Tyn y Maes (SH 354 937)
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 Tyn y Maes (SH 354 937) |
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 |
The hill appeared in the original 30-99m Welsh P30 list on Geoff Crowder’s v-g.me website under the transposed name of Wylfa, with an accompanying note stating; Name from power station to the West.
Wylfa | 40m | SH355937 | 114 | 262 | Name from power station to the West |
During my early hill listing I thought it appropriate to either invent a name for a hill, or use a name that appeared near to the summit of the hill on Ordnance Survey maps of the day. My preference was to use farm names and put Pen, Bryn or Moel in front of them or as in this instance transpose the name of a near power station and use it for that of the hill. This is not a practice that I now advocate as with time and inclination place-name data can be improved either by asking local people or by examining historic documents, through this form of research an appropriate name for the hill can usually be found.
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: Tyn y Maes
Previously Listed Name: Wylfa
OS 1:50,000 map: 114
Summit Height: 40.7m (LIDAR)
Summit Grid Reference: SH 35484 93747 (LIDAR)
Bwlch Height: 15.3m (LIDAR)
Bwlch Grid Reference: SH 35494 93505 (LIDAR)
Drop: 25.3m (LIDAR)
Myrddyn Phillips (May
2021)
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