1. Key Laboratory of Spatial Data Mining & Information Sharing, Ministry of Education, Fuzhou University, Fuzhou, People’s Republic of China
2. The Academy of Digital China (Fujian), Fuzhou University, Fuzhou, People’s Republic of China
3. State Key Laboratory of Resources and Environmental Information System, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, People’s Republic of China
4. University of Chinese Academy of Sciences, Beijing, People’s Republic of China