On 2020-05-04 09:10, Peter Elderson wrote:
> Thanks for explaining why my android phone says I am at +38m (+/- 3) in my
> backyard when in fact it is at Dutch sea level -4.4m.
GPS receivers, including Android phones, should adjust the GPS WSG84
height to "sea level". But the vertical accuracy of GPS is much less
than the horizontal accuracy, and it needs more satellites in the fix to
give a decent altitude. I live pretty much at 0m NAP, and the altitude
it shows varies a lot, both above and below zero.
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