JP2019049443A - In-vehicle device, hazard map display system - Google Patents

Abstract

To enable a hazard map to be properly displayed on a navigation screen.SOLUTION: An in-vehicle device is mounted on a vehicle, and comprises: a position calculation part calculating an own vehicle position; a display control part controlling a video signal of an image displayed in a display device; a map information storage part storing information regarding the map; a navigation part outputting, to the display control part, navigation map information generated using the own vehicle position calculated by the position calculation part and the information regarding the map stored in the map information storage part; an in-vehicle communication part receiving the information regarding hazard map and reference point information which is the information regarding a position of a hazard map; and an image composite part rotating or expanding or reducing the hazard map so as to match with an orientation and a range in map information on the basis of the reference point information.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an in-vehicle device and a hazard map display system.

  In response to rising awareness of disaster prevention, in recent years various local governments have released hazard maps, which are predicted damage information for each point. Patent Document 1 describes an in-vehicle navigation device that includes an emergency evacuation determination unit that determines whether or not emergency evacuation is necessary, and an emergency evacuation site if evacuation is necessary as a result of the determination by the emergency evacuation determination unit. An on-vehicle navigation apparatus is disclosed, comprising: an emergency evacuation site identification unit; and a route guidance unit for guiding a route to a location identified by the emergency evacuation site identification unit.

JP, 2009-122004, A

  Vehicle occupants often acquire information via the navigation screen. When acquiring the hazard map by communication and displaying it on the navigation screen, if the acquired hazard map is displayed as it is, the occupant can not effectively utilize the information of the hazard map. That is, in the invention described in Patent Document 1, the hazard map can not be appropriately displayed on the navigation screen.

A vehicle mounted device according to a first aspect of the present invention is a vehicle mounted device mounted on a vehicle, comprising: a position calculation unit that calculates a vehicle position; and a display control unit that controls a video signal of a video displayed on a display device. Navigation map information generated using a map information storage unit for storing information on a map, the vehicle position calculated by the position calculation unit, and information on the map stored in the map information storage unit In the navigation map information based on the reference point information, a navigation unit to be output to the display control unit, an in-vehicle communication unit for receiving information on a hazard map, and reference point information that is information on a position of the hazard map And an image combining unit that outputs the hazard map to the display control unit by rotating or enlarging or reducing to match the direction and range.
The hazard map display system according to the second aspect of the present invention is a hazard map display system provided with a server and the above-described in-vehicle device, wherein the server is a hazard map acquisition unit that acquires the hazard map; A reference point generation unit that generates the reference point information in a map, and a server communication unit that transmits the hazard map and the reference point information.
An on-vehicle apparatus according to a third aspect of the present invention is an on-vehicle apparatus mounted on a vehicle, and includes a position calculation unit that calculates the position of the vehicle, a hazard map acquisition unit that acquires information on a hazard map, and a display device. A display control unit for controlling an image signal of an image to be displayed, a map information storage unit for storing information on a map, the vehicle position calculated by the position calculation unit, and a map stored in the map information storage unit A navigation unit for outputting navigation map information generated using the information to the display control unit, a reference point generation unit for generating reference point information which is information on a position in the acquired hazard map, and the reference point Based on the information, it rotates or expands or reduces to match the direction and range in the navigation map information, and the hazard map is output to the display control unit And an that the image combining unit.

  According to the present invention, the hazard map can be appropriately displayed on the navigation screen.

System configuration of hazard map display system S in the first embodiment Diagram showing an example of hazard map DB 25 Fig.3 (a) is a figure which shows an example of the navigation screen 12b, FIG.3 (b) is a schematic diagram of the navigation screen 12b. Figure showing an example of a hazard map FIG. 5 (a) is a diagram showing an example of the composite screen 12c, and FIG. 5 (b) is a schematic diagram of the composite screen 12c. Flow chart showing update processing of hazard map DB 25 by server 2 In the flowchart showing the emergency response processing by the server 2 Flow chart showing the operation of the in-vehicle device 1 in the first embodiment A figure showing an example of hazard map DB25A in modification 3 System configuration diagram of hazard map display system S2 in the second embodiment Flow chart showing operation of in-vehicle device 1A in the second embodiment

-First embodiment-
Hereinafter, a first embodiment of the in-vehicle apparatus will be described with reference to FIGS. 1 to 8.

