[Digikam-users] What GPS data should be written to a master file so Digikam will recognise it?

[Jean-François Rabasse]

Hello Iain,


On Mon, 4 Jun 2012, Iain Wood wrote:

> I know it is possible to do this, as pictures exported from Aperture do
> appear correctly in the metadata and geoloction tabs or on the map.
> Unfortunately this only works for exported versions. Exported masters don't
> appear in the metadata and geolocation tabs or the Map...

I'm not sure to know what you call "exported versions" vs. "exported 
masters"...

But, I geotag pictures from command line, using exiftool too.
(For me, the reason is silly but my Digikam version has a broken geolocation
dialog that can't use Google maps. And I need Google maps, so no other way
than copy/paste coordinates between a web browser window and a command line
tool.)

My script uses exiftool and sets the following :
  -gps:GPSLatitude=... -gps:GPSLatitudeRef=North
  -gps:GPSLongitude=... -gps:GPSLongitudeRef=East
  -gps:GPSMapDatum=WGS-84

I added the MapDatum (though WGS-84 should be implicit) because with only 
coordinates and coordinates refs, it didn't seem to work. Perhaps you
should try...

And images tagged that way are valid under DK, and appear on the map folder.
But after tag, I need to select images and issue a « Reread metadata from
images ».

Don't know if this could help you in your case, but I can assert geotagging
with exiftool works.

Regards,
Jean-François


PS: here is my script
--
#!/bin/bash
# Set GPS position
# This script will be used to geotag an image from a Google Maps
# position, using cut/paste.
# The Google Web service will display position as Latitude,Longitude
# This will be mouse copied, then pasted on a command line using this
# script; e.g.  setgps <pasted-value> <image-file> ...

# Arguments
# ---------
GTAG=$1
shift
if test ! -f "$1"
then
     echo "Usage: $0 <position> <file> ..." >&2
     exit 1
fi

# Split Gmaps position
# --------------------
GLAT=`echo $GTAG | sed 's/,.*$//'`
GLON=`echo $GTAG | sed 's/^.*,//'`

# Update files
# ------------
while test -f "$1"
do
     exiftool -gps:GPSLatitude=${GLAT} -gps:GPSLongitude=${GLON} \
         -gps:GPSLatitudeRef=North -gps:GPSLongitudeRef=East \
         -gps:GPSMapDatum=WGS-84 \
         -overwrite_original $1
     shift
done