Hi, The whole chapter is
"A WMS must support at least one CRS, and maps from multiple servers may be overlaid only if all the selected servers have at least one CRS in common. This International Standard does not mandate support for any particular Layer CRS(s). Instead, it only defines how CRSs are identified and discusses several optional Layer CRSs, in this clause and in Annex B. Map providers may support the CRSs that are most useful and appropriate to their geographic locale or information community. To maximize interoperability among servers, providers should also support geographic coordinates by geocentric coordinate systems such as “CRS:84” (see 6.7.3.2), “EPSG:4326” (see 6.7.3.3) or other ITRF-based systems." Clearly not mandatory. -Jukka Rahkonen- ________________________________ Andrea Aime wrote: On Thu, Apr 11, 2013 at 4:54 PM, Jonathan Moules <[email protected]<mailto:[email protected]>> wrote: I've had similar feelings in the past; ArcGIS defaults to CRS:84 if its there, ignoring whatever you specified or the native one is. I'm not sure if its possible, but the WMS spec says: To maximize interoperability among servers, providers should also support geographic coordinates by geocentric coordinate systems such as “CRS:84” (see 6.7.3.2), “EPSG:4326” (see 6.7.3.3) or other ITRF-based systems. So depending on what "should" means, it may be hard-coded. Hopefully someone knowledgeable about the implementation will chip in. It's definitely hard coded, and I have the feeling it's actually mandatory to pass the WMS compliance tests (but I haven't checked) Cheers Andrea -- == GeoServer training in Milan, 6th & 7th June 2013! Visit http://geoserver.geo-solutions.it<http://geoserver.geo-solutions.it/> for more information. == Ing. Andrea Aime @geowolf Technical Lead GeoSolutions S.A.S. Via Poggio alle Viti 1187 55054 Massarosa (LU) Italy phone: +39 0584 962313 fax: +39 0584 1660272 mob: +39 339 8844549 http://www.geo-solutions.it http://twitter.com/geosolutions_it ------------------------------------------------------- ------------------------------------------------------------------------------ Precog is a next-generation analytics platform capable of advanced analytics on semi-structured data. The platform includes APIs for building apps and a phenomenal toolset for data science. Developers can use our toolset for easy data analysis & visualization. Get a free account! http://www2.precog.com/precogplatform/slashdotnewsletter _______________________________________________ Geoserver-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/geoserver-users
