JP4861156B2 - Navigation system, portable terminal device, server device, portable terminal device program, server device program, and guidance start method - Google Patents

Description

  The present application relates to a navigation system, a portable terminal device, a server device, a program for a portable terminal device, a program for a server device, a program for a server device, and a guidance start method for guiding a pedestrian when walking and using a moving means other than walking. Technical field.

  Conventionally, a navigation system in which a GPS (Global Positioning System) receiver or the like is mounted on a portable terminal device such as a cellular phone, a map of the surrounding area including the current position of the pedestrian is displayed on the screen, and guidance to the destination is performed. It has been known.

  In such a navigation system, not only searching for a route when moving to the destination by walking alone, but also searching for a route when moving using a means other than walking such as a railroad or bus, for example, There have been proposed systems for guiding from the departure point to the boarding station, guiding from the getting-off station to the destination, and the like.

  For example, Patent Document 1 discloses a navigation device that performs a route search composed of section routes using a plurality of types of moving means such as walking and public transportation, and provides guidance for a section route instructed by a user. Has been.

  Further, Patent Document 2 selects a search for an optimum route to a normal destination, a route corresponding to a wheelchair, a route corresponding to a visually impaired person, or a shortest route, a specified time route, a favorite walking route, etc. A navigation system in which a search can be selected by a user is disclosed.

  In Patent Document 3, a straight line distance to a station is obtained, an average cost is calculated using the straight line distance as a variable, a station included in the cost range in which the average cost is designated, and a walking route is obtained. A traffic network search system for determination is disclosed.

Patent Document 4 searches for a boarding station and a getting-off station, searches for a rail route from the boarding station to the getting-off station, and from the departure point to the boarding station, from the boarding station to the getting-off station, and from the getting-off station to the destination An electronic device that displays a route that takes the shortest total time is disclosed.
JP 2005-114370 A JP 2002-286491 A JP 2000-258184 A JP-A-11-166838

  By the way, when pedestrians move to their destinations, they can only walk on foot rather than using non-walking means, such as when the distance to the destination is short or when it is easy to move on foot. The user may determine that it is appropriate to move. Also, even if you use a means of transportation other than walking, you can get to your destination a little earlier than walking alone, but it is reasonable to travel only on foot, considering the fare payment and the inconvenience of getting on and off. It may be judged that.

  However, in the conventional invention as described above, even if it is appropriate to move to the destination only on foot, not only the walking route but also the moving route including the use of moving means other than walking is selected. Since it is displayed on the screen and the user selects a desired route from these routes (for example, Patent Document 1), the user must perform an operation to select each time, and the guidance is not started immediately. There is a problem.

  The present application has been made in view of the above points. An example of the purpose of the present application is that it is appropriate that the pedestrian moves only by walking to the destination when the pedestrian moves by a moving means other than walking or walking. A navigation system, a portable terminal device, a server device, a portable terminal device program, a server device program, and a guidance start method capable of omitting complicated operations and shortening the time until the guidance start. It is to provide.

In order to solve the above-mentioned problem, the invention according to claim 1 is a navigation system that guides a pedestrian when a portable terminal device moves. A walking route that is a route that only moves on foot to a destination is provided. Search by at least one of the walking route searching means to search, the other route searching means for searching for another route that is a route including movement by a moving means other than walking to the destination, and the walking route searching means and the other route searching means. A selection screen display means for displaying a selection screen for selecting a route to be guided from among the displayed routes, a selection means used when a user selects a route according to the displayed selection screen, and the selection means and guide means for performing induction on the basis of the chosen route using a calculation means for calculating a required distance to the destination from the start of induction point, where the calculated Distance, a determination unit configured to determine whether less than move easily limit distance set as the upper limit of the distance is easy to move by walking, if required the calculated distance is less than the moving easily limit distance If determined, guidance control that causes the guidance means to start guidance to the destination based on the walking route searched by the walking route search means without displaying the selection screen by the selection screen display means. And means.

The invention according to claim 8 is the portable terminal device included in the navigation system according to any one of claims 1 to 7 , further comprising the selection screen display means, the selection means, and the guidance means. Features.

The invention according to claim 9 is the server device included in the navigation system according to claim 7 , wherein the walking route search means, the other route search means, the calculation means, the determination means, the guidance control means, and the Selection screen display request transmission means is provided.

According to a tenth aspect of the present invention, a computer is caused to function as the portable terminal device according to the eighth aspect.

According to an eleventh aspect of the present invention, a computer is caused to function as the server device according to the ninth aspect.

The invention according to claim 12 is a walking route for searching for a walking route that is a route that only moves on foot to a destination in a guidance starting method by a navigation system that performs guidance when a pedestrian moves with a portable terminal device. A route searched in at least one of a search step, another route search step for searching for another route that is a route including movement by a means other than walking to the destination, and the walking route search step and the other route search step. A selection screen display step for displaying a selection screen for selecting a route for guidance from among, a guidance step for performing guidance based on a route selected by a user using a selection unit according to the displayed selection screen, The calculation process for calculating the required distance from the guidance start point to the destination, and the calculated required distance is a distance that is easy to move on foot. In the set movement and ease upper distance less than a is whether the determination process, when required the calculated distance is determined to the be moved less than easy limit distance, the selection screen display process as omitting the display of the selection screen, and having a an induction control step of starting in the induction step of induction to a destination based on the walking route searched in the walking route searching step.

  Hereinafter, the best embodiment of the present application will be described in detail with reference to the drawings. In addition, embodiment described below is embodiment at the time of applying this invention with respect to the communication navigation system for pedestrians.

[1. First Embodiment]
[1.1 Outline of configuration and functions of communication navigation system for pedestrians]
First, the structure and outline | summary function of the communication navigation system S for pedestrians concerning 1st Embodiment are demonstrated using FIG.

  FIG. 1 is a diagram illustrating an example of a schematic configuration of a pedestrian communication navigation system S according to the first embodiment.

  As shown in FIG. 1, the communication navigation system S for pedestrians includes a server SV as an example of a server device and a plurality of mobile phones MP as an example of a portable terminal device.

  The server SV and the cellular phone MP can transmit and receive data to and from each other via a network NW as an example of a communication means (for example, using TCP / IP (Transmission Control Protocol / Internet Protocol) as a communication protocol) Data can be sent and received). The network NW is constructed by, for example, the Internet, a dedicated communication line (for example, a CATV (Community Antenna Television) line), a mobile communication network (including a wireless base station, etc.), a gateway, and the like.

  In the present embodiment, when the user operates the mobile phone MP to specify a desired destination, the server SV searches for a route from the current position of the mobile phone MP to the destination, and based on the searched route. The mobile phone MP guides to the destination while displaying a map around the current position on the screen.

