1. Wuhan University, State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Luoyu Road 129, Wuhan 430079, ChinabWuhan University, Collaborative Innovation Center of Geospatial Technology, Luoyu Road 129, Wuhan 430079, China
2. Wuhan University, State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Luoyu Road 129, Wuhan 430079, China