# OS National Geographic Database

## osngd

- [OS NGD Documentation](https://docs.os.uk/osngd/readme-1.md): Welcome to OS NGD documentation! Here you can learn how to get started using OS NGD data via OS Select+Build and the OS NGD APIs.
- [Introduction to OS NGD](https://docs.os.uk/osngd/introduction-to-os-ngd/introduction-to-os-ngd.md): This section explains what the OS NGD is and who can access it, outlines the key benefits to customers, and details how to download sample data or visualise it online.
- [OS NGD Explained](https://docs.os.uk/osngd/introduction-to-os-ngd/os-ngd-explained.md): This page explains what the OS NGD is, how to access it and who can use it. Additional resources are provided with links to deeper technical content.
- [OS NGD Key Benefits to Customers](https://docs.os.uk/osngd/introduction-to-os-ngd/os-ngd-key-benefits-to-customers.md): This page lists the key benefits of the OS NGD to customers.
- [OS NGD Sample Data](https://docs.os.uk/osngd/introduction-to-os-ngd/os-ngd-sample-data.md): Download OS NGD sample data or visualise it online.
- [Getting Started Information](https://docs.os.uk/osngd/getting-started/getting-started-information.md): This section includes getting started guides to help you access, use and style OS NGD data. You'll also find FAQs, in-depth information on OS NGD design, and webinars, tutorials and case studies.
- [OS NGD Fundamentals](https://docs.os.uk/osngd/getting-started/os-ngd-fundamentals.md): OS NGD Fundamentals covers the core elements of OS NGD design, including data formats, coordinate reference systems used, data schema versioning, and data ordering and currency.
- [Terminology and access](https://docs.os.uk/osngd/getting-started/os-ngd-fundamentals/terminology-and-access.md)
- [File formats and naming](https://docs.os.uk/osngd/getting-started/os-ngd-fundamentals/file-formats-and-naming.md)
- [Data ordering and currency](https://docs.os.uk/osngd/getting-started/os-ngd-fundamentals/os-ngd-data-ordering-and-currency.md): Find out more about geographic filtering options, order update options, data currency information, and feature counts for certain collections.
- [COU supplies](https://docs.os.uk/osngd/getting-started/os-ngd-fundamentals/cou-supplies.md)
- [Data schema versioning](https://docs.os.uk/osngd/getting-started/os-ngd-fundamentals/data-schema-versioning.md)
- [Unique identifiers](https://docs.os.uk/osngd/getting-started/os-ngd-fundamentals/unique-identifiers.md)
- [Coordinate reference systems](https://docs.os.uk/osngd/getting-started/os-ngd-fundamentals/coordinate-reference-systems.md): Find out what coordinate reference systems are available for OS Select+Build and the OS NGD APIs.
- [Attribute information for feature types](https://docs.os.uk/osngd/getting-started/os-ngd-fundamentals/attribute-information-for-feature-types.md)
- [Downloading with OS Select+Build](https://docs.os.uk/osngd/getting-started/downloading-with-os-select+build.md): Discover how to download OS NGD data using our bespoke download service, OS Select+Build.
- [Getting started with recipes](https://docs.os.uk/osngd/getting-started/downloading-with-os-select+build/getting-started-with-recipes.md)
- [Managing OS Select+Build recipes](https://docs.os.uk/osngd/getting-started/downloading-with-os-select+build/getting-started-with-recipes/managing-os-select+build-recipes.md): Step-by-step instructions on how to create and manage your OS Select+Build recipes.
- [Editing OS Select+Build recipes](https://docs.os.uk/osngd/getting-started/downloading-with-os-select+build/getting-started-with-recipes/editing-os-select+build-recipes.md): Step-by-step instructions on how to edit OS Select+Build recipes.
- [Sharing OS Select+Build recipes](https://docs.os.uk/osngd/getting-started/downloading-with-os-select+build/getting-started-with-recipes/sharing-os-select+build-recipes.md): Step-by-step instructions on how to share your OS Select+Build recipes with other organisations.
- [Getting started with attribute filtering](https://docs.os.uk/osngd/getting-started/downloading-with-os-select+build/getting-started-with-recipes/getting-started-with-attribute-filtering.md): Step-by-step instructions on how to add attribute filters to recipes in your OS Select+Build Recipe Library.
- [Getting started with OS recommended recipes](https://docs.os.uk/osngd/getting-started/downloading-with-os-select+build/getting-started-with-os-recommended-recipes.md): Discover OS recommended recipe guides containing detailed step-by-step instructions outlining how you can create set recipes for OS NGD data using OS Select+Build.
- [Greenspace recipe guide](https://docs.os.uk/osngd/getting-started/downloading-with-os-select+build/getting-started-with-os-recommended-recipes/greenspace-recipe-guide.md): A guide with detailed step-by-step instructions outlining how you can create a greenspace recipe in OS Select+Build.
- [Identifying higher-risk buildings recipe guide](https://docs.os.uk/osngd/getting-started/downloading-with-os-select+build/getting-started-with-os-recommended-recipes/identifying-higher-risk-buildings-recipe-guide.md): A guide with detailed step-by-step instructions outlining how you can create a recipe in OS Select+Build to identify higher-risk buildings.
- [Safer routes to schools recipe guide](https://docs.os.uk/osngd/getting-started/downloading-with-os-select+build/getting-started-with-os-recommended-recipes/safer-routes-to-schools-recipe-guide.md): A guide with detailed step-by-step instructions outlining how you can create a safer routes to schools recipe in OS Select+Build.
- [Getting started with data packages](https://docs.os.uk/osngd/getting-started/downloading-with-os-select+build/getting-started-with-data-packages.md): Step-by-step instructions on how to create new data packages, find and download existing ones, and delete data packages.
- [Getting started with temporal filtering](https://docs.os.uk/osngd/getting-started/downloading-with-os-select+build/getting-started-with-data-packages/getting-started-with-temporal-filtering.md): This guide introduces the concept of temporal filtering in the OS NGD and gives instructions on how to add a temporal filter to a new data package.
