Pt. 430.7m (SO 089 525)
There has been a Summit Relocation to the listing of the Y Pedwarau instigated from a survey with the Trimble GeoXH 6000. The Y Pedwarau takes in all the 400m hills of Wales that have a minimum 30m of drop, and the following details are retrospective as the survey that resulted in this summit relocation was conducted on 25th April 2015.
There has been a Summit Relocation to the listing of the Y Pedwarau instigated from a survey with the Trimble GeoXH 6000. The Y Pedwarau takes in all the 400m hills of Wales that have a minimum 30m of drop, and the following details are retrospective as the survey that resulted in this summit relocation was conducted on 25th April 2015.
The survey with the Trimble was conducted in the Fforest Glud hills to the south-west
of Hundred House, which is a small community to the north-east of
Llanfair-ym-Muallt (Builth Wells) in the heartland of Mid-Wales.
This hill formed part of a circuit around Aberedw
Hill (SO 084 507) in the company of Mark Trengove and Aled Williams who were
visiting hills whilst I scampered ahead to survey them. The culmination of the walk was on the summit
of Aberedw Hill where we met Carole Engel, Anton Ciritis, Alex Cameron and Alan
Greenwood to celebrate Carole’s completion of the Y Pedwarau – The 400m Hills of
Wales.
The hill is listed as a Pedwar and remains unnamed
on current Ordnance Survey maps and as we currently do not know an appropriate name for it either from local enquiry or from historical research it is being listed under the point (Pt. 430.7m) notation.
The summit area of the hill has three small 430m ring contours on Odnance Survey maps, with the furthest easterly one being given a spot height of 432m, and this is where the summit of the hill used to be listed.
The summit area of the hill has three small 430m ring contours on Odnance Survey maps, with the furthest easterly one being given a spot height of 432m, and this is where the summit of the hill used to be listed.
The position of each of these contour rings was
surveyed with the Trimble resulting in:
Summit 1:
429.8m (converted to OSGM15) at SO 09189 52379
Summit 2:
430.7m (converted to OSGM15) at SO 08911 52554
Summit 3:
428.9m (converted to OSGM15) at SO 08099 52175
Summit 1 is where the 432m spot height appears on
current Ordnance Survey maps, but its adjacent summit (Summit 2) was surveyed with the Trimble as being 0.8m higher
The new summit position for this hill is
approximately 320 metres north-westward from where the 432m spot height appears
on the ground.
The full details for the hill are:
Cardinal Hill: Great
Rhos
Summit Height: 430.7m (converted to OSGM15)
Name: Pt. 430.7m
OS 1:50,000 map: 147
Summit Grid Reference (New Position): SO 08911 52554
Drop: 30.1m (converted to OSGM15)
 |
| The Trimble GeoXH 6000 gathering data at the new summit position of Pt. 430.7m, with the old position of the summit in centre background of this photo |
For details on the survey that relocated the summit of this
hill please click {here}
Myrddyn Phillips and Aled Williams (April 2015)
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