Showing posts with label Surveys: 37 Beacon Hill. Show all posts
Showing posts with label Surveys: 37 Beacon Hill. Show all posts

Sunday, 3 October 2021

Mapping Mountains – Trimble Surveys – Beacon Hill

 

17.07.21  Farrington Bank (SO 305 699) 

Farrington Bank (SO 305 699) and the Spaceguard Centre

I’d visited Farrington Bank previously and when last there, Trimbled its summit.  This hill is classified as a Pedwar and the Trimble survey de-twinned it from its adjacent summit positioned beside the observatory at the Spaceguard Centre.  Each summit is given a 417m spot height on contemporary Ordnance Survey 1:25,000 Explorer maps. 

On my last visit the summit area of Farrington Bank consisted of a closely cropped grazing field.  Today it was awash in breeze blown barley.  Prior to visiting I had contacted the Spaceguard Centre and gained permission to park and visit the triangulation pillar which is placed at the rear of the observatory.  This is close to where LIDAR gives the high point of this part of the hill, which is beside a fence and picnic table a few metres from the trig pillar.  Although the summit of Farrington Bank is higher, it is always worthwhile visiting the other top, purely as having an observatory so near the top of a hill is an experience in itself. 

I left my car parked on a flat area of land at the end of the track leading to the access gate to the upper field of Farrington Bank.  Beyond the gate was barley, which was a surprise as I expected the same closely cropped grass that I encountered on my last visit. 

Following the vehicle track through the barley on Farrington Bank

Looking toward the summit of Farrington Bank

Heading through the barley were a number of vehicle tracks, these we followed until close to the high point, which was only a short detour to get to.  Recently I’d visited a summit on the outskirts of Meifod planted in wheat.  Again a vehicle track led close to this hill’s high point and again the wheat swayed in unison with a cooling breeze.  Today the barley did likewise, it was softer than the wheat and gave a gentler feel and formed a lush crop that meandered across the hill swaying this way and that, all greened with emerald touches accentuated by the afternoon light.  It was wonderful to walk through. 

Approaching the summit of Farrington Bank

Crossing the summit of Farrington Bank

Afterward we visited the other top leaving the car in the small parking area for the observatory, and the woman who I had spoken to on the phone came out to greet us.  She told us the history of the observatory and its purpose, before we sauntered around the side of the building to visit the high point beside the fence and picnic table and then the trig pillar at the rear of the building. 

The Spaceguard Centre

Once back at the car I drove down the narrow lane to Knighton and then up the B4357 and turned on to the B4355 where I parked in a convenient lay-bi beside the road.  This gave easy access to Hawthorn Hill (SO 287 677); a Pedwar whose summit was about a mile away.  I was tempted to join Aled, but as I had visited the hill and as the heat was still uncomfortably warm I remained at the car and waved Aled off watching him disappear down the track over the connecting bwlch and out of sight up the hill. 

Aled heading off toward Hawthorn Hill

The ascent didn’t take him long.  I was happy enough waiting at the car, which was parked in shade.  I changed in to dry clothes and luxuriated in getting my walking boots off, cooling down and taking on lots of liquid.  It was good to just stop and do little.  I watched sheep doing the same in the opposing field, some hardened souls still munched in the sunlight, but the majority were slumbered down lying in shade.  It had been another good day on the hill with lots achieved.  It had also been an exceedingly warm day on the hill, with what we did just enough to enjoy and not too much to hinder. 

 

Survey Result: 

 

Farrington Bank (significant name change)

Summit Height:  416.7m (converted to OSGM15, from previous Trimble GeoXH 6000 survey)

Summit Grid Reference:  SO 30500 69937 (from previous Trimble GeoXH 6000 survey) (summit relocation confirmed)

Bwlch Height:  c 294m (interpolation)

Bwlch Grid Reference:  SO 27464 69909 (interpolation)

Drop:  c 123m (Trimble GeoXH 6000 summit and interpolated bwlch)

Dominance:  29.52% (Trimble GeoXH 6000 summit and interpolated bwlch)

 

 

For details on the survey of Farrington Bank

 

For further details please consult the Trimble Survey Spreadsheet

 

 

 

 

 

 

