Map display unit
AssigneeJATCO Ltd
InventorShinichi Hasegawa
Life of this patent
Estimating the term…
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.
Claims11
A map display unit comprising:
- position detection means for detecting its present position;
- storage means for storing map information on various scales including a predetermined map on a predetermined scale which must overcome a barrier in order to move out of said predetermined map;
- extraction means for extracting map information including said present position detected by said position detection means from said storage means in accordance with a predetermined extracting rule;
- display control means for synthesizing a mark representing said present position and the extracted map information and then displaying them on display means;
- and
- set means for setting said extracting rule;
- wherein said set means 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.
A map display unit comprising:
- position detection means for detecting its present position;
- storage means for storing map information on various scales;
- extraction means for extracting map information including said present position detected by said position detection means from said storage means in accordance with a predetermined extracting rule;
- display control means for synthesizing a mark representing said present position and the extracted map information and then displaying them on display means;
- and
- set means for setting said extracting rule;
- wherein said set means 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.
Dependencies are inferred from the claim text.