[Gdal-dev] gdal to proj4 translation

Frank Warmerdam warmerdam at pobox.com
Thu Jul 24 14:26:24 EDT 2003

Alessandro Amici wrote:

> Frank,
>>Note that instead of explicitly handling PROJ.4 strings, you can just
>>instantiate an OGRCoordinateTransformation object with two coordinate
>>systems and it will take care of creating the PROJ.4 representations
>>internally where needed.  I would suggest you review the OGR Projections
>>   http://gdal.velocet.ca/projects/opengis/ogrhtml/osr_tutorial.html
> did i mention already that i love gdal and co.? especially the python 
> bindings?


Good to hear.

> BTW wuold the projection '+proj=geocent' be a special case for gdal/ogr?

Limited geocentric support was recently introduced in PROJ.4.  I don't
believe that OGRSpatialReference handles the geocentric WKT case for
mapping to/from PROJ.4 or other uses.  It would be logical to add this
at some point, though I generally have no use for it.   It would be a bit
of work, perhaps 4 hours, to do this properly though.

Best regards,
I set the clouds in motion - turn up   | Frank Warmerdam, warmerdam at pobox.com
light and sound - activate the windows | http://pobox.com/~warmerdam
and watch the world go round - Rush    | Geospatial Programmer for Rent

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