JP4705206B1 - Electronic book apparatus and electronic book program - Google Patents

Abstract

A map page of an electronic book can be used more effectively.
An electronic book device for displaying an electronic book includes electronic book information including image data in which a page map attached map, which is a map posted on a map page, is integrated, a map range and a scale of the page map. And various types of memory for storing map page information in which map page information is associated with, and attached figure range information indicating a map range that is hidden by the attached figure in the map range of the page map Sections 21, 23, and 25, specifying the current position of the user A, searching for map page information indicating a map range including the current position, selecting map page information with a large scale of the corresponding page map, and selecting the current position Whether or not to display a page map is determined according to the determination that the position corresponding to is hidden by the attached drawing, and the page map is displayed on the display screen based on the electronic book information.
[Selection] Figure 6

Description

  The present invention relates to an electronic book device that provides book data in which a travel guidebook or the like is digitized, and an electronic book program for causing the electronic book device to control operations.

  In recent years, electronic books that have been published and converted into electronic forms that can be viewed on a display screen of an electronic device have been distributed. Therefore, electronic devices having various functions have been proposed as electronic devices having a function for browsing electronic books (hereinafter referred to as “electronic book devices”).

  On the other hand, various map display devices that display an electronic map have been known. As such a map display device, for example, in Patent Document 1, a correspondence relationship between a basic diagram on a map and a detailed diagram is associated as data, a related map section is provided, and a mutual relationship between the basic diagram and the detailed diagram is provided. Is disclosed in which a detailed diagram corresponding to a basic diagram can be displayed by providing the correspondence relationship as a table (Patent Document 1).

JP 09-288446 A

  Such a technique of the map display device can also be used for an electronic book device.

  However, when a map is displayed on a display screen included in an electronic book device using book data (electronic book) obtained by digitizing a travel guidebook or the like, there is a problem that a map desired by the user may not be provided quickly. was there.

  That is, for example, when a user of a conventional electronic book device searches for an electronic book having a map including its current position from a plurality of electronic books and displays the electronic book on the electronic book device, the name of the electronic book In some cases, it is necessary to select an electronic book suitable for the user's own use.

  Further, for example, when the electronic book device searches and displays a map posted in the electronic book from a region name input by the user, the range that the user wanted to check on the map is another image (for example, a map). Detailed maps showing detailed information on other areas above, cut maps that are different scales on the base map, etc. (hereinafter also referred to as “attached diagrams”)) There was a problem that the map had to be searched again.

  In addition, when the electronic book device does not have a detailed map (for example, a map whose scale is larger than a predetermined value) including a point (designated point) whose position is designated by the user, an intelligible wide area map is displayed, There was a problem that the map could not be displayed because the wide area map itself did not exist.

  Hereinafter, a page including a map (that is, a page on which a map is posted) is referred to as a “map page”. Also, the map posted on the map page is called “page map”. However, hereinafter, “page map” may be simply referred to as “map”.

  In order to solve the above-described problems, an object of the present invention is to enable more effective use of a map page included in an electronic book.

  An electronic book device of the present invention is an electronic book device that displays an electronic book on a display screen of a display device, and is image data relating to a map page on which a map included in the electronic book is posted, and Electronic book information storage means for storing electronic book information including image data in which a page map which is a published map and an attached figure which is a figure attached to the page map are combined, and latitude of the page map Map page information storage means for storing map page information in which a map range indicating a range of longitude, a scale of the page map, and information related to the map page are associated with each other, and the attached diagram exists on the map page In the case, the attached figure range information indicating the attached figure range which is a map range hidden in the display by the attached figure out of the map range of the page map is stored. Attached figure range information storage means, current position specifying means for specifying the current position of the user, map page information searching means for searching for map page information indicating a map range including the current position specified by the current position specifying means, When there is a plurality of map page information searched by the map page information search means, based on the map page information selection means for selecting map page information with a large scale of the corresponding page map, and the attached figure range information A current position situation determining means for determining whether or not a position corresponding to the current position is hidden by the attached figure on a map page corresponding to the map page information selected by the map page information selecting means; In response to determining that the position corresponding to the current position is hidden by the attached drawing by the current position situation determination means, A page map display determining means for determining whether or not to display the page map based on a positional relationship between a position corresponding to a current position and the attached figure range; and And a page map display means for displaying at least a part of the page map on the display screen based on the electronic book information in response to the determination of display.

