Showing posts with label Linda Hailstone. Show all posts
Showing posts with label Linda Hailstone. Show all posts

Sunday, 1 August 2021

Mapping Mountains – Trimble Surveys – Fforest Glud


01.06.21  Trefaesyfed (SO 211 609)

LIDAR image of Trefaesyfed (SO 211 609)

Having visited and surveyed Nyth Grug (SO 170 606) and Mynd (SO 181 592) with the added diversion to the base of the Water-breaks-its-neck waterfall, I drove the short distance to Maesyfed (New Radnor), parked in the centre of the slumbering little village and asked a man who was out tending the front of his house the best way to the old castle.  He gave directions and soon Linda was heading up the near path leading toward the church with me contentedly following behind. 

The church in New Radnor

We followed a secondary path beside grave stones up toward where we hoped to gain access to the castle grounds.  However, our route just led to a wired fence, turning around we descended the short distance back to the main path and continued toward the church. 

Follow the path to the kissing gate and the old castle is beyond

Before heading up to the old castle we visited the church and sat in its cooling realm, it was peaceful except for the calling of a bird which squawked loudly from outside.  The person who gave us directions told us to follow the path beyond the church to a kissing gate and as we walked around the front of the church there it was; up ahead. 

Trefaesyfed - the old castle in New Rdanor

Beyond the kissing gate long grass and flowers meandered in the breeze, all ground led steeply up to an extensive area where once the castle was situated, with the remains now incorporating an impressive Norman motte.  As we crested the upper part of the steep ground two people came in to view.  Each sitting beside the other on the escarpment edge, reading books in the sunshine, it was similar to a scene from the Hay Literary Festival. 

Gathering data at the summit of Trefaesyfed

Prior to our visit I had analysed this hill via LIDAR, but even without the aid of LIDAR the high point of the castle’s remains would have been easy to pinpoint and now standing on its top I checked the co-ordinates produced by LIDAR and to within a metre they matched what the Trimble was showing. 

C'mon Phillips, I've had enough of these hills, I'm off to the pub

As the Trimble gathered data I sat with Linda just a few metres from the equipment on the steep summit bank, listening to the beeps as it gathered its individual datum points.  Once the allotted data were gathered and stored, I closed the equipment down, took a few photographs and we headed steeply down past the church to the awaiting car.  The day was rounded off with a good meal sitting in the sun in the beer garden at the back of the Severn Arms pub in Pen-y-bont, this proved a good ending to an excellent day. 

 

Survey Result: 

 

Trefaesyfed

Summit Height:  274.4m (converted to OSGM15, Trimble GeoXH 6000 survey) 

Summit Grid Reference:  SO 21157 60984 (Trimble GeoXH 6000 survey) 

Bwlch Height:  267.2m (LIDAR)

Bwlch Grid Reference:  SO 21030 61031 (LIDAR)

Drop:  7.3m (Trimble GeoXH 6000 summit and LIDAR bwlch)

Dominance:  2.64% (Trimble GeoXH 6000 summit and LIDAR bwlch)

 

 

For further details please consult the Trimble Survey Spreadsheet

 

 

 

  

Friday, 30 July 2021

Mapping Mountains – Trimble Surveys – Fforest Glud

 

01.06.21  Nyth Grug (SO 170 606) and Mynd (SO 181 592) 

Nyth Grug (SO 170 606)

These two hills are positioned to the south of Great Rhos and if so desired can be combined with their higher neighbour.  However, as the summit of Great Rhos was Trimbled five days ago it was just Nyth Grug and Mynd that were on the day’s surveying agenda, and as our planned route took us over the bwlch of Crin Fynydd I hoped to also gather data from this point if the near conifers permitted. 

I was out with Linda today, my old lockdown, keep local walking buddy.  My memories of walking with Linda consisted of ear warmers, balaclavas, wellies and full winter gear visiting the delights of Yr Allt and Y Golfa and its adjacent hills.  Today was an utter contrast to those winter walks as summer had arrived giving warm temperatures on the hills. 

