JP5060855B2 - 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 is easily mistaken.

  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 the recommended route based on bird's-eye view data having information on a departure point and a destination and information on a recommended route between the departure point and the destination. Then, based on the latitude and longitude of the starting point and the latitude and longitude of the destination, a first direction vector that connects the starting point to the destination on a planar map is calculated, and the latitude and longitude of the transition position and the Based on the latitude and longitude of the destination, a second azimuth vector that connects the destination from the transition position on a planar map is calculated, the destination is fixed with respect to a map display area, and the second azimuth vector By rotating the bird's eye view data by an amount corresponding to the fixed central axis, and adjusting the scalar quantity of the second orientation vector while the destination is fixed with respect to the map display area. A bird's-eye view data creation unit that performs data conversion to adjust the transition position to the position of the departure place by adjusting the magnification of the rotated bird's-eye view data, and the bird's-eye view data converted by the bird's-eye view data creation unit Based on this, the display unit displays the bird's-eye view showing the recommended route from the transition position to the destination on the screen, fixing the transition position matched to the departure place and the position of the destination with respect to the map display area And the bird's eye view data creation unit sets the first vector as a vector along a vertical direction at the center of the screen of the display unit, and the bird's eye view data creation unit sets the departure along the recommended route. The first vector is calculated based on the transition position moving from the ground to the destination, the data conversion process is performed, and the data-converted bird's-eye view data is displayed on the display unit. By displaying the bird's-eye view, and performs a demonstration based on.

The invention according to claim 4 is a navigation method for guiding and displaying the recommended route based on bird's-eye view data having information on a starting point and a destination and information on a recommended route between the starting point and the destination. Based on the latitude and longitude of the starting point and the latitude and longitude of the destination, a first azimuth vector connecting the starting point and the destination on the plane map is calculated, and the latitude and longitude of the transition position and the latitude of the destination are calculated. Based on the longitude, a second azimuth vector calculation connecting the destination from the transition position on the planar map is performed, the destination is fixed with respect to the map display area, and the second azimuth vector is fixed to the fixed central axis. The bird's eye view data is rotated by an amount corresponding to the image, and the destination is fixed with respect to the map display area, and the scalar amount of the second orientation vector is adjusted to rotate the data. Based on the bird's eye view data created by the bird's eye view data creating step for performing data conversion to adjust the magnification to the position of the departure place by adjusting the magnification for the eye view view data, and the bird's eye view data creating unit, A display step of fixing a transition position matched to the departure place and a position of the destination with respect to a map display area and displaying a bird's eye view showing a recommended route from the transition position to the destination on the screen; The bird's-eye view data creation step includes setting the first vector as a vector along a vertical direction at the center of the screen of the display unit, and the bird's-eye view data creation step is performed from the starting point along the recommended route. The first vector is calculated based on the transition position moving to the ground, the data conversion process is performed, and the display process is performed based on the bird's eye view data that has been converted into data. There are by displaying the bird's-eye view, and performs a demonstration.

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.

  “Standard orientation mode” is a recommendation to the destination G by fixing the current position mark Mprs at a predetermined position in the lower area and the destination mark (G) at a predetermined position in the upper area from the center position of the map display area. In this mode, the route BRD is displayed.

  In the “fixed orientation mode”, the current location mark Mprs is always located at a predetermined position in the lower area of the map display area and the destination mark is located at a predetermined position in the upper area along the y direction passing through the center position of the map display area. In this mode, (G) is fixed and the recommended route BRD to the destination G is displayed. That is, if a vertical imaginary line that divides the map display area into left and right (equal division) is the y coordinate axis (hereinafter referred to as “fixed central axis”), the current location and the destination G are made to coincide with the fixed central axis. In this mode, the current position mark Mprs is fixed at a predetermined position in the lower area from the center position of the display area, and the destination mark (G) is fixed at a predetermined position in the upper area, and the recommended route BRD to the destination G 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 starting the display of a mark indicating the starting point, the destination, and the current location, and the display of a bird's eye view including the recommended route.

  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. It is provided to display a demonstration 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 to turn it on, and touches the pause icon, it can be paused. In addition, when the user touches the pause icon in a temporarily stopped state, the user can restart the operation.

  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. The speed of the demonstration display can be adjusted accordingly. The slide volume can be set even in the pause state described above.

