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Use of standard codes facilitates the interchange of machine-readable data from agency to agency within the federal community and between federal offices and state and local groups. These codes are also used by some companies as a coding standard as well, especially those that must deal with federal, state and local governments for such things ...
Sea Level Datum 1929: OSGB36: Ordnance Survey Great Britain 1936: SK-42: Systema Koordinat 1942 goda: ED50: European Datum 1950: SAD69: South American Datum 1969: GRS 80: Geodetic Reference System 1980: ISO 6709: Geographic point coord. 1983: NAD 83: North American Datum 1983: WGS 84: World Geodetic System 1984: NAVD 88: N. American Vertical ...
It consists of two-letter codes for geographical entities, four-letter codes for subdivisions, and lists the ISO three-letter codes for reference. The digrams match the FIPS 10-4 codes with a few exceptions. The ninth edition's ratification draft was published on 6 July 2005, with a reply deadline of 6 October 2005.
ISO 6709, Standard representation of geographic point location by coordinates, is the international standard for representation of latitude, longitude and altitude for geographic point locations. The first edition ( ISO 6709:1983 ) was developed by ISO/IEC JTC 1 /SC 32.
Eight area codes are used to cover certain geographical areas for regular voice communications: [1] 311 for AFRICOM; 312 for the Continental United States and Puerto Rico; 313 for the Caribbean; 314 for EUCOM; 315 for INDOPACOM; 317 for Alaska; 318 for CENTCOM; 319 for Canada (Canadian Switched Network (CSN))
A geocode is a code that represents a geographic entity (location or object). It is a unique identifier of the entity, to distinguish it from others in a finite set of geographic entities. In general the geocode is a human-readable and short identifier. Typical geocodes and entities represented by it: Country code and subdivision code. Polygon ...
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The shortness is the key differentiating factor between mapcodes and other location references; [1] more densely populated areas are designated with shorter (4 character) codes. The brevity of mapcodes was achieved through a combination of several ideas: Codes need only be accurate enough for human, everyday use.