Hi Brent, Thanks for your reply. Converting to a 0 - 360 longitude span seems like it would work, but as part of my map contains imagery data, I think it would probably be best if I could define a new projection in my epsg file that contained the required parameters. Is that possible? I have implemented the DateLine wrap in OpenLayers, and it works well there. Unfortunately, I also need to generate some map images dynamically via mapscript, and this is where I have the most problems.
Thanks again, Roger -- On Thu, Mar 5, 2009 at 1:54 PM, Brent Wood <[email protected]> wrote: > > > Welcome to my world... > > > The simplest way is, if you can, convert your longitutes to a 0-360 instead > of +-180 space. If you use PostGIS the shift_longitude function works, Proj.4 > can also be told which space to use for western hemisphere longitudes and > generate longs in the 0-360 space. > > Alternatively, if you stick to +-180, you can use OpenLayers at the client > end, as this has a switch available to work across 180. > > > HTH, > > Brent Wood > > > --- On Fri, 3/6/09, Roger André <[email protected]> wrote: > >> From: Roger André <[email protected]> >> Subject: [mapserver-users] Problems mapping regions that span Dateline >> To: "[email protected]" <[email protected]> >> Date: Friday, March 6, 2009, 8:30 AM >> Hi All, >> >> I'm having some problems mapping some regions of the >> world that span >> the Dateline. I have several examples of this, but using >> one, the UN >> subregion defined as being "South Pacific", as an >> example illustrates >> the problem nicely. This region has the following extents: >> >> Corner Coordinates: >> Upper Left (-180.0000000, 28.2333333) >> Lower Left (-180.0000000, -29.0666667) >> Upper Right ( 180.0000000, 28.2333333) >> Lower Right ( 180.0000000, -29.0666667) >> >> The map that is generated using these extents with EPSG >> 4326 spans the >> entire globe, and I'd like to find a way to show the >> are in a more >> concise fashion. I have the same problem with New Zealand, >> and with >> the full extents of the USA. >> >> Hoping for some suggestions. >> >> Thanks, >> >> Roger >> _______________________________________________ >> mapserver-users mailing list >> [email protected] >> http://lists.osgeo.org/mailman/listinfo/mapserver-users > _______________________________________________ mapserver-users mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/mapserver-users
