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Ordnance Survey in Ireland & NI

OSNI
Ordnance Survey of Northern Ireland covers Northern Ireland
View OSNI mapping on-line

OSI
Ordnance Survey of Ireland covers the Irish Republic
View OSI mapping on-line


Short Histories by Dr. Richard Oliver

Ireland within the United Kingdom : 1824-1922

The Free State and the Irish Republic : 1922 to date

Northern Ireland : 1922 to date

See OSI website for more information about Ordnance Survey Ireland
See OSNI website for more information about Ordnance Survey of Northern Ireland (Now part of Land and Property Services)