1. NSF Spatiotemporal Innovation Center and Dept of Geography and GeoInformation Science, George Mason University, Fairfax, VA, USA
2. Future Data Lab, MA, USA
3. NSF Spatiotemporal Innovation Center and Center for Geographic Analyses, Harvard University, Cambridge, MA, USA
4. University of Chicago, Chicago, IL, USA
5. Department of Geography, Oklahoma State University, Stillwater, OK, USA
6. Department of Geography, Frostburg State University, Frostburg, MD, USA
7. Department of Computer Science, Emory University, Atlanta, GA, USA
8. Department of Geography, Dartmouth College, Hanover, NH
9. Department of Electrical Engineering and Computer Sciences, University of California, Berkeley, Berkeley, CA