LogoLogo
OS Docs HomeOS NGDOS APIs OS Download ProductsMore than MapsOS Data Hub
  • OS NGD Documentation
  • INTRODUCTION TO OS NGD
    • Introduction to OS NGD
    • OS NGD Explained
    • OS NGD Key Benefits to Customers
    • OS NGD Sample Data
    • OS NGD Product Viewer Tool
  • GETTING STARTED
    • Getting Started Information
    • OS NGD Fundamentals
      • Terminology and access
      • File formats and naming
      • Data ordering and currency
      • COU supplies
      • Data schema versioning
      • Unique identifiers
      • Coordinate reference systems
      • Attribute information for feature types
    • Downloading with OS Select+Build
      • Getting Started with GeoPackage
        • ArcGIS Pro
        • ArcMap
        • Cadcorp SIS
        • MapInfo Professional
        • QGIS
        • FME
        • GDAL
      • Getting Started with CSV
        • Loading CSV files
        • Processing COUs
      • Getting Started with Attribute Filtering
      • Getting Started with Temporal Filtering
    • Accessing OS NGD APIs
      • Getting started with an API project
      • OS NGD API – Features
        • What data is available?
        • Technical Specification
          • Landing page
          • Conformance
          • Collections
          • Collection
          • Schema
          • Queryables
          • Features
          • Feature
        • Getting Started
          • GIS Software
            • Cadcorp SIS
            • ESRI ArcGIS Online
            • ESRI ArcGIS Pro
            • QGIS
          • Libraries
            • Leaflet
            • MapLibre GL JS
            • OpenLayers
            • Python (Geopandas)
        • Code Examples
      • OS NGD API – Tiles
        • What data is available?
        • Zoom Levels
        • Technical Specification
          • Landing page
          • Conformance
          • Collections
          • Collection
          • Tile Matrix Sets
          • Tiles
          • Styles
        • Getting Started
          • GIS Software
            • Cadcorp SIS
            • QGIS
          • Libraries
            • Leaflet
            • MapLibre GL JS
            • OpenLayers
        • Code Examples
    • Styling OS NGD Data
    • OS NGD Webinars, Tutorials and Case Studies
    • FAQs
  • OS NGD NEWS
    • OS NGD News
    • What's New?
    • Change Log
    • OS NGD Improvements
    • Future OS NGD Data Enhancements
  • Data and Service Status
    • Data and Service Status Information
  • 🆕Live Service Disruption and Planned Maintenance
  • Current Known Data Issues
  • 🆕Resolved Data Issues
  • USING OS NGD DATA
    • OS NGD Buildings
      • Building Feature Type
      • How Building data is created
      • Building attribution
      • Known limitations
      • Summary
    • OS NGD Structures
      • Field Boundary
        • Field Boundary Feature Type
        • How Field Boundary data is created
        • Field Boundary attribution
        • Known limitations
        • Summary
    • OS NGD Transport
      • Pavements
        • Pavement polygons
        • Pavement attribution
        • Pavement Link feature type
      • Trams
        • Tram attribution on Road Link
        • Tram On Road Feature Type
        • Trams in the Rail Network
      • Street Light
        • Known limitations
    • OS NGD Land Cover Enhancements
      • Introduction
      • Habitat mapping
      • Percentage coverage
      • Cross reference table
      • Known limitations
      • Summary
  • DATA STRUCTURE
    • Data Structure Information
    • OS NGD Address
      • GB Address
        • Built Address
        • Historic Address
        • Non-Addressable Object
        • Pre-Build Address
        • Street Address
      • Islands Address
        • Built Address
        • Historic Address
        • Non-Addressable Object
        • Pre-Build Address
        • Street Address
      • Related Components
        • Alternate Address
        • Postal Address
        • Other Classification
        • Related Entity
      • Versioning information
      • GB Address Local Custodian Codes
      • Islands Address Local Custodian Codes
    • OS NGD Administrative and Statistical Units
      • Boundaries
        • Boundary High Water Mark
        • Ceremonial County
        • Country
        • Devolved Parliament Constituency
        • Devolved Parliament Electoral Region
        • Electoral Division
        • GLA Assembly Constituency
        • Historic County
        • Historic European Region
        • Lower Tier Local Authority
        • Parish Or Community
        • Polling District
        • Region
        • Regional Authority
