Hi,

Impossible to say with this information, but I have managed to get such a 
result by using accidentally different settings for GeoWebCache and on the 
OpenLayers side for out own tileset grid. I would check first that the 
OpenLayers maxExtent and resolutions suit with GWC. But if you are using 
standart EPSG:4326 and Google grids then perhaps it is not your problem. It 
would really be best to test first with something else than OpenLayers so it 
would be possible to separate the possible GWC errors from coding errors on the 
client side. Unfortunately I cannot recommend any super good tool. UDig can 
read from WGS in WMS-C mode so that might be one candidate.

-Jukka Rahkonen-

Robert Buckley  wrote:

 Hi,

I am trying to serve a layer through geowebcache. The layer is defined as 
EPSG:4326 and comes from a Postgis store.
OpenLayers defines the map as EPSG:900913 (Google Mercator)

when the layer in served with geowebcache it is missaligned. I have changed the 
map projection to 4326, 900913 and 3857 but nothing re-aligns the layer.

The comparison between normal wms and geowebcache can be seen here..

http://maps.zgb.de/eeg/rrop.html

Is this a problem with the google mercator projection or with openlayers?

yours,

Rob
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