Why is the .tcx from BC so minimized?

When I upload a track from my Forerunner 610 GPS watch into Basecamp and I then export the same file to another .tcx file, the exported file is way smaller then the original data. All kind of information is lost.

Part of he input file from the GPS watch:

<Trackpoint>

            <Time>2013-09-11T17:15:28Z</Time>

            <Position>

              <LatitudeDegrees>51.8493667</LatitudeDegrees>

              <LongitudeDegrees>5.8682784</LongitudeDegrees>

            </Position>

            <AltitudeMeters>11.3999996</AltitudeMeters>

            <DistanceMeters>2.5799999</DistanceMeters>

            <HeartRateBpm xsi:type="HeartRateInBeatsPerMinute_t">

              <Value>113</Value>

            </HeartRateBpm>

            <Extensions>

              <TPX xmlns="www.garmin.com/.../v2" CadenceSensor="Footpod">

                <Speed>1.5390000</Speed>

              </TPX>

            </Extensions>

          </Trackpoint>

And at every 1000m point there is additional information:

<Trackpoint>

            <Time>2013-09-11T17:20:07Z</Time>

            <Position>

              <LatitudeDegrees>51.8488438</LatitudeDegrees>

              <LongitudeDegrees>5.8560486</LongitudeDegrees>

            </Position>

            <AltitudeMeters>28.3999996</AltitudeMeters>

            <DistanceMeters>1000.7399902</DistanceMeters>

            <HeartRateBpm xsi:type="HeartRateInBeatsPerMinute_t">

              <Value>172</Value>

            </HeartRateBpm>

            <Extensions>

              <TPX xmlns="www.garmin.com/.../v2" CadenceSensor="Footpod">

                <Speed>3.6500001</Speed>

              </TPX>

            </Extensions>

          </Trackpoint>

        

</Track>

        <Extensions>

          <FatCalories xmlns="www.garmin.com/.../v1">

            <Value>0</Value>

          </FatCalories>

          <LX xmlns="www.garmin.com/.../v2">

            <AvgSpeed>3.5820000</AvgSpeed>

          </LX>

        </Extensions>

      

</Lap>

And then the next 1 km lap begins:
<Lap StartTime="2013-09-11T17:20:07Z"> .....

The exported file from BC for the same point however is:

<Track><Trackpoint>

<Time>2013-09-11T17:15:28Z</Time>

<Position><LatitudeDegrees>51.849366724491119</LatitudeDegrees><LongitudeDegrees>5.868278369307518</LongitudeDegrees></Position>

<AltitudeMeters>11.399999599999999</AltitudeMeters>

<HeartRateBpm><Value>113</Value></HeartRateBpm>

</Trackpoint>

But there is no data anymore on distance and the whole track is also not divided in km-parts.

Why is all this essential information deleted at export? (Or maybe already at reading the input file.)

0 JaVaWa over 12 years ago

The distance between consecutive trackpoints can be calculated, so it isn't critical that this is omitted by BaseCamp; the same applies to the (average) speed. The divisions are more an issue; BC doesn't know that concept (it has something to do with the way BC stores the data internally).
This information is dropped on import.

BaseCamp isn't really suited to handle training data; that's why they previously had the program Traning Center and now Connect.

0 dikkedollie over 12 years ago

Thanks, I have my data also on Connect indeed.

However, during last race, I forgot to press the stop button on my watch at the finish line, so that the results on Connect do not reflect the race itself. I tried to repair that in BC, but it didn't work out when again uploaded to Connect. Result is that splits are lost and average speed etc is gone with the wind.

So, I started to edit the .tcx file manually, which more or less works, as the last part of the data is the only part that needs removal.

Remains the calculation of the speed of the last (edited) part.
Is there a source of information how the numbers are calculated? (Like <Speed> and <AvgSpeed> being e.g. 1.73958. What's the unit? )

0 JaVaWa over 12 years ago

Distances are in meters, and speed in meters/second.

0 dikkedollie over 12 years ago

Thanks!