JP5060856B2 - Navigation system and navigation method - Google Patents

Description

  The present invention relates to a navigation system having a display function for guiding a recommended route from a departure place to a destination.

  In the navigation system provided in mobile phones and car navigation systems, a bird's-eye view (overhead view) that expresses features such as buildings and roads obliquely from above when guiding the route from the departure point to the destination (recommended route) A map display is known (see JP 2005-017052 A, FIG. 6, FIG. 7, etc.).

  In addition, according to the bird's-eye view display, when the bird's-eye view is displayed so that the current position is in front of the screen and the destination is at the back of the screen so that the user can look down from above the current position toward the destination, the recommended route is hidden behind the building. It is also suggested to display the bird's eye view so that the destination is in front of the screen and the current position is in the back of the screen so that the recommended route can be seen in front of the building. (See JP 2004-233333 A, FIG. 2 and the like).

  In addition, if the current position on the recommended route is hidden behind the building while displaying the bird's-eye view, the bird's-eye view display is stopped and the plan map or plane bird's-eye view (a diagram in which three-dimensional buildings are omitted from the bird's-eye view) is displayed. It has also been proposed to make it easier to visually recognize the recommended route and the current position by switching display (see JP 2006-317503 A, FIG. 2, etc.).

JP 2005-017052 A JP 2004-233333 A JP 2006-317503 A

  By the way, although the invention currently disclosed by the patent documents 1-3 mentioned above was made to obtain a sense of reality by a bird's-eye view etc., making it easy to visually recognize a bird's-eye view etc. (making it easy to see visually). Since it was made as the main purpose, it could not be said that the original information of the map was displayed in an easy-to-understand manner for the user.

  For example, in the invention of Patent Document 2 (Japanese Patent Application Laid-Open No. 2004-233333), as described in FIG. 2 of the same publication, the line-of-sight direction is changed and the recommended road and the current position are displayed on the front side of the screen. However, by displaying a three-dimensional building on the back side of the screen, it is easy to see the recommended road and the current position, but the direction of the bird's eye view (the direction of east, west, south, and north) also changes with the change of the line of sight Therefore, it is difficult for the user to grasp the sense of direction, and there is a problem that the user feels uncomfortable or easily mistakes.

  In addition, as in the inventions disclosed in Patent Documents 1 to 3, the primary purpose of making map information easy to understand can be sufficiently achieved simply by displaying a bird's-eye view that is easy to see. For example, it is not easy to understand for a user who is not good at reading a map or a user who does not have a sense of direction.

  The present invention has been made in view of such problems of the prior art. For example, it is recommended from a starting point to a destination so that it is easy to understand for a user who is not good at reading a map or a user who is not familiar with direction. An object of the present invention is to provide a navigation system for displaying and guiding a route on a map.

The invention according to claim 1 is a navigation system having a display function for guiding a recommended route from the departure place to the destination, detecting the direction of the destination from the departure place, and at a predetermined position in the direction. Expressing a recommended route from the departure point to the destination in a state where the destination is fixed and looking down from above the departure point along the direction from above the departure point toward the destination, and map data , The bird's-eye view data creating unit for creating the bird's-eye view data expressing the starting point in front of the screen and the destination located on the back side of the screen, and the bird's-eye view based on the bird's-eye view data on the screen are displayed. and a display unit, the bird's-eye view data creating unit, when the current position is moved, without changing the look down view point, magnification adjustment according to the bird's-eye view data on the current position The range-specific bird's-eye view data is created, the display unit displays a bird's-eye view based on the range-specific bird's-eye view data, and the bird's-eye view data creation unit displays the direction from the departure point to the destination when creating the bird's-eye view data. Created by aligning along the vertical direction of the center of the screen of the display unit, the bird's-eye view data creation unit creates mark data indicating the current position on the recommended route, the display unit and the mark data Based on the bird's-eye view data, the current position is marked with the bird's-eye view, and the bird's-eye view data creation unit creates the mark data as pseudo mark data that moves along the recommended route, and the pseudo mark data Demonstration that displays the current location mark that moves along the recommended route by combining the bird's-eye view data and supplying it to the display unit. Performing the down display, characterized by.

The invention according to claim 6 is a navigation method having a display function for guiding a recommended route from the departure place to the destination, detecting the direction of the destination from the departure place, and at a predetermined position in the direction. Expressing a recommended route from the departure point to the destination in a state where the destination is fixed and looking down from above the departure point along the direction from above the departure point toward the destination, and map data , The bird's-eye view data creating step for creating the bird's-eye view data expressing the starting point in front of the screen and the destination located at the back of the screen, and the bird's-eye view based on the bird's-eye view data on the screen are displayed. A bird's eye view data creation step, wherein when the current position moves, the bird's eye view data creation step adjusts the bird's eye view data according to the current position without changing the look-down viewpoint position. The range-specific bird's-eye view data is created, the display step displays a bird's-eye view based on the range-specific bird's-eye view data, and the bird's-eye view data creation step determines the direction from the departure point to the destination when creating the bird's-eye view data. It is created by aligning along the vertical direction in the center of the screen of the display step, the bird's eye view data creation step creates mark data indicating the current position on the recommended route, and the display step includes the mark data and Based on the bird's-eye view data, the current position is marked together with the bird's-eye view, and the bird's-eye view data creation step creates the mark data as pseudo mark data that moves along the recommended route, and the pseudo mark data is By combining the bird's-eye view data and supplying it to the display step, the current location mark moving along the recommended route is displayed. Performing the demonstration display, characterized by.