  When searching for a route, the server SV searches for a route that can be moved only by foot to the destination, and uses a railroad (an example of a means of transportation other than walking) or travels in combination with the railroad and on foot. A search result screen 300 (see FIG. 8 (a): an example of a selection screen), which will be described later, is searched for a possible route and the search result is displayed on the mobile phone MP, and based on the route selected by the user according to the screen. The guidance is started by the mobile phone MP. When the server SV determines that it is appropriate to move to the destination only on foot, the display of the search result screen 300 is omitted, and the route that travels only on foot (hereinafter referred to as “walking route”). ) Based on the mobile phone MP.

  The mobile phone MP displays a map around a point designated by the user on the screen by executing a map display application program (hereinafter referred to as “map application”) downloaded from the server SV or the like, It is designed to guide you to the ground. Here, the cellular phone MP starts measuring the current position after the map application is activated and before the destination is set.

[1.2 Configuration and function of server SV]
Next, the configuration and function of the server SV will be described. FIG. 2 is a block diagram illustrating an example of a schematic configuration of the server SV according to the first embodiment.

  As shown in FIG. 2, the server SV is connected to a storage unit (for example, a hard disk) 11 as an example of a storage unit for storing various programs, data, and the like, and a network NW, and communicates with a mobile phone MP. A communication control unit 12 (for example, a network adapter) and a system control unit 13 including a CPU (Central Processing Unit), a RAM (Random Access Memory), a ROM (Read Only Memory), and the like, via a system bus 14 Are connected to each other.

  At this time, the system control unit 13 constitutes an example of a walking route search unit, another route search unit, a determination unit, a guidance control unit, a calculation unit, and a selection screen display request transmission unit according to the present application.

  The storage unit 11 displays a map on the screen of the mobile phone MP and stores map data used for route search by the server SV. This map data is composed of various data such as road data, railway network data, facility data, and background data. Each of these data is stored, for example, for each mesh obtained by dividing a map display target area into a substantially rectangular area at predetermined intervals in the latitude direction and the longitude direction, respectively.

  In addition, for each user who uses the mobile phone MP, the storage unit 11 includes a user ID (Identify) in which a spot registered as a user's favorite, recently searched spot information, a password, and the like are unique information for each user. ) And stored in association with each other.

  The road data includes, for example, road type of each link (road), identification information of a node (a road branching point, junction, intersection, etc., state change point, etc.) to which the link is connected, road number, road name, road shape And the like, link data for each node (latitude and longitude), node data for defining an identification number of a link connected to the node, and the like. The railway network data is composed of, for example, the names and coordinates of each station of the railway, the connection and departure times of the railway, the connection relationship of each station by the track, the name of the route, the time required for movement between stations, and the like. In addition, the facility data includes, for example, types, names, coordinates, shapes, and the like of facilities such as shopping streets, parks, stations, department stores, hospitals, schools, and factories.

  In the system control unit 13, the CPU reads and executes various programs such as a server device program stored in the ROM or the storage unit 11 to perform overall control of each unit of the server SV. It functions as search means, determination means, guidance control means, calculation means, selection screen display request transmission means, and the like.

  Specifically, the system control unit 13 searches for a walking route and a route including travel using a railroad (an example of another route) as a travel route to a destination designated by the user using the mobile phone MP. It is determined whether or not it is appropriate to move to the destination by walking route.

  More specifically, the system control unit 13 determines that it is appropriate to move on a walking route when there is no route including movement using a railroad as a candidate for walking guidance and only a walking route is extracted. . In addition, the system control unit 13 determines that the distance to the destination along the searched walking route (hereinafter referred to as “actual distance” (an example of a required distance)) is an upper limit distance that can be easily moved by walking (hereinafter referred to as “distance”). , And whether or not it is less than the “reference distance” (an example of an easy-to-move upper limit distance). If the actual distance is less than the upper limit, it is determined that it is appropriate to move on a walking route. To do.

  Here, in the introduction of real estate properties, properties that can be reached within 10 to 15 minutes on foot from a station or the like are often introduced as properties that are relatively close (within walking distance) from the station. Therefore, if the walking speed of a person is 80m / minute (the walking speed used to calculate the time required for walking in real estate properties), the distance that can be moved in 10-15 minutes is 800m-1,2km. Therefore, in this embodiment, 1 km is set as the reference distance. This reference distance is preset by, for example, an administrator of the server SV and stored in the storage unit 11.

  In addition, when the system control unit 13 does not determine that it is appropriate to move to the destination by walking route, the system controller 13 determines the time required for the searched route, each section (the section that travels on foot and the railway). The search result screen 300 is carried by causing the mobile phone MP to transmit search result information (an example of selection screen display request information) including the required time and distance of the moving section), the names and coordinates of the boarding and alighting stations, and the like. It is displayed on the telephone set MP.

  On the other hand, if the system control unit 13 determines that it is appropriate to move to the destination by the walking route, the system control unit 13 omits the transmission of the search result information and performs the walking route guidance instruction to perform the guidance based on the walking route. (Example of guidance start request information) is transmitted to the mobile phone MP.

  Note that the various programs may be downloaded from another server, for example, or may be recorded on a recording medium such as a CD-ROM and read via a drive.

[1.3 Configuration and function of mobile phone]
Next, the configuration and functions of the mobile phone MP will be described with reference to FIG.

  FIG. 3 is a block diagram showing an example of a schematic configuration of the mobile phone MP according to the first embodiment.

  As shown in FIG. 3, the mobile phone MP is connected to a mobile communication network by transmitting and receiving radio waves to and from the base station, and wireless communication for controlling communication with other mobile phones MP and servers connected to the network NW. A voice input unit 22 that has a microphone 21 and a D / A converter, for example, and generates voice data corresponding to the voice and outputs the voice data to the wireless communication unit 21 when a user's voice is input from the microphone. And, for example, an audio output unit 23 that includes a speaker, an amplifier circuit, etc., generates audio corresponding to the audio data supplied from the wireless communication unit 21, and produces sound through the speaker, Communication and data communication with a server or the like are possible. As such a communication method, for example, a PDC (Personal Digital Cellular) method, an IMT (International Mobile Telecommunication) method, a PHS (Personal Handyphone System) method, or the like is adopted.

  In addition, the cellular phone MP receives a display unit 24 (for example, a liquid crystal display) that displays information such as characters and images and an operation instruction from the user, and outputs the instruction content to the system control unit 28 as an instruction signal. An operation unit 25 (for example, a dial button, a cursor button, etc.) as an example of a selection unit, a storage unit 26 (for example, a flash) that stores various programs (for example, an operating system, a Web browser program, a map application, etc.), data, and the like. Memory).

