several mapping functions  Simple bitmaps of single parts on PC created (surroundings as spherical panorama, tunnel floor as identic surface, tunnel wall as cylindrical projection). With a selfmade program the single parts were transformated to the several destination projection types
This file was derived from: PeterW zt 2.png:
PeterW_zt_2.png: Damian Yerrick
derivative work: Malyszkz (talk)