1. Research Center for Digital Mountain and Remote Sensing Application, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, People’s Republic of China
2. Wanglang Mountain Remote Sensing Observation and Research Station of Sichuan Province, Mianyang, People’s Republic of China
3. Department of Geodesy, Faculty of Geodesy and Geomatics Engineering, K. N.Toosi University of Technology, Tehran, Iran
4. College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, People’s Republic of China