With GPS, your car PC can always know where on Earth it is, and with wireless Internet, it can also tell the world.
The Global Positioning System (GPS) provides fairly accurate (to within a few meters) location coordinates for anyone who has a GPS receiver. GPS receivers come in a variety of shapes and sizes, from standalone units with LCD screens showing your location in latitude and longitude, to units with a little map and an "X" marking where you are. The GPS hardware and antenna can be made smaller than a matchbox, and you can purchase tiny CompactFlash-sized GPS receivers for PDAs, or small USB dongle receivers for PCs (see Figure 6-10).
Figure 6-10. A USB GPS receiver
Knowing exactly where you are can be useful for many different applications, and recording everywhere you've been can be even more useful. Maybe you run a business with a fleet of automobiles, and you want to be able to store your routes on a daily basis and improve efficiency by examining exactly where you went. Or maybe you're going on a cross-country trip and you want to keep a journal of your travels. Why not include the coordinates of the path you take?
Even better, you can upload your coordinates to a web page as you travel, so others can keep track of your vehicle in real time. This feature can be used for people to monitor your progress while you're making a trip, so you can ...