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Post details Post   (Contract pics)
Hi, I've returned .. by KevT   (Show all posts)
simon3
2013-11-14 11:17:35
"The Ordnance Survey lugged this 200 pound theodolite onto the hills." from simon3 Contract pics
Picture: The Ordnance Survey lugged this 200 pound theodolite onto the hills. (Contract pics)

Ordnance Survey talk about surveying.
Wednesday 20th November 2013, 8pm to about 9:30.
A talk about the "Original Survey and Modern Mapping Methods" will be given by Dominic Cronin.

The systematic mapping of Ireland started with the Ordnance Survey from 1829 onwards. To create a map for which all pieces fitted together it was first necessary to measure the earth. The Victorian way of doing this was to measure one length accurately for a baseline and then measure angles to the ends of this to mountaintops and further mountaintops. From this primary triangulation further work led to measuring fields, houses, roads and all other features. At the end of the process there was the creation of the 25 and 6 inch to the mile maps. In contrast modern mapping uses a variety of techniques some based on airphotography, GPS and Electronic Distance Measurement. . . . .
More http://www.walkersassociation.ie/node/37086

Following the talk there will be Q&A and an opportunity to meet others.
Venue for Talks : The Lansdowne Hotel
(Held in The Raglan Room, downstairs behind The Den Bar)
27-29 Pembroke Road,
Ballsbridge, Dn 4
With bar facilities at hand and excellent food available from the bar . . .
a great evening is promised for all!
Entry is free. There is a voluntary collection.
ALL ARE WELCOME . . . . ! ! !
The longer I remai.. by BleckCra   (Show all posts)
"The word “general.. by markod   (Show all posts)
FINTAN O'TOOLE WRI.. by CaptainVertigo   (Show all posts)
Well spotted marko.. by march-fixer   (Show all posts)
Following my recen.. by markod   (Show all posts)
New track built by.. by BleckCra   (Show all posts)
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RECENT CONTRIBUTIONS 1 2 3 .. 21 Next page >>
Summit Comment
An Bhinn Bhuí: Benwee Loop walk towards Portacloy.
ucampbell 17 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 21 hours 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 21 hours 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 21 hours ago.
View from the east.

  
Forum: General
Riddle of the Spinc
BleckCra 2 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 21 hours ago.
Picture from the west.

Summit Summary
Kid Island: Steepwalled island.
Collaborative entry Last edit by: simon3 23 hours 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 23 hours 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 >>