Often there are two names «GPS-receiver" and «GPS-navigator" Usually, the navigator refers to more sophisticated devices that deliver high-quality screen and an abundance of navigation functions, while the receiver can only calculate the coordinates. Appointment of the positioning accuracy on the map embedded in the device, you can find the ultimate goal of his movement. The possibility of paving the route of their movement trajectories Record opportunity to celebrate the waypoints required items: gas stations, traffic police posts, dangerous and emergency road sections, motels, roadside cafes possible to calculate velocity, travel time, time stops, average speed, average speed, taking into account stops, etc. Chip Special attention should be paid to how the chip is equipped with navigation, since the algorithm calculate the coordinates to a large extent on the quality of the device. One indication of a good chip is the large number of channels that can receive information simultaneously from multiple satellites. At the moment, most good receivers have 12 channels, but there are navigators, with 20 channels of reception. Of power embedded processor speed depends scrolling and zooming the map. Waypoints in memory is stored as a sequence of control points. If they are connected straight line segments, then we just get the route, which runs the unit (track). If the route has a complex curved shape, then you need a lot of points to a line of straight line segments reflect the real curve. Therefore, the greater the number of points that can operate with one or another model, the more routes of varying complexity to it is available. Attention is drawn to the number of points in a track - than their bigger, the length can be memorized path. Useful for this parameter as the number of tracks stored (usually 10-15). Maps for mapping devices the most important parameter is the size of memory. More convenient if the device has a connector for memory cards. In this case, there are no restrictions on volume, it is more convenient to store and change, record (download cards available at high-speed card reader) card. A little-known option - the number of supported cards. When recording a card inside of some appliances, there is one trouble - when rewriting card required internal card is erased, but it's not always convenient. Additional memory Built-in memory receiver is often unable to accommodate all the necessary maps, besides the quality of their display may not be very good. Therefore, the presence of the possibility of using flash cards eliminates the problem of a lack of memory. When storing the maps on the flash card, not erased initially loaded into the receiver's card. This is a clear advantage over the devices, which are pumped into the card. Built-in electronic compass to determine direction of the usual the GPS-receiver to the movement - the only way he can determine the compass (comparing the coordinates of the two spaced points). While the built-in compass can show the compass, even when rotated around its own axis. Screen color display easier to use, however, and monochrome screens with four grayscale display graphics in high quality. It consumes less power and is visible in bright sunlight. Attention is drawn to the screen, the scroll function, in its absence can not be moved around the screen traversed by the track. To view the entire track is necessary to reduce the scale, and this, with a large number of points leads to litter the screen and the inability of the inscriptions see the track. The larger the screen resolution, the more accurate the information is displayed. The availability of rotation of the image on the screen can display information in both horizontal and vertical position of the receiver. Owners of PDAs and laptops is worth paying attention to the GPS navigation set-top boxes. They work in conjunction with a PDA or laptop. Such GPS navigation on their own can not work, but are cheaper / housing for people involved in active leisure activities is preferable sealed enclosure that protects against impact and moisture. Improved antenna reception is possible by connecting an external antenna. Not all receivers have this option. For use in the car it is especially important because the metal absorbs radio waves, and inside the machine operation is difficult. In addition, when all things being equal navigator with a remote antenna (advocating for the housing) works better quality of his brother with an integrated antenna. Interface for connecting an external device interfaces can be very different - from the standard com-port or USB, to wireless Bluetooth. To work with a laptop and, in particular, with the CCP, you need CF or SD slots. Powered devices run longer with the four elements of "AA", but modern technology allowed, and on two elements to achieve good results (up to 30 hours rabloty). Accessories Above all, this cover that protects the screen from scratches. Mount for car or bike. Here we must pay attention to the convenience and security of attachment. Motorists simply need an external antenna for normal GPS navigator. Interface cable for PC connection. Included most GPS navigators, but may be absent. Powered by car cigarette lighter.
No comments:
Post a Comment