Hi, We had two use cases a few weeks ago: application is working with a UTM projection epsg:3067 and it should show UTM coordinates of cursor location in one coordinate box but also WGS84 lat/lon coordinates in another coordinate box real time. And users should be able to feed manually coordinates in tree systems: WGS84, UTM based epsg:3067 and Finnish national epsg:2393. This time we had to do conversion outside OpenJUMP.
-Jukka- -----Alkuperäinen viesti----- Lähettäjä: Stefan Steiniger [mailto:sst...@geo.uzh.ch] Lähetetty: ke 3.2.2010 19:29 Vastaanottaja: OpenJump develop and use Aihe: Re: [JPP-Devel] Proj4j - Martin steps ahead yep I agree here. I would say OJ offers options for assigning projections and doing transformations on a functional basis - i.e. no on the fly stuff? At least this is the simple way to start with. Though, we may think then about new measure tools. Sunburned Surveyor wrote: > 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 <mbda...@refractions.net> 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 >>> Jump-pilot-devel@lists.sourceforge.net >>> 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 >>> Jump-pilot-devel@lists.sourceforge.net >>> 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 >> Jump-pilot-devel@lists.sourceforge.net >> 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 > Jump-pilot-devel@lists.sourceforge.net > 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 Jump-pilot-devel@lists.sourceforge.net 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 Jump-pilot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel
