Some 70 newly scanned sheets of the geological map 1:25 000 were uploaded by Mapster – Old maps of Poland and Central Europe (http://igrek.amzp.pl/), for free download. These cover i.a. the region Osnabrück-Hanover-Magdeburg.
Also, the FID GEO repository, GEO-LEOe-docs, has added 17 scanned geological maps recently.
All of these are accessible from the FID GEO overview map (https://e-docs.geo-leo.de/map), which now includes 1110 map sheets of the geological map 1:25 000 which are available online for free.