GPS can be a pretty tricky subject to understand. A couple of useful points are:

There is a good discussion of this stuff at .

The link below gives all the GPS points recorded in the thesarvo guides in KML format. It is designed so as to be able to be imported into your GPS, but you'll probably need to convert it - maybe to GPX. GPSBabel is good for that kind of thing.

But you can load this file up directly in Google Earth: