Change
Register
The Hewitts
of England
In June 1997 TACit Tables published a booklet entitled The Hewitts and Marilyns of England,
with a sister booklet to The Hewitts and
Marilyns of Wales being published in February of the same year. These booklets are two in a series of many
that the list author; Alan Dawson, compiled and had published by TACit Tables
for P30 hills throughout Britain that are 2,000ft (609.6m) and above in height.
The Hewitts (an acronym for Hill in England, Wales or Ireland over Two Thousand feet high) are all hills in
these countries at or above 2,000ft (609.6m) in height that have a minimum drop
of 30m, accompanying the main list are two sub category’s entitled SubHewitts, with the two sets
of criteria being any hill at or above 600m and below 2000ft (609.6m) in height
that has a minimum drop of 30m and any hill at or above 2000ft (609.6m) in
height with 20m or more and below 30m of drop.
The listing
originated as the Sweats (an acronym for Summits
in Wales and England Above Two-thousand FEET) and appeared as The
Absolute Summits of England and Wales in The
Relative Hills of Britain book published by Cicerone Press in 1992, its
author; Alan Dawson then separated the component parts and renamed them the
Hewitts and published each in the TACit Tables booklets as detailed above.
For those people who have completed an ascent of each listed
hill they would have visited all summits in England at or above 2,000ft
(609.6m) in height that have a minimum prominence of 30m. These hills take in the majority of upland
areas in England from the wilderness of the Cheviot in the north, to the openness
of the Pennines and the compact beauty of the Lake District, to the rock tors
of Dartmoor in the south, each and every hill can leave memories that refresh
the soul and body, and for many it is the TACit Table booklet that has taken
them on a journey through some of the most beautiful landscape that Britain has
to offer.
When the booklet was first published England was listed with
178 hills. Since these early days the
influx of independent surveyors, the availability of LIDAR and the diligence of
map study have reclassified a number of hills to Hewitt status. But what hills have now entered this list and
who was responsible for their inclusion?
It seems fitting to list these reclassified English Hewitts
as there have been three alterations to this list within a two year period
between September 2016 and September 2018 with two hills being promoted and one
deleted from the list, with their overall total now being 180, an increase of two
since they were listed in 1997. These
reclassifications are just the latest in a line that stretches back to September
2006 when the first of many surveys that reclassified a hill to English Hewitt
status was conducted, and it seems appropriate to list these with their
respective details, now that there are three hills that have recently changed
classification. However, there have also
been two other promotions over the years, and these are also listed with their
respective details.
The Change Register to The Hewitts of England appears below
in receding order under the hill name used by Alan Dawson:
Change
Register
The
Hewitts of England
Carl Side 746.8m at NY 25494 28086
%20-%20LIDAR%20hill%203.jpg) |
| LIDAR image of Carl Side (NY 254 280) |
Prior to this hill’s reclassification to Subhewitt status it
was listed as a Hewitt with 30m of drop, based on a 746m summit height and a
716m col height. The details for this hill
were subsequently analysed via LIDAR which was prompted by the result produced
by Joe
Nuttall’s summit analysis programme which uses LIDAR to ascertain heights and
drops of hills. LIDAR analysis resulted in a 746.8m summit
height and a 718.6m col height, with these values giving this hill 28.3m of
drop. The reclassification of Carl Side
to Subhewitt status was augmented by Alan Dawson in to the Hewitts list on the
11th January 2021. English
Hewitt total decreases by one and confirmed as 180.
Combe Head 735.3m at NY 24972 10939
%20-%20LIDAR%20hill%201.jpg) |
| LIDAR image of Combe Head (NY 249 109) |
This hill is included in the listing of English Hewitts based on detail produced from Joe Nuttall’s summit analysis programme which uses LIDAR to ascertain heights and drops of hills. Prior to this hill’s inclusion it was listed with 28m of drop, based on a 735m summit height and a 707m col height. The details for this hill were subsequently analysed via LIDAR, resulting in a 735.3m summit height and a 704.1m col height, with these values giving this hill 31.2m of drop. The addition of Combe Head to Hewitt status was augmented by Alan Dawson in to the Hewitts list on the 11th January 2021. English Hewitt total increases by one and confirmed as 181.
Green
Side 794.1m at NY 35270 18750
%20-%20LIDAR%20summit%202.jpg) |
| LIDAR image of Green Side (NY 352 187) |
This is the second hill to be reclassified within the Hewitts, and the first to lose its Hewitt status solely based on LIDAR analysis. Prior to this hill’s reclassification it was listed with 30m of drop, based on a 795m summit height and a 765m col height. The details for this hill were subsequently analysed via LIDAR by Alan Dawson, resulting in a 794.1m summit height and a 765.2m col height, with these values giving this hill 28.9m of drop. The reclassification of Green Side from Hewitt status was augmented by Alan Dawson in to the Hewitts list in September 2018. English Hewitt total decreases by one and confirmed as 180.
