JPH09197961A - On-vehicle navigation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily recognize the scale of a display map area by displaying a detailed map of the peripheral area of a vehicle position, displaying a wide- area map of an area distant from the vehicle position by scale conversion or nonconversion, and displaying the scale of map data that a scale gauge mark belongs to when the mark is displayed. SOLUTION: A map image drawing part 12 draws map data of detailed scale level in an image area that the vehicle belongs to by using map data by scales stored on a CD-ROM 1. Further, map data of smaller scale level are drawn in an adjacent area by scale conversion at need and a vehicle position mark and the scale gauge mark are drawn. Further, the map image drawing part 12, when drawing the scale gauge mark across the respective image areas, draws the scale of the map data corresponding to the image area that the scale gauge mark belongs to together with the scale gauge mark and displays it on a screen.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle-mounted navigation device for displaying a plurality of scale maps together with scale gauges and characters on one screen.

[0002]

2. Description of the Related Art A vehicle-mounted navigation device includes a map data storage device such as a CD-ROM that stores map data, a display device, a vehicle position detection device such as a GPS receiver for detecting the current position and the current direction of the vehicle. Having map data including the current position of the vehicle from a CD-ROM or the like, drawing a map image centered on the vehicle position based on the map data, and displaying the map image on the display screen,
Fix the vehicle position mark in the center of the display screen and scroll the map image according to the movement of the vehicle, or fix the map image on the screen and move the vehicle position mark to see where the vehicle is currently traveling. You can tell at a glance what you are doing. The maps stored in the CD-ROM are 1/12500, 1/25000, 1/10000.
It is divided into a longitude width and a latitude width of an appropriate size according to a scale level such as 0 or 1/200000, and a road or the like is represented by a coordinate set of vertices (nodes) expressed in longitude and latitude. The map data includes (1) map matching including a road list, a node table, an intersection node list, and an intersection net list, a road layer for route search,
(2) A background layer for displaying roads, buildings, parks, rivers, etc. on the map screen, (3) Administrative division names such as municipalities, road names, characters such as building names, map symbols, etc. It has been proposed that the map data is composed of a character / symbol layer and the like, and when the map is displayed on the display screen, it is displayed using the map data of the scale level designated by the driver.

[0003]

However, in such a conventional vehicle-mounted navigation device, since one designated scale map data is displayed on one screen, for example, when driving. When displaying the map around the vehicle position using detailed scale map data, the map around the vehicle position is displayed in detail, but the map in the area away from the vehicle position is not displayed and there is a problem that it cannot be overlooked in a wide area. there were. On the other hand, when a map is displayed using a wide area scale map data, a distant area is displayed and can be overlooked, but a map around the vehicle position is also displayed as a wide area map, which is not clear in detail. The present invention was devised in view of such a point, and displays the area around the vehicle position on the screen in a detailed map, and the area away from the vehicle position is scaled or displayed in a wide area map without scale conversion. Another object of the present invention is to provide a vehicle-mounted navigation device that, when displaying a scale gauge mark, displays the scale of the map data to which the mark belongs so that the scale of the display map area can be easily recognized. Also, when displaying various marks or characters, if the marks or characters are in the scale-converted map area, the map data is scale-converted by changing the shape of the marks or characters in the area. An object of the present invention is to provide a vehicle-mounted navigation device that makes it easy to recognize this. Furthermore, when the same scroll key is continuously operated, the map area of the scale level to which the vehicle position displayed on the screen belongs is narrowed, and the narrowed area is rewritten with the map data of the adjacent small scale, An object is to provide a vehicle-mounted navigation device that improves scroll speed.

