Garmin 5S - Distance accuracy

I have a measured 1 km. trail on my property, and whether I do a total of 5 km. or 10 km., or whether I walk, jog or run it, it always accurate within a meter.
Do you have some stride length settings that would cause it to measure different distance for slower (shorter) or faster (longer) actual stride length.

Hello Guys,
I have been using the device for over 7 months and I have a question regarding how accurate is the device when tracking KM/miles.
So essentially I have been running the same lap over and over again and I can see a difference of 1 km sometimes.
Essentially, if I run slowly it measures 10.5 km , if I run faster is shows 9.5 km .
Is this supposed to be like this? If that is the case , the device is using the acceloremeter to calculate the distance and not the GPS,isn't it ? So this will never be accurate.I thought it had the GPS ??

Can you link your runs so we could maybe see where you are having problems? I have a wheel measured mile in my neighborhood plus a another 0.22 mile that I use for recovery when I do mile repeats (1609 meters) and the distance does change just a little depending on pace. That is the same for EVERY GPS device I have ever used. Usually though, my total distance will be a little longer the faster I run. Lots of theories about faster arm swing causing more gps error. But over 10k, it might get around 10.1k and not much more.

Your 1km change seems very unusual. Do you run around a lot of tall buildings or trees that affect the gps signal?

Hello Guys, thanks for writing me back. Before embarking on my laps and bpm , do you know by any chance if the distance is calculated using GPS or accelerometer?

Distance is calculated using GPS unless you have a foot pod and set it up to give speed and distance on outside runs. The default is to always use GPS for distance and speed. Indoors (like on a treadmill) or if you ever lose GPS signals as in a tunnel, then the accelerometer will be used.

So by checking my settings I have Glonass not activated. Could that be the issue ?
speed 3D and Distance 3D are activated.
I run in London following the river thames and only the first part is closer to buildings but not very tall

I have used Google Earth and I have measured the distance by using the ruler and the distance is around 9.5 KM

In attachment you can see the last 10 runs..
I have just noticed that the last run ( the 2nd of January) has also the pace screwed as no way I was running 6.20 min/km ( more likely 7,00 min\km or higher)







ciq.forums.garmin.com/.../1290894.jpg

That looks strange. Are you letting the GPS "settle in" before starting the run? For comparison, I am attaching the distances recorded on my fenix 5 for my local parkrun - always within 1%.ciq.forums.garmin.com/.../1290970.png

Try to Disable 3d speed and distance.

Will do and let you know.
I am going to disable all the 3d stuff and activate GPS + GLONASS.
I will keep you posted.
Thanks for the help

Hello, guys

I have disabled speed and velocity 3d as well as I have activated glonass GPS.
The last 2 runs seem to be accurate.ciq.forums.garmin.com/.../1293504.jpg