> For the complete documentation index, see [llms.txt](https://docs.os.uk/more-than-maps/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/more-than-maps/os-ngd-migration/comparison-of-os-apis.md).

# Comparison of OS APIs

## Overview

The purpose of this page is to provide a summary of things to consider when migrating from OS Features API and OS Vector Tile API to OS NGD API – Features and OS NGD API – Tiles. It covers the key features of each service, summarises the migration requirements and provides an implementation comparison between the services.

## Key features

The OS NGD APIs are built on modern [OGC API standards](https://ogcapi.ogc.org/), making it easier for organisations to maintain open standards while creating services that are more interoperable and better aligned with modern geospatial and cloud-native architectures. These APIs align with the future direction of OS data services, enabling teams to access more OS NGD data, unlock richer analytics and access the [key benefits of OS NGD](https://docs.os.uk/osngd/introduction-to-os-ngd/os-ngd-key-benefits-to-customers) within their applications.

## API comparison

<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><h3>Comparison of OS Features API and OS NGD API – Features</h3></td><td>This page compares the <strong>OS Features API</strong> and <strong>OS NGD API – Features</strong> to help inform your decision about which API is best suited to provide you with access to authoritative Ordnance Survey feature data.</td><td><a href="/more-than-maps/os-ngd-migration/comparison-of-os-apis/comparison-of-feature-apis.md">Comparison of Feature APIs</a></td></tr><tr><td><h3>Comparison of OS Vector Tile API and OS NGD API – Tiles</h3></td><td>This page compared the <strong>OS Vector Tile API</strong> and <strong>OS NGD API – Tiles</strong> to help you decision which API is best suited to provide a customisable basemap for your project.</td><td><a href="/more-than-maps/os-ngd-migration/comparison-of-os-apis/comparison-of-vector-tile-apis.md">Comparison of Vector Tile APIs</a></td></tr></tbody></table>

## Help and support

### Supporting links

The [OS APIs Documentation](https://docs.os.uk/os-apis) site has further information that you might find useful. The following resources provide additional guidance on OS NGD API – Features and OS NGD API – Tiles:

* [OS NGD API – Features](https://docs.os.uk/os-apis/accessing-os-apis/os-ngd-api-features)
  * [OS NGD API – Features | What data is available?](https://docs.os.uk/os-apis/accessing-os-apis/os-ngd-api-features/what-data-is-available)
* [OS NGD API – Tiles](https://docs.os.uk/os-apis/accessing-os-apis/os-ngd-api-tiles)
  * [OS NGD API – Tiles | What data is available?](https://docs.os.uk/os-apis/accessing-os-apis/os-ngd-api-tiles/what-data-is-available)

### &#xD;Contact us

If you have any questions, need assistance, or want to provide feedback, please don't hesitate to reach out to us at [os.uk/contact-us](https://os.uk/contact-us).


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://docs.os.uk/more-than-maps/os-ngd-migration/comparison-of-os-apis.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.