'Downpatrick Head II' : Barrow

TownlandDownpatrick Head
CountyMayo
Grid RefG 125 428
GPSG 12486 42771 (3m)
Longitude9° 20' 42.91" W
Latitude54° 19' 33.86" N
ITM east480366
ITM north584435
Nearest TownBallycastle (5.6 Km)
OS Sheet23
UTM zone29U
UTM x449041
UTM y5761192
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Visit Notes

Saturday, 21st August 2010

This barrow is very like the one just a few meters away. It is about 10m in diameter and the central mound is only about 40cm high.

See my nots on the other barrow for a bit of horrible local history (see Downpatrick Head I (County Mayo)).

Click Thumbnail to View Full Size Image

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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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