Summit Relocations



For the latest news on any summit relocation due to a survey conducted with the Trimble GeoXH 6000 consult the Home page under the post heading Mapping Mountains Trimble Surveys or click {here} for the detailed Trimble Survey Spreadsheet.

This part of the Mapping Mountains blog is dedicated to any major summit relocation for the listings that I have been a part of; these can be for position and for feature.  These include ones found from map detail as well as those from accurate surveying. 
 



Mapping Mountains – Summit Relocations – Y Pedwarau and Y Pellennig


Esgair Cerrig (SN 952 432)

This is the thirtieth post under the heading of Summit Relocations, with the survey that resulted in the following details taking place on the 28th December 2016 in good, clear and bright conditions.

The thirtieth major summit relocation partly initiated from a survey with the Trimble GeoXH 6000 was conducted in the Mynydd Epynt hills, this hill range is situated in the south-eastern part of Mid and West Wales (Region B, Sub-Region B2), and the hill is positioned above the small community of Llangamarch (Llangammarch Wells) to its north north-west and the small town of Llanwrtyd (Llanwrtyd Wells) to its west north-west. 

The name of the hill is Esgair Cerrig and this was derived from local enquiry (see Significant Name Changes) and access to it is restricted due to it being positioned within the confines of the Sennybridge Artillery Range Training Area.

Esgair Cerrig is listed as a Pedwar (‘Y Pedwarau’ Europeaklist May 2013 and Haroldstreet January 2014), these are the Welsh 400m hills with 30m minimum drop, and also as a Pellennig, these are the Welsh hills whose summit is 2.5km or more from the nearest paved public road and the hill has a minimum drop of 15m.  This hill’s summit position was previously given as SN 956 435 and this is where the current 456m spot height appears on Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer maps. 

However, prior to the survey with the Trimble GeoXH 6000 this hill’s summit was analysed using LIDAR data by Aled Williams.  LIDAR (Light Detection & Ranging) is highly accurate height data that is now freely available for much of England and Wales.
Aled’s analysis of LIDAR data gives the hill the following details:


Esgair Cerrig

Summit Height:  456.3m

Summit Grid Reference:  SN 95226 43298


The analysis of LIDAR data pinpointed this hill’s position and its height was confirmed with the Trimble survey:


Esgair Cerrig

Summit Height:  456.4m

Summit Grid Reference:  SN 95224 43297 
    

Therefore the position of the relocated summit is at SN 95224 43297 and is featureless ground consisting of grass and reed grass beside a bomb crater, this position is within the uppermost 450m ring contour on Ordnance Survey maps although no spot height is given to it, the relocated summit is approximately 490 metres south-westward from where the previously listed summit is positioned.


The full details for the hill are:

Cardinal Hill:  Clepyn Melyn

Summit Height:  456.4m (converted to OSGM15)

Name:  Esgair Cerrig

OS 1:50,000 map:  147, 160

Summit Grid Reference (New Position):  SN 95224 43297 
     
Drop:  35.6m


The Trimble GeoXH 6000 gathering data at the summit of Esgair Cerrig, with the old position of the summit in the centre background of this photograph
.



Myrddyn Phillips and Aled Williams (January 2017)






Mapping Mountains – Summit Relocations – The Fours


Willstone Hill (SO 485 943)

This is the twenty ninth post under the heading of Summit Relocations, with the survey that resulted in the following details taking place on the 24th September 2016 in good, clear albeit windy conditions in the company of Mark Trengove who had suggested the walk, and Bob Kerr.

The twenty ninth major summit relocation initiated from a survey with the Trimble GeoXH 6000 was conducted in the hills of the Long Mynd, with the hill positioned between the town of Church Stretton to the west south-west and the small community of Cardington to the east north-east.

The hill is listed as a Sub-Four (The Fours published by Europeaklist and Haroldstreet), these are the English 400m hills with 30m minimum drop, with Sub-Fours being those hills that have a minimum 20m and under 30m of drop.

The name of the hill is Willstone Hill and its previously listed summit position corresponded with where the 403m spot height appears on Ordnance Survey 1:25,000 Explorer maps, this is at SO 48528 94341.  This point is on grassed heathland which forms a part of this hill’s rounded summit.  However, as with many hills in this area Willstone Hill has an attractive small outcrop of volcanic rock situated on it.  This rock outcrop is positioned on the northern extremity of the summit area and its high point was Trimbled as being 404.7m (404.650m) high compared to the high point of the adjacent rounded summit; 404.0m (404.024m).

This is not a dramatic relocation in distance from the old to the new summit, but the relocation from the rounded heathland summit to the rock outcrop necessitates a Summit Relocation post, and therefore the position of the relocated summit is at SO 48564 94370 and is the top of a small rock outcrop, this is not given a spot height on current Ordnance Survey maps but the Trimble result gave it as 0.63m higher when compared to the high point of its adjacent heathland top.


The full details for the hill are:

Cardinal Hill:  Stiperstones

Summit Height:  404.7m

Name:  Willstone Hill

OS 1:50,000 map:  137, 138

Summit Grid Reference (New Position):  SO 48564 94370
  
Drop:  22.4m



The Trimble GeoXH 6000 gathering data at the high point of the rounded heath land top of Willstone Hill, with the new summit of the hill at the top of the rock outcrop on the left of this photograph



Myrddyn Phillips and Aled Williams (October 2016)





Mapping Mountains – Summit Relocations – Yr Uchafion and 500m Twmpau

This is the twenty eighth post under the heading of Summit Relocations, with the Trimble survey that resulted in this summit relocation being conducted on the 23rd July 2016 in good, clear and sheltered conditions.

The twenty eighth summit relocation initiated from a survey with the Trimble GeoXH 6000 was conducted in the range of hills known as the Cymoedd, these are the hills associated with the south Wales valleys.  The hill is situated between Cwm Ogwr Fawr to its west and the Rhondda Fawr valley to its east and is positioned above the towns of Treorci (Treorchy) and Treherbert to its north and Nant-y-moel, Price Town and Ogmore Vale to its south-west.

Access to the hill is relatively easy as a track leaves the A 4061 near to its high point and continues south-eastward to the north-western edge of a large conifer plantation, a path continues south-eastward adjacent to the forest boundary gaining the access point to a wide forest break which is relatively near the summit of the hill.

The name of the hill is Mynydd Ton and prior to the survey with the Trimble GeoXH 6000 the height of the hill was listed as 539m at SS 94796 93958 which is beside an ancient cairn.  This height was based on a 1,769.3ft surface height given on the Ordnance Survey Six-Inch map published in 1885.  The 539m height was a relatively new addition to this hill’s listed height as its summit position was originally listed as ground beside its map heighted 535m triangulation pillar situated at SS 94931 94058.

The highest ground at the base of and beside the ancient cairn was surveyed with the Trimble GeoXH 6000 as being 534.2m high.  The processed data gave Estimated Accuracies of 5-15cm: 99.41%, with the Standard Deviation being 0.0m, and the margin of uncertainty given for the height placement of the Trimble was 0.1m.  All of the above signify that the data set was good and accurate to within the parameters of the equipment.

I had previously visited this hill in February 2003 and judged ground approximately one minute away from the trig pillar to be slightly higher than where the trig pillar is situated, and as the flush bracket adjoined to the trig pillar is given a height of 535.335m in the OS Trig Database it means that ground at its base is approximately 535m high.  This figure is dependent upon the accuracy of the flush bracket height which is given as 3rd order.   Therefore the ground at the base of or near to the triangulation pillar is likely to be higher than that beside the ancient cairn; this is dependent upon the accuracy of the flush bracket height and the Trimble survey.

Therefore the position of the relocated summit is at SS 94931 94058 and consists of ground at the base of, or near to the triangulation pillar.  This re-located summit position is at the hill’s originally listed summit and is given a 535m height on current Ordnance Survey maps and it is approximately 175 metres north-eastward from the previously listed summit position.


The full details for the hill are:

Cardinal Hill:  Werfa

Summit Height:  535m

Name:  Mynydd Ton

OS 1:50,000 map:  170

Summit Grid Reference (New Position):  SS 94931 94058 
      
Drop:  92m



The Trimble GeoXH 6000 gathering data beside the ancient cairn on Mynydd Ton, with the relocated position of the summit approximately 175 metres to the north-east and to the right of the forest break in the centre background of this photograph



Myrddyn Phillips and Aled Williams (August 2016)







Mapping Mountains – Summit Relocations – Y Pedwarau



Moel y Ci (SH 590 657)

This is the twenty seventh post under the heading of Summit Relocations, with the survey that resulted in the following details taking place on 14th July 2016 in good, clear and bright conditions.

The twenty seventh major summit relocation initiated from a survey with the Trimble GeoXH 6000 was conducted in the hills of the Glyderau, with the small community of Rhiwlas situated to the hill’s west, and which is positioned between Caernarfon to its west south-west and Bangor to its north.

The hill is listed as a Pedwar (Y Pedwarau [Europeaklist May 2013]), these are the Welsh 400m hills with 30m minimum drop, with its summit position given as SH 593 659 which is the position of the 410m spot height that appears on current Ordnance Survey 1:50,000 maps.  However, the summit area of this hill is given four small uppermost 410m ring contours on Ordnance Survey 1:25,000 maps.  The grid reference for each position was noted and the intention was to survey each in turn to ascertain the high point of the hill, however sometimes contours do not match what appears on the ground and therefore the ground where one ring contour appears was visually judged lower and was not surveyed, whilst another point not given a 410m ring contour on Ordnance Survey maps was judged to warrant a survey.  The results of the four surveys appear below:


1st survey:  409.9m (409.864m, converted to OSGM15) at SH 59083 65767

2nd survey:  409.5m (409.527m, converted to OSGM15) at SH 59086 65786

3rd survey:  409.4m (409.415m, converted to OSGM15) at SH 59104 65898

4th survey:  409.5m (409.486m, converted to OSGM15) at SH 59375 65941

The position of the fourth 410m ring contour that was not surveyed is at SH 59167 65790


Access to the hill is relatively easy as a narrow lane heads eastward from the village of Rhiwlas and meets open access land and continues as a green track which crests the bwlch between Moel y Ci and Parc Drysgol.  A path continues from the top of the green track through the heathery southern slopes of the hill and goes to the summit.

The position of the relocated summit is at SH 59083 65767 and is the top of a flattish rock amongst heather, this position is given a small 410m ring contour on the Ordnance Survey 1:25,000 Explorer map.


The full details for the hill are:

Cardinal Hill:  Glyder Fawr

Summit Height:  409.9m (converted to OSGM15)

Name:  Moel y Ci

OS 1:50,000 map:  114, 115

Summit Grid Reference (New Position):  SH 59083 65767 

Drop:  c 72m


The Trimble GeoXH 6000 gathering data at the summit of Moel y Ci, with the old position of the summit in the background on the left of this photograph




Myrddyn Phillips and Aled Williams (July 2016)





Mapping Mountains – Summit Relocations – 100m Twmpau

This is the twenty sixth post under the heading of Summit Relocations, with the Trimble survey that resulted in this summit relocation being conducted on the 13th May 2016.

The twenty seventh summit relocation initiated from a survey with the Trimble GeoXH 6000 was conducted in the range of hills adjoined to Hafod Ithel, with the hill being situated to the north-east of Aberteifi (Cardigan) and to the west south-west of Aberporth.

The high point of the hill is close to the small community of Felinwynt which only comprises a few houses, and the hill does not possess a name of its own on current Ordnance Survey maps.  As I do not know any local or historical name of merit for the hill it is being listed under the point (Pt. 174m) notation.

Access to the hill is relatively easy as it comprises a large grassy field which has a minor lane running over it in a north to south direction.  However, the high point as surveyed with the Trimble is not on open access land and therefore permission to visit should be sought.

The highest spot height adjoined to this hill on Ordnance Survey maps is 174m and is positioned on the minor lane and adjacent to where a fence heads westward across the field.  A data set was taken with the Trimble from the high point of the road as well as from what was deemed to be the high point of the adjacent field, the results appear below:

High point of road:  173.7m (173.672m)

High point of field:  173.8m (173.788m)

These results are very close in height and there is a possibility that higher ground exists in the field when compared to where the Trimble set-up position was placed.  However, for now this Trimble data is the most accurate that is known for this hill, and although the corner of the field is very close to the high point of the road it is worth itemising this positional change as a summit relocation as many people may just tip their toe on the tarmac instead of visiting the land within the adjacent field.

Therefore, the known higher part of the hill according to this Trimble survey is not on the minor lane as ground in the adjacent westerly field is approximately 0.12m higher.


The full details for the hill are:

Cardinal Hill:  Rhos Ymryson

Summit Height:  173.8m

Name:  Pt. 174m

OS 1:50,000 map:  145

Summit Grid Reference (New Position):  SN 22587 50306 
  
Drop:  c 55m



The Trimble GeoXH 6000 gathering data at the summit of Pt. 174m, with the minor road where the 174m spot height appears on the ground on the other side of the gorse hedgerow in the background of this photograph

For details on the survey that relocated the summit of this hill.

Myrddyn Phillips (May 2016)





Mapping Mountains – Summit Relocations – Yr Uchafion and 500m Twmpau


Bryn Llwyd (SN 835 920)  

This is the twenty fifth post under the heading of Summit Relocations, with the Trimble survey that resulted in this summit relocation being conducted on the 5th and 13th May 2016.

The twenty fifth summit relocation initiated from a survey with the Trimble GeoXH 6000 was conducted in the Pumlumon range of hills on two beautiful sunny days, with the hill situated mid-way between the towns of Machynlleth to its north-west and Llanidloes to its south-east.

The name of the hill where the summit has been re-located to is Bryn Llwyd (SN 835 920) and the name of the hill where the summit has been re-located from is Bryn yr Ŵyn (SN 839 925).  Both hills are connected by a bwlch that is only 9.9m below the height of Bryn yr Ŵyn and 11.4m below the height of Bryn Llwyd.

The summits of both hills possess a small uppermost 500m ring contour on Ordnance Survey maps with no adjoined spot height, with the uppermost ring contour for Bryn Llwyd being the larger.

The critical bwlch for the higher of these hills in positioned to the south-west and to my knowledge their drop has only been surveyed on three occasions, once using a basic levelling survey (BLS) method, and the other two using the much more accurate method of the Trimble.  The results from each survey appear below:


Bryn Llwyd:  summit to critical bwlch, 102.5ft (31.2m) drop (BLS), 30.3m drop (Trimble).

Bryn yr Ŵyn:  summit to connecting bwlch with Bryn Llwyd, 42.5ft (13.0m) drop (BLS), 9.9m drop (Trimble).   


I conducted the basic levelling survey in July 2000 and sent the result to Michael Dewey.  Michael assessed the information and decided to include Bryn yr Ŵyn in his list to The 500-Metre Tops of England and Wales.  The margin of uncertainly associated with the BLS method is within the error tolerance of the result, and ever since I have always wanted to re-visit and survey both hills and produce accurate absolute heights for each.  Their heights as surveyed by the Trimble GeoXH 6000 are:


Bryn Llwyd 501.4m summit at SN 83574 92022 (average of four surveys conducted over two days)

Bryn yr Ŵyn 499.9m summit at SN 83919 92571 (average of five surveys conducted over two days)


Therefore the position of the relocated summit is at SN 83574 92022 and it consists of grass.  The summit area and the hill itself is relatively easy underfoot and consists of moor grass with a path leading from the critical bwlch to the south-west toward the connecting bwlch with Bryn yr Ŵyn.  This re-located summit position is not given a spot height on current Ordnance Survey maps and it is approximately 660 metres south south-westward from the previously listed summit position.


The full details for the hill are:

Cardinal Hill:  Pumlumon

Summit Height:  501.4m

Name:  Bryn Llwyd

OS 1:50,000 map:  135, 136

Summit Grid Reference (New Position):  SN 83574 92022 
  
Drop:  30.3m


The Trimble GeoXH 6000 gathering data at the summit of Bryn Llwyd, with the summit of Bryn yr Ŵyn on the right and in the background of this photograph

For details on the 1st Trimble survey and the 2nd Trimble survey that relocated the summit of this hill.

Myrddyn Phillips and Aled Williams (May 2016)





Mapping Mountains – Summit Relocations – 100m Twmpau


Pentre Clawdd Gorse (SJ 311 442)  

This is the twenty fourth post under the heading of Summit Relocations, with the Trimble survey that resulted in this summit relocation being conducted on the 23rd February 2016.

The twenty fourth summit relocation initiated from a survey with the Trimble GeoXH 6000 was conducted in the eastern part of the Moel y Gamelin range of hills, to the east of the A 483 and north-east of the town of Rhiwabon (Ruabon).

The hill is named Pentre Clawdd Gorse and access to it is relatively easy as its summit is positioned on Wat’s Dyke, this ancient earthwork stretches from the Dee estuary in the north to Shropshire in the south, and public footpaths follow its course over this hill’s broad north – south summit ridge crest.

Pentre Clawdd Gorse is adjoined to the summit of Wynnstay Park which is approximately one kilometre due south from it and has a 141m spot height given it on current Ordnance Survey maps.  The summit of Wynnstay Park was surveyed on the 20th October 2015 resulting in a summit height of 141.2m (converted to OSGM15).  On the same day the bwlch positioned at SJ 307 437 was also surveyed resulting in a bwlch height of 111.7m (converted to OSGM15).  If this was the critical bwlch for Wynnstay Park the hill just failed to make it to P30 Twmpau status with only 29.5m of drop.  However, further map inspection showed that the summit area of Pentre Clawdd Gorse had two small 140m ring contours on it, and if its summit proved to be at least 0.5m higher than the summit of Wynnstay Park the bwlch positioned at SJ 307 437 would be adjoined to Pentre Clawdd Gorse and the hill would be a new P30.

As the summit of Pentre Clawdd Gorse was surveyed as 0.8m higher than Wynnstay Park, and as the latter was listed in the ‘Hills to Survey’ Sub-List that accompanied the original Welsh 100m P30 listings on Geoff Crowder’s v-g.me website, the summit of the qualifying hill has been relocated to that of Pentre Clawdd Gorse.

Therefore the position of the relocated summit is at SJ 31131 44252 and is situated on the highest point of this part of the ancient earthwork known as Wat’s Dyke.  Either side of this earthwork are fields, one given over to grazing and the other which is arable.  This part of Wat’s Dyke has a narrow line of mature trees growing on it which adds perspective and interest to the landscape, although their proximity hampered satellite reception.  This position is not given a spot height on current Ordnance Survey maps and has an uppermost contour ring of 140m, and is approximately 1.4 kilometres northward of the summit of Wynnstay Park.


The full details for the hill are:

Cardinal Hill:  Moel y Gamelin

Summit Height:  142.0m (converted to OSGM15)

Name:  Pentre Clawdd Gorse

OS 1:50,000 map:  117

Summit Grid Reference (New Position):  SJ 31131 44252 
  
Drop:  30.3m


The Trimble GeoXH 6000 gathering data at the summit of Pentre Clawdd Gorse, with the summit of Wynnstay Park on the left and in the background of this photograph

For details on the survey that relocated the summit of this hill please click {here}

Myrddyn Phillips (February 2016)






Mapping Mountains – Summit Relocations – 200m Twmpau



Bwlch Clump (SJ 170 108)  

This is the twenty third post under the heading of Summit Relocations, with the survey that resulted in this summit relocation taking place on the 20th January 2016.

The twenty third summit relocation initiated from a survey with the Trimble GeoXH 6000 was conducted in the eastern part of the Carnedd Wen range of hills, between the small communities of Meifod and Maesmawr.

The hill was originally included in the main 200m P30 list that appeared on Geoff Crowder’s v-g.me website as a single summit under the current 1:25,000 Explorer map height of 262m (SJ 173 109), and listed under the partly invented name of Pen y Bryn Wood (Bryn Wood being the name of the wood to the north-east of the originally listed hill’s summit).  The hill gained a twin summit when the Ordnance Survey enlarged map on the Geograph website included a 262m spot height for the adjacent hill at SJ 170 108, this was named as Bwlch Clump on this map.  Therefore the main purpose of this survey was to ascertain which of the two summits is higher and separate their twin top status.

Access to the hill is easy as there are public footpaths to its west and east, although its summit does not appear on open access ground, therefore permission to visit the high point should be sought.

The names of the two map heighted twin tops are Pt. 262.8 and Bwlch Clump, with the former point (Pt.) notation being used as a name for the hill does not exist on current maps, with the latter name appearing on the Ordnance Survey enlarged Geograph map.

Prior to the survey with the Trimble GeoXH 6000 this hill was listed as a twin top with each 262m map heighted top appearing at SJ 173 109 and SJ 170 108 respectively.


The survey results for this once twin topped P30 are:

Pt . 262.8m

262.8m (converted to OSGM15) summit at SJ 17354 10914

243.5m (converted to OSGM15) bwlch at SJ 17190 10797

19.4m drop



Bwlch Clump

263.9m (converted to OSGM15) summit at SJ 17063 10813

234.9m (converted to OSGM15) bwlch at SJ 17089 10581

29.1m drop


Therefore the survey with the Trimble GeoXH 6000 confirms that Bwlch Clump is 1.1m higher than Pt. 262.8m, and therefore Bwlch Clump is now listed as the prioritised, higher summit.


The full details for the hill are:

Cardinal Hill:  Carnedd Wen

Summit Height:  263.9m (converted to OSGM15)

Name:  Bwlch Clump

OS 1:50,000 map:  125

Summit Grid Reference (confirmed higher summit):  SJ 17063 10813

Drop:  29.1m


The Trimble GeoXH 6000 gathering data at the confirmed higher summit of Bwlch Clump, with the old twin topped summit of Pt. 263m in the background of this photograph

For details on the survey that confirmed the higher of the two map heighted twin tops of this hill please click {here}

Myrddyn Phillips (January 2016)





Mapping Mountains – Summit Relocations – 100m Twmpau


Wynnstay Park (SJ 309 429) 

This is the twenty second post under the heading of Summit Relocations, with the survey  that resulted in the following details taking place on the 20th October 2015.

The twenty second summit relocation initiated from a survey with the Trimble GeoXH 6000 was conducted in the eastern part of the Moel y Gamelin range of hills, on the south-eastern outskirts of Rhiwabon (Ruabon).

The hill was surveyed for Sub category of the 100m Twmpau (thirty welsh metre prominences and upward) list that is adjoined to the original P30 published lists on Geoff Crowder’s v-g.me website.

The hill is situated on the old country estate of the Wynn family; the estate house has now been converted to flats and private houses.  Access to the hill is easy from the north as a paved road leads to its summit.  Parking can either be found adjacent to Broth Lodge at the entrance to the old estate or if wanting a quick visit a car can be driven up the road and parked within 100 metres of the high point of the hill.

The name of the hill is Wynnstay Park and prior to the survey with the Trimble GeoXH 6000 the summit position was listed as SJ 310 430, this is where the 141m spot height appears on the Ordnance Survey map.  However, the high point of this hill is south south-westward from where the spot height appears on the ground.

Therefore the position of the relocated summit is at SJ 30990 42931 and is beside a fence next to the remains of a tree root.  The summit is the top of a field but resembles a grass verge as the continuation of the paved road from the estate entrance to the old estate house is only a few metres from it.  This position is not given a spot height on current Ordnance Survey maps and it is approximately 85 metres south south-westward from the previously listed summit position.
 

The full details for the hill are:

Cardinal Hill:  Moel y Gamelin

Summit Height:  141.2m (converted to OSGM15)

Name:  Wynnstay Park

OS 1:50,000 map:  117

Summit Grid Reference (New Position):  SJ 30990 42931  
 
Drop:  c 14m


The Trimble GeoXH 6000 gathering data at the new summit position of Wynnstay Park, with the old position of the summit beyond the gate in the background of this photograph

For details on the survey that relocated the summit of this hill please click {here}

Myrddyn Phillips (October 2015)





Mapping Mountains – Summit Relocations – 100m Twmpau


The Pimple (SJ 299 472)  

This is the twenty first post under the heading of Summit Relocations, with the survey that resulted in the following details taking place on the 20th October 2015.

The twenty first summit relocation initiated from a survey with the Trimble GeoXH 6000 was conducted in the eastern part of the Bryniau Clwyd range of hills, above the small community of Pentre Bychan which is adjacent to the larger community of Rhosllanerchrugog.

The hill is now listed in the Sub category of the 100m Twmpau (thirty welsh metre prominences and upward) hill list, as prior to the survey with the Trimble GeoXH 6000 it had not been listed in the Sub list adjoined to the original P30 published lists on Geoff Crowder’s v-g.me website.

The hill can be accessed from its west where a public footpath traverses the course of the valley where its bwlch is positioned.  However, permission should be sought for those wishing to visit as the summit is not on open access land.  When I visited I asked permission to do so and was kindly directed to the best ascent route.

The name of the hill is The Pimple; this is a locally known name for the hill and was found when I made enquiries during the survey for its bwlch position.  The hill remains unnamed on current Ordnance Survey maps and its locally known name relates directly to the past industrial heritage of the hill, as its summit is made of mining waste that is now stabilised and grassed over.  The uppermost part of the summit is relatively small in area and squat in shape, and resembles a pimple as it sits upon another elevated part of the hill.

