JP2003269972A - Map display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make surely recognizable a display for distinguishing facilities, in a case where a building and the like is three-dimensionally displayed. <P>SOLUTION: A facility mark display part 15 is drawn on the rooftop of a building where, for example, a convenience store exists as a shop in a state of three-dimensionally displaying the building. As the facility mark display part 15 draws the convenience store mark 'C' on an outer face of a cubic member, it can be displayed as if a cubic signboard is installed on the rooftop of the building 14. Accordingly, the user can recognize that the convenience store exists in the building by the facility mark display part 15. <P>COPYRIGHT: (C)2003,JPO

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 for three-dimensionally displaying a building or the like on a screen.

[0002]

2. Description of the Related Art For example, in a car navigation system, in order to display a facility such as a convenience store located in the vicinity where the vehicle is currently running, a facility mark is drawn on a plane-drawn map so that the user can see the current position and facility position. It has been done to make it easier to figure out. Further, by drawing a map three-dimensionally to bring the actual landscape and the display form of the screen close to each other, the current position and the facility position are grasped more accurately.

[0003]

However, in a car navigation system having a three-dimensional display function as a display image, for example, when the three-dimensional display is selected and the facility exists in the building, the facility mark is associated with the facility mark. Even if it is displayed at the position, the facility mark cannot be recognized because the facility mark is hidden in the three-dimensional display of the building. Further, when the facility is located on the back side of the building, the facility mark is hidden behind the building and cannot be recognized. Therefore, depending on the relationship between the facility and the building, the user may not be able to recognize the facility, which is disadvantageous in that it is inconvenient to use.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a map display device capable of surely recognizing a display for identifying a facility when a building or the like is three-dimensionally displayed. To do.

[0005]

According to the invention of claim 1, the display control means, when the map screen is three-dimensionally displayed,
When the facility identification display unit for identifying the facility is hidden in the building, the facility identification display unit is displayed in a visible form, so that the user can recognize the facility position without being disturbed by the building. .

According to the second aspect of the present invention, in the case where the facility identification display section is hidden in the building because the facility is in the building, the display control means associates the facility identification display section with the building. It is displayed in a visible position in a closed form. As a result, the user can recognize the facility position by the facility identification display unit without being disturbed by the building.

According to the third aspect of the present invention, when the viewpoint of the screen display is changed, the display control means displays the facility identification display unit in a visible form regardless of the change of the viewpoint of the screen display. Thereby, the user can surely recognize the facility position regardless of the viewpoint of the screen display.

According to the invention of claim 4, the display control means displays the facility identification display section three-dimensionally.
Even if the viewpoint of the screen display is changed, the facility position can be surely recognized.

According to the invention of claim 5, since the display control means displays the facility identification display portion at the rooftop position of the building,
The user can surely associate the facility identification display unit with the building.

According to the sixth aspect of the present invention, the display control means displays the facility identification display portion in the form of being supported by the pillars. Therefore, even when the building is located in front of the facility, the user can Can reliably recognize the location of the facility.

According to the invention of claim 7, when the facility identification display portion overlaps with another facility identification display portion, the display control means shifts and displays the facility identification display portion at a visible position. The user can simultaneously recognize a plurality of facility positions.

According to the invention of claim 8, when the facility identification display portion is displayed in a shifted manner, the facility identification display portion is displayed on the wall surface of the building, so that the building identification display portion can be surely associated with the building.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) A first embodiment in which the present invention is applied to a car navigation system will be described below with reference to FIGS.

FIG. 2 schematically shows the overall structure.
In FIG. 2, the position detection unit 1 uses a GPS (Glob
The Al Positioning System) sensor, a gyro sensor, a vehicle speed sensor, and the like are components that calculate the current position. The position detecting unit 1 is configured to be used while interpolating each sensor because each sensor has an error of a different property, but if the current position can be calculated, it is not necessary to include all of these sensors. , Any one or more is required.

Map data storage unit (corresponding to storage means) 2
Is a device for inputting various data including so-called map matching data for improving the accuracy of position detection, map data and target data, and is composed of a DVD player, a hard disk device, a CD player and the like.

