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The original car navigation systems, installation of Genuine electronic map, the navigator or the wrong way. Navigator "blind navigation", ranging from the wrong way, the weight will cause traffic accidents. Please pay attention - "Once the navigator over the intersection to remind me of the turn, which led me around half an hour." Chongqing, Lin complained to the author. The Changchun Andrew said they used mobile phone navigation software there had been the sudden disappearance of the map. Lin used the embedded navigator is pre-installed in the car Ki phone software is to spend money download from APPStore, genuine, not unsolicited cottage products. Why navigator such a situation Map updated to keep up with urban construction It is reported that the main reason of the navigator error is to use the cottage navigator pirated electronic maps. Does have a lot of unsolicited cottage navigator using pirated maps, caused great distress to the consumer. But in fact lead to the navigator error some unknown reason. Responsible for the production of Ritu Information Technology Co., Ltd., a vice president told the author, navigator production about three steps: First, the mapping of the map, including roads, points of interest in the field collection, the corresponding database; software for data conversion into the format required, so as to facilitate the search for destinations, calculating the path; Finally, there is a combination of software and hardware, carrier navigation. Although the GPS navigation device called the GPS, in fact, in addition to satellite positioning, but also to the many technical, one of the most critical is the GIS geographic information system, database creation and calculation of the path associated with it. The database path is based on the map, the map is the key in the key. "Navigation electronic map is almost covers every town, usually two to three years, a large-scale information collection, will be adjusted based on feedback from users and dealers," the vice president said, "but plans to keep up with changes to the face of rapid urban construction, the update of the information lag in fact is a normal phenomenon. " GPS is a space satellite navigation and positioning system, the 1970s, jointly developed by the U.S. armed forces could have been military, and Japan in the late 1980s, first used in car navigation. The GPS is composed from three parts of the space satellite, terrestrial monitoring and users receive, while the navigator is equivalent to a GPS terminal, you need to transmit and receive signals to the positioning, navigation, and therefore there will inevitably be errors in positioning. Positioning errors, including the receiver internal errors and external mutations error. The former is inherent errors caused by the satellite receiver, mainly satellite data errors,Main products: car dvd player, car gps and car dvd are with good quality. data transmission error, the receiver measurement error, fixed-point measurement according to the scientists for a long time, the majority of pseudo-code in the normal state of GPS receiver's internal fixed error of 95% in less than 20 meters. It is inevitable, only to minimize errors. High-end GPS navigator, and professional navigator error should be smaller than ordinary navigator, but for the average person, this error is acceptable.
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