prof. william smith, mria 'the os 6" mapping project: political and cultural agendas'...
TRANSCRIPT
Royal Irish Academy Lunchtime Lectures1 October 2014
The Ordnance Survey Six-Inch Mapping Project: Political and Cultural Agendas
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.,}
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.
Thomas Colby
Richard Griffith 1784-1878
The Principal Triangulation of Ireland.
Districts and district offices of the 6-inch detail survey
All numbered figures from J H Andrews (A Paper Landscape)
State of the 6-inch detail survey, 1830
1829 1832 1857
Need for revisions
Monaghan, part of 6’’ sheet 19, 1835-36
Part of 6’’ sheet 26 Co. Londonderry
Survey dates of completed 1st edition 6-inch sheets
Thomas Larcom
From G M Doherty
Eugene O’Curry
from G M Doherty
Fieldwork for the Memoir Series 1830-1840
From G M Doherty
Clogheen – Burncourt before and after Famine
Civil Parishes as surveyed and mapped by the Ordnance
Survey
Of Children under 5 yrs 1841 - 1851