Kisgearth is a small perl script that gives you the ability to convert your Kismet xml logfiles to GoogleEarth kml files.
You can download it from the following link: https://packetstormsecurity.com/files/download/54939/kisgearth-0.01b.tar.gz
Source: https://packetstormsecurity.com/files/54939/kisgearth-0.01b.tar.gz.html