1. Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
2. Key Laboratory of Regional Sustainable Development Modeling, Chinese Academy of Sciences, Beijing 100101, China
3. College of Resource and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
4. Faculty of Geographical Science, Beijing Normal University, Beijing 100875, China
5. School of Computer Science, Wuhan University, Wuhan 430072, China