As far as I can see there is no place called Vardal, Oppland on Google Maps.
Michael Buye - Click "edit details" for the location field and enter whatever you want without the Google Map suggestions you get when using the simple field.
Sorry, I did remember incorrectly: It is Geni's own iPhone app some of us got a betatest-version of where you can view the coordinates. It is however much more buggy.
Currently they are generated from the address information using Google Map.
Example from the Api showing what is stored on your own profile:
I have not tested if you can update it as well using the API, but it looks like that when reading the documentation.
The Geni app for iPhone seem to be a dead project at the moment.