JP2012189415A - Portable navigation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a user to select a route that suits user's taste among a plurality of route candidates extracted based on extraction conditions of an exercise load and an elevation value.SOLUTION: A portable navigation device 1 stores map data including elevation values of respective spots on a road map in node data, in a storage unit 11. A control unit 10 in the portable navigation device 1 searches for a plurality of routes from a departure place to a destination based on the map data stored in the storage unit 11, and extracts route candidates among the plurality of routes based on an exercise load and an elevation value. The control unit 10 displays the extracted route candidates on a display monitor 12 to require a user to select a route for route guidance among the route candidates, and controls the portable navigation device 1 to start route guidance based on the selected route.

Description

  The present invention relates to a portable navigation device.

  There are known navigation devices that can be used during exercise such as cycling and running. For example, in Patent Document 1, a calorie consumed when exercising along a searched route is calculated, and when a route whose calorie consumption exceeds a target value is searched, the route is a recommended route. A navigation system is described.

JP 2007-292505 A

  In order to consume predetermined calories by exercise, exercise with low exercise intensity may be performed for a long time, or exercise with high exercise intensity may be performed for a relatively short time. When exercising, such as cycling, you can consume a certain amount of calories by running on a route with a small undulation for a long time, or by running on a route with a large undulation for a relatively short time. Can be consumed. Which route is desired to exercise depends on the individual user, and it has been desired to be able to select a route that matches the user's preference regarding exercise.

  A portable navigation device for guiding a user who exercises, based on map data storage means for storing map data relating to a road map, elevation value storage means for storing elevation values at each point on the road map, and map data Based on the route search means for searching a plurality of routes from the departure point to the destination, the exercise load when traveling along the route, and the altitude value of each point included in the route, one of the plurality of routes is selected. Alternatively, route candidate extraction means for extracting two or more route candidates, route candidate display means for displaying the route candidates extracted by the route candidate extraction means on the display screen, and route candidates displayed on the display screen by the route candidate display means Route guidance means for guiding the route based on the route selected by the user from the above.

  ADVANTAGE OF THE INVENTION According to this invention, the user can select the path | route which suits his preference from the several path | route candidates extracted based on the extraction conditions of exercise load and an altitude value.

It is a block diagram which shows the example of 1 structure of the portable navigation apparatus by one Embodiment of this invention. It is an example of the setting screen for extracting a route candidate. It is an example of the screen which displayed the altitude change of the route candidate. It is an example of the screen which displayed the route candidate on the road map. It is an example of the screen which displayed the exercise result. It is an example of the flowchart regarding the navigation process which the portable navigation apparatus by one Embodiment of this invention performs. 5 is a flowchart relating to processing for displaying a route candidate by the portable navigation device according to the embodiment of the present invention. 5 is a flowchart relating to processing for displaying a route candidate by the portable navigation device according to the embodiment of the present invention.

  A portable navigation device according to an embodiment of the present invention will be described with reference to the drawings. The portable navigation device according to an embodiment of the present invention can be applied to a user who performs exercises such as cycling and jogging, but in the following, for the sake of simplification of explanation, the user is assumed to perform exercises on a bicycle.

  FIG. 1 is a block diagram showing the configuration of the portable navigation device 1. The portable navigation device 1 includes a control unit 10, a storage unit 11, a display monitor 12, a speaker 13, a GPS receiving unit 14, and an input device 15. The portable navigation device 1 is connected to an exercise load measurement device 2 mounted on a bicycle or a user's body by wire or wirelessly. The exercise load measuring device 2 is, for example, a cycle computer, and measures a bicycle running speed, a running distance, an accumulated distance, a running time, a cadence (speed of turning a pedal), a user's heart rate, a calorie consumption, and the like. The measurement results can be transmitted to the portable navigation device 1.

  The control unit 10 includes a microprocessor, various peripheral circuits, RAM, ROM, and the like. The control unit 10 controls each component of the portable navigation device 1 and executes processing such as route search processing and route guidance processing.

  The storage unit 11 is a non-volatile storage member such as a flash memory. The storage unit 11 stores map data, various image data such as icons, audio data, personal information such as weight previously input by the user, and the like.

  The map data stored in the storage unit 11 includes map display data, route search data, facility data, and the like. The map display data is data for displaying a road map on the display monitor 12. The route search data is data used for route search processing. The facility data is data regarding facilities such as convenience stores, restaurants, bicycle parking lots, and public toilets, and stores at least the type, name, location information, and the like of each facility.

