JPH05113756A - Navigation system - Google Patents

Abstract

PURPOSE:To display route information to the destination as well as the present position in an easily understandable way in a navigation system for displaying a neighboring map according to the present position of a moving body such as an automobile. CONSTITUTION:An on-road coincidence detecting part 3 detects whether the present position of a moving body exists on a trunk road in first map information stored in a map information storage part 2 at a small scale factor, that is, to mainly display only trunk roads so as to enable the grasp on the whole. In the case of the present position not existing on the trunk road, the single nearest trunk road is found by a distance computing part 4, and a new road is described by an image describing part 5 and displayed by a display part 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a navigation system for displaying a map of the vicinity of a moving body such as an automobile according to its current position.

[0002]

2. Description of the Related Art With the recent development of car electronics, a navigation system has been attracting attention.

A conventional navigation system will be described below. FIG. 10 is a conceptual diagram of a conventional navigation system. In FIG. 10, 91 is a vehicle equipped with a navigation system, 92 is a navigation system body including a display unit, and 93 is a storage device that holds map data to be displayed on the navigation system body 92. Reference numeral 94 is a position sensor for obtaining the current position, which may be GPS using a satellite or inertial navigation.

The operation of the above arrangement will be described below with reference to FIGS. 11 and 12. 11 and 12 show specific map display screens on the display unit of the conventional navigation system body 92, where 95 is a mark indicating the current position of the vehicle 91, and 96 is the current position of the navigation system body 92. It is a mark of the search route when going to the destination. The difference between FIG. 11 and FIG. 12 is that the scale of FIG. 11 is based on map data having a scale of about 1 in 25,000, and the scale of FIG. 12 is based on data at about 1 / 50,000. It is in. (Hereinafter, as for the scale, the one with a small denominator is defined as "large scale" and the one with a large denominator is defined as "small". For example, "5.
When comparing the scale of 1 / 10,000 and the scale of 1/25, the scale of 1 / 50,000 is smaller and the scale of 1/25 is smaller. It becomes bigger. ) First, in order to know the current position of the vehicle 91, the current position is measured from the information of the position sensor 94 attached to the vehicle 91. Based on the latitude and longitude values obtained as a result, an appropriate map is selected from the map data of the storage device 93 so that the current position is located on the screen, and displayed on the navigation system 92.

[0005]

However, in the above-mentioned conventional configuration, when a small scale map such as 1 / 50,000 is selected as the map to be displayed, only the main road is displayed, and the entire main road is displayed. Although it is possible to grasp the actual geography, narrow roads that are not highways are not displayed even if they are on a large-scale map installed in the navigation system (such roads are referred to as narrow streets below).

Further, if the current position is on a narrow street, it means that the vehicle is located on the outside of the road on a small scale map, which makes it difficult to select an appropriate traveling direction to the destination. I had.

The present invention solves the above conventional problems, and an object of the present invention is to provide a navigation system which displays route information around the current position and the destination in an easy-to-understand manner.

[0008]

In order to achieve the above object, the present invention firstly includes a current position detecting means for detecting the current position of the self and a first position including the current position detected by the current position detecting means. And detecting whether or not the current position detected by the current position detection means exists on the road in the first peripheral map information output by the map information storage means And the current position in the road coincidence detection means is the first position.
If it is determined that the current position is not on the road in the peripheral map information, it is determined whether the current position is closest to the road in the first peripheral map information or to which road in the traveling direction which is the route search result. A new road is drawn from the current position in the first surrounding map information with respect to the distance calculation unit that calculates based on the distance to the current position and the road that is calculated and determined to be closest by the distance calculation unit. And the roadside coincidence detecting means determines that the current position exists on the road in the first peripheral map information, which is the output of the map information storage means. While selecting the first surrounding map information, the road coincidence detecting means may determine that the current position does not exist on the road in the first surrounding map information. And switch means for selecting the second peripheral map information output from the drawing means, and display means for displaying the first or second peripheral map information selected by the switch means. ..

Secondly, the present invention includes the present position detecting means for detecting the present position of the self and the present position detected by the present position detecting means, and the first position to be displayed on the screen at the first scale. A second map information storage unit for outputting the peripheral map information of No. 2, and a second map to be displayed on the screen at a second scale larger than the first scale, the second position including the current position detected by the current position detection unit. Present position detected by the present position detecting means on the road in the second map information storage means for outputting the peripheral map information of the above and the first peripheral map information output by the first map information storage means. Output of the first map information storage means by determining whether the current position exists on the road in the first peripheral map information by the road coincidence detection means for detecting whether or not The second map information storage means is selected by selecting the certain first surrounding map information, while the road coincidence detecting means determines that the current position does not exist on the road in the first surrounding map information. Switch means for selecting the second peripheral map information which is the output of the above, and display means for displaying the first or second peripheral map information selected by the switch means.

