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To
facilitate drainage and other engineering operations,
height points were also included on the finished maps.
Local datums where the heights were fixed to zero were
chosen at different locations around the country, with
the datum for Co. Dublin fixed at the low water mark of
the spring tide on 8th April 1837 at Poolbeg Lighthouse.
Every road and track, every stone wall and hedge, every
river and stream from Fair Head to Mizen Head and from
Howth Head to Slyne Head was surveyed and mapped with a
level of precision never seen before.
The work also involved research into and standardisation
of geographical names, the vast majority of which are
Anglicizations of original names in the Irish language.
Although not originally intended for publication, 33 sheets
of the five foot to one mile plan developed for Dublin
City were swiftly acclaimed after the one covering Dublin
Castle was published in 1840. |
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