        • Upper Tier Local Authority
        • Ward
        • Westminster Constituency
    • OS NGD Buildings
      • Building Features
        • Building
        • 🆕Building Access Location
        • Building Line
        • Building Part
    • OS NGD Geographical Names
      • Named Features
        • 🆕Crowd Sourced Name Point
        • Named Area
        • Named Point
        • Named Road Junction
    • OS NGD Land
      • Land Features
        • Land
        • Land Point
        • Landform
        • Landform Line
        • Landform Point
    • OS NGD Land Use
      • Land Use Features
        • Site
        • Site Access Location
        • ❌Site Routing Point
    • OS NGD Structures
      • Structure Features
        • Compound Structure
        • Field Boundary
        • Structure
        • Structure Line
        • Structure Point
    • OS NGD Transport
      • Routing and Asset Management Information (RAMI)
        • Average And Indicative Speed
        • Highway Dedication
        • Maintenance Area
        • Maintenance Line
        • Maintenance Point
        • Reinstatement Area
        • Reinstatement Line
        • Reinstatement Point
        • Restriction
        • Routing Hazard
        • Routing Structure
        • Special Designation Area
        • Special Designation Line
        • Special Designation Point
      • Transport Features
        • Cartographic Rail Detail
        • Rail
        • Road Line
        • Road Track Or Path
        • 🆕Street Light
      • Transport Network
        • Connecting Link
        • Connecting Node
        • Ferry Link
        • Ferry Node
        • Ferry Terminal
        • Path
        • Path Link
        • Path Node
        • Pavement Link
        • Railway Link
        • Railway Link Set
        • Railway Node
        • Road
        • Road Junction
        • Road Link
        • Road Node
        • Street
        • Tram On Road
    • OS NGD Water
      • Water Features
        • Inter Tidal Line
        • River Basin District Catchment
        • Tidal Boundary
        • Water
        • Water Point
        • Waterbody Catchment
      • Water Network
        • Water Link
        • Water Link Set
        • Water Node
  • Code Lists
    • Code Lists Overview
      • accesstypevalue
      • 🆕accesslevelvalue
      • 🆕accessmodevalue
      • 🆕accessobstructionvalue
      • 🆕accesspurposevalue
      • addressbasepostalvalue
      • addressclassificationsourcevalue
      • addressdescriptionvalue
      • addressstatusvalue
      • addressstreettypevalue
      • associatedstreetdatadescriptionvalue
      • averageandindicativespeeddescriptionvalue
      • basementpresencesourcevalue
      • boundaryhighwatermarkdescriptionvalue
      • boundarytypevalue
      • 🆕buildingaccesslocationdescriptionvalue
      • buildingageperiodvalue
      • buildingagesourcevalue
      • buildingconnectivitytypevalue
      • buildingdescriptionvalue
      • buildinglinedescriptionvalue
      • buildingpartdescriptionvalue
      • buildingpartoslandcovertieravalue
      • buildingpartoslandcovertierbvalue
      • buildingusevalue
      • buildstatusvalue
      • builtstructureheightconfidencevalue
      • capturemethodvalue
      • capturespecificationvalue
      • ceremonialcountydescriptionvalue
      • changetypevalue
      • classificationcorrelationvalue
      • compoundstructuredescriptionvalue
      • connectinglinkdescriptionvalue
      • connectingnodedescriptionvalue
      • constructionmaterialsourcevalue
      • constructionmaterialvalue
      • countryvalue
      • countrydescriptionvalue
      • 🆕crowdsourcednamedescriptionvalue
      • 🆕crowdsourcednamematchtypevalue
      • cyclefacilityvalue
      • dataentitycatalogue
      • dedicationvalue
      • devolvedparliamentconstituencydescriptionvalue
      • devolvedparliamentelectoralregiondescriptionvalue
      • electoraldivisiondescriptionvalue
      • extentoflinkvalue
      • ferrylinkdescriptionvalue
      • ferrynodedescriptionvalue
      • ferryterminaldescriptionvalue
      • fieldboundarydescriptionvalue
      • formofroadnodevalue
      • formofwaytypevalue
      • gaugevalue
      • glaassemblyconstituencydescriptionvalue
      • gssrolevalue
      • hazardtypevalue
      • heightingmethodvalue
      • highwaydedicationnetworkfeaturetypevalue
      • historiccountydescriptionvalue
      • historiceuropeanregiondescriptionvalue
      • intertidallinedescriptionvalue
      • 🆕illuminationvalue
      • junctiontypedescriptionvalue
      • landdescriptionvalue
      • landformdescriptionvalue
      • landformlinedescriptionvalue
      • landformpointdescriptionvalue
