1. Ministry of Education, Key Laboratory of Virtual Geographic Environment, Nanjing Normal University, Nanjing, China
2. Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing, China
3. State Key Laboratory Cultivation Base of Geographical Environment Evolution (Jiangsu Province), Nanjing, China
4. School of Geographical Science, Nantong University, Nantong, China