Tuesday, 19 September 2017

Mapping Mountains – Hill Reclassifications – Y Pedwarau


Waun Sidan (SO 250 726) – 400m Sub-Pedwar reclassified to Pedwar

There has been a reclassification to the listing of Y Pedwarau due to analysis of LIDAR data by Aled Williams.  Y Pedwarau is the title for the list of 400m hills of Wales and takes in all Welsh hills at or above 400m and below 500m in height that have a minimum 30m of drop, the list is a joint compilation between Myrddyn Phillips and Aled Williams and it commenced publication on Mapping Mountains on the 30.01.17.

Accompanying the main Y Pedwarau list are five categories of sub hills, with this hill being reclassified from the 400m Sub-Pedwar categoryThe criteria for 400m Sub-Pedwar qualification is all Welsh hills at or above 400m and below 500m in height with 20m or more and below 30m of drop.

Prior to analysis of LIDAR data this hill was listed with 29m of drop based on a basic levelling survey (BLS) conducted by Myrddyn Phillips on the 05.10.03, with the summit height listed as 406m which is taken from the spot height that appears on the Ordnance Survey 1:25,000 Explorer map, based on the map summit height and the BLS these values place the height of the bwlch at 377m.

The name of the hill is Waun Sidan and it is situated in the Maelienydd range of hills with its Cardinal Hill being Bwlch Bank (SO 242 720) and is placed in the Region of Mid and West Wales (Region B, Sub-Region B1).  The hill is positioned above the B 4355 road and the River Teme which are to its north-east, and the A 488 road which is to its south, with the town of Trefyclo (Knighton) towards the east.

As the summit of the hill is not a part of designated open access land permission to visit should be sought, for those wishing to do so the long distance footpath of Glyndŵr’s Way passes just to the south of the summit.

The reclassification of Waun Sidan to Pedwar status is due to the analysis of 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:


Waun Sidan

Summit Height:  407.7m

Summit Grid Reference:  SO 25021 72649

Bwlch Height:  376.3m

Bwlch Grid Reference:  SO 24638 72691

Drop:  31.4m


Therefore, the 407.7m LIDAR data produced for the summit position at SO 25021 72649 and the 376.3m LIDAR data produced for the bwlch position at SO 24638 72691 gives this hill 31.4m of drop which is sufficient for it to be classified as a Pedwar.


The full details for the hill are:

Cardinal Hill:  Bwlch Bank 

Summit Height:  407.7m (LIDAR data)

Name:  Waun Sidan

OS 1:50,000 map:  137, 148

Summit Grid Reference:  SO 25021 72649

Drop:  31.4m (LIDAR data)


The total for Y Pedwarau is now 443 hills with ten additions, and fourteen reclassifications to 400m Sub-Pedwar status since publication of the list by Europeaklist in May 2013.

The overall total for the 400m Sub-Pedwarau is now 218 with 27 hills being added and 22 hills being taken out of this category since publication of the list by Europeaklist in May 2013.

The list of Pedwar hills is available from the Haroldstreet website (January 2014) with all subsequent changes detailed on the Mapping Mountains site, with the list also having commenced publication on Mapping Mountains on the 30.01.17.

For the additions, reclassifications and deletions to Y Pedwarau reported on Mapping Mountains since the May 2013 publication of the list by Europeaklist please consult the following Change Registers:











Myrddyn Phillips and Aled Williams (September 2017)


Monday, 18 September 2017

Mapping Mountains – Hill Reclassifications – Humps


Coed-swydd (SO 139 646) – Hump reclassified to Subhump

This is the twelve in a series of Hill Reclassification posts that detail hills whose status has been altered in the listing of the Humps (HUndred Metre Prominences) through map study and / or surveys that I have instigated.

The hill name used in this and forthcoming posts is that used in the listing of Humps, therefore individual names and their composition may not match those that are used in listings I am directly associated with.  However, I am of firm belief that listed hill names used by other authors should be respected when giving detail within other people’s lists, however inappropriate some hill names or their composition may be considered.

This and forthcoming posts are retrospective as many of these hill reclassifications were initiated from studying the Ordnance Survey enlarged mapping that is hosted on the Geograph website, and for the reclassifications that affected the Humps the email I sent to Mark Jackson and copying in the DJM&M team in relation to this hill was dated 02.08.12.

The listing of Humps was published in book format by Lulu in 2009 and entitled More Relative Hills of Britain, its author; Mark Jackson gives credit to a number of people who contributed toward the formation of this list, these include; Eric Yeaman, Alan Dawson, Clem Clements, Rob Woodall, Bernie Hughes, Pete Ridges and others.  When the list was published in book format there were 2987 Humps listed with their criteria being any British hill that has 100m or more of drop, accompanying the main list is a sub category entitled Subhumps, with the criteria being any British hill that has 90m or more and below 100m of drop.


More Relative Hills of Britain by Mark Jackson


The details for the reclassification appear below:

There has been a reclassification to the listing of the Humps (HUndred Metre Prominences) due to consulting the Ordnance Survey enlarged mapping that is hosted on the Geograph website, with these details being sent to Mark Jackson on 02.08.12.

Prior to this notification Mark Jackson had listed this hill with c 100m of drop, based on the 412m summit spot height that appears on the Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer maps, and an estimated bwlch height of c 312m with its position being incorrectly placed.  However, with a 317m spot height appearing at the bwlch of this hill on the Ordnance Survey enlarged mapping hosted on the Geograph website it meant this hill had less than 100m of drop.  The summit and bwlch height of this hill was examined via Ordnance Survey 1:2,500 mapping with a 1350ft (411.5m) summit height and a 316.3m height at the bwlch confirming this hill has less than 100m of drop.  

Extract from the Ordnance Survey enlarged mapping hosted on the Geograph website showing the 317m spot height on the area of this hill's bwlch

The hill currently appears under the composition of Coed-swydd in the Humps, having previously been listed as Pen Coed-swydd, and it is adjoined to the Elfael group of hills and is situated above the A 488 road which is to its north-west and the A 44 road to its south, with the small communities of Pen-y-bont towards the west south-west and Llandegley towards the south.

The reclassification of this hill from Hump to Subhump status was accepted by Mark Jackson and its new classification augmented in to the listing of the Humps in December 2012.


The full details for the hill are:


Summit Height:  412m (as listed in the Humps)

Name:  Coed-swydd (as listed in the Humps)

OS 1:50,000 map:  148

OS 1:25,000 map:  200

Summit Grid Reference:  SO 13966 64618

Drop:  95m



Myrddyn Phillips (September 2017)






Sunday, 17 September 2017

Mapping Mountains – Summit Relocations – Y Trechol –The Dominant Hills of Wales


Y Trechol –The Dominant Hills of Wales – Summit Relocations

Y Trechol –The Dominant Hills of Wales are the Welsh P30 hills whose prominence equal or exceed half that of their absolute height, accompanying the Dominant list is a sub list entitled The Lesser Dominant Hills of Wales with the criteria for this sub category being those additional Welsh P30 hills whose prominence is between one third and half that of their absolute height.  The list commenced publication on Mapping Mountains on 03.012.15 with its Introduction giving details to its compilation and criteria, with Change Registers also created for the Dominant and the Lesser Dominant category.

The list is authored by Myrddyn Phillips and the posts that have appeared on Mapping Mountains detailing the summit relocations to the Dominant and Lesser Dominant list appear below presented chronologically in receding order.








Y Trechol - The Dominant Hills of Wales - Summit Relocations

Pen y Berth (SJ 081 127) - 2nd summit relocation

Summit survey post for Pen y Berth

Bwlch survey post for Pen y Berth

Significant Height Revisions post for Pen y Bwlch
  

There has been a Summit Relocation to the Y Trichant - The Dominant Hills of Wales list and also the 200m Twmpau (thirty welsh metre prominences and upward) list due to a survey with the Trimble GeoXH 6000, and these details are retrospective as the survey that resulted in this summit relocation was conducted on 19th October 2014.