      • landoslandcovertieravalue
      • landoslandcovertierbvalue
      • landformvalue
      • landpointdescriptionvalue
      • languagevalue
      • linkdirectionvalue
      • 🆕linkreferenceconfidencevalue
      • lowertierlocalauthoritydescriptionvalue
      • maintenancevalue
      • 🆕matchedfeaturetypengdvalue
      • 🆕matchedthemengdvalue
      • matchstatusvalue
      • classificationcorrelationvalue
      • namedareaextentdefinitionvalue
      • nameddatevalue
      • nameddayvalue
      • namedescriptiongroupvalue
      • namedescriptionvalue
      • namedperiodvalue
      • namedroadjunctiondescriptionvalue
      • namedtimevalue
      • networkfeaturetypevalue
      • 🆕networknodefeaturetypevalue
      • networkoverunderbridgevalue
      • operationalstatevalue
      • operationalstatusvalue
      • oslandusetieravalue
      • oslandusetierbvalue
      • parentboundarydescriptionvalue
      • parentfeaturetypevalue
      • parishorcommunitydescriptionvalue
      • pathdescriptionvalue
      • pathnodedescriptionvalue
      • physicallevelvalue
      • 🆕physicalstatevalue
      • physicallevelvalue
      • pollingdistrictdescriptionvalue
      • positionalaccuracyvalue
      • postcodetypevalue
      • presencevalue
      • raildescriptionvalue
      • raildetaildescriptionvalue
      • railoslandcovertieravalue
      • railoslandcovertierbvalue
      • railwaylinkdescriptionvalue
      • railwaylinksetdescriptionvalue
      • railwaynodedescriptionvalue
      • railwayusevalue
      • regionalauthoritydescriptionvalue
      • regiondescriptionvalue
      • reinstatementtypevalue
      • relationshiptypevalue
      • restrictiontypedescriptionvalue
      • restrictionvalue
      • riverbasindistrictcatchmentdescriptionvalue
      • roadclassificationvalue
      • roaddescriptionvalue
      • roadfunctionvalue
      • roadlinedescriptionvalue
      • roadnodedescriptionvalue
      • roadstructurevalue
      • roadtrackorpathdescriptionvalue
      • roadtrackorpathoslandcovertieravalue
      • roadtrackorpathoslandcovertierbvalue
      • roadwidthconfidencelevelvalue
      • 🆕roofconfidenceindicatorvalue
      • 🆕roofmaterialvalue
      • 🆕roofshapevalue
      • pavementdescriptionvalue
      • sideofroadvalue
      • siteaccesslocationdescriptionvalue
      • sitedescriptionvalue
      • siteextentdefinitionvalue
      • siteroutingpointdescriptionvalue
      • sourceofmeasurevalue
      • specialdesignationtypevalue
      • stakeholdervalue
      • statusvalue
      • streetclassificationvalue
      • streetdescriptionvalue
      • streetgeometrysourcevalue
      • 🆕streetlightdescriptionvalue
      • streetstatevalue
      • streetsurfacevalue
      • streettypevalue
      • structuredescriptionvalue
      • structureoslandcovertieravalue
      • structureoslandcovertierbvalue
      • structurelinedescriptionvalue
      • structurepointdescriptionvalue
      • structuretypevalue
      • structurevalue
      • surfacetypevalue
      • themevalue
      • tidalboundarydescriptionvalue
      • trackrepresentationvalue
      • tramdescriptionvalue
      • 🆕transportfeaturetypevalue
      • uppertierlocalauthoritydescriptionvalue
      • usrnmatchindicatorvalue
      • vehiclequalifiervalue
      • warddescriptionvalue
      • waterbodycatchmentdescriptionvalue
      • waterbodycategoryvalue
      • waterdescriptionvalue
      • wateroslandcovertieravalue
      • wateroslandcovertierbvalue
      • waterlinkdescriptionvalue
      • waterlinkflowdirectionvalue
      • waterlinkgeometrysourcevalue
      • waterlinklevelofdetailvalue
      • waterlinkpermanencevalue
      • waterlinkphysicalcontainmentvalue
      • waterlinkprimacyvalue
      • waterlinksetdescriptionvalue
      • waterlinkwatertypevalue
      • watermarkvalue
      • waternodedescriptionvalue
      • waterpointdescriptionvalue
      • watertypevalue
      • westminsterconstituencydescriptionvalue
      • yesnovalue
  • EXTRA LINKS
    • Accessibility
    • Data Catalogue
    • Contact Us
    • Copyright
    • PSGA Product Summary
Powered by GitBook
On this page
  • Generic OS NGD resolved data issues
  • OS NGD Address Theme resolved data issues
  • OS NGD Administrative and Statistical Units Theme resolved data issues
  • OS NGD Buildings Theme resolved data issues
  • OS NGD Geographical Names Theme resolved data issues
  • OS NGD Land Theme resolved data issues
  • OS NGD Land Use Theme resolved data issues
  • OS NGD Structures Theme resolved data issues
  • OS NGD Transport Theme resolved data issues
  • OS NGD Water Theme resolved data issues

