OSNI Open Data: Northern Ireland Country Boundary Polygon 2016

A polygon dataset representing the land area of Northern Ireland. The data was extracted from the Ordnance Survey of Northern Ireland (OSNI) Largescale database, topologically cleansed, and attributed to create a seamless boundary dataset. It is published by Land & Property Services under the Open Government Licence and was last updated on the platform in July 2026.

Use Cases

• Create base maps for Northern Ireland based on the official large-scale boundary.
• Perform spatial joins or analysis using the topologically cleansed polygon geometry.
• Integrate the boundary into web mapping services using the provided ESRI REST or WMS endpoints.
• Develop applications requiring accurate Northern Ireland country outlines for visualization or planning.

Strengths

• Data is topologically cleansed, suggesting a seamless and consistent geometry.
• Available in multiple geospatial formats (GEOJSON, KML, ESRI REST, WMS) for different use cases.
• Published under the permissive Open Government Licence (OGL-UK-3.0) for commercial and non-commercial use.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• The description references a 2016 boundary, but the platform update date is 2026; temporal accuracy should be verified.
• Row count and specific attribute details are unknown, which may limit suitability assessment.

Provenance

Source

Ordnance Survey of Northern Ireland (OSNI) Largescale database, published by Land & Property Services.

Collection Method

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

Time Range

Referenced as 2016.

Freshness

Last updated on the platform 2026-07-08 13:32:23.031042; the underlying data is referenced as 2016.

Geography

Northern Ireland.