Comments on: Route to Christmas: Day 17 2013

By: o-zeugs

o-zeugs — Tue, 17 Dec 2013 15:14:27 +0000

If mapping following the international standard, I’d suggest that.

By: Jan Kocbach

Jan Kocbach — Tue, 17 Dec 2013 14:51:43 +0000

Thanks a lot for your effort! Always nice to get a real analysis:) I guess the light green should probably have been mapped as white (at least at this point in time?) while the middle green should probably have been mapped as light green?

By: o-zeugs

o-zeugs — Tue, 17 Dec 2013 14:47:51 +0000

I used 2D-Rerun to the following analysis. Jan is right, that white is faster than green but that is mostly because it is Mihalkin who runs through it… Salin runs a generally lower pace. On the leg 14 he runs 4:00/km on track, 4:54/km on white, but this is only a short stretch. Taking into account all the more or less flat, white areas Salin crossed in this competition I estimate an average 4:30/km on white. Now according to the map norm, light green should correspond to a reduction of 60-80% of the running speed, in Salins case 5.6-7.4min/km, middle green should correspond to a reduction of 20-60% of the running speed, in Salins case 7.4-22 min/km. Salins speed on this leg in the light green is 4:40, in the middle green between 5:07 and 7:13 min/km.All in all, the speed reduction is not as significant as one could expect from the map. That also explains the contrast between Salins green route and the 140 routes collected above, all trying to avoid or minimize the middle green.

By: o-zeugs

o-zeugs — Tue, 17 Dec 2013 08:18:48 +0000

Interesting to compare Salin with Mihalkin. While Mihalkin is 9% faster in the overall, Salin runs Mihalkins speed while going through the green (right route choice, dot analysis). Only the very last green seems to have effect on Salins speed. This well raises some concerns in regard of the mapping. http://lazarus.elte.hu/tajfutas/isom2000/isom-000404.pdf#page=8