Showing posts with label Surveys: 36 Cilfaesty. Show all posts
Showing posts with label Surveys: 36 Cilfaesty. Show all posts

Monday, 25 July 2022

Mapping Mountains – Trimble Surveys – Cilfaesty

 

31.05.22  Trehafren Hill (SO 100 910, previously Trimbled) 

LIDAR image of Trehafren Hill (SO 100 910)

It was turning dusk when Charles and I left the cinema in Newtown, we had boosted Charles’ P30 total with a quick visit to Beddau (SO 185 977) before the film and now Charles wanted another quick tick and Trehafren Hill was perfect to do this.

This hill is positioned close to the centre of Newtown and having last visited in July of 2021, I knew a way up.  However, Charles had come well prepared and with mobile phone in hand directed us toward the hill and proceeded to point us in the direction of a parking area which according to whatever he was looking at on his phone screen indicated the best way up the hill.  His phone was correct!

I parked and soon joined Charles who had walked through a gap between houses and was close to where a narrow gravelled path started up the hill.  We followed this as it snaked its way up, only leaving it to head up grassed paths which conveniently cut corners. 

On the summit of Trehafren Hill

It felt good to be visiting a hill at this time of day.  I am much more a morning person when hill walking and enjoy that cooling air of early morning when height can be gained before the heat of the day builds.  For such a hill as this that has little ascent, that need to set off early is not necessary, but the routine is now set firmly in place and has been for many years.

Considering that the weather had not been at all welcoming for the majority of the day with prolonged heavy rain, the evening was proving delightful.  It was not dramatic on top with illuminated cloudscapes, but there was a distinct sense of height having been gained as the flickering lights of Newtown began to cast their spell below.

We stayed on top for a few minutes before heading down following our inward route back to the awaiting car and then drove home to Welshpool for a well-earned mug of tea. 

 

Survey Result: 

 

Trehafren Hill (significant name change)

Summit Height:  152.8m (converted to OSGM15, from previous Trimble GeoXH 6000 survey)

Summit Grid Reference:  SO 10020 91073 (from previous Trimble GeoXH 6000 survey)  

Bwlch Height:  115.4m (LIDAR)

Bwlch Grid Reference:  SO 10146 90923 (LIDAR)

Drop:  37.4m (Trimble GeoXH 6000 summit and LIDAR bwlch)

Dominance:  24.50% (Trimble GeoXH 6000 summit and LIDAR bwlch)

 

 

For details on the survey of this hill

For further details please consult the Trimble Survey Spreadsheet

 

 

Saturday, 25 September 2021

Mapping Mountains – Trimble Surveys – Cilfaesty


14.07.21  Trehafren Hill (SO 100 910) 

Trehafren Hill (SO 100 910)

Many years ago I lived in Trehafren; a housing estate in Newtown.  Then I never realised this hill existed, although I’m sure I noticed it as I drove in and out of the estate to go to work each day.  It is a fine small hill, one that in the main consists of grass with the usual stunted trees and brambles dependent upon one’s approach. 

I only realised its existence when I started compiling the Welsh P30 lists that where published on Geof Crowder’s v-g.me website and Mike Grant’s Evergreen website.  When I first came upon it on the map I was surprised; a P30 in the middle of Newtown.  It is hills like this that make the P30s so wonderful to visit; they consist of an abundance of variety from grandiose 3,00oft’s to grassy hills in housing estates. 

Having driven in to the housing estate I stopped my car, wound down the window and enquired with a man whether he was local, and if so whether he knew where a path started to visit the hill.  He had a push chair and baby with him and was suffering in the heat which was rapidly building up compared to the cooler climes of 6.30am when I stood on top of Pen y Gelli (SO 180 909); my first hill of the day. 

He directed me to the second turning on the right where a car park was situated, and asked me to wait for him there until he scouted out the route.  By the time I had got all necessary equipment and locked my car, he had come back around the corner and told me to turn left just beyond a green fence where a small gate then gave access to the hill. 

I was thankful of his help as on my previous visit to this hill in January 2004 I approached from the north through undergrowth, and that was in the winter, today in high summer the path I was directed toward was a great help.  But even this was overgrown in its initial part.  Once past the long grass, brambles and a rogue nettle or two, I followed a path through the long grass to the gravelled section which now forms a part of a BMX circuit on the hill. 

