1. Department of Geography, Oklahoma State University, Stillwater, OK, USA
2. Center for Geographic Analysis, Harvard University, Cambridge, MA, USA
3. School of Earth and Environmental Sciences, The University of Queensland, St Lucia, Australia
4. Institute for Social Research, University of Michigan, Ann Arbor, MI, USA
5. School of Health, Ball State University, Muncie, IN, USA
6. Department of Geosciences, University of Arkansas, Fayetteville, AR, USA
7. Department of Geography, University of Connecticut, Storrs, CT, USA
8. Lake Erie College of Osteopathic Medicine, Seton Hill University, Greensburg, PA, USA
9. School of Resource and Environmental Sciences, Wuhan University, Wuhan, People’s Republic of China
10. State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan, People’s Republic of China
11. China Data Institute, Ann Arbor, MI, USA
12. Geoinformation and Big Data Research Laboratory, Department of Geography, University of South Carolina, Columbia, SC, USA