[0004]

According to the present invention, there is provided a map data storage means for storing map data according to a scale, a vehicle position detection means for detecting a vehicle position and a vehicle direction, and a predetermined area to which a vehicle belongs. A map data of a desired scale level is drawn, and map data of a scale level smaller than the scale level is drawn in a predetermined area adjacent to the area with or without scale conversion, and a vehicle position mark and a scale gauge. In a vehicle-mounted navigation device equipped with a map image drawing means for drawing a mark and displaying it on the display means, when the map image drawing means draws a reduced scale gauge mark across each region, the gauge mark belongs to the map image drawing means. This is achieved by drawing a scale of the map data of the area. Further, in the present invention, map data storage means for storing map data by scale, vehicle position detection means for detecting vehicle position and vehicle orientation, and drawing map data at a desired scale level in a predetermined area to which the vehicle belongs, And, in a predetermined area adjacent to the area, map data of a scale level smaller than the scale level is drawn with or without scale conversion, and a vehicle position mark, scale gauge mark, user set point mark, trajectory mark, In a vehicle-mounted navigation device equipped with a map image drawing means for drawing a mark such as a cursor mark and / or a character with a frame and displaying it on the display means, the map image drawing means draws the character with the mark and / or the frame. When the map data to which the mark or / and the framed character belongs is scale-reduced, The shape in the click and / or regions which are not to scale converts the shape of the frame is achieved by having different. Furthermore, in the present invention, map data storage means for storing map data by scale, vehicle position detection means for detecting the vehicle position and vehicle direction, scroll keys for scrolling the map, and a predetermined area to which the vehicle belongs are desired. Drawing map data at a scale level, and drawing map data at a scale level smaller than the display scale level that is smaller than the display scale level in a predetermined area adjacent to the area with or without scale conversion and drawing a vehicle position mark. In a vehicle-mounted navigation device comprising a map image drawing means for displaying a screen on a display means, the map image drawing means narrows the area to which the vehicle displayed on the screen belongs when the same scroll key is continuously operated. It is achieved by going down.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 is an overall configuration diagram of a vehicle-mounted navigation device according to an embodiment of the present invention. In the figure, 1 is 1/12500, 1/25000, 1/10 from the largest scale.
0000, 1/200000, 1/800000, 1 /
1600000, 1/6400000, 1/25600
It is a CD-ROM that stores map data composed of road layers, background layers, character / symbol layers, etc. of eight different scales of 000, for example, scale map data of 1 / 25,000 or less exists in all areas. Yes, but 1/125
00 scale map data exists only in urban areas. 2 is a vehicle that has a GPS receiver that detects the vehicle position by satellite navigation using GPS satellites and a self-contained navigation sensor, and that detects the position and direction of the running vehicle and outputs vehicle position data and vehicle direction data. The position detection unit 3 is an operation unit, and includes menu call keys, enlargement / reduction keys, cursor operations, up / down / left / right keys for map scrolling, a recording start key and a recording end key for recording a traveling locus. Equipped with keys etc. Reference numeral 4 denotes a display device that displays a map image around the vehicle position on the screen together with the vehicle position mark and the traveling locus, and displays a menu image. The screen size is, for example, 9 cm in length × 12 cm in width. Reference numeral 10 denotes a navigation controller having a microcomputer configuration, which draws a map image including a vehicle position together with a vehicle position mark and a traveling locus using map data for each scale stored in the CD-ROM 1.
Display on the display device 4. 11 is a CD-ROM
1 is a buffer memory for temporarily storing the map data read from 1; 12 is a map image drawing unit, which inputs the vehicle position data and the vehicle azimuth data detected by the vehicle position detecting unit 2, and stores the vehicle position from the CD-ROM 1. The peripheral map data is read to the buffer memory 11, and the read map data is used to draw a map image centered on the vehicle position in the video RAM 13 described later without or with coordinate conversion, and the vehicle position mark is displayed. Also draw. In addition, the map image drawing unit 12 draws a menu image together with a cursor in the video RAM when the menu is called, or draws a running locus mark or scales with reference to the running locus memory 15 when the running locus display mode is set. Marks such as gauge marks, vehicle position marks, and spot marks set by the user are drawn on the video RAM 13. Furthermore, the map image drawing unit 12 follows the cursor movement by the scroll key operation,
Alternatively, as the vehicle position data and the vehicle azimuth data input from the running vehicle position detection unit 2 change, new map data is read from the CD-ROM 1 to the buffer memory 11 as necessary, and the map image in the video RAM is rewritten appropriately. . Reference numeral 13 denotes a video RAM having a storage area for one screen, which stores a map image, a menu image, a traveling locus image, and 14 is an image stored in the video RAM and is read as a predetermined video signal. An image conversion unit that converts and outputs to the display device 14. Reference numeral 15 is a running locus memory that stores running locus data.

