'Glendasan River (Glendalough h)' : Bullaun Stone

TownlandGlendasan River
CountyWicklow
Grid RefT 123 969
GPST 12309 96931 (8m)
Longitude6° 19' 35.42" W
Latitude53° 0' 40.81" N
ITM east480366
ITM north584435
Nearest TownLaragh (2 Km)
OS Sheet56
UTM zone29U
UTM x449041
UTM y5761192

This is a subsite of:

Glendalough - Visitor Centre
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Visit Notes

Sunday, 1st April 2007

What a whopper! The basin in this stone is massive; at least 40cm across. It is relatively shallow, just 10-15cm or so. It's actually difficult to be sure as the stone is in the middle of the river.

The boulder that the basin is cut in seems to have been tipped over, possibly by the large stone that stands behind it being washed down the river after a storm. This means that the bullaun is in a now vertical face and looks really odd.

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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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