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

 

Y Trichant - The 300m of Wales – Hill Reclassifications

Y Trichant are the Welsh hills at or above 300m and below 40om in height that have a minimum drop of 30m, with these hills forming the 300m height band within the listing of the Twmpau (thirty welsh metre prominences and upward).  Accompanying the main P30 list is a sub list entitled the 300m Sub-Trichant with the qualification to 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 Introduction to this list giving its publication history appeared on Mapping Mountains on 13.05.17.

The list is authored by Myrddyn Phillips and the posts that have appeared on Mapping Mountains detailing the additions, reclassifications and deletions to the main P30 list and the sub list appear below presented chronologically in receding order.

Mapping Mountains - Hill Reclassifications - Y Trichant

Cae Coch (SJ 006 070) – Sub-Trichant addition (175th reclassification)

Significant Name Changes post for Cae Coch

There has been confirmation of 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 LIDAR analysis conducted by Myrddyn Phillips. 

LIDAR image of Cae Coch (SJ 006 070)

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 Cae Coch and this was derived from the Tithe map, and it is adjoined to the Carnedd Wen group of hills, which are situated in the southern part of North Wales (Region A, Sub-Region A3), and it is positioned with minor roads to its north and west, and the A458 road to its north-east, and has the village of Llanerfyl towards the north-east.

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 24m of drop, based on an estimated c 306m summit height and an estimated c 282m bwlch height, with both heights based on interpolation of 5m contouring. 

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 confirmation of the addition of this hill to Sub-Trichant status is due to LIDAR analysis, resulting in a 306.2m summit height and a 279.7m bwlch height, with these values giving this hill 26.5m of drop, which is sufficient for it to be classified as a Sub-Trichant. 

 

The full details for the hill are: 

Group:  Carnedd Wen 

Name:  Cae Coch 

OS 1:50,000 map:  125

Summit Height:  306.2m (LIDAR)                                                           

Summit Grid Reference:  SJ 00687 07065 (LIDAR) 

Bwlch Height:  279.7m (LIDAR) 

Bwlch Grid Reference:  SJ 00845 06915 (LIDAR) 

Drop:  26.5m (LIDAR) 

 

Myrddyn Phillips (October 2022)

 

Mapping Mountains - Hill Reclassifications - Y Trichant

Cefn Gwyn (SO 028 995) – Sub-Trichant addition (174th reclassification)

Summit Relocations post for Cefn Gwyn

Significant Name Changes post for Cefn Gwyn

There has been confirmation of 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 LIDAR analysis conducted by Myrddyn Phillips. 

LIDAR image of Cefn Gwyn (SO 028 995)

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 Cefn Gwyn, and it is adjoined to the Carnedd Wen group of hills, which are situated in the southern part of North Wales (Region A, Sub-Region A3), and it is positioned with minor roads to its north, west and east, and the A470 road to its south-west, and has the village of Caersŵs towards the south.

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 21m of drop, based on the 382m summit spot height that appeared on the Ordnance Survey Vector Map Local hosted on the Geograph website and the 361m bwlch spot height that appears on the Ordnance Survey 1:25,000 Explorer map. 

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 confirmation of the addition of this hill to Sub-Trichant status is due to LIDAR analysis, resulting in a 382.7m summit height and a 362.0m bwlch height, with these values giving this hill 20.6m of drop, which is sufficient for it to be classified as a Sub-Trichant. 

 

The full details for the hill are: 

Group:  Carnedd Wen 

Name:  Cefn Gwyn 

OS 1:50,000 map:  136

Summit Height:  382.7m (LIDAR)                                                           

Summit Grid Reference:  SO 02813 99573 (LIDAR) 

Bwlch Height:  362.0m (LIDAR) 

Bwlch Grid Reference:  SO 02633 99303 (LIDAR) 

Drop:  20.6m (LIDAR) 

 

Myrddyn Phillips (October 2022)

 

Mapping Mountains - Hill Reclassifications - Y Trichant

Pt. 388.0m (SH 978 000) – Sub-Trichant addition (173rd reclassification)

Significant Name Changes post for Pt. 388.0m

There has been confirmation of 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 LIDAR analysis conducted by Myrddyn Phillips. 

LIDAR image of Pt. 388.0m (SH 978 000)

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 hill is being listed by the point (Pt. 388.0m) notation as an appropriate name for it either through local enquiry and/or historic research has not been found by the author, and it is adjoined to the Carnedd Wen group of hills, which are situated in the southern part of North Wales (Region A, Sub-Region A3), and it is positioned with minor roads to its north and west, and the A470 road to its south-west, and has the village of Carno towards the south south-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. 

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 and it was listed with 23m of drop, based on the 388m summit spot height and the 365m bwlch spot height that appeared on the Ordnance Survey Vector Map Local hosted on the Geograph website and which was entitled the Interactive Coverage 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 confirmation of the addition of this hill to Sub-Trichant status is due to LIDAR analysis, resulting in a 388.0m summit height and a 364.9m bwlch height, with these values giving this hill 23.2m of drop, which is sufficient for it to be classified as a Sub-Trichant. 

 

The full details for the hill are: 

Group:  Carnedd Wen 

Name:  Pt. 388.0m 

OS 1:50,000 map:  136

Summit Height:  388.0m (LIDAR)                                                           

Summit Grid Reference:  SH 97819 00071 (LIDAR) 

Bwlch Height:  364.9m (LIDAR) 

Bwlch Grid Reference:  SH 98147 00343 (LIDAR) 

Drop:  23.2m (LIDAR) 

 

Myrddyn Phillips (September 2022)

 

Mapping Mountains - Hill Reclassifications - Y Trichant

Pt. 357.9m (SH 939 029) – Sub-Trichant addition (172nd reclassification)

Significant Name Changes post for Pt. 357.9m

There has been confirmation of 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 and LIDAR analysis conducted by Myrddyn Phillips. 

LIDAR image of Pt. 357.9m (SH 939 029)

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 hill is being listed by the point (Pt. 357.9m) notation as an appropriate name for it either through local enquiry and/or historic research has not been found by the author, and it is adjoined to the Carnedd Wen group of hills, which are situated in the southern part of North Wales (Region A, Sub-Region A3), and it is positioned with the A470 road to its south-west and a minor road to its south-east, and has the village of Talerddig towards the south.

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 23m of drop, based on the 358m summit spot height that appeared on the Ordnance Survey Vector Map Local hosted on the Geograph website and which was entitled the Interactive Coverage Map and an estimated c 335m bwlch height, based on interpolation of 10m contouring between 330m – 340m that appears 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 and digitally updated 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 330m – 335m, with interpolation placing the height of the bwlch as an estimated c 334m, giving this hill an estimated c 24m of drop.

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 confirmation of the addition of this hill to Sub-Trichant status is due to LIDAR analysis and detail on contemporary maps produced from Ordnance Survey data, resulting in a 357.9m summit height and an estimated c 334m bwlch height, with these values giving this hill an estimated c 24m of drop, which is sufficient for it to be classified as a Sub-Trichant. 

 

The full details for the hill are: 

Group:  Carnedd Wen 

Name:  Pt. 357.9m 

OS 1:50,000 map:  136

Summit Height:  357.9m (LIDAR)                                                           

Summit Grid Reference:  SH 93969 02971 (LIDAR) 

Bwlch Height:  c 334m (interpolation) 

Bwlch Grid Reference:  SH 94097 02750 (interpolation) 

Drop:  c 24m (LIDAR summit and interpolated bwlch) 

 

Myrddyn Phillips (September 2022)

Mapping Mountains - Hill Reclassifications - Y Trichant

Gallt y Goedhwch (SJ 137 159) – Sub-Trichant reclassified to Trichant (171st reclassification)

Survey post for Gallt y Goedhwch

There has been confirmation of a reclassification 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 a Trimble GeoXH 6000 survey conducted by Myrddyn Phillips with assistance from Mark Trengove and LIDAR analysis conducted by Myrddyn Phillips. 

