JPH05165405A - Map data adding method for navigation system - Google Patents

Abstract

PURPOSE:To prevent the position of the endpoint of a read to be stored newly in a storage means from being deviated from storage data stored as road data by retrieving the presence/absence of the storage data, and applying endpoint correction by substituting a start point position and an end point position on map coordinates for the storage data when it exists. CONSTITUTION:The start point position and the end point position on screen coordinates are coordinate-transformed to the map coordinates. A display control ECU 14 retrieves whether or not the storage data of the road stored in a floppy disk(FD) as map data in the neighborhood of the start point position and the end point position after coordinate transformation. As a result of retrieval, an error message is displayed on a CRT 17 when no storage data exists, and the storage data when it exists is substituted as the start point position and the end point position on the map coordinates, respectively, and the start point position and the end point position on the map coordinates are stored in the FD as the road data.

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 the current position calculated based on the outputs of a geomagnetic sensor and a vehicle speed sensor on a map displayed on a display means, not on the displayed map. The present invention relates to a map data addition method for a navigation system, which newly writes road data in a storage means.

[0002]

2. Description of the Related Art Generally, a navigation system is constructed as shown in FIG. 4, in which a navigation ECU 3 calculates a current position of a vehicle based on a azimuth signal from a geomagnetic sensor 1 and a traveling distance signal from a vehicle speed sensor 2, and a storage means. The map data of the section including the current position of the vehicle is read out from the map data stored in advance in 4, and the map based on the read map data is displayed on the screen of the CRT 5. In FIG. 4, reference numeral 6 denotes an operation key unit including a plurality of operation keys.

By the way, in this type of navigation system, the storage means 4 is a writable type such as a floppy disk, and road data such as side roads and new roads which are not included in the map data are stored by operating the operation key section 6. Some have a handwriting function that can be written in the means 4.

For example, as shown in FIG. 5, when two intersecting roads R ₁ and R ₂ are displayed on the map, they are not included in the map data of the storage means 4 and are not displayed on the map. When the road R ₃ is newly input as road data, when the current position of the vehicle is at the start point P _S of the road R ₃ , the current position is stored as a start point position by operating the operation key unit 6, When the current position of the host vehicle is at the end point P _E of the road R ₃ , the current position is stored as an end point position by key operation, and one or more line segment data connecting the start point position and the end point position is stored. To remember.

[0005]

However, the data of the roads R ₁ and R ₂ stored in the storage means 4 is the data shown by the solid lines in FIG. 5, and when displayed on the CRT 5,
As shown by the one-dot chain line and two-dot chain line in the figure, roads R ₁ and R
_Since it has a predetermined width centered on the data of ₂ ,
When the start point P _S and the end point P _E of the new road R ₃ are input, the start point P _S and the end point P _E may deviate from the solid line as shown in FIG. 5, and thus the newly stored start point position and end point P _E are stored. If the position deviates from the already remembered road line,
Road data will be lost during the gap, and the road data newly stored in the storage means 4 cannot be used as detected position correction data thereafter.

Therefore, the present invention has been made to solve the above problems, and the position of the end point of the road newly stored in the storage means does not deviate from the stored data already stored as road data. The purpose is to do so.

[0007]

A map data adding method for a navigation system according to the present invention calculates a current position of an own vehicle by a position detection control means based on outputs of a geomagnetic sensor and a vehicle speed sensor, and a display control means, A navigation system for reading out the necessary data from the map data stored in advance in the writable storage means, displaying the map on the screen of the display means, and displaying the calculated current position. In the map data adding method of the navigation system for writing road data such as roads which is not included in the map data into the storage means by key operation of the operation key unit, when the own vehicle is at the start point and the end point of the road to be written, the operation is performed. The screen display displayed on the screen of the display means by operating the keys of the key section. Roads that are already stored as the map data in the vicinity of the start point position and the end point position after the coordinate conversion, respectively, by converting the upper start point position and the end point position into the map coordinates of the map developed based on the map data. Whether or not there is stored data, and if there is stored storage data as a result of the search, the searched storage data is replaced with the start point position and the end point position in the map coordinates, and the start point position and the end point position in the map coordinates are replaced. The end point is corrected, and the start point position and the end point position after the end point correction are stored in the storage means as the road data.

[0008]

In the present invention, the start point position and the end point position on the screen coordinates are coordinate-converted into map coordinates, the presence or absence of stored data of roads near the converted start point position and end point position is searched, and the stored data is stored. For example, since the stored data is replaced with the start point position and the end point position in the map coordinates and the end point correction is performed, the position of the end point of the road newly stored in the storage means is already stored as road data. The deviation from the data is prevented.

[0009]

1 is a flow chart for explaining the operation in an embodiment of a map data adding method for a navigation system according to the present invention, FIG. 2 is a block diagram of an applicable navigation system, and FIG. 3 is an operation explanatory view.