Was this helpful?

Export as PDF

Resolved Data Issues

PreviousCurrent Known Data IssuesNextOS NGD Buildings

Last updated 5 days ago

Was this helpful?

This page lists resolved data issues in relation to the OS NGD themes, collections and feature types.

Please see the page for details about current live data issues issues.

Any live interruptions to the availability of OS NGD API – Features and OS NGD API – Tiles will be documented on the .

Generic OS NGD resolved data issues

The generic data issues in the table below impacted multiple OS NGD themes:

Data Issue Name
Original Description for Data Issue
Data Issue Resolution Date
Resolution Message

Interruption to the supply of Daily Updates for OS NGD Building Part (February 2025) and impact on topological data ‘surface’ of OS NGD 'Feature' Collections

We are currently deploying improvements to the Building Height data available on OS NGD Building Part (data schema v1.0 and v2.0) until 24 February 2025. During this period, daily updates to the Building Part Feature Type, such as changes captured by surveyors, will be temporarily paused. These changes will be reflected in the product data after the completion of the improvements.

Consequently, users may observe anomalies in the consistency of the topological surface when utilising various OS NGD 'Feature' Collections (such as OS NGD Land Features). These anomalies will manifest as holes or overlaps where the Building Part feature has not been updated concurrently with the surrounding features. This impact will also be visible in OS NGD API – Features and OS NGD API – Tiles.

Please note that we advise against using counts from the OS NGD Building Part Feature Type with a temporal filter set between 02 February 2025 and 24 February 2025 as the counts may not be accurate due to the impact on a small number of topographic features.

24/02/2025

The improvements were completed by 24/02/2025 as planned and Daily Updates resumed as normal for impacted feature types.

Please note that we advise against using counts from the OS NGD Building Part Feature Type with a temporal filter set between 02 February 2025 and 24 February 2025 as the counts may not be accurate due to the impact of the improvement work on a small number of topographic features.

3D geometry missing in GeoPackage format for some feature types in the OS NGD Transport Network and Water Network Collections

In the OS NGD Transport Network Collection and OS NGD Water Network Collection, there are multiple feature types that contain 3D geometry. We are aware of an issue where 3D geometry is not being supplied in the GeoPackage format. This issue impacts the following feature types: Connecting Link, Connecting Node, Ferry Link, Ferry Node, Path Link, Path Node, Road Link, Road Node, Water Link and Water Node. Customers taking CSV format will not be affected.

26/11/2024

This issue was resolved on 26 November 2024. To receive updated data:

  • Customers who have only ordered once: Customers will need to re-order to receive the corrected data.

  • Monthly Update Customers: 01 December monthly updates with corrected data will be supplied as normal.

  • Annual Update Customers: 01 January annual updates with corrected data will be supplied as normal.

Topographic features missing from four feature types

From 26 September 2024 to 31 October 2024, an issue affected the following four OS NGD feature types, causing features to be missing from the data:

  • OS NGD Building Part Feature Type: ~80 000 features are missing from data schema v2.0 compared to data schema v1.0.

  • OS NGD Land Feature Type: ~38 000 features are missing from data schema v3.0 compared to data schema v2.0.

  • OS NGD Water and OS NGD Structure Feature Types: ~100 features are missing in total across both feature types from data schema v3.0 compared to data schema v2.0.

For example, where an affected Building feature should be visible, a blank area will instead be seen, creating a ‘gap’:

31/10/2024

This issue was resolved on 31 October 2024. Any data ordered or provided after this date will include the fixed data.

