Structure Features

The OS National Geographic Database (NGD) Structure Features Collection gives you access to a standalone dataset containing the most current and comprehensive structures data captured by Ordnance Survey.

Structures are defined as features which are of manmade construction but are not buildings, for example, dams, hedges, bridges, chimneys, statues, post boxes, cranes, cattle grids, and sea walls. These features can have point, line, or polygon geometry.

Example image showing what the feature types in the Structure Features Collection look like in the data. A background map has been included to provide context.

Example image showing what the Field Boundary feature types look like in the data. A background map has been included to provide context.

Collection applications

The OS NGD Structure Features Collection allows you to:

• Ensure your structures data is always completely up to date with up to daily updates.

• Perform powerful analytics, underpinned by unrivalled OS accuracy.

• Quickly interpret structure type using the 'Description' attribute value (such as a roofed storage tank, a chimney, or a telecommunications mast).

• Use enhanced change metadata to monitor and understand how structures are changing.

• Easily perform feature counts for Compound Structures (this feature type is explained below) to understand the quantity present within your area of interest.

Key elements

• Up to daily updates to data.

• Plug and play – the data is simple and quick to implement as you don't need to pre-process it before you use it.

• Rich attribution ensures the data is straightforward to navigate and query.

• Simplified attribute naming helps make names easier to understand.

• Persistent unique identifiers with lifecycle information.

• Name attribution (if known) available for features, so you can identify what a structure is called.

• Land use classification provided for the Structure Feature Type, helping you understand feature function.

• Compound Structure Feature Type combines multiple polygons into a single polygon, making it easier for you to analyse and query data when you want to analyse a structure as a single part rather than its constituent parts.

• Height data available for chimneys, roofed tanks and glasshouse features.

• Field Boundary Feature Type identifies the location and nature of a physical boundary feature when adjacent to specific types of land cover.

Coverage

Great Britain. Field Boundary features are predominately in Rural and Moorland areas.

Default coordinate reference system

British National Grid (EPSG: 27700).

Temporal filtering

The earliest date on which you can request a one-off snapshot of a date in the past for data in this collection is noted at the top of the individual feature type pages.

Supply formats

GeoPackage, CSV (comma-separated values), GeoJSON or vector tiles (the latter format is not available for one feature type in the collection: Structure Point).

Supply mechanism

Accessed through the OS Data Hub via:

• OS Select+Build

• OS NGD API – Features

• OS NGD API – Tiles (not available for one feature type in the collection: Structure Point)

Using our data

• Included in the Public Sector Geospatial Agreement (PSGA) – therefore, it's free at point of use for Public Sector organisations.

• Available to OS Partners for commercial resell in your solutions.