Geofence enter/ext time: how is calculated?

Let me understand something.
I have a geofence enter and exit event and its times are lets say t1 and t2.
See in the image below, where t1=10:24:09 and t2=10:42:12
Geofence enter/exit

But, when I follow the points of the route, I noticed that the enter point and the exit point times, lets say t3 and t4 (which I know are the correct times) are quite different from the t1 and t2 times. See the images below
t3=10:24:04 and t4=10:40:48

route enter point

route exit point

I set my devices report each 5 sec. ok 5 to 10 sec difference is ok, But t2 and t4 are quite different.

Why such a difference? Is there any problem with the algorithm that calculates the geofence enter and exit times, or I"m missing something? Is there any property to tune this?
Thanks in advance
Stavros Kostomanolakis

Anton Tananaev6 years ago

Events use server time. Positions are using GPS fix time. So, it's possible to have differences, for example, when your device reports old buffered data.

So, in my case that I want to time a cyclist in a segment, and I want to be more accurate, is there any way to have the geofence enter/exit in fix times and not in server times?

Anton Tananaev6 years ago

You can always check position linked to the event.

I get it. So, I have to retrieve the position the event is referred to and get the time I want.
This is a solution to my issue
Thank you very much