Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Built Environment (hierarchy name)
4. Settlements and Landscapes (hierarchy name)
5. inhabited places
6. [settlements by economic base]

Narrower term/s

• airports [NP][+]
  • heliports (airports)
  • taxiways [NP]
  • runways (airport runways) [NP] [+]
    • airstrips
  • overruns [NP]
• treaty ports
• free ports
• inland ports[+]
  • river ports
• ports of entry
• seaports
• outer ports

Anotations

Scope note:

Settlement areas possessing a harbor and terminal facilities used for loading or unloading, or water transportation. By extension, the term is also applied to such areas facilitating air transportation.