  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 still image playback button provided on the operation unit 8 is turned on, the display control unit 7 displays the still image in the map display area and presents it to the user.

  The “end icon” is provided to end the demonstration display.

  Next, in the state display area shown in the drawing, a ruler that displays the distance traveled along the recommended route as a percentage with the distance from the departure point S to the destination G being 100% 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, the bird's-eye view data creation unit 4 calculates the distance DST of the recommended route BRD, divides the distance DST by a fixed value (for example, 100), and sets the movement speed set in the item of movement speed to the divided value. By multiplying the values, 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”) to look down the destination G from above the departure point S. The bird's eye view data Dcg that makes the user feel visually 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. 4A, the destination G is connected from the departure point S on the plane map based on the latitude and longitude of the departure point S and the latitude and longitude of the destination G. An orientation vector Vsg is calculated.

  For convenience of explanation, the azimuth vector Vsg is drawn with an inclination in FIG. 4A. However, in the fixed azimuth mode, the direction of the azimuth vector Vsg is the fixed center of the map display area shown in FIG. It will coincide with the direction of the axis. 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.

  Then, the latitude and longitude of a 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. 4A is adjusted, and the magnification adjustment (zoom adjustment) is performed on the bird's eye view data Dcg according to the adjusted distance L. Bird's eye view data Dcg in which all of the starting point S, the destination G, and the recommended route BRD are 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. Always constant. However, as another magnification adjustment method, the depression angle is adjusted by adjusting the distance m between the departure point S and the point SB in the rear and the height H of the looking-down viewpoint P above the point SB as shown in FIG. θ may also be adjusted, and 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 demonstration display activation icon, the process proceeds to step ST8.
In step ST8, the bird's eye view data creation unit 4 calculates a position (hereinafter referred to as a “transition position”) XYprs when it has moved along the recommended route BRD by the movement distance ΔDST in a predetermined cycle (fixed cycle).

  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 a new orientation vector Vsgns from the transition position XYprs to the destination G. And the obtained bird's-eye view data Dcg is rotated by the amount that the destination G is fixed and the direction vector Vsgns is made to coincide with the fixed central axis. In other words, as illustrated in FIG. 4B, with the destination G fixed, a data conversion process for rotating the bird's eye view data Dcg by the difference vector between the orientation vector Vsgns and the fixed central axis is performed. The orientation vector Vsgns is made to coincide with the fixed central axis.

Further, the magnification adjustment similar to that shown in FIG. 4A is performed on the rotated bird's-eye view data Dcg, and the transition position XYprs is adjusted to the position of the departure place S. That is, the azimuth vector Vsg shown in FIG. 4A is replaced with the azimuth vector Vsgns, and the scalar amount (in other words, corresponding to the distance L) of the azimuth vector Vsgns is adjusted while the destination G is fixed. Thus, magnification adjustment (zoom adjustment) is performed on the rotated bird's-eye view data Dcg, and the transition position XYprs is adjusted to the position of the departure place S.
Then, the bird's eye view data obtained by the above rotation and magnification adjustment is stored (stored) in the work storage area of the storage unit 5 as new bird's eye view data Dcgns.

  Thus, when new bird's-eye view data Dcgns is created, the bird's-eye view data Dcgns is zoomed in (enlarged) by rotating the bird's-eye view including the portion of the recommended route between the transition position XYprs and the destination G in the recommended route BRD. The bird's-eye view is a data that is converted to bird's-eye view data for displaying the bird's-eye view in which the transition position XYpr is aligned with the departure point S in the map display area of the display unit 9 while the destination G remains fixed. It will be.

  Next, in step ST10, the bird's eye view data creation unit 4 creates current location mark data Dprs with the departure location S as the current location, and the current location mark data Dprs and the destination mark data Dg are newly (data converted) as described above. ) The new map display data Dmap is synthesized with the bird's eye view data Dcgns and supplied to the display unit 9 via the display control unit 7. Thereby, a bird's-eye view based on the bird's-eye view data Dcgns as illustrated in FIG. 5B is displayed in the map display area. That is, the destination mark (G) is displayed at a fixed position on the fixed central axis, and the transition position XYprs which is the current position is fixed at the same position as the departure place S, and instead of the departure place mark (S). The current location mark Mprs is displayed, and a bird's eye view that has been rotated and adjusted in magnification by the amount that the transition position XYprs is biased to the same position as the departure point S is displayed as a map.

