1. State Key Laboratory of Resources and Environmental Information System, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, P.R. China
2. College of Resources and Environment, University of Academy of Sciences, Beijing, P.R. China
3. Department of Geography and Resource Management, The Chinese University of Hong Kong, Hong Kong, P.R. China
4. Institute of Future Cities, The Chinese University of Hong Kong, Hong Kong, P.R. China