The switch information input section 3 is switches attached to the left, right, top and bottom of the display device. The memory unit (ROM, RAM) 4 is a unit that temporarily stores a navigation program, a work memory of the program, map data acquired from the map data storage unit 2, and the like.

The display unit 5 displays a map, a destination selection screen, etc. for navigation. On the screen, the current position mark of the vehicle input from the position detection unit 1 and the map data storage unit 2 are input. The displayed map data and additional data such as a guide route and a mark of a set point to be displayed on the map are displayed in an overlapping manner. The voice output unit 6 utters voices for guidance and explanations of screen operations.

A control unit (corresponding to display control means) 7 automatically selects an optimum route from the current position to the destination in response to an operation on the switch information input unit 3 to form and display a guide route. It performs a route guidance function, a map matching process, a guidance voice calculation, a map drawing, and the like. The Dijkstra method is known as a method of automatically setting an optimum route in this way. The control unit 7 includes a map data acquisition unit 8, a map matching unit 9,
It is composed of a route calculation unit 10, a route guidance unit 11, a drawing unit 12, and a screen control management unit 13.

The map matching unit 9 uses the position information detected by the position detection unit 1 and the road shape data of the map data acquired from the map data storage unit 2 to determine which road the current position is on. Identify. At this time, the map data acquisition unit 8 acquires necessary map data from the map data storage unit 2. In addition, the user uses the switch information input unit 3 to perform an operation such as displaying a desired map, and sets the destination. In the route calculation unit 10, the map matching unit 9
Information on the current position calculated in step S3 and the route to the destination and the destination specified by the user are calculated.

In the route guidance section 11, the result of the above route calculation and the road shape data stored in the map data,
From the position information of the intersection, the position information of the crossing, etc., the points required for guidance are calculated, and what kind of guidance (whether turning right or turning left, etc.) is calculated.

The drawing unit 12 draws a map of the current position, a schematic view of a highway, an enlarged view near the intersection, etc., according to the instruction of the screen control management unit 13, and displays them on the display unit 5. The map data acquisition unit 8 acquires the map data necessary for each processing unit from the map data storage unit 2 and provides it to each processing unit. Further, the processing described above is performed by the R of the memory unit 4.
It is executed using OM and RAM.

The map drawn by the drawing unit 12 is a three-dimensional map, and the building is three-dimensionally represented from the shape data and height information of the building stored in the map data. Based on the information calculated by the route guidance unit 11, when the vehicle advances and reaches a position to be guided, a desired image is drawn on the drawing unit 12,
A predetermined voice is generated in the voice output unit 6 to guide the user to the destination.

Next, the operation of the above configuration will be described.

FIG. 3 shows only the operation of the characteristic portion related to the present invention among the operations of the control section 7. In FIG. 3, the control unit 7 monitors whether a facility has been selected (S101).

Here, FIG. 4 shows an example in which the map screen is three-dimensionally displayed on the display unit 5. This FIG. 4 displays the map screen when the vehicle is stopped.

When the user wants to search for a facility of any type on the map screen shown in FIG. 4, he or she operates the switch information input section 3 to specify the type of facility.

Then, when the facility to be displayed is selected (S101: YES in FIG. 3), the control unit 7 reads the coordinates of the facility, the type, the name, and the building data I from the map data storage unit 2.
D and the like are acquired (S102). In this case, the facility can be selected from a convenience store, a gas station, fast food, a family restaurant, a restaurant, a dealer, a hospital, a bank, a supermarket, a department store, a parking lot, a car supply store, a hotel and the like.

By the way, in a densely populated building, it is general that any of the above facilities is located as a store in the building. The building will be drawn at approximately the same position. However, in this case, the facility mark is buried in the building, and the facility mark cannot be displayed.

