1. Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu, China
2. Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, China
3. Faculty of Geographical Science, Beijing Normal University, Beijing, China
4. Faculty of Architecture, the University of Hong Kong, Hong Kong, China
5. Pacific Northwest National Laboratory, Richland, WA, USA
6. Department of Remote Sensing and Geospatial Information Engineering, Southwest Jiaotong University, Chengdu, China