Birrinagh : Portal Tomb

Grid RefN 161 879
Longitude7° 45' 19.42" W
Latitude53° 50' 25.1" N
ITM east480366
ITM north584435
Nearest TownDrumlish (2.3 Km)
OS Sheet34
UTM zone29U
UTM x449041
UTM y5761192
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Visit Notes

Sunday, 17th August 2003

This is a lovely tomb with excellently matched portal stones 1.9m high. The doorslab is not quite full height.

A fine back stone stands to a height of 1.5m. The displaced roof stone stands upright against one side, looking at first like a side stone for the chamber, but unless they are very low then none of the side stones are present. The capstone was dislodged only 60 or 70 years ago. It's such a shame that it is no longer in place, because this would then have been a very good looking tomb indeed.

The tomb is now on a modern droveway and is fenced in lightly for protection. This enclosure was full of high weeds on this visit, but I assume that in winter the structure would be fully exposed. I will definitely pop back to check it out.

It is beautifully situated in the bottom of a wide valley with low hills to the east, north and south.

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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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