1. Department of Geography and GeoInformation Science, George Mason University, Fairfax, VA, USA
2. Dartmouth College, Hanover, NH, USA
3. Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA
4. Bayer, Washington, DC, USA
5. Northern Virginia Community College, Annandale, VA, USA
6. Indian Institute of Technology, Roorkee, India