1. Department of Geography, Pennsylvania State University, University Park, PA, USA
2. NASA Goddard Space Flight Center, NASA Goddard Space Flight Center, Greenbelt, MD, USA
3. Department of Geography, University of California- Santa Barbara, Santa Barbara, CA, USA
4. Department of Geography, University of Wisconsin-Madison, Madison, WI, USA
5. Department of Geography and the Environment, University of Denver, Denver, CO, USA
6. School of Geographical Sciences and Urban Planning, Arizona State University, Tempe, AZ, USA
7. Department of Geography, University of South Carolina, Columbia, SC, USA
8. NSF Spatiotemporal Innovation Center & Dept. of Geography and GeoInformation Science, George Mason University, Fairfax, VA, USA
9. Department of Geoinformatics, University of Salzburg, Kapitelgasse, Salzburg, Austria
10. Center for Geographic Analysis, Harvard University, Boston, MA, USA