OS MasterMap data availability dates

Latest OS MasterMap release details

  • The latest OS MasterMap Topography and ITN data release is:
Publication dateExtraction date
17 July 2017 29 June 2017

All layers are available to order on DVD, via FTP or through the Download centre.

Publication notes

As a part of our Continuous revision activity, we perform the improvements on OS MasterMap urban content. More information about the progress is available here.

As a part of our ongoing Cyclic revision since July 2016 we have updated Tidal data for the following areas:

OS MasterMap Topography Layer contains a very small number of overlapping polygons and 'holes' in the data. These problems are transient and the application of normal Change Only Updates (COU) will remove them in due course.

Known Topography Layer issues:

  • There is a gap and overlap caused by an error near Leeds, see image.
  • There is a tiny overlapping line near Northwich, see image.
  • There is an overlapping line near Malinslee, Telford, see image.

Known ITN Layer issues:

  • There is a COU mismatch with the FVDS in this release where the COU has been supplied with invalid network references and are not in the FVDS. The updates for these features, where they reference the correct network reference, will be supplied in the next release. There are 8 features affected in total – 2 Road Route Information (osgb4000000008063143, osgb5000005167686265) and 6 Road Link Information (osgb4000000007491626, osgb4000000029673052, osgb5000005125372546, osgb5000005151014506, osgb5000005151014508, osgb5000005161753989) features. For the interim period, we recommend the customer leaves their holdings as is and wait for the next COU fix the discrepancies.
  • There is an incorrect grade separation value on the eastbound A9 resulting in blocked routing. This is due to a road link (osgb4000000004317168) failing to reference a link node (osgb5000005203112886) when going over an underpass (287170, 708614) resulting in a grade separation of 0.
  • There is a missing Road Number attribute on the B4148 slip road (osgb4000000019361853).

All previously published errors have been corrected.

For past messages, please see the archive.

Urban Path Network updates

This release is validated against and aligned to OS MasterMap® Integrated Transport Network™ released on 05 June 2017.

ProductLatest version
OS MasterMap ITN Layer Urban Paths – country zip files July 17 
OS MasterMap ITN Layer Urban Paths – 5x5 tile download July 17

Future publication of Urban Path Network

Below is our future schedule of publishing Urban Path Network and the ITN product release with which it will have been validated and aligned. We aim to keep these schedules up to date, but you should treat these dates as a guide only as they are subject to change. The ITN used for validation and alignment will be confirmed when Urban Path Network is published.

Urban Path Network OS MasterMap ITN Layer
October 2017 29 August 2017

OS MasterMap Sites Layer updates

OS MasterMap Sites Layer is updated every six months. Please see the table below for the latest release date:

 OS MasterMap Sites Layer  April 2017

Building Height Attribute updates

Building Height Attribute is an alpha release currently under the development. Please see the table below for the latest release date:

 Building Height Attribute  December 2014

Future publication dates

Below is our future schedule of extraction and publication dates for OS MasterMap Topography and ITN layers. We aim to keep these schedules up to date, but you should treat these dates as a guide only as they are subject to change. The extraction date will be confirmed on the publication date.

Publication dateExtraction date
29 August 2017 8 August 2017
9 October 2017 21 September 2017
20 November 2017 2 November 2017
3 January 2018 7 December 2017
12 February 2018 25 January 2018

Please note that these dates only apply to bespoke polygons, 'area of interest' orders and national sets – please see Managed GB Dataset information if you take a full or change only supply of a complete OS MasterMap layer.

Past publication dates

The release dates for the previous year OS MasterMap Topography and ITN data were:

Publication dateExtraction date
5 June 2017 18 May 2017
2 May 2017 6 April 2017
13 March 2017 16 February 2017
30 January 2017 12 January 2017
19 December 2016 1 December 2016
14 November 2016 20 October 2016
3 October 2016 8 September 2016
22 August 2016 4 August 2016
11 July 2016 23 June 2016
31 May 2016 12 May2016
18 April 2016 1 April 2016
7 March 2016 18 February 2016