Why such different elevation corrections? (same route logg 1790m, 2615m, 3468m elev gain)
I rode with a friend the other day . I use a Garmin FR 305, he uses an IPhone.
When I uploaded FR305 -> Strava, the elevation gain is 2,615m, see http://www.strava.com/activities/138096662
When I uploaded FR305 -> Garmin Connect, the elevation gain is 1.790m (with elevation correction enabled) and 1.724 m (with elevation correction disabled) see http://connect.garmin.com/activity/494258370
My friend uploaded from IPhone Strava app , he logged 3,468m, see http://www.strava.com/activities/138064391 (maybe this activity is not visible to public)
The Garmin FR 305 is pretty accurate, I have compared data from Garmin Edge devices, and the difference < 5%
It would be good if it was possible to disable the elevation correction in Strava, it is not working very well. Garmin Connect. has the possibility to disable elevation correction even though it does a good job. Maybe the elevation correction algorithm / database works fine in the US but where I am, it is no good.