(Constitution)
FIG. 1 is a system configuration diagram of a hazard map display system S including an in-vehicle device 1. The hazard map display system S includes an in-vehicle device 1, a server 2, a hazard map distribution device 3, and a disaster center 4. The server 2 can communicate with the in-vehicle device 1, the hazard map distribution device 3, and the disaster center 4. These communications may be performed via a communication network, such as the Internet, or may be performed via a real leased line or a virtual leased line. Although only one in-vehicle apparatus 1 is shown in FIG. 1, a plurality of in-vehicle apparatuses 1 may exist. Hereinafter, a vehicle on which the in-vehicle device 1 is mounted will be referred to as "own vehicle".

  The in-vehicle device 1 is an arithmetic device mounted on a host vehicle, such as a car navigation device. The in-vehicle apparatus 1 includes a navigation unit 11, a display unit 12, a display control unit 12a, an image combining unit 13, a position acquisition unit 14, an in-vehicle communication unit 15, and a navigation map DB 16. The navigation unit 11, the display control unit 12a, and the image combining unit 13 are realized by a CPU (not shown) developing a program stored in a ROM (not shown) in a RAM (not shown).

  The navigation unit 11 refers to the navigation map DB 16 to calculate a traveling route from the current position to the destination, and displays the calculated traveling route and the vicinity of the current position on the display unit 12. Specifically, the navigation unit 11 acquires, from the navigation map DB 16, information on roads within a predetermined distance centering on the position of the vehicle acquired by the position acquisition unit 14 (hereinafter referred to as “vehicle position”), and the navigation map The information is output to the display control unit 12a as information. At this time, the navigation unit 11 also displays a symbol indicating the vehicle position and the traveling direction, for example, a triangle having an acute traveling direction. Further, the navigation map information can be automatically scaled or rotated according to the user's input operation via an input unit (not shown) or as needed. Furthermore, it is also possible to shift the center position of the navigation map information from the vehicle position according to the input operation of the user. The navigation unit 11 holds, as display area information, information of an area to be displayed on the display unit 12, for example, the latitude and longitude of the upper left and lower right displayed on the display unit 12. In the present embodiment, latitude and longitude are collectively referred to as "world coordinates".

  The display unit 12 is, for example, a liquid crystal display, and displays an image based on a control signal output from the display control unit 12a. Although the display unit 12 is included in the in-vehicle apparatus 1 in FIG. 1, the display unit 12 may be provided outside the in-vehicle apparatus 1. The display control unit 12 a outputs a video signal to the display unit 12 based on the operation command of the navigation unit 11 and the image combining unit 13.

  The image combining unit 13 combines the navigation map information output by the navigation unit 11 with the image of the hazard map and outputs the combined image to the display control unit 12a. However, the image combining unit 13 performs rotation or enlargement / reduction on the hazard map based on the display area information. Details will be described later. The position acquisition unit 14 receives radio waves from a plurality of satellites constituting the satellite navigation system, and analyzes the signals contained in the radio waves to calculate the vehicle position, that is, the latitude and the longitude. The in-vehicle communication unit 15 communicates with the server 2 by wireless communication. The in-vehicle communication unit 15 may include a wireless communication device capable of directly communicating with the server 2 or an external device that performs wireless communication with the server 2, for example, a short distance wired or wireless communication device communicating with a portable terminal. May be provided. The navigation map DB 16 is a database in which map information used by the navigation unit 11 is stored. Information on world coordinates is added to the map information stored in the navigation map DB 16.

