JP3062377B2 - Route guidance method for navigation system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a route guidance method of a navigation system for displaying a guidance route to a destination on a map around the destination.

[0002]

2. Description of the Related Art Conventionally, a navigation system is configured, for example, as shown in FIG.
The radio wave from the S satellite is received, the current position of the vehicle is derived by the position detection computer 2 constituting the position detection means together with the GPS receiver, and the guidance for navigation stored in the storage means 3 such as a floppy disk in advance. Among the map data, the guide map data including the current position of the vehicle is read by the display computer 4 as a control means, and the read guide map data is read by the display means 5 such as an LCD under the control of the display computer 4. Is displayed, and a predetermined mark indicating the current position of the vehicle is displayed on the guide map.

Further, in order to perform route guidance to a destination, a map code assigned to a guide map of a region surrounding the destination for each of various destinations in the storage means 3 and a guide map of the destination are provided. Is stored, and when a desired destination is set by operating the operation means 6 including a cursor movement key or the like, the destination setting of the set destination is stored from the storage means 3. The list is read by the display computer 4, and the guide map data corresponding to the guide map code in the destination setting list is read from the storage unit 3 by the display computer 4 and read to the display unit 5. A guidance map based on the data is displayed, and a guidance route to a set destination based on the guidance map data read by the display computer 4 is displayed. Is derived, the guide route derived by the guide map displayed on the display unit 5 is adapted to be displayed.

At this time, the destination setting list is stored in detail in a format as shown in FIG. 5, and is assigned to each general destination name such as a government office, a park, a theater, a department store, and a supermarket. A classification code, a facility name such as “XX department store” corresponding to a specific destination, a map code assigned to a guide map of a surrounding area including the facility name, and a map coordinate (X,
Y) and the telephone number of the facility constitute a destination setting list format.

[0005] As a guidance route to a destination, for example, a configuration as shown in FIG. 6 is made, and a guidance route to a hatched destination in the figure is displayed by a plurality of guidance points indicated by circles. . The arrows in FIG. 6 indicate one-way traffic.

[0006]

However, in the case of the conventional route guidance, as shown in FIG.
Only guidance points at major road levels such as prefectural roads are displayed, and guidance points are not displayed for narrow streets below the major road level, so it is not possible to provide sufficient route guidance and guidance routes to narrow street levels In order to perform display, it is necessary to derive guidance points on narrow streets by performing complicated calculations based on guide map data and map coordinates of destinations, which requires enormous amounts of data and extremely long calculation time. Become.

Therefore, the present invention has been made to solve the above-mentioned problems, and it is possible to accurately guide a route to a narrow street level without requiring an enormous amount of data and a long operation time. The purpose is to be able to do.

[0008]

According to the route guidance method of the navigation system according to the present invention, the storage means stores the data of the guide map for navigation,
For each of various destinations, a destination setting list including a map code assigned to a guide map of a surrounding area of the destination and map coordinates of the destination is stored, and a desired destination is operated by operating the operation means. When set, the control unit reads out the destination setting list of the desired destination from the storage unit, and the control unit reads the data of the guidance map corresponding to the guidance map code in the read destination setting list. The control unit reads out the guidance map from the storage unit and displays a guidance map based on the read guidance map data on the display unit. Navigator for deriving a guidance route to a desired destination and displaying the guidance route derived on the guide map being displayed on the display means In the route guidance method of the location system, the destination setting list includes map coordinates of a nearest intersection of the destination at a main road level such as a national road or a prefectural road, and main roads from the nearest intersection to the destination. Guide route data of a narrow street below the level is added, and a guide route of the narrow street based on the guide route data of the narrow street is displayed on the display means.

[0009]

According to the present invention, map coordinates of the nearest intersection of the destination at the main road level and guidance route data of a narrow street from the nearest intersection to the destination are added to the destination setting list. By doing so, a narrow street-level guidance route to a destination is displayed without requiring an enormous amount of data or a long calculation time as in the related art, and accurate route guidance can be performed.

[0010]

FIG. 1 is a diagram for explaining the operation of an embodiment of the present invention, FIG. 2 is a flowchart for explaining the operation, and FIG. 3 is a diagram for explaining the operation.

