Altitude crazy +/-137679m

Denis shared this problem 8 months ago
Solved

Hi,

I have a trouble with altitude since 3 exits on bike.

I use Locus Map Pro 3.25.3 on my Nexus 4 (running with Android 5.1.1).

The altitude / elevation goes from -137679m to 137679m whereas I ride 80km .

You can see a screen capture attached .

My altitude setting in Locus Map is "Automatic correction, use altitude decalage, no pressure sensor.

What is going wrong ? What should I do?

Thanks

Denis

Comments (5)

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1

Good day Denis,

to be true, I never saw such problem, interesting.

May you as first, export your track to GPX file and attach it here? I would like to check if whole track has incorrect values, or it's just few points that cause this mess.

Also did you tried any other application? Just to check if it is Locus only issue.

Last, when you open GPS screen in Locus, elevation values visible here at bottom are correct?

Thank you.

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Hi Menion,

I attach the GPX file as demanded. I hope you will find what is going wrong.

This trouble has already happened the last three times, whereas I had no trouble before since I used Locus Map on the same Nexus 4, for almost 1 year. I had not changed anything on my phone.

When I open GPS screen in Locus, elevation values visible at bottom are correct (see 3rd attached file).

I tried another elevation application and the elevation value is the same as the Locus one (see 2nd attached file).

Thank you for solving my trouble

Denis

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Good day Denis,

thank you for additional information, it helped! Issue is in method how Locus Map compute automatic offset in last few kilometers west of 0° longitude!! Issue found and fixed! Till next version I may suggest to set average elevation offset for your area as I see around 47.5 m or use NMEA offset value.

Sorry for a complications and thanks for reporting of this ugly issue.

Menion

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Menion,

It is great if you have found the fixing ! I will try tomorrow with an exit on my bike. I will let you know.

But, if I set the average elevation offset around 47.5m, will the elevation values be correct on my route ? How does it work ? Is it better than NMEA offset value ?

After that, I will wait for the next version with the fixing as soon as possible ;-) . When will you launch it ?

Denis

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It is a problem, I'm just leaving on vacation and then I plan some more changes in app, so new version will be published somewhere in middle of October.


I forget to mention: if you track has incorrect recorded values like one you send me, use in track detail screen > tools > fill elevation tool. This use downloaded HGT files and replace all recorded values with quite usable ( mainly for non-alpine areas ) elevations. So you may use this also in cases, you set offset incorrectly.


Please check our manual for Altitude manager here: http://docs.locusmap.eu/doku.php?id=manual:user_guide:tools:altitude#altitude_offset , it should give you some answers.

Menion