2012/2/23 Fabian Lächler <Laechler at eomap.de>: ... > The dxf file doesn´t have any geoinformations and I can´t copy any > geoinformations to it with the "v.proj" function. > Is there a tutorial how to put dxf files into a 3d model? Yes, for a starter, see http://grass.osgeo.org/wiki/Import_DXF Markus