# AddressBase Core Documentation

Local Authority data is at the heart of AddressBase Core. This data provides you with a complete address product; access to over 33 million addresses each unique referenced with the Unique Property Reference Number (UPRN) and property level coordinates.

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**This product is updated weekly.**
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<figure><img src="https://1897589978-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FcNpJpLP8RROUaWVQo5ea%2Fuploads%2Fa7ZpTCMcoDFuxPEG24D0%2Fab-core-property-classificationjpg.x9d09fbe3.webp?alt=media&#x26;token=e0780813-e237-4825-a50a-c4f2a31de3d8" alt="Representation of AddressBase Core data showing several types of address classifications clustered in a single area" width="563"><figcaption><p>Representation of AddressBase Core data showing several types of address classifications.</p></figcaption></figure>

AddressBase Core takes many of the important elements from the other AddressBase products, such as coordinates, classification and cross-references to connect address information to other products via key identifiers.

AddressBase Core's primary source of addressing information is Local Authority data from the National Land and Property Gazetteer (NLPG) and One Scotland Gazetteer (OSG). They have the legal responsibility to capture and maintain address data for Great Britain, so you are assured of its authenticity and legal nature.

Address information is provided in an easy-to-use format alongside a single line attribute which concatenates all the address elements into what you would expect to see on an envelope. It is updated weekly and is offered in an easier to digest format to make the product as easy to access and use as possible.

Customers have asked for easy file formats, so CSV and GeoPackage are available for this product, with headers included – removing the need for any post-processing. Simply load, or drag and drop into a GIS package to start analysing.

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**Approved addressing records**

AddressBase Core provides approved addressing records for England, Wales and Scotland based on Local Authority holdings of the National Land and Property Gazetteer (NLPG) and One Scotland Address Gazetteer (OSG). Other attribution includes property-level coordinates and secondary level classifications (detailing the use and type of an address).

**Property classification**

Through property classification attributes, you can quickly understand, locate and perform analysis on the type of addresses you want to interact with.

**Authoritative data**

AddressBase Core's primary source of addressing information is local authority data. They have the legal responsibility to capture and maintain address data for Great Britain, so you can be sure of its authenticity and legal nature.

**Weekly updates**

AddressBase Core is released weekly, keeping you more up to date with changes.
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**Property classification**

Making the most of the property classification attributes, you can quickly understand, locate and perform analysis on the type of addresses you want to interact with.

**Easy cross-referencing**

AddressBase Core makes it easier to locate, match and gain insights from other location data with the benefit of having  key identifiers referenced throughout. The Unique Property Reference Number (UPRN), Unique Street Reference Number (USRN) and Topographic Identifier (TOID) allow users to reference to other OS products.
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* **Access:** Download via the [OS Data Hub](https://osdatahub.os.uk/)
* **Data theme:** Address
* **Data structure:** Vector – Points
* **Coverage:** Great Britain
* **Scale:** 1:1 250 to 1:10 000
* **Format:** CSV, GeoPackage
* **Ordering area:** All of Great Britain or customisable area (5km² tiles or user-defined polygon)
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**Advantage of AddressBase Core over other AddressBase products**

AddressBase Core takes many of the high importance items from the other AddressBase products, such as coordinates, classifications (type of address) and links to other important identifiers; but it also includes a single attribute for an address line, is updated weekly, and is offered in an easier to digest format to make the product as easy to access and use as possible.

**Properties yet to be built or have been demolished**

Properties yet to be built, or those which have been demolished, do not appear in AddressBase Core. In order to keep AddressBase Core as simple as possible, these records are not present. If these are critical to you, please look at AddressBase Premium.

**AddressBase Core epoch correspondence**

AddressBase Core is released weekly and has a different data extraction date compared to the 6-weekly release schedule of the other AddressBase products. Due to these differences, AddressBase Core will not correspond to any of the epochs.

**Coverage of AddressBase Core**

AddressBase Core covers Great Britain only, i.e. England, Wales and Scotland. It does not include Northern Ireland and the Channel Islands.

**Data from Royal Mail’s PAF**

The database is a vital component of the single address gazetteer database and is in each of the AddressBase products where there has been a match confirming the address to the LLPG address.
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## How to get this product

Access to this product is free for PSGA (Public Sector Geospatial Agreement) Members. You can [check if your organisation is a member of the PSGA on the OS website](https://www.ordnancesurvey.co.uk/customers/public-sector/psga-member-finder).

The [AddressBase Core product page on the OS website](https://www.ordnancesurvey.co.uk/products/addressbase-core#get) has advice on how to get the product for businesses, developers, OS Partners and PSGA Members (i.e. government and the public sector).

Alternatively, you can try out the full product for free for three months by applying for [a Data Exploration licence](https://www.ordnancesurvey.co.uk/licensing/data-exploration-licence); this licence is primarily designed for organisations either considering becoming an OS Partner or who want to trial OS Premium data before working with an existing OS Partner.

## Sample data

### Download AddressBase Core sample data <a href="#download-os-egs-sample-data" id="download-os-egs-sample-data"></a>

You can download sample data for the product for free from the [OS Data Hub](https://osdatahub.os.uk/data/downloads/sample/AddressBaseCore). The sample data are available in CSV format and cover one area (Exeter).

