[Qgis-user] Android Camera App with compass bearing

[Randal Hale]

Hopefully this isn't going too off topic - so last year found me in the 
Caribbean working on an addressing project.

I ended up using the Fulcrum app (not free) but it's really really good. 
I used it in conjunction with QGIS and PostGIS. Everything is stored in 
the "cloud" and you can download it in just about any format.

Take a look at this: http://fulcrumapp.com/blog/viewing-photo-metadata/ 
it seems as though it now is collecting direction (I need to go test this).

Randy


On 11/05/2014 08:39 AM, Zoltan Szecsei wrote:
> 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:    +27-86-6115323www.geograph.co.za
> ===========================================
>
>
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-- 
-----------------
Randal Hale
North River Geographic Systems, Inc
http://www.northrivergeographic.com
423.653.3611 rjhale at northrivergeographic.com
twitter:rjhale     http://about.me/rjhale
http://www.northrivergeographic.com/spatial-connect

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