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

Mynydd Pen Lan (SH 783 090) 

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 detail on contemporary maps produced from Ordnance Survey data. 

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, and the Introduction to the Mapping Mountains publication of the list appearing on the 1^st January 2022. 

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

The hill is adjoined to the Aran Fawddwy group of hills, which are situated in the south-western part of North Wales (Region A, Sub-Region A3), and it is positioned with minor roads to its north and west, the A487 road farther to its west and the A470 road to its east, and has the village of Aberllefenni towards the north-west. 

The hill that was prioritised as the P30 appeared in the original Welsh 300m P30 list on Geoff Crowder’s v-g.me website, under the transposed name of Ffridd Maes-mawr, which is a prominent name that appears near the summit of this hill on contemporary Ordnance Survey 1:25,000 Explorer maps.

Ffridd Maes-mawr

371m

SH782092

124

23/215

375m on 1984 1:50000 map at GR784091

 

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, with the previously listed name of Ffridd Maes-mawr applicable to land that does not take in the summit of this hill. 

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

This is not a practice that I now advocate as with time and inclination place-name data can be improved either by asking local people or by examining historic documents, through this form of research an appropriate name for the hill can usually be found. 

Extract from the Ordnance Survey 1:50,000 Landranger map

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 Mynydd Pen Lan stretching the length of the ridge taking in this hill, with this name also appearing in a similar position on the Ordnance Survey 1:50,000 Landranger map. 

Extract from the Ordnance Survey series of Six-Inch maps

Therefore, the name this hill is now listed by in the Y Trichant – The 300m Hills of Wales is Mynydd Pen Lan, and this was derived from the contemporary Ordnance Survey 1:50,000 Landranger map with the name placement substantiated by the Ordnance Survey series of Six-Inch maps. 

 

The full details for the hill are: 

Group:  Aran Fawddwy 

Name:  Mynydd Pen Lan 

Previously Listed Name:  Ffridd Maes-mawr 

OS 1:50,000 map:  124

Summit Height:  375m (spot height)                                                           

Summit Grid Reference:  SH 78343 09027 (hand-held GPS via DoBIH) 

Bwlch Height:  c 338m (interpolation) 

Bwlch Grid Reference:  SH 78157 08694 (interpolation) 

Drop:  c 37m (spot height summit and interpolated bwlch) 

 

Myrddyn Phillips (February 2022)

 

  

Mapping Mountains – Hill Reclassifications – Y Trichant – The 300m Hills of Wales

 

Mynydd Pen Lan (SH 783 090) – Trichant addition

There has been an addition based on confirmation of the higher summit position to the list of 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 detail on contemporary maps produced from Ordnance Survey data. 

The criteria for the list that this addition 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, and the Introduction to the Mapping Mountains publication of the list appearing on the 1^st January 2022. 

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

The name the hill is listed by is Mynydd Pen Lan, and it is adjoined to the Aran Fawddwy group of hills, which are situated in the south-western part of North Wales (Region A, Sub-Region A3), and it is positioned with minor roads to its north and west, the A487 road farther to its west and the A470 road to its east, and has the village of Aberllefenni 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 not included in the main P30 category, with the prioritised P30 status allocated to the 371m map heighted hill positioned at SH 781 091 with an accompanying note stating; 375m on 1984 1:50,000 map at GR784091. 

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

After the sub list was standardised, and interpolated heights and drop values also included the details for this hill were re-evaluated with the prioritised summit relocated and it was listed with an estimated c 39m of drop, based on the 375m summit spot height that appears on the Ordnance Survey 1:50,000 Landranger map and an estimated c 336m bwlch height, based on interpolation of 10m contouring between 330m – 340m that appear on the Ordnance Survey 1:25,000 Explorer map. 

Extract from the Ordnance Survey 1:50,000 Landranger map

Since the original publication of the Welsh P30 lists on Geoff Crowder’s v-g.me website there have been a number of 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 were digitally updated such as the Ordnance Survey Vector Map Local that was hosted on the Geograph website and which was entitled the Interactive Coverage Map, whilst others are current such as the interactive mapping on the Magic Maps and WalkLakes websites. 

