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A 'Geocode' ('G'eospatial 'E'ntity 'O'bject 'Code') is code that represents a geospatial coordinate measurement of an exact geographic location and time at, below, or above the surface of the earth.
A Geocode representation is derived from the following geospatial attributes:
1. Latitude
2. Longitude
3. Altitude
4. Date
5. Local Time
6. Global Time
7. Other geospatial attributes such as:

★ 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
A Geocode is an all-natural number representation.

Contents

List of some code systems

See also

External links

List of some code systems

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

★ Car License plates

★ C-squares - compact encoding of geographic coordinate bounds (latitude-longitude)

★ FIPS country codes (FIPS 10-4), area code, administrative, free

★ FIPS place codes (FIPS 55) U.S. only, free

★ FIPS county codes (FIPS 6-4) US only, free

★ FIPS state codes (FIPS 5-2) US only, free

★ Georef, a military / air naviation co-ordinate system for point and area identification

★ 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 3166 country and subdivision codes

★ ITU-R country codes

★ ITU-T country calling codes

★ ITU-T mobile calling codes

★ Maidenhead Locator System

★ MapDot Protocol: world locations coded into a zone sequence[1], free

★ MARC country codes

★ Marsden Squares

★ 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

★ Quarter Degree Grid Cells

★ UN M.49 region codes, area code, continents, countries (like ISO 3166-1 numeric)

★ SALB (Second Administrative Level Boundaries), by UN [2]

★ UN/LOCODE, area, administrative, cities

★ UTM

★ WMO squares

See also

★ Geocoding

★ GIS

★ Geographic coordinate system i.e longitude / latitude, point system

External links

★ http://geonames.usgs.gov/index.html

★ http://www.nima.mil/gns/html/index.html