JP6571477B2 - Map display device and computer program - Google Patents

Description

  The present invention relates to a technique for presenting an area on a map in a map display device that displays a plurality of different scale maps.

  As a map display device that displays a plurality of different scale maps, a navigation device that displays a navigation image representing a current position and a route to a destination on a map, the map of the navigation image is displayed in a plurality of different scales. A technique for displaying images at a scale selected by the user is known (for example, Patent Document 1).

  In addition, as a technique for presenting an area on a map, a navigation device that displays a navigation image representing a current position or a route to a destination on a map, a graphic representing a strong wind area calculated from weather information, Technology (for example, Patent Document 2) for superimposing and displaying on a map, and technology for displaying a graphic representing a danger area calculated from weather information and a hazard map on a map of a navigation image (for example, Patent Document 3). Are known.

JP 2011-117801 A JP 2011-133427 JP JP 2012-252020

When a graphic representing an area is superimposed and displayed on a map as described above, the graphic representing the area is generally arranged on the map as a translucent graphic having a certain transmittance.
However, if a figure representing an area is placed on a map as a translucent figure having a certain transmittance, the visibility of the map necessary for using the map may not be ensured depending on the scale and design of the map. On the other hand, if the transmittance of the graphic representing the area is sufficiently large, the visibility of the map can always be ensured, but in this case, the graphic representing the area cannot be easily identified. .

  Accordingly, an object of the present invention is to present an area on a map in a form that does not greatly hinder the visual recognition of the map.

  To achieve the above object, the present invention provides a map display device for displaying a map, an information receiving unit for receiving area information representing an area having a specific attribute, a display device, and a plurality of different scales selectively. A map display unit that displays a map of any scale of the map on the display device, an area graphic representing an area represented by the area information received by the information receiving unit, and the map display unit on the display device And an area display unit for displaying on the displayed map. Here, the area display unit sets the transmittance of the area graphic so as to increase as the scale increases, according to the scale of the map displayed on the display device by the map display unit, The area graphic is displayed on the map displayed on the display device by the map display unit with the set transmittance.

  According to such a map display device, the visibility by displaying the area graphic in an overlapping manner while maintaining the visibility of the area graphic as much as possible in a range where the visibility of the map portion where the area graphic overlaps is not greatly impaired. Even when a large scale map image with a large degree of deterioration is displayed, it is possible to ensure the visibility of the portion of the map image where the area figures overlap.

  In order to achieve the above object, the present invention provides a map display device for displaying a map, an information receiving unit for receiving area information representing an area having a specific attribute, a display device, and a current position for calculating a current position. A map in which the map display unit displays an area graphic representing an area represented by the area information received by the information reception unit, a map display unit that displays a map on the display device, and a position display unit on the display device And an area display unit to be displayed above. Here, the area display unit is configured such that the transmittance of the area graphic is a display position of the area graphic on the map and a position corresponding to the current position calculated by the current position calculation unit on the map. The area graphic is displayed on the map displayed on the display device by the map display unit with the set transmittance.

  In order to achieve the above object, the present invention provides a map display device for displaying a map, an information receiving unit for receiving area information representing an area having a specific attribute, a display device, and a current position for calculating a current position. A map in which the map display unit displays an area graphic representing an area represented by the area information received by the information reception unit, a map display unit that displays a map on the display device, and a position display unit on the display device And an area display unit to be displayed above. Here, the area display unit calculates the transmittance of each part of the area graphic, the display position of the part of the area graphic on the map, and the current position calculation unit calculated on the map. In accordance with the distance to the position corresponding to the position, the map display unit sets the area graphic so that the area graphic becomes larger as the distance is smaller, and the area graphic is displayed with the transmittance set for each part of the area graphic. It displays on the map currently displayed on the said display apparatus.

  According to these map display devices, the visibility of the area around the current position of the map, which is estimated to be the most important for the user, is largely hindered by the area graphics while maintaining the visibility of the area graphics approximately. Can be suppressed.

