1. State Key Laboratory of Resources and Environmental Information System Institute of Geographic Sciences and Natural Resources Research, CAS Beijing China
2. College of Resources and Environment University of Chinese Academy of Sciences Beijing China
3. Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application Nanjing China
4. Department of Geography University of Wisconsin‐Madison Madison WI USA
5. Key Laboratory of Virtual Geographic Environment (Ministry of Education of PRC) Nanjing Normal University Nanjing China