Gallt y Goedhwch (SJ 137 159)

The criteria for the list that this reclassification 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 Gallt y Goedhwch, and it is adjoined to the Foel Cedig group of hills, which are situated in the southern part of North Wales (Region A, Sub-Region A3), and it is positioned encircled by minor roads, with the A490 road farther to its north-east, the B4393 road farther to its north-west, the B4382 road farther to its west and the A495 road farther to its south-east, and has the village of Meifod towards the south-east.

When the original 300m height band of Welsh P30 hills were published on Geoff Crowder’s v-g.me website, this hill was included as the non-prioritised summit in the Hills to be surveyed sub list that accompanied the main P30 list with an accompanying note stating; Two points of same height (Maes-y-castell SJ137155).  The hill previously listed as Maes-y-castell has now been renamed as Lower Field, and it was this hill that was listed as the prioritised qualifying P30. 

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 and it was listed with 114m of drop, based on the 325m summit spot height and the 211m bwlch spot height that appeared on the Ordnance Survey Vector Map Local hosted on the Geograph website and which was entitled the Interactive Coverage Map.

However, it was not until the survey with the Trimble GeoXH 6000 that the details for the summit of this hill could be accurately re-assessed.  The hill has also now been analysed by LIDAR (Light Detection & Ranging); a technique which produced highly accurate height data that is now freely available for much of England and Wales.

The Trimble GeoXH 6000 gathering data at the summit of Gallt y Goedhwch

 

LIDAR bwlch image of Gallt y Goedhwch

Therefore, the confirmation of the reclassification of this hill from Sub-Trichant status is due to a Trimble GeoXH 6000 summit survey and LIDAR bwlch analysis, resulting in a 325.7m summit height and a 212.1m bwlch height, with these values giving this hill 113.6m of drop, which is sufficient for it to be classified as a Trichant. 

 

The full details for the hill are: 

Group:  Foel Cedig 

Name:  Gallt y Goedhwch 

OS 1:50,000 map:  125

Summit Height:  325.7m (converted to OSGM15, Trimble GeoXH 6000)

Summit Grid Reference:  SJ 13709 15922 (Trimble GeoXH 6000)                                     

Bwlch Height:  212.1m (LIDAR) 

Bwlch Grid Reference:  SJ 11170 14801 (LIDAR) 

Drop:  113.6m (Trimble GeoXH 6000 summit and LIDAR bwlch) 

 

Myrddyn Phillips (September 2022)

Mapping Mountains - Hill Reclassifications - Y Trichant

Lower Field (SJ 137 155) – Trichant reclassified to Sub-Trichant (170th reclassification)

Survey post for Lower Field

Significant Name Changes post for Lower Field

There has been confirmation of a reclassification 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 a Trimble GeoXH 6000 survey conducted by Myrddyn Phillips with assistance from Mark Trengove. 

LIDAR image of Lower Field (SJ 137 155)

The criteria for the list that this reclassification 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 now listed by is Lower Field and this was derived from the Tithe map, and it is adjoined to the Foel Cedig group of hills, which are situated in the southern part of North Wales (Region A, Sub-Region A3), and it is positioned encircled by minor roads, with the A490 road farther to its north-east, the B4393 road farther to its north-west, the B4382 road farther to its west and the A495 road farther to its south-east, and has the village of Meifod towards the south-east.

When the original 300m height band of Welsh P30 hills were published on Geoff Crowder’s v-g.me website, this hill was included as the prioritised summit in the main P30 list with an accompanying note stating; Two points of same height (Gallt y Goedhwch SJ137159), with Gallt y Goedhwch listed as the qualifying P20. 

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

When 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 24m of drop, based on an estimated c 320m summit height and an estimated c 296m bwlch height, with both heights based on interpolation of 10m contouring that appears on the Ordnance Survey 1:25,000 Explorer map, with the prioritised summit given to Gallt y Goedhwch.

However, it was not until the survey with the Trimble GeoXH 6000 that the details for this hill could be accurately re-assessed.  The hill has also now been analysed by LIDAR (Light Detection & Ranging); a technique which produced highly accurate height data that is now freely available for much of England and Wales. 

The Trimble GeoXH 6000 gathering data at the summit of Lower Field

The Trimble GeoXH 6000 gathering data at the bwlch of Lower Field

Therefore, the confirmation of the reclassification of this hill from Trichant status is due to a Trimble GeoXH 6000 survey, resulting in a 321.1m summit height and a 295.3m bwlch height, with these values giving this hill 25.8m of drop, which is sufficient for it to be classified as a Sub-Trichant. 

 

The full details for the hill are: 

Group:  Foel Cedig 

Name:  Lower Field 

OS 1:50,000 map:  125

Summit Height:  321.1m (converted to OSGM15)                                                           

Summit Grid Reference:  SJ 13704 15586                                     

Bwlch Height:  295.3m (converted to OSGM15) 

Bwlch Grid Reference:  SJ 13681 15650 

Drop:  25.8m 

 

Myrddyn Phillips (August 2022)

Mapping Mountains - Hill Reclassifications - Y Trichant

Cae Talcen Ysgubor (SJ 093 152) – Trichant reclassified to Sub-Trichant (169th reclassification)

Significant Name Changes post for Cae Talcen Ysgubor

There has been a reclassification 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 LIDAR analysis conducted by Myrddyn Phillips. 

LIDAR image of Cae Talcen Ysgubor (SJ 093 152)

The criteria for the list that this reclassification 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 Cae Talcen Ysgubor and this was derived from the Tithe map, and it is adjoined to the Foel Cedig group of hills, which are situated in the southern part of North Wales (Region A, Sub-Region A3), and it is positioned encircled by minor roads, with the B4382 road farther to its west, and has the town of Llanfyllin towards the north-east.

When the original 300m height band of Welsh P30 hills were published on Geoff Crowder’s v-g.me website, this hill was included in the Hills to be surveyed sub list, as it was considered not to meet the criteria then used for the main P30 category.

When 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 29m of drop, based on the 331m summit spot height that appears on the Ordnance Survey 1:25,000 Explorer map and an estimated c 302m bwlch height, based on interpolation of 10m contouring between 300m – 310m. 

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 and digitally updated such as the interactive mapping on the Magic Maps and WalkLakes websites.

The details for this hill were re-assessed when the Ordnance Survey Vector Map Local hosted on the Geograph website and which was entitled the Interactive Coverage Map became available online.  This mapping had many spot heights not on other publicly available Ordnance Survey maps and for this hill it had a 301m bwlch spot height, and when coupled with its 331m summit spot height these values gave this hill 30m of drop.

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 reclassification of this hill to Sub-Trichant status is due to LIDAR analysis, resulting in a 330.8m summit height and a 301.7m bwlch height, with these values giving this hill 29.1m of drop, which is insufficient for it to be classified as a Trichant. 

 

The full details for the hill are: 

Group:  Foel Cedig 

Name:  Cae Talcen Ysgubor 

OS 1:50,000 map:  125

Summit Height:  330.8m (LIDAR)                                                           

Summit Grid Reference:  SJ 09389 15229 (LIDAR) 

Bwlch Height:  301.7m (LIDAR) 

Bwlch Grid Reference:  SJ 09507 15592 (LIDAR) 

Drop:  29.1m (LIDAR) 

 

Myrddyn Phillips (August 2022)

 

 

Mapping Mountains - Hill Reclassifications - Y Trichant

Ffridd (SJ 031 167) – Sub-Trichant addition (168th reclassification)

Significant Name Changes post for Ffridd

There has been confirmation of 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 LIDAR analysis conducted by Myrddyn Phillips. 

LIDAR image of Ffridd (SJ 031 167)

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 Ffridd and this was derived from the Tithe map, and it is adjoined to the Foel Cedig group of hills, which are situated in the southern part of North Wales (Region A, Sub-Region A3), and it is positioned with minor roads to its east, north and west, the B4395 road farther to its south-east and the B4393 road farther to its north-east, and has the village of Llanwddyn 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 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 22m of drop, based on the 339m summit spot height that appears on the Ordnance Survey 1:25,000 Explorer map and the 317m bwlch spot height that appeared on the Ordnance Survey Vector Map Local hosted on the Geograph website and which was entitled the Interactive Coverage Map. 

