The Bavarian field maps were produced as lithographs. The printing plates made of Solnhofen limestone were continuously updated until 1960. The city of Munich was surveyed from 1809, charted at a scale of 1:2500 and drawn on stone. The present stone plate NW I.1. displays the north-western part of the historical Munich city centre with the Herzog-Max-Burg, the castle of Duke Maximilian, as well as parts of the Max-Vorstadt (suburb) in the state of 1849. It served for the production of a general map at a scale of 1:5000. For Munich, it was decided in 1876 to continue the cadastral maps at a scale of 1:1000. The stone plate, therefore, was not updated as master copy for printing and thus it still presents itself in the state of the year 1849.