Baseline

The late Sean McMahon gives us an overview of the work done here by Thomas Colby in the 1820s and how it served as the inspiration for arguably the most important Irish play of the last 50 years, Translations by Brian Friel. Photo: author's own looking over to Magilligan Point where the baseline is - The Point Bar being to the immediate left of the pier.

https://www.tailte.ie/en/surveying/about-surveying/history/ordnance-survey-pioneers/