On Tue, Jan 11, 2011 at 1:30 AM, Gabriel Roldán <[email protected]> wrote: > chiming in late due to vacations. > > The idea is sound and needed. I'm wondering if there's any conceptual > difference between your EPSG:0 CRS and the CRS:1 special CRS defined in > the WMS 1.3 spec (see section 6.7.2 and 6.7.3.5). If there's not we > should use CRS:1, but I think there is a difference in that CRS:1 > forcedly has a 0,0 coordinate origin and yours is tied to the layer > bounds as declared by the datastore? > > In any case, CRS:1 seems worth to support at some point. > > excerpt: > "6.7.3.5 Geographic information with undefined CRS > A server > may offer two-dimensional geographic information whose precise spatial > reference is undefined. For example, a hand-drawn historical map may > represent an area of the Earth but not employ a modern coordinate > reference system, and an aerial photograph may not be precisely > georeferenced. Such types of graphical information shall be treated as > an image, and the Map CS label “CRS:1” shall be used when declaring the > Layer CRS of such an object. Clients should not attempt to overlay a > layer for which CRS=CRS:1 with another layer."
Ah ha, nice to know about this one. Might be a good fit, there are a few things to double check before going down this road: - in our code there is a widespread assumption that all codes are in the EPSG authority, consider for the example the axis flipping code in WFS - EPSG:0 would also be usable as urn:ogc:, the same cannot be said about CRS:1 - what is the behavior of CRS:1 regards to reprojection? EPSG:0 would not throw exception in case of reprojection, would just never change the coordinate values In any case, the major concern about CRS:1 is its usability in WFS/WCS, I did not check in detail but the gut feeling is that it might require extensive changes to be used there. Cheers Andrea -- Ing. Andrea Aime Technical Lead GeoSolutions S.A.S. Via Poggio alle Viti 1187 55054 Massarosa (LU) Italy phone: +39 0584962313 fax: +39 0584962313 http://www.geo-solutions.it http://geo-solutions.blogspot.com/ http://www.linkedin.com/in/andreaaime http://twitter.com/geowolf ----------------------------------------------------- ------------------------------------------------------------------------------ Gaining the trust of online customers is vital for the success of any company that requires sensitive data to be transmitted over the Web. Learn how to best implement a security strategy that keeps consumers' information secure and instills the confidence they need to proceed with transactions. http://p.sf.net/sfu/oracle-sfdevnl _______________________________________________ Geoserver-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/geoserver-devel
