I'm pretty sure that none of the devices listed by the op use barometric altimeters; even the Garmin Glo is GPS altimetry. GPS is known for its lack of precision in determining altitude. In aviation, old school barometric altimeters are still the gold standard, but they require periodic barometric pressure adjustment. While GPS is great for navigating around the earth, it would be very foolish to use GPS altitude for landing an aircraft. Bottom line: don't expect any phone with only GPS altitude to agree precisely with a database supplied measurement.
<https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail&utm_term=icon> Virus-free. www.avast.com <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail&utm_term=link> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> On Sat, Feb 17, 2018 at 1:41 PM, Harry van der Wolf <[email protected]> wrote: > > > 2018-02-17 19:41 GMT+01:00 Poutnik <[email protected]>: >> >> >> While Europe subtracts altitude by the correction, >> US adds altitude, so the higher value is the (over?)corrected one. >> >> -- >> Poutnik ( The Wanderer ) >> >> > I didn't know that :) > > -- > 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. > -- Robert Grant -- 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.
