After 10 Days Bicycle Holidays with the 1040 Solar - Bug 8 - Estimated Up-Hill is far to much

My experience has been the 1040 is far more accurate than the 1030. The 1030 overestimated and the 1040 is very close to actual.  But I’ve always found a variation from the. 800, 1000, 1030 and now 1040.  I think anything relying only on barometric pressure is not going to be 100%.  Unless of course you want to pay +$1000 for accurate pressure measurement (yes that’s what it really costs as I worked in a company that sold high accuracy pressure transmitters).

As a check under System > Altimeter. Do you have Auto. cal enabled set to on?

I'm NOT talking about the measured uphill meters during a record. The measured uphill meters are very close between 1030 and 1040.

What i mean are the CALCULATED ESTIMATED uphill meters. This value is shown when you select a track for navigation and later at the top left in the height-side.

which maps have you had activated when you made the calculation ??? specially interested in .dem map. .

Garmin DEM Map EU 2020.10

I hope Garmin will use the evelvation data in the imported track (if present) instead of the internal DEM map!?!

According my experience with 830 not. You must have .dem map activated to get sensible estimate from garmin device. If you import gpx file, it makes its own calculation anyway.