Navigation device and data generator used therefor

Abstract

To provide a navigation device equipped with functions that make it easy for a driver to park the vehicle being driven and introduce an easily accessible facility to the driver.SOLUTION: A map data preservation unit of the navigation device according to the present invention preserves links and nodes defining a road and road data incidental to the road, and a facility data preservation unit preserves facility location data defining the location of a facility and facility attribute data for identifying the attribute of the facility. A control unit is provided with a first display control unit, and the first display control unit displays a road map on a display unit on the basis of map data in accordance with prescribed display rules. Moreover, in a navigation device for displaying a facility on a display unit on the basis of the facility data, the facility data preservation unit further includes, for each facility, access easiness data pertaining to the easiness of access from a road to the facility, and the control unit is provided with a second display control unit, the second display control unit referring to the access easiness data and giving a change to a facility display mode on the display unit.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a navigation device and a data generation device used therefor.

Background Art

[0002] When a driver wants to stop by a convenience store, a fast food restaurant, etc. while moving by car, the driver tends to prefer roadside stores. This is because it is easy to access from the road being traveled. However, even if it is installed on the roadside, in the case of a large facility such as a shopping mall, the passage from the road to the parking lot may be long and it may take time to find a parking space.

[0003] For example, when searching for a convenience store in the surrounding search mode, there was a difference in the ease of access from the road between a store located independently on the roadside and a store located inside a large facility. For the driver, it is desired to introduce facilities where the car being driven can be easily parked, that is, facilities with easy access. As prior art documents related to the present invention, refer to Patent Documents 1 to 3.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0005] The first aspect of the present invention for solving the above problems is defined as follows. That is, A navigation device including a map data storage unit, a facility data storage unit, a display unit, and a control unit, wherein the map data storage unit stores links and nodes defining roads and road data attached to the roads, the facility data storage unit stores facility position data defining the positions of facilities and facility attribute data specifying the attributes of the facilities, the control unit includes a first display control unit, and the first display control unit displays a road map on the display unit based on the map data and displays facilities on the display unit based on the facility data according to a predetermined display rule, in the navigation device, the facility data storage unit further includes access ease data regarding the ease of access from the road to each facility, the control unit includes a second display control unit, and the second display control unit refers to the access ease data and changes the display mode of the facilities on the display unit, the navigation device.

[0006] According to the navigation device defined in the first aspect thus defined, based on the access ease data associated with each facility, a change is given to the display mode of the facility, so that the driver can refer to the display mode of the guided facility and select the facility to stop at. As a change in the display mode, the display of the corresponding facility can be emphasized. When listing the facilities, the order of display in the list can be changed (fifth aspect).

[0007] The second aspect of the present invention is defined as follows. That is, In the navigation device defined in the first aspect, when a plurality of facilities are displayed on the display unit by the first display control unit according to the predetermined display rule, the second display control unit changes the display mode of the facilities. When there is only one candidate facility to stop at displayed on the navigation display unit, since there are no other options for the driver, whether it is easy to access the facility from the road hardly becomes a problem. On the other hand, when there are a plurality of candidate facilities to stop at displayed on the navigation display unit, it is preferable to change the display mode of each facility and visually provide the driver with the ease of access to the facility.

[0008] Such a function is also achieved when an area and the attributes of a facility are specified by the destination specifying unit and there are a plurality of facilities in the area (Sixth aspect). In addition, such a function is also achieved when the vehicle is moving (Third aspect) and when there are a plurality of facilities within a predetermined area in the traveling direction of the vehicle (Fourth aspect). Thereby, it is possible to support the driver's selection of a facility.

[0009] The seventh aspect of the present invention is defined as follows. That is, In the apparatus defined in the first aspect, the ease of access data includes first ease of access data derived from the name of the facility, second ease of access data derived from vehicle travel data, or comprehensive data thereof, When the ease of access data is higher than a predetermined threshold, the second display control unit highlights the facility on the display unit, or when the ease of access data is lower than a predetermined threshold, the second display control unit stops displaying the facility on the display unit.

