JP2008209140A - Navigation device and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a technology for properly reflecting an information for renewal of a road, which a user noticed, on the map data utilized for a navigation device. <P>SOLUTION: An operation for drawing a road on a map editing display 200 shown on a display part is accepted, and based on the accepted operation, the road is drawn on the map editing display 200. And according to the road drawn on the map editing display 200, the map data stored in a map data storing part are corrected, Moreover, when a vehicle is traveling on the road which is added to the map data by a user's drawing, the position and the shape of the road are corrected based on the running trucks. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a technique for updating map data used in a navigation device.

  2. Description of the Related Art Conventionally, a navigation device that displays a map around the current position of a mobile object based on map data stored in a map storage medium such as a DVD-ROM or a hard disk, or performs optimum route guidance to a designated destination. Widely used. In this kind of navigation device, to maintain the accuracy of map display and route search, the map data is updated to the latest by various methods, so that the changing roads are appropriately reflected in the map. Can be done. Examples of conventional techniques for updating map data include the following (1) to (3).

  (1) Replace the portable map storage medium (DVD-ROM, CD-ROM, etc.) with the latest one, or store it in the HDD using the update map data stored in the portable storage medium. The map data is updated by rewriting the map data.

  (2) When a road that does not exist in map data is passed, it is related to the road based on the driving locus obtained from the positioning result by GPS (Global Positioning System) or the positioning result by autonomous navigation using a gyro sensor, speed sensor, etc. Automatically generate data and update map data.

(3) As described in Patent Document 1, in response to a request from the navigation system, only necessary update information from the external data providing system is provided to the navigation system by communication.
Japanese Patent Laid-Open No. 2004-4104

  However, replacing the map storage medium or rewriting the map data in the hard disk as in the above method (1) is expensive in order to obtain the update data, and the update data is converted into the update data. Includes a map that is not necessary for the user (distant from where the user does not go), and is therefore wasteful. Further, in the method of automatically generating a road on the map data from the actual travel locus as in the method (2), it is necessary to travel on the road at least once. Therefore, the road in a place away from the user's normal range of action is not practical because map data is not updated unless the user goes there and travels along the road. In addition, as in the method (3) above, in order to acquire the update information through communication, it is necessary for the user to bear the charge for the update data and the communication cost.

  Furthermore, as a problem common to the methods (1) and (3), a new road is opened or old until the map data for update is created and issued by a map production company that provides the map data. Even if the road is abolished, the user must continue to use old map data that does not reflect these changes. That is, even if the user learns of the opening of a new road that is not on the map or the abolition of the old road, it is not convenient for the user because they are not immediately reflected in the map data. In particular, when a new road is opened in the user's normal range of activity, such as near the home or a road that is frequently used, the user will feel even more inconvenient if the road is not immediately available on the navigation device. .

  This invention is made in view of such a problem, and it aims at providing the technique for reflecting the information regarding the update of the road which the user knew appropriately to the map data utilized with a navigation apparatus.

  The navigation device according to claim 1, which has been made to achieve the above object, is capable of correcting road map data by drawing from a user, and further added by drawing from a user based on an actual movement trajectory. It is characterized by correcting the road.

  Specifically, the navigation device according to claim 1 receives an operation for drawing a road on the map image displayed on the display unit, and draws a road on the map image based on the received operation. . And the road map data memorize | stored in the map memory | storage means are corrected according to the road drawn on the map image. After that, when it is determined that the moving body has passed on the road added to the road map data, the road in the road map data is based on the movement trajectory of the moving body when the road passes based on the detection result by the position detecting means. Correct the position and shape.

  According to the navigation device configured as described above, the user can correct the road map data by drawing the road on the map image. Therefore, since the user knows that a new road has been opened or an old road has been abolished, the road map data can be corrected at any time, which is convenient. In addition, there is no need to wait for the update data to be issued by a map production company, etc. as before, and to purchase it or to actually pass the newly opened road. It is advantageous in terms of cost and immediacy of renewal.

  In addition, it is thought that the road drawn by the user contains an error in a position and a shape compared with an actual road. Therefore, when the road added by the drawing from the user actually passes, the accuracy of the corrected road map is improved by correcting the error of the position / shape of the road based on the moving trajectory at that time. This improves the convenience of the navigation device.

