1. 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
2. Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing, People’s Republic of China
3. Department of Geography, University of Wisconsin–Madison, Madison, WI, USA
4. College of Resource and Environment, University of Chinese Academy of Sciences, Beijing, People’s Republic of China
5. School of Computer, Global Land Cover Facility, Department of Geography, University of Maryland, College Park, MD, USA
6. South China Normal University, Guangzhou, People’s Republic of China