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 confirmation of the addition of this hill to Sub-Trichant status is due to LIDAR analysis, resulting in a 338.4m summit height and a 315.4m bwlch height, with these values giving this hill 23.0m of drop, which is sufficient for it to be classified as a Sub-Trichant. 

 

The full details for the hill are: 

Group:  Foel Cedig 

Name:  Ffridd 

OS 1:50,000 map:  125

Summit Height:  338.4m (LIDAR)                                                           

Summit Grid Reference:  SJ 03171 16727 (LIDAR) 

Bwlch Height:  315.4m (LIDAR) 

Bwlch Grid Reference:  SJ 02999 16910 (LIDAR) 

Drop:  23.0m (LIDAR) 

 

Myrddyn Phillips (July 2022)

 

Mapping Mountains - Hill Reclassifications - Y Trichant

Yr Oerfa (SJ 101 191) – Sub-Trichant addition (167th reclassification)

There has been confirmation of 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 and LIDAR analysis conducted by Myrddyn Phillips. 

Yr Oerfa (SJ 101 191)

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 Yr Oerfa, and it is adjoined to the Foel Cedig group of hills, which are situated in the southern part of North Wales (Region A, Sub-Region A3), and it is positioned with minor roads to its north, west and south, and the B4393 road to its south-east, and has the town of Llanfyllin towards the east.

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 25m of drop, based on the 377m summit spot height that appears on the Ordnance Survey 1:25,000 Explorer map and an estimated c 352m bwlch height, based on interpolation of 10m contouring between 350m – 360m. 

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 Sub-Trichant status is due to detail on contemporary maps produced from Ordnance Survey data and LIDAR analysis, resulting in a 377.3m summit height and an estimated c 352m bwlch height, with these values giving this hill an estimated c 25m of drop, which is sufficient for it to be classified as a Sub-Trichant. 

 

The full details for the hill are: 

Group:  Foel Cedig 

Name:  Yr Oerfa 

OS 1:50,000 map:  125

Summit Height:  377.3m (LIDAR)                                                           

Summit Grid Reference:  SJ 01051 19181 (LIDAR) 

Bwlch Height:  c 352m (interpolation) 

Bwlch Grid Reference:  SJ 10156 19505 (interpolation) 

Drop:  c 25m (LIDAR summit and interpolated bwlch) 

 

Myrddyn Phillips (July 2022)

Mapping Mountains - Hill Reclassifications - Y Trichant

Ffridd Bryn Gogledd (SJ 035 176) – Sub-Trichant reclassified to Trichant (166th resclassification)

There has been confirmation of a reclassification 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 LIDAR analysis conducted by Myrddyn Phillips. 

LIDAR image of Ffridd Bryn Gogledd (SJ 035 176) 

The criteria for the list that this reclassification 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 Ffridd Bryn Gogledd, and it is adjoined to the Foel Cedig group of hills, which are situated in the southern part of North Wales (Region A, Sub-Region A3), and it is positioned with a minor road to its north-west and south-west, B4395 road to its south-east and the B4393 road to its north-east, and has the village of Llanwddyn 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 included in the Hills to be surveyed sub list, as it was considered not to meet the criteria then used for the main P30 category.

When 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 31m of drop, based on the 342m summit spot height that appears on the Ordnance Survey 1:25,000 Explorer map and an estimated c 311m bwlch height, based on interpolation of 10m contouring between 310m – 320m. 

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 confirmation of the reclassification of this hill from Sub-Trichant status is due to LIDAR analysis, resulting in a 342.7m summit height and a 310.6m bwlch height, with these values giving this hill 32.0m of drop, which is sufficient for it to be classified as a Trichant. 

 

The full details for the hill are: 

Group:  Foel Cedig 

Name:  Ffridd Bryn Gogledd 

OS 1:50,000 map:  125

Summit Height:  342.7m (LIDAR)                                                           

Summit Grid Reference:  SJ 03507 17643 (LIDAR) 

Bwlch Height:  310.6m (LIDAR) 

Bwlch Grid Reference:  SJ 03748 17857 (LIDAR) 

Drop:  32.0m (LIDAR) 

 

Myrddyn Phillips (July 2022)

 

 

Mapping Mountains - Hill Reclassifications - Y Trichant

Y Foel (SJ 096 183) – Sub-Trichant addition (165th reclassification)

There has been confirmation of 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 LIDAR analysis conducted by Myrddyn Phillips. 

LIDAR image of Y Foel (SJ 096 183)

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 Y Foel, and it is adjoined to the Foel Cedig group of hills, which are situated in the southern part of North Wales (Region A, Sub-Region A3), and it is positioned with a minor road to its north and the B4393 road to its south, and has the town of Llanfyllin towards the east north-east.

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 25m of drop, based on the 306m summit spot height that appears on the Ordnance Survey 1:25,000 Explorer map and the 281m bwlch spot height that appeared on the Ordnance Survey Vector Map Local hosted on the Geograph website and which was entitled the Interactive Coverage Map. 

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 confirmation of the addition of this hill to Sub-Trichant status is due to LIDAR analysis, resulting in a 306.4m summit height and a 283.6m bwlch height, with these values giving this hill 22.8m of drop, which is sufficient for it to be classified as a Sub-Trichant. 

 

The full details for the hill are: 

Group:  Foel Cedig 

Name:  Y Foel 

OS 1:50,000 map:  125

Summit Height:  306.4m (LIDAR)                                                           

Summit Grid Reference:  SJ 09699 18351 (LIDAR) 

Bwlch Height:  283.6m (LIDAR) 

Bwlch Grid Reference:  SJ 09237 18425 (LIDAR) 

Drop:  22.8m (LIDAR) 

 

Myrddyn Phillips (July 2022)

Mapping Mountains - Hill Reclassifications - Y Trichant

Cefn Brân (SJ 096 199) – Sub-Trichant reclassified to Trichant (164th reclassification)

Survey post for Cefn Brân 

There has been confirmation of a reclassification 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 a Trimble GeoXH 6000 survey conducted by Myrddyn Phillips. 

Cefn Brân (SJ 096 199)

The criteria for the list that this reclassification 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.

The name the hill is listed by is Cefn Brân, and it is adjoined to the Foel Cedig group of hills, which are situated in the southern part of North Wales (Region A, Sub-Region A3), and it is positioned encircled by minor roads, with the B4391 road farther to its north-east, the B4396 road farther to its west and the B4393 road farther to its south, and has the town of Llanfyllin towards the east.

When the original 300m height band of Welsh P30 hills were published on Geoff Crowder’s v-g.me website, this hill was included in the Hills to be surveyed sub list, as it was considered not to meet the criteria then used for the main P30 category.

When 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 29m of drop, based on the 391m summit spot height that appears on the Ordnance Survey 1:25,000 Explorer map and an estimated c 362m bwlch height, based on interpolation of 10m contouring between 360m – 370m. 

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 and digitally updated such as the interactive mapping on the Magic Maps and WalkLakes websites.

The details for this hill were re-assessed when the Ordnance Survey Vector Map Local hosted on the Geograph website and which was entitled the Interactive Coverage Map became available online.  This mapping had many spot heights not on other publicly available Ordnance Survey maps and for this hill it had a 361m bwlch spot height and when coupled with the 391m summit spot height, these values gave this hill 30m of drop. 

The Trimble GeoXH 6000 gathering data at the summit of Cefn Brân

The Trimble GeoXH 6000 gathering data at the bwlch of Cefn Brân

However, it was not until the Trimble GeoXH 6000 survey was conducted that accurate heights and positions for this hill could be obtained, and it is these data that confirm the reclassification of this hill.