Wednesday, 30 June 2021

Mapping Mountains – Trimble Surveys – Beacon Hill

 

22.04.21  Rhos Crug (SO 167 743), Pool Hill (SO 177 753), Cnwch Bank (SO 178 746), Pt. 487.8m (SO 184 751), Beacon Hill (SO 176 767) and Stanky Hill (SO 163 764) 

Beacon Hill (SO 176 767)

Seasonal change can bring beauty to the hills, be it the greens and warmth of summer merging to autumn’s chilled morning’s and coloured display or this then turning in to the deadened winter months.  The merging in to spring is always welcome when that first seasonal warmth heralds new growth and when walking in the hills winter gear is dispensed in preference for short sleeved tops and shorts.  Although winter can bring magical days when new crisply laden snow is almost ethereal in nature, its passing in to spring brings radiance with longer daylight hours and the strengthening of the sun.  And today, with ever present blue skies above, welcome warmth offset by a cooling breeze and the constant background sound of serenading Skylarks, there were few other places that I would prefer to be other than on the Radnorshire hills. 

The higher Radnorshire hills are moorland in nature, with heather and rough grass dominating.  However, many of these hills have good tracks and paths leading between them and in many instances to their summits.  They are in the main open hills, with few fences enclosing their land.  And with that ever present song of Skylarks chirping against a brisk early morning breeze with an unadulterated blue sky above and no one else on the hill; today I could not imagine any other place so welcoming and giving tranquillity and peace of mind. 

Today I had a circuit of six hills planned, with each summit and many of their connecting bylchau to survey.  I’d visited four of these hills before, but not as a combined walk.  The highest; Beacon Hill I had last visited in 2005, and prior to this only once before in 2000. 

I was parked to the west of my first hill of the day; Rhos Crug, and walking up the narrow lane leading north by 8.20am.  Rhos Crug is easily identified from its surrounding hills as it has the remains of two distinctive ancient tumuli on the area of its summit, and as I walked up the lane these and the hill they are a part of rose above the valley and the River Aran which gently flowed down valley below me.  I soon headed down to the river, which at this point is no more than a stream and found a crossing place before quietly making my way up through pastured fields where lambs scampered in the early morning sunshine. 

Looking toward Fforest Glud from the ascent of Rhos Crug

The pastured fields gave way at a fence boundary to the upper part of the hill where a good track follows the western ridge of Rhos Crug ever upward toward its high point, only merging to a narrower path near its summit.  I made good progress toward the summit with its high point the top of the westerly tumulus and soon after arriving the Trimble was set up gathering data. 

Gathering data at the summit of Rhos Crug

During data collection I stood below the tumulus and looked out on the moorland surrounds and wondered how much of my onward route would be through rough grass and heather.  I also picked out the next two survey points, each a contender for this hill’s bwlch position and after the Trimble had gathered its allotted summit data I sauntered back down the narrow path toward a dried pool which constitutes one of the potential bwlch positions. 

Gathering data at the first of two positions surveyed for the bwlch of Rhos Crug

Having gathered the allotted data beside the dried up pool I wandered over grass and between clumps of heather to the continuation of the ridge that connects Rhos Crug with its higher neighbours of Pool Hill and Beacon Hill.  This route now consisted of what for these hills is one of the main earthen tracks.  The second point surveyed for the bwlch position of Rhos Crug was just to the south of this rack.  Progress was being made but there were still many summits and bylchau to survey. 

Gathering data at the second of two positions surveyed for the bwlch of Rhos Crug

My next objective was the summit of Pool Hill which from this direction looked a bulk of a moorland hill with little weakness, with it protected by moor grass and heather, but again one of the beauty of these hills are the tracks and paths leading from one to another, and approaching the summit of Pool Hill from the direction of Rhos Crug was a relatively easy affair. 

Rhos Crug and the source of the River Lugg

The summit of Pool Hill consists of a large patch of closely cropped grass which is at contrast with its moorland surrounds.  The Trimble was soon set up gathering data.  During data collection I basked in the morning sunshine and looked back on my inward route and that of the route ahead. 

Gathering data at the summit of Pool Hill

My next two hills lay in the opposite direction to the main continuation of this walk toward Beacon Hill, one lay directly to the south of the summit of Pool Hill and the other toward the east, both are listed as 400m Sub-Pedwar hills and I had not visited either. 

