GPX/FIT file comparison

Bluefish, thought I'd continue the discussion here.

There does seem to be an element of elevation smoothing adding to this

Using Garmin Basecamp to compare the FIT and GPX

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iLikePotatoes over 4 years ago +2

GPX file is GPS plots, FIT file is GPS plots plus Garmin magic. If you have good GPS signal and Garmin magic is on your side - distances will be same or difference will be very small.

If GPS signal is…
Simone.01 over 4 years ago in reply to Dr Phil +2

Dr Phil said:
If GC sends the GPX file to Strava why then do I rarely see any difference in distance?
Ɛpsilon said:
Like you I’m not seeing it. I think strava gets a FIT file but I’d happily be corrected…
Ɛpsilon over 4 years ago +1

Fit file says

Gpx says

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0 6928399 over 3 years ago in reply to Holger

That's really not too bad for 10k. I tend to lose this much on shorter runs, in a town. Yes, there are iffy spots with tree-lined roads and the occasional slightly higher building, but even in the 'bad part' of town with wide roads, little vegetation and flats far away from the road I'm losing meters. Less than in other parts, mind, but the problem always seems to be present.

0 Ɛpsilon over 3 years ago in reply to Holger

Much climb? I'm more interesting in loss/gain due to elevation - i know AndersB is looking at distance :)

0 Holger over 3 years ago in reply to Ɛpsilon

No, mainly flat, +/- 1m on that part.

0 bluefish over 3 years ago in reply to 6928399

6928399 said:
Yes, there are iffy spots with tree-lined roads and the occasional slightly higher building, but even in the 'bad part' of town with wide roads, little vegetation and flats far away from the road I'm losing meters. Less than in other parts, mind, but the problem always seems to be present.

Yes, I also observe that

0 Lost in the Wild over 3 years ago in reply to Ɛpsilon

Yeah. I think I follow and yes there definitely seems to be some sort of internal hierarchy going on.
I still haven’t installed the Thorn map but with all maps ‘on’ today, it defaulted to the Topo Light V9 map (verified by individually turning the maps on/off).

I shall play some more when time permits. Still need to sort all my settings back out after the reset first.

Appreciate all you help with the map side of things.

0 Lost in the Wild over 3 years ago

To get slightly back on track after my map distraction.

I did a short walk in the woods this morning with the dog and used my watch and also my phone to record. So, some data:

Fenix 6s Pro: Left wrist:

Dist- 2.24mi

Gain - 57m or 187ft

Loss - 61m or 200ft

Max Elevation - 88m or 288ft

iPhone 11 Pro/Adidas Running: Right pocket:

Dist - 2.25mi

Gain - 56m or 183ft

Loss - 60m or 190ft

Max Elevation - 88m or 288ft

Number in bold are as reported by device/my settings

So admittedly a short bit of data but shows very little variation between two different devices. Certainly close enough to be with margin of error.

I’m in the Lakes next weekend so if I remember I’ll record with both devices again and see if more discrepancies creep in.
Also planning to hit a couple of local trig points next week work commitments permitting so will compare data from devices vs Ordnance Survey data for the trig.

0 Ɛpsilon over 3 years ago in reply to Lost in the Wild

Great stuff. Yeah, pretty small discrepancies. Have fun!

0 Szunyog007 over 3 years ago in reply to Ɛpsilon

At the end I have purchased both the Topo light and the Thorns :)

I tried to enable both plus Talkytoaster one and create routing and seems to me working fine.

I'll try later on afternoon and report back how was the distance as well. The weather is quite bad now so I don't promise.

0 Ɛpsilon over 3 years ago in reply to Szunyog007

Great stuff! Yeah, I bought both. For me anyway, TL is SLIGHTLY more accurate on some local changes, but Thorns has so much data. Considering how cheap they both are, I didn't see it as an either/or.

Enjoy.

0 Szunyog007 over 3 years ago in reply to Ɛpsilon

Thank you and for your help too.