We were walking on the forested path beside the Water-breaks-its-neck waterfall by 9.00am, following dappled light up beneath the canopy of blues and greens.  The path led over a footbridge at the top of the waterfall and then continued downward, we left it at this point and joined a narrower path that led to a public footpath close to Warren House. 

Heading up the path leading to the top of Water-breaks-its-neck

Conditions were warm on this section of the walk and especially so as we headed beside the near conifer plantation up a field where two horses stood in the morning sunshine; one on our path bolt still, the other inquisitively roaming over to investigate the two new arrivals.  Beyond the field we entered forestry. 

Linda emerges out of the wood with Mynd in the background

The path through the forest was a delight and gave shade to the morning’s proceedings.  We stopped at the bwlch of Crin Fynydd, with its summit immersed in conifers just to our south.  It was pointless trying to gather Trimble data from its summit, but I hoped bwlch data could be gathered. 

On the path leading to the bwlch of Crin Fynydd

Whilst I assessed the lay of land Linda chose a spot and bedded down in the sun, she’d worked a 17 hour shift two days ago and deserved a good rest whilst on the hill.  We spent about 30 minutes at this bwlch, I positioned the Trimble facing in three different directions, but every time the 0.1m accuracy level before data should be logged was not attained, and therefore I eventually closed it down without any data having been collected. 

A well earned rest after a 17-hour shift

The bwlch of Crin Fynydd

Our route continued, now on the periphery of the forestry following a good track up valley with the stream feeding the waterfall down on our left.  We left the main track and followed a narrower path that exited the last of the conifers and gained open hillside.  From here to the bwlch of Nyth Grug was beautiful with open hill, few fences, blue sky, roaming sheep, circling Red Kites, a cooling breeze and not another person in sight. 

At the bwlch Linda again lay in the sun without a seeming care in the world.  The critical point of the bwlch was relatively easy to pinpoint and soon the Trimble was set up gathering its allotted data. 

Gathering data at the bwlch of Nyth Grug

Ahead of us lay the greened grazing slopes of Nyth Grug; our high point of the day.  These we followed ever upward, joining the fence that follows the broad ridge until we spotted the trig pillar and then made a direct beeline toward it. 

Having chosen the spot for Trimble placement and set the equipment to gather data I sat with Linda beside a fence looking down to a single wind turbine lazing in the sun.  It was good to be here, the conditions on the lower parts of the hills were proving warm, but on the tops a breeze blew which helped, otherwise the whole day may have been uncomfortably hot. 

Gathering data at the summit of Nyth Grug

Once the allotted data were gathered and stored we headed down the southerly ridge of Nyth Grug helping two lambs on the way, one that had got itself wedged behind a gate and the other whose head was stuck through a part of a wired fence.  I grabbed each by their fleeced coat and lifted them free and watched them shoot off to their mothers, the first jumping in the air as it did so. 

Trapped behind a gate without the knowledge of a reverse gear

The connecting bwlch between Nyth Grug and Mynd was positioned just beyond a ploughed field in another patch of greened grazing land.  Having followed the remnants of the small stream up from the east I positioned the Trimble atop my rucksack, measured and noted the offset between its internal antenna and the ground at its base and sat on the near bank as it quietly beeped away gathering its all-important data. 

Heading toward the connecting bwlch with Mynd

Gathering data at the bwlch of Mynd

Leaving the bwlch we headed uphill toward a track leading to a gate before veering left and aiming for the higher ground, soon we were on the summit of Mynd.  This summit had been LIDARed, therefore the ten figure grid reference led me toward its high point.  As the Trimble gathered data I sat with Linda chatting away with a bag of crisps in hand.

Gathering data at the summit of Mynd

Our route down led toward a descending fence line that connected with a path beside the southerly corner of the conifer plantation that spreads itself northward up valley.  We were now just a steep field away from the car. 

