Mapping Mountains – Significant Name Changes – The Welsh P15s

 

Llanlleiana Park (SH 386 946) 

There has been a Significant Name Change to a hill that is listed in The Welsh P15s, with the summit height, bwlch height and their locations, the drop and status of the hill derived from detail on contemporary maps produced from Ordnance Survey data. 

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

The Welsh P15s – Welsh hills with 15m minimum drop, irrespective of their height, with an accompanying sub list entitled the Welsh Sub-P15s, with the criteria for this sub category being all Welsh hills with 14m or more and below 15m of drop.  The list is authored by Myrddyn Phillips, with the Introduction to the list appearing on Mapping Mountains on the 10^th May 2019. 

The Welsh P15s by Myrddyn Phillips

The hill is adjoined to the Ynys Môn group of hills, which are situated in the north-western part of North Wales (Region A, Sub-Region A1), and it is positioned with the coast to its north, a minor road and the A5025 road farther to its south, and has the village of Cemaes towards the south-west. 

When the listing that became known as The Welsh P15s was being compiled, this hill was listed under the point (Pt. 44m) notation with an estimated c 16m of drop, based on the 44m 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 28m bwlch height based on interpolation of 5m contouring between 25m – 30m that appear on the Ordnance Survey 1:25,000 Explorer map. 

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

The details for this hill have subsequently been re-assessed against the current Ordnance Survey interactive map hosted on the Geograph website which gives a 46m summit spot height, and current 5m contouring at the bwlch between 30m – 35m and which is estimated as c 32m, with these values giving this hill an estimated c 14m of drop. 

As the summit of this hill comprises bounded land the details for it were examined on the Tithe map.  The term Tithe map is generally given to a map of a Welsh or English parish or township and which was prepared after the 1836 Tithe Commutation Act.  This act allowed tithes to be paid in cash rather than goods.  The Tithe maps gave names of owners and occupiers of land in each parish and importantly for place-name research they also included the name of enclosed land.  This enclosed land is usually based on a field system, however not every field is given a name, but many are and especially so in Wales. 

Extract from the Tithe map

The enclosed land where the summit of this hill is situated is given the number 248a on the Tithe map, this can be cross referenced against the apportionments; it is these apportionments that give the name of the owner or occupier of the land as well as the name of the land.  The land where the summit of this hill is situated is named as Llanlleiana Park in the apportionments, with the details on the Tithe map appearing in the parish of Amlwch and in the county named as Anglesey. 

Extract from the apportionments

Therefore, the name this hill is now listed by in The Welsh P15s is Llanlleiana Park and this was derived from the Tithe map. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Llanlleiana Park

Previously Listed Name:  Pt. 44m 

OS 1:50,000 map:  114

Summit Height:  46m (spot height)                                                           

Summit Grid Reference:  SH 38614 94695 (spot height) 

Bwlch Height:  c 32m (interpolation) 

Bwlch Grid Reference:  SH 38606 94628 (interpolation) 

Drop:  c 14m (spot height summit and interpolated bwlch) 

 

Myrddyn Phillips (July 2021)

 

 

 

 

 

Mapping Mountains – Significant Height Revisions – The Welsh P15s

Llanlleiana Park (SH 386 946) 

There has been a Significant Height Revision to a hill that is listed in The Welsh P15s, 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 height revision applies to are:

The Welsh P15s – Welsh hills with 15m minimum drop, irrespective of their height, with an accompanying sub list entitled the Welsh Sub-P15s, with the criteria for this sub category being all Welsh hills with 14m or more and below 15m of drop.  The list is authored by Myrddyn Phillips, with the Introduction to the list appearing on Mapping Mountains on the 10^th May 2019. 

The Welsh P15s by Myrddyn Phillips

The name the hill is listed by is Llanlleiana Park and this was derived from the Tithe map and it is adjoined to the Ynys Môn group of hills, which are situated in the north-western part of North Wales (Region A, Sub-Region A1), and it is positioned with the coast to its north, a minor road and the A5025 road farther to its south, and has the village of Cemaes towards the south-west. 

When the listing that became known as The Welsh P15s was being compiled, this hill was included in the main P15 list with an estimated c 16m of drop, based on the 44m 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 28m bwlch height based on interpolation of 5m contouring between 25m – 30m that appear on the Ordnance Survey 1:25,000 Explorer map. 

