(W 91⁰15ʹ00ʺ--W 90⁰45ʹ00ʺ/N 31⁰45ʹ00ʺ--N 31⁰15ʹ00ʺ).
Relief shown by contours and spot heights.
"Modification to USGS base map by the Geometronics Service Center from 1982 aerial photography and 1986 correction guides furnished by the Southern Region."