Before heading to Maesyfed (New Radnor) to visit its old castle, I drove the short distance on the continuation of the rough track that leads toward the visitor car park for the Water-breaks-its-neck waterfall.  Having parked we walked downhill to the stream and then followed a good path beside it to the base of the waterfall. 

Water-breaks-its-neck

I’d only been here once before, many years ago.  Then the waterfall was somewhat of a disappointment as the water was no more than a trickle.  Today it was much more impressive.  It wasn’t roaring down the cliff, but it was beautiful with the greened vegetation of ferns and mosses adding succulent colour to the scene.

 

Survey Result:

 

Nyth Grug  

Summit Height:  538.3m (converted to OSGM15)

Summit Grid Reference:  SO 17050 60690

Bwlch Height:  449.0m (converted to OSGM15)

Bwlch Grid Reference:  SO 17391 61800

Drop:  89.3m

Dominance:  16.59%


 

 

Mynd  

Summit Height:  478.7m (converted to OSGM15)

Summit Grid Reference:  SO 18111 59264

Bwlch Height:  410.3m (converted to OSGM15)

Bwlch Grid Reference:  SO 17772 59659

Drop:  68.4m

Dominance:  14.28%


 

 

For further details please consult the Trimble Survey Spreadsheet

 

Tuesday, 11 May 2021

Mapping Mountains – Trimble Surveys – Carnedd Wen

 

08.03.21  Pt. 170.7m (SJ 193 018) and Lower Cil (SJ 185 016)

Pt. 170.7m (SJ 193 018)

Two weeks ago Linda, Nic and I walked on the canal towpath and visited a hill positioned above Berriew which is known locally as Llwynderw Hill.  This gave a good circular walk using the Red Lane as our way back toward our inward route on the towpath.  Today I was out with Linda and had suggested walking beyond where we had previously left the towpath, visiting two relatively small heighted hills before using the lanes and public footpaths close to the summit of Llwynderw Hill as our descent route. 

With strong winds and rain forecast mid-week the continued settled conditions were not to be missed and therefore I met Linda at 11.00am to saunter on the canal towpath, chatting away about all manner of things past the Belan Lock and onward.  The hum of traffic on the Welshpool to Newtown road slowly ebbed in to the distance with silence taking over the land.  This was only broken by our conversation and the ever present background of birdsong.  This is an accompaniment to spring’s arrival when renewed warmth filters down through the chilled months of winter.  Today the conditions were blissful, not in a dramatic sense but in one where contentedness was easily found. 

The canal towpath leading toward our first hill of the day

We stopped for lunch at a picnic table close to where we would leave the canal tow path for a narrow country lane, and once sandwiches, boiled eggs and chocolate bars had been devoured we set off up the lane toward Lower Brithdir, where a public footpath guided us over a stream beside fields full of newly born lambs suckling their mothers as their thin tails wagged this way and that. 

LIDAR image of Pt. 170.7m (SJ 193 018)

Beyond the stream we followed a rising field toward the summit of our first of two hills of the day.  Both had been LIDARed prior to our visit and although it would have been easy to determine the high point of this first hill, I nevertheless used the ten figure grid reference produced by LIDAR to zero in on its summit.  Once found I placed the Trimble on top of my rucksack, measured the offset between its internal antenna and the ground at its base and stood back as six minutes of data were collected. 

Gathering data at the summit of Pt. 170.7m (SJ 193 018)

Once the Trimble was packed away we made our way across the field and called at Cefn-yr-allt, which I hoped was a farm, it wasn’t, so any thought of finding an appropriate name for either the hill or the upper field that had just been Trimbled would have to wait for another day as the person who answered the door could not help with my enquiry. 

