1. School of Geography and Information Engineering, China University of Geosciences, Wuhan, People’s Republic of China
2. National Engineering Research Center of Geographic Information System, China University of Geosciences, Wuhan, People’s Republic of China
3. School of Geodesy and Geomatics, Wuhan University, Wuhan, People’s Republic of China
4. School of Resources and Environmental Science, Wuhan University, Wuhan, People’s Republic of China