🆕OS BaseMap Pro
Here you will find information about the OS BaseMap Pro product.
OS BaseMap Pro will be our newest topographic vector product, providing our most detailed, trusted and accurate representation of Great Britain’s built and natural landscape. It will deliver a clear and consistent basemap for organisations that need to visualise, locate and digitise large-scale features with high-quality cartography. This product will be the replacement for OS MasterMap Topography Layer.
OS BaseMap Pro has been designed to be easy to integrate with OS National Geographic Database (OS NGD) data available via OS Select+Build on the OS Data Hub, helping you connect richly attributed data with familiar OS cartographic context to unlock enhanced analytical use cases.
OS BaseMap Pro is currently entering the second prototype phase of development.
Using OS BaseMap Pro
OS BaseMap Pro will be a complete Premium download product, meaning that it cannot be generated from OS Select+Build with styling applied. The new product will contain key features required for visualisation and digitisation, such as cartographic text and topographic lines, and other visual features that are unavailable in the OS NGD collections. To increase accessibility, this product will also be made available through OS APIs.
Why migrate to OS BaseMap Pro?
Over the last three years, OS has developed and delivered the OS National Geographic Database (OS NGD) to provide the next generation of OS data with enriched attribution, increased currency and easier access methods. As it matures, the OS NGD continues to evolve and expand, unlocking future opportunities for geospatial data for Great Britain and enabling customers to do more with OS data.
In contrast, OS MasterMap Topography Layer was created over 25 years ago for a different era of data delivery. Its legacy schema, formats and refresh cycle mean that it's no longer suited to meet modern requirements as organisations transition to OS NGD-powered products and services.
When looking for an alternative, our customers have told us they need a basemap that provides:
Refreshed cartography for today's digital platforms, including pre-integrated styling and improved stylesheets implementing modern styles while keeping the familiar, highly detailed OS look and feel.
Trusted and authoritative topographic detail, enriched with cartographic text and created from OS's most reliable sources, with the confidence expected from the UK's national mapping agency.
Straightforward compatibility with OS NGD themes, unlocking advanced analytics, smoother adoption and long-term alignment with OS's new data infrastructure.
A stable replacement for OS MasterMap Topography Layer, powered by the OS NGD for long-term compatibility with modern systems.
Modern data formats and more frequent refresh cycles, making it easier to access key updates sooner.
OS BaseMap Pro is being developed to combine the trusted OS look and feel with the strength, flexibility and future-readiness of the OS NGD to ensure your organisation is equipped for the next era of geospatial data.
Product release timeline
OS BaseMap Pro is being developed through a series of early lifecycle builds, allowing us to ensure we are fully aligned with customer feedback at every stage of development.
How can I take part?
OS BaseMap Pro is currently entering the second prototype phase of development.
If you would like to take part in the Prototype 2 trial, please register your interest by filling out this Microsoft Form sign-up sheet with your contact details. Your OS Account Manager will also be happy to discuss OS BaseMap Pro and taking part in the Prototype 2 trial with you.
Prototype 2 will cover 17 areas of interest (AOI) across Great Britain. A user engagement round will take place in April 2026 and close mid-May 2026.
Licensing terms
It is our intention that OS BaseMap Pro replaces OS MasterMap Topography Layer, and as such it will be available under the same licensing terms. This includes being free at the point of use for Public Sector customers while also being available on commercial terms for non-Public Sector customers. While the product remains in development, it will be available under Data Exploration terms in most cases.
You can read more about the Public Sector Geospatial Agreement (PSGA) and discover which products are included on the PSGA Product summary page in the Resources section.
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