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Licensing of data that includes data from the Ordnance Survey

History

The Government's 2011 Autumn Statement referred to the release of public rights of way data. It said: Ordnance Survey has committed to amend its derived data restrictions on Local Authorities'  Public Rights of Way data,
enabling this to be released more easily as Open Data.

Here's the text of the Government's 2011 Autumn Statement.

In May 2012 Hampshire County Council were the first local authority to announce that their public rights of way data was released on terms equivalent to the Ordnance Survey OpenData Licence. At about this time, the Ordnance Survey provided advice to local authorities about the procedure for obtaining an exemption from the Public Sector Mapping Agreement. If the local authority met the Ordnance Survey's criteria then the local authority was in a position to release their data on terms equivalent to the Ordnance Survey OpenData Licence.

Here's the text of the Ordnance Survey OpenData Licence.

Many were unhappy that the Ordnance Survey was using the Ordnance Survey OpenData Licence, its own variant of the Open Government Licence, rather than the actual Open Government Licence:
ODUG
OSM website
Rob Nickerson
Robert Whittaker

The current position

In April 2015, the Ordnance Survey changed its position. When belatedly in May 2016 I e-mailed the Ordnance Survey about the councils that had, during the last few years, successfully obtained an exemption from the Public Sector Mapping Agreement and released their data under terms equivalent to the Ordnance Survey OpenData Licence, Richard Mortara, Public Sector Contracts Manager of the Ordnance Survey, replied: All data exempted by Ordnance Survey is now covered by the Open Government Licence (OGL),
which superseded its own OS OpenData licence in April 2015.

Here's the text of the Open Government Licence.