JP2007017241A - Navigation system, method and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance precision for a route guide to a business facility serving as a destination, and to quickly arrive at the destination, for a manager of a railway, electricity, city water, gas, a telephone, a road or the like. <P>SOLUTION: A route display part 43 map-displays a current position according to the current position calculated sequentially by a current position calculation part 40, together with a peripheral map and a route, on the basis of the optimum route up to the destination for business calculated by a route setting part 42, and a guide part 44 guides an advancing direction or the like along the route by a synthesized voice, screen display or the like. A map display control part 47 determines the destination for the business on the basis of information transmitted from the current position calculation part 40, when a vehicle approaches to the periphery of the destination for the business, makes an external storage control device part 13 read out a background data such as a rail way top view in the periphery of the destination for the business stored in an external storage device 20, and displays the background data superposingly on a usual background data on a map display part 43, as shown in Fig.24(b). <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a navigation technology for guiding a route from a departure place to a destination, and more particularly to a business map database such as a geographic information system (GIS) in a railway, electricity, water, gas, telephone, road, etc. The present invention relates to a navigation apparatus, a method, and a program for guiding a route to business facilities provided over a wide area.

  Navigation devices that have rapidly spread in recent years use road map data prepared in advance in a map database, etc., and display the vehicle position sequentially calculated from navigation data such as GPS, gyroscope, vehicle speed pulse, etc. on the surrounding map, The optimum route to the specified destination is also calculated and guided (navigated) by screen display or synthesized voice.

In such a navigation device, when a vehicle approaches a destination, leaves a set route, or approaches a traffic congestion point, a useful detailed map corresponding to each case is displayed at an accurate timing. Technology to be proposed has been proposed.
JP 11-38872 A

  By the way, since operators such as railways, electricity, water, gas, telephones, and roads have a wide range of facilities, inspection and maintenance of the facilities must be carried out by moving workers to the facilities. There is.

  In such a case, up to the destination facility, a normal navigation device is mounted on a business vehicle and the route guidance based on a general road map is followed. However, for example, information on business facilities such as railway track floor plans in the railway business is not included in the map database of ordinary car navigation devices, so even if the facility is the destination, The map of was not displayed.

  For this reason, in the route guidance of the installed navigation device, the administrator can reach the periphery of the facility, but is not guided to the facility that is the original destination. Therefore, when reaching the periphery of the facility, it may interfere with the arrival at the destination quickly, such as referring to the railroad track plan separately and heading to the management facility accordingly. Especially in the vicinity of large-scale stations, there are many destination facilities, the site area is large, and in the case of places where workers go for the first time, even if only the destination is confirmed, a lot of time is generated. End up. When an urgent situation occurred, it was necessary to arrive at the destination as soon as possible, and it was necessary to shorten the time to the target equipment as much as possible.

  In addition, the road from the facility to the facility is privately owned by the company that manages the facility, and may be located where the entrance to the road from the general road is complicated or at first glance. There may be a case where the vehicle cannot be reached without a significant change in the route, for example, the entrance is in the opposite lane across the track, just because it has reached the periphery.

  On the other hand, operators such as railways, electricity, water, gas, telephones, roads, etc. often have their own map database on management facilities such as Geographic Information System (GIS). The integration of the database and the navigation device and the realization of smoother facility management have been desired.

  The present invention solves the above-mentioned problems, and its purpose is to provide route guidance to the business facilities that are the destinations for managers of railways, electricity, water, gas, telephones, roads, etc. To provide a navigation device, method and program capable of increasing the accuracy and quickly reaching the destination.

  In order to achieve the above object, the invention of claim 1 is directed to route calculation means for calculating an optimum route to a destination based on a destination designated as a departure point, and guidance for guiding guidance based on the optimum route. A business map comprising geographical information relating to business facilities and a normal map not including geographical information relating to said business facilities, wherein said destination is a normal destination and business A destination type selection means for accepting selection of the destination type, the business destination is selected, and the guidance means to the business destination in the guidance means guides the vehicle to the business destination. Means for reading a business map including the business destination when approaching the destination, and displaying the normal map in accordance with the scale of the read business map; Characterized by comprising a means for displaying and superimposing the business map to the regular map.

  The invention according to claim 4 captures the invention according to claim 1 from the viewpoint of the method, and calculates the optimum route to the destination based on the destination designated as the departure place, In the navigation method in which the guidance step for guiding and guiding based on the optimum route is executed by the control unit of the navigation device, a business map composed of geographical information related to business facilities and a normal map not including the geographical information related to the business facilities Using a map, a type selection step for receiving selection of a destination type consisting of a normal destination and a business destination, the business destination is selected, and the business destination in the guidance step is selected. Reading a business map related to the business destination when the vehicle approaches the business destination by the guidance of And displays the regular map to scale in FIG, characterized in that it comprises a step of displaying by superimposing the business map to the regular map.

  The invention of claim 5 captures the inventions of claims 1 and 4 from the viewpoint of a computer program, and calculates the optimum route to the destination based on the destination designated as the departure place; In the navigation program for causing a computer to execute the guidance and guidance processing based on the optimum route, the program does not include a business map composed of geographical information regarding business facilities and geographical information regarding the business facilities. Using a normal map, a selection of a destination type consisting of a normal destination and a business destination is received, the business destination is selected, and the business destination in the guidance step is selected. When the vehicle approaches the business destination by the guidance guidance, the business map related to the business destination is read, and the read Together to display the regular map to scale of Tsutomuyo map, wherein the display by superimposing the business map to the regular map.

  In the inventions of claims 1, 4, and 5 as described above, when a business destination not included in a general navigation map is set, a business map is separately provided and the area around the business facility Because the business map for business facilities is displayed, it is not necessary to bother to refer to the map for business facilities when you reach the vicinity of the equipment, so that you can arrive at the destination quickly. Become.

  In addition, a normal map is displayed in accordance with the scale of the business map related to the business destination, and the business map is displayed on the map so that the normal road and background are also displayed. Therefore, the business map and the normal map can be confirmed together, making it easy to use. Furthermore, when the business destination is composed only of a predetermined scale, it is possible to cope with various business maps in the railway, electric power, gas, road, river business, etc. by performing a process for matching it.

According to a second aspect of the present invention, in the first aspect of the present invention, the business map includes a railroad track plan view.
In the invention of claim 2 as described above, when reaching the periphery of the facility which has been performed by a conventional worker, the railway track plan is referred to separately, and the trouble of heading to the management facility is saved accordingly, and the destination can be quickly reached. It will be possible to arrive at. Especially in the vicinity of large-scale stations, there are many facilities as destinations, the site area is large, and in the case of places where workers go for the first time, even if only the destination is confirmed, a lot of time is generated. However, this problem is also solved by displaying a railway plan view concerning business facilities.