  In order to achieve the above object, the present invention provides a map display device for displaying a map, an information receiving unit for receiving area information representing an area having a specific attribute, a display device, and a map for the display device. A map display unit for displaying, and an area display unit for displaying an area graphic representing an area represented by the area information received by the information receiving unit on a map displayed on the display device by the map display unit. Is. Here, the area display unit is within a range of the specific or all features represented by the map displayed on the display device by the map display unit and displayed on the display device of the map. The transmittance of the area graphic is set so as to increase as the density increases, and the area graphic is displayed on the display device by the set transmittance. Display on the map.

  According to such a map display device, the visibility by displaying the area graphic in an overlapping manner while maintaining the visibility of the area graphic as much as possible in a range where the visibility of the map portion where the area graphic overlaps is not greatly impaired. Even when a map image having a high density of map components with a large degree of deterioration is displayed, it is possible to ensure the visibility of the portion of the map image where the area figures overlap.

  In order to achieve the above object, the present invention provides a map display device that displays a map, an information receiving unit that receives area information representing an area having a specific attribute, and a display device, which are selectively different from each other. A map display unit that displays a map of any of the designs on the display device, an area graphic that represents an area represented by the area information received by the information reception unit, and the map display unit displays the map on the display device. And an area display unit for displaying on the displayed map. Here, the area display unit sets the transmittance of the area graphic, which is determined according to the design of the map displayed on the display device by the map display unit, and is different for each design, and the set transmission The area graphic is displayed at a rate on the map displayed on the display device by the map display unit.

  According to such a map display device, the visibility of the area graphic can be improved as much as possible while maintaining the visibility of the portion of the map overlapping the area graphic to a required level regardless of the map design.

Here, you may make it apply the structure of the above each map display apparatus in combination.
That is, for example, in the area display unit, the transmittance of the area graphic, the scale of the map displayed on the display device by the map display unit, the display position of the area graphic on the map, and the map According to the distance from the position corresponding to the current position calculated by the current position calculation unit above, the larger the scale, the larger the smaller the distance, the larger the smaller the distance. Good.

  Alternatively, in the area display unit, the transmittance of each part of the area graphic, the scale of the map displayed on the display device by the map display unit, and the display position of the part of the area graphic on the map And the distance from the position corresponding to the current position calculated by the current position calculation unit on the map is set to be larger as the scale is larger and larger as the distance is smaller. You may do it.

  Alternatively, in the area display section, the scale, distance, and the transmittance of the area figure determined according to the scale and distance are determined according to the design of the map displayed on the display device by the map display section. A different transmittance may be set for each design.

  Here, each of the map display devices described above, instead of displaying the area graphic at the set transmittance in the area display unit, displays the set transmittance of the area graphic as a pattern of the area graphic. You may comprise so that it may display in the form expressed in a pseudo manner by the pattern.

Each of the map display devices described above may be provided with a current position display unit that displays a mark representing the current position on the map displayed on the display device by the map display unit.
Further, in each of the map display devices described above, the area having the specific attribute represented by the area information is an area where the specific weather condition occurs or an area where specific traffic regulations are implemented. Good.

  As described above, according to the present invention, it is possible to present an area on a map in a form that does not greatly hinder the visual recognition of the map.

It is a block diagram which shows the structure of the vehicle-mounted system which concerns on 1st Embodiment of this invention. It is a figure which shows the example of a display of the navigation image which concerns on 1st Embodiment of this invention. It is a figure which shows the area information and the transmittance | permeability table which concern on 1st Embodiment of this invention. It is a flowchart which shows the area display process which concerns on 1st Embodiment of this invention. It is a figure which shows the example of a display of the area which concerns on 1st Embodiment of this invention. It is a figure which shows the transmittance | permeability table which concerns on 3rd Embodiment of this invention. It is a flowchart which shows the area display process which concerns on 3rd Embodiment of this invention. It is a figure which shows the example of a display of the area which concerns on 3rd Embodiment of this invention. It is a figure which shows the example of a display of the area of the transmittance | permeability table and coefficient table which concern on 4th Embodiment of this invention. It is a figure which shows the other example of a display of the area which concerns on embodiment of this invention. It is a figure which shows the other example of a display of the area which concerns on embodiment of this invention.

