Is there a command for adding gpsdatestamp and gpstimestamp from
The image taken time offset by the timezone
Yes. See GPSDateStamp and GPSTimeStamp in the GPS Tags documentation (https://exiftool.org/TagNames/GPS.html) for an explanation.
- Phil
How do I offset the time zone
If the tag you are copying from already has a time zone (ie. FileModifyDate), then you are good to go.
Otherwise, you can add the time zone like this:
exiftool "-gpstimestamp<${createdate}-04:00" FILE
- Phil
Thank you
exiftool "-gpstimestamp<${createdate}-04:00" DIR
Would this be correct if I wanted to apply to a whole directory.
Yes. FILE may be one or more file and/or directory names. Add -r to also process subdirectories if a directory name is specified.
- Phil