OptionalavgOptionalavgPer-split channel aggregates (mean of finite samples; max of finite
samples) — present only when the matching stream is supplied to
splitsByDistance via extras. Speed is m/s.
OptionalavgOptionalavgDistance covered in this split, metres (the last split may be short).
Elapsed seconds within the split.
Elevation gain within the split, metres.
Elevation loss within the split, metres (same ±3 m hysteresis as gain, reference carried across split boundaries).
1-based split index.
OptionalmaxOptionalmaxOptionalmaxOptionalnormalizedNormalized power over the split, watts — present only with a power meter
(caller passes the 30 s-rolled power; see splitsByDistance).
A per-interval split (the per-km/per-mile row).