Jinzhuang Shi, Hui Li, Key Laboratory of Digital Earth Science, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, China, China; Yuanyuan Lin, School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China, China; Linhai Jing, Key Laboratory of Digital Earth Science, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, China, China; Kongwen Zhang, School of Computing, University of the Fraser Valley, 33844 King Rd, Abbotsford, BC V2S 7M7, Canada, Canada