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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.
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RECENT CONTRIBUTIONS 1 2 3 .. 21 Next page >>
Summit Comment
An Bhinn Bhuí: Benwee Loop walk towards Portacloy.
ucampbell 20 hours ago.
The Loop walks here are well signposted, it's a great idea to go out onto each headland.

  
Summit Comment
Doonvinalla N Top: Coastal Hill
sandman a day ago.
On 26/4/2014 i spent a very enjoyable afternoon walking this area visiting the army observation hut and the stone constructed EIRE marking as part of an addition to the Benwee Head Loop walk but i...

  
Summit Comment
Doonvinalla N Top: Flat topped but hard to get to.
simon3 a day ago.
View from the west.

Track
Circuit of Dirkbeg Lough - easier ascent
simon3 2 days ago.
The purpose of this walk is to reach the Maumtrasna plateau and Maumtrasna NE top (MNET). The lattter is quite possib... walk, Len: 11.6km, Climb: 564m, Area: Maumtrasna North-East Top, Partry/Joyce

  
Track
Near Galtybeg, Galty Mountains (Ireland)
caiomhin 2 days ago.
walk, Len: 11.3km, Climb: 663m, Area: Galtybeg, Galty Mountains (Ireland) Galty...

  
Track
Benwee Coastal Walk
simon3 2 days ago.
The walk starts at a small carpark and Wild Atlantic Way sign just west of Benwee. In fact some of the local rock has ... walk, Len: 8.1km, Climb: 245m, Area: An Bhinn Bhu?, North Mayo (Ireland) An B

Summit Comment
Benwee NE Head: Jagged summit
simon3 a day ago.
View from the east.

  
Forum: General
Riddle of the Spinc
BleckCra 3 days ago.
I was at Glendalough yesterday and on the Spinc for the first time. I cannot imagine there haven't already been a thousand hours debate on the boardwalk and and that there won't be a thousand hour...

  
Summit Comment
Benwee NE Head: Jagged summit
simon3 a day ago.
Picture from the west.

Summit Summary
Kid Island: Steepwalled island.
Collaborative entry Last edit by: simon3 a day ago.
Kid Island is very visible from Benwee Head.

  
Track
Lenadoon Coastal Walk
simon3 3 days ago.
walk, Len: 2.5km, Climb: 8m, Area: Mayo Coastal Hill (Ireland)

  
Summit Comment
Buckaun East: Cliffy north edge.
simon3 a day ago.
This is a picture of Buckaun East taken from the valley below.. Obviously the safest way to go up and down this is to the left or south of the ridge.


RECENT CONTRIBUTIONS 1 2 3 .. 21 Next page >>