Don Davis produced this oil-painted globe of Mars in 1971 based upon Mariner 4, 5, and 6 data. The Southern polar cap is at top with its partial closeup photo coverage. Another strip of photos at right gave the first glimpse of the mountains at the rim of the giant Hellas impact basin. At far left is Gale crater's distinctive dark crescent-filled interior and the lengthy dark streak connecting it with the dark southern regions, an excellent-resolution target for Earth based telescopic images. At the bottom is the dark wedge of Syrtis Major, the most prominent dark area on the planet.