OSNI Open Data: 10-Meter Digital Terrain Model for Northern Ireland Sheets 251-293

A Digital Terrain Model (DTM) provides a 3D image of the land surface via a grid of regularly spaced height points. This download contains OSNI 10k sheet numbers 251-293 for Northern Ireland, published for OpenData by the Government Digital Service. The dataset is large and may take significant time to download.

Use Cases

• Generate 3D visualizations and fly-throughs based on the described DTM grid and orthophotographs.
• Perform hydrological modeling and watershed analysis based on the detailed land surface elevation data.
• Support civil engineering and construction planning based on accurate terrain height information.
• Conduct landscape change detection and analysis based on the 10-meter resolution DTM.

Strengths

• Provides a 3D representation of the land surface, as described.
• Covers a specific, defined area corresponding to OSNI 10k sheet numbers 251-293.
• Published under the LPS Open Government Data Licence, facilitating reuse.

Limitations

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

Provenance

Source

Government Digital Service

Collection Method

Likely derived from aerial or ground survey data, as it is a Digital Terrain Model.

Time Range

null

Freshness

Last updated is unknown.

Geography

Northern Ireland (specifically areas covered by OSNI 10k sheets 251-293)