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 |
| 29 March 2021 | 11 March 2021 |
All layers are available to order on DVD, via FTP or through the datahub.
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
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.
| Publication date | Extraction date |
| 10 May 2021 | 22 April 2021 |
| 21 June 2021 | 3 June 2021 |
| 2 August 2021 | 15 July 2021 |
| 13 September 2021 | 26 August 2021 |
| 25 October 2021 | 7 October 2021 |
| 6 December 2021 | 18 November 2021 |
Past publication dates
Here are the dates when OS MasterMap Topography Layer was previously refreshed:
| Publication date | Extraction date |
| 15 February 2021 | 28 January 2021 |
| 4 January 2021 | 10 December 2020 |
| 30 November 2020 | 12 November 2020 |
| 5 October 2020 | 17 September 2020 |
| 24 August 2020 | 6 August 2020 |
| 13 July 2020 | 25 June 2020 |
| 1 June 2020 | 14 May 2020 |
OS MasterMap Sites layer updates
OS MasterMap Sites Layer is updated every six months. The latest update is from April 2021.
Building Height Attribute updates
Building Height Attribute is updated every six months. The latest update is from April 2021.
Download our Building Height Attribute release note (PDF) and Coverage Map (PDF).