  With the above configuration, the map page of the electronic book can be used more effectively.

  A divided map range information storage means for storing divided map range information indicating a divided map range obtained by dividing the map range according to a predetermined rule, and the attached figure range information is determined by the attached figure for each divided map range; A map range indicating a hidden state is shown, and the map page information selecting means is one of the divided map range information corresponding to the selected map page information indicating the divided map range including the current position. A divided map range information extracting means for extracting divided map range information indicating a divided map range obtained by dividing the large-scale page map, wherein the page map display means uses the page map display determining means to In response to the determination that the map is to be displayed, the divided map range information extracted by the divided map range information extraction means of the page map indicates The part corresponding to the split map range may be configured to be displayed on the display screen.

  The page map display means corresponds to the current position when the current position situation determination means determines that the position corresponding to the current position is hidden by the attached drawing. You may be set as the structure displayed by the display mode different from when the position is not hidden by the said attached drawing.

  In response to determining that the position corresponding to the current position is hidden by the attached drawing by the current position state determination means, a dislocation position that satisfies a predetermined condition with respect to the position corresponding to the current position is determined. A current position icon indicating the current position of the user is displayed at a position corresponding to the shift position with respect to the page map displayed on the display screen by the shift position specifying means to be specified and the page map display means. Position icon display means may be included.

  A first distance calculating means for calculating a distance from a position corresponding to the current position to a boundary line between the attached figure range and a map range that is not hidden by the attached figure, The map display determination means determines that the page map is not displayed when a value indicating the distance calculated by the first distance calculation means exceeds a predetermined threshold, and the map page information selection means The page map display determination means cancels the selection of the map page information in response to determining that the page map is not displayed, and the map page information whose selection is canceled by the selection cancellation means A selection target exclusion unit that excludes the map page information selection unit from the selection target, and the selection target exclusion unit excludes the map page information from the selection target. Depending on the preparative may be a newly constructed to select a map page information.

  When the page map display determination means determines that the page map is to be displayed, the division on the page map is performed based on the positional relationship between the position corresponding to the current position and the attached figure range. A map area selection unit that selects a map area that is close to the map area indicated by the map area information extracted by the map area information extraction unit, as a map area range; You may be set as the structure which extracts the division | segmentation map range information which shows the proximity map range selected by the proximity map range selection means.

  A dividing unit that divides the divided map range indicated by the divided map range information extracted by the divided map range information extracting unit into the attached figure range and other ranges; and corresponding to the current position on the page map Second distance calculating means for calculating a distance from a position to a boundary line between the divided map range including the current position and each of the other divided map ranges in the divided map range divided by the dividing means; A second distance determining means for determining whether a value indicating the distance calculated by the two distance calculating means is equal to or less than a specific threshold, and the divided map range information extracting means includes a plurality of divided areas divided by the dividing means. In addition to the divided map range information indicating the divided map range including the current position, the value indicating the distance calculated by the corresponding second distance calculating means Dividing map range information indicating a division map range is determined Jono is below the threshold may be configured to extract.

