Editing Geocode (section)

=== 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]
|
|}