  By the way, with respect to a road newly added to the road map data by drawing by the user, it is desirable to correct the error as soon as possible based on the actual movement trajectory from the viewpoint of keeping the map with high accuracy. Therefore, it is considered to use the route search function of the navigation device so that the road added by drawing by the user is preferentially included in the route to the destination, and the user is encouraged to pass the road. It is done.

  Specifically, as set forth in claim 2, when setting a route to the destination based on the road map data stored in the map storage means, the correction is made among the roads added to the road map data. It is good to comprise so that the road which is not performed may be preferentially selected for the route to the destination.

  For the route search in the navigation device, the Dijkstra method or cost calculation according to the Dijkstra method is generally used. Therefore, in the route search in such a cost calculation, for example, by setting the cost for the uncorrected road drawn by the user lower than the normal level, it is easy to be selected as a route to the destination, etc. A method of increasing the weight (priority) at the time of route search for the road can be considered. Alternatively, it is conceivable to always include the road drawn by the user in the route to the destination.

  According to the navigation device configured as described above, by using the route search function of the navigation device, the road added by the drawing by the user can be passed at an early stage, and as a result, an error based on the movement trajectory This is preferable because the correction can be performed quickly.

  Next, when the navigation device according to claim 3 displays the map image on the display means, the road that has not been corrected by the correction means among the roads added to the road map data by the map correction means is highlighted. It is characterized by doing.

  According to the navigation device configured as described above, the uncorrected road added by the drawing by the user is highlighted on the map image displayed on the display unit, so that the presence of the uncorrected road is shown to the user. It is possible to effectively recognize the user and to prompt the user to travel on the road. As a result, it is preferable that the user can quickly correct the error based on the movement trajectory by passing through the road.

  In addition, as a method of highlighting the uncorrected road added by the drawing by the user, the map image is displayed blinking, displayed thicker than other roads, or displayed in a color conspicuous from other roads. Various methods can be considered in which the line type of the line indicating the road is different from that of other roads.

  Next, the navigation device according to claim 4, after determining that the moving body has passed on the road added to the road map data by the map correction means, the navigation device in the road map data based on the movement locus of the moving body. Before correcting the shape of the road, the user is inquired about whether or not to execute the correction, and when the user gives an instruction to permit the correction, the correction is performed. According to the navigation device configured as described above, the user himself / herself can determine whether or not the road drawn by the user can be corrected, which is convenient.

  In order to realize the drawing unit, the map correcting unit, and the correcting unit in the navigation apparatus as described above in a computer system, the program may be provided as a program that operates on the computer system. Such a program is recorded on a computer-readable storage medium such as a magnetic disk, a CD-ROM, a hard disk, a ROM, or a RAM, and loaded into the computer as necessary, so that each of the above-described means is used. Functions can be realized.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[Description of Configuration of Navigation Device 1]
FIG. 1 is a block diagram showing a schematic configuration of an in-vehicle navigation device 1 according to an embodiment of the present invention.

  As shown in FIG. 1, the navigation apparatus 1 inputs a position detector 21 that detects the current position of the vehicle, a map data storage unit 22 that stores map data and various information, and various instructions from the user. The operation switch group 23 for displaying, the display part 24 for performing various displays, such as a map display screen, the speaker 25 for outputting various guide audio | voices, etc., and navigation ECU26 are provided.

  The position detector 21 receives a radio wave transmitted from an artificial satellite for GPS via a GPS antenna, detects a position of the vehicle, etc., and a detection signal corresponding to the angular velocity of the rotational motion applied to the vehicle. Is provided, and a vehicle speed sensor 21c that outputs a detection signal corresponding to the speed of the vehicle is provided. Each of the sensors 21a to 21c has an error having a different property, and is configured to be used while complementing each other. Depending on the accuracy, a part of the sensors described above may be used, or a steering rotation sensor, a wheel sensor of each rolling wheel, or the like may be used.

  Based on the control from the navigation ECU 26, the map data storage unit 22 reads the data from the non-volatile storage medium and inputs it to the navigation ECU 26. The data stored in the nonvolatile storage medium is so-called map matching data for improving the position detection accuracy, map data, route guidance data, a program for operating the navigation device 1, and the like. . As a storage medium for these data, a rewritable nonvolatile storage medium such as a hard disk, a flash memory, or a memory card can be used.

