2012-06-23 Sat - The Maths Geek Ride 0001.5 - London to Bletchley to London

Well the usual plots show how high you are, but as a cyclist I'm more interested in whether I'm going up hill, down hill or flat... this would be described by the derivative of the usual plots. I'm surprised they aren't more common

All the data you've requested is achievable on a Garmin but you'd need to configure the various fields. I would assume the same would be true of Brytons or any other random bike GPS unit that may exist.