dataset · United Kingdom
OS MasterMap Topography Layer
OS MasterMap Topography Layer is the most detailed and accurate view of Great Britain's landscape. It includes features representing the manmade and natural environment, including: roads, tracks and paths; land cover; buildings; water; rail; height;heritage; structures and; administrative boundaries. All features are assigned a unique Topographic Identifier (TOID).
Visit source ↗Source details
Licence: []
Evidence quality: 53.4
Listed in data.gov.uk public catalogue API on 2026-10-16; relevance/value screened (haiku).
Metadata checked: 2026-10-14T13:20:00.000Z
What's in it
- Data offered docs-verified
- roads, tracks and paths · land cover · buildings · water · rail · height · heritage · structures · administrative boundaries · Topographic Identifier (TOID) per feature
- Coverage docs-verified
- Great Britain
- Update frequency docs-verified
- quarterly
- Access docs-verified
- Licence not set on the dataset page; no auth listed in the entry. Terms need checking with Ordnance Survey before use.
Useful for
- Use cases llm-inferred
- FRA baseline mapping of buildings, water and roads from OS MasterMap features · Drainage strategy site base layer using land cover, buildings and water features · BNG habitat context mapping using land cover features
- Audience llm-inferred
- GIS analysts · flood consultants · drainage engineers · civils engineers · planners
Limitations
- Constraints llm-inferred
- Licence not set on the dataset page, so terms of use are unclear · Spatial resolution not stated in the docs · Data format and delivery method not stated in the docs; the listed resource is the OS Features API · Update cadence is quarterly, so it may lag recent change
Evidence
- https://docs.os.uk/os-downloads/topography/os-mastermap-topography-layer
- https://www.data.gov.uk/dataset/96083a9f-6714-4301-9890-98924c4c723e/os-mastermap-topography-layer2
Check upstream coverage, uncertainty and licence before use. Station observations are not forecasts or design levels.