- [Getting started with GeoPackage](https://docs.os.uk/osngd/getting-started/downloading-with-os-select+build/getting-started-with-geopackage.md)
- [ArcGIS Pro](https://docs.os.uk/osngd/getting-started/downloading-with-os-select+build/getting-started-with-geopackage/arcgis-pro.md): Accessing GeoPackage data via ArcGIS Pro
- [ArcMap](https://docs.os.uk/osngd/getting-started/downloading-with-os-select+build/getting-started-with-geopackage/arcmap.md): Accessing GeoPackage data via ArcMap
- [Cadcorp SIS](https://docs.os.uk/osngd/getting-started/downloading-with-os-select+build/getting-started-with-geopackage/cadcorp-sis.md): Accessing GeoPackage data via CadCorp
- [MapInfo Professional](https://docs.os.uk/osngd/getting-started/downloading-with-os-select+build/getting-started-with-geopackage/mapinfo-professional.md): Accessing GeoPackage data via MapInfo Professional
- [QGIS](https://docs.os.uk/osngd/getting-started/downloading-with-os-select+build/getting-started-with-geopackage/qgis.md): Accessing GeoPackage data via QGIS
- [FME](https://docs.os.uk/osngd/getting-started/downloading-with-os-select+build/getting-started-with-geopackage/fme.md): Reading GeoPackage data via FME
- [GDAL](https://docs.os.uk/osngd/getting-started/downloading-with-os-select+build/getting-started-with-geopackage/gdal.md): Using GDAL to load a GeoPackage into a database
- [Getting started with CSV](https://docs.os.uk/osngd/getting-started/downloading-with-os-select+build/getting-started-with-csv.md)
- [Loading CSV files](https://docs.os.uk/osngd/getting-started/downloading-with-os-select+build/getting-started-with-csv/loading-csv-files.md): Loading OS NGD CSV files into databases
- [Processing COUs](https://docs.os.uk/osngd/getting-started/downloading-with-os-select+build/getting-started-with-csv/processing-cous.md): Processing OS NGD COU files.
- [Accessing OS NGD APIs](https://docs.os.uk/osngd/getting-started/access-the-os-ngd-api.md): Learn how to access and use OS NGD API – Features and OS NGD API – Tiles.
- [Styling OS NGD Data](https://docs.os.uk/osngd/getting-started/styling-os-ngd-data.md): Resources for styling OS NGD data.
- [OS NGD Webinars, Tutorials and Case Studies](https://docs.os.uk/osngd/getting-started/os-ngd-talks-webinars-tutorial-videos-and-case-studies.md): Learn more about the OS NGD through our webinars and tutorials. Case studies demonstrate how customers across numerous sectors are already using and benefiting from OS NGD data.
- [FAQs](https://docs.os.uk/osngd/getting-started/faqs.md): Frequently asked questions on OS NGD data and access methods (OS Select+Build and OS NGD APIs).
- [OS NGD News](https://docs.os.uk/osngd/os-ngd-news/os-ngd-news.md): This section contains pages relating to new data enhancements and service updates released for the OS NGD, the change log, improvements, planned future data enhancements and recent announcements.
- [What's New?](https://docs.os.uk/osngd/os-ngd-news/whats-new.md): As we release new data enhancements and service improvements for the OS NGD, we will update this page to provide you with a high-level summary of what's launched.
- [Change Log](https://docs.os.uk/osngd/os-ngd-news/change-log.md)
- [OS NGD Improvements](https://docs.os.uk/osngd/os-ngd-news/os-ngd-improvements.md): A high-level summary of data improvements implemented for the OS NGD.
- [Future OS NGD Data Enhancements](https://docs.os.uk/osngd/os-ngd-news/future-os-ngd-data-enhancements.md): A high-level summary of upcoming data enhancements for the OS NGD.
- [Data and Service Status Information](https://docs.os.uk/osngd/data-and-service-status/data-and-service-status-information.md): This section contains pages relating to OS NGD live service disruption, planned maintenance, current data issues and resolved data issues.
- [Live Service Disruption and Maintenance](https://docs.os.uk/osngd/data-and-service-status/live-service-disruption-and-maintenance.md): This page will be updated to note downtime due to planned or emergency maintenance or shutdown periods. Unexpected interruptions to product availability, releases and updates will be displayed here.
- [Current Known Data Issues](https://docs.os.uk/osngd/data-and-service-status/current-known-data-issues.md)
- [Resolved Data Issues](https://docs.os.uk/osngd/data-and-service-status/resolved-data-issues.md)
- [Data Structure Information](https://docs.os.uk/osngd/data-structure/data-structure-information.md): This section gives an overview of the OS NGD data structure and details the data available for each OS NGD theme, collection and feature type.
- [OS NGD Address](https://docs.os.uk/osngd/data-structure/address.md)
- [GB Address](https://docs.os.uk/osngd/data-structure/address/gb-address.md)
- [Built Address](https://docs.os.uk/osngd/data-structure/address/gb-address/built-address.md)
- [Historic Address](https://docs.os.uk/osngd/data-structure/address/gb-address/historic-address.md)
- [Non-Addressable Object](https://docs.os.uk/osngd/data-structure/address/gb-address/non-addressable-object.md)
- [Pre-Build Address](https://docs.os.uk/osngd/data-structure/address/gb-address/pre-build-address.md)
- [Royal Mail Address](https://docs.os.uk/osngd/data-structure/address/gb-address/royal-mail-address.md)
- [Street Address](https://docs.os.uk/osngd/data-structure/address/gb-address/street-address.md)
- [Islands Address](https://docs.os.uk/osngd/data-structure/address/islands-address.md)
- [Built Address](https://docs.os.uk/osngd/data-structure/address/islands-address/built-address.md)
- [Historic Address](https://docs.os.uk/osngd/data-structure/address/islands-address/historic-address.md)
- [Non-Addressable Object](https://docs.os.uk/osngd/data-structure/address/islands-address/non-addressable-object.md)
- [Pre-Build Address](https://docs.os.uk/osngd/data-structure/address/islands-address/pre-build-address.md)
- [Royal Mail Address](https://docs.os.uk/osngd/data-structure/address/islands-address/royal-mail-address.md)
- [Street Address](https://docs.os.uk/osngd/data-structure/address/islands-address/street-address.md)
- [Related Components](https://docs.os.uk/osngd/data-structure/address/related-components.md)
- [Alternate Address](https://docs.os.uk/osngd/data-structure/address/related-components/alternate-address.md)
- [Postal Address](https://docs.os.uk/osngd/data-structure/address/related-components/postal-address.md)
- [Other Classification](https://docs.os.uk/osngd/data-structure/address/related-components/other-classification.md)
- [Related Entity](https://docs.os.uk/osngd/data-structure/address/related-components/related-entity.md)
- [GB Address Local Custodian Codes](https://docs.os.uk/osngd/data-structure/address/gb-address-local-custodian-codes.md): The following page details the current local custodian codes of all local custodians contributing to the OS GB Address Collection.
