1. Key Laboratory of Land Surface Pattern and Simulation; Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences; Beijing 100101 PR China
2. University of Chinese Academy of Sciences; Beijing 100049 PR China
3. Guangdong Open Laboratory of Geospatial Information Technology and Application; Guangzhou Institute of Geography; Guangzhou 510070 PR China
4. International Institute of Applied System Analysis; Laxenburg A-2361 Austria