Andrew Johnston

Image of Geographer Andrew Johnston

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.

  • Credit: Image by Ted Maxwell, National Air and Space Museum, Smithsonian Institution
  • For print or commercial use please see our permissions page.
  • Large JPEG (1423 x 959 pixels)
  • Catalog Number: WEB12953-2013