  Preferred embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing the basic configuration of the navigation system of this embodiment.

  1, the navigation system 1 includes a current position detection unit 2, a navigation processing unit 3, a bird's eye view data creation unit 4, a storage unit 5, a communication unit 6, a display control unit 7, an operation unit 8, and a display unit 9. It is configured and realized by a so-called computer system configuration that operates under the control of a microprocessor (MPU) (not shown). The navigation system 1 is built in or mounted on a mobile body such as a car navigation device, a mobile phone, a microcomputer, or a PDA (Personal Digital Assistant).

  The communication unit 6 receives map data (spatiotemporal geographical information) distributed from a map information distribution center (not shown) via a communication network such as the Internet, and downloads and stores the map data in the storage unit 5. ing.

  Further, although not shown, an information reading device that reads map data stored in a recording medium such as a DVD, CD, or memory card is provided, and the read map data can be downloaded and stored in the storage unit 5. Yes.

  The storage unit 5 includes a storage medium such as a hard disk drive (HDD), SDRAM, or flash ROM in order to download and store map data (time-space geographic information) distributed from the above-described map information distribution center. ing.

  The operation unit 8 is provided with operation switches and operation keys for the user to input a desired operation command.

  The display control unit 7 generates video data based on map display data Dmap, which will be described later, created by the bird's eye view data creation unit 4, and uses the video data to display the bird's eye view on the display unit 9 including a touch panel type liquid crystal display device. Is displayed on the map.

  Furthermore, in addition to displaying a bird's eye view on the screen of the display unit 9, the display control unit 7 displays a menu in a predetermined display area, and when the user touches the menu, the display control unit 7 is equivalent to the case where the operation unit 8 is operated. An operation command can be input.

  The current position detection unit 2 detects the current position of the moving body using a built-in GPS (Global Positioning System) receiver, an autonomous navigation sensor, or the like, and outputs current position data PRS.

  The navigation processing unit 3 performs navigation processing in accordance with a predetermined command input by the user via the menu display of the operation unit 8 or the display unit 9. Although details will be described later, for example, when the user inputs and sets the latitude and longitude of the departure point S and the destination G and instructs the navigation processing to start, the navigation processing unit 3 stores the departure stored in the storage unit 5. Using map data including the route from the destination S to the destination G, processing such as map matching is performed, and the optimum recommended route from the departure point S to the destination G (with at least nodes and links as entities) Recommended route) BRD is searched for a route.

  The bird's eye view data creation unit 4 acquires map data including the departure point S and destination G input and set by the user, the recommended route BRD searched for the route by the navigation processing unit 3, and the background map from the storage unit 5, The bird's-eye view data Dcg is created using the acquired map data, and the departure point mark data Ds and the destination mark data Dg for indicating the positions of the departure point S and the destination G with marks are created. Based on the current position data PRS detected by the position detector 2, current position mark data Dprs for indicating the current position of the moving object with a mark such as a triangle mark (current position mark Mprs) is created, and the departure place mark is displayed in the bird's eye view data Dcg The data Ds, the destination mark data Dg, and the current location data Dprs are combined to create map display data Dmap, which is supplied to the display control unit 7. Then, the display control unit 7 generates video data based on the map display data Dmap, and the display unit 9 displays a bird's eye view on a map.

  Although details will be described later, the navigation system 1 of the present embodiment has two operation modes of “navigation display mode” and “demonstration display mode”. When a “navigation display mode” is instructed by the user via a menu display, which will be described later, displayed on the operation unit 8 or the display unit 9, the current position when the user actually moves is indicated by the current location mark Mprs on the display unit 9 Is displayed on the screen. That is, when the “navigation display mode” is instructed, the bird's eye view data creation unit 4 displays the current location mark Mprs by the current location mark data Dprs created based on the current location data PRS detected by the current location detection unit 2. It is supposed to let you. Therefore, in the “navigation display mode”, while displaying the recommended route BRD to the destination G, the actual current position of the user (in other words, a moving body) is presented (displayed) by the current location mark Mprs.

  On the other hand, when the “demonstration display mode” is instructed by the user, the current location mark Mprs is moved from the departure point S to the destination G along the recommended route BRD and displayed even if the user does not actually move. That is, when the “demonstration display mode” is instructed, the bird's eye view data creation unit 4 displays the current location mark Mprs by the current location mark data Dprs created based on the current location data PRS detected by the current location detection unit 2. Rather than creating the current location mark data Dprs based on the latitude route information at each point when moving pseudo along the recommended route BRD, the current location mark Mprs is displayed by the pseudo current location mark data Dprs By doing so, even if the user does not actually move, the simulated display is performed as if the user moved. Therefore, in the “demonstration display mode”, while displaying the recommended route BRD to the destination G, a video showing the current location mark Mprs automatically moving toward the destination G along the recommended route BRD is displayed. .

  Next, the operation of the navigation system 1 having such a configuration will be described in detail with reference to FIGS.

  FIG. 2 is a diagram showing a menu display or the like displayed on the screen of the display unit 9. A user can touch this menu display to input a desired command to the navigation system 1.