  In other words, if the destination G is compared to a swingable fulcrum, the recommended route BRD is a crank-shaped long groove, and the fixed starting point S is a pin that is loosely fitted in the long groove, the position of the long groove with respect to the pin is biased. Accordingly, the bird's-eye view is displayed so as to swing.

  Next, in step ST11, the bird's-eye view data creation unit 4 determines whether or not the position moved by the moving distance ΔDST along the recommended route BRD has reached the destination G. If not yet reached, the process starts from step ST8. If the process has been repeated, the map display in the reached state is left as it is, and when the above-described end icon is operated, the demonstration display is ended (completed), and the standby map image (FIG. 5A) Return to 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 shown in these figures, when the demonstration display is performed, the destination G is always fixed and displayed, and the position on the recommended route BRD when moving by the moving distance ΔDST along the recommended route BRD starts. It is fixed to the ground S and displayed as a mark display Mprs, and the portion of the recommended route remaining to the destination is gradually zoomed up and displayed while swinging.

  Thus, since the destination G and the position when moving on the recommended route BRD are always displayed as marks at fixed positions in the map display area, the position of the destination G with the moved position as the current position is displayed. And the relationship between directions can be easily understood. For this reason, it can be displayed and demonstrated 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 the sense of direction.

  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 5 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 is gradually zoomed up and displayed as the moved position approaches the destination G, so that the user can see this demonstration display. Thus, 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 acquiring and rotating the map data stored in the storage unit 5, 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, The range of the map data is specified so 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.

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.
Further, the starting point S and the destination G are determined at fixed positions in the map display area by using the map data whose range is specified.

  Then, the processing of steps ST4 to ST7 shown in FIG. 3 is performed. Thereby, as illustrated in FIG. 8, the direction connecting the departure point S and the destination G is automatically set as the direction of the direction vector Vsg, and the departure point S and the destination G are aligned along the direction of the direction vector Vsg. Is displayed as a fixed mark, a recommended route BRD and a 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 the process after step ST8 shown in FIG. 3, and in step ST9, the position of the destination G in the automatically set map display area is fixed, and the movement distance The bird's eye view data is rotated and scaled so that the position (transition position) XYprs of the recommended route BRD when moving by ΔDST is biased to the fixed departure point S. In the next step ST10, the rotation is performed. The bird's-eye view is displayed as a map on the basis of the bird's-eye view data that has been subjected to the magnification adjustment.

  In step ST11, the bird's-eye view data creation unit 4 determines whether or not the moved position has reached the destination G. If the position has not reached yet, the process from step ST8 is repeated. When the operation is stopped and the end icon described above is operated, the demonstration display is ended (completed) and the display returns to the display of the standby map image (see FIG. 8).

As described above, even when the standard azimuth mode is set, the destination G is fixed and the position moved along the recommended route BRD is biased to the departure point S as in the case where the fixed azimuth mode is set. Since the map is displayed in a fixed manner, a demonstration display that is easy for the user to understand can be provided.
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 and displayed at the position of the fixed departure place S indicates the position where the mobile object has actually moved.

  For this reason, it is possible to present a map that is easy for a user who is not good at reading a map or a user who is unfamiliar with a sense of direction to understand.

  Further, when the moving body moves toward the destination G, the destination G and the current location mark Mprs are fixedly displayed at predetermined positions in order from FIG. 5A to FIG. 7B. When the zoomed-up bird's-eye view is displayed and the moving object returns to the current location S side, the destination G and the current location mark Mprs are fixedly displayed at predetermined positions in the order from FIG. 7 (b) to FIG. 5 (a). Until then, the bird's-eye view zoomed down is displayed.

  For this reason, as the user approaches the destination G, it becomes easier to specify the route to the destination G, and in particular, to present a map that is easy to understand for users who are not good at reading maps or who are not familiar with direction. Can do.

  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 azimuth mode, the actual position where the moving body has moved is displayed as the current position mark Mprs at the position of the departure place S that is automatically determined and fixed. Further, the destination is automatically determined and fixed and displayed.

