Discussion: Cool GPS anaylsis

That GPS anaylsis is pretty good. What kindof watch do you have?
Is the 1350m of climb accurate? it seems like a lot.

I have the new GPS-watch from Garmin (forerunner 405). I think it's really good, but the height accuracy is a bit uncertain. If you look at the elevation chart you see that the height differs alot between the different laps, and they should be the same. So I don't really trust that climb value..

If you look at the elevation diagram at 7 km and forward you can see that they resemble the actual hill pretty well (approx 30 meters of climb on the big slope). But before that there seems to be really low accuracy in the gps data. You have to remember that the error has a factor of 3 in height compared to the error in lat/long. So in best case scenario you have around 3 meters of accuracy which gives around +- 10 meters. Altough for most of the time this is a "absolute" error in space coordinates so that the relative height difference between each sample is of better quality. I haven't calculated the size of the relative height error, but one could defintively say that it is lower.