Geocode
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A geocode is a geographical code to identify a point or area at the surface of the earth.
The code systems can be described by:
- how the area is coded (number, letter, mixture of both, other)
- which part of the earth is covered (whole earth, land, water, a continent, a country)
- what kind of area or location is coded (country, county, airport, railstation, city, ...)
- whether an area or a point is coded
- time for which the code is valid
List of some code systems
Some of these code systems are free for use, others have different licences.
- Car License plates
- FIPS country codes (FIPS 10-4), area code, administrative, free
- FIPS place codes (FIPS 55) US only, free
- FIPS county codes (FIPS 6-4) US only, free
- FIPS state codes (FIPS 5-2) US only, free
- Geographic coordinate system with longitude / latitude, point system, with span it is an area system, free
- IATA airport codes, area /point codes, airports
- ICAO airport codes, area /point codes, airports
- IANA country codes similar to ISO 3166-1 alpha-2
- IOC country codes, area, worldwide
- ISO country codes area code, administrative ISO 3166-1 alpha-2 free
- ISO 3166-2 area code, administrative, subcountry
- ITU-R country codes
- ITU-T country calling codes
- ITU-T mobile calling codes
- MARC country codes
- NAC, area codes (area can be indefinitely small)
- NUTS area code, partially administrative, worldwide: countries, europe : country to community
- ONS code, UK only, administrative
- Postal codes, area, worldwide, country-codes by UPU, free
- UN code: http://unstats.un.org/unsd/methods/m49/m49regin.htm, area code, continents, countries (like ISO 3166-1 numeric)
- SALB (Second Administrative Level Boundaries), by UN [1] (http://www3.who.int/whosis/gis/salb/salb_home.htm)
- UN/LOCODE, area, administrative, cities
- UTM
- WMO