We just got a question that seems to be about satellite navigation but not about GPS. At least the gps tag wasn't used on it until I added it after checking that we have no sat-nav or similar.
Since I'm still pretty fuzzy on what is and is not a GPS and/or satnav I'm not really sure where they overlap etc. Google Maps seems to do this job for me but I have no GPS and there's not usually a satellite involved. On the other hand I'm sure there are older devices with GPS and no mapping, or at least which can't tell you routes even if they have maps.
So what single tag or minimal set of tags would be the clearest to cover the concepts ranging between global positioning system, satellite navigation, and mapping+routing things like Google Maps?