Hi Ian, > I'm no CRS expert - I've been battling with a thorny CRS/projection > related issue. > > I have a user requirement to provide a rotated map. So, the world > data is projected into a screen surface using MapViewport as normal, > but as one last step I need to be able to rotate the projected image. > It would appear that a 'cosmetic' rotation would be sufficient the > CRS/viewport is still doing an accurate projection. > > From my googling, I believe the most effective solution is to produce > a derived CRS that introduces a rotation operation - but I just can't > produce the correct data in the correct object types to drive the API. > > The degree of rotation to supply can vary from 0..360. > > I'd be most grateful if anybody can supply a snippet to solve this > challenge - or at least provide me with some good trigger-words to > feed into Google.
I am really not that expert in CRS issues. But since your issue is more a view-matter, I would not handle this problem in the crs. I would rather concatenate a translation-rotation-backtranslation of the thing. Not sure at which level though. Did you get any idea on this? Cheers, Andrea > cheers, > Ian > > > ------------------------------------------------------------------------------ > Live Security Virtual Conference > Exclusive live event will cover all the ways today's security and > threat landscape has changed and how IT managers can respond. Discussions > will include endpoint security, mobile security and the latest in malware > threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ > _______________________________________________ > GeoTools-GT2-Users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ GeoTools-GT2-Users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users