  The map data includes various data such as node data, link data, cost data, road data, mark data, intersection data, and facility data. Node data is data consisting of node IDs, which are node identification numbers, node coordinates, link IDs of all links connected to the nodes, and node characteristic information such as node types (types such as intersections and junctions). It is. The link data includes a link ID that is a link identification number, a link length, a node ID of each node connected to the start point and the end point, a road type such as a highway, a toll road, a general road, a road width, the number of lanes, and a link travel time. It consists of various data such as legal speed limit, road gradient, distance and time cost for traveling on the road.

The operation switch group 23 includes a touch panel that is integrated with the display unit 24 and is installed on the display screen, and mechanical key switches that are provided around the display unit 24.
The display unit 24 is a color display device having a display surface such as a liquid crystal display. The display unit 24 can display various images on the display surface according to the input of the video signal from the navigation ECU 26. For example, when the vehicle is traveling, a mark indicating the current location identified from the current position of the vehicle detected by the position detector 21 as the navigation screen and the map data input from the map data storage unit 22 and guidance to the destination Additional data such as a route, name, landmark, and various landmark symbols are displayed in an overlapping manner.

  The speaker 25 is configured so that various information can be notified to the user by voice. Thereby, various guidance such as route guidance can be given to the user both by the display by the display unit 24 and the sound output from the speaker 25.

  The navigation ECU 26 is configured around a known computer including a CPU, a ROM, a RAM, an I / O, a bus line connecting these components, and the like, and comprehensively controls the above-described components. The navigation ECU 26 executes various processes according to a program stored in a ROM or the like. The navigation ECU 26 includes, as functional components, a position calculation unit 31, a memory unit 32, a route calculation unit 33, a map matching unit 34, a travel locus generation unit 35, a map correction / correction unit 36, a map data acquisition unit 37, An operation detection unit 38, a route guide unit 39, a drawing unit 40, an image output unit 41, and an audio output unit 42 are provided. These constituent elements abstractly show the functions of the navigation ECU 26, and these functions are realized by the CPU, ROM, RAM, and the like provided in the navigation ECU 26.

  The position calculation unit 31 calculates the current position of the vehicle based on the input signal from the position detector 21. The memory unit 32 temporarily holds data used for various processes performed by the navigation ECU 26. The route calculation unit 33 calculates an optimum route to the destination input by the user. The map matching unit 34 specifies the current position of the vehicle on the road based on the correlation between the movement locus of the vehicle and the road shape based on the map data.

  The travel locus generation unit 35 generates a movement locus until the vehicle reaches the current position based on the calculation result by the position calculation unit 31. The map correction / correction unit 36 executes various processes related to correction of map data based on drawing by the user and correction of the corrected map data. The map data acquisition unit 37 reads map data and the like necessary for processing from the map data storage unit 22. The operation detection unit 38 detects an operation from the user on the operation switch group 23.

  Based on the route to the destination calculated by the route calculation unit 33, the route guide unit 39 outputs information for displaying route guidance to the destination and outputting sound. The drawing unit 40 draws a map image around the current position, various types of guide information, and the like based on the output information from the route guide unit 39. The image output unit 41 outputs a video signal based on the image drawn by the drawing unit 40 to the display unit 24. The voice output unit 42 outputs a voice signal such as a guide voice to the speaker 25 based on the output information from the route guide unit 39.

  The navigation ECU 26 performs various processes by the functions of the above-described units. For example, the navigation-related processing includes map display processing and route guidance processing. In the map display process, the current position of the vehicle is calculated as a set of coordinates and traveling directions based on each detection signal from the position detector 21, and the map near the current position read from the map data storage unit 22 is displayed on the display unit 24. It is a process to display. The route guidance process calculates the optimum route from the current position to the destination based on the map data stored in the map data storage unit 22 and the destination set according to the operation of the operation switch group 23. This is a process for performing travel guidance for the calculated route. As a method for automatically setting an optimum route in this way, a method such as cost calculation by the Dijkstra method is known.

  Further, the navigation ECU 26 (particularly the map correction / correction unit 36) corrects the map data used in the above-described various processes by an operation in which the user draws a road on the map image displayed on the display unit 24, The process which correct | amends the road corrected by drawing of based on an actual driving | running locus is performed. Details of these processes will be described later.

