JP2000292190A - Map display method and device in navigation system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To display an entire path on a map without changing a scale halfway by monitoring distance from a current position to a destination, automatically changing a next scale map when it is judged that the next scale data can display a path from the current position to the destination within the surface maximum display range. SOLUTION: A guide path is constantly monitored by a sensor part 5 and a driving route-monitoring part 6 for constantly monitoring distance to a destination according to a map data in a storage 4 and a current position and for promoting the switching of a map scale to a display-processing part 2 while a path from the current position of an own vehicle to a destination is being guided. The guide path is being constantly displayed on the screen of the display part 2. When it is judged that the path guide from the current position to the destination can be displayed on a screen 3 with a scale that is in more details than the current map scale during driving, the scale is automatically changed to a more detailed one. When the path cannot be within the maximum display range of the screen 3 after the scale has been switched, the map scale is automatically changed by the driving route-monitoring part 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a CD-ROM, a DVD-ROM
The present invention relates to a map display method and apparatus in a navigation system used for vehicle route guidance or the like based on map information stored in the map information.

[0002]

2. Description of the Related Art Conventionally, in a map display device in a navigation system, guidance by a map displayed on a screen of a display unit is provided at a scale set by a user first, and thereafter provided at the same scale unless reset again in the middle. Has been done.

[0003] Further, in a conventional map display device, a display surface of a display unit is divided into a plurality of screens so that multiple screens are displayed at the same time. The scale of the map on each screen is displayed at the scale initially set by the user.

[0004]

As described above, in the conventional map display device, guidance is provided at the initially set scale unless the user resets the route. However, for example, display of a route that has been completed is often meaningless to the user. Therefore, when omitting the display of the route that has been completed, and trying to change the map scale so that the entire route from the current position to the destination fits within the maximum display range of the screen, the user must There was a problem that the scale had to be changed.

[0005] In addition, the demands regarding the way of providing guidance on a map also differ from user to user. Therefore, it is desired that a map can be displayed in various modes.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems. A first object is to automatically set a map scale at which a user can display all routes from a current position to a destination without changing the scale on the way. It is an object of the present invention to provide a map display method and apparatus in a navigation system that can be changed.

A second object of the present invention is to provide a map display device capable of simultaneously displaying all routes from a departure place to a destination in addition to displaying a route from a current location to a destination. is there.

A third object of the present invention is to simultaneously display the route from the current location to the destination and the entire route from the departure location to the destination, and to display on a map other than the route to be guided. It is an object of the present invention to provide a map display device that does not use the map display device.

[0009]

In order to achieve the above object, the present invention monitors the distance from a current position to a destination, and stores the next scaled map data within the maximum display range of the screen. When it is determined that the route from the route to the destination can be displayed, the map is automatically changed to the next reduced scale map and can be displayed.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is a method for displaying a map in a vehicle-mounted or portable navigation system, wherein a distance from a current position to a destination is monitored. If it is determined that the next map data having a different scale can display the route from the current position to the destination within the maximum display range of the screen on the large scale map data, the map data is changed to the large scale map data. This is a map display method in a navigation system, characterized in that the route from the current position to the destination falls within the maximum display range of the screen without displaying the route that has been completed. Since the map scale is automatically changed to the map scale, an appropriate map display can be performed without the user or the like changing the scale each time.

The present invention according to claim 2 of the present invention monitors the distance from the current position to the destination, and displays the route from the current position to the destination within the display range of the screen on the map data of the current scale. 2. The map display method in the navigation system according to claim 1, wherein when it is determined that the map data cannot be displayed, the map data is changed to the map data of the next smaller scale than the current scale and displayed. Even if a route change or the like is performed after the change and a guide route from the current position to the destination cannot be displayed, it is possible to respond by changing the map back to the previous scale.

According to a third aspect of the present invention, there is provided a map display device for a vehicle-mounted or portable navigation system, comprising: a current position grasping means for grasping a current position of a vehicle; Storage means for storing data; display means having a screen for displaying a map; display processing means for extracting map data from the storage means and displaying the data on the screen via the display means; A travel route monitoring means for monitoring the distance from the destination to the destination and prompting the display processing means to retrieve map data created at a scale that can be displayed within the maximum display range of the screen. This is a map display device in a navigation system that does not display the route that has been completed, but is located within the maximum display range of the screen from the current position. Since all route to earth is automatically changed to the size map scale of fit has the effect that the user or the like can be Eligible map display without changing the scale each time.

