JPH07107629B2 - In-vehicle map display device - Google Patents

Description

Detailed Description of the Invention [0001] The present invention relates to the relationship between the present location and the destination.
In-vehicle map display device that displays maps based on staff
It [0002] 2. Description of the Related Art A conventional device of this type is disclosed in Japanese Patent Laid-Open No.
169785, JP-A-58-10781, JP-A-5
There is a map display device such as 7-186111
Map display data corresponding to the display on the display means
Data, that is, so-called pattern (image) data
I am trying to display the map. [0003] [Problems to be Solved by the Invention]
In conventional map display devices, the above image data
Since the map is displayed using, the map prepared in advance
It is not possible to display a map other than
Attempt to display a map of the appropriate area that is related to the location
However, if it is not prepared in advance, it cannot be displayed and the map
There were considerable restrictions in terms of display freedom. The present invention has been made in view of the above problems.
Unique land with image data as shown in the prior art
Map display by common use of the same data instead of diagram display
The common first thing to try to increase the freedom to
Target Also, the scale according to the distance between the destination and the present location
Will display a map at an appropriate scale including the destination and the current location.
The second purpose is to obtain the information. In addition, now
Enlarge the map when the place is within a predetermined distance from the destination
The third purpose is to enable display. [0006] [Means for Solving the Problems] The above first object is achieved.
Common purpose, the second and third purposes above
In order to achieve the above, the present invention employs the following means. First, in order to achieve the second object,
In the invention described in claim 1, the route is formed.
Routes by displaying connecting lines between multiple constituent points
Display and map display by combining multiple routes
It is a vehicle-mounted map display device designed to perform
Display means for displaying and said means for forming said route
Specify each of the multiple constituent points as a point in the absolute coordinate system
Detects the current location of the vehicle and the storage means that stores the coordinates of the point
Current location detection means and destination setting procedure for setting the destination
The step, the current location detected by the current location detection means, and the eye
Depending on the distance to the destination set by the destination setting means
Scale determining means for determining the scale of the map to be displayed, and
The scale determined by the scale determination means, the current location detection means
Set by the destination setting means and the present location detected by
Based on the destination, the table including the current location and destination
In the absolute coordinate system corresponding to the map displayed on the display means
A specific area of and contained within at least that specific area
The storage means stores the position coordinates of the plurality of map constituent points.
And a display coordinate system defined for the display means.
From the relationship with the specific area, the extracted point coordinates
Coordinate conversion to the display coordinates of the display coordinate system, and this coordinate conversion
On the display coordinate system specified by the specified display coordinates
A connecting line between the display points of
View and form multiple routes,
A map for displaying a map of the specific area on the display means
And a display control means. Further, in order to achieve the third object,
In the invention described in claim 4, the route is
A connecting line is displayed between multiple constituent points to form
The map is displayed with multiple combinations of routes.
An on-vehicle map display device adapted to display
Display means for displaying and before forming the route
Each of the multiple constituent points is specified as a point in the absolute coordinate system
The storage means that stores the point coordinates to
Current location detection means to be output and detection by the current location detection means
The current location is within a predetermined distance to the predetermined destination
Determine the scale for enlarging the map to be displayed when
The scale determining means to be determined and this scale determining means
Based on the scale and the current location detected by the current location detection means.
Corresponding to the map to be enlarged and displayed on the display means,
Specify a specific area in the absolute coordinate system and
Point coordinates of a plurality of map constituent points included in a fixed area
From the storage means and set for the display means
From the relationship between the display coordinate system and the specific area,
Coordinate conversion of each point coordinate to the display coordinate of the display coordinate system
Then, the table specified by the display coordinates after this coordinate conversion.
Between the multiple display points on the coordinate system,
Displaying connecting lines on the display means to form multiple routes,
The display means for displaying the map of the specific area by a plurality of routes
And a map display control means for displaying on
are doing. [0009] In the invention described in claim 1,
Indicates that the current location of the vehicle is detected by the current location detection means, and
The destination is set by the destination setting means. Present of this vehicle
Map scale to be displayed according to the distance between the destination and the destination
Is determined by the scale determining means. The map display control means,
Based on this scale and the current location and destination, the current location and
Absolutely a specific area for displaying the map including the destination
Specify in the coordinate system and include at least within the specified area.
Extract the coordinates of multiple map constituent points from the storage means.
Then, the coordinates of each extracted point are displayed in the display coordinate system table.
Convert the coordinates to the indicated coordinates. In this coordinate converted display coordinates
Between display points on the display coordinate system defined by
Multiple routes are displayed by displaying connecting lines on the display means for each
However, a map of a specific area,
Display a map containing the current location and destination on the display means.
It According to the invention described in claim 4,
The current location of the vehicle detected by the current location detection means
Displayed when you are within a predetermined distance from the specified destination
The scale for enlarging and displaying the power map is determined by the scale determination means.