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

The details for this hill have subsequently been re-assessed against the current Ordnance Survey interactive map hosted on the Geograph website which gives a 46m summit spot height, and current 5m contouring at the bwlch which is between 30m – 35m and estimated as c 32m, with these values giving this hill an estimated c 14m of drop, and this comes within the parameters of the Significant Height Revisions used within this page heading, these parameters are: 

The term Significant Height Revisions applies to any listed hill whose interpolated height and Ordnance Survey or Harvey map summit spot height has a 2m or more discrepancy when compared to the survey result produced by the Trimble GeoXH 6000 or analysis of data produced via LIDAR, also included are hills whose summit map data is missing an uppermost ring contour when compared to the data produced by the Trimble or by LIDAR analysis. 

Extract from the Ordnance Survey interactive mapping hosted on the Geograph website

Therefore, this hill’s new listed summit height is 46m and this was derived from the Ordnance Survey interactive map hosted on the Geograph website, this is 2m higher than the previous listed summit height of 44m which appeared as a spot height on the Ordnance Survey Vector Map Local hosted on the Geograph website and which was entitled the Interactive Coverage Map. 

 

ills of Wales, and are reproduced below@

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Llanlleiana Park 

OS 1:50,000 map:  114

Summit Height (New Height):  46m (spot height)                                                           

Summit Grid Reference:  SH 38614 94695 (spot height) 

Bwlch Height:  c 32m (interpolation) 

Bwlch Grid Reference:  SH 38606 94628 (interpolation) 

Drop:  c 14m (spot height summit and interpolated bwlch) 

 

Myrddyn Phillips (July 2021)

 

 

 

 

 

 

  

Mapping Mountains – Hill Reclassifications – The Welsh P15s

Llanlleiana Park (SH 386 946) – Welsh P15 reclassified to Welsh Sub-P15

There has been a reclassification to the list of The Welsh P15s, 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: 

The Welsh P15s – Welsh hills with 15m minimum drop, irrespective of their height, with an accompanying sub list entitled the Welsh Sub-P15s, with the criteria for this sub category being all Welsh hills with 14m or more and below 15m of drop.  The list is authored by Myrddyn Phillips, with the Introduction to the list appearing on Mapping Mountains on the 10^th May 2019. 

The Welsh P15s by Myrddyn Phillips

The name the hill is listed by is Llanlleiana Park and this was derived from the Tithe map and it is adjoined to the Ynys Môn group of hills, which are situated in the north-western part of North Wales (Region A, Sub-Region A1), and it is positioned with the coast to its north, a minor road and the A5025 road farther to its south, and has the village of Cemaes towards the south-west. 

When the listing that became known as The Welsh P15s was being compiled, this hill was included in the main P15 list with an estimated c 16m of drop, based on the 44m 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 28m bwlch height based on interpolation of 5m contouring between 25m – 30m that appear on the Ordnance Survey 1:25,000 Explorer map. 

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

The details for this hill have subsequently been re-assessed against the current Ordnance Survey interactive map hosted on the Geograph website which gives a 46m summit spot height, and current 5m contouring at the bwlch which is between 30m – 35m and estimated as c 32m, with these values giving this hill an estimated c 14m of drop. 

Extract from the Ordnance Survey interactive mapping hosted on the Geograph website

Therefore, the reclassification of this hill to Welsh Sub-P15 status is due to detail on contemporary maps produced from Ordnance Survey data, resulting in a 46m summit height and an estimated c 32m bwlch height, with these values giving this hill an estimated c 14m of drop, which is insufficient for it to be included in the main list of The Welsh P15s. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Llanlleiana Park 

OS 1:50,000 map:  114

Summit Height:  46m (spot height)                                                           

Summit Grid Reference:  SH 38614 94695 (spot height) 

Bwlch Height:  c 32m (interpolation) 

Bwlch Grid Reference:  SH 38606 94628 (interpolation) 

Drop:  c 14m (spot height summit and interpolated bwlch) 

 

Myrddyn Phillips (July 2021)

 

 

 

 

 

  

Mapping Mountains – Significant Name Changes – The Welsh P15s

 

Llanlleiana Park (SH 388 946) 

There has been a Significant Name Change to a hill that is listed in The Welsh P15s, with the summit height, bwlch height and their locations, the drop and status of the hill derived from detail on contemporary maps produced from Ordnance Survey data. 

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

The Welsh P15s – Welsh hills with 15m minimum drop, irrespective of their height, with an accompanying sub list entitled the Welsh Sub-P15s, with the criteria for this sub category being all Welsh hills with 14m or more and below 15m of drop.  The list is authored by Myrddyn Phillips, with the Introduction to the list appearing on Mapping Mountains on the 10^th May 2019. 