LIDAR image of Lower Cil (SJ 185 016)

Our second hill was relatively near and once we were walking down the access track leading to Cefn-yr-allt we looked out for the most convenient way in to the field that rose toward the top of the hill.  Our way up was via a fence beside a particularly boggy area, disturbing two ducks as we did so.  We were soon on top, with the summit crowned by a small brick enclosed water reservoir.  Once I’d chosen the spot for Trimble placement I joined Linda sitting beside the small brick wall below the Trimble and waited for the allotted data to be gathered and stored. 

Gathering data at the summit of Lower Cil

Our onward route took us down to Lower Cil Farm where we met George Pritchard.  We chatted for a number of minutes and he explained that he was the tenant having been here for 34 years, moving from the Oswestry area to farm this land.  He said that the land taking in the summit of this hill is known by the farm name; Lower Cil, a practice that is not uncommon.  George directed us through his farm yard toward the gate which led down to a stream; warning us that getting over the stream may be problematic. 

Across the fields toward the stream 

We sauntered across fields down to the stream, thankfully it proved relatively easy to cross, but the last few days had been dry, following a downpour it would no doubt be a tricky place to get over, and our onward route necessitated us being on its opposing bank. 

A chicken caravan!

Late afternoon with the Breiddin as backdrop

Rising fields soon took us to a track and then lane which brought us to Cefn-hilin; a farm we called at a couple of weeks ago after visiting the summit of Llwynderw Hill.  We now had options for our descent route; all would in time either lead us on to the Red Lane and / or back to the canal tow path.  We opted for a route taking in new ground following a descending lane through Belan and then across fields above the canal with Welshpool spread out before us with the rising Breiddin as backdrop. 

A gentle land

Dusk approaching

It proved a lovely route down, stopping and looking back as the sun sank forever lower leaving a silvered sheen in the sky as dappled clouds were highlighted pink.  I left Linda in town and slowly walked back home happy and content with the day’s outing. 

 

Survey Result: 

 

Pt. 170.7m (significant name changes)

Summit Height:  170.7m (converted to OSGM15, Trimble GeoXH 6000) (significant height revision) 

Summit Grid Reference:  SJ 19323 01898 (Trimble GeoXH 6000) 

Bwlch Height:  132.5m (LIDAR)

Bwlch Grid Reference:  SJ 18115 01656 (LIDAR)

Drop:  38.2m (Trimble GeoXH 6000 summit and LIDAR bwlch)

Dominance:  22.40% (Trimble GeoXH 6000 summit and LIDAR bwlch)


 

 

Lower Cil (significant name change)

Summit Height:  159.3m (converted to OSGM15, Trimble GeoXH 6000) 

Summit Grid Reference:  SJ 18556 01630 (Trimble GeoXH 6000) 

Bwlch Height:  137.8m (LIDAR)

Bwlch Grid Reference:  SJ 18939 01777 (LIDAR)

Drop:  21.5m (Trimble GeoXH 6000 summit and LIDAR bwlch) (100m Sub-Twmapu addition)

Dominance:  13.49% (Trimble GeoXH 6000 summit and LIDAR bwlch)


 

 

For further details please consult the Trimble Survey Spreadsheet

 

 

Monday, 3 May 2021

Mapping Mountains – Trimble Surveys – Carnedd Wen


01.03.21  Gaer Fawr (SJ 223 129)

Gaer Fawr (SJ 223 129)

Glorious early spring sunshine and warmth has dominated over the last two days, but at this time of year conditions can be easily transformed and this morning I set out from my home following the canal towpath as mist and murk hugged the waters and surrounding countryside. 

Misted scene beside the canal towpath

Mist can bring a beauty all its own and as I followed the Rhallt and then Gungrog Fawr Lanes steeply uphill I stopped occasionally to just listen.  Without a breath of breeze and no extensive view one’s world becomes enclosed and mine this morning concentrated on the delicate ebb of a slow flowing brook, whilst bird song wafted from a near hedgerow and almost silent drops of moisture fell from overhanging trees scattering as they did so on the muddied track at my feet.  It was a morning to savour, albeit a bit chilly compared to the last couple of days. 

