[Qgis-user] Android Camera App with compass bearing

[Zoltan Szecsei]

Hi,
Thanks for the thought - but see orange text below: Does not write 
bearing into EXIF fields.
Regards,
Zoltan

On 2014/11/05 12:17, Lene Fischer wrote:
> GPS Essentials - App
>
> Regards
> Lene
>
> -----Oprindelig meddelelse-----
> Fra: qgis-user-bounces at lists.osgeo.org [mailto:qgis-user-bounces at lists.osgeo.org] På vegne af Zoltan Szecsei
> Sendt: 5. november 2014 07:02
> Til: tech at wildintellect.com; qgis-user at lists.osgeo.org
> Emne: Re: [Qgis-user] Android Camera App with compass bearing
>
> Hi Alex/All,
> Thanks for the thoughts - my comments interspersed with your.
>
> Kind regards,
> Zoltan
>
> On 2014/11/04 23:17, Alex Mandel wrote:
>> On 11/04/2014 04:55 AM, Zoltan Szecsei wrote:
>>> Hi,
>>> I need to do a field trip and take some photos.
>>> I've been googling around, but cannot find an app that will burn both
>>> GPS position _and compass bearing_ into either the image, or just the
>>> exif data for that image.
>>>
>>> Anyone got any experience in this need?
>>>
>>> Thanks & regards,
>>> Zoltan
>>>
>>>
>> Maybe, http://geopaparazzi.github.io/geopaparazzi/
>> "georeferenced and orientated pictures"
>>
>> And now my long rant before I remembered the above link...
> *I manually downloaded the latest version (newer than that on Play Store) and it still does not record bearing*  - even though the app does have a bearing tool.
> I checked the website and recording bearing into EXIF is not even on the developer's long wish-list I have emailed the developer, with a hope to at least get it onto the wish-list.
>> GPS data is an on/off toggle on most Android devices. Bearing does
>> appear possible according to the exif specs, but in practice is rare.
>> http://www.sno.phy.queensu.ca/~phil/exiftool/TagNames/GPS.html
> Yes, I checked that last night too - TAGs 0x0017 and 0x0018 relate to bearing info.
>> However I don't see any obvious apps for telling the phone you want to
>> capture that. I'm also not sure all phones are capable of calculating
>> bearing when not moving.
>>
>> So my suggested work around would be a GPS Logging application of
>> which there are several. Then you can pull the bearing calculation out
>> after the fact, if it was while moving.
> Sigh, nope.
> (In my kind of) Field trip data collection (& photography) often involves driving to a feature, leaning out the car window and taking a snap-shot, so recording moving direction will not help at all.
> Note that bearing accuracy is NOT that critical, it needs only to be reasonably indicative.
>> If stationary, you might need to write your own app which lets users
>> indicate which way they were facing when taking a picture. For someone
>> who's made an Android application I don't think this is hard.
>> http://developer.android.com/guide/topics/sensors/sensors_overview.htm
>> l Indicates all version of Android support the Magentic sensor.
>>
>> This example shows how to get the bearing from the API
>> https://www.codeofaninja.com/2013/08/android-compass-code-example.html
>> So GPS+Orientation+Camera should be all required.
> Yep, true, but the purpose of this thread is to see if this wheel has already been invented :-)
>> Kinda busts my GPS logging idea, since the bearing information comes
>> from a different sensor than the GPS it won't be in the NMEA strings
>> even if you captured them.
> What? You not 'hard core' enough to intercept the NMEA stream and insert "bearing-on-the-fly" by back-calculating the incoming coords?
> (Just pulling your leg - thanks for your interest in this topic :-) )
>> Thanks,
>> Alex
>


-- 

===========================================
Zoltan Szecsei PrGISc [PGP0031]
Geograph (Pty) Ltd.
GIS and Photogrammetric Services

P.O. Box 7, Muizenberg 7950, South Africa.

Mobile: +27-83-6004028
Fax:    +27-86-6115323     www.geograph.co.za
===========================================

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