Hereinafter, embodiments of the present invention will be described.
First, the first embodiment will be described.
FIG. 1 shows a configuration of an in-vehicle system according to the first embodiment.
The in-vehicle system is a device mounted on an automobile. As shown in the figure, the in-vehicle system includes a navigation device 1, an operation unit 2, a display device 3, a vehicle state sensor 4, a GPS receiver 5, and information reception. The apparatus 6 is comprised.

  Here, the vehicle state sensor 4 is various sensors that detect a vehicle state, such as an azimuth sensor such as an angular acceleration sensor or a geomagnetic sensor, or a vehicle speed sensor such as a vehicle speed pulse sensor.

  The information receiving device 6 is a receiving device that receives traffic information, disaster information, and weather information. Here, the information receiving device 6 receives these information via FM multiplex broadcasting or narrow area communication with a roadside device.

  Next, the navigation device 1 includes a storage device 11 such as an HDD that stores map data representing a map, a current state calculation unit 12, a GUI control unit 13 that provides a user with a GUI using the operation unit 2 and the display device 3, A route search unit 14, a memory 15, a control unit 16, and a navigation image generation unit 17 are included.

  However, the above navigation apparatus 1 may be a CPU circuit having a general configuration including peripheral devices such as a microprocessor, a memory, and other graphic processors and geometric processors in terms of hardware. In this case, each unit of the navigation device 1 described above may be realized by a microprocessor executing a program prepared in advance. In this case, such a program may be provided to the navigation apparatus 1 via a recording medium or an appropriate communication path.

Now, in such a configuration, the current state calculation unit 12 of the navigation device 1 repeatedly performs the following processing.
That is, the current state calculation unit 12 is a map around the current position determined last time indicated by the map data read from the storage device 11 with respect to the current position estimated from the outputs of the vehicle state sensor 4 and the GPS receiver 5. The most likely coordinates as the current position and the most likely direction as the current traveling direction are determined as the current position and the current traveling direction, respectively, and are set in the memory 15.

  In addition, the control unit 16 accepts a destination setting from the user via the operation unit 2 and the GUI control unit 13 in response to a user destination setting request, and sets the destination setting in the memory 15 and the route search unit 14. Starts the execution of the route setting process, and sets the guidance route to the destination set in the memory 15.

  In addition, when the current position set in the memory 15 is near the destination, the control unit 16 determines that the destination has arrived, and also performs processing for clearing the destination and the guidance route set in the memory 15. .

  In addition, the control unit 16 sets the display direction so that the current traveling direction set in the memory 15 or the north direction is up, and sets the map display scale according to the user setting or initial setting made in advance. To do.

  The navigation image generation unit 17 sets, as a map display range, a geographical range having a predetermined size determined according to the set display orientation and the set map display scale around the current position with respect to the current position. To do.

  And the navigation image generation part 17 produces | generates the map image which represents the map in the map display range by the set map figure display scale based on the map data in the set map display range. Here, in the generation of the map image, the navigation image generation unit 17 selects roads, facilities, and other map components to be included in the map represented by the map image according to the map map display scale. That is, for the roads and facilities, the navigation image generation unit 17 according to the map map display scale so that the smaller the map display scale is, the more main roads and more major facilities appear in the map image. Select roads and features to be included in the map represented by the map image. More specifically, for example, if the map components attached to the road, such as a road or a road name or a one-way display, are shown, the navigation image generation unit 17 may express a highway or a national road when the map display scale is small. If the map display scale is medium, only prefectural roads and main municipal roads are included in addition to the main roads and map elements attached to the roads. And map components attached to the road are included in the map image, and if the map display scale is large, all roads registered in the map data including narrow streets and map components attached to the road are included in the map image. include. Further, regarding the facilities, the navigation image generation unit 17 includes only facilities known as landmarks in the map image when the map display scale is small, and known as landmarks when the map display scale is medium. In addition to these facilities, public facilities such as stations and parks are included in the map image, and when the map display scale is large, all facilities registered in the map data are included in the map image.

  Further, the navigation image generation unit 17 generates a navigation image by drawing a current position mark at a position corresponding to the current position set in the memory 15 on the generated map image. However, when the destination and the guidance route are set in the memory 15, the navigation image generation unit 17 indicates the destination mark indicating the position of the destination on the map image and the guidance route on the map image in addition to the current position mark. A navigation route image is also generated by drawing a guidance route graphic representing the position on the map image.