According to a third aspect of the present invention, in the first or second aspect of the present invention, the business map is provided from detachable external storage means.
In the invention of claim 3 as described above, the navigation device is provided in advance from a large amount of the storage device by providing the business map from the external storage means and reading the provided business map. Eliminates the need to hold business maps. Further, for example, if a business map for each business operator is read each time, it can be used for business maps of various business operators, and is highly versatile as an apparatus. In particular, operators of railways, electricity, water, gas, telephones, roads, etc. often have their own map database related to management facilities such as Geographic Information System (GIS). It is very useful to incorporate and use from the outside.

  As described above, according to the present invention, it is possible to directly set a business facility as a destination by separately providing a business map and using a normal map and a business map together in route calculation and guidance guidance. At the same time, it is possible to provide a navigation device, method, and program capable of providing accurate guidance to the facility that is the original destination.

  Next, a navigation device according to the present invention (hereinafter referred to as “the present device”), a corresponding navigation method, and a best mode for carrying out the program will be described with reference to the drawings. It should be noted that the assumptions common to the prior art already described are not restated.

[1. Constitution〕
This device is an in-vehicle navigation device and includes the following elements shown in the functional block diagram of FIG. That is, as a sensor group for obtaining navigation data for navigation, an absolute position / azimuth detection unit 1 including a GPS antenna and a receiver, a relative direction detection unit 2 using a gyro and the like, and a vehicle speed for processing pulses obtained from the vehicle And a detector 3. The disk control unit 12 is a drive such as a hard disk, a DVD-ROM, or a CD-ROM, and plays a role of reading a road map data database using road links, and provides information from a server via a mobile phone (so-called off-state). Board). In particular, the disk control unit 12 in the present embodiment is configured to store and update geographic information related to business facilities added from the external storage device 20 described later.

  The external storage device control unit 13 reads data related to navigation in the processing unit 4 from an external storage device 20 such as a detachable flash memory card or a USB memory known for various standards such as CompactFlash (registered trademark), It performs control such as rewriting. In the present embodiment, for example, all data such as the names and positions of railway facilities to be inspected and maintained or managed, that is, business facilities, are stored in the external storage device 20 and read out each time.

  More specifically, the data stored in the external storage device 20 is composed of data having a relational structure that is assumed to be used for business navigation, and the data structure is converted into equipment type data, main data, sub data, and equipment data. By dividing, equipment data can be flexibly customized according to business. Further, since the data format is the CSV format, the configuration is easy to edit without depending on the model.

  As shown in Fig. 2 (a), (1) Equipment type data indicating stations, tunnels, stops, etc. as railway facilities that are business destinations, (2) Names such as Tohoku Line and Yamanote Line (3) Name of Saikyo Line, etc., sub-data to manage main data, link, classification, arrangement, etc., (4) Latitude, longitude, name, location, description in equipment such as tunnels and stops Etc., each of which is configured in a CSV format.

  The format data stored in the external storage device 20 is read by the navigation device, converted into binary data of a unique format, and stored. Specifically, in FIG. 3, when a tunnel is taken as an example of the equipment data described above, the CSV data in FIG. 3A is converted into the original data format in FIG. 3B and held. .

  Therefore, the data size can be optimized. That is, in the example of FIG. 2 and FIG. 3, it is 114 bytes in the CSV format, and in this format, the file size increases or decreases in proportion to the number of characters. Therefore, it is difficult to estimate the data usage area and the allowable number of data. On the other hand, in the case of binary, it can be fixed to 96 bytes, and within the format, the file size does not increase even if the number of characters increases. Therefore, although the size of the binary file may be larger depending on the number of characters in the CSV, it is easier to estimate the data area and the allowable number of data than in the case of the CSV.

  Since the data format is the CSV format, the destination can be changed by replacing the data content stored in the external storage device 20 in this format. Specifically, the facility data in FIG. 2 (a) is “Saikyo Line, where the stop is between Toda Park and Toda”, and the destination is “First Tokyo Tunnel”. As shown in FIG. 2 (b), the “location of the Tokyo 23 ward management area is a power pole existing between the Setagaya area and the Koto area”, and the destination is “first It is possible to change the destination by rewriting like "electric pole". As a result, as shown in the screen examples of FIGS. 4 and 5, the menu screen can also be redirected with the same configuration.

  In this way, since the data stored in the external storage device 20 has a fixed format, editing the CSV data can easily replace the destination equipment data and change the destination, depending on the business. Equipment data can be flexibly customized. The equipment data stored in the external storage device 20 can be flexibly customized according to business. In addition, when editing equipment data, it does not depend on the model, and equipment data editing is easy.

  That is, only the data of the target facility such as inspection can be stored in the external storage device 20 and read and used by the navigation device. In addition, data edited at the center can be read out by the navigation device, and data rewritten locally can be used at the center. Therefore, it is possible to always synchronize the state of the latest data between the center and the site, and it is not necessary to always store and synchronize all the business equipment data in the navigation device. Only data can be taken out.

  In addition, since the data can be edited in this way, it is possible to select whether the route name is a common line name or a notification line name. Railway line names generally include common line names for general users (eg, Saikyo Line, Yamanote Line, etc.) and notification line names for businesses (Tohoku Line). By making these selectable The destination can be searched according to the preference and familiarity of the operator.

  The external storage device 20 also stores map data related to business facilities that are not used in normal navigation. That is, in the navigation device according to the present embodiment, when a business destination is set, route setting and route guidance are performed based on a map used for normal navigation up to the business destination. Then, the route guidance is performed using the business facility map stored in the external storage device 20 together. Therefore, as the map data for business facilities, the road data consisting of link rows around the business facilities, node / link connection information not included in the normal navigation map data, and the road plan view of the business facilities and the surroundings of the facilities. The background data to be included is stored in the external storage device 20.

  Here, the necessity of the map data regarding such business facilities will be described. The business facilities of this embodiment include railway stops, tunnels, bridges, railroad crossings, kilometer distances, etc., but usually map data related to these facilities is not included in general navigation map data. . In addition, some of the facilities described above can only be accessed from a general road included in the normal navigation map data without a detour.

  Therefore, even if the route is guided to the vicinity of the business facility according to the navigation based on the normal map data, the business facility may not be reached without the route guidance from there to the destination facility. For this reason, in the present embodiment, the external storage device 20 is made to hold map data related to business facilities that are not included in the normal navigation map data.

