[Qgis-user] Can't install / use NTv2 grid file.

[Martin Weis]

Hello,

Am 26.03.2018 um 12:09 schrieb Jürgen E. Fischer:
> On Sat, 24. Mar 2018 at 15:20:01 -0700, tomi_w wrote:
>> (http://geodaten.bayern.de/oadownload/bvv_internet/kanu/BY-KanU_Oberfranken_Testdatei_vorlaeufig.zip),
>> which I have extracted and copied to /usr/share/proj/oberfranken.gsb.
> 
> The GSBs are not automatically picked up.  You'll have to add a row (similar to
> the ones with BETA2007.gsb) to the tbl_datum_transform table in
> resources/srs.db or simply rename your grid to BETA2007.gsb.

Hm, often you need both transformations,  since BETA is for whole
Germany, the others locally (often per federal state).

I checked in visualisations of differences for the new BWTA2017 of
Baden-Württemberg here:
https://github.com/Marwe/bwta2017data

I sent the following accidentially via PM, just some additional pointers

See (in German)
http://www.gkg-kassel.de/pdf/Praezise_Transformation_im_QGIS_mit_Batchmodus.pdf
for details, you need to add it to qgis' sqlite database of
transformations.

More related stuff:
https://gis.stackexchange.com/questions/50365/projecting-shp-from-gk3-to-utm32-with-beta2007#50384
https://issues.qgis.org/issues/11347

Martin