Climbing is incorrect for Strava recorded activity

Bug Reports
1

Hi @david,

I just noticed, that intervals.icu incorrectly computes the total meters of elevation change for a Strava App recorded activity fit file (Intervals.icu). On Strava the elevation gain is 276m and on intervals.icu 2804m. The altitude and speed charts also show a sawtooth-like pattern, normal data points interleaved with zeros in the altitude chart. Strava generates two types of records and I assume you inject zeros in case the altitude field is not set. Maybe the preceding value should be used instead or ignored if a altitude value is already present for a timestamp.

214. record
 * enhanced_altitude: 189.0 [m]
 * enhanced_speed: 0.007200000000000001 [km/h]
 * gps_accuracy: 9 [m]
 * position_lat: ***** [deg]
 * position_long: ***** [deg]
 * speed: 0.007200000000000001 [km/h]
 * timestamp: 2021-07-17 09:37:51

215. record
 * distance: 0.04513 [km]
 * timestamp: 2021-07-17 09:37:51

216. record
 * enhanced_altitude: 189.0 [m]
 * enhanced_speed: 0.0036000000000000003 [km/h]
 * gps_accuracy: 9 [m]
 * position_lat: ***** [deg]
 * position_long: ***** [deg]
 * speed: 0.0036000000000000003 [km/h]
 * timestamp: 2021-07-17 09:37:52

217. record
 * distance: 0.04513 [km]
 * timestamp: 2021-07-17 09:37:52

218. record
 * enhanced_altitude: 189.0 [m]
 * enhanced_speed: 0.0036000000000000003 [km/h]
 * gps_accuracy: 9 [m]
 * position_lat: ***** [deg]
 * position_long: ***** [deg]
 * speed: 0.0036000000000000003 [km/h]
 * timestamp: 2021-07-17 09:37:53

219. record
 * distance: 0.04513 [km]
 * timestamp: 2021-07-17 09:37:53

220. record
 * enhanced_altitude: 189.0 [m]
 * enhanced_speed: 0.0036000000000000003 [km/h]
 * gps_accuracy: 9 [m]
 * position_lat: ***** [deg]
 * position_long: ***** [deg]
 * speed: 0.0036000000000000003 [km/h]
 * timestamp: 2021-07-17 09:37:55

221. record
 * distance: 0.04513 [km]
 * timestamp: 2021-07-17 09:37:55

Thank you in advance
Sven

2

That file is very different to all the others I have seen. The alternating records break the import:

Screen Shot 2021-07-19 at 19.15.01
Screen Shot 2021-07-19 at 19.15.01860×618 88.8 KB

Is it possible to get the activity in gpx or tcx format? Intervals.icu supports those as well and they might work.

3

Yes, the altitude and speed charts are now clean when imported from the exported GPX file. Just a minor difference in climbing: 276m vs 296m.

I don’t know if this would be relevant to anyone else. The fit file was the original file downloaded from the Strava website and recorded with the Strava app on Android 11 (Oneplus Nord). This was just a hike and actually the first time I have ever used/tested the Strava App for recording.

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