Showing posts with label Bryn Bras. Show all posts
Showing posts with label Bryn Bras. Show all posts

Friday, 30 April 2021

Mapping Mountains – Significant Name Changes – 100m Twmpau


Bryn Bras (SN 573 772) 

There has been a Significant Name Change to a hill that is listed in the 100m Twmpau, with the summit height, bwlch height and their locations, the drop and status of the hill derived from LIDAR analysis and a subsequent Trimble GeoXH 6000 survey conducted by Myrddyn Phillips. 

Bryn Bras (SN 573 772)

The criteria for the list that this name change applies to are:

100m Twmpau - Welsh hills at or above 100m and below 200m in height with 30m minimum drop, with an accompanying sub list entitled the 100m Sub-Twmpau with the criteria for this sub category being all Welsh hills at or above 100m and below 200m in height with 20m or more and below 30m of drop, with the word Twmpau being an acronym standing for thirty welsh metre prominences and upward. 

The 100m Twmpau by Myrddyn Phillips

The hill is adjoined to the Elenydd group of hills, which are situated in the central part of the Mid and West Wales Region (Region B, Sub-Region B2), and it is positioned with the coast to its west and a minor road to its immediate east with the A487 road farther to its east, and has the town of Aberystwyth towards the north north-east. 

When the original 100m height band of Welsh P30 hills were published on Geoff Crowder’s v-g.me website this hill was listed under the invented and transposed name of Pen Morfa Bychan, with an accompanying note stating; Name from buildings to the West.


Pen Morfa Bychan169mSN573772135213Name from buildings to the West

 

During my early hill listing I thought it appropriate to either invent a name for a hill, or use a name that appeared near to the summit of the hill on Ordnance Survey maps of the day.  My preference was to use farm names and put Pen, Bryn or Moel in front of them.  This is not a practice that I now advocate as with time and inclination place-name data can be improved either by asking local people or by examining historic documents, through this form of research an appropriate name for the hill can usually be found. 

Extract from the Ordnance Survey 1:25,000 Explorer map

As the summit of this hill comprises bounded land the details for it were examined on the Tithe map.  The term Tithe map is generally given to a map of a Welsh or English parish or township and which was prepared after the 1836 Tithe Commutation Act.  This act allowed tithes to be paid in cash rather than goods.  The Tithe maps gave names of owners and occupiers of land in each parish and importantly for place-name research they also included the name of enclosed land.  This enclosed land is usually based on a field system, however not every field is given a name, but many are and especially so in Wales. 

Extract from the Tithe map

The enclosed land where the summit of this hill is situated is given the number 104 on the Tithe map, this can be cross referenced against the apportionments; it is these apportionments that give the name of the owner or occupier of the land as well as the name of the land.  The land where the summit of this hill is situated is named as Bryn Bras in the apportionments, with the details on the Tithe map appearing in the parish of Llanychaearn and in the county named as Cardigan. 

Extract from the apportionments

Therefore, the name this hill is now listed by in the 100m Twmpau is Bryn Bras and this was derived from the Tithe map. 

 

The full details for the hill are: 

Group:  Elenydd 

Name:  Bryn Bras

Previously Listed Name:  Pen Morfa Bychan 

OS 1:50,000 map:  135

Summit Height:  169.8m (converted to OSGM15, Trimble GeoXH 6000) 

Summit Grid Reference:  SN 57323 77231 (Trimble GeoXH 6000) 

Bwlch Height:  127.7m (LIDAR) 

Bwlch Grid Reference:  SN 57194 76934 & SN 57199 76941 (LIDAR) 

Drop:  42.1m (Trimble GeoXH 6000 summit and LIDAR bwlch) 

 

Myrddyn Phillips (April 2021)

 

 

 

 

 

 

 

  

Friday, 22 January 2021

Mapping Mountains – Trimble Surveys – Elenydd

 

15.10.20  Bryn Bras (SN 573 772) 

Bryn Bras (SN 573 772)

This was the second of what proved to be nine hills visited during the day, eight of which are listed as P30s, with the odd one out being listed as a sub.  I was out on the hill with Charles Everett and we had just visited Castell (SN 585 789), which is a small heighted but wonderfully positioned hill overlooking the Afon Ystwyth and the coast to the north-west.  Our next hill on the days agenda is listed as Bryn Bras and is positioned south-westward of Castell and for the convenience of our bagging day it has a narrow lane that contours the hill’s upper part and which is to its east.  This lane helped our bagging agenda as it enabled a relatively quick, albeit leisurely ascent. 

The morning was glorious with unadulterated blue sky near the coast and with a bank of cloud inland telling us that we had picked our hills favourably for the day.  The whole area that we explored during the day reminded me of parts of Ireland with quiet lanes and gorse laden hills.  It had a gentle feeling to it, one that was unrushed and even though the shear nature of hill bagging sometimes dictates a rushed mentality, our leisurely pace to and up and from the hill to the next, seemed in tune with our surroundings. 

Having explored the access to this hill via Google Earth I thought an approach from the west was one that could be taken, however we found a parking place close to where a public footpath leaves a sharp bend in the lane and marches off toward Morfa Bychan caravan site.  This approach was quicker and aerial views showed that it was also easier as it avoided much of the gorse on parts of the hill. 

It’s always a challenge writing a report of a survey that only took a few minutes to walk up the hill, survey it and walk back down.  I often approach such tasks from one of description and feeling, rather than one of practicality where a single paragraph would suffice.  This could be thought of as over-complicating matters, but I find my approach takes me back to the hill and the feelings I experienced when there. 

As we wandered back down the lane to a stile, Charles led the way, as he also did so across the field with me heading upward toward a fence.  Charles called across for me to join him as another stile crossed the fence and gave us access to the upper hill. 

