> For the complete documentation index, see [llms.txt](https://docs.os.uk/osngd/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.os.uk/osngd/readme-1.md).

# OS NGD Documentation

Welcome to OS NGD documentation! Here you can learn how to get started using OS NGD data via OS Select+Build and the OS NGD APIs.

## What's the OS NGD?

The OS National Geographic Database (OS NGD) is a structured database containing authoritative geospatial data for Great Britain. It provides the most current, comprehensive and richly attributed data describing Great Britain ever produced by OS in non-proprietary data formats that are easily integrated into a wide array of customer systems and workflows.

<table data-card-size="large" data-view="cards"><thead><tr><th></th><th></th><th data-hidden data-card-target data-type="content-ref"></th></tr></thead><tbody><tr><td><h2><span data-gb-custom-inline data-tag="emoji" data-code="1f5a5">🖥️</span> How do I access it?</h2></td><td><p>There are two access methods for OS NGD data:</p><ul><li><a href="/osngd/getting-started/downloading-with-os-select+build.md">OS Select+Build</a> (the download service)</li><li><a href="/osngd/getting-started/access-the-os-ngd-api.md">OS NGD APIs</a></li></ul></td><td><a href="/osngd/introduction-to-os-ngd/os-ngd-explained.md#how-do-i-access-the-os-ngd">OS NGD Explained</a></td></tr><tr><td><h2><span data-gb-custom-inline data-tag="emoji" data-code="1f465">👥</span> Who can use it?</h2></td><td>The OS NGD is available to OS Partners and to public sector organisations who are members of the <a href="https://www.ordnancesurvey.co.uk/customers/public-sector/public-sector-geospatial-agreement">Public Sector Geospatial Agreement (PSGA)</a>.</td><td><a href="/osngd/introduction-to-os-ngd/os-ngd-explained.md#who-can-use-the-os-ngd">OS NGD Explained</a></td></tr></tbody></table>

{% embed url="<https://www.youtube.com/watch?v=1366cDrhd6s>" %}
Short YouTube video explaining what the OS NGD is.
{% endembed %}

## What's available on this site?

This self-serve site is where you will find documentation to help you get started using OS NGD data via the download service of OS Select+Build and the two OS NGD APIs. Using the left-hand-side navigation menu, you can select and view pages and sections of interest, including:

<table data-view="cards"><thead><tr><th></th><th></th><th data-hidden data-card-target data-type="content-ref"></th></tr></thead><tbody><tr><td><h3><span data-gb-custom-inline data-tag="emoji" data-code="2728">✨</span> OS NGD Key Benefits to Customers</h3></td><td>Find out what the key benefits of the OS NGD are.</td><td><a href="/osngd/introduction-to-os-ngd/os-ngd-key-benefits-to-customers.md">OS NGD Key Benefits to Customers</a></td></tr><tr><td><h3><span data-gb-custom-inline data-tag="emoji" data-code="1f5fa">🗺️</span> OS NGD Sample Data</h3></td><td>Download OS NGD sample data or visualise it online.</td><td><a href="/osngd/introduction-to-os-ngd/os-ngd-sample-data.md">OS NGD Sample Data</a></td></tr><tr><td><h3><span data-gb-custom-inline data-tag="emoji" data-code="1f4e3">📣</span> OS NGD News</h3></td><td>Learn about new data and access enhancements recently released for the OS NGD, planned future data enhancements on our roadmap, the change log, recent data improvements, and recent announcements.</td><td><a href="/osngd/os-ngd-news/os-ngd-news.md">OS NGD News</a></td></tr><tr><td><h3><span data-gb-custom-inline data-tag="emoji" data-code="2699">⚙️</span> Data and Service Status</h3></td><td>Find out about OS NGD planned maintenance, any live service disruption, current data issues and resolved data issues.</td><td><a href="/osngd/data-and-service-status/data-and-service-status-information.md">Data and Service Status Information</a></td></tr><tr><td><h3><span data-gb-custom-inline data-tag="emoji" data-code="1f4d6">📖</span> OS NGD Fundamentals</h3></td><td>OS NGD Fundamentals covers the core elements of OS NGD design, including available data formats and file naming, data schema versioning, access methods, data ordering and currency, attribute information for feature types, unique identifiers and coordinate reference systems.</td><td><a href="/osngd/getting-started/os-ngd-fundamentals.md">OS NGD Fundamentals</a></td></tr><tr><td><h3><span data-gb-custom-inline data-tag="emoji" data-code="25b6">▶️</span> Getting Started</h3></td><td>Our getting started guides will help you access, use and style OS NGD data. <br><br>You'll also find in-depth information on OS NGD design, and webinars, tutorials and case studies.</td><td><a href="/osngd/getting-started/getting-started-information.md">Getting Started Information</a></td></tr><tr><td><h3><span data-gb-custom-inline data-tag="emoji" data-code="2753">❓</span> FAQs</h3></td><td>View frequently asked questions about OS NGD data and the download service of OS Select+Build.</td><td><a href="/osngd/getting-started/faqs.md">FAQs</a></td></tr><tr><td><h3><span data-gb-custom-inline data-tag="emoji" data-code="1f5c3">🗃️</span> Data Structure</h3></td><td>Learn about the OS NGD data structure and the data available for each theme, collection and feature type.</td><td><a href="/osngd/data-structure/data-structure-information.md">Data Structure Information</a></td></tr><tr><td><h3><span data-gb-custom-inline data-tag="emoji" data-code="1f4dd">📝</span> Code Lists</h3></td><td>Access all of the code lists for the OS NGD.</td><td><a href="/osngd/code-lists/code-lists-overview.md">Code Lists Overview</a></td></tr></tbody></table>

## Explore OS NGD

In-depth information on OS NGD data, including structure, applications and news:

<table data-view="cards"><thead><tr><th></th><th></th><th data-hidden data-card-target data-type="content-ref"></th></tr></thead><tbody><tr><td><h3><span data-gb-custom-inline data-tag="emoji" data-code="1f4e3">📣</span> OS NGD News</h3></td><td>Learn about new data and access enhancements recently released for the OS NGD.</td><td><a href="/osngd/os-ngd-news/os-ngd-news.md">OS NGD NEWS</a></td></tr><tr><td><h3><span data-gb-custom-inline data-tag="emoji" data-code="1f5c3">🗃️</span> Data Structure</h3></td><td>Data structure pages provide more detailed information about data available for OS NGD themes, collections and feature types.</td><td><a href="/osngd/data-structure/data-structure-information.md">Data Structure Information</a></td></tr><tr><td><h3><span data-gb-custom-inline data-tag="emoji" data-code="1f3a8">🎨</span> Styling OS NGD Data</h3></td><td>Resources for styling OS NGD data.</td><td><a href="/osngd/getting-started/styling-os-ngd-data.md">Styling OS NGD Data</a></td></tr></tbody></table>


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