Mapping Mountains – Trimble Surveys – Moel y Gamelin

 

27.01.24  Caer Drewyn (SJ 091 444) 

Caer Drewyn (SJ 091 444)

The high point of Caer Drewyn is listed as a Subhump and Trichant.  This would be enough to encourage many a hill bagger to visit, but it is the remains of the Iron Age hill fort that is the main attraction.  The stone walled construction is perfectly placed overlooking two river valleys, with the Afon Dyfrdwy (River Dee) to its south and a tributary to its west.

Cofein reports that the hill fort had three phases of construction, with the initial part surviving as an earthwork to the north-east of the main construction and which is evident close to the high point of the hill, which is known locally after its main feature of the ancient hill fort; Caer Drewyn. 

Mosaic of Caer Drewyn outside the leisure centre in Corwen

The summit of this hill had previously been surveyed by John Barnard and Graham Jackson and it was this that was our objective for the day, that and a meal and catch up and a few hours spent in good company.  We met in Y Bala and wandered in to town for a hearty breakfast in Hoffi Coffi.  After an hour or so of nourishment and conversation we took two cars north-eastward to Corwen and parked on the northern side of the river in the leisure centre car park.  This would enable Mark to head directly back to Mold after the walk and for Aled to drive back to Y Bala where my car had been left, before he continued to Porthmadog and I headed home to Welshpool.

Making our way up the muddied narrow lane

From the convenience of the car park it’s not a great distance to the top of Caer Drewyn, however it is steep and especially so if opting for the direct path, which we followed.  But before the steep part we leisurely walked past the entrance to the leisure centre with me setting a comfortable slow plod at the back, before venturing a short distance up the B5437 road which was closed to traffic beyond its intersection with the bridge that crosses the river to the centre of Corwen.  Beyond the intersection we took the first left and headed up a muddied narrow lane to where a public footpath sign indicated the start of the steep uphill. 

The view south-west during the ascent of Caer Drewyn

Thankfully with a few stops to regain breath and enjoy the ever expanding view the steep bit was not too taxing.  This brought us over a green lane which we used as our descent route before continuing up to the remains of the walled enclosure.  The view extended toward Aran Fawddwy and the pyramidal coned summit profile of Arenig Fawr, and although conditions were overcast both were clear of cloud.  Sadly the sun did not give colour to the land until we arrived back at the cars, but this did not detract from the views, however just a little flash of sunlight can add so much to an overcast day and especially so at this time of year, when the land can become illuminated with the slightest direct sunlight. 

Mark and Aled making their way up the ancient embankment

As Mark and Aled followed a path on the ancient embankment, I kept to another path just below, with each joining near the top of the main walled enclosure.  The high point of the hill was just beyond with a slight descent to a gate and then a manicured green field leading to the summit of the hill. 

The field leading to the summit of Caer Drewyn

The high point of Caer Drewyn consists of a small mound with embedded rock.  I soon had the Trimble aligned with its high point and quickly measured the offset between its internal antenna and the ground at its base, and when the 0.1m accuracy level appeared on the screen I pressed Log and walked away so as not to disturb satellite reception. 

The Trimble GeoXH 6000 gathering data at the summit of Caer Drewyn

Once the equipment had done its stuff and was packed away, only the descent remained, which for me now meant I could at least talk, with much of the uphill consisting of a huff and a puff.  Reversing our inward route to the gate we then followed the green track as it gently lost height and zig zagged around the hill regaining our inward route at the muddied narrow lane.  It proved an ideal hill to visit for this time of year and two hours after setting off we were back at the awaiting cars. 

 

Survey Result:

 

Caer Drewyn (significant name change)         

Summit Height:  313.5m (converted to OSGM15, Leica GS15)

Summit Grid Reference:  SJ 09127 44416 (Leica GS15)

Bwlch Height:  222.7m (LIDAR)

Bwlch Grid Reference:  SJ 09770 45600 (LIDAR)

Drop:  90.8m (Leica GS15 summit and LIDAR bwlch) (Trichant addition)

Dominance:  28.96% (Leica GS15 summit and LIDAR bwlch)

 

 

For further details please consult the Trimble Survey Spreadsheet

 

 

Mapping Mountains – Trimble Surveys – Moel y Gamelin

 

20.06.22  Copa’r Frân (SJ 206 703), Moel y Crio (SJ 199 696) and Moel y Gaer (SJ 210 690) 

Copa'r Frân (SJ 206 703)

The land between Mynydd Helygain in the north and Moel y Gaer in the south is relatively open with occasional houses and farms dotting the landscape.  This area has been mined extensively, mainly for lead and limestone, and it still has a working quarry positioned just to the west of the three hills we planned on visiting today.

