"Contour interval 100 feet." Relief shown by contours and spot heights. "Compiled in 1955 by photogrammetric methods and from USGS and AMS 1:31,680, 1:24,000, 1:25,000, 1:50,000, 1:62,500, 1916-49 quadrangles. Planimetric detail revised by photo-planimetric methods. Horizontal and vertical control by USGS, USC&GS and USCE. Photography field annotated 1955." "100,000-foot grids based on Oklahoma coordinate system, south zone and Texas coordinate system, north central zone. Includes magnetic declination information, sectionalized township diagram, and location and reliability diagrams. "34098-A1-TF-250." Includes Harmon, Greer, Kiowa, Caddo, Grady, Jackson, Tillman, Comanche, Cotton, Stephens, and Jefferson counties, Oklahoma; Hardeman, Willbarger, Wichita, Clay, and Foard counties, Texas.