Street course of Hammerwiesen in Regnitzlosau per OpenStreetMap.
Kalkofen				https://www.openstreetmap.org/#map=18/50.31782/12.03292
Hammerwiesen			https://www.openstreetmap.org/#map=18/50.31149/12.10452
Ziegelhaus			https://www.openstreetmap.org/#map=16/50.3127/12.0766
Contributors to OSM