[GRASS-user] Planet coordinate systems?

[Adam Dershowitz, Ph.D., P.E.]

I am interested if anyone has used GRASS with data from Mars, or any other non-earth based system?  I don't see any epsg codes that would apply.  
So, I am looking for some general ideas and guidance to get going.  
If anyone has used GRASS this way, please let me know about your experience, useful links, or other things that might be helpful to deal with some of the existing planetary data, and how to use it.

Thanks,


--Adam