First, the navigation system will be described. As shown in FIG. 2, it serves as a position detection control means based on the azimuth signal obtained from the geomagnetic sensor 11 and the traveling distance signal obtained from the driven wheel speed sensor 12 which is a vehicle speed sensor. The position detection ECU 13 calculates the current position of the vehicle, and the calculated current position data is used as the position detection ECU 13
Is transmitted to the display control ECU 14 as display control means. In addition, 15 receives the signal output from the sign post and detects the position data of the sign post by the position detection ECU 1.
3 is a receiving circuit that sends the data to the receiver.

On the other hand, on the display side, a floppy disk drive (hereinafter referred to as FDD) device 16 drives a floppy disk (hereinafter referred to as FD) as a writable storage means for storing map data, and the display control EC
U14 reads the map data of the section including the current position of the own vehicle from the map data, and the map based on the read map data is displayed on the screen of the CRT 17 as display means by the control of the display control ECU 14.

Further, the operation key portion 18 has an FDD device 16
And a control key for the display screen of the CRT 17 are provided. When any one of these control keys is operated,
The key discriminating unit 19 of the display control ECU 14 discriminates which key has been operated, the display control ECU 14 controls the FDD device 16 according to the operated key, and the display screen of the CRT 17 is switched. ..

Further, the operation key section 18 has a mode setting handwritten key for inputting road data such as side roads and new roads which are not included in the map data, as well as input setting of start point position and end point position of the road to be input. There is a middle point key and an end point key for operation, the operation of the middle point key is used to set the input of the start point and the input of the intermediate point between the start point and the end point, and the operation of the end point key Input settings are made.

When newly writing road data in the FD, the handwriting key of the operation key unit 18 is operated to enter the handwriting mode. When the vehicle is at the starting point of the road to be input, the one-dot chain line in FIG. The current position displayed on the screen (hatched portion) of the enclosed CRT 17 is the starting point, and the starting point on this screen is recognized and displayed as the starting point position in the screen coordinates by the display control ECU 14, and the middle point key is operated. The display control ECU
The start point position on the screen coordinates displayed on the screen of the CRT 17 is converted by 14 into the map coordinates of the developed map as shown by the solid line in FIG. 3 based on the map data stored in the FD.

On the other hand, when the own vehicle is at the end point of the road to be input, by operating the end point key, the display control ECU 14 causes the CRT 17 to operate as in the case of the start point.
The end point position on the screen coordinates displayed on the screen is converted into the map coordinates of the map developed based on the map data stored in the FD.

Next, the display control ECU 14 searches for whether or not there is road storage data already stored in the FD as map data near the start point position and the end point position after coordinate conversion, and the search result storage data is searched. If there is not, an error message is displayed on the CRT 17, and if there is stored data, the stored data is replaced with the start point position and end point position in map coordinates, and the start point position and end point position in map coordinates are stored in the FD as road data. ..

When the middle point key is operated from the start point to the end point, the current position in the screen coordinates at the time when the middle point key is operated is converted into map coordinates for each operation of the middle point key. The intermediate point position is stored in the FD as road data.

Then, a line segment connecting the end point-corrected start point position and the intermediate point position, a line segment sequentially connecting the intermediate point positions, and a line segment connecting the last intermediate point position and the end point position are formed. The new road represented by is displayed on the map on the screen of the CRT 17.

Next, a series of control procedures in the handwriting mode will be described with reference to FIG.

Now, when the display control ECU 14 is set to the handwriting mode by operating the handwriting key of the operation key section 18, it is judged whether or not the character is input (step S).
1) If the determination result is YES, a predetermined character corresponding to the key operation is selected from the character data stored in the FD (step S2), and the selected character is written at any position on the map of the CRT 17. Whether the power should be set is set by moving the cursor, the writing position is input (step S3), and the selected character is displayed at the input writing position (step S4).

For example, when it is desired to leave the position of a good restaurant or coffee shop for meals or coffee on the map, the cursor is moved to a predetermined position by key operation, and the key operation is performed so that the selected character is displayed at that position. As a result, the content of the character indicating a restaurant or a coffee shop is displayed at a desired position.

On the other hand, if the decision result in the above-mentioned step S1 is NO, it is decided whether or not the line segment is inputted (step S5), and if the decision result is NO, it is decided whether or not the input is completed. (Step S6) If the determination result is NO, the process returns to step S1, and if YES, the process returns to start.

If the determination result in step S5 is YES, the starting point position in the screen coordinates of the CRT 17 is input and set by the input operation of the starting point of the road to be newly stored (step S7). The starting point position is converted into the starting point position in the map coordinates (step S
8), in the vicinity of the starting point position after coordinate conversion,
The stored data of the road already stored in the FD as map data is searched (step S9), and it is determined whether or not the stored data exists (step S10). If there is no stored data, the stored data is stored in the CRT 17. After an error message indicating that there is no message is displayed (step S1
1) Return to step S7, and if there is stored data, the process proceeds to the next step S12, the stored data is replaced with the start point position in the map coordinates, and the end point of the start point position in the map coordinates is corrected. The corrected start point position is converted back to screen coordinates again (step S12).