  The road data in the map data related to business facilities includes, for example, a node on a railroad crossing and a link on a track connecting to business facilities, in addition to road data in facilities connected from general roads. Can be included in addition to road data. For example, in vehicles that can run both on land and track, such as working railroad vehicles and dual mode vehicles (DMV), it is better to enter the track from the nearest railroad crossing with respect to business facilities, In some cases, it is possible to access the vehicle faster than entering from a general road. Therefore, navigation based on road data including the link information of the track is very effective for such a vehicle.

  In this embodiment, the data capacity of the external storage device 20 is assumed to be approximately 1 GB, but this capacity can be arbitrarily set based on the stored data capacity.

  The processing unit 4 is a main CPU that controls the entire system and its peripheral circuits, and includes means for realizing and executing the following functional actions and processes in accordance with programs in the ROM 5. That is, a current position calculation unit 40 that sequentially calculates the current location of the vehicle using a sensor group of 1 to 3, a destination setting unit 41 that receives designation of a destination by a cursor operation or facility search on a map, A route setting unit 42 that searches for and sets an optimum route to the destination by a route search algorithm, a map display unit 43 that displays a map of the current position together with surrounding maps and routes, and a synthesized voice that indicates the direction of travel along the route. And a guide unit 44 for guiding by screen display or the like.

  In the present embodiment, a type determination unit 45, a business destination setting unit 46, a detailed map display control unit 47, and a data update unit 48 are provided as means for setting a business destination. That is, the type determination unit 45 is a means for determining whether to perform a normal destination setting process or a business destination setting process. The business destination setting unit 46 is a means for executing the business destination setting process when the type determining unit 45 determines that the business destination is set.

  When the business destination is set and the guidance is given to the destination, the detailed map display control unit 47 is in the vicinity of the business destination (for example, within the destination 50 m). In addition, the detailed map display control unit 47 determines this based on the information sent from the current position calculation unit 40, and the external storage device control unit 13 determines the vicinity of the business destination stored in the external storage device 20. This is means for reading background data (also referred to as a business map) such as a railroad track plan view and displaying this background data on the map display unit 43 so as to overlap normal background data. When the scale of the business map is constant, the scale of the business map is determined, and the map display unit 43 performs processing for displaying a normal map according to the scale of the business map.

  The data updating unit 48 accepts an update or change instruction from the user via the input unit 11 and the user interface unit 9 for data relating to business facilities for business destination setting stored in the external storage device 20. , Means for converting the data into device-specific binary data and storing the data in the disk control unit 12.

  Of the memory M, the ROM 5 stores a program for the CPU of the processing unit 4, the DRAM (dynamic RAM) 6 stores data processed by the CPU, and the SRAM (static RAM) 7 Information such as settings is backed up by the battery even when the main power is turned off, and a VRAM (video RAM) 8 is used for writing a bit pattern of an image displayed on the display unit 10.

  The display unit 10 is a part for displaying information such as a map and a menu, and is a TFT liquid crystal panel, for example. The input unit 11 is a part that receives input of various commands and information from the user, and is a switch or a touch panel, for example. The user interface unit 9 is a part that connects the display unit 10 or the input unit 11 and the processing unit 4 to perform signal transmission, conversion, timing control, and the like. The FM multiplex broadcast receiving and processing unit 13 is a part that receives FM broadcast waves and extracts desired data such as VICS.

  Further, the processing unit 4 plays the role of each element 41 to 47 as means for realizing and executing the following functional action and processing according to the program in the ROM 5.

[2. Effect)
The navigation device of the present embodiment having the above-described configuration performs normal navigation except when the destination is set to business facilities. Hereinafter, normal navigation processing and The explanation will be divided into business navigation processing.

[2-1. Normal navigation processing)
The destination setting unit 41 accepts designation of a destination by a cursor operation on a map, facility search, or the like. Then, the route setting unit 42 searches for and sets the optimum route to the destination by the route search algorithm. Based on the current position sequentially calculated by the current position calculation unit 40, the map display unit 43 displays a map of the current position together with surrounding maps and routes, and the guide unit 44 displays the traveling direction along the route in a synthesized voice or screen display. invite.

[2-2. (Business navigation processing)
The business navigation process in the navigation device of this embodiment has three main functions. That is, (1) a process of reading data relating to a business destination from the external storage device 20 in the data update unit 48, and (2) whether a normal destination setting process is performed in the type determination unit 45 or a business purpose This is a process for determining whether or not to set a place and setting a business destination in the business destination setting unit 46, and (3) a process for guiding a route to the business destination. Each will be described in detail below.

[2-2-1. Reading data from external storage device)
As described above, the navigation device according to the present embodiment has a function of reading business facility data stored in the external storage device 20 in the CSV format, converting the data into binary data, and holding the data. First, in the center, the destination or the user edits the data of equipment in a predetermined area that is the equipment maintenance territory, and stores it in the external storage device 20. When the external storage device 20 is attached to the navigation device, the external storage device control unit 13 reads it. Next, the data update unit 48 converts the data into unique binary data and stores the data in the disk control unit 12. At this time, the data update unit 48 can also accept an update or change instruction from the user via the input unit 11 and the user interface unit 9.

  Next, the processing of the data updating unit 48 that converts CSV format data into binary data will be described in comparison with the case where conversion processing is not performed. As shown in FIG. 6A, at the time when the navigation device acquires data from the external storage device 20, in the CSV format, after reading one line of data from the CSV file, the syntax of the data is analyzed and an error is detected. This is checked and converted into a binary data structure handled by an application that executes business destination setting or guidance to the business destination (hereinafter referred to as “processing A”). On the other hand, as shown in FIG. 6B, when the data is converted into binary data, when the navigation device acquires data from the external storage device 20, the data update unit 48 stores the binary file stored in the disk control unit 12. It is only necessary to read the structure size from and store it in the memory structure handled by the application (hereinafter referred to as “process B”).

  Further, if processing is performed in the CSV format, as shown in FIG. 6A, when the navigation device uses data, business destination setting or guidance to the business destination is executed. When the application that performs the data request makes a data request, the data update unit 48 reads the data from the external storage device 20 each time, performs processing A, and the application acquires data. In this case, it is not desirable to perform this processing A in an apparatus with limited CPU resources. Further, in order to maintain the processing speed, it is necessary to store the data contents of CSV in the memory M, which is not desirable in an apparatus with limited memory resources.

  On the other hand, when processing is performed after conversion to binary data, as shown in FIG. 6B, at the initial startup, an application for executing business destination setting or guidance to the business destination is requested for data. Is performed, the data update unit 48 reads the CSV data from the external storage device 20, performs the process A, and stores the obtained binary data in the disk control unit 12. When data is used, the data update unit 48 accesses the disk control unit 12 to read binary data and perform processing B. In other words, because the memory structure and size handled by the application can be read, the data size is optimized, the data acquisition speed is high, and binary data is used to prevent easy browsing and tampering of data. It becomes possible to do.

