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United States of America Patent
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-
Mar 12, 2002
Grant Date -
N/A
app pub date -
Mar 19, 2001
filing date -
Mar 19, 2001
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A travel state monitoring unit monitors whether the vehicle position deviates from a road so as to be in the off-road travel state, on the basis of the map information and the vehicle position. When the vehicle position is in the off-road state, a travel trail generating unit generates off-road travel trail data and stores the data in an off-road travel trail storage unit. A display control unit displays, by the user's instruction, the off-road travel trail superimposed with the map, using the off-road travel trail data. The route search unit searches a route to an off-road point and displays the route.
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