1. College of Geological Engineering and Geomatics, Chang'an University, Xi'an, China
2. Sichuan Land Consolidation and Rehabilitation, Chengdu, China
3. State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu, China
4. China Geological Survey Chengdu Geological Survey Center, Chengdu, China
5. State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing (LIESMARS), Wuhan University, Wuhan, China