Someone, who will remain nameless, has GPS Latitude where GPS Longitude should be, and vice versa.
Any chance of developing field swap/move functionality for nameless people who don't pay attention when they geocode?
exiftool "-GPSLatitude*<GPSLongitude" "-GPSLongitude*<GPSLatitude" /path/to/files/
I used a wildcard so both the main tag and the reference direction tag will get updated.