OSNI Open Data: Benchmark Height Points Above Mean Sea Level in Belfast

Point data of benchmark heights above Mean Sea Level Belfast in meters. The dataset is published by OpenDataNI for OpenData under the OGL-UK-3.0 license. The data was last updated on 2026-07-08, though the Land and Property Services (LPS) no longer maintains the network, so its continued integrity cannot be guaranteed.

Use Cases

• Establishing orthometric height references based on benchmark point data.
• Validating digital elevation models using known height benchmarks.
• Supporting land surveying and construction planning with historical height data.

Strengths

• Data is available in multiple geospatial formats including CSV, KML, and GEOJSON.
• The dataset has a specific last updated timestamp of 2026-07-08 13:30:59.320454.

Limitations

• The data provider notes the network is no longer maintained, so data integrity cannot be guaranteed.
• Row count and column-level documentation are unknown, limiting suitability assessment.
• The description metadata is limited; actual data quality requires manual inspection after download.

Provenance

Source

OpenDataNI

Collection Method

Likely collected as part of a historical geodetic survey network.

Freshness

Last updated 2026-07-08 13:30:59.320454

Geography

Belfast, Northern Ireland