Therefore, the control unit 7 collects the facilities selected by the switch information input unit 3 (S103), acquires the height information of the corresponding building (S104), and raises the height by that height. The facility mark is displayed three-dimensionally (S10)
5). As a result, the facility mark is displayed as if it were a signboard installed on the rooftop of the building, so compared to the case where the facility mark is flatly displayed at a position off the building or in front of the building, It is possible to recognize the building in which the facility resides without fail, since the correspondence relationship with

In this case, when the facility mark is displayed three-dimensionally, for example, when the facility mark is three-dimensionally displayed like a flat signboard, the viewpoint of the screen display (hereinafter, virtual viewpoint) is changed and the facility mark is viewed from the side. If you look at it, you will not be able to recognize the facility mark. Based on this, instead of displaying the facility mark in a flat plate shape, the facility mark is drawn on the cubic outer surface (all six surfaces in the present embodiment) (hereinafter, the facility mark is drawn on the wall surface. The cube part is called the facility mark display part). And the control unit 7
Displays all the facility mark display units selected as described above on the roof of the corresponding facility.

Specifically, when displaying a mark of a convenience store, for example, as a facility mark display unit, as shown in FIG. 5, it is stored as two-dimensional data in the map data storage unit 2 in correspondence with the convenience store. The basic bitmap image data is read, and the three-dimensional coordinate conversion is performed corresponding to the facility mark polygon, and the one-side length of the three-dimensional coordinate-converted bitmap image is calculated so as to match the one-side length of the facility mark polygon. After that, it is attached to each side of the facility mark polygon. In this case, when the size of the surface of the facility mark polygon is larger than the size of the bitmap image obtained by the three-dimensional coordinate conversion, the bitmap image is enlarged and pasted, and the size of 1 dot increases.

When the convenience store is selected as the facility by the above operation, the building 1 in which the convenience store is resident as shown in FIG. 1 is selected.
Convenience store mark "C" on the roof of No. 4
Is drawn on the outside of the facility mark display unit 15,
Since it can be displayed as if a cubic signboard is installed on the roof of the building 14, the user can select the building 14 based on the display of the convenience store mark "C".
It is possible to recognize that the convenience store is in the store.

In this case, since the facility mark display section 15 is displayed larger as the distance from the virtual viewpoint becomes shorter, the approximate distance to the facility can be intuitively grasped by the size of the facility mark display section 15. can do.

The wall surface of the facility mark display section 15 (6
Convenience store facility mark "C" on all sides
Since it is drawn, even if the virtual viewpoint is changed by moving the screen, since the wall surface of any of the facility mark display portions 15 can be visually recognized, the user can store the convenience store mark as shown in FIG. The "C" can be recognized from any viewpoint direction (the left and right sides of the screen in FIG. 1, the back side, etc.).

On the other hand, when the convenience store is a one-storey store, the building data corresponding to the facility does not exist or the height data does not exist in the building. Moreover, when one of the facility data and the building data is changed due to a version upgrade or the like, the facility data and the building data may not correspond to each other.

Therefore, in such a case, the facility mark display section 15 is lifted by a certain height to draw. In this case, as shown in FIG. 7, the facility mark display portion 15 is lifted by the support 16 to draw. Therefore, the user can specify the position of the facility based on the position of the column 16 that supports the facility mark display unit 15.

According to the present embodiment as described above, the building 1
When the facility is located as a store in 4, the facility mark display portion 15 indicating the facility mark is displayed on the roof of the building 14 as if it were a three-dimensional signboard. The building 14 in which the facility resides can be identified based on the position of the facility mark. Further, even if the viewpoint of the three-dimensional map display is changed variously, the existence of the facility can be surely grasped.

Further, when there is no building data corresponding to the facility, the facility mark display portion 15 is displayed in a form supported by the support column 16, so that the user can surely recognize the position of the facility. it can.

(Second Embodiment) Next, the second embodiment of the present invention will be described.
The embodiment will be described with reference to FIGS. 8 and 9.

The second embodiment is characterized in that when the facility mark display section 15 is overlaid and displayed, the facility mark display section 15 is shifted and displayed.

FIG. 8 schematically shows a characteristic part of the operation of the control section 7, and the same steps as those in the first embodiment are designated by the same step numbers and the description thereof will be omitted. In FIG. 8, the control unit 7 collects the facility mark data selected by the user (S103) and then sorts the facility mark display unit by the distance from the front by converting it into drawing coordinates (S201). ), It is determined whether the facility mark display portions overlap (S202). At this time, when an overlap occurs (S202: overlap), a shift process is performed on the facility mark display unit (S203), and then a drawing process is executed (S204).

