1. School of Geography Science, Nanjing Normal University, Honors College, Nanjing Normal University Nanjing, China
2. School of Geography Science, Nanjing Normal University, Key Laboratory of Virtual Geographic Environment, Ministry of Education, Nanjing Normal University, Jiangsu Center of Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing, China
3. School of Geography Science, Nanjing Normal University, Nanjing, China