1. School of Geodesy and Geomatics, Wuhan University, Wuhan, People’s Republic of China
2. School of Geographic Information and Tourism, Chuzhou University, Chuzhou, People’s Republic of China
3. Faculty of Geomatics, East China University of Technology, Nanchang, 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