  First, menu display will be described. The screen of the display unit 9 is divided into a map display area, a menu display area, and a status display area, and is divided and displayed (window display).

In the map display area, a bird's eye view for guiding to the destination G by the recommended route BRD and the current location mark Mprs described above is displayed as a map.
The menu display area includes items such as “View Type”, “Direction Mode”, “Departure Point”, “Destination”, “Texture”, “Intersection Expansion”, “Transparency”, “Demo Display”, “Movement Speed”, “Draw”, “Auto” / Manual, “Demo display start”, “Pause”, “Screen shot” and “End” are displayed. The operation unit 8 manages these items and icons, and commands the operation of the navigation system 1 in accordance with information input and set by the user.

  In the item “view type”, an input box for inputting and setting a map display format such as a rear view, a satellite view, an arrow view, and a guide view is displayed. Each time the user touches the input box, the map display format is switched, and a desired map display format can be input. For example, when the user selects a default rear view (standard setting), a three-dimensional bird's-eye view of the user looking down on the scenery from behind the overhead can be displayed as a map.

  In the “azimuth mode” item, an input box for inputting and setting one of the standard azimuth mode and the fixed azimuth mode is displayed. The standard azimuth mode is the default, and the input box for the azimuth mode item can be switched to a desired mode every time the user touches.

  The “standard direction mode” is a mode in which only the direction (drawing direction) between the departure point S and the destination G displayed in the map display area is always fixed and the recommended route BRD to the destination G is displayed. . Here, the directions of the departure point S and the destination G are not directions determined by the latitude and longitude of the departure point S and the destination G, but the horizontal direction (lateral direction) of the map display area is the x direction and the vertical direction. The drawing direction is determined based on the drawing positions of the departure point S and the destination G in the xy coordinate system with the (vertical direction) as the y direction. For example, in the xy coordinate system of the map display area, if the drawing position of the departure point S is (xs, ys) and the drawing position of the destination G is (xg, yg), (xs, ys) and (xg, yg) ) Is the direction (drawing direction) between the departure point S and the destination G.

  “Fixed bearing mode” is a mode in which the starting point S is always positioned below the map display area and the destination G is positioned above the map display area along the y direction passing through the center position of the map display area. It is. In other words, if a vertical imaginary line that divides the map display area into left and right (equal division) is a y-coordinate axis (hereinafter referred to as a “fixed central axis”), the direction of the departure point S and the destination G (the drawing direction) is Display in line with the fixed central axis.

  As described above, in the “standard direction mode”, only the direction (drawing direction) between the departure point S and the destination G displayed in the map display area is always fixed and displayed. The drawing position of the ground G is appropriately moved and displayed within the map display area. In the “fixed orientation mode”, since the direction (drawing direction) between the departure point S and the destination G always coincides with the y direction passing through the center position of the map display area, it is fixed to the left and right middle in the map display area. Is displayed.

  In the item of “departure place”, an input box for inputting the latitude and longitude of the departure place S is displayed. After touching the input box, the number keys provided on the operation unit 8 are operated, The latitude and longitude of the departure place S are input as data.

  In the “Destination” item, an input box for inputting the latitude and longitude of the destination G is displayed. After touching the input box, the number keys provided on the operation unit 8 are operated, The latitude and longitude of the destination G are input as data.

  The “drawing icon” is provided for displaying a bird's eye view including the recommended route BRD. When the user touches the drawing icon after inputting the latitude and longitude of the departure point S and the destination G, the navigation processing unit 3 performs the navigation processing shown in FIG. 2 to obtain the bird's eye view data Dcg and the map display data Dmap. The bird's-eye view is displayed in the map display area by creating and supplying the display unit 9 via the display control unit 7.

  In the “texture” item, a check box is displayed, and each time the user touches the check box, check-on and check-off can be switched. When the check-on is performed as shown in the figure, the texture-on can be set for the house shape displayed on the map, and the texture-off is the initial value.

  A check box is displayed in the item “intersection enlargement”, and the user can switch between check-on and check-off each time the user touches the check box. When the check is turned on as shown in the figure, when the current location mark Mprs approaches the intersection on the recommended route BRD in the above-described map display in the “navigation display mode” or the “demonstration display mode”, the area around the intersection is displayed. The enlarged map is displayed in a predetermined area of the map display area so as to overlap the bird's eye view. If it is checked off, it can be set not to display enlarged images.

  In the “Transmittance” item, a slide volume image is displayed. When the user touches the knob of the slide volume and moves it, the transmittance of the building in the bird's eye view is set according to the moved position. Can be done. That is, when the bird's-eye view data creation unit 4 creates the bird's-eye view data Dcg, the bird's-eye view data Dcg for adjusting the transparency of the building or the like so that the recommended route BRD can be seen through is created.

  In the “Demo display” item, a switch with ON / OFF notation is displayed. The present location mark Mprs displayed in the bird's-eye view is moved and displayed along the recommended route BRD from the departure point S to the destination G, and is provided for demonstration display as if the user actually moved. When the user touches the notation of “ON”, the “demonstration display mode” is turned on, and when the user touches the notation of “OFF”, the “demonstration display mode” is turned off and can be initially set to the “navigation display mode”.

