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Help and advice for Ordnance Survey Maps

If you have found a problem on this page then please report it on the following form. We will then do our best to fix it. If you are wanting advice then the best place to ask is on the area's specific email lists. All the information that we have is in the web pages, so please do not ask us to supply something that is not there. We are not able to offer a research service.

If you wish to report a problem, or contribute information, then do use the following form to tell us about it. We have a number of people each maintaining different sections of the web site, so it is important to submit information via a link on the relevant page otherwise it is likely to go to the wrong person and may not be acted upon.

Ordnance Survey Maps

  • Historical
    • Map numbers are indicated in the The General Alphabetical Index to Townland & Towns, Parishes, & Baronies of Ireland, Reprint, Genealogical Publishing Co., 1984. LDS Book 941.5 X22g).
      • The map sheet numbers are also shown at the beginning of the Ordnance Survey Memoirs and are numbered sequentially 1,2,3, etc.
    • 1833-1844
    • Circa 1910
    • Griffith's Valuation Maps
      • These are ordnance survey maps on which valuation lot numbers are superimposed. They are used to pin point the location of an ancestor found in Griffith's Valuation. These maps are available from the Valuation Office. Contact information specifiying the county and townland or town of interest.
  • Contemporary
    • Current maps are known as the Discovery Series. They are available from a number of online vendors including the IGSI Bookstore. The map numbers for County Cavan are in the map shown below.
Map Key