[QGIS-Developer] [Qgis-user] (how to) register gsb transformation in proj.db?

[Thomas Schüttenberg]

> Even Rouault <even.rouault at spatialys.com> hat am 05.06.2020 11:53 geschrieben:
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> On vendredi 5 juin 2020 11:13:09 CEST Thomas Schüttenberg wrote:
> I'm not super familiar with the QGIS details about the selection and preference settings of transformations. I now that Nyall made a lot of efforts to make this as smooth as possible (difficult challenge to have user friendliness and accurate behaviour in that field!).

Very true!

> Looking at your record for minden.gsb, it uses a very large area of use. Once integrated into EPSG, it will probably use a much smaller one fitted to the grid extent, and I'm not sure how QGIS will react when zooming out sufficiently so that the grid doesn't cover the displayed extent.
> You could simulate that by creating a new record into the area table which uses the real extent of your grid

Yes, I already thought of that, too. Can the extend be derrived from a gsb-file? Otherwise I have to estimate.