Carncorran Glebe : Portal Tomb

Grid RefH 288 824
Longitude7° 33' 12.11" W
Latitude54° 41' 19.64" N
ITM east480366
ITM north584435
Nearest TownCastlederg (3.3 Km)
OS Sheet12
UTM zone29U
UTM x449041
UTM y5761192
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Visit Notes

Monday, 4th August 2003

A quick glimpse of this, set in a hedge row, set on the false brow of a low hill, tantalises you from the road. Access seems tricky, but turns out to be straight forward.

Two massive portal stones with a tiny doorstone is all that remains of this tomb now. A few large stones dotted along the wall are possibly from it too, but none seem large enough.

The portal stones are nearly 3m tall and totally different rom each other. One is a slab and the other a bold fat stone.

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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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