> For the complete documentation index, see [llms.txt](https://docs.os.uk/os-downloads/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/os-downloads/products/buildings-and-infrastructure-portfolio/os-open-toid/release-notes/march-2025-epoch-42.md).

# March 2025 – Epoch 42

This release note provides information about the March 2025 release of OS Open TOID (Epoch 42).

## Feature counts

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

| Product                       | Source Product  | CSV             | GeoPackage      |
| ----------------------------- | --------------- | --------------- | --------------- |
| OS MasterMap Sites Layer      | 48 624          | 48 624          | 48 624          |
| OS MasterMap Highways Network | 20 750 549      | 20 750 549      | 20 750 549      |
| OS MasterMap Topography Layer | 486 046 032     | 486 046 032     | 486 046 032     |
| **Total**                     | **506 845 205** | **506 845 205** | **506 845 205** |

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

## Next release

The next release of OS Open TOID (Epoch 43), is scheduled for **13 May 2025**.


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