Then, the navigation image generation unit 17 generates the generated navigation image and displays it on the display device 3 via the GUI control unit 13.
FIG. 2 shows a navigation image displayed on the display device 3 in this way.
As shown in the figure, a navigation image 200 includes a current position mark 202 representing a current position and a guidance route representing a guidance route on a map image 201 representing a map within a map display range that is a range around the current position on a map display scale. The figure 203 and the destination mark 204 representing the destination are displayed.

Hereinafter, in such an in-vehicle system, an operation of presenting an area on the navigation image 200 based on information received by the information receiving device 6 will be described.
Now, the area information is included in the traffic information, the disaster information, and the weather information received by the information receiving device 6 in FIG.
As shown in FIG. 3a, the area information includes an information type that represents the type of the area information, area coordinate data that represents the geographical range of the area in coordinates, and an information expiration date that represents the time period during which the area information is valid. .

  Here, as the type of area where the area coordinate data of the area information represents a geographical range, there are areas where entry is prohibited due to events, areas where specific weather events such as heavy rain and strong wind are occurring or expected, etc. The type of area in which the area coordinate data of the area information represents a geographical range is indicated by the information type of the area information.

  Here, if the information receiving apparatus 6 receives such area information, the control unit 16 stores the received area information in the memory 15. In addition, the control unit 16 also performs processing for deleting the area information whose information expiration date is in the past from the storage device 11.

Next, in the storage device 11, in addition to the map data described above, a transmittance table is stored in advance.
As shown in FIG. 3b, the transmittance table is a table in which the transmittance is registered with respect to the scale, and the transmittance registered with respect to each scale is set so as to increase as the scale increases.

Now, the navigation image generation unit 17 performs area display processing in order to present the area represented by the area information stored in the memory 15 to the user.
Hereinafter, this area display process will be described.
FIG. 4 shows the procedure of area display processing.
As shown in the figure, in this area display processing, first, at least a part of the geographical range of the map represented by the map image 201 included in the navigation image currently overlaps from the area information stored in the storage device 11. Area information in which area coordinate data representing a geographical range is registered is extracted (step 402).

Next, the transmittance corresponding to the map display scale of the current navigation image 200 is obtained by referring to the transmittance table and set as the area graphic drawing transmittance (step 404).
In step 402, the following processing is performed for each extracted area information (steps 406, 410, and 412).
That is, an area graphic that is a graphic representing the geographical range indicated by the area coordinate data of the area information on the map image 201 is drawn on the map image 201 with a drawing color corresponding to the information type of the area information. However, the area graphic is drawn on the map image 201 so as to transmit the map image 201 below the area graphic with the transmittance indicated by the area graphic drawing transmittance set in step 404 (step 408).

The correspondence between the information type of the area information and the drawing color is determined in advance.
If the area graphic is drawn for all the extracted area information, the predetermined period elapses (step 414), and all the area graphics on the map image 201 are deleted (step 416). Return to processing.

The area display process performed by the navigation image generation unit 17 has been described above.
According to such area display processing, as shown in FIG. 5, the area graphic 500 is displayed with different transmittances according to the scale of the map represented by the map image 201 of the current navigation image 200.

  5a shows a navigation image 200 when the map scale is 1/2500, FIG. 5b shows a navigation image 200 when the map scale is 1/5000, and FIG. 5c shows a map scale of 1/10000. FIG. 5d shows the navigation image 200 when the map scale is 1/25000.

  Further, the transmittance of the area graphic 500 of FIG. 5a is 70%, the transmittance of the area graphic 500 of FIG. 5b is 65%, the transmittance of the area graphic 500 of FIG. 5c is 60%, and the transmittance of the area graphic 500 of FIG. Is 50%.

  Thus, according to the present embodiment, the area graphic 500 has a higher transmittance as the scale of the map becomes larger, and is drawn on the map image 201 in a more transparent form. Therefore, as the scale of the map increases, the portion of the map image 201 that overlaps the area graphic 500 becomes easier to visually recognize.