- [Islands Address Local Custodian Codes](https://docs.os.uk/osngd/data-structure/address/islands-address-local-custodian-codes.md): The following page details the current local custodian codes of all local custodians contributing to the OS Islands Address Collection.
- [OS NGD Administrative and Statistical Units](https://docs.os.uk/osngd/data-structure/administrative-and-statistical-units.md)
- [Boundaries](https://docs.os.uk/osngd/data-structure/administrative-and-statistical-units/boundaries.md)
- [Boundary High Water Mark](https://docs.os.uk/osngd/data-structure/administrative-and-statistical-units/boundaries/boundary-high-water-mark.md)
- [Ceremonial County](https://docs.os.uk/osngd/data-structure/administrative-and-statistical-units/boundaries/ceremonial-county.md)
- [Country](https://docs.os.uk/osngd/data-structure/administrative-and-statistical-units/boundaries/country.md)
- [Devolved Parliament Constituency](https://docs.os.uk/osngd/data-structure/administrative-and-statistical-units/boundaries/devolved-parliament-constituency.md)
- [Devolved Parliament Electoral Region](https://docs.os.uk/osngd/data-structure/administrative-and-statistical-units/boundaries/devolved-parliament-electoral-region.md)
- [Electoral Division](https://docs.os.uk/osngd/data-structure/administrative-and-statistical-units/boundaries/electoral-division.md)
- [GLA Assembly Constituency](https://docs.os.uk/osngd/data-structure/administrative-and-statistical-units/boundaries/gla-assembly-constituency.md)
- [Historic County](https://docs.os.uk/osngd/data-structure/administrative-and-statistical-units/boundaries/historic-county.md)
- [Historic European Region](https://docs.os.uk/osngd/data-structure/administrative-and-statistical-units/boundaries/historic-european-region.md)
- [Lower Tier Local Authority](https://docs.os.uk/osngd/data-structure/administrative-and-statistical-units/boundaries/lower-tier-local-authority.md)
- [Parish Or Community](https://docs.os.uk/osngd/data-structure/administrative-and-statistical-units/boundaries/parish-or-community.md)
- [Polling District](https://docs.os.uk/osngd/data-structure/administrative-and-statistical-units/boundaries/polling-district.md)
- [Region](https://docs.os.uk/osngd/data-structure/administrative-and-statistical-units/boundaries/region.md)
- [Regional Authority](https://docs.os.uk/osngd/data-structure/administrative-and-statistical-units/boundaries/regional-authority.md)
- [Upper Tier Local Authority](https://docs.os.uk/osngd/data-structure/administrative-and-statistical-units/boundaries/upper-tier-local-authority.md)
- [Ward](https://docs.os.uk/osngd/data-structure/administrative-and-statistical-units/boundaries/ward.md)
- [Westminster Constituency](https://docs.os.uk/osngd/data-structure/administrative-and-statistical-units/boundaries/westminster-constituency.md)
- [Functional Areas](https://docs.os.uk/osngd/data-structure/administrative-and-statistical-units/functional-areas.md)
- [Retail Area Aggregated](https://docs.os.uk/osngd/data-structure/administrative-and-statistical-units/functional-areas/retail-area-aggregated.md)
- [Retail Area Major](https://docs.os.uk/osngd/data-structure/administrative-and-statistical-units/functional-areas/retail-area-major.md)
- [Retail Area Minor](https://docs.os.uk/osngd/data-structure/administrative-and-statistical-units/functional-areas/retail-area-minor.md)
- [GB Postcodes](https://docs.os.uk/osngd/data-structure/administrative-and-statistical-units/gb-postcodes.md)
- [Postcode Unit Area](https://docs.os.uk/osngd/data-structure/administrative-and-statistical-units/gb-postcodes/postcode-unit-area.md)
- [Postcode Unit Point](https://docs.os.uk/osngd/data-structure/administrative-and-statistical-units/gb-postcodes/postcode-unit-point.md)
- [NI Postcodes](https://docs.os.uk/osngd/data-structure/administrative-and-statistical-units/ni-postcodes.md)
- [Postcode Unit Point](https://docs.os.uk/osngd/data-structure/administrative-and-statistical-units/ni-postcodes/postcode-unit-point.md)
- [OS NGD Buildings](https://docs.os.uk/osngd/data-structure/buildings.md)
- [Building Features](https://docs.os.uk/osngd/data-structure/buildings/building-features.md)
- [Building](https://docs.os.uk/osngd/data-structure/buildings/building-features/building.md)
- [Building Access Location](https://docs.os.uk/osngd/data-structure/buildings/building-features/building-access-location.md)
- [Building Line](https://docs.os.uk/osngd/data-structure/buildings/building-features/building-line.md)
- [Building Part](https://docs.os.uk/osngd/data-structure/buildings/building-features/building-part.md)
- [OS NGD Geographical Names](https://docs.os.uk/osngd/data-structure/geographical-names.md)
- [Named Features](https://docs.os.uk/osngd/data-structure/geographical-names/named-features.md)
- [Crowd Sourced Name Point](https://docs.os.uk/osngd/data-structure/geographical-names/named-features/crowd-sourced-name-point.md)
- [Named Area](https://docs.os.uk/osngd/data-structure/geographical-names/named-features/named-area.md)
- [Named Point](https://docs.os.uk/osngd/data-structure/geographical-names/named-features/named-point.md)
- [Named Road Junction](https://docs.os.uk/osngd/data-structure/geographical-names/named-features/named-road-junction.md)
- [OS NGD Land](https://docs.os.uk/osngd/data-structure/land.md)
- [Land Features](https://docs.os.uk/osngd/data-structure/land/land-features.md)
- [Land](https://docs.os.uk/osngd/data-structure/land/land-features/land.md)
- [Land Point](https://docs.os.uk/osngd/data-structure/land/land-features/land-point.md)
- [Landform](https://docs.os.uk/osngd/data-structure/land/land-features/landform.md)
- [Landform Line](https://docs.os.uk/osngd/data-structure/land/land-features/landform-line.md)
- [Landform Point](https://docs.os.uk/osngd/data-structure/land/land-features/landform-point.md)
- [OS NGD Land Use](https://docs.os.uk/osngd/data-structure/land-use.md)
- [Land Use Features](https://docs.os.uk/osngd/data-structure/land-use/land-use-features.md)
- [Site](https://docs.os.uk/osngd/data-structure/land-use/land-use-features/site.md)
- [Site Access Location](https://docs.os.uk/osngd/data-structure/land-use/land-use-features/site-access-location.md)
- [Site Routing Point](https://docs.os.uk/osngd/data-structure/land-use/land-use-features/site-routing-point.md)
- [OS NGD Structures](https://docs.os.uk/osngd/data-structure/structures.md)
