The image above from the European Space Agency’s Mars Express is a “broom calibration” image, acquired as the spacecraft’s camera pans over the surface from about 9,900 kilometres above the planet.
Colour-coded topography map of the region imaged by ESA’s Mars Express. The elevation is indicated in the scale, with whites to reds the highest terrains, and blues to purples the deepest. The image spans from the south pole to about 10ºN, and includes a portion of the vast Hellas Basin.