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Oblique View of Layers in Crater at 8N 7W
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Oblique View of Layers in Crater at 8°N, 7°W

October 21, 2009
The continuity of flat, layered rock in a crater at 8°N, 7°W, in western Arabia Terra offers an unusual opportunity to create a detailed topographic map of the layers seen in Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image M18-01349. Each layer was traced while maintaining its proper stratigraphic location. The resulting contour map was then registered to MGS laser altimeter data to constrain the range of elevations, and interpolated. It was then possible to create the perspective view seen here (above left) by combining the resulting digital terrain model with the original picture. The oblique view shows what it might be like to fly over these layered outcrops in a helicopter. The image used to generate the oblique view (above right) was acquired by MOC in August 2000; it covers an area 2.8 by 1.7 km (1.7 by 1.0 mi) at a resolution of 1.8 meters (6 ft) per pixel. Dark material in the low areas between buttes and mesas of layered rock is windblown sand.


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