Mapping Mountains – Hill Reclassifications – Welsh Highlands – Uchafion Cymru

Hen Gerrig (SH 950 187) – 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 LIDAR analysis conducted by Aled Williams.

LIDAR image of Hen Gerrig (SH 950 187)

The criteria for the list that this addition applies to are:

Welsh Highlands – Uchafion Cymru – Welsh hills at or above 500m in height with 15m minimum drop, with an accompanying sub list entitled the Welsh Highland Subs, the criteria for which is all Welsh hills at or above 500m in height with 10m or more and below 15m of drop.  This list is authored by Myrddyn Phillips and Aled Williams with the Introduction to the list published on Mapping Mountains in November 2015 and the latest update relating to the list published on Mapping Mountains in January 2023.

Welsh Highlands - Uchafion Cymru by Myrddyn Phillips and Aled Williams

The name the hill is listed by is Hen Gerrig and it is adjoined to the Esgeiriau Gwynion group of hills, which are situated in the southern part of North Wales (Region A, Sub-Region A3), and it is positioned with the B4343 road to its north-east, minor roads to its west and south south-east and the A458 road to its south, and has the village of Llanwddyn towards the east.

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 an estimated c 9m of drop, based on a 518m summit height taken from the 1698ft (517.6m) height that appears on the Ordnance Survey series of Six-Inch maps, and an estimated c 509m bwlch height, based on interpolation of 5m contouring that appeared online.

Extract from the Ordnance Survey series of Six-Inch maps

However, it was not until LIDAR became available that the details for this hill could be accurately re-assessed.  The LIDAR (Light Detection & Ranging) technique produced highly accurate height data that is now freely available for much of England and Wales. 

Therefore, the addition of this hill to Welsh Highland Sub status is due to LIDAR analysis, resulting in a 518.1m summit height and a 507.9m bwlch height, with these values giving this hill 10.2m of drop, which is sufficient for it to be classified as a Welsh Highland Sub.

The full details for the hill are: 

Group:  Esgeiriau Gwynion

Name:  Hen Gerrig

OS 1:50,000 map:  125

Summit Height:  518.1m (LIDAR)

Summit Grid Reference:  SH 95070 18770 (LIDAR)

Bwlch Height:  507.9m (LIDAR)

Bwlch Grid Reference:  SH 95012 18806 (LIDAR)   

Drop:  10.2m (LIDAR) 

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 (September 2023)

 

 

  

Mapping Mountains – Hill Reclassifications – Welsh Highlands – Uchafion Cymru

Cerrig Duon (SJ 128 384) – Welsh Highland Sub deletion 

There has been a deletion 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 LIDAR analysis conducted by Aled Williams. 

LIDAR image of Cerrig Duon (SJ 128 384)

The criteria for the list that this deletion applies to are:

Welsh Highlands – Uchafion Cymru – Welsh hills at or above 500m in height with 15m minimum drop, with an accompanying sub list entitled the Welsh Highland Subs, the criteria for which is all Welsh hills at or above 500m in height with 10m or more and below 15m of drop.  This list is authored by Myrddyn Phillips and Aled Williams with the Introduction to the list published on Mapping Mountains in November 2015 and the latest update relating to the list published on Mapping Mountains in January 2023.

Welsh Highlands - Uchafion Cymru by Myrddyn Phillips and Aled Williams

The name the hill is listed by is Cerrig Duon and it is adjoined to the Craig Berwyn group of hills, which are situated in the eastern part of North Wales (Region A, Sub-Region A3), and it is positioned with a minor road to its north-east and the A5 road to its north, and has the town of Llangollen towards the east north-east.

When the initial P10 sub list was completed in June 2020 this hill was listed with an estimated c 12m of drop, based on the 551m summit spot height that appears on the Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map and an estimated c 539m bwlch height, based on interpolation of 5m contouring that appeared online. 

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

However, it was not until LIDAR became available that the details for this hill could be accurately re-assessed.  The LIDAR (Light Detection & Ranging) technique produced highly accurate height data that is now freely available for much of England and Wales.

Therefore, the deletion of this hill from Welsh Highland Sub status is due to LIDAR analysis, resulting in a 549.3m summit height and a 540.0m bwlch height, with these values giving this hill 9.3m of drop, which is insufficient for it to be classified as a Welsh Highland Sub. 

 

The full details for the hill are: 

Group:  Craig Berwyn

Name:  Cerrig Duon

OS 1:50,000 map:  125

Summit Height:  549.3m (LIDAR)

Summit Grid Reference:  SJ 12833 38497 (LIDAR)

Bwlch Height:  540.0m (LIDAR)

Bwlch Grid Reference:  SJ 12785 38809 (LIDAR)   

Drop:  9.3m (LIDAR) 

 

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 (September 2023)

 

  

Mapping Mountains – Hill Reclassifications – Welsh Highlands – Uchafion Cymru

 

Pt. 568.7m (SJ 133 392) – Welsh Highland Sub deletion 

There has been a deletion 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 LIDAR analysis conducted by Aled Williams. 

