On Thu, Apr 28, 2011 at 11:37 AM, Andrea Aime <[email protected]> wrote: > Hi, > some months ago I started a discussion on GeoServer devel about > adding support for a new EPSG code, EPSG:0.
Unfortunately I'm having troubles following this thread since my POP server is down due to a fire in the hosting center, however I'm able to follow this partly on the Nabble archives: http://osgeo-org.1803224.n2.nabble.com/Adding-support-for-a-new-EPSG-code-EPSG-0-td6312618.html I see that both Ben and Christian voted it down though... with an invalid vote btw. Per our procedures everyone voting -1 has to provide an alternative, just saying "no" is not allowed: http://docs.geotools.org/latest/developer/guide/procedures/proposal.html#voting I understand the concern about using a reserved code, it was chosen anyways because EPSG never used anything below 2000 and it's the most practical solution, a code that everybody can remember and associate with its wildcard nature. Anyways, let's look at the alternatives. If we stick by EPSG recommendations we need a code above 32767. Can't find any code that can be easily associated with "wildcard cartesian" concept, but random easy to remember codes could be: 43234 99999 100000 100001 999999 Another alternative is to go the other side and use EPSG:-1 instead. Looks like a disappointed smiley, pretty much fits with my feelings for not being able to use the simplest solution, and I guess also the one of people not being able to georeference their data. Nobody ever used negative numbers, so there is no possibility of a conflict. I don't think any system is prepared to deal with -1, at the same time I can't think of anyone explicitly disallowing negative codes. Btw, EPSG has two cartesian codes in the official database, but they are defined just as examples are are not really usable: http://www.spatialreference.org/ref/epsg/5806/ http://www.spatialreference.org/ref/epsg/5807/ Answering Ben's question, yes, whatever code we choose is going to be published in the capabilities, just like all other user defined codes in esri.properties are. WMS can be legitimately used also to serve non geoferenced data, we've seen users trying to publish CAD data (floor plans) or high resolutions imagery such as painting scans that do not have any referencing in the world, we need to give this people a code instead of having them contiously hijack 4326 for that purpose Cheers Andrea -- ------------------------------------------------------- Ing. Andrea Aime GeoSolutions S.A.S. Tech lead Via Poggio alle Viti 1187 55054 Massarosa (LU) Italy phone: +39 0584 962313 fax: +39 0584 962313 http://www.geo-solutions.it http://geo-solutions.blogspot.com/ http://www.youtube.com/user/GeoSolutionsIT http://www.linkedin.com/in/andreaaime http://twitter.com/geowolf ------------------------------------------------------- ------------------------------------------------------------------------------ WhatsUp Gold - Download Free Network Management Software The most intuitive, comprehensive, and cost-effective network management toolset available today. Delivers lowest initial acquisition cost and overall TCO of any competing solution. http://p.sf.net/sfu/whatsupgold-sd _______________________________________________ Geotools-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/geotools-devel