[0010] According to the navigation apparatus defined in the seventh aspect defined as above, predetermined ease of access data (data derived from the facility name and / or data derived from vehicle travel data) is used as the ease of access data of the facility, and the ease of access data is sorted based on a predetermined threshold to control the display mode of the facility. By clarifying the origin of the ease of access data, the data can be made reliable. In addition, by providing a threshold value, the change in the display mode can be clarified.

[0011] The first access ease data defined in the seventh aspect is generated by the following data generation device (eighth aspect). Facility data stored in the facility data storage unit of the navigation device, which is a data generation device that generates access ease data regarding the ease of access from the road to the facility for each facility, A facility name analysis unit that analyzes the name of the facility according to a predetermined rule, Based on the analysis result of the facility name analysis unit, a first data specifying unit that specifies first access ease data for each facility, A data generation device comprising a first data storage unit that stores the specified first access ease data.

[0012] The second access ease data defined in the seventh aspect is generated by the following data generation device (ninth aspect). Facility data stored in the facility data storage unit of the navigation device, which is a data generation device that generates access ease data regarding the ease of access from the road to the facility for each facility, A vehicle travel history acquisition unit that acquires the vehicle travel history from when the vehicle enters the parking lot of the facility from the road until the engine stops, A first extraction unit that extracts a first analysis target from the acquired vehicle travel history, A second extraction unit that extracts a second analysis target from the acquired vehicle travel history, A second data specifying unit that calculates the extraction result of the first extraction unit and the extraction result of the second extraction unit to specify second access ease data for each facility, A data generation device comprising a second data storage unit that stores the specified second access ease data. As defined in this ninth aspect, by using a plurality of vehicle travel histories as analysis targets, reliability can be obtained for the second access ease data.

[0013] In the data generation device defined in the ninth aspect, after entering the parking lot of the facility from the road, the vehicle driving history until the engine stops was acquired. However, after entering the parking lot of the facility from the road, the vehicle driving history until leaving the parking lot can also be acquired and used (eleventh aspect).

[0014] The tenth aspect of this invention is defined as follows. That is, In the data generation device defined in the ninth aspect, the second data analysis unit specifies second access ease data based on the operation amount of the first analysis target and the operation amount of the second analysis target. As defined in this tenth aspect, for operation targets where the operation amount can be directly calculated, there are the number of times the steering wheel is rotated by a predetermined angle or more, the number of times the reverse gear is engaged, the number of times the turn signal is operated, the number of times the brake is operated, the number of times the hazard lamp is operated, etc. Analyzing these is easy and does not impose a burden on the second data analysis unit.

[0015] Also, the amount of each analysis target can be converted into a numerical value, and the sum or average of the obtained numerical values can be obtained. For example, for the moving amount in the parking lot, 10 - 30 m is "5", 31 - 50 m is "4", 51 - 70 m is "3", 71 - 100 is "2", 101 - 150 m is "1", and 151 m or more is "0". On the other hand, the number of times the steering wheel is rotated by a predetermined angle or more is "5" for 1 - 3 times, "4" for 4 - 5 times, "3" for 6 - 7 times, "2" for 8 - 9 times, "1" for 10 - 11 times, and "0" for 12 or more times. Then, the sum or average value of such numerical values is calculated.

[0016] The twelfth aspect of this invention is a navigation method using the navigation device of the first aspect, and is defined as follows. A navigation device including a map data storage unit, a facility data storage unit, a display unit, and a control unit, wherein the map data storage unit stores links and nodes defining roads and road data attached to the roads the facility data storage unit stores facility position data defining the positions of facilities and facility attribute data specifying the attributes of the facilities, The control unit includes a first display control unit. The first display control unit uses a navigation device that displays a road map on the display unit based on the map data and displays facilities on the display unit based on the facility data according to a predetermined display rule. A navigation method, wherein the facility data storage unit is caused to store access easiness data, the second display control unit of the control unit is caused to refer to the access easiness data, thereby changing the display mode of the facility on the display unit. A navigation method.