  The “demonstration display activation icon” functions when the item of the demonstration display is initially set to ON, and the demonstration display is started when the user touches the demonstration display activation icon to perform an on operation.

  The “pause icon” functions when the demo display item is initially set to ON. Then, after the user touches the demonstration display start icon and turns it on, if the current location mark Mprs displayed in the bird's eye view moves along the recommended route BRD, touching the pause icon causes the current location mark Mprs to move. It can be paused. Note that the movement of the current location mark Mprs can be temporarily stopped by causing the bird's eye view data creation unit 4 to temporarily stop the change of the movement position. Further, when the user touches the temporary stop icon in the temporary stop state, it is possible to instruct the bird's eye view data creation unit 4 to move the current location mark Mprs again from the stop position.

  The “moving speed” item displays a slide volume image. When the user touches and moves the slide volume knob, the bird's eye view data creation unit 4 is instructed to move the slide volume knob to the moving position. Accordingly, the moving speed of the current location mark Mprs displayed in the demonstration can be adjusted. Note that the slide volume can be set even when the current location mark Mprs is moved during the demonstration display or in a state of being paused.

  The “screen shot icon” is provided to save the bird's eye view displayed in the map display area as still image data. When the user touches the screen shot icon, the screen shot is turned on (capture is turned on), and the display control unit 7 saves the bird's eye view at the moment of the on operation as a still image data in a predetermined folder in the storage unit 5. When the current location mark Mprs is moving, when the user saves still image data at a desired timing and turns on the still image playback button provided in the operation unit 8, the display control unit 7 displays the still image. It is displayed in the map display area and presented to the user.

  The “end icon” is provided to end the demonstration display. When the current location mark Mprs is moving in the bird's-eye view, when the user touches the end icon, the processing for instructing the bird's-eye view data creation unit 4 to move the current location mark Mprs is terminated, and the current location mark Mprs is returned to the departure place S. It can be made to stand still.

  Next, in the state display area shown in the figure, the distance from the departure point S to the destination G is set to 100%, and the distance moved from the departure point S of the current location mark Mprs is displayed as a percentage, thereby moving the current location mark Mprs. A ruler that displays is displayed. When the user observes the movement of the ruler during the start of the demonstration display, the movement speed for reaching the destination G can be predicted in advance, and when the navigation display is being performed, the user can By looking at the movement, it is possible to know the relative remaining distance until the destination G is reached.

  Next, an operation when the user operates the menu display described above and actually uses the navigation system 1 will be described with reference to the flowchart of FIG.

[Demonstration display mode / fixed orientation mode]
First, the operation when the user inputs and sets the demonstration display mode and the fixed orientation mode will be described. Note that the view type is set to the back view, the transmittance is already set to the desired transmittance, the texture is set to OFF, the desired moving speed is already set to the moving speed item, and the intersection enlargement check box is set to ON. It is assumed that

  In FIG. 3, when the user inputs and sets the latitude and longitude of the departure point S and the destination G and operates the drawing icon, the navigation processing unit 3 acquires information on the latitude and longitude and performs the work in the storage unit 5. Store in the storage area (step ST1).

  Next, in step ST2, the navigation processing unit 3 searches for the optimum recommended route BRD using the latitude and longitude information of the departure point S and destination G and the map data stored in the storage unit 5. Further, the bird's-eye view data creation unit 4 acquires map data of a predetermined scale ratio including the recommended route BRD, the departure place S, the destination G, and the background map from the storage unit 5. More specifically, more detailed (small scale) map data on condition that at least the recommended route BRD, the starting point S, and the destination G are all within the range of the map display area shown in FIG. Identify and get.

  Further, by calculating the distance DST of the recommended route BRD, dividing the distance DST by a fixed value (for example, 100), and multiplying the divided value by the value of the moving speed set in the item of moving speed, A reference movement distance ΔDST proportional to the movement speed is obtained, and the reference movement distance ΔDST is stored in the work storage area of the storage unit 5. For example, if the moving speed is set to 1, the reference moving distance ΔDST is a value of DST / 100, and if the moving speed is set to 2, the reference moving distance ΔDST is a value of 2 × DST / 100. It becomes.

  Next, in step ST3, the bird's-eye view data creation unit 4 rotates the acquired map data by a predetermined geometric technique (geometric analysis algorithm), so that the departure point S is located below the map display area. The destination G is set to the upper position of the map display area, the starting point S and the destination G are made to coincide with each other on the fixed central axis, and at least the recommended route BRD, the starting point S, and the destination G are all The range of the map data is specified so as to be within the range of the map display area.

  Next, in step ST4, the bird's eye view data creation unit 4 uses the map data within the specified range (hereinafter referred to as “range specific map data”) Dbase to determine the destination G from above the departure point S. Bird's-eye view data Dcg that makes you feel visually as if looking down is created.

  Here, the bird's eye view data creation unit 4 creates the bird's eye view data Dcg by the following processing. First, as schematically shown in the geometric diagram of FIG. 4, based on the latitude and longitude of the departure point S and the latitude and longitude of the destination G, the direction vector Vsg connecting the departure point S and the destination G on the planar map. Is calculated.

  For convenience of explanation, the azimuth vector Vsg is drawn with an inclination in FIG. 4, but in the fixed azimuth mode, the direction of the azimuth vector Vsg coincides with the fixed central axis of the map display area shown in FIG. Will do. That is, in the case of the fixed orientation mode, the bird's eye view data creation unit 4 performs the rotation process described above, thereby performing the rotation process on the latitude and longitude of the departure point S and the destination G. An orientation vector Vsg is calculated based on the latitude and longitude after the rotation processing of the ground G. For this reason, the direction of the azimuth vector Vsg coincides with the fixed central axis of the map display area shown in FIG.

  Next, the latitude and longitude of the point SB located on the extension line of the direction vector Vsg and located behind the departure point S by a predetermined distance m is estimated and calculated. Further, the position P of the predetermined height H is looked down from the point SB as the viewpoint P, and an angle (a depression angle) θ looking down the destination G from the look-down viewpoint P is calculated. Then, polygon data relating to features such as buildings included in the range specifying map data is subjected to data conversion processing according to the perspective method based on the depression angle θ, so that the departure place S is on the front side of the screen of the display unit 9. The bird's-eye view data Dcg is created so that the user can visually see the destination G at the back of the screen.

Next, when the bird's-eye view data creation unit 4 displays the bird's-eye view on the screen of the display unit 9 in step ST5, the departure point S, the destination G, and the recommended route BRD are within the range of the map display area. As shown, the magnification adjustment (zoom adjustment) is performed on the bird's eye view data Dcg. Specifically, the distance L between the destination G and the looking-down viewpoint P shown in FIG. 4 is adjusted, the magnification is adjusted (zoom adjustment) with respect to the bird's eye view data Dcg according to the adjusted distance L, and the departure place S In addition, bird's eye view data Dcg in which all of the destination G and the recommended route BRD fall within the range of about 80% from the center (middle) of the map display area is created.
Then, the bird's eye view data Dcg adjusted for magnification is stored in the work storage area of the storage unit 5.

  In this embodiment, since the magnification L (zoom adjustment) is performed on the bird's eye view data Dcg by adjusting the distance L between the destination G and the looking-down viewpoint P shown in FIG. 4, the depression angle θ is always constant. is there. However, as another magnification adjustment method, the depression angle θ is also adjusted by adjusting the distance m between the departure point S and the rear point SB shown in FIG. 4 and the height H of the looking-down viewpoint P above the point SB. Then, the magnification adjustment may be performed on the bird's eye view data Dcg so that the destination G is looked down from the adjusted look-down viewpoint P.

  Next, in step ST6, the bird's eye view data creation unit 4 creates departure point mark data Ds and destination mark data Dg for displaying the departure point S and the destination G based on the range specifying map data. Further, current location mark data Dprs for displaying the current position on the recommended route BRD as a mark is created. These mark data Ds, Dg, Dprs are stored in the working storage area of the storage unit 5. When the demonstration has not yet started, the current location mark data Dprs is created with the current location as the same location as the departure location S.

  Next, in step ST7, the bird's-eye view data creation unit 4 acquires the bird's-eye view data Dcg, the departure point mark data Ds, the destination mark data Dg, and the current location mark data Dprs stored in the work storage area of the storage unit 5. By combining the departure point mark data Ds, the destination mark data Dg and the current location mark data Dprs with the bird's eye view data Dcg, map display data Dmap is generated and supplied to the display unit 9 via the display control unit 7. A bird's-eye view for demonstration display is displayed on a map.

  FIG. 5A is a diagram illustrating a bird's-eye view for demonstration display. In the map display area of the display unit 9, a departure point mark (S) and a destination mark (G) are arranged along a fixed central axis. In addition, all the recommended route BRD is displayed and colored such as yellow so that it can be distinguished from other roads. Further, the current location mark Mprs is displayed over the recommended route BRD. Is done. Furthermore, the names of the intersections A and B and the attached information such as traffic lights are also displayed.

  Note that the bird's eye view as shown in FIG. 5A displayed in step ST7 is presented (displayed) before the start of the demonstration, and will be referred to as a standby map image in the following description.

  Next, when the user turns on the demo display activation icon, the process proceeds to step ST8, where the bird's eye view data creation unit 4 moves the current location mark Mprs along the recommended route BRD at the predetermined distance (fixed period) by the movement distance ΔDST. The current location mark data Dprs when moved is newly created. As a result, the current location mark Mprs can be moved and displayed at a speed proportional to the input and set moving speed.

  Next, in step ST9, the bird's eye view data creation unit 4 acquires the destination mark data Dg and the bird's eye view data Dcg stored in the work storage area, and based on the new current location mark data Dprs and the destination mark data Dg. Then, the magnification adjustment (zoom adjustment) described above is performed on the acquired bird's-eye view data Dcg so that the route within the range from the new current location to the destination G in the recommended route BRD is stored in the map display area.

  More specifically, the position of the destination G in the map display area is fixed, and the direction of the direction vector Vsg between the departure point S and the destination G is fixed on the fixed central axis, as shown in FIG. By adjusting the distance L between the destination G and the looking-down viewpoint P, the magnification adjustment (zoom adjustment) is performed on the acquired bird's-eye view data Dcg, and the distance from the new current position of the recommended route BRD to the destination G is adjusted. The range of the bird's eye view data Dcg adjusted for magnification is specified so that the recommended route portion within the range is within the map display area. Therefore, when the new current location moves far from the departure point S, the departure point S is not included in the bird's-eye view data Dcg (hereinafter referred to as “range-specific bird's-eye view data”) subjected to magnification adjustment and range specification. In some cases, a new current location and a destination G, and a portion of a recommended route from the new current location to the destination G are always included.

