Lake Superior dominates the expanse of this 2019 survey, illustrating the maritime boundary and international frontier between the United States and Canada. This specific coordinate point in the northern waters highlights the transition between Cook County, Minnesota and Keweenaw County, Michigan, where the state line intersects with the international border. The southeastern portion of the map includes the shoreline and interior of Isle Royale National Park, showcasing the northeastern reach of this isolated archipelago. The map's focus is almost entirely aquatic, centered on the Canada-United States border as it cuts across the open water, serving as a critical reference for the administrative and political geography of the upper Great Lakes.
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This is the sole edition of this map. No revisions or reprints were ever made.
1958 · Hancock
USGS Topo · 1:250,000
1959 · Pigeon Point
USGS Topo · 1:24,000
1959 · Fort William
USGS Topo · 1:250,000
1960 · Hancock
USGS Topo · 1:250,000
1961 · Hancock
USGS Topo · 1:250,000
1966 · Hancock
USGS Topo · 1:250,000
1968 · Fort William
USGS Topo · 1:250,000
1985 · Pigeon Point
USGS Topo · 1:100,000
1985 · Grand Portage
USGS Topo · 1:100,000
1999 · Pigeon Point
USGS Topo · 1:24,000