Although prior to the survey with the Trimble GeoXH 6000 the hill was not classified its summit position was indicated to be at SJ 30075 47320, this is where a 154m spot height appears on current Ordnance Survey maps.   This spot height is positioned in a field which when I visited, had been ploughed and probably seeded.  However there is also high ground to the south-west of where the 154m spot height appears on the ground and each respective high point was surveyed, with the following results:


South-western high point (The Pimple):  153.5m (converted to OSGM15) at SJ 29984 47262

North-eastern high point (154m spot height in field):  153.1m (converted to OSGM15) at SJ 30071 47279


Therefore the position of the relocated summit is at SJ 29984 47262 and is the top of a relatively small and squat mound made of old mining spoil that is now stabilised and grassed over.  This position is not given a spot height on current Ordnance Survey maps but the Trimble result gave it as 0.4m higher when compared to the position where the 154m spot height appears on the ground and approximately 115 metres south-westward from it.
 

The full details for the hill are:

Cardinal Hill:  Moel y Gamelin

Summit Height:  153.5m (converted to OSGM15)

Name:  The Pimple

OS 1:50,000 map:  117

Summit Grid Reference (New Position):  SJ 29984 47262  
 
Drop:  25.2m


The Trimble GeoXH 6000 gathering data at the new summit position of The Pimple, with the old position of the summit in the ploughed field in the background of this photograph

For details on the survey that relocated the summit of this hill please click {here}

Myrddyn Phillips (October 2015)





Mapping Mountains – Summit Relocations – Y Pedwarau


Cerrig y Gordref (SH 929 428)

This is the twentieth post under the heading of Summit Relocations, with the survey that resulted in the following details taking place on 2nd October 2015.

The twentieth major summit relocation initiated from a survey with the Trimble GeoXH 6000 was conducted in the hills of the Arennig, in the company of Aled Williams who had suggested the walk.

The name of the hill is Cerrig y Gordref and it is situated to the north of Y Bala and is of an equal distance south south-west of Cerrigydrudion, and is positioned in part of the Arennig hills with it being also associated with its Cardinal Hill, which is Foel Goch.

The hill is listed in the Y Pedwarau (Europeaklist May 2013) as a 400m Sub-Pedwar with 28m of drop, with its summit position given as SH 930 428 which is the position of the 497m spot height that appears on current Ordnance Survey maps.  However, this position is not the high point of this hill as land approximately 100 metres west from where the 497m spot height appears on the ground is higher.  Both positions were surveyed with the westerly position being 3.8m higher according to the Trimble data.

The position of the relocated summit is at SH 92971 42820 and is the top of featureless ground that mainly consists of moor grass, this position is given a spot height of 495m on the Ordnance Survey enlarged map that appears on the Geograph website.


The full details for the hill are:

Cardinal Hill:  Foel Goch

Summit Height:  494.6m (converted to OSGM15)

Name:  Cerrig y Gordref

OS 1:50,000 map:  125

Summit Grid Reference (New Position):  SH 92971 42820
  
Drop:  26.0m


The Trimble GeoXH 6000 gathering data at the new summit position of Cerrig y Gordref, with the old position of the summit to the right of Aled (wearing red) on this photograph

For details on the survey that relocated the summit of this hill please click {here}

Myrddyn Phillips and Aled Williams (October 2015)





Mapping Mountains – Summit Relocations – Y Pedwarau


Banc Bronderwgoed (SN 871 987)  

This is the nineteenth post under the heading of Summit Relocations, with the survey that resulted in the following details taking place on 7th September 2015.

The nineteenth major summit relocation initiated from a survey with the Trimble GeoXH 6000 was conducted in the hills of the Pumlumon range in the company of Aled Williams, who had suggested the walk.
 
The hill is positioned to the south-west of the small communities of Llan and Bont Dolgadfan, and can be easily accessed from a minor road to the north-west of the summit, however the hills of the northern Pumlumon range are highly recommended and it is worthwhile considering an extended walk taking in this hill and other summits.

The name of the hill is Banc Bronderwgoed and until the Trimble survey it was listed as a Pedwar with its summit position given as SN 872 988 which is where the 404m spot height appears on current Ordnance Survey maps.  However, this position is not the high point of the hill as land approximately 80 metres further west was surveyed by the Trimble as being 0.4m higher.

In all three positions on the area of this hill’s summit were surveyed, the results appear below:


1st position:  403.754m (converted to OSGM15) at SN 87250 98813

2nd position:  403.988m (converted to OSGM15) at SN 87205 98770

3rd position:  404.182m (converted to OSGM15) at SN 87154 98796


The first position surveyed with the Trimble equates to the approximate high ground where the 404m spot height appears on current Ordnance Survey maps.

The position of the relocated summit is at SN 87154 98796 and is the top of a grassy knoll which is the first high point when approaching the summit of the hill from the north-west.  This position is not given a spot height on current Ordnance Survey maps.


The full details for the hill are:

Cardinal Hill:  Foel Fadian

Summit Height:  404.2m (converted to OSGM15)

Name:  Banc Bronderwgoed

OS 1:50,000 map:  135, 136

Summit Grid Reference (New Position):  SN 871 987

Drop:  27.7m


The Trimble GeoXH 6000 gathering data at the old summit position of Banc Bronderwgoed, with the new position of the summit on the central grassy ridge on the right of this photo

For details on the survey that relocated the summit of this hill please click {here}

Myrddyn Phillips and Aled Williams (September 2015)





Mapping Mountains – Summit Relocations – 200m Twmpau


Winllan Hill (SJ 217 214)  

This is the eighteenth post under the heading of Summit Relocations, with the survey that resulted in this summit relocation taking place over two days; on 28th / 29th  August 2015.

The eighteenth summit relocation initiated from a survey with the Trimble GeoXH 6000 was conducted in the company of Mark Trengove on the lower easterly hills of Y Berwyn, above the small community of Llansanffraid-ym-Mechain which is situated just north-west of where the Afon Cain flows in to the Afon Efyrnwy (River Vyrnwy).

The hill is listed as a 200m Twmpau (thirty welsh metre prominences and upward) as prior to the survey with the Trimble GeoXH 6000 it was listed with c 48m of drop based on the current Ordnance Survey map height of 216m and an estimated bwlch height of c 168m.

There is good access to the summit of the hill with a number of public footpaths converging on its high point from a variety of directions, with its summit positioned beside a fence and under a large overhanging tree, with the high point only a few metres from where a public footpath crosses the field that it is situated in.

The name of the hill is Winllan Hill and prior to the survey with the Trimble GeoXH 6000 the position of the summit was listed as that of its 216m spot height which is situated at SJ 21686 21409.  This spot height is positioned on a slight rise which resembles part of an ancient earthen embankment associated with an old hill fort, and although there is evidence of these existing on neighbouring hills there is no evidence on current maps that one existed on Winllan Hill.

The position of the relocated summit is at SJ 21709 21460 and is the top of a field with the highpoint situated under a large overhanging tree beside a fence that runs in an east – west direction over the summit.  This position is not given a spot height on current Ordnance Survey maps but the Trimble result gave it as 4.3m higher when compared to the position where the 216m spot height appears on current Ordnance Survey maps and approximately 50 metres northward from it.
 

The full details for the hill are:

Cardinal Hill:  Rhialgwm

Summit Height:  220.3m (converted to OSGM15)

Name:  Winllan Hill

OS 1:50,000 map:  126

Summit Grid Reference (New Position):  SJ 21709 21460 
 
Drop:  c 52m


The Trimble GeoXH 6000 gathering data at the new summit position of Winllan Hill, with Mark (wearing blue top) standing on the old position of the summit in the left background of this photograph

For details on the survey that relocated the summit of this hill please click {here}

Myrddyn Phillips (August 2015)





Mapping Mountains – Summit Relocations – Y Pedwarau and 300m Twmpau


Cefn Bach (SO 002 372)  


Please note; since this Summit Relocation was announced the two Cefn Bach hills have been analysed with LIDAR data resulting in the southerly hill being confirmed as the higher, this makes most of the detail given below as redundant, however it is being kept as an historical record. 


This is the seventeenth post under the heading of Summit Relocations, with the survey that resulted in this summit relocation taking place on 18th August 2015.

The seventeenth major summit relocation initiated from a survey with the Trimble GeoXH 6000 was conducted in the southern hills of Mynydd Epynt on a fine and bright day during a circuit of three hills.

The name of the hill is Cefn Bach and it is listed as a 390m Sub-Pedwar and as a 300m Tumpau.  The hill has twin map heighted 391m summits which are orientated north to south of one another.  It is the southerly summit at SO 002 372 that is currently listed as the 390m Sub-Pedwar with 55m of drop, whilst the northerly summit at SO 003 387 is currently listed as the 390m Double Sub-Pedwar with c 22m of drop.  These details are also applicable to the 300m Twmpau list with these summits listed as a Twmpau and Sub-Twmpau respectively.

