OS Mastermap® Address Layer

Published by Ordnance Survey.   Licensed under “Use limitation dependent upon licence; Licences and agreements explained - http://www.ordnancesurvey.co.uk/business-and-government/licensing/index.html. Read More
Openness rating:
Reason: Content of file appeared to be format "HTML" which receives openness score: 0.
★★★★★  Linked data - data URIs and linked to other data (e.g. RDF)
★★★★☆  Linkable data - served at URIs (e.g. RDF)
★★★☆☆  Structured data in open format (e.g. CSV)
★★☆☆☆  Structured data but proprietry format (e.g. Excel)
★☆☆☆☆  Unstructured data (e.g. PDF)
Score updated: 16/04/2017

Provider: Ordnance Survey, Great Britain

Responsible Party: Ordnance Survey, Great Britain (publisher)


The OS MasterMap Address Layer provides precise coordinates for more than 27 million residential and commercial properties in Great Britain – the most accurate and up-to-date link between any property address and its location on the map. The Address Layer originates from the Royal Mail's postcode address file (PAF®). Ordnance Survey uses on-the-ground GPS survey, aerial imagery and various other techniques to establish precise coordinates for each address and match this to the property on the map – effectively joining up postal and topographic geography, creating a fixed link between the property and its address.

Addresses are subject to a high level of change from:

* the creation of a new property;
* property redevelopment; and
* house or street name changes.

OS MasterMap Address Layer provides a robust mechanism for professional users to track and manage these address changes relating to the actual property on the ground, and a continuity between a physical property (essentially unchanging) and the dynamics describing that property (changeable).

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Dataset Extent

Latitude: 60.86° to 49.86°
Longitude: -8.45° to 1.78°

Data Resources (3)

Resource locator
Online ordering system
Atom feed (INSPIRE Download service)

Additional Links (2)

Source GEMINI2 record
Source GEMINI2 record (formatted)

Additional Information

Added to data.gov.uk 03/06/2011
Theme Mapping
Themes (secondary) Environment
Harvest URL http://os.uk/oswebsite/xml/products
Harvest date 12/03/2014 11:00
Metadata date 24/2/2014
Harvest GUID f1f9ff81-6759-4001-92f1-479bdc46f6b0
Harvest source reference http://www.ordnancesurvey.co.uk/xml/products/AddressLayer.xml
Extent Latitude: 60.86° to 49.86°
Longitude: -8.45° to 1.78°
Spatial reference system urn:ogc:def:crs:EPSG:27700
Dataset reference date 1/4/2003 (creation)
Frequency of update continual
Responsible party Ordnance Survey, Great Britain (publisher)
ISO19139 resource type dataset
Metadata language English
Temporal coverage No value
Schema/Vocabulary No value
Code list No value
Service Level No value
Access constraints No value
Coupled Services (none)