Just through the initial brambles and the narrow path leads toward the summit of the hill

Following the BMX circuit for a while I then joined a path through grass leading to the hill’s high point.  The summit is a marvellous viewpoint with the northern section of the Pegwn Mawr hills away to the west and the ridge with the two summits each known as Top Field (SO 114 890 and SO 110 879) that I had just visited and surveyed away to the south.  I stopped to savour the view for a while before assessing the lay of land.  Having decided the high point the Trimble was soon set up and gathering data. 

Gathering data at the summit of Trehafren Hill

Prior to visiting this hill I had analysed it with LIDAR and produced a height and position for both summit and bwlch.  The summit position produced by LIDAR although useful for my purpose on the hill was not necessarily all-important as even without its aid the high point of the hill was not difficult to pinpoint. 

LIDAR image of Trehafren Hill (SO 100 910)

I found the high point a metre or so from the narrow path that crosses this hill’s summit ridge in a west to east direction.  During data collection I stood to the east of the equipment and waited for allotted data to be gathered and stored. 

The Trimble GeoXH 6000 set-up position at the summit of Trehafren Hill

After closing the equipment down I took a number of photographs with the Trimble on top of my rucksack and breeze blown long grass surrounding it.  It proved a good summit to end the day’s hill bagging and surveying on. 

The Trimble GeoXH 6000 set-up position at the summit of Trehafren Hill

I arrived back at my car at 1.20pm, with in all seven hills visited and surveyed, six being P30s and one a P20 sub.  Six of the seven were new hills for me and all relatively local to where I live.  By the time I arrived home the temperature was soaring and I was glad of that early morning start! 

 

Survey Result: 

 

Trehafren Hill (significant name change)

Summit Height:  152.8m (converted to OSGM15, Trimble GeoXH 6000)

Summit Grid Reference:  SO 10020 91073 (Trimble GeoXH 6000)  

Bwlch Height:  115.4m (LIDAR)

Bwlch Grid Reference:  SO 10146 90923 (LIDAR)

Drop:  37.4m (Trimble GeoXH 6000 summit and LIDAR bwlch)

Dominance:  24.50% (Trimble GeoXH 6000 summit and LIDAR bwlch)

 


For details on the 2nd visit to this hill 

For further details please consult the Trimble Survey Spreadsheet

  

Thursday, 23 September 2021

Mapping Mountains – Trimble Surveys – Cilfaesty


14.07.21  Top Field (SO 110 879) 

Top Field (SO 110 879)

When planning the day’s outing I initially did not include this hill, mainly as it is not classified as a P30, but instead a sub, a P20.  The former are collected by the avid hill bagger, at an alarming rate for many, whilst the latter are almost an afterthought, visited by the dedicated few.  However, many P20s are excellent hills in their own right, and being a person who rarely thinks detrimental thoughts about any hill, I try and visit those hills that are classified as P20s when times allow. 

This hill is situated just southward of the previous hill I had visited and was the sixth of seven hills visited and surveyed during the day.  The day had started just after 6.30am on a quiet and tranquil hill known as Pen y Gelli (SO 180 909) and continued to Bryn Pant y Drain (SO 178 885), before visiting the summit of Pen Aran Hill (SO 137 888) and then Cold Weston (SO 141 907).  The fifth hill is another whose uppermost field is known as Top Field (SO 114 890) and it was only a short drive farther south on the same hill ridge and narrow lane until I found a good parking place just below the upper field where the summit of the second Top Field is situated. 

I contemplated heading straight up the field from an adjacent gate, but as this was in full view of a near house, I decided to walk up the lane away from the summit and by doing so I was soon in the adjacent field and doubling back toward the summit of Top Field.  Between me and it was a fence and a little lower an access gate, I opted to loose height to use the gate.  The upper field of Top Field was strewn with thistles interspersed amongst yellowish grass which added colour to the scene. 

Nearing the summit of Top Field

I had LIDARed this hill for its summit and bwlch height and position and when nearing the high point I used the Trimble as a hand-help device to zero in to the summit position compared to the co-ordinates produced from LIDAR analysis.  However, the summit would not be difficult to pinpoint by just using one’s eye. 

LIDAR image of Top Field (SO 110 879)

When at the summit I positioned the Trimble atop my rucksack, took a measurement offset between its internal antenna and the ground at its base, waited for the 0.1m accuracy level to be attained before data should be logged, and once this figure appeared on the screen I pressed ‘Log’ and scampered away so I was below the equipment and therefore not obstructing it from a clear view of those all-important orbiting satellites. 