Please note, we advise against using counts from the four aforementioned affected OS NGD feature type datasets when taking historic snapshots of data between 26 September 2024 and 31 October 2024 as the counts may not be accurate due to the missing topographic features.

OS NGD Address Theme resolved data issues

Data Issue Name
Original Description for Data Issue
Data Issue Resolution Date
Resolution Message

UPRNs incorrectly in both Pre-Build Address and Built Address Feature Type tables

Four UPRNs (Unique Property Reference Numbers) incorrectly appear in both feature types: 10096454138, 10096454142, 10096759815, 10096759820.

This issue is being prioritised and an update will be provided as soon as the issue has been fixed.

19/03/25

The issue has now been resolved and the UPRNs only appear in one feature type.

OS NGD Administrative and Statistical Units Theme resolved data issues

No current resolved data issues to note for this theme.

OS NGD Buildings Theme resolved data issues

No current resolved data issues to note for this theme.

OS NGD Geographical Names Theme resolved data issues

No current resolved data issues to note for this theme.

OS NGD Land Theme resolved data issues

Data Issue Name
Original Description for Data Issue
Data Issue Resolution Data
Resolution Message

Site count discrepancies for some Land features

In a small number of instances, the Containing Site Count attribute presents the wrong value in Land features. This error only impacts 0.7% of Land features, and we expect it to be fixed by early October 2024.

12/10/2024

This issue was resolved on 12 October 2024. Any data ordered or provided after this date will include the fixed data.

OS NGD Land Use Theme resolved data issues

No current resolved data issues to note for this theme.

OS NGD Structures Theme resolved data issues

No current resolved data issues to note for this theme.

OS NGD Transport Theme resolved data issues

Data Issue Name
Original Description for Data Issue
Data Issue Resolution Date
Resolution Message

Duplicate Street Light features

There are around 84 000 Street Light features that are duplicated in Milton Keynes, Bedford and surrounding areas. This means that in this area, each street Light geometry is replicated twice; however, each geometry will still have its own unique OSID.

03/04/2025

This issue was resolved on 03 April 2025. Customers who take monthly updates will see this fix in the next update on 01 May 2025.

Incorrect Street Light coverage values on Road Links

We are aware of an issue that has caused a small number of incorrect values for Street Light coverage attribution on Road Links. Impacted Road Links will have a Presence Of Street Light Coverage attribute value that does not align with the evidence of street light presence in the Street Light Feature Type.

For example, a Road Link that has Street Lights features along it may have a coverage value of 'Fully Unlit' when it does in fact have Street Light features alongside it.

This issue affects approximately 0.45% of Road Links.

03/04/2025

This issue was resolved on 03 April 2025. Customers who take monthly updates will see this fix in the next update on 01 May 2025.

Incorrect speed values

Speed data is supplied quarterly from our third-party supplier. We have identified an issue in which OS have not correctly processed this data. This has resulted in possible incorrect values in the Average and Indicative Speed Feature Type.

25/07/2024

This issue was resolved on 25 July 2024. Any data ordered or provided after this date will include the fixed data.

Welsh speed limit changes

On 17 September 2023, default 20 mph speed limits were introduced across Wales. We are aware that these changes are not yet reflected in the Average and Indicative Speed Feature Type. Speed limit data is supplied by our third-party supplier quarterly. The most recent supply occurred before the Welsh speed limit changes took place and therefore will not be reflected in the OS NGD until the next supply. We expect the updated Welsh speed limits to be in NGD from December 2023.

13/12/2023

This issue was resolved on 13 December 2023. Any data ordered or provided after this date will include updated Welsh speed limit data.

Incorrect speed values

In the Average and Indicative Speed Feature Type, the indicative speed value for individual Road Links can be inferred by Ordnance Survey. We are aware that in certain instances some of these indicative speed values are incorrect. We are working to resolve this issue and have an approximate implementation date of the start of July 2023. This issue impacts just over 2% (174 000) of the total Road Links in the Average and Indicative Speed Feature Type.

02/07/2023

This issue was resolved on 02 July 2023. Any data ordered or provided after this date will include the fixed data.

OS NGD Water Theme resolved data issues

No current resolved data issues to note for this theme.

🆕
Current Known Data Issues
Service Availability Dashboard on the OS Data Hub