What I mean is that the GPS calculations are based on a globe. We all know that the earth is not a perfect globe, but a flattened globe. That is reason one for the altitide correction.
Secondl reason: when using it on this "perfect globe", we also have mountains or higher plains, which again require an altitude correction. For a quite simple tutorial see here: https://www.unavco.org/education/resources/tutorials-and-handouts/tutorials/elevation-and-geoid.html Harry 2018-02-17 19:09 GMT+01:00 Poutnik <[email protected]>: > It may be issue of NO -vs CORRECT vs DOUBLE correction. > > As 2 values are about correct and the other 2 values > are having offset about +120' -120' > > Dne 17/02/2018 v 19:05 Harry van der Wolf napsal(a): > > Did you also download the "worldwide altitude correction" map in OsmAnd? > > Your Garmin is maybe internally corrected for that, butOsmAnd does a > "clean" calculation based on the GPS info, and uses that map for altitude > correction. > > > -- > You received this message because you are subscribed to the Google Groups > "Osmand" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/d/optout. > > > -- > Poutnik ( The Wanderer ) > > My Brouter profiles https://github.com/poutnikl/Brouter-profiles/wiki > > -- > You received this message because you are subscribed to the Google Groups > "Osmand" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "Osmand" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