Will be decided. The map display control means is based on this determined reduction.
Based on the scale and the current location detected by the current location detection means, the table
In the absolute coordinate system, which corresponds to the map to be enlarged and displayed on the display means
A specific area of and contained within at least that specific area
Extract the point coordinates of multiple map constituent points from the storage means
Then, the coordinates of each extracted point are displayed. Display of the coordinate system
Convert coordinates to coordinates. With this coordinate-converted display coordinate
Route between multiple display points on the specified display coordinate system
Connecting lines are displayed for each display to form multiple routes,
A map of a specific area, that is, enlargement
The map to be displayed is displayed on the display means. [0011] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be given below with reference to the drawings.
explain. FIG. 1 is a block diagram showing the overall configuration of this embodiment.
Is. In the figure, 11 detects the traveling direction of the vehicle.
The azimuth detecting device, 12 is a distance sensor for detecting the traveling distance of the vehicle.
Sensor 13 is operated by a driver or the like, and at least the vehicle
A command device that can set the current location and destination of both
14 is CPU15, ROM16, RAM17, I / O times
An electronic control circuit including a road portion 18 and the like, 19 is an electronic control circuit
Display the map on Display 1 in response to the signal from 14.
It is a display controller. Here, the azimuth detecting device 11 is a link-shaped power supply.
-Malloy core, exciting coil and two coils orthogonal to each other
Equipped with a coil, the output voltage of these two coils
A direction sensor that detects the X and Y components of the geomagnetism according to the row direction
And the analog signal detected by the direction sensor
With an A / D converter that converts the
Outputs digital signals of X and Y components of geomagnetism according to
It is a thing. The distance sensor 12 is a speedometer cable.
Or rotation of the transmission output shaft
Indirectly through a reed switch, magnetic sensitive element, or optical
Pulse signal for each unit traveled distance of vehicle by electric conversion element
Is generated. The map data storage medium 2 is a ROM (Read
  Only Memory) package. map
Data of map data previously stored in the data storage medium 2
The structure is, for example, as shown in FIG.
Header 21 which is the identification signal of the
Point information column 22 about points and routes such as national roads
Route information column 23 and article information about various services
And columns 24. As shown in FIG. 3, the location information sequence 22 is Aichi
Belonging to the area, such as the Aichi Prefecture Point Information Sequence 25 for prefectures
It has a prefecture point information sequence group such as
For example, the Aichi prefecture location information column 25 is Nagoya city belonging to Aichi prefecture.
Belongs to the prefecture, such as Nagoya city spot information column 26
It has a city point information sequence group such as a city, and is an example of the city point information sequence group
For example, the Nagoya city location information column 26 is
From point information 27-1, 27-2, ...
Each of the spot information 27-1 and 27-2 has a spot information group
Point number, point level, point type, earth coordinates of the point
Of the X component and the Y component. This earth coordinate is specific
Point information in the absolute coordinate system with the point (eg Tokyo) as the origin
Means The absolute coordinate system is expressed in latitude and longitude.
Not only the earth coordinate system, but also the display coordinate system described later
Separately, it means a two-dimensionally represented coordinate system.Also, the point
Level information is based on the location that has the level information.
What determines the relative importance of whether or not to use it for a figure display
Then, in relation to the level information in Table 3 described later, that level
Extract the points that have the level information corresponding to the information
And used to form the route display. As shown in FIG. 4, the route information sequence 23 is #
1 route information sequence 28-1, # 2 route information sequence 28-2,
..., #N route information sequence 28-N and these route information sequences
One-to-one correspondence with 28-1, 28-2, ..., 28-N
Pointers 29-1, 29-2, ..., 29-N,
Each route information sequence 28-1, 28-2, ..., 28-N is
Route number, route level, route type, shape the route
Point number and the end of the routeInformationOr
Consists ofNote that the root level information is the root level.
Whether or not to use a route with route information for map display
It defines the relative importance, and the level information in Table 3 described later.
The root level information corresponding to the level information
To extract a route that has information and display the route
used. The article information sequence 24 is an intersection as shown in FIG.
Name information sequence 30-1, route name information sequence 30-2, ...
Mark name information sequence 30-M and these name information sequence 30-
Point corresponding to 1, 30-2, ..., 30-M on a one-to-one basis
, 34-M, and 34-M, and intersect
The point name information column 30-1 is the point number, name level, and intersection
Intersection consisting of name intersection information 31-1, 31-2, ...
It has a difference point information group, and the route name information column 30-2 is the route
Number, name level, route information 32-1 of route name,
It has a route information group consisting of 32-2, ...
The name information sequence 30-M includes the spot number, name level, and mark name.
A mark information group including mark information 33-1, 33-2, ...
Have. WhereThe above route is a map of roads, etc.
