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OS MasterMap Imagery Layer support

The Imagery Layer is digital aerial photography of the highest quality that is expertly colour-balanced and corrected for geometric distortions (orthorectified).

Getting started

The OS MasterMap Imagery Layer adds a visual and contextual capability to the other OS MasterMap Layers and OS data.

Product guide (PDF)

OS MasterMap Imagery Layer aims to provide a reliable and consistent source of orthorectified aerial photography for general business use in Great Britain.

Release note (PDF)

This release note provides information about the November release of OS MasterMap Imagery Layer. Updated November 2019.

OS MasterMap Imagery Layer FAQs

Technical information

The technical specification contains details on the visual appearance of the ortho images within the imagery layer. It includes positional and geometric fidelity requirements and detail on mosaicing and edgematching between areas of imagery collected at different times.


Key FeaturesWhat this product offers
FormatJPEG, TIFF and ECW
MetadataXML format for each block, including day, month and year flown
Update frequencyQuarterly (February, May, August and November), as part of our three year cyclic revision programme synchronised with large-scale data updates.
SupplyDownload or, for large orders, portable hard drive
CoverageGreat Britain
Product refreshQuarterly full supply or change-only update
Map displaying OS MasterMap Imagery Layer

OS MasterMap Imagery Layer

View product details