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The reference data for the locations (which provides the longitude and latitudes) is taken from the (U.S.) [http://www.nga.mil National Geospatial-Intelligence Agency's] [http://geonames.nga.mil/ggmagaz/geonames4.asp GEOnet Names Server (GNS)] which covers the world excluding the U.S. and Antartica.
==Details of the GEOnet Names Server(GNS)==
*Place names are recorded in [http://earth-info.nga.mil/gns/html/romanization.html Romanized form]
*Country (and province/territory) names, as well as their assigned codes, are recorded using [http://earth-info.nga.mil/gns/html/FIPS10-4_match.pdf FIPS Standard #10]. Users should note that there are differences between the Federal Information Processing Standard (FIPS) country names and the [[UN GeoRegion Codes |UN Country Names]].
*The [http://earth-info.nga.mil/gns/html/help.htm GNS output format] contains various custom codes. Of particular interest are:**LAT and LONG - Latitude and Longitude (Decimal - also available as DMS)** NT - Name Type (Only A,P and L are of use in matching to addresses)***A = Administrative region type feature***P = Populated place type feature***V = Vegetation type feature***L = Locality or area type feature***U = Undersea type feature***R = Streets, highways, roads, or railroad type feature***T = Hypsographic type feature***H = Hydrographic type feature***S = Spot type feature**DC - Designation Code (This provides a refinement of NT, details are in [http://www.edegan.com/repository/GNS-DesignationCodes.txt GNS-DesignationCodes.txt]**SHORT_FORM - a Short Form of the name that is commonly used**FULL_NAME - the Long Form of the name**FULL_NAME_ND - the Long Form of the name without diacritics
