# Resources - [Product Resources](https://docs.os.uk/os-downloads/resources/product-resources.md): This section holds useful product information, such as refresh dates, news, sample data, the roadmap, format getting started guides, EOL notices & a summary of what products are in the PSGA. - [Product Refresh Dates](https://docs.os.uk/os-downloads/resources/product-resources/product-refresh-dates.md): Update schedules for all of the OS Download data products. - [Product Announcements](https://docs.os.uk/os-downloads/resources/product-resources/product-announcements.md): A page detailing any newsworthy announcements for the OS Download data products. - [Product Sample Data](https://docs.os.uk/os-downloads/resources/product-resources/product-sample-data.md): Download sample data for OS Download products or visualise it online. - [Getting Started with GeoPackage and Vector Tiles Guides](https://docs.os.uk/os-downloads/resources/product-resources/getting-started-with-geopackage-and-vector-tiles-guides.md): Guides to help you get started using GeoPackage and vector tiles formats to view and explore OS data. - [Getting Started with GeoPackage](https://docs.os.uk/os-downloads/resources/product-resources/getting-started-with-geopackage-and-vector-tiles-guides/getting-started-with-geopackage.md): This guide helps you to get started using GeoPackage – a lightweight format that can contain large amounts of complex data in a single, easy to distribute and ready to use file. - [Accessing GeoPackage data via GIS software](https://docs.os.uk/os-downloads/resources/product-resources/getting-started-with-geopackage-and-vector-tiles-guides/getting-started-with-geopackage/accessing-geopackage-data-via-gis-software.md) - [Loading GeoPackage into a database](https://docs.os.uk/os-downloads/resources/product-resources/getting-started-with-geopackage-and-vector-tiles-guides/getting-started-with-geopackage/loading-geopackage-into-a-database.md) - [Reading GeoPackage data via FME](https://docs.os.uk/os-downloads/resources/product-resources/getting-started-with-geopackage-and-vector-tiles-guides/getting-started-with-geopackage/reading-geopackage-data-via-fme.md) - [Getting Started with Vector Tiles](https://docs.os.uk/os-downloads/resources/product-resources/getting-started-with-geopackage-and-vector-tiles-guides/getting-started-with-vector-tiles.md): This guide will help you get started using vector tiles (MBTiles) – lightweight tiles that are efficient and quick to render, letting you create customised, high-resolution, beautiful mapping. - [Installing vector tiles in GIS software](https://docs.os.uk/os-downloads/resources/product-resources/getting-started-with-geopackage-and-vector-tiles-guides/getting-started-with-vector-tiles/installing-vector-tiles-in-gis-software.md) - [Using OS styles to get started in Mapbox Studio](https://docs.os.uk/os-downloads/resources/product-resources/getting-started-with-geopackage-and-vector-tiles-guides/getting-started-with-vector-tiles/using-os-styles-to-get-started-in-mapbox-studio.md) - [Hosting and serving your own vector tiles](https://docs.os.uk/os-downloads/resources/product-resources/getting-started-with-geopackage-and-vector-tiles-guides/getting-started-with-vector-tiles/hosting-and-serving-your-own-vector-tiles.md) - [Using OS styles on vector tiles you have created](https://docs.os.uk/os-downloads/resources/product-resources/getting-started-with-geopackage-and-vector-tiles-guides/getting-started-with-vector-tiles/using-os-styles-on-vector-tiles-you-have-created.md) - [Product downloads](https://docs.os.uk/os-downloads/resources/product-resources/getting-started-with-geopackage-and-vector-tiles-guides/getting-started-with-vector-tiles/product-downloads.md) - [End of Life Product Notices](https://docs.os.uk/os-downloads/resources/product-resources/end-of-life-product-notices.md): Information about what OS Download data products are being withdrawn / becoming End of Life over the next 18 months. - [End of Life Notice – OS Detailed Path Network](https://docs.os.uk/os-downloads/resources/product-resources/end-of-life-product-notices/end-of-life-notice-os-detailed-path-network.md): The End of Life notice for the OS Detailed Path Network product, containing key dates, the reasoning