Tŷ Newydd (SH 307 810)
There has been a Significant Name Change to a hill that is listed in the 30-99m Twmpau, 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 Tŷ Newydd (SH 307 810) |
30-99m
Twmpau – Welsh hills at or above 30m
and below 100m in height that have 30m minimum drop, with an accompanying sub list entitled the 30-99m
Sub-Twmpau with the criteria for this sub category being all Welsh hills at or
above 30m and below 100m 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 30-99m Twmpau by Myrddyn Phillips |
When the original 30-99m height band of Welsh P30 hills were published on Geoff Crowder’s v-g.me website this hill was not included in the Hills to be surveyed sub list, as it was considered not to meet the criteria then used for this sub category.
After 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 under the point (Pt. 35m) notation with an estimated c 27m of drop, based on the 35m summit spot height that appeared on the Ordnance Survey Vector Map Local hosted on the Geograph website and which was entitled the Interactive Coverage Map, and an estimated c 8m bwlch height based on interpolation of 5m contouring between 5m – 10m that appears on the Ordnance Survey 1:25,000 Explorer map.
Extract from the Ordnance Survey 1:25,000 Explorer map |
Extract from the Tithe map |
Extract from the apportionments |
The full details for the hill are:
Group: Ynys Môn
Name: Tŷ Newydd
Previously Listed Name: Pt. 35m
OS 1:50,000 map: 114
Summit Height: 35.65m (LIDAR)
Summit Grid Reference: SH 30777 81080 (LIDAR)
Bwlch Height: 6.3m (LIDAR)
Bwlch Grid Reference: SH 31999 81570 (LIDAR)
Drop: 29.3m (LIDAR)
Myrddyn Phillips (August
2021)
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