The route down from Pool Hill toward the bwlch connecting with the first of these two hills; the 499m map heighted Cnwch Bank could easily have been rough, but it wasn’t.  Tracks, paths and moor grass led between the heathered slopes down to the connecting bwlch.  The area of the bwlch after prolonged rain would no doubt be an uninviting boggy realm, but today the moor grass was crisp and dry.  The land hereabouts is quite wild, although it does have another one of the arterial routes between these hills crossing over it. 

Gathering data at the bwlch of Cnwch Bank

The bwlch and summit of Cnwch Bank had previously been LIDARed by Aled.  I had for many years wanted to visit this hill as its map height is a tantalising 1m below the 500m height and today after surveying its bwlch I followed sheep paths up its heathered slopes to its summit. 

The connection between Pool Hill and Cnwch Bank was the roughest underfoot conditions I experienced during the day, but this was never difficult.  The ground was dry and the moor grass crisp and the going relatively easy. 

Gathering data at the summit of Cnwch Bank

Once summit data were gathered and stored I left Cnwch Bank and retraced my route back to its connecting bwlch and followed the path north-eastward toward the next bwlch that connects with the second 400m Sub-Pedwar, which remains unnamed on the map.  As I crossed the bwlch I quickly assessed the lay of land and decided to press on to its summit, leaving the bwlch survey for my return. 

The summit of this hill was relatively easy to pinpoint and as the Trimble gathered data I watched a tractor chug up the track leading to Beacon Lodge, which is positioned close to a conifer plantation taking in much of the southerly domain of this hill.  The tractor disappeared around a corner and that was the only other human movement I saw on these hills during the day.  I always find meeting a fellow hill walker welcome when on the hill, even if only a wave of recognition is given, it is an acknowledgement toward someone of like mind, greetings and conversation are again always welcome, but it is also a pleasure to be on a hill and not meet or see another person, this form of fleeting solitude brings a perverse sense of contentedness and comfort. 

Gathering data at the summit of Pt. 487.8m (SO 184 751)

I was soon back at the connecting bwlch and having picked my preferred position for its critical point I set the Trimble up and listened as it quietly beeped away collecting its individual datum points.  This bwlch is placed close to another one of the main tracks that head through these hills, but whereas the tracks from earlier in the walk were earthen and green, this one was gravelled and its route was easy to follow as it meandered above the upper reaches of Lawn Brook toward the hill named as Fron Rocks on contemporary Ordnance Survey maps. 

Gathering data at the bwlch of Pt. 487.8m (SO 184 751)

Once the Trimble had gathered and stored the allotted data I joined the gravelled track and followed it toward the eastern flank of Beacon Hill, only diverting from it to explore the connecting bwlch of Pool Hill.  I had thoughts that this bwlch would consist of a large moorland bog, but in reality it was a short walk on closely cropped grass to another dried up pool.  This was the last bwlch survey of the day and as the Trimble gathered data I sat and looked up at Beacon Hill and marvelled at the blue sky above, which from this position was now a deeply rich colour. 

The track leading toward Beacon Hill

Gathering data at the bwlch of Pool Hill

During much of this walk the song of the Skylark accompanied me.  These little birds are a delight during spring time.  They flutter and chirp against a blue and radiant sky bringing solace to wearied legs.  Whilst sitting on a clump of grass scribbling all necessary details in my surveying notebook as the Trimble gathered its last bwlch data set of the day, I looked up and watched one of these little birds as it sang.  Its wings flapped against the breeze and its song pieced the quiet surrounds and gave such a beautiful background sound to the day. 

I was nearing the end of the walk, but still had two summit surveys to conduct and having left the connecting bwlch of Pool Hill I re-joined the gravelled track for a short distance as it began to gain height, only leaving it in preference for a green track that headed up toward the summit of Beacon Hill. 

Once at the summit I positioned the Trimble on top of my rucksack with its internal antenna aligned with the highest ground which is about 1 metre from the base of the triangulation pillar that marks the summit of Beacon Hill.  Then after measuring the offset to the ground at its base I waited for the 0.1m accuracy level to be attained before data should be logged and once the equipment was activated to gather data, I again sat and soaked in my surrounds.  It was good to be back on this hill after a sixteen year interval. 

