Hi, I am struggling in QGIS 2x with datum transformations.
The manual is not explicit how to handle this correctly. Here are the steps I tried: 1. As far as I understand, I have to copy the gsb file to the directory where proj stores the gsb files, in my case "C:\Program Files\OSGeo4W64\share\proj". Alternatively, one could set another folder and adjust the PROJ_LIB env variable accordingly. 2. In "Settings" --> "Options" --> "CRS" I can define default datum transformations. I tried to enter 21781 (Source CRS), 2056 (Destination CRS), +nadgrids=CHENYX06a.gsb (Source datum transfomation). Destionation datum has been left empty. 3. I would expect that whenever this combination 21781 --> 2056 shows up that QGIS would ask me to pick one the defaults specified in 2. The problem is that 2. does not work. When I close the dialogue and reopen it, my modifications are gone ... and I never have the chance to select my datum transformation option. Can you help me what I am doing things wrong? Thank you, Andreas
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