[gdal-dev] Confused about coordinate transformations

[dev4cx4m9z at snkmail.com]

My program does MANY other things that GDAL can’t. I’m using GDAL as a small part of something much larger. I need to do the transformation at runtime.

 

Marc,

proj4 usually comes with the gdal library. Instead of coding your own program, first try the ogr2ogr utility[1] that comes with the gdal library.

[1]: http://www.gdal.org/ogr2ogr.html

On Tue, Oct 18, 2011 at 1:36 PM, <dev4cx4m9z at snkmail.com> wrote:

I have a GIS database with all coordinates stored in WGS84 datum. I am trying to translate the coordinates of the database to the datum of my map. I am creating two OGRSpatialReference, one for WGS84 and one for the current map. I am then creating an OGRCoordinateTransformation. When I do so I get a PROJ.4 error – “No PROJ.4 translation for destination SRS, coordinate transformation initialisation has failed”

 

Question – Do I HAVE to use PROJ.4 to do the translation? Can I not just load the SRS with a WKT? I wish to avoid PROJ.4 as I’m unsure how to build it.

 

_______________________________________

Marc Hillman, Melbourne, Australia

http://users.tpg.com.au/users/mhillman/

marc .hillman @ t p g . c o m . a u

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