Geographer Andrew Johnston in the Kiseiba Oasis region uses GPS equipment to survey the elevations of sand sheet surfaces, which geologists later tied in to orbital data to interpret the position of ancient lakes and waterways.
Image Number: WEB12953-2013
Credit: Image by Ted Maxwell, National Air and Space Museum, Smithsonian Institution
For print or commercial use, please contact: Smithsonian Institution
Reproductions are not currently available. If you would like to use this image as-is, please submit a permission request.