Ballymore Lower : Portal Tomb

CountyDonegal
Grid RefC 050 347
GPSC 05021 34739 (8m)
Longitude7° 55' 16.39" W
Latitude55° 9' 35.23" N
ITM east480366
ITM north584435
Nearest TownCreeslough (4 Km)
OS Sheet2
UTM zone29U
UTM x449041
UTM y5761192
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Visit Notes

Sunday, 13th March 2005

This tomb is very ruined and is not really classifiable, but the slabs that remain do hold similarities to other portal tombs in the area, so I'm using that as a guide.

The monument is located on the top of a little knoll not far from the road, but can not be seen from there due to a fairly high wall. Just two large slabs remain one of which lies across a couple of other stones, which may or may not have been part of the structure.

Two stones place either side of a gallery, opposite each other, but not touching so as to leave a gap, that are used to segment it into smaller chambers.

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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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