  Here, since a map with a large scale has a high density of map components such as roads and facilities appearing in the map, the degree of deterioration in the visibility of the portion of the map displayed by overlapping the area graphic 500 is small in scale. Bigger than the map. On the other hand, in the first embodiment, the area graphic 500 is displayed with a larger transmittance as the scale of the displayed map is larger. Therefore, according to the first embodiment, the map image 201 with a large scale is displayed while maintaining the visibility of the area graphic 500 as much as possible in a range where the visibility of the map portion where the area graphic 500 overlaps is not greatly impaired. In this case, the visibility of the portion of the map image 201 where the area graphic 500 overlaps can be ensured.

The first embodiment of the present invention has been described above.
Hereinafter, a second embodiment of the present invention will be described.
In the second embodiment, the transmittance of the area graphic 500 in the first embodiment is changed according to the scale of the map represented by the map image 201 displayed in the navigation image 200. The map image 201 is changed in accordance with the density of map components in the map.

Here, this 2nd Embodiment differs from 1st Embodiment mentioned above only in the following points.
That is, in the second embodiment, instead of the transmittance table shown in FIG. 3b, the correspondence between the density of the map components and the transmittance is described so that the corresponding transmittance increases as the density increases. A transmittance table is provided.

  In the second embodiment, in step 404 of the area display process, the density of map constituent elements (graphic elements representing roads, facilities, and other features) in the map represented by the displayed map image 201 is determined. The transmittance corresponding to the calculated density is obtained from the transmittance table, and the obtained density is set as the area graphic drawing transmittance. Here, as the density of map components in the map, the number of roads appearing in the map represented by the map image 201, the number of facilities appearing in the map represented by the map image 201, and the number of the roads concerned The sum or weighted sum of the number of facilities and the total number of map components appearing in the map represented by the map image 201 can be used.

  Here, a map having a high density of map components in the map has a greater degree of deterioration in visibility of a portion of the map in which the area graphic 500 is displayed in an overlapping manner than a map having a low density. On the other hand, in the second embodiment, the area graphic 500 is displayed with a larger transmittance as the density of the map components of the displayed map is larger. Therefore, according to the second embodiment, a map having a high density of map components while maintaining the visibility of the area graphic 500 as much as possible within a range in which the visibility of the map portion on which the area graphic 500 overlaps is not greatly impaired. Even when the image 201 is displayed, the visibility of the portion of the map image 201 where the area graphic 500 overlaps can be ensured.

The second embodiment of the present invention has been described above.
Hereinafter, a third embodiment of the present invention will be described.
In the third embodiment, the transmittance of the area graphic 500 in the first embodiment is changed according to the scale of the map represented by the map image 201 displayed in the navigation image 200. Each figure is changed according to the distance on the map image 201 of the navigation image 200 between the area figure 500 and the current position.

Here, the third embodiment is different from the first embodiment described above only in the following points.
That is, in the third embodiment, instead of the transmittance table shown in FIG. 3b, as shown in FIG. 6, the distance D on the map image 201 of the navigation image 200 between the area graphic 500 and the current position and the transparency are shown. A transmittance table in which the correspondence with the rate is registered is provided. Here, in the transmittance table, the correspondence between the distance D and the transmittance is registered so that the corresponding transmittance increases as the distance D decreases. Note that L in the figure represents the vertical length of the map image 201.

In the third embodiment, the navigation image generation unit 17 performs the area display process shown in FIG. 7 instead of the area display process shown in FIG.
As shown in the figure, in the third embodiment, in the area display process, the navigation image generation unit 17 first includes the map image 201 included in the navigation image from the area information stored in the storage device 11. The area information where the geographical range of the map represented by and the area coordinate data representing the geographical range at least partially overlapping is registered is extracted (step 702).

In step 702, the following processing is performed for each extracted area information (steps 704, 712, and 714).
That is, first, the shortest distance from the current position calculated by the current state calculation unit 12 to the geographical range of the area represented by the area coordinate data of the area information is calculated, and the current map display scale is set to the calculated shortest distance. The multiplied distance is set to a distance D on the map image 201 of the navigation image 200 between the area graphic 500 and the current position (step 706).