- [Structure Features](https://docs.os.uk/osngd/data-structure/structures/structure-features.md)
- [Compound Structure](https://docs.os.uk/osngd/data-structure/structures/structure-features/compound-structure.md)
- [Field Boundary](https://docs.os.uk/osngd/data-structure/structures/structure-features/field-boundary.md)
- [Structure](https://docs.os.uk/osngd/data-structure/structures/structure-features/structure.md)
- [Structure Line](https://docs.os.uk/osngd/data-structure/structures/structure-features/structure-line.md)
- [Structure Point](https://docs.os.uk/osngd/data-structure/structures/structure-features/structure-point.md)
- [OS NGD Transport](https://docs.os.uk/osngd/data-structure/transport.md)
- [Routing and Asset Management Information (RAMI)](https://docs.os.uk/osngd/data-structure/transport/rami.md)
- [Average And Indicative Speed](https://docs.os.uk/osngd/data-structure/transport/rami/average-and-indicative-speed.md)
- [Highway Dedication](https://docs.os.uk/osngd/data-structure/transport/rami/highway-dedication.md)
- [Maintenance Area](https://docs.os.uk/osngd/data-structure/transport/rami/maintenance-area.md)
- [Maintenance Line](https://docs.os.uk/osngd/data-structure/transport/rami/maintenance-line.md)
- [Maintenance Point](https://docs.os.uk/osngd/data-structure/transport/rami/maintenance-point.md)
- [Reinstatement Area](https://docs.os.uk/osngd/data-structure/transport/rami/reinstatement-area.md)
- [Reinstatement Line](https://docs.os.uk/osngd/data-structure/transport/rami/reinstatement-line.md)
- [Reinstatement Point](https://docs.os.uk/osngd/data-structure/transport/rami/reinstatement-point.md)
- [Restriction](https://docs.os.uk/osngd/data-structure/transport/rami/restriction.md)
- [Routing Hazard](https://docs.os.uk/osngd/data-structure/transport/rami/routing-hazard.md)
- [Routing Structure](https://docs.os.uk/osngd/data-structure/transport/rami/routingstructure.md)
- [Special Designation Area](https://docs.os.uk/osngd/data-structure/transport/rami/special-designation-area.md)
- [Special Designation Line](https://docs.os.uk/osngd/data-structure/transport/rami/special-designation-line.md)
- [Special Designation Point](https://docs.os.uk/osngd/data-structure/transport/rami/special-designation-point.md)
- [Transport Features](https://docs.os.uk/osngd/data-structure/transport/transport-features.md)
- [Cartographic Rail Detail](https://docs.os.uk/osngd/data-structure/transport/transport-features/cartographic-rail-detail.md)
- [Rail](https://docs.os.uk/osngd/data-structure/transport/transport-features/rail.md)
- [Road Line](https://docs.os.uk/osngd/data-structure/transport/transport-features/road-line.md)
- [Road Track Or Path](https://docs.os.uk/osngd/data-structure/transport/transport-features/road-track-or-path.md)
- [Street Light](https://docs.os.uk/osngd/data-structure/transport/transport-features/street-light.md)
- [Transport Network](https://docs.os.uk/osngd/data-structure/transport/transport-network.md)
- [Bus Lane](https://docs.os.uk/osngd/data-structure/transport/transport-network/bus-lane.md)
- [Connecting Link](https://docs.os.uk/osngd/data-structure/transport/transport-network/connecting-link.md)
- [Connecting Node](https://docs.os.uk/osngd/data-structure/transport/transport-network/connecting-node.md)
- [Cycle Lane](https://docs.os.uk/osngd/data-structure/transport/transport-network/cycle-lane.md)
- [Ferry Link](https://docs.os.uk/osngd/data-structure/transport/transport-network/ferry-link.md)
- [Ferry Node](https://docs.os.uk/osngd/data-structure/transport/transport-network/ferry-node.md)
- [Ferry Terminal](https://docs.os.uk/osngd/data-structure/transport/transport-network/ferry-terminal.md)
- [Path](https://docs.os.uk/osngd/data-structure/transport/transport-network/path.md)
- [Path Link](https://docs.os.uk/osngd/data-structure/transport/transport-network/path-link.md)
- [Path Node](https://docs.os.uk/osngd/data-structure/transport/transport-network/path-node.md)
- [Pavement Link](https://docs.os.uk/osngd/data-structure/transport/transport-network/pavement-link.md)
- [Railway Link](https://docs.os.uk/osngd/data-structure/transport/transport-network/railway-link.md)
- [Railway Link Set](https://docs.os.uk/osngd/data-structure/transport/transport-network/railway-link-set.md)
- [Railway Node](https://docs.os.uk/osngd/data-structure/transport/transport-network/railway-node.md)
- [Road](https://docs.os.uk/osngd/data-structure/transport/transport-network/road.md)
- [Road Junction](https://docs.os.uk/osngd/data-structure/transport/transport-network/road-junction.md)
- [Road Link](https://docs.os.uk/osngd/data-structure/transport/transport-network/road-link.md)
- [Road Node](https://docs.os.uk/osngd/data-structure/transport/transport-network/road-node.md)
- [Street](https://docs.os.uk/osngd/data-structure/transport/transport-network/street.md)
- [Tram On Road](https://docs.os.uk/osngd/data-structure/transport/transport-network/tram-on-road.md)
- [OS NGD Water](https://docs.os.uk/osngd/data-structure/water.md)
- [Water Features](https://docs.os.uk/osngd/data-structure/water/water-features.md)
- [Inter Tidal Line](https://docs.os.uk/osngd/data-structure/water/water-features/inter-tidal-line.md)
- [River Basin District Catchment](https://docs.os.uk/osngd/data-structure/water/water-features/river-basin-district-catchment.md)
- [Tidal Boundary](https://docs.os.uk/osngd/data-structure/water/water-features/tidal-boundary.md)
- [Tidal Boundary Continuous High](https://docs.os.uk/osngd/data-structure/water/water-features/tidal-boundary-continuous-high.md)
- [Tidal Boundary Continuous Low](https://docs.os.uk/osngd/data-structure/water/water-features/tidal-boundary-continuous-low.md)
- [Water](https://docs.os.uk/osngd/data-structure/water/water-features/water.md)
- [Water Point](https://docs.os.uk/osngd/data-structure/water/water-features/water-point.md)
- [Waterbody Catchment](https://docs.os.uk/osngd/data-structure/water/water-features/waterbody-catchment.md)
- [Water Network](https://docs.os.uk/osngd/data-structure/water/water-network.md)
- [Water Link](https://docs.os.uk/osngd/data-structure/water/water-network/water-link.md)
- [Water Link Set](https://docs.os.uk/osngd/data-structure/water/water-network/water-link-set.md)
- [Water Node](https://docs.os.uk/osngd/data-structure/water/water-network/water-node.md)
- [Code Lists Overview](https://docs.os.uk/osngd/code-lists/code-lists-overview.md): This section contains all of the code lists for the OS NGD.
