I was using the profiles function of my etrex30x in order to modify a profile for kayaking. Normally I use the unit for walking and biking. The map was a topo map (FriPro v5, Sweden) and when the "Marine" profile was used the contour/elevation lines on land disappeared.
Now the question is how this is made by the .gpf file that is in the Profiles folder of the gps. The .gpf file seems to be xml type file and opening it in a xml editor shows a lot of entries and many of them makes some sense.
But I can not find an entry that controles whether the contour curves shall be shown or not.
This is really not a big problem, I can use any other profile as a starting point for creating a profile of my taste but i am curious of how it works...
Anybody have some insight in this?