Xiaoyang Zhang, Geographic Information Science Center of Excellence, Brookings, SD, United States, Yongchang Ye, South Dakota State University, Brookings, United States, Weile Wang, CSUMB & NASA/AMES, Seaside, CA, United States, Yujie Wang, NASA Goddard Space Flight Center, Greenbelt, MD, United States and Yongchang Ye; Weile Wang; Yujie Wang