Tong Qiu¹, Conghe Song¹, Bijan Seyednasrollah^2,3 and Nuvan Rathnayaka⁴, (1)University of North Carolina at Chapel Hill, Department of Geography, Chapel Hill, NC, United States, (2)Harvard University, Cambridge, MA, United States, (3)Northern Arizona University, School of Informatics, Computing and Cyber Systems, Flagstaff, AZ, United States, (4)University of North Carolina at Chapel Hill, Biostatistics, Chapel Hill, United States