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Isn't the web wond.. by CaptainVertigo   (Show all posts)
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I have been using .. by padodes   (Show all posts)
Jimmy Barry entere.. by simon3   (Show all posts)
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simon3
2006-12-21 14:12:04
SMC contour maps
Parodes -- yes I would agree that the contour maps are a big advantage on a GPS. The contours are not particularly accurate. They come from "SRTM" data (Shuttle Radar Topography Mission) run by NASA some years ago. They only released 3 arcsecond data. This means for Ireland that they give height information at a spacing of around 56m by 90 metres. Much of the contour detail on the SMC system is therefore "interpolated" that is guesstimated.

MountainViews has a system that allows people to correct summit positions using GPS measurements. Over half the summits in our current list have at least one measurement and as time goes on this will improve. I take your point that what actually is the summit is not clear in some cases. Quite often there is no cairn or marking or there is a trig pillar but not quite at the summit.
I suppose it would be possible to come up with a system which identifies the exact point that is the summit. Would this really be worthwhile? It is possible incidentally that the SMC V2 map is not using the most uptodate positions for summits. Another GPS map we offer (from member Pazapas) uses a recent upload of data - the contours are 50m however.


RECENT CONTRIBUTIONS 1 2 3 .. 21 Next page >>
Summit Comment
Cashloura: An enjoyable walk for all ages
CaminoPat 4 hours ago.
Park at W20849 49704 at Coillte forest entrance just off the R586 Regional Road between Dunmanway and Drimoleague. Follow forest road which is along line of disused west Cork railway line for appr...

  
Summit Comment
An Bhinn Bhuí: Benwee Loop walk towards Portacloy.
ucampbell a day 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 3 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

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

Track
Benwee Coastal Walk
simon3 3 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

  
Track
Near Galtybeg, Galty Mountains (Ireland)
caiomhin 3 days ago.
walk, Len: 11.3km, Climb: 663m, Area: Galtybeg, Galty Mountains (Ireland) Galty...

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

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

  
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...

  
Track
Erris Head Ramble
simon3 3 days ago.
walk, Len: 4.7km, Climb: 95m, Area: Erris Head Hill, Mayo Coastal Hill (Ireland...


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