 5.364418029785156E-6, 2.682209014892578E-6, 1.341104507446289E-6, 6.705522537231445E-7, 3.3527612686157227E-7, 1.6763806343078613E-7, 8.381903171539307E-8, 4.190951585769653E-8, 2.0954757928848267E-8, 1.0477378964424133E-8, 5.238689482212067E-9, 2.6193447411060333E-9, 1.3096723705530167E-9, 6.548361852765083E-10]

Do you have any idea to fix it? Thanks.

[arneke]

Hi, please use the geowebcache-user mailinglist for questions that are not bugs.

Caching tiles means that the requests from your client must also conform to those tiles, see http://wiki.osgeo.org/wiki/WMS_Tiling_Client_Recommendation

The problem above is that you are requesting 1024x1024 images, not the 256x256 that are stored by geowebcache.

If you want to just cache arbitrary images you should use an HTTP level cache, like Squid or Varnish Cache.