> 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/resources/product-resources/end-of-life-product-documentation/os-detailed-path-network/os-detailed-path-network-technical-specification.md).

# OS Detailed Path Network Technical Specification

This technical specification provides detailed technical information about OS Detailed Path Network. It is targeted at technical users and software developers.

{% hint style="warning" %}

#### Product has reached its End of Life (withdrawal) date

The OS Detailed Path Network product reached its End of Life on 30 September 2026. As of this date, Ordnance Survey ceased to maintain or publish updates to the product, and removed access to the product from the OS Data Hub, OS Features API and OS Vector Tile API.

Supporting product documentation will be removed from this site 12 months after this date, when access to existing data packages in the OS Data Hub is no longer available. Full details, including migration information and FAQs, are available on the [OS Detailed Path Network End of Life information page](/os-downloads/resources/product-resources/end-of-life-product-documentation/os-detailed-path-network/os-detailed-path-network-end-of-life-information.md).
{% endhint %}

The OS Detailed Path Network product is a topologically connected link and node network for roads, tracks, paths and rights of way within the National Parks of Great Britain. The product has been created from a number of existing Ordnance Survey data sources, including OS MasterMap Topography Layer, OS MasterMap Highways Network, 1:25 000 Scale Colour Raster, OS Terrain 5 and OS Terrain 50. The data is intended to provide sufficient detail for routing pedestrians, cyclists and horse riders when using mobile devices, with a typical positional accuracy of 10m.

## Adherence to standards <a href="#bookmark1" id="bookmark1"></a>

OS Detailed Path Network is a derived product that has been designed with consideration of the [INSPIRE](https://inspire.ec.europa.eu/) Transport Networks Data Specification, although INSPIRE does not apply to off road transport. Due to the process of deriving OS Detailed Path Network, feature instances and their identifiers will be regenerated at each data refresh.

## Index

This technical specification includes the following sections:

* [OS Detailed Path Network structure](/os-downloads/resources/product-resources/end-of-life-product-documentation/os-detailed-path-network/os-detailed-path-network-technical-specification/os-detailed-path-network-structure.md)
* [Feature types](/os-downloads/resources/product-resources/end-of-life-product-documentation/os-detailed-path-network/os-detailed-path-network-technical-specification/feature-types.md)
* [Structured data types](/os-downloads/resources/product-resources/end-of-life-product-documentation/os-detailed-path-network/os-detailed-path-network-technical-specification/structured-data-types.md)
* [Code lists](/os-downloads/resources/product-resources/end-of-life-product-documentation/os-detailed-path-network/os-detailed-path-network-technical-specification/code-lists.md)
* [Data quality](/os-downloads/resources/product-resources/end-of-life-product-documentation/os-detailed-path-network/os-detailed-path-network-technical-specification/data-quality.md)
* [GML overview](/os-downloads/resources/product-resources/end-of-life-product-documentation/os-detailed-path-network/os-detailed-path-network-technical-specification/gml-overview.md)
* [GeoPackage overview](/os-downloads/resources/product-resources/end-of-life-product-documentation/os-detailed-path-network/os-detailed-path-network-technical-specification/geopackage-overview.md)
* [Vector tiles overview](/os-downloads/resources/product-resources/end-of-life-product-documentation/os-detailed-path-network/os-detailed-path-network-technical-specification/vector-tiles-overview.md)
* [GML examples](/os-downloads/resources/product-resources/end-of-life-product-documentation/os-detailed-path-network/os-detailed-path-network-technical-specification/gml-examples.md)


---

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