Why does my GPS watch measure distance wrong? 

Lol people complaining about a 0.3 mile difference. I'm trying to figure out why my watch says I went 45 miles on a 3 mile hike. Now that's a legitimate problem.

On Garmin devices, make sure to measure every second instead of smart recording to get best accuracy for GPS.

It's not only the measurement every second but also the fact that in a city like New York you have a lot of signal reflection and interference. Do the same distance somewhere in the backcountry and it's much more accurate.

that was really well constructed with the ribbon

not film related but still enjoy seeing you Grif, congrats on the run!

Congratz on finishing the race, Griffin!

Good to know! Congrats on the run!

Head to Settings Select System Click on Data Recording Choose Every Second Recording ...it works for me (Garmin Fenix 5) .... problem solved

Not what I'm subscribed for, but Griffin delivers in such a way that I'd watch it. :)

Stumbled upon this while trying to trouble shoot the inaccurate distance tracking for another Garmin device (An Astro 900 dog tracking kit). In my case it is always overestimating the distance by a huge amount both for me as well as my dog. Eg: If I leave the receiver outside with a clear satellite signal - you can see the distance racking up even if it is simply sitting on the table. I suspect that what is happening is that the receiver software is taking changes in satellite accuracy as distance travelled. So for example: Sometimes your signal can vary moment to moment so that your accuracy range varies (eg: Your position could be accurate to within 15 yards, and then shift to accurate within 5 yards if the signal strength changes). The Garmin software (my guess) takes this change in accuracy as "distance" and adds eg: 10 yards to the track. At any rate, the distance tracking is so inaccurate as to be useless - but the actual track is pretty accurate - so it does serve its main purpose.

Congrats Griffin!

Please any idea why there is sometimes a bid difference in distance and pace when I run with my iPhone and my Apple Watch??? ( Bluetooth turned off ) the Watch is showing longer distance and faster pace. Do you reckon that the iPhone is more accurate because it has bigger GPS receiver ??? Thanks

It's all good. Don't hesitate to make more interesting content like this...

What happens when it is very inaccurate. I ran 5km (according to my Garmin watch at a pace of 4.13 second per km). In reality, my guess is that I had run about 3 km at around 7 mins per km). Why is the watch so far out. Also when it transfers it to strava, it says that the time of run was 7.35pm. Real time was 1pm

We will soon have a three times more accurate technology thanks to Galileo ;) Only a few smartphones are compatible right now, but it should improve a lot !

Maaan, I though there would be a solution for this :(, I have a garmin fenix 3, what Can I do to make it more accurate?, Its always different than my phone gps

Great video Griffin!

I ran my usual 8.25 mile route today. My Garmin showed 8.27 miles (no biggie), but it showed a best pace of 1:30/mile. I did not pause my watch at all. Did the satellite "lose" me, then miscalculate my position? Did my watch lose time for a brief period?

how did you make the preview at 1:00 ?

What about running on a track?

The course is measured 100% accurate, on the shortest route. It's natural you would be over a few hundred yards. You're nowhere near a straight line. You're jammed with hundreds of people. Going at least 20 yards extra per mile. Especially the first 10 miles. Thats why it's going to be over. You did not run 13.11. You actually ran 13.41.

I wonder why my Garmin watches are always way off and my Polar watches are reasonably accurate...

so that watch is not for the survival gear as it need to be charging every 10 hr with GPS on

Title??

Very interesting

Same with agps?

That title doe!

Use GPS+Galileo. This problem goes away...

How does the GPS on a phone work so accurately?