LIDAR image of Pt. 568.7m (SJ 133 392)

The criteria for the list that this deletion applies to are:

Welsh Highlands – Uchafion Cymru – Welsh hills at or above 500m in height with 15m minimum drop, with an accompanying sub list entitled the Welsh Highland Subs, the criteria for which is all Welsh hills at or above 500m in height with 10m or more and below 15m of drop.  This list is authored by Myrddyn Phillips and Aled Williams with the Introduction to the list published on Mapping Mountains in November 2015 and the latest update relating to the list published on Mapping Mountains in January 2023.

Welsh Highlands - Uchafion Cymru by Myrddyn Phillips and Aled Williams

The hill is being listed by the point (Pt. 568.7m) notation and it is adjoined to the Craig Berwyn group of hills, which are situated in the eastern part of North Wales (Region A, Sub-Region A3), and it is positioned with a minor road to its north-east and the A5 road to its north, and has the town of Llangollen towards the east north-east.

When the initial P10 sub list was completed in June 2020 this hill was listed with an estimated c 10m of drop, based on the 568m summit spot height that appears on the Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map and an estimated c 558m bwlch height, based on interpolation of 5m contouring that appeared online. 

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

However, it was not until LIDAR became available that the details for this hill could be accurately re-assessed.  The LIDAR (Light Detection & Ranging) technique produced highly accurate height data that is now freely available for much of England and Wales.

Therefore, the deletion of this hill from Welsh Highland Sub status is due to LIDAR analysis, resulting in a 568.7m summit height and a 558.9m bwlch height, with these values giving this hill 9.8m of drop, which is insufficient for it to be classified as a Welsh Highland Sub. 

 

The full details for the hill are: 

Group:  Craig Berwyn

Name:  Pt. 568.7m

OS 1:50,000 map:  125

Summit Height:  568.7m (LIDAR)

Summit Grid Reference:  SJ 13353 39284 (LIDAR)

Bwlch Height:  558.9m (LIDAR)

Bwlch Grid Reference:  SJ 12789 39284 (LIDAR)   

Drop:  9.8m (LIDAR) 

 

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 (September 2023)

 

 

 

Mapping Mountains – Hill Reclassifications – Welsh Highlands – Uchafion Cymru

Bryn Ceffyl (SH 786 371) – 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 LIDAR analysis conducted by Aled Williams. 

LIDAR image of Bryn Ceffyl (SH 786 371)

The criteria for the list that this addition applies to are:

Welsh Highlands – Uchafion Cymru – Welsh hills at or above 500m in height with 15m minimum drop, with an accompanying sub list entitled the Welsh Highland Subs, the criteria for which is all Welsh hills at or above 500m in height with 10m or more and below 15m of drop.  This list is authored by Myrddyn Phillips and Aled Williams with the Introduction to the list published on Mapping Mountains in November 2015 and the latest update relating to the list published on Mapping Mountains in January 2023.

Welsh Highlands - Uchafion Cymru by Myrddyn Phillips and Aled Williams

The name the hill is listed by is Bryn Ceffyl, and it is adjoined to the Arenig Fawr group of hills, which are situated in the central part of North Wales (Region A, Sub-Region A2), and it is positioned with the A4212 road to its north, and has the town of Y Bala towards the east.

When the initial P10 sub list was completed in June 2020 this hill was listed with an estimated c 7m of drop, based on a 505m summit height and an estimated c 498m bwlch height. 

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

However, it was not until LIDAR became available that the details for this hill could be accurately re-assessed.  The LIDAR (Light Detection & Ranging) technique produced highly accurate height data that is now freely available for much of England and Wales.

Therefore, the addition of this hill to Welsh Highland Sub status is due to LIDAR analysis, resulting in a 506.7m summit height and a 496.3m bwlch height, with these values giving this hill 10.5m of drop, which is sufficient for it to be classified as a Welsh Highland Sub. 

 

The full details for the hill are: 

Group:  Arenig Fawr

Name:  Bryn Ceffyl

OS 1:50,000 map:  124

Summit Height:  506.7m (LIDAR)

Summit Grid Reference:  SH 78639 37135 (LIDAR)

Bwlch Height:  496.3m (LIDAR)

Bwlch Grid Reference:  SH 78628 37059 (LIDAR)   

Drop:  10.5m (LIDAR) 

 

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 (September 2023) 

Mapping Mountains – Hill Reclassifications – Welsh Highlands – Uchafion Cymru

Graig Fach (SH 792 249) – Welsh Highland Sub deletion 

There has been a deletion 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 LIDAR analysis conducted by Aled Williams. 

