OS MasterMap Imagery
Using OS MasterMap Imagery to check road markings, tree canopies or site entrances cuts down the need for site visits, so you can save money and manage time more efficiently. For engineers, for surveyors, for planners, this product is a revelation. With 25cm resolution, it is aligned to OS MasterMap Topo and is incredibly detailed, expertly colour-balanced and corrected for geometric distortions.
OS MasterMap Imagery is an off-the-shelf product for the whole of Great Britain and available in JPEG, TIFF and ECW formats. It is released quarterly in February, May, August and November.