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Post details Post   (Contract pics)
Conditions, padode.. by dhmiriam   (Show all posts)
Ten years ago a ma.. by Bleck Cra   (Show all posts)
Simon helpfully ma.. by eflanaga   (Show all posts)
I'm not so sure th.. by simon3   (Show all posts)
Why are there so f.. by padodes   (Show all posts)
simon3
2007-11-09 10:36:05
OS on the wireless
I had a listen to this. The format is .smil which required me to download the free Real player - tedious but perfectly feasible.

The production included a review of OS mapping from the formation of the state in 1922. For hillwalkers there is some interesting background such as about the erection of the trig pillars (mostly in the 1960s) and the re-mapping to use the national grid in the 1970s. And of course there were funny stories such as the one about the surveyor that bought a ball of wall and used it likeTheseus escaping the Minotaur to find his way back. Only the wool had been broken and he got lost, which around Cuilcagh could mean a longish tramp on a huge bog with dangerous sinkholes.

There was some mention of the half-inch series which were the maps that were all that were available until the 90's Really they were very hard to use and had some infamous errors in the contours such the one near Binn Chaonaigh in the Turks.

The 1:50,000 maps we now use are really much better, in particular in the contours. They stand well for readability in comparison with maps such as I have used in France and in Spain, though of course the layer tinting used here works much better in a territory such as Ireland where the maximum height is only around 1000m.

The OSI 1:50k maps are made by aerial survey which is responsible for the better contours. On the other hand, given that there is little surveying in person, there are different forms of error - too many in my opinion - such as errors of detail in river courses and errors about tracks through forests.

Still I wouldn't swap my 1:50k or Trailmaster maps for the half-inch. I rarely use the half-inch at all now though sometimes it is a convenient scale for driving with an eye to the landscape.

Thanks Moac for pointing out something well worth listening to.
Well put dhmiriam... by Alex92   (Show all posts)
'Craw 'said the cr.. by maclimb   (Show all posts)
Oh for pity’s sake.. by Bleck Cra   (Show all posts)
I have only just c.. by kevinshandler   (Show all posts)


RECENT CONTRIBUTIONS 1 2 3 .. 28 Next page >>
Summit Comment
Slieveboy: Default hill
scannerman 4 hours ago.
I've forgotten how many times I've gone up this hill, must be over 50. I live relatively close so its the easy option when larger 'expeditions' are a non starter. It has a very decent balcony walk...

  
Summit Comment
Sugarloaf Hill: Easy access and log book to sign
ilenia 16 hours ago.
Sugarloaf Hill is usually climbed from Bay Lough Car Park, S03056 09981, ample parking there. Cross the road and follow the wall and the eroded path all the way up, it's steep enough but you'll re...

  
Summit Comment
Maulin: Misty morning
simon3 a day ago.
Just sometimes and just for a short while a damp forest can show a misty fairy side. And so it was one January day after a heavy raincloud had passed and the sun had majicked this sprite into the ...

Summit Comment
Slieve Beg: Southern plunge
simon3 a day ago.
The famous side of Slieve Beg is the NE, gashed by the Devils Coachroad. However the SE side also has its drama.Taken on a frosty slippy day from Cove.

  
Summit Comment
Chimney Rock Mountain: Rock, cloud and sea.
simon3 a day ago.
Chimney Rock photographed from between Slievelamagan and Cove.

  
Summit Comment
Dromderalough NE Top: Odd-looking formations
Colin Murphy 3 days ago.
On my approach to the summit I came across a large field of hundreds of these rather striking formations, which I think are are moss-covered boulders, but which looked like giant green ant-hills o...

Summit Comment
Dromderalough NE Top: VL Number 273 bagged....
Colin Murphy 3 days ago.
My final Vandeleur-Lynam! Unfortunately No. 273 wasn't the most distinctive summit (when I came off Mangerton I couldn't even pick it out on the landscape) , but the views from the top are tremend...

  
Track
Pic de Cresp
David-Guenot 2 days ago.
walk, Len: 12.9km, Climb: 1190m, Area: France, Occitanie ()

  
Summit Summary
Dromderalough NE Top: Long route from the south.
Collaborative entry Last edit by: Colin Murphy 3 days ago.
Not normally done in isolation, this top usually forms part of a walk involving Dromderalough itself or Mangerton. One approach is from the north, which has the advantage of a gently rising track ...

Summit Comment
Mullaghdoo: Winter has arrived in the Sperrins
eamonoc 4 days ago.
Visited Mullaghdoo today, as part of a 16.4km tek over the Mullaghs, followed Onzy`s track 2570 and added on the walk out to Mullaghdoo and back from Mullaghclogha, much retracing of steps require...

  
Forum: General
James Forrest - VLs in 2 months man - talks
simon3 2 days ago.
Date: 23rd/24th/25th January 2019Venue: 23rd Jan Dublin24th Jan Thurles25th Jan NewryDetails here: https://mountaineering.ie/events/2013/default.aspx?iid=2214The Vandeleur-Lynams, a list now maint...

  
Summit Comment
Mullaghdoo: Winter has arrived in the Sperrins
eamonoc 4 days ago.
View back over route taken from Mullaghclogha to Mullaghdoo


RECENT CONTRIBUTIONS 1 2 3 .. 28 Next page >>