create graphs of elevation and speed from any files .gpx
 

Hello everyone
I have a simple idea and, I believe, very usual.
I would like to develop a program for maemo 4 (Nx0) that were able to convert the data files .gpx (tracks recorded by GPS) in graphs of lift and speed.
I know almost nothing about programming for Linux maemo, so if someone can help me with this, thank you very much.
My email; angelochelotti@hotmail.com
Here is a model of what I would do:
http://img258.imageshack.us/img258/158/capturaruz.png