Data in fit and gpx files with same activity are different

Discussion related to the Garmin Montana 7x0 series GPSr
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felix750
Posts: 6
Joined: Thu Feb 11, 2021 6:21 am

Data in fit and gpx files with same activity are different

Unread post by felix750 »

When you save an activity with both fit and gpx output format, the data when view in the GPSr are slightly different, such as Distance, Ascent-Total, Descent-Total, Min-Elevation, Max-Elevation .... etc.

If you use the fit file and save as track, then the data in this gpx file would be the same as the fit file.

Further explorer to these two gpx files with notepad and found that, the gpx file saved by fit file includes an additional statement - "TrackStatsExtension" like the following:

Code: Select all

<gpxtrkx:TrackStatsExtension><gpxtrkx:Distance>11505.000</gpxtrkx:Distance><gpxtrkx:TimerTime>21224</gpxtrkx:TimerTime><gpxtrkx:TotalElapsedTime>21231</gpxtrkx:TotalElapsedTime><gpxtrkx:MovingSpeed>0.699</gpxtrkx:MovingSpeed><gpxtrkx:MaxElevation>638.000</gpxtrkx:MaxElevation><gpxtrkx:MinElevation>10.200</gpxtrkx:MinElevation><gpxtrkx:Ascent>904.000</gpxtrkx:Ascent><gpxtrkx:Descent>874.000</gpxtrkx:Descent><gpxtrkx:Calories>417</gpxtrkx:Calories></gpxtrkx:TrackStatsExtension>
Other than that, the data recorded in these two gpx file are same

The GPSr or other applications seems to use the data in this statement instead of by calculation of the recorded data.

Don't know which one is more accurate.
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GPSrChive
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Posts: 3882
Joined: Fri Jan 20, 2017 11:29 pm

Re: Data in fit and gpx files with same activity are different

Unread post by GPSrChive »

Do the FIT and GPX files you have inspected have the same number of track points, with similar intervals between them?

If the FIT and GPX files are recording at different intervals, it would be understandable that statistical data may not agree at selected points in the recording.

If you have saved FIT and GPX files to share, please send to webmaster at GPSrChive dot com.

Thank You!
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