Distance accuracy

Hi all,

Today I've observed something quite interesting regarding total distance of an activity.

I've tested gps version 2.20 vs 2.24 by doing the same 5k walk twice on the same day. The gps version 2.20 had a lot of drunken man syndrome which was not present in version gps 2.24. A clear improvement. So I was expecting the total distance for 2.20 to be longer than for 2.24. However, both were exactly the same (5.3k).

However, I've imported both tracks to Basecamp and the real distance for 2.20 was 5.5km while for 2.24 was still 5.3km. The drunken man syndrome equated to an extra 0.2km. Therefore it looks like Garmin applies some sort of smart algorithm to estimate the true distance. That's why when people look at Strava vs Garmin it looks like the Fenix 5 is always tracking shorter while in fact might be more accurate.

This is just a 1 off test but there might be something here.

Let see what others think.