Hi, I deal with the question if use calibration of altitude based on GPS data or not. My Edge 820 has a barometer which could be sometimes little bit wrong due to weather conditions. That is why Garmin Connect offers calibration of your altitude reached during cycling. I tried it and there are big differences. For example on 25km route Edge 820 showed 65m and after calibration it showed me 95m. Another case on 45km route Edge showed 960m and after calibration 800m. These are really big differnces. Does somebody have an experience with it? What could be more accurate?
The best way is to calibrate the 820 before you set off. The easiest way to do is to create a POI (point of interest) with altitude attached for wherever you're likely to start a ride. (I have one for my driveway.) Then if you're within a certain small distance of that point when you start your 820, it will automatically calibrate the altimeter to that altitude. But you can also manually calibrate to a known altitude on the 820 itself. What Garmin Connect is doing isn't "calibration" (nothing ever gets back to your 820), but replacing the altitudes your 820 recorded with the altitude from a digital elevation map, which will have its own quirks.
Hi, I deal with the question if use calibration of altitude based on GPS data or not. My Edge 820 has a barometer which could be sometimes little bit wrong due to weather conditions. That is why Garmin Connect offers calibration of your altitude reached during cycling. I tried it and there are big differences. For example on 25km route Edge 820 showed 65m and after calibration it showed me 95m. Another case on 45km route Edge showed 960m and after calibration 800m. These are really big differences. Does somebody have an experience with it? What could be more accurate?
I'm assuming you are interested in elevation gain (not altitude).
The "calibration" doesn't really effect the determination of gain. (Climbing 3 flights of stairs is the same whether you did it at ground level or 100 floors up.)
Measurement of gain can't be done with a high degree of accuracy.
Garmin Connect provings an option of looking up elevation in a database for devices that don't have barometers (using only GPS for elevation is inaccurate). But the resolution of the data in these databases is low (they can miss short rises that riders care about). The database results are often lower than the measurement.
Garmin considers using barometric data as being better.
Part of the issue is that people sometimes think the gain data is more accurate than it is in reality. ​​​​​​
Hi, I have a probleem with the attitude meters. My friend had 250m of height and I had in the same ride only 60 meters. I see in garmin connect mine starts at a minimum of -24 meters up to a maximum of 4 meters. But it should start automatically at the actual height of my current location, right? Should someone place help me? I am going to the mountains next week and I want to fix it before. Thanks in advance, I look forward to the solution!
Hi, I have a probleem with the attitude meters. My friend had 250m of height and I had in the same ride only 60 meters. I see in garmin connect mine starts at a minimum of -24 meters up to a maximum of 4 meters. But it should start automatically at the actual height of my current location, right? Should someone place help me? I am going to the mountains next week and I want to fix it before. Thanks in advance, I look forward to the solution!
