1. School of Civil Engineering, Hefei University of Technology, Hefei, China
2. Department of Geography and Program in Planning, University of Toronto, Toronto, Canada
3. School of Resources and Environment, Anhui Agricultural University, Hefei, China
4. Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu, China
5. Research Center of Digital Mountain and Remote Sensing Application, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, China
6. Centre d'Etudes Spatiales de la Biosphere, University of Toulouse, Toulouse, France