1. College of Earth Science, Chengdu University of Technology, Chengdu 610059, China
2. School of Surveying and Geo-Informatics, Sichuan Water Conservancy Vocational College, Chengdu 611200, China
3. Sichuan Water Conservancy Innovation and Development Research Institute, Chengdu 611200, China
4. School of Physics, University of Science Malaysia, Penang 11800, Malaysia
5. China Building Materials Southwest Survey and Design Co., Ltd., Chengdu 610052, China