WGS84
E16682
WGS84 is the global geodetic reference system and standard coordinate framework used for GPS and most modern mapping applications.
All labels observed (14)
| Label | Occurrences |
|---|---|
| WGS84 canonical | 1,020 |
| World Geodetic System 1984 | 77 |
| WGS 84 | 25 |
| World Geodetic System 1984 (WGS84) | 12 |
| WGS84 (approximate coordinates not provided) | 1 |
| WGS84 (approximate) | 1 |
| WGS84 (for geolocation) | 1 |
| WGS84 (for mapping) | 1 |
| WGS84 (implied for geographic location) | 1 |
| WGS84 (implied for mapping) | 1 |
| WGS84 (implied) | 1 |
| WGS84 ECEF | 1 |
| WGS84 ellipsoid | 1 |
| World Geodetic System | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T141496 — 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: WGS84 Context triple: [Harvard Square, hasCoordinateSystem, WGS84]
-
A.
Coordinated Universal Time
Coordinated Universal Time (UTC) is the primary global time standard by which the world regulates clocks and time, serving as the basis for most civil time zones.
-
B.
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.
-
C.
GMT
GMT (Greenwich Mean Time) is the mean solar time at the Royal Observatory in Greenwich, London, historically used as the international civil time standard and the basis for modern time zones.
-
D.
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.
-
E.
DEM
DEM is the former official currency code for the Deutsche Mark, which was Germany’s national currency before the adoption of the euro.
- 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: WGS84 Target entity description: WGS84 is the global geodetic reference system and standard coordinate framework used for GPS and most modern mapping applications.
-
A.
Coordinated Universal Time
Coordinated Universal Time (UTC) is the primary global time standard by which the world regulates clocks and time, serving as the basis for most civil time zones.
-
B.
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.
-
C.
GMT
GMT (Greenwich Mean Time) is the mean solar time at the Royal Observatory in Greenwich, London, historically used as the international civil time standard and the basis for modern time zones.
-
D.
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.
-
E.
DEM
DEM is the former official currency code for the Deutsche Mark, which was Germany’s national currency before the adoption of the euro.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
geodetic datum
ⓘ
geodetic reference system ⓘ global reference frame ⓘ |
| abbreviation |
WGS84
self-linksurface differs
ⓘ
surface form:
WGS 84
|
| axis1Name | geodetic latitude ⓘ |
| axis2Name | geodetic longitude ⓘ |
| axis3Name | ellipsoidal height ⓘ |
| axisUnit |
degree
ⓘ
metre ⓘ |
| category | geodetic standards ⓘ |
| commonCRSCode | EPSG:4326 ⓘ |
| coordinateSystemType |
geocentric Cartesian
ⓘ
geographic 3D ⓘ |
| datumType | Earth-centered Earth-fixed ⓘ |
| developedBy |
Department of Defense
ⓘ
surface form:
United States Department of Defense
|
| dimension | 3D ⓘ |
| ellipsoid |
WGS84
self-linksurface differs
ⓘ
surface form:
WGS84 ellipsoid
|
| epoch | 1984.0 ⓘ |
| flattening | 0.0033528106647474805 ⓘ |
| fullName |
WGS84
self-linksurface differs
ⓘ
surface form:
World Geodetic System 1984
|
| heightReference | ellipsoidal height above WGS84 ellipsoid ⓘ |
| includes |
Earth gravity model
ⓘ
Earth-centered coordinate system ⓘ geoid model ⓘ reference ellipsoid ⓘ |
| initialDefinitionYear | 1984 ⓘ |
| inverseFlattening | 298.257223563 ⓘ |
| latitudeRange | −90 to +90 degree ⓘ |
| longitudeRange | −180 to +180 degree ⓘ |
| primeMeridian | Greenwich ⓘ |
| realizationEpoch | 1984 ⓘ |
| referenceFrame | ITRF-compatible ⓘ |
| regionOfUse | worldwide ⓘ |
| replaced | WGS72 ⓘ |
| scope | global ⓘ |
| semiMajorAxis | 6378137.0 metre ⓘ |
| standardizedBy |
NGA
ⓘ
Department of Defense ⓘ
surface form:
U.S. Department of Defense
|
| supports | global positioning accuracy at meter level or better ⓘ |
| timeDependent | true ⓘ |
| usedAs |
reference for GPS satellite orbits
ⓘ
reference for global digital maps ⓘ |
| usedBy |
GPS
ⓘ
surface form:
Global Positioning System
|
| usedFor |
geodesy
ⓘ
geographic information systems ⓘ global navigation ⓘ mapping ⓘ surveying ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: WGS84 Description of subject: WGS84 is the global geodetic reference system and standard coordinate framework used for GPS and most modern mapping applications.
Referenced by (1,144)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
World Geodetic System 1984
this entity surface form:
World Geodetic System 1984
this entity surface form:
World Geodetic System 1984
this entity surface form:
World Geodetic System 1984
this entity surface form:
WGS 84
this entity surface form:
WGS84 (approximate)
this entity surface form:
World Geodetic System 1984
this entity surface form:
World Geodetic System 1984
this entity surface form:
World Geodetic System 1984
this entity surface form:
WGS 84
this entity surface form:
WGS84 (implied for geographic location)
this entity surface form:
World Geodetic System 1984