OSNI Open Data: 10-Meter Resolution Digital Terrain Model for Northern Ireland

Northern Ireland's land surface elevation data provided by the Ordnance Survey of Northern Ireland (OSNI). This dataset is a Digital Terrain Model (DTM), consisting of a grid of regularly spaced points of known height covering sheet numbers 151-200 at a 10-meter resolution. The Government Digital Service publishes this data under the Open Government Licence.

Use Cases

• Generate 3D visualizations of the land surface based on the described grid of elevation points.
• Conduct terrain analysis for hydrological modeling or flood risk assessment using the DTM.
• Support civil engineering and construction planning with accurate ground elevation data.
• Create composite landscape models by integrating this DTM with other geospatial data like orthophotographs.

Strengths

• Data is provided by the authoritative national mapping agency, OSNI.
• The description specifies a regular grid structure and a 10-meter resolution.
• Published under a permissive Open Government Licence for reuse.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• The last update date is unknown; freshness unverified.
• The dataset size and download time are noted as large, which may require significant bandwidth and storage.

Provenance

Source

Ordnance Survey of Northern Ireland (OSNI)

Collection Method

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Time Range

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Freshness

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Geography

Northern Ireland (specific sheet numbers 151-200)