JPH10103969A - Navigator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a navigation correct, easy to see and safe, by reading out map information on the basis of operated position information of a moving body and displaying both on a screen. SOLUTION: At a position detection part 110, an operation means 105 operates a position of a moving body from a move distance and a move azimuth of the moving body calculated by a move distance calculation means 103 and a move azimuth calculation means 104. A memory part 130 stores map information, video information, customer information, etc., and uses a memory medium having a memory capacity of not smaller than 5GB. A signal-processing part 120 retrieves routes of a start point-a destination-a return point input through 91 by a search means 122 from a map information memory means 131 and searches for an optimum route. When position information of the moving body operated by 105 is input, a position signal-processing means 123 reads out map information of a predetermined area from the map information memory means 131, so that an image of the map information is displayed 92 along with the position of the moving body. A large quantity of image information in addition to navigation information can be displayed, enabling a navigation easy to understand, correct and safe.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a navigation device mounted on a moving body such as a car and displaying the position of the moving body.

[0002]

2. Description of the Related Art A conventional navigation device will be described below.

As a conventional navigation device, a traveling navigation device for a vehicle is proposed in Japanese Patent Publication No. 4-34082. FIG. 6 is a configuration diagram showing a conventional navigation device. In FIG. 6, reference numeral 1 denotes a signal processing unit. The signal processing unit 1 includes a distance detection unit 2 that outputs a signal corresponding to the moving distance of the moving body, and an azimuth detection unit 3 that outputs a signal corresponding to the moving direction of the moving body. The calculation is performed based on the signal of (1), and the position data on the two-dimensional coordinates is calculated. The position data calculated in this way is stored in the traveling locus storage device 6, and is used as position information corresponding to the current position of the moving object. Reference numeral 7 denotes an information storage device, which stores map information and the like in advance, and sends the information to the signal processing unit 1 as necessary. Reference numeral 5 denotes a display unit, and the display unit 5 is constituted by a display such as a CRT or a liquid crystal, and displays a map image, a current position of a moving object, a locus of a route to the present, and the like to visually provide a user with movement information. Is what you do. The operation unit 4 sends a command from a user to the signal processing unit 1. Then, based on a command from the user via the operation unit 4, the direction of the map and the traveling locus displayed on the display unit 5 is changed according to the signal output from the signal processing unit 1, the movement of the display position, the map and the traveling are performed. The display of a partially enlarged view of the trajectory is appropriately changed.

This navigation apparatus sets and changes the display mode of a map (for example, when an intersection is approaching, etc., sets and changes the display mode of the map and displays an enlarged view of the intersection), thereby enabling the user to view the map. In order to improve safety, the labor required for the driver's screen recognition is reduced. However, with conventional navigation devices,
Since the map information of the departure point and the destination and the pseudo form of the intersection are displayed, the driver was still guided after seeing the very difficult screen of the map information.

[0005]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems, and displays a scene near a destination on a display unit and highlights an object so as to be accurate and easy to understand. It aims to provide a safe navigation device.

[0006]

In order to solve the above-mentioned problems, in the navigation device of the present invention, map information, image information near the destination, and other information are stored in advance in a storage medium of a storage unit having a storage capacity of 5 GB or more. Record necessary information, input easily inputtable information such as name or telephone number by input means, search address by search means based on the input information, and map information of a predetermined area based on the searched address. Is displayed on the display screen, and video information of the target is displayed when the destination is within a predetermined distance.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 is a storage unit for storing a storage medium having map information and image information recorded in advance and having a storage capacity of 5 GB or more, and input means for inputting information. A search unit for searching information in the storage unit based on the information input by the input unit; a display unit including a display screen for displaying a result searched by the search unit in a predetermined format; A moving distance calculating means for calculating a moving distance, a moving azimuth calculating means for calculating a moving azimuth of the moving body, a position of the moving body based on an output of the moving distance calculating means and an output of the moving azimuth calculating means. A position detection unit, and reads map information of a predetermined area from the storage unit based on the moving body position information from the position detection unit, and displays a screen of the position of the moving body and the map information. Display signal processing means for displaying on the display means, a large amount of image information, customer information, etc., in addition to information necessary for navigation such as digital map information, can be stored in one storage medium. In addition, accurate, easy-to-understand and safe navigation can be performed.

