Geocaching is a game for users of Global Positioning Systems (GPS). The idea is that people set up caches all over the world and GPS users enter waypoints into their systems in an attempt to locate the caches. The cache may be filled with rewards that are available to the player once he or she has found the cache. Rewards include books, CDs, maps, etc. After receiving a reward, the player must...

The Federal Aviation Administration maintains the graphically impressive Global Positioning System (GPS) Basics Web site. From the history of the global positioning system and how it works to governmental policy that controls its use, this site does a good job of explaining all facets of what GPS is about without being overly technical. Interested visitors can explore some of the other links that...

This website on GPS Drawing was created by Jeremy Wood and features his artwork and a few other GPS artists. The drawings posted in the Gallery "are of journeys captured using GPS receivers" and "were created by treating travel like a geodetic pencil or a cartographic crayon." He has created images of animals and objects through travels by foot, boat, bicycle and plane. The project is also meant...

This tutorial is part of WebPhysics, a site "devoted to teaching and learning physics with World Wide Web technology." The first lesson teaches visitors about orbital mechanics. The second and third lessons delve into the theory and science that make global positioning satellites a reality. Each of the three lessons contains sections on Exploration, Application, and Theory. The clearly articulated...

The Global Positioning System (GPS) has been in operation for several years, and its use is continually rising. GPS is the main satellite navigation system developed by the United States. There are countless applications of this technology, and numerous international efforts are currently underway. The Topcon Positioning Systems company provides an excellent introduction to GPS technology in...

The Global Positioning System (GPS) is a very popular and useful tool, whether you're navigating on a long hike or just driving through an unfamiliar town. A good tutorial that introduces the basics of the technology is found on the Web site of a leading GPS company, Trimble. It starts by describing the underlying concepts of GPS and how it compares to other positioning systems. Then, the...