View a map of Lake Superior, showing bathymetric contour data, by going to the National Oceanic and Atmospheric Administration Great Lakes Environmental Research Laboratory website, clicking on the Data and Products menu, selecting the Bathymetry link under Physical Properties, and then clicking on Superior. Bathymetry is the study of underwater topography along the floor of a body of water. The Lake Superior bathymetric map displays contour data as a color graphic, in depths ranging from 0 to 450 meters.
A bathymetric map displays each range of depths as a different color. The contour lines that separate one color region from another are called depth contours or isobaths.
Hydrography is the name of the science that measures the physical features of a body of water. Hydrography includes bathymetry and also studies the shape and features of the shoreline, aspects of tides, currents and waves, and the physical and chemical makeup of the water.
Lake Superior is the largest Great Lake. The lake is bordered by Minnesota, Wisconsin and Michigan, as well as the province of Ontario. Superior is the world's largest freshwater lake by surface area and the third-largest freshwater lake by volume. The average depth of the lake is 147 meters, with a maximum depth of 406 meters.