Therefore, the confirmation of the reclassification of this hill from Sub-Trichant status is due to a Trimble GeoXH 6000 survey, resulting in a 391.3m summit height and a 361.3m bwlch height, with these values giving this hill 30.1m of drop, which is sufficient for it to be classified as a Trichant. 

 

The full details for the hill are: 

Group:  Foel Cedig 

Name:  Cefn Brân 

OS 1:50,000 map:  125

Summit Height:  391.3m (converted to OSGM15)  

Summit Grid Reference:  SJ 09634 19959 

Bwlch Height:  361.3m (converted to OSGM15) 

Bwlch Grid Reference:  SJ 09289 20126 

Drop:  30.1m 

 

Myrddyn Phillips (July 2022)

 

Mapping Mountains - Hill Reclassifications - Y Trichant

Moel Frochas (SJ 118 225) – Sub-Trichant addition (163rd reclassification)

There has been confirmation of 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 and LIDAR analysis conducted by Myrddyn Phillips. 

LIDAR image of Moel Frochas (SJ 118 225)

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 Moel Frochas, and it is adjoined to the Foel Cedig group of hills, which are situated in the southern part of North Wales (Region A, Sub-Region A3), and it is positioned with minor roads to its north and south, and the B4391 road to its north-east, and has the town of Llanfyllin towards the south-east.

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 23m of drop, based on the 326m summit spot height that appears on the Ordnance Survey 1:25,000 Explorer map and an estimated c 303m bwlch height, based on interpolation of 10m contouring between 300m – 310m. 

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 and digitally updated 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 300m – 305m, with interpolation placing the height of the bwlch as an estimated c 302m.

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 Sub-Trichant status is due to detail on contemporary maps produced from Ordnance Survey data and LIDAR analysis, resulting in a 326.3m summit height and an estimated c 302m bwlch height, with these values giving this hill an estimated c 24m of drop, which is sufficient for it to be classified as a Sub-Trichant. 

 

The full details for the hill are: 

Group:  Foel Cedig 

Name:  Moel Frochas 

OS 1:50,000 map:  125

Summit Height:  326.3m (LIDAR)                                                           

Summit Grid Reference:  SJ 11857 22583 (LIDAR) 

Bwlch Height:  c 302m (interpolation) 

Bwlch Grid Reference:  SJ 12002 22992 (interpolation) 

Drop:  c 24m (LIDAR summit and interpolated bwlch) 

 

Myrddyn Phillips (July 2022)

 

Mapping Mountains - Hill Reclassifications - Y Trichant

Cefn Lle Oer (SJ 109 228) – Sub-Trichant deletion (162nd reclassification)

There has been a deletion 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 deletion 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 Cefn Lle Oer, and it is adjoined to the Foel Cedig group of hills, which are situated in the southern part of North Wales (Region A, Sub-Region A3), and it is positioned with minor roads to its north, west and south, the B4391 road farther to its north-east, the B4396 road farther to its west and the B4393 road farther to its south, and has the town of Llanfyllin towards the south-east.

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 24m of drop, based on the 326m summit spot height that appears on the Ordnance Survey 1:25,000 Explorer map and an estimated c 302m bwlch height, based on interpolation of 10m contouring between 300m – 310m. 

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 and digitally updated 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 305m – 310m, with interpolation placing the height of the bwlch as an estimated c 307m.

Therefore, the deletion of this hill from Sub-Trichant status is due to detail on contemporary maps produced from Ordnance Survey data, resulting in a 326m summit height and an estimated c 307m bwlch height, with these values giving this hill an estimated c 19m of drop, which is insufficient for it to be classified as a Sub-Trichant. 

 

The full details for the hill are: 

Group:  Foel Cedig 

Name:  Cefn Lle Oer 

OS 1:50,000 map:  125

Summit Height:  326m (spot height)                                                           

Summit Grid Reference:  SJ 10931 22882 (spot height) 

Bwlch Height:  c 307m (interpolation) 

Bwlch Grid Reference:  SJ 11359 22977 (interpolation) 

Drop:  c 19m (spot height summit and interpolated bwlch) 

 

Myrddyn Phillips (July 2022)

Mapping Mountains - Hill Reclassifications - Y Trichant

Mynydd Jaram (SJ 183 219) – Trichant reclassified to Sub-Trichant (161st reclassification)

There has been a reclassification 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 LIDAR analysis conducted by Myrddyn Phillips. 

LIDAR image of Mynydd Jaram (SJ 183 219)

The criteria for the list that this reclassification 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 Jaram, and it is adjoined to the Foel Cedig group of hills, which are situated in the southern part of North Wales (Region A, Sub-Region A3), and it is positioned encircled by minor roads, with the B4396 road farther to its north, the B4580 road farther to its west and the B4393 road farther to its south, and has the town of Llanfyllin towards the south-west.

When the original 300m height band of Welsh P30 hills were published on Geoff Crowder’s v-g.me website, this hill was included in the Hills to be surveyed sub list, as it was considered not to meet the criteria then used for the main P30 category.

When 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 31m of drop, based on the 336m summit spot height that appears on the Ordnance Survey 1:25,000 Explorer map and an estimated c 305m bwlch height, based on interpolation of 10m contouring between 300m – 310m.  The bwlch height was subsequently re-assessed and listed as an estimated c 306m, resulting in the drop value being amended to an estimated c 30m. 

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 reclassification of this hill to Sub-Trichant status is due to LIDAR analysis, resulting in a 336.6m summit height and a 307.7m bwlch height, with these values giving this hill 28.9m of drop, which is insufficient for it to be classified as a Trichant. 

 

The full details for the hill are: 

Group:  Foel Cedig 

Name:  Mynydd Jaram 

OS 1:50,000 map:  125

Summit Height:  336.6m (LIDAR)                                                           

Summit Grid Reference:  SJ 18393 21961 (LIDAR) 

Bwlch Height:  307.7m (LIDAR) 

Bwlch Grid Reference:  SJ 18109 22085 (LIDAR) 

Drop:  28.9m (LIDAR) 

 

Myrddyn Phillips (July 2022)

Mapping Mountains - Hill Reclassifications - Y Trichant

Y Garth (SJ 127 231) – Sub-Trichant addition (160th reclassification)

There has been confirmation of 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 and LIDAR analysis conducted by Myrddyn Phillips. 

LIDAR image of Y Garth (SJ 127 231)

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 Y Garth, and it is adjoined to the Foel Cedig group of hills, which are situated in the southern part of North Wales (Region A, Sub-Region A3), and it is positioned with the B4396 road to its north, the B4391 road to its south and the B4580 road to its east, and has the town of Llanfyllin towards the south south-east.

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 25m of drop, based on the 304m summit spot height that appears on the Ordnance Survey 1:25,000 Explorer map and the 279m bwlch spot height that appeared on the Ordnance Survey Vector Map Local hosted on the Geograph website and which was entitled the Interactive Coverage Map.  The bwlch height has subsequently been re-assessed and estimated as c 283m in 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 confirmation of the addition of this hill to Sub-Trichant status is due to detail on contemporary maps produced from Ordnance Survey data and LIDAR analysis, resulting in a 304.5m summit height and an estimated c 283m bwlch height, with these values giving this hill an estimated c 21m of drop, which is sufficient for it to be classified as a Sub-Trichant. 

 

The full details for the hill are: 

Group:  Foel Cedig 

Name:  Y Garth 

OS 1:50,000 map:  125

Summit Height:  304.5m (LIDAR)                                                           

Summit Grid Reference:  SJ 12745 23155 (LIDAR) 

Bwlch Height:  c 283m (interpolation) 

Bwlch Grid Reference:  SJ 12544 23096 (interpolation) 

Drop:  c 21m (LIDAR summit and interpolated bwlch) 

 

Myrddyn Phillips (July 2022)

 

 

Mapping Mountains - Hill Reclassifications - Y Trichant

Ffridd y Garnedd (SJ 000 173) – Sub-Trichant addition (159th reclassification)

There has been confirmation of 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 LIDAR analysis conducted by Myrddyn Phillips. 

