1. State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing 100875, China
2. Faculty of Geo-Information Science and Earth Observation (ITC), University of Twente, 7514 AE Enschede, The Netherlands
3. School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
4. Department of Scientific Research & Discipline Development, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou 510080, China
5. School of Geography and Planning, Sun Yat-Sen University, Guangzhou 510006, China
6. National Tibetan Plateau Data Center, Beijing 100101, China