  The server 2 includes a server communication unit 21, a hazard map acquisition unit 22, a reference point generation unit 23, a shape map DB 24, and a hazard map DB 25. The server communication unit 21 communicates with the in-vehicle device 1, the hazard map distribution device 3, and the disaster center 4. The hazard map acquisition unit 22 acquires a hazard map from the hazard map distribution device 3 and stores the hazard map in the hazard map DB 25. The reference point generation unit 23 generates a reference point in the hazard map acquired by the hazard map acquisition unit 22 and stores information on the reference point in the hazard map DB 25.

  The shape map DB 24 is a database provided in advance in the server 2 and stores the map as image information, that is, raster data. However, the map may be stored as vector data, and rasterization may be possible. Below, the image stored in shape map DB24 is called a "shape map image." The world coordinates of any point in the shape map image are known. Since the shape map image is a raster format as with the hazard map, the correspondence relationship between the two can be calculated by a known method such as shape matching. The hazard map DB 25 is a database including the hazard map acquired from the hazard map distribution device 3. The configuration of the hazard map DB 25 will be described later.

  The hazard map distribution device 3 is a device that stores hazard maps for each type of disaster, for each municipality. For example, the hazard map distribution device 3 stores a hazard map for earthquakes for a target area of A prefecture city X created by the municipality A, a hazard map for floods, and a hazard map for tsunamis. Furthermore, the hazard map distribution device 3 also stores hazard maps having different target areas created by other local governments. The hazard map distribution device 3 provides a hazard map in response to an external request. However, hazard maps are created on the assumption that humans can read and understand them, and metadata such as latitude and longitude are not added.

  When the disaster center 4 collects meteorological information and detects an increase in the risk of occurrence of a disaster, it notifies the server 2 of the type of disaster that may occur and the target area thereof. The disaster center 4 notifies, for example, the server 2 that there is a risk of flooding in A city X.

(Hazard map DB 25)
FIG. 2 is a diagram showing an example of the hazard map DB 25. As shown in FIG. The hazard map DB 25 is composed of a plurality of records, and each record has fields of local government, target area, disaster, acquired URI, update date, first reference point, second reference point, and map information. Among these fields, the values of the local government, target area, disaster, and acquired URI fields are stored in advance in the hazard map DB 25. The update date and the value of the field of map information are obtained from the outside. The values of the fields of the first reference point and the second reference point are generated by the server 2. The information stored in each field will be described below. Hereinafter, the values of the fields of the first reference point and the second reference point will be collectively referred to as “reference point information”.

  The municipality field stores the name of the municipality that issues the hazard map stored in the record. In the field of the target area, the name of the area included in the hazard map stored in the record is stored. The disaster field stores the type of disaster targeted by the hazard map stored in the record. In the field of acquired URI, a URI (Uniform Resource Identifier) to which the hazard map stored in the record is published is stored. In the present embodiment, the updated hazard map can also be acquired from the same URI. This URI is, for example, "http://www.example.com/area_A/hazard/eq.jpg" indicating the communication protocol, the server where the hazard map is stored, and the storage position in the server. The update date field stores the update date of the hazard map stored in the record. The hazard map update date can be acquired, for example, as attribute information of a file that is a hazard map.

  The field of the first reference point stores information of the first reference point of the hazard map stored in the record. The first reference point is composed of image coordinates and world coordinates. Image coordinates are coordinates in a hazard map that is an image. The field of image coordinates stores coordinates on the hazard map, and the field of world coordinates stores world coordinates corresponding to the image coordinates. For example, when the hazard map has a resolution of 1280 × 1024, the image coordinates take values of (1, 1) to (1280, 1024). The field of the second reference point stores information on the second reference point of the hazard map stored in the record. The configuration of the second reference point is similar to that of the first reference point. However, the coordinates of the second reference point are necessarily different from the first reference point. The positions of the first and second reference points should be separated. In the field of map information, information of hazard map itself stored in the record, for example, JPG file, GIF file, PDF file, etc. is stored.