[0017] A 13th aspect of the present invention is a computer program for causing a computer of the navigation device defined in the 1st aspect to execute the navigation method of the 12th aspect, which is defined as follows. A navigation device including a map data storage unit, a facility data storage unit, a display unit, and a control unit, wherein the map data storage unit stores links and nodes defining roads and road data attached to the roads the facility data storage unit stores facility position data defining the positions of facilities and facility attribute data specifying the attributes of the facilities, the control unit includes a first display control unit. The first display control unit is a program for a computer of a navigation device that displays a road map on the display unit based on the map data and displays facilities on the display unit based on the facility data according to a predetermined display rule, access easiness data is stored in the facility data storage unit, a program for a computer that causes the second display control unit of the control unit to refer to the access easiness data, thereby changing the display mode of the facility on the display unit.

Brief Description of Drawings

[0018]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Mode for Carrying Out the Invention

[0019] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the navigation device of the present invention, access easiness data is associated in advance with a facility to be guided, and based on this access easiness data, a change is given to the guidance mode of the facility to be guided. First, with reference to FIG. 1, the data generation device 1 for generating access easiness data will be described. This data generation device 1 includes a facility name data storage unit 3, a travel history data storage unit 5, and a data generation unit 7. The facility name data storage unit 3 stores the names of facilities stored in the facility data storage unit of the navigation device.

[0020] The travel history data storage unit 5 stores the travel history data of the vehicle (probe car). Here, the travel history data refers to probe data (position data, time data) generally obtained from the probe car, as well as the vehicle inner data of the probe car. Here, the vehicle inner data is data regarding various states of the vehicle output from sensors, control units, etc. provided in the vehicle, and is data that can be transmitted by various communication protocols including CAN (Controller Area Network) on the network mounted on the vehicle. This vehicle inner data includes travel speed data, acceleration data, brake operation data, steering angle data of the steering wheel, and other data.

[0021] The data generation unit 7 is provided with an area 10 for processing facility name data and an area 20 for processing travel history data. The facility name data processing area 10 is provided with a facility name analysis unit 11 and a first data storage unit 15.

[0022] The facility name analysis unit 11 analyzes the text data of the facility name stored in the facility name data storage unit 3 according to a predetermined rule to identify the first access ease data. As the predetermined rule, for example, when a specific term (such as "street", "ring road", "Line 〇") suggesting a road is included in the name of the facility, it is considered that the access is easy, and the first access ease data is specified as a high value. On the other hand, for example, when a specific term (such as "〇〇 Mall", "supermarket", "home center") suggesting a large-scale facility is included in the facility name, it is considered that the access is not easy, and the first access ease data is specified as a low value.

[0023] In addition, when address data is assigned to a facility and the facility name analysis unit includes a roadside address storage unit (not shown) that stores roadside address data, it is possible to determine whether the facility is a so-called roadside store by comparing the address data of the facility with the roadside address data. That is, when the address data of the facility matches the roadside address data, the first access ease data has a high value on the assumption that access is easy, and when the address data of the facility does not match the roadside address data, the first access ease data has a low value on the assumption that access is not easy. The specified first access ease data is stored in the first data storage unit 15 in association with the facility. The first access ease data stored in the first data storage unit 15 is supplied to the facility data storage unit 40 of the navigation device.

[0024] The driving history data processing area 20 is provided with a first extraction unit 21, a second extraction unit 22, a second data analysis unit 23, and a second data storage unit 25. The first extraction unit 21 and the second extraction unit 22 each extract driving history data to be a predetermined analysis target from the driving history data in the driving history data storage unit 5. For example, the first extraction unit 21 can extract the driving distance from the road to entering the facility's parking lot and stopping as the first analysis target, and the second extraction unit 22 can extract the number of times the steering wheel is rotated by a predetermined angle or more from the road to entering the facility's parking lot and stopping as the second analysis target.

