1. Key Laboratory of Mountain Hazards and Earth Surface Processes/Institute of Mountain Hazards and EnvironmentCAS Chengdu 610041 China
2. CAS Center for Excellence in Tibetan Plateau Earth Sciences
3. Sichuan Geomatics Center/Sichuan Engineering Research Center for Emergency Mapping & Disaster Reduction Chengdu 610041 China
4. University of Chinese Academy of Sciences Beijing 100049 China