The survey was conducted in the hills just to the east of the small community of Dolanog, with the hill positioned above the B4382 which is to its south, and above the Afon Efyrnwy which is to its 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 named Pen y Berth, and its prioritised summit position was listed at SJ 080 127 as this is where its 282m summit spot height appears on the Ordnance Survey enlarged mapping hosted on the Geograph website.  This map also shows a twin 282m map heighted summit 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 position was surveyed with the Trimble GeoXH 6000 as was a position on the periphery of the conifer plantation that was visually higher than the remaining ground within the forestry.


The result of each survey appears below:


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 as its position 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 282m map spot height 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 (converted to OSGM15)

Dominance:  46.68%


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)






Y Trechol - The Dominant Hills of Wales - Summit Relocations

Graig Wen (SH 397 947) - 1st summit relocation

Survey post for Graig Wen


There has been a Summit Relocation to the listing of Y Trechol - The Dominant Hills of Wales, with the hill also listed in the 30-99m Twmpau (thirty welsh metre prominences and upward).  This is the first post under this heading and the summit relocation was initiated by a survey with the Trimble GeoXH 6000 with the following details being retrospective as the Trimble survey that resulted in this summit relocation was conducted on 7th September 2014.

The survey 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, with the hill situated north-eastward of the small town of Cemaes, with the nearest major road to the hill being the A 5025 which is 1km directly south of its summit.

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

Its new summit position is 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

Dominance:  52.58%


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)

Saturday, 16 September 2017

Mapping Mountains – Hill Reclassifications – Humps


Fan (SN 672 316) – Subhump addition

This is the eleventh in a series of Hill Reclassification posts that detail hills whose status has been altered in the listing of the Humps (HUndred Metre Prominences) through map study and / or surveys that I have instigated.

This and forthcoming posts are retrospective as many of these hill reclassifications were initiated from studying the Ordnance Survey enlarged mapping that is hosted on the Geograph website, and for the reclassifications that affected the Humps the email I posted on the RHB Yahoo Group forum in relation to this hill was dated 28.05.12.

The listing of Humps was published in book format by Lulu in 2009 and entitled More Relative Hills of Britain, its author; Mark Jackson gives credit to a number of people who contributed toward the formation of this list, these include; Eric Yeaman, Alan Dawson, Clem Clements, Rob Woodall, Bernie Hughes, Pete Ridges and others.  When the list was published in book format there were 2987 Humps listed with their criteria being any British hill that has 100m or more of drop, accompanying the main list is a sub category entitled Subhumps, with the criteria being any British hill that has 90m or more and below 100m of drop.


More Relative Hills of Britain by Mark Jackson

The details for the reclassification appear below:

There has been a reclassification to the listing of the Humps (HUndred Metre Prominences) due to consulting the Ordnance Survey enlarged mapping that is hosted on the Geograph website, with these details being posted on the RHB Yahoo Group forum on 28.05.12.

Prior to this notification Mark Jackson had listed this hill with c 89m of drop based on the 265m spot height given to a triangulation pillar on the Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map and an estimated bwlch height of c 176m based on bwlch contouring at 10m intervals.  The summit area of this hill has two uppermost 260m contour rings with the easterly one being where the 265m trig pillar is positioned, whilst the westerly one is given a 267m summit spot height on the Ordnance Survey enlarged mapping hosted on the Geograph website, this when coupled with an estimated bwlch height of 174m – 175m gives this hill sufficient drop for it to be classified as a Subhump.

Extract from the Ordnance Survey 1:25,000 Explorer map showing the 265m spot height adjoined to the trig pillar on the eastern 260m contour ring

Extract from the Ordnance Survey enlarged mapping hosted on the Geograph website showing the 267m summit spot height on the western 260m ring contour

The hill is adjoined to the Mynydd Mallaen group of hills and is situated overlooking the Afon Tywi (River Towy) and the village of Llangadog to its south-east and the village of Llanwrda to its east.

