I have a Garmin Nüvi GPS and it's filled with XML records that look like this:
<trkpt lat="38.900207" lon="-77.008990"> <ele>11.67</ele><time>2013-06-11T04:04:49Z</time> <extensions> <gpxtpx:TrackPointExtension><gpxtpx:speed>6.86</gpxtpx:speed> <gpxtpx:course>271.06</gpxtpx:course> </gpxtpx:TrackPointExtension> </extensions></trkpt>
(line breaks added for legibility)
My question — what are the units for
gpxtpx:speed ? I've examined all of the trackpoints for my GPS and the
gpxtpx:speed never gets much above 30, and I KNOW that I'm going faster than 30MPH.
I've scanned the documentation and I can't find what the units are.