Patent
Map display unit
Shinichi Hasegawa
- 24 Sep 1999
37
TL;DR: In this article, a map display unit is provided with a set uni that sets a rule for extracting map information from a storage device, such that a map on the largest scale having detailed information can be displayed, even if a map were switched.
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Abstract: A map display unit is provided with a set uni that sets a rule for extracting map information from a storage device. The set unit sets a first rule for most preferentially extracting map information on the largest scale and a second rule for most preferentially extracting map information on a specified scale. For this reason, if the first rule is set, a map on the largest scale having detailed information can be displayed, even if a map were switched. Therefore, the accuracy of route guidance can be enhanced by displaying a map suitable when passing through complicated geographical features or city. On the other hand, if the second rule is set, an arbitrary scale can be specified. For example, if a map on the smallest scale is specified, it can overlook a wide range of area and therefore the entire planed route can easily be grasped.
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Patent
Map display system
Kazunori Takanabe,Masaki Yamamoto,Kenzo Ito,Hiroshi Fujinami +3 more
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TL;DR: A vehicle map display system includes a control unit to manually or automatically display a reduced or enlarged map from a reduced map data storage device in accordance with the separating distance between the present position of a vehicle and a destination, on the whole or part of a display area of display device which is provided with a sub-display area as mentioned in this paper.
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