- [accesstypevalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/accesstypevalue.md)
- [accesslevelvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/accesslevelvalue.md)
- [accessmodevalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/accessmodevalue.md)
- [accessobstructionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/accessobstructionvalue.md)
- [accesspurposevalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/accesspurposevalue.md)
- [addressbasepostalvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/addressbasepostalcode.md)
- [addressclassificationcodevalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/addressclassificationcodevalue.md)
- [addressclassificationdescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/addressclassificationdescriptionvalue.md)
- [addressclassificationsourcevalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/addressclassificationsourcevalue.md)
- [addressdescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/addressdescriptionvalue.md)
- [addressprimaryclassificationdescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/addressprimaryclassificationdescriptionvalue.md)
- [addressquaternaryclassificationdescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/addressquaternaryclassificationdescriptionvalue.md)
- [addresssecondaryclassificationdescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/addresssecondaryclassificationdescriptionvalue.md)
- [addressstatusvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/addressstatuscode.md)
- [addressstreettypevalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/addressstreettypevalue.md)
- [addresstertiaryclassificationdescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/addresstertiaryclassificationdescriptionvalue.md)
- [associatedstreetdatadescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/associatedstreetdatadescriptionvalue.md)
- [averageandindicativespeeddescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/averageandindicativespeeddescriptionvalue.md)
- [basementpresencesourcevalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/basementpresencesourcevalue.md)
- [boundaryhighwatermarkdescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/boundaryhighwatermarkdescriptionvalue.md)
- [boundarytypevalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/boundarytypevalue.md)
- [buildingaccesslocationdescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/buildingaccesslocationdescriptionvalue.md)
- [buildingageperiodvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/buildingageperiodvalue.md)
- [buildingagesourcevalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/buildingagesourcevalue.md)
- [buildingconnectivitytypevalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/buildingconnectivitytypevalue.md)
- [buildingdescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/buildingdescriptionvalue.md)
- [buildinglinedescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/buildinglinedescriptionvalue.md)
- [buildingpartdescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/buildingpartdescriptionvalue.md)
- [buildingpartlandcovertieravalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/buildingpartlandcovertieravalue.md)
- [buildingpartlandcovertierbvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/buildingpartlandcovertierbvalue.md)
- [buildingusevalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/buildingusevalue.md)
- [buildstatusvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/buildstatuscode.md)
- [builtstructureheightconfidencevalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/builtstructureheightconfidencevalue.md)
- [buslanedescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/buslanedescriptionvalue.md)
- [capturemethodvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/capturemethodvalue.md)
- [capturespecificationvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/capturespecificationvalue.md)
- [ceremonialcountydescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/ceremonialcountydescriptionvalue.md)
- [changetypevalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/changetypevalue.md)
- [classificationcorrelationvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/classificationcorrelationvalue.md)
- [compoundstructuredescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/compoundstructuredescriptionvalue.md)
- [connectinglinkdescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/connectinglinkdescriptionvalue.md)
- [connectingnodedescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/connectingnodedescriptionvalue.md)
- [constructionmaterialsourcevalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/constructionmaterialsourcevalue.md)
- [constructionmaterialvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/constructionmaterialvalue.md)
- [countryvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/countryvalue.md)
- [countrydescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/countrydescriptionvalue.md)
- [crowdsourcednamedescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/crowdsourcednamedescriptionvalue.md)
- [crowdsourcednamematchtypevalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/crowdsourcednamematchtypevalue.md)
- [cyclefacilityvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/cyclefacilityvalue.md)
- [cyclelanedescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/cyclelanedescriptionvalue.md)
- [dataentitycatalogue](https://docs.os.uk/osngd/code-lists/code-lists-overview/dataentitycatalogue.md)
- [dataentitycataloguecompoundstructurevalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/dataentitycataloguecompoundstructurevalue.md)
- [dataentitycataloguepostcodevalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/dataentitycataloguepostcodevalue.md)
- [dataentitycatalogueretailaareavalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/dataentitycatalogueretailaareavalue.md)
- [dedicationvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/dedicationvalue.md)
- [densityvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/densityvalue.md)
- [devolvedparliamentconstituencydescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/devolvedparliamentconstituencydescriptionvalue.md)
- [devolvedparliamentelectoralregiondescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/devolvedparliamentelectoralregiondescriptionvalue.md)
- [electoraldivisiondescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/electoraldivisiondescriptionvalue.md)
- [extentoflinkvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/extentoflinkvalue.md)
- [ferrylinkdescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/ferrylinkdescriptionvalue.md)
- [ferrynodedescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/ferrynodedescriptionvalue.md)
- [ferryterminaldescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/ferryterminaldescriptionvalue.md)
- [fieldboundarydescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/fieldboundarydescriptionvalue.md)
- [formofroadnodevalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/formofroadnodevalue.md)
- [formofwaytypevalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/formofwaytypevalue.md)
- [gaugevalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/gaugevalue.md)
- [geometryallocationmethodvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/geometryallocationmethodvalue.md)
- [glaassemblyconstituencydescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/glaassemblyconstituencydescriptionvalue.md)
- [gssrolevalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/gssrolevalue.md)
- [hazardtypevalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/hazardtypevalue.md)
- [heightingmethodvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/heightingmethodvalue.md)
- [highwaydedicationnetworkfeaturetypevalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/highwaydedicationnetworkfeaturetypevalue.md)
- [historiccountydescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/historiccountydescriptionvalue.md)
- [historiceuropeanregiondescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/historiceuropeanregiondescriptionvalue.md)
- [illuminationvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/illuminationvalue.md)
- [inputaddressaccuracyvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/inputaddressaccuracyvalue.md)
