ExifTool for macOS - How can I enter GPS latitude & longitude?

[prettypixel]

I have recently started to use ExifTool for macOS, and have learned how to edit the datetimeoriginal exif information.

However, I have many images that I would now like to enter GPS latitude & longitude information for, and then upload to Google Photos. I would be grateful if someone could advise me on the commands necessary. For information, I know how to obtain latitude & longitude information from Google Maps. Thank you in advance.

[StarGeek]

Exiftool -gpslatitude=12.34 -gpslatituderef=N -gpslongitude=56.78 -gpslongituderef=W

The Ref tags are very important if the coords are negative (N S or W).

[prettypixel]

Thank you for the reply and instructions. I notice the example you gave me include very short latitude and longitude values. Mine are longer - is this OK? Please see below:

53.319629, -0.666803

Also, I don't know if the coordinates are negative or not - how can I tell? Thank you again 

[Phil Harvey]

I think that FAQ 14 will answer all of your questions.

- Phil

[prettypixel]

Many thanks Phil.