1. University of Wisconsin Sea Grant Institute, Madison, Wisconsin, USA
2. Aquatic Sciences Center, University of Wisconsin-Madison, Madison, Wisconsin, USA
3. Department of Geography, The Pennsylvania State University, State College, Pennsylvania, USA
4. GeoGraphics Lab, The Pennsylvania State University, State College, Pennsylvania, USA
5. Cartography Laboratory, University of Wisconsin, Madison, Wisconsin, USA
6. Department of Geography, University of Wisconsin–Madison, Madison, Wisconsin, USA