  The route search data includes node data and link data. The node data is data related to a node representing a point such as an intersection on a road map. The road between the two nodes is converted into data as a link. Data regarding this link is link data. The link data includes information on the node that is the end point, link length, link cost, and information on the surrounding environment (mountain, coast, rural area, urban area, urban area, etc.) corresponding to the link. The node data stores coordinates of points represented by each node, elevation values, information about links extending from the nodes, traffic signal information indicating the presence or absence of traffic signals, and the like.

  The display monitor 12 is, for example, a liquid crystal monitor, and displays various operation menus of the portable navigation device 1, a route candidate display screen, a guidance screen in route guidance processing, and the like. The speaker 13 can output the voice guidance in the route guidance process and various kinds of music.

  The GPS receiver 14 receives a GPS signal transmitted from a GPS satellite and outputs it to the controller 10. The GPS signal includes time data from an atomic clock mounted on a GPS satellite. The control unit 10 can calculate the current position and the current time of the portable navigation device 1 using the time data included in the GPS signal.

  The input device 15 includes various switches, an operation panel, a touch panel integrated with the display monitor 12, and the like. The user can operate the portable navigation device 1 or input information using the input device 15.

  The control unit 10 of the portable navigation device 1 searches for a plurality of routes from the departure point to the destination based on the route search data stored in the storage unit 11. The control unit 10 extracts one or two or more routes that match a condition preset by the user from the searched routes. Hereinafter, the conditions used for extracting the route are referred to as candidate extraction conditions. A route that matches the candidate extraction condition extracted by the control unit 10 is referred to as a guide route candidate.

  FIG. 2 is an example of a setting screen used by the user for setting candidate extraction conditions. The setting screen 20 is displayed on the display monitor 12. On the setting screen 20, an altitude difference setting unit 21, an exercise load setting unit 22, an arrival time setting unit 23, a maximum candidate number setting unit 24, and a setting completion button 25 are displayed. The user can input and set candidate extraction conditions such as an altitude difference, exercise load, arrival time, and maximum number of candidates in each part of the setting screen 20 using the input device 15.

  The altitude difference setting unit 21 displays buttons used by the user for setting related to the altitude difference. The altitude difference setting unit 21 displays three buttons “large”, “small”, and “off”. The user can select any of the three buttons using the input device 15 such as a touch panel.

  When the user selects the “Large” button using the input device 15, a route in which the altitude value of a node included in the route changes relatively greatly compared to other routes is extracted as a guide route candidate. For example, the maximum value and the minimum value are extracted from the elevation values of the nodes included in each of the plurality of routes, and a route having a relatively large difference is extracted as a guide route candidate. Alternatively, a variance value may be calculated for the elevation values of the nodes included in the route, and a value having a large variance value may be extracted.

  When the user selects the “small” button using the input device 15, a route in which the altitude value of a node included in the route changes relatively small is extracted as a guide route candidate. When the user selects the “OFF” button using the input device 15, the guide route candidate is not extracted on the condition of the elevation difference.

  The exercise load setting unit 22 displays buttons used by the user for setting related to exercise load. The exercise load setting unit 22 displays three buttons “large”, “small”, and “off”. The user can select any of the three buttons using the input device 15 such as a touch panel.

When the user selects the “Large” button using the input device 15, those having a large exercise load when traveling along the route, that is, those having a large calorie consumption are extracted as guidance route candidates. The calorie consumption for each guide route candidate can be estimated based on a known method such as the METs (Metabolic Equivalents) method. For example, the calorie consumption can be estimated by the following mathematical formula (1). Note that the number of METs in the formula (1) is a constant determined in advance for each type of exercise and average speed during exercise. The weight of the user is stored in the storage unit 11. The exercise time may be obtained by dividing the route length of each guide route candidate by the average speed associated with the number of METs.
Calorie consumption [kcal] = 1.05 × user weight [kg] × number of METs × exercise time [h] (1)

  When the user selects the “Small” button using the input device 15, those having a small exercise load when traveling along the route, that is, those having a small calorie consumption are extracted as guidance route candidates. When the user selects the “OFF” button using the input device 15, guidance route candidates are not extracted on condition of exercise load.

  The arrival time setting unit 23 is used by the user to make settings related to the arrival time. In the arrival time setting section 23, two buttons “designate” and “do not designate” are displayed. When the user selects a “specify” button using the input device 15 and inputs a desired arrival time in the input field 231 below, a route that can be reached by that time is extracted as a guide route candidate. If the user selects “not specified”, the desired arrival time is not set.

