OS Mastermap® Address Layer

Published by Ordnance Survey.   Licensed under “Use limitation dependent upon licence” & Licences and agreements explained
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: 28/02/2015

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)

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://www.ordnancesurvey.co.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)
Gemini2 resource type dataset
Metadata language English
Temporal coverage No value
Access constraints No value
Coupled Services (none)
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