As to the topography, All of mars has been topographically mapped by
Global Surveyor at a resolution up to 230m. Vertical acuracy is about
1m. I don't know exactly how much has been mapped at the highest
resolution, but the data is freely available at
http://ltpwww.gsfc.nasa.gov/tharsis/data.
I believe we (JSBSim team) will soon have a rudimentary model of the
Martian environment integrated within JSBSim. This leads me to a
question about FlightGear/SimGear: What is the potential for modeling
a planetary body that is different from earth in the following ways:
1) Different radius