According to a fourth aspect of the present invention, in the display mode, the display processing unit divides the screen of the display unit into a plurality of screens and can switch different map data to be displayed on each of the divided screens. 4. A map display device in a navigation system according to claim 3, wherein said map display device includes a switching means, and has an effect that different maps and the like can be displayed on divided screens on the same display surface.

According to a fifth aspect of the present invention, the display processing means divides the fixed-scale map data and the reduced-scale map data promptly switched and displayed by the traveling route monitoring means, respectively. 5. The map display device in the navigation system according to claim 4, wherein the map display device can be simultaneously displayed on different screens, and is switched and displayed by prompting the map data of a fixed scale and the traveling route monitoring means. This has the effect that both scaled map data can be displayed simultaneously on the same display surface.

The invention according to claim 6 of the present invention is characterized in that the display processing means does not display anything other than the guide route and the current position on the screen. Since this is a map display device in a navigation system and does not display anything other than the guide route and the current position on the screen, it has the effect of removing information that becomes noise and making it easier to see the map.

The invention according to claim 7 of the present invention is characterized in that the display processing means can display a route taken from a departure place to a specific position. It is a map display device in the navigation system according to any one of 3 to 6, wherein a route taken from a departure place to a specific position can be known later, and is used as a reference when determining a route in the future. It has the effect of being able to.

(Embodiment) Hereinafter, a map display device according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a configuration in the present embodiment. In FIG. 1, reference numeral 1 denotes a display processing unit (CPU) which controls the entire navigation system and switches the map display mode and the like. Reference numeral 2 denotes a display unit having a screen 3 for displaying information such as a map and the position of the vehicle. Reference numeral 4 denotes a storage unit, which is a program by which the display processing unit 1 processes the entire navigation system according to a predetermined procedure, for example, 1 / 800,000, 1 / 400,000, 1/200000, 1/10
Map data and the like of a type reduced to 10,000, 1/10000, 1/5000, and 1/1000 are stored. Reference numeral 5 denotes a sensor unit, which includes, for example, a GPS, a speed sensor, and a direction sensor, and calculates and processes the position, speed, direction, and the like of the vehicle to grasp the position of the vehicle. A traveling route monitoring unit 6 constantly monitors the map scale and the distance from the current position to the destination, and urges the display processing unit 1 to switch the map scale. Reference numeral 7 denotes a readable and writable memory unit which temporarily stores setting values and the like. An operation unit 8 instructs the display processing unit 1 to switch display of a plurality of screens, switch to a menu or the like, determine a set value, and the like.

In the map display device according to the present embodiment, when a switching instruction is given by the operation unit 8, the display processing unit 1 issues an instruction to divide the screen 3 of the display unit 2 into a plurality, It controls so that the map may be displayed on the individual screens at different scales and modes. The operation will be described below.

(Display Mode 1) In this display mode 1, the map scale is automatically changed so that all the guide routes from the current position of the vehicle to the destination are within the maximum display range of the screen 3. This mode is set in advance by the operation unit 8. Further, with reference to the flowchart shown in FIG. 2, when a display instruction in the display mode 1 is given by the operation unit 8, during the route guidance from the current position of the own vehicle to the destination, the sensor unit 5 and storage unit 4 The route to the destination is constantly monitored from the map data (map scale) and the current position to the destination (step ST1), and the guide route is constantly monitored by the traveling route monitoring unit 6 that prompts the display processing unit 2 to switch the map scale. are doing. The guidance route is always displayed on the display unit 2.
Is displayed on the screen. In the middle of traveling, the map scale and the distance from the current position of the vehicle to the destination are grasped, and the route guidance from the current position to the destination can be displayed on the screen 3 at a scale smaller than the current map scale. Is determined, the map scale is automatically changed to a detailed one (step ST2). Therefore, in this switching display, an enlarged display, that is, a detailed display is performed. FIG. 3 is a scale map before switching, and FIG. 4 is a scale map after switching. FIG. 5 shows the reduced map before switching to one side and the reduced map after switching to the other side by dividing the screen 3. In FIGS. 3 to 5, reference numeral 10 denotes the current position of the vehicle.