- [intertidallinedescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/intertidallinedescriptionvalue.md)
- [junctiontypedescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/junctiontypedescriptionvalue.md)
- [landdescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/landdescriptionvalue.md)
- [landformdescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/landformdescriptionvalue.md)
- [landformlinedescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/landformlinedescriptionvalue.md)
- [landformpointdescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/landformpointdescriptionvalue.md)
- [landcovertieravalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/landcovertieravalue.md)
- [landcovertierbvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/landcovertierbvalue.md)
- [landformvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/landformvalue.md)
- [landpointdescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/landpointdescriptionvalue.md)
- [landusetieravalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/landusetieravalue.md)
- [landusetierbvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/landusetierbvalue.md)
- [languagevalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/languagevalue.md)
- [linkdirectionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/linkdirectionvalue.md)
- [linkreferenceconfidencevalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/linkreferenceconfidencevalue.md)
- [lowertierlocalauthoritydescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/lowertierlocalauthoritydescriptionvalue.md)
- [maintenancevalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/maintenancevalue.md)
- [matchedaddressfeaturetypevalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/matchedaddressfeaturetypevalue.md)
- [matchedfeaturetypengdvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/matchedfeaturetypengdvalue.md)
- [matchedthemengdvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/matchedthemengdvalue.md)
- [matcheduprnvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/matcheduprnvalue.md)
- [matchingorganisationvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/matchingorganisationvalue.md)
- [matchmethodvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/matchmethodvalue.md)
- [matchstatusvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/matchstatusvalue.md)
- [namedareaextentdefinitionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/namedareaextentdefinitionvalue.md)
- [nameddatevalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/nameddatevalue.md)
- [nameddayvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/nameddayvalue.md)
- [namedescriptiongroupvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/namedescriptiongroupvalue.md)
- [namedescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/namedescriptionvalue.md)
- [namedperiodvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/namedperiodvalue.md)
- [namedroadjunctiondescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/namedroadjunctiondescriptionvalue.md)
- [namedtimevalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/namedtimevalue.md)
- [networkfeaturetypevalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/networkfeaturetypevalue.md)
- [networknodefeaturetypevalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/networknodefeaturetypevalue.md)
- [networkoverunderbridgevalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/networkoverunderbridgevalue.md)
- [operationalstatevalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/operationalstatevalue.md)
- [operationalstatusvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/operationalstatusvalue.md)
- [parentboundarydescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/parentboundarydescriptionvalue.md)
- [parentfeaturetypevalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/parentfeaturetypevalue.md)
- [parishorcommunitydescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/parishorcommunitydescriptionvalue.md)
- [pathdescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/pathdescriptionvalue.md)
- [pathnodedescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/pathnodedescriptionvalue.md)
- [physicallevelvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/physicallevelvalue.md)
- [physicalstatevalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/physicalstatevalue.md)
- [physicallevelvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/physicallevelvalue-1.md)
- [pollingdistrictdescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/pollingdistrictdescriptionvalue.md)
- [positionalaccuracyvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/positionalaccuracyvalue.md)
- [postcodetypevalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/postcodetypevalue.md)
- [postcodeunitareadescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/postcodeunitareadescriptionvalue.md)
- [postcodeunitpointdescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/postcodeunitpointdescriptionvalue.md)
- [presencevalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/presencevalue.md)
- [raildescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/raildescriptionvalue.md)
- [raildetaildescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/raildetaildescriptionvalue.md)
- [raillandcovertieravalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/raillandcovertieravalue.md)
- [raillandcovertierbvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/raillandcovertierbvalue.md)
- [railwaylinkdescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/railwaylinkdescriptionvalue.md)
- [railwaylinksetdescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/railwaylinksetdescriptionvalue.md)
- [railwaynodedescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/railwaynodedescriptionvalue.md)
- [railwayusevalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/railwayusevalue.md)
- [regionalauthoritydescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/regionalauthoritydescriptionvalue.md)
- [regiondescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/regiondescriptionvalue.md)
- [reinstatementtypevalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/reinstatementtypevalue.md)
- [relationshiptypevalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/relationshiptypevalue.md)
- [restrictiontypedescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/restrictiontypedescriptionvalue.md)
- [restrictionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/restrictionvalue.md)
- [retailareaaggregateddescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/retailareaaggregateddescriptionvalue.md)
- [retailareamajordescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/retailareamajordescriptionvalue.md)
- [retailareaminordescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/retailareaminordescriptionvalue.md)
- [retailhierarchyvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/retailhierarchyvalue.md)
- [retailsettingvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/retailsettingvalue.md)
- [riverbasindistrictcatchmentdescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/riverbasindistrictcatchmentdescriptionvalue.md)
- [rmtolamatchtypevalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/rmtolamatchtypevalue.md)
- [roadclassificationvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/roadclassificationvalue.md)
- [roaddescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/roaddescriptionvalue.md)
- [roadfunctionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/roadfunctionvalue.md)
- [roadlinedescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/roadlinedescriptionvalue.md)
- [roadnodedescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/roadnodedescriptionvalue.md)
- [roadstructurevalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/roadstructurevalue.md)
- [roadtrackorpathdescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/roadtrackorpathdescriptionvalue.md)
- [roadtrackorpathlandcovertieravalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/roadtrackorpathlandcovertieravalue.md)
- [roadtrackorpathlandcovertierbvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/roadtrackorpathlandcovertierbvalue.md)
- [roadwidthconfidencelevelvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/roadwidthconfidencelevelvalue.md)
