I am working with an elevation raster from the Federal Agency for Cartography and Geodesy in Germany. Unfortunately, the CRS of the raster is unknown. Now I am trying to identify the correct CRS, so that I can polygonize the raster and merge it with my other shapefiles all of which are referenced in EPSG:31467.
I have tried the following steps for this list of CRS. EPSG:3246, EPSG:31467, EPSG:25832 and ETRS89.
- Inspect the raster --> has unknown CRS
- Polygonize the raster using the
- Assign CRS using the
- Save the resulting shapefile as EPSG:31467 using
Export: Save Features as
- Load the EPSG:31467 shapefile with other shapefiles with the same CRS
I did this for all CRS listed above and in all cases the resulting shapefiles with previously unknown CRS was not located where all the other EPSG:31467 shapefiles were.
I am working with QGIS 3.16.
Solution: The answers below by Babel and Zman3 are both right and the error cannot be reproduced for the raster file under the download link. It turns out that I was working with a previous version of the raster file that I downloaded a few months ago. The old version did not use
EPSG:35832 and so reprojecting as such did not yield the correct placement relative to the basemap.