Topographic maps. Arizona. Topographic map of Grand Canyon National Park, Ariz, (east half), topography by Francois E. Matthes and Richard T. Evans, surveyed in 1902-23, lat. [35° 57′ 35″-] 36° 25′, long. 111° 45′-112° 15′. Scale 1:48,000, contour interval 50 ft.