Hi there!
I've just finished a workout which consisted of a walk along a beach to the neighbouring town (Dawlsih in Devon). I never went more than about 30 feet above sea level, but the data says that I was over 80m (250 ft) at one point! Bearing in mind the accuracy of the data in terms of position horizontally, why is there such a big discrepancy? Is this common and can the height be calibrated if you know it?
David
To quote pixelgeek in the following thread http://betalabs.nokia.com/forum/topic/531
"general gps accuracy
Normally height accuracy of a GPS antenna is 2-3 times worse than the position accuracy.
Your position accuracy is depending of the antenna and the GPS you're using. Normally it's between 10-15m, which means your height accuracy would be about 20-45m."
An altitude offset can be introcuced in Settings / General / Altitude Offset.