2011 Map of Cat Island

About this map

Lake Superior surrounds a cluster of the Apostle Islands in this 2011 survey, focusing on the isolated landforms of Cat Island and North Twin Island. Located within the waters of Lake Superior, these islands are mapped in high detail, showing the delicate shorelines and internal topography of these northern landmasses. The map also includes the northern tip of Ironwood Island at the bottom edge of the quadrangle. As a modern digital topo, this document reflects the precise surveying of the National Hydrography Dataset and National Elevation Dataset, capturing the exact contours of the islands before changing water levels or natural erosion shifts their boundaries. The absence of roads or structures on these islands highlights their character as protected wilderness and remote maritime landmarks.