  The maximum candidate number setting unit 24 displays a button for setting an upper limit on the number of guide route candidates extracted by the user. In the maximum candidate number setting section 24, three buttons “5”, “10”, and “20” are displayed. When the user selects the “5” button using the input device 15, the number of extracted guide route candidates is a maximum of five. Similarly, when the “10” button is selected, the maximum number of extracted guide route candidates is 10. For the “20” button, the maximum number of guide route candidates to be extracted is 20.

  When the user selects the setting completion button 25 using the input device 15, the setting of candidate extraction conditions on the setting screen 20 is completed. The set candidate extraction conditions are stored in the storage unit 11. And based on the candidate extraction conditions memorize | stored in the memory | storage part 11, a guidance route candidate is extracted from the some route searched by the route search process.

  The portable navigation device 1 displays the extracted guide route candidates on the display monitor 12 as shown in FIGS. 3 and 4 and allows the user to select a route for route guidance. In the guide route candidate display method shown in FIG. 3, the elevation change of the guide route candidate is displayed in a line graph, and the size of the undulation of the route is displayed as an image. Such a guide route candidate display method is referred to as an elevation change display type. In the guide route candidate display method shown in FIG. 4, the guide route candidates are displayed so as to overlap the road map. The guide route candidate display method of FIG. 4 is referred to as a map display type. The user can select one desired route while switching between the two display methods.

  FIG. 3 is an example of an elevation change display type route candidate display screen. In the elevation change display type route candidate display screen shown in FIG. 3, the guidance route candidate A and the guidance route candidate B that are relatively matched with the candidate extraction conditions among the extracted guidance route candidates are displayed. In the display area 31a of the guide route candidate A, a line graph 300a representing a change in the altitude value of a node passing through the guide route candidate A is displayed. The horizontal axis of the display area 31a of the guide route candidate A represents the route length, and the vertical axis represents the altitude value. The left end of the display area 31a represents the departure place, and the right end represents the destination. The line graph 300a is drawn by plotting each node passing through the guide route candidate A based on the distance from the departure point and the elevation value, and drawing a line segment between the plotted points. The distance from the departure point to each node can be calculated from the link length of the link passing from the departure point.

  Two traffic light icons 301 and a mountain road display icon 302 are displayed on the line graph 300a. Below the line graph 300a, the route length 310a of the guide route candidate A is displayed as “14 km”. The traffic light icon 301 indicates that there is an intersection with a traffic light on the guide route candidate A. The presence / absence of a traffic signal is determined based on traffic signal information included in the node data. The mountain road display icon 302 indicates that the surrounding environment of the road corresponding to the link with the icon on the guide route candidate A is a mountain road. Whether or not the surrounding environment of the road is a mountain road is determined based on information about the surrounding environment of the road included in the link data.

  In the display area 31b of the guide route candidate B, a line graph 300b representing a change in the altitude value of a node passing through the guide route candidate B is displayed as in the display area 31a of the guide route candidate A. On the line graph 300b, five traffic light icons 301, a public toilet icon 303, and a convenience store icon 304 are displayed. Below the line graph 300b, the route length 310b of the guide route candidate B is displayed as “30 km”. The public toilet icon 303 and the convenience store icon 304 are displayed based on the facility data, and when there is a public toilet or convenience store within a predetermined distance (for example, 50 m) from the guide route candidate B. They are displayed at corresponding positions on the line graph 300b. The link included in the line graph 300b is a city area around the corresponding road, and an icon such as the mountain road display icon 302 is not displayed.

  In FIG. 3, a next candidate button 32, a map display button 33, and a decision button 34 are displayed below the display area 31 b of the guide route candidate B. When the user selects the next candidate button 32 using the input device 15, the guide route candidate displayed on the display monitor 12 is switched to another guide route candidate. When the user selects the map display button 33 using the input device 15, the route candidate display screen is switched from the altitude change display type to the map display type.

  The user can select one route for route guidance from the guidance route candidates displayed on the display monitor 12 using the input device 15. The selected guidance route candidate is determined as a route guidance route when the user selects the decision button 34 using the input device 15.