2 to 5 are flowcharts showing the operation of the navigation controller 10 according to the embodiment of the present invention, and FIGS. 6 to 15 are explanatory views of screen display examples, which will be described below with reference to these figures. When the power is turned on, the vehicle position detection unit 2 periodically detects the vehicle position and the vehicle direction by the GPS receiver and the self-contained navigation sensor, and outputs the vehicle position data and the vehicle direction data. On the other hand, after the power is turned on, the navigation controller 10 sets the navigation mode (step 101 in FIG. 2), and sets the initial display coordinates of the scale gauge mark, which will be described later, at substantially the left end of the screen (step 102). Next, the radius R1 of the first image area to which the vehicle belongs
Is initially set to, for example, 3.4 cm (step 10
3), the map image drawing unit 12 uses the scale D specified by the user.
Is initialized to, for example, 1/12500 (step 104), and then the vehicle position data and the vehicle azimuth data most recently detected by the vehicle position detector 2 are input (step 10).
5), it is checked whether R1 is zero (step 106). Since R1 = 3.4 at this point, the determination result is No, and step 107 is executed next. In step 107, the actual distance r centered on the current vehicle position
It is checked whether or not a map of reduced scale D exists within the range of 1 (D) = R1 / D (m), and if it exists, the map data of reduced scale D (first area) is read into the buffer memory, and north is turned upward. The drawn map image (first image area) is drawn in the video RAM. At this point, R1 = 3.4 cm, so r1
(D) = 425 m, which means that map data with a radius of 425 m is drawn within a radius of 3.4 cm on the screen (step 108, see FIGS. 6A and 6B). When the map data of the reduced scale D is not a circle with a radius of 425 m but is partially missing, the corresponding first image area also has a shape in which a part of the circle is missing (step 108, FIG. 6).
(C) and (d)). Specifically, by using the data of the background layer in the map data, the background image of roads, buildings, rivers, etc., with the vehicle position as the center and the north facing upward is video RAM.
13 is drawn, and the characters such as administrative division names such as the names of cities, towns and villages, the names of roads, etc., and the map symbol data to be drawn at the corresponding positions on the background image using the data of the character / symbol layer are recorded in the video RAM 1.
Draw to 3. When the longitude and latitude coordinates of the current vehicle position on the map are (xc, yc) and the corresponding coordinates on the screen are (Xc, Yc), this calculation is sequentially calculated according to the following equation (Fig. 6 ( e) (f)). X-Xc = (3.4 cm / 425 m) (x-xc) (xc-425) ≦ x ≦ xc + 425 Y-Yc = (3.4 cm / 425 m) (y-yc) (yc-425 ≦ y ≦ yc + 425 )

Next, the map image drawing unit 12 reduces the scale by one step to reduce the scale D to 1/25000, and then
Actual distance r2 (D) from the current vehicle position excluding the map area
= Map data within the range of 950m (2nd map area)
To the buffer memory, and read the read map data from the vehicle position outside the first image area on the screen with a radius R2 =
Coordinate conversion is performed within a range of 3.8 cm so that the scale becomes smaller as the distance from the vehicle position increases, and a map image (second image region) with north facing upward is drawn in the video RAM 13. If the first image area is not circular and is partially missing, the missing portion is scaled D = 1/2500.
The map data of 0 is scaled and displayed (steps 109 and 110, see FIGS. 7A to 7D). This calculation is sequentially calculated according to the following equation (FIG. 7).
(See (e) and (f)). X-Xc + 3.8 = (0.4 cm / 525 m) (x-xc + 950) (xc-950 ≦ x <xc-425) X-Xc = (3.4 cm / 425 m) (x-xc) (xc-425 < x <xc + 425) X-Xc-3.8 = (0.4 cm / 525 m) (x-xc-950) (xc + 425 ≦ x ≦ xc + 950) Y-Yc + 3.8 = (0.4 cm / 525 m) (y-yc + 950) ) (Yc-950 <y <yc-425) Y-Yc = (3.4cm / 425m) (y-yc) (yc-425 <y <yc + 425) Y-Yc-3.8 = (0.4cm / 525m) (y-yc-950) (yc + 425 ≦ y ≦ yc + 950)

Next, the map image drawing unit 12 reduces the scale by one step to reduce the scale D to 1/100000, and then the actual distance r from the current vehicle position excluding the first and second map regions.
Map data within the range of 3 (D) = 8400 m (3rd
(Map area) is read to the buffer, and the read map data is read from the vehicle position outside the second image area on the screen with a radius R3.
= 4.2 cm, the coordinates are converted so that the scale is reduced as the distance from the vehicle is increased, and a map image (third image area) with north facing upward is drawn in the video RAM 13 (steps 111 and 112, FIG. 8 (a), (b)). This calculation is performed according to the following equation (FIG. 8).
(C) and (d)). X-Xc + 3.8 = (0.4 cm / 7450 m) (x-xc + 950) (xc-8400 ≦ x ≦ xc-950) X-Xc = (3.8 cm / 950 m) (x-xc) (xc-950 < x <xc + 950) X−Xc−3.8 = (0.4 cm / 7450 m) (x−xc−950) (xc + 950 ≦ x ≦ xc + 8400) Y−Yc + 3.8 = (0.4 cm / 7450 m) (y−yc + 950) ) (Yc-8400 ≦ y ≦ yc-950) Y-Yc = (3.8 cm / 950 m) (y-yc) (yc-950 <y <yc + 950) Y-Yc-3.8 = (0.4 cm / 7450m) (y-yc-950) (yc + 950 ≦ y ≦ yc + 8400)

Next, the map image drawing unit 12 reduces the scale by one step to reduce the scale D to 1/200000, and then vertically 18 with the current vehicle position as the center excluding the first to third regions.
000 (m) x 24000 (m) horizontal map data (4th
The map area) is read to the buffer memory 11, and the map image (the fourth image area) with the north facing upward is read by the video RAM 13.
Drawing (steps 113 and 114, FIG. 9A),
(B)). This calculation is calculated according to the following equation (see FIGS. 9C and 9D). X-Xc = (6.0 cm / 12000 m) (x-xc) (xc-12000 ≦ x ≦ xc + 12000) Y-Yc = (4.5 cm / 9000 m) (y-yc) (yc-9000 ≦ y ≦ yc + 9000) After that, a vehicle position mark with the vehicle direction facing the center of the map image is drawn (step 115).

As a result, a radius r1 centered on the vehicle position
= If there is even a portion of the map data of reduced scale D = 1/12500 within the range of 425 m, within the range of radius R1 = 3.4 cm centered on the vehicle position on the screen (first image area)
The map data of the scale D = 1/12500 is displayed on the screen, and the radius R2 of the vehicle position excluding the first image area is R2 = 3.
Within the range of 8 cm (second image area), the scale D = 1/25.
000 map data are coordinate-converted and displayed. First
And R3 = 4. Centered on the vehicle position excluding the second image area.
Within the range of 2 cm (the third image area), the scale D = 1/100
000 map data are coordinate-converted and displayed, and the scale D = 1/20 in the fourth image area outside the first to third image areas.
0000 map data are displayed (Fig. 10 (a),
(B)). Further, a radius r1 = centered on the vehicle position
When there is no map data of reduced scale D = 1/12500 within the range of 425 m, the first image area does not exist, and the radius R2 = 3.8 cm centered on the vehicle position on the screen (the second image In the area), the map data of reduced scale D = 1/25000 is coordinate-converted and displayed. Within the range of 4.2 cm centering on the vehicle position excluding the second image area (third image area), the map data of reduced scale D = 1/1000000 is coordinate-converted and displayed, and the second and third image areas are displayed. Outside scale D
= 1/200000 map data is displayed (Fig. 10
(C)). In the present embodiment, the map data for each scale stored in the CD-ROM is continuously applied to the first to fourth image areas in descending order of scale, but the scale may of course be discontinuous. Further, the boundary lines of the first to fourth image areas may not be displayed, and when displayed, it is desirable to use an inconspicuous color such as yellow.

Next, it is checked whether or not the running locus is displayed. If the result is YES, the running locus data stored in the running locus memory 15 is read and the locus mark is drawn by, for example, a triangle mark (step in FIG. 3). 116, 11
7, FIG. 11A). Subsequently, it is checked whether or not the user setting mark is displayed, and if YES, the point set and registered by the user in the past is drawn by the user setting mark, for example, the letter M with an outer frame (steps 118 and 119, FIG. 11).
(B)). Then, it is checked whether there is a message to be displayed, and if there is a message, the message is drawn with an outer frame (see steps 120 and 121, FIGS. 11C and 11D). Next, it is checked whether the scale gauge mark is displayed (step 122), and if YES, it is checked whether the scale gauge timer 1 has timed up (step 123). If the time is up, the coordinates of the current scale gauge mark coordinates on the screen are moved to the right by a certain distance d and set as new scale gauge mark coordinates, and the scale gauge timer 1 is set to 2 seconds and started. The scale of the map data corresponding to the map image to which the new scale gauge mark coordinates belong is drawn together with the scale gauge mark (steps 124, 125, 126). If the scale gauge timer 1 has not timed up in step 123, it is checked whether the scale gauge timer 1 is measuring time. If YES, the process proceeds to step 126, and if NO, the process proceeds to step 125. After step 126, the image drawn in the video RAM 13 is read by the video conversion unit 14, converted into a predetermined video signal, output to the display device 4, and displayed on the screen (step 128).

As a result, when the initial display coordinate of the scale gauge mark is set to, for example, the substantially left end of the screen, the scale at that point, for example, 8 km is displayed together with the scale gauge mark. The scale gauge mark moves to the right by a distance d every 2 seconds, and when the mark reaches the third image area, a scale of 4 km is displayed, and when the mark reaches the second image area, a scale of 1 km is displayed. When it reaches the image area, a scale of 500 m is displayed. When the scale gauge mark reaches the right end in this way, the left end is displayed again as the display start point and the same process is repeated (Fig. 1).
2). Here, the display start timing of the scale gauge mark may be set every fixed time, every time the vehicle travels a fixed distance, or every time the scale gauge display key is provided and the key is pressed. In addition, the map data of the second and third image areas have a different shape from the original map data as a result of scale conversion, and the scale gauge is displayed to let the user recognize that the displayed map is deformed. When the mark belongs to the second and third image areas, the scale gauge mark may be wavy (see FIG. 13), the display color of the scale gauge mark may be changed, or the size may be changed. Further, in the second and third image areas, the traveling locus mark may be changed to a staggered triangular mark, the outer frame of the user setting mark M may be corrugated, or the message outer frame may be corrugated (FIG. 14 ( See a) to (d)). Furthermore, it has a conventional display mode for displaying one scale map data on one screen and a display mode for combining and displaying a plurality of scale map data on one screen as in the present embodiment. In the display mode, the scale is displayed, but in the mode in which a plurality of scale map data are combined and displayed on one screen, the scale may not be displayed at all so as not to confuse the user.

