Letterdeen : Standing Stone

Grid RefL 647 526
GPSL 64658 52603 (5m)
Longitude10° 2' 24.55" W
Latitude53° 30' 21.53" N
ITM east480366
ITM north584435
Nearest TownClifden (2.3 Km)
OS Sheet37
UTM zone29U
UTM x449041
UTM y5761192
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Visit Notes

Sunday, 18th July 2004

This 1.6m tall granite stone stands on a bit of salt marsh at the east end of Streamstown Bay, just 10m from the water. It is round-topped and squarish in section.

In the centre of the bay is a rounded island called Boolard Island which seems to fill the view. I sat for a while watching a heron (one of my favourite birds) strut through the mud at the water's edge and stab at fish. It's amazing how accurate they are: I think he missed just once in ten attempts.

As I left a group of German or Dutch people came to look at the stone and scared the heron (and me) away.

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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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