Means the lines that make up theThe above route types are National Road and High
Type of the route, such as expressway, general road, railway, coastline
The above-mentioned point types mean general intersections,
Highways over grades, interchanges, highways and highways
Intersection with highway, intersection with general road and railroad
It represents the type of point. The electronic control circuit 15 is a map data storage medium.
Map data from 2, direction information from direction detection device 11
No., pulse signal from the distance sensor 12, command device 13
In response to the command signals from the
A control signal is sent to the controller 19. The display controller 19 is an electronic control circuit 1.
Display on display 1 according to control signal from 4
Control and output video signal to display 1.
Force The display 1 is, for example, a cathode ray tube,
Display controller 1 consisting of liquid crystal or LED
As shown in the figure by the video signal from 9,
The road map, the current location P of the vehicle, and the destination Q are displayed.
It Next, the current location and destination of the vehicle are set.
An example of the operation procedure of the command device 13 for
To do. After turning on the ignition switch,
When you press the navigation key 41, a predetermined number of prefecture names are displayed on the display 1.
Is displayed. The occupant is the prefecture name menu on the display 1 screen.
Operate the cursor keys 42 or 43 while watching the vehicle
The prefecture to which the present location belongs, for example, the name of Aichi prefecture, is
To be displayed. Next, when the cursor key 44 is operated, Aichi prefecture
Names of multiple cities belonging to are displayed on the display 1 screen.
Shown. Crew members can see the names of the cities, etc.
-Operate 42 or 43 to select the city to which the current vehicle location belongs.
Name For example, the name of Kariya city is displayed in the above specified frame
To do so. Next, when the cursor key 44 is operated, Kariya city
Names of multiple towns belonging to are displayed on the display 1 screen.
Shown. Crew members can see the names of the towns, etc.
-Operate 42 or 43 to select the town to which the current vehicle location belongs.
Name For example, the name of Showa-cho is displayed in the above specified frame
To do so. Then, when you operate the set key 46, Showa Town
The entire map is displayed on the display 1 screen. In order to operate the command device 13 in this way
Therefore, the current location of the vehicle belongs to the display 1 screen.
A map is displayed. Then, operate the current position key 47,
After that, while looking at the displayed map, use the cursor keys 42 or
Operate any one of 45 to display the current position mark P on the map
set. As described above, the destination is recognized as the current location of the vehicle.
Similar to the setting of, first display the map to which the destination belongs.
B Display on one screen, then operate the destination key 48 to
After that, operate any of the cursor keys 42 to 45,
Set the destination mark Q on the displayed map. The current location or destination of the vehicle is set.
As mentioned above, the map used for storing is not limited to town-based maps.
Well, it may be a map of the city or prefecture. That is, the driver is a car
It can be a map where you want to set the current location or destination of both. Well
What is the operation of the cursor key 44?
Conversely, from the name of a town to the name of a city, from the name of a city to the
The name of the spot displayed on the display
You can switch to units. Next, a flow chart showing the control program shown in FIG.
The processing of this embodiment will be described along the row chart. Figure
In the control program shown in, the ignition switch is turned on.
The vehicle is operated by operating the command device 13 as described above.
After the current location and the destination are set, the processing is started and fixed.
Rouch that is processed every cycle (for example, every 100 msec)
Represents 100. When the processing of this routine 100 is started,
At step 101, the direction signal from the direction detection device 11
Is read, and in the following step 102, the geomagnetic direction of the vehicle
The direction with respect to the direction is calculated. Next, in step 103, the distance
The distance signal from sensor 12 is detected and the following step 104
Is the direction of the vehicle obtained in step 102 and
Based on the distance signal detected in step 103,
The current location is calculated. That is, before the processing of this routine is started
Distance and direction from the set vehicle current position (starting point)
By determining the position, the current position of the vehicle can be determined
Is. In the following step 105, the main routine is
Destinations that have already been set before the
And the current location of the vehicle obtained in step 104
The separation distance of is calculated. Thereafter, the process proceeds to step 106, where
Depending on the separation distance obtained in step 105,
The scale b of the map displayed on the spray 1 is calculated. Continued
At step 107, it is obtained at step 106.
The scale b of the map is actually displayed on the display 1.
It is judged whether it is equal to the scale b of the map that is
If it is determined that there is not, the process of the following step 108
The map of reduced scale b is displayed on the display 1 and this
Then, the processing of step 100 is completed. On the other hand, in step 107, it is actually displayed.
The scale a of the existing map and the value obtained in step 106
If it is determined that the map scales b are equal,
After the processing of the main routine 100 is completed, the display 1
The map of the scale a currently displayed is continuously displayed. Next, in step 106 of this routine 100,
Depending on the distance between the current location of the vehicle and the destination
The process of obtaining the reduced scale will be described in detail with reference to FIG.
It The flowchart shown in FIG. 8 is step 10 in FIG.
A control program that represents the detailed processing performed in 6.
