OSGB36
E1003013
OSGB36 is the geodetic datum used as the reference framework for mapping Great Britain, underpinning the Ordnance Survey National Grid coordinate system.
All labels observed (1)
| Label | Occurrences |
|---|---|
| OSGB36 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T12772702 — 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: OSGB36 Context triple: [Ordnance Survey National Grid, datum, OSGB36]
-
A.
OSGB grid
OSGB grid is the British national mapping coordinate system used to precisely locate points on maps of Great Britain.
-
B.
Ordnance Survey National Grid
The Ordnance Survey National Grid is the standard geographic coordinate system used in Great Britain for mapping and referencing locations with high precision.
-
C.
Irish Transverse Mercator
Irish Transverse Mercator is a modern, high-precision map projection and coordinate reference system used for surveying and mapping across Ireland.
-
D.
Ordnance Survey National Grid (approximate)
The Ordnance Survey National Grid (approximate) is a British mapping reference system that provides standardized grid-based location coordinates across Great Britain.
-
E.
WGS84
WGS84 is the global geodetic reference system and standard coordinate framework used for GPS and most modern mapping applications.
- 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: OSGB36 Target entity description: OSGB36 is the geodetic datum used as the reference framework for mapping Great Britain, underpinning the Ordnance Survey National Grid coordinate system.
-
A.
OSGB grid
OSGB grid is the British national mapping coordinate system used to precisely locate points on maps of Great Britain.
-
B.
Ordnance Survey National Grid
The Ordnance Survey National Grid is the standard geographic coordinate system used in Great Britain for mapping and referencing locations with high precision.
-
C.
Irish Transverse Mercator
Irish Transverse Mercator is a modern, high-precision map projection and coordinate reference system used for surveying and mapping across Ireland.
-
D.
Ordnance Survey National Grid (approximate)
The Ordnance Survey National Grid (approximate) is a British mapping reference system that provides standardized grid-based location coordinates across Great Britain.
-
E.
WGS84
WGS84 is the global geodetic reference system and standard coordinate framework used for GPS and most modern mapping applications.
- F. None of above. chosen
Statements (41)
| Predicate | Object |
|---|---|
| instanceOf |
geodetic datum
ⓘ
terrestrial reference system ⓘ |
| alsoKnownAs | Ordnance Survey Great Britain 1936 NERFINISHED ⓘ |
| axisUnits | degrees ⓘ |
| basedOn | triangulation of Great Britain ⓘ |
| category | British geodetic datum ⓘ |
| coordinateReferenceSystemCode | EPSG:4277 NERFINISHED ⓘ |
| coordinateSystemType | ellipsoidal ⓘ |
| countryUsedIn | Great Britain NERFINISHED ⓘ |
| datumOrigin | near Newlyn, Cornwall (mean sea level) ⓘ |
| datumShiftRelativeTo | WGS84 NERFINISHED ⓘ |
| datumType | horizontal datum ⓘ |
| ellipsoidInverseFlattening | 299.3249646 ⓘ |
| ellipsoidSemiMajorAxis | 6377563.396 metres ⓘ |
| epoch | 1936 ⓘ |
| globalAccuracyRelativeToWGS84 | lower than modern global datums ⓘ |
| gridSystem | Ordnance Survey National Grid NERFINISHED ⓘ |
| hasTransformationParametersDefinedBy | EPSG registry NERFINISHED ⓘ |
| introducedBy | Ordnance Survey NERFINISHED ⓘ |
| latitudeRange | 49.9 to 61.1 degrees ⓘ |
| localFit | optimized for Great Britain landmass ⓘ |
| longitudeRange | -7.56 to 1.84 degrees ⓘ |
| maintainedBy | Ordnance Survey NERFINISHED ⓘ |
| notUsedIn | Northern Ireland NERFINISHED ⓘ |
| primeMeridian | Greenwich NERFINISHED ⓘ |
| realizationOf | Airy 1830 ellipsoid fitted to Great Britain ⓘ |
| referenceEllipsoid | Airy 1830 NERFINISHED ⓘ |
| regionCovered |
England
NERFINISHED
ⓘ
Isle of Man NERFINISHED ⓘ Scotland NERFINISHED ⓘ Wales NERFINISHED ⓘ |
| requiresTransformationTo | ETRS89 NERFINISHED ⓘ |
| supersededInPracticeBy | ETRS89 for some applications ⓘ |
| underpins | Ordnance Survey National Grid NERFINISHED ⓘ |
| usedBy | Ordnance Survey NERFINISHED ⓘ |
| usedFor |
engineering applications in Great Britain
ⓘ
land surveying ⓘ large-scale mapping ⓘ topographic mapping of Great Britain ⓘ |
| usedIn | British National Grid NERFINISHED ⓘ |
| usedWithProjection | Transverse Mercator NERFINISHED ⓘ |
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: OSGB36 Description of subject: OSGB36 is the geodetic datum used as the reference framework for mapping Great Britain, underpinning the Ordnance Survey National Grid coordinate system.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.