The summits can be easily visited from a narrow lane to their south where one car can just be squeezed onto the grass verge.  This ascent requires a there and back walk, alternatively a similar there and back walk can be taken from a lane to the north-west of the northerly summit.

Unfortunately there was only sufficient time to survey the southerly of these two summits.  The results and other map details and their clarification in regard to classification appear below.  These are detailed from north to south:


Cefn Bach:  391m map spot height at SO 003 387, new position for the 390m Sub-Pedwar and 300m Twmpau.  This gives a drop value of 56m.

Pt. 389.4m, Cefn Bach:  c 369m bwlch at SO 000 383.

Pt. 389.4m, Cefn Bach:  389.4m (converted to OSGM15) summit at SO 00293 37291, new position for the Double Sub-Pedwar and 300m Sub-Twmpau.  This gives a drop value of c 20m.  

Cefn Bach:  334.9m bwlch at SO 00287 36949.


This means that the hill classification is swapped between these two summits.  Therefore the position of the relocated summit for the 390m Sub-Pedwar and 300m Twmpau is at SO 003 387, and the position of the relocated summit for the 390m Double Sub-Pedwar and 300m Sub-Twmpau is at SO 00293 37291.


The full details for the 390m Sub-Pedwar and 300m Twmpau are:

Cardinal Hill:  Clepyn Melyn

Summit Height:  391m

Name:  Cefn Bach

OS 1:50,000 map:  160

Summit Grid Reference (New Position):  SO 003 387
  
Drop:  56m



The full details for the 300m Sub-Twmpau are:

Cardinal Hill:  Clepyn Melyn

Summit Height:  389.4m (converted to OSGM15)

Name:  Pt. 389m, Cefn Bach

OS 1:50,000 map:  160

Summit Grid Reference (New Position):  SO 00293 37291 
 
Drop:  c 20m


The Trimble GeoXH 6000 gathering data at the new summit position of Pt. 389m, Cefn Bach which was the 390m Double Sub-Pedwar and is the 300m Sub-Twmpau, with the new position for the summit of the 390m Sub-Pedwar and 300m Twmpau in the centre background of this photograph

For details on the survey that relocated the summit of this hill please click {here}

Myrddyn Phillips and Aled Williams (August 2015)





Mapping Mountains – Summit Relocations – Y Pedwarau


Bryn Serth (SO 147 109)  

This is the sixteenth post under the heading of Summit Relocations, with the survey that resulted in this summit relocation taking place on 12th August 2015.

The sixteenth major summit relocation initiated from a survey with the Trimble GeoXH 6000 was conducted in the hills of the Cymoedd in south Wales, during a walk in the company of Mark Trengove on a bright and cheerful day.

The hill is situated on the northern outskirts of Tredegar at the head of the Cwm Sirhywi (Sirhowey Valley) and it can be easily accessed from a car park beside the busy A4047 which is positioned at its south-eastern base.  This car park also gives access to the Aneurin Bevan Memorial Stones; these consist of four monoliths and are set against the landscape of Ebbw Vale, Tredegar and Rhymney which form the constituencies which Aneurin Bevan represented during his years in Westminster.

The name of the hill is Bryn Serth and until the Trimble survey it was listed as a Pedwar with its summit position given as SO 147 108 which is the centralised position of its uppermost 410m ring contour that appears on current Ordnance Survey maps.  However, this position is not the high point of the hill as land approximately 100 metres further north was surveyed by the Trimble as being 2.0m higher.

The position of the relocated summit is at SO 14794 10908 and is the top of featureless ground that mainly consists of long grass, this position is not given a spot height on current Ordnance Survey maps but the Trimble result gave it as 2.0m higher when compared to the land where the uppermost ring contour appears on the ground.


The full details for the hill are:

Cardinal Hill:  Cefn Manmoel

Summit Height:  403.9m (converted to OSGM15)

Name:  Bryn Serth

OS 1:50,000 map:  161

Summit Grid Reference (New Position):  SO 14794 10908

Drop:  25.4m


The Trimble GeoXH 6000 gathering data at the new summit position of Bryn Serth, with the old position of the summit in the background of this photograph

For details on the survey that relocated the summit of this hill please click {here}

Myrddyn Phillips and Aled Williams (August 2015)





Mapping Mountains – Summit Relocations – 100m Twmpau


Cae Boncyn (SJ 238 193) 

This is the fifteenth post under the heading of Summit Relocations, with the survey that resulted in this summit relocation taking place on 8th August 2015.

The fifteenth summit relocation initiated from a survey with the Trimble GeoXH 6000 was conducted in the lower hills of the Carnedd Wen range, centred between the small towns of Llansanffraid-ym-Mechain to the hill’s north-west, Llanymynech to the hill’s north-east and Four Crosses to the hill’s south-east.  All three communities are situated beside or close to the Afon Efyrnwy (River Vyrnwy).

The hill was surveyed in the company of Alex Cameron during a multi hill bagging day in lovely sunshine as we visited nine P30 Twmpau hills with seven of them being Trimbled.

The hill is listed as a 100m Twmpau (thirty welsh metre prominences and upward) and is unnamed on current Ordnance Survey maps, having been listed as Bryn y Gelli in the original P30 lists that appeared on Geoff Crowder’s v-g.me website.  This was an invented name partly taken from the farm which is situated just to the south-west of the summit.  However, when we visited the hill we asked Mel Jones at Gelli Farm for permission to do so and also made enquiries concerning the name of the hill, Mel produced a field map of Gelli Farm with the field where the summit of the hill is situated named as Cae Boncyn, unsurprisingly this is also the name that Mel gave us for the highest field.

Prior to the survey with the Trimble GeoXH 6000 the position of the summit was listed as that of its 142m spot height which is situated at SJ 23882 19312.  This spot height is positioned in an adjacent field to where the highest part of the hill is situated, the distance between these two positions is not great but a relocation of a summit to a different field is important and therefore this information warrants a post under the heading of Summit Relocations.

The position of the relocated summit is at SJ 23849 19306 and is the top of a small hillock, hence the Boncyn part of its name, this is not given a spot height on current Ordnance Survey maps but the Trimble result gave it as being the same height as its current 142m spot height and approximately 30-40 metres westward from its position on Ordnance Survey maps.


The full details for the hill are:

Cardinal Hill:  Carnedd Wen

Summit Height:  142.1m (converted to OSGM15)

Name:  Cae Boncyn

OS 1:50,000 map:  126

Summit Grid Reference (New Position):  SJ 23849 19306
  
Drop:  44m


The Trimble GeoXH 6000 gathering data at the new summit position of Cae Boncyn, with the old position of the summit in the adjacent field beyond the wooden fence in the background of this photo

For details on the survey that relocated the summit of this hill please click {here}

Myrddyn Phillips (August 2015)






Mapping Mountains – Summit Relocations – 100m Twmpau


Gravel Pit Field (SJ 225 167)

This is the fourteenth post under the heading of Summit Relocations, with the survey that resulted in this summit relocation taking place on 8th August 2015.

The fourteenth summit relocation initiated from a survey with the Trimble GeoXH 6000 was conducted in the lower hills of the Carnedd Wen range, between the small communities of Deuddwr and Collfryn, these are situated between the A495 to the west and the A483 to the east.

The hill was surveyed in the company of Alex Cameron during a multi hill bagging day when the sun beat down and we visited nine P30 Twmpau hills with seven of them being Trimbled.

The hill is listed as a 100m Twmpau (thirty welsh metre prominences and upward) and is unnamed on current Ordnance Survey maps, having been listed as The Mount in the original P30 lists that appeared on Geoff Crowder’s v-g.me website, this was a name taken from the farm which is situated southward of this hill’s summit.  The listed name for this hill is now Gravel Pit Field, which is a name derived from the Tithe map.

Prior to the survey with the Trimble GeoXH 6000 the position of the summit was listed as that of its triangulation pillar which is submerged in a hedge beside a narrow country lane.  This trig pillar has a 153.951m flush bracket adjoined to it and is given the rounded up height of 154m on current Ordnance Survey maps, with its flush bracket given the position of SJ 22556 16673 in the OS Trig Database.  However, higher ground exists on the opposite side of the lane in a field.

The position of the relocated summit is at SJ 22598 16703 and is the top of featureless ground a few metres from a hedge in a field, this is not given a spot height on current Ordnance Survey maps but the Trimble result gave it as 0.99m higher than the flush bracket on the triangulation pillar and approximately 50 metres north-eastward from where it stands in a hedge.


