Editing Geocode (section)

== Cataloged examples ==
{{more references|section|date=May 2024}}
=== In use, general scope ===
Geocodes in use and with general scope:

{|class="wikitable"|
!Geocode !!Inception!!Coverage!!Formation!!Ownership!!Rep. entity!!Context and description
|-
|ISO 3166 ([[ISO 3166-1 alpha-2|alpha-2]] and  [[ISO 3166-1 alpha-3|alpha-3]])  || 1974 || globe/only nations || Name abbreviation || free ||  polygon
| Administrative divisions. Country codes and codes of their subdivisions. Two letters (alpha-2) or three letters (alpha-3).
|-
|[[ISO 3166-1 numeric]]  || 1970 || globe/only nations || Serial number || free ||  polygon
| Administrative divisions. Country codes expressed by serial numbers.

|-
|[[UN M.49]] || ~1970 || globe/only nations || Serial number || free ||  polygon
| Administrative divisions. region codes, area code, continents, countries (re-using ISO 3166-1 numeric codes).

|-
| [[Geohash]]  || 2008 || globe || encode(latLon,precision) || free ||  grid cell
| [[hash function|Hash]] notation for locations. See also  [[Geohash]] and its variants, like [[OpenStreetMap]]'s ''short-link''<ref name="osm_short_link">
The [[OpenStreetMap]]'s ''short link'', [https://wiki.openstreetmap.org/wiki/Shortlink documented in wiki.openstreetmap.org], was released   [https://github.com/openstreetmap/openstreetmap-website/blob/1d8e66016c4cdf465d06198cfbbfe76613ed3bfc/lib/short_link.rb in 2009], is near the same source-code  [https://github.com/openstreetmap/openstreetmap-website/blob/master/lib/short_link.rb 10 years after]. It is strongly based on [[Z-order curve|Morton's interlace algorithm]].
</ref>

|-
| [[Open Location Code]] (OLC)|| 2014 || globe || encode(latLon,precision) || free ||  grid cell
| See also [[Open Location Code|PlusCodes]].<ref>{{cite web |url=https://plus.codes/ |title=Home |website=plus.codes}}</ref>

|-
| [[What3words]]|| 2013 || globe || encode(latLon) || '''patented''' ||  grid cell
| patent-restrictions system, converts 3x3 meter squares into 3 words.<ref>{{cite web|title=What3words: Find and share very precise locations via Google Maps with just 3 words|date=2 July 2013|url=https://thenextweb.com/apps/2013/07/02/what3words-a-new-way-to-search-for-and-share-locations-via-google-maps-with-just-3-words-universal-address-system/|access-date=8 July 2014}}</ref> It is in use at [[Mongol Post]].<ref>{{Cite web|url=http://geospatial-solutions.com/mongolia-adopts-what3words-as-national-addressing-system/|title = Mongolia adopts what3words as national addressing system – Geospatial Solutions : Geospatial Solutions| date=June 2016 }}</ref>

|-
| [[Mapcode]] || 2001 || globe || encode(latLon) || '''patented''' ||  point
| A mapcode is a code consisting of two groups of letters and digits, separated by a dot.

|-
| Geopeg || 2020 || globe/only nations || encode(latLon) || '''open standard''' ||  grid cell
| Geopeg is word-based GPS address, using simple words like London.RedFish. It is a combination of a city and two simple words. It is an open standard geocoding of Earth, currently in development. [https://geopeg.com/demo Geopeg]
|
|}

=== In use, alternative address ===
Geocodes can be used in place of official [[street or road name|street names]] and/or [[house numbering|house numbers]], particularly when a given location has not been assigned an address by authorities. They can also be used as an "alternative address" if it can be converted to a [[Geo URI scheme|Geo URI]]. Even if the geocode is not the official designation for a location, it can be used as a "local standard" to allow homes to receive deliveries, access emergency services, register to vote, etc.

