As a pilot I have used GPS for navigation in my plane since 1998 (starting with a Garmin GPS195). During the last year, I discovered you can use tools to document your flight by saving your GPS flight log to your computer. One tool I found particularly nice is called GPS Visualizer (at www.gpsvisualizer.com). The picture at the right (click the picture to see larger) is an example of a flight I made shown in GPSVisualizer. The color of the track represents altitude.
I’ve shared GPSVisualizer’s capabilities with other pilots (oh, it’s also good for all kinds of other GPS activities by the way), but after seeing Google Earth I immediately wanted to try my flight tracks in it as well.