Four Points To Consider When Buying A Gps Devise

To make the right choice from all of the various GPS systems available in today's market, it is necessary to have a practical understanding of what they offer, and what the user can expect from the device. A good place to start is by reviewing the major components.

1. The receiver (or antenna). GPS receivers use signals from satellites which orbit the Earth at known positions. Each satellite has its own identification code and sends a signal which the GPS receiver can use to calculate the distance from the device to that satellite.

2. That portion of the system which uses the received information to estimate where the device is located on an internal map.

3. The various capabilities for route mapping and recording, which vary from system to system, depending on your intended use.

4. And finally, the display portion (which can vary considerably from limited location information to full color three dimensional maps of the immediate surroundings and advised route).

Recognizing that all GPS system are based on the same principle, it is a good idea to at least be aware of the underlying technology so that you can make an informed decision when choosing which system you want to invest in. Without becoming overly technical, GPS units use standard triangulation. By using 3 to 4+ signals, the device finds the point in space at which the spheres representing the distance from each satellite intersect. This allows the device software to estimate its own position by finding that spot.

This location information, allows the software to then pinpoint the device's location on a map, and use the information for a number of operations, from simply displaying the location, to mapping a proposed route to travel.

You can break down the types of GPS systems into three classes; road, hiking and maritime. Each class is further subdivided into other types which offer different features depending on the users intended use and the environment within which they will be operating. What is important to remember is that this technology does not allow for the transmission of actual mapping data via the satellites. It is purely concerned with identifying the location of the device.
Identifying your exact needs and expectations regarding your device is the first step. Once you have clarified this you are ready to assess your options and make a sound purchase.

By: Brad Timinsky

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Brad Timinski is owner of GPS City, and offers gps mount available with unmatched on-line store experience. With over 20 years of direct engineering, marketing, and customer service experience in the GPS industry, he is uniquely qualified to offer top-level customer service and support. GPS City sells to thousands of customers in Canada, the USA, and worldwide.