Originally Posted by
PeteHski
I have always been curious about the Garmin elevation correction feature, which is switched off by default. My Edge 530 is very consistent with elevation gain. On my local loop it’s always within about 20m. On specific event routes where the elevation gain is known it always reports very close to the advertised figure. So I have never felt the need to switch on the correction feature.
The correction feature is disabled by default for devices that use a barometer. It's enabled for devices that only use GPS.
Garmin rates barometric data as better than GPS for elevation.
Originally Posted by
PeteHski
You can manually calibrate Garmin units like this too. Not that I ever have!
The manual calibration is useful for determining altitude (which few cyclists care about). It should not matter for elevation gain.