Octopod, here are two png files, on the CWBP with the current bounds marked, and one realworld imagery with the current bounds marked. Lat and Long as well.
Both are in Platte Caree, referenced to top right -180,90 bottom left 180, -90
Maybe this will help.
Of course real world parallels all depend on axial tilt and so on, I don't know if that was ever delved into, or do we even dare.
SeerBlue