[Gdal-dev] warping from lambert to mercator

[Ed McNierney]

Keith -

Sounds good!  Transverse Mercator and Mercator are not exactly the same
thing <g>.  You do need to make sure you avoid the undefined cases of
latitude=+/-90 degree, but I presume your input images stop at some
reasonable distance from the poles.  Let us know if you need more help.

	- Ed

Ed McNierney
President and Chief Mapmaker
TopoZone.com / Maps a la carte, Inc.
73 Princeton Street, Suite 305
North Chelmsford, MA  01863
Phone: +1 (978) 251-4242
Fax: +1 (978) 251-1396
ed at topozone.com 

-----Original Message-----
From: gdal-dev-bounces at lists.maptools.org
[mailto:gdal-dev-bounces at lists.maptools.org] On Behalf Of Keith
Wannamaker
Sent: Monday, January 02, 2006 8:22 PM
To: gdal-dev at lists.maptools.org
Subject: Re: [Gdal-dev] warping from lambert to mercator

Hi Ed, I didn't realize that transverse mercator behaved more like a
lambert projection, with curved parallels.  When I warped to simply 
+proj=merc, the resulting image was indeed correct with parallel
parallels and meridians.  It always helps to use the correct projection.

  So the answer to my question was, yes, gdalwarp will accomplish what I
described (and, in fact, does a darn good job at it).

Thanks,
Keith


Ed McNierney wrote:
> Keith -
> 
> Could you give us the command line or the code you're using to make 
> the conversion?
> 
> 	- Ed
_______________________________________________
Gdal-dev mailing list
Gdal-dev at lists.maptools.org
http://lists.maptools.org/mailman/listinfo/gdal-dev