发明名称 |
Onboard navigation device for automobile |
摘要 |
The navigation device (1) uses map data received via a communication link from an external information center (100) and entered in a map data memory (7), the amount of use of each stored map data evaluated, for automatic selection of the least used data for erasure and replacement by new map data. Alternatively the selected map data may be compressed to release memory storage space for the new map data.
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申请公布号 |
DE19837617(A1) |
申请公布日期 |
1999.03.04 |
申请号 |
DE19981037617 |
申请日期 |
1998.08.19 |
申请人 |
TOYOTA JIDOSHA K.K., TOYOTA, AICHI, JP |
发明人 |
HARADA, TOMOYASU, TOYOTA, AICHI, JP |
分类号 |
G01C21/00;G01C21/32;G08G1/0969;G09B29/10;(IPC1-7):G09B29/10;G06F19/00 |
主分类号 |
G01C21/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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