Prepared under the direction of the Chief of Engineers, U.S. Army, 1942. Compiled by 29th Engineers, U.S. Army, from maps of Metropolitan Water District, scale 1:120,000, and U.S. Geological Survey "Salton Sink" scale 1:500,000, "Moon Mtn.", "Linskey", "Dome Rock Mtns.", and "Trigo Peaks", scale 1:62,500. Road data, cultural and drainage revised from Tandem T-3A(5-lens) aerial photographs, road maps of Riverside and Imperial Counties, and route maps of the Bureau of Public Roads. Photography by Flight "F" 1st Photographic Squadron, U.S. Army, 1940. Polyconic Projection, North American 1927 Datum.
Type
image
Format
Scale: 1:250,000. Map type: TF. Unknown projection Horizontal datum: unknown Grid note: none Vertical datum: mean sea level Contour interval on land and off shore 500 feet. image/tiff topographic maps maps contour maps relief maps quadrangle maps
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