LogoLogo
OS Docs HomeOS NGDOS APIsOS Download ProductsMore than MapsContact Us
  • More than Maps
  • Geographic Data Visualisation
    • Guide to cartography
      • Introduction to cartography
      • Types of maps
      • Symbology
      • Colour
      • Text on maps
      • Generalisation
      • Coordinate reference systems
      • Projections
      • Scale
      • Map legends
      • Map layout
      • Relief representation
      • North arrows
    • Guide to data visualisation
      • Introduction to data visualisation
      • GeoDataViz design principles
      • Types of visualisation
      • Thematic mapping techniques
      • Data visualisation critique
      • Accessible data visualisation
      • Ethical data visualisation
      • Software
      • Data
    • GeoDataViz assets
      • GeoDataViz basemaps
      • Stylesheets
      • GeoDataViz virtual gallery
      • Equal area cartograms
      • How did I make that?
        • Apollo 11 Landing
        • North York Moors National Park, 70 years
        • Snowdonia National Park, 70 years
        • Great Britain's National Parks
        • Great Britain's Islands
        • Great Britain's AONB's and National Scenic Areas
        • Famous shipwrecks of Pembrokeshire
        • Trig pillars today
        • Britain's most complex motorway junctions
      • #30DayMapChallenge
  • Data in Action
    • Examples
  • Demonstrators
    • 🆕Product Viewer
    • Addressing & location demonstrators
      • Address Portfolio overview
      • Which address product should you use?
      • AddressBase
      • AddressBase Core
      • AddressBase Plus
      • AddressBase Premium
      • Address Classifications
      • Addressing Lifecycle
      • OS Emergency Services Gazetteer
      • What are Vertical Streets?
      • Why are there differences in boundaries?
    • Contextual demonstrators
    • Customer best practice
      • Channel Shift
      • Data Management and OS Data Hub
      • End User Licence vs Contractor Licence
      • 🆕 IDs vs Spatial Relationships
      • Why we should capture good quality addresses at source
      • Why we Snap and Trace
    • Network Demonstrators
      • OS Detailed Path Network
      • OS Multi Modal Routing Network
        • OS Multi Modal Routing Network
      • Water Networks overview
      • OS MasterMap Highways Network and OS NGD Speeds
      • OS MasterMap® Highways Network and OS Open Roadsâ„¢
    • OS MasterMap Generation APIs
      • Using the OS Features API
      • Using the OS Features API Archive
      • Using the OS Downloads API
      • Using OS APIs in ESRI Software
    • 🆕OS NGD (National Geographic Database)
      • OS NGD Address
      • OS NGD Boundaries
      • 🆕OS NGD Buildings
        • 🆕Building and Building Access Feature Types
        • Building Part and Building Line Feature Types
      • 🆕OS NGD Geographical Names
      • OS NGD Land
      • OS NGD Land Cover enhancements
      • 🆕OS NGD Land Use
      • OS NGD Land Use enhancements
      • 🆕OS NGD Structures
        • 🆕OS NGD Structures
        • Field Boundaries
      • 🆕OS NGD Transport Features
      • 🆕OS NGD Transport Network
      • OS NGD Transport RAMI
      • OS NGD Water Features
      • OS NGD Water Network
      • OS NGD API - Features
      • Ordering OS NGD data
      • Change only updates
      • OS NGD Versioning
      • Creating a topographic map from OS NGD Data
      • Analytical styling for OS NGD data
    • OS MasterMap® demonstrators
    • 🆕Product & API Comparisons
      • 🆕Comparison of Water Network Products
  • Tutorials
    • GeoDataViz
      • Thematic Mapping Techniques
      • Downloading and using data from the OS Data Hub
      • How to download and use OS stylesheets
      • How to use the OS Maps API
      • Creating a bespoke style in Maputnik
    • GIS
      • Analysing pavement widths
      • Basic routing with OS Open Data and QGIS
      • Walktime analysis using OS Multi-modal Routing Network and QGIS
      • Creating 3D Symbols for GIS Applications
      • Constructing a Single Line Address using a Geographic Address
      • Creating a Digital Terrain Model (DTM)
      • Visualising a road gradient using a Digital Terrain Model
      • Visualising a road gradient using OSMM Highways
    • 🆕APIs
      • 🆕Using OS APIs with EPC API
      • 🆕OS APIs and ArcGIS
  • Deep Dive
    • Introduction to address matching
    • Guide to routing for the Public Sector
      • Part 1: Guide to routing
      • Part 2: Routing software and data options
      • Part 3: Building a routable network
    • Unlocking the Power of Geospatial Data
    • Using Blender for Geospatial Projects
    • A Guide to Coordinate Systems in Great Britain
      • Myths about coordinate systems
      • The shape of the Earth
      • What is position?
        • Types of coordinates
        • We need a datum
        • Position summary
      • Modern GNSS coordinate systems
        • Realising WGS84 with a TRF
        • The WGS84 broadcast TRF
        • The International Terrestrial Reference Frame (ITRF)
        • The International GNSS Service (IGS)
        • European Terrestrial Reference System 1989 (ETRS89)
      • Ordnance Survey coordinate systems
        • ETRS89 realised through OS Net
        • National Grid and the OSGB36 TRF
        • Ordnance Datum Newlyn
        • The future of British mapping coordinate systems
        • The future of British mapping coordinate systems
      • From one coordinate system to another: geodetic transformations
        • What is a geodetic transformation?
        • Helmert datum transformations
        • National Grid Transformation OSTN15 (ETRS89–OSGB36)
        • National Geoid Model OSGM15 (ETRS89-Orthometric height)
        • ETRS89 to and from ITRS
        • Approximate WGS84 to OSGB36/ODN transformation
        • Transformation between OS Net v2001 and v2009 realisations
      • Transverse Mercator map projections
        • The National Grid reference convention
      • Datum, ellipsoid and projection information
      • Converting between 3D Cartesian and ellipsoidal latitude, longitude and height coordinates
      • Converting between grid eastings and northings and ellipsoidal latitude and longitude
      • Helmert transformation worked example
      • Further information
  • Code
    • Ordnance Survey APIs
    • Mapping
    • Routing with pgRouting
      • Getting started with OS MasterMap Highways and pgRouting
      • Getting started with OS MasterMap Highways Network - Paths and pgRouting
      • Getting started with OS NGD Transport Theme and pgRouting
      • Getting started with OS NGD Transport Path features and pgRouting
  • RESOURCES
    • 🆕Data Visualisation External Resources
Powered by GitBook