  For this reason, it is easy to understand the relationship between the position of the moving body on the recommended route BRD and the destination, and presents a map that is easy to understand for users who are not good at reading maps or who are not familiar with the direction sense. it can.

  Further, when the moving body moves toward the destination G, the destination G and the current location mark Mprs are fixedly displayed at predetermined positions in order from FIG. 5A to FIG. 7B. When the zoomed-up bird's-eye view is displayed and the moving object returns to the current location S side, the destination G and the current location mark Mprs are fixedly displayed at predetermined positions in the order from FIG. 7 (b) to FIG. 5 (a). Until then, the bird's-eye view zoomed down is displayed.

For this reason, as the user approaches the destination G, it becomes easier to specify the route to the destination G, and in particular, to present a map that is easy to understand for users who are not good at reading maps or who are not familiar with direction. Can do.
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 moved position and the destination G are fixed, and a bird's eye view is displayed on the map. The map can be displayed so that it can be easily understood by the user.

  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 (4)

A navigation system having a display function for guiding the recommended route based on bird's-eye view data having information on a starting point and a destination and information on a recommended route between the starting point and the destination,
Based on the latitude and longitude of the starting point and the latitude and longitude of the destination, a first orientation vector that connects the starting point to the destination on the plane map is calculated,
Based on the latitude and longitude of the transition position and the latitude and longitude of the destination, a second azimuth vector calculation connecting the destination from the transition position on a planar map,
Fixing the destination with respect to the map display area, rotating the bird's eye view data by an amount corresponding to the second azimuth vector to a fixed central axis,
By adjusting the scalar amount of the second orientation vector while fixing the destination with respect to the map display area, the magnification is adjusted for the rotated bird's-eye view data, and the transition position is A bird's eye view data creation unit that performs data conversion to match the position of the departure place,
Based on the bird's eye view data converted by the bird's eye view data creation unit, the transition position matched to the departure place and the position of the destination are fixed with respect to the map display area, and the transition position is displayed on the screen. A display that displays a bird's eye view showing the recommended route to the destination ;
With
The bird's eye view data creation unit sets the first vector as a vector along a vertical direction of a screen center of the display unit;
The bird's-eye view data creation unit calculates the first vector based on the transition position moving from the departure point to the destination along the recommended route, performs the data conversion process, and displays data on the display unit. Demonstration by displaying a bird's-eye view based on the converted bird's-eye view data,
A navigation system characterized by The bird's eye view data creation means adjusts the moving speed of the transition position according to an instruction from a user;
The navigation system according to claim 1. A current position detecting means for detecting a current position of a moving body comprising the navigation system;
The bird's-eye view data creation means performs the data conversion using the current position detected by the current position detection means as the transition position in accordance with an instruction from a user, and the bird's-eye view data based on the bird's-eye view data converted into data is displayed on the display means. The navigation system according to claim 1, wherein navigation is performed by displaying a message. A navigation method for guiding and displaying the recommended route based on bird's-eye view data having information on a departure point and a destination and information on a recommended route between the departure point and the destination,
Based on the latitude and longitude of the starting point and the latitude and longitude of the destination, a first orientation vector that connects the starting point to the destination on the plane map is calculated,
Based on the latitude and longitude of the transition position and the latitude and longitude of the destination, a second azimuth vector calculation connecting the destination from the transition position on a planar map,
Fixing the destination with respect to the map display area, rotating the bird's eye view data by an amount corresponding to the second azimuth vector to a fixed central axis,
By adjusting the scalar amount of the second orientation vector while fixing the destination with respect to the map display area, the magnification is adjusted for the rotated bird's-eye view data, and the transition position is A bird's eye view data creation process for performing data conversion to match the position of the departure place,
Based on the bird's eye view data converted by the bird's eye view data creation unit, the transition position matched to the departure place and the position of the destination are fixed with respect to the map display area, and the transition position is displayed on the screen. A display process for displaying a bird's eye view showing a recommended route to the destination;
With
In the bird's eye view data creation step, the first vector is a vector along a vertical direction at the center of the screen of the display unit;
The bird's-eye view data creation step calculates the first vector based on the transition position moving from the departure point to the destination along the recommended route, performs the data conversion process, and the display step includes data Demonstration by displaying a bird's-eye view based on the converted bird's-eye view data,
A navigation method characterized by the above.

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