JPH04362683A - Road map generating method of navigation system - Google Patents

Abstract

PURPOSE:To update existent map data by adding road data on a part whose actual road state is different from a displayed map to the existent road data when the actual road state is different from the displayed map. CONSTITUTION:A road memory 8 is connected additionally to a position detection unit 5. When a driver wants to write a road not shown in the existent map data, read out of a CD-ROM 9, in a map, a road memory switch on an operation device 3 is pressed to write the road in the road memory 8, which can be accessed as a new map from the operation device 3 as well as the map data in the CD-ROM 9. When the driver travels on a new road which is not shown in the map data during a drive while the existent map data is displayed, the travel trace of the new road is displayed distinctively in different form travel traces of other roads on a display device 2. Data on the new road is stored in the additionally provided road memory 8 when necessary and when the driver travels at the same place next time, the new road data stored in the road memory 8 is displayed as well as the existent map data.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for creating map information used in a vehicle navigation system.

0002

2. Description of the Related Art FIG. 2 is a block diagram showing the configuration of a conventional in-vehicle navigation system. As shown in the figure, a conventional navigation system includes a display device 2 for displaying map data on a man-machine interface unit 1 that interfaces with the driver, and a display device 2 for displaying map data and the current position of the vehicle. An operating device 3 is connected thereto for performing operations for controlling the screen. Furthermore, a position detection unit 5 for detecting the self-position of the vehicle is also connected.

Connected to the position detection unit 5 are a distance sensor 6 for detecting the distance traveled and a direction sensor 7 for detecting the direction of the own vehicle. Further, a CD-ROM driver 4 for reading map data from a CD-ROM 9 storing map data is connected between the man-machine interface unit 1 and the position detection unit 5.

[0004] In the in-vehicle navigation system having the above configuration, while driving, map data stored in the CD-ROM 9 is read out by the operating device 3 via the CD-ROM driver 4, displayed on the display device 2, and read out from the position detection unit 5. The current position of the vehicle is displayed superimposed on the map data on the display device 2, and the user drives while checking his or her own vehicle position on the map data. Therefore, in an in-vehicle navigation system, the preparation of map data is extremely important.

[0005] Existing map data needs to be updated as actual road conditions change over time.
Currently, the preparation of these map data is delayed. Also, CD-ROM9 used in current navigation systems.
Because it is not always easy to input additional data such as new roads into existing map data with solid-state memory such as Until it was created, the only way to operate was to use map data as is, even if it differed from the actual road conditions.

[0006]

[Problems to be Solved by the Invention] However, in such conventional navigation systems, when driving in the same location, the content displayed on the display device differs from the actual road condition, causing anxiety and anxiety to the driver. There is a problem with causing discomfort. Another problem is that map data cannot be easily updated even if the content on the display device differs from the actual road.

The present invention has been made to solve the above-mentioned problems, and eliminates anxiety and discomfort for the driver.If the actual road condition differs from the displayed map data, the road data for that part An object of the present invention is to provide a method for creating a road map in a navigation system that allows updating of existing map data by adding information to the existing map data.

[0008]

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention provides a first memory that stores existing map data and a second memory that stores newly created and added road map data. It has a memory and a display device that displays map data stored in the first and second memories, and displays the existing map data stored in the first memory on the display device to show the traveling trajectory. Displayed on the road while driving,
When driving on a new road that is not included in existing map data, the new road is identified and displayed on the screen of the display device so as to be different from the driving trajectory of other roads,
The data of the new road is stored in the second memory, and the existing map data of the position to which the new road belongs is stored in the first memory.
When displayed on the display device from the memory, the data of the new road stored in the second memory is also displayed.

[0009]

[Operation] In the present invention, when driving on a new road that is not on this map data while displaying existing map data, the traveling trajectory of the new road is displayed on the display device along with the traveling trajectory of other roads. are identified in different ways. Then, if necessary, this new road data is stored in a separate memory,
The next time the vehicle travels to the same location, the existing map data will be displayed as well as the new road data stored in this memory. This allows the map data of the new road to be added to the existing map data, allowing the map data to be updated.

0010

Embodiments Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 3 shows a block diagram of a navigation system to which the present invention is applied. In this navigation system, a display device 2, an operating device 3, and a position detection unit 5 are also connected to a man-machine interface unit 1, and a distance sensor 6 and a direction sensor 7 for detecting the direction of the own vehicle are connected to the position detection unit 5. is connected, and furthermore, a CD-ROM driver 4 for reading map data from a CD-ROM 9 is connected between the man-machine interface unit 1 and the position detection unit 5, which is the same as the conventional example shown in FIG. It is.

