Leitrim : Portal Tomb

Grid RefH 225 800
Longitude7° 39' 4.49" W
Latitude54° 40' 3.17" N
ITM east480366
ITM north584435
Nearest TownCastlederg (5.8 Km)
OS Sheet12
UTM zone29U
UTM x449041
UTM y5761192
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Visit Notes

Monday, 4th August 2003

This has to be among the best looking capstones around. The huge flat fronted wedge shaped stone has a massive lump of quartz projecting from its flat front, like some mystical eye. You cannot help but feel watched as you approach.

The chamber is about 1m wide by 1.5m long and just 75cm high. Two beautifully matched, pointed portal stones finish off this really good specimen. It may not be the biggest, but it is thoroughly lovely.

A very low wall has been erected so that it coincides with the back of the chamber. This gives the impression that the rear of the capstone actually rests on the wall, but there is actually a small backstone.

Ease of access adds to all the other factors that make this a must see site.

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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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