[gdal-dev] Datum shiftings

[Juan Pedro Pérez Alcántara]

Hi Andre,

thanks so much for the quick answer, this is perfect for scripting.

However, I'm still wondering... is GDAL using the local PROJ4 installation?
Or does datum shiftings by itself? If so, why not to rely on PROJ4?

And using the grid is something we always want to do. Is there any place in
the GDAL config files where we can make the use of the grid permanent for a
datum shift case in particular?

Thanks a lot,


Juan Pedro Pérez Alcántara
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On Fri, May 10, 2013 at 7:32 PM, Andre Joost <andre+joost at nurfuerspam.de>wrote:

> Am 10.05.2013 18:07, schrieb Juan Pedro Pérez Alcántara:
>
>
>> How can I make GDAL to use a NTv2 grid to shift between some datums?
>>
>>
> You have to tell GDAL where to find your shift gridin your file system:
>
> cs2cs +init=epsg:4326 +to +proj=tmerc +lat_0=0 +lon_0=6 +k=1 +x_0=2500000
> +y_0=0 +ellps=bessel +nadgrids=D:\Karten\gdal\**cs2cs\BETA2007.gsb
> +units=m in.txt >>out.txt
>
> HTH,
> Andre Joost
>
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