I was at the crossroads bisecting the Gungrog Fawr Lane and Windmill Lane at 9.15am and waited for Linda to emerge out of the mist five minutes before our pre-arranged meeting time.  Good with time this girl is! 

Our plan for the day was to follow lanes and footpaths down in to Guilsfield and then head up Gaer Fawr, which I’d visited once before in August 2015 along with Alex Cameron during a bagging bonanza of local hills.  It was then awash with late summer green, today the mist lingered. 

Prior to this visit I’d analysed the hill’s numerical details with LIDAR.  Producing an accurate height and position for its connecting bwlch and a height and position for its summit, with the LIDAR summit position being 18 metres from where the Trimble gathered data on my previous visit.  I’d come prepared with ten figure grid references for each and hoped that the lack of summer growth would help in determining the hill’s high point. 

LIDAR image of Gaer Fawr

We followed the paved road past Trelydon Hall and continued toward a quiet lane leading in to Guilsfield, here we diverted to a footpath leading in to a wood which led us to Glanllyn Pool.  This was a surprise as my Ordnance Survey map doesn’t show the pool, but there it was bathed in morning mist resembling an image from the Florida Everglades. 

Glanllyn Pool

Surprises are often welcome additions to any walk and Glanllyn Pool was certainly so.  We happily sauntered beside its waters for ten minutes across the greened and partly muddied walkways and duckboards leading to one of the village’s housing estates.  I then wanted to take us in the wrong direction, which I’m prone to do on occasion. Even with an OS map in hand my navigation skills and sense of direction can be found wanting.  Linda recognised one or two houses and a quick enquiry with a postwoman put us on the right route toward our hill. 

Gaer Fawr is impressive; however its ancient earthworks are now immersed in woodland which although attractive has distracted from the earthen embankments and ditches.  The walk to its summit is enjoyable though and today the misted scene added tranquility to the already quiet nature of this part of Wales. 

Heading up Gaer Fawr

There are a number of paths leading up to the semi-open summit area and once there I set about determining its high point.  I collected data from two points whilst Linda sat patiently on a tree stump as the Trimble ever so slowly crept down to the 0.1m accuracy level before data should be logged.  By the time the second data set was gathered and stored the mist had risen and sun was breaking through the overhead grey cloud cover. 

The summit area of Gaer Fawr

Once the Trimble was packed away we continued over the hill to visit the terracotta wild boar which is an enlarged replica of a bronze wild boar found on the hill during excavation.  Beyond the terracotta piggie we followed a steeply descending path that eventually contoured the lower southerly slopes before finding ourselves back on our inward lane. 

The terracotta wild boar

Glimpse of sunshine on the descent from Gaer Fawr

We then retraced our steps back to the delights of Glanllyn Pool, followed by the Windmill Lane just beyond Trelydan Hall, meeting and chatting with a myriad of dog walkers, goats, horses and of course the occasional sheep! 

The delights of Glanllyn Pool

All that remained was the walk back on public footpaths across fields adjacent to the Windmill Lane to the top of the Red Bank and then down through the grounds of St Marys toward the centre of Welshpool.  It proved yet another excellent little expedition, this time to the wild and salubrious surrounds of Guilsfield.  

 

Survey Result:

 

Gaer Fawr (significant name change)

Summit Height:  217.6m (converted to OSGM15, from previous Trimble GeoXH 6000 survey) 

Summit Grid Reference:  SJ 22394 12995 (Trimble GeoXH 6000 survey) 

Bwlch Height:  138.7m (LIDAR)

Bwlch Grid Reference:  SJ 21991 13145 (LIDAR)

Drop:  78.9m (Trimble GeoXH 6000 summit and LIDAR bwlch)

Dominance:  36.26% (Trimble GeoXH 6000 summit and LIDAR bwlch)

 

 

For details on the 1st survey of Gaer Fawr

For details on the 3rd visit to Gaer Fawr

For details on the 4th visit to Gaer Fawr


 