Further, when the middle point key is operated before reaching the end point, the middle point position in the screen coordinates of the CRT 17 is input and set by this key operation (step S13).
After the line segment connecting the starting point position of the screen coordinates and the intermediate point position of the screen coordinates in step S12 is displayed (step S14), the intermediate point position and the line segment of the screen coordinates are coordinate-converted into map coordinates and stored in the FD. Then, it is determined whether or not the end point key has been operated (step S15), and if the determination result is NO, the process returns to step S13, and the input of the intermediate point and the display of the line segment are repeated. Be done.

At this time, steps S16 to S
Returning to 13, the next intermediate point position is input and set,
A line segment connecting this midpoint position and the straight line midpoint position is displayed.

On the other hand, if the decision result in the above-mentioned step S16 is YES, it is decided that the end point key has been operated at the end point of the road, and the end point position in the inputted screen coordinates is converted into map coordinates (step S17). In the vicinity of the coordinate-converted end point position, the road storage data already stored in the FD as map data is searched (step S18), and it is determined whether or not there is storage data (step S19). , If there is no stored data, the process moves to step S11 and the error message is CRT.
17 is displayed (step S10), and if there is stored data, this stored data is replaced with the end point coordinates in the map coordinates, and the end point correction of the end point coordinates in the map coordinates is performed (step S20).

After that, the input data, that is, the end-point corrected end coordinates and the character and its display position are stored in the FD (step S21), and the process returns to the start, as in the case after the process of step S4.

At this time, the range searched for the end point correction is set to a certain range according to the width of the road displayed on the CRT 17, and as a result of the search, there are two or more corresponding stored data. The one closer to is selected.

Therefore, by performing such end point correction, the positions of the end points (start point and end point) of the road newly stored in the FD are displaced from the stored data already stored as road data as in the conventional case. Can be prevented and can be used as detected position correction data.

In the above embodiment, the case where the data of the intermediate point between the start point and the end point of the road is also input has been described, but when the line between the start point and the end point is linear, the intermediate point position is input. It is not necessary to perform the correction, and at least the end point correction may be performed so that the start point position and the end point position of the road to be newly stored and the stored data of the road already stored in the FD will not be displaced.

Further, the storage means is not limited to the above-mentioned FD, but may be any writable one.

[0032]

As described above, according to the map data adding method of the navigation system of the present invention, the starting point position and the ending point position on the screen coordinates are coordinate-converted into the map coordinates, and the starting point position and the ending point position after the conversion are converted. The presence or absence of storage data for roads in the vicinity is searched, and if there is storage data, the storage data is replaced with the start point position and end point position in map coordinates to perform end point correction. It is possible to prevent the position of the end point of the road to be deviated from the storage data already stored as road data, and the newly stored road data can be used as the detected position correction data, which is suitable for the navigation system. ..

[Brief description of drawings]

FIG. 1 is a flowchart for explaining the operation of an embodiment of a map data adding method for a navigation system of the present invention.

FIG. 2 is a block diagram of a navigation system applied to FIG.

FIG. 3 is an operation explanatory diagram of FIG. 2;

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

5 is an operation explanatory diagram of FIG. 4;

[Explanation of symbols]

 11 geomagnetic sensor 12 driven wheel speed sensor 13 position detection ECU 14 display control ECU 16 FDD device 17 CRT 18 operation key unit

Claims (1)

[Claims] 1. The present position of the vehicle is calculated by the position detection control means based on the outputs of the geomagnetic sensor and the vehicle speed sensor,
A navigation system for displaying necessary map data on the screen of the display device by reading out necessary data from the map data stored in advance in the writable storage device by the display control device, and displaying the calculated current position. In the map data adding method of the navigation system, which writes road data such as side roads and new roads, which are not included in the map data, to the storage means by operating the key of the operation key unit, it is at the start point and end point of the road to be written by the own vehicle. sometimes,
By the key operation of the operation key unit, the start point position and the end point position on the screen coordinates displayed on the screen of the display means are converted into the map coordinates of the map developed based on the map data, and after the coordinate conversion. In the vicinity of the start point position and the end point position of the above, it is searched whether or not there is stored road data already stored as the map data, and if there is stored storage data as a result of the search, the searched storage data is stored in the map coordinates. The starting point position and the ending point position in the map coordinates are replaced by the starting point position and the ending point position, respectively, and the starting point position and the ending point position after the ending point correction are stored in the storage means as the road data. How to add map data for navigation system.