The Welsh P15s by Myrddyn Phillips

The hill is adjoined to the Ynys Môn group of hills, which are situated in the north-western part of North Wales (Region A, Sub-Region A1), and it is positioned with the coast to its north, a minor road to its south and the A5025 road farther to its south, and has the village of Cemaes towards the south-west. 

When the listing that became known as The Welsh P15s was being compiled, this hill was listed under the point (Pt. c 52m) notation with an estimated c 15m of drop based on an estimated c 52m summit height and an estimated c 37m bwlch height, with both heights based on interpolation of 5m contouring that appears on the Ordnance 1:25,000 Explorer map. 

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

As the summit of this hill comprises bounded land the details for it were examined on the Tithe map.  The term Tithe map is generally given to a map of a Welsh or English parish or township and which was prepared after the 1836 Tithe Commutation Act.  This act allowed tithes to be paid in cash rather than goods.  The Tithe maps gave names of owners and occupiers of land in each parish and importantly for place-name research they also included the name of enclosed land.  This enclosed land is usually based on a field system, however not every field is given a name, but many are and especially so in Wales. 

Extract from the Tithe map

The enclosed land where the summit of this hill is situated is given the number 248a on the Tithe map, this can be cross referenced against the apportionments; it is these apportionments that give the name of the owner or occupier of the land as well as the name of the land.  The land where the summit of this hill is situated is named as Llanlleiana Park in the apportionments, with the details on the Tithe map appearing in the parish of Amlwch and in the county named as Anglesey. 

Extract from the apportionments

Therefore, the name this hill is now listed by in The Welsh P15s is Llanlleiana Park and this was derived from the Tithe map. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Llanlleiana Park

Previously Listed Name:  Pt. c 52m 

OS 1:50,000 map:  114

Summit Height:  55m (spot height) 

Summit Grid Reference:  SH 38859 94607 (spot height) 

Bwlch Height:  c 38m (interpolation) 

Bwlch Grid Reference:  SH 38902 94509 (interpolation) 

Drop:  c 17m (spot height summit and interpolated bwlch) 

 

Myrddyn Phillips (July 2021)

 

 

 

 

Mapping Mountains – Significant Height Revisions – The Welsh P15s

Llanlleiana Park (SH 388 946) 

There has been a Significant Height Revision to a hill that is listed in The Welsh P15s, 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 height revision applies to are:

The Welsh P15s – Welsh hills with 15m minimum drop, irrespective of their height, with an accompanying sub list entitled the Welsh Sub-P15s, with the criteria for this sub category being all Welsh hills with 14m or more and below 15m of drop.  The list is authored by Myrddyn Phillips, with the Introduction to the list appearing on Mapping Mountains on the 10^th May 2019. 

The Welsh P15s by Myrddyn Phillips

The name the hill is listed by is Llanlleiana Park and this was derived from the Tithe map and it is adjoined to the Ynys Môn group of hills, which are situated in the north-western part of North Wales (Region A, Sub-Region A1), and it is positioned with the coast to its north, a minor road to its south and the A5025 road farther to its south, and has the village of Cemaes towards the south-west. 

When the listing that became known as The Welsh P15s was being compiled, this hill was listed with an estimated c 15m of drop based on an estimated c 52m summit height and an estimated c 37m bwlch height, with both heights based on interpolation of 5m contouring that appears on the Ordnance 1:25,000 Explorer map. 

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

The details for this hill have been re-evaluated and it is now listed with a 55m summit height, based on the spot height that appears on the Ordnance Survey interactive mapping hosted on the Geograph website, and this comes within the parameters of the Significant Height Revisions used within this page heading, these parameters are: 

The term Significant Height Revisions applies to any listed hill whose interpolated height and Ordnance Survey or Harvey map summit spot height has a 2m or more discrepancy when compared to the survey result produced by the Trimble GeoXH 6000 or analysis of data produced via LIDAR, also included are hills whose summit map data is missing an uppermost ring contour when compared to the data produced by the Trimble or by LIDAR analysis. 

Extract from the Ordnance Survey interactive mapping hosted on the Geograph website

Therefore, this hill’s new listed summit height is 55m and this was derived from the summit spot height that appears on the Ordnance Survey interactive mapping hosted on the Geograph website, this is 3m higher than the previous listed summit height of c 52m which was based on interpolation of the uppermost 50m ring contour that appears on the Ordnance Survey 1:25,000 Explorer map. 

