Mars Express image of a region close to Ma'adim Vallis, one of the largest canyons on Mars. After Valles Marineris, Ma'adim Vallis is one of the largest canyons on Mars. The imaged region lies southeast of Ma'adim Vallis; the pictures are centred at about 29°S and 182°E and have a ground resolution of 15 metres per pixel.
Ma'adim Vallis is located between the volcanic region of Tharsis, which harbours four volcanoes, including the largest volcano in the Solar System, and the Hellas Planitia impact basin, and originates in the southern highlands close to the dichotomy boundary and ends in Gusev crater. The canyon is 20 kilometres wide and 2 kilometres deep.
This ortho-image was rectified using elevation data derived from a high-resolution Digital Terrain Model, or DTM (obtained from HRSC data), such that distortions introduced during imaging are corrected. Such an image can be used to derive maps. Elevation data from the DTM has been colour-coded and overlain on the ortho-image so that elevation data and the image itself are displayed in a single scene.
The scale is in metres.
Credit: ESA/DLR/FU Berlin (G. Neukum).