LIDAR summit image of Ffridd y Garnedd (SJ 000 173) 

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 Ffridd y Garnedd, 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 B4393 road to its north, the A458 road to its south and the B4395 road to its south-east, and has the village of Llanwddyn towards the north-east.

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 23m of drop, based on an estimated c 376m summit height and an estimated c 353m bwlch height, with both heights based on interpolation of 10 contouring that appear on the Ordnance Survey 1:25,000 Explorer map. 

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. 

LIDAR bwlch image of Ffridd y Garnedd

Therefore, the confirmation of the addition of this hill to Sub-Trichant status is due to LIDAR analysis, resulting in a 374.8m summit height and a 351.1m bwlch height, with these values giving this hill 23.7m of drop, which is sufficient for it to be classified as a Sub-Trichant. 

 

The full details for the hill are: 

Group:  Esgeiriau Gwynion 

Name:  Ffridd y Garnedd 

OS 1:50,000 map:  125

Summit Height:  374.8m (LIDAR)                                                           

Summit Grid Reference:  SJ 00097 17359 (LIDAR) 

Bwlch Height:  351.1m (LIDAR) 

Bwlch Grid Reference:  SH 99815 17434 (LIDAR) 

Drop:  23.7m (LIDAR) 

 

Myrddyn Phillips (June 2022)

Mapping Mountains - Hill Reclassifications - Y Trichant

Ffridd Dyfnant (SH 996 164) – Sub-Trichant addition (158th reclassification)

There has been confirmation of 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 and LIDAR analysis conducted by Myrddyn Phillips. 

LIDAR bwlch image of Ffridd Dyfnant (summit at SH 996 164)

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 Ffridd Dyfnant, 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 B4393 road to its north, the A458 road to its south and the B4395 road to its east, and has the village of Llangadfan towards the south.

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 21m of drop, based on the 399m summit spot height that appears on the Ordnance Survey 1:25,000 Explorer map and the 378m bwlch spot height that appeared on the Ordnance Survey Vector Map Local hosted on the Geograph website and which was entitled the Interactive Coverage Map. 

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 confirmation of the addition of this hill to Sub-Trichant status is due to detail on contemporary maps produced from Ordnance Survey data and LIDAR bwlch analysis, resulting in a 399m summit height and a 378.1m bwlch height, with these values giving this hill 21m of drop, which is sufficient for it to be classified as a Sub-Trichant. 

 

The full details for the hill are: 

Group:  Esgeiriau Gwynion 

Name:  Ffridd Dyfnant 

OS 1:50,000 map:  125

Summit Height:  399m (spot height)                                                           

Summit Grid Reference:  SH 99689 16401 (spot height) 

Bwlch Height:  378.1m (LIDAR) 

Bwlch Grid Reference:  SH 99559 16611 (LIDAR) 

Drop:  21m (spot height summit and LIDAR bwlch) 

 

Myrddyn Phillips (June 2022)

 

 

Mapping Mountains - Hill Reclassifications - Y Trichant

Mynydd y Gadfa (SH 993 151) – Sub-Trichant addition (157th reclassification)

There has been confirmation of 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 y Gadfa, 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 A458 road to its south and the B4395 road to its east, and has the village of Llangadfan towards the south south-east.

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 23m of drop, based on an estimated c 374m summit height and an estimated c 351m 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 and digitally updated such as the interactive mapping on the Magic Maps and WalkLakes websites.

One of the mapping resources now available online is the WalkLakes website which hosts an interactive map originated from the Ordnance Survey Open Data programme.  This map has many spot heights not on other publicly available maps and a 373m spot height is given on the summit area of this hill. 

Extract from the WalkLakes website

Therefore, the confirmation of the addition of this hill to Sub-Trichant status is due to detail on contemporary maps produced from Ordnance Survey data, resulting in a 373m summit height and an estimated c 351m 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:  Esgeiriau Gwynion 

Name:  Mynydd y Gadfa 

OS 1:50,000 map:  125

Summit Height:  373m (spot height)                                                           

Summit Grid Reference:  SH 99336 15127 (spot height) 

Bwlch Height:  c 351m (interpolation) 

Bwlch Grid Reference:  SH 98424 15160 (interpolation) 

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

 

Myrddyn Phillips (June 2022)

 

 

Mapping Mountains - Hill Reclassifications - Y Trichant

Bryniau Gwenllian (SJ 001 139) – Sub-Trichant addition (156th reclassification)

Significant Height Revisions post for Bryniau Gwenllian

Significant Name Changes post for Bryniau Gwenllian

There has been confirmation of 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 Bryniau Gwenllian and this was derived from the Tithe map, 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 a minor road to its south-west, the A458 road farther to its south-west and the B4395 road to its east, and has the village of Llangadfan towards the south south-east.

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 20m of drop, based on an estimated c 355m summit height and an estimated c 335m 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 and digitally updated 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.  Until recently this mapping had many spot heights not on other publicly available maps and for this hill it had a 358m summit spot height. 

Extract from the Magic Maps website

Therefore, the confirmation of the addition of this hill to Sub-Trichant status is due to detail on contemporary maps produced from Ordnance Survey data, resulting in a 358m summit height and an estimated c 336m 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:  Esgeiriau Gwynion 

Name:  Bryniau Gwenllian 

OS 1:50,000 map:  125

Summit Height:  358m (spot height)                                                           

Summit Grid Reference:  SJ 00115 13999 (spot height) 

Bwlch Height:  c 336m (interpolation) 

Bwlch Grid Reference:  SJ 00435 14248 (interpolation) 

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

 

Myrddyn Phillips (June 2022)

Mapping Mountains - Hill Reclassifications - Y Trichant

Waun Llwyd (SJ 003 165) – Sub-Trichant addition (155th reclassification)

Significant Height Revisions post for Waun Llwyd

Significant Name Changes post for Waun Llwyd

There has been confirmation of 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 LIDAR analysis conducted by Myrddyn Phillips. 

LIDAR image of Waun Llwyd (SJ 003 165)

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 Waun Llwyd and this was derived from the Tithe map, 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 a minor road to its north and east, and has the village of Llanwddyn towards the north-east.

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 20m of drop, based on an estimated c 363m summit height and an estimated c 343m 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

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 confirmation of the addition of this hill to Sub-Trichant status is due to LIDAR analysis, resulting in a 367.4m summit height and a 345.2m bwlch height, with these values giving this hill 22.2m of drop, which is sufficient for it to be classified as a Sub-Trichant. 

 

The full details for the hill are: 

Group:  Esgeiriau Gwynion 

Name:  Waun Llwyd 

OS 1:50,000 map:  125

Summit Height:  367.4m (LIDAR)                                                           

Summit Grid Reference:  SJ 00323 16521 (LIDAR) 

Bwlch Height:  345.2m (LIDAR) 

Bwlch Grid Reference:  SJ 00193 16719 (LIDAR) 

Drop:  22.2m (LIDAR) 

 

Myrddyn Phillips (June 2022)

 

 

Mapping Mountains - Hill Reclassifications - Y Trichant

Ffridd Cedig (SJ 006 150) – Trichant reclassified to Sub-Trichant (154th reclassification)

Significant Name Changes post for Ffridd Cedig

There has been a reclassification 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 LIDAR analysis conducted by Myrddyn Phillips. 

LIDAR image of Ffridd Cedig (SJ 006 150)

The criteria for the list that this reclassification 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 now listed by is Ffridd Cedig and this was derived from the Tithe map, 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 a minor road to its north, south-west and north-east, and the B4395 road to its south-east, and has the village of Llangadfan towards the south.

When the original 300m height band of Welsh P30 hills were published on Geoff Crowder’s v-g.me website, this hill was included in the main P30 category with a summit height of c 340m.

