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#1 2018-11-23 18:54:28

Viajero Perdido
Member
Registered: 2016-10-13
Posts: 179

Back-end glitch with GPS Traces?

Hi.  This is a bug report, for a glitch that appears to be in the back-end handling of uploaded GPS traces.

It affects this area:
https://www.openstreetmap.org/#map=16/3 … 9&layers=G

When you enable "Public GPS Traces", you see many unexpected lines joining trace points that really shouldn't be connected.  I suspect there's a timestamp problem with some of the traces, and unrelated points from different traces are assumed to be related, and thus are drawn connected.

The same effect happens in JOSM when I try to edit the area.  Download map data, download traces.  I had to find the setting for "points only" to make the traces usable; otherwise the artefacts badly obscured the actual traces.

I know there's probably a more appropriate place in the maze of OSM communication channels to report this, but for now, here it is.

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#2 2018-11-23 19:45:41

mmd
Member
Registered: 2010-11-06
Posts: 1,973

Re: Back-end glitch with GPS Traces?

Thanks for reporting this issue. I posted a follow up here: https://github.com/openstreetmap/openst … ssues/2046

Conclusion seems to be that it's not an issue with the backend, but rather someone who uploaded a trace with unordered points.

The respective JOSM ticket to avoid seeing all those lines would be: https://josm.openstreetmap.de/ticket/16963

Last edited by mmd (2018-11-23 19:59:45)

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#3 2018-11-23 20:29:44

Viajero Perdido
Member
Registered: 2016-10-13
Posts: 179

Re: Back-end glitch with GPS Traces?

Thanks for the links, and for forwarding this to the right place.

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