Spatial NI / OSNI Open Data

Name: Spatial NI / OSNI Open Data
Creator: Land and Property Services (Ordnance Survey of Northern Ireland), Department of Finance

Land and Property Services (Ordnance Survey of Northern Ireland), Department of Finance

Licence: Open Government Licence v3.0
Cost: Free
Account needed: No
Harvestable: Automated

What it contains

NI's authoritative geospatial base: OSNI Open Data boundaries (counties, wards, district electoral areas, local government districts, settlements), address gazetteer (Pointer), large-scale mapping, and the NI Mapping Application (NIMA) portal for the public sector.

When you need it

Not yet mapped to a project stage. The stage axis is a first pass against a draft matrix, and a record with no stage means nobody has placed it rather than that it is useful at none.

Coverage and detail

Nations: Northern Ireland
Resolution: Boundaries at 50k and 250k generalisation; large-scale mapping to 1:1,250 urban
Formats: GeoJSON, CSV, KML, Shapefile, File Geodatabase; FeatureServer and MapServer
Update cadence: Boundaries updated at review; mapping continuous

Access and machine route

Licence as stated: Open Government Licence v3 for the Open Data tier; NIMA content restricted to the NI public sector
Assertion source: as published by Land and Property Services (Ordnance Survey of Northern Ireland), Department of Finance
Protocol: Esri ArcGIS REST / Hub API v3; OGC WMS/WFS
Harvest note: Yes - the open tier is fully harvestable machine_endpoint field held prose, not a URL: ArcGIS Hub search API + per-layer FeatureServer /query (f=geojson); OGC WMS and WFS links exposed per item; OSNI Developer Services catalogue at experience.arcgis.com

Caveats

NI is not covered by Ordnance Survey GB products, so OSNI is the only source and the Irish Grid (EPSG:29903) / ITM (EPSG:2157) projections differ from EPSG:27700 - every GB-wide dataset in the catalogue needs a reprojection note for NI. Elevation: no open national LiDAR equivalent to the Welsh or Scottish programmes.

Classification

Category: Unassigned
Assigned by: Not yet determined
Depth domain: Surface
Data form: Tabular, Vector
Evidence confidence: Not yet assessed. Only a person can set this.

How current this entry is

Last updated here: 2026-09-22
Last checked against the holder: 2026-09-07
Checked by a person: Not yet. Nobody has read this entry.
Catalogue id: spatial-ni-osni-open-data

Open at Land and Property Services

Openly licensed. No account needed.

Resolved A server answered on 2026-09-08 and returned the expected page. Checked by automated request, not in a browser. A site can answer a script and still fail for a reader, so treat this as a weak signal.

Additional link (GeoJSON, CSV, KML,…) More from Ordnance Survey This record as JSON Report a problem

Land and Property Services (Ordnance Survey of Northern Ireland), Department of Finance. Spatial NI / OSNI Open Data. Accessed via UK Geothermal Data Catalogue, https://catalogue.geothermaluk.org/id/spatial-ni-osni-open-data/. Record spatial-ni-osni-open-data.