  Further, the mobile phone MP receives a radio wave including a satellite orbit and time data transmitted from a GPS satellite, and calculates a current position (latitude and longitude) of the mobile phone MP based on the received radio wave. It has. The GPS positioning unit 27 starts positioning the current position under the control of the system control unit 28. Once the positioning is started, the GPS positioning unit 27 continues in parallel with other processing (including program execution) by the system control unit 28. Positioning.

  Furthermore, the cellular phone MP includes a system control unit 28 including a CPU (Central Processing Unit), a RAM (Random Access Memory), a ROM (Read Only Memory), and the like. The system control unit 28 and each unit have a system bus 29. Are connected to each other.

  At this time, the system control unit 28 constitutes an example of a selection screen display unit and a guidance unit according to the present application.

  The system control unit 28 is configured to control the entire mobile phone MP by reading and executing various programs stored in the ROM and the storage unit 26, and the system control unit 28 can be selected by executing the mobile application. It functions as screen display means, guidance means, and the like.

  Specifically, the system control unit 28 displays a top screen 100 (described later, FIG. 5A) of the map application by starting the map application.

  In addition, when the user selects to perform walking guidance (an example of guidance) using the operation unit 25 from the displayed top screen 100, the system control unit 28 selects a destination described later for navigation. A setting screen 200 (FIG. 5B described later) is displayed. At this time, the system control unit 28 outputs a positioning start command to the GPS positioning unit 27 via the system bus 29, and starts positioning of the current position by the GPS positioning unit 27.

  Then, when the destination is designated by the user using the operation unit 25, the system control unit 28 sets destination information indicating the name, latitude and longitude of the designated destination in the RAM, and the destination A route search request including ground information and current position information indicating the current position measured by the GPS positioning unit 27 is transmitted to the server SV.

  Further, when receiving the search result information transmitted from the server SV, the system control unit 28 displays the search result screen 300 based on the search result information. When the user selects a desired route using the operation unit 25 in accordance with the displayed search result screen 300, the system control unit 28 performs guidance to the destination or the boarding station based on the selected route. It is like that.

  Further, when receiving the walking route guidance instruction transmitted from the server SV, the system control unit 28 omits the display of the search result screen 300 and guides to the destination based on the walking route. .

  Note that various programs may be downloaded from, for example, the server SV or may be read from a recording medium such as a memory card.

[1.4 Operation of communication navigation system for pedestrians]
Next, the operation of the pedestrian communication navigation system S will be described.

[1.4.1 Operations from map application startup to route search request]
First, operations from starting the map application to requesting a route search will be described with reference to FIGS. 4 and 5.

  FIG. 4 is a flowchart illustrating a processing example from the start of the map application of the mobile phone MP according to the first embodiment to a request for a route search. 5A is a diagram showing a display example of the top screen 100, and FIG. 5B is a diagram showing a display example of the destination setting screen 200.

  As shown in FIG. 4, based on the operation of the operation unit 25 by the user, the system control unit 28 of the mobile phone MP activates the map application stored in the storage unit 26 (step S1). Thereafter, the system control unit 28 performs processing according to the program code of the map application.

  Next, the system control unit 28 displays the top screen 100 on the display unit 24 as shown in FIG. 5A (step S2). The top screen 100 is a main screen for displaying various menus of the map application, and is provided with various buttons for designating a point where a map is to be displayed, a simple navigation button 101, and the like. When the user designates an arbitrary place on the displayed map, the system control unit 28 sets the designated place as a destination for walking guidance.

  Here, when the user selects the simple navigation button 101 using the operation unit 25, the system control unit 28 detects selection of the button (step S3).

  Next, the system control unit 28 displays the destination setting screen 200 on the display unit 24 as shown in FIG. 5B (step S4), and outputs a positioning start command to the GPS positioning unit 27 (step S5). Then, acceptance of the destination designation operation by the user is started (step S6).

  The destination setting screen 200 is a submenu screen for setting a destination for walking guidance, and performs a search by inputting a button for searching for a spot around the current position, the name and address of the destination, and the like. There are provided an input form and a button, a button for selecting a destination from spots registered as user favorites, a button for selecting a destination from spots recently searched, and the like.

  Here, when the user performs a destination designation operation using the operation unit 25 and the destination designation is completed, the system control unit 28 ends the reception of the destination designation operation (step 7), and the designation. Based on the operation, the destination information is set on the RAM (step S8).

  Next, the system control unit 28 determines whether or not the current position is measured by the GPS positioning unit 27, for example, by referring to whether or not the current position information is set on the RAM (step S9). The determination process is repeated until the position is measured (step S9: NO). In addition, when the current position has been measured at the time of step S8 (step S9: YES), the determination process is not repeated, and the process proceeds to step S10.

  On the other hand, the GPS positioning unit 27 is activated when a positioning start command is supplied from the system control unit 28 (step S31), and starts positioning of the current position (step S32). For example, the GPS positioning unit 27 completes positioning in about 10 seconds (step S33), and sets the current position information indicating the latitude and longitude of the current position on the RAM of the system control unit 28 (step S34). Thereafter, the GPS positioning unit 27 repeats the processes of steps S32 to S34.

  When the system control unit 28 determines in step S9 that the current position has been measured (step S9: YES), the system control unit 28 transmits a route search request including the destination information and the current position information to the server SV (step S10).

[1.4.2 Operations from route search to guidance start]
Next, operations from route search to guidance start will be described with reference to FIGS.

  FIG. 6 is a flowchart illustrating a processing example in the route search processing of the system control unit 13 of the server SV according to the first embodiment. FIG. 7 is a flowchart showing an example of processing from the request for route search to the start of guidance by the system control unit 28 of the mobile phone MP according to the first embodiment. Similar elements are denoted by the same reference numerals. 8A is a diagram illustrating a display example of the search result screen 300, and FIG. 8B is a diagram illustrating a display example of the walking guidance screen 400.

  First, the route search process of the system control unit 13 of the server SV will be described.

  As shown in FIG. 6, when the system control unit 13 of the server SV receives a route search request transmitted from the mobile phone MP (step S41), it performs a normal route search (step S42). Specifically, the system control unit 13 determines a route including the walking route and the use of the railroad as a route from the current location to the destination indicated by the current position information and the destination information set in the request based on the map data. Explore.

  Next, the system control unit 13 determines whether or not there is a walking route as a candidate for walking guidance (step S43), and if there is no walking route (step S43: NO), generates search result information, The search result information is transmitted to the mobile phone MP (step S44), and the route search process is terminated.

  On the other hand, if there is a walking route as a candidate for walking guidance (step S43: YES), the system control unit 13 determines whether there is a route including the use of the railroad as a candidate for walking guidance (step S43). S45). At this time, if there is no route including the use of the railway (step S45: NO), the system control unit 13 proceeds to step S50.

