County Boundaries for Northern Ireland from OSNI Largescale Database

OSNI Largescale Boundaries is a polygon dataset of county administrative divisions for Northern Ireland. The data was extracted from the Ordnance Survey Northern Ireland Largescale database, topologically cleansed, and attributed to create a seamless layer. This service is published by the Government Digital Service under an Open Government Licence.

Use Cases

• Create regional administrative maps based on the county boundary polygons.
• Perform spatial joins or analysis using the topologically cleansed, seamless dataset.
• Integrate county-level geographic context into applications via the available WMS or GeoJSON service formats.

Strengths

• Data is topologically cleansed to ensure a seamless, consistent polygon dataset.
• Published under a clear Open Government Licence for reuse.
• Available in multiple standard geospatial formats including ESRI Shapefile, GeoJSON, and KML.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Last update date is unknown; freshness unverified.
• Row count and dataset size are unknown, which may limit suitability assessment.

Provenance

Source

Ordnance Survey Northern Ireland (OSNI) Largescale database.

Collection Method

Extracted, topologically cleansed, and attributed from the source database.

Time Range

null

Freshness

Last updated date is unknown.

Geography

Northern Ireland.