+proj=hgridshift can also work on NTv2 .gsb files. Cf
https://proj.org/operations/transformations/hgridshift.html#cmdoption-arg-grids
Le 31/08/2022 à 15:41, David Fileccia a écrit :
I need to get the grid shift of the NtV2 files for the Australian
National Grid 1984. I can use the .TIF files in the PROJ data but I
also need to be able to use the original GSB file for customers that
only understand the official government data.
My current setup for the .TIF file is:
conststd::string p="+proj=pipeline"
"+step+proj=unitconvert+xy_in=deg+xy_out=rad"
"+step+proj=hgridshift+grids=<gridpath>.tif+inv"
"+step+proj=unitconvert+xy_in=rad+xy_out=deg";
I tried:
conststd::string p="+proj=pipeline"
"+step+proj=unitconvert+xy_in=deg+xy_out=rad"
"+step+nadgrids=<gridpath>.gsb+inv"
"+step+proj=unitconvert+xy_in=rad+xy_out=deg";
Of course, this failed saying it is an invalid pipeline.
What is the correct pipeline for this procedure?
Best Regards,
*David Fileccia*
*Senior Systems Engineer | HEMISPHERE GNSS*
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