  FIG. 4 is an example of a map display type route candidate display screen. On the map display type route candidate display screen shown in FIG. 4, a road map 40 including a departure place S and a destination D is displayed. In the map display type route candidate display screen shown in FIG. 4, the guide route candidate A and the guide route candidate B among the guide route candidates extracted based on the candidate extraction conditions are displayed so as to overlap the road map 40. . Guidance route candidate A is selected by the user and is displayed with a solid line. On the other hand, the guide route candidate B not selected by the user is displayed with a dotted line. The road map 40 is displayed at the maximum scale that can simultaneously display the departure place S, the destination D, the displayed guide route candidate A, and the displayed guide route candidate B. The road map is displayed based on map display data included in the map data.

  In FIG. 4, a next candidate button 41, an altitude display button 42, and a determination button 43 are displayed below the road map 40. When the user selects the next candidate button 41 using the input device 15, the guide route candidate displayed on the display monitor 12 is switched to another guide route candidate. When the user selects the altitude display button 42 using the input device 15, the route candidate display screen is switched from the map display type to the altitude change display type.

  The user can select one route for route guidance from the guidance route candidates displayed on the display monitor 12 using the input device 15. The selected guide route candidate is determined as a route guidance route when the user selects the determination button 43 using the input device 15.

  When the user selects a route for route guidance from among the guidance route candidates displayed on any of the route candidate display screens, the portable navigation device 1 starts route guidance based on the route. When starting the route guidance based on the selected route, the control unit 10 starts measuring the exercise load by the exercise load measuring device 2. When the user arrives at the destination, the measurement result of the exercise load is acquired from the exercise load measuring device 2. For example, information such as the user's heart rate, calorie consumption, and cadence is acquired. Then, based on the information acquired from the exercise load measuring device 2, information related to the exercise result is displayed on the display monitor 12.

  FIG. 5 is an example of a screen on which information related to the exercise result is displayed on the display monitor 12 of the portable navigation device 1. FIG. 5 shows a travel distance display 51 relating to the travel distance of the route traveled by the user following route guidance, an elevation difference display 52 relating to the difference between the maximum elevation value and the minimum elevation value in the route, An exercise heart rate display 53 relating to the maximum value of the heart rate while traveling along the route, a calorie consumption display 54 relating to calories consumed by the user traveling along the route, and a user following the route A cadence display 55 relating to the maximum value of the cadence while traveling is displayed.

  The information displayed on the travel distance display 51 and the information displayed on the elevation difference display 52 are calculated from link and node information included in the route selected for route guidance by the user. For example, the travel distance display 51 may calculate the sum of the link lengths of the links included in the route. The elevation difference display 52 may extract the maximum value and the minimum value from the elevation values of the nodes included in the route and calculate the difference.

  The information displayed on the exercise heart rate display 53 may be based on the user's heart rate measured by the exercise load measuring device 2. The information displayed on the calorie consumption display 54 may be based on the calorie consumption measured by the exercise load measuring device 2 or may be a value estimated by the METs method described above. The information displayed on the cadence display 55 may display the cadence measured by the exercise load measuring device 2.

  FIG. 6 is an example of a flowchart relating to processing executed by the portable navigation device 1 described above. In step S100, the control unit 10 of the portable navigation device 1 sets a departure place and a destination. For example, the current position of the portable navigation device 1 calculated by the control unit 10 based on the GPS signal received by the GPS receiving unit 14 may be set as the departure place. The destination may be specified by the user using the input device 15. For example, the input device 15 may be used to select from facility data stored in the storage unit 11. Further, the user may be designated using the input device 15 from the road map displayed on the display monitor 12 based on the map display data stored in the storage unit 11.

  In step S200, the control unit 10 displays the setting screen of FIG. 2 on the display monitor 12, and allows the user to set candidate extraction conditions. The set candidate extraction conditions are stored in the storage unit 11 of the portable navigation device 1.

  In step S300, the control unit 10 searches for a plurality of routes from the departure point to the destination set in step S100. A known technique such as Dijkstra method may be used to search for a plurality of routes.

  In step S400, the control unit 10 calculates information representing an elevation change and exercise load for each route searched in step S300. In step S500, the control unit 10 extracts guide route candidates that match the candidate extraction conditions set in step S200 from the routes searched in step S300, based on the elevation change and exercise load calculated in step S400. To do.

  In step S600, the guide route candidates extracted in step S500 are displayed on the route candidate display screen as shown in FIGS. 3 and 4, and the user is allowed to select a route for route guidance. In step S700, route guidance is performed according to the route guidance route selected in step S600. In step S800, based on the information acquired from the exercise load measuring device 2 and the like, information related to the exercise result is displayed as shown in FIG.

