gpx

How do I calculate speed from a gpx file if the speed tag itself is not given?

How do I calculate speed from a gpx file if the speed tag itself is not given? Question: For example, I might have some information like this: <trkpt lat=”-33.8161780″ lon=”150.8710320″> <ele>73.0</ele> <time>2017-07-08T22:05:45Z</time> <extensions> <power>0</power> <gpxtpx:TrackPointExtension> <gpxtpx:atemp>7</gpxtpx:atemp> <gpxtpx:hr>115</gpxtpx:hr> <gpxtpx:cad>27</gpxtpx:cad> </gpxtpx:TrackPointExtension> </extensions> </trkpt> How would I calculate speed from this info? I’ve used the python etree module …

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