Northern Ireland Postcode Unit Polygons

£1,625 +VAT per user

The Geoplan Postcode Boundary file is absolutely unique, it is the only one of its type in both its source, its method of creation and the maintenance cycle. 

 

Geoplan has provided organisations such as Royal Mail and Google with the de facto UK Postcode data sets they need for mission critical processes, since 1984 and 2009 respectively. The Geoplan Postcode file has been used in the creation of Ordnance Survey Address Base and, since 1999, Geoplan has been contracted to innovate and maintain product for OS, on a quarterly basis (OS Code-Point with Polygons product).

Data

 

Source - Geoplan/OSNI

Recency – Updated quarterly

Geographical Coverage and Accuracy – Northern Ireland 

Projection – EPSG 29903(Irish National Grid) 

Available Formats – Shapefile

Data health

 

Most up to date Postcode data

Updated each quarter

Based upon OSNI pointer, boundary & transport data alongside OSM roads - premium sources of information for Northern Ireland geography

License type

 

License type - Annual

Updated - Quarterly

Content information

Overview

The Geoplan Postcode Boundary file is absolutely unique, it is the only one of its type in both its source, its method of creation and the maintenance cycle. Geoplan has provided organisations such as Royal Mail and Google with the de facto UK Postcode data sets they need for mission critical processes, since 1984 and 2009 respectively. The Geoplan Postcode file has been used in the creation of Ordnance Survey Address Base and, since 1999, Geoplan has been contracted to innovate and maintain product for OS, on a quarterly basis (OS Code-Point with Polygons product).

Waterbodies

27 waterbodies have been removed from the data.These are highlighted in yellow.

Vertical streets

Pointer addresses that exist at a location, shared by other addresseswith differing postcodes are termed VerticalStreets (Vstreets) and are represented by a square in the postcode units, with an identifier of “VBTnnnnn”. AVstreet lookup is provided to cross-reference these with the postcodes that are in these locations.

Bounding geography

The valid addresses are tessellated by counties, within town/land boundaries. These polygons are post processed to align with OSM roads for Northern Ireland, which are filtered to Geoplan’s standard classifications, combined with the Railway feature from OSNI Open Data 50k transport layer. Natural features like waterways are deemed to be captured within the town/land boundary/

Discards & Base maps

Discards

Addresses that do not fall within the OSNILarge Scale Townland boundaries, are not used to generate Unit Postcode Polygons. If this will result in a full postcode not being represented in the polygon file, then the postcode will be supplied in the discards

Base maps

For visualisation, the polygons can be overlaid over a variety of base maps including Open Street Map and Google Satellite view.

Key features

Full Coverage: Northern Ireland coverage

Postcode Points: Postcode Area (BT), District (e.g. BT1), and Sector (e.g. BT11) Boundaries

Postcode Unit Boundaries: Highest level of Postcode Unit boundary accuracy

Updates: Quarterly updated data included in the annual licence

Postcode Unit Points: Address weighted location centroids for NI Postcode Points

Format available: GeoJSON

Postcode Boundaries: Postcode Area(BT), District (e.g. BT1), and Sector (e.g. BT1 1) Boundaries

Map Projection: Irish National Grid or LL WGS84