Great Britain Country Boundaries: Multiple Coastline Resolutions

Digital vector boundaries for the constituent countries of Great Britain are provided in five distinct resolutions, from full detail to ultra-generalized 500-meter outlines. Each resolution is available in both an 'extent of the realm' version and a version clipped to the Mean High Water coastline mark. The dataset contains intellectual property rights from both the Ordnance Survey and the UK's Office for National Statistics.

Use Cases

• Creating national-scale reference maps using the ultra-generalized (500m) boundaries for faster rendering.
• Conducting coastal zone analysis by comparing the 'extent of the realm' boundaries with the coastline-clipped versions.
• Integrating country-level administrative units into a larger GIS project using the generalised (20m) boundaries for a balance of detail and performance.
• Serving boundaries via web feature services using the provided ArcGIS REST endpoints for INSPIRE compliance.

Strengths

• Offers five specific geometric resolutions, with file sizes ranging from 168 KB to 29 MB, allowing users to select the appropriate detail for their application.
• Provides boundaries for two distinct legal/geographic concepts: the full extent of the realm and the area clipped to the coastline.
• Is published by the authoritative Office for National Statistics and adheres to INSPIRE viewing and download service standards.

Limitations

• The exact column schema and number of geographic features (rows) are not specified in the available metadata.
• There is a conflict regarding the temporal reference of the data, with sources citing both December 2015 and December 2016 as the 'as at' date.
• Metadata for author, row count, and precise update history is incomplete or missing across the listed platforms.

Provenance

Source

Office for National Statistics (UK), incorporating Ordnance Survey data.

Collection Method

Likely derived from official national mapping and administrative records.

Time Range

2015-12-31 to 2016-12-31

Freshness

The most recent platform update was logged on 2026-07-08, but the underlying data reflects administrative boundaries as of December 2015 or 2016.

Geography

Great Britain (England, Scotland, Wales)