[2-2-2. (Setting of business destination)
(A) Outline of Process The outline of the destination setting process of the present embodiment executed based on the business destination data acquired from the external storage device 20 as described above will be described with reference to the drawings. In the following description, for the sake of convenience, detailed processing of each menu is omitted as appropriate for the sake of convenience, and detailed processing will be described in “(2) Details of processing” described later.

  As shown in the screen example of FIG. 7, when the “destination setting” button is pressed on a normal navigation screen, a “destination setting menu” is displayed. When the “Set from business menu” button is pressed on this screen, as shown in FIG. 8, the “Business destination selection menu” is activated (START), and the business destination setting unit 46 performs processing thereafter. Is started (S801). The business destination setting unit 46 determines whether “select from all facilities” or “select from planned destination” is selected (S802), and when the “select from planned destination” button is selected (NO in S802) ) Activates the scheduled destination selection menu of FIG. 21, accepts designation of the scheduled destination (S803), and sets the destination based on this (S807).

  On the other hand, if the “select from all facilities” button is selected (YES in S802), the all facility selection menu is activated (S804), and route selection is accepted on the route selection menu screen shown in FIG. 10 (S805). Here, it is determined whether the user presses one of the buttons “Select from facility” (S806), “Select from stop” (S809), or “Enter kilometer” (S811), and according to each instruction. The “facility selection menu” shown in FIG. 15 (S807), the “inter-stop selection menu” shown in FIG. 19 (S810), and the “km input menu” shown in FIG. 18 are started (S812). Based on this, a destination is set (S808).

  Whether or not to start the business destination setting process, in the above description, the “Destination Setting Menu” is opened by pressing the “Destination Setting” button on the normal navigation screen. In this embodiment, for example, it is determined whether or not an unarrived destination is set, and an unarrived destination is set. If not, it is possible to start the business destination setting process. Further, the external storage device 20 may be inserted into the navigation device as the start of the setting process.

(B) Details of Processing Next, details of the destination setting processing of this embodiment will be described with reference to a screen example.
When the “destination setting” button is pressed on the normal navigation screen shown in FIG. 7, the “destination setting menu” is displayed. When the “set from business menu” button is pressed on this screen, FIG. The “business destination selection menu” shown is activated, and the processing of the business destination setting unit 46 starts. In this destination selection menu screen, buttons “Select from all facilities”, “Select from planned destination”, and “Delete scheduled destination” are displayed as the destination selection menu. When the “Close” button is pressed, this screen is closed and the normal navigation screen is restored.

  Here, the “scheduled destination” is a business destination set and stored in advance, and in FIG. Registration, addition, deletion, etc. of “scheduled destination” will be described later.

  Hereinafter, regarding the processing when each button is pressed, “data update processing” in the external storage device 20 is added to three of “select from all facilities”, “select from planned destination”, and “delete planned destination”. Including (B-1) to (B-4).

(B-1) Activation of “Select from All Equipment” Menu When the “Select from All Equipment” button is pressed, (b) “Select Equipment”, (c) Destination setting processing is performed by three methods of “stop selection” and (d) “km input”. Hereinafter, this will be described separately in (a) to (d). The “destination determination / registration process” and the “scheduled destination replacement process” will be described as (e) and (f).

(A) Route selection: processing of S805 in FIG. 8 [route selection menu]
When the “select from all facilities” button is pressed on the screen of FIG. 9, the screen changes to a destination setting screen including the “route selection menu” shown in FIG. 10. As shown in the figure, here, the “route name” button extracted from the so-called “common line data” as the route selection menu is displayed within the maximum display number (here, 12).

  In addition, “Previous” and “Next” buttons are displayed. These buttons are displayed when “Route name” is less than the maximum number of displays (12), and the “Route name” is the maximum. When the number is greater than the display number (12), it is displayed in a usable state. When this “next” button is pressed, “route names” from the next of the current display number (1 to 12/21), that is, No. 13, are displayed within the maximum number of displays (12). If the last page has already been displayed, the first page is displayed. On the other hand, when the “Previous” button is pressed, 12 “route names” before the current display number are displayed. If the first page has already been displayed, the last page is displayed. When the “Close” button is pressed, this screen is closed and the normal navigation screen is restored. When the “return” button is pressed, the screen returns to the business destination selection menu screen shown in FIG.

[Point type selection menu on the route]
Further, when any of the route name buttons (for example, “Musashino Line”) is pressed on the “Destination Setting” screen including the route selection menu shown in FIG. 10, the “Spot Type Selection Menu” shown in FIG. Transition to the destination setting screen. Here, the selected “route name” is taken over by pressing the route name button on the screen including the “route selection menu” in FIG.

  In the point type selection menu screen shown in FIG. 11, buttons for “facility selection”, “km input”, and “stop selection” are displayed. When the “Close” button is pressed, this screen is closed to return to the normal navigation screen, and when the “Return” button is pressed, the route selection menu screen in FIG. 10 is returned.

(B) “Equipment selection”: the process of S807 in FIG. 8 [Overview of setting the destination between two points]
When the “facility selection” button is pressed on the point type selection menu screen shown in FIG. 11, so-called “two-point destination setting” processing is executed as business destination setting processing. Therefore, first, an outline of setting the destination between the two points will be described.

  As shown in the flow of the process for setting the destination between two points shown in FIG. 11, this process is performed in the route selection menu shown in FIG. 10 as described above (S1101). When the "" button is pressed, the "inter-stop selection menu" shown in FIG. 13 is displayed.

  Here, selection of two stop points, for example, station sections of “Higashikawaguchi” and “Yoshikawa” is accepted (S1102). Then, the “facility selection” menu screen relating to the equipment in the two-station section shown in FIG. 15 is displayed, and the selection of the equipment in the two-station section (between two points) is accepted (S1103). Then, for example, when “first Negishi tunnel” is selected by the user, the destination setting screen shown in FIG. 23 is requested to confirm the destination with the flag displayed at the selected destination (S1104). Based on this, the user manually adjusts the position of the flag on the screen, and presses the “Route Search” button to set the destination (S1105).

[Details of Point-to-Point Destination Setting: Process in S806 in FIG. 8]
Hereinafter, the above-mentioned two-point destination setting will be specifically described while showing specific screen transitions. The following screen transition is processing corresponding to S1102 and S1103 in FIG.

(Selection menu between stops: processing of S1102 in FIG. 11)
When the “facility selection” button is pressed on the point type selection menu screen shown in FIG. 11, the screen changes to a destination setting screen provided with a “stop-to-stop selection menu” shown in FIG. 13. In this screen, the selected “route name” (here, “Musashino line”) is taken over by pressing the “facility selection” button in FIG.

