Standing Stone Hill (SD 950 303) – Double Sub-Four addition
There has been an addition to the listing of the The Fours – The 400m Hills of England, with
the summit height, col height and their locations, the drop and status of the
hill derived from detail on contemporary maps produced from Ordnance Survey
data.
This was initiated by Joe Nuttall who produced a summit analysis programme that used LIDAR with an alternative height map (DEM) allowing identification of summits and cols and thereby drops. The resulting spreadsheet that Joe produced
contains over 29600 hills.
This spreadsheet is being evaluated by a number of
people, including Ronnie Bowron, who passed the details of this hill for evaluation.
The criteria for the list that this addition
applies to are:
The Fours – The 400m Hills of England.
English hills at or above 400m and below 500m in height that have 30m
minimum drop, accompanying the main listing of The Fours are three categories
of sub hills, with this hill being added to the Double Sub-Four category, the
criteria for which are all English hills at or above 390m and below 400m in
height that have 20m or more and below 30m of drop. The list is co-authored by Myrddyn Phillips and Aled Williams and the 2nd edition of the booklet containing this list was published by Mapping Mountains Publications on the 24th April 2018.
 |
| The Fours - The 400m Hills of England by Myrddyn Phillips and Aled Williams |
The name the hill is listed by is Standing Stone Hill, and it is adjoined to the Pendle group
of hills, which are situated in the
Pennines of northern England (Region 36: The Southern Pennines), and it is
positioned with minor roads to its north-east and south, and farther afield it has
the A646 road to its south-west and the A6033 road to its east, and has the
town of Hebden Bridge towards the south-east.
When the 2nd edition of the The Fours – The 400m Hills of England
was published by Mapping Mountains Publications in April 2018, this hill was
not included but was provisionally listed with 20m of drop, based on the 398m
summit spot height adjoined to a triangulation pillar and the 378m col spot
height that appear on the Ordnance Survey 1:25,000 Explorer map.
 |
| Extract from the Ordnance Survey 1:25,000 Explorer map |
These details have now been re-assessed against
the mapping on the OS Maps website. This
is the replacement for OS Get-a-map and has contours at 5m intervals which are
proving consistently more accurate compared to the 5m contours that sometimes
appear on the Ordnance Survey 1:25,000 Explorer map and used to appear on the
online Vector Map Local. This mapping is
digitally updated and the position of the 378m spot height has been checked
against the col contours which are between 375m – 380m, resulting in an
estimated c 377m col height. This when coupled with its summit relocation to SD 95042 30320 and an estimated summit height of c 399m due to an Abney level survey conducted by Ronnie Bowron, gives this hill an estimated c 22m of drop.
 |
| Extract from the OS Maps website |
Therefore, the addition of Standing Stone Hill to
Double Sub-Four status is due to re-assessment of contemporary mapping produced
from Ordnance Survey data and an on-site Abney level survey, resulting in an estimated c 399m summit height and a c 377m col
height, with these values giving this hill an estimated c 22m of drop, which is sufficient
for Double Sub-Four status.
The full details for the hill are:
Group: Pendle
Name: Standing Stone
Hill
OS 1:50,000 map: 103
Summit Height: c 399m
(relative to triangulation pillar)
Summit Grid Reference:
SD 95042 30320 (hand-held GPS)
Col Height: c 377m
(interpolation)
Col Grid Reference: SD
94516 30295 (interpolation)
Drop: c 22m
(relative to triangulation pillar summit and interpolated col)
For the additions, deletions and reclassifications to The Fours reported on Mapping Mountains
since the December 2013 publication of the list by Europeaklist please consult
the following Change Registers:
Our thanks to Joe Nuttall and Ronnie Bowron for bringing the
details of this hill to our attention.
Myrddyn Phillips and Aled Williams (August 2020)
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