  7 and 8 are examples of flowcharts relating to processing executed by the control unit 10 in step S600 of FIG. In step S601 in FIG. 7, the control unit 10 extracts link data of links included in each of the guide route candidates extracted in step S500. In step S602, the control unit 10 extracts position information and an altitude value of the node corresponding to the end point of the link included in each guide route candidate from the node data. In step S603, information about the surrounding environment of the road represented by the link is extracted from the link data extracted in step S601. In step S604, the traffic signal information is referred to for each node corresponding to the end point of the link included in each guide route candidate, and the node with the traffic signal is extracted. In step S605, the control unit 10 extracts facility information of facilities existing within a predetermined distance from each guide route candidate from the facility data.

  In step S606, the control unit 10 displays an elevation change type route candidate display screen as shown in FIG. The control unit 10 guides a predetermined number (two in the example of FIG. 3) of the guidance route candidates extracted in step S500 based on the altitude value of each node extracted in step S602 and the distance from the departure place. For the route candidates, line graphs 300a and 300b representing changes in the altitude of the guide route candidates are displayed in the display areas 31a and 31b of the guide route candidates, respectively. At this time, the display mode of the broken line is changed based on the information about the surrounding environment of the road extracted in step S603. For example, when the surrounding environment of the road is a mountain road, a mountain road display icon 302 is displayed or the thickness of the line is increased. Further, when the surrounding environment of the road is a coast, the line color is changed and a display icon for the coast is displayed. Furthermore, based on the extraction result of step S604, the traffic signal icon 301 is displayed on the line graph for the node with the traffic signal. Further, an icon representing the facility extracted in step S605 is displayed at a corresponding position on the broken line.

  In step S607, the control unit 10 determines whether or not the map display button 33 has been selected. If the map display button is selected, the control unit 10 advances the process to step S610 in FIG. 8, and advances to step S608 if not selected. In step S608, the control unit 10 determines whether or not the enter button 34 has been selected. When the determination button 34 is selected and the route for route guidance is determined, the control unit 10 ends the process of FIG. 7. When the determination button 34 is not selected, the control unit 10 advances the process to step S609. In step S609, the control unit 10 determines whether or not the next candidate button 32 has been selected. If the next candidate button 32 is selected, the control unit 10 returns the process to step S606 to display an elevation change type route candidate display screen for the next guidance route candidate, and if not selected, the process proceeds to step S607. Return to.

  In step S610 of FIG. 8, the control unit 10 sets a predetermined number (two in the example of FIG. 4) of guide route candidates extracted from step S500 as display targets, and displays the departure point, the destination, and the display. The scale of the map that can display all the target guide route candidates is determined. In step S611, the control unit 10 displays a map display type route candidate display screen as shown in FIG. The control unit 10 displays a road map (road map 40) that can display all of the starting point, the destination, and the guide route candidates to be displayed (guide route candidate A and guide route candidate B) at the scale of the map determined in step S610. Displayed on the display monitor 12. And the control part 10 displays the guidance route candidate of a display object so that it may overlap with the road map.

  In step S612, the control unit 10 determines whether or not the altitude display button 42 has been selected. If the altitude display button 42 is selected, the process returns to step S602 in FIG. 7, and if the altitude display button 42 is not selected, the process proceeds to step S613. In step S613, the control unit 10 determines whether or not the enter button 43 has been selected. When the determination button 43 is selected and the route for route guidance is determined, the processing of FIG. 8 is terminated, and when the determination button 43 is not selected, the processing proceeds to step S614. In step S614, the control unit 10 determines whether or not the next candidate button 41 has been selected. If the next candidate button 41 is selected, the process returns to step S610 to determine a map scale for the next guidance route candidate and display a map display type route candidate display screen. On the other hand, if the next candidate button 41 is not selected, the process returns to step S612.

According to the embodiment described above, the following operational effects are obtained.
A portable navigation device 1 according to an embodiment of the present invention includes a storage unit 11 that stores map data that includes elevation values of points on a road map in node data. The control unit 10 of the portable navigation device 1 searches for a plurality of routes from the departure point to the destination based on the map data stored in the storage unit 11, and from among the plurality of routes based on the exercise load and the altitude value. Guide route candidates are extracted. The control unit 10 of the portable navigation device 1 displays the extracted guide route candidates on the display monitor 12 and allows the user to select a route for route guidance from among the guide route candidates displayed, and based on the selected route. To guide the route. By doing in this way, the user can select the path | route which can do the exercise | movement which suits his preference from several guidance route candidates.

