Re: [android-developers] Barometer reading changes throughout the day while on same altitude.

Wouldn't I need a lock on the GPS location in order to get the altitude? I would assume that would take more time, hence more power then just using the barometer.

What about the altitude apps. How do they usually determine the approximate altitude. Do they suffer from +/- 500 meter inaccuracy?

I don't have any experience with this, that's why I'm asking here.

Thanks.

On Sunday, December 30, 2012 5:05:12 PM UTC+3, Mark Murphy (a Commons Guy) wrote:

On Sun, Dec 30, 2012 at 8:14 AM, sebouh00 <sebo...@gmail.com> wrote:
> I would like to save the altitude in my app and use it to check if the
> device is at the same altitude in the future. Using GPS will not be
> applicable because of minimal power usage restrictions in my app.

What tests have you run to determine that the barometer is
sufficiently lower power than the GPS radio? I suspect it is, but I
have never tried testing the scenario.

> Would it be possible to do such a thing?

IMHO, not reliably. If you are trying to get altitude accuracy +/- 500
meters or so, perhaps.

http://en.wikipedia.org/wiki/Atmospheric_pressure
http://en.wikipedia.org/wiki/Altimeter

Moreover, none of this has anything to do with Android, and it smacks
of premature optimization, unless you have already implemented the
GPS-based solution and proven that the power consumption is over your
budget.

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Mark Murphy (a Commons Guy)
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http://commonsware.com/blog | http://twitter.com/commonsguy

In questi siti web puoi chiedere o rispondere a domande relative allo
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