OSNI 1:1M Raster Map of Northern Ireland County Boundaries

OSNI Open Data provides a 1:1,000,000 scale raster map depicting county-level administrative boundaries for Northern Ireland. This static image file is the smallest-scale raster product from the Ordnance Survey of Northern Ireland, designed for use as a background map in desktop and web applications. The dataset is published under an open government license, facilitating its use for overview mapping and spatial reference.

Use Cases

• Creating background reference maps for web and desktop GIS based on the provided raster image.
• Visualizing the spatial extent of Northern Ireland's counties and parliamentary constituencies.
• Providing a geographic overview for regional planning and environmental assessment at a national scale.

Strengths

• Published under the permissive OGL-UK-3.0 open government license, allowing broad reuse.
• Represents the official 1:1,000,000 scale county boundaries from the authoritative source, OSNI.
• Available on multiple open data platforms (uk_data, eu_open_data), indicating established utility.

Limitations

• No column or attribute data is provided, as the dataset is a static raster image without associated tabular data.
• The 'last updated' metadata shows a future date (2026-07-08), which is inconsistent and suggests potential metadata errors.
• The dataset's utility is limited to visual reference due to its raster format, preventing direct geometric analysis.

Provenance

Source

Ordnance Survey of Northern Ireland (OSNI), published via OpenDataNI.

Collection Method

Derived from official OSNI cartographic data, converted to a raster format.

Freshness

2026-07-08 13:32:42.412476 (Note: This is a future date, indicating a potential metadata error)

Geography

Northern Ireland, covering all county-level administrative boundaries.