I was out with Mark Trengove, who had suggested this walk.  During the restrictions imposed due to Covid-19, Mark had used Moel y Gaer as his go to hill, racking up a multitude of ascents in the process.  This whole area is dotted with greened paths snaking between copious amounts of undergrowth and it proved an enjoyable experience visiting these hills with Mark acting as the local guide.

As an evening meal was planned with Mark and Louise we left our walk until mid-afternoon, by which stage the weather had warmed giving clear heat with a beautiful blue sky above casting vivid colour across the land.

These hills are easily visited as a myriad of narrow lanes criss-cross the area.  We parked close to the small community of Catch and then sauntered over grass heading toward the high masts positioned near the summit of our first hill of the day.

Nearing the top, Mark directed me toward the summit and I soon had the Trimble set-up gathering data.  It was good to be back out on a hill, with a few weeks spent away doing other stuff.  Once data were safely gathered and stored I packed the equipment away and we headed down to the few houses that nestle just below the high point of the hill.  Here we met Tina Cook, who was heading out to collect her daughter from school.  Tina explained that her family is local and she had lived here for 30 years.  We asked about the hill and whether it was known by a name, Tina told us its name is Copa’r Frân, which is also the name of her house.  Thanking her for her time, we left heading south-westward, bi-passing the large compound housing the masts and used a series of green paths toward our second hill of the day. 

Gathering data at the summit of Copa'r Frân

By now the heat of the afternoon was building, this was partly welcome but also rather debilitating.  I was glad of our route which was not too taxing, as the thought of attempting any prolonged walk in these warm conditions was not one to savour. 

Moel y Crio from Copa'r Frân

En route to our next hill we called at a farm and spent the next 15 minutes or so talking with the farmer, who confirmed the name of Moel y Crio for our next hill and proceeded to give us a variety of anecdotes about the local area.  Leaving the farmer, Moel y Crio loomed above with its northern aspect festooned in gorse.  However, my local guide knew where the path was and we were soon plodding our way up steepening slopes to the open ground at its summit.  During data collection we sat on grass below the equipment so as not to disturb satellite reception and munched on an assortment of pick-n-mix. 

The path through the gorse leading to the summit of Moel y Crio

Gathering data at the summit of Moel y Crio

The bwlch for Moel y Crio was positioned between us and our third and last hill of the day; Moel y Gaer, and once the Trimble was packed away I followed Mark down the steep path to the greened land below.  A track crosses the area of the connecting bwlch and we were soon debating where its critical point was positioned.  Once decided upon the Trimble was soon set up gathering its third data set of the day. 

Gathering data at the bwlch of Moel y Crio

Leaving the bwlch I followed Mark as we joined up with a series of narrow paths heading toward a pool, before joining one of the main paths leading up Moel y Gaer.  This hill was definitely the highlight of the day and is a worthy inclusion in the list of The Huws – 100 Great Welsh Hills under 2,000ft. 

Heading toward Moel y Gaer

The area of the summit is enclosed by an impressive ancient embankment which we followed around its southern side.  From this vantage point the view was extensive with late afternoon light enhancing our surrounds. 

On the southerly part of the ancient embankment encircling the summit of Moel y Gaer

A path leads from the embankment detouring toward the summit which consists of an ancient tumulus.  This point was surveyed with the Leica 530 in May 2009 resulting in confirmation that the tumulus is the high point.  However, in 1979 a covered reservoir was built on the summit area and its high point was found to be 0.63m higher than that of the tumulus, but as this is a relatively recent man-made construct it is discounted from the summit height of the hill.

The Trimble was soon positioned aligned with the summit on top of my rucksack with the measurement offset between its internal antenna and the ground at its base noted, and as individual datum points were collected I sat with Mark, below the equipment looking out toward the expanse of Liverpool in the distance. 

Gathering data at the summit of Moel y Gaer

It was now time to head down and a green path led us back to the awaiting car.  It had taken three hours to complete the walk; it proved a leisurely affair in excellent walking country. 

