20.10.15
Wynnstay Park (SJ 310 429) and Pentre Clawdd Gorse (SJ 311 442), only bwlch surveyed
The grounds of Wynnstay Park |
The Wynnstay Estate was
the family seat of the Wynns, a family whose land owning prowess included much
of the southern part of north Wales. The
main house on this old estate has now been converted to flats and private
houses. The high point of Wynnstay Park
is a potential P30 with a summit spot height of 141m and a bwlch spot height
that is not centred on the valley to valley traverse of 113m, with another summit ; Pentre Clawdd Gorse (SJ 311 442) being potentially higher.
I parked beside the
entrance to the estate grounds at SJ 311 433 next to Broth Lodge, leaves crisped
under my feet and an occasional car passed me as I quickly marched to the top
of the paved road leading to the old estate house. The 141m map spot height appears on the north-eastern
side of an intersection, visually the land to the south-west of this
intersection looked higher.
As I continued toward
where I thought the highest ground to be situated I watched a photographer
frame a shot of autumnal trees above their fallen leaves, I stopped and we
chatted, I looked through the viewfinder of his camera and the composition
looked stunning, my photo taken from the same position looks drab in
comparison. I explained what I hoped to
do and asked him where he thought the highest ground to be positioned, he
looked around and pointed toward the place where I had independently also
judged the summit of Wynnstay Park to be situated.
I placed the Trimble on
top of my rucksack and the long waiting game began. After about ten minutes the
Trimble’s accuracy level was struggling to make 0.35m, so I switched it off and
created a new file and set it up facing in a different direction but still aligned
over the high point. I then stood back
and waited………. and waited……….. and waited.
During this time I took
a number of photos of trees and a ‘Caution Squirrels Crossing’ sign. It took an age for the Trimble to achieve its
required 0.1m accuracy level before data should be logged, but once it had I
quickly pressed ‘Log’ and waited for the five minutes of data collection to be
complete.
This sign amused me during my long wait for the Trimble to achieve its 0.1m accuracy level before data should be logged |
The Trimble set-up position at Wynnstay Park |
By now the sun was low
on the horizon and once the Trimble was packed away I scampered off down the
road, past my car and on to a footpath that led over a field toward the first
of two bwlch surveys I wanted to complete.
This first potential bwlch position was in a grassed field with an
enclosed footpath next to it and allotments in front of it. As the Trimble gathered data I chatted with a
couple of people who were out walking their dogs, one kindly pointed me in the
right direction for easiest access toward the footpath near to where I wanted
to gather the second potential bwlch data set.
Gathering data at the first of two set up positions for the bwlch |
This second position was
in another grassed field with a graveled track adjacent to it and separated
from it by a large hedge. As the Trimble
gathered its 14th and last data set of the day I stood uphill of it
and peered down on the field and looked at the land as it continued its
downward progress from where the Trimble was quietly beeping away.
Gathering data at the second of two set up positions for the bwlch |
Once the Trimble was
packed away I followed the footpath from the graveled track uphill to the
field and my inward route back to my car.
It had been another good day visiting hills made out of mine spoil and
ones luxuriating themselves in country parks.
The paved road leading toward the summit of Wynnstay Park |
Survey Result:
Wynnstay Park
Summit Height: 141.2m (LIDAR, and confirmed as lower than Pentre Clawdd Gorse [SJ 31131 44252])
Summit Grid Reference: SJ 31001 42958 (LIDAR) (summit relocation)
Bwlch Height: 128.2m (LIDAR)
Bwlch Grid Reference: SJ 31418 43293 (LIDAR)
Drop: 13.0m (LIDAR)
Dominance: 9.22% (LIDAR)
Bwlch Height: 128.2m (LIDAR)
Bwlch Grid Reference: SJ 31418 43293 (LIDAR)
Drop: 13.0m (LIDAR)
Dominance: 9.22% (LIDAR)
Pentre Clawdd Gorse
Summit Height: 142.0m (converted to OSGM15, from subsequent Trimble GeoXH 6000 survey and confirmed as higher than Wynnstay Park [SJ 31001 42958])
Summit Grid Reference: SJ 31131 44252 (from subsequent Trimble GeoXH 6000 survey) (summit relocation confirmed)
Bwlch Height: 109.8m (LIDAR)
Bwlch Grid Reference: SJ 30789 44141 (LIDAR)
Drop: 32.2m (Trimble GeoXH 6000 summit and LIDAR bwlch) (100m Twmpau addition)
Dominance: 22.67% (Trimble GeoXH 6000 summit and LIDAR bwlch)
Dominance: 22.67% (Trimble GeoXH 6000 summit and LIDAR bwlch)
For the post detailing the summit survey of Pentre Clawdd Gorse
For further details please consult the Trimble survey spreadsheet click {here}
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