Knockanaffrin : Stone Circle

Grid RefS 266 142
GPSS 26575 14158 (7m)
Longitude7° 36' 38.12" W
Latitude52° 16' 42.86" N
ITM east480366
ITM north584435
Nearest TownClonmel (10.9 Km)
OS Sheet75
UTM zone29U
UTM x449041
UTM y5761192
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Visit Notes

Sunday, 28th January 2007

This is indeed a new stone circle. It is not mentioned in Moore's survey of these hills. The remains are tricky to see, but several factors point to its authenticity. Firstly it is in its own little field: someone at some time made sure it was safe by giving is its own walled in area.

Luckily one of the visible stones is the axial stone, which is nicely on the northeast side of the circle. This means the axis is northeast-southwest - a classic alignment for an axial stone circle.

The other 7 or so visible stones describe a circle about 15m in diameter. It stands on a small shelf at the base of a rough southwest facing slope. This means all the views are directed towards the southwest and west towards the Knockmealdown Mountains.

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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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