behind the product withdrawal, product migration guidance, and FAQs. - [End of Life Notice – OS MasterMap Greenspace Layer](https://docs.os.uk/os-downloads/resources/product-resources/end-of-life-product-notices/end-of-life-notice-os-mastermap-greenspace-layer.md): The End of Life notice for the OS MasterMap Greenspace Layer product, containing key dates, the reasoning behind the product withdrawal, product migration guidance and FAQs. - [End of Life Notice – AddressBase](https://docs.os.uk/os-downloads/resources/product-resources/end-of-life-product-notices/end-of-life-notice-addressbase.md): The End of Life notice for the AddressBase product, containing key dates, the reasoning behind the product withdrawal and product migration guidance. - [End of Life Notice – AddressBase Plus](https://docs.os.uk/os-downloads/resources/product-resources/end-of-life-product-notices/end-of-life-notice-addressbase-plus.md): The End of Life notice for the AddressBase Plus product, containing key dates, the reasoning behind the product withdrawal and product migration guidance. - [End of Life Notice – AddressBase Plus Islands](https://docs.os.uk/os-downloads/resources/product-resources/end-of-life-product-notices/end-of-life-notice-addressbase-plus-islands.md): The End of Life notice for the AddressBase Plus Islands product, containing key dates, the reasoning behind the product withdrawal and product migration guidance. - [End of Life Product Documentation](https://docs.os.uk/os-downloads/resources/product-resources/end-of-life-product-documentation.md): Documentation for OS Download data products that have been withdrawn / become End of Life within the past 12 months. - [OS MasterMap Water Network Layer Documentation](https://docs.os.uk/os-downloads/resources/product-resources/end-of-life-product-documentation/os-mastermap-water-network-layer.md): Here you will find all documentation for the OS MasterMap Water Network Layer product. - [OS MasterMap Water Network Layer End of Life information](https://docs.os.uk/os-downloads/resources/product-resources/end-of-life-product-documentation/os-mastermap-water-network-layer/end-of-life-notice-os-mastermap-water-network-layer.md): The End of Life information for the OS MasterMap Water Network Layer product, containing key dates, the reasoning behind the product withdrawal, product migration guidance, and FAQs. - [Release Notes](https://docs.os.uk/os-downloads/resources/product-resources/end-of-life-product-documentation/os-mastermap-water-network-layer/release-notes.md): Release notes for the final four releases of OS MasterMap Water Network Layer. - [January 2026](https://docs.os.uk/os-downloads/resources/product-resources/end-of-life-product-documentation/os-mastermap-water-network-layer/release-notes/january-2026.md): This release note provides information about the January 2026 release of OS MasterMap Water Network Layer. - [October 2025](https://docs.os.uk/os-downloads/resources/product-resources/end-of-life-product-documentation/os-mastermap-water-network-layer/release-notes/october-2025.md): This release note provides information about the October 2025 release of OS MasterMap Water Network Layer. - [July 2025](https://docs.os.uk/os-downloads/resources/product-resources/end-of-life-product-documentation/os-mastermap-water-network-layer/release-notes/july-2025.md): This release note provides information about the July 2025 release of OS MasterMap Water Network Layer. - [April 2025](https://docs.os.uk/os-downloads/resources/product-resources/end-of-life-product-documentation/os-mastermap-water-network-layer/release-notes/april-2025.md): This release note provides information about the April 2025 release of OS MasterMap Water Network Layer. - [January 2025](https://docs.os.uk/os-downloads/resources/product-resources/end-of-life-product-documentation/os-mastermap-water-network-layer/release-notes/january-2025.md): This release note provides information about the January 2025 release of OS MasterMap Water Network Layer. - [OS MasterMap Water Network Layer Overview](https://docs.os.uk/os-downloads/resources/product-resources/end-of-life-product-documentation/os-mastermap-water-network-layer/os-mastermap-water-network-layer-overview.md): This overview introduces