Yes, first in step 111, go to step 105 in FIG.
The separation distance L obtained from the previous time is (100 msec. Before)
Whether the distance is less than or equal to the obtained separation distance L (-1), immediately
Then, determine whether the vehicle is moving toward the destination.
Is determined. At this point the vehicle is moving towards the destination
Continuing with the explanation that it is done, in step 111
The separation distance L is less than or equal to the separation distance L (-1) obtained last time.
It is determined that there is, and the separation distance L is
It is determined whether it is 5 km or more. In step 112, the separation distance L is 5 km or more.
If it is determined to be above, move to step 113
However, it is determined whether the separation distance L is 20 km or more.
It On the other hand, if the separation distance L is less than 5 km in step 112,
If it is determined that there is a map in step 114
The scale b is set to 1 / 25,000, and the steps shown in FIG.
The processing moves to 107. In step 113, the separation distance L is set to 20.
If it is determined that the value is equal to or more than Km, the step (not shown)
It is determined whether the separation distance L is 50 km or more.
In step 113, the separation distance L is less than 20 km.
If it is determined that the map scale is reduced in step 115.
b is set to 1 / 50,000, and in step 107 shown in FIG.
Move to processing. Thus, in step 106 of FIG. 7,
If the vehicle is moving towards its destination, see Table 1.
As shown, for example, the separation distance L is 0 km or more and less than 5 km.
In this case, the scale b is 1 / 25,000 and the separation distance L is 5 km.
If the above is less than 20 km, the scale b is reduced to 1 / 50,000.
That is, the scale b corresponding to the separation distance L is required.
Become. [0040] [Table 1] Next, when the vehicle moves away from the destination
In step 111, the separation distance L is calculated last time.
It is determined that the distance is larger than the calculated separation distance L (-1),
Whether the separation distance L is 6 km or more at step 116
Is determined. In step 116, the separation distance L is 6 km or less.
If it is determined that the map is full, in step 114 the map
The scale b of is reduced to 1 / 25,000 and released in step 116.
If it is determined that the distance L is 6 km or more, the
Whether or not the separation distance L is 24 km or more in step 117
Is determined. In step 117, the separation distance L is 24 km.
If it is determined to be less than
The scale b in the figure is set to 1 / 50,000, and in step 117
When it is determined that the separation distance L is 24 km or more,
The separation distance L is 60 km or more in a step not shown.
Is determined. Thus, in step 106 of FIG. 7,
When the vehicle moves away from the destination, as shown in Table 2,
For example, when the separation distance L is 0 km or more and less than 6 km,
Reduced scale b to 1 / 25,000 and separation distance L is 6 km or more, 2
If it is less than 4 km, the scale b is reduced to 1 / 50,000.
The scale b corresponding to the separation distance L is obtained. [0045] [Table 2] As described above, the vehicle moves toward the destination.
When moving, it is shown in Table 1 for the scale b of the map.
Such a range of the separation distance L is preset, while
If the two move away from the destination, use the map scale b.
The range of the separation distance L as shown in Table 2 is set in advance.
It This is when the vehicle is moving towards its destination
Is the lower limit value of the setting range of the separation distance L as shown in Table 1 (below
The map is enlarged when it is less than the (below, enlargement setting value)
However, when the vehicle moves away from the destination, the separation distance L is shown in Table 2.
The upper limit value of the setting range as shown in
U) It means to reduce the map when the above
It Here, it is clear from a comparison between Tables 1 and 2 above.
As you can see, the enlargement setting value and the reduction setting value are set to different values.
It is supposed that the enlargement setting value and the reduction setting value are the same value.
, The separation distance L is a value near the set value.
When the vehicle travels on the road that becomes
It approaches the destination or becomes the set value or more until it becomes less than
The map expands every time you move away from your destination
・ It will be reduced in size, and it will be very
This is because the lei map will be displayed. Also, Table 3
As shown in, the map data storage medium corresponding to the map scale b.
Level information in the map data of body 2 is also predetermined
If, for example, the scale b is 1 / 1,000,000,
The information is "0", and if the scale b is 1 / 500,000, the level information is
The reports are "0" and "1". This is the display
How detailed is the map displayed on Ray 1
Since it is set in advance, the scale is 1/1 million.
When displaying the map of "0" level point and route
To display only the map and a map with a scale of 1 / 500,000
In that case, display the point and route of "0" level.
The point and route of "1" level are also displayed in
And. [0048] [Table 3] As described above, the level information corresponding to the scale of the map is
The map displayed on the display 1 based on the report is
The map is as shown in FIG. Figure 9 is 1 / 1,000,000
Represents a display image showing a map of reduced scale.
However, the route from the point a1 to the point a3 at the "0" level
It is displayed. Point Q is the destination and point P1 is the vehicle
Represents the current location of. The vehicle is the destination from point P1 to point P2
The distance between the point P2 and the destination Q
If the separation L is less than 500 Km, 200 K as described above.