The full details for the hill are:

Cardinal Hill:  Carnedd Wen

Summit Height:  154.9m (converted to OSGM15)

Name:  Gravel Pit Field

OS 1:50,000 map:  126

Summit Grid Reference (New Position):  SJ 22598 16703 
 
Drop:  c 47m


The Trimble GeoXH 6000 gathering data at the new summit position of Gravel Pit Field), with the old position of the summit opposite the gate in the centre right of this photograph

For details on the survey that relocated the summit of this hill please click {here}

Myrddyn Phillips (August 2015)






Mapping Mountains – Summit Relocations – The Fours


The Wrekin (SJ 628 081)  

This is the thirteenth post under the heading of Summit Relocations, with the survey that resulted in the following details taking place on 3rd August 2015.

The thirteenth major summit relocation initiated from a survey with the Trimble GeoXH 6000 was conducted in the Shropshire hills to the south-west of Wellington which forms a part of Telford, and was conducted during a walk in the company of Charlie Leventon.

The name of the hill is The Wrekin and it is one of the most popular of the Shropshire hills with many thousands of visitors each year ascending its well-maintained north-easterly path.  However, the great majority of these people only visit the triangulation pillar which stands near to a panoramic viewfinder.  The trig pillar is given the height of 407m on current Ordnance Survey maps and its flush bracket given the height of 407.106m in the OS Trig Database.  But the hill also has a northerly summit which is of similar height to the ground beside the trig pillar; this was commented on by Charlie in a Summitsup post on his blog dated 16th October 2014.

The hill is listed in The Fours with its summit position given as SJ 628 080 which is the position of the 407m trig point on current Ordnance Survey maps.  The northerly summit and the highest ground beside the trig pillar were surveyed with the Trimble GeoXH 6000 and the results appear below:

Northerly summit:  406.9m (406.883m to three decimal places and converted to OSGM15) at SJ 62832 08197.

Ground beside trig:  406.7m (406.746m to three decimal places and converted to OSGM15) at SJ 62807 08094

The position of the relocated summit is at SJ 62832 08197 and is the top of featureless ground that mainly consists of earth with grass beside it, this position is not given a spot height on current Ordnance Survey maps but the Trimble result gave it as 0.14m higher when compared to the high point beside the triangulation pillar.


The full details for the hill are:

Cardinal Hill:  The Wrekin

Summit Height:  406.9m (converted to OSGM15)

Name:  The Wrekin

OS 1:50,000 map:  127

Summit Grid Reference (New Position):  SJ 62832 08197 
 
Drop:  310m


The Trimble GeoXH 6000 gathering data at the new summit position of The Wrekin, with the old position of the summit beside the triangulation pillar in the background of this photo

For details on the survey that relocated the summit of this hill please click {here}

Myrddyn Phillips and Aled Williams (August 2015)






Mapping Mountains – Summit Relocations – Y Pedwarau


Little Hill (SO 171 537)

This is the twelfth post under the heading of Summit Relocations, with the survey that resulted in the following details taking place on 9th July 2015.

The twelfth major summit relocation initiated from a survey with the Trimble GeoXH 6000 was conducted in the hills of Fforest Glud, during a walk in the company of Nicola Morris who spent much of the time operating the Trimble and lazing in the sunshine.

The hill is situated to the east of the small community of Hundred House and to the west south-west of Gladestry in the heartland of the beautiful and quiet hills of Radnorshire.

The hill is listed as a Pedwar with its summit position given as SO 172 537 which is the position of the 469m spot height that appears on current Ordnance Survey maps.  However, this hill has another high point which is approximately 100 metres west from where the 469m spot height appears on the ground.  Both positions were surveyed with the westerly position being 0.2m higher according to the Trimble data.

The position of the relocated summit is at SO 17175 53749 and is the top of featureless ground that mainly consists of bilberry, this position is not given a spot height on current Ordnance Survey maps but the Trimble result gave it as 0.2m higher when compared to the high point of its adjacent featureless top.


The full details for the hill are:

Cardinal Hill:  Gwaun Ceste

Summit Height:  469.2m (converted to OSGM15)

Name:  Little Hill

OS 1:50,000 map:  148

Summit Grid Reference (New Position):  SO 17175 53749
  
Drop:  46.4m


The Trimble GeoXH 6000 gathering data at the new summit position of Little Hill, with the old position of the summit just on the left of centre in the background of this photo

For details on the survey that relocated the summit of this hill please click {here}

Myrddyn Phillips and Aled Williams (July 2015)






Mapping Mountains – Summit Relocations – Y Pedwarau


Pt. 483.6m (SH 735 428)

This is the eleventh post under the heading of Summit Relocations, and this heading is now up-to-date, therefore future posts will appear shortly after the respective summit relocation has been determined.

The eleventh major summit relocation announced on the Mapping Mountains blog was initiated from a visual inspection conducted by Aled Williams on 4th July 2015 in the hills between the Moelwynion and the Migneint, and later confirmed by a survey with the Trimble GeoXH 6000 on the 14th March 2016.

The hill is listed as a Pedwar with its summit position given as SH 735 429, this grid reference is the position of the 486m spot height that appears on the Harvey 1:40,000 British Mountain Map.

The summit area of this hill has four small 480m contour rings on it on the current Ordnance Survey 1:25,000 map.  None of these contour rings has a spot height given to them on Ordnance Survey maps with the one positioned furthest north also being the largest, the position of this contour ring is where the 486m spot height appears on Harvey Maps.

The ten figure grid reference position determined by the Trimble for the four 480m contour rings that appear on the current Ordnance Survey 1:25,000 map and their respective heights are:

Contour 1:  SH 73542 42903    482.686m (converted to OSGM15)

Contour 2:  SH 73563 42818    482.965m (converted to OSGM15)

Contour 3:  SH 73541 42812    483.574m (converted to OSGM15)

Contour 4:  SH 73475 42798    480.924m (converted to OSGM15)

Contour 1 is the largest and is where the 486m Harvey Maps spot height appears, Contour 4 is the smallest and Contours 2 and 3 are placed near to one another.  It is Contour 3 at SH 73537 42813 that is noticeably higher from every position, and this was confirmed with the Trimble survey.

The hill is unnamed on current Ordnance Survey maps and we have therefore adopted the point (Pt.) notation for it.  Since publication of the 1st edition of Y Pedwarau by Europeaklist our place-name research has continued and Aled has confirmed this hill’s name from a local source, this name will be used in future publications of Y Pedwarau.



The full details for the hill are:

Cardinal Hill:  Graig Goch

Summit Height:  483.6m (converted to OSGM15)

Name:  Pt. 483.6m

OS 1:50,000 map:  124

Summit Grid Reference (New Position):  SH 73541 42812
  
Drop:  34.4m


The new summit position of Pt. 483.6m is highlighted in yellow, with the old position of the summit highlighted in red on this photo.  Photo: Aled Williams

Aled Williams and Myrddyn Phillips (July 2015 and March 2016)






Mapping Mountains – Summit Relocations – Y Pedwarau


Pt. 417.6m (SJ 214 396)

This is the tenth post under the heading of Summit Relocations, with the following details being retrospective as the Trimble survey that resulted in this summit relocation was conducted on 26th June 2015.

The tenth major summit relocation initiated from a survey with the Trimble GeoXH 6000 was conducted in the north-eastern Berwyn during an evening walk in the company of Mark Trengove.

The hill is situated to the south of Llangollen and for those wishing an easy visit it can be quickly accessed from its south where a minor road follows the west – east direction of the ridge that the summit of the hill is situated on.

The hill is listed as a Pedwar with its summit position given as SJ 217 396 which is the approximate position of the 416m spot height that appears on the Ordnance Survey 1:50,000 map.  However, during our visit we visually determined that a point approximately 200 metres to the east of where the 416m spot height appears on the ground was in fact higher.

The hill is unnamed on current Ordnance Survey maps and we have therefore adopted the point (Pt.) notation for it.  Since publication of the 1st edition of Y Pedwarau by Europeaklist our continuing place-name research has found a name for this hill that appeared on an old map, this name will be used in the 2nd edition of Y Pedwarau when published by Europeaklist.

The high point surveyed with the Trimble GeoXH 6000 has no spot height on any map but this position was found to be 1.6m higher that the 416m spot height previously mentioned.


