National Assembly for Wales Constituency Boundaries, December 2015

Five versions of digital vector boundaries for National Assembly for Wales Constituencies as at December 2015, ranging from full resolution to ultra generalised (500m). The dataset contains both Ordnance Survey and ONS Intellectual Property Rights and is provided by the Office for National Statistics. File sizes range from 34 KB for the ultra generalised version to 4 MB for the full resolution versions.

Use Cases

• Create electoral maps based on the ultra generalised (500m) boundaries for low-detail visualizations.
• Perform spatial analysis using the full resolution boundaries clipped to the coastline (Mean High Water mark).
• Integrate constituency shapes into a larger UK geospatial database based on the available vector formats.
• Compare boundary detail levels for performance testing in web mapping applications.

Strengths

• Provides five distinct boundary versions with specific file sizes (e.g., 34 KB, 80 KB, 511 KB, 4 MB).
• Includes clear provenance, containing both Ordnance Survey and ONS Intellectual Property Rights.
• Offers multiple download formats (GEOJSON, CSV, KML, ZIP) and direct REST API access via ArcGIS services.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Data is specific to a single snapshot in time (December 2015); boundaries may have changed since.

Provenance

Source

Office for National Statistics

Collection Method

Digital vector boundaries derived from authoritative sources, likely survey and administrative data.

Time Range

December 2015

Freshness

Last updated 2026-07-08 13:33:17.595372; freshness should be verified.

Geography

Wales