However, since the navigation system applied to this embodiment has the same configuration as that shown in FIG. 4, FIG. 4 will also be referred to in the following description.

FIG. 1 shows a format of a destination setting list to be stored in the storage means 3. What is different from FIG. 5 is that the destination setting list shown in FIG. Map coordinates (x,
y) and map coordinates (x1, y1), (x) of the guidance point on the narrow street as guidance route data of the narrow street below the main road level from the nearest intersection to the destination.
, Y2),... Are added.

Next, a series of operations will be described with reference to the flowchart of FIG.

When a destination is set by operating the operation means 6, that is, a desired facility name such as "XX department store" is input (step S1), a destination setting list of the set destination is displayed. The computer 4 reads the guide map data corresponding to the map code in the read destination setting list read out from the storage means 3 and further reads out the guide map data from the storage means 3 to display the guide map based on the data. And a guidance route from the current position derived by the position detection computer 2 to the nearest intersection is derived based on the map coordinates (x, y) of the nearest intersection in the destination setting list (step S2), Guidance points on the derived guidance route are displayed as circles on the displayed guide map (step S3).

Then, based on the map coordinates of the guidance points on the narrow street in the read destination setting list, these guidance points are displayed with a circle on the displayed guide map (step S4), and further the destination is displayed. The desired facility, which is the destination, is displayed on the displayed guide map based on the map coordinates of the destination in the setting list (step S5), and the operation ends thereafter.

In this way, the guidance route is displayed as shown in FIG. 3. As can be seen from comparison with FIG. 6, even in the case of FIG. In addition to the guide point indicating the nearest intersection indicated by (x, y), the guide point on the narrow street indicated by coordinates (x1, y1), (x2, y2),... Is added to the format of FIG. A more accurate display will be made as the guidance route to the destination.

Therefore, accurate route guidance down to the narrow street level can be performed without requiring an enormous amount of data and a long calculation time as in the conventional case.

It should be noted that the destination setting list is not limited to the format shown in FIG.

[0019]

As described above, according to the route guidance method of the navigation system of the present invention, the destination setting list includes the map coordinates of the nearest intersection of the destination at the main road level, and the destination from the nearest intersection. To the nearest intersection of the destination
Almost all calculations are performed on narrow streets from the destination to the destination
No, based on pre-added guidance route data
The destination setting list.
Destinations from the nearest intersection to narrow streets
You can easily display the guidance route, display the guidance route at the narrow street level to the destination without requiring a huge amount of data and long calculation time as before, and perform accurate route guidance, This is extremely effective for improving the functions of the navigation system.

[Brief description of the drawings]

FIG. 1 is an operation explanatory diagram of one embodiment of the present invention.

FIG. 2 is a flowchart illustrating an operation of the embodiment.

FIG. 3 is an operation explanatory diagram of one embodiment.

FIG. 4 is a block diagram of a general navigation system.

FIG. 5 is an operation diagram explanatory diagram of a conventional example.

FIG. 6 is an operation diagram explanatory diagram of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 GPS receiver 2 Position detection computer 3 Storage means 4 Display computer (control means) 5 Display means 6 Operation means

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G08G 1/0969 G01C 21/00 G09B 29/10

Claims (1)

(57) [Claims] 1. A storage means for storing data of a navigation guide map in a storage means, and for each of various destinations, a map code assigned to a guide map of a surrounding area of the destination and map coordinates of the destination. When a desired destination is set by operating the operation means, a destination setting list of the desired destination is read from the storage means by the control means, and the read destination setting list is stored. The control unit reads the guide map data corresponding to the guide map code in the ground setting list from the storage unit, displays the guide map based on the read guide map data on the display unit, and displays the read guide map. Based on the data, the control means derives a guidance route from the current position of the vehicle by the position detection means to the desired destination, A route guidance method of a navigation system for displaying the guidance route derived on the guide map being displayed on the display means, wherein the destination setting list includes a location nearest to the destination at a main road level such as a national road or a prefectural road. Map coordinates of the intersection, and the guidance route data of the narrow street below the main road level from the nearest intersection to the destination, the narrow street based on the guidance route data of the narrow street in the display means. A route guidance method for a navigation system, wherein a navigation route of the navigation system is displayed.