[PROJ] request for integration of optimized transformatiegrid BD72 to ETRS89

[Praet Karin]

Thanks for the info. I'll contact the owner of the grid and ask that they make these changes.

Regards

Karin

-----Oorspronkelijk bericht-----
Van: PROJ [mailto:proj-bounces at lists.osgeo.org] Namens Bas Couwenberg
Verzonden: donderdag 14 februari 2019 16:07
Aan: proj at lists.osgeo.org
Onderwerp: Re: [PROJ] request for integration of optimized transformatiegrid BD72 to ETRS89

On 2019-02-14 15:53, Praet Karin wrote:
> The Belgian National Institute of Geography (NGI) has published a more 
> accurate transformationgrid to convert between Belgian Datum 1972 tot 
> ETRS 89.
> As Belgian Lambert 1972 (EPSG:31370), based on BD72,  is widely used 
> in Belgium - is it possible to integrate this transformationgrid as 
> the default transformation for this datum?

If the license for the grid is compatible with the Open Source Definition, the grid can be included in the proj-datumgrid project:

  https://github.com/OSGeo/proj-datumgrid

The license documented in the readme_nl.pdf file contained in the NTv2.zip says that it's CC-BY, but doesn't specify a version.

CC-BY v3.0 & v4.0 are DFSG compatible, so I recommend that you specify one of those versions.

Adding documentation in English is also a good idea, because the proj-datumgrid package has a global scope.

Kind Regards,

Bas
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