Opened 13 years ago

Closed 13 years ago

Last modified 13 years ago

#204 closed defect (invalid)

GPS trace preview/thumbnail image doesn't show trace but a straight line

Reported by: miki Owned by: steve@…
Priority: minor Milestone:
Component: website Version:
Keywords: thumbnail preview trace Cc:


The trace preview image for my most recent trace ( is shown as a straight line on both "My traces" and the public page above.

As far as I can tell the trace is correctly added to the database (implementing #129 would make that easier to tell ;).

The confirmation mail said that the trace had been uploaded to the database without error.


Change History (4)

comment:1 Changed 13 years ago by steve@…

could it be similar to in that its a long trace almost entirely in one direction? Is there a massive jump to a spurious point miles away? what's it look like in a viewer like JOSM?

Looks like it's in the DB fine.

comment:2 Changed 13 years ago by miki

Actually it's a somewhat curly combined drive and walk from my home to my town center and back again.

I'm quite new at this (both GPS tracing and OSM) so I haven't yet been tinkering with editor applications but I'll probably do that to verify if there's a point which has "fallen off". Does this really happen? I'm using an iPaq and bluetooth GPS (BT-48 from Sanav). Using VisualGPSce ( to record log files and using for converting the NMEA log files to GPX.

Actually I just tried to draw the gpx at gpsvisualizer and it doesn't show any points at all when beeing feed the gpx file so its probably a data problem. I'll look into it later and post my findings.


comment:3 Changed 13 years ago by miki

Resolution: invalid
Status: newclosed

Okay, just grepped a little in the gpx file and found the points below (jump from 8 to 43 long). That'll do it I think ;)

But the timestamp is weird in the gpx too, it was done on the 23. but the dates jump around covering most months of 2006...

Better check the original NMEA file when I get back home...


<trkpt lat="55.4645133" lon="43.1500000">

<course>099.0</course> <ele>22.1</ele> <hdop>03.70</hdop> <sat>5</sat> <speed>1.54</speed> <time>2006-06-03T08:21:00Z</time>


</trkseg> <trkseg>

<trkpt lat="55.4645067" lon="8.4518483">

<course>096.0</course> <ele>21.7</ele> <hdop>04.40</hdop> <sat>5</sat> <speed>1.59</speed> <time>2006-06-04T00:01:13Z</time>



Just uploaded an edition without this single point so lets see how it looks.

Sorry for the needless fuzz.

The dates puzzle me, though.


comment:4 Changed 13 years ago by erik@…

Mikkel did you understand why that point ended up there?

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