1938 GS-D
The 1938 GS-D (Capitol Reef National Park and Lake Powell from Bull Frog to Hite, Utah) vertical, black and white (panchromatic) aerial project was acquired by the U.S. Geological Survey (USGS) at a scale of 1:31,680 (1 inch equals 2640 feet); 6.5 inch focal length lens; 0-70% sidelap and 60-80% overlap.