I am looking for a single data source containing the so-called TK25 numbers, aka "Messtischblattnummern" (preferrably quarter-TK25).
I want to intersect the TK25 data with vector data (e.g., a polygon of an area) and subsequently query another data source with the resulting TK25 numbers for their database content.
I assumed a TK25 grid is out there, on an national level, but I could only find published data on state level.