 

Survey Result: 

 

Copa’r Frân  (significant name change)

Summit Height:  286.1m (converted to OSGM15, Trimble GeoXH 6000)

Summit Grid Reference:  SJ 20624 70354 (Trimble GeoXH 6000)

Bwlch Height:  265.7m (converted to OSGM15, Leica GS15)

Bwlch Grid Reference:  SJ 20803 70065 (Leica GS15)

Drop:  20.4m (Trimble GeoXH 6000 summit and Leica GS15 bwlch) (200m Sub-Twmpau addition)

Dominance:  7.12% (Trimble GeoXH 6000 summit and Leica GS15 bwlch)

 

 

Moel y Crio

Summit Height:  297.5m (converted to OSGM15) (significant height revision)

Summit Grid Reference:  SJ 19988 69614 (summit relocation)

Bwlch Height:  276.8m (converted to OSGM15)

Bwlch Grid Reference:  SJ 20406 69385

Drop:  20.7m (200m Sub-Twmpau addition) (Welsh Sub-P15 reclassified to Welsh P15)

Dominance:  6.96%

 

 

Moel y Gaer

Summit Height:  303.7m (converted to OSGM15, Leica 530) 303.8m (converted to OSGM15, Trimble GeoXH 6000)

Summit Grid Reference:  SJ 21065 69078 (Leica 530) SJ 21065 69078 (Trimble GeoXH 6000)

Bwlch Height:  176.2m (LIDAR)

Bwlch Grid Reference:  SJ 11953 75033 & SJ 11953 75031 & SJ 11954 75028 & SJ 11953 75027 (LIDAR)

Drop:  127.4m (Leica 530 summit and LIDAR bwlch) 127.6m (Trimble GeoXH 6000 summit and LIDAR bwlch)

Dominance:  41.97% (Leica 530 summit and LIDAR bwlch) 41.99% (Trimble GeoXH 6000 summit and LIDAR bwlch) 

 

 

For further details please consult the Trimble Survey Spreadsheet

 

Mapping Mountains – Trimble Surveys – Moel y Gamelin

 

20.09.21  Middle Field (SJ 282 533) 

The upper field leading to the summit of Middle Field (SJ 282 533)

The name this hill is now listed by has come from the Tithe and it was the last of four hills visited during a beautiful morning and early afternoon when the sun shone and life took on a very relaxed feel.  The three preceding hills were relatively easy affairs to reach their summits and this hill proved likewise, with my greatest difficulty navigating through a series of roads connecting housing estates that did not appear on my map.  However, I only stopped once to ask onward directions and soon afterward found myself at my designated parking spot. 

I approached the hill from the south having parked close to double gates on a narrow lane, leaving sufficient space for vehicles to pass and to use the gates if needed.  A dried dirt track led from the double gates toward a small quarried area.  A herd of cows lazily looked my way from the adjacent field, with one mother next to a small calf paying particular attention to the rogue hill walker.  I decided to take a wide berth. 

Leaving the dirt track I walked across a rutted section of field toward the boundary fence that would give access to the upper field where the summit of this hill was situated.  Walking toward the fence I aimed for a gap between stunted trees in favour of using a gate which was positioned close to where a number of the cows were still looking my way.  Once over the fence I walked through long grass toward the summit. 

Gathering data at the first of two positions on the summit of Middle Field

Prior to visiting this hill I read online logs on the Hill Bagging website giving two potential positions for the high point, and when I reached the summit area I proceeded to assess the ground from a number of directions and decided to take two data sets, one from the northerly part of the upper hill and the other further south.  Happy with my chosen Trimble set-up positions I activated the equipment to gather data. 

Gathering data at the second of two positions on the summit of Middle Field

Whilst on the summit all was quiet, little stirred, the cows had munched their way over the prow of the adjacent field, the sun shone, a slight breeze whisked across the hill and I was more than happy with my four hill foray to this part of Wales. 

Once the second data set was gathered and stored I headed down the field and re-joined the dried dirt track back to my car.  Before leaving I changed and enjoyed the quiet surrounds before re-joining the busy A483 road back toward Oswestry and then homeward bound to Welshpool. 