Next, the transmittance corresponding to the calculated distance D is obtained with reference to the transmittance table and set as the area graphic drawing transmittance (step 708).
Then, an area graphic 500 that is a graphic representing the geographical range indicated by the area coordinate data of the area information on the map image 201 is drawn on the map image 201 with a drawing color corresponding to the information type of the area information. However, the area graphic 500 is drawn on the map image 201 so as to transmit the map image 201 below the area graphic 500 with the transmittance indicated by the area graphic drawing transmittance set in step 708 (step 710). .

The correspondence between the information type of the area information and the drawing color is determined in advance.
If the area graphic 500 is drawn for all the extracted area information, the predetermined period has elapsed (step 716), and all the area graphic 500 on the map image 201 is deleted (step 718). Return to processing from.

The area display process performed by the navigation image generation unit 17 has been described in the third embodiment.
According to the third embodiment, as shown in FIG. 8A, the area graphic 500 is displayed with different transmittances according to the distance D on the map image 201 of the navigation image 200 with the current position. become.

Here, the transmittance of the area graphic 500a that is relatively close to the current position in FIG. 8a is 70%, and the transmittance of the area graphic 500b that is relatively far from the current position is 50%.
Thus, according to the present embodiment, the area graphic 500 has a higher transmittance as it is displayed closer to the current position, and is drawn on the map image 201 in a more transparent form. Therefore, while maintaining the visibility of the area graphic 500, it is possible to prevent the area graphic 500 from obstructing the visual recognition of the portion around the current position of the map image 201 that is most important for driving a car. it can.

Heretofore, the third embodiment of the present invention has been described.
Here, in the third embodiment described above, the transmittance used for drawing is set with the area graphic 500 as a unit, but this may be done by setting the transmittance used for drawing for each pixel of the area graphic 500. Good. That is, in this case, each pixel of the area graphic 500 is drawn with a transmittance according to the distance between the drawing position of the pixel and the current position on the map image 201. Here, the transmittance according to the distance between the pixel drawing position and the current position on the map image 201 is set so that the transmittance increases as the distance decreases.

  Even in this case, as shown in FIG. 8B, the area graphic 500 has a higher transmittance as it is closer to the current position, and is drawn on the map image 201 in a more transparent form. While maintaining the visibility of 500 approximately, it is possible to prevent the area graphic 500 from obstructing the visual recognition of the portion around the current position of the map image 201 that is most important in driving the automobile.

Next, a fourth embodiment of the present invention will be described.
In the fourth embodiment, the transmittance of the area graphic 500 in the third embodiment is changed according to the distance on the map image 201 of the navigation image 200 between the area graphic 500 and the current position. Each area graphic is changed according to both the scale of the map and the distance on the map image 201 of the navigation image 200 between the area graphic 500 and the current position.

Here, the fourth embodiment is different from the above-described third embodiment only in the following points.
That is, in the fourth embodiment, the transmittance table shown in FIG. 9a and the coefficient table shown in FIG. 9b are provided in place of the transmittance table shown in FIG.
Here, the transmittance table shown in FIG. 9a is a table in which the transmittance is registered with respect to the scale similarly to the transmittance table shown in FIG. 3b, and the transmittance registered for each scale has a large scale. It is set to become larger. Further, the coefficient table shown in FIG. 9b is provided with a transmittance table in which the correspondence between the distance D on the map image 201 of the navigation image 200 between the area graphic 500 and the current position and the coefficient is registered. Here, the correspondence between the distance D and the coefficient is registered in the coefficient table so that the corresponding coefficient increases as the distance D decreases.

  In the fourth embodiment, in step 708 of the area display process of FIG. 7, the transmittance corresponding to the map display scale of the current navigation image 200 is obtained with reference to the transmittance table, and the calculated distance is calculated. A coefficient corresponding to D is obtained by referring to the coefficient table, and a transmittance obtained by multiplying the transmittance corresponding to the map display scale by the obtained coefficient is set as the area graphic drawing transmittance.

  According to the fourth embodiment, the area graphic 500 has different transmittances according to the scale of the map image 201 of the navigation image 200 and the distance D on the map image 201 of the navigation image 200 from the current position. Will be displayed.

