2023 Map of Rockwood OE E

About this map

Lake Erie defines the southern extent of this coastal survey, where the Michigan shoreline meets the northern waters of the Great Lakes. The map documents a landscape heavily influenced by its proximity to the international border, tracing the waters of International Lake at the northwestern edge of the sheet. Inland, the hydrology is shaped by the winding path of Big Creek, which drains through a complex network of wetlands and channels before reaching the coast. This contemporary study by the U.S. Geological Survey preserves the modern arrangement of boundaries and water features, including the precise line between the USA and Canada that runs through the open waters and marshes of the Detroit River's mouth.