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Ordnance Survey 6 Inch Maps, 1842
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How to Access these Maps
Statement of Responsibility
Brief History of OS Maps
OS Place Name Books
Other Sites on the History of the Ordnance Survey
How to Access these Maps
The 1842 Ordnance Survey 6 Inch Maps for Galway are now available online. To view these maps, you will need to download and install an SVG plugin. SVG stands for Scalable Vector Graphics and the maps are in this format. The plugin is available from Adobe - SVG.
Copyright Statement
The digitized maps are the intellectual property of:
Galway and Mayo Institute of Technology
National University of Ireland, Galway
This web application is the copyright of Mr. Rainer Kosbi.
The data on monuments is the copyright of the National Monuments Service
These maps may be used free of charge in publications that are non-commercial. Such a publication must
- contain this copyright statement
- contain a reference to this web site
- state that these maps are available free of charge at this web address.
Use of these maps for commercial purposes will require the purchase of a license and such a license may be acquired by e-mailing us.
Brief History of OS MapsThe Ordnance Survey was established in Britain in 1791; in 1824 the Survey established its Irish headquarters in Dublin.
The Ordnance Survey took its name from the Board of Ordnance, a military organisation, and the field surveys were carried out by men of the Royal Engineers who were based in various barracks around the country. They had to determine the boundaries of over 60,000 townlands and standardise the names of each of them.
The maps were drawn on a scale of 6 inches to one mile and published between 1833 and 1846.
The Public Record Office of Northern Ireland website states
"This massive undertaking ensured that Ireland was surveyed and mapped with a degree of thoroughness and accuracy unique for its time in the world."In addition, the Ireland's Historical Mapping Archive website states
"It was a remarkable feat by remarkable men and the accuracy they attained is still marvelled at today. The process involved both innovation and ingenuity."
OS Place Name Books
John O’Donovan and Eugene Curry assisted in the authentication of local placenames. The results of these investigations are contained in the OS Place Name Books. These record townland names along with Irish names and their translation. The OS Place Name Books for Galway are available online as well as being avalable at Library Headquarters on microfilm.
Other Sites on the History of the Ordnance Survey
Ireland's Historical Mapping Archive
Public Record Office of Northern Ireland - Maps, Plans and Surveys
National Library of Ireland - Collections - Maps and Maps Conservation
Clare County Library - Historical Maps of County Clare: Ordnance Survey 6-Inch Maps, 1842