1. Key Laboratory of Virtual Geographic Environment, Nanjing Normal University, Ministry of Education, Nanjing, China
2. State Key Laboratory Cultivation Base of Geographical Environment Evolution, Nanjing Normal University, Ministry of Education, Nanjing, China
3. Hunan Engineering Research Center of Geographic Information Security and Application, Changsha, China
4. School of Geoscience and Technology, Zhengzhou University, Zhengzhou, China