- [roofconfidenceindicatorvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/roofconfidenceindicatorvalue.md)
- [roofmaterialvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/roofmaterialvalue.md)
- [roofshapevalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/roofshapevalue.md)
- [royalmailaddressdescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/royalmailaddressdescriptionvalue.md)
- [pavementdescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/pavementdescriptionvalue.md)
- [sideoflinkvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/sideoflinkvalue.md)
- [sideofroadvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/sideofroadvalue.md)
- [siteaccesslocationdescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/siteaccesslocationdescriptionvalue.md)
- [sitedescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/sitedescriptionvalue.md)
- [siteextentdefinitionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/siteextentdefinitionvalue.md)
- [siteroutingpointdescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/siteroutingpointdescriptionvalue.md)
- [sourceofmeasurevalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/sourceofmeasurevalue.md)
- [specialdesignationtypevalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/specialdesignationtypevalue.md)
- [stakeholdervalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/stakeholdervalue.md)
- [statusvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/statusvalue.md)
- [streetclassificationvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/streetclassificationvalue.md)
- [streetdescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/streetdescriptionvalue.md)
- [streetgeometrysourcevalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/streetgeometrysourcevalue.md)
- [streetlightdescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/streetlightdescriptionvalue.md)
- [streetstatevalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/streetstatecode.md)
- [streetsurfacevalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/streetsurfacecode.md)
- [streettypevalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/streettypevalue.md)
- [structuredescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/structuredescriptionvalue.md)
- [structurelandcovertieravalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/structurelandcovertieravalue.md)
- [structurelandcovertierbvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/structurelandcovertierbvalue.md)
- [structurelinedescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/structurelinedescriptionvalue.md)
- [structurepointdescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/structurepointdescriptionvalue.md)
- [structuretypevalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/structuretypevalue.md)
- [structurevalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/structurevalue.md)
- [surfacetypevalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/surfacetypevalue.md)
- [themevalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/themevalue.md)
- [tidalboundarydescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/tidalboundarydescriptionvalue.md)
- [tidalboundarycontinuoushighdescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/tidalboundarycontinuoushighdescriptionvalue.md)
- [tidalboundarycontinuouslowdescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/tidalboundarycontinuouslowdescriptionvalue.md)
- [trackrepresentationvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/trackrepresentationvalue.md)
- [tramdescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/tramdescriptionvalue.md)
- [transportfeaturetypevalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/transportfeaturetypevalue.md)
- [uppertierlocalauthoritydescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/uppertierlocalauthoritydescriptionvalue.md)
- [usrnmatchindicatorvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/usrnmatchindicatorcode.md)
- [vehiclequalifiervalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/vehiclequalifiervalue.md)
- [warddescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/warddescriptionvalue.md)
- [waterbodycatchmentdescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/waterbodycatchmentdescriptionvalue.md)
- [waterbodycategoryvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/waterbodycategoryvalue.md)
- [waterdescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/waterdescriptionvalue.md)
- [waterlandcovertieravalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/waterlandcovertieravalue.md)
- [waterlandcovertierbvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/waterlandcovertierbvalue.md)
- [waterlinkdescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/waterlinkdescriptionvalue.md)
- [waterlinkflowdirectionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/waterlinkflowdirectionvalue.md)
- [waterlinkgeometrysourcevalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/waterlinkgeometrysourcevalue.md)
- [waterlinklevelofdetailvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/waterlinklevelofdetailvalue.md)
- [waterlinkpermanencevalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/waterlinkpermanencevalue.md)
- [waterlinkphysicalcontainmentvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/waterlinkphysicalcontainmentvalue.md)
- [waterlinkprimacyvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/waterlinkprimacyvalue.md)
- [waterlinksetdescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/waterlinksetdescriptionvalue.md)
- [waterlinkwatertypevalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/waterlinkwatertypevalue.md)
- [waterlinkwidthderivationmethodvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/waterlinkwidthderivationmethodvalue.md)
- [watermarkvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/watermarkvalue.md)
- [waternodedescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/waternodedescriptionvalue.md)
- [waterpointdescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/waterpointdescriptionvalue.md)
- [watertypevalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/watertypevalue.md)
- [westminsterconstituencydescriptionvalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/westminsterconstituencydescriptionvalue.md)
- [yesnovalue](https://docs.os.uk/osngd/code-lists/code-lists-overview/yesnovalue.md)
- [OS NGD Buildings](https://docs.os.uk/osngd/using-os-ngd-data/os-ngd-buildings.md)
- [Building Feature Type](https://docs.os.uk/osngd/using-os-ngd-data/os-ngd-buildings/building-feature-type.md)
- [How Building data is created](https://docs.os.uk/osngd/using-os-ngd-data/os-ngd-buildings/how-building-data-is-created.md)
- [Building attribution](https://docs.os.uk/osngd/using-os-ngd-data/os-ngd-buildings/building-attribution.md)
- [Known limitations](https://docs.os.uk/osngd/using-os-ngd-data/os-ngd-buildings/known-limitations.md)
- [Summary](https://docs.os.uk/osngd/using-os-ngd-data/os-ngd-buildings/summary.md)
- [OS NGD Structures](https://docs.os.uk/osngd/using-os-ngd-data/os-ngd-structures.md)
- [Field Boundary](https://docs.os.uk/osngd/using-os-ngd-data/os-ngd-structures/field-boundary.md): Advice on how you can make the most of the data provided by the Field Boundary Feature Type.
- [Field Boundary Feature Type](https://docs.os.uk/osngd/using-os-ngd-data/os-ngd-structures/field-boundary/field-boundary-feature-type.md)
- [How Field Boundary data is created](https://docs.os.uk/osngd/using-os-ngd-data/os-ngd-structures/field-boundary/how-field-boundary-data-is-created.md)
- [Field Boundary attribution](https://docs.os.uk/osngd/using-os-ngd-data/os-ngd-structures/field-boundary/field-boundary-attribution.md)
- [Known limitations](https://docs.os.uk/osngd/using-os-ngd-data/os-ngd-structures/field-boundary/known-limitations.md)
- [Summary](https://docs.os.uk/osngd/using-os-ngd-data/os-ngd-structures/field-boundary/summary.md)
- [OS NGD Transport](https://docs.os.uk/osngd/using-os-ngd-data/os-ngd-transport.md)
- [Bus lanes](https://docs.os.uk/osngd/using-os-ngd-data/os-ngd-transport/bus-lanes.md): Advice on how you can make the most of the data provided by the Bus Lane Feature Type.
- [Bus Lane Feature Type](https://docs.os.uk/osngd/using-os-ngd-data/os-ngd-transport/bus-lanes/bus-lane-feature-type.md): Information about the Bus Lane Feature Type, including a description, use cases for the data, and key attribution.