### Visualise AddressBase Core sample data online

This product is available to try out free online using one of our three sets of sample data (Exeter, Newport and Inverness) through the OS MasterMap Product Viewer:

<table data-view="cards" data-full-width="false"><thead><tr><th></th><th></th><th data-hidden></th><th data-hidden data-card-cover data-type="image">Cover image</th><th data-hidden data-card-target data-type="content-ref"></th></tr></thead><tbody><tr><td><strong>OS MasterMap Product Viewer</strong></td><td>Interactive demonstrator of OS MasterMap Generation data</td><td></td><td data-object-fit="cover" data-alt="Example image showing OS VectorMap Local product data over an urban area."><a href="https://1897589978-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FcNpJpLP8RROUaWVQo5ea%2Fuploads%2Fuld7V42IKrB8ovpC1JXB%2FVectorMap-Local-1.png?alt=media&#x26;token=cb3e8ae9-d669-4bc9-b7a7-5f479d780447">VectorMap-Local-1.png</a></td><td><a href="https://experience.arcgis.com/experience/20981dabcb14402687dccb437a4a78fb/">https://experience.arcgis.com/experience/20981dabcb14402687dccb437a4a78fb/</a></td></tr></tbody></table>

## What's next?

To access documentation and resources relating to this product, please refer to the following:

<table data-view="cards"><thead><tr><th></th><th></th><th></th><th data-hidden data-card-target data-type="content-ref"></th><th data-hidden data-card-cover data-type="image">Cover image</th></tr></thead><tbody><tr><td><strong>AddressBase Core Lightning Talk</strong></td><td>A helpful introductory article hosted on our More than Maps platform providing additional information and context about using AddressBase Core data.</td><td></td><td><a href="https://docs.os.uk/more-than-maps/data-demonstrators/addressing-and-location-demonstrators/addressbase-core">https://docs.os.uk/more-than-maps/data-demonstrators/addressing-and-location-demonstrators/addressbase-core</a></td><td data-object-fit="cover" data-alt="Graphic showing the names of four of the addressing products: AddressBase, AddressBase Core, AddressBase Plus and AddressBase Premium."><a href="https://1897589978-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FcNpJpLP8RROUaWVQo5ea%2Fuploads%2FTXhIkG8xvAPSY5Kp62cK%2Fimage%20(2).png?alt=media&#x26;token=918014b7-bd66-446a-8e55-065527247b49">image (2).png</a></td></tr><tr><td><strong>Overview</strong></td><td>The Overview introduces AddressBase Core, giving context for all users – highlighting key features, providing examples of potential uses, and listing details such as file sizes, supply formats, etc.</td><td></td><td><a href="https://docs.os.uk/os-downloads/products/addresses-and-names-portfolio/addressbase-core/addressbase-core-overview">https://docs.os.uk/os-downloads/products/addresses-and-names-portfolio/addressbase-core/addressbase-core-overview</a></td><td data-object-fit="cover" data-alt="Example image showing AddressBase Core product data over a background map."><a href="https://1897589978-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FcNpJpLP8RROUaWVQo5ea%2Fuploads%2FSi5V3hnnUXRtrL9SC7Y1%2FHeader%20Image.png?alt=media&#x26;token=a7a17e8c-b1f4-46d8-8f58-6e9401434707">Header Image.png</a></td></tr><tr><td><strong>Getting Started Guide</strong></td><td>The getting started guide provides instructions for using AddressBase Core in different software applications. Users with limited technical knowledge will be able to follow this guide.</td><td></td><td><a href="addressbase-core/addressbase-core-getting-started-guide">addressbase-core-getting-started-guide</a></td><td data-object-fit="cover" data-alt="Example image showing AddressBase Core product data over a background map."><a href="https://1897589978-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FcNpJpLP8RROUaWVQo5ea%2Fuploads%2FANnzizF07oRdUTZJEVks%2FLA%20completeness.png?alt=media&#x26;token=ac7c442e-e6ad-4ada-91ab-a190aa25a1d5">LA completeness.png</a></td></tr><tr><td><strong>Technical Specification</strong></td><td>The technical specification provides detailed technical information about AddressBase Core. It is targeted at technical users and software developers.</td><td></td><td><a href="addressbase-core/addressbase-core-technical-specification">addressbase-core-technical-specification</a></td><td data-object-fit="cover" data-alt="Example image showing AddressBase Core product data over a background map."><a href="https://1897589978-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FcNpJpLP8RROUaWVQo5ea%2Fuploads%2FQsHRrOZKao0bTcLaaYWy%2Fcross%20ref.png?alt=media&#x26;token=4cd57c91-8e06-4dc3-87da-2a1376251409">cross ref.png</a></td></tr><tr><td><strong>Downloads</strong></td><td>The downloads page provides links and resources to support the application of AddressBase Core within your environment.</td><td></td><td><a href="addressbase-core/addressbase-core-downloads">addressbase-core-downloads</a></td><td></td></tr><tr><td><strong>Ordnance Survey Website</strong></td><td>View AddressBase Core product information and find out how to get this product on the OS website.</td><td></td><td><a href="https://www.ordnancesurvey.co.uk/products/addressbase-core">https://www.ordnancesurvey.co.uk/products/addressbase-core</a></td><td></td></tr></tbody></table>

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New users should start with the Overview to gain high-level insight into the product. The Getting Started Guide will help you to begin using product data in different software systems. The Technical Specification contains detailed technical insights.
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