  The schematic configuration of the navigation device 1 according to the embodiment has been described above. The correspondence between each configuration in the present embodiment and the configuration described in the claims is as follows. The map data storage unit 22 of the navigation device 1 in this embodiment corresponds to the map storage means in the claims. The display unit 24 corresponds to display means. Further, the operation switch group 23 and the operation detection unit 38 of the navigation ECU 26 correspond to an operation receiving unit. The map correction / correction unit 36 of the navigation ECU 26 corresponds to a drawing unit, a map correction unit, and a correction unit. The position detector 21 and the position calculation unit 31 of the navigation ECU 26 correspond to position detection means. The route calculation unit 33 of the navigation ECU 26 corresponds to route setting means.

  Hereinafter, the “map drawing / correction process” and the “user drawing road correction process” executed by the map correction / correction unit 36 of the navigation ECU 26 will be described with reference to the flowcharts of FIGS. This will be described based on the explanatory diagram.

[Explanation of map drawing / correction processing]
FIG. 2 is a flowchart showing the procedure of “map drawing / correction processing” executed by the map correction / correction unit 36 of the navigation ECU 26.

  In this process, first, a selection instruction for the “map drawing” function is received from the user through the menu screen displayed on the display unit 24 (S100). Subsequently, according to the selection instruction from the user, the map data of the area to be edited is read from the map data storage unit, and the map image for editing is displayed on the display unit 24 (S110).

  Here, an example of image display on the display unit 24 in the processing of S100 and S110 will be described with reference to FIG. FIG. 3A is a diagram illustrating a display example of a menu screen for the user to select a function to be executed by the navigation device 1. On this menu screen 100, various icons 50a to 50g such as “guidance cancellation”, “volume setting”, “VICS”, “memory point”, “user customization”, “various settings”, “map drawing” are displayed. Yes. Each of these icons constitutes a GUI (Graphical User Interface) in conjunction with a touch panel formed on the display surface of the display unit 24. When the user directly touches the icon on the screen, the function of the icon is displayed. (Hereinafter, the same operation is expressed as “press icon” or the like).

  When the user presses a “map drawing” icon 50g for performing map drawing by the user on the menu screen 100, an editing area selection screen 110 shown in FIG. 3B is displayed. Note that the detailed contents of the functions corresponding to the other icons are not the essential part of the present invention, and the description thereof will be omitted.

  The editing area selection screen 110 shown in FIG. 3B is a screen for selecting a method desired by the user from various methods for specifying the area to be edited. Various icons 51a to 51e such as "periphery", "address", "in order of Japanese syllabary", "zip code", and "memory point" are displayed. Here, by pressing the “around home” icon 51a, the area around the point registered in advance as the user's home is selected as an editing target, and a map of the area is displayed on the map editing screen (see FIG. 4). Is done.

  In addition, when the “address” icon 51b is pressed, the mode is shifted to the address input mode. When the user inputs an address here, the surrounding area of the point indicated by the address is selected as an editing target, and a map of the area is displayed on the map editing screen. In addition, by pressing the “50-sound order” icon 51c, a list of place names arranged in the order of 50 notes is displayed, and the area indicated by the place name selected by the user is selected as an edit target from this list, and the map of the area is displayed. Is displayed on the map editing screen.

  Further, when the “zip code” icon 51d is pressed, the mode shifts to the zip code input mode. When the user inputs a zip code, the area indicated by the zip code is selected as an editing target, and a map of the area is displayed on the map editing screen. In addition, by pressing the “memory point” icon 51e, an area around a specific point (memory point) registered in advance by the designation from the user is selected as an editing target, and a map of the area is displayed on the map editing screen. Is done.

  Returning to the flowchart of FIG. After the map image for editing is displayed in S110, an operation from the user for drawing the map is accepted via the touch panel, and a road is drawn (addition / deletion of a road) on the map editing screen according to the accepted operation. (S120). While the editing completion instruction is not input from the user (S130: NO), the process of S120 is continued. Then, when an editing completion instruction is input from the user (S130: YES), the map data of the area stored in the map data storage unit 22 is corrected based on the content of the road drawn on the map editing screen. (S140), and the “map drawing / correction process” is terminated.

  Here, an example of image display on the display unit 24 in the processes of S120 to S140 will be described with reference to FIG. FIG. 4 is a diagram illustrating a display example of a map editing screen displayed on the display unit 24 after selecting an editing area.