According to a second aspect of the present invention, there is provided a storage unit for storing a storage medium in which map information and image information are recorded in advance and has a storage capacity of 5 GB or more, input means for inputting information, Search means for searching information in the storage unit based on information input by means, search means for searching for a route around the destination based on information on the destination searched by the search means, Display means having a display screen for displaying a search result and a result searched by the search means in a predetermined format; a movement distance calculation means for calculating a movement distance of the moving body; and a movement for calculating a movement direction of the moving body. A position detecting unit that calculates the position of the moving object based on the outputs of the azimuth calculating unit and the moving distance calculating unit, and the output of the moving azimuth calculating unit; Display signal processing means for reading the map information of a predetermined area from the storage unit on the basis of and displaying the screen of the position of the moving object and the map information on the display means. In addition to the information necessary for navigation, a large amount of image information and customer information can be stored in one storage medium, and the optimal visit route can be set, so that it is accurate, easy to understand, safe and optimal Navigation can be performed.

According to the third aspect of the present invention, since the storage medium stored in the storage unit stores the image of the target as image information, the image of the target can be used for navigation. Therefore, it is possible to reliably guide to the destination.

According to a fourth aspect of the present invention, the storage medium of the storage unit is a digital versatile disk, and the read head reads data from the storage medium in a non-contact manner with the storage medium. The possibility that the information stored in the recording medium is lost due to the contact between the recording medium and the reproducing head, and store a large amount of image data and customer information in one storage medium in a rewritable manner. Accurate, easy-to-understand and safe navigation.

According to a fifth aspect of the present invention, the storage medium of the storage unit is rewritable, so that the image data of the building when there is a large change in the appearance of the building or the map when the road is newly established. The data can be easily handled simply by changing or adding to the conventional stored data.

According to the sixth aspect of the present invention, since the storage medium stored in the storage unit is replaceable, fine guidance can be performed, and only the storage medium can be carried. Information can be input to other devices.

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a navigation device according to a first embodiment of the present invention, FIG. 2 is a conceptual diagram of a navigation device according to the first embodiment of the present invention, and FIG. FIG. 3 is a diagram illustrating a coordinate system of a moving object according to the first embodiment. In FIG. 1, reference numeral 90 denotes a moving body such as an automobile (see FIG. 2);
Reference numeral 110 denotes a position detection unit that detects the position of the moving body 90. The position detection unit 110 includes the following. An acceleration sensor 101 detects the acceleration of the moving body 90, a gyro sensor 102 detects the angular velocity of the moving body 90, 103
Is a moving distance calculating means for calculating the moving distance of the moving body 90 from the output data of the acceleration sensor 101; 104 is a moving direction calculating means for calculating the moving direction of the moving body 90 from the output data of the gyro sensor 102; It is a calculating means for calculating the position of the moving body 90 from the calculation results of the means 103 and the moving direction calculating means 104.

Reference numeral 91 denotes a signal for operating the apparatus, a customer name,
An input means for inputting information such as a telephone number and an address. The input means 91 is directly input manually via a communication line using a keyboard, a touch panel, a modem or the like, or via a recording medium on which information is recorded. Input may be performed.

Reference numeral 92 denotes an LCD (Liquid Crystal Displa)
y), display means having a display screen such as a CRT, FED (field emission display) or a display using an electroluminescent element (hereinafter referred to as an EL display). The display means 92 is a signal processing unit 120 (described later). Is displayed in a predetermined format. In particular, for the display means 92, the organic E
It is preferable to use an L display. because,
Organic EL displays are very thin and lightweight,
It is possible to arrange it along the curved surface of the windshield. Therefore, space for installing the display can be saved. In addition, it is possible to check the screen without distracting the line of sight from the viewpoint during normal driving.

A storage unit 130 stores map information, video information, customer information, and the like.
gital versatile disk) etc. at least 3GB or more,
It is preferable to use a storage medium having a storage capacity of preferably 5 GB or more. The storage unit 130 includes the following. 131 is a map information storage means for storing digitized map data in advance, 132 is a video information storage means for storing video data such as predetermined scenery, and 133 is necessary information such as a customer's name, telephone number, and address. 134 is input information storage means for storing information input by the input means 91, 135
Is a processing signal storage unit for storing a signal processed by the signal processing unit 120 (described later).

