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Like CaptainVertig.. by bejasus   (Show all posts)
It seems very quie.. by CaptainVertigo   (Show all posts)
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.
It now appears tha.. by CaptainVertigo   (Show all posts)
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RECENT CONTRIBUTIONS 1 2 3 .. 23 Next page >>
Summit Comment
Slieve Bawn: No longer a drive-up
TommyMc an hour ago.
A series of new road barriers means that it's no longer possible to drive further than the car park on the Strokestown side. A very pleasant walk uphill from the car park to the summit and back to...

  
Summit Comment
Mangerton North Top: On the way to Mangerton
MountainHunter 9 hours ago.
I started at Point A car park and followed the path. At about 520m (-9.4817 51.9882) the path swings westward, as you walk along the path, the coum for the Devil's Punchbowl comes into view. After...

  
Summit Comment
Knockalongy South-West Top: Choose your highest point
madfrankie 10 hours ago.
Whichever turfy outcrop is the highest point now may not be in 10 years time.

Summit Comment
Knockalongy South-West Top: Beware of the barrier
madfrankie 10 hours ago.
We followed sandman's route to the summit which is probably the best way to explore Knockalongy and its satellites. Gentle gradients but many eroded peat hags. Worth noting that the forest barrier...

  
Track
Kate's to John's - Na Sléibhte Club Walk
GSheehy a day ago.
When we set up the club we said it was all about the economics of supply and demand - if we supplied challenging walk... walk, Len: 24.9km, Climb: 2015m, Area: Tomies North Top, Purple Mountain (Irel

  
Track
Carrauntoohil via the 'Back Ladder' from the Bridia Valley
peter1 2 days ago.
Park at a small turning place, just opposite The Stepping Stone / Cooky Monsters accommodation and cafe.The route fol... walk, Len: 11.5km, Climb: 1097m, Area: Carrauntoohil, MacGillycuddy's Reeks (I

Summit Comment
Mweelrea: Coastal mountains
simon3 3 days ago.
Ben Bury and Mweelrea form an impressive sight from Clare Island.

  
Summit Comment
Caherbarnagh East Top: An unremarkable summit, worth the visit for the views.
David-Guenot 6 days ago.
The summit is unremarkable though easy to spot as it lies along the fence.

  
Summit Comment
Caherbarnagh East Top: An easy stroll from Caherbarnagh.
David-Guenot 6 days ago.
There is a gate to cross when coming down from the cairn at the NE end of the main Caherbarnagh ridge (I found it was actually easier to cross the fence just right of the gate). There is a faint t...

Summit Comment
Binn Bhriocáin: Long views of a stepped descent.
simon3 3 days ago.
Letterbreckaun can be seen from Clare island, around 33km away. It appears between Mweelrea and the high ground towards the Sheefrys.

  
Summit Comment
Caherbarnagh East Top: A worthwhile addition.
David-Guenot 6 days ago.
This summit is easily reached from the main Caherbarnagh ridge and seems easy enough to get to from Curracahill as well. If coming from Caherbarnagh, best is to cross the fence just before the col...

  
Summit Comment
The Paps East: Two shapely hills.
TommyV a week ago.
There is a forestry road in the Clydagh Valley with parking at W12955 83343. Following this road will lead you out onto the open mountain. From here it's a steep pull up to spot height 562 metres ...


RECENT CONTRIBUTIONS 1 2 3 .. 23 Next page >>