Catalogues of Ordnance Survey Maps in the National Library
A Summary Map Catalogue containing a general listing of the National Library map collections, including those early Ordnance Survey maps held by the Library, is available at the counter in both the Main Reading Room and Manuscripts Reading Room, and here as PDF file:
Summary Map Catalogue NLI_SummaryMapCatalogue.pdf (0.08 MB, Adobe PDF)
All maps processed in the OSI map conservation project are individually listed with full survey, publication and revision details for each sheet. These can be accessed in the National Library strictly by appointment with the Prints and Drawings Department. Alternatively these maps may be viewed online in the Library's Online Services Room http://osi.ie
Ordnance Survey Publication Catalogues
Although established in 1824, The Ordnance Survey did not begin publishing its own catalogues and monthly supplements until the 1850s. These are available at the desk in the main Reading Room.
Finding the OS Map you need
In order to consult an Ordnance Survey map for a particular county you must first identify the relevant Ordnance Survey sheet number. Details of how to identify the sheet number relevant to your research are available here:
Finding the OSI Map You Need FindingOSIMaps.pdf (0.01 MB, Adobe PDF)
Other Printed Maps
The map index in the Main Reading Room includes entries for important maps which have appeared in books and periodicals relating to Ireland. The map index is arranged by place and by cartographer and specifies the location of individual maps. This index also lists manuscript and early printed maps, including large scale Ordnance Survey maps, which were catalogued prior to 1990.