1976 OS 27 10K: Northern Ireland Historical Shoreline Change Rates

Historical shoreline analysis for the entire Northern Ireland coastline, with rate-of-change statistics calculated at 25-meter intervals. The dataset was created by Ulster University using Ordnance Survey maps and aerial imagery, processed with the Digital Shoreline Analysis System (DSAS) in ArcGIS. It provides a dynamic picture of coastal change from the early 1800s onward.

Use Cases

• Modeling coastal erosion risk based on historical rate-of-change statistics like End Point Rate (EPR) and Linear Regression Rate (LRR).
• Identifying areas of shoreline retreat or accretion using spatially displayed Net Shoreline Movement (NSM) data.
• Assessing long-term coastal change dynamics for management plans using shoreline positions from the early 1800s.
• Visualizing shoreline change over annual to decadal time periods using the provided geospatial data formats.

Strengths

• Rate-of-change statistics were collected at a high spatial resolution of 25-meter intervals.
• Analysis is based on all available historical Ordnance Survey maps and aerial imagery.
• Provides multiple statistical measures of change, including Net Shoreline Movement and Weighted Linear Regression.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Data may reflect geographic bias inherent to the Northern Ireland coastline.

Provenance

Source

Ulster University, via OpenDataNI.

Collection Method

Analysis of historical Ordnance Survey maps and aerial imagery using the ArcGIS Digital Shoreline Analysis System (DSAS).

Time Range

Early 1800s onward.

Freshness

Last updated 2026-03-18 11:22:47.200611; freshness should be verified.

Geography

Northern Ireland coastline.