(W 89°07ʹ30ʺ--W 89°00ʹ00ʺ/N 46°00ʹ00ʺ--N 45°52ʹ30ʺ).
Relief shown by contours and spot heights.
"Topography by photogrammetric methods from aerial photographs taken 1966. Field checked 1970."
"The Geometronics Service Center has regenerated all map information, with the exception of contours, utilizing digital procedures. Modifications to USGS map base made using 1991 aerial photography and 1991 correction guides furnished by the Eastern Region."