Next, if the route from the current position to the destination does not fall within the maximum display range of the screen 3 due to a route change or the like after switching the map scale, if the map scale and the current position to the destination are changed. The travel route monitoring unit 6 that monitors the distance and prompts the display processing unit 1 to switch the map scale automatically changes the map scale so that all route guidance displays from the current position of the vehicle to the destination can be accommodated again. (Step S
T4).

(Display Mode 2) In this display mode 2, when displaying a guide route in the lower surface 3, the route other than the guide route and the current position of the vehicle are not displayed on the screen 3. This mode is set in advance by the operation unit 8.
In addition, such a display makes it easier to grasp the user's current position and the like. Further, in the display mode 2, when displaying a route, it is possible to selectively display either all routes from the departure place to the destination or routes from the current position to the destination. FIG. 6 shows the current position 10 of the own vehicle.
3 shows a state of the screen 3 displaying only a route 11 for providing guidance and the periphery of the route 11. Further, as such a display change mode, only the current position 10 of the own vehicle and the route 11 for guidance may be displayed. When such a display is performed, a blank area 15 is formed in a portion of the screen 3 other than the portion where the map (or only the route) is displayed. It is possible to display facility information and the like around 10 and to increase the functions of the map display device.

(Display Mode 3) In display mode 3, a route taken from the departure point to the current location (or destination) can be displayed.
Is set by In addition, the setting can be made either during traveling or after arriving at the destination, and can be referred to in the next route determination or the like from the route that has been followed. .

In the above embodiment, one screen 3
Although the case where the display is performed in one mode has been described above, one screen 3 is divided into two or more by switching by the user via the operation unit 8, and each screen is divided into Can be displayed at the same time.

[0024]

As is clear from the above embodiment, the map display apparatus and method in the navigation system according to the present invention do not display the route which has been completed, and display the route from the current position within the maximum display range of the screen. Since the map scale is automatically changed to a size that can accommodate all the routes to the destination, an appropriate map can always be displayed without the user or the like changing the scale each time.

[Brief description of the drawings]

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

FIG. 2 is a flowchart showing an example of an operation of a main part of the map display device according to the embodiment of the present invention;

FIG. 3 is a diagram illustrating an example of a map display mode according to the embodiment of the present invention.

FIG. 4 is a diagram illustrating an example of a map display mode according to the embodiment of the present invention.

FIG. 5 is a diagram illustrating an example of a map display mode according to the embodiment of the present invention.

FIG. 6 is a view for explaining an example of a map display mode according to the embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 display processing unit 2 display unit 3 screen 4 storage unit 5 sensor unit (current position grasping means) 6 traveling route monitoring unit 7 memory unit 8 operation unit 10 current position 11 route

Claims (7)

[Claims] 1. A map display method in an on-vehicle or portable navigation system, wherein a distance from a current position to a destination is monitored, and the distance is set within a maximum display range of a screen on map data having a scale next to the current scale. When it is determined that the next map data having a different scale can display the route from the current position to the destination, the map data is changed to the larger scale map data and displayed. Map display method. 2. When the distance from the current position to the destination is monitored, and it is determined that the route from the current position to the destination cannot be displayed within the display range of the screen on the current scale map data, 2. A map display method in a navigation system according to claim 1, wherein the map data is changed to the map data of the next smaller scale than the current scale and displayed. 3. A map display device in a vehicle-mounted or portable navigation system, comprising: a current position grasping means for grasping a current position of a vehicle; a storage means storing a plurality of map data of different scales; Display means having a screen for performing the following: display processing means for extracting map data from the storage means and displaying the map data on the screen via the display means; monitoring a distance from a current position to a destination; A travel route monitoring means for prompting the display processing means to retrieve map data created at a scale that can be displayed within the maximum display range of the map display device in the navigation system. 4. The display processing unit includes a display mode switching unit that divides the screen of the display unit into a plurality of screens and can switch different map data to be displayed on each of the divided screens. A map display device in the navigation system according to claim 3. 5. The display processing means can simultaneously display the fixed-scale map data and the reduced-scale map data that is switched and displayed by being prompted by the traveling route monitoring means on the different screens respectively divided. The map display device in the navigation system according to claim 4, wherein: 6. The map display device according to claim 3, wherein the display processing unit does not display any information other than the guide route and the current position on the screen. 7. The navigation according to claim 3, wherein said display processing means is capable of displaying a route taken from a departure place to a specific position. Map display device in the system.