Reference numeral 120 denotes information input by the input means 91;
A signal processing unit that performs signal processing on an output signal and the like of the position detection unit 110, and the signal processing unit 120 includes the following. 121 is a search unit that searches for information and the like in the storage unit 130 according to a signal, an instruction, and the like input by the input unit 91;
Reference numeral 122 denotes a route from the departure point input by the input means 91 to the return point through the destination to the return point.
When the position information of the mobile unit 90 is obtained from the arithmetic unit 105, the search unit 123 reads the map data of a predetermined area from the map information storage unit 131 and searches the position of the mobile unit 90. The position signal processing means 124 displayed on the display means 92 together with the search means 12
1. Display signal processing means for performing display signal processing according to a predetermined format based on signals, information, and the like processed by the search means 122, the position signal processing means 123, and the like.

FIG. 2 is a schematic view showing a vehicle mounted on the navigation apparatus according to the first embodiment of the present invention, in which a moving body 90 (here, a car) is viewed from directly above. ing. As shown in FIG.
1 is the traveling direction of the moving body 90 (X-axis direction in FIG. 3)
The gyro sensor 102 is arranged on the moving body 90 so as to be able to detect the acceleration of the moving body 90 and the angular velocity of the moving body 90 around the vertical axis (Z axis in FIG. 3).

FIG. 3 is a diagram showing a coordinate system of a moving object according to the first embodiment of the present invention. As shown in FIG. 3, the X axis is set in the traveling direction of the moving body 90 in the horizontal plane, the Y axis is set in a direction perpendicular to the X axis, and the Z axis is set in the direction of gravity of the moving body. In the following description, the operation of the moving body 90 around the X axis is referred to as a roll operation, and the angle at which the moving body 90 is rotated by the rolling operation is referred to as a roll angle θx. Similarly, the operation of the moving body 90 around the Y axis is called a pitch operation, the angle at which the moving body 90 is rotated by the pitch operation is called a pitch angle θy, and the operation of the moving body 90 around the Z axis is called a yaw operation. Is referred to as the yaw angle θz. Since the yaw angle θz indicates a change in the traveling direction of the moving body 90, it is also referred to as a moving azimuth θz.

With respect to the navigation device configured as described above, the acceleration sensor 101 and the gyro sensor 1
02 from the output data of the moving body 9
The operation for finding the position of 0 will be described.

As shown in FIG. 1, data is output from the acceleration sensor 101 and the gyro sensor 102 to the calculating means 105 at a predetermined time period Δt. Note that output data from the acceleration sensor 101 and the gyro sensor 102 are input to the arithmetic means 105 as digital data via an A / D (Analog to Digital) converter (not shown). The calculation means 105 converts the output data of the acceleration sensor 101 into acceleration axn and the output data of the gyro sensor 102 into angular velocity ωzn.

First, the moving distance calculating means 103 calculates the acceleration a
When xn is obtained, the velocity vxn of the moving body 90 is calculated by (Equation 1). Where the speed at time n is vxn and the acceleration is a
xn, a time period for obtaining output data from the acceleration sensor 101 is Δt, and vx0 is an initial speed.

[0023]

(Equation 1)

When the velocity vxn of the moving body 90 in the time period Δt is obtained by (Equation 1), the moving distance calculating means 103 obtains the moving distance ΔDn of the moving body 90 in the time period Δt by (Equation 2).

[0025]

(Equation 2)

The moving direction calculating means 104 calculates the angular velocity ω
When zn is obtained, the moving object 9 in the time period Δt is obtained from (Equation 3).
A moving direction θzn of 0 is obtained.

[0027]

(Equation 3)

The calculating means 105 calculates the moving distance ΔDn and the moving direction θzn at time n by using the moving distance calculating means 103
And the moving azimuth calculating means 104, respectively, the cumulative operation from the initial position (x0, y0) is executed using (Equation 4) and (Equation 5), whereby the position (xn , Yn).

[0029]

(Equation 4)

[0030]

(Equation 5)

When the position (xn, yn) of the moving body 90 is determined, the position signal processing means 123 stores the position of the moving body 90 obtained by the calculating means 105 in the map data storage means 131 if necessary. The data is converted into the upper coordinate system, the position of the moving body 90 is marked on the map data, and output to the display means 92.

