GPS devices explained

If you are new to the world of GPS devices then there are probably a few pieces of information that you will need before you try to choose from all the various available models and manufacturers. In fact, GPS devices are a reasonably new phenomena, and have only recently hit a price point which is within reach of the leisure market. Previously, they were only found in military applications, and expensive in-car navigation systems.

GPS devices work by taking signals from up to 12 satellites, and using the range from them to the unit as triangulation points, enabling them to be very accurate and pinpoint the units position, either for display to the user to plot on a map, or using an internal mapping display.

Those GPS devices with built-in maps are still at the top end of the market, and also tend to be slightly larger than their handheld counterparts, except in certain, high price models. Whether it is worth the extra investment rather depends on what the end user will be doing with the unit.

There is another technology, known as WAAS, Wide Area Augmentation System, which uses terrestrial signal sources to improve the GPS devices accuracy to within 3 feet of reality. Such is the popularity of this system, that it is being included on medium to high range leisure units as well as those aimed at more advanced users.

Finally, if the end user intends to use a portable GPS for trekking and walking, then choosing one of the GPS devices with PC connectivity will increase the potential of the unit immensely.

For more information on related products and services, please choose from the following menu of items.

GPS
Maps / Software
Tracking

About The Author:

Guy Lecky-Thompson is a successful author and publisher at www.1st-at-gps-tracking.com. Recommending gps equipment and associated products
23-06-04