feature request : geotagging without overwriting location

[pierrelabreche]

Scenario
Many camera models allow images to be geotagged directly in the camera. Some cameras have a built-in satellite navigation system, while others rely on a companion application in a phone that can add geotags to image files.
It can happen that an image folder contains a mixture of geotagged and non-geotagged images, simply because the user has sometimes forgotten to activate recording by the application.

Documentation
The possibility of overwriting geotags could be documented. Is is possible to add geotags only to images that are not already geotagged ? If so, This should be covered in the help documentation.

Possible new feature and user interface
An explicit option "no geotag overwrite" would disable geotagging any image that is already geotagged.