As described above, in the present embodiment, the moving distance of the moving body 90 in the predetermined time period Δt can be obtained from the output data of the acceleration sensor 101. The position of 90 can be obtained, and a navigation device that does not particularly require wiring work can be realized.

Here, in the above description, the moving direction of the moving body 90 is obtained from the output data of the gyro sensor 102, but a method of obtaining the moving direction using an acceleration sensor instead of the gyro sensor 102 may be used. Alternatively, a GPS may be used instead of the acceleration sensor 101 or the gyro sensor 102. Or acceleration sensor 101
Instead of the gyro sensor 102, a distance sensor and a direction sensor may be used as in a conventional example.

Next, the storage unit 130 in the navigation device according to the present embodiment will be described in detail. In the present embodiment, at least 3G
By using a large-capacity storage medium having a capacity of B or more, preferably 5 GB or more, a large amount of image data can be accommodated in one storage medium in addition to data necessary for navigation such as digital map data. Therefore, it is possible to perform guidance display or the like that is easy to understand and confirm using the video from the image data in the navigation. Here, as the image data, the video near the residence of the customer is recorded in the storage unit 130 in advance. That is, regarding the customer's residence, a still image or a moving image is shot from the actual traveling position of the car in all the approach directions,
This is converted into digital data and recorded in advance in the video information storage means 132 of the storage unit 130. When the moving body approaches the predetermined customer's residence, a still image near the customer's residence according to the approach direction is obtained. Alternatively, a moving image can be read from the video information storage unit 132 and displayed on the display unit 92.

Here, assuming that there are two directions of approach at one customer's residence (ie, facing a general road), at least two images are required for one customer's residence. Become. When compressing color still image data and storing it in a storage medium, the data size is 2 per image.
Since it is considered to be about 5 KB, it can be estimated that the data size of one customer's residence is about 50 KB. Therefore, it is expected that a considerable amount of customer's residence can be covered if the remaining capacity after storing data necessary for navigation such as digital map data (up to about 1 GB) is 2 GB or more. Further, if the remaining capacity is 4 GB or more, an image or a moving image of the nearest intersection of the customer's residence can be recorded, so that accurate, easy-to-understand and safe navigation can be performed, which is more preferable.

As described above, 3 GB or more, preferably 5 GB
Storage unit 1 storing the storage medium having the above large storage capacity
The use of 30 makes it possible to perform navigation using video, which has been difficult in the past. For example, when approaching a predetermined place, a screen corresponding to the approach direction of the predetermined place can be automatically displayed on the display means 92, so that a complicated input operation is not required, which is simple, convenient, and An easy-to-understand navigation device can be provided.

Further, as the storage medium of the storage section 130 used here, it is preferable to use a storage medium capable of reproducing information without contact. As a result, the possibility that the information stored in the recording medium is lost due to the contact between the recording medium and the reproducing head can be almost eliminated,
The reliability of the navigation device can be further improved. As such a recording medium, it is preferable to use an optical disk, such as a DVD, which is capable of non-contact reading by an optical head and has a large storage capacity. Further, it is preferable to use an optical disk having a diameter of 120 mm or less. Because, when the diameter is 120 mm or less, even when the size of the storage unit 130 storing the recording medium is determined so as to be suitable for a console box of an automobile that has a particularly high demand for a navigation device among mobile objects. Since it is possible to design with a relatively high degree of freedom with a relatively large margin, it is possible to adopt a device incorporating many anti-vibration structures for avoiding problems such as vibrations peculiar to a moving body, and to read out information from a navigation device. This is because reliability at the time can be improved.

Further, it is preferable that the storage medium used for the storage unit 130 is rewritable. Because, for example, a building that was built near the customer's residence was rebuilt or there was a major change in the appearance of the customer's residence, video data around the customer's residence or a map when a new road was built Since data can be dealt with simply by changing or adding to conventional storage data, a navigation device with a high expandability can be realized, and it is almost unnecessary to purchase a new storage medium. This is because it can be reduced.

