DxO changes when outputting DNG are destructive, i.e. they will actually modify the content that your original NEF image had rather than simply adding processing instructions. Thus, the resulting linear DNG is actually a totally new file, just like you were exporting to a TIFF or JPG. This may be the reason why your metadata is not fully preserved and it may well be that your geotagging information is lost on the way.

However, there is a way to use ExifTool to fix it. Look at the copying instructions at the ExifTool documentation page and simply transfer the metadata from your original geotagged NEF files to the DxO-created DNG files.

I have not tried this with your setup, but I trust Phil Harvey’s work. Try it on a set of test files first, to be sure. And let me know if it worked :-)

Klaus

The question is:
We use Nikon (D3) with the GP-1 gps and run the NEF files through dxo.com, to fix lens faults. When the dng file is ready the gps info is gone! How to set up a Automator Script file to get the info back again and maybe into the IPTC?
When selling to stock agencies I know that they want to know exactly where the image is taken. I had the question a two years ago with an image taken in Tivoli, Copenhagen. (I sold the image)

Maybe you can have a look at it?

from Norway
Trond Hillestad