This is the first time that OS has produced a map of territory from another planet.
BBC: “It was a little hard at first to actually understand the data itself in terms of things like the elevation and the scale and so on,” said the OS cartographer behind the map, Chris Wesson. “But actually the physical process was almost identical to what was used to make an Earth map, or any OS map.”
The map itself covers roughly 10 million sq km (3.8 million sq miles) – or about 7% of the total Martian surface.
See also: Other posts on this blog tagged ‘maps’