2016 Map of Green Island

About this map

Green Island sits as a solitary landmass at the center of this maritime survey, marking the aquatic threshold between Lake Michigan and Green Bay. Located in the waters of Door County, the island is surrounded by the invisible legal boundaries that divide Wisconsin and Michigan. The map highlights the intersection of several county lines, including Menominee, Marinette, and Door counties, which meet in the open water. This 2016 data reflects the contemporary bathymetry and shoreline of this isolated point in the Great Lakes, emphasizing its role as a navigational landmark rather than a site of significant onshore infrastructure. The surrounding expanse of Green Bay and the larger lake dominates the sheet, illustrating the maritime geography that has long defined the transition between the upper and lower peninsulas.