1. School of Geography and Information Engineering, China University of Geosciences, Wuhan, People’s Republic of China
2. Guangxi Zhuang Autonomous Region Institute of Natural Resources Remote Sensing, Nanning, People’s Republic of China
3. School of Computer Science, China University of Geosciences, Wuhan, People’s Republic of China
4. State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan, People’s Republic of China
5. National Engineering Research Center of Geographic Information System, China University of Geosciences, Wuhan, People’s Republic of China