Ballygraffan : Portal Tomb
Visit Notes
Sunday, 12th February 2006
When you approach this tomb across the field your hopes are built up that you are about to see a really nice tomb. It is surrounded by a modern low drystone wall and the chunky capstone stands very proud of it. However, when you reach the tomb and look inside the enclosure it is a somewhat defalting experience. Sadly the capstone is simply sitting on top of a pile of rocks not a structure.
The capstone does look like a mini version of the massive capstone at Browne's Hill (County Carlow), though. This would have looked really impressive when it was intact.
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About Coordinates Displayed
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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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