The full details for the hill are:

Cardinal Hill:  Craig Berwyn

Summit Height:  417.6m (c0nverted to OSGM15)

Name:  Pt. 417.6m

OS 1:50,000 map:  126

Summit Grid Reference (New Position):  SJ 21464 39666 
 
Drop:  31.9m


The Trimble GeoXH 6000 gathering data at the new summit position of Pt. 417.6, with the old position of the summit behind the tree on the left of the photo

For details on the survey that relocated the summit of this hill please click {here}

Myrddyn Phillips and Aled Williams (June 2015)






Mapping Mountains – Summit Relocations – Y Pedwarau


Llethr Melyn (SN 959 579)

This is the ninth post under the heading of Summit Relocations, with the following details being retrospective as the Trimble survey that resulted in this summit relocation was conducted on 23th May 2015.

The ninth major summit relocation initiated from a survey with the Trimble GeoXH 6000 was conducted in the eastern Elenydd on a fine day during a circuit of seven hills.

The hill is listed as a Pedwar and is situated to the north north-west of the small community of Llanafan-fawr.

The name of the hill is Llethr Melyn, the summit area of this hill has three separate ring contours that have a 433m spot height on current Ordnance Survey maps, with a fourth point to the south that has a 430m triangulation pillar on it.

The position of each of these 433m spot heights was surveyed, as was the highest ground beside the trig pillar as well as a fifth point that visually looked as high as any other.

The resulting survey results are:

Summit 1:  430.9m (converted to OSGM15) at SN 96347 57664

Summit 2:  432.4m (converted to OSGM15) at SN 95948 57974

Summit 3:  433.0m (converted to OSGM15) at SN 95967 57997

Summit 4:  432.6m (converted to OSGM15) at SN 96031 58035

Summit 5:  431.5m (converted to OSGM15) at SN 96301 58100

Summit 1 is where the 43om trig pillar is situated and Summits 2, 4 and 5 are where the three 433m spot heights appear on the ground.  However, the highest point surveyed with the Trimble was Summit 3 which has no spot height adjoined to it on current Ordnance Survey maps.

The summit that was prioritised in the listing of the Y Pedwarau was at SN 960 580 with the other two summits of equal map height being mentioned in the Notes section that accompanied the Europeaklist publication.

The position of the relocated summit is at SN 95967 57997 and is the top of a small outcrop of rock, this is not given a spot height on current Ordnance Survey maps but the Trimble result gave it as 0.4m higher when compared to the next highest point surveyed.


The full details for the hill are:

Cardinal Hill:  Gorllwyn

Summit Height:  433.0m (converted to OSGM15)

Name:  Llethr Melyn

OS 1:50,000 map:  147

Summit Grid Reference (New Position):  SN 95967 57997 
 
Drop:  38.7m


The Trimble GeoXH 6000 gathering data at the new summit position of Llethr Melyn, with the old position of the prioritised summit in the background of the photo

For details on the survey that relocated the summit of this hill please click {here}

Myrddyn Phillips and Aled Willams (May 2015)






Mapping Mountains – Summit Relocations – Y Pedwarau


Lan Fawr (SN 939 578) 

This is the eighth post under the heading of Summit Relocations, and the following details are retrospective as the Trimble survey that resulted in this summit relocation was conducted on 21st May 2015.

The eighth major summit relocation initiated from a survey with the Trimble GeoXH 6000 was conducted in the wilds of the Elenydd on a fine and bright day during a circuit of five hills.

The hill is listed as a 400m Sub-Pedwar and is situated between Pontnewydd-ar-Wy (Newbridge-on-Wye) to its east and Beulah to its south.

The name of the hill is Lan Fawr, its summit position used to be listed as SN 940 577 as this is where the 461m spot height appears on its summit area on current Ordnance Survey maps, this point is situated on moorland that is prone to be water logged.

The position of the relocated summit is at SN 93963 57819 and is the top of a large erratic boulder, this is not given a spot height on current Ordnance Survey maps but the Trimble result gave it as 0.25m higher when compared to the high point of its adjacent moorland top.


The full details for the hill are:

Cardinal Hill:  Gorllwyn

Summit Height:  460.8m (converted to OSGM15)

Name:  Lan Fawr

OS 1:50,000 map:  147

Summit Grid Reference (New Position):  SN 93963 57819
  
Drop:  22.0m


The Trimble GeoXH 6000 gathering data at the new summit position of Lan Fawr, with the old position of the summit in the background of the photo

For details on the survey that relocated the summit of this hill please click {here}

Myrddyn Phillips and Aled Williams (May 2015)






Mapping Mountains – Summit Relocations – Y Pedwarau


Pt. 430.7m (SO 089 525)

This is the seventh post under the heading of Summit Relocations, and the following details are retrospective as the Trimble survey that resulted in this summit relocation was conducted on 25th April 2015.

The seventh major summit relocation initiated from a survey with the Trimble GeoXH 6000 was conducted in the hills to the south-west of Hundred House, which is a small community to the north-east of Llanfair-ym-Muallt (Builth Wells) in the heartland of Mid-Wales.

This hill formed part of a circuit around Aberedw Hill (SO 084 507) in the company of Mark Trengove and Aled Williams who were visiting hills whilst I scampered ahead to survey them.  The culmination of the walk was on the summit of Aberedw Hill where we met Carole Engel, Anton Ciritis, Alex Cameron and Alan Greenwood to celebrate Carole’s completion of the Pedwarau – The 400m Hills of Wales.

The hill is listed as a Pedwar and remains unnamed on current Ordnance Survey maps and we have therefore adopted the point (Pt.) notation for it.  The summit area of the hill has three small 430m ring contours on it, with the furthest easterly one being given a spot height of 432m on current Ordnance Survey maps, and this is where the summit of the hill used to be listed.

The position of each of these contour rings was surveyed with the Trimble resulting in:

Summit 1:  429.8m (converted to OSGM15) at SO 09189 52379

Summit 2:  430.7m (converted to OSGM15) at SO 08911 52554

Summit 3:  428.9m (converted to OSGM15) at SO 08099 52175

Summit 1 is where the 432m spot height appears on current Ordnance Survey maps, but its adjacent summit (Summit 2) was surveyed by the Trimble as being 0.8m higher

The new summit position for this hill is approximately 320 metres north-westward from where the 432m spot height appears on the ground.


The full details for the hill are:

Cardinal Hill:  Great Rhos

Summit Height:  430.7m (converted to OSGM15)

Name:  Pt. 430.7m

OS 1:50,000 map:  147

Summit Grid Reference (New Position):  SO 08911 52554 
 
Drop:  30.1m


The Trimble GeoXH 6000 gathering data at the new summit of Pt. 430.7m, with the old position of the summit in centre background of the photo

For details on the survey that relocated the summit of this hill please click {here}

Myrddyn Phillips and Aled Williams (April 2015)






Mapping Mountains – Summit Relocations – Tumps


Caus Castle (SJ 337 077)

This is the sixth post under the heading of Summit Relocations, but it is the first post under this heading that affects a hill list where I have not had direct input into its compilation, but I’ve sneaked its details in anyway.  These details are retrospective as the Trimble survey that resulted in this prospective summit relocation was conducted on 21st April 2015.

The survey with the Trimble GeoXH 6000 that resulted in this prospective summit relocation was conducted in the hills of Shropshire on a bright and warm day in late April in the company of Charlie Leventon.

The hill appears in the P30 listing of Tumps which was duplicated / collated / compiled by Mark Jackson, and is situated to the south-west of the small village of Westbury which is close to the English – Welsh border in the heartland of beautiful Shropshire which really should be annexed for Wales.

The name of the hill is Caus Castle, its summit height and position is currently listed as 223m and SJ 33700 07800 respectively, this position when on the ground is on a slight rise but ground to its south-west is significantly higher.

The prospective new summit positon for this hill is at the top of an old motte which rises impressively from its wooded surroundings, and is approximately 80 metres south-westward from where the slight rise that constitutes the position of the 223m Ordnance Survey spot height is positioned on the ground.


The full details for the hill are:

Cardinal Hill:  Corndon

Summit Height:  233.6m (converted to OSGM15)

Name:  Caus Castle

OS 1:50,000 map:  126

Summit Grid Reference (New Position):  SJ 33713 07792 
 
Drop:  53.2m


The Trimble GeoXH 6000 gathering data at the prospective new summit position of Caus Castle, the position where the 223m spot height appears on current Ordnance Survey maps is out of sight behind and below the Trimble

For details on the survey that produced the prospective summit relocation of this hill please click {here}

Myrddyn Phillips (April 2015)






Mapping Mountains – Summit Relocations – Y Pedwarau


Mynydd Poeth (SH 953 513)

This is the fifth post under the heading of Summit Relocations, with the following details being retrospective as the Trimble survey that resulted in this summit relocation was conducted on 24th December 2014.

