'Grania's Cave' : Portal Tomb

Grid RefH 555 643
Longitude7° 8' 33.92" W
Latitude54° 31' 26.26" N
ITM east480366
ITM north584435
Nearest TownClogher (12.5 Km)
OS Sheet18
UTM zone29U
UTM x449041
UTM y5761192
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Visit Notes

Sunday, 8th June 2003

As I got to the track that leads down towards this tomb two tractors were driving up it towards me. So, I waited and hailed the driver of the first (the farmer) and asked about the tomb. He really didn't like the look of me or just plain thought I was mad for wanting to look at a pile of old stones ... I don't know which. Eventually, he gave me directions and permission to visit the tomb.

As you approach across the field you cannot see the tomb until the last minute, bacuase it sits in a little dip. It is also very ruined and so not very tall, which doesn't help. A few stones define a chamber and what may be a slipped roofstone lies to one side.

A curious monument. Not a lot to see, but what does remain is most odd.

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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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