Geotagging is the name for the process of attaching geographical location data to photographs, and then displaying them using a global mapping program. Two free programs available from Google, Picasa and Google Earth support geotagging, and the ATP Photofinder is compatible with these programs.
Picasa links directly to Google Earth, using it to display geotagged images.
The GPS data added to the image files by the Photofinder device allows images to be displayed on Google Earth's satellite image, keyed to the position in which they were taken.
In some cases the accuracy is extremely good, but other shots were inaccurately located, sometimes by over 100m.