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 32m of drop, based on an estimated c 341m summit height and an estimated c 309m 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

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 reclassification of this hill to Sub-Trichant status is due to LIDAR analysis, resulting in a 339.7m summit height and a 309.8m bwlch height, with these values giving this hill 29.9m of drop, which is insufficient for it to be classified as a Trichant. 

 

The full details for the hill are: 

Group:  Esgeiriau Gwynion 

Name:  Ffridd Cedig 

OS 1:50,000 map:  125

Summit Height:  339.7m (LIDAR)                                                           

Summit Grid Reference:  SJ 00605 15009 (LIDAR) 

Bwlch Height:  309.8m (LIDAR) 

Bwlch Grid Reference:  SJ 00639 14751 (LIDAR) 

Drop:  29.9m (LIDAR) 

 

Myrddyn Phillips (May 2022)

Mapping Mountains - Hill Reclassifications - Y Trichant

Carreg y Frân (SH 961 140) – Sub-Trichant addition (153rd reclassification)

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 Carreg y Frân, 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 a minor road to its north and east and the A458 road to its south, and has the village of Llangadfan towards the south-east.

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 20m of drop, based on the 396m summit spot height that appears on the Ordnance Survey 1:50,000 Landranger and the 1:25,000 Explorer map and the 376m bwlch spot height that appears on the Ordnance Survey 1:25,000 Explorer map. 

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

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 396m summit height and a 376m bwlch height, with these values giving this hill 20m of drop, which is sufficient for it to be classified as a Sub-Trichant. 

 

The full details for the hill are: 

Group:  Esgeiriau Gwynion 

Name:  Carreg y Frân 

OS 1:50,000 map:  125

Summit Height:  396m (spot height)                                                           

Summit Grid Reference:  SH 96101 14049 (spot height) 

Bwlch Height:  376m (spot height) 

Bwlch Grid Reference:  SH 95544 14207 (spot height) 

Drop:  2om (spot height summit and bwlch) 

 

Myrddyn Phillips (May 2022)

 

Mapping Mountains - Hill Reclassifications - Y Trichant

Ffridd Eithin (SH 951 133) – Sub-Trichant addition (152nd reclassification)

Significant Name Changes post for Ffridd Eithin

There has been confirmation of 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 confirmed by LIDAR analysis conducted by Myrddyn Phillips. 

LIDAR image of Ffridd Eithin (SH 951 133)

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 Ffridd Eithin and this was derived from the Tithe map, 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 a minor road to its north-east and the A458 road to its south-west, and has the village of Llangadfan towards the south-east.

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 the 339m summit spot height that appears on the Ordnance Survey 1:50,000 Landranger and the 1:25,000 Explorer map and an estimated c 317m bwlch height, based on interpolation of 10m contouring between 310m – 320m. 

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 confirmation of the addition of this hill to Sub-Trichant status is due to LIDAR analysis, resulting in a 339.0m summit height and a 317.5m bwlch height, with these values giving this hill 21.5m of drop, which is sufficient for it to be classified as a Sub-Trichant. 

 

The full details for the hill are: 

Group:  Esgeiriau Gwynion 

Name:  Ffridd Eithin 

OS 1:50,000 map:  125

Summit Height:  339.0m (LIDAR)                                                           

Summit Grid Reference:  SH 95181 13385 (LIDAR) 

Bwlch Height:  317.5m (LIDAR) 

Bwlch Grid Reference:  SH 95059 13719 (LIDAR) 

Drop:  21.5m (LIDAR) 

 

Myrddyn Phillips (May 2022)

 

Mapping Mountains - Hill Reclassifications - Y Trichant

Moel Fron Goch (SJ 008 208) – Sub-Trichant addition (151st reclassification)

Significant Height Revisions post for Moel Fron Goch

There has been confirmation of 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 LIDAR analysis conducted by Myrddyn Phillips. 

LIDAR image of Moel Fron Goch (SJ 008 208)

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 Moel Fron Goch, and it is adjoined to the Foel Cedig group of hills, which are situated in the southern part of North Wales (Region A, Sub-Region A3), and it is positioned with a minor road to its north-east, and the B4393 road and Llyn Efyrnwy (Lake Vyrnwy) to its south, and has the village of Llanwddyn towards the south-east.

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 22m of drop, based on the 333m summit spot height that appears on the Ordnance Survey 1:25,000 Explorer map and the 311m bwlch spot height that appeared on the Ordnance Survey Vector Map Local hosted on the Geograph website and which was entitled the Interactive Coverage Map. 

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 confirmation of the addition of this hill to Sub-Trichant status is due to LIDAR analysis, resulting in a 336.9m summit height and a 310.9m bwlch height, with these values giving this hill 26.0m of drop, which is sufficient for it to be classified as a Sub-Trichant. 

 

The full details for the hill are: 

Group:  Foel Cedig 

Name:  Moel Fron Goch 

OS 1:50,000 map:  125

Summit Height:  336.9m (LIDAR)                                                           

Summit Grid Reference:  SJ 00828 20877 (LIDAR) 

Bwlch Height:  310.9m (LIDAR) 

Bwlch Grid Reference:  SJ 00834 21134 (LIDAR) 

Drop:  26.0m (LIDAR) 

 

Myrddyn Phillips (May 2022)

 

 

Mapping Mountains - Hill Reclassifications - Y Trichant

Craig Orllwyn (SJ 169 262) – Sub-Trichant addition (150th reclassification)

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 Craig Orllwyn, 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 the B4580 road to its north, minor roads to its west and east and the B4396 road to its south, and has the village of Llanrhaeadr-ym-Mochnant towards the 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 21m of drop, based on the 314m summit spot height that appears on the Ordnance Survey 1:25,000 Explorer map and an estimated c 293m bwlch height, based on interpolation of 10m contouring between 290m – 300m. 

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 and digitally updated 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 290m – 295m, with interpolation placing the height of the bwlch as an estimated c 292m, resulting in the drop of this hill being amended to an estimated c 22m.

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 314m summit height and an estimated c 292m 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:  Craig Berwyn 

Name:  Craig Orllwyn 

OS 1:50,000 map:  125

Summit Height:  314m (spot height)                                                           

Summit Grid Reference:  SJ 16944 26202 (spot height) 

Bwlch Height:  c 292m (interpolation) 

Bwlch Grid Reference:  SJ 17317 26244 (interpolation) 

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

 

Myrddyn Phillips (May 2022)

Mapping Mountains - Hill Reclassifications - Y Trichant

Y Foel (SJ 207 315) – Sub-Trichant addition (149th reclassification)

Significant Name Changes post for Y Foel

There has been confirmation of 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 LIDAR analysis conducted by Myrddyn Phillips. 

LIDAR image of Y Fol (SJ 207 315)

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 Y Foel and this was derived from the Ordnance Survey Draft Surveyors map, 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 encircled by minor roads, with the B4500 road farther to its north-west and the B4580 road farther to its south-east, and has the village of Glyn Ceiriog towards the north.

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 26m of drop, based on the 307m summit spot height and the 281m bwlch spot height that appear on the Ordnance Survey 1:25,000 Explorer map. 

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 confirmation of the addition of this hill to Sub-Trichant status is due to LIDAR analysis, resulting in a 307.3m summit height and a 280.7m bwlch height, with these values giving this hill 26.6m of drop, which is sufficient for it to be classified as a Sub-Trichant. 

 

The full details for the hill are: 

Group:  Craig Berwyn 

Name:  Y Foel 

OS 1:50,000 map:  126

Summit Height:  307.3m (LIDAR)                                                           

Summit Grid Reference:  SJ 20741 31551 (LIDAR) 

Bwlch Height:  280.7m (LIDAR) 

Bwlch Grid Reference:  SJ 20979 31667 (LIDAR) 

Drop:  26.6m (LIDAR) 

 

Myrddyn Phillips (April 2022)

Mapping Mountains - Hill Reclassifications - Y Trichant

Rhos (SJ 191 371) – Sub-Trichant addition (148th reclassification)

Significant Name Changes post for Rhos

There has been confirmation of 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 LIDAR analysis conducted by Myrddyn Phillips. 