Thirdly, the present invention includes a present position detecting means for detecting a present position of the self and a present position detected by the present position detecting means, and a first scale to be displayed on a screen at a first scale. A second map information storage unit for outputting the peripheral map information of No. 2, and a second map to be displayed on the screen at a second scale larger than the first scale, the second position including the current position detected by the current position detection unit. Second map information storage means for outputting the peripheral map information and the first and second peripheral map information output by the first and second map information storage means are stored at positions on the map that are the same. Existing intersections, or intersection detection means for detecting an intersection stored at a position on the map that coincides with each other in the route to the destination, and the intersection information detected by the intersection detection means. Around Drawing means for drawing both of the drawing information, switch means for selecting and outputting one of the first and second peripheral map information drawn by the drawing means, the first or the first selected by the switch means, or Display means for displaying the second peripheral map information is provided.

A fourth aspect of the present invention is to include a present position detecting means for detecting the present position of the self and the present position detected by the present position detecting means and to display the present position on the screen at the first scale. A second map information storage unit for outputting the peripheral map information of No. 2, and a second map to be displayed on the screen at a second scale larger than the first scale, the second position including the current position detected by the current position detection unit. In the route to the destination or the intersection stored in the second peripheral map information output by the second peripheral map information storage means for outputting the peripheral peripheral map information of Intersection detection means for detecting the position of a certain intersection, and drawing means for drawing the position of the intersection detected by the intersection detection means on the road of the first peripheral map information output by the first map information storage means, The above Switch means for selecting and outputting one of the first peripheral map information drawn by the drawing means and the second peripheral map information output by the second map information storage means; and the switch means selected by the switch means. Display means for displaying the first or second peripheral map information is provided.

[0012]

According to the configuration of the first aspect of the present invention, when the current position currently being advanced is not on the road in the first peripheral map information having a small scale and capable of grasping the whole, the current position is By drawing and displaying a new road from to the relevant road, it is easy to understand the route information to the destination together with the current position. If necessary, the road search result may be drawn up to the road closest to the traveling direction.

According to the second aspect of the present invention,
If there is no current position on the road in the first surrounding map information that can be grasped more comprehensively, the second surrounding map information with a larger scale than the first surrounding map information is automatically added. By switching to, you can display according to the current position.

Further, according to the configurations of the third and fourth aspects of the present invention, at least the display information of the first peripheral map information having a small scale and the second peripheral map information having a large scale and a part thereof are displayed. By displaying intersections that are common to both sides, the surrounding map information of both can be compared as necessary, and it is easy to understand the route information to the destination together with the current position.

[0015]

【Example】

(Embodiment 1) Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block connection diagram of a navigation system according to a first embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a publicly known navigation unit that constantly detects the current position of its own, which is a moving body, and also constantly detects the current position by a GPS system or an inertial navigation system. On the other hand, the closest route is searched from the preset current position and the destination. This search method is also generally based on map information by cpu or the like, and a route connecting the preset current position and destination is
It finds several main roads and selects the one that has the smallest distance and can be calculated from the found routes. On the other hand, this search is not uniquely fixed, and a route search is possible each time the current position moves and moves.

Reference numeral 2 denotes a map information storage unit for storing the first peripheral map information (including the current position) to be displayed on the screen at a scale of 1 / 50,000, specifically, an optical map storage unit. CD-
There is a ROM or a magnetic floppy disk, etc., and maps of various places can be read by addressing. Then, the map information storage unit 2 always outputs the map information of the surrounding area including the current position of the moving body according to the control of the navigation unit 1 and the current position information and the route search result. Indicates the current position and search route mark.

Reference numeral 3 is a road coincidence detection unit, which is a map information storage unit 2.
It is detected whether or not the current position detected by the navigation unit 1 exists on the road in the first peripheral map information output by. Specifically, a constant value is given only on the road in the first peripheral map information (for each map) output by the map information storage unit 2, and a value is given to the others outside the road. It is possible to determine whether or not the current position is present on the road of the first peripheral map information output by the map information storage unit 2, depending on whether or not the current position detected by the navigation unit 1 has a value. it can. Alternatively, if a certain color is given only on the road in the first peripheral map information output from the map information storage unit 2, the navigation unit 1 may make the road judgment based on the color. Many known methods can be considered for the match detection such as taking the sum.

Reference numeral 4 denotes a distance calculation unit which, when the road coincidence detection unit 3 determines that the current position does not exist on the road in the first surrounding map information, sets the current position to the first position.
Which of the roads in the traveling direction, which is the route search result in the peripheral map information, is closest to the plurality of roads is determined based on the distance to the current position. At this time, the distance calculation unit 4 may be set so as to simply determine the closest road which is familiar to the user regardless of the traveling direction which is the result of the route search. Further, it may be set so as to determine the road closest to the direction in which the moving body is currently traveling.

Reference numeral 5 denotes a drawing unit for the map information storage unit 2 for the road calculated by the distance calculation unit 4 and determined to be the closest.
A new road is drawn from the current position in the first peripheral map information output from to generate second peripheral map information.

Reference numeral 6 denotes a switch, which is an output of the map information storage unit 2 for controlling the road match detection unit 3, that is, when the road match detection unit 3 determines that the current position on the road in the first peripheral map information exists. Select the first surrounding map information. On the other hand, when the road coincidence detection unit 3 determines that the current position does not exist on the road in the first surrounding map information, the second surrounding map information output from the drawing unit 5 is selected.