When m ≦ L <500Km, the map scale is 1/50
Because the level information is "0" and "1",
The image of ray 1 is switched to the image shown in Fig. 10.
It The image in FIG. 10 shows the point P2 and the destination in FIG.
The part indicated by A centering on the midpoint R1 with Q has been enlarged.
It is a thing. In addition, the point a1 represents the point of "0" level.
On the other hand, the points b1 and b2 are the "1" level points.
The roads displayed and displayed are naturally at level "0".
And "1" level route information. Next, the vehicle moves from the point P2 to the point P3.
When the separation distance L becomes less than 200 km,
Similarly, if 500 Km ≤ L <200 Km, the map will be reduced.
Scale is 1 / 200,000, and level information is "0", "1", "2"
Therefore, the image on the display 1 is as shown in FIG.
You can switch to a different image. Also in this case, the same point as above
In B of FIG. 10 centering on the midpoint R2 between P3 and the destination Q
The part shown is enlarged. In this way, as the vehicle approaches the destination,
The map displayed on display 1 is enlarged in detail.
Become so. Next, at step 108 of FIG.
The process of displaying the map of the scale b, that is, the reduction according to the separation distance.
The process of displaying the scale map on the display 1 is not shown in FIG.
14 is a flowchart showing the control program shown in FIG.
It will be described in detail along with. Flowcharts shown in FIGS. 12 to 14
Is a control detailing the process of step 108 in FIG.
It is a program (routine 200) that responds to the separation distance L.
The scale b of the same map and the one currently displayed on the display
The processing is started when the scale a of the map is different.
is there. When the processing of this routine 200 is started,
Route information of the map data storage medium 2 in step 201
The content of the head pointer 29-1 in the column 23 is read
Then, in subsequent step 202, all pointers 29-1 to 29-1
It is determined whether the contents of 29-N have been read. At this point, of the top pointer 29-1
Since it is just after the content is read, it is judged as "NO",
Control goes to step 203. In step 203
Is the #i pointer (the head pointer 29-
1) indicates the #i route information string (at this point,
Root level information of the gateway information column 28-1) is read.
In step 204, the root level information is reduced.
It is determined whether or not the level is set for the scale b.
It That is, the root level information corresponds to the scale b as shown in Table 3.
It is determined whether or not the setting level information is to be set. In step 204, root level information is set.
If it is determined that the information is not constant level information, the #i route (#
It is not necessary to display a map for 1 route), so step 20
5, the pointer is updated, that is, the next pointer (# 2
The content of the pointer 29-2) is read, and step 20
Return to processing of 2. On the other hand, the root level information is the set level information.
If it is determined that the #i route (# 1 route) is
The route should be displayed on the map.
Route of i route information sequence (# 1 route information sequence 28-1)
Type information is read. Next, at step 207, the #i loop
Point number information in the route information sequence (# 1 route information sequence 28-1)
(At this point, the top point number information) is read and
In step 208, the #i route information sequence (# 1 route information
Whether or not the route end information in report column 28-1) has been read
Is determined. At this point, the top spot number information is read
Immediately after being caught, the judgment result is "NO",
The process moves to step 209 in FIG. To step 209
The location number read in step 207 (start
The point level information given to the point number) is read
As with the route level information, this point level information is
It is determined whether or not the level is set for the scale b.
It Point level information is set in step 209.
If it is determined that it is not level information, this point is a map chart
Since it is not necessary to indicate it, the process returns to step 207 and
In the i route information sequence (# 1 route information sequence 28-1)
The next point number is read. On the other hand, the point level information is the set level information.
If determined to be present, this point is the point to be displayed on the map
Then, the process proceeds to the following step 210, and this point is #i.
The highest in the route information sequence (# 1 route information sequence 28-1)
It is determined whether or not it is the first extracted spot number. At this point, it is the first point number
Therefore, it is determined to be “YES” in step 210,
In the following step 211, the earth coordinate X component of this point is read.
The Y component of the earth coordinates is also included in step 212.
Is read. At the next step 213, the step
211, at this point, read in step 212
The earth coordinate point (X, Y) is the display coordinate point of display 1.
Is converted to (X1, Y1), and in the following step 214,
The area A to which the display coordinate point (X1, Y1) belongs is determined.
It In step 213, first, referring to FIG.
Origin in the display coordinate system of display 1 shown in 5
The earth coordinate system shown in FIG. 16 corresponding to (0, 0) on a one-to-one basis.
Find the earth coordinate point represented by (MPOS, BPOS)
Next, based on the earth coordinate points (MPOS, BPOS)
Earth coordinate points (LPOS, APO)
A process for converting S) into a point (X1, Y1) in the display coordinate system.
Is being processed, and earth coordinate points (MPOS, BPOS)
Is calculated as follows. First, the screen shown in FIG. 17 is displayed.
