Using a planning program, planetary researcher Ernst Hauber defines which images should be acquired using the High Resolution Stereo Camera on Mars Express. It is the aim of the DLR scientists to be the first team to map the entire surface of Mars at high resolution, in colour and in 3D. Although the diameter of Mars is only half that of Earth, the surface area still measures almost 150 million square kilometres, equivalent in size to all the continental landmasses on Earth combined.