  Next, in step ST10, the bird's-eye view data creation unit 4 combines the destination mark data Dg and the new current location mark data Dprs with the above-described range-specific bird's-eye view data, and if the departure place S is not missing. The departure point mark data Ds is also synthesized and supplied to the display unit 9 via the display control unit 7, and a bird's-eye view based on the range-specific bird's-eye view data is displayed as a map.

  Next, in step ST11, the bird's eye view data creation unit 4 determines whether or not the current location mark Mprs has reached the destination G. If it has not yet reached, the process from step ST8 is repeated. When the processing is stopped while the bird's eye view where the current location mark Mprs reaches the destination G is displayed and the end icon described above is operated, the demonstration display is ended (completed), and the standby map image (FIG. ))) Display.

  FIG. 5B to FIG. 7B are diagrams illustrating bird's-eye views displayed by the processes in steps ST8 to ST11 described above. As the current location mark Mprs approaches the destination G, a bird's eye view that is gradually zoomed up is displayed, and the map display changes to a user-friendly map display. In particular, when the current location mark Mprs is close to the destination G, the periphery of the destination G is enlarged and displayed, so that a highly convenient display is achieved.

  Although not described in steps ST8 to ST11, when the current location mark Mprs approaches the intersection, the bird's eye view data creation unit 4 stores map data (map data with the smallest scale ratio) that enlarges the vicinity of the intersection. And is supplied to the display unit 9 and displayed on the bird's eye view in a predetermined area of the map display area as illustrated in FIG. 5B. Therefore, it is possible to provide effective information to the user when changing the direction to move.

  Further, as illustrated in FIGS. 5A to 7B, the bird's-eye view in which the destination G is always displayed at a fixed position in the map display area and is further zoomed in Since the direction of the destination G is always displayed in a fixed state, it can be displayed and demonstrated so as to be easily understood by a user who is not good at reading a map or a user who is not familiar with the direction.

  Then, by viewing the demonstration display by the user, it is possible to obtain preliminary knowledge for reliably reaching the destination G, and to provide excellent convenience.

[Demonstration display mode / Standard orientation mode]
Next, an operation when the user sets the standard azimuth mode and instructs a demonstration display will be described. The basic operation is the same as in the fixed orientation mode, and will be described with reference to the flowchart of FIG.

  When the standard orientation mode is set, after performing the processing of steps ST1 and ST2 shown in FIG. 3, the bird's-eye view data creation unit 4 performs a predetermined geometric technique (geometric analysis algorithm) in step ST3. By rotating the acquired map data, the starting point S is set to the lower position of the map display area, the destination G is set to the upper position of the map display area, and at least the recommended route BRD and the starting point S and The range of the map data is specified so that all the destinations G are within the range of the map display area.

  That is, in the fixed azimuth mode, the directions of the departure point S and the destination G are made to coincide with the fixed central axis. In the standard azimuth mode, at least the recommended route BRD and the departure point S are removed except for the condition that they coincide with the fixed central axis. In addition, the range of the map data is specified so that all of the destinations G are within the range of the map display area, and the map data for which the range is specified is set as the above-described range specifying map data Dbase.

  Further, the range specifying map data Dbase is used to calculate the direction of the destination G from the starting point S in the xy coordinate system of the map display area to the above-described direction vector Vsg, and the direction of the direction vector Vsg is fixed. . That is, processing equivalent to changing the fixed central axis to the direction of the direction vector Vsg (changing the direction) is performed.

  Then, the processing of steps ST4 to ST7 shown in FIG. 3 is performed. As a result, as illustrated in FIG. 8, the direction of the direction vector Vsg is automatically set in the map display area, and the starting point S and the destination G are displayed in the direction of the direction vector Vsg. In addition, the recommended route BRD and the current location mark Mprs are displayed, and the bird's eye view is displayed as a standby map image.

  Next, when the user activates the demonstration, the process proceeds to processing after step ST8 shown in FIG. 3, and in step ST9, the position of the destination G in the map display area is fixed, and the departure point S and destination G Is fixed in the direction of the azimuth vector Vsg, and the distance L between the destination G and the looking-down viewpoint P shown in FIG. 4 is adjusted, and the magnification adjustment (zoom adjustment) is performed on the bird's eye view data Dcg. The range-specific bird's-eye view data is generated by specifying the range of the bird's-eye view data Dcg whose magnification has been adjusted so that the route within the range from the new current location to the destination G in the route BRD falls within the map display area. In step ST10, the bird's-eye view data creation unit 4 synthesizes the destination mark data Dg and the new current location mark data Dprs with the range-specific bird's-eye view data, and starts the departure. When the place S is not missing, the departure point mark data Ds is also synthesized and supplied to the display unit 9 via the display control unit 7, and the bird's eye view based on the range specific bird's eye view data is displayed as a map.

  Then, in step ST11, the bird's eye view data creation unit 4 determines whether or not the current location mark Mprs has reached the destination G. If it has not reached yet, the processing from step ST8 is repeated. When the processing is stopped while the bird's eye view where the mark Mprs has reached the destination G is displayed and the end icon described above is operated, the demonstration display is ended (completed), and the standby map image (see FIG. 8). Return to the display.