  That is, as shown in FIGS. 9c and 9d, the transmittance of the area graphic 500 increases as the scale of the map image 201 increases, and the distance D between the area graphic 500 and the current position on the map image 201 decreases. growing.

  9c shows the navigation image 200 when the map scale is 1/2500, and FIG. 9d shows the navigation image 200 when the map scale is 1/25000. Further, the transmittance of the area graphic 500c in the map image 201 of 1/2500 in FIG. 9c is 70%, and the transmittance of the area graphic 500d is 84%, which is in the map image 201 of 1/25000 in FIG. 9d. The transmittance of the area graphic 500e is 55%, and the transmittance of the area graphic 500f is 66%.

  As described above, according to the fourth embodiment, if the position of the area graphic 500 on the map image 201 is the same, the transmittance of the area graphic 500 increases as the scale of the map image 201 increases, and the same map For the area graphic 500 on the image 201, the transmittance of the area graphic 500 increases as the distance D from the current position on the map image 201 decreases.

Heretofore, the fourth embodiment of the present invention has been described.
Here, in each of the embodiments described above, the navigation image generation unit 17 has a function of changing the design and color scheme of the navigation image 200 according to the user settings, day and night time zones, and the like. Furthermore, the area figure drawing transmittance set as described above may be corrected in accordance with the design and color scheme of the navigation image 200.

  That is, for example, the design of the navigation image 200 to be displayed is set between the user's setting, the day / night time zone, etc., between the design with a high color scheme shown in FIG. 10a and the design with a low color scheme shown in FIG. 10b. When switching according to the area graphic drawing transmittance set as described above in each embodiment, when the navigation image 200 having a color scheme with a strong contrast shown in FIG. Are corrected so as to be smaller than when the navigation image 200 having a color scheme with a weak contrast is displayed. More specifically, for example, when the navigation image 200 having a color scheme with a strong contrast shown in FIG. 10a is displayed, 0.9 times the area graphic drawing transmittance set as described above in each embodiment. When the transmissivity is the transmissivity used for drawing the area graphic 500 and the navigation image 200 having a color scheme with a low contrast shown in FIG. 10B is displayed, the area graphic drawing set as described above in each embodiment. The transmittance that is 1.1 times the transmittance is the transmittance that is used to draw the area graphic 500.

  By doing so, the visibility of the area graphic 500 is improved as much as possible while maintaining the visibility of the portion of the map image 201 that overlaps the area graphic 500 to a required level regardless of the design of the navigation image 200. Will be able to.

Further, in each of the above embodiments, the expression of translucency at each transmittance of the area graphic 500 may be performed in a pseudo manner by the pattern (pattern) of the area graphic 500.
11a1 is a pattern for representing a relatively large transmittance in a pseudo manner, and FIG. 11b1 is a pattern for representing a relatively small transmittance in a pseudo manner. Here, as shown in the figure, these patterns are patterns in which figures (lines in the figure) are repeatedly arranged at intervals, and nothing is drawn in a portion where no figure is arranged. Moreover, the pattern for expressing the larger transmittance in a pseudo manner has a smaller density of figures constituting the pattern.

  Even when such a pattern is used, the case of using the pattern of FIG. 11a1 as the pattern of the area graphic 500 in FIG. 11a2 and the case of using the pattern of the area graphic 500 using the pattern of FIG. 11b1 in FIG. As shown, the translucency of each transmittance of the area graphic 500 can be expressed in a pseudo manner.

  DESCRIPTION OF SYMBOLS 1 ... Navigation apparatus, 2 ... Operation part, 3 ... Display apparatus, 4 ... Vehicle state sensor, 5 ... GPS receiver, 6 ... Information receiver, 11 ... Memory | storage device, 12 ... Current state calculation part, 13 ... GUI control part , 14 ... Route search unit, 15 ... Memory, 16 ... Control unit, 17 ... Navigation image generation unit, 200 ... Navigation image, 201 ... Map image, 202 ... Current position mark, 203 ... Guide route figure, 500 ... Area figure.