FIG. 9 shows an example of a three-dimensional display of the map screen which has been shifted as described above. In FIG. 9, for example, when the buildings where the convenience stores are located are adjacent to each other at substantially the same height, when the facility mark display unit 15 is drawn on the roof of the building 14, depending on the position of the virtual viewpoint, Although the facility mark display units 15 overlap with each other, the control unit 7, as a result of the shift processing as described above, replaces the facility mark display unit 15 located in front with the facility mark as the building 1 as shown in FIG.
Draw on the wall of 4. In this case, the building 1 located in front
Facility marks will be displayed on all 4 walls.

Therefore, the user is the building 1 located in the back.
While recognizing the facility mark display section 15 displayed on the rooftop of 4, the facility mark displayed on the wall of the building 14 located in the foreground confirms that the convenience store is located in each of the two adjacent buildings. can do. When the display of the facility mark display section 15 is eliminated due to the movement of the viewpoint on the display screen, the display state shown in FIG. 1 is restored.

According to such an embodiment, when the facility mark display portion 15 is overlapped when it is drawn, the facility mark is drawn on the wall surface of the building 14 located in front of the user. Can reliably recognize the location of the facility.

In this case, since the facility mark is drawn on all the walls of the building 14 in the foreground, even if the position of the virtual viewpoint is changed, it is displayed on any of the walls of the building 14 in the foreground. It is possible to confirm the facility mark that is present, and to reliably recognize the facility position.

(Third Embodiment) Next, a third embodiment of the present invention will be described with reference to FIG.

The third embodiment is characterized in that when the facility mark display portions are displayed in an overlapping manner, the facility mark display portions are shifted from each other and displayed.

FIG. 10 shows an example of a map screen when the shifting process is performed by the control unit 7. In FIG. 10, the control unit 7 shifts the display positions of the facility mark display units 15 in opposite directions when the facility mark display units 15 drawn on the roofs of the adjacent buildings 14 overlap each other. The overlapping display of the facility mark display unit 15 is prevented.

According to the third embodiment as described above, when the facility mark display portions 15 overlap each other when they are drawn, the positions of the facility mark display portions 15 are shifted in opposite directions. It is possible to effectively prevent overlapping display of the facility mark display section 15 with simple display control.

(Fourth Embodiment) Next, a fourth embodiment of the present invention will be described with reference to FIG.

The fourth embodiment is characterized in that when the facility mark display portion is displayed in an overlapping manner, the facility mark display portion located at the back is displayed at a position off the rooftop. .

FIG. 11 shows an example of a map screen when the shifting process is performed by the control unit 7. In FIG. 11, when the facility mark display units 15 drawn on the roofs of the adjacent buildings 14 overlap each other, the control unit 7
The facility mark display unit 15 located at the back is displayed on the wall surface of the building 14.

Therefore, since it is displayed as if a three-dimensional signboard is installed on the wall surface of the building 14 in the back, the user can surely recognize the facility mark display portion 15 located in the back. it can.

According to the fourth embodiment, when the facility mark display portions 15 overlap each other when the facility mark display portions 15 are drawn, the facility mark display portions 15 located in the back are shifted and displayed on the wall surface of the building 14. As a result, the overlapping display of the facility mark display section 15 can be effectively prevented.

In this case, since the facility mark display section 15 located in the back is shifted and displayed on the wall surface of the building 14, the facility mark display section 15 located in the front is displayed.
It is possible to prevent the display of the building 14 at the back from being hidden by the facility mark display unit 15 as compared with the case where the display is shifted to the wall surface of the.

(Fifth Embodiment) Next, a fifth embodiment of the present invention will be described with reference to FIG. The fifth embodiment is characterized in that the facility mark display section 15 is displayed corresponding to the location of the facility when the facility mark display section 15 is displayed in an overlapping manner.

FIG. 12 shows an example of a map screen when the shift processing by the display unit 5 is performed. In FIG. 12, when the facility mark display units 15 drawn on the roofs of the adjacent buildings 14 overlap each other, the control unit 7
The facility mark display unit 15 is drawn corresponding to the floor where the convenience store is located in the front building 14, and the facility mark display unit 15 is highlighted.