  On this screen, the “stop name” button corresponding to the “route name” taken over is displayed within the maximum number of displays (10). In addition, a “business start point” is additionally displayed at the top of the stops and a “business end point” is additionally displayed at the back.

  The “Previous” and “Next” buttons are displayed when the “stop name” is within the maximum number of displays (10), and the “stop name” is larger than the maximum number of displays (10). In some cases, it is displayed in an available state. When this “Next” button is pressed, the five “stop names” on the right are displayed on the left five, and the “stop names” from the next of the current display number are displayed on the right. Display within the number of cases (10). If the last page has already been displayed, the first page is displayed. On the other hand, when the “Previous” button is pressed, the five “stop names” currently on the left are displayed on the right five, and the five “stop names” before the current display number are displayed on the left. If the first page has already been displayed, the last page is displayed. When the “Close” button is pressed, this screen is closed to return to the normal navigation screen, and when the “Back” button is pressed, a destination consisting of the “point type selection menu” shown in FIG. 11 is displayed. Return to the setting screen.

  When the “stop name” button is pressed in a state where the “stop name” is not selected, the pressed “stop name” button is displayed in a selected state. When the “stop name” button in the selected state is pressed, the state returns to the unselected state. When another “stop name” button is pressed in a state where “stop name” is selected, the area between the two pressed stops is selected, and the “equipment type selection menu” shown in FIG. 14 is provided. Transit to the ground setting screen.

(Equipment type selection menu screen: processing of S1103 in FIG. 11)
In the “facility type selection menu” screen shown in FIG. 14, when the “stop name” button in the “inter-stop selection menu” screen shown in FIG. 11 is pressed, the “route name” selected between the “route name” and the stop is displayed. This screen is displayed by taking over "stop name". Display "equipment type name" button from "equipment type data" within the maximum number of displays (9). At this time, the “OK” button is displayed in a state where it is not used. If the “Close” button is pressed, this screen is closed to return to the normal navigation screen, and if the “Return” button is pressed, the screen returns to the “Inter-stop selection menu” screen.

  When the “equipment type name” button in an unselected state is pressed, the pressed button is in a selected state, and accordingly, the “decision” button is also available. When the “equipment type name” button in the selected state is further pressed, the corresponding “equipment type name” button returns to the unselected state.

  When the “decision” button is pressed while any “equipment type name” is selected, this “equipment type” is taken over and the destination setting having the “equipment selection menu” shown in FIG. 15 is set. Transition to the screen.

(Equipment selection menu: processing of S1103 in FIG. 11)
In the “facility selection menu” screen shown in FIG. 15, when the “decision” button on the “facility type selection menu” screen in FIG. 14 is pressed, the “route name” selected, the “stop name” between the stops, and the “installation type name” are displayed. ”To display a list of equipment names between stops. Specifically, the “facility name” between “Higashikawaguchi” and “Yoshikawa” on the “Musashino Line” is displayed, and the “facility name” button is displayed within the maximum number of displays (10).

  In addition, the “Previous” and “Next” buttons are displayed when the “facility name” is within the maximum number of displays (10), and the “facility name” is the maximum number of displays (10). If there are more, they are displayed as available.

  When this “next” button is pressed, the “facility name” following the current display number is displayed on the next page within the maximum number of displays (10). If the last page has already been displayed, the first page is displayed. On the other hand, when the “Previous” button is pressed, the ten “facility names” preceding the current display number are displayed on the previous page. If the first page has already been displayed, the last page is displayed. When the “Equipment Name” button is pressed on this screen, the “Equipment Name” is taken over and the screen changes to a destination setting screen having a “Destination Setting Menu” shown in FIG.

  Further, when the “close” button is pressed, this screen is closed to return to the normal navigation screen, and when the “return” button is pressed, the screen returns to the “facility type selection menu” screen shown in FIG.

  In the destination setting menu screen shown in FIG. 17, the “facility” selected as described above can be registered as the scheduled destination, and the process will be described later.

[Other: Equipment information list screen]
Here, when the “information list” button is pressed, a transition is made to the “facility information list” screen shown in FIG. In this case, this screen is displayed with the selected “route name” and the “stop name” between the stops. That is, the “Musashino Line” that is the “route name” that has been taken over and “Higashikawaguchi to Yoshikawa” that is the “stop name” between the stops are displayed. In the list, “facility name”, “km” and “explanation” are displayed within the maximum number of displays (7).

  The “Previous” and “Next” buttons are displayed when the “Equipment name” is within the maximum number of displays (7) and cannot be used, and the “Equipment name” is larger than the maximum number of displays (7). Is displayed in an available state. When this “next” button is pressed, the “facility name” next to the current display number is displayed on the next page within the maximum display number (seven). If the last page has already been displayed, the first page is displayed. On the other hand, when the “Previous” button is pressed, seven “facility names” before the current display number are displayed on the previous page. If the first page has already been displayed, the last page is displayed. Further, to return to the “facility selection menu” screen shown in FIG. 15, a “return” button is pressed. When the “Close” button is pressed, the screen is closed and the normal navigation screen is restored.

(C) Stop selection menu: processing of S810 in FIG. 8 When the “stop selection” button is pressed on the point type selection menu screen shown in FIG. 11, setting of the destination having the “stop selection menu” shown in FIG. Transition to the screen. In this screen, the “route name” (in this case, “Musashino Line”) selected in FIG. 11 is taken over and this screen is displayed.

  Display the “stop name” button corresponding to the “route name” inherited within the maximum number of displays (10). The “Previous” and “Next” buttons are displayed when the “stop name” is within the maximum number of displays (10), and the “stop name” is larger than the maximum number of displays (10). In some cases, it is displayed in an available state.

  When this “Next” button is pressed, the five “stop names” currently on the right are displayed on the left five, and the “stop names” next to the current display number are displayed on the right. Display within the maximum number of displays (10). If the last page has already been displayed, the first page is displayed. On the other hand, when the “Previous” button is pressed, the five “stop names” currently on the left are displayed on the right five, and the five “stop names” before the current display number are displayed on the previous page on the left. If the first page has already been displayed, the last page is displayed. When the “Close” button is pressed, this screen is closed to return to the normal navigation screen, and when the “Back” button is pressed, the destination setting screen including the “point type selection menu” shown in FIG. Return to.

  In this stop selection menu screen, when any "stop name" button is pressed and the corresponding "stop name" is selected, the selected "route name", "inter-stop name" and "facility name" are taken over. Then, the screen changes to a destination setting screen having a “destination setting menu” shown in FIG.