 

ills of Wales, and are reproduced below@

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Llanlleiana Park 

OS 1:50,000 map:  114

Summit Height (New Height):  55m (spot height) 

Summit Grid Reference:  SH 38859 94607 (spot height) 

Bwlch Height:  c 38m (interpolation) 

Bwlch Grid Reference:  SH 38902 94509 (interpolation) 

Drop:  c 17m (spot height summit and interpolated bwlch) 

 

Myrddyn Phillips (July 2021)

 

 

 

 

 

 

  

Mapping Mountains – Significant Name Changes – 30-99m Twmpau and Y Trechol – The Dominant Hills of Wales

 

Llanlleiana Park (SH 383 949) 

There has been a Significant Name Change to a hill that is listed in the 30-99m Twmpau and Y Trechol – The Dominant Hills of Wales, with the summit height, bwlch height and their locations, the drop, dominance and status of the hill derived from a Trimble GeoXH 6000 survey conducted by Myrddyn Phillips. 

Llanlleiana Park (SH 383 949)

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

30-99m Twmpau - Welsh hills at or above 30m and below 100m in height with 30m minimum drop, with an accompanying sub list entitled the 30-99m Sub-Twmpau with the criteria for this sub category being all Welsh hills at or above 30m and below 100m in height with 20m or more and below 30m of drop, with the word Twmpau being an acronym standing for thirty welsh metre prominences and upward. 

The 30-99m Twmpau by Myrddyn Phillips

Y Trechol – The Dominant Hills of Wales – Welsh P30 hills whose prominence equal or exceed half that of their absolute height.  With the criteria for Lesser Dominant status being those additional Welsh P30 hills whose prominence is between one third and half that of their absolute height.  The list is authored by Myrddyn Phillips with the Introduction to the start of the Mapping Mountains publication of this list appearing on the 3^rd December 2015, and which is now available in its entirety on Mapping Mountains in Google Doc format. 

Y Trechol - The Dominant Hills of Wales by Myrddyn Phillips

The hill is adjoined to the Ynys Môn group of hills, which are situated in the north-western part of North Wales (Region A, Sub-Region A1), and it is positioned with the coast immediately to its north and a minor road to its south with the A5025 road farther to its south, and has the village of Cemaes towards the south-west. 

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

The hill appeared in the original 30-99m Welsh P30 list on Geoff Crowder’s v-g.me website under the invented and transposed name of Moel Llanlleiana, with an accompanying note staying; Name from buildings to the South-East.

Moel Llanlleiana

65c

SH383950

114

262

Name from buildings to the South-East

 

During my early hill listing I thought it appropriate to either invent a name for a hill, or use a name that appeared near to the summit of the hill on Ordnance Survey maps of the day.  My preference was to use farm names and put Pen, Bryn or Moel in front of them.  This is not a practice that I now advocate as with time and inclination place-name data can be improved either by asking local people or by examining historic documents, through this form of research an appropriate name for the hill can usually be found. 

As the summit of this hill comprises bounded land the details for it were examined on the Tithe map.  The term Tithe map is generally given to a map of a Welsh or English parish or township and which was prepared after the 1836 Tithe Commutation Act.  This act allowed tithes to be paid in cash rather than goods.  The Tithe maps gave names of owners and occupiers of land in each parish and importantly for place-name research they also included the name of enclosed land.  This enclosed land is usually based on a field system, however not every field is given a name, but many are and especially so in Wales. 

Extract from the Tithe map

The enclosed land where the summit of this hill is situated is given the number 248 on the Tithe map, this can be cross referenced against the apportionments; it is these apportionments that give the name of the owner or occupier of the land as well as the name of the land.  The land where the summit of this hill is situated is named as Llanlleiana Park in the apportionments, with the details on the Tithe map appearing in the parish of Amlwch and in the county named as Anglesey. 

Extract from the apportionments

Therefore, the name this hill is now listed by in the 30-99m Twmpau and Y Trechol – The Dominant Hills of Wales is Llanlleiana Park, and this name was derived from the Tithe map. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Llanlleiana Park

Previously Listed Name:  Moel Llanlleiana 

OS 1:50,000 map:  114

Summit Height:  68.2m (converted to OSGM15) 

Summit Grid Reference:  SH 38337 94993 

Bwlch Height:  34.2m (converted to OSGM15) 

Bwlch Grid Reference:  SH 38745 94536 

Drop:  34.0m 

Dominance:  49.85%

 

Myrddyn Phillips (March 2021)