<para>
- This format reads GPS information embedded in
- <ulink url="http://www.exif.org">EXIF </ulink>,
+ This format reads and writes GPS information embedded in
+ <ulink url="http://www.exif.org">EXIF</ulink>,
the Exchangeable Image Format, data. EXIF is a standardized method
of encoding data in pictures such as JPEG, TIFF, and WAV and is frequently
used by mobile phones with cameras, cameras with built-in GPS.
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+<para>
+ Frame means the maximum time difference that we accept between the EXIF time information
+ of a picture and the timestamp of a track-, route- and waypoint used for tagging.
+ Without this option the maximum time frame is 10 seconds.
+</para>
+<para>
+ <userinput>gpsbabel -i gpx -f holiday.gpx -o exif,frame=60 -F IMG0784.JPG</userinput>
+</para>
+<para>
+ If the camera time wasn't adjusted, you should move the track(s) by the this difference.
+ I.e. if the camera time is five minutes behind your time, the track(s) should be shifted
+ five minutes back.
+</para>
+<para>
+ <userinput>gpsbabel -i gpx -f holiday.gpx -x track,move=-5m -o exif,frame=60 -F IMG0784.JPG</userinput>
+</para>
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+<para>
+ When you specify a name with this option we're looking for a waypoint
+ with this name. And, if found, the GPS information of this point is used
+ for tagging the image file.
+</para>
+<para>
+ <userinput>gpsbabel -i gpx -f holiday.gpx -o exif,name="On the beach" -F IMG0786.JPG</userinput>
+</para>
+
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+<para>
+ In the default case GPSBabel reads the output file (the file that should be
+ tagged with GPS information) and then creates a new file with an additional
+ .JPG extension. With this option in a final step the original file will be
+ deleted and the new file renamed as the original filename.
+</para>