(Navigation screen)
FIG. 3 is a view showing an example of screen display by the navigation unit 11. Fig.3 (a) is a figure which shows an example of the navigation screen 12b displayed on the display part 12, and FIG.3 (b) is a schematic diagram of the navigation screen 12b. As shown in FIG. 3A, the navigation screen 12b displays a triangular vehicle mark T, a grid-like road around the vehicle, a building B, and a topography. Moreover, it is shown that the illustrated upper part is north by the azimuth symbol shown by code | symbol D1. In FIG. 3A, the upper right area is the sea, and a road extending in the horizontal direction in the drawing reaches the sea. This navigation screen 12b is created by superimposing the vehicle layer L1 and the navigation map layer L2 as shown in FIG. 3B, and the vehicle layer L1 is higher than the navigation map layer L2, in other words, it is the near side Layered on the side. The direction symbol D1 may be included in the vehicle layer L1 or in the navigation map layer L2.

(Hazard map)
FIG. 4 is a diagram showing an example of the hazard map corresponding to the flood of the local government A, which is stored in the hazard map distribution device 3. As shown in FIG. The hazard map is described so as to be easily understood by humans, for example, "xx sea" is shown at the upper left. In addition, it is shown that the left side of the illustration is the north by the azimuth symbol indicated by the reference D2. In this hazard map, the road does not reach the sea at the top of the figure. Moreover, in the example shown in FIG. 4, the oval area of the code | symbol K1-K4 shown by hatching is an area | region where a flood is estimated. Although it is desirable to extract only the area indicated by the hatching and add it to the navigation if possible, the method of describing the hazard map is various and it is difficult to cope with all of them in advance. Therefore, as described below, the image information of the hazard map is used as it is for display.

(Composition screen 12c)
FIG. 5 is a view showing an example of screen display by the image combining unit 13. FIG. 5A is a view showing an example of the composite screen 12c displayed on the display unit 12, and FIG. 5B is a schematic view of the composite screen 12c. The composite screen 12c is shown to have the upper part in the same way as the navigation screen 12b of FIG. 3 as the azimuth symbol D1 indicates. Then, in the composite screen 12c, as in the case of FIG. 4, the area where the flood is estimated is indicated by a hatched oval. That is, the hazard map shown in FIG. 4 is displayed on the combined screen 12c in accordance with the direction and scale of the navigation screen 12b. Similar to the navigation screen 12b, a triangular vehicle mark T is displayed on the composite screen 12c. However, on the combined screen 12c, the grid-like road that has been displayed is hardly displayed on the navigation screen 12b, and is displayed slightly near the sea on the right side of the figure.

  As shown in FIG. 5B, the composite screen 12c is created by superposing the three layers with the hazard layer L3 interposed between the vehicle layer L1 and the navigation map layer L2. In other words, the composite screen 12c is created by overlapping the navigation map layer L2, the hazard layer L3, and the vehicle layer L1 in order from the bottom. The navigation map layer L2 rotates and scales, ie, scales, the hazard map according to the orientation shown in the upper portion of the navigation map layer L2 and the range displayed on the map layer L2, ie, the range indicated by the display area information. Is done. Therefore, when the display on the display unit 12 is switched from the navigation screen 12b to the composite image 12c, the user can easily grasp the information described in the hazard map.

  Further, since the navigation map layer L2 is disposed under the hazard layer L3, the information of the navigation map DB 16 can be displayed even when the area displayed on the display unit 12 exceeds the area described in the hazard map. That is, in the area OL indicated by the dashed triangle on the right side in FIG. 5A, the thickness of the line indicated by the road is largely different, the thick road is by the hazard map, and the thin road is by the navigation map DB16. .

(Reference point calculation process)
The operation of the reference point generation unit 23 of the server 2 will be described. The server 2 first refers to the hazard map DB 25 to identify the target area of the acquired hazard map. Next, the server 2 acquires a shape map image of the specified target area from the shape map DB 24. As mentioned above, the world coordinates of any point in the shape map image are known. Then, the server 2 specifies the correspondence between the acquired hazard map and the shape map image. Although various methods can be used to identify the correspondence, for example, rough correspondences are clarified using a map drawn relatively large on the map, such as coastlines, rivers, and highways. Then, the detailed correspondence relationship is clarified using the position of the center of gravity of the land having a characteristic shape and the position of the intersection where the roads intersect.

