Welcome to OS Docs!
Welcome to documentation for OS data products and services!
This is a place where you can find all the necessary documentation to easily get started using Ordnance Survey's data and services.
Dive into our comprehensive guides, tutorials, references and specifications to unlock the full potential and insight that our data can offer.
OS NGD Documentation
Learn how you can get started using OS National Geographic Database (OS NGD) data via OS Select+Build and the OS NGD APIs.
OS APIs Documentation
Explore API references, getting started guides and examples for developing with OS APIs.
OS Download Products' Documentation
Discover documentation and guides for the OS Premium and OpenData Download products, such as OS Emergency Services Gazetteer (OS ESG), OS Multi-modal Routing Network (OS MRN), OS MasterMap Topography Layer, AddressBase Premium, OS VectorMap Local, OS MasterMap Imagery Layer, OS Open Zoomstack, and Boundary-Line.
Help and additional resources
Discover more resources that can help you build with OS data and services:
ℹ️ Customer support and resources
Product support, licensing guides, information on our data and help with your accounts.
🔎 OS NGD Data Viewer
A free interactive demonstrator of OS National Geographic Database (OS NGD) data that lets you visualise product sample data online for three areas.
🗺️ OS MasterMap Product Viewer tool
A free interactive demonstrator of OS data that lets you visualise product sample data online for three areas.
Sample data for numerous products is available through the tool, including OS MasterMap Topography Layer, AddressBase Premium, OS Open Roads and OS Open Zoomstack, amongst others.
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