1. College of Geological Engineering and Geomatics, Chang’an University, Xi’an 710054, China
2. State Key Laboratory of Loess, Xi’an 710054, China
3. Big Data Center for Geosciences and Satellites, Chang’an University, Xi’an 710054, China
4. Key Laboratory of Western China’s Mineral Resource and Geological Engineering, Ministry of Education, Xi’an 710054, China
5. Key Laboratory of Ecological Geology and Disaster Prevention, Ministry of Natural Resources, Xi’an 710054, China
6. China Aero Geophysical Survey and Remote Sensing Center for Natural Resources, Beijing 100083, China