# Resources

- [Product Resources](/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](/os-downloads/resources/product-resources/product-refresh-dates.md): Update schedules for all of the OS Download data products.
- [Product Announcements](/os-downloads/resources/product-resources/product-announcements.md): A page detailing any newsworthy announcements for the OS Download data products.
- [Product Sample Data](/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](/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](/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](/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](/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](/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](/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](/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](/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](/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](/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](/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](/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](/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](/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](/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](/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](/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](/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](/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](/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](/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](/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](/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](/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](/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.
- [OS MasterMap Water Network Layer Overview](/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](/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](/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](/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](/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](/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](/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](/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](/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](/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](/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](/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](/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](/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](/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](/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](/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](/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](/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](/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](/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](/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](/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](/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](/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](/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](/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](/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](/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](/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](/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](/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](/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](/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](/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](/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](/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](/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](/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](/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](/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](/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.
- [Site Resources](/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](/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](/os-downloads/resources/site-resources/accessibility.md)
- [Terms and Conditions](/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](/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](/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.