(W 86°37ʹ30ʺ--W 86°30ʹ00ʺ/N 46°07ʹ30ʺ--N 46°00ʹ00ʺ).
Relief shown by contours and spot heights.
"Topography by photogrammetric methods from aerial photographs taken 1978. Field checked 1982. Map edited 1985."
"The Geometronics Service Center has regenerated all map information, with the exception of contours, utilizing digital procedures. Modifications to USGS map base made using 1988 aerial photography and 1992 correction guides furnished by the Eastern Region."