13th June 2018

OS MasterMap – Statement for Partners & Customers


Today, the Prime Minister has announced further information on opening-up OS MasterMap data. This is in response to the 2017 Autumn Budget commitment to “establish how to open up freely the OS MasterMap data to UK-based small businesses in particular, under an Open Government Licence or through an alternative mechanism, while maintaining the OS’s strategic strengths”.

The Government has revealed that key parts of this nationally important geospatial dataset are being made completely open under Open Government Licence (OGL). This includes property extents derived from OS MasterMap Topography Layer and a number of spatial identifiers. Other key information in OS MasterMap will be made freely available, up to a threshold of transactions, and accessed via a new suite of Application Programme Interfaces (APIs.)








What data is being made free?

The data that will be made available for free up to a threshold through APIs are:


The datasets planned to be made available under OGL are:


What next?

OS has been working closely with Cabinet Office and the recently formed Geospatial Commission on a number of options to support the opening up of OS MasterMap. The work is now entering an implementation period during which the changes will take effect. We will be focusing on how we will deliver the products through an API and developing the supporting licenses.


Read the official press release by www.gov.uk

For further information read the press release at www.os.uk/media or visit www.os.uk/openmastermap.