What is the use of GPS/Elevation on Bike computers Can any one let me know what is the exact use of GPS/Elevation on Bike computers
(EDGE 500,510 or TIMEX 2.0)?

I ride with a SIGMA BC 16.12 (with CADENCE) and POLAR HRM. I check my elevation using STRAVA.

One reason that i can think of is


  
    all these data collated onto one graph for post ride analysis.
  


Apart from the above reason, is there any advantage of GPS/Elevation detail during the ride?

Thanks
Ever had that "this has to.... be the top.... oh sh$%.... it's a crest.... there's more...." feeling. Knowing altitude lets you pace your climb and arrive the the top without over (or under) doing it. 

Imagine riding flat roads without knowing speed or distance - it can be done, but to maximize training effort or race performance you need to know speed/distance on the flat and altitude/climb rate on the hills.