The Geoplan Northern Ireland Unit Postcode Boundary file is absolutely unique and is the only one of its type, in both its source and its method of creation.
Geoplan has a rich history in building and maintaining industry leading Postcode Boundary Data, for use in mission critical processes. Serving organisations such as Royal Mail, Ordnance Survey and Google, with de facto UK Postcode data sets since 1984.
OSNI has therefore selected Geoplan as its chosen partner, to ensure that this product meets the highest standards expected for a data set of this type.
Data
Source - Geoplan/OSNI
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
Content information
Overview
The Geoplan Northern Ireland Unit Postcode Boundary file is absolutely unique and is the only one of its type, in both its source and its method of creation.
Geoplan has a rich history in building and maintaining industry leading Postcode Boundary Data, for use in mission critical processes. Serving organisations such as Royal Mail, Ordnance Survey and Google, with de facto UK Postcode data sets since 1984.
OSNI has therefore selected Geoplan as its chosen partner, to ensure that this product meets the highest standards expected for a data set of this type.
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: SHAPE
Postcode Boundaries: Postcode Area(BT), District (e.g. BT1), and Sector (e.g. BT1 1) Boundaries
Map Projection: Irish National Grid or LL WGS84