hi,
This is a follow up of my previous attempt to understand how to use
geowebcache(gwc) and use openlayers to visualize data.
I have been having problems with gwc and EPSG:900913 in openlayers. I want to
serve raster data over googlemaps, but cannot get geowebcache to work together
with openlayers in EPSG:900913
As a test, I have set up test layer called wgs84Point which is a postgis layer
with 3 points digitized in wgs84(EPSG:4326). I have fed it into geoserver and
have build two clients to visualize the points. One of the clients has a map
set up in wgs84 (EPSG:4326), the other identical map with Google (EPSG:900913).
http://maps.zgb.de/eeg/wgs84.html
http://maps.zgb.de/eeg/900913.html
Both maps contain the wms version of the points layer and also the geowebcache
version.
As can be seen, the WGS84 EPSG:4326 version lines both the wms and geowebcache
points perfectly.
from the geowebcache demo page in geoserver I can view the layer in both 900913
and 4326
here is one tile in EPSG:900913
http://maps.zgb.de/geoserver/gwc/service/wms?LAYERS=zgb%3Awgs84point&FORMAT=image%2Fpng&SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&STYLES=&EXCEPTIONS=application%2Fvnd.ogc.se_inimage&SRS=EPSG%3A900913&BBOX=1164288.8146777,6946597.1295898,1169180.7844873,6951489.0993994&WIDTH=256&HEIGHT=256
and the same point is EPSG:4326
http://maps.zgb.de/geoserver/gwc/service/wms?LAYERS=zgb%3Awgs84point&FORMAT=image%2Fpng&SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&STYLES=&EXCEPTIONS=application%2Fvnd.ogc.se_inimage&SRS=EPSG%3A4326&BBOX=10.532455444336,52.833938598633,10.533142089844,52.834625244141&WIDTH=256&HEIGHT=256
My Geoserver logs are giving me this...
2011-10-27 14:39:21,406 ERROR [geowebcache.GeoWebCacheDispatcher] - X,Y values
for the tile index were calculated to be {1081.4697265626, 1380.0979003904074}
which had to be rounded to {1081, 1380} and exceeds the threshold of 10%.
Perhaps the client is using the wrong origin ?
http://maps.zgb.de/geoserver/gwc/service/wms
which corresponds to the firebug output for the pink tiles..400: X,Y values for
the tile index were calculated to be {1081.4697265626, 1376.0979003905672}
which had to be rounded to {1081, 1376} and exceeds the threshold of 10%.
Perhaps the client is using the wrong origin ?
So I really don´t know where to look for solutions.
Any help is most welcome
yours,
Rob------------------------------------------------------------------------------
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