I agree with eidsvolling! Here in northern Michigan the woods are so dense that when you are in them you can’t see the land marks needed to orient your map and compass. I would challenge any body with just a map and compass in northern Michigan to determine exactly where they are to within a few feet. With a GPS you can determine your exact location and determine if you are on public or private property. In Michigan it is not the property owners responsibility to post the property {although most do} it is the hunters responsibility to know where he or she is.