Martian cartography by the world's oldest mapping agency

The world's oldest mapping agency Ordnance Survey has mapped Mars, thinking that it could have potential applications for future space missions.
Created using NASA open data, the map covers a 3672km x 2721km chunk of the Red Planet, has been produced to a scale of 1 to 4 million and even features a few of Mars’ scarce landmarks rendered in OS’ familiar style.

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http://factor-tech.com/feature/martian-cartography-how-ordnance-survey-mapped-mars/ (link for map download is below the article)