OSNI Open Data: Digital Terrain Model for Northern Ireland Sheets 201-250

A Digital Terrain Model (DTM) is a grid of regularly spaced points of known height providing a 3D image of the land surface. This download contains OSNI 10k sheet numbers 201-250. The dataset is published by the Government Digital Service for OpenData under the LPS Open Government Data Licence.

Use Cases

• Generate 3D visualizations of the land surface based on the described DTM grid.
• Conduct terrain analysis for land-use planning based on the height data.
• Integrate DTM data with other geospatial layers like maps or orthophotographs as mentioned in the description.

Strengths

• Data is structured as a regular grid of height points, which is a standard format for terrain models.
• The dataset is published by a government service (Government Digital Service) for open use.

Limitations

• The specific number of rows, columns, and file size are unknown, limiting suitability assessment.
• Column-level documentation is absent; field semantics must be inferred after download.
• Last update date is unknown; freshness unverified.

Provenance

Source

Government Digital Service

Collection Method

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

Time Range

unknown

Freshness

unknown

Geography

Northern Ireland (based on OSNI, the Ordnance Survey of Northern Ireland)