What's wrong with my pseudo waypoint / fake trackpoint GPX file ("Expected state TRACKPOINT, got state UNKNOWN XML parser")?

Question

I am lost with a GPX file. It was recorded with Quick Position App, then the names were stripped and the way points replaced with track points following the requirement of OSM. I was first getting (trying to upload to osm.org) the most informative Found no good GPX points in the input data (the reason being that the original file contained way points only), and now it's Expected state TRACKPOINT, got state UNKNOWN XML parser at line 3 column 2. I am stuck and would appreciate help.

<?xml version="1.0" encoding="UTF-8" standalone="no" ?>
<gpx xmlns="http://www.topografix.com/GPX/1/1" creator="matt" version="1.1" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.topografix.com/GPX/1/1 http://www.topografix.com/GPX/1/1/gpx.xsd">
        <ele>200.9063513539106</ele>
        <time>1990-04-27T14-56-57Z</time>
    </trkpt>
    <trkpt lat="54.55410358198684" lon="25.3773501871292">
    <trkpt lat="54.55414923144265" lon="25.377350253212516">
        <ele>201.31068553007708</ele>
        <time>1990-04-27T14-57-05Z</time>
    </trkpt>
    <trkpt lat="54.55458511446888" lon="25.37838106148478">
        <ele>221.71354527843178</ele>
        <time>1990-04-27T14-58-38Z</time>
    </trkpt>
    <trkpt lat="54.554818184474456" lon="25.378866436901745">
        <ele>224.6318238358151</ele>
        <time>1990-04-27T14-59-21Z</time>
    </trkpt>
    <trkpt lat="54.554907515743935" lon="25.379065394625034">
        <ele>224.77350879803234</ele>
        <time>1990-04-27T14-59-34Z</time>
    </trkpt>
</gpx>

Accepted Answer

The first trackpoint misses an begin tag and the second an end tag (that is no formally valid XML). I guess you swapped lines (line 6 should be line 3). The time format is wrong, too (apparently needs to be in ISO 8601 format). Maybe trk and trkseg elements are needed too (it seems they are not for uploading to OSM, thanks @Kotya for testing it, maybe they are for standard compatibility). You can check your XML file by uploading or pasting at http://validator.w3.org/ for formal errors. Suggestion:

<?xml version="1.0" encoding="UTF-8" standalone="no" ?>
<gpx xmlns="http://www.topografix.com/GPX/1/1" creator="matt" version="1.1" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.topografix.com/GPX/1/1 http://www.topografix.com/GPX/1/1/gpx.xsd">

<trk>
<trkseg>
    <trkpt lat="54.55410358198684" lon="25.3773501871292">
        <ele>200.9063513539106</ele>
        <time>1990-04-27T00:00:00Z</time>
    </trkpt>
        <trkpt lat="54.55414923144265" lon="25.377350253212516">
        <ele>201.31068553007708</ele>
        <time>1990-04-27T00:00:01Z</time>
    </trkpt>
    <trkpt lat="54.55458511446888" lon="25.37838106148478">
        <ele>221.71354527843178</ele>
        <time>1990-04-27T00:00:02Z</time>
    </trkpt>
    <trkpt lat="54.554818184474456" lon="25.378866436901745">
        <ele>224.6318238358151</ele>
        <time>1990-04-27T00:00:03Z</time>
    </trkpt>
    <trkpt lat="54.554907515743935" lon="25.379065394625034">
        <ele>224.77350879803234</ele>
        <time>1990-04-27T00:00:04Z</time>
    </trkpt>
</trkseg>
</trk>
</gpx>

Please delete such fake tracklogs (the connected waypoints make no sense I guess) after using it. By the way: with Potlatch2 or JOSM you do not need to upload a gpx. You can even use a local gpx file with real waypoints. Despite that feature the obligatory warning: uploading tracks(!) is useful for other people (averaging several traces to try to eliminate some gps errors) - so, please continue to upload real tracks (maybe only if not tooo bad reception quality/smartphone/bad gps receiver).

Answer 2

1

You don't need to convert waypoints to trackpoints - leave the waypoints as is and add a fake track segment and track point corresponding to the first waypoint.

permanent link

answered 11 Aug '13, 15:07

SomeoneElse ♦
36.9k●71●370●866
accept rate: 16%

1

Ah, yeah, indeed. I missed to mention that. However, if you only want to use the waypoints yourself (not for use by other mappers), then uploading waypoints is not needed at all - and therefore even more easy (no editing needed).

(11 Aug '13, 15:11) aseerel4c26 ♦

What's wrong with my pseudo waypoint / fake trackpoint GPX file ("Expected state TRACKPOINT, got state UNKNOWN XML parser")?

Follow this question

Related questions