Elevation gain/loss on planer to high

[HarryH]

Hi,

the calculation of the elevation gain/loss is much to high.

See here https://link.locusmap.app/r/1w8ps3. It calculates 2145 HM!

The same route is stated here on Outdoor Active. There we have around 1600 HM

I hiked this route myself, so the value of Outdoor Active is the realistic one.

When I check the same route on LocusMap Classic and on LocusMap 4, both for Android, I got the same overestimated elevation. The same effect I see also for other routes.

This was not always so. It seems that some time ago there was an update on elevation calculation, which produce wrong and to high elevation gain/loss. E.g. if I just update the elevation data for old tracks on my phone, I got increases of hundreds of HM.

So, please correct this behavior!

[Tapio]

There's no 100% right or wrong but yes, drastic differences. You noticed the "Altitude threshold" slider in track options? That's the recent change in LM.

Let's just talk about that fixed track from OA. I have attached it.

And there is a bug. I have attached it slope colored (auto range) and the result ist mostly green.

[Menion]

Hi guys,
- the difference is indeed big, but it is not a surprise as Tapio wrote.
- we plan to use a more precise elevation data soon, so results will be more precise mainly in highland areas
- the slope is mostly green because there is a segment with a huge slope value. So a limit to -50/50% is necessary.

[Tapio]

the slope is mostly green because there is a segment with a huge slope value. So a limit to -50/50% is necessary.

Ah, yes. Those local extrema easily make auto slope color useless, maybe let algo look more broadly?