Thursday, 25 Dec 2014
 
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Topographical map of the Tharsis Tholus volcano complex



Topographical map of the Tharsis Tholus volcano complex
Download this image: Hi-Res TIFF (44.23 MB)
Digital terrain models can be generated using data acquired by several of the nine channels of the High Resolution Stereo Camera (HRSC) on ESA's Mars Express spacecraft, which image the planetary surface from different angles. These allow the landscape profile to be represented pictorially and can be used to create topographic maps. North is to the right in this image. In the absence of ‘sea level’, the height information (see key at the top of the full-size image) is referenced to what is known as an areoid, a modelled equipotential surface on which everything experiences the same gravitational attraction towards the centre of the planet.
Credit: ESA/DLR/FU Berlin (G. Neukum).