It is preferable that the storage medium stored in the storage unit 130 be replaceable from the storage unit 130. In this manner, for example, after the vehicle has been guided to a rough destination with a storage medium storing map data of the national version and arrived near the destination, the storage medium stored in the storage unit 130 is stored in the storage unit 130. It is possible to perform a fine-grained guidance by replacing with a storage medium storing detailed map data specialized for the ground, so that a very convenient navigation device can be realized. Further, in the case of the rewritable storage medium described above, it is only necessary to carry the storage medium without having to carry the entire storage unit 130 for rewriting. Can be improved. Further, even when the moving body is replaced, it can be easily coped with by replacing the recording medium.

FIG. 4 is an operation flowchart of the car navigation system according to one embodiment of the present invention. In FIG.
Predetermined necessary items such as a customer name, a baggage name, and a fee are input from the input means 91 (step 1). The search unit 121 searches the map information of the map information storage unit 131 based on the input customer name, telephone number, address, and the like, and searches the storage unit 1.
The input information is stored in the input information storage means 134 of step 30 (step 2). The search means 122 searches for the optimal visit route based on the map information of the destination searched by the search means 121 to determine the order of visits of the customer, and the display signal processing means 124
Performs signal processing on the map information of the visited route based on the display format, displays the result on the display means 92, and stores the processed signal in the processed signal storage means 135 (step 3). At this time, the optimum route is appropriately determined in consideration of the minimum distance route, the road condition, the shortest time route in consideration of the traffic condition, the desired visit time of the customer, the cargo handling condition, and the like. Next, the moving body 9
0 is operated according to the displayed route (step 4). The position detection unit 110 includes the acceleration sensor 101 and the gyro sensor 10
Based on the data of 2, the moving distance and the moving direction are detected by the moving distance calculating means 103 and the moving direction calculating means 104, and the position of the moving body 90 is calculated and calculated by the calculating means 105. Moving body 90
When the position information is obtained, the map data of a predetermined area is read out from the map information storage means 131, the necessary information such as the traveling direction and the position of the moving body 90 are appropriately displayed on the display means 92, and the processing signal is stored in the processing signal storage. It is stored in the means 135 (step 5). The position signal processing unit 123 compares the destination stored in the storage unit 130 with the current position detected by the position detection unit 110, and determines whether the destination is within a predetermined distance (step 6). If the destination does not exist, the flow returns to step 5 to guide the moving body 90. On the other hand, if the destination exists, the position signal processing means 1
23 calculates the distance to the destination and the approach direction, and the search means 121 searches a predetermined image from the video information storage means 132 based on data such as the destination, the distance to the destination, and the approach direction to the destination. It is displayed on the display means 92 (step 7). Upon arrival at the destination, the customer information storage means 13
From step 3, information such as the name of the package to be delivered, the number of items, the business, etc. relating to the customer at the destination is retrieved and displayed on the display means 92 (step 8). If the destination remains, the flow returns to step 4 to move the mobile unit 90 to the next destination in accordance with the guidance of the navigator device and perform the task (step 9). When all the destinations have been visited, the current work ends.

When displaying an image near the customer's residence, the target building can be highlighted by drawing smoke on the surrounding scenery, flickering the customer's residence, or displaying a frame. .

The image near the customer's residence is automatically and appropriately displayed on the display means 92, but can be manually displayed and deleted as needed.

As described above, when the user approaches the destination, the image of the vicinity of the residence of the target customer can be displayed, so that not only the guidance on the navigation device but also the user should visit. Since the building can be recognized in the video, the driver can safely and reliably find the target building even in a confusing building, a condominium, or even if the navigation device itself has an error. Can be less likely to get lost.

Next, one principle of the route search by the navigation device according to the embodiment of the present invention will be briefly described. The map data stored in the storage medium stored in the storage unit 130 includes points on roads, bends, and intersections as node information, in which a road is a straight line (link) connecting the points. ), And each link is given a road distance or a transit time. First, all nodes directly connected to the starting point such as the departure point or the current position are stored as registration candidates. The node with the shortest distance is registered. Next, the node directly connected to the registration node registers the node having the shortest distance from the origin node in addition to the registration candidates. By repeating this, the registered node always becomes the node of the shortest distance from the origin node among all the candidate nodes. Then, the route connecting the registered node and the destination node when the destination node becomes the candidate node is the shortest route. The above is one simple principle of the route search.

At this time, a hierarchy is provided in the map data, and the map data is limited to a main road such as a main road or an expressway in a higher hierarchy, and the shortest route from both the departure place and the destination to the main road is set. It is preferable to calculate the route by calculating. In this route search, the shortest distance route search and the like can be performed in addition to the shortest distance route search by considering traffic congestion information and the like from the VICS or the like.