- [Road Link attribution](https://docs.os.uk/osngd/using-os-ngd-data/os-ngd-transport/bus-lanes/road-link-attribution.md): Details about the Bus Lane Presence attribution available in the Road Link Feature Type.
- [How bus lane data are created](https://docs.os.uk/osngd/using-os-ngd-data/os-ngd-transport/bus-lanes/how-bus-lane-data-are-created.md): Information on how OS creates bus lane data.
- [Known limitations](https://docs.os.uk/osngd/using-os-ngd-data/os-ngd-transport/bus-lanes/known-limitations.md): Information about the known limitations for bus lane data.
- [Cycle lanes](https://docs.os.uk/osngd/using-os-ngd-data/os-ngd-transport/cycle-lanes.md): Advice on how you can make the most of the data provided by the Cycle Lane Feature Type.
- [Cycle Lane Feature Type](https://docs.os.uk/osngd/using-os-ngd-data/os-ngd-transport/cycle-lanes/cycle-lane-feature-type.md): Information about the Cycle Lane Feature Type, including a description, use cases for the data, and key attribution.
- [Road Link and Path Link attribution](https://docs.os.uk/osngd/using-os-ngd-data/os-ngd-transport/cycle-lanes/road-link-and-path-link-attribution.md): Details about the Cycle Lane Presence attribution available in the Road Link and Path Link Feature Types.
- [How cycle lane data are created](https://docs.os.uk/osngd/using-os-ngd-data/os-ngd-transport/cycle-lanes/how-cycle-lane-data-are-created.md): Information on how OS creates cycle lane data.
- [Known limitations](https://docs.os.uk/osngd/using-os-ngd-data/os-ngd-transport/cycle-lanes/known-limitations.md): Information about the known limitations for cycle lane data.
- [Pavements](https://docs.os.uk/osngd/using-os-ngd-data/os-ngd-transport/pavements.md): Advice on how you can make the most of the data provided by the Pavement Link Feature Type.
- [Pavement polygons](https://docs.os.uk/osngd/using-os-ngd-data/os-ngd-transport/pavements/pavement-polygons.md)
- [Pavement attribution](https://docs.os.uk/osngd/using-os-ngd-data/os-ngd-transport/pavements/pavement-attribution.md)
- [Pavement Link Feature Type](https://docs.os.uk/osngd/using-os-ngd-data/os-ngd-transport/pavements/pavement-link-feature-type.md)
- [Street lights](https://docs.os.uk/osngd/using-os-ngd-data/os-ngd-transport/street-lights.md): Advice on how you can make the most of the data provided by the Street Light Feature Type.
- [Known limitations](https://docs.os.uk/osngd/using-os-ngd-data/os-ngd-transport/street-lights/known-limitations.md)
- [Trams](https://docs.os.uk/osngd/using-os-ngd-data/os-ngd-transport/trams.md): Advice on how you can make the most of the data provided by the Tram on Road Feature Type.
- [Tram presence attribution on Road Link](https://docs.os.uk/osngd/using-os-ngd-data/os-ngd-transport/trams/tram-attribution-on-road-link.md)
- [Tram On Road Feature Type](https://docs.os.uk/osngd/using-os-ngd-data/os-ngd-transport/trams/tram-on-road-feature-type.md)
- [Trams in the Rail Network](https://docs.os.uk/osngd/using-os-ngd-data/os-ngd-transport/trams/trams-in-the-rail-network.md)
- [OS NGD Land Cover Enhancements](https://docs.os.uk/osngd/using-os-ngd-data/os-ngd-land-cover-enhancements.md)
- [Introduction](https://docs.os.uk/osngd/using-os-ngd-data/os-ngd-land-cover-enhancements/introduction.md)
- [Habitat mapping](https://docs.os.uk/osngd/using-os-ngd-data/os-ngd-land-cover-enhancements/habitat-mapping.md)
- [Percentage coverage](https://docs.os.uk/osngd/using-os-ngd-data/os-ngd-land-cover-enhancements/percentage-coverage.md)
- [Cross reference table](https://docs.os.uk/osngd/using-os-ngd-data/os-ngd-land-cover-enhancements/cross-reference-table.md)
- [Known limitations](https://docs.os.uk/osngd/using-os-ngd-data/os-ngd-land-cover-enhancements/known-limitations.md)
- [Summary](https://docs.os.uk/osngd/using-os-ngd-data/os-ngd-land-cover-enhancements/summary.md)
- [OS NGD Land Use](https://docs.os.uk/osngd/using-os-ngd-data/os-ngd-land-use.md)
- [Understanding land use in the OS NGD](https://docs.os.uk/osngd/using-os-ngd-data/os-ngd-land-use/understanding-land-use-in-the-os-ngd.md)
- [What is land use in OS NGD?](https://docs.os.uk/osngd/using-os-ngd-data/os-ngd-land-use/understanding-land-use-in-the-os-ngd/what-is-land-use-in-os-ngd.md): Use this guide to find out how land use is represented in the OS NGD and the relationships between relevant feature types.
- [Land use classifications](https://docs.os.uk/osngd/using-os-ngd-data/os-ngd-land-use/understanding-land-use-in-the-os-ngd/land-use-classifications.md)
- [Address data in land use](https://docs.os.uk/osngd/using-os-ngd-data/os-ngd-land-use/understanding-land-use-in-the-os-ngd/address-data-in-land-use.md)
- [Mapping from Site Description values to NLUD values](https://docs.os.uk/osngd/using-os-ngd-data/os-ngd-land-use/understanding-land-use-in-the-os-ngd/mapping-from-site-description-values-to-nlud-values.md): A table mapping Site Description values to National Land Use Database (NLUD) values.
- [Accessibility](https://docs.os.uk/osngd/extra-links/accessibility.md)
- [Data Catalogue](https://docs.os.uk/osngd/extra-links/data-catalogue.md)
- [Contact Us](https://docs.os.uk/osngd/extra-links/contact-us.md): Signposting on how to contact OS if you have feedback on any of the OS NGD documentation.
- [Copyright](https://docs.os.uk/osngd/extra-links/copyright.md)


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information, you can query the documentation dynamically by asking a question.
Perform an HTTP GET request on a page URL with the `ask` query parameter:
```
GET https://docs.os.uk/osngd/readme-1.md?ask=<question>
```
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.