Realizing car navigation is closely related to geographical location information. Geographical information system GIS is a technical system that comprehensive processing and analysis of space data, which can organically combine geographical location and related attribute information. Traffic information is usually divided into two types: static and dynamic. The former refers to traffic information that does not change with time or smaller changes, such as roads, parking lots, and traffic accessories. Accidents, weather changes, vehicle density and traffic. Geographical information system GIS can be coordinated by the entire system as an information platform, which can manage the above static and dynamic data, and require seamless integration.

　　Electronic maps are a visual product of the geographic information system. Most of the functions of geographical information can be clearly available on the display with digital signals and analog signals. The traffic route and surrounding environment can communicate with the driver in the form of visual and auditory. Essence The Beijing Siwei Testing Technology Corporation has successfully produced the DVD map software of the "Vios" car, creating a precedent for China's vehicle electronic navigation; Shanghai Changxiang Computer Co., Ltd. cooperates with the world -renowned Panasonic Group and Toyota Motor Company. It successfully completed the production of three -dimensional three -dimensional, high -quality, and fine car navigation electronic maps of 1: 2500 three -dimensional three -dimensional, high -quality, and finely carnival. The ministry, Shanghai Sanji Electronics Engineering Company, which undertakes the national "automotive navigation product", cooperates with dozens of backbone technology companies such as Beijing Hezhong Sizhuang Company, which cooperates with the world's largest navigation device manufacturer to develop the "Ren We" car navigator.

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