(D) Kilometer Input Menu: Process of S812 in FIG. 8 On the other hand, when the “Enter Kilometer” button is pressed on the point type selection menu screen shown in FIG. 11, the “Kilometer Input Menu” shown in FIG. Transit to the destination setting screen you have. In this screen, the “route name” (in this case, “Musashino Line”) selected in FIG. 11 is taken over and this screen is displayed. In addition, the range of “about kilometer” that can be input is displayed corresponding to the “route name” that has been taken over. When the “Close” button is pressed, this screen is closed to return to the normal navigation screen, and when the “Back” button is pressed, a destination consisting of the “point type selection menu” shown in FIG. 11 is displayed. Return to the setting screen.

  In the kilometer input field, "Kilo kilometer" is input by pressing a numeric input button of "0" to "9" and a decimal point input button of ".". The “clear” button is for clearing the inputted “about kilometer”.

  Here, in the railway, all positions on the track are managed by the distance from the starting point of the track, and this is called “about a kilometer”. This kilometer is beaten every 20 m on the track, and the latitude and longitude are recorded as data. In general, railway operators use this kilometer as a transmission means used for specifying a position when a failure or accident occurs on a track, and can be called an address on the track. It is the same index as “Kilopost” on the highway.

  When "Kilometers" is entered and the "Enter" button is pressed, the "Destination setting menu" shown in Fig. 17 is provided, taking over the previous "Route name" and the entered "Kilometers". Transit to the destination setting screen.

(E) Destination determination / registration: processing of S808 in FIG. 8 In the above-described equipment selection menu screen, kilometer input menu screen, and stop selection menu screen, “facility name”, “km distance”, or “stop name” respectively. "" Is selected, the screen changes to a destination setting screen having a "destination setting menu" shown in FIG.

  In this destination setting menu screen, “Destination”, “Scheduled destination registration”, and “Cancel” buttons are displayed. In addition, the “route name” and the “name” of the destination inherited from each screen are displayed (here, route: Musashino Line, name: No. 2 Otawara Highway). In addition, if there is a “stop station name” that has been taken over, it is displayed (here “Higashikawaguchi-Yoshikawa”).

  When the “Destination Determination” button in FIG. 17 is pressed, the succeeded “Name” and “Position Information” are registered as destination settings in normal navigation, and the destination setting process ends.

  In addition, when the “Register destination” button is clicked, the “Route name”, “Equipment type”, “Name” and “Location information” that were taken over are registered in the planned destination, and each transition source to this screen Return to the screen. Further, when the “scheduled destination registration” button is pressed and 20 cases are already registered in the “scheduled destination”, the screen shifts to the “scheduled destination replacement screen” shown in FIG. . When the “Close” button is pressed, this screen is closed and the screen returns to the normal navigation screen. When the “Return” or “Cancel” button is pressed, the transition source screen (equipment) Return to the selection menu screen, kilometer input menu screen or stop selection menu screen).

(F) Scheduled destination replacement When the “scheduled destination registration” button in the “destination setting menu” shown in FIG. 17 is pressed, if 20 “scheduled destinations” have already been registered, 20 is displayed. This screen displays a list of registered “scheduled destinations” within the maximum number of displays (5). In addition, a “replacement” button is displayed corresponding to each “scheduled destination”.

  The “Previous” and “Next” buttons on this screen are displayed when “Scheduled destination” is less than the maximum number of displays (5), and the “Scheduled destination” is the maximum number of displays (5 If there are more, the information is displayed in a usable state. When this “next” button is pressed, the “scheduled destination” next to the current display number is displayed on the next page within the maximum number of displays (5). If the last page has already been displayed, the first page is displayed. On the other hand, when the “Previous” button is pressed, five “scheduled destinations” before the current display number are displayed on the previous page. If the first page has already been displayed, the last page is displayed. Further, when the “close” button is pressed, this screen is closed to return to the normal navigation screen, and when the “return” button is pressed, the screen returns to the “destination setting menu” shown in FIG.

  When the “replace” button is pressed, a “replacement confirmation dialog” is displayed. Here, when the “OK” button is pressed, the “scheduled destination” and the newly designated “scheduled destination” are switched, and the screen returns to the “destination setting menu” screen shown in FIG. When the “Cancel” button is pressed, the “replacement confirmation dialog” is closed without replacing. As described above, the planned destination replacement process is completed.

(B-2) Activation of “Select from Scheduled Destination” Menu When the “Select from Scheduled Destination” button is pressed on the destination selection menu screen in FIG. 9, the “Select Scheduled Destination” menu shown in FIG. Transit to the destination setting screen you have. This screen displays a list of pre-registered “scheduled destinations” within the maximum number of displays (5). In addition, a “destination determination” button is displayed corresponding to each “scheduled destination”. When this “Destination Determination” button is pressed, the “name” and “position information” of the corresponding “scheduled destination” are registered as destination settings in a normal navigation device.

  On this screen, the “Previous” and “Next” buttons are displayed when the “Scheduled destination” is less than the maximum number of displays (5), and the “Scheduled destination” is the maximum number of displays ( If there are more than 5), it is displayed in a usable state. When the “Next” button is pressed, the “scheduled destination” next to the current display number is displayed on the next page within the maximum number of displays (5). If the last page has already been displayed, the first page is displayed. On the other hand, when “Previous” is pressed, five “scheduled destinations” before the current display number are displayed on the previous page. If the first page has already been displayed, the last page is displayed.

  When the “Close” button is pressed, this screen is closed and the screen returns to the normal navigation screen. When the “Return” button is pressed, the screen returns to the destination selection menu screen shown in FIG.

(B-3) Activation of “Delete Scheduled Destination” Menu When the “Delete Scheduled Destination” button is pressed on the “Destination Selection Menu” screen of FIG. 9, “Delete Scheduled Destination” shown in FIG. Transition. On this screen, the registered “scheduled destinations” are displayed in a list within the maximum display number (5).

  The “Previous” and “Next” buttons in FIG. 22 are displayed in an unusable state when the “scheduled destination” is within the maximum display number (5 cases). When there are more “scheduled destinations” than the maximum number of displays (5), it is displayed in a usable state. When this “next” button is pressed, the “scheduled destination” next to the current display number is displayed on the next page within the maximum number of displays (5). If the last page has already been displayed, the first page is displayed. On the other hand, when the “Previous” button is pressed, five “scheduled destinations” before the current display number are displayed on the previous page. If the first page has already been displayed, the last page is displayed.

