Originally Posted by
limbot
Be aware too, that using your phone or GPS elevation can be a bit precarious depending on where you live and ride. When you log a ride with say Strava it uses elevation maps to work out your elevation and these are sometimes a little off, especially where you're on the side of a mountain or similar.
Many phones now have barometric altimeters. iPhone 6 does for example. Of course, that doesn't stop Strava correcting them.