The addition of this hill to Subhump status was accepted by Mark Jackson and its new classification augmented in to the listing of the Humps on the 19.07.12.


The full details for the hill are:


Name:  Fan

Summit Height:  267

OS 1:50,000 map:  146

OS 1:25,000 map:  12, 186

Summit Grid Reference:  SN 67221 31601

Drop:  c 92 (as listed in the Humps)


Myrddyn Phillips (September 2017)


Friday, 15 September 2017

Mapping Mountains – Summit Relocations – 30-99m Twmpau


30-99m Twmpau – Summit Relocations

The 30-99m Twmpau (thirty welsh metre prominences and upward) are the Welsh hills at or above 30m and below 100m in height that have a minimum drop of 30m.  Accompanying the main P30 list are two sub lists entitled the 30-99m Sub-Twmpau with the qualification to 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, and the Double Sub-Twmpau with the qualification to this sub category being all Welsh hills at or above 20m and below 30m in height with 20m or more and below 30m of drop.

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







Mapping Mountains - Summit Relocations - 30-99m Twmpau

Graig Wen (SH 397 947) - 1st summit relocation 

Survey post for Graig Wen


There has been a Summit Relocation to the listing of 30-99m Twmpau (thirty welsh metre prominences and upward), with the hill also listed in Y Trechol - The Dominant Hills of Wales.  This is the first post under this heading and the summit relocation was initiated by a survey with the Trimble GeoXH 6000 with the following details being retrospective as the Trimble survey that resulted in this summit relocation was conducted on 7th September 2014.

The survey 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, with the hill situated north-eastward of the small town of Cemaes, with the nearest major road to the hill being the A 5025 which is 1km directly south of its summit.

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

Its new summit position is 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

Dominance:  52.58%


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)

Thursday, 14 September 2017

Mapping Mountains – Trimble Surveys – Y Berwyn



19.06.17  Gurn Moelfre (SJ 184 293, only bwlch surveyed [SJ 178 299]), Hen Graig (SJ 176 309), Blaen Trinant (SJ 172 319), Cefn Hir Fynydd (SJ 154 311) and Pt. 432.2m (SJ 163 301)

Blaen Trinant (SJ 172 319)

With the temperature forecast to edge toward 30° I set off early and navigated the narrow country lanes north-east of Llanrhaeadr-ym-Mochnant toward Pantglas Ucha; a farm whose tracks into the hills gave options for parking.  This, and the area around Llanfyllin has drawn me back on numerous occasions of late, the hills hereabouts are mainly green pasture, but are generally steep in nature and shapely in profile, with the whole area quietly nestled in beautiful landscape.

My first objective was to survey the critical bwlch of Gurn Moelfre; one of the most distinct hills in the neighbourhood.  LIDAR data gives this hill’s bwlch on the narrow lane to the north-west of its summit.  Leaving my car I walked down the lane toward the bwlch as Commins and Moel y Gwelltyn; two hills I’d visited less than two weeks ago, looked down from across the valley, both hills have a striking profile and they looked welcoming in their greened summerness with a foreground of sheep whose morning slumbers had been disturbed as I’d passed.


Gurn Moelfre (SJ 184 293)

