You can choose to show gradient adjusted pace or not and control if GAP or normal pace is used for “time in zones”.
You need to setup pace zones in /settings for Run to get the new stuff. For existing runs you can use the “Update Activities” button in /settings to update them or choose “Update Zones” on the “Actions” menu for the activity. This might take a while if many activities require elevation correction.
Elevation correction uses GPS coordinates and topographical maps to determine elevation (and hence gradient used to calculate gradient adjusted pace). The default setting is “Auto” which uses elevation correction for devices lacking a barometric altimeter. Elevation from devices with only GPS is usually very inaccurate. Data from Strava is not corrected because Strava provides data with very good elevation correction.
Note that the topographic maps are not universal so elevation correction might fail. In particular areas more than 60 degrees North (Scandinavia, Alaska, Iceland etc.) are not covered. I will be adding more maps soon.
The activity settings dialog (click “Actions” under the activity timeline chart) controls elevation correction for individual activities:
Intervals.icu maintains a database of devices with barometric altimeters for the “Auto” setting. If your device is not listed with Yes/No or the information is incorrect please click it and supply the correct information.
If the activity also has power and/or heart rate then the “Priority” option decides which is used. The default is taken from the “Time in zones” setting for the sport in /settings.
If elevation correction has been enabled for an activity then you can add the “Fixed Alt” chart to see the corrected profile:
Hi David, could you please take a look at this activity? Intervals.icu
It was a pancake flat track run, but average GAP and load seem crazy even if the elevation correction is enabled
Gradient looks so much better now . Nice clean-up work!
And indeed, runs with stops have strange average GAP compared to non corrected pace. Time in pace zones looks good.
Thanks for the work!
Tx. I just added GAP as an interval field, will deploy Sat AM (GMT+2). You will need to re-analyze or “update zones” on activities to see it. Update zones will keep any existing intervals.
I fixed an issue with the gradient calculation that was impacting that activity. The Strava GAP calculation as applied by me is “slowing down” flat stuff somehow. I suggest turning it off for flat runs until I figure out what to do about that …
What I am seeing (or think I’m seeing…), is that GAP corrects down for low grade decents in a more aggressive way then it corrects up for ascents with similar grade. Or it is me taking more recovery then I should.
I think it may be fine without, it is not really an editable setting? Talking about small changes, I think it would be nice to see GAP in a different colour. The colour palette is very nice btw.
I can’t find a setting for Elevation Correction anywhere, and I need to enable it for my Polar Grit-X, which has a barometric altimeter but is always wrong (by a large amount). Am I missing something obvious here?
. Nice clean-up work!
Kudos!!!
