Home Geology Tryfan Mountain’s height to be re-measured

Tryfan Mountain’s height to be re-measured

UK: Tryfan, a mountain peak in Snowdonia, Wales is set to be re-measured and may lose its status as an elite summit in Wales. Modern technology will check whether Tryfan in the Ogwen Valley is actually 915m, or 3,002ft, as it currently appears on the map. The mountain is listed as one of the elite group of 14 peaks in Wales that are more than 3,000ft high. Mountain heights are calculated using aerial photography, which provides a height accurate to around 4 metres. The GPS equipment now being used to measure Tryfan is accurate to just a few centimetres.

Controversy regarding the peak’s height is likely to be settled in June when three amateur mountain surveyors haul professional GPS equipment and computers to the summit. John Barnard, Graham Jackson and Myrddyn Phillips have a good track record in surveying mountains and their measurements are accepted by Ordnance Survey, the national mapping agency.

Myrddyn said, “We are interested in whether or not it is indeed above the 3,000-foot mark. It would certainly make the challenge of visiting every Welsh 3,000‑foot summit in a single journey easier if it wasn’t!” Mark Greaves, Ordnance Survey Geodetics Analyst, has been working closely with the expedition. He said, “After completion of Myrddyn and the team’s survey work we will verify the accuracy of their data and, providing it meets our standards – which I’m sure it will, the revision will be made to the relevant maps and mapping data.”

Ordnance Survey makes around 5,000 changes a day to the digital master map of Britain used by businesses and the Government. Mark added, “Most of those changes take place in urban areas, which is where Ordnance Survey has to concentrate our resources.”

Source: Ordnance Survey, BBC News