View Edge (SO 422 809)
There has been a Significant Height Revision to a
hill that is listed in the Tumps,
which was initiated by a survey with
the Trimble GeoXH 6000 which took place on the 4th May 2018 in the
company of Bob Kerr, with clear and calm conditions on the hill.
The name of the hill is View Edge and it is
situated in Region 38 the Welsh Borders and in Section 38A Shropshire. The hill is positioned between a number of
roads with the B 4367 to its west, the B 4368 to its north and the A 49 to its east,
and has the small town of Craven Arms towards its north north-east.
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| View Edge (SO 422 809) |
As the hill is not a part of designated open
access land permission to visit should be sought, for those wishing to do so a
public footpath from the south accesses the wood close to where the summit is
situated.
Prior to the survey with the Trimble GeoXH 6000
this hill was listed with a 321m summit height which is based on the spot
height that appears on the Ordnance Survey 1:25,000 Explorer map. Otherwise I have found no other summit height
on any scaled Ordnance Survey map, with only the Six-Inch map published in 1903
giving a 1045ft (318.5m) height to the east of the summit.
 |
| Extract from the Ordnance Survey 1:25,000 Explorer map |
 |
| Extract from the Ordnance Survey Six-Inch map published in 1903 |
The summit of the hill is positioned in mixed
woodland which is not ideal for satellite coverage, and because of this a 15
minute data set was taken. However, once
data were processed the standard deviation was 1.0m and the estimated
accuracies were 0.5 – 1m: 25.65%.
The 324.1m (converted to OSGM15) summit height
produced by the Trimble GeoXH 6000 is 3.1m higher than the previously listed
height of 321m, which was based on the summit spot height on contemporary
Ordnance Survey 1:25,000 maps, and therefore this new height comes within the
parameters of the Significant Height Revisions used within this page heading,
these parameters are:
The term Significant Height Revisions applies to
any listed hill whose Ordnance Survey or Harvey map summit spot height has a 2m
or more discrepancy when compared to the survey result produced by the Trimble
GeoXH 6000 or analysis of data produced via LIDAR, also included are hills whose
summit map data is missing an uppermost ring contour when compared to the data
produced by the Trimble or by LIDAR, and also hill’s that do not possess a
summit spot height and whose estimated summit height has a 2m or more
discrepancy when compared to data produced either by the Trimble or by
LIDAR. As heights on different scaled
Ordnance Survey maps are not consistent the height given on the 1:25,000
Explorer map is being prioritised in favour of the 1:50,000 Landranger map for
detailing these revisions.
The summit of this hill is easily identified and
consists of ground near the base of a tree, which is approximately 20 metres
from a fence and an adjacent closely cropped grazing field. On the day that the survey took place the
wood was resplendent with bluebells.
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| The Trimble GeoXH 6000 gathering data at the summit of View Edge |
Therefore this hill’s new summit height is 324.1m
(converted to OSGM15), which is 3.1m higher than its previously listed height
which was derived from the 321m summit spot height on the Ordnance Survey
1:25,000 Explorer map.
The full details for the hill are:
Group: Beacon Hill
Summit Height (New Height):
324.1m (converted to OSGM15)
Name: View Edge
OS 1:50,000 map: 137
Summit Grid Reference:
SO 42278 80988
Drop: c 170m
Myrddyn Phillips (June 2018)
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