A display control unit 7 controls the display unit 8 to visually display the first or second peripheral map information output from the switch 6. At this time, if there is necessary information to be displayed on the display unit 8 from the navigation unit 1 at the same time, the information is sent to the display control unit 7 and the first or second information output from the switch 6 is output. Along with the peripheral map information, for example, the screen is synthesized and displayed.

The operation of the above arrangement will be described below. First, the operator inputs the current position and the destination to the navigation unit 1. As an input method, the peripheral map information of the current position and the peripheral map information of the destination are appropriately read from the first peripheral map information of the map information storage unit 2 to the display unit 8 by an input means such as a keyboard, and initial setting is performed. With this initial setting, the navigation unit 1 finds several types of routes connecting the current position and the destination from the map information in the map information storage unit 2 and stores them in the route with the smallest travel distance or in the map information storage unit 2 at the same time. The basic travel time that is present, that is, the route or the like that minimizes the travel time due to the use of a highway or the like is searched and determined. And the display unit 8
The map information including the current position is finally displayed along with the route to the destination, that is, the search route result information (travel direction information).

Next, when the current position deviates from the road stored in the map information storage unit 2 after the moving body has moved or during the above-mentioned initial setting, the road coincidence detection unit 3 outputs the information. To detect. That is, to the address indicating the current position sent from the navigation unit 1,
If the road of the map information transmitted from the map information storage unit 2 does not exist, it is determined that the current position is not on the road.
Note that, for example, "1" is given to the road of the map information as described above, and "0" is given to the portion other than the road,
Is the value of the address pointing to the current position "1"?
It may be judged whether it is "0".

Next, when the road coincidence detection unit 3 determines that the current position is not on the road, the distance calculation unit 4 is notified of that fact. The distance calculation unit 4 inputs the first surrounding map information including the current position from the map information storage unit 2 and the search route information to the destination, and the current position information from the navigation unit 1 via the road coincidence detection unit 3. , And heading information. Then, the distance calculation unit 4 obtains the direction closest to the searched route based on the current position information and the traveling direction information. That is, referring to the traveling direction information,
Find the direction of the shortest distance connecting the current position and the search route. At this time, if some weight is added to the traveling direction information, the direction is not necessarily the shortest distance direction, but since the moving body is actually traveling along the road in that direction, the actual condition for the searched route is It is possible to find the "closest" direction that suits you.

Next, when the distance calculation unit 4 detects a certain direction with respect to the searched route, the drawing unit 5 inputs the first peripheral map information including the current position from the map information storage unit 2, and The second surrounding map information is created by drawing a new road according to the distance calculation unit 4 on the surrounding map information of.
Specifically, as shown in FIG. 2, a new road in the section A is drawn.

The switch 6 is controlled by the road coincidence detection unit 3 to select the output of the drawing unit 5 or the output of the map information storage unit 2. That is, when the road coincidence detection unit 3 determines that the current position is on the road, the output (first peripheral map information) of the map information storage unit 2 is selected by the switching control signal of the road coincidence detection unit 3. On the other hand, when the road coincidence detection unit 3 determines that the current position is not on the road, the output of the drawing unit 5 by the switching control signal of the road coincidence detection unit 3 (second peripheral map information)
Select.

One of the first and second peripheral map information selected by the switch 6 is screen-synthesized with the necessary information sent from the navigation unit 1 by the display control unit 7, and finally displayed on the display unit 8. A screen as shown in FIG. 2 can be obtained, and it becomes easy to understand the route information to the destination together with the current position.

In the present embodiment, the switching control of the switch 6 is switched according to the road coincidence determination result of the road detector 3, but the switch 6 is switched according to the instruction of the operator.
May be switched. Further, in this embodiment, the search route to the destination of the navigation unit 1 is once sent to the map information storage unit 2, and when the map information storage unit 2 outputs, the search route is already written in the first surrounding map information. However, the searched route may be written in the output from the switch 6 for the first time by screen synthesis in the display control unit 7.

(Second Embodiment) Next, a second embodiment of the present invention will be described. FIG. 3A is a block diagram of the essential parts of the navigation system in the second embodiment of the present invention. In the figure, a road coincidence detection unit 3, a distance calculation unit 4, a switch 6, and a navigation unit 1, a display control unit 7, and a display unit 8 (not shown) have the same configuration and connection as in FIG. As will be described in detail below, the difference from the configuration of FIG. 1 is that basically two pieces of map information having different scales are provided in the map information storage unit 2a, and the scale of the scale when drawing a new road in the drawing unit 5a is It is based on small map information.

That is, the map information storage unit 2a stores the first map information to be displayed on the screen at a scale of 1 / 50,000 and the storage unit 2A at a scale of 1 / 25,000. And a storage unit 2B that stores the second map information to be displayed on the. In addition, the drawing unit 5a draws a new road on the map information at a scale of 1 / 50,000 and has a scale of 1 / 25,000.
It is configured to draw by referring to the map information of.