The center of the map is the earth coordinate point (MA
PCENX, MAPCENY). This is before
As mentioned above, the earth coordinate point of the midpoint between the vehicle present position and the destination is
As shown in FIG. 18, the vehicle present position P
The earth coordinate point is (NPOS, CPOS), and the destination Q
If the earth coordinate point is (OPOS, DPOS), the midpoint R
Earth coordinate points (MAPCENX, MAPCENY) are
Calculated by the formula. [0067] MAPCENX = (NPOS + OPS) / 2 MAPCENY = (CPOS + DPOS) / 2 Next, with this coordinate information MAPCENX, MAPCENY,
Number of dots on the map display screen of display 1 shown in FIG.
Dots per unit longitude determined according to x, y and scale b
Number LDOT, number of dots per unit latitude ADOT
Expression to be a meter MPOS = MAPCENX-y / LDOT BPOS = MAPCENY + x / ADOT The earth coordinate point (MPOS, BPOS) is calculated by
The display coordinate point (X1, Y1) is the following formula X1 = (LPOS-MPOS) × LDOT Y1 = (BPOS-APOS) × ADOT Required by. On the other hand, the display coordinates belonging to step 214 belong to
The area A to be converted is the coordinate conversion in step 213 as described above.
The display coordinate points (X1, Y1) obtained by the processing are shown in FIG.
Of areas 0 to VIII divided as shown in FIG.
It is performed by determining whether or not it belongs to the shift area.
It should be noted that the hatched area IV in FIG.
Corresponds to the shaded area of the
It represents the area of the map shown. At step 114 as described above, the display coordinate point is displayed.
When the area A to which (X1, Y1) belongs is obtained, the next step
Returning to step 207, #i route information sequence (# 1 route information sequence 2
The point number next to 8-1) is read and step 208
It is judged whether or not the route has ended, and it is not the end of the route.
If it is determined that this point number is set in step 209.
It is determined whether the level is constant. This in step 209
If the point number level is not the set level,
Return to page 207, and if it is determined that the level is the set level,
If this is the case, this step number is #i
First in the route information sequence (# 1 route information sequence 28-1)
It is determined whether or not it is the point number extracted in. At this point, the first point number is already
Since it has been extracted, the determination result is “N
“O”, and the following steps 215 to 218
The processes of are sequentially executed. Here, steps 215 to 21.
The process of 8 is the same as that of steps 211 to 214.
The same processing as the processing is performed, and this point number (#j point number
No.) earth coordinate point (X, Y) is displayed coordinate point (X2, Y)
2) and the display coordinate points (X2, Y2) belong to
Area B to be obtained is obtained. Next, in step 219, the already calculated
Display coordinate points (X1, Y1) that have been set
Whether or not display should be linked to the display coordinate points (X2, Y2)
That is, the area A to which the display coordinate point (X1, Y1) belongs,
The area B to which the display coordinate points (X2, Y2) belong has a specific relationship.
It is determined whether or not the person is in charge. Here, this judgment processing is performed by referring to FIGS.
As shown in, for example, the display coordinate point (X1, Y1) is the 0th area.
Belongs to the area, and the other display coordinate points (X2, Y2) are the 0th,
If it belongs to any of I, II, III and VI regions
Have no specific relationship with each other (marked with X in FIG. 20)
It is determined that the display coordinate point (X1, Y1) is the 0th area.
And other display coordinate points (X2, Y2) belong to IV,
If it belongs to either V, VI or VII region
Have a specific relationship (marked with a circle in Fig. 20)
Is judged. For other combinations, see Fig. 20.
As shown. Next, in step 219, the area A and the area are
When it is determined that Zone B does not have a specific relationship
Moves to step 220 and sets area A as area B.
The processing for updating the area is performed, and in the subsequent step 221
Display coordinate point (X2, Y2) Display coordinate point (X1, Y1)
Processing for updating the coordinates to be performed is performed, and step 207
Return to. On the other hand, in step 219, the areas A and
Step if B is determined to have a particular relationship
Move to 222, display coordinate point (X1, Y1) and other table
Connect the connecting line with the indicated coordinate points (X2, Y2) according to the route type
Processing for displaying on the display screen is performed. That is, for example, #
If the i route (# 1 route) is a national road,
The route is displayed with higher brightness than that of the projector.
Then, in the subsequent steps 220 and 221, the area
The update process and the coordinate update process are performed, and step 207 is performed.
Transition. After that, the route of the #i route (# 1 route)
Until the end is read, steps 207, 208, 2
09, or steps 207, 208, 2
09 and steps 210, 215 to 222 (in some cases
Therefore, 222 is excluded. ) And any of the routes consisting of
Select and execute the route for #i route (# 1 route)
The display will start. The route of #i route (# 1 route)
When the end is read, the determination result of step 208 is
Since it is inverted to “YES”, step 205 is actually executed next.
