37.618817 N 122.375427 W 37°37'07.74"N 122°22'31.54"W 37d37'07.74"N 122d22'31.54"W 37d37m07.74sN 122d22m31.54sW 37 37 07.74N 122 22 31.54W 37 37N 122 23W N37 37 W122 23 W122 23 N37 37
IATA codes contain three letters and are assigned by the International Air Transport Association to airports and other transport-related facilities around the world.
FAA codes are assigned by the Federal Aviation Administration to airports within the United States of America, including its possessions and territories. FAA codes for airports with scheduled airline operations consist of three letters. Other FAA airport codes consist of three or four alphanumeric characters.
For US airports which have an IATA code, the IATA code is usually (but not always) the same as the FAA code. However, a US airport which does not have an IATA code may have a three letter FAA code which is the same as the IATA code for a non-US airport. One such airport is CBG. See What happens if the same code appears in several sources? for more information.
The most common choice is the Airport Reference Point (ARP), which is the average of the latitude-longitude of each runway's center. For an airport with one runway, that's the middle of the runway, but with multiple runways it can be in seemingly odd places: for many years the ARP for Chicago's O'Hare (KORD/ORD) was in the parking structure.
Other choices are plausible and not uncommon. Sometimes different sources use different points to define an airport's locations, which leads to ambiguity as to where an airport is actually located. For example, when the Great Circle Mapper switched from using DAFIF data to AIP Algeria for DAOR/CBH the airport "moved" about 1.7 km. DAFIF used the ARP; AIP Algeria uses the apron right in front of the middle of the terminal.
Class Scheduled Large
Class I ok ok ok Class II - ok ok Class III - ok - Class IV - - ok
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Karl L. Swartz.
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