In the above configuration, the operation of the drawing unit 5a will be described below. As in the first embodiment, when the distance calculating unit 4 detects a certain direction with respect to the searched route, the drawing unit 5a is detected. Then, the second peripheral map information (1 / 25,000 scale) including the current position is input from the map information storage unit 2B, the traveling road on which the mobile body is traveling is found from the current position information, and is determined. On the other hand, the drawing unit 5a inputs the first peripheral map information (scale: 1 / 50,000) including the current position from the map information storage unit 2a, and adds the first peripheral map information to the first peripheral map information.
The third surrounding map information is created by drawing the traveling road found from the second surrounding map information (scale of 1 / 25,000).

As described above, according to this embodiment, the first
Compared with the embodiment described above, since a new road is drawn by referring to the more detailed map information of the peripheral area of 1 / 25,000, more realistic drawing is possible. In particular, the traveling road on which the mobile body is traveling has no description in the peripheral map information at a scale of 1 / 50,000, and the peripheral road information at a scale of 1 / 25,000 has a description of the traveling road, and When the traveling road matches the direction determined by the distance calculation unit 4, the road drawn by the drawing unit 5a is a road that actually exists, and accurate drawing is possible.

In this embodiment, the scale is 1 / 25,000.
Although a map with a scale of 1 / 50,000 was used, it goes without saying that a map with another scale may be used.

(Embodiment 3) Next, a third embodiment of the present invention will be described. FIG. 3B is a block connection diagram of the navigation system in the third embodiment of the present invention. In this embodiment, the difference from the second embodiment in FIG. 3A is that the second map information of the storage unit 2B stored at a scale of 1 / 25,000 is displayed by the switch 6b and the display control. The point is that it can be displayed on the display unit 8 via the unit 7.

That is, when the operator operates a specific forcible display key such as a keyboard (not shown), the second peripheral map information (scale of 25,000) can be displayed. Then, the operator can see only the detailed peripheral map information as needed.

As described above, according to this embodiment, it is possible to provide a system in which the operator can easily understand the route information.

In this embodiment, the scale is 1 / 25,000.
Although a map with a scale of 1 / 50,000 was used, it goes without saying that a map with another scale may be used. Further, the map information stored in the map information storage unit 2a may be other than this.

(Embodiment 4) Next, a fourth embodiment of the present invention will be described. FIG. 4 is a block connection diagram of the navigation system according to the fourth embodiment of the present invention. The present embodiment is different from the third embodiment in FIG. 3B in that the distance calculation unit 4 and the drawing unit 5a are omitted.

According to the above configuration, when the road coincidence detecting unit 3 determines that the current position does not exist on the road, a switching control signal is given to the switch 6c to reduce the current position to 1 / 25,000.
The switch 6c is controlled so as to display the second map information of the storage unit 2B stored at the reduced scale on the display unit 8. Specifically, when the road coincidence detection unit 3 determines that the current position does not exist on the road as shown in FIG. 5A, a switch control signal is given to the switch 6c, and as shown in FIG. Display the second map information at a scale of 1 in 25,000
To display. Then, after a certain traveling, the road coincidence detection unit 3
When it is determined that the current position at a scale of 1 / 50,000 is present on the road, a switching signal is given to the switch 6c, and the first map information of the storage unit 2A stored at a scale of 1 / 50,000 is stored. Switch 6 to display on the display 8.
Control c.

As described above, according to the present embodiment, the road on which the vehicle is traveling is always displayed, and in the display, the peripheral map information having a larger scale, that is, the entire map can be grasped is selected. The system makes it easier for the operator to understand the route information.

In this embodiment, the scale is 1 / 25,000.
Although a map with a scale of 1 / 50,000 was used, it goes without saying that a map with another scale may be used. Further, the map information stored in the map information storage unit 2a may be other than this.

(Embodiment 5) Hereinafter, a fifth embodiment of the present invention will be described with reference to the drawings.

FIG. 6 is a block connection diagram of the navigation system in the fifth embodiment of the present invention. In FIG. 6, reference numeral 1 denotes a publicly known navigation unit that constantly detects the current position of the moving body itself and searches for a route to a destination, which has the same structure as that of FIG.

2A is a storage unit for storing the first map information to be displayed on the screen at a scale of 1 / 50,000, and 2B is 25.
A storage unit that stores the second map information to be displayed on the screen at a scale of one-thousandth, and the map information storage unit 2 is configured by these two storage units 2A and 2B. Is the same as 9 is an intersection detection unit, which is a storage unit 2A, 2B.
The intersections (road intersections) on the map are detected from the first and second map information in FIG. In detecting this intersection, as is seen in the method of previously assigning constant flag information to the address of the detailed position of the first and second map information in the storage units 2A and 2B, and the pattern recognition technique. Many known techniques such as a method of searching for a branch point from skeleton image processing can be used. At the time of this detection, the intersection detection unit 9 may detect all the intersections currently output from the storage units 2A and 2B regardless of the route search result and the traveling direction, or the route search result and the self-direction. The detection may be limited to only the intersections that have a relationship in the traveling direction of.

