GPS Essentials - App Regards Lene
-----Oprindelig meddelelse----- 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 =========================================== _______________________________________________ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user _______________________________________________ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user