  Next, the server 2 sets two points at different positions in the acquired hazard map, for example, two arbitrary points such as the upper left corner and the lower right corner as the first reference point and the second reference point, and image coordinates in those hazard maps Are written to hazard map DB 25. Further, since the server 2 has already clarified the detailed correspondence between the acquired hazard map and the shape map image, the position on the shape map image corresponding to the first reference point and the second reference point in the acquired hazard map Can be calculated. Since world coordinates, ie, latitude and longitude, are known for any point on the shape map image, the server 2 can also calculate world coordinates of the first reference point and the second reference point. The server 2 also writes the world coordinates of the calculated first and second reference points in the hazard map DB 25.

(Update process of hazard map DB 25)
FIG. 6 is a flowchart showing the process of updating the hazard map DB 25 by the server 2. The server 2 executes the process shown in FIG. 6 every predetermined long time, for example, every 24 hours or every week. The server 2 first sets the processing target to the top record of the hazard map DB 25 in S311. In S312, the server 2 accesses the acquisition URI of the record to be processed and confirms the update date of the hazard map. In the subsequent S313, the server 2 determines whether a new version of the hazard map exists, in other words, whether the update date is newer than the hazard map already acquired. If the server 2 determines that a new version exists, the process proceeds to S314, and if it determines that a new version does not exist, the process proceeds to S318.

  In S314, the server 2 acquires the hazard map stored in the acquired URI, in other words, downloads it and stores it in the field of map information. In the subsequent S315 and S316, the server 2 uses the reference point generation unit 23 to calculate the first reference point and the second reference point. The calculation method is as described above. In the subsequent S317, the server 2 updates the update date, the first reference point, and the second reference point in the record to be processed in the hazard map DB 25. In the subsequent S318, the server 2 determines whether the processing target is the last record of the hazard map DB 25 or not. If it is determined that the record is not the last record, the server 2 changes the process target to the next line and returns to S312. If the server 2 determines that the processing target is the last row, the processing illustrated in FIG. 6 ends.

(Emergency response process)
FIG. 7 is a flowchart showing the emergency response process by the server 2. The server 2 executes the process shown in FIG. 7 every predetermined short time, for example, every 10 seconds or every 5 minutes. The server 2 first determines in S <b> 321 whether or not disaster information has been received from the disaster center 4. The disaster information includes the target area and the type of disaster, and includes, for example, information that "flood warning has been issued in A city of X prefecture". If it is determined that the disaster information is received, the process proceeds to S322. If it is determined that the disaster information is not received, the process illustrated in FIG. 7 is ended. In S322, the server 2 notifies all the on-vehicle devices 1 of the occurrence of a disaster. In the subsequent S323, the server 2 receives the position information from each of the in-vehicle devices 1. The server 2 determines whether the received position information is within the area indicated in the disaster information. The server 2 transmits the hazard map and the reference point information to the in-vehicle device 1 that has transmitted the position information that is determined to be in the area (S325), and transmits to the in-vehicle device that has transmitted the position information that is determined to be out of the area The process shown in FIG. 7 ends without sending any information.

(Operation of in-vehicle device 1)
FIG. 8 is a flowchart showing the operation of the in-vehicle apparatus 1. The in-vehicle device 1 always executes the process shown in FIG. 8 when it is activated. However, when receiving the power-off command, the in-vehicle device 1 ends the operation regardless of which process is being performed. The in-vehicle device 1 first performs display on the display unit 12 using the normal map, that is, the map information stored in the navigation map DB 16 in S331. In the subsequent S332, the in-vehicle device 1 determines whether or not notification of disaster information has been received from the server 2. If the in-vehicle apparatus 1 determines that the notification of the disaster information has been received, the process proceeds to step S333. If the in-vehicle apparatus 1 determines that the notification of the disaster information is not received, the process returns to step S331.

