This map is Sheet I of a 4 sheets all-Ireland series, the other 3 sheets being published by Ordnance Survey of Ireland. A fully-coloured map, it carries the Irish Grid at 10 km intervals. Conceived as a general purpose topographical map, it is aimed primarily at the touring motorist. This sheet covers the whole of Northern Ireland as well as Donegal and parts of Cavan, Leitrim, Louth, Monaghan, Roscommon and Sligo.