Releasing data derived from OS maps with confidence

Since 2011, we've been promoting and encouraging the release, under the terms of the Open Government Licence (OGL), of public sector derived data created by you under the Public Sector Mapping Agreement or the One Scotland Mapping Agreement. Releasing derived data is so valuable as its transparency allows for the development of new digital services. Here's how you can do it.

You can publish so much of your own data

We're encouraging you to release the data you draw on top of OS maps. Between 2015 and 2018, public sector bodies have released over 2,500 datasets under the presumption to publish process.

If you have created a data set from any of the OS open data products or if it has been created using a PSMA/OSMA licensed product but does not replicate any of the features or attributes that are not in an open product there is no issue regardless of what the data is about.

Notify us of your intentions (log in required)


Information you find in a 'local plan' including action zones and restrictive areas. Think planning policy areas and infrastructure plans rather than individual property information.


Defined routes and locations irrespective of mode of travel, and things that facilitate travel too. Think gritting routes, bus stops, etc.


From nature reserves and air quality areas to monitoring facilities.

Citizen services

Facilities including libraries, funded school catchments, advice agencies, health and wellbeing centres, sports centres, litter and dog bins and polling stations.

Business administration

Information relating to your internal operations and management activities, for example operational boundaries, inventories and stock lists.

Electoral administration

Parliamentary and local boundaries along with associated sub-sets.


Heritage and archaeological information.


CCTV camera and safeguarding locations.


Activity-based datasets focused on disease control and food inspections.

If you have used a PSMA or OSMA product and replicated features or attributes directly from the data that don't meet the published criteria then check it.

Check published criteria

Creating an alternative open dataset

Creating a substitute to an open product from a premium dataset? You’ll need to check with us.

You are publishing PSMA or OSMA data in part or its entirety.

Reproducing a premium dataset

You aren't allowed to republish a premium dataset or create a substitute for a premium product, e.g. single property level data / significant proportion of data for entire area.

Derived Data: Derived Data is a term used to describe new datasets or information which have been created using an existing dataset or information asset. Where, during the creation of new data, you have benefited from or relied on made use of an existing dataset or information asset, including features, data attribution or textual content, that data could be considered derived.

Presumption to Publish: You can release under OGL terms any derived dataset you produce as part of your core business activity, using our Licensed Data, provided your derived dataset doesn't include a substantial amount of features or data attribution from such Licensed Data and is not a Commercial or Competing Activity. The derived dataset needs to be released independently of the Licensed Data used to create it and you must notify us of such release.

Our policy and remit at Ordnance Survey

We're tasked by UK Government to operate a commercial licensing model.  As part of this model, we are also tasked to make OS data available and accessible to those providing services to UK citizens.

Geospatial data is being used to support new housing developments, protect our environment, inform future transport planning and help security services keep the country safe.

More than 4,700 public sector organisations across Great Britain are using OS data for the public good.

We aim to...

  • Support the responsible custodianship of OS data to facilitate greater service provision for citizens.
  • Maximise use of data to enable citizens to interact with their local digital economy.
  • Encourage more use of third party datasets with OS data.

Which results in...

  • Benefits to the citizens of Great Britain and those who serve them.
  • Help for you to release the value within your data.
  • Recognition of the value in your data.

It's your data, have the confidence to release it

If it's just your data (i.e. if it isn't derived data) go for it, there's no need to ask us!

Notify us of your intentions using this form (log in required)