  When the user presses the “around home” icon 51a on the above-described editing area selection screen 110 (see FIG. 3B), as shown in FIG. 4A, the center of the map editing screen 200a has a home. A map of the surrounding area is displayed. In addition, a “pen” icon 52a that is pressed when a road is written on the map, an “eraser” icon 52d that is pressed when an unnecessary road on the map is deleted, and a button that is pressed when map editing is completed. The “edit complete” icon 52c to be displayed is displayed.

  When the user presses the “pen” icon 52a, as shown in FIG. 4B, this icon is reversed to enter the road writing mode. The point at which the user touches the screen in this state is the starting point of the newly written road, and the road 53 is drawn on the map image along the movement trajectory by moving the finger without releasing it from the screen. Then, when the user releases his / her finger from the screen, the released point becomes the end point of the newly written road (see FIG. 4C). Further, when the “eraser” icon 52b is pressed, the icon is reversed and the road erasing mode is set. In this state, when the user traces the existing road on the map screen or the road drawn by the user with the finger, the road is deleted from the map image.

  After the user has drawn the map (adding / deleting roads) according to the above procedure, the user presses the “edit completed” icon 52c, and the drawn content is converted into the map data in the map data storage unit. Reflected. For example, for roads newly added by user drawing (hereinafter referred to as user-drawn roads), the node data corresponding to the coordinates of both ends of the road, road link data, the cost according to the length of the road Data, data relating to the shape of the road, etc. are created and stored as map data. In addition, when there is an existing road that intersects or is connected to the user-drawn road, connection information of nodes and links corresponding to the existing road is also changed.

  Further, when an existing road is erased by the user's drawing, link data corresponding to the road is erased, and connection information and the like on other roads that intersect or connect to the road are also changed.

[User-drawn road correction processing]
Next, a process for correcting the user-drawn road added to the map by the above-described “user-drawn road correction process” based on the travel locus of the vehicle will be described.

FIG. 5 is a flowchart showing the procedure of “user-drawn road correction process” executed by the map correction / correction unit 36 of the navigation ECU 26.
In this process, first, it is determined in the navigation ECU 26 whether a route search is performed or a map display is performed (S200). Here, when it is determined that a route search is performed (S200: route search), the road is a user-drawn road added to the map data and has not yet been corrected based on the travel locus of the vehicle (hereinafter referred to as “not yet”). The route search is executed so that the correction user-drawn road (referred to as a correction user-drawn road) is preferentially selected as the route (S210). Specifically, the cost registered in advance in the map data for the uncorrected user-drawn road is temporarily set to a value lower than the normal value, thereby making it easier to select a route preferentially than other roads.

  Here, a specific example in which an uncorrected user-drawn road is preferentially selected as a route in S210 will be described with reference to FIG. In the map shown in FIG. 6, there are nodes A, B, C, D, E, and F, and a link is set between nodes that can pass between one node and the other node. Yes. Of these, the link connecting the nodes C and D corresponds to an uncorrected user-drawn road. Cost is set for each link, link AB (refers to a link connecting node A and node B. The same applies to other links), cost 30 for link BC, cost 30 for link BE, cost 40 for link BE, link CD is cost 50 (but before cost correction), link DF is cost 10, and link EF is cost 30.

In such a map, it is assumed that an optimum route that minimizes the total cost from the node A as the departure point to the node F as the destination is searched.
(1) When cost calculation is performed with the normal cost of the user-drawn road (link CD) before correction being performed, a route (route 1) passing through node A → node B → node C → node D → node F The total cost is 30 + 30 + 50 (no cost correction) + 10 = 120. On the other hand, the total cost of the route (route 2) that passes through node A → node B → node E → node F is 30 + 40 + 30 = 100. Therefore, in this case, route 2 is selected as the optimal route that minimizes the total cost.

  (2) Next, as a measure for preferentially selecting a route on the user-drawn road before correction, a case is assumed where the cost is calculated by temporarily correcting the link CD cost to a small value (50 → 25). To do. In this case, the total cost in the route 1 is 30 + 30 + 25 (with cost correction) + 10 = 95. On the other hand, the total cost in the above-described route 2 remains 100. Therefore, in this case, the route 1 including the user-drawn road (link CD) before correction is selected as the optimum route that minimizes the total cost.