Striding Edge 862.9m at NY 35061 14922
%20-%20LIDAR%20summit%202.jpg) |
| LIDAR image of Striding Edge (NY 350 149) |
Prior to this hill’s reclassification to Hewitt status it was listed with an estimated c 28m of drop, based on an 863m summit height and an 835m col height. The details for this hill were subsequently analysed via LIDAR by Alan Dawson, resulting in an 862.9m summit height and an 831.6m col height, with these values giving this hill 31.2m of drop, and it became the first hill to be reclassified within the Hewitts listing solely based on LIDAR analysis. The reclassification of Striding Edge to Hewitt status was augmented by Alan Dawson in to the Hewitts list in September 2018. English Hewitt total increases by one and confirmed as 181.
Calf Top 609.61m at SD 66450 85624
 |
| Calf Top from the summit of Castle Knott |
This hill was surveyed by John Barnard, Graham Jackson and Myrddyn
Phillips using a Leica 530, firstly on the 15th April 2010 when a
two hour summit data set was gathered, and secondly on the 20th May
2010 when a four hour summit data set was gathered. Both data sets were subsequently processed by
Ordnance Survey who confirmed that this hill was 609.58m high and therefore
just 2cm under 2,000ft (609.6m) in height.
However, six years later the Ordnance Survey produced their new geoid
model; OSGM15, resulting in all known accurate heights throughout England and
also Wales increasing by 2cm – 4cm, this resulted in Calf Top increasing in
known height to all of 6mm over 609.6m (2,000ft). The reclassification of Calf Top to Hewitt status was
accepted by Alan Dawson and augmented in to the Hewitts list in September 2016,
with
a retrospective Hill Reclassifications post being published on Mapping
Mountains. English Hewitt total increases
by one and confirmed as 180.
Thack
Moor 609.65m at NY 61166 46278
 |
| Thack Moor |
This hill was surveyed by John Barnard, Graham Jackson and Myrddyn
Phillips using a Leica 530 and Leica GS15, firstly on the 22nd
August 2012 when a two hour summit data set was gathered, and secondly on the 3rd
March 2013 when a four hour summit data set was gathered. Both data sets were subsequently processed by
Ordnance Survey who confirmed that this hill is 609.65m high and therefore over
2,000ft (609.6m) in height. The reclassification of Thack
Moor to Hewitt status was accepted by Alan Dawson and augmented in to the
Hewitts list in April 2013, with a retrospective Hill Reclassifications
post being published on Mapping Mountains. English Hewitt
total increases by one and confirmed as 179.
Birks Fell 610.4m at SD 91879 76371
 |
| LIDAR image of Birks Fell (SD 918 763) |
This hill had been proposed for inclusion as a Hewitt by several people, most notably John Barnard and Graham Jackson who on the 3rd June 2006 used an automatic level in calculating the height of this hill. The Ordnance Survey subsequently confirmed its height and the reclassification of Birks Fell to Hewitt status was accepted by Alan Dawson and augmented in to the Hewitts list in September 2006. The hill was subsequently analysed via LIDAR by Myrddyn Phillips resulting in a 610.3m summit height and a 452.2m col height, with these values giving this hill 158.1m of drop with the 610.4m optical survey result preferred by the author. English Hewitt total increases by one and confirmed as 178.
Black Mountain 703.7m at SO 25520 35383
 |
| Black Mountain is now listed as just a Welsh Hewitt |
When The Hewitts and
Marilyns of England booklet was published this hill was included in both
the English and Welsh Hewitt list as its summit was considered to be positioned
on the border between each country. This
dual listing status was reassessed by Alan Dawson and its Welsh Hewitt listing
retained and its English Hewitt listing relinquished when the Update to The Relative Hills of Britain
was published in April 2006, with an accompanying note stating; Black Mountain is on the border but counted
in Wales. The hill was subsequently
surveyed on the 28th September 2017 with a repeat summit survey
taking place on the 12th July 2018 by Myrddyn Phillips using a
Trimble GeoXH 6000 to determine the summit height and its position relating to
the border between England and Wales, with assistance from Mark Trengove on the
second survey. Subsequent consultation
with Ordnance Survey and the Boundary Commission for Wales resulted in confirmation
that the border between England and Wales as given on the Ordnance Survey
MasterMap is positioned 12 metres east from the grid coordinates for the summit
of this hill, and even though evidence supports the border follows the
watershed the summit for now is considered to be positioned in Wales. English Hewitt total decreases
by one and confirmed as 177.
1997
(June) - TACit Tables publishes The
Hewitts and Marilyns of England.
English Hewitt total confirmed as 178.
No comments:
Post a Comment