Early morning cows were grazing the eastern and southern parts of the upper hill, their black and white coats shining against the morning sunshine.  The ones beyond the summit on the southern part of the hill slowly munched their way toward us as we reached the hill’s high point.  The summit gave wonderful coastal views with the blue of the sea screaming back at us, temptingly and alluringly, an almost never ending horizon opened to the Llŷn in the north and the hills of Pembrokeshire to the south.  Charles celebrated in the only manner that Charles can! 

And why not as it was a stunningly beautiful day!

Charles waiting patiently for the Trimble to gather data

Within a few minutes we had assessed the lay of land and chosen the placement for the Trimble.  Prior to visiting this hill I had analysed its numerical details via LIDAR, and even though this can help with zeroing in to the summit of a hill, in many instances it is only used afterward as a confirmation as many summits, even on lesser heighted hills are easy to pinpoint by just the use of one’s eye, and Bryn Bras was such an example. 

LIDAR image of Bryn Bras

During data gathering we both stood back from the equipment and waited for the allotted data to be collected and stored.  I also kept an eye on the cows that were slowly making their way upward and toward our position. 

Gathering data at the summit of Bryn Bras

Once data were gathered and stored I closed the equipment down, took a few photographs, packed it away and re-joined Charles as we headed down.  On the way we encountered more cows with one or two slowly approaching us, ever inquisitive even if rather timid.  Charles stayed with them as I wandered toward the stile leading us back to the lane, and after gentle encouragement one of the cows slowly approached Charles sticking its nose out for a stroke. 

Our companions near the summit

Once back at the car we headed further south for about 2km, on the same narrow lane to our third hill of the day; Banc (SN 568 757). 

 

Survey Result: 

 

Bryn Bras (significant name change)  

Summit Height:  169.8m (converted to OSGM15, Trimble GeoXH 6000)

Summit Grid Reference:  SN 57323 77231 (Trimble GeoXH 6000)

Bwlch Height:  127.7m (LIDAR)

Bwlch Grid Reference:  SN 57194 76934 and SN 57199 76941 (LIDAR)

Drop:  42.1m (Trimble GeoXH 6000 summit and LIDAR bwlch)

Dominance:  24.80% (Trimble GeoXH 6000 summit and LIDAR bwlch)

 

 

For further details please consult the Trimble Survey Spreadsheet

 

Tuesday, 17 November 2020

Mapping Mountains – Hill Reclassifications – Y Trichant – The 300m Hills of Wales


Bryn Bras (SN 742 796) – Sub-Trichant reclassified to Trichant

There has been confirmation of a reclassification to the list of Y Trichant – The 300m Hills of Wales, with the summit height, bwlch height and their locations, the drop and status of the hill confirmed LIDAR analysis conducted by Myrddyn Phillips.

LIDAR image of Bryn Bras (SN 742 796)

The criteria for the list that this reclassification applies to are:

Y Trichant – The 300m Hills of Wales – Welsh hills at or above 300m and below 400m in height that have 30m minimum drop, with an accompanying sub list entitled the Sub-Trichant with the criteria for this sub category being all Welsh hills at or above 300m and below 400m in height with 20m or more and below 30m of drop.  The list is authored by Myrddyn Phillips, with the Introduction to the list and the renaming of it appearing on Mapping Mountains on the 13th May 2017.

Y Trichant - The 300m Hills of Wales by Myrddyn Phillips

The name the hill is listed by is Bryn Bras, and it is adjoined to the Pumlumon group of hills, which are situated in the north-western part of Mid and West Wales (Region B, Sub-Region B2), and it is positioned with a minor road to its immediate west and also the A44 road to its north and the A4120 road to its east, and has the village of Ponterwyd towards the north north-east.

When the original 300m height band of Welsh P30 hills was published on Geoff Crowder’s v-g.me website this hill was included in the Hills to be surveyed sub list, as it was considered not to meet the criteria then used for the accompanying main P30 list, and was listed with a 372m summit height based on the spot height that appears on the Ordnance Survey 1:50,000 Landranger map.

Extract from the Ordnance Survey 1:50,000 Landranger map

When the sub list was standardised, and interpolated heights and drop values also included the details for this hill were re-evaluated and it was listed with an estimated c 30m of drop, based on the 372m summit spot height and an estimated c 342m bwlch height based on interpolation of 10m contouring between 340m – 350m that appear on the Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map.

Extract from the Ordnance Survey 1:25,000 Explorer map

The details for this hill were re-assessed when the Ordnance Survey Vector Map Local hosted on the Geograph website and which was entitled the Interactive Coverage Map became available online.  This mapping had many spot heights not on other publicly available maps and showed a 371m spot height for the summit of this hill, and when coupled with the re-interpolated bwlch height of c 371m, its listed drop remained at an estimated c 30m.

However, it was not until LIDAR became available that the details for this hill could be accurately re-assessed.  The LIDAR (Light Detection & Ranging) technique produced highly accurate height data that is now freely available for much of England and Wales. 

Therefore, the confirmation of the reclassification of this hill from Sub-Trichant status is due to LIDAR analysis, resulting in a 371.4m summit height and a 339.9m bwlch height, with these values giving this hill 31.5m of drop, which is sufficient for it to be classified as a Trichant.


The full details for the hill are:

Group:  Pumlumon

Name:  Bryn Bras

OS 1:50,000 map:  135, 147

Summit Height:  371.4m (LIDAR)

Summit Grid Reference:  SN 74245 79628 (LIDAR)

Bwlch Height:  339.9m (LIDAR)

Bwlch Grid Reference:  SN 74162 79597 (LIDAR)

Drop:  31.5m (LIDAR)


Myrddyn Phillips (November 2020)