[Proj] Dutch correction grid

Jan Hartmann j.l.h.hartmann at uva.nl
Fri Apr 8 10:28:18 EST 2011

I don't quite understand, Frank. I have a spreadsheet with four columns: 
x, y, correction for x and correction for y. What kind of raster file do 
I need to create with these data?


On 8-4-2011 17:19, Frank Warmerdam wrote:
> On 11-04-07 04:14 AM, Jan Hartmann wrote:
>> If someone could give me some pointers to the grid shift format and the
>> way it is used in PROJ, I will have a go at producing a grid shift file
>> from this spreadsheet. Where did you get it from, Bart?
> Jan,
> I will note that the NTv2 file format used for grid shifts in PROJ.4 is now
> supported as a raster format by GDAL. So if you can get your grid shift
> information into a suitable form, you can translate it to NTv2 with GDAL.
> Hmm, I really need to provide more information on this.
> You can also use GDAL based applications to examine NTv2 files.
> Best regards,

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