# DATA STRUCTURE - [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 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 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) --- # 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. 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