Hi,

I suspect that one of 2 things is happening.
- You may be using a bad turnpoint database. I recommend the data found he
http://cumulus-soaring.com/seeyou.htm#Downloads
- If you are viewing a flight log, SeeYou can automatically use the take-off and landing elevations and the SeeYou ground elevation database to offset all the flight log points to account for barometric pressure changes. It is a very nice feature.

You may want to check-out my SeeYou Tips document.
http://cumulus-soaring.com/seeyou/SeeYou-Tips.pdf

Best Regards,

Paul Remde

On Friday, January 31, 2020 at 9:59:13 PM UTC-6, soaringjac wrote:
Just started using seeyou for the first time. I created some waypoints in seeyou and noticed the altitude shown for some of the waypoints are way off. I double checked the exact same point in Google earth and the difference is about 1000'. This isn't the case for all custom waypoints I made, but it is true for most of them. How are you guys creating accurate waypoints and waypoint altitudes. Kind of crazy that seeyou is so off!