Gathering data at the summit of Beacon Hill

All that remained was the summit survey of Stanky Hill; which I had surveyed on two previous occasions, once with my old basic levelling staff and the second with John, Graham and Aled when we gathered data with the Leica 530 and also line surveyed the hill for drop.  This time I wanted to Trimble the summit. 

Leaving the summit of Beacon Hill I followed a good path down to its connecting bwlch with Stanky Hill and then continued up to the last summit of the day.  When we had gathered data from this summit with the Leica 530 we positioned the equipment on an area of loose stones close to a small pool.  I knew where this position was, but when I arrived I examined the surrounding land and compared this position to that of a small grassed hummock that when I stood on its top, was solid.  This small grassed hummock was higher than the position where Leica data had previously been gathered, the grassed hummock was solid, natural and definitely a part of the hill and therefore it was where I positioned the Trimble to gather summit data. 

Gathering data at the summit of Stanky Hill

Once the allotted data were gathered and stored, I packed the equipment away and descended the south-westerly slopes of Stanky Hill, veering eastward to join the main greened path heading down toward Rhydhir farm. 

Beacon Hill from the descent of Stanky Hill

By now the chilled morning breeze had been replaced by afternoon warmth and by the time I arrived in the farmyard at Rhydhir I was looking forward to a few minutes rest.  This soon turned in to a welcome 20 minutes, as I met Roy and Mair Wilson and their son; Rhys, a lovely family more than welcome to give their time to a stranger who had just turned up at their home. 

Rhys, Mair and Roy Wilson of Rhydhir farm

Local farmers are usually a hive of information and we chatted about the hills and their names and also names of lower places, all around the valley that Roy and Mair call home.  It was a delight to meet them at the end of this walk and having thanked them for their time I headed toward the narrow paved lane that wound its way back to my car. 

 

Survey Result: 

 

Rhos Crug

Summit Height:  508.9m (converted to OSGM15)

Summit Grid Reference:  SO 16712 74388 

Bwlch Height:  488.5m (converted to OSGM15)

Bwlch Grid Reference:  SO 16625 74662

Drop:  20.4m

Dominance:  4.01%


 

 

Pool Hill

Summit Height:  514.9m (converted to OSGM15)

Summit Grid Reference:  SO 17726 75373 

Bwlch Height:  450.6m (converted to OSGM15)

Bwlch Grid Reference:  SO 17761 76003

Drop:  64.3m

Dominance:  12.48%


 

 

Cnwch Bank

Summit Height:  499.2m (converted to OSGM15)

Summit Grid Reference:  SO 17876 74628 

Bwlch Height:  473.6m (converted to OSGM15)

Bwlch Grid Reference:  SO 17840 74933

Drop:  25.6m

Dominance:  5.12%


 

 

Pt. 487.8m

Summit Height:  487.8m (converted to OSGM15)

Summit Grid Reference:  SO 18492 75116 

Bwlch Height:  465.8m (converted to OSGM15)

Bwlch Grid Reference:  SO 18226 75154

Drop:  22.0m

Dominance:  4.51%


 

 

Beacon Hill

Summit Height:  547.6m (converted to OSGM15)

Summit Grid Reference:  SO 17644 76792 

Bwlch Height:  368.0m (LIDAR)

Bwlch Grid Reference:  SO 07104 84228 (LIDAR)

Drop:  179.6m (Trimble GeoXH 6000 summit and LIDAR bwlch)

Dominance:  32.80% (Trimble GeoXH 6000 summit and LIDAR bwlch)


 

 

Stanky Hill

Summit Height:  506.9m (converted to OSGM15, Trimble GeoXH 6000)

Summit Grid Reference:  SO 16394 76419 (Trimble GeoXH 6000) 

Bwlch Height:  476.4m (converted to OSGM15, Leica 530)

Bwlch Grid Reference:  SO 16861 76416 (Leica 530)

Drop:  30.5m (Trimble GeoXH 6000 summit and Leica 530 bwlch) (Dewey addition)

Dominance:  6.02% (Trimble GeoXH 6000 summit and Leica 530 bwlch)

 

 

 