[0025] The second data analysis unit 23 specifies the access ease data as a high value on the assumption that access is easy when the driving distance, which is the first analysis target sent from the first extraction unit 21, is short, and specifies the access ease data as a high value on the assumption that access is easy when the number of rotations of the steering wheel, which is the second analysis target sent from the second extraction unit 22, is small.

[0026] The second data analysis unit 23 quantifies the access ease data specified for the first and second analysis targets in the same format and combines them to obtain second access ease data. When generating the second access ease data, the result obtained by using a plurality of driving history data can be made more objective. The specified second access ease data is stored in the second data storage unit 25 in association with the facility. The second access ease data stored in the second data storage unit 25 is supplied to the facility data storage unit 40 of the navigation device.

[0027] Figure 2 shows the navigation device 2 of the embodiment. This navigation device 2 includes a map data storage unit 30, a facility data storage unit 40, a display unit 50, and a control unit 60. The map data storage unit 30 stores data for displaying a map on the display unit 50 of the navigation device 2. Link data and node data that define the coordinates of roads are stored in the link-node storage unit 31. Data such as road type and road regulations are stored in the road data storage unit 33.

[0028] The facility data storage unit 40 includes a facility location data storage unit 41, an attribute data storage unit 42, and an access ease data storage unit 45. The facility location data storage unit 41 stores the coordinates of the facility, and the attribute data storage unit 42 stores the name, type, and other data characterizing the facility. In Figure 2, the elements enclosed by the dotted line, namely the map data storage unit 30, the facility location data storage unit 41 and the attribute data storage unit 42 of the facility data storage unit 40, the first display control unit 61, and the route search unit (not shown), constitute the main part of a general navigation device.

[0029] In the navigation device 2 of this embodiment, the facility data storage unit 40 is provided with an access ease data storage unit 45, and the control unit 60 is provided with a second display control unit 62. As described above, the first and second access ease data are stored in the access ease data storage unit 45.

[0030] The facility extraction unit 621 of the second display control unit 62 extracts facilities that are displayed on the display unit 50 and to which access ease data is assigned. The display mode change unit 623 changes the display mode of the extracted facilities. For example, when an icon of a facility or text representing the name of the facility is displayed on the display unit 50, they are emphasized and displayed. Examples of the emphasizing mode include enlarged display, blinking display, and brightness improvement. When the facilities are listed, the display order of the corresponding facilities is adjusted.

[0031] Via the destination setting unit 70, the driver designates an area and the attributes of facilities existing in this area (such as convenience stores, etc.). The area specified in this way is displayed on the display unit 50. If a facility with the designated attribute exists in the area, the facility is also displayed on the display unit 50 together (a general function of the navigation device). Among the facilities displayed in this way, the facility extraction unit 621 refers to the access ease data storage unit 45 and extracts the facilities whose display mode is to be changed.

[0032] The traveling state specifying unit 80 specifies the traveling state of the vehicle and displays the position and traveling direction of the vehicle on the display unit 50. When it is specified by the traveling state specifying unit 80 that the vehicle is moving, the facility extraction unit 621 enables the extraction of the facilities displayed on the display unit 50. When the vehicle is stopped, it is considered that the vehicle is often in a state of having already stopped at a facility, so the extraction of facilities is stopped. Also, when the traveling direction of the vehicle is specified by the traveling state specifying unit 80, the facility extraction unit 621 extracts only the facilities located in front of the traveling direction of the vehicle among the facilities in the area of the display unit 50 where the vehicle is displayed. This is because it takes time to stop at facilities located behind the traveling direction in the first place.

[0033] Next, the operation of the navigation device 1 will be described with reference to the flowchart of FIG. 3. In step 1, the navigation device 2 is set to the access ease mode. In step 2, the facility extraction unit 621 extracts the facilities in the area displayed on the display unit 50. Further, in step 3, among the extracted facilities, those associated with access ease data are extracted with reference to the access ease data storage unit 45.

