Pt. 914.9m (SH 659 585) – Welsh Highland
Sub addition
There has been an addition to the listing of the Welsh Highlands – Uchafion Cymru, with the summit height, bwlch height and
their locations, the drop and status of the hill derived from a Trimble GeoXH
6000 survey conducted by Aled Williams.
%20-%20hill.JPG) |
Pt. 914.9m (SH 659 585). Photo: Aled Williams |
The criteria for the list that this addition applies to are:
 |
Welsh Highlands - Uchafion Cymru by Aled Williams and Myrddyn Phillips |
The hill is being listed by the point (Pt. 914.9m)
notation, and it is adjoined to the Glyder Fawr group of hills, which are situated in the north-western part of
North Wales (Region A, Sub-Region A1), and
it is positioned with the A5 road to its north and the A4086 road to its south,
and has the village of Capel Curig towards the east.
%20-%201%2025000.jpg) |
Extract from the Ordnance Survey 1:25,000 Explorer map |
When the initial P10 sub list was completed in June 2020 this
hill was listed with 9.4m of drop, based on a 31ft basic levelling survey
conducted by Myrddyn Phillips on the 02.05.99.
%20-%20summit%20survey.JPG) |
Gathering data at the summit of Pt. 914.9m (SH 659 585). Photo: Aled Williams |
The hill was
subsequently analysed via LIDAR by Aled Williams, resulting in a 913.9m summit height and a 905.1m bwlch
height, with these values giving this hill 8.8m of drop, which was insufficient
for it to be classified as a Welsh Highland Sub. However, with the drop value relatively close
to the qualifying criterion of 10m this hill was prioritised for a survey with
the Trimble GeoXH 6000.
%20-%20bwlch%20survey.JPG) |
Gathering data at the bwlch of Pt. 914.9m (SH 659 585). Photo: Aled Williams |
Therefore, the addition of this hill to Welsh
Highland Sub status is due to a Trimble GeoXH 6000 survey, resulting in a 914.9m
summit height and a 904.4m bwlch height, with these values giving this hill 10.5m
of drop, which is sufficient for it to be classifie as a Welsh Highland Sub.
The full details for the hill are:
Group: Glyder Fawr
Name: Pt. 914.9m
OS 1:50,000 map: 115
Summit Height: 914.9m (converted
to OSGM15, Trimble GeoXH 6000)
Summit Grid Reference:
SH 65981 58563 (Trimble GeoXH 6000)
Bwlch Height: 904.4m (converted
to OSGM15, Trimble GeoXH 6000)
Bwlch Grid Reference:
SH 65982 58556 (Trimble GeoXH 6000)
Drop: 10.5m (Trimble
GeoXH 6000)
For the additions, deletions and reclassifications to the Welsh Highlands – Uchafion Cymru
reported on Mapping Mountains please consult the following Change Registers:
Welsh Highland P15s
Welsh Highland Subs
Aled Williams and Myrddyn Phillips (November 2024)
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