  On the other hand, when there is a route including the use of the railroad as a candidate for walking guidance (step S45: YES), the system control unit 13 calculates an actual distance from the current position to the destination (step S46).

  Next, the system control unit 13 determines whether or not the calculated actual distance to the destination is less than 1 km (step S47), and if not less than 1 km (step S47: NO), search result information Is transmitted to the mobile phone MP (step S44), and the route search process is terminated.

  On the other hand, when the actual distance to the destination is less than 1 km (step S47: YES), the system control unit 13 determines whether or not there are a plurality of walking routes (step S48), and there are a plurality of walking routes. In this case (step S48: YES), the walking route with the shortest actual distance is selected from the plurality of walking routes (step S49), and the process proceeds to step S50.

  On the other hand, when there is only one walking route (step S48: NO), the system control unit 13 selects the walking route and proceeds to step S50.

  In step S50, the system control unit 13 transmits a walking route guidance instruction for the selected walking route to the mobile phone MP, and ends the route search process.

  Next, processing from the request for route search to the start of guidance by the system control unit 28 of the mobile phone MP will be described.

  As shown in FIG. 7, when the system control unit 28 of the mobile phone MP transmits a route search request to the server SV (step S10), the system control unit 28 determines whether a message is received from the server SV (step S11). Is received (step S11: YES), when the received message is displayed on the screen by the display unit 24 (step 12), the process proceeds to step S11.

  On the other hand, when the message is not received (step S11: NO), the system control unit 28 determines whether the search result information is received from the server SV (step S13). At this time, when the search result information is received (step S13: YES), the system control unit 13 displays the search result screen 300 based on the search result information as shown in FIG. 8A. 24 is displayed (step S14).

  On the search result screen 300, route information 301 and 302 relating to the route searched by the server SV is displayed for each route. For example, as the route information 301 of the walking route, the required time to the destination, the name of the departure place and the destination, the travel distance of the section from the departure place to the destination, the required time, etc. are displayed. Corresponding to the sections up to, a guidance button 303 is displayed. The route information 302 including the use of the railway includes the departure point, the relay station including the boarding station and the departure station, the names of the destinations, and the travel distance in each section divided by the relay station (in the case of walking). The required time and the like are displayed, and guidance buttons 303 are displayed respectively corresponding to the sections that are moved on foot (for example, the section from the departure point to the boarding station and the section from the departure station to the destination).

  Although not shown, the system control unit 28 stores the search result information in the storage unit 26 so that the search result screen 300 of the result of the previous search can be displayed again. As a result, for example, after the walk guidance from the departure point to the boarding station is over, the map application is temporarily terminated, and when the application is restarted after arriving at the getting-off station, it is possible to get off without performing a route search again. You can easily and quickly start walking from the station to your destination.

  Next, the system control unit 28 determines whether any guidance button 303 is selected (step S15), and repeats the determination process until any guidance button 303 is selected (step S15: NO). ).

  Here, when the user selects any one of the guidance buttons 303 using the operation unit 25 (step S15: YES), the system control unit 28 displays the walk guidance screen 400 as shown in FIG. 8B. The information is displayed on the unit 24, and the walking guidance process based on the selected route is started.

  Specifically, the system control unit 28 displays a map around the current position on the screen based on the map data received from the server SV, and sets the current position mark 401 indicating the current position at the center of the screen. In addition, the system control unit 28 displays a linear distance 402 from the current position to the destination on the screen, and displays an arrow 403 indicating the direction of the destination from the current position. The method for displaying the distance from the current position to the destination and the method for displaying the direction of the destination are not limited to this.

  Then, in response to the movement of the user with the mobile phone MP, while acquiring necessary map data by sending a request to the server SV as needed based on the current position information measured by the GPS positioning unit 27, While scrolling the background map, the display of the straight line distance 402 and the arrow 403 is dynamically updated. At this time, when the system control unit 28 displays the linear distance 402 so that the user can grasp the approximate distance to the destination without staring at the screen, the linear distance to the destination is less than 40 m. Is displayed in red, and is displayed in orange when the straight line distance to the destination is 40 m or more and less than 1 km, and is displayed in blue when the straight line distance to the destination is 1 km or more.

  Further, every time the user moves 10 m, the system control unit 28 displays a trajectory mark 404 indicating the trajectory moved by the user on the screen. Further, when there is a destination on the screen, the system control unit 28 displays the destination on the screen as the destination flag 405. Then, when the linear distance to the destination approaches 40 m, the system control unit 28 vibrates the vibrator and displays a message “near the destination” on the screen.

  On the other hand, if the search result information is not received in step S13 (step S13: NO), the system control unit 28 determines whether or not a walking route guidance instruction is received from the server SV (step S17). . At this time, when the system control unit 13 has not received the walking route guidance instruction (step S17: NO), the system control unit 13 proceeds to step S11, and when the walking route guidance instruction is received, the search result screen 300 is displayed. Without displaying, the walking guidance process based on the walking route is started in the same manner as in step S16 (step S18).

[1.4.3 Dynamic display of distance from the current position to any position]
Next, the operation when the map is scroll-displayed by the user's cursor key operation and the linear distance from the current position to an arbitrary position is dynamically displayed will be described with reference to FIGS.

  FIG. 9 is a diagram illustrating a processing example in the distance dynamic display processing from the current position to an arbitrary position by the user operation of the system control unit 28 of the mobile phone MP according to the first embodiment. FIG. 10 is a view showing a display example of the walking guide screen 400 when the linear distance from the current position to an arbitrary position is dynamically displayed. In FIG. 10, the same elements as those in FIG. Are given the same reference numerals.

  As illustrated in FIG. 9, the system control unit 28 determines whether any cursor key is pressed (pressed down) while executing the walking guidance process (step S61). If the cursor key is not pressed (step S61: NO), the walking guidance process is continued.

  On the other hand, when any of the cursor keys is pressed (step S61: YES), the system control unit 28 sets the longitude X0 and the latitude Y0 of the current position information as variables Xi and Yi, respectively (step S62). .

  Next, the system control unit 28 determines which cursor key is the pressed cursor key (step S63). At this time, when the up cursor key is pressed (step S63: up key), the system control unit 28 sets Yi to the latitude obtained by adding ΔY corresponding to the latitude change by the map scroll to Yi. When the down cursor key is pressed (step S63: down key), the latitude obtained by subtracting ΔY from Yi is set to Yi (step S65), and the left cursor key is pressed. If it has been done (step S63: left key), the latitude obtained by adding ΔX of the longitude change due to the map scroll to Xi is set to Xi (step S66), and the right cursor key is pressed (Step S63: right key), the latitude obtained by subtracting ΔX from Xi is set to Xi (step S67).

