the stunning mosaic could help scientists better understand how water and lava once flowed across mars .
terrain model shows the impressive height of the meridiani planum region at up to 820ft -lrb- 250 metres -rrb- in red .
colder colours reveal craters , ditches and plains , which are particularly prominent in chryse planitia region .
in three years , the german aerospace center wants to represent the whole of mars as one coherent mosaic .