Gathering data at the summit of Top Field

The Trimble GeoXH 6000 set-up position at the summit of Top Field

Once the allotted five minutes of data were gathered and stored I closed the equipment down, took a few photographs and packed it away.  Having done what I wanted to do I opted for the easier and direct route back to my car and quietly sauntered down the field to the access gate which was close to where I had parked.  Just one hill remained to visit for my seven hills of the day; Trehafren Hill (SO 100 910) which is positioned above a housing estate in Newtown. 

 

Survey Result: 

 

Top Field (significant name change)

Summit Height:  373.8m (converted to OSGM15, Trimble GeoXH 6000) (significant height revision)

Summit Grid Reference:  SO 11015 87958 (Trimble GeoXH 6000)  

Bwlch Height:  346.1m (LIDAR)

Bwlch Grid Reference:  SO 11279 88639 (LIDAR)

Drop:  27.7m (Trimble GeoXH 6000 summit and LIDAR bwlch)

Dominance:  7.42% (Trimble GeoXH 6000 summit and LIDAR bwlch)

 

 

For further details please consult the Trimble Survey Spreadsheet

 

  

Tuesday, 21 September 2021

Mapping Mountains – Trimble Surveys – Cilfaesty

 

14.07.21  Top Field (SO 114 890) 

Top Field (SO 114 890)

If wanting an easy, quick ascent of this hill it can be accomplished in no more than five minutes as a narrow road follows the crest of the ridge and passes its summit just to its east.  Such lanes don’t have many options to park, however for this particular hill there is adequate space to park directly opposite a double gate and fence that gives access to the upper field where the summit of the hill is positioned. 

Just below the summit is a large chicken barn adjoined to Blackhill farm, once over the double gate and fence it is only a short distance past an enclosed covered water reservoir on closely cropped grass to the summit of the hill.  The high point is adjacent to another enclosed patch of land, which may be connected with the water reservoir. 

Gathering data at the summit of Top Field

When I visited all was quiet except for the occasional hum of a forklift working at the chicken compound, otherwise I had the hill to myself.  I positioned the Trimble on the highest part of land outside of the second compound about a metre from the perimeter fence.  On the opposite side of the fence in the enclosed section were copious amounts of thistles which were higher than the fence, otherwise I would have positioned the equipment on a convenient fence post to give it elevation above its immediate surrounds.  For this survey my rucksack was used as an improvised tripod which would have to suffice, as it has done for hundreds of surveys over recent years. 

If not for the thistles the Trimble would be positioned on the fence post

Once the Trimble was gathering data I stood a few metres away from it and looked down on Newtown in the valley below.  This was my fifth of seven planned hills during the day, and my last; Trehafren Hill (SO 100 910) stared back at me from the confines of Newtown surrounded by housing estates.  It looked a fine small hill to end the day’s bagging and surveying expedition on. 

The Trimble set-up position at the summit of Top Field

After allotted data were gathered and stored I closed the equipment down, took a few photographs and packed it away and retraced the few metres back to my car and then drove the short distance to the large chicken shed where I met a young man operating the forklift.  I enquired about the hill which was just behind us and explained my interest in its name.  He couldn’t help but said that his boss was due back soon and he could give him a ring if I wanted.  Yes please was my reply!  I then spent a few minutes on the phone talking to Prosser James; the farmer from Blackhill who told me he did not know an individual name for the hill but its upper field where the summit is situated is known as Top Field.  Thanking him for his time and happy with another hill visited and surveyed, and another name documented I drove back to the narrow lane and continued south-west on the same ridge to a sub hill that the Tithe map also names as Top Field (SO 110 879), this was going to be my sixth hill of the day and I wanted to visit it and Trehafren Hill before the warm conditions increased to such an extent that it made any form of hill walking uncomfortable. 

 

Survey Result: 

 

Top Field (significant name change)

Summit Height:  382.5m (converted to OSGM15, Trimble GeoXH 6000)

Summit Grid Reference:  SO 11407 89077 (Trimble GeoXH 6000)  

Bwlch Height:  c 312m (interpolation)

Bwlch Grid Reference:  SO 10743 87070 (interpolation)

Drop:  c 70m (Trimble GeoXH 6000 summit and interpolated bwlch)

Dominance:  18.43% (Trimble GeoXH 6000 summit and interpolated bwlch)

 

 

For further details please consult the Trimble Survey Spreadsheet

 

 

 

 

Sunday, 19 September 2021

Mapping Mountains – Trimble Surveys – Cilfaesty

 

14.07.21  Cold Weston (SO 141 907) 

LIDAR image of Cold Weston (SO 141 907)

Cold Weston; a name derived from the Tithe map, is similar to many hills of comparable height with its upper field used for pasture.  Many such hills are not dramatic in nature, but they are well worth visiting and if time permits, also exploring, as they usually have a quiet ambiance with many affording excellent views, and this hill was no exception.  However, one difference being is that the local farmer accompanied me to the summit of this hill and helped find its high point in the long summer grass. 