FIG. 5 is a diagram showing a display screen of a route search result according to an embodiment of the present invention. This may be input by the user through the input means 91. In FIG. 5, A is a departure and return position of the mobile unit 90,
B, C, D, and E are destinations input by the user through the input unit 91. Further, a dotted line in the figure indicates a route displayed as a result of the route search.

[0047]

According to the present invention, a navigation device includes a moving distance calculating means for calculating a moving distance of a moving body, a moving azimuth calculating means for calculating a moving azimuth of the moving body, an output of the moving distance calculating means and a moving azimuth. Calculating means for calculating the position of the moving body based on the output of the calculating means and outputting moving body position data, and storing a storage medium which stores map data and image data in advance and has a storage capacity of 5 GB or more. A display unit having a display unit for displaying information, a display unit having a display screen for displaying information, and a screen for reading the map data of a predetermined area from the storage unit based on the mobile unit position data from the arithmetic unit and displaying the position of the mobile unit and the map data. And a signal processing unit that causes the display means to display a large amount of images (for example, images near a customer's residence) stored in a storage medium.
Can be displayed on the display means according to the situation,
It is possible to make the navigation device easier to recognize, that is, easier to use.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a navigation device according to a first embodiment of the present invention.

FIG. 2 is an in-vehicle conceptual diagram of the navigation device according to the first embodiment of the present invention.

FIG. 3 is a diagram showing a coordinate system of a moving object according to the first embodiment of the present invention;

FIG. 4 is an operation flowchart of the car navigation device according to the embodiment of the present invention.

FIG. 5 is a view showing a display screen of a route search result according to the embodiment of the present invention;

FIG. 6 is a configuration diagram showing a conventional navigation device.

[Explanation of symbols]

 Reference Signs List 90 moving body 91 input means 92 display means 101 acceleration sensor 102 gyro sensor 103 moving distance calculating means 104 moving azimuth calculating means 105 calculating means 110 position detecting section 120 signal processing section 121 searching means 122 searching means 123 position signal processing means 124 display signal Processing unit 130 Storage unit 131 Map information storage unit 132 Video information storage unit 133 Customer information storage unit 134 Input information storage unit 135 Processing signal storage unit

Claims (6)

[Claims] A storage unit for storing map information and image information in advance and storing a storage medium having a storage capacity of 5 GB or more, input means for inputting information, and information input by the input means. Search means for searching for information in the storage unit based on the information, display means having a display screen for displaying the result searched by the search means in a predetermined format, travel distance calculation means for calculating the travel distance of the moving body, A position detection unit that calculates a position of the moving object based on an output of the moving direction calculation unit and an output of the moving distance calculation unit and an output of the movement direction calculation unit, and a position detection unit that calculates a position of the moving object. Display signal processing for reading map information of a predetermined area from the storage unit based on moving body position information, and displaying the position of the moving body and a screen of the map information on the display means Navigation apparatus characterized by comprising a stage. 2. A storage unit for pre-recording map information and image information and storing a storage medium having a storage capacity of 5 GB or more, an input means for inputting information, and an information input means for inputting information. Search means for searching for information in the storage unit based on the search information, search means for searching for a route around the destination based on information on the destination searched for by the search means, results searched by the search means, and the search means Display means having a display screen for displaying the result of the search in a predetermined format, moving distance calculating means for calculating the moving distance of the moving body, moving azimuth calculating means for calculating the moving direction of the moving body, and the moving distance A position detection unit that calculates the position of the moving object based on the output of the calculating unit and the output of the moving direction calculation unit; and the storage unit based on the moving object position information from the position detection unit. Navigation apparatus is characterized in that a display signal processing means for displaying on said display means a screen position and the map information of the movable body reads the map information of a predetermined area. 3. The image information recorded in the storage unit is a target object and is highlighted.
Or the navigation device according to 2. 4. A digital versatile disk according to claim 1, wherein a storage medium of said storage unit is a digital versatile disk.
3. The navigation device according to any one of 3. 5. The navigation device according to claim 1, wherein a storage medium of the storage unit is rewritable. 6. The navigation device according to claim 1, wherein a storage medium of the information storage means is replaceable.