Irish grid reference system
E86697
The Irish grid reference system is a national coordinate framework used to map and locate positions across the island of Ireland with standardized alphanumeric grid references.
All labels observed (7)
| Label | Occurrences |
|---|---|
| Irish Grid | 3 |
| Irish Grid Reference System | 3 |
| Irish grid reference system canonical | 2 |
| Ireland Transverse Mercator (legacy grid) | 1 |
| Irish Grid datum | 1 |
| Irish National Grid | 1 |
| Irish national grid | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T722732 — 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: Irish grid reference system Context triple: [Cathedral Quarter, coordinateSystem, Irish grid reference system]
-
A.
Douglas, County Cork, Ireland
Douglas, County Cork, Ireland is a suburban town on the outskirts of Cork City, known as a residential and commercial area and as the birthplace of actor Cillian Murphy.
-
B.
Munster
Munster is a historic province in the south of Ireland, known for its major role in Irish history, culture, and conflicts, including the 17th-century wars.
-
C.
Gaeltacht regions of Ireland
The Gaeltacht regions of Ireland are designated areas, primarily along the western seaboard, where Irish (Gaeilge) is preserved and promoted as the community’s daily spoken language and a core element of cultural identity.
-
D.
Callan, County Kilkenny, Ireland
Callan, County Kilkenny, Ireland, is a historic market town in the southeast of the country known as the birthplace of White House architect James Hoban.
-
E.
Connacht
Connacht is one of the four traditional provinces of Ireland, located in the west of the island and historically known for its Gaelic culture and rugged landscapes.
- 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: Irish grid reference system Target entity description: The Irish grid reference system is a national coordinate framework used to map and locate positions across the island of Ireland with standardized alphanumeric grid references.
-
A.
Douglas, County Cork, Ireland
Douglas, County Cork, Ireland is a suburban town on the outskirts of Cork City, known as a residential and commercial area and as the birthplace of actor Cillian Murphy.
-
B.
Munster
Munster is a historic province in the south of Ireland, known for its major role in Irish history, culture, and conflicts, including the 17th-century wars.
-
C.
Gaeltacht regions of Ireland
The Gaeltacht regions of Ireland are designated areas, primarily along the western seaboard, where Irish (Gaeilge) is preserved and promoted as the community’s daily spoken language and a core element of cultural identity.
-
D.
Callan, County Kilkenny, Ireland
Callan, County Kilkenny, Ireland, is a historic market town in the southeast of the country known as the birthplace of White House architect James Hoban.
-
E.
Connacht
Connacht is one of the four traditional provinces of Ireland, located in the west of the island and historically known for its Gaelic culture and rugged landscapes.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
geodetic coordinate system
ⓘ
map grid ⓘ national grid reference system ⓘ |
| appliesTo | island of Ireland ⓘ |
| axisOrientation |
eastings
ⓘ
northings ⓘ |
| basedOn |
Airy Modified ellipsoid
ⓘ
surface form:
Airy Modified 1849 ellipsoid
|
| coexistsWith | Irish Transverse Mercator ⓘ |
| coordinateFormat |
alphanumeric grid reference
ⓘ
eastings and northings ⓘ |
| coordinateReferenceDimension | 2D ⓘ |
| coordinateReferenceType | projected coordinate system ⓘ |
| coordinateUnits | metres ⓘ |
| country | Ireland ⓘ |
| covers |
Northern Ireland
ⓘ
Ireland ⓘ
surface form:
Republic of Ireland
|
| datum | Airy Modified ellipsoid ⓘ |
| distinguishedFrom |
Irish Transverse Mercator
ⓘ
surface form:
Irish Transverse Mercator coordinate system
|
| hasAbbreviation |
Irish grid reference system
self-linksurface differs
ⓘ
surface form:
Irish Grid
|
| hasFeature |
grid letters omitted over the Atlantic to the west
ⓘ
lettered 100 km grid squares ⓘ numeric eastings and northings within grid squares ⓘ origin located southwest of Ireland ⓘ standardized national reference frame ⓘ |
| maintainedBy | national mapping agencies of Ireland ⓘ |
| mapProjectionZone | single national grid zone ⓘ |
| projection | Transverse Mercator projection ⓘ |
| purpose | to uniquely identify locations in Ireland ⓘ |
| referenceSurface | mean sea level ⓘ |
| region | Europe ⓘ |
| relatedTo | British National Grid ⓘ |
| replacedBy | Irish Transverse Mercator ⓘ |
| spatialReferenceScope | national ⓘ |
| standardizedBy | national cartographic standards in Ireland ⓘ |
| timePeriod | 20th century ⓘ |
| usedBy |
Ordnance Survey Ireland headquarters
ⓘ
surface form:
Ordnance Survey Ireland
Ordnance Survey of Northern Ireland ⓘ |
| usedFor |
emergency services location referencing
ⓘ
environmental mapping ⓘ geocoding addresses in Ireland ⓘ infrastructure planning ⓘ land surveying ⓘ military mapping in Ireland ⓘ navigation ⓘ property mapping ⓘ topographic mapping ⓘ |
| usedIn |
digital mapping systems
ⓘ
paper maps ⓘ |
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: Irish grid reference system Description of subject: The Irish grid reference system is a national coordinate framework used to map and locate positions across the island of Ireland with standardized alphanumeric grid references.
Referenced by (12)
Full triples — surface form annotated when it differs from this entity's canonical label.
Irish grid reference system
→
hasAbbreviation
→
Irish grid reference system
self-linksurface differs
ⓘ
this entity surface form:
Irish Grid
this entity surface form:
Irish national grid
this entity surface form:
Irish Grid Reference System
this entity surface form:
Irish Grid Reference System
this entity surface form:
Irish Grid
this entity surface form:
Irish Grid Reference System
this entity surface form:
Irish National Grid
this entity surface form:
Irish Grid datum
this entity surface form:
Ireland Transverse Mercator (legacy grid)
this entity surface form:
Irish Grid