  The system control unit 28 that has finished any of the processes in steps S64 to S67 calculates the distance L from the current position indicated by X0 and Y0 to the position indicated by Xi and Yi by the following equation (1) (step 1). S68).

次いで、システム制御部２８は、経度Ｘｉ及び緯度Ｙｉを中心とする地図を画面に表示し（ステップＳ６９）、算出した距離Ｌを直線距離４０６として、図１０に示すように画面に表示する（ステップＳ７０）。このとき、システム制御部２８は、任意の位置Ｘｉ及びＹｉを示す位置マーク４０７を画面の中央に表示するとともに、再開ボタン４０８を表示する。

Next, the system control unit 28 displays a map centered on the longitude Xi and the latitude Yi on the screen (step S69), and displays the calculated distance L as a straight line distance 406 on the screen as shown in FIG. S70). At this time, the system control unit 28 displays a position mark 407 indicating arbitrary positions Xi and Yi at the center of the screen and also displays a resume button 408.

  Next, the system control unit 28 determines whether or not the cursor key is pressed (step S71). If the cursor key is pressed (step S71: YES), the system control unit 28 proceeds to step S63.

  On the other hand, when the cursor key is not pressed (step S71: NO), the system control unit 28 determines whether or not the resume button 408 is selected by the user (step S72). At this time, if the restart button 408 is not selected (step S72: NO), the system control unit 13 proceeds to step S71.

  In this manner, the system control unit 28 repeats the processes of steps S63 to S72, thereby scrolling and displaying the map according to the operation of the cursor key by the user and starting from the current position (positions indicated by X0 and Y0). The straight line distance to the center position (the position indicated by Xi and Yi) of the map displayed on the screen is dynamically displayed.

  When the user operates the operation unit 25 and selects the resume button 408 (step S72: YES), the system control unit 28 displays a map centered on the current positions X0 and Y0, for example, FIG. 8B. Is displayed on the screen (step S73), and the process returns to the normal walking guidance process.

  As described above, according to the present embodiment, the system control unit 13 of the server SV searches for a walking route, searches for a route including movement using a railroad to the destination, and based on the search result. When the search result information is transmitted to the mobile phone MP, the system control unit 28 of the mobile phone MP displays the search result screen 300 based on the search result information, and when a route is selected by the user using the operation unit 25. The walking guidance is performed based on the selected route. Here, the system control unit 13 of the server SV determines whether or not it is appropriate to move on the walking route, and if it is determined that moving on the walking route is appropriate, the search result information The mobile phone MP transmits the walking route guidance instruction to the mobile phone MP, and when the system control unit 28 of the cellular phone MP receives the walking route guidance instruction, the walking guidance based on the walking route searched by the server SV is given. It is supposed to start.

  Therefore, when it is appropriate to move to the destination by walking only after the destination is set, the walking guidance based on the walking route is started without displaying the search result screen 300. The complicated operation of selecting a route on the screen 300 is omitted, and the time until the start of walking guidance can be shortened.

  Further, the system control unit 13 of the server SV calculates the actual distance of the walking route from the current position to the destination, and the actual distance is less than the reference distance that is the upper limit distance that can be easily moved by walking. In this case, it is determined that it is appropriate to move on a walking route, and a walking route guidance instruction is transmitted to the mobile phone MP. By omitting it, the time until the start of walking guidance can be shortened.

  In addition, as a result of route search, the system control unit 13 of the server SV indicates that it is appropriate to move on a walking route when a route including movement using a railroad is not extracted as a candidate for walking guidance. Judgment is made and a walking route guidance instruction is transmitted to the mobile phone MP, and when it is obviously appropriate to move on a walking route, unnecessary operations can be omitted, and the time to start walking guidance can be shortened. .

  In addition, when the system control unit 28 of the mobile phone MP activates the map application and performs a destination designation operation by the user using the operation unit 25, the destination information is set in the RAM based on the designation operation. The GPS positioning unit 27 starts measuring the current position of the mobile phone MP in parallel with the execution of the map application before setting the destination information, and the set destination is set from the current position measured by the GPS positioning unit 27. Since the walking guidance to the destination indicated by the location information is performed, the measurement waiting time at the current position is shortened, and the walking guidance can be started quickly.

  Further, the system control unit 28 of the mobile phone MP displays the top screen 100 when the map application is activated, and displays the destination setting screen 200 when the simple navigation button 101 on the screen is selected by the user. At this time, since the GPS positioning unit 27 starts measuring the current position of the mobile phone MP, the GPS positioning unit 27 starts measuring the current position when the possibility of performing the walking guidance becomes high. It is possible to prevent the battery (electric power) of the mobile phone MP from being wasted due to the positioning because the walking guidance was not performed even though the positioning was performed.

  Conventionally, in a mobile phone, one of the reasons for not measuring the current position before the destination is set may be to minimize battery consumption due to the measurement of the current position. According to this, it is possible to suppress wasteful consumption of the battery while reducing the measurement waiting time at the current position.

  In the first embodiment described above, the timing for starting the positioning of the current position by the GPS positioning unit 27 is set to the time when the destination setting screen 200 is displayed, but the positioning is started at a timing other than this. Also good. For example, the simple navigation button 101 may be selected. Further, it may be the time when the start of the input of the destination by the user is detected with more certainty that the walking guidance is performed. In addition, when the map application is activated, it may be a point in time when a map of a point designated by the user is displayed.

  Further, from the viewpoint of shortening the waiting time for starting the walking guidance, the timing for starting the positioning of the current position may be from when the map application is started until before the destination is set.

  Further, in the case where activation of the GPS positioning unit 27 and start of positioning are performed by separate commands, for example, the system control unit 28 activates the GPS positioning unit 27 when the simple navigation button 101 is selected by the user. It may be controlled to start the GPS positioning unit 27 and start positioning at different timings, such as starting and positioning when the destination setting screen 200 is displayed.

[2. Second Embodiment]
Next, a second embodiment will be described with reference to FIG.

  FIG. 11 is a flowchart illustrating a processing example in the route search processing of the system control unit 13 of the server SV according to the second embodiment.

  In the first embodiment described above, the system control unit 13 of the server SV first searches for both the walking route and the route including the use of the railway in the route search process, but the second described below. In the embodiment, when it is determined that it is appropriate to move to the destination by walking route, only the walking route is searched.

  As shown in FIG. 11, upon receiving a route search request transmitted from the mobile phone MP (step S91), the system control unit 13 of the server SV first calculates a linear distance from the current position to the destination (step S91). S92).

  Next, the system control unit 13 determines whether or not the calculated linear distance to the destination is less than 800 m (step S93), and if not less than 800 m (step S93: NO), the normal route A search is performed (step S94), search result information is transmitted to the mobile phone MP (step S95), and the route search process is terminated.

  On the other hand, if the system control unit 13 determines that the calculated linear distance to the destination is less than 800 m (step S93: YES), the system control unit 13 searches only the walking route (step S96).

  In the present embodiment, it is determined whether or not it is appropriate to walk to the destination before the route search, so the actual distance to the destination is not known at the time of step S93. Therefore, the distance to the destination was calculated as a straight line distance. Also, since the walking route is not always a straight line to the destination, it is assumed that the actual distance is 1.5 times the straight distance, and the distance that can be moved in 15 minutes is 1/3 of the distance of 1,2 km, which is 800 m Was set as the reference distance.

  Next, the system control unit 13 determines whether or not there is a walking route (step S97). If there is no walking route (step S97: NO), the system control unit 13 performs a normal route search (step S98), and the search result. Information is transmitted to the mobile phone MP (step S99), and the route search process is terminated.

  On the other hand, when there is a walking route (step S97: YES), the system control unit 13 determines whether there are a plurality of walking routes (step S100). At this time, when there are a plurality of walking routes (step S100: YES), the system control unit 13 selects the walking route with the shortest actual distance from the plurality of walking routes (step S101), and the process proceeds to step S102. Transition.

  On the other hand, when there is only one walking route (step S100: NO), the system control unit 13 selects the walking route and proceeds to step S102.

  In step S102, the system control unit 13 transmits a walking route guidance instruction for the selected walking route to the mobile phone MP, and ends the route search process.

  As described above, according to the present embodiment, as in the first embodiment, if the distance is easy to move to the destination on foot, the complicated operation is omitted and the walking guidance starts. Time can be shortened.

  If the system control unit 13 of the server SV determines that it is appropriate to move on a walking route, it omits transmission of search result information and omits searching for a route including movement using a railway. Since the walking route guidance instruction is transmitted to the mobile phone MP, the time required for the route search is shortened, and the time until the start of the walking guidance can be further shortened.

  In addition, the system control unit 13 of the server SV calculates a linear distance from the current position to the destination, and determines whether the linear distance is less than the reference distance, so that it is appropriate to move on a walking route. Therefore, it is possible to reduce the calculation time compared with the actual distance and to further shorten the time until the start of walking guidance.

[3. Third Embodiment]
Next, 3rd Embodiment is described using FIG.12 and FIG.13.

  FIG. 12 is a flowchart illustrating a processing example in the route search processing of the system control unit 13 of the server SV according to the third embodiment. FIG. 13 is a diagram for explaining a method for calculating the allowable distance when there is a shopping street between the current location and the destination.

  In each of the embodiments described above, the system control unit 13 of the server SV fixes the reference distance used to determine whether or not it is appropriate to move to the destination by a walking route in the route search process. The third embodiment described below is an embodiment in which a reference distance is set based on user information. Further, in each of the embodiments described above, the search result screen 300 is always displayed when the actual distance or straight line distance to the destination exceeds the reference distance. However, the third embodiment described below is used. The form is an embodiment in the case where it is further determined whether it is appropriate to move to the destination by a walking route based on the facility data and the straight line distance to the destination.

  In the present embodiment, the storage unit 11 of the server SV stores user information related to a user who uses the mobile phone MP. User information includes, for example, the user's name, gender, and age information (for example, information indicating age and age (for example, infants, school children, junior high school students, high school students, adults, working adults, youth, middle-aged, elderly, etc.)) Physical strength information (for example, body type, physical strength, exercise frequency), priority flag, and the like are stored in association with the user ID (Identify). Here, the priority flag is information indicating whether or not to preferentially select a walking route when performing a route search.

  This user information can be input by the user when the map application is activated for the first time in the mobile phone MP, for example. Then, the system control unit 28 of the mobile phone MP transmits the input user information to the server SV, and the system control unit 13 of the server SV stores the received user information in the storage unit 11 in association with the user ID. .

  Then, the system control unit 13 calculates a reference distance based on the stored user information, and stores the reference distance in the storage unit 11 in association with the user ID.

  As a method for calculating the reference distance, for example, depending on gender, a longer (for example, 1.2 km) is set for a male and a shorter (for example, 800 m) is set for a female. May be set according to the physical strength information. Further, the reference distance may be set by comprehensively considering these pieces of information.

  Next, route search processing will be described.

  As shown in FIG. 12, when the system control unit 13 of the server SV receives the route search request transmitted from the mobile phone MP (step S111), first, it calculates a linear distance from the current position to the destination (step). S112).

  Next, the system control unit 13 reads a reference distance corresponding to the user ID of the user of the mobile phone MP from the storage unit 11 and determines whether or not the calculated linear distance to the destination is less than the reference distance ( If the distance is not less than the reference distance (step S113: NO), the process proceeds to step S114. If the distance is less than the reference distance (step S113: YES), the process proceeds to step S124.

  In step S114, the system control unit 13 determines whether or not the priority flag set in the user information corresponding to the user ID of the user of the mobile phone MP has a walk priority (step S114). In the case (step S114: YES), the process proceeds to step S115, and when it is not the foot priority (step S114: NO), the process proceeds to step S116.

  In step S115, the system control unit 13 determines whether or not the linear distance to the destination is 2.5 km or more, and if it is 2.5 km or more (step S115: YES), the process proceeds to step S116. If it is not 2.5 km or more (step S115: NO), the process proceeds to step S119. It should be noted that 2.5 km is a distance that is assumed to be apparently not suitable for walking when the distance is longer than this.

  In step S116, the system control unit 13 transmits a message “not within walking distance” to the mobile phone MP. Thus, the message is displayed on the screen by the mobile phone MP (see step S12 in FIG. 7).

  Next, the system control unit 13 performs a normal route search (step S117), transmits search result information to the mobile phone MP (step S118), and ends the route search process.

  In this way, even if priority is given to walking, the system control unit 13 always displays the search result screen 300 when it is determined that the straight line distance to the destination is clearly not suitable for walking. Process as follows.

  On the other hand, if it is not 2.5 km or more in step S115, the system control unit 13 determines whether or not there is a shopping street between the current position and the destination (step S119). Specifically, the system control unit 13 refers to the facility data included in the map data. For example, as shown in FIG. 13, is the shopping street Sd on the straight line PsPd from the current value Ps to the destination Pd? Determine whether or not. As a result, when there is no shopping street between the current location and the destination (step S119: NO), the system control unit 13 proceeds to step S122.