  In addition, corresponding to each “scheduled destination”, a “schedule delete” button is displayed, and a “delete all” button is also displayed. When this “schedule deletion” button is pressed, a “deletion confirmation dialog” is displayed, and when the “OK” button is pressed, the corresponding “scheduled destination” is deleted and this screen is displayed again. When the “Cancel” button is pressed, the “Delete Confirmation Dialog” is closed without deleting. On the other hand, when the “Delete All” button is pressed, a “Delete Confirmation Dialog” is displayed, and when the “OK” button is pressed, all “scheduled destinations” are deleted and the destination selection menu shown in FIG. Return to the screen. When the “Cancel” button is pressed, the “Delete Confirmation Dialog” is closed without deleting. When the “Close” button is pressed, this screen is closed and the screen returns to the normal navigation screen. When the “Return” button is pressed, the screen returns to the destination selection menu screen shown in FIG.

(B-4) Data Update Processing On the destination selection menu screen in FIG. 9, it is confirmed whether or not the external storage device 20 made up of CompactFlash (registered trademark) or the like is installed. 9 (a) is displayed, and when it is installed, as shown in FIG. 9 (b), “Reading and updating equipment data” and “Reading and updating planned destination” buttons are displayed. An update of facility data or an update of planned destination data is accepted.

  When the “Read and update equipment data” button is pressed on such a screen, the screen transits to the “Update equipment data” screen having the “Update target data list” menu shown in FIG. In this equipment data update screen, each “data file” of the management target equipment is displayed in a list. Each “data file” confirms the existence of each CSV data file (file name fixed) in the external storage device 20 (top directory) such as a CF card, and if it exists, the file “update date time” Is displayed. If it does not exist, “update date time” is not displayed.

  Here, when the “update” button is pressed, an “update confirmation dialog” is displayed and the equipment data update is confirmed. When the “OK” button is pressed, the target file is read and a transition is made to the destination selection menu screen shown in FIG. 9 which is the initial screen. At this time, the data information is written in the directory of the navigation device body. On the other hand, when the “Cancel” button is pressed, the target file is not read, the “update confirmation dialog” is closed, and the destination selection menu screen shown in FIG. 9 is displayed. When the “Close” button is pressed, this screen is closed and the screen returns to the normal navigation screen.

  On the other hand, on the destination selection menu screen shown in FIG. 9B, when the “read and update scheduled destination” button is pressed, an update confirmation dialog is displayed. If “OK”, the destination of the planned destination is displayed. The CSV data file is read, the scheduled destination information is updated, and this screen is displayed again.

[2-2-3. (Guidance to business destination)
The route guidance for the business destination set as described above will be described. When the business destination is set by the business destination setting unit 46, the route setting unit 42 searches for and sets the optimum route to the business destination by the route search algorithm. At this time, the disk control unit 12 reads the map data from the departure point to the vicinity of the business destination, and the external storage device control unit 13 reads the business destination and the map data around the business destination from the external storage device 20, Store in memory M. The route setting unit 42 uses the two map data together to calculate an optimum route to the business destination.

  Based on the optimum route to the business destination calculated by the route setting unit 42, the map display unit 43 displays the current position together with the surrounding map and route according to the current position sequentially calculated by the current position calculation unit 40, The guide unit 44 guides the traveling direction along the route by synthetic voice or screen display.

  When the vehicle approaches the business destination, the detailed map display control unit 47 determines this based on the information sent from the current position calculation unit 40, and the external storage device control unit 13 Background data such as a track plan view around the business destination stored in the external storage device 20 is read, and this background data is sent to the map display unit 43 as normal background data as shown in FIG. Overlay and display.

  Here, business-use map data such as a railway track plan view is not necessarily composed of map data of a plurality of different scales, like normal map data in a navigation device. Therefore, as shown in FIG. 24B, when the business map is displayed superimposed on a normal map, the detailed map display control unit 47 determines the scale of the business map and displays the map of the business map. A normal map is displayed in accordance with the scale, and a business map is displayed on the map. Therefore, the route guidance is performed using the large scale map as shown in FIG. 24A until the vicinity of the business destination, and when the vicinity of the business destination is reached, the route shown in FIG. A small-scale map that matches the scale of such a business-use map is displayed.

  In addition, the guide unit 44 guides the direction of travel along the route by synthetic voice or screen display, and also guides that the vicinity of the business destination is approached. Note that background data such as the above-mentioned railroad track plan is not displayed in the case of normal navigation processing, but is displayed only when a business destination is set.

[2-3. effect〕
The effect of the present embodiment acting as described above is as follows.
[Selection of business destination, combined use of business map, effect of overlay display]
By separately having all data related to railway destinations that are not included in general navigation maps, that is, the names and locations of commercial equipment, the commercial facilities are directly set as destinations. it can. When a business destination is set by the business destination setting unit 46, the disk control unit 12 reads map data from the departure point to the vicinity of the business destination, and the external storage device control unit 13 Reads out the business destination and its surrounding map data from the external storage device 20, and the route setting unit 42 searches for the optimum route to the business destination by the route search algorithm. Accurate guidance will be provided even to the equipment that is the original destination.

  Further, when the vehicle approaches the vicinity of the business destination, the detailed map display control unit 47 determines this based on the information sent from the current position calculation unit 40, and the external storage device control unit 13 The background data such as the track plan around the business destination stored in the external storage device 20 is read, and this background data is superimposed on the normal background data on the map display unit 43 as shown in FIG. By displaying it, it is not necessary to bother to refer to the map regarding the business facility when it reaches the periphery of the equipment, and it is possible to quickly reach the destination.

  Therefore, when reaching the periphery of the facility, which has conventionally been performed by a worker, it is possible to quickly arrive at the destination by referring to the railroad plan view and saving time and heading to the management facility accordingly. Especially in the vicinity of large-scale stations, there are many facilities as destinations, the site area is large, and in the case of places where workers go for the first time, even if only the destination is confirmed, a lot of time is generated. However, this problem is also solved by displaying a railway plan view concerning business facilities.

  In addition, a normal map is displayed in accordance with the scale of the business map related to the business destination, and the business map is displayed on the map so that the normal road and background are also displayed. Therefore, the business map and the normal map can be confirmed together, making it easy to use. Furthermore, when the business destination is composed only of a predetermined scale, it is possible to cope with various business maps by performing a process for matching it.

  Furthermore, the navigation apparatus holds a large number of business maps in advance by providing the data related to the business destination from the external storage device 20 so that the navigation apparatus reads the provided data. There is no need. In addition, since the data stored in the external storage device 20 can be edited at the center, the business map can be freely updated / changed / modified, which is very convenient.

[Effect of point-to-point selection]
First, select the route you want to make a destination, then select a stop between the destination districts on that route, and then select the equipment type, and the business facilities that exist between the two stops will be listed. Because the listed facilities can be set as destinations, if you want to set only the facilities on the railway track that are subject to maintenance as business destinations, useless destination candidates will not be listed, A desired destination can be searched quickly and reliably. As described above, since only necessary facilities are accurately listed, for example, even when an accident or a facility failure occurs on a track, a destination can be searched quickly. Also, if the unique data of the area to be maintained and managed is stored in advance in the external storage means 20, data that cannot be used in general navigation can be used, and a more accurate destination search suitable for the purpose can be performed. .

