THIS HILL HAS SUBSEQUENTLY BEEN
REINSTATED TO PEDWAR STATUS
Esgair Wen (SN 807 664) - Pedwar reclassified to 400m Sub-Pedwar
There has been a reclassification to the listing of the Y Pedwarau with a Pedwar being reclassified to the ranks of 400m Sub-Pedwar by analysis of LIDAR data by Aled Williams. The 400m
Sub-Pedwarau is one of five categories of sub hills that accompany the main
Y Pedwarau list, with the criteria
for 400m Sub-Pedwar status being all
Welsh hills at or above 400m and below 500m in height with 20m or more and
below 30m of drop.
The hill is situated in the Elenydd group of hills which is one of the wildest hill ranges in
Wales, with its Cardinal Hill being Drygarn
Fawr (SN 862 584) and is placed in the Region of Mid and West Wales (Region
B, Sub-Region B2). The hill is
positioned between the Claerwen Reservoir
to its east and Llyn Egnant to its west
north-west, with any town of size a long way away.
Whatever way one approaches, it is relatively
remote for a Welsh hill with access from the north-west probably being the
easiest with a track heading due south leaving the end of the minor paved road
that culminates to the north of Llyn
Egnant. It is approximately 2km from
this track to the summit of the hill, and although not great in distance the underfoot
conditions are prone to be rough.
The name of the hill is Esgair Wen and prior to the analysis of LIDAR data and its
subsequent listing as a 400m Sub-Pedwar
it had been listed as a Pedwar with
31m of drop based on its 496m Ordnance Survey 1:50,000 Landranger and 1:25,000
Explorer summit spot height and the 465m bwlch spot height that appears on the
Ordnance Survey enlarged map hosted on the Geograph website.
As Aled was analysing other hills in the vicinity
against LIDAR data, he did likewise with Esgair
Wen. LIDAR (Light Detection & Ranging) is
highly accurate height data that is now freely available for much of England
and Wales.
Aled’s analysis of LIDAR data gives the hill the
following details:
Esgair Wen
Summit Height: 494.6m
Summit Height: 494.6m
Summit Grid Reference: SN 80767 66481
Bwlch Height: 464.7m
Bwlch Grid Reference: SN 80121 66300
Drop: 29.9m
Therefore, the 494.6m LIDAR data produced for the summit
position at SN 80767 66481 and the 464.7m LIDAR data
produced for the bwlch position at SN 80121 66300 is insufficient for this hill
to retain its Pedwar status, and therefore it is reclassified to a 400m Sub-Pedwar with 29.9m of drop, and the
list of the Y Pedwarau will be updated
accordingly.
The full details for the hill are:
Cardinal Hill: Drygarn
Fawr
Summit Height: 494.6m
(LIDAR data)
Name: Esgair Wen
OS 1:50,000 map: 135,
136, 147
Summit Grid Reference:
SN 80767 66481
Drop: 29.9m (LIDAR
data)
This now brings the overall total for Y Pedwarau to 445 hills with seven additions, and nine reclassifications
to 400m Sub-Pedwar status since
publication of the list by Europeaklist in May 2013. The hill will be taken out of the Pedwar list and added to the 400m Sub-Pedwar list in forthcoming
publications. The list of Pedwar hills is available from the
Haroldstreet website (January 2014) with all subsequent changes available via
the Mapping Mountains site,
The list of additions and reclassifications from the Pedwar list since the 1st
edition of Y Pedwarau was published
by Europeaklist are as follows:
PEDWAR ADDITIONS
Pt. 499.5m (converted to OSGM15) (SH 665 310) 400m Sub-Pedwar reclassified to Pedwar with 30.3m drop
PEDWAR RECLASSIFICATIONS
Pt. 422.3m (converted to OSGM15) (SO 073 822) Pedwar reclassified to 400m Sub-Pedwar with 29.0m drop
Pt. 407.7m (converted to OSGM15) (SO 180 692) Pedwar reclassified to 400m Sub-Pedwar with 28.3m drop
Esgair Wen (LIDAR data) (SN 807 664) Pedwar reclassified to
400m Sub-Pedwar with 29.9m drop
Myrddyn Phillips and Aled Williams (March 2017)
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