I contemplated approaching this hill on a public footpath from the north-west but decided to drive up the access track to Weston farm to ask permission to park and visit the high point of the hill.  The farm is positioned just below the summit to its south. 

This hill was the fourth of a planned seven during the morning and early afternoon, as I wanted to leave the hills before conditions became too warm and driving to just below the summit was a good way to shorten this particular walk. 

Prior to visiting this hill I had analysed it via LIDAR and build up contours until a single point gave its summit position.  Its bwlch is not yet covered by LIDAR, therefore for listing purposes its bwlch height, at the present, is reliant upon a 237m spot height that appears on the Ordnance Survey 1:50,000 Landranger map. 

My day’s route was taking me from just east of Kerry, winding its way back and forth across the intervening A489 road and ending on Trehafren Hill (SO 100 910), which is positioned in Newtown.  I had only previously visited the last planned hill, so all others were new to me, and even though these hills are relatively small in height it is the exploration and investigation that I enjoy and this is enhanced when visiting new ground. 

As I left the main road I turned right on to a minor lane and then immediately right again on the gravelled track leading to Weston farm.  I had only driven a few metres up the track before I spotted a tractor in the adjacent field cutting silage; I stopped and waved over to it.  I was soon in conversation with Edward Jones who kindly gave permission to park at his farm to visit the hill, before leaving he asked if I could call at the farm house as his wife may wonder what I was doing. 

Donna Jones of Weston farm

I continued up the track and soon parked in the farm yard.  As I left my car, Donna; Edward’s wife, was walking down toward me, I waved and we chatted for a number of minutes.  I explained what I hoped to do and she said ‘follow me’ and away we went past the farm house to a gate giving access up a field to another gate, beyond which was the upper field where the summit is situated. 

It’s only on occasion that I end up on a summit with a local farmer and such an opportunity is one to relish.  I stood on top with Donna with the two of us assessing the summit area of the hill for its highest point before I placed the Trimble atop my rucksack to gather data. 

Gathering data at the summit of Cold Weston

During data collection we stood below the equipment chatting away about all manner of things.  Once allotted data were gathered and stored I closed the equipment down and took a few photographs of Donna on the summit beside the Trimble. 

Donna Jones at the summit of Cold Weston

The view from the top took in the whole of Newtown and down the Severn Valley to the Breiddin close to Welshpool and the higher hills to the west.  It was a wonderful summit to stand on and talk with the local farmer, the opportunity to do so doesn’t occur very often, but when it does it is always welcome. 

 

Survey Result: 

 

Cold Weston (significant name change)

Summit Height:  306.0m (converted to OSGM15, Trimble GeoXH 6000)

Summit Grid Reference:  SO 14188 90749 (Trimble GeoXH 6000)  

Bwlch Height:  237m (spot height)

Bwlch Grid Reference:  SO 13525 90858 (spot height)

Drop:  69m (Trimble GeoXH 6000 summit and spot height bwlch)

Dominance:  22.54% (Trimble GeoXH 6000 summit and spot height bwlch)

 

 

For further details please consult the Trimble Survey Spreadsheet

 

 

 

 

Friday, 17 September 2021

Mapping Mountains – Trimble Surveys – Cilfaesty

 

14.07.21  Pen Aran Hill (SO 137 888) 

Pen Aran Hill (SO 137 888)

This was my third hill of the morning and having left a high narrow lane where I had parked for the ascent of Bryn Pant y Drain (SO 178 885), I drove down to the A489 road and the small community of Kerry, where I then headed south and found the minor road that took me up to my next hill of the day, which having made subsequent place-name enquiries is being listed as Pen Aran Hill. 

As with many smaller heighted hills, the upper part of Pen Aran Hill is no more than a relatively high field, albeit a field that gives an extended view.  Prior to visiting I had examined this hill via LIDAR and found two tops separated by 1mm in height, each placed at or beside a perimeter hedge and fence.  I planned on visiting the two tops and survey each. 