[0034] In step 4, the facility extraction unit 621 further extracts only the facilities existing in the area located in front of the vehicle in the direction of travel of the vehicle, with reference to the travel state of the vehicle specified by the travel state specifying unit 80, from among the facilities in the area displayed on the display unit 50. At this time, when the vehicle is in a stopped state, no facility extraction is performed. In step 5, the facility extraction unit 621 determines whether there are a plurality of facilities located in the front area in the vehicle travel direction. It is assumed that the facilities in this case include those not associated with access ease data. If the number of facilities in step 5 is singular (S5:N), no change is made to the display mode of the facility. If a plurality of facilities are applicable in step 5 (S5:Y), the display mode of the facilities associated with access ease data is changed by the display mode change unit 623 (step 6).

[0035] The details of step 6 will be described with reference to the flowchart of FIG. 4. For the facilities for which the display mode is to be changed, in step 61, the second display control unit 62 accesses the access ease data storage unit 45 and reads the first access ease data corresponding to that facility.

[0036] Here, when the first access ease data is greater than a predetermined first threshold (step 62:Y), it is assumed that access from the road is easy, and the facility is highlighted (step 67). When the first access ease data in the case where the facility name includes a term suggesting a road is "5", the first access ease data in the case where it includes a specific term suggesting a large-scale facility is "0", and the first access ease data in other cases is "2", the first threshold can be set to "3". In this example, for a facility with a name including a term suggesting a road, the determination in step 62 is "Y", and the facility is highlighted (step 67).

Table 1

[0037] In step 64, the second display control unit 62 accesses the access easiness data storage unit 45 and reads out the second access easiness data corresponding to the facility. Here, when the second access easiness data is greater than a predetermined second threshold value (step 65: Y), it is assumed that access from the road is easy, and the facility is highlighted (step 67).

[0038] In the above example, the access easiness data D1 based on the travel distance from the road to entering and parking at the facility among the travel history data, which is the first analysis target, and the access easiness data D2 based on the number of times the steering wheel is rotated by a predetermined angle or more from the road to entering and parking at the parking lot of the facility, which is also the second analysis target, are each quantified, and the average value thereof can be used as the second access easiness data.

[0039] For example, regarding the moving amount in the parking lot, when 10 to 30 m is quantified as "5", 31 to 50 m as "4", 51 to 70 m as "3", 71 to 100 as "2", 101 to 150 m as "1", and 151 m or more as "0", and on the other hand, when the number of rotations of the steering wheel is quantified as "5" for 1 to 3 rotations, "4" for 4 to 5 rotations, "3" for 6 to 7 rotations, "2" for 8 to 9 rotations, "1" for 10 to 11 rotations, and "0" for 12 or more rotations, the second threshold value can be set to "3".

Table 2

[0040] For a facility determined not to meet the threshold value in both step 62 and step 65, no highlighting is performed, and a general display mode in the navigation device 2 is executed.

[0041] Regarding step 6 in FIG. 3, other embodiments are shown in the flowchart of FIG. 5. In FIG. 5, the same operations as those in FIG. 4 are given the same reference numerals, and the description thereof is omitted. In FIG. 5, in step 71, the sum of the first access ease data A1 and the second access ease data A2 is compared with a third threshold value (=8). When the former exceeds the latter (step 71: Y), in step 73, the target facility is super-emphasized. When the sum of the first access ease data A1 and the second access ease data A2 is less than or equal to the third threshold value (=8) and exceeds a fourth threshold value (=6) (step 74: Y), in step 75, the target facility is emphasized. This emphasis is less intense than the super-emphasis in step 73.

[0042] On the other hand, when the sum of the first access ease data A1 and the second access ease data A2 is less than or equal to a fifth threshold value (=4) (step 76: N), in step 77, the display of the facility is stopped. Assuming that access is difficult, the driver is not guided to it deliberately. For facilities where the sum of the first access ease data A1 and the second access ease data A is less than or equal to the fourth threshold value (=6) and exceeds the fifth threshold value (=4), the display mode thereof is not changed.

