Melin Llanddyfnan (SH 483 786)
There has been a Significant Name Change to a hill that is listed in The Welsh P15s, with the summit height, bwlch height and their locations, the drop and status of the hill derived from LIDAR analysis conducted by Myrddyn Phillips.
LIDAR image of Ynys Llanddyfnan (SH 483 786) |
The Welsh
P15s – Welsh hills with 15m
minimum drop, irrespective of their height, with an accompanying sub list entitled the Welsh Sub-P15s,
with the criteria for this sub category being all Welsh hills with 14m or more
and below 15m of drop. The list is authored by Myrddyn Phillips, with the
Introduction to the list appearing on Mapping Mountains on the 10th
May 2019.
The Welsh P15s by Myrddyn Phillips |
When the listing that became known as The Welsh P15s was being compiled, this hill was listed under the point (Pt. c 86m) notation with an estimated c 13m of drop, based on an estimated c 86m summit height and an estimated c 73m bwlch height, with both heights based on interpolation of 5m contouring that appear on the Ordnance Survey 1:25,000 Explorer map.
Extract from the Ordnance Survey 1:25,000 Explorer map |
Extract from the Ordnance Survey Six-Inch map hosted as a part of the Tithe map |
The full details for the hill are:
Group: Ynys Môn
Name: Melin Llanddyfnan
Previously Listed Name: Pt. c 86m
OS 1:50,000 map: 114,
115
Summit Height: 87.2m (LIDAR)
Summit Grid Reference: SH 48371 78617 (LIDAR)
Bwlch Height: 72.2m (LIDAR)
Bwlch Grid Reference: SH 48391 79121 (LIDAR)
Drop: 14.9m (LIDAR)
Myrddyn Phillips
(October 2021)
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