LIDAR image of Pen Aran Hill (SO 137 888)

I parked close to a gate giving access to the high field, with another gate directly opposite already open.  I later found that Philip Davies was in the opposite field cutting grass for silage.  Philip is the local farmer and confirmed the field name for where the summit of this hill is situated as the Long Field and the field where he was working as the Big Field, and he knows the hill as Pen Aran Hill.  The Pen Aran part of this name is a composition taken from the Ordnance Survey series of Six-Inch maps, with the composition on contemporary Ordnance Survey maps being Penarron. 

Philip had also cut grass in the Long Field and as I accessed it through a gate, great swathes extended across the upper hill in lines leading to its high point.  It was only a short distance to the first southerly LIDAR summit.  I stopped and quickly assessed the lay of land before continuing to the farther northerly LIDAR summit.  It is the latter that many people recognise as the high point of this hill.  On my way I came to an intermediary top, again I stopped and looked back and tried to assess its height relative to the other two summits.  It seemed that three surveys were necessary to attempt to split these tops. 

Continuing to the farther northerly top I used the Trimble as a hand-held GPS unit to zero in to the ten figure grid reference produced by LIDAR.  This point of the hill has a hedge signifying the field boundary.  The Trimble was soon set up and within a few minutes it was activated to gather data. 

Gathering data at the northerly top of Pen Aran Hill

During data collection I stood below the equipment and spotted a tractor in the opposing field, this was Philip who I later visited.  Once data were gathered and stored I headed back to the intermediary top and again set the Trimble up and collected a second data set.  This top is beside a fence and gives extensive views. 

Gathering data at the central top of Pen Aran Hill

It was only a short distance from here back to the most southerly of the three tops, which like the northerly is beside a mature hedge.  The Trimble was soon set in place gathering its third data set from this hill. 

Gathering data at the southerly top of Pen Aran Hill

The hedge gave way a little lower to a perimeter fence and during data collection I stood and looked out toward what would be my fifth and six hills of the day, each like this one were positioned beside a narrow road leading across their upper ridge.  These two hills are now listed by the same name; Top Field, with the name of the higher of the two positioned at SO 114 890 found from local enquiry and the lower which is positioned at SO 110 879 found from the Tithe map. 

As the Trimble gathered data this proved a lovely place to stand and have the world pass me by.  Compared to earlier in the morning cloud had now built up with the sun casting light and shade with shadows moving across hillsides adding depth to perspective.  I was in no particular rush, but did want to visit Penarron farm which is positioned just below the upper field.  I hoped I could find the local farmer and confirm an appropriate name for this hill and therefore once the Trimble had gathered allotted data I closed it down, packed it away and made my way through the swathes of cut grass back to my car. 

I was soon parked at the entrance to Penarron farm and walking in to the back yard, where Ivor and Rhydian Powell were encouraging three cows in to a trailer.  I volunteered my help and tapped one on its hind quarters, they were soon all safely in, more from the expertise of the two people I had just met rather than from the encouragement that I had given. 

Ivor and Rhydian Powell

I explained my interest in the hill and its name, and Ivor and then Rhydian told me that the adjacent and slightly lower field is known as the Pike and that the upper field where I had been surveying is known as the Long Field.  We spent a number of minutes talking about the hill but they needed to get away with the three cows, before doing so they told me the person who I should go and talk to was Phil who was in the field cutting silage and who had farmed these hills all his adult life. 

Therefore I drove back up the road, parked in the pull-in spot where I had left my car to visit the hill and went through the opposing open gate and down the field where Phil was in his tractor cutting great swathes of grass.  I waited for him to head my way and waved over, he soon stopped and we chatted for ten minutes of so.  Phil told me the names of the two opposing fields, the Pike and the Long Field and the Big Field for where we now were.  I asked him about the name of the hill and he said he knows it as Pen Aran Hill. 

Philip Davies

Before leaving I asked if I could take some photographs and he kindly got out of his tractor and stood in the sun beside it.  I thanked him for his time and waved my goodbyes and walked back up the field to the open gate. 

The day was progressing well with three hills visited and surveyed and one new hill name and three field names documented.  The fourth hill of the day; Cold Weston (SO 141 907); a name given on the Tithe map, required driving back in to Kerry and then a mile or so north-west before heading up the access track to Weston farm where I hoped to find the local farmer to ask permission to park and visit the summit, and hopefully confirm the name of the hill. 

