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
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Fra: qgis-user-boun...@lists.osgeo.org
[mailto:qgis-user-boun...@lists.osgeo.org] På vegne af Zoltan Szecsei
Sendt: 5. november 2014 07:02
Til: t...@wildintellect.com; qgis-user@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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