Knocktemple : Bullaun Stone

Grid RefO 205 027
GPSO 20542 02667 (4m)
Longitude6° 12' 6.29" W
Latitude53° 3' 39.84" N
ITM east480366
ITM north584435
Nearest TownRoundwood (1.6 Km)
OS Sheet56
UTM zone29U
UTM x449041
UTM y5761192
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Visit Notes

Sunday, 9th March 2008

This bullaun stone is now in the shallows of Vantry Reservoir, just south of Roundwood. It is only 200m from the other Knocktemple bullaun stone (see Knocktemple (County Wicklow)) and would have been alongside the stream that runs near to the latter.

Like the other Knocktemple bullaun this has a single bullaun/basin. The 25cm diameter bullaun is set towards one end of the stone's flat surface.

To see the stone properly a pair of wellington boots is needed, especially when the reservoir's water level is quite high. Care should be taken whilst wading to it, because the reservoir bottom here is simply exposed rock with many jagged edges.

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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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