  On the other hand, when there is a shopping street between the current position and the destination (step S119: YES), the system control unit 13 calculates an allowable distance. Here, the allowable distance refers to a distance that is assumed that the straight line distance to the destination is not less than the reference distance but can be moved relatively easily even on foot. Specifically, the system control unit 13 calculates the allowable distance Lp by the following equation (2).

ここで、Ｋは１未満の係数であり、Ｌａｂは、図１３に示す直線ＰｓＰｄ上における商店街の始点Ｐａから終点Ｐｂまでの距離であり、Ｌｓは基準距離である。

Here, K is a coefficient less than 1, Lab is a distance from the start point Pa to the end point Pb of the shopping street on the straight line PsPd shown in FIG. 13, and Ls is a reference distance.

  Next, the system control unit 13 determines whether or not the straight line distance to the destination is less than the calculated allowable distance (step S121), and when it is not less than the allowable distance (step S121: NO), The process proceeds to step S122, and if it is less than the allowable distance (step S121: YES), the process proceeds to step S124.

  When there is a shopping street between the current location and the destination, the user is likely to pass through the shopping street when moving to the destination on foot. When passing through a shopping street, the user may take actions such as looking at various stores or looking at what is being sold at the store. When walking in the shopping street in this way, the user feels that the walking time (or distance) is shorter than usual due to eye rejuvenation, stimulation, etc., and the user feels down and less fatigued it is conceivable that.

  Therefore, the system control unit 13 is a shopping street that the user is supposed to walk on if there is a shopping street between the current location and the destination even if the straight line distance to the destination is equal to or greater than the reference distance. If the linear distance to the destination is less than the allowable distance, it is determined that it is appropriate to move to the destination by walking route, and the search result screen 300 is displayed by the mobile phone MP. The processing is performed so that the walking guidance processing based on the walking route is performed.

  In the present embodiment, only the shopping street is the object of determination, but for example, a park, a promenade, a specialty shopping street, or the like may be determined.

  If the linear distance to the destination is not less than the allowable distance in step S121, the system control unit 13 determines whether there is a rest facility such as a coffee shop or a park between the current position and the destination. (Step S122). Specifically, as in step S119, it is determined whether there is a resting facility on the straight line PsPd shown in FIG. As a result, when there is no rest facility between the current location and the destination (step S122: NO), the system control unit 13 performs a normal route search (step S125), and sends the search result information to the mobile phone MP. This is transmitted (step S126), and the route search process is terminated.

  On the other hand, when there is a resting facility between the current location and the destination (step S122: YES), the system control unit 13 proceeds to step S123.

  In this way, even if the straight distance to the destination is greater than the reference distance, if there is a resting facility on the way, if you move while taking a break at the resting facility, you can move relatively easily on foot. It is done. Therefore, even if the linear distance to the destination is greater than or equal to the reference distance, the system control unit 13 is appropriate to move to the destination by a walking route if there is a rest facility between the current location and the destination. The display of the search result screen 300 is omitted by the mobile phone MP, and the process is performed so that the walking guidance process based on the walking route is performed.

  On the other hand, if the straight-line distance to the destination is greater than the reference distance and there is no resting facility between your current location and your destination, it ’s not easy to walk to your destination, The system control unit 13 performs a normal route search and performs a process so that the search result screen 300 is displayed.

  In steps S123 to S129, the system control unit 13 searches for the walking route only in the same manner as in steps S96 to S102 of FIG. 11, and if there is no walking route, transmits the search result information to the mobile phone MP. If there is a walking route, a walking route guidance instruction is transmitted to the mobile phone MP.

  In the present embodiment, when there are two adjacent bus stops on the route bus operation between the current position and the destination during the walking guidance processing by the mobile phone MP, for each bus stop, A symbol indicating a bus stop is displayed on the walking guide screen 400.

  Specifically, the system control unit 13 of the server SV has two adjacent bus stops in an area surrounded by an ellipse whose major axis is a straight line from the current position to the destination and whose minor axis is 0.1 km, for example. Is determined based on the facility data, and if there are two adjacent bus stops in the area, the bus stop symbol is embedded in the map data and transmitted to the mobile phone MP.

  Thus, by displaying the bus stop on the map, the user can know on the way of walking that he can get on the bus and move to the vicinity of the destination.

  As described above, according to the present embodiment, in addition to the effect of the operation of the second embodiment, the system control unit 13 of the server SV calculates the reference distance based on the user information stored in the storage unit 11. Since it calculates, the reference distance suitable for a user's physical strength etc. can be set for every user.

  Further, the system control unit 13 of the server SV extracts facilities existing from the current position to the destination based on the map data, and when the distance from the current position to the destination is equal to or larger than the reference distance, Based on the distance and the type of facility extracted, it is determined whether or not it is appropriate to move by walking route. For example, when moving to the destination on foot, the facility can be viewed by the user to reach the destination. It is possible to determine whether or not it is appropriate to move on a walking route in consideration of a situation where the distance of the user feels short or that the user can take a break on the way.

  In the third embodiment described above, the reference distance is set based on the user information. However, for example, a reference distance specified by the user may be set. The reference distance may be set in consideration of the current weather and climate. Specifically, for example, the user inputs the weather using the cellular phone MP, or the server SV acquires the weather information of the current position or the destination from a predetermined server device or the like, and in the server SV, for example, If the weather is fine, 1 km is set as the reference distance, and if it is raining, 500 m is set as the reference distance.

  In this embodiment, when determining whether there is a shopping street or a resting facility between the current position and the destination, these facilities are located on a straight line from the current position to the destination. For example, as in the first embodiment, if a route search is first performed, it may be determined whether or not these facilities are on the walking route. good. At this time, the distance to the start point Pa and the end point Pb of the shopping street may be calculated along the walking route.

  Further, in this embodiment, when walking is prioritized, it is determined whether there is a shopping street or a resting facility between the current position and the destination. For example, walking is prioritized. If the distance to the destination is less than 2.5 km, a walking route guidance instruction may be transmitted, or if the distance to the destination is less than 2.5 km, even if priority is not given to walking Alternatively, it may be determined whether there is a shopping street or a resting facility between the current position and the destination, and a walking route guidance instruction or search result information may be transmitted based on the determination result.

  Further, in each of the above embodiments, the walking route guidance instruction is transmitted when the actual distance or straight distance to the target is less than the reference distance. However, the actual distance or straight distance is the same as the reference distance. Even if there is, a walking route guidance instruction may be transmitted.

  In each of the above embodiments, the railway is applied as a moving means other than walking, but other moving means such as a route bus, a liner, a private car, a taxi, an aircraft, etc. may be applied.

  In each of the above embodiments, the route search is performed by the server SV and it is determined whether or not it is appropriate to move on a walking route. For example, map data is stored in the mobile phone MP and the mobile phone is stored. A route search may be performed by the telephone set MP to determine whether or not it is appropriate to move on a walking route. In this case, the server SV is not essential due to the system configuration.