  Thus, even when the standard azimuth mode is set, a bird's eye view that is gradually zoomed in as the current location mark Mprs approaches the destination G is displayed, as in the case where the fixed azimuth mode is set. Changes to easy-to-understand map display. In particular, when the current location mark Mprs is close to the destination G, the periphery of the destination G is enlarged and displayed, so that a highly convenient display is achieved.

  That is, when the standard azimuth mode is set, the bird's-eye view shown in FIGS. 5A to 7B is displayed, for example, tilted in the direction of the automatically set azimuth vector Vcg. However, basically, as in the case of the fixed orientation mode, as the current location mark Mprs approaches the destination G, a bird's eye view that is gradually zoomed up is displayed, and the map display changes to a user-friendly map display. When the current location mark Mprs is close to the destination G, the periphery of the destination G is enlarged and displayed, so that a highly convenient display is achieved.

  Then, by viewing the demonstration display by the user, it is possible to obtain preliminary knowledge for reliably reaching the destination G, and to provide excellent convenience.

(Navigation display mode)
Next, the operation when the navigation display mode is set will be described. Since basically the same processing is performed as in the case of [demonstration display mode / fixed azimuth mode] and [demonstration display mode / standard azimuth mode] described above, description will be made with reference to the flowchart of FIG.

  When the user sets the demo display item to OFF, sets the azimuth mode to the fixed azimuth mode, and inputs and sets the moving longitudes of the departure point S and the destination G, navigation display in the fixed azimuth mode is started. When the demo display item is set to OFF, the azimuth mode is set to the standard azimuth mode, and the moving longitudes of the departure point S and the destination G are input and set, navigation display in the standard azimuth mode is started.

  When navigation display in the fixed azimuth mode is started, the same processing as the [demonstration display mode / fixed azimuth mode] described above is performed in steps ST1 to ST7 shown in FIG. A standby map image similar to that illustrated is displayed, and the processes after step ST8 are automatically started.

  Then, in the processes of steps ST8 to ST11, the bird's eye view data creation unit 4 creates the current location mark data Dprs based on the current position data PRS detected by the current position detection unit 2.

  As a result, in the case of navigation display in the fixed orientation mode, the destination G is displayed fixed on the fixed central axis of the map display area, and further illustrated in FIGS. 5A to 7B. The current location mark Mprs displayed in the bird's-eye view shows the position where the mobile object has actually moved. When the moving body moves from the current location S side toward the destination G side, the current location mark Mprs is displayed in the order of FIG. 5A to FIG. 7B, and the moving body moves from the destination G side to the current location. When returning to the S side, the current location mark Mprs is displayed in the order of FIG. 7B to FIG. 5A.

  Then, as the current location mark Mprs approaches the destination G, a bird's eye view that is zoomed up gradually is displayed, and the map display changes to a map that is easy for the user to understand. In particular, when the current location mark Mprs approaches the destination G, the destination G Since the periphery of the image is enlarged and displayed, a convenient display is achieved.

  Furthermore, since the destination G is always fixed and displayed at a predetermined position in the map display area, and the bird's eye view is always displayed in the direction along the fixed central axis, the user or direction that is not good at reading the map It is possible to present a map that is easy to understand for a user who is not sensitive.

  On the other hand, when the navigation display in the standard azimuth mode is started, the same processing as the [demonstration display mode / standard azimuth mode] described above is performed in steps ST1 to ST7 shown in FIG. A standby map image similar to the above is displayed, and the processing after step ST8 is automatically started.

  Then, in the processes of steps ST8 to ST11, the bird's eye view data creation unit 4 creates the current location mark data Dprs based on the current position data PRS detected by the current position detection unit 2.

  As a result, in the case of navigation display in the standard orientation mode, the destination G is fixed and displayed in the direction of the automatically determined orientation vector Vcg, and the current location mark Mprs displayed in the bird's eye view is moved. It will indicate the actual position the body has moved. Further, when the moving body moves from the current location S side toward the destination G side, the current location mark Mprs is displayed in the zoomed-up bird's-eye view, and when moving from the destination G side toward the departure G side, the zoom is performed. The current location mark Mprs is displayed in the bird's eye view that is down. In particular, when the current location mark Mprs is close to the destination G, the periphery of the destination G is enlarged and displayed, so that a highly convenient display is achieved.

Further, the destination G is always fixed and displayed at a predetermined position in the map display area, and the bird's eye view is automatically displayed along the direction of the direction vector Vcg. Therefore, it is possible to present a map that is easy to understand for users who are not good at it and who are not familiar with the sense of direction.
In addition, the user can reach the desired destination G more reliably and easily by using the navigation display and the demonstration display in combination.

As described above, according to the navigation system 1 of the present embodiment, the following effects can be obtained.
In both the demonstration display and the navigation display, the bird's eye view is fixed and displayed in the directions of the departure point S and the destination G. Therefore, a user who is not good at reading a map or a user who is not familiar with the direction sense. The map can be displayed for easy understanding.

  Also, by displaying the demonstration, prior knowledge can be obtained before the user actually starts moving from the departure point S toward the destination G along the recommended route BRD. For this reason, it is possible to provide preliminary knowledge for reliably guiding the user to the destination G to a user who is not good at reading a map or a user who does not have a sense of direction.