  In this way, during the route search, the cost corresponding to the uncorrected user-drawn road is corrected to a value lower than the pre-registered normal value, and the cost calculation is performed. The route to the ground is preferentially selected.

  Returning to the flowchart of FIG. If it is determined in S200 that map display is performed (S200: map display), the uncorrected user-drawn road in the map display range on the screen is highlighted (S220). FIG. 7 is a diagram illustrating a display example of a map display screen around the current position of the vehicle on the display unit 24. As shown in FIG. 7, an uncorrected user-drawn road 53 exists within the map display range on the map display screen 300. At this time, the uncorrected user-drawn road 53 is highlighted to make it easier for the user to visually recognize it than other roads. Specific examples of the highlight display include blinking display, reverse display, display in a color conspicuous from other roads, and methods of changing other roads and display line types (thick lines, broken lines, dotted lines, etc.).

  Returning to the flowchart of FIG. Next, it is determined whether or not the vehicle has traveled on an uncorrected user-drawn road (S230). In order to determine whether or not the vehicle has traveled on an uncorrected user-drawn road, for example, whether or not the travel locus of the vehicle has passed a predetermined range from the road, or the current position of the vehicle is determined by the map matching unit 34. What is necessary is just to determine by whether it was correct | amended on the said road. If it is determined that the vehicle is not traveling on an uncorrected user-drawn road (S230: NO), the process returns to S200.

  On the other hand, if it is determined that the vehicle has traveled on an uncorrected user-drawn road (S230: YES), correction data for correcting the user-drawn road is generated based on the travel locus corresponding to the user-drawn road. (S240). Subsequently, a correction icon for notifying the user that correction data applicable to the uncorrected user-drawn road exists is displayed on the display unit 24 (S250).

  Then, it is determined whether or not the correction icon has been pressed by the user (S260). If it is determined that the correction icon has not been pressed (S260: NO), the process returns to S200. On the other hand, if it is determined that the correction icon has been pressed (S260: YES), a message for inquiring the user whether to apply the correction data is displayed on the display unit 24 (S270), and the correction is permitted from the user. It is determined whether or not an instruction has been input (S280). When it is determined that an instruction to permit correction is input from the user (S280: YES), the map data corresponding to the uncorrected user-drawn road is rewritten based on the correction data (S290), The process is terminated. On the other hand, if it is determined that an instruction not to permit correction is input from the user (S280: NO), the correction data is discarded (S300), and the “user-drawn road correction process” is terminated.

  Here, an example of image display on the display unit 24 in the processing of S250 to S300 will be described with reference to FIG. FIG. 8 is a diagram illustrating a display example on the display unit 24 when the user-drawn road is corrected based on the actual travel locus.

  As shown in the map display screen 400a in FIG. 8A, when the actual travel locus corresponding to the user-drawn road 53a has a shape as indicated by the dotted line 53b, the correction data is based on this travel locus 53b. Generated. Then, a “correction data present” icon 54a indicating to the user that there is correction data applicable to the user-drawn road 53a is displayed on the screen.

  Here, when the user presses the “correction data present” icon 54a, as shown in the map display screen 400b of FIG. 8B, “There is correction data based on the travel locus. Do you want to correct the broken road? "Yes" and "No" icons 54b and 54c for the user to indicate whether correction is permitted or not are displayed. At this time, the user-drawn road 53c is displayed with a broken line. When the user presses the “Yes” icon 54b, the map data is corrected by the correction data. Accordingly, the user-drawn road 53 on the map display screen 400b is deleted, and the corrected road 53d is newly displayed. When the user presses the “No” icon 54b, the correction data is discarded and the screen returns to the normal map display screen.

[effect]
The navigation device 1 according to the embodiment has the following effects.
(1) The user can correct the map data by drawing a road on the map image. Therefore, it is convenient because the map data can be corrected at any time after the user knows the opening of a new road or the abolition of an old road. In addition, there is no need to wait for the update data to be issued by a map production company, etc. as before, and to purchase it or to actually pass the newly opened road. It is advantageous in terms of cost and immediacy of renewal.

  (2) The road drawn by the user is considered to include an error in position and shape as compared to an actual road. Therefore, when the vehicle actually travels on the user-drawn road, the accuracy of the map can be improved by correcting the position / shape error of the user-drawn road based on the travel locus at that time.

