AddressBase Plus Technical Specification

This technical specification provides detailed technical information about AddressBase Plus. It is targeted at technical users and software developers.

AddressBase Plus contains current properties including addresses sourced from local authorities, Ordnance Survey and Royal Mail, all provided with a Unique Property Reference Number (UPRN). It has more records than AddressBase as it includes objects without postal addresses and live records captured by Local Authorities but not matched to Royal Mail PAF data.

The product enables the end-user to locate an address or property on a map using either X, Y coordinates supplied on a British National Grid or Latitude and Longitude coordinates provided on an ETRS89 projection.

The product also includes cross references to OS MasterMap products via OS MasterMap Topography Layer and OS MasterMap Highways Network Layer TOID references.

This technical specification includes the following sections:

• Data formats

• Supply and update

• AddressBase Premium structure

• Feature types

• Code lists and enumerations

• CSV to GML mapping

• Example records

All AddressBase products include the Unique Property Reference Number (UPRN) and are based on same coordinate reference systems.

Please see the General AddressBase information section for additional information that applies across all AddressBase products.