 

Survey Result: 

 

Pen Aran Hill (significant name change)

Summit Height:  368.0m (converted to OSGM15, Trimble GeoXH 6000)

Summit Grid Reference:  SO 13710 88852 (Trimble GeoXH 6000) (summit relocation confirmed)  

Bwlch Height:  324.6m (LIDAR)

Bwlch Grid Reference:  SO 13561 88411 (LIDAR)

Drop:  43.4m (Trimble GeoXH 6000 summit and LIDAR bwlch)

Dominance:  11.79% (Trimble GeoXH 6000 summit and LIDAR bwlch)

 

 

For further details please consult the Trimble Survey Spreadsheet

 

 

 

 

 

Wednesday, 15 September 2021

Mapping Mountains – Trimble Surveys – Cilfaesty


14.07.21  Bryn Pant y Drain (SO 178 885) 

Bryn Pant y Drain (SO 178 885)

Bryn Pant y Drain was the second of a planned seven hills to survey during the day.  Prior to visiting, each hill had been analysed with available LIDAR.  For this hill both its summit and bwlch are covered, therefore with accurate bwlch data all I wanted to survey was its summit. 

LIDAR image of Bryn Pant y Drain (SO 178 885)

This hill had stared back at me across the intervening valley from my first hill of the day; Pen y Gelli (SO 180 909).  I contemplated approaching the summit from the north-east on a bridleway following the hill’s main broad ridge, but parking places for this approach were few and far between.  Therefore, I opted to approach the hill from its north driving up a steep narrow lane past an occasion house before the lane crossed a cattle grid in its upper section and then turned to a concrete ramp before an earthen track continued to Upper Highlands farm.  Thankfully there was sufficient space to park where the concrete ramp ended and the earthen track continued. 

It was 8.10am when I locked my car and headed up the hill.  None of these seven hills required long walks, many where easy and if not for surveying each summit, would only require a few minutes to the high point and back to the car.  However, this hill necessitated the longest walk, and even this was relatively short! 

A track is marked on contemporary Ordnance Survey maps heading up this hill from the end of the paved minor lane.  I’d overshot this and continued up the concrete ramp, but as I left the car I followed a stone track leading up the adjacent field, this led through an open gate to a rising field beyond.  The track marked on maps was relatively close and to my right, but as sheep tracks wound their way up toward two mature trees I headed straight up toward them. 

Even by this time of the morning the sun and the steep uphill had brought sweat to my brow.  I stopped occasionally to look back toward my car and over the valley to Pen y Gelli; an inconsequential, quiet rounded green lump, but a good small hill nonetheless. 

Beyond the mature trees I aimed for a gate and once on the other side I rested.  I was now on the continuation of the track marked on the map, which hereabouts swung eastward and eventually joined the bridleway heading down the hill’s north-easterly broad ridge. 

Early morning on Bryn Pant y Drain

I followed the green track for a short distance and then struck out toward the summit which LIDAR indicates is beside a fence.  By the time I arrived at the summit any lingering early morning clag that cloaked some of the higher hills was a distant memory as blue sky now dominated. 

Having assessed the lay of land and compared the ten figure grid reference from the Trimble against that produced by LIDAR I decided to place the Trimble on a fence post and measured a 1.00m offset between its internal antenna and ground at its base.  Once the 0.1m accuracy level before data should be logged was attained I pressed ‘Log’ and stood back and under the equipment. 

Gathering data at the summit of Bryn Pant y Drain

A cooling breeze blew across the hill during data collection, which was welcome.  As allotted data were gathered I checked the map and tried to pinpoint some of the other hills on the day’s surveying and bagging agenda. 

Once allotted data were gathered and stored I closed the equipment down, took a few photographs, packed it away and happily retraced my inward route back to my car.  It had taken 55 minutes to visit and survey the summit of this hill, the next hill of the day; my third, was positioned to the south-west of Kerry and needed at least two tops surveyed for its summit position and as it has no name on contemporary Ordnance Survey maps I also wanted to make place-name enquiries.  The day was progressing nicely, albeit also heating up. 

 

Survey Result: 

 

Bryn Pant y Drain

Summit Height:  383.8m (converted to OSGM15, Trimble GeoXH 6000)

Summit Grid Reference:  SO 17865 88597 (Trimble GeoXH 6000)  

Bwlch Height:  327.0m (LIDAR)

Bwlch Grid Reference:  SO 18253 88345 (LIDAR)

Drop:  56.7m (Trimble GeoXH 6000 summit and LIDAR bwlch)

Dominance:  14.78% (Trimble GeoXH 6000 summit and LIDAR bwlch)

 

 

For further details please consult the Trimble Survey Spreadsheet