Cahermacnaghten : Stone Fort

Grid RefM 196 002
Longitude9° 11' 56.31" W
Latitude53° 2' 47.2" N
ITM east480366
ITM north584435
Nearest TownLisdoonvarna (6.4 Km)
OS Sheet51
UTM zone29U
UTM x449041
UTM y5761192
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Visit Notes

Saturday, 26th October 2002

This fort has quite some history - dating back to around 500ce. It would have originally been the homestead of a wealthy landowner, but fell into disuse. It was reused again as late as the 15th century when the entrance was rebuilt and a tower built over it. In the 17th century it was the site of O'Davoran's Law School. Evidence of the reuse of the site can be seen inside where the ground level is raised some 2m above the surrounding fields.

The walls are constructed of immensely large blocks of stone, but very ruinous now. Inside you can see where the foundations of the 17th century rectangular house once stood.

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About Coordinates Displayed

This is an explanation of (and a bit of a disclaimer for) the coordinates I provide.

Where a GPS figure is given this is the master for all other coordinates. According to my Garmin these are quite accurate.

Where there is no GPS figure the 6 figure grid reference is master for the others. This may not be very accurate as it could have come from the OS maps and could have been read by eye. Consequently, all other cordinates are going to have inaccuracies.

The calculation of Longitude and Latitude uses an algorithm that is not 100% accurate. The long/lat figures are used as a basis for calculating the UTM & ITM coordinates. Consequently, UTM & ITM coordinates are slightly out.

UTM is a global coordinate system - Universal Transverse Mercator - that is at the core of the GPS system.

ITM is the new coordinate system - Irish Transverse Mercator - that is more accurate and more GPS friendly than the Irish Grid Reference system. This will be used on the next generation of Irish OS maps.

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