LIDAR image of Graig Fach (SH 792 249)

The criteria for the list that this deletion applies to are:

Welsh Highlands – Uchafion Cymru – Welsh hills at or above 500m in height with 15m minimum drop, with an accompanying sub list entitled the Welsh Highland Subs, the criteria for which is all Welsh hills at or above 500m in height with 10m or more and below 15m of drop.  This list is authored by Myrddyn Phillips and Aled Williams with the Introduction to the list published on Mapping Mountains in November 2015 and the latest update relating to the list published on Mapping Mountains in January 2023.

Welsh Highlands - Uchafion Cymru by Myrddyn Phillips and Aled Williams

The name the hill is listed by is Graig Fach and it is adjoined to the Arenig Fawr group of hills, which are situated in the central part of North Wales (Region A, Sub-Region A2), and it is positioned with a minor road to its south south-east and the A494 road farther to its south-east, and has the small community of Rhyd-y-main towards the south south-east.

When the initial P10 sub list was completed in June 2020 this hill was listed with 10.2m of drop, based on a basic levelling survey conducted by Myrddyn Phillips on the 10.04.06, and listed with a 510m summit height and a 500m bwlch height, with an accompanying note stating that analysis of numerical data on various scales of Ordnance Survey maps give this hill an estimated c 9m of drop.  Therefore, it was included as a Welsh Highland Sub when the drop value of the subs was agreed upon and revised in July 2020. 

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

However, it was not until LIDAR became available that the details for this hill could be accurately re-assessed.  The LIDAR (Light Detection & Ranging) technique produced highly accurate height data that is now freely available for much of England and Wales.

Therefore, the deletion of this hill from Welsh Highland Sub status is due to LIDAR analysis, resulting in a 511.3m summit height and a 501.4m bwlch height, with these values giving this hill 9.9m of drop, which is insufficient for it to be classified as a Welsh Highland Sub. 

 

The full details for the hill are: 

Group:  Arenig Fawr

Name:  Graig Fach

OS 1:50,000 map:  124

Summit Height:  511.3m (LIDAR)

Summit Grid Reference:  SH 79263 24920 (LIDAR)

Bwlch Height:  501.4m (LIDAR)

Bwlch Grid Reference:  SH 79277 24975 (LIDAR)   

Drop:  9.9m (LIDAR) 

 

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 (August 2023)

 

 

 

 

  

Mapping Mountains – Hill Reclassifications – Welsh Highlands – Uchafion Cymru

Y Ddau Faen Llwyd (SH 804 310) – Welsh Highland Sub deletion 

There has been a deletion 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 LIDAR analysis conducted by Aled Williams. 

LIDAR image of Y Ddau Faen Llwyd (SH 804 310)

The criteria for the list that this deletion applies to are:

Welsh Highlands – Uchafion Cymru – Welsh hills at or above 500m in height with 15m minimum drop, with an accompanying sub list entitled the Welsh Highland Subs, the criteria for which is all Welsh hills at or above 500m in height with 10m or more and below 15m of drop.  This list is authored by Myrddyn Phillips and Aled Williams with the Introduction to the list published on Mapping Mountains in November 2015 and the latest update relating to the list published on Mapping Mountains in January 2023.

Welsh Highlands - Uchafion Cymru by Myrddyn Phillips and Aled Williams

The name the hill is listed by is Y Ddau Faen Llwyd and it is adjoined to the Arenig Fawr group of hills, which are situated in the central part of North Wales (Region A, Sub-Region A2), and it is positioned with a minor road to its north-east and south-west, and has the village of Llanuwchllyn towards the east. 

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 10m of drop, based on the 537m summit spot height that appears on online mapping, including the interactive map hosted on the WalkLakes website and a 527m bwlch height, based on the 1730ft (527.3m) levelled height that appears on the Ordnance Survey series of Six-Inch maps.  Therefore, it was included as a Welsh Highland Sub when the drop value of the subs was agreed upon and revised in July 2020. 

Extract from the interactive mapping hosted on the WalkLakes website

However, it was not until LIDAR became available that the details for this hill could be accurately re-assessed.  The LIDAR (Light Detection & Ranging) technique produced highly accurate height data that is now freely available for much of England and Wales. 

Extract from the Ordnance Survey series of Six-Inch maps

Therefore, the deletion of this hill from Welsh Highland Sub status is due to LIDAR analysis, resulting in a 537.3m summit height and a 527.6m bwlch height, with these values giving this hill 9.7m of drop, which is insufficient for it to be classified as a Welsh Highland Sub. 

 

The full details for the hill are: 

Group:  Arenig Fawr

Name:  Y Ddau Faen Llwyd

OS 1:50,000 map:  124, 125

Summit Height:  537.3m (LIDAR)

Summit Grid Reference:  SH 80456 31074 (LIDAR)

Bwlch Height:  527.6m (LIDAR)

Bwlch Grid Reference:  SH 80534 31223 (LIDAR)   

Drop:  9.7m (LIDAR) 

 

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 (August 2023)