OS MasterMap Water Network Layer and gives context for all users – highlighting key features, providing examples of uses, and listing details such as file sizes, etc. - [Feature types in the product](https://docs.os.uk/os-downloads/resources/product-resources/end-of-life-product-documentation/os-mastermap-water-network-layer/os-mastermap-water-network-layer-overview/feature-types-in-the-product.md): The core feature types available in OS MasterMap Water Network Layer. - [Standards and CRS](https://docs.os.uk/os-downloads/resources/product-resources/end-of-life-product-documentation/os-mastermap-water-network-layer/os-mastermap-water-network-layer-overview/standards-and-crs.md) - [Product supply](https://docs.os.uk/os-downloads/resources/product-resources/end-of-life-product-documentation/os-mastermap-water-network-layer/os-mastermap-water-network-layer-overview/product-supply.md) - [OS MasterMap Water Network Layer Getting Started Guide](https://docs.os.uk/os-downloads/resources/product-resources/end-of-life-product-documentation/os-mastermap-water-network-layer/os-mastermap-water-network-layer-getting-started-guide.md): This getting started guide provides instructions for using OS MasterMap Water Network Layer in different applications. Users with limited technical knowledge will be able to follow this guide. - [Requirements for using the data](https://docs.os.uk/os-downloads/resources/product-resources/end-of-life-product-documentation/os-mastermap-water-network-layer/os-mastermap-water-network-layer-getting-started-guide/requirements-for-using-the-data.md) - [Structure of the supplied data](https://docs.os.uk/os-downloads/resources/product-resources/end-of-life-product-documentation/os-mastermap-water-network-layer/os-mastermap-water-network-layer-getting-started-guide/structure-of-the-supplied-data.md) - [Loading GML data into a GIS](https://docs.os.uk/os-downloads/resources/product-resources/end-of-life-product-documentation/os-mastermap-water-network-layer/os-mastermap-water-network-layer-getting-started-guide/loading-gml-data-into-a-gis.md) - [Creating a water network using ESRI software](https://docs.os.uk/os-downloads/resources/product-resources/end-of-life-product-documentation/os-mastermap-water-network-layer/os-mastermap-water-network-layer-getting-started-guide/creating-a-water-network-using-esri-software.md) - [OS MasterMap Water Network Layer Technical Specification](https://docs.os.uk/os-downloads/resources/product-resources/end-of-life-product-documentation/os-mastermap-water-network-layer/os-mastermap-water-network-layer-technical-specification.md): This technical specification provides detailed technical information about OS MasterMap Water Network Layer. It is targeted at technical users and software developers. - [Product notes](https://docs.os.uk/os-downloads/resources/product-resources/end-of-life-product-documentation/os-mastermap-water-network-layer/os-mastermap-water-network-layer-technical-specification/product-notes.md) - [January 2022 product notes](https://docs.os.uk/os-downloads/resources/product-resources/end-of-life-product-documentation/os-mastermap-water-network-layer/os-mastermap-water-network-layer-technical-specification/product-notes/january-2022-product-notes.md) - [Product structure](https://docs.os.uk/os-downloads/resources/product-resources/end-of-life-product-documentation/os-mastermap-water-network-layer/os-mastermap-water-network-layer-technical-specification/product-structure.md) - [Feature types](https://docs.os.uk/os-downloads/resources/product-resources/end-of-life-product-documentation/os-mastermap-water-network-layer/os-mastermap-water-network-layer-technical-specification/feature-types.md) - [WatercourseLink](https://docs.os.uk/os-downloads/resources/product-resources/end-of-life-product-documentation/os-mastermap-water-network-layer/os-mastermap-water-network-layer-technical-specification/feature-types/watercourselink.md) - [HydroNode](https://docs.os.uk/os-downloads/resources/product-resources/end-of-life-product-documentation/os-mastermap-water-network-layer/os-mastermap-water-network-layer-technical-specification/feature-types/hydronode.md) - [Structured data