1. School of Civil Engineering and Geomatics, Shandong University of Technology, Zibo 255049, China
2. Key Laboratory of Urban Land Resources Monitoring and Simulation, Ministry of Natural Resources, Shenzhen 518040, China
3. School of Space Science and Physics, Shandong University, Weihai 264209, China
4. State Key Laboratory of Resource and Environmental Information System, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
5. College of Earth Science, Chengdu University of Technology, Chengdu 610059, China