Change
Register
The
500-Metre Tops of Ireland
The
500-Metre Tops of Ireland are the Irish hills at or above 500m and
below 609.6m (2,000ft) in height that have a minimum drop of 30m. The list is co-authored by Michael Dewey and
Myrddyn Phillips with each having produced a version of the list independent of
the other. Michael’s list originated in 1998
and comprised 186 hills, whilst Myrddyn’s list originated in 2000 and comprised
191 hills with a further 29 hills listed in a sub list entitled ‘Hills that
need on the spot surveying with the prospect of being future additions’, this
sub list forms the basis of the 500m Subs
that now accompanies the main P30 list.
The list produced by Myrddyn was sent to a number of people
including Michael Dewey and the Mountaineering Council of Ireland (now named
Mountaineering Ireland). Having produced
versions of the same list the two authors combined each and decided to produce
one co-authored list. Data were
re-evaluated and the updated co-authored list was sent to the Mountaineering
Council of Ireland and later formed the lower height band of the list that
appeared on the fledging MountainViews website in 2002, this list was later
named the Arderins in 2009, with the higher height band of this list using data
from the late Joss Lynam’s 600m Irish list.
The 500-Metre Tops of Ireland listing was next fully re-evaluated with assistance from Jim Bloomer prior to it being published on the Hill Bagging website on 1st June 2011, and it was then published in the downloadable Access and Excel versions (v12.0) of the Database of British and Irish Hills (DoBIH) on 27th November 2011.
Although the criteria has remained the same the list has changed greatly since its first publication with the advent of independent surveyors enabling greater accuracy for numerical data, and the meticulous research conducted by Paul Tempan and incorporated by MountainViews, the listing also now incorporates three Sub categories, the aforementioned 500m Subs, the 490m Subs and the 490m Double Subs.
The 500-Metre Tops of Ireland listing was next fully re-evaluated with assistance from Jim Bloomer prior to it being published on the Hill Bagging website on 1st June 2011, and it was then published in the downloadable Access and Excel versions (v12.0) of the Database of British and Irish Hills (DoBIH) on 27th November 2011.
Although the criteria has remained the same the list has changed greatly since its first publication with the advent of independent surveyors enabling greater accuracy for numerical data, and the meticulous research conducted by Paul Tempan and incorporated by MountainViews, the listing also now incorporates three Sub categories, the aforementioned 500m Subs, the 490m Subs and the 490m Double Subs.
It seems fitting that the list of The 500-Metre Tops of Ireland should now benefit from a detailed
Change Register, and although the majority of updates to this list took place when
the two versions were originally combined in 2000, it is prudent for this
Change Register to initially detail the changes to the list since the 2011
publication by the Hill Bagging website.
The Change Register to The
500-Metre Tops of Ireland appears below with the reclassifications to the
main P30 list being detailed chronologically in receding order.
Change
Register
The
500-Metre Tops of Ireland
Corcóg 611.1m at L 95262 49137
The details of this hill’s deletion from The 500-Metre Tops of Ireland list and
its reclassification to The Hewitts of
Ireland list was announced on Mapping Mountains on the 21.07.20, with a
subsequent Hill Reclassifications post published on Mapping Mountains on the 09.12.20. Prior to this the hill was
listed with a 609m summit height based on the spot height that appears on the
Ordnance Survey of Ireland 1:50,000 Discovery map 45. Its deletion is due to a survey conducted by
Bluesky resulting in a 611.1m summit height.
The 500-Metre Tops of Ireland
total decreases by one and confirmed as 199.
Common
Mountin 499.7m at G 70918 85943
 |
| At the summit of Common MOuntain (G 709 859) |
The details of this hill’s reclassification from the The 500-Metre Tops of Ireland list to
the The 400-Metre Tops of Ireland
list was announced on Mapping Mountains in a Hill Reclassifications post on the
16.05.20, and is due to a Trimble GeoXH 6000 survey conducted by Michael
Critchley on the 13.11.19, resulting in a 499.7m summit height. The
500-Metre Tops of Ireland total decreases by one and confirmed as 200.
Knocknaveacal North Top 509.1m at V 74438 56269
The first hill to be reclassified from the main P30 list to
the 500m Subs list, and its
reclassification was announced on the Mapping Mountains site on 06.11.15, the
hill was previously listed as a 500m P30 based on the 513m summit spot height
that appears on the Ordnance Survey of Ireland 1:50,000 Discovery Series map 84
and an interpolated col height of c 482m, which gave this hill a listed drop of
c 31m. The hill was subsequently
surveyed by John Fitzgerald on the 30.05.15 with a Trimble GeoXH 6000 resulting
in a 509.1m summit height and 482.6m col height, the surveyed drop of 26.5m is
insufficient for this hill’s retention in The
500-Metre Tops of Ireland list and it is now reclassified to a 500m Sub. The
500-Metre Tops of Ireland total decreases by one and confirmed as 201.
27th
November 2011 – Database of British and Irish Hills publishes The 500-Metre Tops of Ireland.
The
500-Metre Tops of Ireland total confirmed as 202.
1st
June 2011 – Hill Bagging publishes The
500-Metre Tops of Ireland.
The
500-Metre Tops of Ireland total confirmed as 202.
Michael
Dewey and Myrddyn Phillips (February 2017)
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