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出版Ordnance Survey, 1994-05-31
ISBN18738193239781873819326
URLhttp://books.google.com.hk/books?id=Nu1MPgAACAAJ&hl=&source=gbs_api
註釋Ordnance Survey of Northern Ireland (OSNI) has replaced its One-Inch maps with a completely new series at 1:50,000 scale, approximately 1.25 inches to one mile. The series is numbered on an all-Ireland basis and OSNI is responsible for the design and publication of the sheets that cover Northern Ireland and adjoining parts of the Republic of Ireland. The layout incorporates a number of overlaps. The map is derived from the latest large scale material, supplemented by aerial photographs and ground surveys.