OSNI Benchmark Heights for Northern Ireland

OSNI Open Data provides point data of benchmark heights above mean sea level in Belfast, measured in meters. The dataset is published by OpenDataNI for open use under the OGL-UK-3.0 license. Its last update was recorded on 2026-07-08 13:31:21.319523.

Use Cases

• Validating historical survey measurements based on benchmark height data.
• Referencing legacy elevation points for geospatial analysis in Northern Ireland.
• Establishing context for modern GNSS and geoid model height calculations.

Strengths

• Data is provided in multiple geospatial formats including CSV, GEOJSON, JSON, KML, and WMS.
• The dataset is licensed under the OGL-UK-3.0 for open use.

Limitations

• The description notes the network is no longer maintained, so data integrity cannot be guaranteed.
• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.

Provenance

Source

OpenDataNI

Collection Method

Likely derived from historical land survey network data.

Freshness

Last updated 2026-07-08 13:31:21.319523; freshness should be verified.

Geography

Northern Ireland, specifically Belfast.