OSNI Open Data: 10-Meter Digital Terrain Model for Sheets 101-150

OSNI Open Data provides a Digital Terrain Model (DTM) consisting of a grid of regularly spaced points of known height. This download contains DTM data for 10k sheet numbers 101-150, published by the Government Digital Service under an Open Government Licence. The dataset is described as large and may take time to download.

Use Cases

• Generate 3D visualizations of the land surface based on the grid of known height points.
• Conduct terrain analysis for hydrological or geological modeling based on the DTM elevation data.
• Create composite landscape models by integrating this DTM with other geospatial data like orthophotographs mentioned in the description.

Strengths

• Data is published under a specific Open Government Licence (http://reference.data.gov.uk/id/open-government-licence).
• The description explicitly defines a DTM as a grid of regularly spaced height points, clarifying its structure.

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.

Provenance

Source

Government Digital Service

Collection Method

Likely derived from aerial or ground survey data, as typical for DTMs.

Time Range

null

Freshness

Last updated date is unknown; freshness unverified.

Geography

Covers the area corresponding to OSNI 10k sheet numbers 101-150, which suggests Northern Ireland.