The shapely profile of Commins on the left and Moel y Gwelltyn on the right

All was quiet at the bwlch as I set the Trimble up, a long wait then developed, one of the longest I’ve had to endure as it took 40 minutes for the required 0.1m accuracy level to be attained before data should be logged.  I found this slightly wearisome as I wanted to gain height before the heat of the day hit.  I checked the equipment every five minutes hoping that the magic 0.1m would be finally showing, during this long wait two cars passed, each I flagged down and waved around my rucksack, the drivers must have wondered what on earth I was doing as it was barely past 8.00am.  I spent much of the time in thought, letting my mind wander to weird and wonderful places, occasionally I would look and concentrate on the mature trees either side of where the Trimble was positioned, they were marvellous things, huge and dominant with luxuriant green leaves edged in the morning’s sun, a dragon fly flew past and I watched it zigging and zagging to and fro, up and down the lane and into the hedgerow and near trees.  The Trimble reached 0.11m accuracy and I thought it would only be another two minutes before the 0.1m mark was attained, unfortunately the accuracy level bounced back up and I almost gave up the whole process, but thankfully I persevered as a few minutes later the magical 0.1m showed itself and I quickly pressed ‘Log’ and hoped that no other cars would appear in the next five minutes, thankfully none did and once five minutes of data were stored I proceeded on a track leading toward Hen Graig; my first hill of the day.

Gathering data at the critical bwlch of Gurn Moelfre


Dappled light

Even at this relatively early hour the sun beat down, I’m prone to flake out when it’s too hot and I’m on the hill, and have experienced times when I’ve wobbled and felt ill due to excess heat, so had come well prepared with four litres of water.  However, as I slowly made progress up the track bending itself around the western slopes of Hen Graig the heat smothered me, and with hardly a breath of breeze it felt like continental Europe was visiting the Welsh uplands for the day.

Pt. 432.2m (SJ 163 301) from the ascent of Hen Graig

Leaving the main track until later I followed a fence line and green track over the connecting bwlch which I planned on surveying on my way down and slowly plodded to the small rocky knoll at the summit of Hen Graig, I’d visited this summit once before in July 2003 and had then connected it up with the other hills I planned on visiting today, but had approached them from a different direction.

Gathering data at the summit of Hen Graig

Leaving the summit I retraced my route back through copious amounts of thistles to the connecting bwlch and used LIDAR data to zero in to the critical point.  As the Trimble gathered its allotted five minutes of data I sat on the earthen bank attached to a fence and rested.

Gathering data at the critical bwlch of Hen Graig

The track I had used on my ascent continued from the area of the bwlch toward the summit of Blaen Trinant, a hill I had previously surveyed using my old wooden staff.  Away in the distance a screeching sound of a tractor floated across the land, I eventually spotted it busying itself on a steep slope.  All around the lushness of summer enveloped the land with green growth seemingly having no bounds, sheep tried in vain to keep in shade prostrate on rutted tracks until disturbed by my approach.  Bulbous cloud sprang up, a greyed white with a hazed blueness to the sky washing out much of the colour, the land slept, still and sombre, quiet in a heat haze.

Leaving the track I headed toward the summit of Blaen Trinant which consists of grazed grass beside the debris of a few breeze blocks.  A constant companion during the early hours was the profile of Gurn Moelfre, it peered down upon proceedings with an almost disdainful look, with its height and shapely outline giving it dominance upon its immediate land.

Gathering data at the summit of Blaen Trinant

Although I’d paced myself and due to the surveying, rested frequently, the heat was piercing and sweat glistened from every pore as I walked down to another rutted track where the critical bwlch of Blaen Trichant is positioned.  I soon had the Trimble set up and gathering data.

Gathering data at the critical bwlch of Blaen Trinant

By now I was starting to wilt and although I had thought of also visiting Garnedd Wen I decided to evaluate the time and how I felt after reaching the high road where the bwlch of my next hill; Cefn Hir Fynydd is placed.  The track I was on forms a part of the Upper Ceiriog Way, and this section led across the upper northern side of Cefn Hir Fynydd, this hill is elongated and its summit was ahead of me shimmering into view, by now I rested at each fence junction where a gate gave further access on the track.  I left the track to step over a dilapidated and rusting gate to gain access to the long grassed summit ridge, this I followed using the grid reference produced by Aled through his analysis of LIDAR data to take me to the high point, this proved to be at the far end of the ridge, by the time I arrived at the high point I needed a rest.