  In S333, the in-vehicle device 1 transmits the vehicle position acquired by the position acquisition unit 14 to the server 2. In the subsequent S334, the in-vehicle device 1 determines whether the hazard map and the reference point information have been received from the server 2. If it is determined that the in-vehicle apparatus 1 has received it, the process proceeds to S335, and if it is determined that the in-vehicle apparatus 1 has not received it, the process returns to S331. In S335, the in-vehicle device 1 performs rotation and scale conversion of the received hazard map based on the reference point information and the display area information of the display unit 12. In the subsequent S336, the in-vehicle device 1 superimposes and displays the hazard map subjected to the rotation and scale conversion in S335 on the normal map. In S 337, the in-vehicle device 1 determines whether a release signal has been received from the server 2. When it is determined that the release signal has been received, the in-vehicle device 1 returns to S331, and when it is determined that the release signal is not received, the processing returns to S336.

According to the first embodiment described above, the following effects can be obtained.
(1) The in-vehicle device 1 is mounted on a vehicle. The position acquisition unit 14 that calculates the position of the vehicle, the display control unit 12a that controls the video signal of the image displayed on the display unit 12, the navigation map DB 16 that stores information about the map, and the vehicle acquired by the position acquisition unit 14 The navigation unit 11 outputs navigation map information generated using the vehicle position and the map stored in the navigation map DB 16 to the display control unit 12a, the information on the hazard map, and the information on the position of the hazard map Image that outputs hazard map to display control unit 12a by rotating or expanding or reducing to match the direction and range in navigation map information based on the in-vehicle communication unit 15 that receives the reference point information and the reference point information And a combining unit 13. Therefore, the in-vehicle device 1 can appropriately display the hazard map on the display unit 12 on which the navigation map information is displayed. Specifically, since the hazard map displayed on the display unit 12 has the same direction and range as the navigation map information, the user can easily grasp the position in the hazard map displayed on the display unit 12.

(2) The reference point information is an association between image coordinates and world coordinates in two sets of hazard maps. World coordinates, ie, latitude and longitude, are widely used in map information, so that the hazard map can be easily adapted to navigation map information with high versatility.

(3) The image combining unit 13 superimposes the hazard map on the navigation map information, and further superimposes a symbol indicating the vehicle position on the display unit 12. Therefore, since the symbol indicating the vehicle position is superimposed on the hazard map and displayed, the user can easily grasp the vehicle position on the hazard map.

(4) The hazard map display system S includes the in-vehicle device 1 and the server 2. The server 2 includes a hazard map acquisition unit 22 that acquires a hazard map that is an image, a reference point generation unit 23 that generates a plurality of position information in the acquired hazard map, and a server communication unit that transmits the hazard map and the reference point information And 21.

(5) When the server communication unit 21 receives information on a disaster, the server communication unit 21 transmits to the in-vehicle apparatus 1 a hazard map which is a hazard map acquired in advance and corresponds to the type of the received disaster. Since the server 2 acquires the hazard map in advance, it can transmit the hazard map to the in-vehicle device 1 promptly when notified from the disaster center 4. If the server 2 receives a notification from the disaster center 4 and then acquires a hazard map, there are the following two problems. That is, first, access to the hazard map distribution device 3 is concentrated, and it may take time to acquire the hazard map. And secondly, it takes a processing time that can not be ignored to search for the first reference point and the second reference point. However, as described above, since the server 2 acquires the hazard map in advance, the first reference point and the second reference point can also be searched in advance, and the in-vehicle device 1 can be promptly notified when receiving a notification from the disaster center 4 Can send hazard maps to

(Modification 1)
In the first embodiment described above, the in-vehicle device 1 transmits the vehicle position to the server 2 when the emergency information is received. However, the user may voluntarily transmit the vehicle position and the desired hazard map type to the server 2. In this case, the server 2 selects the hazard map based on the transmitted vehicle position and the type of hazard map, and transmits the selected hazard map to the in-vehicle device 1. For example, a user who cares about continuing rain while traveling in a mountain area can acquire a landslide hazard map.

(Modification 2)
In S337 of FIG. 8, the in-vehicle apparatus 1 determines whether the release signal has been received from the server 2 or not. However, instead of the determination of S 337, the in-vehicle device 1 may determine whether or not a forced release instruction by the user has been input.

