# Page Not Found

The URL `deep-dive/a-guide-to-coordinate-systems-in-great-britain/from-one-coordinate-system-to-another-geodetic-transformations` does not exist. This page may have been moved, renamed, or deleted.

## Suggested Pages

You may be looking for one of the following:
- [From one coordinate system to another: geodetic transformations](https://docs.os.uk/more-than-maps/a-guide-to-coordinate-systems-in-great-britain/from-one-coordinate-system-to-another-geodetic-transformations.md)
- [What is a geodetic transformation?](https://docs.os.uk/more-than-maps/a-guide-to-coordinate-systems-in-great-britain/from-one-coordinate-system-to-another-geodetic-transformations/what-is-a-geodetic-transformation.md)
- [Helmert datum transformations](https://docs.os.uk/more-than-maps/a-guide-to-coordinate-systems-in-great-britain/from-one-coordinate-system-to-another-geodetic-transformations/helmert-datum-transformations.md)
- [Approximate WGS84 to OSGB36/ODN transformation](https://docs.os.uk/more-than-maps/a-guide-to-coordinate-systems-in-great-britain/from-one-coordinate-system-to-another-geodetic-transformations/approximate-wgs84-to-osgb36-odn-transformation.md)
- [ETRS89 to and from ITRS](https://docs.os.uk/more-than-maps/a-guide-to-coordinate-systems-in-great-britain/from-one-coordinate-system-to-another-geodetic-transformations/etrs89-to-and-from-itrs.md)

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

```
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```

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

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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/more-than-maps/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., `/more-than-maps/a-guide-to-coordinate-systems-in-great-britain/from-one-coordinate-system-to-another-geodetic-transformations.md`).

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