The grass proved so long I flattened it at the summit to give the Trimble a better chance of satellite reception, and once activated I stood back and waited until the customary five minutes of data were gathered.  Just below me a gate gave access back onto the track which led down to the high road where the critical bwlch of Cefn Hir Fynydd is placed, again the grid reference produced by Aled’s analysis of LIDAR data took me to the point where data should be logged, thankfully the convenience of a fence post meant that I could set the Trimble up at this grid reference giving it elevation above its immediate surrounds and also safeguarding it from cars that may come this way.  As data were collected I considered my onward route, I had planned on visiting Garnedd Wen, a hill I had not visited before, and surveying its bwlch summit and the critical bwlch of Mynydd Mawr which is placed further up the narrow road from where I now was.  However, I knew the heat was taking its toll and I was beginning to flag, I looked up toward the land leading to Garnedd Wen and deciding that this hill could wait for another day I packed the Trimble away and followed the narrow road down south-eastward toward Pant-y-maen farm, by the time I arrived it felt as if the whole land was baked in heat as a stillness pervaded all.

Gathering data at the summit of Cefn Hir Fynydd


Gathering data at the critical bwlch of Cefn Hir Fynydd


Garnedd Wen, too hot and too far for me today

I knocked at the door hoping to make place-name enquiries as the last hill of my walk stood steeply above the farm and is unnamed on Ordnance Survey maps, no one was in.  I called out as I walked through the farm yard wondering if someone was working in an outbuilding, again, no response.  Before heading toward the green track leading from the farm yard to the bwlch of this hill I stopped at a water trough where the gentle sound of cascading water flickered in the sunlight, I spent time cupping handfuls of cooling water and splashing it over my face, within a few minutes of leaving the farm and wandering up the green track, my face was dry.

A well needed refreshing break

The bwlch of the last hill proved a blaze of green and having assessed the lay of land I took two data sets, both near one another before packing the Trimble away and slowly gaining height to another track that led up the steepening slopes of this last hill.  I stopped frequently to regain breath and wipe sweat from my brow.

Gathering data at the critical bwlch of Pt. 432.2m

The high point was in a grazing field and as the Trimble gathered data I stood back and savoured the view and the imminent prospect of getting back to my car to change into dry clothes and get my walking boots off. 

Gathering data at the summit of Pt. 432.2m

Heading down the field I spotted a vehicle track through the grass that led to a gate which gave access on to the track where my car was parked, it was only a short route down and one that I took slowly, arriving at the car was a pleasure and getting my boots off more so. 



Survey Result:


Gurn Moelfre

Bwlch Height:  289.5m (converted to OSGM15)

Bwlch Grid Reference:  SJ 17806 29915

Drop:  234m

Dominance:  44.65%




Hen Graig

Summit Height:  433.0m (converted to OSGM15) 
 
Summit Grid Reference:  SJ 17668 30905

Bwlch Height:  392.9m (converted to OSGM15)

Bwlch Grid Reference:  SJ 17457 31308

Drop:  40.1m

Dominance:  9.27%




Blaen Trinant

Summit Height:  442.2m (converted to OSGM15)  

Summit Grid Reference:  SJ 17253 31962

Bwlch Height:  416.8m (converted to OSGM15)

Bwlch Grid Reference:  SJ 16857 31848

Drop:  25.5m (400m Sub-Pedwar status confirmed)

Dominance:  5.76%




Cefn Hir Fynydd

Summit Height:  464.6m (converted to OSGM15) 
 
Summit Grid Reference:  SJ 15499 31174

Bwlch Height:  411.7m (converted to OSGM15)

Bwlch Grid Reference:  SJ 14575 30922

Drop:  52.9m

Dominance:  11.38%




Pt. 432.2m

Summit Height:  432.2m (converted to OSGM15) 
 
Summit Grid Reference:  SJ 16375 30157

Bwlch Height:  357.9m (converted to OSGM15)

Bwlch Grid Reference:  SJ 16231 30803

Drop:  74.4m

Dominance:  17.20%