types](https://docs.os.uk/os-downloads/resources/product-resources/end-of-life-product-documentation/os-mastermap-water-network-layer/os-mastermap-water-network-layer-technical-specification/structured-data-types.md) - [LinearReference](https://docs.os.uk/os-downloads/resources/product-resources/end-of-life-product-documentation/os-mastermap-water-network-layer/os-mastermap-water-network-layer-technical-specification/structured-data-types/linearreference.md) - [PointReference](https://docs.os.uk/os-downloads/resources/product-resources/end-of-life-product-documentation/os-mastermap-water-network-layer/os-mastermap-water-network-layer-technical-specification/structured-data-types/pointreference.md) - [Code lists and enumerations](https://docs.os.uk/os-downloads/resources/product-resources/end-of-life-product-documentation/os-mastermap-water-network-layer/os-mastermap-water-network-layer-technical-specification/code-lists-and-enumerations.md) - [LinkDirectionValue](https://docs.os.uk/os-downloads/resources/product-resources/end-of-life-product-documentation/os-mastermap-water-network-layer/os-mastermap-water-network-layer-technical-specification/code-lists-and-enumerations/linkdirectionvalue.md) - [WatercourseFormValue](https://docs.os.uk/os-downloads/resources/product-resources/end-of-life-product-documentation/os-mastermap-water-network-layer/os-mastermap-water-network-layer-technical-specification/code-lists-and-enumerations/watercourseformvalue.md) - [WatercourseProvenanceValue](https://docs.os.uk/os-downloads/resources/product-resources/end-of-life-product-documentation/os-mastermap-water-network-layer/os-mastermap-water-network-layer-technical-specification/code-lists-and-enumerations/watercourseprovenancevalue.md) - [LevelOfDetailValue](https://docs.os.uk/os-downloads/resources/product-resources/end-of-life-product-documentation/os-mastermap-water-network-layer/os-mastermap-water-network-layer-technical-specification/code-lists-and-enumerations/levelofdetailvalue.md) - [ReasonForChangeValue](https://docs.os.uk/os-downloads/resources/product-resources/end-of-life-product-documentation/os-mastermap-water-network-layer/os-mastermap-water-network-layer-technical-specification/code-lists-and-enumerations/reasonforchangevalue.md) - [VerticalPositionValue](https://docs.os.uk/os-downloads/resources/product-resources/end-of-life-product-documentation/os-mastermap-water-network-layer/os-mastermap-water-network-layer-technical-specification/code-lists-and-enumerations/verticalpositionvalue.md) - [HydroNodeCategoryValue](https://docs.os.uk/os-downloads/resources/product-resources/end-of-life-product-documentation/os-mastermap-water-network-layer/os-mastermap-water-network-layer-technical-specification/code-lists-and-enumerations/hydronodecategoryvalue.md) - [WatercourseTypeValue](https://docs.os.uk/os-downloads/resources/product-resources/end-of-life-product-documentation/os-mastermap-water-network-layer/os-mastermap-water-network-layer-technical-specification/code-lists-and-enumerations/watercoursetypevalue.md) - [Feature types for future release](https://docs.os.uk/os-downloads/resources/product-resources/end-of-life-product-documentation/os-mastermap-water-network-layer/os-mastermap-water-network-layer-technical-specification/feature-types-for-future-release.md) - [WatercourseSeparatedCrossing](https://docs.os.uk/os-downloads/resources/product-resources/end-of-life-product-documentation/os-mastermap-water-network-layer/os-mastermap-water-network-layer-technical-specification/feature-types-for-future-release/watercourseseparatedcrossing.md) - [WatercourseLinkSet](https://docs.os.uk/os-downloads/resources/product-resources/end-of-life-product-documentation/os-mastermap-water-network-layer/os-mastermap-water-network-layer-technical-specification/feature-types-for-future-release/watercourselinkset.md) - [WatercourseInteraction](https://docs.os.uk/os-downloads/resources/product-resources/end-of-life-product-documentation/os-mastermap-water-network-layer/os-mastermap-water-network-layer-technical-specification/feature-types-for-future-release/watercourseinteraction.md) - [GML overview](https://docs.os.uk/os-downloads/resources/product-resources/end-of-life-product-documentation/os-mastermap-water-network-layer/os-mastermap-water-network-layer-technical-specification/gml-overview.md) - [GeoPackage