> 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/addresses-and-names-portfolio/os-open-names/os-open-names-overview/product-supply.md).

# Product supply

## Available formats <a href="#id-3.1-available-formats" id="id-3.1-available-formats"></a>

OS Open Names is available in the following formats:

* Comma-separated values (CSV)
* Geography Markup Language (GML) 3.2.1
* GeoPackage

## Supply mechanism <a href="#id-3.2-supply-mechanism" id="id-3.2-supply-mechanism"></a>

OS Open Names is supplied as an online download from the [OS Data Hub](https://osdatahub.os.uk/).

In addition to the data product, OS Open Names content is available to PSGA (Public Sector Geospatial Agreement) Members and OS Partners through the OS Names API, which is accessible via the [OS Data Hub](https://osdatahub.os.uk/).

## Product update schedule <a href="#id-3.3-product-update-schedule" id="id-3.3-product-update-schedule"></a>

OS Open Names is updated from Ordnance Survey’s data content stores and released to customers every three months (in January, April, July and October) to ensure the latest named features are published.

## Coverage and file sizes <a href="#id-3.4-coverage-and-file-sizes" id="id-3.4-coverage-and-file-sizes"></a>

Coverage for OS Open Names is Great Britain. File sizes for the formats are as follows:

* CSV: 96MB
* GML 3.2.1: 184MB
* GeoPackage: 256MB


---

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