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A folded paper topographic map from Ordnance Survey of Northern Ireland. These Discoverer maps are at the same scale, and in very similar format to the OSI Discovery maps and, together, the ranges cover the entirety of the Irish landmass. Discoverer maps come with integral card covers. Mapping is the equivalent to Ordnance Survey's Landranger series. Discoverer maps are at a scale of 1:50,000 , are compact enough to fit easily into a jacket pocket and are the best products of their type available.
This version is covered in a tough matt polyester film. The film type used is much stronger than the cheaper polypropylene which are vastly more prone to tearing, peeling and splitting- used by most of its rivals.