  (3) For a user-drawn road that has not been corrected based on the travel locus, it is desirable to correct the error as quickly as possible from the viewpoint of keeping the map highly accurate. Therefore, when performing a route search, it is possible to prompt the user to travel on the road by preferentially selecting an uncorrected user-drawn road as a route to the destination.

  (4) When displaying the map image on the display unit 24, the user can effectively recognize the presence of the uncorrected user-drawn road by highlighting the uncorrected user-drawn road, and the user It is possible to effectively encourage the vehicle to travel on the road. As a result, it is preferable that the user can quickly correct the error based on the traveling locus when the user passes the road.

  (5) When a vehicle passes on an uncorrected user-drawn road, the presence of correction data based on the travel locus of the vehicle is presented to the user, and the user is inquired whether to correct the user-drawn road. be able to. Thereby, the user himself / herself can determine whether or not correction for the user-drawn road is possible, which is convenient.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and can be implemented in various modes as long as they belong to the technical scope of the present invention.

  For example, in the above-described embodiment, the present invention is realized as a vehicle-mounted navigation device. However, the present invention is not limited to a vehicle-mounted device, and can be applied to, for example, a so-called portable navigation device that can be carried by a user.

It is a block diagram which shows schematic structure of the navigation apparatus 1 which is one Embodiment of this invention. 7 is a flowchart showing a procedure of “map drawing / correction processing” executed by the map correction / correction unit 36 of the navigation ECU 26. It is a figure which shows the example of a display of the menu screen in the display part 24, and an edit area selection screen. It is a figure which shows the example of a display of the map edit screen in the display part. It is a flowchart which shows the procedure of the "user drawing road correction process" which the map correction and correction | amendment part 36 of navigation ECU26 performs. It is a figure which shows typically the specific content of the measure which selects a user drawing road as a path | route preferentially in the case of a route search. It is a figure which shows the example of a display of the uncorrected user drawing road in the map display screen of the display part. It is a figure which shows the example of a display in the display part 24 at the time of correct | amending a user drawing road based on an actual travel locus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Navigation apparatus, 21 ... Position detector, 21a ... GPS receiver, 21b ... Gyroscope, 21c ... Vehicle speed sensor, 22 ... Map data storage part, 23 ... Operation switch group, 24 ... Display part, 25 ... Speaker, 26 ... Navigation ECU, 31 ... Position calculation part, 32 ... Memory part, 33 ... Route calculation part, 34 ... Map matching part, 35 ... Running locus generation part, 36 ... Map correction / correction part, 37 ... Map data acquisition part, 38 ... an operation detection unit, 39 ... a route guide unit, 40 ... a drawing unit, 41 ... an image output unit, 42 ... an audio output unit.

Claims (5)

A navigation device comprising map storage means for storing road map data and display means for displaying an image, wherein a map image based on the road map data stored in the map storage means can be displayed on the display means.
Operation accepting means for accepting an operation from a user;
A drawing means for receiving an operation for drawing a road on the map image displayed on the display means via the operation receiving means, and drawing a road on the map image based on the received operation;
Map correction means for correcting road map data stored in the map storage means according to the road drawn on the map image by the drawing means;
Position detecting means for detecting the current position of the moving body;
When it is determined that the moving body has traveled on the road added to the road map data by the map correction means, based on the movement trajectory of the moving body during the road traffic based on the detection result by the position detection means, Correction means for correcting the position and shape of the road in the road map data;
A navigation device characterized by the above. The navigation device according to claim 1, wherein
Route setting means for setting a route to the destination based on the road map data stored in the map storage means;
The route setting means preferentially selects a road that has not been corrected by the correction means from among roads added to the road map data by the map correction means as a route to a destination. Navigation device. The navigation device according to claim 1 or 2,
A navigation apparatus characterized in that, when a map image is displayed on the display means, a road that has not been corrected by the correction means is highlighted among roads added to the road map data by the map correction means. The navigation device according to any one of claims 1 to 3,
The correction means corrects the shape of the road in the road map data based on the movement locus of the moving body after determining that the moving body has passed on the road added to the road map data by the map correction means. A navigation apparatus characterized by inquiring of the user whether or not to perform the correction before performing the correction, and performing the correction when the user gives an instruction to permit the correction.   A program for controlling a computer used in the navigation device according to any one of claims 1 to 4, for causing the computer to function as the drawing unit, the map correction unit, and the correction unit. Program.

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