# August 2025 – Epoch 45

## Feature counts

Feature counts for this release are provided in the following table:

| Product                       | Source Product  | CSV             | GeoPackage      |
| ----------------------------- | --------------- | --------------- | --------------- |
| OS MasterMap Sites Layer      | 49 076          | 49 076          | 49 076          |
| OS MasterMap Highways Network | 20 811 243      | 20 811 243      | 20 811 243      |
| OS MasterMap Topography Layer | 487 941 849     | 487 941 849     | 487 941 849     |
| **Total**                     | **508 802 168** | **508 802 168** | **508 802 168** |

There are no missing features and no duplicated TOIDs in this release. No significant errors have been identified.

{% hint style="info" %}
In this release, the tile ‘NW’ was found to be noticeably larger than the previous release (\~5% larger) in both CSV and GPKG formats. OS data improvement work in the area on a small number of transport features has caused a larger than usual percentage change. This is expected, as the tile 'NW' only includes a small area of land around The Rhins of Galloway in South Western Scotland, and most of the tile is sea.
{% endhint %}

## Next release

The next release of OS Open TOID (Epoch 46), is scheduled for **15 September 2025**.


---

# Agent Instructions: 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:

```
GET https://docs.os.uk/os-downloads/products/buildings-and-infrastructure-portfolio/os-open-toid/release-notes/august-2025-epoch-45.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.

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.