How Airports Serve the New York City metro region
Mark Pearson
This map displays the major airports in and around the New York City metro region. It shows how the region can divided according to which airport is the closest as the crow flies.
The flags are a sample of census tracts served by the airports in the region.
Some census tract flags may look like they are colored for one airport's region but are actually in another airport's region. The census tract flags are colored with which airport they are closest to as the crow flies along the surface of the earth (the Haversine distance formula). The region boundaries that are displayed on map were computed assuming assuming the earth is flat. (The lines that divide regions are a Voronoi diagram, and I couldn't find any algorithm that calculate the lines on a sphere such as the earth.) In short, although a few census tracts may look like they're mislabeled near a boundary, it's actually the boundary that is slightly wrong.
For more information, see the full report:
http://www.mark-pearson.com/airport-distances/

LGA
LaGuardia Airport (and Marine Air Terminal)

JFK
John F. Kennedy International Airport

EWR
Newark Liberty International Airport

2,050 people
closest airport: EWR

2,096 people
closest airport: JFK

6,006 people
closest airport: JFK

closest airport: EWR

closest airport: JFK

closest airport: LGA

245 people

4 people

17 people