  In addition, since the demonstration display can be performed even while the user is moving while performing the navigation display, the user can surely reach the destination G and cannot read the map. It is possible to reliably guide a user who is good at or not familiar with the direction sense to the destination G.

  In the present embodiment, the current position detection unit 2 is provided as shown in FIG. 1, but the current position detection unit 2 may be omitted. In other words, the navigation display function may be omitted. According to such a configuration, there is a demonstration display function, so that the user can use the demonstration display function so that, for example, the map is easy to understand for a user who is not good at reading a map or a user who is not familiar with the direction. It is possible to display and obtain prior knowledge.

  Moreover, the configuration of the navigation system 1 may be a hardware configuration, or a so-called software configuration in which the same function is exhibited by a computer program executed by a computer.

It is a block diagram which shows the structure of the navigation system which concerns on embodiment. It is description for demonstrating the menu etc. which are displayed on the screen of a display part. 3 is a flowchart for explaining the operation of the navigation system shown in FIG. 1. It is explanatory drawing for demonstrating the creation principle of bird's-eye view data. It is explanatory drawing which illustrates the bird's-eye view displayed on a display part. Furthermore, it is explanatory drawing which illustrates the bird's-eye view displayed on a display part. Furthermore, it is explanatory drawing which illustrates the bird's-eye view displayed on a display part. Furthermore, it is explanatory drawing which illustrates the bird's-eye view displayed on a display part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Navigation system 2 ... Current position detection part 4 ... Bird's eye view data preparation part 7 ... Display control part 9 ... Display part

Claims (6)

A navigation system with a display function for guiding a recommended route from a starting point to a destination,
Detecting the direction of the destination from the departure point,
Expressing a recommended route from the departure point to the destination in a state where the destination is fixed at a predetermined position in the direction and looking down from above the departure point along the direction toward the destination. And, by rotating the map data, the bird's-eye view data creating unit for creating the bird's-eye view data expressing the starting point in front of the screen and the destination located on the back side of the screen ;
A display unit for displaying a bird's eye view based on the bird's eye view data ;
With
When the current position moves, the bird's-eye view data creation unit creates range-specific bird's-eye view data obtained by adjusting the magnification of the bird's-eye view data according to the current position without changing the look-down viewpoint position, and the display unit Display a bird's-eye view based on specific bird's-eye view data,
The bird's-eye view data creation unit creates the bird's-eye view data by aligning the direction from the departure point to the destination along the vertical direction of the center of the screen of the display unit,
The bird's eye view data creation unit creates mark data indicating the current position on the recommended route,
The display unit displays a current position along with the bird's eye view based on the mark data and the bird's eye view data,
The bird's eye view data creation unit creates the mark data as pseudo mark data that moves along the recommended route, synthesizes the pseudo mark data with the bird's eye view data, and supplies it to the display unit. Performing a demonstration display for displaying a current location mark moving along the recommended route;
A navigation system characterized by The bird's-eye view data creation unit creates bird's-eye view data expressing a recommended route between the destination and the position of the current location mark by the pseudo mark data at the time of demonstration display, and based on the bird's-eye view data, the predetermined direction in the direction is created. Fixing a destination at a position and displaying a bird's eye view on the display unit;
The navigation system according to claim 1. The bird's eye view data creation unit creates the pseudo mark data for adjusting a moving speed of the current location mark according to an instruction from a user;
The navigation system according to claim 2. The bird's eye view data creation unit creates the pseudo mark data for temporarily stopping the movement of the current location mark according to an instruction from a user;
The navigation system according to claim 1 or 3, wherein A current position detecting unit for detecting a current position of a moving body including the navigation system;
The bird's-eye view data creation unit creates the mark data based on the current position detected by the current position detection unit in accordance with an instruction from the user, synthesizes the bird's-eye view data, and supplies it to the display unit. Performing a navigation display for displaying a current location mark moving along the recommended route;
The navigation system according to any one of claims 1 to 4, wherein: A navigation method with a display function to guide the recommended route from the starting point to the destination,
Detecting the direction of the destination from the departure point,
Expressing a recommended route from the departure point to the destination in a state where the destination is fixed at a predetermined position in the direction and looking down from above the departure point along the direction toward the destination. And, by rotating the map data, the bird's-eye view data creating step for creating the bird's-eye view data expressing the starting point in front of the screen and the destination located on the back side of the screen;
A display step of displaying a bird's eye view based on the bird's eye view data on a screen;
With
The bird's-eye view data creating step creates range-specific bird's-eye view data obtained by adjusting the magnification of the bird's-eye view data according to the current position without changing the look-down viewpoint position when the current position is moved; Display a bird's-eye view based on specific bird's-eye view data,
The bird's-eye view data creation step creates the bird's-eye view data by aligning the direction from the starting point to the destination along the vertical direction at the center of the screen of the display step,
The bird's-eye view data creation step creates mark data indicating the current position on the recommended route,
The display step displays a current position along with the bird's eye view based on the mark data and the bird's eye view data,
The bird's eye view data creation step creates the mark data as pseudo mark data that moves along the recommended route, combines the pseudo mark data with the bird's eye view data, and supplies it to the display step. Performing a demonstration display for displaying a current location mark moving along the recommended route;
A navigation method characterized by the above.

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