[Proj] Dutch correction grid

Jan Hartmann j.l.h.hartmann at uva.nl
Fri Apr 8 12:26:58 EST 2011

On 8-4-2011 19:09, Frank Warmerdam wrote:
> Jan,
> Ah, I had not paid close enough attention to realize the above.  I think
> it can still work if you convert the shifts into arcseconds.  Note that
> the shifts will be applied in PROJ.4 by converting to lat/long, applying
> the shift, and shifting back.  There may be some subtleties to how you
> setup your coordinate system definitions to trigger proper use of the
> NTv2 file.
This agrees with the previous message by Maxime Sequin. Just to be sure: 
can I use either "@nadgrids=ntv2 binary file" or "@nadgrids=GDAL raster 
file" interchangeably?


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