  In each of the above embodiments, the mobile phone is applied to the mobile terminal device, but other mobile terminal devices such as a PDA (Personal Digital Assistant) may be applied.

It is a figure which shows an example of schematic structure of the communication navigation system S for pedestrians concerning 1st Embodiment. It is a block diagram which shows an example of schematic structure of the server SV which concerns on 1st Embodiment. It is a block diagram which shows an example of schematic structure of mobile telephone MP which concerns on 1st Embodiment. It is a flowchart which shows the process example from starting of the map application of the mobile telephone MP which concerns on 1st Embodiment until it requests | requires a route search. (A) is a figure which shows the example of a display of the top screen 100, (b) is a figure which shows the example of a display of the destination setting screen 200. It is a flowchart which shows the process example in the route search process of the system control part 13 of server SV which concerns on 1st Embodiment. It is a flowchart which shows the process example from the system control part 28 of the mobile telephone MP which concerns on 1st Embodiment to the start of guidance after requesting a route search. (A) is a figure which shows the example of a display of the search result screen 300, (b) is a figure which shows the example of a display of the walk guidance screen 400. It is a figure which shows the process example in the distance dynamic display process from the current position by user operation to arbitrary positions of the system control part 28 of the mobile telephone MP which concerns on 1st Embodiment. It is a figure which shows the example of a display of the walk guidance screen 400 in the case of displaying dynamically the linear distance from the present position to arbitrary positions. It is a flowchart which shows the process example in the route search process of the system control part 13 of the server SV which concerns on 2nd Embodiment. It is a flowchart which shows the process example in the route search process of the system control part 13 of server SV which concerns on 3rd Embodiment. It is a figure explaining the method of calculating allowable distance, when there is a shopping street between the present location and the destination.

Explanation of symbols

11 Memory unit
12 communication unit 13 system control unit 14 system bus 21 wireless communication unit 22 audio input unit 23 audio output unit 24 display unit 25 operation unit 26 storage unit 27 GPS positioning unit 28 system control unit 29 system bus MP cellular phone SV server S pedestrian Communication navigation system

Claims (12)

In a navigation system that performs guidance when a pedestrian moves with a portable terminal device,
A walking route search means for searching a walking route that is a route that only moves on foot to the destination,
Other route search means for searching for another route that is a route including movement by means other than walking to the destination,
A selection screen display means for displaying a selection screen for selecting a route to be guided from at least one of the walking route search means and the other route search means;
Selection means used when a user selects a route according to the displayed selection screen;
Guidance means for performing guidance based on the route selected using the selection means;
A calculation means for calculating a required distance from the guidance start point to the destination;
Determination means for determining whether or not the calculated required distance is less than an easy movement upper limit distance set as an upper limit of a distance that is easy to move by walking ;
When it is determined that the calculated required distance is less than the easy movement upper limit distance , the walking route searched by the walking route searching means is omitted without displaying the selection screen by the selection screen displaying means. Guidance control means for causing the guidance means to start guidance to a destination based on:
A navigation system comprising: The navigation system according to claim 1,
When it is determined that the calculated required distance is less than the easy movement upper limit distance , the guidance control unit omits the display of the selection screen and searches for the other route by the other route search unit. The navigation system is characterized in that the guidance means starts the guidance to the destination based on the walking route.   The navigation system according to claim 1 or 2,
  The navigation system according to claim 1, wherein the calculation means calculates a straight line distance from the guidance start point to the destination as the required distance.   The navigation system according to any one of claims 1 to 3,
  Storage means for storing user information about the user;
  A navigation system, further comprising: a setting unit that sets the upper limit distance for easy movement based on the stored user information.   The navigation system according to any one of claims 1 to 4,
  A facility extraction means for extracting facilities existing between the guidance start point and the destination;
  When the required distance exceeds the easy movement upper limit distance, the determination means omits display of the selection screen based on the required distance and the type of the extracted facility, and enters the walking route. A navigation system for determining whether or not to cause the guidance means to start guidance based on a destination.   The navigation system according to any one of claims 1 to 5,
  The guidance control means omits the display of the selection screen and guides to the destination based on the walking path when there is no other path as a candidate for guidance as a result of the search by the other path search means. A navigation system, characterized in that the navigation means is started.   The navigation system according to any one of claims 1 to 6,
  The navigation system includes the portable terminal device and a server device to which the portable terminal device can be connected via communication means.
  The server device
  The walking route search means, the other route search means, the calculation means, the determination means, and the guidance control means;
  Selection screen display request transmission means for transmitting selection screen display request information indicating a request for display of the selection screen to the portable terminal device, and
  The portable terminal device is:
  The selection screen display means, the selection means and the guidance means,
  The selection screen display means of the portable terminal device displays the selection screen based on the selection screen display request information transmitted from the server device,
  When it is determined that the calculated required distance is less than the easy movement upper limit distance, the guidance control means of the server device transmits the selection screen display request information by the selection screen display request transmission means. Omit, send guidance start request information indicating a request to start guidance to the destination based on the walking route to the portable terminal device,
  The navigation system according to claim 1, wherein the guidance unit of the portable terminal device starts guidance to a destination based on the walking route based on the guidance start request information transmitted from the server device.   The portable terminal device included in the navigation system according to any one of claims 1 to 7,
  A portable terminal device comprising the selection screen display means, the selection means, and the guidance means.   In the server apparatus included in the navigation system according to claim 7,
  A server device comprising: the walking route searching means, the other route searching means, the calculating means, the determining means, the guidance control means, and the selection screen display request transmitting means.   A program for a portable terminal device that causes a computer to function as the portable terminal device according to claim 8.   A computer program for causing a computer to function as the server device according to claim 9.   In a guidance start method by a navigation system that performs guidance when a pedestrian moves with a portable terminal device,
  A walking route search process that searches for a walking route that is a route that only moves on foot to the destination,
  Another route search step for searching for another route which is a route including movement by means of transportation other than walking to the destination,
  A selection screen display step for displaying a selection screen for selecting a route for guidance from routes searched in at least one of the walking route search step and the other route search step;
  A guidance step of performing guidance based on a route selected by a user using a selection unit according to the displayed selection screen;
  A calculation process for calculating the required distance from the guidance start point to the destination;
  A determination step of determining whether the calculated required distance is less than an easy movement upper limit distance set as an upper limit of a distance that is easy to walk;
  When it is determined that the calculated required distance is less than the easy movement upper limit distance, the display of the selection screen in the selection screen display step is omitted, and the walking route searched in the walking route search step A guidance control step for starting guidance in the guidance step to a destination based on
  A method for initiating induction, comprising:

Images