National Geographic : 1969 Jan
Earth Parts of three states bare their features to an infrared camera, carried 40 miles high by the National Aeronautics and Space Administra tion-U. S. Air Force X-15 aircraft. Las Vegas lawns glow red in the Nevada desert, foreground. The Colorado River, backed up by Hoover Dam to form Lake Mead, flows southward between Ari zona, left, and California into Mexico on the hori zon. Infrared has knifed through ground haze to 52 reveal earth's every wrin- kle to map makers and geologists. Mountains leap from flat paper (right) under a stereoscope used by Paul Ulmer, noted Swiss car tographer. The instru ment optically combines the images of two photo graphs taken at slightly different angles and gives a three-dimensional view of terrain. Reading the photographs, Mr. Ulmer charts glaciers and rock outcrops for a National Geographic Society map of the Mount Kennedy area of Canada.