Dear All, I have spent some time investigating this isue with GeoServer trunk.
Here: http://jira.codehaus.org/browse/GEOS-3702 you can find a quick detailed report. I am particularly interested in FrankW feedback. Ciao, Simone Steven M. Ottens wrote: > > > On Dec 7, 2009, at 5:47 PM, Stephen Woodbridge wrote: > >> Steven M. Ottens wrote: >>> >>> I know there have been speed tests between different WMS services, >>> but I'm wondering has there been any data-quality/accuracy test been >>> done between WMS and/or WCS services? >> >> I wonder if this is the difference between pixel as a point versus pixel >> as an area. Mapserver uses gdal to handle GeoTiff files and Frank has put >> a lot of effort in Gdal to handle this correctly. >> > That's our feeling as well. Andrea mentioned that there's an issue with > different interpretations on the location of a pixel (centre vs. > top-left). > >> Also, I'm surprised that there is any shift in mapserver because I do not >> think mapserver reprojects data if the in and out projections are the >> same. I can speak for the other services as I don't know how they work. > > I'll be doing more detailed tests tomorrow and will post an overview then > with the exact versions and configurations and results if people want to > reproduce them. I f people have suggestions for specific tests or > configurations I'm happy to apply those if possible. > > Going to test with the latest Geoserver nightly, Mapserver 5.6.0-rc1, > Deegree 2.3 rc1 on a windows 2003 machine. With two different GeoTIFFs > (one in epsg:4326 and one in epsg:3035) > > Steven_______________________________________________ > Discuss mailing list > Discuss@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/discuss > > -- View this message in context: http://n2.nabble.com/WCS-WMS-accuracy-tests-tp4127002p4148407.html Sent from the OSGeo Discuss mailing list archive at Nabble.com. _______________________________________________ Discuss mailing list Discuss@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/discuss