Data processing: vehicles – navigation – and relative location – Navigation – Employing position determining equipment
Reexamination Certificate
2000-04-28
2001-11-27
Beaulieu, Yonel (Department: 3661)
Data processing: vehicles, navigation, and relative location
Navigation
Employing position determining equipment
C701S212000, C701S025000, C073S17800T, C340S988000, C340S990000, C340S995190, C342S357490
Reexamination Certificate
active
06324471
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a map-information display system used by a movable body for retrieving map information from a recording medium and displaying the retrieved information.
2. Description of Related Art
A map-information display apparatus for retrieving map information of a certain area and displaying the information is disclosed in Japanese Patent Laid-open No. Hei 7-73396. The map-information display apparatus retrieves map information of an area required by the operator and displays the information.
When retrieving, for example, map information regarding a route which is specified by the operator and which includes a detour; the apparatus retrieves map information in the vicinity of the detour. However, the apparatus also retrieves unnecessary map information encircled by the detour. This inevitably causes a large amount of retrieved map information. In addition, if the amount of retrieved map information exceeds the capacity of a storage medium employed in the map-information display apparatus, an inability to accommodate the retrieved map information in the storage medium can occur.
SUMMARY OF THE INVENTION
It is thus an object of the present invention addressing the problems described above to provide a map-information display system used by a movable body for retrieving proper map information according to a route having been passed through by the movable body and a route to be traveled by the movable body and for displaying the information.
The map-information display system provided by the present invention for use by a movable body includes a coordinate-information generation means for generating coordinate information of positions on a route having been passed through and a route to be traveled by the movable body on a map; a limited-area map-information generation means for generating map information of a limited area by retrieving the map information of only the limited area based on the coordinate information of positions on the routes from map information which includes road information and is stored in a storage medium; and a display means for storing and displaying the map information of the limited area, wherein the limited-area map-information generation means comprises: a route generation means for generating a route for the movable body based on the coordinate information of positions on the route and the road information; and a retrieval means for converting banner-like shaped-area map information, that is, map information of an area with a shape resembling a banner stretched along a route to be traveled by the movable body, into the map information of a limited area.
In the present invention, the map information of a banner-like-shaped area stretched along a route to be traveled by the movable body is stored as map information of a limited area so that it is possible to retrieve proper map information according to a route having been passed through by the movable body and a route to be traveled by the movable body and to display the information.
Further scope of applicability of the present invention will become apparent from the detailed description given hereinafter. However, it should be understood that the detailed description and specific examples, while indicating preferred embodiments of the invention, are given by way of illustration only, since various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the all from this detailed description.
REFERENCES:
patent: 6064941 (2000-05-01), Nimura et al.
patent: A7073396 (1995-03-01), None
Katayama Mutsumi
Morita Hiroyuki
Beaulieu Yonel
Birch, Stewart, Kolasch and Birch LLP
Honda Giken Kogyo Kabushiki Kaisha
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