The pointer is updated, and the next route (#
The processing for route 2) is the same as the processing for route # 1 above.
Is done. Thereafter, the same as above for each route information string
The processing is sequentially executed, and the #N route information sequence 28-N is
When all the processing is completed, all points are
It is determined that the contents of the
00, that is, the processing of step 108 in FIG. 7 is completed.
The Rukoto. As described above, FIG. 7, FIG. 8 and FIG.
The control program shown in FIGS.
Operates the command device, and the current location and purpose of the starting vehicle
The process is started by setting the ground, and the direction detection device
11 Based on the signals from 11 and the distance sensor 12,
The vehicle's current location, which changes accordingly, is calculated and the vehicle's current location is calculated.
Preset based on the distance between the location and the destination
The scale b of the map is calculated, and the scale b and the actual display
When the scale a of the map displayed on Ray 1 is different
Changes the map displayed on the display 1 to the map of scale b.
The process of changing will be performed. Also a map of this scale b
Is displayed according to the route information sequence of the map data storage medium 2.
It is a route that has a set level corresponding to the scale b.
And extract points with a set level from that route
Then, the coordinate conversion for that point is performed and the two adjacent
Depending on the route type, if the points have a specific relationship
It is carried out by displaying the connection between the two points with the brightness
It As described above, in the present embodiment, the current state of the vehicle is
The map can be enlarged or reduced depending on the distance between the location and the destination.
Since it is done dynamically, the relationship between the vehicle's current location and its destination is
Vehicles that are easy to understand and easy for drivers to use
It will be a guide. In the above embodiment, the map data storage medium 2
Is a ROM package, but CD-RO
M, floppy disk, magnetic tape or punch
You may use a card. In this case, map data
A reading device for reading It is also possible to specify the current location and destination of the vehicle.
The command method is to specify the spot name or spot number.
It may be a method of determining. Further in the above embodiment
Displays the midpoint of the vehicle's current location and destination on the display
The map displayed is changed as the center of the displayed map.
However, the center of the map connects the vehicle's current location and destination.
It can be anywhere on the line, centered on the vehicle's current location
Good. In that case, the current location of the vehicle and the destination are far away.
If you are displaying a relatively wide area map,
Display a map that does not include the target location and approach the destination, for example, 1
Display a map including the destination when the scale is reduced to 50,000
You may do it. Next, with the current location of the vehicle as the center of the cover map,
The map does not include the destination until the vehicle approaches the destination.
21 and 2 show the map displayed on the display when
2 is used for the explanation. FIG. 21 shows the scale for the separation distance L.
Is 1 / 200,000 and represents a map that does not include the destination.
It In the figure, P'1 represents the current position of the vehicle, and Q is the eye.
It represents the target location, but the destination Q is not included in the displayed map.
Not displayed at the end of the screen of the display
You will know the direction of. And the vehicle heads for the destination
I moved to P'2 and a map with a scale of 1 / 50,000 was displayed.
Then, the map will be as shown in FIG. 22, including the destination Q.
A map will be displayed. Also in this case, the above-mentioned embodiment
The same effect as can be obtained. In the above embodiment, the scope of claims is
In comparison with the configuration shown in the box,
A1 corresponds to the display means for displaying the map, and the map data entry
The storage medium 2 corresponds to the storage means. In addition, the direction detection device 1
1, the distance sensor 12, and the calculation process of step 104 of FIG.
The reason corresponds to the present location detection means, and the purpose by the command device 13 is
The place setting corresponds to the destination setting means. In addition, the
Up and down 105 and 106 correspond to the scale determining means, and are shown in FIG.
The calculation procedure shown in FIG. 13 corresponds to the map display control means.
It [0085] INDUSTRIAL APPLICABILITY In the present invention, the structure of a map is constructed.
The origin is defined as a point in the absolute coordinate system and the absolute coordinate
A specific area in the standard system is specified and the structure included in that area is specified.
Convert to display coordinates based on the finish point and display the desired map
The points of the constituent points that make up the map
Coordinates can be commonly used for desired map displays
It has the excellent effect of Furthermore, the invention described in claim 1
In Ming, at a scale according to the distance between the destination and the current location
Display the map at an appropriate scale including the destination and the current location.
It has the excellent effect of being able to Further, according to the fourth aspect of the invention,
In Ming, your current location is within a certain distance from your destination.
