I'm working in an area in Baden-Württemberg, Germany. I loaded some OSM data in QGIS but the map display is distorted.
I tried ftools define projection with many different projections but nothing changed.
I tried: - WGS 84/ World Mercator - DHDN / Gauss-Kruger zone 2 - Google mercator - ETRS89 / UTM zone 32N - DHDN / Gauss-Krugerzone 3 - DHDN / Soldner Berlin
and many others...but nothing worked. There was no difference visible.