For some reason that only DJI know, in firmware versions after 1.4, DJI replaced the altitude number in the Exif data with altitude data from the GPS.Looking at some metadata records I found severe differences between Go app log and photos metadata. 300m vs. 220m.
How is that?
You can recalibrate the IMU idf you have problems with the telemetry altitude but there's nothing you can do about GPS altitude.I forgot to say I was no more than 10 meters over the sea level.
I use exiftool. It shows a long list of shot properties.
I found Absolute Altitude: +225 and Relative Altitude: +300m
According to that I should have been diving with my RC. Don't remember that!
Is it possible to calibrate altitude?
The Garmin Oregon has a built in barometer for altitude.Okay, thanks a lot for your explanation.
In my case Relative Altitude seems to be accurate and enough data.
I have a Garmin Oregon I have to calibrate Altitude regularly I suppose because of what you have explained.