Reference numeral 10A is an intersection display drawing unit, which is based on the intersection detection result of the intersection detection unit 9 and has a second scale of 1 / 25,000 on the first map information of a scale of 1 / 50,000. Write the intersection information in the map information. The writing position can be obtained by writing the intersection at a position where the enlargement or reduction is performed according to the scale of the opponent. Alternatively, it is possible to obtain a fixed position based on the pattern recognition technique described above. Specifically, when the intersection detected by the intersection detection unit 9 is written on the first map information with a scale of 1 / 50,000 as shown in FIG. 7, the result is as shown in FIG. In addition, in FIG. 8, the mark 97 indicates an intersection detected in agreement with each other.
The mark 98 is an intersection found in the second map information with a scale of 1 / 25,000 although there is no intersection in the first map information with a scale of 1 / 50,000.

10B is also an intersection display drawing unit, and based on the intersection detection result of the intersection detection unit 9, on the second map information of the scale of 1 / 25,000, the first scale of 1 / 50,000 is displayed. Write the intersection information in the map information. This writing position can be obtained in the same manner as the intersection display drawing unit 10A. Specifically, it becomes as shown in FIG. In addition, in FIG. 9, 97 is an intersection found in the first map information at a scale of 1 / 50,000.

Reference numeral 6 denotes a switch, which can select the output of the intersection display drawing unit 10A or the intersection display drawing unit 10B via the navigation unit 1 according to the wish of the operator. 1 and FIG. 3 are the same as the switch. The switch 6 may be switched by further providing the road coincidence detector 3 as disclosed in the fourth embodiment shown in FIG.

A display control unit 7 controls the output of the intersection display drawing unit 10A or the intersection display drawing unit 10B output via the switch 6 to be visually displayed on the display unit 8. At this time, if there is necessary information to be displayed from the navigation unit 1, the information is sent to the display control unit 7 and is displayed together with the information output from the switch 6 by, for example, screen synthesis.

The operation of the above arrangement will be described below. First, the operator inputs the current position and the destination to the navigation unit 1. The input method is from the first peripheral map information (scale 1: 50,000) or the second peripheral map information (scale: 25,000) in one of the storage units 2A and 2B in the map information storage unit 2. The map information of the current position and the map information of the destination are properly read on the display unit 8 by an input means such as a keyboard, and initial setting is performed. With this initial setting, the navigation unit 1 finds several types of routes connecting the current position and the destination from the map information in the map information storage unit 2 and stores them in the route with the smallest travel distance or in the map information storage unit 2 at the same time. The basic travel time that is present, that is, the route or the like that minimizes the travel time due to the use of a highway or the like is searched and determined. Then, the map information including the current position is finally displayed on the display unit 8 together with the route to the destination, that is, the search route result information (travel direction information).

Next, the intersection detection unit 8 displays the finally displayed first peripheral map information (scale 1 / 50,000) of the storage units 2A and 2B in the map information storage unit 2 or the second map.
By inputting both of the peripheral map information (scale of 1 / 25,000) and searching the branch point from the skeleton image processing as described in the pattern recognition technology as described above, Detect the position. Then, in the intersection display drawing unit 10A, not only the intersection position information of the first peripheral map information (scale 1: 50,000) but also the intersection position information of the second peripheral map information (scale: 25,000) Will also be notified. Similarly, not only the intersection position information of the second peripheral map information (scale of 1 / 25,000) but also the intersection position of the first peripheral map information (scale of 1 / 50,000) is displayed in the intersection display drawing unit 10B. Information is also notified.

Next, in the intersection display drawing unit 10A, based on the intersection detection result of the intersection detection unit 9, the first map information of the scale of 1 / 50,000 is displayed on the first map information of the scale of 1 / 50,000. The 97 mark shown in FIG. 8 is written at the intersection position recognized as an intersection in common in both the map information and the second map information with a scale of 1 / 25,000. Further, although there is no intersection in the first map information of the scale of 1 / 50,000, the intersection found in the second map information of the scale of 1 / 25,000 is shown in FIG. Write the mark of 98.

On the other hand, the intersection display drawing unit 10B, based on the intersection detection result of the intersection detection unit 9, on the second map information of the scale of 1 / 25,000, the first scale of 1 / 50,000. The mark 97 shown in FIG. 9 is written only in the intersection position recognized as an intersection in the map information of FIG.

Finally, the operator controls the switch 6 so that the display control unit 7 synthesizes the screen with the necessary information sent from the navigation unit 1, and finally, as shown in FIG. 8 or FIG. Since it is possible to obtain various screens and to associate the surrounding map information at both scales with the intersection information as a key, it becomes easy to understand the route information to the destination together with the current position.

As described above, according to the present embodiment, the intersection detection unit 9 detects the intersections from the map information of both scales, and at least the commonly detected intersections are written in the respective peripheral map information. Since it is possible to associate both peripheral map information with the intersection information as a key, it becomes easy to understand the route information to the destination together with the current position.

