British National Grid
E112713
The British National Grid is the Ordnance Survey’s coordinate reference system used to map and locate positions across Great Britain with high precision.
All labels observed (7)
| Label | Occurrences |
|---|---|
| British National Grid canonical | 16 |
| Ordnance Survey National Grid | 4 |
| British National Grid (OSGB36) | 2 |
| British National Grid (implied) | 2 |
| British National Grid reference system | 2 |
| OSGB36 | 1 |
| OSGB36 geodetic datum | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T955331 — 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: British National Grid Context triple: [Snaefell, gridReferenceSystem, British National Grid]
-
A.
JointGrid
JointGrid is a Seaborn plotting object that creates multi-panel visualizations combining joint and marginal distributions of two variables.
-
B.
Letchworth Garden City
Letchworth Garden City is a pioneering planned town in Hertfordshire, England, widely regarded as the world’s first garden city and a key model for early 20th-century urban planning.
-
C.
Maidenhead
Maidenhead is a large riverside town on the River Thames in Berkshire, England, known as a commuter hub for London with a mix of historic and modern development.
-
D.
Binsted, Hampshire, England
Binsted, Hampshire, England is a rural village in southern England notable as the burial place of World War II field marshal Bernard Montgomery.
-
E.
Raworth
Raworth is a residential suburb located near Maitland in the Hunter Region of New South Wales, Australia.
- 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: British National Grid Target entity description: The British National Grid is the Ordnance Survey’s coordinate reference system used to map and locate positions across Great Britain with high precision.
-
A.
JointGrid
JointGrid is a Seaborn plotting object that creates multi-panel visualizations combining joint and marginal distributions of two variables.
-
B.
Letchworth Garden City
Letchworth Garden City is a pioneering planned town in Hertfordshire, England, widely regarded as the world’s first garden city and a key model for early 20th-century urban planning.
-
C.
Maidenhead
Maidenhead is a large riverside town on the River Thames in Berkshire, England, known as a commuter hub for London with a mix of historic and modern development.
-
D.
Binsted, Hampshire, England
Binsted, Hampshire, England is a rural village in southern England notable as the burial place of World War II field marshal Bernard Montgomery.
-
E.
Raworth
Raworth is a residential suburb located near Maitland in the Hunter Region of New South Wales, Australia.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
coordinate reference system
ⓘ
projected coordinate system ⓘ |
| alsoKnownAs |
National Grid (Great Britain)
ⓘ
linked to:
National Grid
OS National Grid ⓘ |
| approximateIntroductionPeriod | mid 20th century ⓘ |
| basedOnDatum |
OSGB36
ⓘ
linked to:
Ordnance Survey National Grid
|
| centralMeridian | 2 degrees West ⓘ |
| coordinateOrder | easting then northing ⓘ |
| country | Great Britain ⓘ |
| coversTerritory |
England
ⓘ
Scotland ⓘ Wales ⓘ |
| excludesTerritory |
Channel Islands
ⓘ
linked to:
Channel Islands (crown dependencies)
Isle of Man ⓘ
linked to:
Isle of Man (crown dependency)
Northern Ireland ⓘ |
| falseEasting | 400000 metres ⓘ |
| falseNorthing | -100000 metres ⓘ |
| gridReferenceFormat | alphanumeric grid reference ⓘ |
| gridSquareSystem | 100 km lettered grid squares ⓘ |
| gridUnit | metre ⓘ |
| gridZoneDesignation | single national grid zone ⓘ |
| hasEPSGCode | 27700 ⓘ |
| introducedBy | Ordnance Survey ⓘ |
| latitudeOfOrigin | 49 degrees North ⓘ |
| maintainedBy | Ordnance Survey ⓘ |
| mapSeriesUsingSystem |
Ordnance Survey Explorer maps
ⓘ
Ordnance Survey Landranger maps ⓘ
linked to:
OS Landranger
|
| projectionType | Transverse Mercator ⓘ |
| region | Europe ⓘ |
| relatedTo |
OSGB36 geodetic datum
ⓘ
linked to:
British National Grid
|
| replacedSystem | Cassini grid systems used by Ordnance Survey ⓘ |
| requiresTransformationTo | WGS84 ⓘ |
| scaleFactorAtCentralMeridian | 0.9996012717 ⓘ |
| supportsPrecisionLevels |
1 km grid reference
ⓘ
1 m grid reference ⓘ 10 m grid reference ⓘ 100 m grid reference ⓘ |
| typicalPrecision | 1 metre or better ⓘ |
| typicalTransformationMethod | Helmert transformation ⓘ |
| usedBy | Ordnance Survey ⓘ |
| usedFor |
engineering surveying
ⓘ
land registration ⓘ navigation on Ordnance Survey maps ⓘ topographic mapping ⓘ |
| usedInDiscipline |
cartography
ⓘ
geodesy ⓘ geographic information systems ⓘ |
| usesEllipsoid | Airy 1830 ellipsoid ⓘ |
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: British National Grid Description of subject: The British National Grid is the Ordnance Survey’s coordinate reference system used to map and locate positions across Great Britain with high precision.
Referenced by (28)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: British National Grid
linked to: British National Grid
linked to: British National Grid
linked to: British National Grid
linked to: British National Grid
subject linked to:
RAFHIGHWYCOMBE
linked to: British National Grid
linked to: British National Grid
linked to: British National Grid
subject linked to:
Ordnance Survey National Grid (approximate)
linked to: British National Grid
linked to: British National Grid
linked to: British National Grid
linked to: British National Grid