The flyby uses 3D data gathered from HiRISE, the 0.5m reflecting telescope on board NASA's Mars Reconnaissance Orbiter. The 3D data set was calculated using HiRISE's ultra-crispy images - it can recognise objects just a metre across - taken from two different points of view. The photos were matched using picture recognition software and converted in a 3D surface map using the position of the orbiter. The result is the most accurate 3D terrain information on the surface of Mars, which is being published by NASA for everyone to use.
Now, could somebody please make a two-hour version on full IMAX with David Bowie's music, please.