Ordnance Survey National Grid
E305285
The Ordnance Survey National Grid is the standard geographic coordinate system used in Great Britain for mapping and referencing locations with high precision.
All labels observed (13)
How this entity was disambiguated
This entity first appeared as the object of triple T2854492 — 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: Ordnance Survey National Grid Context triple: [Heathfield, hasCoordinateSystem, Ordnance Survey National Grid]
-
A.
Amersham
Amersham is a historic market town in southeast England known for its picturesque old town, Chilterns countryside setting, and role as a commuter hub into London.
-
B.
Reigate Heath
Reigate Heath is a historic heathland and common near Reigate in Surrey, England, known for its open countryside, golf course, and preserved windmill.
-
C.
Cobham
Cobham is a village in Surrey, England, known for its affluent residential character, proximity to London, and scenic riverside setting.
-
D.
Cobham
Cobham is a clan associated with the Efik people, an ethnic group primarily found in southeastern Nigeria.
-
E.
Tring
Tring is a historic market town in the west of Hertfordshire, England, known for its rural surroundings and proximity to the Chiltern Hills.
- 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: Ordnance Survey National Grid Target entity description: The Ordnance Survey National Grid is the standard geographic coordinate system used in Great Britain for mapping and referencing locations with high precision.
-
A.
Amersham
Amersham is a historic market town in southeast England known for its picturesque old town, Chilterns countryside setting, and role as a commuter hub into London.
-
B.
Reigate Heath
Reigate Heath is a historic heathland and common near Reigate in Surrey, England, known for its open countryside, golf course, and preserved windmill.
-
C.
Cobham
Cobham is a village in Surrey, England, known for its affluent residential character, proximity to London, and scenic riverside setting.
-
D.
Cobham
Cobham is a clan associated with the Efik people, an ethnic group primarily found in southeastern Nigeria.
-
E.
Tring
Tring is a historic market town in the west of Hertfordshire, England, known for its rural surroundings and proximity to the Chiltern Hills.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
geographic coordinate system
ⓘ
map grid ⓘ |
| adoptedBy | UK government mapping agencies ⓘ |
| alsoKnownAs |
British National Grid
ⓘ
OS National Grid ⓘ |
| authority | Ordnance Survey ⓘ |
| coordinateDimension | 2D ⓘ |
| coordinateFormat |
alphanumeric grid reference
ⓘ
eastings and northings ⓘ |
| country | Great Britain ⓘ |
| covers |
Great Britain mainland
ⓘ
linked to:
Great Britain
offshore islands of Great Britain ⓘ |
| datum | OSGB36 ⓘ |
| ellipsoid |
Airy 1830
ⓘ
linked to:
Airy 1830 ellipsoid
|
| gridSquareSize |
1 km
ⓘ
1 m ⓘ 10 km ⓘ 10 m ⓘ 100 km ⓘ 100 m ⓘ |
| hasComponent |
eastings
ⓘ
grid squares ⓘ grid zones ⓘ northings ⓘ |
| hasTransformationTo | WGS84 ⓘ |
| notUsedIn |
Northern Ireland
ⓘ
Republic of Ireland ⓘ |
| operator | Ordnance Survey ⓘ |
| precision | high precision ⓘ |
| projection | Transverse Mercator ⓘ |
| purpose |
land surveying
ⓘ
location referencing ⓘ topographic mapping ⓘ |
| referenceMeridian |
Greenwich meridian
ⓘ
linked to:
Prime Meridian
|
| region | British Isles ⓘ |
| relatedTo | WGS84 ⓘ |
| scaleOptimizedFor | large-scale mapping ⓘ |
| standardFor |
Ordnance Survey maps
ⓘ
linked to:
Ordnance Survey
|
| usedFor |
emergency services location referencing
ⓘ
environmental monitoring ⓘ hiking and outdoor recreation ⓘ infrastructure planning ⓘ navigation on OS maps ⓘ |
| usedIn |
England
ⓘ
Scotland ⓘ Wales ⓘ |
| usesEastingsNorthings | true ⓘ |
| usesGridLetters | true ⓘ |
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: Ordnance Survey National Grid Description of subject: The Ordnance Survey National Grid is the standard geographic coordinate system used in Great Britain for mapping and referencing locations with high precision.
Referenced by (89)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Ordnance Survey National Grid
linked to: Ordnance Survey National Grid
linked to: Ordnance Survey National Grid
West Midlands Ambulance Service
→
coordinateSystem
→
Ordnance Survey National Grid (for operations)
ⓘ
linked to: Ordnance Survey National Grid
subject linked to:
Threadneedle Street, London
linked to: Ordnance Survey National Grid
linked to: Ordnance Survey National Grid
linked to: Ordnance Survey National Grid
Shefford Lower School
→
hasGeographicCoordinateSystem
→
Ordnance Survey National Grid (inferred, as in England)
ⓘ
linked to: Ordnance Survey National Grid
linked to: Ordnance Survey National Grid
linked to: Ordnance Survey National Grid
linked to: Ordnance Survey National Grid