(Modification 3)
In the first embodiment described above, the first and second reference points are a combination of image coordinates and world coordinates. However, the first reference point and the second reference point may be a combination of image coordinates and landmarks such as POI (Point of interest). As for the landmark in this modification, it is desirable that the shape on a map is not similar with others. For example, landmarks having a good shape are preferable to rectangular landmarks regularly arranged in a lattice. In the landmark, the position of the center of gravity in the planar map is used instead of the world coordinates.

  FIG. 9 is a diagram showing an example of the hazard map DB 25A in the present modification. The difference between the hazard map DB 25A and the hazard map DB 25 in the first embodiment is that the "world coordinates" of the first and second reference points are changed to "world coordinates and landmarks". . That is, in the hazard map DB 25A, landmarks can be used instead of world coordinates. For example, in the first record shown in FIG. 9, the first reference point is "AAA amusement park" and the second reference point is "BBB baseball stadium". As shown in the second record, the first reference point may be expressed in world coordinates, and the second reference point may be expressed in landmarks.

According to the third modification, the following effects can be obtained.
(6) The reference point information is a combination of image coordinates and landmarks in two sets of hazard maps. Therefore, the hazard map can be displayed according to the navigation map information without using the world coordinates.

(Modification 4)
In the first embodiment described above, information of image coordinates is included in each reference point of the hazard map DB 25. However, when the image coordinates are predetermined, the hazard map DB 25 may not include the information of the image coordinates. The predetermined image coordinates are, for example, a combination of the first reference point (1, 1) and the second reference point (1280, 1024), or a combination of the first reference point (1, 1024) and the second reference point (1280, 1). It is a combination.

(Modification 5)
In the first embodiment described above, only one hazard map distribution device 3 is included in the hazard map display system S. However, the hazard map may be stored in the hazard map distribution device 3 different for each municipality, and the hazard map display system S may include a plurality of hazard map distribution devices 3.

(Modification 6)
The in-vehicle device 1 may be a device that can be used even when not mounted on a vehicle. For example, the in-vehicle device 1 may be a portable electronic device, that is, a smart phone, a tablet terminal, or a notebook personal computer.

-Second embodiment-
A second embodiment of the hazard map display system will be described with reference to FIGS. 10 to 11. In the following description, the same components as in the first embodiment will be assigned the same reference numerals and differences will be mainly described. The points that are not particularly described are the same as in the first embodiment. The present embodiment is different from the first embodiment mainly in that the in-vehicle apparatus also has a server function.

(Constitution)
FIG. 10 is a system configuration diagram of a hazard map display system S2 in the second embodiment. The in-vehicle apparatus 1A according to the second embodiment further includes a hazard map acquisition unit 22, a reference point generation unit 23, a shape map DB 24, and a hazard map DB 25 in addition to the configuration according to the first embodiment. The in-vehicle communication unit 15 communicates with the hazard map distribution device 3 and the disaster center 4. The operations of the hazard map acquisition unit 22 and the reference point generation unit 23 and the configurations of the shape map DB 24 and the hazard map DB 25 are the same as those in the first embodiment, and thus the description thereof is omitted.

(Operation of in-vehicle device 1A)
FIG. 11 is a flowchart showing the operation of the in-vehicle apparatus 1A. That is, in-vehicle device 1A performs the operation shown in the flowchart shown in FIG. 11 in place of the flowchart shown in FIG. 8 in the first embodiment. The differences between the flowchart shown in FIG. 8 will be mainly described below. The on-vehicle apparatus 1A executes S321 of FIG. 7 after S331, and proceeds to S324 when making a positive determination, and returns to S331 when making a negative determination. In S324, the in-vehicle apparatus 1A determines whether the position of the in-vehicle apparatus 1A is inside the disaster area. If the in-vehicle apparatus 1A makes an affirmative determination, it proceeds to S335, and if it makes a negative determination, it returns to S331. Since S335 and subsequent steps are the same as in the first embodiment, the description will be omitted.

