This picture shows some selected flight tracks for 10 September 2001. The data are from a flight segment (.seg) file. A higher resolution picture is here. The airport locations and the coastal and political boundaries are not part of the database.
This picture shows cumulative flight lengths for 1 degree regions over different altitude ranges for the entire day of 10 September 2001. The data are from a cell statistics (.cel) file. A higher resolution picture is here. The coastal and political boundaries are not part of the database.
This picture shows cumulative flight lengths for 1 degree regions over all altitudes for each hour of 10 September 2001. The data are from a cell statistics (.cel) file. A higher resolution picture is here along with an animation. The coastal and political boundaries are not part of the database.