1. School of Internet of Things, Nanjing University of Posts and Telecommunications, Nanjing 210023, China
2. Smart Health Big Data Analysis and Location Services Engineering Laboratory of Jiangsu Province, Nanjing 210023, China
3. State Key Laboratory of Resources and Environmental Information Systems, Institute of Geographic Sciences & Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
4. Key Laboratory of Poyang Lake Wetland and Watershed Research Ministry of Education, Jiangxi Normal University, Nanchang 330022, China
5. School of Geographic Sciences, Nanjing University of Information Science and Technology, Nanjing 210044, China