1. a Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences , 100101, Beijing, China
2. b Institute of Policy and Management, Chinese Academy of Sciences , 100190, Beijing, China
3. c Remote Sensing Department , National Disaster Reduction Center of China , Room 1410, Zhong Min Plaza, No.7 Baiguang Road, Xuanwu District, 100053, Beijing, China