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OSNI Open Data - Largescale Boundaries - Townlands

Publisher
OpenDataNI
Updated
8 July 2026
Topic
Not set

Summary

The OSNI Largescale Townlands is a polygon dataset consisting of the Townland boundaries. Townlands are an ancient method of land measurement found only in Ireland and can be very important in genealogical research. These small areas of land can vary in size from a few acres upwards. The data has been derived from OSNI Largescale database and has been topologically cleansed and attributed to create a seamless dataset.
Please Note for Open Data NI Users: Esri Rest API is not Broken, it will not open on its own in a Web Browser but can be copied and used in Desktop and Webmaps

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Data links

Link Format Preview Updated
KML KML 29/5/2025
GeoJSON GEOJSON 29/5/2025
ArcGIS GeoService JSON 29/5/2025
Shapefile SHP 29/5/2025
CSV CSV Preview 29/5/2025

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Additional information

Source Metadata
XML, HTML
Harvest GUID
https://www.arcgis.com/home/item.html?id=01a3c821cdeb4e4da578fd5e0beb8f84&sublayer=5