For further details please consult the Trimble Survey Spreadsheet

Thursday, 10 June 2021

Mapping Mountains – Trimble Surveys – Beacon Hill


04.04.21  Thirteen Acres (SO 161 725), Fron Hir (SO 138 730), Caergynan Bank (SO 132 710), Warren Bank (SO 138 703), Maelienydd (SO 143 713) and Mount Aire (SO 162 707) 

Warren Bank (SO 138 703)

Yesterday I opened the Explorer map number 214 to Llanidloes & Newtown, as I unfolded it the first hill I saw marked on the map I had not been up.  The hill was positioned in the Radnorshire area, which can give wonderful walking in quiet surrounds.  As I examined the area around the hill there were another two adjacent P30s that again I hadn’t visited, near these were three P20s that I had also not been up.  All could easily be combined in a good circular walk.  I rarely open a map and decide to visit the first hill I look at as my hill walking is usually based on more of an agenda.  With this circuit taking in six hills I spent an inordinate amount of time checking each against LIDAR for numerical detail and the Tithe map for the most appropriate name for those hills unnamed on contemporary maps.  With ten figure grid references and names noted I gathered all necessary equipment; set my alarm for 6.30am and the following morning headed to the hills east of Llanbister. 

LIDAR image of Warren Bank (SO 138 703)

I was parked and walking by 8.30am with a definite chilled feeling in the air.  My car thermometer recorded – 3° degrees passing over the Dolfor between Newtown and Llandrindod and vestiges of frost still clung to the ground as I made my way up the paved access road to Park Farm. 

Looking back at my car from the access road to Park Farm

Nearing Park Farm I heard voices and therefore I called out, three young children soon appeared and I asked if their Mum or Dad were in.  They went to get their Dad; when Matthew Williams arrived we chatted in the beautiful early morning sunshine for 15 minutes or so.  I explained my interest in upland place-names and he told me the field where the high point of my first hill of the day is situated is known as Thirteen Acres, he then gave me further directions and permission to visit and survey it. 

Matthew Williams of Park Farm

I left Matthew and followed the course of a public footpath through a series of gates until arriving at an old track.  Turning right on the track brought the high point of the first hill within easy access on my right.  I was soon at the summit with the Trimble positioned on the natural high point quietly beeping away gathering data. 

The way to the hill

To my south the sound of a quad bike became ever more distinct and there was Matthew out in an adjacent field dropping feed off for the sheep.  As I packed the Trimble away he had progressed to the upper field, I waved over and he did likewise.  As I left the field two other quad bikes came zooming over, one of his young daughters and his younger son were heading my way, they looked rather funny as the quad bikes were so small and yet they drove them with obvious confidence, they said ‘hi’ and zoomed off back to their Dad. 

Gathering data at the summit of Thirteen Acres

The Williams family out feeding the sheep

Now back on the old track I followed this west and down toward a ford.  Before losing height I picked out my next hill; Fron Hir directly in front of me away in the distance, its upper section devoid of grass as it had recently been seeded.  Arriving at the ford I found a scattering of seven dead sheep strewn either side of the stream.  A great shame in such a beautiful setting, if they had been discarded once dead it was unwarranted, if dying of natural courses it was worrying.  Be it encountering this or a lack of adherence to the map I do not know, but instead of following the public footpath on the continuation of the track upward, I followed a track to the left which contoured its way toward Lower Cantel farm where I was met with mud and slurry.  I quickly realised I was on the wrong route but pressed on and eventually arrived on the narrow paved lane at its low point as it makes its way from Crossways toward the north over the eastern flank of Maelienydd toward the south. 

Fron Hir (SO 138 730)

Spring time

It proved a slow plod up the lane, but I was in no rush, the morning’s chilled start had been replaced by warming conditions with slight heat haze and unadulterated blue sky.  I left the lane to make my way over fields toward the summit of Fron Hir and once at its high point set the Trimble up to gather its allotted data. 

Approaching the summit of Fron Hir

Away to my south a distinctive clump of fir trees stared back at me, this was the summit of Warren Bank which would be my fourth hill of the day, it looked quite a distance away and between me and it was another hill; Caergynan Bank. 

