1. School of Geographic and Biologic Information, Nanjing University of Posts and Telecommunications, Nanjing, China
2. Smart Health Big Data Analysis and Location Services Engineering Lab of Jiangsu Province, Nanjing University of Posts and Telecommunications, Nanjing, China
3. School of Resource and Environmental Science, Wuhan University, Wuhan, China
4. Key Laboratory of GIS, Ministry of Education, Wuhan University, Wuhan, China
5. Key Laboratory of Digital Mapping and Land Information Application Engineering, National Administration of Surveying, Mapping and Geoinformation, Wuhan University, Wuhan, China
6. Collaborative Innovation Center Of Geospatial Technology, Wuhan University, Wuhan, China