LIDAR image of Rhos (SJ 191 371)

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 Rhos and this was derived from the Ordnance Survey Draft Surveyors map, 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 encircled by minor roads with the B4500 road farther to its east, and has the village of Glyn Ceiriog towards the north-east. 

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 26m of drop, based on the 377m summit spot height that appears on the Ordnance Survey 1:50,000 Landranger map and the 1:25,000 Explorer map and the 351m bwlch spot height that appears on the Ordnance Survey 1:25,000 Explorer map, with these values giving this hill 26m of drop. 

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 confirmation of the addition of this hill to Sub-Trichant status is due to LIDAR analysis, resulting in a 378.9m summit height and a 351.8m bwlch height, with these values giving this hill 27.2m of drop, which is sufficient for it to be classified as a Sub-Trichant. 

 

The full details for the hill are: 

Group:  Craig Berwyn 

Name:  Rhos 

OS 1:50,000 map:  125

Summit Height:  378.9m (LIDAR)                                                           

Summit Grid Reference:  SJ 19136 37199 (LIDAR) 

Bwlch Height:  351.8m (LIDAR) 

Bwlch Grid Reference:  SJ 18658 37474 (LIDAR) 

Drop:  27.2m (LIDAR) 

 

Myrddyn Phillips (April 2022)

Mapping Mountains - Hill Reclassifications - Y Trichant

Moel Heulog (SH 987 353) – Sub-Trichant reclassified to Trichant (147th reclassification)

Survey post for Moel Heulog

There has been confirmation of a reclassification 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 confirmed by a Trimble GeoXH 6000 survey conducted by Myrddyn Phillips. 

Moel Heulog (SH 987 353)

The criteria for the list that this reclassification 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 Moel Heulog and it is adjoined to the Foel Cedig group of hills, which are situated in the southern part of North Wales (Region A, Sub-Region A3), and it is positioned with the B4402 road to its north-west, the B4391 road to its south and a minor road to its east, and has the town of Y Bala towards the west. 

When the original 300m height band of Welsh P30 hills were published on Geoff Crowder’s v-g.me website, this hill was included in the Hills to be surveyed sub list, as it was considered not to meet the criteria then used for the main P30 category. 

When 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 29m of drop, based on the 376m summit spot height that appears on the Ordnance Survey 1:25,000 Explorer map and an estimated c 347m bwlch height, based on interpolation of 10m contouring between 340m – 350m. 

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 and digitally updated such as the interactive mapping on the Magic Maps and WalkLakes websites. 

The details for this hill were re-assessed when the Ordnance Survey Vector Map Local hosted on the Geograph website and which was entitled the Interactive Coverage Map became available online.  This mapping had many spot heights not on other publicly available Ordnance Survey maps and for this hill it had a 346m bwlch spot height and when coupled with the 376m summit spot height, these values gave this hill 30m of drop. 

Gathering data at the bwlch of Moel Heulog

Gathering data at the summit of Moel Heulog

Therefore, the confirmation of the reclassification of this hill from Sub-Trichant status is due to a Trimble GeoXH 6000 survey, resulting in a 377.8m summit height and a 347.0m bwlch height, with these values giving this hill 30.7m of drop, which is sufficient for it to be classified as a Trichant. 

 

The full details for the hill are: 

Group:  Foel Cedig 

Name:  Moel Heulog 

OS 1:50,000 map:  125

Summit Height:  377.8m (converted to OSGM15, Trimble GeoXH 6000)

Summit Grid Reference:  SH 98750 35398 (Trimble GeoXH 6000) 

Bwlch Height:  347.0m (converted to OSGM15, Trimble GeoXH 6000) 

Bwlch Grid Reference:  SH 98941 35209 (Trimble GeoXH 6000) 

Drop:  30.7m (Trimble GeoXH 6000) 

 

Myrddyn Phillips (April 2022)

Mapping Mountains - Hill Reclassifications - Y Trichant

Cefn Uchaf (SJ 249 402) – Sub-Trichant addition (146th reclassification)

Significant Name Changes post for Cefn Uchaf

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 Cefn Uchaf and this was derived from the Ordnance Survey Draft Surveyors map, 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 encircled by minor roads with the A5 road farther to its north and the B4500 road farther to its south, and has the town of Llangollen towards the west north-west. 

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

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. 

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

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 21m of drop, based on the 395m summit spot height that appears on the Ordnance Survey 1:50,000 Landranger map and an estimated c 374m bwlch height, based on interpolation of 5m contouring between 370m – 375m, with the 395m summit height also given on the interactive mapping hosted on the WalkLakes website. 

Extract from the interactive mapping on the WalkLakes 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 395m summit height and an estimated c 374m bwlch height, with these values giving this hill an estimated c 21m of drop, which is sufficient for it to be classified as a Sub-Trichant. 

 

The full details for the hill are: 

Group:  Craig Berwyn 

Name:  Cefn Uchaf 

OS 1:50,000 map:  117

Summit Height:  395m (spot height)                                                           

Summit Grid Reference:  SJ 24921 40228 (spot height) 

Bwlch Height:  c 374 (interpolation) 

Bwlch Grid Reference:  SJ 24502 40242 (interpolation) 

Drop:  c 21m (spot height summit and interpolated bwlch) 

 

Myrddyn Phillips (April 2022)

Mapping Mountains - Hill Reclassifications - Y Trichant

Ffridd (SH 727 045) – Sub-Trichant addition (145th reclassification)

Significant Name Changes post for Ffridd

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 Ffridd and this was derived from the Tithe map, and it is adjoined to the Tarren y Gesail group of hills, which are situated in the south-western part of North Wales (Region A, Sub-Region A3), and it is positioned with the A493 road to its south and the A487 road to its east, and has the town of Machynlleth towards the south south-east. 

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. 

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 and digitally updated such as the interactive mapping on the Magic Maps and WalkLakes websites. 

After the sub list was standardised, and interpolated heights and drop values also included the details for this hill were re-evaluated against the Ordnance Survey Vector Map Local hosted on the Geograph website and which was entitled the Interactive Coverage Map.  This mapping had many spot heights not on other publicly available maps and for this hill it had a 332m summit spot height which matches the spot height given on the Ordnance Survey 1:50,000 Landranger map, and a 314m spot height on the area of the bwlch, with the latter positioned at SH 72590 04546, with these values giving this hill 18m of drop. 

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

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 310m – 315m, with interpolation placing the height of the bwlch as an estimated c 312m, with these contours also represented on other 5m contouring available online.  This estimated height is now prioritised over the 314m spot height on the old Interactive Coverage Map which 5m contouring positions on the upward slope on the hill to hill traverse and therefore not at the critical point of the bwlch. 

Extract from the interactive 5m contouring

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 332m summit height and an estimated c 312m bwlch height, with these values giving this hill an estimated c 20m of drop, which is sufficient for it to be classified as a Sub-Trichant. 

 

The full details for the hill are: 

Group:  Tarren y Gesail 

Name:  Ffridd 

OS 1:50,000 map:  135

Summit Height:  332m (spot height)                                                           

Summit Grid Reference:  SH 72758 04535 (spot height) 

Bwlch Height:  c 312m (interpolation) 

Bwlch Grid Reference:  SH 72624 04549 (interpolation) 

Drop:  c 20m (spot height summit and interpolated bwlch) 

 

Myrddyn Phillips (March 2022)

Mapping Mountains - Hill Reclassifications - Y Trichant

Bryn Dinas (SN 646 999) – Trichant reclassified to Sub-Trichant (144th reclassification)

Survey post for Bryn Dinas

There has been confirmation of a reclassification 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 a Trimble GeoXH 6000 survey conducted by Myrddyn Phillips.

Bryn Dinas (SN 646 999)

The criteria for the list that this reclassification 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 Bryn Dinas and it is adjoined to the Tarren y Gesail group of hills, which are situated in the south-western part of North Wales (Region A, Sub-Region A3), and it is positioned with a minor road to its south and the A493 road to its west and farther south, and has the town of Tywyn towards the west. 

