OSNI Open Data: Northern Ireland Land Boundary Polygon

OSNI Largescale NI Outline is a polygon dataset representing the land area of Northern Ireland. The data was derived from Ordnance Survey Northern Ireland Largescale data, topologically cleansed, and attributed to create a seamless dataset. The dataset is provided by the Government Digital Service under an OGL-UK-3.0 license.

Use Cases

• Create base maps for Northern Ireland based on the seamless polygon boundary.
• Perform regional administrative analysis based on the derived land area data.
• Integrate the topologically cleansed outline as a reference layer in web or desktop GIS applications.

Strengths

• Data is topologically cleansed, which likely ensures geometric consistency and reduces errors for spatial analysis.
• Available in multiple geospatial formats (KML, ESRI SHAPE, GEOJSON, CSV, JSON), increasing accessibility for different tools.

Limitations

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

Provenance

Source

Ordnance Survey Northern Ireland (OSNI) Largescale data.

Collection Method

Derived, topologically cleansed, and attributed from source data.

Geography

Northern Ireland