List of geocoding systems

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This is a list of geocoding systems, in the sense of schemes that assign systematic labels to geographic entities.

This is not a list of software systems that can perform geocoding in the sense of turning a geographic name into a latitude and longitude.

Some of these code systems are free for use, others have different licences.


Codes with only partial coverture of the globe, mainly for "administrative regions", like countries or biomes.

General use:

Airport codes:

Internet codes: IANA country codes similar to ISO 3166-1 alpha-2

Sport codes: IOC country codes, area, worldwide

Environment codes: Longhurst code, a set of four-letter codes used in ecological geography

National standards[edit]


Summarized from Discrete Global Grid

Popular or in "official use":

Old or "low use":

  • C-squares - compact encoding of geographic coordinate bounds (latitude-longitude)
  • Geotude, converts latitude and longitude to a single string
  • Munich Orientation Convention, converts lat/lon to metrical monopolar codes for targets, crossings, stations, stop points, bridges, tunnels, towns, islands, volcanoes, highway exits etc. [2]

Telephony & radio broadcasting[edit]

Postal address[edit]

Mapping not geodesy[edit]


  1. ^ "What3words: Find and share very precise locations via Google Maps with just 3 words". Retrieved 8 July 2014.
  2. ^ By Step Navigation|Navipedia / ESA[permanent dead link]
  3. ^ "Overview". Retrieved 2018-05-11.
  4. ^ Kreiss, Sven (2016-07-27). "S2 cells and space-filling curves: Keys to building better digital map tools for cities". Medium. Retrieved 2018-05-11.
  5. ^ "Understanding Geographic Identifiers (GEOIDs)". United States Census Bureau. Retrieved March 3, 2016.
  6. ^ "". Retrieved 10 June 2012.