According to the fifth embodiment, when the facility mark display portions 15 overlap each other when they are drawn, the facility mark display portion 15 in front of the facility mark display portion 15 is located on the floor where the facility is located in the building 14. In addition to the drawing corresponding to, the facility mark display section 15 is highlighted.
It is possible to more accurately specify the facility position in the building 14 while avoiding the overlapping display of the facility mark display unit 15. In this case, the facility mark display unit 15 can be recognized without being disturbed by the building, as compared with the configuration in which the facility mark display unit 15 is highlighted on the building in the back.

The present invention is not limited to the above embodiments, but can be modified or expanded as follows. The facility mark may be highlighted by rotating the facility mark display unit 15.

Further, the facility mark display section 15 may have a polyhedral shape or a spherical shape. The facility mark in this case is appropriately displayed on the facility mark display portion so as to be visible.

The floor where the facility is located may be additionally displayed on the facility mark display section 15. Furthermore, the facility mark display unit 15 may be rotated and displayed so that the facility mark is located in front of the facility mark when the position of the virtual viewpoint is changed.

[Brief description of drawings]

FIG. 1 is a diagram showing a three-dimensional display according to a first embodiment of the present invention.

FIG. 2 is a block diagram schematically showing the overall configuration.

FIG. 3 is a flowchart showing the operation of the control unit.

FIG. 4 is a diagram showing a three-dimensional display before selecting a facility.

FIG. 5 is a diagram for explaining attachment of basic bitmap image data to facility mark polygons.

FIG. 6 is a diagram showing a display example of a facility mark display section when a virtual viewpoint is changed.

FIG. 7 is a view corresponding to FIG. 1 in a different display form.

FIG. 8 is a view corresponding to FIG. 3 showing a second embodiment of the present invention.

FIG. 9 is a view equivalent to FIG.

FIG. 10 is a diagram corresponding to FIG. 1 showing a third embodiment of the present invention.

FIG. 11 is a view corresponding to FIG. 1 showing a fourth embodiment of the present invention.

FIG. 12 is a view corresponding to FIG. 1 showing a fifth embodiment of the present invention.

[Explanation of symbols]

2 is a map data storage unit (corresponding to storage means), 7 is a control unit (display control means), 14 is a building Reference numeral 15 is a facility mark display section (facility identification display section).

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Junichi Ando             1-1, Showa-cho, Kariya city, Aichi stock market             Inside the company DENSO F term (reference) 2C032 HB03 HB22 HC08 HC23 HC31                       HD03 HD21 HD30                 2F029 AA02 AB01 AB07 AB13 AC03                       AC09 AC18                 5B050 AA10 BA09 BA17 BA20 EA19                       EA27 EA29                 5H180 AA01 BB13 CC12 FF04 FF05                       FF23 FF25 FF27 FF33

Claims (10)

[Claims] 1. In a map display device for three-dimensionally displaying a building or the like on a screen, when a facility identification display section for identifying a facility is hidden in the building, the facility identification display section is displayed in a visible form. A map display device comprising display control means. 2. The display control means, when the facility is in a building, visibly displays the facility identification display section in a form associated with the building. Map display device. 3. The map display device according to claim 1, wherein the display control unit displays the facility identification display unit in a form that can be visually recognized regardless of a change in the viewpoint of the screen display. 4. The map display device according to claim 3, wherein the display control unit displays the facility identification display unit in a three-dimensional shape. 5. The map display device according to claim 2, wherein the display control unit displays the facility identification display unit at a rooftop position of a building in which a facility resides. 6. The map display device according to claim 1, wherein the display control unit displays the facility identification display unit in a form of being supported by a column. 7. The display control means shifts and displays the facility identification display unit to a visible position when the facility identification display unit is displayed overlapping with another facility identification display unit. The map display device according to any one of claims 1 to 6. 8. The map display device according to claim 7, wherein the display control means displays the facility identification display section on the wall surface of the building when the facility identification display section is displayed in a shifted manner. 9. The map display device according to claim 1, wherein the facility identification display unit is a name of a building. 10. The map display device according to claim 1, wherein the facility identification display unit is a mark indicating a type of store.