Porterstown : Standing Stone

Grid RefN 556 506
Longitude7° 9' 43.18" W
Latitude53° 30' 8.84" N
ITM east480366
ITM north584435
Nearest TownMullingar (12.1 Km)
OS Sheet42
UTM zone29U
UTM x449041
UTM y5761192
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Visit Notes

Sunday, 9th June 2002

Nearly all big stones needs some space around them to allow the visitor a chance to stand back and fully appreciate its presence in the landscape - this is true of smaller stones too but, I find, to a lesser extent. Like so many stones these days some idiot has allowed another idiot to build a dwelling within 10m of this stone, the garden of which is just 5m from it.

Around the base of the stone someone has liberally sprinkled weed killer and recently lit a small fire.

The stone is a little over 2m tall and 1.3m wide, with a depth of 50cm or so and looks to be a shale or mud rock slab. A lovely stone ruined by a lack of respect.

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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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