OSNI Large-scale Boundaries: Land Area Polygons of Northern Ireland

Northern Ireland's land area is represented in this polygon dataset. The data was extracted from the OSNI Largescale database, topologically cleansed, and attributed to create a seamless dataset. It was last updated on 2026-07-08 and is published by OpenDataNI under the OGL-UK-3.0 license.

Use Cases

• Create regional maps based on the seamless polygon dataset.
• Perform spatial joins and analysis based on the topologically cleansed boundaries.
• Integrate boundary data into web mapping services based on the available GeoJSON and KML formats.
• Conduct land area calculations based on the attributed polygon features.

Strengths

• Data has been topologically cleansed to create a seamless dataset.
• Available in multiple geospatial formats including SHP, GeoJSON, and KML.
• Published under the permissive OGL-UK-3.0 license.

Limitations

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

Provenance

Source

OpenDataNI

Collection Method

Extracted from the OSNI Largescale database and topologically cleansed.

Time Range

null

Freshness

Last updated 2026-07-08 13:32:10.369396; freshness should be verified.

Geography

Northern Ireland