Website

  • Ordnance Survey

Data

  • OS Data Hub
On this page
  • What data is in OS NGD Water Network?
  • OS NGD Water Network – Water Linkset​
  • What formats does the OS NGD Water Network data come in?​ ​
  • What is the new attribution?​
  • Source of new attributes​

Was this helpful?

  1. Demonstrators
  2. OS NGD (National Geographic Database)

OS NGD Water Network

A Lightning Talk

PreviousOS NGD Water FeaturesNextOS NGD API - Features

Last updated 9 months ago

Was this helpful?

What data is in OS NGD Water Network?

There are seven feature types in the OS NGD Water theme: four in the Features collection and three in the Network Collection. The geometry in the Network Collection is the same as OS MasterMap Networks - Water Layer, although the attribution is from OS NGD.​

This is a set of links that represent the full water network. ​

These are the node features that work with the water network to create a link and node structure

These are named watercourses, similar ​ to the Road data in the Transport theme​ and are made up of references to individual links, but are also given a geometry in their own right in OS NGD

OS NGD Water Network – Water Linkset​

Water Linkset is additional dataset in the Water Network data. This is the same principle as Roads and Streets in the Transport theme.​

In OS MasterMap Networks - Water Layer Water Links had a watercourse name but the entire watercourse was not present as a separate feature. In the OS NGD Water Network the full extent of named watercourses now exist as separate features in the Water Linkset data​

On the Water Link Feature Type the nameID attribute gives a cross reference between the Water Link and the Water Linkset feature it is part of. ​

There is also a wtr_ntwk_waterlinkset_wtrlinkref that gives a look-up between the two datasets​

What formats does the OS NGD Water Network data come in?​ ​

The OS NGD Water Network data comes in two formats, CSV and GeoPackage (GPKG)​

  • The GeoPackage format comes ready to load into the GIS package of the users choice with different gpkg files for each layer.​

  • The CSV format is more suited for loading into a database. It has all of the same layers in csv format and all the same attribution as the GeoPackage, however instead of storing the geometry in a GIS ready format, it is stored as a POINT, LINESTRING or MULTILINESTRING attribute with all of the vertices stored as co-ordinate pairs in the text file.​

What is the new attribution?​

The attribution has changed from the OS MasterMap Networks - Water Layer product:​

  • OS NGD data has an OSID​

  • The features have a TOID, version date and changetype similar to the OS MasterMap family of products, although the TOID is an optional field​

  • There are triple name fields to allow for alternative languages and alternative names. The example shown here is in Wales and has both a CYM and ENG names and an alternative name. Language names also have unique name IDs to distinguish between languages​

  • There is also information about geometry source, description, type, permanence. ​

  • Fields exist for catchment name, width and so on, but not all are populated currently​

The OSID in the Water Linkset and the Water Linkset ID in the Water Link Reference are the same value

The OSID in Water Link and the Water Link ID in the Water Link Reference are the same value ​

Source of new attributes​

Ordnance Survey surveyors and remote sensing teams have been capturing and maintaining information on land cover, land use and a more detailed level of description for over 10 years. ​

The more detailed data has previously been transformed and filtered to match attribution and content for existing products, such as OS MasterMap Networks - Water Layer, however in the OS NGD data it is being published at the original, more granular level.​

The new Water Linkset, similar to the Transport Network, has been generated from existing reference data but given a geometry in OS NGD.​


Links that may be useful:

This content has been developed from what was originally a Lightning Talk PowerPoint slide set. These slides are available to PSGA members to view and download from the

PSGA members area of the OS website
🆕
OS NGD Documentation Platform | osngd
Logo
OS Data HubOrdnanceSurvey
Logo
OS Select+Build | OS productsOrdnance Survey
Water Links
Water Nodes
Water Linkset
A Water Linkset example
Water Network attribution
Attribution accross the OS NGD Water Network Feature Types (click the image to enlarge it)
Page cover image
Logo