  In addition, as shown in FIG. 15, the facilities between the two stops are displayed in order from the stop displayed on the left and right, which facility is the destination from the relationship with the position of the vehicle, etc. Make planning easier. In addition, you can select any one of the multiple facilities displayed between the stops as the destination, and register the other destination as the next destination, so if you want more than one between two points Even when the destination to be listed is listed, the next destination can be easily set by setting the next destination as the registered destination. In particular, when a plurality of facilities are turned around in a day due to maintenance and inspection, it is possible to efficiently turn on business facilities.

  Furthermore, as mentioned above, if you know the name of the route including the common line, the name of the stop, and the name of the equipment for business use, you can set the destination quickly and accurately without referring to the railway track plan view. Eliminates the hassle of typing business equipment names with letters.

[Effect of destination setting by inputting kilometer]
By separately having all data related to business destinations such as names and locations of railway facilities that are not included in general navigation maps, that is, business facilities, etc. Can be set. In particular, as shown in FIG. 18, by inputting “about kilometer” as the destination setting means, it is possible to directly specify the business facility as the destination, and more precise destination setting is possible. It becomes possible.

[3. Other embodiments]
In addition, this invention is not limited to the said embodiment, Other embodiments which are illustrated next are included. In the above embodiment, the case where the present invention is used for the railway business has been described. However, the present invention covers not only the railway business but also a wide range of original facilities such as management business for electricity, water, gas, telephone, road, etc. The service provider can be applied to any company that has a crossover and conducts maintenance and inspection. For example, in a business operator managing an expressway or a toll road, “route” in the above embodiment can be replaced with a road name, and “stop” can be replaced with an interchange or dry-in. In addition, “km” can be replaced with “kilo post” attached to indicate the position of an expressway or the like.

  In addition, electric power companies and gas companies have built their own databases as geographic information systems (GIS) for utility poles, transmission lines and underground piping facilities. The present invention can be applied by replacing the “name”, “kilometer”, and “facility name” with their own names. For such infrastructure providers, it is very useful to be able to guide and guide quickly and reliably to facilities where accidents or breakdowns have occurred, especially during disasters.

The functional block diagram which shows the structure of embodiment of this invention. 3 is a data configuration example in the external storage device according to the embodiment of the present invention. The data structural example at the time of converting the data in the external storage device in embodiment of this invention in a navigation apparatus. The example of a screen based on the data structure before a change in the external storage device of embodiment of this invention. The example of a screen based on the data structure after a change in the external storage device of embodiment of this invention. The block diagram which compared the case where the data in the external storage device in embodiment of this invention is converted in the navigation apparatus, and the case where it is not converted. The example of the destination setting menu screen in the normal navigation screen of embodiment of this invention. The flowchart which shows the outline | summary of the destination setting process in embodiment of this invention. The example of the destination selection menu screen in embodiment of this invention. The example of a route selection menu screen in embodiment of this invention. The flowchart which shows the destination setting process between two points in embodiment of this invention. The example of a point classification selection menu screen in embodiment of this invention. The example of a menu selection menu between stops in embodiment of this invention. The example of an equipment classification selection menu screen in the embodiment of the present invention. The example of an equipment selection menu screen in the embodiment of the present invention. The example of an equipment information list menu screen in the embodiment of the present invention. The example of a destination setting menu screen in embodiment of this invention. The example of a stop selection menu screen in the embodiment of the present invention. The example of a kilometer input menu screen in embodiment of this invention. The example of a scheduled destination list menu screen in the embodiment of the present invention. The example of a scheduled destination selection menu screen in embodiment of this invention. The example of a scheduled destination deletion menu screen in the embodiment of the present invention. The example of the update data list menu screen in embodiment of this invention. The display screen example of the railroad track top view in embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Absolute position and direction detection part 2 ... Relative direction detection part 3 ... Vehicle speed detection part 4 ... Processing part (Main CPU and its peripheral circuit)
5 ... ROM
6. Dynamic RAM (DRAM)
7. Static RAM (SRAM)
8 ... Video RAM (VRAM)
DESCRIPTION OF SYMBOLS 9 ... User interface part 10 ... Display part 11 ... Input part 12 ... Disk control part 13 ... External storage device control part 20 ... External storage device 40 ... Current position calculation part 41 ... Destination setting part 42 ... Route setting part 43 ... Map Display unit 44 ... Guide unit 45 ... Type selection receiving unit 46 ... Business destination setting unit 47 ... Detailed map display control unit 48 ... Data update unit

Claims (5)

In a navigation apparatus comprising route calculation means for calculating an optimum route to a destination based on a destination and a designated destination, and guidance means for guiding and guiding based on the optimum route,
A business map composed of geographical information about business facilities, and a normal map not including geographical information about the business facilities,
The destination includes normal destinations and business destinations, and type selection means for receiving selection of types of these destinations;
Means for reading a business map including the business destination when the business destination is selected and a vehicle approaches the business destination by guidance guidance to the business destination in the guidance means; ,
A navigation apparatus comprising: means for displaying the normal map in accordance with the scale of the read business map, and displaying the business map superimposed on the normal map.   The navigation apparatus according to claim 1, wherein the business map includes a railroad track plan view.   The navigation apparatus according to claim 1, wherein the business map is provided from a removable external storage unit. In a navigation method in which a route calculation step for calculating an optimum route to a destination based on a destination and a designated destination and a guidance step for guiding and guiding based on the optimum route are executed by a control unit of the navigation device ,
Using a business map composed of geographical information about business facilities and a normal map not including geographical information about the business facilities,
A type selection step for accepting selection of a destination type consisting of a normal destination and a business destination;
A step of reading a business map related to the business destination when the business destination is selected and a vehicle approaches the business destination by guidance to the business destination in the guidance step;
And displaying the normal map in accordance with the scale of the read business map, and displaying the business map superimposed on the normal map. In a navigation program for causing a computer to execute a process of calculating an optimum route to a destination based on a destination designated as a departure point and a process of guiding and guiding based on the optimum route,
The program is stored in the computer.
Using a business map composed of geographical information about business facilities and a normal map not including geographical information about the business facilities,
Let us accept a choice of destination type consisting of normal destination and business destination,
When the business destination is selected and the vehicle approaches the business destination by guidance to the business destination in the guidance step, the business map related to the business destination is read out,
A navigation program, wherein the normal map is displayed in accordance with the scale of the read business map, and the business map is displayed superimposed on the normal map.