Magheraghanrush : Stone Fort

Grid RefG 750 366
GPSG 75031 36551 (3m)
Longitude8° 23' 0.07" W
Latitude54° 16' 37.48" N
ITM east480366
ITM north584435
Nearest TownSligo (5.8 Km)
OS Sheets16, 25
UTM zone29U
UTM x449041
UTM y5761192

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Magheraghanrush - Souterrain
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Visit Notes

Tuesday, 30th December 2008

This is a most unusual cashel as it has three concentric walls. The middle one is the main one and still stands to about 1m high on the east side. The outer one is more like a rath bank and the inner one is rather scrappy. The main wall is about 25m in diameter.

The site is on a south-facing slope with views to the Slieve Dargan mountains. to the west you can see a fine lough. Through the hazy skies I could just see that Knocknarea is visible from here.

Within the cashel there a house platform within which there is a souterrain (see sub-site).

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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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