1963 Map of Cat Island

About this map

Lake Superior surrounds the remote landmasses of La Pointe Twp in this detailed hydrographic and topographic study. The map centers on Cat Island, the most prominent feature of the quadrangle, flanked by the smaller North Twin Island to the north and the eastern edge of Ironwood Island to the southwest. These landforms are part of the larger Apostle Islands chain, shown here during a period of mid-century scientific mapping by the Geological Survey and the Wisconsin Geological and Natural History Survey. The map provides precise depth soundings and interior elevations for these uninhabited islands, capturing the shoreline and terrain as it appeared before many of these areas were incorporated into the national lakeshore system. It serves as a specific record of the island topography and surrounding lake floor depths in the early 1960s.