This page provides the details of known data issues in the OS MasterMap Topography Layer product. Once resolved, details of a known data issue will be held on the page until the next product release.
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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.