[Tibbs]

Yes, I did the F1 track plans.

Just for the benefit of anybody else who might want the elevation profile of a circuit, you can do this in google earth. Not the online version I don't think, but definitely with the version you download.

Firstly you need to draw the shape of the circuit using the path tool. Then in the sidebar, you can right click on the name of the path you've just created, and choose Show Elevation Profile, and you get the following...



You can then move the cursor along the elevation profile and an arrow on the map will show you exactly where the corresponding place on the track is.

Thanks Jason, thats really handy.
I found these two diagrams which are quite pretty good.
   
   
cheers
Tony