The fifth summit relocation initiated from a survey with the Trimble GeoXH 6000 was conducted in the hills of Mynydd Hiraethog.  The name of the hill is Mynydd Poeth and it is situated midway between the small town of Cerrigydrudion to its south and the Alwen Reservoir to its north, the hill was surveyed in the company of Mark Trengove on Christmas Eve before Santa brought the pressies.

The hill used to be listed as a Sub-Pedwar and was reclassified to a Pedwar from the same survey that also initiated its summit relocation.  When Mynydd Poeth was listed as a Sub-Pedwar its summit position was given to where the 417m spot height appears on current Ordnance Survey maps, this position on the ground is at SH 95403 51068 and is southward from where the actual summit of this hill is situated.

Its new summit is positioned approximately 230 metres northward from where the 417m spot height appears on current Ordnance Survey maps.  This new position has no summit spot height on any map.


The full details for the hill are:

Cardinal Hill:  Mwdwl Eithin

Summit Height:  419.3m (converted to OSGM15)

Name:  Mynydd Poeth

OS 1:50,000 map:  116

Summit Grid Reference (New Position):  SH 95375 51301 
 
Drop:  31.7m


The Trimble GeoXH 6000 gathering data at the new summit position of Mynydd Poeth, with the old position of the summit just beyond the far right of this photo

For details on the survey that relocated the summit of this hill please click {here}

Myrddyn Phillips and Aled Williams (December 2014)







Mapping Mountains – Summit Relocations – 200m Twmpau


Pen y Berth (SJ 081 127)  

This is the fourth post under the heading of Summit Relocations, with the following details being retrospective as the Trimble survey that resulted in this summit relocation was conducted on 19th October 2014.

The fourth summit relocation initiated from a survey with the Trimble GeoXH 6000 was conducted in the hills just to the east of the small community of Dolanog, with the hill positioned above the B4382 to the south and the Afon Efyrnwy to the north.

The hill was surveyed in the company of Mark Trengove on a day when the westerly showers were being pushed east; thankfully all missed us as we visited two hills over two separate walks.

The hill is listed as a 200m Twmpau (thirty welsh metre prominences and upward) and is named Pen y Berth, its prioritised summit position was listed at SJ 080 127 as this is where its 282m summit spot height appears on the current Ordnance Survey enlarged map on the Geograph website.  This hill also has a twin top on this map with its complimentary 282m top positioned at SJ 083 127.

The position of the spot height at SJ 080 127 is immersed in a conifer plantation, whilst the position of the spot height at SJ 083 127 is on open ground with small deciduous trees growing near to it.  The latter positon was surveyed with the Trimble as was a position on the periphery of the conifer plantation that was visually higher than the remaining ground.

The result of each survey was:

282m spot height at SJ 083 127 came to 283.7m (converted to OSGM15) at SJ 08322 12748

new summit position came to 287.5m (converted to OSGM15) at SJ 08126 12730

282m spot height at SJ 080 127 was not surveyed with the Trimble as it was deemed lower compared to the new summit position

The position of the relocated summit is at SJ 08126 12730 and is the top of featureless ground under Larch trees, this is not given a spot height on current Ordnance Survey maps but the Trimble result gave it as 5.5m higher and approximately 80 metres eastward from where the westerly of the two 282m spot heights is positioned on the ground.


The full details for the hill are:

Cardinal Hill:  Carreg y Big

Summit Height:  287.5m (converted to OSGM15)

Name:  Pen y Berth

OS 1:50,000 map:  125

Summit Grid Reference (New Position):  SJ 08126 12730
  
Drop:  134.2m


The Trimble GeoXH 6000 set up at the new summit position of Pen y Berth, with the old position of the prioritised summit approximately 80 metres behind the Trimble and further into the conifer plantation

For details on the survey that relocated the summit of this hill please click {here}

Myrddyn Phillips (October 2014)






Mapping Mountains – Summit Relocations – Y Pedwarau


Moel Eglwys (SH 905 479)  

This is the third post under the heading of Summit Relocations, with the following details being retrospective as the Trimble survey that resulted in this summit relocation was conducted on 27th September 2014.

The third summit relocation initiated from a survey with the Trimble GeoXH 6000 was conducted in the hills to the west of the small town of Cerrigydrudion which is situated just to the north-east of the A5.  This was one of five hills visited with Aled Williams during a day when we did three separate walks.

The hill is listed as a Pedwar and is named Moel Eglwys, its summit position was listed at SH 905 478 as this is where its 448m summit spot height appears on current Ordnance Survey maps.  This position was surveyed using the Trimble, as was another position to its north.

The position of the relocated summit is at SH 90580 47962 and is the top of featureless ground, this is not given a spot height on current Ordnance Survey maps but the Trimble result gave it as 0.15m higher and approximately 65 metres northward from where the 448m spot height is positioned on the ground.


The full details for the hill are:

Cardinal Hill:  Arennig Fach

Summit Height:  447.6m (converted to OSGM15)

Name:  Moel Eglwys

OS 1:50,000 map:  116

Summit Grid Reference (New Position):  SH 90580 47962 
 
Drop:  c 36m


The Trimble GeoXH 6000 set-up position at the new summit position of Moel Eglwys, with the old position for the summit in the background just beyond the cairn and fence

For details on the survey that relocated the summit of this hill please click {here}

Myrddyn Phillips and Aled Williams (September 2014)






Mapping Mountains – Summit Relocations – Y Pedwarau

This is the second post under the heading of Summit Relocations, with the following details being retrospective as the Trimble survey that resulted in this summit relocation was conducted on 21st September 2014.

The second summit relocation initiated from a survey with the Trimble GeoXH 6000 was conducted in the hills of the Rhinogydd, with the hill situated between Abermaw (Barmouth) to the south-west, Dolgellau to the south-east, Harlech to the west and Trawsfynydd to the north-east.  The hill formed part of an excellent day’s walk in the company of Mark Trengove and Dave Middleton.

The hill remains unnamed on current Ordnance Survey maps and we have therefore adopted the point (Pt.) notation for it.  The hill used to be listed as a Sub-Pedwar and was reclassified to a Pedwar from the same survey that also initiated its summit relocation.

The hill is listed as Pt. 499m, when listed as a Sub-Pedwar its summit position was given to where the 499m spot height appears on current Ordnance Survey maps, this position on the ground is at SH 66549 31044 and is the highest part of the rock perched at the top of a small cliff. 

The position of the relocated summit is at SH 66565 31003 and is the top of a large erratic boulder, this is not given a spot height on current Ordnance Survey maps but the Trimble result gave it as 0.6m higher than where the spot height appears on the ground.


The full details for the hill are:

Cardinal Hill:  Y Llethr

Summit Height:  499.5m

Name:  Pt. 499m

OS 1:50,000 map:  124

Summit Grid Reference (New Position):  SH 66565 31003
  
Drop:  30.3m


The Trimble GeoXH 6000 gathering data at the new summit position of Pt. 499m, with the old position of the summit on the left and just above the centre of the photo

For details on the survey that relocated the summit of this hill please click {here}

Myrddyn Phillips and Aled Williams (September 2014)





Mapping Mountains – Summit Relocations – 30m-99m Twmpau


Graig Wen (SH 397 947) 

This is the first post under the heading of Summit Relocations, with the survey that resulted in the following details taking place on the 7th September 2014.

The first major summit relocation initiated from a survey with the Trimble GeoXH 6000 was conducted in the north of Ynys Môn on a fine and bright day on a grouping of three excellent hills in the company of Alex Cameron.

The hill is listed in the 30m-99m height band of Twmpau (thirty welsh metre prominences and upward) hills and is situated north-eastward of the small town of Cemaes, the nearest major road to the hill is the A 5025 which is 1km directly south of its summit.

The name of the hill is Graig Wen, its summit position used to be listed beside its trig pillar on a small rock outcrop at SH 398 947 that is within a small continuous 90m ring contour on current Ordnance Survey maps.

Its new summit is positioned approximately 80 metres westward from its trig pillar and is the top of a large boulder which is prominent when approaching the hill from the west.  This position has no uppermost 90m ring contour given it on current Ordnance Survey maps.


The full details for the hill are:

Cardinal Hill:  Mynydd Twr

Summit Height:  91.3m (converted to OSGM15)

Name:  Graig Wen

OS 1:50,000 map:  114

Summit Grid Reference (New Position):  SH 39734 94739 
  
Drop:  c 48m


The Trimble GeoXH 6000 gathering data at the new summit position of Graig Wen, with the old position for the summit next to the hill's trig pillar in the background on the left of the photo

For details on the survey that relocated the summit of this hill please click {here}

Myrddyn Phillips (September 2014)




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