Road map information readout apparatus, recording medium and transmitting method

Road map information used in a vehicle navigation or the like is classified into main road groups comprising roads having a high frequency of utilization for route searching processing or the like and minor street groups comprising roads having a low frequency of utilization. Information relating to...

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Bibliographische Detailangaben
Hauptverfasser: IHARA, YASUHIRO
Format: Patent
Sprache:eng
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