1. The Academy of Digital China (Fujian), Fuzhou University, Fuzhou, China
2. Key Laboratory of Spatial Data Mining & Information Sharing of Ministry of Education, Fuzhou University, Fuzhou, China
3. School of Economics and Management, Fuzhou University, Fuzhou, China
4. Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China
5. Hunan Cartographic Publishing House, Changsha, China