OSNI Open Data: County Boundaries of Northern Ireland

A polygon dataset of county boundaries for Northern Ireland, extracted from the Ordnance Survey of Northern Ireland (OSNI) Largescale database. The data has been topologically cleansed and attributed to create a seamless dataset, published by the Government Digital Service under an Open Government Licence.

Use Cases

• Create thematic maps based on county-level administrative boundaries.
• Perform spatial joins and analysis using the topologically cleansed polygon data.
• Integrate county boundaries into web mapping applications or desktop GIS software.
• Use as a base layer for regional planning or demographic studies in Northern Ireland.

Strengths

• Data is topologically cleansed, ensuring geometric consistency for analysis.
• Published under an Open Government Licence, allowing for reuse.
• Available in multiple geospatial formats (KML, GeoJSON, ESRI SHAPE) for interoperability.

Limitations

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

Provenance

Source

Ordnance Survey of Northern Ireland (OSNI) Largescale database.

Collection Method

Extracted, topologically cleansed, and attributed from source database.

Time Range

null

Freshness

null

Geography

Northern Ireland