Geocode

Geocode

A Geocode (Geospatial Entity Object Code) is representation format of a geospatial coordinate measurement used to provide a standard representation of an exact geospatial point location at, below, above the surface of the earth at a specified moment of time.

A Geocode representation format is a combination of some or all of the following geospatial attributes:
*Geocode Format Registry Number,
*Latitude
*Longitude
*Altitude
*Date
*Local time
*Global time in Coordinated Universal Time (UTC) format
*Coordinate Reference System - (Coordinate Reference System Type Registry Number - IS0 19115,
*Geodetic Reference Ellipsoid, Registry Number, Geodetic Reference Datum Registry Number, Coordinate Format Registration Number - ISO 19145)
*Coordinate Sensor Accuracy for Latitude, Longitude and/or Altitude
*Internet Protocol version 4 (IPv4) address or Internet Protocol, version 6 (IPv6) address in Compressed, Uncompressed or Fully Uncompressed decimal format
*Other geospatial attributes

Mandatory attributes included in the Geocode representation format are Geocode Format Registry, Latitude, and Longitude. All other attributes are voluntary.

A Geocode is an all-natural number representation format specification.

Geocode is a patented geospatial representation format under US Patents 6,681,231 approved July 26, 2003 and 7,107,286, approved May 4, 2006.

Geocode is a registered US Federal trademark, US Registration Number 3182988, approved December 12, 2006.

Geocode is a federally registered copyrighted computer software program, US Registration Number TX-6-603-127, dated July 26, 1999.

List of some code systems

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

*ISO 6709 Standard Representation for Geographic Point Location by Coordinates
*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
*Geohash, compact string encoding of a geographic coordinate with arbitrary precision, in public domain
*Georef, a military / air naviation coordinate 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 [http://www.mapdot.info/] , 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 [http://www3.who.int/whosis/gis/salb/salb_home.htm]
*SGC codes, Canada only, statistical
*UN/LOCODE, area, administrative, cities
*UTM
*WMO squares

ee 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


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