[MetaCRS] CS-Map RFC 1 - Creation of a GDC file to handle French grid files

[Frank Warmerdam]

Hugues, Norm, Didier,

Thanks for the answers to my questions.  It doesn't sound like there is any
immediate opportunity for sharing anything other than the original datum
shift grids between PROJ.4 and CS-Map but I will try and read up on .gdc
files some more to see if at some point we can take more direct advantage
of them in some cases.

I am still interested in "grid shift file preparation" tools being shared
within MetaCRS (though they might technically live in one of the subprojects).
I'm interested in Didier's mention of a more generic grid shift format.

On the one hand I find NTv2 pretty generally and it has the benefit of having
achieved fairly wide adoption.  But if there are serious issues with it, then
we (as MetaCRS) have the opportunity to assist in bringing a better format
into popular use.

Best regards,
-- 
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I set the clouds in motion - turn up   | Frank Warmerdam, warmerdam at pobox.com
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and watch the world go round - Rush    | Geospatial Programmer for Rent