In this embodiment, the intersection detection unit 9 detects both intersections as keys, but other than the intersections, for example, police boxes, fire stations, hospitals, and public offices may be detected as keys. Further, in the present embodiment, two intersection display drawing units are provided and the intersection information is drawn in the respective surrounding map information. However, only the intersection display drawing unit 10A is provided, and only the peripheral map information with a scale of 1 / 50,000 is used. May be displayed. Further, the switch 6 has been described to be arbitrarily switched by the operator, but as described above, even if the road coincidence detection section 3 is further provided as described in the fourth embodiment shown in FIG. 5, switching is performed. good. Also,
The intersections may be detected at all the intersections, or may be detected only at the intersections that have a relationship with respect to the route search result or the own traveling direction. Furthermore, in the present embodiment, a map with a scale of 1 / 25,000 and a scale of 1 / 50,000 was used, but it goes without saying that a map with another scale may be used. Further, the map information stored in the map information storage unit 2a may be other than this.

[0057]

As described above, according to the present invention, firstly, in the case where the current position currently being advanced is not present on the road in the first peripheral map information having a small scale and capable of grasping the whole, By drawing and displaying a new road from the current position to the road, it is easy to understand the route information to the destination together with the current position. If necessary, it is possible to draw up to the road closest to the traveling direction, which is the result of the route search.

Secondly, in the case where there is no current position on the road in the first peripheral map information that can be grasped more comprehensively, the scale is larger than that of the first peripheral map information. By automatically switching to the second peripheral map information, a display suitable for the current position can be displayed.

Furthermore, in the third and fourth aspects, the display information of the first peripheral map information having a small scale at least is partially matched with the second peripheral map information having a large scale ratio. By displaying intersections that are common points,
If necessary, both surrounding map information can be compared and it is easy to understand the route information to the destination together with the current position.

[Brief description of drawings]

FIG. 1 is a block connection diagram of a navigation system according to a first embodiment of the present invention.

FIG. 2 is a conceptual diagram of a display unit of the navigation system in the embodiment.

FIG. 3 is a block connection diagram of a navigation system according to second and third embodiments of the present invention.

FIG. 4 is a block connection diagram of a navigation system according to a fourth embodiment of the present invention.

FIG. 5 is a conceptual diagram of a display unit of the navigation system in the example.

FIG. 6 is a block connection diagram of a navigation system according to a fifth embodiment of the present invention.

FIG. 7 is a conceptual diagram of a display unit of the navigation system in the example.

FIG. 8 is a conceptual diagram of a display unit of the navigation system in the example.

FIG. 9 is a conceptual diagram of a display unit of the navigation system in the example.

FIG. 10 is a block conceptual diagram of a conventional navigation system.

FIG. 11 is a conceptual diagram of a display unit of the navigation system.

FIG. 12 is a conceptual diagram of a display unit of the navigation system.

[Explanation of symbols]

 1 Navigation Section 2 Map Information Storage Section 3 Road Match Detection Section 4 Distance Calculation Section 5 Drawing Section 6 Switch 7 Display Control Section 8 Display Section 9 Intersection Detection Section 10A, 10B Intersection Display Drawing Section

Claims (17)

