North American Datum of 1983

E244555

geodetic datum reference system

North American Datum of 1983 is a geodetic reference system used across North America to define precise locations on the Earth's surface for mapping, surveying, and navigation.

Try in SPARQL Jump to: Surface forms Disambiguation Statements Elicitation Referenced by

All labels observed (4)

Label	Occurrences
North American Datum of 1983 canonical	3
NAD 83	1
NAD83	1
NAD83(CORS96)	1

How this entity was disambiguated

This entity first appeared as the object of triple T2209724 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07

Target entity: North American Datum of 1983
Context triple: [National Spatial Reference System, historicalComponent, North American Datum of 1983]

A. National Spatial Reference System
The National Spatial Reference System is the official coordinate framework used in the United States to define precise locations, elevations, and boundaries for mapping, surveying, and navigation.
B. WGS84
WGS84 is the global geodetic reference system and standard coordinate framework used for GPS and most modern mapping applications.
C. National Geodetic Survey
The National Geodetic Survey is the U.S. federal agency responsible for defining, maintaining, and providing access to the national coordinate system used for mapping, charting, and navigation.
D. International Terrestrial Reference System
The International Terrestrial Reference System is a globally standardized, Earth-centered coordinate framework used for precise positioning, navigation, and geodetic measurements.
E. San Bernardino meridian
The San Bernardino meridian is a principal survey meridian used as a reference line for land surveying and mapping in Southern California and parts of Nevada.
F. None of above. chosen
G. Unsure - the case is ambiguous/there is not enough information to decide.

NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07

Target entity: North American Datum of 1983
Target entity description: North American Datum of 1983 is a geodetic reference system used across North America to define precise locations on the Earth's surface for mapping, surveying, and navigation.

A. National Spatial Reference System
The National Spatial Reference System is the official coordinate framework used in the United States to define precise locations, elevations, and boundaries for mapping, surveying, and navigation.
B. WGS84
WGS84 is the global geodetic reference system and standard coordinate framework used for GPS and most modern mapping applications.
C. National Geodetic Survey
The National Geodetic Survey is the U.S. federal agency responsible for defining, maintaining, and providing access to the national coordinate system used for mapping, charting, and navigation.
D. International Terrestrial Reference System
The International Terrestrial Reference System is a globally standardized, Earth-centered coordinate framework used for precise positioning, navigation, and geodetic measurements.
E. San Bernardino meridian
The San Bernardino meridian is a principal survey meridian used as a reference line for land surveying and mapping in Southern California and parts of Nevada.
F. None of above. chosen

Statements (50)

Predicate	Object
instanceOf	geodetic datum ⓘ reference system ⓘ
abbreviation	North American Datum of 1983 self-linksurface differs ⓘ surface form: NAD83
accountsFor	tectonic plate motion ⓘ
approximateAlignment	WGS84 ⓘ
basedOnEllipsoid	GRS80 ⓘ
continentUsedIn	North America ⓘ
coordinateSystem	geodetic 2D ⓘ geodetic 3D ⓘ
coordinateUnit	degree ⓘ
countryUsedIn	Canada ⓘ Mexico ⓘ United States of America ⓘ surface form: United States
datumType	horizontal datum ⓘ
defines	ellipsoidal height ⓘ geodetic coordinates ⓘ horizontal positions ⓘ latitude ⓘ longitude ⓘ
epoch	1983.0 ⓘ
hasRealization	NAD83(1986) ⓘ NAD83(2011) ⓘ North American Datum of 1983 self-linksurface differs ⓘ surface form: NAD83(CORS96) NAD83(HARN) ⓘ NAD83(NSRS2007) ⓘ
introducedToReplace	local-astronomic NAD27 framework ⓘ
maintainedBy	National Geodetic Survey ⓘ Natural Resources Canada ⓘ
plateFixedTo	North American Plate ⓘ surface form: North American tectonic plate
realizationOf	Earth-centered Earth-fixed ⓘ surface form: Earth-centered Earth-fixed reference frame
referenceFrameType	geocentric ⓘ
referenceSurface	reference ellipsoid ⓘ
regionCovered	Alaska ⓘ Canada ⓘ Caribbean ⓘ Central America ⓘ Mexico ⓘ contiguous United States ⓘ surface form: continental United States
relatedTo	WGS84 ⓘ surface form: World Geodetic System 1984
replaced	North American Datum of 1927 ⓘ
supportsProjection	State Plane Coordinate System ⓘ UTM ⓘ
timeDependent	true ⓘ
usedBy	GIS professionals ⓘ federal mapping agencies in the United States ⓘ provincial and federal mapping agencies in Canada ⓘ surveyors ⓘ
usedFor	mapping ⓘ navigation ⓘ surveying ⓘ

How these facts were elicited

Referenced by (6)

Full triples — surface form annotated when it differs from this entity's canonical label.

National Spatial Reference System → historicalComponent → North American Datum of 1983 ⓘ

NGS → defines → North American Datum of 1983 ⓘ

subject surface form: National Geodetic Survey

NSRS → historicalDatum → North American Datum of 1983 ⓘ

this entity surface form: NAD 83

North American Datum of 1983 → abbreviation → North American Datum of 1983 self-linksurface differs ⓘ

this entity surface form: NAD83

North American Datum of 1983 → hasRealization → North American Datum of 1983 self-linksurface differs ⓘ

this entity surface form: NAD83(CORS96)

North American Vertical Datum of 1988 → usedWith → North American Datum of 1983 ⓘ

All labels observed (4)

How this entity was disambiguated Show

Statements (50)

How these facts were elicited Show

Referenced by (6)

How this entity was disambiguated

How these facts were elicited