Friday, 6 November 2015

Mapping Mountains – Hill Reclassifications – The 500-Metre Tops of Ireland


There has been a reclassification to The 500-Metre Tops of Ireland list due to a Trimble survey conducted by John Fitzgerald.  This is the first reclassification to this list since its data were re-evaluated for publication on the Database of British and Irish Hills (DoBIH).  The hill is situated in the western lands of the Beara Peninsula in the south-west of Ireland, and is positioned south-west of the small community of Lauragh and eastward of Ardgroom.
These details are retrospective as the Trimble GeoXH 6000 survey conducted by John Fitzgerald that resulted in the reclassification of this hill from the main 500-Metre P30 list to the 500-Metre Sub-List was conducted on 30th May 2015 in a rainstorm and fog.

Access to the hill can be gained from its easterly ridge that ascends over the 356m top of Cummeennahillan, or an extended circuit can be combined over the hills of Lackabane (Leaca Bhan), Eskatarriff East Top, Easkatarriff (Eisc an Tairbh), Coomacloghane (Com an Chlochain), Tooth Mountain (Cnoc na bhFiacal), Knocknaveacal South Top and finally Knocknaveacal North Top.

The hill is named Knocknaveacal North Top and its summit is positioned at V 744 562.  The hill was listed with c 31m of drop based on a 513m summit spot height and an estimated col height of c 482m.  To the immediate south of this hill is another hill that is given a 513m spot height on OSI maps, this southern top is included in the 500-Metre Sub-List with c 29m of drop and is named Knocknaveacal South Top.  When re-evaluating data for this list’s publication by DoBIH these two hills proved of interest as they could have been listed as either two qualifying P30s, one twin top P30, one qualifying P30 and one Sub (either way round), or one twin top Sub.

The survey by John Fitzgerald with the Trimble GeoXH 6000 resulted in a 509.1m summit height and a col height of 482.6m at V 74321 56081.  The dramatic decrease in summit height from the 513m map height to the 509.1m surveyed height and the surveyed col height of 482.6m gives this hill a drop value of only 26.5m.

This now brings the overall total for The 500-Metre Tops of Ireland to 201, please click {here} to access the list on DoBIH.


The full details for the hill are:

Cardinal Hill:  Hungry Hill

Summit Height:  509.1m

Name:  Knocknaveacal North Top

OSI 1:50,000 map:  84

Summit Grid Reference:  V 74439 56269

Drop:  26.5m


Michael Dewey and Myrddyn Phillips (November 2015)




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