Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Built Environment (hierarchy name)
4. Built Complexes and Districts (hierarchy name)
5. complexes (buildings and sites)
6. [complexes by function]
7. transportation complexes
8. air transportation complexes

Additional parents:

1. top of the aat hierarchies
2. Objects Facet
3. Built Environment
4. Settlements and Landscapes
5. inhabited places
6. settlements by economic base
7. ports

Narrower term/s

• heliports (airports)
• taxiways [NP]
• runways (airport runways) [NP][+]
  • airstrips
• overruns [NP]

Anotations

Scope note:

Typically refers to large tracts of open, level land upon which runways, hangars, terminals, and other buildings have been constructed to allow for the takeoffs, landings, loading and unloading, and maintenance of aircraft. For smaller areas that have a runway but no or few additional facilities, see "airfields."