Half-inch map of Northern Ireland and Half-inch map (Second series). Northern Ireland
Cartographic Mathematical Data:
Scale 1:126,720 (W 9⁰5ʹ--W 5⁰25ʹ/N 55⁰25ʹ--N 54⁰00ʹ).
Relief shown by contours, spot heights, and gradient tints. Depths shown by bathymetric isolines., "Topography based on 1ʺ Third Series, which was revised 1953-1962 (Northern Ireland only).", "The inclusion of the Republic of Ireland is by permission of the Minister of Finance of the Republic of Ireland.", Index map in bottom margin of each sheet., and "The Irish Grid."