Claims (13)

A map display device for displaying a map,
An information receiving unit for receiving area information representing an area having a specific attribute;
A display device;
A map display unit that selectively displays a map of any one of a plurality of different scale maps on the display device;
An area display unit that displays an area graphic representing an area represented by the area information received by the information receiving unit on a map displayed on the display device by the map display unit;
The area display unit sets the transmittance of the area graphic so that the larger the scale is, the greater the scale of the map displayed on the display device by the map display unit. The map display device, wherein the area graphic is displayed at a rate on a map displayed on the display device by the map display unit. A map display device for displaying a map,
An information receiving unit for receiving area information representing an area having a specific attribute;
A display device;
A current position calculator for calculating the current position;
A map display unit for displaying a map on the display device;
An area display unit that displays an area graphic representing an area represented by the area information received by the information receiving unit on a map displayed on the display device by the map display unit;
The area display unit sets the transmittance of the area graphic to the distance between the display position of the area graphic on the map and the position corresponding to the current position calculated by the current position calculation unit on the map. Accordingly, the map is set to be larger as the distance is smaller, and the area graphic is displayed on the map displayed on the display device by the map display unit with the set transmittance. Display device. A map display device for displaying a map,
An information receiving unit for receiving area information representing an area having a specific attribute;
A display device;
A current position calculator for calculating the current position;
A map display unit for displaying a map on the display device;
An area display unit that displays an area graphic representing an area represented by the area information received by the information receiving unit on a map displayed on the display device by the map display unit;
The area display unit corresponds to the transmittance of each part of the area graphic corresponding to the display position of the part of the area graphic on the map and the current position calculated by the current position calculation unit on the map. In accordance with the distance to the position to be performed, the map is set such that the smaller the distance is, the larger the portion of the area graphic is set to the part. A map display device characterized by displaying on a map displayed on the screen. A map display device for displaying a map,
An information receiving unit for receiving area information representing an area having a specific attribute;
A display device;
A map display unit for selectively displaying a map of any one of a plurality of designs having different contrasts on the display device;
An area display unit that displays an area graphic representing an area represented by the area information received by the information receiving unit on a map displayed on the display device by the map display unit;
The area display unit is set according to the design of the map displayed on the display device by the map display unit, and is different for each design. An area graphic is displayed on a map displayed on the display device by the map display unit. The map display device according to claim 1,
It has a current position calculation unit that calculates the current position,
The area display unit shows the transmittance of the area graphic, the scale of the map displayed on the display device by the map display unit, the display position of the area graphic on the map, and the current on the map. According to the distance from the position corresponding to the current position calculated by the position calculation unit, the map display device is set to be larger as the scale is larger and larger as the distance is smaller. . The map display device according to claim 1,
It has a current position calculation unit that calculates the current position,
The area display unit, the transmittance of each part of the area graphic, the scale of the map displayed on the display device by the map display unit, the display position of the part of the area graphic on the map, According to the distance from the position corresponding to the current position calculated by the current position calculation unit on the map, the larger the scale is set, the larger the scale is, and the smaller the distance is set to be larger. A featured map display device. The map display device according to claim 1, 2, or 5,
The map display unit selectively displays a map of any one of a plurality of designs with different contrasts on the display device,
The area display unit sets a different transmittance for each design, which is determined according to the design of the map displayed on the display device by the map display unit, as the transmittance of the area graphic. Map display device. The map display device according to claim 1, 2, 4, 5 or 7,
Instead of displaying the area graphic with the set transmittance, the area display unit displays the set transmittance of the area graphic in a form that is simulated by a pattern pattern of the area graphic. A map display device characterized by: The map display device according to claim 1 or 4,
A current position calculator for calculating the current position;
A map display device, comprising: a current position display unit that displays a mark representing the current position calculated by the current position calculation unit on a map displayed on the display device by the map display unit. The map display device according to claim 2, 3, 5 or 6,
A map display device, comprising: a current position display unit that displays a mark representing the current position calculated by the current position calculation unit on a map displayed on the display device by the map display unit. A map display device according to claim 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10,
The map display device, wherein the area having the specific attribute represented by the area information is an area where the specific weather condition is occurring. A map display device according to claim 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10,
The map display device, wherein the area having the specific attribute represented by the area information is an area where specific traffic regulation is implemented. A computer program that is read and executed by a computer,
The computer,
13. A computer program for causing a function as the map display device according to claim 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 or 12.