Wednesday, 3 August 2016

Mapping Mountains – Significant Name Changes – Y Pedwarau

Mynydd Coch (SH 804 099)

There has been a Significant Name Change to a hill that appears in the Y Pedwarau, and the following details are in respect of a hill that was surveyed with the Trimble GeoXH 6000 on the 13th May 2015.

The criteria for the list that this name change affects are:

Y Pedwarau These are the Welsh hills at and above 400m and below 500m in height that have 30m minimum drop.  The list is co-authored by Myrddyn Phillips and Aled Williams, and the introduction to the Mapping Mountains publication of this list appeared on the 30th January 2017.

The hill is adjoined to the Aran group of hills which is situated in the south-western part of north Wales.  The hill is positioned between the small communities of Aberllefenni to its west and Aberangell to its east and is enclosed by the Dyfi Forest to its north, south and east.

Mynydd Coch (SH 804 099)

The hill appeared in the 400m P30 list on Geoff Crowder’s website under the name Mynydd Cwmcelli.  The name of Mynydd Cwmcelli appears on the Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map approximately 1 km west north-westward from this hill’s summit and is consistently placed on Ordnance Survey maps applicable to a 408m map heighted hill whose summit is positioned at SH 795 101. 

Mynydd Cwmcelli
    Marilyn. Clem/Yeaman. Trig pillar. aka Craig-goch.

During my early hill listing I used the map name that appeared closest to the summit of the listed hill or which seemed most appropriate for the hill, without due consideration for its positional value, doing so can perpetuate the use of inappropriate names.  As the 408m map heighted hill seemed of little consequence and was not then listed the use of its name for another hill did not seem inappropriate.  This is not a practice that I now advocate as with research either conducted locally or historically a more appropriate name for the hill can usually be found.

Since publication of these P30 lists on Geoff Crowder’s website there have been a number of Ordnance Survey maps made available online, some of these are historical such as the series of Six-Inch maps on the National Library of Scotland website, whilst others are current and digitally updated such as the enlarged map on the Geograph website.  One of the historical maps now available is the Ordnance Survey Draft Surveyors map which formed the basis for the first publicly available Ordnance Survey One-Inch ‘Old Series’ map.  In the case of this hill it was Aled Williams who conducted extensive research and studied the Draft Surveyors map in conjunction with other maps relating to land boundaries that necessitated the change in this hill’s listed name.

Extract from the Ordnance Survey Draft Surveyors map

The name this hill is now listed by in Y Pedwarau is Mynydd Coch, and this was derived from the Ordnance Survey Draft Surveyors map.

The full details for the hill are:

Group:  Aran

Name:  Mynydd Coch

Previously Listed Name:  Mynydd Cwmcelli 

Summit Height:  468.3m (converted to OSGM15)

OS 1:50,000 map:  124, 125

Summit Grid Reference:  SH 80458 09952 
Drop:  156m

Myrddyn Phillips and Aled Williams (August 2016)

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