[Claims] 1. A current position detecting means for detecting its own current position, and a map information storage means for outputting first peripheral map information including the current position detected by the current position detecting means,
A road coincidence detection unit that detects whether or not the current position detected by the current position detection unit exists on the road in the first peripheral map information output by the map information storage unit;
When it is determined that the current position does not exist on the road in the first surrounding map information in the road coincidence detecting means,
For the distance calculating means for calculating which road in the first surrounding map information the current position is closest based on the distance to the current position, and for the road calculated by the distance calculating means and determined to be the closest And a drawing means for drawing a new road from the current position in the first surrounding map information to create second surrounding map information, and the road coincidence detecting means on the road in the first surrounding map information. The first peripheral map information output from the map information storage means is selected by determining that the current position exists in the, and the road coincidence detection means displays the road on the road in the first peripheral map information. Switch means for selecting the second peripheral map information output from the drawing means by determining that the current position does not exist, and the switch means selected by the switch means. 1 or navigation system and a display means for displaying a second peripheral map information. 2. A current position detecting means for detecting a current position of the self and for searching a route to a destination, and outputting first peripheral map information including the current position detected by the current position detecting means. Map information storage means, and road coincidence detection means for detecting whether or not the current position detected by the current position detection means exists on the road in the first peripheral map information output by the map information storage means. If the current position is judged not to exist on the road in the first peripheral map information by the road coincidence detecting means, the current position is in which direction of the road is the route search result in the first peripheral map information. The distance calculation means that calculates the closest distance based on the distance to the current position and the road that the distance calculation means calculates and determines to be closest to the first Drawing means for drawing a new road from the current position in the edge map information to create second surrounding map information, and the road coincidence detecting means for existence of the present position on the road in the first surrounding map information. By judging that, the first peripheral map information output from the map information storage means is selected, while the road coincidence detection means does not have the current position on the road in the first peripheral map information. Switch means for selecting the second peripheral map information which is the output of the drawing means, and display means for displaying the first or second peripheral map information selected by the switch means. A navigation system including. 3. Outputting first peripheral map information to be displayed on a screen at a first scale, which includes a current position detecting means for detecting its own current position and a current position detected by said current position detecting means. Second peripheral map information to be displayed on the screen at a second scale that is larger than the first scale and that includes the first map information storage unit and the current position detected by the current position detection unit. It is detected whether or not the current position detected by the current position detection means exists on the road in the second map information storage means and the first peripheral map information output by the first map information storage means. If the current position is determined not to exist on the road in the first peripheral map information by the road coincidence detecting means, the current position in the first peripheral map information is determined. The distance calculation means for calculating whether the vehicle is closest to the road based on the distance to the current position, and the current position in the first peripheral map information for the road calculated by the distance calculation means and determined to be the closest The drawing means for drawing a new road from the second map information storage means on the basis of the second peripheral map information output by the second map information storage means to create the third peripheral map information, and the road coincidence detection means for the third road map detection means. The first peripheral map information output from the map information storage means is selected by determining that the current position exists on the road in the first peripheral map information, while the road coincidence detection means selects the first peripheral map information. Switch means for selecting the third peripheral map information output from the drawing means by determining that the current position does not exist on the road in the peripheral map information of Navigation system and a display means for displaying the first or the third peripheral map information, the selected Ri. 4. A screen according to a first scale, which includes a current position detecting means for detecting the current position of the self and searching for a route to a destination, and a current position detected by the current position detecting means. A first map information storage means for outputting first peripheral map information to be displayed on the screen, and a second scale larger than the first scale and including the current position detected by the current position detection means. Second map information storage means for outputting second peripheral map information to be displayed on the first map information, and first map information storage means for outputting the first peripheral map information.
On the road in the peripheral map information, the road coincidence detecting means for detecting whether or not the current position detected by the current position detecting means exists, and the current position in the road coincidence detecting means is the first peripheral map information. When it is determined that the current position is not present on the road, the distance calculation means for calculating which road in the traveling direction which is the route search result in the first surrounding map information is closest to the current position based on the distance to the current position. The second map information storage means outputs a new road from the current position in the first surrounding map information with respect to the road which is calculated by the distance calculation means and is determined to be closest. Drawing means for drawing the third surrounding map information based on the surrounding map information and the road coincidence detecting means for displaying the current position on the road in the first surrounding map information. By determining that the position exists, the first peripheral map information output from the map information storage means is selected, and on the other hand, the road coincidence detection means selects the current position on the road in the first peripheral map information. A switch means for selecting the third peripheral map information output from the drawing means by determining that there is not any, and the first or second peripheral map information selected by the switch means is displayed. A navigation system comprising a display means. 5. Outputting first peripheral map information to be displayed on a screen at a first scale, which includes a current position detecting means for detecting its own current position and a current position detected by said current position detecting means. Second peripheral map information to be displayed on the screen at a second scale that is larger than the first scale and that includes the first map information storage unit and the current position detected by the current position detection unit. It is detected whether or not the current position detected by the current position detection means exists on the road in the second map information storage means and the first peripheral map information output by the first map information storage means. If the current position is determined not to exist on the road in the first peripheral map information by the road coincidence detecting means, the current position in the first peripheral map information is determined. The distance calculation means for calculating whether the vehicle is closest to the road based on the distance to the current position, and the current position in the first peripheral map information for the road calculated by the distance calculation means and determined to be the closest The drawing means for drawing a new road from the second map information storage means on the basis of the second peripheral map information output by the second map information storage means to create the third peripheral map information, and the road coincidence detection means for the third road map detection means. The first peripheral map information output from the map information storage means is selected by determining that the current position exists on the road in the first peripheral map information, while the road coincidence detection means selects the first peripheral map information. Before it is the second peripheral map information output by the second map information storage means by determining that the current position does not exist on the road in the peripheral map information, or the output of the drawing means. Navigation system comprising a switching means for selecting a third peripheral map information, said first selected by said switch means, or a display means for displaying a third peripheral map information. 6. The navigation system according to claim 5, wherein selection control of the second peripheral map information and the third peripheral map information of the switch means is instructed by an operator. 7. A screen according to a first scale, which includes a current position detecting means for detecting a current position of the self and searching for a route to a destination, and a current position detected by the current position detecting means. A first map information storage means for outputting first peripheral map information to be displayed on the screen, and a second scale larger than the first scale and including the current position detected by the current position detection means. Second map information storage means for outputting second peripheral map information to be displayed on the first map information, and first map information storage means for outputting the first peripheral map information.
