Get the latest dates when OS MasterMap data is refreshed. Plus you can find future refresh dates.
OS MasterMap Topography Layer
The latest OS MasterMap Topography data release is:
| Publication date | Extraction date |
| 24 August 2020 | 5 August 2020 |
All layers are available to order on DVD, via FTP or through the download centre.
Publication notes
As part of our commitment to improving our processes we have updated how we supply release notes to include more information. This will include all refresh data for the OSMM Topography layer including the tidal update program.
Download our OS MasterMap Topography release notes (PDF).
Future refresh dates
| Publication date | Extraction date |
| 5 October 2020 | 16 September 2020 |
| 16 November 2020 | 29 October 2020 |
Below is our future schedule of extraction and publication dates for OS MasterMap Topography Layer. We aim to keep this schedule 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.
Please note these dates only apply to bespoke polygons, 'area of interest' orders and national sets.
Past publication dates
Here are the dates when OS MasterMap Topography Layer was previously refreshed:
| Publication date | Extraction date |
| 13 July 2020 | 25 June 2020 |
| 1 June 2020 | 14 May 2020 |
| 21 April 2020 | 02 April 2020 |
| 2 March 2020 | 13 February 2020 |
| 27 January 2020 | 9 January 2020 |
| 16 December 2019 | 2 December 2019 |
| 4 November 2019 | 17 October 2019 |
| 23 September 2019 | 5 September 2019 |
| 19 August 2019 | 2 August 2019 |
| 30 July 2019 | 12 July 2019 |
| 18 June 2019 | 31 May 2019 |
| 8 May 2019 | 19 April 2019 |
| 26 March 2019 | 8 March 2019 |
| 25 February 2019 | 6 February 2019 |
| 21 January 2019 | 3 January 2019 |
OS MasterMap Sites layer updates
OS MasterMap Sites Layer is updated every six months. The latest update is from April 2020.
Building Height Attribute updates
Building Height Attribute is updated every six months. The latest update is from April 2020.
Download our Building Height Attribute release note (PDF) and Coverage Map (PDF).