The Wisconsin Coastal Atlas is a platform that enables people to better understand coastal issues, share coastal data, and inform decision-making about sustainable use of the Great Lakes. It is intended for use by coastal resource managers, planners, researchers, educators, tourists, citizen scientists, and coastal residents. The atlas serves as a gateway to interactive maps and decision support tools relevant to Great Lakes management and provides access to place-based learning resources about coastal issues in Wisconsin. The atlas is built with an open architecture that allows easy addition of new maps, data, tools, and learning resources. Development of the Wisconsin Coastal Atlas began in February 2010 with funding from the University of Wisconsin Sea Grant College Program.