GPSPhotoLinker can be used to save location and GPS position data to a photo. The latitude and longitude recorded by your GPS unit while you were taking photos can be linked, and saved, to the photos. GPSPhotoLinker automatically enters the city, state, and country annotations into the metadata.

Look at this slide show example of one possible use for GPS photo linked photos.

Check out the companion application MapThePhoto which lets you map a geolocated photo from anywhere in the finder with a simple right click.

With Spotlight in Mac OS X 10.4, you can instantly search for the city, state and country information automatically saved by GPSPhotoLinker. Additionally, Mac OS X 10.4 does support the GPS metadata tags in photos. This will open up a whole realm of opportunities for users and developers to take advantage of the position data on photos.