[gdal-dev] Geocentric Coordinate System Support

Ben Discoe ben at vterrain.org
Tue Aug 23 18:38:22 EDT 2011


Thanks for pointing me to the API documentation (which i had seen) and the
python unit tests (which i had not - very interesting!)  Unfortunately,
neither shows the SetVertCS method actually being called.

Thanksfully, this is the open source world :), so i am able to step through
OGR's internal methods (like SetEPSGVertCS) with a debugger to guess how
they actually work / should be called.  I have now done a fair bit of study
of the source, and GDAL's .csv data files, and have some idea of the state
of things.  I'll describe my findings in a new thread.


> -----Original Message-----
> From: Even Rouault [mailto:even.rouault at mines-paris.org]
> Sent: Tuesday, August 23, 2011 11:33 AM
> To: gdal-dev at lists.osgeo.org
> Cc: Ben Discoe; 'Rodolfo Bonnin'
> Subject: Re: [gdal-dev] Geocentric Coordinate System Support
> Le mardi 23 août 2011 19:28:49, Ben Discoe a écrit :
> > My question is how
> > the geocentric support and vertical datums are supposed to work, e.g.
> > are valid arguments to SetVertCS which can produce a valid result when
> > transforming from geocentric?
> Several links that may help you :
> http://trac.osgeo.org/gdal/browser/trunk/autotest/osr/osr_basic.py
> http://trac.osgeo.org/gdal/browser/trunk/autotest/osr/osr_compd.py

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