Mapping Mountains – Trimble Surveys – Mynydd Epynt

 

02.11.24  Pt. 428.9m (SO 035 449) 

Pt. 428.9m (SO 035 449)

Lack of daylight hours dictated that this was our last hill of the day.  It was 3.20pm when we set off from the narrow road that bisects this hill from its higher neighbour to the north.

At this time of year the hill consists of grass and dulled autumnal bracket.  Green tracks lead across the hill, bisecting at points, giving both farmers and hill walkers ease of passage.  The underfoot conditions and the rolling nature of the land hereabouts give a semblance of gentleness to the hill.  It was an ideal choice for our last hill of the day and would give Charles a new P30.  I had previously visited the hill in 2008 when including it in a good lengthy circuit with its higher northerly neighbour. 

Convenient place to park a car

Leaving the car I followed Charles on a green track that contoured its way around an intermediary bump.  Although there was no breeze, a slight chilled feeling pervaded the hill as late afternoon gently turned to dusk.  This only added to the quality of being out in such land. 

Heading for the hill

Wet surrounds indicated the low points of the track as it continued around a second intermediary bump, which again we bi-passed with the track contouring its way around.  From here it was only a short distance to the high point of the hill which reared up in front of us as an elongated flattish broad ridge.

Prior to visiting I had LIDAR’ed the hill and although the ten figure summit grid reference proved not to be needed, as I eventually resorted to sighting by eye, I nevertheless initially used the Trimble as a hand-held device to zero in on what LIDAR gives as the summit position. 

LIDAR image of Pt. 428.9m (SO 035 449)

However, the summit consists of numerous small bumps, a number of which vied for the high point.  It was now that I dispensed with the grid reference produced by LIDAR and sighted across the top from a number of directions before choosing what was judged as the high point.  The Trimble was soon set up gathering data. 

Charles heading for the summit

During data collection I stood away from the equipment writing all necessary detail in my surveying notebook.  Once five minutes of data were gathered and stored I walked back to the equipment, turned it off and took a few photos.  Before packing it away we were joined by an enthusiastic Tess the dog and her human companion, who unfortunately neither of us asked her name.  I had spotted her a while earlier as she ran across the hill, she was now heading toward us and asked what we were doing, having thought we may be studying ferns. 

Gathering data at the summit of Pt. 428.9m (SO 035 449)

It was lovely meeting her; she lived on a small holding near by and used this and its adjacent hill to run on.  During the conversation Tess ran this way and that, a never ending four legged bundle of enthusiastic energy jumping up to greet us whilst barking her happiness. 

At the summit

As the two of them ran off down the hill we also headed down toward the near green track, and then retraced our inward route.  The walk had taken just over an hour and by the time we arrived back at the car, dusk was setting. 

 

Survey Result:           

 

Pt. 428.9m (significant name change)  

Summit Height:  428.9m (converted to OSGM15, Trimble GeoXH 6000)

Summit Grid Reference:  SO 03592 44968 (Trimble GeoXH 6000)

Col Height:  396.7m (LIDAR)

Col Grid Reference:  SO 03648 45409 & SO 03664 45405 (LIDAR)

Drop:  32.1m (Trimble GeoXH 6000 summit and LIDAR bwlch)

Dominance:  7.49% (Trimble GeoXH 6000 summit and LIDAR bwlch)  

 

 

For further details please consult the Trimble Survey Spreadsheet