Knockshanbrittas : Wedge Tomb

CountyTipperary
Grid RefR 877 574
Longitude8° 10' 54.59" W
Latitude52° 40' 3.76" N
ITM east480366
ITM north584435
Nearest TownCappamore (11.8 Km)
OS Sheet66
UTM zone29U
UTM x449041
UTM y5761192

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Knockshanbrittas - Wedge Tomb
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Visit Notes

Sunday, 10th November 2002

A wall has been built around this tomb, but unusually it is transverse to the wall and the (now open) back faces onto the farm track, while the closed front is in the adjoining field. There is evidence of a small portico to the front, where the side stones jut out in front of the septal slab that forms the door. The tomb is NE/SW aligned with the entrance at the southwest.

The gallery is very interesting because not only does it retain its roof, but the slabs forming the northernmost wall are considerably lower than those on the south, meaning there is extensive use of chock stones to make the roof level.

A slab of rock used as to divide a gallery into smaller chambers. Unlike sill stones they are the same height as the gallery and unlike jambs they are full width, thus blocking the appeture completely.

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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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