Treasure Maps creates a photo slideshow that can be viewed while an animated Google Map shows the location of each picture. As the slideshow plays a trail map is created from where the photos were taken.
Treasure Maps is a Python-based application that combines Google Maps, geotagged images from Picasa web albums and GPX files to create a slideshow of geotagged images using Google Maps. The code is available under the GNU General Public License v3.
The code is hosted at Google Code. Here are some examples of Treasure Maps in action: