JP2000181342A - Map display device and record medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a target position from being lost sight of on the map by facilitating to recognize a change in the scale when changing over a scale of a displayed map. SOLUTION: This map display device is provided with an information storage means 3 for storing a map data, an input means 1 for inputting a display position of the map and a scale to be displayed, a control means 4 for reading the map data stored in the information storage means 3 based on the display position inputted from the input means 1 and the scale to be displayed, and a display means 6 for displaying the map plotting the map data, and the control means 4 controls to display the map by setting a prescribed area on the map display screen when it is requested to change the scale, and changing it over to a requested scale, and then changing over the scale of the area outside the prescribed area to the requested scale from the one before requested.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a map display device and a recording medium for displaying a map by changing a scale according to a request for changing the scale.

[0002]

2. Description of the Related Art In a navigation apparatus for a vehicle, a route search from a starting point, a current position to a passing point, and a destination is performed based on point inputs such as a current position, a starting point, a destination, and a passing point. Provides route guidance using screens and audio based on the route. In such a device, in order to use for inputting a point such as a destination or a passing point when searching for a route, the user may independently register an arbitrary point as a memory point, or input a point such as a destination or a passing point. When selecting a category such as an address or a genre and selecting a map and inputting a desired point, an operation of switching the scale of the displayed map to enlarge or reduce it is performed. In this case, when an instruction for displaying a wide area map or a detailed map is issued in order to switch the scale of the displayed map, map data of a desired scale is stored in place of the currently displayed map data. And a process of switching the entire screen to a map display of a reduced scale according to the request.

[0003]

However, in the conventional apparatus, since the entire screen is switched according to the newly selected scaled map data as described above, especially in an urban area where the roads are in a grid pattern, Even if the user switches the scale and actually switches the scale, it may not always be possible to determine whether or not the scale has been switched. Moreover, in such a case, it is difficult to read a change in the information amount due to the scale change.

When reading map data to be displayed on the screen from an external storage means, the user has to wait until a new map is displayed due to the reading time and the transfer time of the map data. Furthermore, even when the map scale is switched, particularly when switching from the wide area map to the detailed map, the display position moves largely outside the screen, and the target position displayed on the wide area map may be lost in the detailed map. .

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and makes it easy to recognize a change in display when the scale of a display map is changed, so that a target position on the map is lost. It is to prevent.

For this purpose, according to the present invention, a predetermined area is set on a map display screen, the scale is switched to the requested scale within the predetermined area, and the map is displayed. A map display device that has control means for switching display from a map to a map of a reduced scale after a request and performing display control, and a map display device for displaying a map by switching a scale in response to a request to change the scale, and a recording medium recording a control program, When the map is displayed by switching to the requested scale in the predetermined area, the scale is continuously changed by zooming to switch.

Further, information storage means for storing map data, input means for inputting a display position of the map and a scale to be displayed, and information storage based on the display position of the map inputted by the input means and the scale to be displayed. Control means for reading and drawing map data stored in the means, and display means for displaying a map on which the map data is drawn, wherein the control means displays a map display screen when a scale change request is received. After setting a predetermined area in the predetermined area and switching to the requested scale in the predetermined area to display the map, the area outside the predetermined area is switched from the map of the pre-request scale to the map of the post-request scale and displayed. Control means, wherein the control means draws map data to be displayed in the predetermined area, and a first memory for drawing map data to be displayed on the entire screen of the display means. And a second memory, when displaying a map by switching the scale requested in said predetermined area, is characterized in that the switching by continuously changing the scale by zooming.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a view showing an embodiment of a map display device according to the present invention. An input device 1 for inputting information on route guidance, a current position detecting device 2 for detecting information on a current position of a vehicle, a route calculation. Storage device 3 storing navigation data necessary for navigation, display guidance data necessary for guidance, navigation programs, etc., performs route guidance processing and display guidance processing required for route guidance, and controls the entire system. The central processing unit 4 stores data necessary for navigation, and stores an information center provided through a communication line at the request of the driver and driver-specific data such as map data and destination data in advance. An information transmitting / receiving device 5 for exchanging data with an information source such as an electronic organizer,
It comprises an output device 6 for outputting information relating to route guidance. First, each configuration will be described.

The input device 1 instructs the central processing unit 4 to perform a navigation process according to the driver's intention so that the driver can input a destination or output guidance information by voice and / or screen when necessary. It has a function, and includes a touch switch 11 and an operation switch for inputting a destination as a telephone number or coordinates on a map and requesting route guidance as means for realizing the function. Of course, an input device such as a remote controller may be used. Here, a voice recognition device for enabling voice input and a recording card reader for reading data recorded on an IC card or a magnetic card can be added.

[0010] The information transmitting / receiving device 5 is a traffic information acquisition means VICS (Vehicle Information System; Vehicle Inform).
ation & Communication Sistem) It consists of a receiving device and a data transmitting and receiving device. VICS transmits road traffic information to vehicles by FM multiplexing (text broadcasting), radio beacons, and optical beacons in real time. FM multiplexing transmits coarse information over a wide area. 10k radius around beacon
Detailed information on a narrow area within about m, which can be received when the vehicle passes a beacon. V
The ICS transmission data indicates the degree of congestion (for example, the degree of congestion such as impassability, congestion, congestion, heavy traffic, normal traffic, etc.), the congestion head position,
It is composed of a traffic jam length, traffic regulation (construction information, traffic closure, etc.), and travel time (time required at a predetermined speed). The data transmitting / receiving device is, for example, a mobile phone or a personal computer, and is operated by a traffic information center (for example, A
It exchanges information necessary for navigation with the TIS.

The output device 6 has a function to output guidance information by voice and / or screen when the driver needs it, and to print out data processed by the central processing unit 4 and the like. Means for displaying input data on a screen or automatically displaying route guidance on a screen in response to a driver's request, data processed by the central processing unit 4 and stored in the information storage device 3. And a speaker for outputting route guidance by voice.

The display is composed of a color CRT or a color liquid crystal display, and has a route setting screen based on map data and guidance data processed by the central processing unit 4,
All screens required for navigation, such as a section map screen and an intersection map screen, are output in color display, and buttons for setting route guidance, performing guidance during route guidance, and switching screens are displayed on this screen. In particular, the passing intersection information such as the passing intersection name is displayed in color in a pop-up on the section map screen at any time. This display is provided, for example, in an instrument panel near the driver's seat, and the driver can check the current position of the own vehicle by looking at the section map, and can also obtain information on a route from now on.

The current position detecting device 2 is a device for detecting information relating to the current position of the vehicle. For example, an absolute direction sensor including a geomagnetic sensor, a relative direction sensor including a steering sensor, a gyro, and the like, It is provided with a distance sensor for detecting the traveling distance from the rotation speed, and a GPS receiver using a satellite navigation system (GPS).

The information storage device 3 is an external recording device that stores navigation programs and data, and is a recording medium such as a CD-ROM. The program consists of a map drawing unit, route search unit, route guidance unit, current position calculation unit,
It is composed of an application part and an OS part, etc., which consist of a destination setting operation control part, etc., which performs navigation signal output processing. Here, programs for processing such as route search, display output control necessary for route guidance, and voice are provided. A program for performing voice output control necessary for guidance and data necessary for the program, and further, display information data necessary for route guidance and map display are stored. Data includes map data (road map, house map, building shape map, etc.) required for route guidance, intersection data, node data, road data, photograph data, registered point data, destination point data, guide road data, Detailed destination data, destination reading data,
It consists of a file of telephone number data, address data, and other data, and stores all data necessary for the navigation device.

The central processing unit 4 non-volatilely stores a CPU for executing various arithmetic processing and important information (for example, a program for executing route search and route guidance, data for setting conditions, data of various parameters, etc.). Rewritable ROM (rewritable nonvolatile storage means)
Flash memory (eg, electrically erasable E
EPROM: Electronically Erasable and Programmab
ROM, which is a nonvolatile storage means storing a program (program reading means) for performing a program check and an update process of the flash memory,
Temporarily (volatilely) information stored for each individual, such as memory locations for registering information of arbitrary locations by the driver's operation, frequency information accumulated by the learning function, and error correction information for various detection means. (For example, SRAM: Static RAM capable of electrically storing temporarily stored information). Furthermore, an image memory that stores image data used for screen display on a display, an image processor that extracts image data from an image memory based on a display output control signal from a CPU, performs image processing, and outputs the processed image to a display. A voice processor for synthesizing voices, phrases read out from the information storage device 3 based on a voice output control signal from the CPU, synthesizing a single sentence, sound and the like, converting the synthesized signals into analog signals, and outputting the analog signals to a speaker; I have.

The navigation program and data may be read from the outside via the information transmitting / receiving device 5. By reading necessary navigation programs and data from the outside via the information transmitting / receiving device 5 in this manner, the CD
-It is possible to use a recording medium such as a DVD in place of the ROM in the information storage device 3 so that necessary programs and the latest data can be appropriately updated and stored, and the information storage device 3 can be omitted and direct central processing can be performed. It can also be stored in the flash memory or RAM of the device 4.

Next, the operation will be described. FIG. 2 is a diagram for explaining the flow of the entire system of the map display device according to the present invention.

When the program of the route guidance system is started by the CPU of the central processing unit 4, the current position is first detected by the current position detecting device 2 as shown in FIG. (Step S
1) Next, a destination is set using a telephone number, an address, a facility name, a memory point, and the like (step S2). And
Perform a route search from the current position to the destination (step S
3). When the route is determined, the route guidance / display is repeated until the vehicle arrives at the destination while tracking the current position by the current position detecting device 2 (step S4).

In the navigation apparatus according to the present invention, when the scale of the displayed map is switched in the map display when the destination is set or the memory point is registered in step S2, first, the point of interest is set. After setting and displaying a switching frame of a predetermined size as the center, the scale switching process is executed only in the area of the switching frame, and thereafter, the remaining area, that is, the scale outside the frame, is switched.
At this time, by changing the scale in the area of the switching frame by zooming, the information near the point of interest is prevented from being lost.

Next, the map scale switching process according to the present invention will be described. 3 and 4 are diagrams showing an example of a display change in the case of changing the scale from a wide area map to a detailed map, and FIGS. 5 and 6 are diagrams showing an example of performing a scale change display for position confirmation after setting a purpose. It is. Now, on the wide-area map display screen, scroll the map to find an arbitrary point to be confirmed between Ishibashi Station and Ishibashi-ji Temple as shown in FIG. 3 (A). It is assumed that the scale is switched to the detailed map by instructing with the cursor of the symbol. In this case, for example, when the scale of the detailed map is designated and change is instructed, first, as shown in FIG. 3B, a switching frame is displayed centering on the point indicated by the cursor, and the scale change process is started. I do. In the process of changing the scale, FIG.
As shown in FIG. 4C, zooming is performed only on the area of the switching frame toward the new scale, that is, the scale of the detailed map, and the area of the switching frame is cut into a map of a predetermined scale as shown in FIG. In other words, the other area remaining as shown in FIG. 4B, that is, the area outside the switching frame, is switched to a map of a predetermined scale, and the display of the switching frame is erased as shown in FIG. 4C. The scale switching process ends.

As described above, the function of setting the switching frame at the center of the screen and zooming and displaying the area of the switching frame separately from the surrounding area can also be used for confirming the position after setting the destination. . For example, as shown in FIG. 4C, when switching to a detailed map and setting a gas station with a G mark as a destination, it is difficult to confirm the positional relationship in a wide area because of the detailed map. Therefore, as shown in FIG. 5A, a wide area map with a large scale is displayed in the switching frame for a certain period of time after the destination is set. The position of the set destination can be confirmed by such a wide area display, and after a lapse of a predetermined time, the area of the switching frame is zoomed to the original scale, as shown in FIGS. 5B and 5C. In other words, return the map to the same scale as the surrounding area,
Finally, the switching frame is deleted as shown in FIG.

FIG. 7 is a diagram for explaining an example of a scale change display process according to the present invention. In the scale change display processing according to the present invention, first, a new scale to be changed is determined (step S11), and a center point at the time of scale change is calculated (step S12). In general, the cursor is displayed at the center of the screen, and the map is moved by operating the scroll keys.
Of course, as a scroll, for example, when performing display control such as moving the cursor on the screen and moving the map when the cursor hits the edge of the screen, the cursor on the screen is not the center point of the screen. Point. Next, a predetermined area around the cursor is determined (step S13), and the boundary of the predetermined area is displayed on the map as a switching frame (step S14). Subsequently, for an area outside the predetermined area, the map is continuously drawn to the determined scale only for the area of the predetermined area (stepless or Zooming display is performed by drawing the image at a predetermined step size in a stepwise manner (stepwise) (step S15). If the area of the predetermined area is displayed on the map of the determined scale (step S16), then the area outside the predetermined area is switched to the determined scale that is the same scale as the predetermined area and the map is displayed ( In step S17, the switching frame displaying the boundary line of the predetermined area is deleted from the map (step S18), and the display process of the scale change ends.

FIG. 8 is a diagram showing an example of the configuration of a display control unit for drawing and displaying map data. 11 is a map data drawing processing unit, 12 is a full screen drawing memory, 13 is a zooming drawing memory, and 14 is a display processing. Indicates a part. In FIG. 8, a full-screen drawing memory 12 expands and draws map data of a full screen to be displayed, and a zooming drawing memory 13.
Expands and draws map data to be zoom-displayed for a predetermined area when the scale is changed. The map data drawing processing unit 11 performs a process of reading map data from the information storage device based on a selected point (position, area) and scale, and developing and drawing the map data in the full screen drawing memory 12 and the zoom drawing memory 13. Things. The display processing unit 14 performs control for outputting and displaying the full-screen drawing memory 12 and the zooming drawing memory 13. In a normal map display, the display processing unit 14 outputs and displays the map drawn in the full-screen drawing memory 12, When the scale is changed, the map drawn in the zoom drawing memory 13 is preferentially output and displayed, and the map drawn in the full-screen drawing memory 12 is output and displayed for areas other than the map.

Therefore, when the display control unit is configured as described above, processing can be executed in response to a request to change the map scale as follows. First, in the case of a normal map display, when the map data to be displayed on the screen is read from the information storage device by the map data drawing processing unit 11,
The image is developed and drawn on the full-screen drawing memory 12 and output and displayed by the display processing unit 14. When there is a request to change the map scale on the display screen and a predetermined area is determined, the map data drawing processor 11 causes the zoom drawing memory 1
3, a switching frame as a boundary line of the area is drawn, and the map is repeatedly drawn in the frame while continuously changing the scale from the scale before the change request to the requested scale. During this time,
The full-screen drawing memory 12 holds the drawing data as it is. On the other hand, for example, when reading the drawing data, the display processing unit 14 gives priority to the drawing data of the zoom drawing memory 13 over the drawing data of the full-screen drawing memory 12, and sets the entire drawing data in the area of the zoom drawing memory 13 where there is no drawing data. The drawing data in the screen drawing memory 12 is read. In this way, a process of outputting the drawing data of the zoom drawing memory 13 so as to overwrite the drawing data of the full screen drawing memory 12 is performed. Finally, the map data is drawn on the full-screen drawing memory 12 at the new scale requested to be changed, and the drawing data in the zoom drawing memory 13 is deleted.

It should be noted that the present invention is not limited to the above embodiment, and various modifications are possible. For example, in the above-described embodiment, the switching frame of the reduced scale is shown as a rectangle as the boundary line of the predetermined area, but the predetermined area may be a circular image of a lens, a rhombus, another shape, or a predetermined area. May be specified, and the center of the predetermined area is not only centered on the cursor mark, but, for example, in the case of a screen displaying a mark of the current position, the current position mark is displayed. It may be centered. The zooming display may be stepless or multi-step, or may be zoomed even when the scale outside the predetermined area is switched. Furthermore, after the change of the scale in the predetermined area is completed, the scale may be kept for a certain period of time to change the scale outside the predetermined area, and the transition to the scroll mode may be enabled during that time. The zooming may be interrupted in the middle of the zooming display in the area, that is, the map may be shifted to the scroll mode while being fixed to a reduced scale. In this case, the switching frame may be moved while the display outside the predetermined area is fixed, or the display outside the predetermined area may be moved together. In the former case, when the scroll mode is released, the entire screen is switched to a map centered on the scrolled map.

[0026]

As is apparent from the above description, according to the present invention, after a predetermined area is set on the map display screen, the scale is switched to the required scale within the predetermined area, and the map is displayed. Control means for controlling display outside the predetermined area by switching from the map before the request to the map after the request, and further displaying the map by switching to the requested scale within the predetermined area; When changing the scale of the displayed map, the scale near the center point where the scale is changed is continuously switched, and the information around the point of interest is changed. Can be accurately and quickly recognized, and it is possible to prevent the user from losing the information to be confirmed, the target position on the map, and the like due to the change in the scale. Moreover,
Since the change in the scale can be seen at the boundary of the predetermined area, it is easy to confirm the change due to the change in the scale.

[Brief description of the drawings]

FIG. 1 is a diagram showing an embodiment of a map display device according to the present invention.

FIG. 2 is a diagram for explaining a flow of the entire system of the map display device according to the present invention.

FIG. 3 is a diagram showing a display change example in the case of changing the scale from a wide area map to a detailed map.

FIG. 4 is a diagram showing an example of a display change in the case of changing the scale from a wide area map to a detailed map.

FIG. 5 is a diagram showing an example of a case in which a scale change display for position confirmation is performed after a goal is set.

FIG. 6 is a diagram illustrating an example of a case in which a scale change display for position confirmation is performed after a goal is set.

FIG. 7 is a diagram for explaining an example of a scale change display process according to the present invention.

FIG. 8 is a diagram illustrating a configuration example of a display control unit that draws and displays map data.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 input device 2 current position detecting device 3 information storage device 4 central processing device 5 information transmitting and receiving device 6 output device

 ──────────────────────────────────────────────────続 き Continued on the front page (71) Applicant 000237592 Fujitsu Ten Co., Ltd. 1-2-28 Goshodori, Hyogo-ku, Kobe-shi, Hyogo (71) Applicant 000005821 Matsushita Electric Industrial Co., Ltd. (72) Inventor Yumi Shibata 6-18 Okamachi Harayama, Okazaki City, Aichi Prefecture Inside Aisin AW Co., Ltd. (72) Inventor Hiroyoshi Masuda 6-18 Okamachi Harayama Okazaki City, Aichi Prefecture Aisin AW Co., Ltd. (72) Inventor Masayuki Kimura 1 Toyota Town, Toyota City, Aichi Prefecture Inside Toyota Motor Corporation (72) Inventor Toshiya Tsurumi 1-1 1-1 Showacho, Kariya City, Aichi Prefecture Inside DENSO Corporation (72) Inventor Takashi Okada Ho, Fujitsu Ten Co., Ltd., 1-2-28, Goshodori, Hyogo-ku, Kobe-shi, Hyogo Matsushita Communication Industrial Co., Ltd. F term (reference) 2C032 HC24 2F029 AA02 AB01 AB07 AB09 AC02 AC04 AC14 AC16 5H180 AA01 BB02 BB04 BB12 BB13 FF04 FF05 FF22 FF25 FF27 F11Z11A001 JJ11 JZ10 JZ77

Claims (6)

[Claims] 1. A map display device for displaying a map by changing a scale in response to a request to change the scale, wherein a predetermined area is set on a map display screen, and the map is switched to a requested scale within the predetermined area. And a control unit for controlling the display by switching the map outside the predetermined area from the map before the request to the map after the request after displaying the predetermined area. 2. The map display device according to claim 1, wherein when the map is displayed by switching to the requested scale within the predetermined area, the scale is continuously changed by zooming to switch. 3. An information storage means for storing map data;
Input means for inputting the display position of the map and the scale to be displayed,
Control means for reading out and drawing map data stored in the information storage means based on the display position of the map and the scale displayed by the input means, and display means for displaying a map on which the map data is drawn. The control means, when there is a request to change the scale, sets a predetermined area on the map display screen, switches to the requested scale within the predetermined area, displays the map, and then displays the map A map display device, wherein display control is performed by switching the map outside the area from the map before the request to the map after the request. 4. The control means has a first memory for drawing map data to be displayed on an entire screen of a display means, and a second memory for drawing map data to be displayed in the predetermined area. The map display device according to claim 3, wherein: 5. The control device according to claim 3, wherein when the map is displayed by switching to the requested scale in the predetermined area, the control is performed by continuously changing the scale by zooming. Map display device. 6. A predetermined area is set on a map display screen in a recording medium storing a program for a map display device that displays a map by changing a scale in response to a request for changing the scale. A storage medium storing a program, wherein the display is controlled by switching the scale outside the predetermined area from the map before the request to the map after the request, after displaying the map at the reduced scale.