1. School of Environmental Studies, ChinaUniversity of Geosciences, Wuhan, 430074, China; Department ofEnvironment and Resource Studies, UDS, Wa-Ghana
2. School of InformationEngineering, China University of Geosciences, Wuhan430074, China; National Engineering Research Center of GIS, China University of Geosciences, Wuhan 430074, China
3. School of Environmental Studies, China Universityof Geosciences, Wuhan, 430074, China