1. School of Remote Sensing and Information Engineering Wuhan University Wuhan China
2. Department of Epidemiology, Ministry of Education Key Lab of Hazard Assessment and Control in Special Operational Environment, School of Public Health Air Force Medical University Xi'an China
3. School of Resource and Environmental Science Wuhan University Wuhan China
4. Department of Infectious Disease Control and Prevention Xi'an Center for Disease Prevention and Control Xi'an China