Mapping Mountains – Significant Name Changes – Y Trichant – The 300m Hills of Wales

Caergynan Bank (SO 132 710) 

There has been a Significant Name Change to a hill that is listed in the Y Trichant – The 300m Hills of Wales, with the summit height, bwlch height and their locations, the drop and status of the hill derived from LIDAR analysis and a subsequent Trimble GeoXH 6000 survey conducted by Myrddyn Phillips. 

LIDAR image of Caergynan Bank (SO 132 710)

The criteria for the list that this name change applies to are: 

Y Trichant – The 300m Hills of Wales.  Welsh hills at or above 300m and below 400m in height that have 30m minimum drop, with an accompanying sub list entitled the Sub-Trichant with the criteria for this sub category being all Welsh hills at or above 300m and below 400m in height with 20m or more and below 30m of drop.  The list is authored by Myrddyn Phillips, with the Introduction to the list and the renaming of it appearing on Mapping Mountains on the 13^th May 2017. 

Y Trichant - The 300m Hills of Wales by Myrddyn Phillips

The hill is adjoined to the Beacon Hill group of hills, which are situated in Mid and West Wales (Region B, Sub-Region B1), and it is encircled by minor roads with the B4356 road farther to its north, the A483 road farther to its west and the A488 road farther to its south-east, and has the village of Llanbister towards the north-west. 

When the original 300m height band of Welsh P30 hills were published on Geoff Crowder’s v-g.me website this hill was listed under the name of Maelienydd, with an accompanying note stating; aka Caergynan Bank.

Maelienydd

350c

SO133710

136/148

200/214

aka Caergynan Bank

 

During my early hill listing I paid little regard to name placement on the map, or the meaning of names and to what feature the name was appropriately applied to.  Therefore, I prioritised names for listing purposes that I now understand are either inappropriate or where another name is viewed as being more appropriate. 

Extract from the Ordnance Survey series of Six-Inch maps

Since publication of these P30 lists on Geoff Crowder’s v-g.me website there have been a number of Ordnance Survey maps made available online, some of these are historic 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 old Vector Map Local hosted on the Geograph website and which was entitled the Interactive Coverage Map, and the interactive mapping on the Magic Maps and WalkLakes websites, and it is the Ordnance Survey series of Six-Inch maps that give the name of Caergynan Bank as being more appropriate for the hill itself and that of Maelienydd for a much greater area taking in a higher hill.  The detail given on the Ordnance Survey series of Six-Inch maps is also reproduced on the contemporary Ordnance Survey 1:25,000 Explorer map. 

Extract from the Ordnance Survey 1:25,000 Explorer map

Therefore, the name this hill is now listed by in the Y Trichant – The 300m Hills of Wales is Caergynan Bank, and this was derived from the Ordnance Survey series of Six-Inch maps with the detail reproduced on the contemporary Ordnance Survey 1:25,000 Explorer map. 

 

The full details for the hill are: 

Group:  Beacon Hill 

Name:  Caergynan Bank 

Previously Listed Name:  Maelienydd 

OS 1:50,000 map:  136, 148

Summit Height:  349.8m (converted to OSGM15, Trimble GeoXH 6000)                                                           

Summit Grid Reference:  SO 13239 71026 (Trimble GeoXH 6000) 

Bwlch Height:  326.7m (LIDAR) 

Bwlch Grid Reference:  SO 13128 70875 (LIDAR) 

Drop:  23.1m (Trimble GeoXH 6000 summit and LIDAR bwlch) 

 

Myrddyn Phillips (August 2021)