Color bathymetric map of Lake Erie. http://www.ngdc.noaa.gov/mgg/greatlakes/greatlakes.html

Color bathymetric map of Thunder Bay, Lake Huron. http://www.ngdc.noaa.gov/mgg/greatlakes/greatlakes.html

Color bathymetric map of Lake Ontario. http://www.ngdc.noaa.gov/mgg/greatlakes/greatlakes.html

Color bathymetric map of Lake Michigan. http://www.ngdc.noaa.gov/mgg/greatlakes/greatlakes.html

Great Lakes topographic and bathymetric map. Produced by NOAA NGDC. http://www.ngdc.noaa.gov/mgg/greatlakes/greatlakes.html

Map of the Great Lakes with Lat/Lon and basin outline.

Color bathymetric map of Lake Huron. http://www.ngdc.noaa.gov/mgg/greatlakes/greatlakes.html

A counter-clockwise wind pattern creates this phenomenon. Sediments are transported from the west side of Lake Michigan near Chicago to the east side of the lake. MODIS satellite image, 05/04/05.

NASA MODIS image of Lake Erie, taken October 7, 2007. http://coastwatch.glerl.noaa.gov/modis/modis.html

NASA MODIS image of Lake Erie, taken October 23, 2008. http://coastwatch.glerl.noaa.gov/modis/modis.html

MODIS image of Lake Erie ice cover. February 6, 2009.

MODIS satellite image showing maximum seasonal Great Lakes ice cover. March 4, 2009.