After step 128, the navigation controller 10 checks whether or not the scroll key is pressed (step 129). If NO, step 10
The process from 2 onward is repeated, and if YES, the map scroll mode is set (step 201 in FIG. 4). The map image drawing unit 12 sets the current vehicle position as the initial value of the cursor coordinates (step 202), sets the scale D designated by the user to, for example, 1/12500 (step 203), and then sets the radius of the first image. It is checked whether R1 is zero (step 204). If YES, the scale D is set to 1/25000, which is one step smaller (step 205).
In the coordinate system with north facing upward, the coordinates that are apart from the cursor coordinates by a fixed distance L / D in the direction of the pressed key are obtained and set as new cursor coordinates (step 206). Next, it is checked whether R1 is zero (step 207), and if NO, the actual distance r1 (D) = R1 / D centered on the cursor coordinates.
Check if there is a map of scale D within the range of (m),
If YES, the map data (first map area) having a radius r1 with the cursor coordinates as the center is read into the buffer memory 11, and the map image with the north facing upward (first image area) is drawn in the video RAM 13 (step 208, 20
9, FIG. 6 (a)-(d)). Note that step 207
Or if R1 is zero, or in step 208, the actual distance r1 (D) = R1 / D centered on the cursor coordinates.
If there is no map data of reduced scale D = 1/12500 within the range of (m), the first map area does not exist.

Next, the map image drawing unit 12 reduces the scale by one step to reduce the scale D to 1/25000, and then excludes the first map area, and the actual distance r2 around the cursor coordinates.
(D) = Map data within the range of 950 m (second map area) is read to the buffer memory 11, and the read map data is located outside the first image area on the screen and has a radius R2 = centered on the cursor coordinates. Coordinate conversion is performed within a range of 3.8 cm so that the scale becomes smaller as the distance from the cursor coordinate increases, and a map image (second image area) with north facing upward is drawn in the video RAM 13 (steps 210, 21).
1, FIG. 7A to FIG. 7D). This calculation is performed according to the following equation (see FIGS. 7E and 7F). X-Xc + 3.8 = (0.4 cm / 525 m) (x-xc + 950) (xc-950 ≦ x <xc-425) X-Xc = (3.4 cm / 425 m) (x-xc) (xc-425 < x <xc + 425) X-Xc-3.8 = (0.4 cm / 525 m) (x-xc-950) (xc + 425 ≦ x ≦ xc + 950) Y-Yc + 3.8 = (0.4 cm / 525 m) (y-yc + 950) ) (Yc-950 <y <yc-425) Y-Yc = (3.4cm / 425m) (y-yc) (yc-425 <y <yc + 425) Y-Yc-3.8 = (0.4cm / 525m) (y-yc-950) (yc + 425 ≦ y ≦ yc + 950)

Next, the map image drawing unit 12 reduces the scale by one step to reduce the scale D to 1/100000, and then removes the first and second map areas, and the actual distance r3 ( D) = Map data within the range of 8400 m (third map area) is read to the buffer memory 11, and the read map data is a radius centered on the cursor coordinates outside the first and second image areas on the screen. Within the range of R3 = 4.2 cm, coordinate conversion is performed so that the scale becomes smaller as the distance from the cursor coordinate increases, and a map image (third image area) with north facing upward is drawn in the video RAM 13 (steps 212, 213, See FIGS. 8A and 8B). This calculation is performed according to the following equation (FIG. 8 (c),
(D)). X-Xc + 3.8 = (0.4 cm / 7450 m) (x-xc + 950) (xc-8400 ≦ x ≦ xc-950) X-Xc = (3.8 cm / 950 m) (x-xc) (xc-950 < x <xc + 950) X−Xc−3.8 = (0.4 cm / 7450 m) (x−xc−950) (xc + 950 ≦ x ≦ xc + 8400) Y−Yc + 3.8 = (0.4 cm / 7450 m) (y−yc + 950) ) (Yc-8400 ≦ y ≦ yc-950) Y-Yc = (3.8 cm / 950 m) (y-yc) (yc-950 <y <yc + 950) Y-Yc-3.8 = (0.4 cm / 7450m) (y-yc-950) (yc + 950 ≦ y ≦ yc + 8400)