For further details please consult the Trimble Survey Spreadsheet

 

 

 

  

Saturday, 1 May 2021

Mapping Mountains – Trimble Surveys – Carnedd Wen

 

25.02.21  Llwynderw Hill (SJ 196 036)

LIDAR image of Llwynderw Hill (SJ 196 036)

I’d visited this hill once before in June 2011 and on that occasion the circular walk from my home taking in its summit formed one of a number of preparation walks for the Fisherfield surveys conducted for The Munro Society.  Then I did not have a Trimble, now I do and the hill was within easy striking distance from my home for a socially distanced lock down walk. 

Prior to this re-visit I had examined the details for the hill via LIDAR and noted an accurate height and position for both its summit and bwlch, with the natural summit being prioritised over the higher field boundary. 

Llwynderw Hill is positioned overlooking the Severn Valley and can be easily accessed from the convenience of the Montgomeryshire Canal.  My walking companions for the day were Linda and Nic and we met beside the wharf next to Morrisons car park. 

Linda, Tommy the dog and Nic on the canal towpath

The ducks were shining their bright coloured feathers in the morning sunshine as we leisurely made our way out of town following the canal towpath.  This was a change from what has become the norm of using the Cefnyspin and Frochas Lanes to access Y Golfa and its adjacent hills.  And however beautiful and welcome that route had become it was good to have a change of scene. 

Beyond Belan Lock the opposite side of the canal was awash in dazzling Snowdrops, they shined back at us all whitened standing upright in the late February sunshine as the first warmth of spring continued to take hold. 

Admiring the Snowdrops

We left the canal towpath after almost three miles and headed west up a steepening narrow lane which although highlighted yellow on contemporary Ordnance Survey 1:25,000 Explorer maps, is not recommended to drive up as one steep section is particularly daunting where the paved section has crumbled leaving a ramp.  Thankfully, today we were walking and not attempting to drive. 

Nearing the high point of the narrow lane we accessed a field next to a gate and continued up toward the high point.  The girls found a sheltered spot to indulge in lunch, whilst I sauntered over to the summit zeroing in on the ten figure grid reference produced from LIDAR analysis for the natural high point.  I soon had the Trimble set-up gathering data and re-joined the girls whilst it quietly beeped away collecting its individual datum points. 

Gathering data at the natural summit of Llwynderw Hill

After five minutes data were gathered and stored, I closed the equipment down and sauntered back to join Linda and Nic sitting in the sunshine for a bite to eat and lots of good conversation. 

Nic engaging in an unusual self examination exercise!

We left the field and joined a public footpath leading to Cefn-hilin farm and then onward down the continuation of the lane to another public footpath which headed across fields, over a brook and then beside forestry.  It was beautiful.  It was also quiet and gave a sense of detachment from the world of Covid and lock down restrictions, with increasing warmth as late morning gave way to early afternoon. 

Our route toward Lower Pwll and the Red Lane

Friendly horse

The footpath led down to Lower Pwll and the Red Lane, which we happily followed past the entrance to Powis Castle and eventually back to our inward route on the canal towpath. 

The greens of late February

The walk took about seven hours and was very enjoyable and relaxed with good company, views, lots of laughs and another summit Trimbled.  It had been another good day on the hill!

 

Survey Result: 

 

Llwynderw Hill (significant name change)

Summit Height:  237.9m (converted to OSGM15, Trimble GeoXH 6000) 

Summit Grid Reference:  SJ 19600 03662 (Trimble GeoXH 6000) (summit relocation confirmed)

Bwlch Height:  159.7m (LIDAR)

Bwlch Grid Reference:  SJ 18827 03989 (LIDAR)

Drop:  78.3m (Trimble GeoXH 6000 summit and LIDAR bwlch)

Dominance:  32.89% (Trimble GeoXH 6000 summit and LIDAR bwlch) (Lesser Dominant deletion)

 

 

For further details please consult the Trimble Survey Spreadsheet