1. a State Key Laboratory of Remote Sensing Science , Jointly Sponsored by the Institute of Remote Sensing Applications of Chinese Academy of Sciences and Beijing Normal University , Institute of Remote Sensing Applications , Chinese Academy of Sciences , P.O. Box 9718, Beijing 100101, China
2. b School of Geomatics and Urban Information , Beijing Institute of Civil Engineering and Architecture , No. 1 , Zhanlanguan Road, Xicheng District, Beijing 100044, P.R. China
3. c Department of Computing , London Metropolitan University , 166–220 Holloway Road, London N7 8DB, UK
4. d Graduate University , Chinese Academy of Sciences , Beijing 100049, China
5. e Key Laboratory of Poyang Lake Ecological Environment and Resource Development , Jiangxi Normal University , Nanchang, Jiangxi Province, China