Friday, 17 July 2015

Mapping Mountains – Summit Relocations – Y Pedwarau

Little Hill (SO 171 537)

There has been a Summit Relocation initiated by a survey with the Trimble GeoXH 6000 to the listing of the Y Pedwarau, with the survey that resulted in the following details taking place on 9th July 2015.  Y Pedwarau is the list of the 400m hills of Wales that have 30m minimum of drop.

The survey was conducted in hills of Fforest Glud, during a walk in the company of Nicola Morris who spent much of the time operating the Trimble and lazing in the sunshine.  The hill is situated to the east of the small community of Hundred House and to the west south-west of Gladestry in the heartland of the beautiful and quiet hills of Radnorshire.

The hill is listed as a Pedwar with its summit position previously given as SO 172 537 which is the position of the 469m spot height that appears on current Ordnance Survey maps.  However, this hill has another high point which is approximately 100 metres west from where the 469m spot height appears on the ground.  Both positions were surveyed with the Trimble data giving the westerly position as 0.2m higher.

The position of the relocated summit is at SO 17175 53749 and is the top of featureless ground that mainly consists of bilberry, this position is not given a spot height on current Ordnance Survey maps but the Trimble result gave it as 0.2m higher when compared to the high point of its adjacent featureless top.

The full details for the hill are:

Cardinal Hill:  Gwaun Ceste

Summit Height:  469.2m (converted to OSGM15)

Name:  Little Hill

OS 1:50,000 map:  148

Summit Grid Reference (New Position):  SO 17175 53749 
Drop:  46.4m (converted to OSGM15)

The Trimble GeoXH 6000 gathering data at the new summit position of Little Hill, with the old position of the summit just on the left of centre in the background of this photo

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

Myrddyn Phillips and Aled Williams (July 2015)

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