 

Survey Result: 

 

Middle Field (significant name change)

Summit Height:  279.7m (converted to OSGM15, Trimble GeoXH 6000)

Summit Grid Reference:  SJ 28217 53386 (Trimble GeoXH 6000)

Bwlch Height:  c 243m (interpolation)

Bwlch Grid Reference:  SJ 27795 53224 (interpolation)

Drop:  c 37m (Trimble GeoXH 6000 summit and interpolated bwlch)

Dominance:  13.12% (Trimble GeoXH 6000 summit and interpolated bwlch)

 

 

For further details please consult the Trimble Survey Spreadsheet

 

 

 

 

Mapping Mountains – Trimble Surveys – Moel y Gamelin

20.09.21  Pt. 212.2m (SJ 304 530) 

The summit field of Pt. 212.2m (SJ 304 530)

After visiting Bryn y Gaer (SJ 313 574) and Windy Hill (SJ 307 548) I navigated my way on to the B5101 road and with map in left hand and steering wheel in right, miraculously chose the right roads to turn on to and found my way driving up a narrow seemingly seldom used lane with overgrown hedgerows scraping the sides of my car.  Cresting the upper part of the lane brought me to houses, where I asked permission to pull my car adjacent to the side of someone’s front gardened wall.  With permission granted I headed for the hill. 

When I say headed for the hill, all this entailed was walking back a few metres up the lane to where a slight gap emerged in the hedge on my right, this would give access to the upper field where the summit of the hill was positioned. 

The gap in the hedge proved fun; it had two strands of floppy barbed wire across it and was relatively narrow, with the hedge consisting of thorns.  I straddled the barbed wire and delicately picked my way through the hedge with a tug and a pull and eventually emerged on a closely cropped grassy field, which online logs indicate is used as a paddock.  When driving toward the narrow lane I noticed a number of horses on the lower part of the field, when on its summit they thankfully remained out of sight. 

It was only a short walk from where I had emerged on to the field to the summit.  When approaching it I assessed the lay of land and zeroed in on what looked to be the high point, when there I put my rucksack down to mark the position.  I then assessed this point from a number of directions and decided to take two data sets, each a few metres apart. 

Having set the Trimble up for its first summit data set I walked back toward the hedge a safe distance away from the equipment, so as not to disturb satellite reception, and waited for the allotted data to be gathered and stored. 

Gathering data at the summit of Pt. 212.2m (SJ 304 530)

After closing the equipment down I repositioned it on the second position I judged to be a contender as high point for this hill and again stood back as the Trimble gathered data.  During data collection I looked west and tried to distinguish where my next hill; Middle Field (SJ 282 533) was positioned.  Since my Ordnance Survey 1:25,000 Explorer map was published there has been redevelopment in this area with a number of new houses and accompanying road networks and therefore trying to pinpoint my next hill in relation to these was not ideal as they did not appear on my map! 

The Trimble set-up position at the summit of Pt. 212.2m (SJ 304 530)

Prior to visiting this hill I had looked at LIDAR, the summit is not yet covered but the bwlch is and having produced an accurate height and position for this, it can now be combined with the result produced by the Trimble GeoXH 6000 survey to give an accurate drop for this hill. 

LIDAR bwlch image of Pt. 212.2m (summit at SJ 304 530)

Once the second data set was safely gathered and stored I closed the equipment down and headed back to the narrow gap in the hedge.  Before attempting my exit I took my rucksack off and put it through the small gap, this at least gave me a semblance of dignity as I struggled through and over the boundary hedge and barbed wire.  Once through the hedge and back on the lane it was only a short walk to my car. 

 

Survey Result: 

 

Pt. 212.2m (significant name change)

Summit Height:  212.2m (converted to OSGM15, Trimble GeoXH 6000) (the same 212.191m height produced by the two Trimble GeoXH 6000 surveys)

Summit Grid Reference:  SJ 30413 53067 & SJ 30417 53061 (Trimble GeoXH 6000) (summit relocation confirmed)

Bwlch Height:  176.9m (LIDAR)

Bwlch Grid Reference:  SJ 29817 53587 (LIDAR)

Drop:  35.3m (Trimble GeoXH 6000 summit and LIDAR bwlch)

Dominance:  16.65% (Trimble GeoXH 6000 summit and LIDAR bwlch)

 

 

For further details please consult the Trimble Survey Spreadsheet

  

Mapping Mountains – Trimble Surveys – Moel y Gamelin

 

20.09.21  Windy Hill (SN 307 548) 

LIDAR image of Windy Hill (SJ 307 548)

The summit of this hill seemed relatively easy to reach, as examining the local roads with the aid of a Google Car showed a convenient parking place just to the north of the summit next to a gravel track and paved drive, with the latter leading to a house.  Above the paved drive was a field and the summit was either in the corner of it or across a boundary wall in a wood that forms a part of a disused quarry. 

