2019 Ortho OSNI: Northern Ireland Shoreline Change Rates Since 1800s

Historical shoreline analysis for the entire Northern Ireland coastline, with change rates calculated at 25-meter intervals. Ulster University produced this dataset by analyzing Ordnance Survey maps and aerial imagery dating back to the early 1800s using the Digital Shoreline Analysis System (DSAS). The end product provides five key rate-of-change statistics, including Net Shoreline Movement and Linear Regression Rate, to visualize coastal evolution.

Use Cases

• Model coastal erosion risk based on historical rate-of-change statistics like End Point Rate (EPR) and Linear Regression Rate (LRR).
• Identify areas of shoreline retreat or accretion using spatially displayed change data collected at 25m intervals.
• Visualize long-term coastal evolution for management planning using shoreline positions from the early 1800s onward.

Strengths

• Analysis is based on all available Ordnance Survey maps and aerial imagery, providing a long-term perspective.
• Rate-of-change statistics are calculated at a high spatial resolution of 25-meter intervals.
• Provides five distinct statistical measures of shoreline change, including Weighted Linear Regression which accounts for measurement uncertainty.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count and dataset size are unknown, which may limit suitability assessment.

Provenance

Source

Ulster University, published via OpenDataNI.

Collection Method

Historical shoreline analysis using Ordnance Survey maps and aerial imagery, processed with the ArcGIS Digital Shoreline Analysis System (DSAS).

Time Range

Early 1800s to at least 2019.

Freshness

Last updated 2026-03-18 11:23:44.864853; freshness should be verified.

Geography

Northern Ireland coastline.