1. Key Laboratory of Virtual Geographic Environment (Nanjing Normal University), Ministry of Education, 210023, China
2. School of Geographic and Biologic Information, Nanjing University of Posts and Telecommunications, 210023, China
3. Smart Health Big Data Analysis and Location Services Engineering Lab of Jiangsu Province, Nanjing University of Posts and Telecommunications, 210023, China
4. Zhejiang Wenling High School, 317515, China
5. Jiangsu Province Surveying & Mapping Engineering Institute, China
6. Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing Normal University, 210023, China