Mapping city, town and country since 1824: the Ordnance Survey in Ireland - RIA Library/IHTA Lunchtime Lectures
Lecture on the genesis and thrust of the great 6" Survey of Ireland by the Ordnance Survey: the maps, memoirs, letters and technical innovations which resulted. The subsequent applications of the maps for Griffith's Valuation, electoral boundary maps and other surveys; the heritage for academic research.
Prof. William Smith, MRIA 'The OS 6" mapping project: political and cultural agendas' 1-10-2014
1. Royal Irish Academy
Lunchtime Lectures
1 October 2014
The Ordnance Survey Six-Inch
Mapping Project: Political and
Cultural Agendas
2. Benchmarks :
1791 – Foundations of the O.S. in Britain.
1820 (to 1846) – Col. Thomas Colby appointed head of the O.S.
1824 – Decision to map the whole of Ireland at very large 6’’ scale; Colby
begins triangulation in the summer of 1825.
1825 – Separate Boundary Commission formed, led by Richard Griffith.
1828 (to 1846) – Lieut. (later Capt.) Thomas A Larcom in charge of O.S.
Headquarters in Ireland (Mountjoy House, Phoenix Park).
1830 – He establishes Topographical Department under George Petrie with
John O’Donovan, Eugene O’Curry, et.al.,
1830-31 – Revision of earliest surveyed counties required.
1833-46 – Publication of first edition six-inch maps for each county, from
Londonderry (1833) to Kerry (1846).
1837 – First (and only) County Memoir published.
1846 – Griffith’s Tenement Valuation begun.
1846(May) – Larcom removed from the O.S.
1846(Nov.) – Major-General Colby steps down as head of O.S.
{See Andrews(NB), Hewitt, Doherty, et.al.,}
3. Thomas Spring Rice: Liberal MP from
Limerick, in favour of reforms – including
Catholic Emancipation – in Ireland. Chair of
1824 Select Committee on Survey of
Ireland. Later Chancellor of the Exchequer
and involved in demise of Memoir.