Gathering data at the summit of Fron Hir

I headed directly south from the summit of Fron Hir and descended straight on to the paved road beside Fron Ganllwyd farm, where I flagged down Tom Lewis who was in his tractor.  We chatted in the sunshine for quite some time.  He kindly directed me through his farmyard toward the track and then over the wilds of the Maelienydd; a remnant of common land that was at odds with much of the green pastored fields hereabout. 

Tom Lewis of Fron Ganllwyd

Leaving Tom I followed his directions and headed toward a thin group of conifers keeping to a track that wound its way up to a small disused quarry.  From here a green path led over the Maelienydd, as this continued it began to peter out to no more than a sheep path.  The going underfoot was never problematic, the clumps of moor grass were not yet green and in prime and although there were patches of wetness no substantial bog was encountered. 

I was soon over the moor and emerged on to another narrow paved road and quickly headed for a wide green path that headed up toward the top of Caergynan Bank.  Looking back at the moor it looked a wild and inhospitable place.  I met four people near the summit of Caergynan Bank having a picnic with two on trail bikes.  I stopped and chatted.  The ten figure grid reference produced from LIDAR analysis zeroed me in to the high point of the hill and I was soon standing away from the survey equipment as it gathered its third data set of the day. 

Gathering data at the summit of Caergynan Bank

Leaving the summit I waved over at the picnickers and headed south-east following a green path down to the narrow road.  I followed this to where it became a track; ahead of me was a quad bike which had just buzzed its way down the field that I planned on walking up.  This was obviously the local farmer, but by the time I had walked up the track to the gate leading in to the field he was now buzzing around a lower adjacent field. 

Walking up the field to a gate giving access to the next field the sound of the quad bike became louder and as I looked around it was heading my way.  I sauntered back to the gate and chatted with Steve Nicholls; the farmer from Mere House.  Steve was out with his son and was extremely helpful and kindly let me continue toward the high point of the hill to survey it. 

Steve Nicholls and son of Mere House

The summit of Warren Bank consists of manicured grass close to the south-easterly of two fir tree plantations that Steve told me his father had planted many years ago.  To my east I could see my car, a small white dot parked beside the entrance drive to Park Farm; it looked a long way away.  By now the breeze had strengthened, which was forecast, thankfully this never hampered the surveying and gave comfort in the warming conditions. 

Gathering data at the summit of Warren Bank

Once the Trimble had gathered summit data I retraced my inward route back to the narrow paved road and followed this eastward to where a vehicle track headed north up the moored southern flank of Maelienydd.  This brought me close to its summit which is crowned by a small cairn.  It was good to be on this summit; this hill is easily distinguished by its moorland surrounds and stands out amongst its near and adjacent hills. 

The moorland surrounds of Maelienydd

I savoured having a rest as the Trimble gathered data, standing in the sunshine looking back on my route and ahead toward the last hill of the day whose summit was relatively close to where I had parked my car. 

Gathering data at the summit of Maelienydd

I contemplated heading back down the vehicle track across the moor to gain the paved road, but decided to follow the continuation of the track across the eastern part of the hill, this proved a lovely route down and soon brought me to the road.  By now the afternoon colour was aglow with vestiges of high wisped clouds in the sky.  It was wonderful to be on these hills; meeting farmers, listening to Skylarks, looking up at Red Kites as they gracefully used rising thermals to then glide across the sky.  Wales amazes me with its diversity of upland landscape, over the last few walks I’d experienced the gentleness of the hills near my home, the rocky surrounds of the hills above Ffestiniog and the open landscape of Radnorshire, all are wonderful places to visit that keep pulling me back time after time. 

A startling tree on the way down the narrow road from Maelienyd toward Mount Aire

The narrow paved road led down to the River Aran before reclaiming its lost height and continuing uphill, I left the road to slowly walk up a steep path on the near hillside that crested the rise between where my car was parked and another narrow road that led toward the last hill of the day. 

Once on the next road I then followed another greened path that led to the concrete access track to Upper Pentre farm, here I met Hywel Rees who was heading out on his quad bike.  We chatted for quite some time; he kindly gave me permission to visit and survey the high field which was just behind us.  The Tithe names this upper field as Wheat Piece, Hywel told me that it is now known as Mount Aire, a wonderful name. 

