It seems that the solution previously given does not work anymore:

How to use gridfiles (*.gsb) in QGIS

Does someone know how to add new transformations in using gridfiles *.gsb in QGIS 3.10?

  • Maybe this problem is related to that bug github.com/qgis/QGIS/issues/32795 ? Nov 13, 2019 at 10:37
  • After some investigations, it seems that QGIS 3.10.0-2 is only using the transformations saved in "C:\Program Files\QGIS 3.10\share\proj\proj.db" and does not take into account what is in "C:\Program Files\QGIS 3.10\apps\qgis\resources\srs.db" The question is then : how to add a new database or how to modify the one used by default? Nov 13, 2019 at 11:15

1 Answer 1


It seems this bug is fixed with the new version Qgis 3.10.2.

In the CRS menu in the "Default Datum Transformations" I got a suggestion to download the transfornation grid I needed (proj-datumgrid-europe-1.5) here => https://download.osgeo.org/proj/?C=M&O=D

Then I unzipped the file to the right directory (C:\Program Files\QGIS 3.10\share\proj). This directory could be located under C:\OSGeo4W64\share\proj, depending on how you installed Qgis on your PC.

After a restart of Qgis, it worked!

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.