When the original 300m height band of Welsh P30 hills were published on Geoff Crowder’s v-g.me website, this hill was included in the Hills to be surveyed sub list, as it was considered not to meet the criteria then used for the main P30 category. 

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

When 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 30m of drop, based on the 346m summit spot height that appears on the Ordnance Survey 1:25,000 Explorer map and an estimated c 316m bwlch height, based on interpolation of 10m contouring between 310m – 320m.  The estimated c 316m bwlch height was based on the 317m spot height that appears adjoined to a cairn on the Ordnance Survey 1:50,000 Landranger map.  If this height was taken to the top of the cairn, ground at its base would be approximately c 316m in height. 

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 and digitally updated such as the interactive mapping on the Magic Maps and WalkLakes websites. 

The details for this hill were re-assessed when the Ordnance Survey Vector Map Local hosted on the Geograph website and which was entitled the Interactive Coverage Map became available online.  This mapping had many spot heights not on other publicly available Ordnance Survey maps and for this hill it had a 318m spot height on the area of the bwlch positioned on a track at SN 64653 00072. 

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 315m – 320m, with interpolation placing the height of the bwlch as an estimated c 317m, and when coupled with the 318m spot height on the Interactive Coverage Map it was decided to amend the drop value for this hill to an estimated c 29m. 

Gathering data at the bwlch of Bryn Dinas

Gathering data at the summit of Bryn Dinas

Therefore, the confirmation of the reclassification of this hill to Sub-Trichant status is due to a Trimble GeoXH 6000 survey, resulting in a 345.6m summit height and a 315.8m bwlch height, with these values giving this hill 29.8m of drop, which is insufficient for it to be classified as a Trichant.

The full details for the hill are: 

Group:  Tarren y Gesail 

Name:  Bryn Dinas 

OS 1:50,000 map:  135

Summit Height:  345.6m (converted to OSGM15)                                                           

Summit Grid Reference:  SN 64662 99930 

Bwlch Height:  315.8m (converted to OSGM15) 

Bwlch Grid Reference:  SH 64694 00067 

Drop:  29.8m 

 

Myrddyn Phillips (March 2022)

Mapping Mountains - Hill Reclassifications - Y Trichant

Ffridd Esgair Weddan (SH 682 018) – Sub-Trichant reclassified to Trichant (143rd reclassification)

There has been confirmation of a reclassification 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 reclassification 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 Ffridd Esgair Weddan and it is adjoined to the Tarren y Gesail group of hills, which are situated in the south-western part of North Wales (Region A, Sub-Region A3), and it is positioned with the B4405 road to its north-west, the A493 road to its south and the A487 road to its east north-east, and has the town of Machynlleth towards the east. 

When the original 300m height band of Welsh P30 hills were published on Geoff Crowder’s v-g.me website, this hill was included in the Hills to be surveyed sub list, as it was considered not to meet the criteria then used for the main P30 category. 

When 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 32m of drop, based on the 326m summit spot height that appears on the Ordnance Survey 1:25,000 Explorer map and an estimated c 294m bwlch height, based on interpolation of 10m contouring between 290m – 300m. 

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 and digitally updated 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 290m – 295m, with interpolation placing the height of the bwlch as an estimated c 293m, resulting in the drop value for this hill being amended to an estimated c 33m. 

Therefore, the reclassification of this hill from Sub-Trichant status is due to detail on contemporary maps produced from Ordnance Survey data, resulting in a 326m summit height and an estimated c 293m bwlch height, with these values giving this hill an estimated c 33m of drop, which is sufficient for it to be classified as a Trichant. 

 

The full details for the hill are: 

Group:  Tarren y Gesail 

Name:  Ffridd Esgair Weddan 

OS 1:50,000 map:  135

Summit Height:  326m (spot height)                                                           

Summit Grid Reference:  SH 68242 01847 (hand-held GPS via DoBIH) 

Bwlch Height:  c 293m (interpolation) 

Bwlch Grid Reference:  SH 68185 02014 (interpolation) 

Drop:  c 33m (spot height summit and interpolated bwlch) 

 

Myrddyn Phillips (March 2022)

Mapping Mountains - Hill Reclassifications - Y Trichant

Cwmcroyddir (SN 736 409) – Sub-Trichant reclassified to Trichant (142nd reclassification)

Significant Name Changes post for Cwmcroyddir

There has been confirmation of a reclassification 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 LIDAR analysis conducted by Myrddyn Phillips. 

LIDAR image of Cwmcroyddir (SN 736 409)

The criteria for the list that this reclassification 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 Mountainspublication 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 Cwmcroyddir and this was derived from the Tithe map, and it is adjoined to the Mynydd Mallaen group of hills, which are situated in the central part of South Wales (Region B, Sub-Region B1), and it is positioned with minor roads to its south and east, the A482 road farther to its south-west and the A483 road farther to its south-east, and has the town of Llanymddyfri (Llandovery) towards the south-south-east. 

When the original 300m height band of Welsh P30 hills were published on Geoff Crowder’s v-g.me website, this hill was included in the Hills to be surveyed sub list, as it was considered not to meet the criteria then used for the main P30 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 31m of drop, based on the 348m summit spot height that appears on the Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map and an estimated c 317m bwlch height, based on interpolation of 10m contouring between 310m – 320m. 

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. 

The details for this hill were re-assessed when the Ordnance Survey Vector Map Local hosted on the Geograph website and which was entitled the Interactive Coverage Map became available online.  This mapping had many spot heights not on other publicly available Ordnance Survey maps and for this hill it had a 316m bwlch spot height and when coupled with the 348m summit spot height, these values gave this hill 32m of drop. 

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 confirmation of the reclassification of this hill from Sub-Trichant status is due to LIDAR analysis, resulting in a 348.6m summit height and a 316.4m bwlch height, with these values giving this hill 32.2m of drop, which is sufficient for it to be classified as a Trichant. 

 

The full details for the hill are: 

Group:  Mynydd Mallaen 

Name:  Cwmcroyddir 

OS 1:50,000 map:  146, 147, 160

Summit Height:  348.6m (LIDAR)                                                           

Summit Grid Reference:  SN 73605 40961 (LIDAR) 

Bwlch Height:  316.4m (LIDAR) 

Bwlch Grid Reference:  SN 73461 41222 (LIDAR) 

Drop:  32.2m (LIDAR) 

 

Myrddyn Phillips (March 2022)

 

Mapping Mountains - Hill Reclassifications - Y Trichant

Ffridd y Waun (SH 689 170) – Sub-Trichant addition (141st reclassification)

Significant Name Changes post for Ffridd y Waun

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 LIDAR analysis conducted by Myrddyn Phillips. 

LIDAR image of Ffridd y Waun (SH 689 170)

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 Ffridd y Waun and this was derived from local enquiry, and it is adjoined to the Cadair Idris group of hills, which are situated in the south-western part of North Wales (Region A, Sub-Region A3), and it is positioned with the A493 road to its north and minor roads to its south-west and south-east, and has town of Dolgellau towards the east. 

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 17m of drop, based on an estimated c 301m summit height and an estimated c 284m 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

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 Sub-Trichant status is due to LIDAR analysis, resulting in a 300.9m summit height and a 280.8m bwlch height, with these values giving this hill 20.1m of drop, which is sufficient for it to be classified as a Sub-Trichant. 

 

The full details for the hill are: 

Group:  Cadair Idris 

Name:  Ffridd y Waun 

OS 1:50,000 map:  124

Summit Height:  300.9m (LIDAR)                                                           

Summit Grid Reference:  SH 68949 17020 (LIDAR) 

Bwlch Height:  280.8m (LIDAR) 

Bwlch Grid Reference:  SH 68971 17068 (LIDAR) 

Drop:  20.1m (LIDAR) 

 

Myrddyn Phillips (March 2022)