Scale approximately 1:2,407,680; 1 in. equals approximately 38 miles (W 96°05ʹ00ʺ--W 75°54ʹ00ʺ/N 40°32ʹ00ʺ--N 24°49ʹ00ʺ).
Note
Relief shown by shading. Insets: Caddo and Crosstimbers National Grasslands in Texas -- Puerto Rico and the Virgin Islands of the U.S. Text, color illustrations, and "Relief map of the southern region" on verso.