How Airports Serve Nebraska
Mark Pearson
This map displays the major airports in and around Nebraska. It shows how the state can divided according to which airport is the closest as the crow flies.
The flags are a sample of 500 census tracts (of 532 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/

LNK serves 836,030 people in NE
Lincoln Airport (was Lincoln Municipal)

OMA serves 797,771 people in NE
Eppley Airfield

DEN serves 85,702 people in NE
Denver International Airport

FSD serves 61,328 people in NE
Sioux Falls Regional Airport (Joe Foss Field)

RAP serves 39,155 people in NE
Rapid City Regional Airport

MCI serves 6,355 people in NE
Kansas City International Airport

dividing line

2,215 people
closest airport: RAP

3,521 people
closest airport: LNK

1,801 people
closest airport: OMA

closest airport: OMA

closest airport: LNK

closest airport: FSD

closest airport: RAP

539 people
closest airport: RAP

closest airport: DEN

736 people

165 people

closest airport: MCI