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

OSNI Open Data provides a Digital Terrain Model (DTM) consisting of a grid of regularly spaced points of known height for Northern Ireland. The dataset covers Ordnance Survey Northern Ireland (OSNI) 10k sheet numbers 251-293 and can be used to create a 3D image of the land surface when combined with other data like maps or orthophotographs. The Government Digital Service publishes this dataset under the LPS Open Government Data Licence.

Use Cases

• Generate 3D visualizations and elevation maps based on the described grid of height points.
• Conduct terrain analysis for hydrological modeling or flood risk assessment based on the DTM.
• Support civil engineering and infrastructure planning with detailed land surface elevation data.
• Create composite landscape models by integrating the DTM with other geospatial datasets mentioned in the description.

Strengths

• Data is provided by an official government source (OSNI/Government Digital Service).
• The description specifies the data's purpose for creating 3D land surface images.
• Dataset is published under a specific open government license.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count, file size, and last update date are unknown, which may limit suitability assessment.
• The description notes the dataset is large and may take significant time to download.

Provenance

Source

Ordnance Survey Northern Ireland (OSNI) / Government Digital Service

Collection Method

Likely derived from aerial or ground survey data, but the specific method is not stated.

Time Range

null

Freshness

Last updated date is unknown; freshness unverified.

Geography

Northern Ireland, covering the area of OSNI 10k sheet numbers 251-293.