I decided against a direct route up the field via the paved drive as it looked as if the land formed a part of the house’s garden.  Instead I opted for the gravel track.  This led past a number of houses with no direct access to the east which would take me up toward the summit.  However, even with direct access the continuing route from this direction did not look welcoming with an overgrown wood and no sign of a path, so I continued until reaching the end of the gravel track at a house named Rock Cottage. 

Once next to the cottage the gravel track swung leftward and upward, I followed it.  I now entered an overgrown small field above and also beside, the cottage.  I hoped this would give access to the field beyond a large unsavoury and overgrown hedge that barred me from where I wanted to go.  It didn’t, so I backtracked and found an alternative path that took me around and up the southerly flank of the hill.  However, although this path was good it was taking me away from the summit so I clambered over a collapsed gate and tried my utmost to avoid a patch of nettles.  Usually collapsed gates are relatively easy to get over, this had other obstacles involved and landing on the other side gave me hope that I would get to the summit in one piece.  I was now in the field leading toward the top of the hill, the view to my north-east opened up looking out across the flatlands leading in to England. 

The path leading toward the collapsed gate

Prior to visiting this hill I had LIDARed its summit and noted the ten figure grid reference to be a few metres from that given on the Hill Bagging website.  I hoped the LIDAR co-ordinates to be correct as it looked as if this was in a field beside the boundary next to the wood and disused quarry, whilst the summit position given on the Hill Bagging website gives the high point a few metres over a fence amongst trees. 

The field leading toward the summit

When I reached the top of the field I activated the Trimble and used it as a hand-help device and zeroed in to the co-ordinates I had noted from the Hill Bagging website, it pointed toward a fence made of cut and fashioned branches.  This was higher than a normal fence and for my no longer young and lithe frame proved another cumbersome obstacle to overcome.  Eventually I made it in to the wood on the opposite side and stood on the mound that Hill Bagging gives as the summit.  This position certainly looked the high point, but the LIDAR position was farther north toward a wall and boundary corner, I headed that way to have a look, but soon came back satisfied that the mound was higher. 

The fence leading in to the wood with the summit just beyond

I examined the ground and found a small embedded rock which I judged to be the high point and therefore I soon had the Trimble set up on top of my rucksack, and with the measurement offset noted between its internal antenna and the ground at its base I set it to ebb down to its 0.1m accuracy level before data should be logged.  This took about 20 minutes to achieve, but I was happy enough in the wood, not doing much, just standing, relaxing and recovering from cumbersome fence crossings.  Once the 0.1m accuracy level was attained I pressed ‘Log’ and stood back and below the equipment so as not to disturb satellite reception. 

Gathering data at the summit of Windy Hill

During data collection nothing else stirred, I ate a boiled egg and waited whilst looking down in to the bottom of the discussed quarry.  Prior to the quarry I suspect the natural summit of this hill was higher than where the Trimble was now placed, with LIDAR contouring suggesting the summit had been quarried away. 

The onward route from the summit and down the field

After five minutes of data were gathered and stored I closed the equipment down and headed to the boundary wall and the path on its opposing side.  This followed the wall down, but I suspected it ended in someone’s back garden or just petered out, so I followed another path adjacent to the fence that formed the boundary with the field where I had been earlier, this thankfully led on to the open field above my car.  I wandered down it and was soon overlooking the house at the end of the paved drive.  Just as I headed toward steps leading down to the paved section a man appeared and I waved and apologised for suddenly appearing in his back garden, he smiled and we chatted for about ten minutes or so.  He told me about the sections of undergrowth he had cut to make the path I had just been on.  He proved very pleasant to meet and when I asked him about the name of the hill, he replied that it is known as Windy Hill. 