According to the second embodiment described above, the following effects can be obtained.
(7) The in-vehicle apparatus 1A includes a hazard map acquisition unit 22 that acquires a hazard map that is an image, a reference point generation unit 23 that generates reference point information that is information related to a position in the acquired hazard map, and a vehicle position. A position acquisition unit 14 that acquires a certain vehicle position, a display unit 12 that displays a navigation image that is information on a road around the vehicle, and a hazard that matches the direction and range in navigation map information based on reference point information And an image combining unit that rotates and scales the map and displays the map on the display unit. Therefore, the in-vehicle apparatus 1A can appropriately display the hazard map on the display unit 12 even when the server 2 does not function.

Although the program is stored in the ROM (not shown), the program may be stored in the non-volatile memory 18. Further, the ECU 1 may include an input / output interface (not shown), and the program may be read from another device via the input / output interface and a medium that can be used by the ECU 1 when necessary. Here, the medium refers to, for example, a storage medium removable from the input / output interface or a communication medium, that is, a wired, wireless, light or other network, or a carrier wave or digital signal propagating through the network. Also, some or all of the functions implemented by the program may be implemented by a hardware circuit or an FPGA.
Each embodiment and modification mentioned above may be combined respectively.
Although various embodiments and modifications have been described above, the present invention is not limited to these contents. Other embodiments considered within the scope of the technical idea of the present invention are also included within the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 ... in-vehicle apparatus 2 ... server 3 ... hazard map distribution apparatus 4 ... disaster center 11 ... navigation unit 12 ... display unit 13 ... image combining unit 14 ... position acquisition unit 15 ... in-vehicle communication unit 18 ... nonvolatile memory 21 ... server communication unit 22: Hazard map acquisition unit 23: Reference point generation unit

Claims (7)

An on-vehicle device mounted on a vehicle,
A position calculation unit that calculates the position of the vehicle;
A display control unit that controls a video signal of a video to be displayed on the display device;
A map information storage unit that stores information on a map;
A navigation unit that outputs navigation map information generated using the vehicle position calculated by the position calculation unit and information about a map stored in the map information storage unit to the display control unit;
An on-vehicle communication unit that receives information on a hazard map and reference point information that is information on the position of the hazard map;
And an image combining unit configured to rotate or enlarge or reduce the size to match the direction and range in the navigation map information based on the reference point information and output the hazard map to the display control unit. In the in-vehicle apparatus according to claim 1,
The reference point information is an on-vehicle device in which two sets of image coordinates and world coordinates in the hazard map are associated with each other. In the in-vehicle apparatus according to claim 1,
The reference point information is a combination of image coordinates in the hazard map and a landmark in two sets. The in-vehicle apparatus according to any one of claims 1 to 3.
The image combining unit superimposes the hazard map on the navigation map information, and further superimposes a symbol indicating the position of the vehicle and outputs the superimposed symbol to the display control unit. A hazard map display system comprising a server and the in-vehicle device according to any one of claims 1 to 4, comprising:
The server is
A hazard map acquisition unit for acquiring the hazard map;
A reference point generation unit that generates the reference point information in the acquired hazard map;
A hazard map display system comprising: a server communication unit that transmits the hazard map and the reference point information. In the hazard map display system according to claim 5,
When the server communication unit receives information on a disaster, the hazard map display system transmits the hazard map according to the type of the received hazard map and the reference point information to the in-vehicle device when the hazard map is acquired in advance . An on-vehicle device mounted on a vehicle,
A position calculation unit that calculates the position of the vehicle;
Hazard map acquisition unit that acquires information on hazard maps,
A display control unit that controls a video signal of a video to be displayed on the display device;
A map information storage unit that stores information on a map;
A navigation unit that outputs navigation map information generated using the vehicle position calculated by the position calculation unit and information about a map stored in the map information storage unit to the display control unit;
A reference point generation unit that generates reference point information that is information related to a position in the acquired hazard map;
And an image combining unit configured to rotate or enlarge or reduce the size to match the direction and range in the navigation map information based on the reference point information and output the hazard map to the display control unit.

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