Please note that when the optional GPS five key elements

The GPS equipment, appraise the merits and demerits of the five important factors, this is all in the purchase GPS equipment compared to the five areas.

First, the keyword search.

Ordinary users are used by keyword search destination, and you have GPS navigation equipment needed to support regional division. Most navigation systems can be specified by the user in a province / city and provincial / city of a certain county, in the narrow scope of the search that will be able to reduce the search time and the situation is the most intelligent navigation systems can also search according to the results of distance from the vehicle in the distance sort. In addition to keyword search, but also a GPS navigation equipment did not provide the location of other search methods, methods, the more users the freedom to choose the higher.

Second, path planning capability.

Ideal state of GPS navigation equipment should be able to quickly calculate a destination directed at the road, generally within 50 kilometers in less than 20 seconds, less than 3,000 kilometers in less than 60 seconds. Road planning reasonable, it is not brain dead and only a quest Link road, a number of convenient cul-de-sac should also be considered in the area delineated as far as possible within not for the sake of road users.

Third, the real-time path amended.

In addition to the initial route planning capabilities, GPS navigation equipment encountered wrong path recalculation of the capacity is also very important, especially recalculated path time is the key, because the road complicated calculation if you do not timely and is likely to be correct path and Cashen have to continue to go wrong.

Fourth, the voice alerts.

Some of the voice broadcast navigation products very "stingy", remind you after 12 silencers, particularly in the sections on the implementation of this very obvious. A good GPS navigation equipment should be intermittent remind users to "place before the next prompts keep straight," and provide the traffic lights, radar guns and other regional information, navigation systems allow users to feel normal work.

five. - Found ability.

Most navigation systems now have a 20 channel receiver sensitivity SiRF star III chip with positioning accuracy, speed characteristics. GPS start in the first when usually takes about one minute can be successful positioning, the next hot start-up time is very short, only 12 to 14 seconds on it. Theoretically GPS navigation systems as long as they can receive the air three satellites, will be able to draw their own terms through which the current three-dimensional (longitude, dimensions and height) of the vehicle location information identified the specific coordinates.