 

Survey Result: 

 

Windy Hill

Summit Height:  174.0m (converted to OSGM15, Trimble GeoXH 6000)

Summit Grid Reference:  SJ 30743 54849 (Trimble GeoXH 6000)

Bwlch Height:  131m (spot height)

Bwlch Grid Reference:  SJ 30729 53674 (spot height)

Drop:  43m (Trimble GeoXH 6000 summit and spot height bwlch)

Dominance:  24.73% (Trimble GeoXH 6000 summit and spot height bwlch)

 

 

For further details please consult the Trimble Survey Spreadsheet

Mapping Mountains – Trimble Surveys – Moel y Gamelin

 

20.09.21  Bryn y Gaer (SJ 313 574) 

Bryn y Gaer (SJ 313 574)

With the weather set fine and a pocketful of ten figure grid references I decided to head north again, to a similar area to where I visited four days ago.  Then I surveyed three hills close to Rhydtalog, today I hoped to visit and survey four hills close to Yr Hôb (Hope), Sydallt and Brymbo.  Two of these summits were immersed in woodland, therefore I did not know whether Trimble data could be gathered, but the other two were on open land, and waiting in woods for the Trimble to do its stuff is something that I am now accustomed to, and with the whole day to visit four relatively small heighted hills, I was in no rush whatsoever. 

The first of my four hills planned for the day is situated between the B5373 and the A550 roads and is positioned above the village of Yr Hôb (Hope).  The summit area is wooded and the hill was originally listed under the name of Caer Estyn, which as its name implies is that of an ancient hill fort positioned on the slopes of this hill.  However, the listed name of this hill was changed to Bryn y Gaer when updating the Dominant list. 

Prior to visiting this hill I had read online logs that the wood enclosing the summit mainly consists of birch trees, these are wonderful in autumn as they give a succulent bronzed colour.  I had contemplated leaving this walk for another four – five weeks when that autumnal colour is reaching its peak, but decided to take the opportunity today. 

The sun was shining down from a beautiful early morning sky as I drove toward the hill.  I approached Bryn y Gaer from the south having parked close to the public footpath leading up Rock Lane.  Having walked up the lane past a number of houses I entered the wood and followed a footpath on the left.  This gained height and weaved its way above the remains of a large old quarry.  Sunlight glimmered through the overhead canopy; the path was dry and the hill quiet, it was a wonderful place to find myself at this time in the morning. 

Woodland walks have a beauty all to themselves; they have tranquillity different to that of many hills.  Their pathways lead, and their trees march upward, their enclosed nature is at contrast to that of an open hill and perhaps it is this contrast that is part of their appeal. 

The path leading to the summit of Bryn y Gaer

I continued following the path, one or two alternate routes bisected from it, but the path I had chosen was leading ever upward and so it did until taking me to within a few metres of the summit. 

Prior to visiting this hill I had analysed its summit and bwlch via LIDAR, building up contours and noting each height and ten figure grid reference.  Once at the summit area I switched the Trimble on and compared its co-ordinates with those produced from LIDAR. 

LIDAR image of Bryn y Gaer (SJ 313 574)

Following the LIDAR co-ordinates the Trimble took me in to a morass of bracken and bramble close to the path I had walked on.  I circled a route in the undergrowth testing how solid the ground was and how high in comparison to ground where the path was positioned. 

I thought ground in the morass of bracken and bramble to be the high point, but I was not going to try and set the Trimble up in such diabolical terrain and therefore slowly made my way out of the undergrowth back to the path.  I assessed the path from a number of directions and chose a spot for Trimble placement.  If data were gathered this would at least give me a comparison between its position and that ascertained from LIDAR analysis, although due to the enclosed nature of the set-up position I had little hope that any Trimble data would be accurate. 

It was a long process waiting for the 0.1m accuracy level to be attained before data should be logged.  I waited for about 15 minutes and eventually decided to press ‘Log’ and walked back down another path and stood behind a tree whilst data were gathered and stored. 

Gathering data at the summit area of Bryn y Gaer

It proved a lovely place to stand and just listen to the wood, a quiet experience with just a hint of breeze blown movement.  Some sunlight pieced the overhead canopy, but otherwise I stood in shade and enjoyed every minute of my wait. 

Once data were gathered and stored, I closed the equipment down, packed it away, took a few photographs and retraced my inward route back to my awaiting car.  Here I met a dog walker; we chatted and commented on how lovely the morning was, I asked him about the name of the hill, as I had with a woman taking her daughter out when I first arrived, both told me the hill is named Bryn y Gaer. 

 

Survey Result: 

 

Bryn y Gaer (significant name change)

Summit Height:  153.9m (LIDAR)

Summit Grid Reference:  SJ 31381 57459 (LIDAR)

Bwlch Height:  95.8m (LIDAR)

Bwlch Grid Reference:  SJ 31774 58223 (LIDAR)

Drop:  58.1m (LIDAR)

Dominance:  37.74% (LIDAR)

 

 

For further details please consult the Trimble Survey Spreadsheet