How to buy GPS device

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Buying GPS

A GPS (Global Positioning System) receiver uses satellite information to pinpoint your exact location. While this is extremely accurate, many things can cause the system to falter.The gyroscope helps maintain tracking information through turns and twists, and the vehicle speed sensor fills in the gaps when the satellite signal is lost.

Location information is then superimposed on the maps stored on discs. The detailed map information is stored on either a CD or DVD, with more than just streets and exit numbers. Many systems have business addresses, so you can enter a name and the system will direct you to it.

Determine GPS Device for You

Car navigation system
If you’re planning on using your GPS to get you from point A to B in your car then car navigation system is for you.Many provide voice directions so you can keep your eyes on the road, and also include touch screens, and geographical options.


Portable outdoors unit
This is lightweight GPS device .you can take your GPS device everywhere with you.This handheld GPS units can fit in your pocket




Marine system
Marine GPS devices designed for use aboard marine vessels and watercrafts boast a rugged waterproof design and may also float.These units are specifically designed to be on and around water.

PDA/GPS hybrid.
This device offers a good combination of the auto GPS system and handheld device.Many of these cell phones offer turn-by-turn directions like most GPS devices, and generally have a smaller form factor.this became more popular in very short time.

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GPS Features

GPS systems can vary greatly in how and what they do. Some simply tell you where you are.you must check so parameter like Accuracy,Interface options ,Maps , Data storage ,Combination GPS units,Weather resistance which are responsible for device efficiency.

Price

This information can be placed over an extremely detailed map, or it can be a simple latitude/ longitude number. Of course, the more detailed information you need, the more cost you have to pay.
GPS is available in different ranges of prices. What are the price that they have is with characteristics differences. These prices are decided what criteria are taken into account while purchase .

Screen size

The rule is simple thing is the more expensive, the more readable and more for convenience. But might be the less transportable. If the models of 3.5 inches (8.9 cm) held easily in a large pocket ;forget the pockets of trousers ,from 4.3 inches (10.9 cm) are rather uneven in thickness.

recently the 4.7-inch (11.9 cm) and some models more than 5 inches (12.7 cm) appear on the market. Today, the entry level is 3.5 inches, and the rest at 4.3 inches. The few models that exceed this size are not yet the level of performance of their "little brothers".

Navigation Software

With years of experience gained by manufacturers, most major brands now offer reliable software that the driver always lead to a successful conclusion. The voice and video are clear and intelligible. Trademarks TomTom, Mio, Garmin and Navigon reign on the industry with a large dominance of the first who wins more than 50% of the market.

These are the additional features that distinguish real differences registered models (Text-to-Speech, Traffic Info, a network connection to retrieve various information ...).

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The Text-to-Speech

It is a system that allows the GPS to pronounce the names of streets or avenues to take. It is usually offered from mid-range. His interest is certain: it lets you know which street to take without even having to read his name on the screen. We must not confuse the "Text-to-Speech" or TTS with the pronunciation of voice instructions that offer absolutely all GPS ( "turn right", "at the roundabout take the second exit". ..).

The info-traffic
The info-TMC traffic uses radio waves to receive traffic information. The GPS can adjust his route traffic report. TMC is available in two versions. A standard, which takes into account that a few highways and main roads, and a premium version that includes the same data by adding those of the main streets of some large cities. it can make you avoid a major outlet for you to go through an area not covered by the TMC, and even more bite than it prevents.

The mapping
When it becomes European coverage can range from 22 to over 40 countries. But beware, some countries, particularly in Eastern Europe, are not always fully covered. Only the main points are listed. The same GPS usually costs 50 to 75 euros more for a move from "France" to a "Europe".

Bluetooth hands-free
The compatibility of a Bluetooth GPS is an indispensable element to enjoy the hands free for driving. We must of course have a phone compatible with this standard to connect to GPS. Thus, the phone can stay in the pocket, and calls are made directly via the GPS box with both hands on the wheel.



Multimedia software
MP3 player, video player, photo album, services are included in some models. Their utility is not required for the driver, and of course incompatible with driving. We can not recommend to include in the criteria for purchase.

In addition, GPS video players are particularly difficult with the formats of video files, and usually require recompression of the entire video. A tedious job for a result that is not worth the candle. Do not use as portable video.