[0043] In this example, for the facilities displayed on the display unit 50 of the navigation device 2, the display mode thereof is controlled by the second display control unit 62 each time. The processes shown in FIGS. 4 and 5 may be executed in advance for each facility, the obtained results may be associated with each facility as access ease data, this may be read by the facility extraction unit 621, and reflected in the operation of the display mode change unit 623.

[0044] FIG. 6 shows the hardware configuration of the data creation device 1 shown in FIG. 1. The arithmetic unit 300 includes a CPU 301, a ROM 303, and a RAM 305, and controls the entire system. At the same time, it controls the arithmetic parts of the facility name analysis unit 11, the first extraction unit 21, the second extraction unit 22, and the second data analysis unit 23. The ROM 303 is a non-volatile memory in which a control program for controlling the arithmetic unit 300 and the like are stored. The RAM 305 provides a working area for the CPU 301. The control program for controlling the arithmetic unit 300 may be stored not only in the ROM 303 but also in the RAM 305 or the first storage device 340. Various data are output via the output device 320. Various data are input via the input device 330.

[0045] The first storage device 340 functions as a first data storage unit 15 and a second data storage unit 25. It is preferable that the first storage device 340 uses a part of the memory device of the server system, such as a hard memory or a flash memory. As a storage unit for temporarily stored data, that is, a so-called buffer memory, a part of the area of the RAM of the arithmetic unit can be used. The external communication network is connected by a communication interface 360. The facility name data storage unit 3 and the travel history data storage unit 5 in FIG. 1 use an external server and are connected via the communication interface 360. Each device constituting the computer is connected by a system bus 370.

[0046] FIG. 7 shows the hardware configuration of the navigation device 2 in FIG. 2. Note that elements that perform the same operations as those in FIG. 6 are denoted by the same reference numerals and their descriptions are omitted. The arithmetic unit 300 functions as a control unit 60, a travel state specifying unit 80, and a route search unit (not shown). The first storage device 440 functions as a map data storage unit 30 and a facility data storage unit 40. The output device 420 functions as a display unit 50, and the input device 430 functions as a destination setting unit 70.

[0047] The present invention is not limited to the descriptions of the embodiments and examples of the above invention. Various modifications within the scope easily conceivable by those skilled in the art without departing from the description of the claims are also included in the present invention.

Explanation of Signs

[0048] 1 Data generation device, 3 Facility name data storage unit, 5 Driving history data storage unit, 11 Facility name analysis unit, 15 First data storage unit, 20 Driving history data processing area, 21 First extraction unit, 22 Second extraction unit, 23 Second data analysis unit, 25 Second data storage unit, 30 Map data storage unit, 40 Facility data storage unit, 45 Accessibility data storage unit, 50 Display unit, 60 Control unit, 61 First display control unit, 62 Second display control unit, 70 Destination setting unit, 80 Driving state identification unit, A1 First accessibility data, A2 Second accessibility data

Claims

1. A navigation device comprising a map data storage unit, a facility data storage unit, a display unit, and a control unit, the map data storage unit stores links and nodes defining roads and road data associated with the roads; the facility data storage unit stores facility location data that defines the location of a facility and facility attribute data that identifies attributes of the facility; a navigation device in which the control unit includes a first display control unit, the first display control unit displays a road map on the display unit based on the map data and displays facilities on the display unit based on the facility data in accordance with a predetermined display rule, the facility data storage unit further includes accessibility data for each facility, the accessibility data relating to the accessibility from roads to the facility; The control unit includes a second display control unit, and the second display control unit changes the display mode of the facility on the display unit by referring to the accessibility data.

2. The device according to claim 1 , wherein when the first display control unit displays a plurality of facilities on the display unit in accordance with the predetermined display rule, the second display control unit changes the display mode of the facilities.

3. The device according to claim 2 , wherein the second display control unit changes the display of the facility when the vehicle is moving.