overview](https://docs.os.uk/os-downloads/resources/product-resources/end-of-life-product-documentation/os-mastermap-water-network-layer/os-mastermap-water-network-layer-technical-specification/geopackage-overview.md) - [Attribute naming differences](https://docs.os.uk/os-downloads/resources/product-resources/end-of-life-product-documentation/os-mastermap-water-network-layer/os-mastermap-water-network-layer-technical-specification/geopackage-overview/watercourselink.md): Attribute naming differences between GML and GeoPackage formats for the two feature types in the product. - [Vector tiles overview](https://docs.os.uk/os-downloads/resources/product-resources/end-of-life-product-documentation/os-mastermap-water-network-layer/os-mastermap-water-network-layer-technical-specification/vector-tiles-overview.md) - [Attribute naming differences](https://docs.os.uk/os-downloads/resources/product-resources/end-of-life-product-documentation/os-mastermap-water-network-layer/os-mastermap-water-network-layer-technical-specification/vector-tiles-overview/attribute-naming-differences.md): Attribute naming differences between GML and vector tiles formats for the two feature types in the product. - [Data provenance](https://docs.os.uk/os-downloads/resources/product-resources/end-of-life-product-documentation/os-mastermap-water-network-layer/os-mastermap-water-network-layer-technical-specification/data-provenance.md) - [Additional resources](https://docs.os.uk/os-downloads/resources/product-resources/end-of-life-product-documentation/os-mastermap-water-network-layer/os-mastermap-water-network-layer-technical-specification/additional-resources.md) - [OS MasterMap Water Network Layer Downloads](https://docs.os.uk/os-downloads/resources/product-resources/end-of-life-product-documentation/os-mastermap-water-network-layer/os-mastermap-water-network-layer-downloads.md): This page provides downloadable files to support the product in use. - [OS MasterMap Water Network Layer Known Data Issues](https://docs.os.uk/os-downloads/resources/product-resources/end-of-life-product-documentation/os-mastermap-water-network-layer/os-mastermap-water-network-layer-known-data-issues.md): This page provides the details of known data issues present in the final release of the OS MasterMap Water Network Layer product. - [PSGA Product Summary](https://docs.os.uk/os-downloads/resources/product-resources/psga-product-summary.md): This page provides an overview of all the OS data products available to PSGA Members on an unlimited basis across the OS NGD, APIs and Download data products. - [PSGA Product Summary Table](https://docs.os.uk/os-downloads/resources/product-resources/psga-product-summary-table.md): This page provides a plain text overview of all the OS data products available to PSGA Members on an unlimited basis across the OS NGD, APIs and downloadable products. - [Site Resources](https://docs.os.uk/os-downloads/resources/site-resources.md): This section holds useful site information, including contact details, an accessibility statement, Terms and Conditions, the Open Identifiers Policy, and rules on the use of NSG and OS data. - [Contact Us](https://docs.os.uk/os-downloads/resources/site-resources/contact-us.md): Signposting on how to contact OS if you have feedback on any of the documentation for the Download data products. - [Accessibility](https://docs.os.uk/os-downloads/resources/site-resources/accessibility.md) - [Terms and Conditions](https://docs.os.uk/os-downloads/resources/site-resources/terms-and-conditions.md): The terms and conditions on which the OS Premium and OS OpenData Download data products are made available. - [Open Identifiers Policy](https://docs.os.uk/os-downloads/resources/site-resources/open-identifiers-policy.md): Information about and a link to our Open Identifiers Policy; this policy makes it easier for third parties to share information and link datasets. - [Use of NSG and OS Data](https://docs.os.uk/os-downloads/resources/site-resources/use-of-nsg-and-os-data.md): Briefing note on the use of the National Street Gazetteer (NSG) and OS data. --- # 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/resources.md?ask= ``` 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.