The electronic book program of the present invention is an electronic book program for controlling an operation so as to display an electronic book on a display screen of a display device.
A current position specifying process for specifying the current position of the user and image data related to a map page on which a map included in the electronic book is posted, and a page map that is a map posted on the map page and attached to the page map The map range indicating the latitude and longitude range of the page map indicated by the electronic book information stored in the electronic book information storage means for storing the electronic book information including the image data in which the attached figure is a unified figure And the map page information stored in the map page information storage means for storing the map page information in which the scale of the page map and the information on the map page are associated with each other. Map page information search processing for searching map page information indicating a map range including the current position, and map page information searched in the map page information search processing Map page information selection processing for selecting map page information with a large scale of the corresponding page map, and when the attached map exists on the map page, the map range of the page map, Based on the attached figure range information stored in the attached figure range information storage means for storing attached figure range information indicating the attached figure range which is a map range whose display is hidden by the attached figure, A current position situation determination process for determining whether or not a position corresponding to the current position is hidden by the attached diagram on a map page corresponding to the map page information selected in the map page information selection process; In response to determining that the position corresponding to the current position is hidden by the attached drawing by the position situation determination process, the position corresponding to the current position and the attached object A page map display determination process for determining whether or not to display the page map based on a positional relationship with a range, and the page map display determination process for determining that the page map is to be displayed, This is for executing page map display processing for displaying at least a part of the page map on the display screen based on electronic book information.

  According to the present invention, a map page included in an electronic book can be used more effectively.

It is a block diagram which shows the example of a structure of the navigation apparatus provided with the function as an electronic book apparatus. It is explanatory drawing for demonstrating the structure of a control part and a memory | storage part. It is explanatory drawing which shows the example of the storage state of map page information. It is explanatory drawing which shows the example of the storage state of division | segmentation map range information. It is explanatory drawing for demonstrating the outline | summary of a map page. It is a flowchart which shows the example of a page map display process. It is explanatory drawing for demonstrating the division | segmentation of a grid. It is explanatory drawing for demonstrating the example of the image displayed on a display screen. It is explanatory drawing for demonstrating the division | segmentation of a grid. It is explanatory drawing for demonstrating the example in the case of displaying and shifting the present position icon from the actual present position.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a block diagram showing an example of a configuration of a navigation device 100 having a function as an electronic book device according to an embodiment of the present invention. As shown in FIG. 1, the navigation device 100 includes a control unit 10, a storage unit 20, a memory 30, a display unit 40, a sensor unit 50, a communication unit 60, and an input unit 70. Although not shown, the navigation device 100 includes a CPU (Central Processing Unit), a program storage unit, an OS (Operating System), and the like.

  The control unit 10 is constituted by, for example, a CPU, and the navigation device 100 is configured according to a computer program (a computer program for causing the navigation device 100 to control the operation, including a navigation program and an electronic book program) stored in the storage unit 20. Centralized control of each element, route search function, route guidance function, service information (POI (Point Of Interest) such as store information such as gas stations, convenience stores, ramen shops, hotels and inns, famous facility information, resort information ) Various functions for executing various processes including an information retrieval function for retrieving information). Note that these various functions are realized by known techniques included in general navigation devices.

  In addition, the control unit 10 in this example has a function for exhibiting a function as a general electronic book device (for example, a function for displaying an electronic book on a display screen, a page turning function, etc.), and a navigation device. More effective navigation can be performed by interlocking with the function as.

  Moreover, the control part 10 in this example displays the information which shows the page which comprises the electronic book and electronic book which satisfy | fill predetermined conditions from the electronic book information memorize | stored in the memory | storage part 20, for example according to a user's operation. It has a function to perform a search process. Note that the search key in this case is not limited to the search character string, and various search conditions (for example, search genre and issue date) can be used. In addition, since a general technique is used for the information search method based on the search key, a detailed description thereof is omitted here.

  The memory 30 is a storage medium that temporarily holds various types of information processed by the control unit 10 and is configured by a semiconductor storage device such as a RAM.

  The display unit 40 has a function of outputting various types of information in a form that can be recognized by the user, and includes, for example, a display device (display device, monitor) that displays image information. The display unit 40 displays the electronic book on the display screen of the display device, and changes and displays the display magnification and the display page according to the user's operation.

  The sensor unit 50 has a function of measuring the current position of the navigation device 100 (that is, the current position of the user). For example, the sensor unit 50 receives a GPS signal transmitted from a GPS satellite, and positions based on the GPS signal. A GPS sensor that measures the amount of movement, a speed sensor that measures the amount of movement (distance) from the initial position, a gyro sensor that measures the traveling (movement) direction, and the like.