Hywel Rees of Upper Pentre

I was soon at the summit of Mount Aire with the ten figure grid reference produced via LIDAR leading me to its high point.  As the Trimble gathered its sixth and last data set of the day I marched off a safe distance from it so as not to disturb satellite reception and lay on the manicured grass looking up at an iridescent blue sky as the sun sparkled overhead and a Red Kite circled above me.  I watched the Red Kite for a number of minutes, mesmerised by its beauty and ease of passage across the sky. 

Gathering data at the summit of Mount Aire

Once the Trimble was packed away I used a lower gate to access the concrete track leading to Upper Pentre and followed this back to the paved road, soon leaving it for a sheep path heading over the small lump between me and my car, which was only a few minutes walking distance away.  I arrived back at the car at 3.30pm; it had been a seven hour walk taking in six hills with each summit surveyed and two new names catalogued, and all in wonderful sunshine meeting some lovey people on the way. 

 

Survey Result: 

 

Thirteen Acres (significant name change)

Summit Height:  381.4m (converted to OSGM15, Trimble GeoXH 6000)

Summit Grid Reference:  SO 16129 72592 (Trimble GeoXH 6000) 

Bwlch Height:  c 319m (interpolation)

Bwlch Grid Reference:  SO 17072 72823 (interpolation)

Drop:  c 62m (Trimble GeoXH 6000 summit and interpolated bwlch)

Dominance: 16.37% (Trimble GeoXH 6000 summit and interpolated bwlch)


 

 

Fron Hir

Summit Height:  393.1m (converted to OSGM15, Trimble GeoXH 6000)

Summit Grid Reference:  SO 13807 73013 (Trimble GeoXH 6000)   

Bwlch Height:  324.0m (LIDAR)

Bwlch Grid Reference:  SO 14609 74350 (LIDAR)

Drop:  69.1m (Trimble GeoXH 6000 summit and LIDAR bwlch)

Dominance:  17.58% (Trimble GeoXH 6000 summit and LIDAR bwlch)


 

 

Caergynan Bank (significant name change)

Summit Height:  349.8m (converted to OSGM15, Trimble GeoXH 6000)

Summit Grid Reference:  SO 13239 71026 (Trimble GeoXH 6000)   

Bwlch Height:  326.7m (LIDAR)

Bwlch Grid Reference:  SO 13128 70875 (LIDAR)

Drop:  23.1m (Trimble GeoXH 6000 summit and LIDAR bwlch)

Dominance:  6.59% (Trimble GeoXH 6000 summit and LIDAR bwlch)


 

 

Warren Bank

Summit Height:  348.5m (converted to OSGM15, Trimble GeoXH 6000)

Summit Grid Reference:  SO 13803 70384 (Trimble GeoXH 6000)   

Bwlch Height:  325.5m (LIDAR)

Bwlch Grid Reference:  SO 13603 70747 (LIDAR)

Drop:  23.0m (Trimble GeoXH 6000 summit and LIDAR bwlch) (Sub-Trichant addition)

Dominance:  6.60% (Trimble GeoXH 6000 summit and LIDAR bwlch)


 

 

Maelienydd (significant name change)

Summit Height:  361.4m (converted to OSGM15, Trimble GeoXH 6000)

Summit Grid Reference:  SO 14373 71358 (Trimble GeoXH 6000)   

Bwlch Height:  320.9m (LIDAR)

Bwlch Grid Reference:  SO 13757 71419 (LIDAR)

Drop:  40.5m (Trimble GeoXH 6000 summit and LIDAR bwlch)

Dominance:  11.20% (Trimble GeoXH 6000 summit and LIDAR bwlch)


 

 

Mount Aire (significant name change)

Summit Height:  336.1m (converted to OSGM15, Trimble GeoXH 6000)

Summit Grid Reference:  SO 16235 70786 (Trimble GeoXH 6000)   

Bwlch Height:  308.8m (LIDAR)

Bwlch Grid Reference:  SO 16253 71635 (LIDAR)

Drop:  27.2m (Trimble GeoXH 6000 summit and LIDAR bwlch)

Dominance:  8.10% (Trimble GeoXH 6000 summit and LIDAR bwlch)

 

 

 

For further details please consult the Trimble Survey Spreadsheet