Nikon GP-1A GPS Unit For Nikon DSLR Cameras (27034) Geotag (image positioning information of pictures such as latitude, longitude [Geodetic System WGS84]) can be added to the image. Correlation between pictures and maps is supported by GPS function in conjunction with ViewNX version 1.2 software and my Picturetown. Compatible With (When using the GP1-CA90 Cable): Nikon D5000, Nikon D5100, Nikon D7000, Nikon D90