[OSM-talk] Azimuth measurement

[Hamlet]

On Tue, Apr 8, 2014 at 3:14 PM, Martin Koppenhoefer
<dieterdreist at gmail.com> wrote:
>
>
>> Am 08/apr/2014 um 11:45 schrieb François Lacombe <francois.lacombe at telecom-bretagne.eu>:
>>
>> Common devices like smart phones carry compass captors, used by compass applications.
>> These captors only sense the magnetic north to determine the azimuth of the device. The magnetic north is continuously diverting from the geographic north.
>
>
> on iPhones you can change this in settings (geographic vs magnetic north) not sure for other devices but my guess is there will be settings as well...
>
For the two Android I ever used, the compass is useless for more than
N-S-E-W orientation.
You can get data precise to the degree, but even with phone lying on a
table, with nothing metallic moving around, it's fluctuating,
sometimes more than 50 degree about.
Worthless in my opinion.

-- 
Hamlet