  A GPS sensor is a so-called GPS receiver, receives a GPS signal radiated from a GPS satellite, measures a distance (pseudo distance) between the GPS satellite and the GPS receiver itself, and receives a plurality of satellites. Are simultaneously received to calculate the current position (GPS positioning solution) of the GPS receiver itself.

  In addition to the GPS receiver (antenna) that receives the GPS signal, the sensor unit 50 has a function of performing processing such as decoding of the received GPS signal and notifying the control unit 10.

  The communication unit 60 is connected to a communication network such as the Internet wirelessly or by wire, and has a function for transmitting / receiving information to / from an external device such as a management server connected to the communication network.

  The input unit 70 has a function of accepting various instructions to the control unit 10 from the user. In this example, the input unit 70 includes, for example, operation buttons displayed on the display screen of the display unit 40.

  FIG. 2 is an explanatory diagram for explaining the configuration of the control unit 10 and the storage unit 20 of this example. As shown in FIG. 2, the control unit 10 includes a sensor information processing unit 11, a communication processing unit 12, a search unit 13, a map page information selection unit 14, a current position situation determination unit 15, and a page map display determination. A unit 16, a page map display unit 17, and a route search unit 18 are included.

  The sensor information processing unit 11 has a function of executing processing for acquiring or storing sensor information such as position information and speed information by the sensor unit 50. That is, the navigation device 100 specifies the current position of the user by the sensor information processing unit 11.

  The communication processing unit 12 has a function of executing processing for transmitting and receiving various types of information by the communication unit 60.

  The search unit 13 has a function of executing a process of searching for map page information indicating a map range including the current position of the user specified by the sensor information processing unit 11. The map page information will be described in detail later (see FIG. 3).

  In addition, the search unit 13 in this example associates road map information and map page information, which are two types of map information described later, with map page information corresponding to the road map information, that is, articles about the region being posted. It has a function of performing a process of searching for an electronic book and the number of pages. With such a configuration, variations can be provided depending on how to use the electronic book. The road map information and the page map information may be associated with each other.

  The map page information selection unit 14 has a function of executing processing to select (priority) map page information having a large scale of the corresponding page map when there is a plurality of map page information searched by the search unit 13. . In this example, the map page information selection unit 14 selects at least one map page information based on map page information and divided map range information (including attached diagram information) described later.

  In addition, attached map information is a map whose display is hidden by the attached map within the map range of the page map when there is an attached map that is a map attached to the page map. It is the information which shows the attached figure range which is a range. The attached figure information in this example is stored in the divided map range information storage unit 24 described later, and the attached figure information included in the navigation device 100 will be described in detail later (see FIG. 4). An example of a method for displaying the page map will be described in detail in the description of the page map display process described later (see FIG. 6).

  The current position situation determination unit 15 includes a position corresponding to the current position of the user on the page map corresponding to the map page information selected by the map page information selection unit 14 (that is, on the page of the electronic book). It has a function of executing processing for determining whether or not it is hidden. In this example, the current position situation determination unit 15 is based on a map range corresponding to a pre-stored page map and an attached figure range indicating a map range hidden by the attached figure out of the map range. Then, it is determined whether or not the position corresponding to the current position is hidden by the attached drawing.

  The page map display determination unit 16 arranges the attached map superimposed on the page map when the current position situation determination 15 determines that the position corresponding to the current position is hidden by the attached map. In the case where it is determined that the position where the page map has been drawn is determined to be the position corresponding to the user's current position if there is no attached figure), the position corresponding to the current position And a function of executing processing for determining whether or not to display a page map based on the positional relationship between the attached drawing range and the attached drawing range. In this example, the page map display determination unit 16 performs determination based on the degree to which the current position is hidden on the page map.

  The page map display unit 17 performs a process of displaying at least a part of the page map on the display screen based on electronic book information to be described later when the page map display determination unit 16 determines to display the page map. Has the function to execute. An example of the method for determining the display range of the page map will be described in conjunction with the description of the page map display process described later (see FIG. 6).

