Total Ascent Values Exaggerated by 50% [Bug 29]

[Backstreetbob]

Then i think im not updating, or should I?

End of the day I don't get what you're worried over? The 67 is over reading on the firmware you're on now, so what's it matter if you upgrade to the new firmware? Not exactly anything to lose... Stop being a Noddy.

[Backstreetbob]

Earlier tests with 7.60 on a quite flat hike around sea level led to Total Ascent values of 70-80m. The same hike with 8.30 and Auto Calibration set to the same value as the earlier test (Once) led to Ascent value of 21m. But again as there are many variables this single test is not conclusive and no proof of anything having been fixed by Garmin.

21m is still around 60 feet, surely there should be barely any rise in ascent or descent if it's flat right next to the sea?

[JungleJim]

21m is still around 60 feet, surely there should be barely any rise in ascent or descent if it's flat right next to the sea?

I didn't say it was next to the sea, just that it was mostly at sea level There is a small amount of ascent/descent in the walk, not sure how much exactly but I would guess couple of meters max. So 21m is indeed still too much, but at least it's better than the 70-80m before. And besides, what is the actual correct amount? Not sure there is one, considering the Coastline paradox

I'll continue to do more tests, hopefully that will provide more insights.

[Backstreetbob]

There's not a correct amount. You do the same walk same distance over and over and the ascent and descent will be different everytime. But should be within 20-30 feet of each one..

[Backstreetbob]

Any more walks done with the 67 and reports on the ascent/descent since the new firmware?

[RunnerAndrew]

I will test again on the weekend on the same.route that I did on Monday that had a much more accurate ascent descent reading than previous runs on the same route.
I would get out and test your unit as well to see if any improvements

[Backstreetbob]

Anymore info as to whether the new firmware as fixed the issue?

[Domi93CH]

I took it with me on a car ride yesterday and it actually seems to be better

[mimichris]

When I look at the altitudes of a trace and the altitudes of the points on the IGN map at 1/25000 which are very precise, I have a maximum error of +15%, otherwise, it's more around 8%, my total ascent is 147m and if I correct it with the DEMs accurate to 5m, my corrected total ascent is 96m, or about 50% difference.

[Backstreetbob]

When I look at the altitudes of a trace and the altitudes of the points on the IGN map at 1/25000 which are very precise, I have a maximum error of +15%, otherwise, it's more around 8%, my total ascent is 147m and if I correct it with the DEMs accurate to 5m, my corrected total ascent is 96m, or about 50% difference.

So it's still not working correctly?