|
Jul 2017
11:04am, 17 Jul 2017
3,052 posts
|
STOOSH
Looks like the data has some serious flaws - i wouldn't bother using it as any sort of guide. My legs and body normally tell me how tough the hills are 
|
|
Jul 2017
11:05am, 17 Jul 2017
26,903 posts
|
HappyG(rrr)
Is there actually anything that can accurately measure ascent and descent to a metre here or a metre there? We know GPS is rubbish (esp when it's very small ascent and descent, where the measurement variance is more significant than the actual ascent / descent being measured). And do the barometric altimeters work to 1 metre or two or are they 10s of metres really too? G
|
|
Jul 2017
11:12am, 17 Jul 2017
1,994 posts
|
IanS
I think you would need a good quality GNSS which could use both GPS and GLONASS to track the course to within 2.5m, and then overlay that on a hi-res OS map and use the contour data
[not the practical method I grant you]
|
|
Jul 2017
11:19am, 17 Jul 2017
8,338 posts
|
Son of a Pronator Man
Can't a surveyor go out and measure it with a theodolite?
|
|
Jul 2017
11:22am, 17 Jul 2017
295 posts
|
zp
Think LIDAR data is the most accurate elevation tracking - quoted accuracy of less than +/- 20cm, and grid sizes down to 25cm .. but coverage is very sketchy, which is I suspect is why Google Earth shows 3D buildings in central Glasgow but everything gets very two dimensional out in the wilds of Milngavie
Massively impractical for tracking course elevation though I guess.
|
|
Jul 2017
11:28am, 17 Jul 2017
3,813 posts
|
Metro_Nome
Going back to the DRAM thing, it was a shame the finish line clock was out (I wondered why I had about the same time on my watch as the clock when I started right near the back of the field!) but the organisation was decent this year.
He's definitely a bit of a character and seems to do everything on his own, but I would do the race again, I didn't have any issues on Sunday although some of the organisation was a bit... quirky
|
|
Jul 2017
11:33am, 17 Jul 2017
13,887 posts
|
Dvorak
For a course which isn't near flat I think mapping on Fetch (or using St*a*a) figures is reasonably accurate, with a crosscheck using a proper contour map. Google-based plotting tends to come out a little over and strava a little under.
So for example the figures for Falkirk, Tollcross and Dunfermline are fairly accurate (all between 80-90m ascent iirc which is a fair amount over 5km, as are Ruchill and Springburn (a bit less). Anyone who has run those courses will know that feels about right. Drumchapel, cross-checked on contour map, under-measured the ascent I think, as the course is back and forth (and up and down) a slope.
Conversely, I can find on my download that a trip along the flat or near flat towpath has had a surprising (ie rubbish) amount of ascent/descent. And a mile on the Stirling Uni track has and ascent/descent of 28m :-p.
|
|
Jul 2017
5:05pm, 17 Jul 2017
108 posts
|
Ally-C
MN, I actually didn't think the DRAM was that bad yesterday, thought from memory it was hillier tbh. Not overly keen on those buses, quite cramped and a good few folk on ours got travel sick.
Have to say though, nae fan of the organiser chap. However, it's a cheap race to enter.
|
|
Jul 2017
5:35pm, 17 Jul 2017
3,815 posts
|
Metro_Nome
I was alright on the bus because by the time I finished the marathon there was hardly anybody left and I got on the last bus so we had heaps of space! pays to be slow
|
|
Jul 2017
8:06pm, 19 Jul 2017
12,495 posts
|
Angus Clydesdale
Evening All.
Question for the Embra Fetch Massive. Currently holidaying in Portobello / Joppa and looking for recommendations of where to get a good fish supper (pref sit-in). Anywhere along between Leith and Gullane.
Cheers
|
