A Track Density Plot graphically depicts the frequency of aircraft movements over a defined area during a specified time period.  It is an effective tool to illustrate arrival and departure corridors, or changes in flight procedures.  A grid map is defined for the region and each grid is color-coded based on the number of times (frequency) an aircraft passed through the grid.


Track Density Grid Colors are based on Aircraft Frequency Count:


IAD Dulles International - Quarterly Track Density Plots:




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