# Page Not Found

The URL `accessing-os-ngd/access-the-os-ngd-api/os-ngd-api-features/what-data-is-available` does not exist. This page may have been moved, renamed, or deleted.

## Suggested Pages

You may be looking for one of the following:
- [How Building data is created](https://docs.os.uk/osngd/using-os-ngd-data/os-ngd-buildings/how-building-data-is-created.md)
- [Accessing OS NGD APIs](https://docs.os.uk/osngd/getting-started/access-the-os-ngd-api.md)
- [How bus lane data are created](https://docs.os.uk/osngd/using-os-ngd-data/os-ngd-transport/bus-lanes/how-bus-lane-data-are-created.md)
- [Habitat mapping](https://docs.os.uk/osngd/using-os-ngd-data/os-ngd-land-cover-enhancements/habitat-mapping.md)
- [How Field Boundary data is created](https://docs.os.uk/osngd/using-os-ngd-data/os-ngd-structures/field-boundary/how-field-boundary-data-is-created.md)

## How to find the correct page

If the exact page cannot be found, you can still retrieve the information using the documentation query interface.

### Option 1 — Ask a question (recommended)

Perform an HTTP GET request on the documentation index with the `ask` parameter:

```
GET https://docs.os.uk/osngd/using-os-ngd-data/os-ngd-buildings/how-building-data-is-created.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

### Option 2 — Browse the documentation index

Full index: https://docs.os.uk/osngd/sitemap.md

Use this to discover valid page paths or navigate the documentation structure.

### Option 3 — Retrieve the full documentation corpus

Full export: https://docs.os.uk/osngd/llms-full.txt

Use this to access all content at once and perform your own parsing or retrieval. It will be more expensive.

## Tips for requesting documentation

Prefer `.md` URLs for structured content, append `.md` to URLs (e.g., `/osngd/using-os-ngd-data/os-ngd-buildings/how-building-data-is-created.md`).

You may also use `Accept: text/markdown` header for content negotiation.