Tuesday, 7 July 2015

Mapping Mountains – Summit Relocations – Y Pedwarau

Moel Eglwys (SH 905 479)  

There has been a Summit Relocation to the Y Pedwarau list initiated by a survey with the Trimble GeoXH 6000.  The Y Pedwarau are the Welsh 400m hills that have a minimum of 30m of drop.  With the following details being retrospective as the Trimble survey that resulted in this summit relocation was conducted on 27th September 2014.

The survey was conducted in the hills to the west of the small town of Cerrigydrudion which is situated just to the north-east of the A5.  This was one of five hills visited with Aled Williams during a day when we did three separate walks.

The hill is listed as a Pedwar and is named Moel Eglwys, its summit position was listed at SH 905 478 as this is where its 448m summit spot height appears on current Ordnance Survey maps.  This position was surveyed using the Trimble, as was another position to its north.

The position of the relocated summit is at SH 90580 47962 and is the top of featureless ground, this position is not given a spot height on current Ordnance Survey maps but the Trimble GeoXH 6000 result gave it as 0.15m higher and approximately 65 metres northward from where the 448m spot height is positioned on the ground.

The full details for the hill are:

Cardinal Hill:  Arenig Fach

Summit Height:  447.6m (converted to OSGM15)

Name:  Moel Eglwys

OS 1:50,000 map:  116

Summit Grid Reference (New Position):  SH 90580 47962 
Drop:  c 36m

The Trimble GeoXH 6000 set-up position at the new summit position of Moel Eglwys, with the old position for the summit in the background just beyond the cairn and fence

For details on the survey that relocated the summit of this hill please click {here}

Myrddyn Phillips and Aled Williams (September 2014)

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