It is excellent that you can enlarge the map when you get it
There is an effect.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing the overall configuration of an embodiment of the present invention. FIG. 2 is a configuration diagram showing a data configuration stored in a map data storage medium 2. 3 is a configuration diagram showing a data configuration of a spot information string 22 in FIG. 4 is a configuration diagram showing a data configuration of a route information sequence 23 in FIG. 5 is a configuration diagram showing a data configuration of an article information sequence 24 in FIG. 6 is an arrangement diagram of main keys of the command device 13. FIG. FIG. 7 is a flowchart showing an entire control program in the electronic control circuit. 8 is a flowchart showing a detailed calculation process of step 106 in FIG. FIG. 9 is a display pattern diagram displayed on the display. FIG. 10 is a display pattern diagram displayed on the display. FIG. 11 is a display pattern diagram displayed on the display. 12 is a flowchart showing the arithmetic processing of step 108 in FIG. 13 is a flowchart showing a calculation process of step 108 in FIG. 14 is a flowchart showing a calculation process of step 108 in FIG. FIG. 15 is an explanatory diagram illustrating a display coordinate system. FIG. 16 is an explanatory diagram illustrating an earth coordinate system. FIG. 17 is an explanatory diagram illustrating the relationship between the display coordinate system and the earth coordinate system. FIG. 18 is an explanatory diagram illustrating a midpoint of a region to be displayed. FIG. 19 is an explanatory diagram illustrating a region to which display coordinates belong. FIG. 20 is a relationship diagram for determining whether or not a connecting line corresponds to what should be displayed. FIG. 21 is a display pattern diagram displayed on a display according to another embodiment. FIG. 22 is a display pattern diagram displayed on a display according to another embodiment. [Explanation of Codes] 1 Display 2 Map Data Storage Medium 11 Direction Detection Device 12 Distance Sensor 13 Command Device 14 Electronic Control Circuit

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Claims (1)

(1) A vehicle-mounted map display device adapted to display a route by displaying a connecting line between a plurality of constituent points for forming a route and displaying a map by a plurality of combinations of the routes. A display means for displaying a map, a storage means for storing point coordinates defining each of the plurality of constituent points for forming the route as points in an absolute coordinate system, and a current position of the vehicle detected A current location detecting means, a destination setting means for setting a destination, and a map to be displayed according to the distance between the current location detected by the current location detecting means and the destination set by the destination setting means. Based on the scale determining means for determining the scale of, the scale determined by the scale determining means, the current location detected by the current location detecting means, and the destination set by the destination setting means, the current location And a destination, which corresponds to the map displayed on the display means, is specified in the absolute coordinate system, and at least the point coordinates of the plurality of map constituent points included in the specified area are stored in the memory. The coordinate of each extracted point is converted into the display coordinate of the display coordinate system based on the relationship between the display coordinate system defined for the display unit and the specific area, and the coordinate-converted display is displayed. Between the plurality of display points on the display coordinate system defined by the coordinates, connecting lines are displayed on the display means for each route to form a plurality of routes, and a map of the specific area is formed by the plurality of routes. An on-vehicle map display device comprising a map display control unit for displaying on the display unit. (2) The storage means, for each of the constituent points,
It has a point level that determines the relative importance of whether or not to use the constituent points for map display, the map display control means is related to the scale determined by the scale determination means, and with respect to that scale. The point coordinates of a constituent point having an importance to be displayed are extracted from the storage means, and the map of the specific area is displayed based on the extracted point coordinates. In-vehicle map display device. (3) The in-vehicle map display according to claim 1 or 2, wherein the map display control means sets the midpoint of the current location and the destination at the center of the specific area. apparatus. (4) An on-vehicle map display device configured to display a route by displaying connecting lines between a plurality of constituent points for forming a route and to display a map by a plurality of combinations of the routes. Display means for displaying, each of the plurality of constituent points for forming the route, storage means for storing point coordinates that define the points of the absolute coordinate system, current location detection means for detecting the current location of the vehicle, When the current position detected by the current position detecting unit is within a predetermined distance from a predetermined destination, a scale determining unit for determining a scale for enlarging and displaying the map to be displayed, and the scale determining unit. Based on the determined scale and the current location detected by the current location detection means, a specific area in the absolute coordinate system, which corresponds to the map to be enlarged and displayed on the display means, is specified, and at least that The point coordinates of the plurality of map constituent points included in the fixed area are extracted from the storage means, and the extracted point coordinates are extracted from the relationship between the display coordinate system defined for the display means and the specific area. Coordinates are converted to the display coordinates of the display coordinate system, and a plurality of display points on the display coordinate system defined by the coordinate-converted display coordinates are displayed on the display means by connecting lines for each route. A vehicle-mounted map display device comprising: a plurality of routes, and a map display control means for displaying a map of the specific area on the display means by the plurality of routes. (5) The storage means stores, for each of the constituent points,
It has a point level that determines the relative importance of whether or not to use the constituent points for map display, the map display control means is related to the scale determined by the scale determination means, and with respect to that scale. The point coordinates of constituent points having importance to be displayed are extracted from the storage means, and the map of the specific area is displayed based on the extracted point coordinates. In-vehicle map display device. (6) The vehicle-mounted map display according to claim 4 or 5, wherein the map display control means sets the midpoint of the current location and the destination at the center of the specific area. apparatus.