Geotagging only images without geo tags

[feklee]

If I only geotag images that are in a raw format, then I should pretty much be fine. Recent JPEGs on my disk are generally shot with a phone, and they have a geotag already. So I avoid geotagging them.

Still, I'm curious: Is there a simple way to prevent geotags from being overwritten during geotagging?

How I want to geotag:

Code Select Expand

exiftool -geotag "GPS_tracks/*.gpx" -ext arw -ext nef -ext sr2 -ext dng DIR
- Felix

[Phil Harvey]

Hi Felix,

I do it like this:

exiftool -if "not $gpslatitude" ...

- Phil

[StarGeek]

Would the -wm (-writeMode) option work as well?  With cg it will only create new tags and not write existing tags.
-wm cg

[feklee]

exiftool -if "not $gpslatitude" ...

Thanks, Phil, according to some tests that works well!

- Felix