OS MasterMap Topography Layer Known Data Issues and Service Disruptions
This page provides the details of known data issues and service disruptions impacting the OS MasterMap Topography Layer product.
Live known data issues
Broken download links for OS MasterMap Topography Layer GML 5km tile download orders
Customer Topography 5x5 tile download orders supplied from 30 July 2025 to 12 August 2025 contain broken download links. As a result, an error message will be displayed saying there is no data available to download. This issue has now been fixed as of 12 August and new orders will not be impacted. Any impacted customers will be contacted directly and we aim to resupply any orders by 15 August 2025. Where customers have placed an initial, one off order, we advise reordering the data or contacting our fulfillment team ([email protected]) to request a resupply.
Missing FVDS file in the OS MasterMap Topography Layer (GML Non Geo chunk 30MB) Managed GB Set supplied on 28 April 2025
An issue has been identified with the recent OS MasterMap Topography Layer (GML Non-Geo chunk 30MB) Managed GB Set update order supplied on 28 April 2025. Unfortunately, the FVDS file was missing from the original order.
To address this, we have resupplied affected customers with a new update order containing the missing FVDS file. A notification email with instructions on how to download this new order has been sent out. Please disregard the initial order. The issue resulted from a manual user error, and we are working on solutions to prevent this happening in the future. We apologise for any inconvenience this may have caused and appreciate your understanding.
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