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Sumitomo electric's navigation systems for private automobiles

The recently developed navigation systems discussed in this paper include location detection using map-matching, map display, and improved man-machine interface functions, and are contained in a stand-alone system installed in passenger cars. The newest system uses a fiber optic gyroscope as a rotation rate sensor, and improved map-matching method to get high accuracy. As to driving guide information, the system can display road information from road side radio beacons, and can play CD-ROM discs based on CDCRAFT which is proposed in Japan as a common standard of CD format and application program for navigation systems.