In this navigation system, a road memory 8 is separately connected to the position detection unit 5. If the driver wishes to write a new road on the map for a road that is not included in the existing map data read out from the CD-ROM 9, the driver can press a road memory switch (not shown) provided on the operating device 3. This map is written into the road memory 8 so that it can be accessed as a new map from the operating device 3 in the same way as the map data in the CD-ROM 9.

FIG. 1 shows the flow of display on the display device 2 according to the present invention. First, when power is supplied to the in-vehicle navigation system, it exits the ready state and begins checking map operation.

First, it is checked whether or not map data stored on the CD-ROM 9 is to be searched, that is,
Existing map ready is performed (step ST1). When searching, perform a road search on the designated map (step ST2).
), if the search is not successful, the search returns to the initial state. If the search is successful, a display operation is performed on the display device 2 (step ST3), and the map is displayed on the screen of the display device 2.

On the other hand, if the existing map is not ready, that is, if the map data on the CD-ROM 9 is not searched, a check is made to see if there is a road map write command to be described later (step ST4). If this command is not present, the search returns to the initial state. If there is a road light command, the new road map on the display device 2 is stored in the road memory 8 (step ST5).
.

When storing, as described above, by pressing the road memory switch provided on the operating device 3, the data temporarily stored in the position detection unit 5 is transferred to the road memory 8 and stored. be done. Note that as the road memory 8, an EEPROM, various RAMs using power backup, various magnetic memories, etc. can be used.

Next, the issuance of the road map write command will be explained. FIG. 4 shows a CD- displayed on the display device 2.
This shows part of the map data on the ROM9. Further, FIG. 5 shows a case where the vehicle travels along the map displayed in FIG. 4 along a traveling trajectory P1 indicated by a dotted line in the figure.

Here, the actual road is indicated by the dotted line R in FIG. 6, and when traveling along the travel trajectory P2 indicated by the dotted line in FIG. Above, it is displayed separately from other travel trajectories, for example, P1. Therefore, this differentiated travel trajectory P2 is
It will show roads that are not on the M9.

This road data is stored, for example, in a memory area within the position detection unit 5, and when the road memory switch provided on the operating device 3 is pressed at this point, a road map write command is issued and the position detection unit 5 is stored. unit 5
The road data stored in the road memory 8 is transferred to the road memory 8. The contents stored in this road memory 8 will be stored on the next CD-
When the existing map data from ROM 9 is accessed, it is accessed together. As a result, the actual road R is displayed superimposed on the existing map data as shown in FIG. As a result, the road map data will actually be updated.

[0020]

Effects of the Invention As described above in detail based on the embodiments, the present invention makes it possible to practically add new road data to existing map data, so that when the driver is driving the vehicle, the driver can see the roads that are actually close to the road. Be able to run. In addition, when the driver travels to the same location next time, he does not have to worry about the divided travel trajectory on the screen. Furthermore, the latest CD-RO
There is an advantage that data stored in the road memory 8 can be used as data when creating M.

[Brief explanation of drawings]

FIG. 1 is a flowchart showing a display flow in the present invention.

FIG. 2 is a configuration block diagram showing a conventional navigation system.

FIG. 3 is a block diagram showing the configuration of a navigation system to which the present invention is applied.

FIG. 4 is a road map showing part of map data in a CD-ROM.

FIG. 5 is a diagram showing a traveling trajectory of the road in FIG. 4;

FIG. 6 is a diagram showing an actual road R that is not included in existing map data.

FIG. 7 is a diagram showing a travel trajectory on an actual road R.

[Explanation of symbols]

1 Man-machine interface unit 2 Display device 3 Operating device

Claims (1)

[Claims] 1. A first memory storing existing map data, a second memory storing newly created and added road map data, and map data stored in the first and second memories. a display device that displays the existing map data stored in the first memory, and causes the display device to display the existing map data stored in the first memory to display the travel trajectory on the road. When driving on a new road that is not covered by a new road, the new road is displayed on the screen of the display device to distinguish it from the driving trajectory of other roads, and the data of the new road is stored in the second memory. and when the existing map data of the position to which the new road belongs is displayed on the display device from the first memory, the data of the new road stored in the second memory is also displayed. A road map creation method in a navigation system characterized by displaying a road map.