On the road in the peripheral map information, the road coincidence detecting means for detecting whether or not the current position detected by the current position detecting means exists, and the current position in the road coincidence detecting means is the first peripheral map information. When it is determined that the current position is not present on the road, the distance calculation means for calculating which road in the traveling direction which is the route search result in the first surrounding map information is closest to, based on the distance to the current position. The second map information storage means outputs a new road from the current position in the first surrounding map information with respect to the road which is calculated by the distance calculation means and is determined to be closest. Drawing means for drawing the third surrounding map information based on the surrounding map information and the road coincidence detecting means for displaying the current position on the road in the first surrounding map information. By determining that the position exists, the first peripheral map information output from the map information storage means is selected, and on the other hand, the road coincidence detection means selects the current position on the road in the first peripheral map information. Switch means for selecting the second peripheral map information output by the second map information storage means or the third peripheral map information output by the drawing means when it is determined that no switch exists, and the switch. The first selected by means,
Alternatively, a navigation system including a display unit that displays second peripheral map information. 8. The navigation system according to claim 5, wherein selection control of the second peripheral map information and the third peripheral map information by the switch means is instructed by an operator. 9. A current position detection means for detecting the current position of the self and a current position detected by the current position detection means, and also outputs first peripheral map information to be displayed on the screen at a first scale. Second peripheral map information to be displayed on the screen at a second scale that is larger than the first scale and that includes the first map information storage unit and the current position detected by the current position detection unit. It is detected whether or not the current position detected by the current position detection means exists on the road in the second map information storage means and the first peripheral map information output by the first map information storage means. The road coincidence detecting means and the road coincidence detecting means determine that the current position exists on the road in the first peripheral map information, and the first map information storage means outputs the first position. Lap The side map information is selected, and on the other hand, the road coincidence detection means determines that the current position does not exist on the road in the first surrounding map information, and the output is the output of the second map information storage means. A navigation system comprising: switch means for selecting second peripheral map information; and display means for displaying the first or second peripheral map information selected by the switch means. 10. A first position detecting means for detecting a current position of the self and a current position detected by the current position detecting means, and a first scale to be displayed on a screen at a first scale.
First map information storage means for outputting peripheral map information of
Second map information storage means for outputting second peripheral map information to be displayed on the screen at a second scale larger than the first scale and including the current position detected by the current position detection means, An intersection detecting unit that detects an intersection stored at a position on the map that matches both of the first and second peripheral map information output from the first and second map information storing units, and the intersection detecting unit. Drawing means for drawing the detected intersection information on both the first and second peripheral map information, and a switch means for selecting and outputting one of the first and second peripheral map information drawn by the drawing means, A navigation system comprising: a display unit for displaying the first or second peripheral map information selected by the switch unit. 11. The navigation system according to claim 10, wherein selection control of the switch means is instructed by an operator. 12. While detecting the current position of the self,
A current position detecting means for performing a route search to reach a destination, and a first peripheral map information to be displayed on the screen at a first scale, which includes the current position detected by the current position detecting means. A second map information storage means for outputting the second peripheral map information to be displayed on the screen at a second scale larger than the first scale and including the current position detected by the current position detection means; In the map information storage means of No. 2 and the first and second peripheral map information output by the first and second map information storage means, at the position on the map where both match in the route to the destination. An intersection detection unit that detects the stored intersection, a drawing unit that draws the intersection information detected by the intersection detection unit on both the first and second surrounding map information, and a first drawing unit that draws the intersection information. The second neighborhood Navigation system comprising a switching means for either selected to the output of the FIG information, and display means for displaying the first or second peripheral map information selected by said switch means. 13. The navigation system according to claim 12, wherein selection control of the switch means is instructed by an operator. 14. A first position detection means for detecting a current position of the self and a current position detected by the current position detection means, and a first scale to be displayed on a screen at a first scale.
First map information storage means for outputting peripheral map information of
Second map information storage means for outputting second peripheral map information to be displayed on the screen at a second scale larger than the first scale and including the current position detected by the current position detection means, The intersection detection means for detecting the position of the intersection stored in the second peripheral map information output by the second map information storage means, and the position of the intersection detected by the intersection detection means as the first map information. Drawing means for drawing on the road the first surrounding map information output by the storing means, the first surrounding map information drawn by the drawing means, and the second surroundings output by the second map information storing means. A navigation system comprising: switch means for selecting and outputting one of the map information and display means for displaying the first or second peripheral map information selected by the switch means. 15. The navigation system according to claim 14, wherein selection control of the switch means is instructed by an operator. 16. A first peripheral map information to be displayed on a screen at a first scale ratio, which includes a current position detecting means for detecting its own current position and a current position detected by the current position detecting means. The first map information storage unit for outputting and the current position detected by the current position detection unit are included and are larger than the first scale ratio, which is a partially detailed enlarged view of the first map information. , Outputting a second peripheral map information to be displayed on the screen at a second scale ratio
And the intersection detection means for detecting the position of the intersection in the route to the destination, which is stored in the second peripheral map information output from the second map information storage means. Drawing means for drawing the position of the intersection detected by the intersection detecting means on the road of the first peripheral map information output by the first map information storage means, and first peripheral map information drawn by the drawing means. , And switch means for selecting and outputting one of the second peripheral map information output by the second map information storage means, and the first or second peripheral map information selected by the switch means. A navigation system comprising a display means for displaying. 17. The navigation system according to claim 16, wherein selection control of the switch means is instructed by an operator.