Aghaderg : Standing Stone

Grid RefJ 112 415
GPSJ 11071 41543 (15m)
Longitude6° 17' 35.69" W
Latitude54° 18' 37.67" N
ITM east480366
ITM north584435
Nearest TownBanbridge (4.9 Km)
OS Sheet20
UTM zone29U
UTM x449041
UTM y5761192
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Visit Notes

Sunday, 9th January 2005

This 1.5m+ tall stone stands picturesquely overlooking Lough Brickland. It is one of those stones that looks different from every angle. From one side it is triangular, while from the other it has an overhanging section sticking out of one side.

There are many solution pits on various sides, which may once have been cup marks. There is a pretty, tree covered crannog in the lough below.

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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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