Need directions? Are you good at getting lost? Then G.P.S. is just the technology you've dreamed of, and G.P.S. For Dummies is what you need to help you make the most of it. If you have a G.P.S. unit or plan to buy one, G.P.S. For Dummies, 2nd Edition helps you compare G.P.S. technologies, units and uses. You'll find out how to create and use digital maps and learn about waypoints, tracks, coordinate systems and other key point to using G.P.S. technology. Get more from your G.P.S. device by learning how to use Web-hosted mapping services and even how to turn your cell phone or P.D.A. into a G.P.S. receiver. You'll also discover:*Up-to-date information on the capabilities of popular handheld and automotive Global Positioning Systems*How to read a map and how to get more from the free maps available online*The capabilities and limitations of G.P.S. technology, and how satellites and radio systems make G.P.S. work*How to interface your G.P.S. receiver with your computer and what digital mapping software can offer*Why a cell phone with G.P.S. capability isn't the same as a G.P.S. unit*What can affect your G.P.S. reading and how accurate it will be*How to use Street Atlas U.S.A., TopoFusion, Google Earth and other tools*Fun things to do with G.P.S., such as exploring topographical maps, aerial imagery and the sport of geocaching Most G.P.S. receivers do much more than their owners realize. With G.P.S. For Dummies, 2nd Edition in hand, you'll venture forth with confidence!. --Provided by publisher.