Hi,
I noticed that my gps (garmin gpsmap64s) live stats are quite different from the stats reported by mapsource from the same exact track. In the past, I thought it was user error but recently I paid a bit more attention to it. As you can see in the attached picture none of the stats match. It doesn't bother me much but I'm curious why this is happening. The difference is quite significant and I cannot think of any good explanation. The only thing that could explain it is that the GPS is calculating the statistics more often and does it even in the places with very bad coverage when the position jumps all over the place. The recorded track is more sparse and contains less of the errors and is then shorter. However, I would expect garmin software to be smarter than that and be more accurate than the sparser resulting track at the end. Does anyone know or have any better theories?