I found the way UDig handled projections to be a nightmare. Never could get it to work right. Now I use FW Tools instead. I'd prefer to see projections handled on a per-instance basis. Let the user keep track of what projection each layer is in. That is likely something he is doing anyways.
This approach will keep the code much simpler. I think even a stand-alone reprojection tool in Java packaged with OpenJUMP might even be the best way to go. Just my 2 cents. Landon On Wed, Feb 3, 2010 at 8:38 AM, Martin Davis <[email protected]> wrote: > Jukka, > > Do you know what lib spatiallite uses for projections? Do you have a > reference to the doc for it? > > It seems like it would be nice to have projections built right in to > JUMP. Maybe Proj4J can meet this need, since it's fairly simple and > lightweight. > > People will need to think about how coordinate systems are exposed in > JUMP. Is it just a facility for one-time transformation, with all > params supplied by the user? The next level would keep CRS information > with each layer, and automatically reproject imported data. The ultimate > (maybe?) level might be to keep data internally in its native CRS and > reproject only for display and other purposes. I think this last might > be more complex than its worth, however. I know uDig spend a loooong > time getting this right, and it might still be problematic. > > By the way, something that's not currently in Proj4J is support for > mapping to/from the huge variety of CRS specification formats which are > out there. This is a large piece of work, and at this point I don't > know when or how it might be accomplished. > > Rahkonen Jukka wrote: >> Hi, >> >> Projection support would be nice to have sometimes. By the way, the two new >> Spatialite plugins give now another alternatives. Spatialite databases >> which have been created with Spatialite-GUI contains support for more than >> 3000 projections by default. >> >> -Jukka- >> >> >> Stefan Steiniger wrote: >> >> >> So Guys - guess what: >> >> Martin revived Proj4j, i.e. Proj4 for Java >> >> http://lin-ear-th-inking.blogspot.com/2010/01/announcing-proj4j.html >> >> seems like we can start thinking about to seriously give OpenJUMP >> projection support (for those that don't use PostGIS - like me) ;) >> >> thank you Martin! >> >> stefan >> >> ------------------------------------------------------------------------------ >> The Planet: dedicated and managed hosting, cloud storage, colocation >> Stay online with enterprise data centers and the best network in the business >> Choose flexible plans and management services without long-term contracts >> Personal 24x7 support from experience hosting pros just a phone call away. >> http://p.sf.net/sfu/theplanet-com >> _______________________________________________ >> Jump-pilot-devel mailing list >> [email protected] >> https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel >> >> >> ------------------------------------------------------------------------------ >> The Planet: dedicated and managed hosting, cloud storage, colocation >> Stay online with enterprise data centers and the best network in the business >> Choose flexible plans and management services without long-term contracts >> Personal 24x7 support from experience hosting pros just a phone call away. >> http://p.sf.net/sfu/theplanet-com >> _______________________________________________ >> Jump-pilot-devel mailing list >> [email protected] >> https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel >> >> > > -- > Martin Davis > Senior Technical Architect > Refractions Research, Inc. > (250) 383-3022 > > > ------------------------------------------------------------------------------ > The Planet: dedicated and managed hosting, cloud storage, colocation > Stay online with enterprise data centers and the best network in the business > Choose flexible plans and management services without long-term contracts > Personal 24x7 support from experience hosting pros just a phone call away. > http://p.sf.net/sfu/theplanet-com > _______________________________________________ > Jump-pilot-devel mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel > ------------------------------------------------------------------------------ The Planet: dedicated and managed hosting, cloud storage, colocation Stay online with enterprise data centers and the best network in the business Choose flexible plans and management services without long-term contracts Personal 24x7 support from experience hosting pros just a phone call away. http://p.sf.net/sfu/theplanet-com _______________________________________________ Jump-pilot-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel
