Find out how to get started using OS OpenData.
Linked Identifiers API
Access the valuable relationships between property, location, and mapping data. Combine datasets that are using multiple identifiers of our addressing data.
OS Open MasterMap
The OS Open MasterMap Implementation Programme enables businesses and developers to access more geospatial data for free.
Discover free OS mapping data
Check out our range of open products and integrate our data into your applications, bringing your solutions to life.