Next, the map image drawing unit 12 reduces the scale by one step to reduce the scale D to 1/200000, and then excluding the first to third map areas, the vertical axis is centered at the cursor coordinates 18000 m × horizontal. The map data (4th map area) in the range of 24000 m (9.0 cm long by 12.0 cm wide centering on the vehicle position on the screen) is read into the buffer memory 11, and the map image with the north facing upward (4th image area) is read. ) Is drawn in the video RAM 13 (see steps 214 and 215, FIGS. 9A and 9B). This calculation is calculated according to the following equation (see FIGS. 9C and 9D). X-Xc = (6.0 cm / 12000 m) (x-xc) (xc-12000 ≦ x ≦ xc + 12000) Y-Yc = (4.5 cm / 9000 m) (y-yc) (yc-9000 ≦ y ≦ yc + 9000)

After this, a cross cursor mark is drawn in the center of the map image and displayed on the screen (steps 216, 2).
17). Next, it is checked whether the scroll timer 2 has timed out (step 218), and if not, it is checked whether the same scroll key is continuously pressed (step 219). If the same key is continuously pressed, it is checked whether or not the scroll timer 2 is counting time (step 220), and if NO, the scroll timer 2 is set to 3 seconds and started (step 2).
21), the processing from step 203 onward is repeated. At step 218, if the scroll timer 2 is up, it is checked whether R1 is zero (step 22).
2) If YES, repeat step 203 and subsequent steps,
If NO, 1.7 cm is subtracted from R1 to set the value as a new R1, and the processing after step 221 is performed (step 2).
23). If the same scroll key is not continuously pressed in step 219, the scroll timer 2 is stopped, R1 is set to 3.4 cm, and it is checked whether or not the scroll key is pressed (steps 224 to 22).
6). If the scroll key is pressed, step 20
After 3 is repeated, if not pressed, it is checked whether the navigation mode setting key is pressed (step 227). If the navigation mode setting key is pressed, step 101 and subsequent steps are repeated, and if not pressed, step 203 and subsequent steps are repeated.

As a result, the user can reduce the scale D = 1/125.
If you select 00 map data and keep pressing the same scroll key while the map data is being displayed, the map image at the scale D = 1/12500 will be reduced to a radius of 1.7 cm after 3 seconds, 3 seconds later, D = 1/1
All 2500 map image parts have disappeared and the scale D = 1 /
Replaced with 25,000 map images (Fig. 15 (a) ~
(F)). Then, when the scroll key is released at the desired cursor position, the original detailed map image corresponding to the cursor position gradually appears in the reverse process of the above, so that the scroll operation is easy. In this way, the first image area becomes smaller and gradually replaces the second image area in a state where the ranges of the third and fourth image areas in the peripheral portion of the screen do not change, so that it is easy to understand before and after the map change, and Since the scale is reduced by one step, the scroll unit distance for moving on the screen by a fixed distance for a fixed time increases, and the scroll speed improves.

