- Download the CHDK software from chdk.wikia.com and load it onto an SD card. Put the card in your Canon camera and boot it with the new firmware, which will let the camera automatically snap pictures at regular intervals.
- Download and install the script (from popsci.com), which lets you set the interval for shooting.
- Set your GPS to begin logging a "track."
- Mount the camera on your dash (with shot settings on Auto), pointed at the roadside over your hood, and go for a scenic drive.
- Download the GPS log file and the pictures to your computer. Open the geotagging software. Load the pictures and the GPS log file, and tell the software to perform its geotagging magic. If you'd like to see your trip plotted on a map, use the software's "export to Google Earth" function. By modifying a few settings, you can also have pictures automatically placed on a map when you upload them to Flickr.