{|class="wikitable"|
!Geocode !!Inception!!Coverage!!Formation!!Ownership!!Rep. entity!!Context and description
|-
|[[Open Location Code|Local OLC]] (Cape Verde)|| 2016 || globe || encode(latLon,precision) || free || grid cell
| OLC is used to provide postal services.<ref>(2016-09-08) "Correios de Cabo Verde testam novo sistema de endereçamento da Google", https://web.archive.org/web/20170209155133/http://aicep.pt/?%2Fnoticias%2F1%2F2534</ref>
|-
|[[Postal addresses in the Republic of Ireland#Eircode|Eircode]] (Ireland)|| 2014<ref>{{cite news|author=Dept of Communications |url=http://www.dcenr.gov.ie/news-and-media/en-ie/Pages/PressRelease/Minister-Rabbitte-launches-Eircode-the-new-location-codes-for-Irish-addresses.aspx |title=Minister Rabbitte launches Eircode the new location codes for Irish addresses |publisher=[[DCENR]] |date=28 April 2014 |access-date=2015-07-15}}</ref> || Ireland || encode(latLon,precision) || copyrighted<ref>{{Cite web|url=https://www.eircode.ie/legal|title = Eircode Terms of Use}}</ref> || grid cell
| It is used officially as ''alternative address'' and as ''postal code''. Limited database and algorithm access. It is a kind of ''fine-grained postal code''.

|}

=== In use, postal codes ===
Geocodes in use, as [[postal codes]]. A geocode recognized by [[Universal Postal Union]] and adopted as "official postal code" by a [[country]], is also a valid postal code. Not all postal codes are geographic, and for some postal code systems, there are codes that are not geocodes (e.g. [[Postcodes in the United Kingdom#Non-geographic codes|in UK system]]). Samples, not a complete list:

{|class="wikitable"|
!Geocode !!Inception!!Coverage!!Formation!!Ownership!!Rep. entity!!Context and description
|-
|[[Código de Endereçamento Postal|CEP]] (Brazil) || 1970? || cities or streets || Hierarchical serial number || proprietary || (variable)
| ... The CEP5 is geographic and CEP8 can be a city (polygon), a street (also street side or a fragment of street side) or a point (specific address).

|-
|[[Postal Index Number]] (India) || ? || postal regions || Hierarchical serial number? || proprietary? ||  (undefined?)
| ...

|-
|[[ZIP Code]] (United States)|| ? || postal regions || Hierarchical serial number? || proprietary? ||  (undefined?)
| ...

|}

=== In use, telephony and radio ===
Geocodes in use for telephony or radio broadcasting scope:
* [[ITU letter codes|ITU-R country codes]]
* [[ITU-T country calling code]]s
* [[ITU-T mobile calling code]]s
* [[Maidenhead Locator System]] (used by amateur radio operators)
* [[Marsden Square]]s

=== In use, others ===
Geocodes in use and with specific scope:

{|class="wikitable"|
!Geocode!!Inception!!Scope!!Coverage!!Formation!!Ownership!!Rep. entity!!Context and description

|-
|[[ONS coding system|ONS]] code  || 2001|| [[United Kingdom|UK]] only || UK/themes || Serial number || free ||  polygon
|Administrative divisions. Geographical areas of the UK, for use in tabulating census.

|-
|[[Nomenclature of Territorial Units for Statistics|NUTS]] area code  || 2003|| [[European Union|EU]] only || Europe || Hierarchical || free ||  polygon
|Administrative divisions. Partially administrative, worldwide (countries) and Europe (country to community)

|-
|[[MARC country code]]s ||1971|| USA only? || globe/only nations || Name abbreviation || free ||  polygon
| Administrative divisions. Country codes.

|-
|[[Standard Geographical Classification code (Canada)|SGC codes]] ||?|| [[Canada]] only || ? || Serial number || free ||  polygon
| Administrative divisions, numeric codes. ... Statistical, like ONS.

|-
|[[UN/LOCODE]]  ||?|| trade and transport || globe || Serial number || free ||  polygon
|  Administrative divisions. [[United Nations|UN]] codes for trade and transport locations.

|-
| [[IATA airport code]]s  || 1930s|| airport || globe || ? || free ||  polygon
|  Administrative divisions. area /point codes, airports and 3-letter city codes
|-
| [[ICAO airport code]]s  ||1950s|| airport || globe || ? || free ||  polygon
|  Administrative divisions.area /point codes, airports

|-
| [[IANA country code]]s  || 1994|| Internet || globe || ? || free ||  polygon
|  Administrative divisions. Similar to [[ISO 3166-1 alpha-2]], see [[Country code top-level domain]], [[List of Internet top-level domains|List]] and [[Internationalized country code top-level domain|Internationalized country codes]].

|-
| [[IOC country code]]s  ||~1960|| Sport || globe || abbreviation || free ||  polygon
|  Administrative divisions. Codes of [[International Olympic Committee|IOC]] members; uses three-letter abbreviation country codes, like ISO 3166-1 alpha-3.
|-
| [[Longhurst code]]  ||?|| Environment || globe || ? || free ||  polygon
| Administrative divisions. A set of four-letter codes used in ecological/geographic regions in oceanography.

|-
| [[List of FIFA country codes|FIFA country code]] || ?|| sport/football || global || ? || free ||  polygon
|  Administrative divisions.

|-
| [[FIPS country code]]s ||1994?|| scope || [[United States|U.S.]]  || ? || free ||  polygon
|  Administrative divisions. (FIPS 10-4) area code.

|-
| [[FIPS place code]]s  ||?|| [[United States|U.S.]] || place  || ? || free ||  polygon
| (FIPS 55). Administrative divisions.

|-
| [[FIPS country code]]s  ||?|| [[United States|U.S.]] || globe/nations || ? || free ||  polygon
| (FIPS 6-4). Administrative divisions

|-
| [[FIPS state code]]s  ||?|| [[United States|U.S.]] || ? || ? || free ||  polygon
| (FIPS 5-2). Administrative divisions
|}

=== Historical or less widely used ===

{|class="wikitable"|
!Geocode!!Inception!!Scope!!Coverage!!Formation!!Ownership!!Rep. entity!!Context and description
|-
|[[Hierarchical administrative subdivision codes|HASC]] || ? || general || nations and subdivs. || Name abbreviation || free || polygon
|Administrative divisions. HASC stands "Hierarchical Administrative Subdivision Codes".

|-
|[[Universal Transverse Mercator coordinate system#UTM zone|UTM Zone]] || ? || general || ? || ? || free || grid cell
| ?

|-
|[[Universal Transverse Mercator coordinate system#Notation|UTM Grid Zones]] || ? || general || ? || ? || free || grid cell
| based on UTM Zones, and Latitude bands of [[Military Grid Reference System|MGRS]]..

|-
|[[World Meteorological Organization squares|WMO squares]] || ~2005? || Meteorology || globe || grid || free || grid cell
| ... replaced by modern DGGS's ...

|-
|[[C-squares]] || 2002 || general || globe || ? || free || grid cell
| compact encoding of geographic coordinate bounds (latitude-longitude). Uses ''WMO squares'' as starting point for hierarchical subdivision.

|-
|[[World Geographic Reference System|GEOREF]]  || ? || general || ? || ? || free || polygon
| World Geographic Reference System, a military / air navigation coordinate system for point and area identification
|-
|[[Global Area Reference System|GARS]] || ~2007?  || general || ? || ? || free || polygon
| reference system developed by the National Geospatial-Intelligence Agency (NGA)

|-
|[[Military Grid Reference System|MGRS]] || ~1960s || general || ? || ? || free || grid cell
| Military Grid Reference System. Derived from UTM and UPS grids by NATO with a unique naming convention.

|}