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Why don't I see "power" attribute from a GPX file?

ronmak
Contributor
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It's been a while since I posted but I am doing something different and after spending some time looking in the forums for a solution, I thought I would just post it.  It's probably something simple, but I have limited experience with FME.

 

I downloaded a GPX file from my bike computer and want to do some data processing on it, but when I view the file in FME Inspector, I am missing the "power" attribute which appears in the GPS as shown below.  

   <trkpt lat="43.7513380" lon="-80.5606200">
    <ele>335.6</ele>
    <time>2023-01-07T13:02:24Z</time>
    <extensions>
     <power>36</power>
     <gpxtpx:TrackPointExtension>
      <gpxtpx:atemp>20</gpxtpx:atemp>
      <gpxtpx:hr>89</gpxtpx:hr>
      <gpxtpx:cad>51</gpxtpx:cad>
     </gpxtpx:TrackPointExtension>
    </extensions>
   </trkpt>

I do get the time, temperature, hr and cad, but not <power>.

I expect it has something to with the fact that it is not in the <gpxtpx> section, but then neither is time or elevation, but I see them in FME.  How do I expose <power>?

Best answer by dustin

Use the XML reader instead of the GPX reader. You will need to set the Elements to Match parameter to the trkpt element.

image

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6 replies

danilo_fme
Evangelist
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  • danilo_fmeEvangelist
  • Evangelist
  • January 7, 2023

Hello @ronmak​ 

 

Please, could you share your data?

ronmak
Contributor
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  • ronmakContributor
  • Author
  • Contributor
  • January 8, 2023
danilo_fme wrote:

Hello @ronmak​ 

 

Please, could you share your data?

Here is the data. Don't get too hung up on the spatial data. It is from a bike computer on a trainer that wasnt really going anywhere!

1 Attachments
nielsgerrits
VIP

I do not have an answer, but as it is XML, it is not too hard do it yourself. XMLFragmenter to get the trackpoints using gpx/trk/trkseg/trkpt as elements to match, enable flattening and you're done.

dustin
Influencer
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  • dustinInfluencer
  • Influencer
  • Best Answer
  • January 9, 2023

Use the XML reader instead of the GPX reader. You will need to set the Elements to Match parameter to the trkpt element.

image

danilo_fme
Evangelist
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  • danilo_fmeEvangelist
  • Evangelist
  • January 9, 2023
dustin wrote:

Use the XML reader instead of the GPX reader. You will need to set the Elements to Match parameter to the trkpt element.

image

Great solution. Congratulations!

ronmak
Contributor
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  • ronmakContributor
  • Author
  • Contributor
  • January 10, 2023
dustin wrote:

Use the XML reader instead of the GPX reader. You will need to set the Elements to Match parameter to the trkpt element.

image

resulting chartThanks! It works great.

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