[0019]

According to the present invention, one screen is divided into a plurality of image areas, the detailed map data is displayed in the area to which the vehicle belongs, and the wide area map data is displayed in the adjacent areas with scale reduction as necessary. Since the scale gauge mark is scanned and displayed on the screen together with the scale of the map data to which the mark belongs, the scale of the map data of each image area can be easily discriminated. Also, the vehicle position mark,
When various marks such as scale gauge mark, user set point mark, locus mark, cursor mark, etc. and framed characters are in the scaled image area, the shapes of the various marks and framed characters are changed and displayed. Therefore, it is possible to easily determine that the map data has been scale-converted. Furthermore, if the same scroll key is continuously operated, the image area to which the vehicle belongs gradually narrows and eventually disappears, and it is replaced with an adjacent small scale map image, so it is easy to understand before and after the map change. Also, the scroll speed can be improved.
Further, when the scroll key is released at the desired cursor position, the original detailed map image corresponding to the cursor position gradually appears, and the scroll operation becomes easier.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a vehicle-mounted navigation device according to the present invention.

FIG. 2 is a first diagram showing the operation of the navigation controller.
2 is a flowchart of.

FIG. 3 is a second diagram showing the operation of the navigation controller.
2 is a flowchart of.

FIG. 4 is a third diagram showing the operation of the navigation controller.
2 is a flowchart of.

FIG. 5 is a fourth view showing the operation of the navigation controller.
2 is a flowchart of.

FIG. 6 is an explanatory diagram of a screen display example.

FIG. 7 is an explanatory diagram of a screen display example.

FIG. 8 is an explanatory diagram of a screen display example.

FIG. 9 is an explanatory diagram of a screen display example.

FIG. 10 is an explanatory diagram of a screen display example.

FIG. 11 is an explanatory diagram of a screen display example.

FIG. 12 is an explanatory diagram of a screen display example.

FIG. 13 is an explanatory diagram of a screen display example.

FIG. 14 is an explanatory diagram of a screen display example.

FIG. 15 is an explanatory diagram of a screen display example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 CR-ROM 2 Vehicle position detection part 3 Operation part 4 Display device 10 Navigation controller 11 Buffer memory 12 Map drawing control part 13 Video RAM 14 Video conversion part 15 Running track memory

Claims (3)

[Claims] 1. A map data storage means for storing map data by scale, a vehicle position detection means for detecting a vehicle position and a vehicle direction, and drawing map data of a desired scale level in a predetermined area to which the vehicle belongs, and In a predetermined area adjacent to the area, map data having a scale level smaller than the scale level is drawn with or without scale conversion, and a vehicle position mark and a scale gauge mark are drawn and displayed on the display means on a map. In a vehicle-mounted navigation device including image drawing means, the map image drawing means draws a scale of map data of an area to which the scale gauge mark belongs when drawing the scale gauge mark across each area. In-vehicle navigation device characterized by the above. 2. A map data storage means for storing map data for each scale, a vehicle position detection means for detecting a vehicle position and a vehicle azimuth, map data of a desired scale level drawn in a predetermined area to which the vehicle belongs, and In a predetermined area adjacent to the area, map data with a scale level smaller than the scale level is scale-converted or drawn without scale conversion, and a vehicle position mark, scale gauge mark, user-set point mark, trajectory mark, cursor mark A map image drawing means for drawing a mark or / and a framed character on the display means for screen display, and the map image drawing means draws the mark or / and the framed character. In the area where the map data to which the mark or / and the framed character belongs is scale-converted, The vehicle navigation apparatus according to claim, that was different from the shape of the area which is not to scale converts the shape of the / and the frame. 3. A map data storage means for storing map data by scale, a vehicle position detection means for detecting a vehicle position and a vehicle direction, a scroll key for scrolling a map, and a desired scale level in a predetermined area to which the vehicle belongs. Draw map data, and draw map data of a scale level smaller than the display scale level in a predetermined area adjacent to the area with or without scale conversion,
In a vehicle-mounted navigation device provided with a map image drawing means for drawing a vehicle position mark and displaying it on the screen of the display means, the map image drawing means displays the vehicle on the screen when the same scroll key is continuously operated. The in-vehicle navigation device is characterized by narrowing the area to which the vehicle belongs.