  In addition, as shown in FIG. 3, by displaying the guide route candidate with a broken line with the route length of the guide route candidate as the horizontal axis and the altitude value as the vertical axis, the undulations etc. included in the guide route candidate can be visually recognized by the user. Can be confirmed.

  Further, as shown in FIG. 3, the user can determine what place the guidance route candidate passes by changing the display mode of each line segment representing the guidance route candidate based on the surrounding environment of the road. Can be confirmed. Further, by displaying information on facilities such as convenience stores on the guide route candidates, it is possible to provide information on places where the user can take a break.

The embodiment described above can be implemented with the following modifications.
[1] In the above embodiment, the user performs exercise on a bicycle, but the present invention can also be applied to other exercises such as jogging. In this case, the exercise load measuring device 2 may be a pedometer or a heart rate monitor, not a cycle computer.

[2] Information on the altitude value of each node may be stored separately from the map data as altitude data. At this time, each node of the map data is associated with the elevation value stored in the elevation data on a one-to-one basis using an identification number or the like. The same applies to information on the surrounding environment of the road and traffic signal information.

[3] On the elevation change display type route candidate display screen illustrated in FIG. 3, route lengths 310 a and 310 b are displayed under the line graphs 300 a and 300 b of each guide route candidate. The place where the route length is displayed is not limited to the line below the broken line. In addition to the route length, the estimated calorie consumption, the estimated arrival time calculated from the route length and the link cost, and the like may be displayed.

[4] On the elevation change display type route candidate display screen illustrated in FIG. 3, each guide route candidate is displayed as a line graph 300a, 300b. However, the display method is not limited to that illustrated in FIG. For example, the line graph may be displayed as a curve with rounded corners, or the approximate function of the line graph may be calculated and the curve represented by the approximate function may be displayed. Moreover, you may display by a bar graph instead of a line graph.

[5] In the above embodiment, the map display button 33 and the altitude display button 42 are used to switch between the altitude change display type route candidate display screen of FIG. 3 and the map display type route candidate display screen of FIG. did. However, the elevation change display type route candidate display screen and the map display type route candidate display screen may be simultaneously displayed on one screen. Further, it is sufficient that at least one of the altitude change display type and map display type route candidate display screens can be displayed.

  The embodiments and various modifications described above may be combined and executed as long as the features of the invention are not impaired. Each embodiment and various modifications described above are merely examples, and the present invention is not limited to these contents as long as the features of the invention are not impaired.

DESCRIPTION OF SYMBOLS 1 Portable navigation apparatus 2 Exercise load measuring apparatus 10 Control part 11 Memory | storage part 12 Display monitor 13 Speaker 14 GPS receiving part 15 Input device 20 Setting screen 300a, 300b Line graph

Claims (5)

A portable navigation device that provides route guidance to an exercising user,
Map data storage means for storing map data relating to road maps;
Altitude value storage means for storing the altitude value at each point on the road map;
Based on the map data, route search means for searching a plurality of routes from the departure point to the destination,
Route candidate extraction means for extracting one or more route candidates from the plurality of routes based on the exercise load when traveling on the route and the elevation value of each point included in the route;
Route candidate display means for displaying the route candidates extracted by the route candidate extraction means on a display screen;
Route guidance means for guiding the route based on the route selected by the user from the route candidates displayed on the display screen by the route candidate display means;
A portable navigation device comprising: The portable navigation device according to claim 1, wherein
The portable route navigation apparatus, wherein the route candidate display means displays a graph representing a relationship between a travel distance and an altitude value for the route candidate extracted by the route candidate extraction means. The portable navigation device according to claim 2, wherein
The map data storage means includes road environment storage means for storing information relating to the surrounding environment of the road,
Road environment extraction means for extracting information on the surrounding environment of each road included in the route candidate extracted by the route candidate extraction means from the road environment storage means;
The portable route navigation characterized in that the route candidate display means determines a display mode of each line segment of the graph based on information about the surrounding environment of the road extracted by the road environment extraction means, and displays the graph. apparatus. The portable navigation device according to claim 2 or 3,
Facility information storage means for storing information about facilities existing in the road map;
A facility information extracting unit that extracts the facility existing within a predetermined distance from the route candidate extracted by the route candidate extracting unit from the facility information storage unit;
The portable route navigation apparatus, wherein the route candidate display means displays a symbol representing the facility extracted by the facility information extraction means on the graph. The portable navigation device according to claims 1 to 4,
The portable route navigation apparatus, wherein the route candidate display unit displays the route candidate extracted by the route candidate extraction unit so as to overlap the road map.

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