Interesting. I've never thought to check my iPhone 6s altitude. I just
opened it up to see it proclaiming me at 10 feet (sitting down). I
lowered it to the floor and then stood up and raised it as high as I
could. No change. About 30 seconds later it changed to 30 feet while I
was standing but no longer holding the phone aloft. I don't know the
exact altitude here but believe it to be 20-25 feet.
Chuck Norcutt
On 4/26/2016 11:59 PM, Mike Lazzari wrote:
A gps is much more accurate with lat/lon than with elevation. I'm going
to guess that the absolute accuracy as stated by your phone is
approximate and will change as you move around. Tree cover, buildings,
canyon will make a big difference. This will change the relative
accuracy of course. May be 30m at the bottom in the trees and 10m on
top. With my handheld gps I can calibrate the gps altimeter with the
barometer. Don't some/most new phones have a barometer? Might improve
vertical accuracy. I find that if I stand still for a while the
elevation bounces around and settles down to about 3-5ft +/- depending
upon circumstances.
M
--
_________________________________________________________________
Options: http://lists.thomasclausen.net/mailman/listinfo/olympus
Archives: http://lists.thomasclausen.net/mailman/private/olympus/
Themed Olympus Photo Exhibition: http://www.tope.nl/
|