How Airports Serve Maine
Mark Pearson
This map displays the major airports in and around Maine. It shows how the state can divided according to which airport is the closest as the crow flies.
The flags are a sample of 351 census tracts (of 351 tracts total) within the state.
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/

PWM serves 761,907 people in ME
Portland International Jetport

BGR serves 550,760 people in ME
Bangor International Airport

MHT serves 15,694 people in ME
Manchester-Boston Regional Airport

4,350 people
closest airport: PWM

4,340 people
closest airport: BGR

2,393 people
closest airport: BGR

closest airport: PWM

closest airport: BGR

closest airport: MHT

404 people

610 people

892 people