Key Dataset Description - Central Postcode Directory

Guide to Key Dataset Description

Title MAIN CENTRAL POSTCODE DIRECTORY.
Alternate Title Main CPD.
Originator Office for National Statistics (ONS).
Abstract A file, available in various forms of electronic media, that provides a link between current and terminated unit postcodes within the United Kingdom to higher level geographical entities. The file also contains national grid references for postcodes.
Start Date of Capture 1982.
End Date of Capture On-going.
Frequency of Update Quarterly (though monthly updates can be provided).
Resource Type Held in the corporate geographic database on the ONS mainframe.
Access Constraints Generally none; but the supply of data may need control through licensing.
Keywords Postcodes
Postcode directory
Coding
Area codes
Spatial referencing
Grid references
Postcode look-up
Areal links
Geographic extent United Kingdom (full dataset); the Channel Islands and the Isle of Man (limited dataset).
System of Spatial Referencing by Coordinates National grid : Ordnance Survey (Great Britain).
Irish Grid: Ordnance Survey (Northern Ireland).
System of Spatial Referencing by Description Geographic entities directly associated to unit postcodes using a single address within each unit postcode as the reference points. Links are created either through clerical checking or imputation.
Descriptive name for geographic extent United Kingdom, the Channel Islands and the Isle of Man.
Level of Spatial Detail

Unit postcodes to country.

National Grid references : 100m (with limited 10m) resolution - England and Wales; 10m resolution - Scotland and Northern Ireland .

Copyright Area codes : copyright Office for National Statistics.
Postcodes : copyright Royal Mail.
Format/Media/On-line Ordering information Magnetic tape
Cartridge
CD-ROM
DAT
Floppy disc (for limited datasets)
Additional Information

The ONS Geographic Database (maintained by the ONS Geographic Support Service (OGSS)) holds a range of geographic entities linked to unit postcodes (derived from the Royal Mail’s Postcode Address File (PAF) that allows other versions of postcode directories to be produced. A flexible output system allows customers to specify their data requirements. Extracts based on customers’ preferred areas can also be provided.
OGSS User Guide 4.
CPD User Guide (version 2).

Dataset Association

Ordnance Survey (GB):   Code-Point

Ordnance Survey (NI):   COMPAS

Royal Mail :  POSTZON , Postcode Address File (PAF)

Contact Name or Title Mrs Chris Smart
Contact Address Office for National Statistics
ONS Geography
Segensworth Road
Titchfield
Contact City FAREHAM
Hampshire
Contact Country England
Contact Postcode PO15 5RR
Contact Phone no +44 (0) 1329 813477
Contact Fax no +44 (0) 1329 813383
Contact email address ons.geography@ons.gov.uk
Contact web site address www.ons.gov.uk

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