Thanks for the answers, finally I found the reason. I had an additional towgs parameter set in the layers projection block. Don't remember why I put it there, but it was causing the shift. I am using init=epsg:2169 as projection definition now as the only projection definition in the maps projection block and things are in place.
On Friday 05 June 2009 11:09:08 Milo van der Linden wrote: > Hello Frank, > > The shift probably has to do with the reference ellipsoid, If it is not > defined explicitly in the projection BUT is different from wgs84 you > should define the towgs parameter. > > You can check out a mail discussion describing a wgs84 ellipsoid shift > issue here: > http://postgis.refractions.net/pipermail/postgis-users/2006-October/013571. >html > > perhaps it will clear things. > > You can also check out map projections used in germany in more detail here: > http://www.mapref.org/MapProjectionsDE.html > > It may also help if you post your proj4 string or the EPSG code you use > so we can see the difference. > > Frank Broniewski wrote: > > Hello list, > > > > I am debugging a problem with my WMS server. I am serving > > administrational boundaries in a national reference system for use in > > different applications. > > > > Just yesterday I noticed a shift of the WMS layer to the east when I > > overlay the WMS layer with the original shapefile in ArcGIS. The shift is > > approx. 29m and I have no clue where to start looking for a solution. > > > > There is only one projection in the mapfile, and I set the view in ArcGis > > to the same projection. I checked the projection definition in ArcGis > > already to see if there is some mismatch but I couldn't find any. So I am > > rather clueless where to start looking for the reason of the shift. > > > > I checked also in OpenJump to see wether this is an ESRI effect, but > > there is the same shift in OpenJump > > > > Any hints are welcome ... > > > > Frank > > _______________________________________________ > > mapserver-users mailing list > > mapserver-users@lists.osgeo.org > > http://lists.osgeo.org/mailman/listinfo/mapserver-users _______________________________________________ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
