Mapping Mountains – Trimble Surveys – Mynydd Hiraethog

 

26.02.22  Gogarth (SH 767 833, previously Trimbled) 

Gogarth is one of the Welsh terms for what many refer to as the Great Orme.  This is the up thrust of land that forms a limestone promontory overlooking the salubrious domain of Llandudno to its south-east and the environs of the north Wales coast in all other directions. 

Gogarth (SH 767 833)

The hill is not substantive in height, but is in its dominance, as it is connected to the mainland by a bwlch which LIDAR gives as 5.4m in height.  The area of the bwlch has undergone substantial terra forming; therefore the natural height could be lower. 

The summit of Gogarth was Trimbled on the 31^st December 2013 and was the sixteen P30 I had surveyed with this equipment.  The day was particularly chilly when the summit was surveyed, albeit with a spotless blue sky and to my knowledge this was the first time I had visited this hill, unless I had a prior visit with my parents when I was very young. 

Having Trimbled its summit and LIDARed its bwlch, I had no plan on re-visiting.  However, as I was at my brother’s for the weekend and with a good forecast for Saturday, albeit still with a definite chilled feel to the weather, we headed out for a road trip and found ourselves on the A55 heading east toward Llandudno.  Once the prospect of visiting the summit of Gogarth was mentioned it was all too easy to head its way and join the one way toll road heading around its eastern periphery, which gives access up a zig-zagged steep road to the complex of buildings surrounding its summit. 

LIDAR bwlch image of Gogarth (SH 767 833)

This visit was so unplanned I didn’t even bring my camera, so the photos accompanying this post are from previous walks.  The toll road costs £3.50 if memory serves me right (I grabbed a note and waited for change).  The road then heads around the eastern side of the hill with views out and across the sea, a left hand two way road then heads up.  We took this and parked at the top. From here it is only a short walk to the triangulation pillar which adorns the summit, with the high point of the hill a nobbled rock close to the trig pillar. 

The Trimble GeoXH 6000 gathering data at the summit of Gogarth

It was gusty on top with a multitude of people appearing from all directions.  It seemed everyone was here enjoying the blue skied sunny early afternoon.  We left the summit after five minutes and wandered back to the car before continuing down the steep road and the one way system now around the northern and westerly part of the hill. 

It was an unexpected visit and one that encouraged me to check LIDAR for the bwlch height and position of this hill.  Gogarth is a fine hill and one whose convenient road makes for an easy ascent if so inclined. 

 

Survey Result: 

 

Gogarth (significant name change)

Summit Height:  207.1m (converted to OSGM15, from previous Trimble GeoXH 6000)

Summit Grid Reference:  SH 76749 83334 (from previous Trimble GeoXH 6000)

Bwlch Height:  5.4m (LIDAR)

Bwlch Grid Reference:  SH 82244 78704 (LIDAR)

Drop:  201.7m (Trimble GeoXH 6000 summit and LIDAR bwlch)

Dominance:  97.41% (Trimble GeoXH 6000 summit and LIDAR bwlch)

 

 

For details on the summit survey of Gogarth

For further details please consult the Trimble Survey Spreadsheet