4. The device according to claim 3 , wherein the second display control unit changes a display of facilities that exist within a predetermined area in the traveling direction of the vehicle.

5. The device according to claim 1 , wherein the second display control unit changes the display of the facilities by highlighting the display of the facilities or by changing the order in which the facilities are displayed in the list.

6. 3. The device according to claim 2, further comprising a destination designation unit, wherein when an area and attributes of facilities are designated by the destination designation unit, the first display control unit extracts facilities having the designated attributes within the designated area, and the second display control unit changes the display of the extracted facilities.

7. The accessibility data includes first accessibility data derived from the name of the facility, second accessibility data derived from vehicle travel data, or a combination of these data; 2. The device according to claim 1, wherein the second display control unit highlights the facility on the display unit when the accessibility data is higher than a predetermined threshold, or stops displaying the facility on the display unit when the accessibility data is lower than a predetermined threshold.

8. a data generating device that generates facility data stored in a facility data storage unit of a navigation device, the facility data being accessibility data relating to the ease of access from roads to the facility for each facility, the data generating device comprising: a facility name analysis unit that analyzes facility names in accordance with predetermined rules; a first data specifying unit that specifies first accessibility data for each facility based on the analysis result of the facility name analysis unit; a first data storage unit that stores the identified first accessibility data.

9. a data generating device that generates facility data stored in a facility data storage unit of a navigation device, the facility data being accessibility data relating to the ease of access from roads to the facility for each facility, the data generating device comprising: a vehicle driving history acquisition unit that acquires a vehicle driving history from when the vehicle enters a parking lot of the facility from a road until the engine is stopped; a first extraction unit that extracts a first analysis object from the acquired vehicle travel history; a second extraction unit that extracts a second analysis object from the acquired vehicle travel history; a second data calculation unit that calculates the extraction result of the first extraction unit and the extraction result of the second extraction unit to identify second accessibility data for each facility; a second data storage unit that stores the identified second accessibility data.

10. The device according to claim 9 , wherein the second data calculation unit identifies second accessibility data based on an amount of operation of the first analysis target and an amount of operation of the second analysis target.

11. a data generating device that generates facility data stored in a facility data storage unit of a navigation device, the facility data being accessibility data relating to the ease of access from roads to the facility for each facility, the data generating device comprising: a vehicle driving history acquisition unit that acquires a vehicle driving history from when the vehicle enters a parking lot of the facility from a road until when the vehicle exits the parking lot; a first extraction unit that extracts a first analysis object from the acquired vehicle travel history; a second extraction unit that extracts a second analysis object from the acquired vehicle travel history; a second data specifying unit that calculates the extraction result of the first extracting unit and the extraction result of the second extracting unit to specify second accessibility data for each facility; a second data storage unit that stores the identified second accessibility data.

12. A navigation device comprising a map data storage unit, a facility data storage unit, a display unit, and a control unit, The map data storage unit stores links and nodes defining roads and road data associated with the roads. the facility data storage unit stores facility location data that defines the location of a facility and facility attribute data that identifies attributes of the facility; a navigation method using a navigation device, wherein the control unit includes a first display control unit, and the first display control unit displays a road map on the display unit based on the map data and displays facilities on the display unit based on the facility data in accordance with a predetermined display rule, storing accessibility data in the facility data storage unit; A navigation method comprising causing a second display control unit of the control unit to refer to the accessibility data and changing the display mode of the facility on the display unit.

13. A navigation device comprising a map data storage unit, a facility data storage unit, a display unit, and a control unit, The map data storage unit stores links and nodes defining roads and road data associated with the roads. the facility data storage unit stores facility location data that defines the location of a facility and facility attribute data that identifies attributes of the facility; the control unit includes a first display control unit, and the first display control unit displays a road map on the display unit based on the map data and displays facilities on the display unit based on the facility data in accordance with a predetermined display rule, The facility data storage unit stores accessibility data, A computer program that causes a second display control unit of the control unit to refer to the accessibility data and change the display mode of the facility on the display unit.

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