Great Lakes GIS

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The Great Lakes Commission is a leader in mapping and analysis for the Great Lakes and the St. Lawrence River. Our mapping work and Geographic Information System (GIS) files, called map layers, are available for public use. Click on the expandable sections under Map Layers below to find GIS files that you can download and web maps for you to explore.

 

Great Lakes GIS Map Layers

Below is a quick list of the GIS layers available for the Great Lakes Basin.  Please click on a category to expand and view the associated GIS layers. If you would like more, please search our ArcGIS Online resource page linked here.

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