The Property Registration Authority (Land Registry) and Ordnance Survey Ireland (OSI) enjoy a very close working relationship. The Land Registry utilises Ordnance Survey Ireland’s topographic mapping to cross-reference and associate their boundary information. This forms the basis of all Land Registry digital map data.

Ordnance Survey Ireland and Land Registry have compiled the information in the document linked to below to help customers understand their respective roles.

Ordnance Survey Ireland’s Role

Ordnance Survey Ireland is the national mapping agency of Ireland. It is the State Agency responsible for the official, definitive surveying and topographic mapping of the Republic of Ireland. As this mapping is topographic, it only represents the physical features on the ground at the time of survey. The features shown must fall within the specification for the survey scale and within agreed accuracy tolerances. OSI maps never indicate legal property boundaries, nor do they show ownership of physical features. Although some property boundaries may be coincident with surveyed map features, no assumptions should be made in these instances and consequently it is not possible to identify the position of a legal property boundary from an OSI map. OSI has a continuous mapping revision programme for the whole of the Republic of Ireland. Changes that have occurred on the ground since the property was registered may result in differences between later OSI map editions and the mapping used by the Land Registry.

Download the full document here.