One of the resources recently available online is the mapping on the OS Maps website and the details for this hill were subsequently re-assessed against this mapping.  This is the replacement for OS Get-a-map and until recent times had contours at 5m intervals which were proving consistently more accurate compared to the 5m contours that sometimes appear on the Ordnance Survey 1:25,000 Explorer map and used to appear on the online Vector Map Local.  This mapping had bwlch contouring between 335m – 340m, with interpolation placing the height of the bwlch as an estimated c 338m. 

Therefore, the addition of this hill to Trichant status is due to detail on contemporary maps produced from Ordnance Survey data confirming the adjacent hill positioned at SH 781 091 as lower, resulting in a 375m summit height and an estimated c 338m bwlch height, with these values giving this hill an estimated c 37m of drop, which is sufficient for it to be classified as a Trichant. 

 

The full details for the hill are: 

Group:  Aran Fawddwy 

Name:  Mynydd Pen Lan 

OS 1:50,000 map:  124

Summit Height:  375m (spot height)                                                           

Summit Grid Reference:  SH 78343 09027 (hand-held GPS via DoBIH) 

Bwlch Height:  c 338m (interpolation) 

Bwlch Grid Reference:  SH 78157 08694 (interpolation) 

Drop:  c 37m (spot height summit and interpolated bwlch) 

 

Myrddyn Phillips (February 2022)

 

 

 

Mapping Mountains – Hill Reclassifications – Y Trichant – The 300m Hills of Wales

 

Mynydd Pen Lan (SH 792 088) – Sub-Trichant addition

There has been an addition to the list of 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 detail on contemporary maps produced from Ordnance Survey data. 

The criteria for the list that this addition 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, and the Introduction to the Mapping Mountains publication of the list appearing on the 1^st January 2022. 

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

The name the hill is listed by is Mynydd Pen Lan, and it is adjoined to the Aran Fawddwy group of hills, which are situated in the south-western part of North Wales (Region A, Sub-Region A3), and it is positioned with minor roads to its north and west, the A487 road farther to its west and the A470 road to its east, and has the village of Aberllefenni towards the west 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 not included in the Hills to be surveyed sub list, as it was considered not to meet the criteria then used for this sub category. 

After the sub list was standardised, and interpolated heights and drop values also included the details for this hill were re-evaluated and it was listed with an estimated c 22m of drop, based on an estimated c 385m summit height and an estimated c 363m bwlch height, with both heights based on interpolation of 10m contouring that appear on the Ordnance Survey 1:25,000 Explorer map. 

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

Since the original publication of the Welsh P30 lists on Geoff Crowder’s v-g.me website there have been a number of 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 were digitally updated such as the Ordnance Survey Vector Map Local that was hosted on the Geograph website and which was entitled the Interactive Coverage Map, whilst others are current such as the interactive mapping on the Magic Maps and WalkLakes websites. 

One of the mapping resources now available online is the Magic Maps website which hosts an interactive map originated from Ordnance Survey data.  This mapping has many spot heights not on other publicly available maps and for this hill it has a 385m summit spot height. 

Extract from the Magic Maps website

Therefore, the addition of this hill to Sub-Trichant status is due to detail on contemporary maps produced from Ordnance Survey data, resulting in a 385m summit height and an estimated c 363m bwlch height, with these values giving this hill an estimated c 22m of drop, which is sufficient for it to be classified as a Sub-Trichant. 

 

The full details for the hill are: 

Group:  Aran Fawddwy 

Name:  Mynydd Pen Lan 

OS 1:50,000 map:  124

Summit Height:  385m (spot height)                                                           

Summit Grid Reference:  SH 79211 08819 (spot height) 

Bwlch Height:  c 363m (interpolation) 

Bwlch Grid Reference:  SH 79419 09121 (interpolation) 

Drop:  c 22m (spot height summit and interpolated bwlch) 

 

Myrddyn Phillips (February 2022)