1 Institute of Remote Sensing Applications, Chinese Academy of Sciences

2 The Research Center for Remote Sensing and GIS,Dept.Geography,Beijing Normal University,Beijing Key Laboratory for Remote Sensing of Environment and Digital Cities

3 Department of Geography and Center for Remote Sensing,Boston University,Boston MA02215,USA, 4 Chinese Center of Disease Control and Prevention

1 Institute of Remote Sensing Applications, Chinese Academy of Sciences

2 The Research Center for Remote Sensing and GIS,Dept.Geography,Beijing Normal University,Beijing Key Laboratory for Remote Sensing of Environment and Digital Cities

3 Department of Geography and Center for Remote Sensing,Boston University,Boston MA02215,USA, 4 Chinese Center of Disease Control and Prevention

1 Institute of Remote Sensing Applications, Chinese Academy of Sciences

2 The Research Center for Remote Sensing and GIS,Dept.Geography,Beijing Normal University,Beijing Key Laboratory for Remote Sensing of Environment and Digital Cities

3 Department of Geography and Center for Remote Sensing,Boston University,Boston MA02215,USA, 4 Chinese Center of Disease Control and Prevention

1 Institute of Remote Sensing Applications, Chinese Academy of Sciences

2 The Research Center for Remote Sensing and GIS,Dept.Geography,Beijing Normal University,Beijing Key Laboratory for Remote Sensing of Environment and Digital Cities

3 Department of Geography and Center for Remote Sensing,Boston University,Boston MA02215,USA, 4 Chinese Center of Disease Control and Prevention