  The page map display unit 17 displays a page map corresponding to the map page on the display screen of the display unit 40 based on the map page information selected by the map page information selection unit 14 (that is, a map posted on the map page). It has a function of executing processing for displaying at least one copy. In this example, the page map display unit 17 displays an image (a part or all of the page map) according to the display range determined by a page map display process (see FIG. 6) described later. In addition, the page map display unit 17 changes the displayed page map, changes the display range, enlarges, reduces, and the like in accordance with a user operation.

  The route search unit 18 performs route search processing for searching for a recommended travel route from the departure point (for example, the current position) through the waypoint to the destination. In the route search processing, for example, input of destination information and waypoint information from the user is received, and position information of the destination and waypoint is specified based on the received destination information and waypoint information. And a search route (recommended travel route) from the current position to the destination with reference to the map information based on the current position information measured by the sensor unit 50, and a travel route composed of a road map including the guide route Performs processing to generate a surrounding map. In addition, since a well-known technique is used about a route search process, detailed description here is abbreviate | omitted. In addition, information necessary for route search processing, for example, map information used for specifying the current position and generating a map around the moving route may be stored in the storage unit 20 in advance, or the communication unit 60 may be used. It is good also as a structure acquired from an external management server.

  In addition, the route search unit 18 in this example has a function of performing a process of receiving a destination on a display screen displaying a page map. In this case, for example, the user's touch operation on the displayed page map may be received, and the latitude and longitude corresponding to the position where the touch operation is received may be stored as the destination.

  The storage unit 20 is a storage medium that includes a ROM, a RAM, and the like, and stores various computer programs used by the navigation device 100. Moreover, in this example, as shown in FIG. 2, the storage unit 20 includes an electronic book information storage unit 21, a road map information storage unit 22, a map page information storage unit 23, a divided map range information storage unit 24, An attached drawing range information storage unit 25.

  The electronic book information storage unit 21 is a storage medium that stores electronic book information including page information for displaying each page constituting the electronic book. The electronic book information storage unit 21 in this example stores a plurality of pieces of electronic book information. Each electronic book information includes the page information, the date and time when each electronic book was stored, the publication date of the book, and the author. Various information about electronic books, such as publishers and publishers. Electronic books include electronic books of various genres such as general travel guidebooks that provide information on specific areas, operation manuals that explain how to operate machinery, etc. And

  In this example, the electronic book information is image data related to a map page on which a map included in the electronic book is posted, and is a page map that is a map posted on the map page and a diagram attached to the page map. It is assumed that the attached drawing is a piece of image data. That is, the attached drawing in this example is not image data independent of the page map. In addition, information obtained by dividing a map page according to a predetermined rule and the arrangement and range information of an attached diagram (for example, a cut map) are not included as electronic book information but information included as divided map range information described later. .

  The road map information storage unit 22 is a storage medium that stores map information divided into a predetermined grid (in this example, a rectangular range divided by a constant latitude width and longitude width). In addition to being stored in the road map information storage unit 22, the map information can be stored in an auxiliary storage device as a removable medium called an SD memory card, a CD-ROM, a DVD-ROM, or the like. Further, the map information may be downloaded via a communication network such as the Internet. Note that the “map page” in this example is one of the pages constituting the electronic book (that is, one image), whereas the map indicated by the road map information was originally created as map data. It is different in that. Hereinafter, the “road map” may be simply referred to as “map”.

  The map page information storage unit 23 is information indicating a map range that is a latitude / longitude range of a page map included in a plurality of map pages included in an electronic book that is an electronic book (that is, a map range indicating a map range). It is a storage medium that stores map page information that is information related to the map page including the information.

  FIG. 3 is an explanatory diagram illustrating an example of a storage state of map page information in the map page information storage unit 23. As shown in FIG. 3, the map page information includes page map information and character string information.

  Here, “page map information” is information related to a map (that is, a page map) included in a map page. In this example, the page map information includes the name of the page map, the map range of the page map, and the scale of the page map.

  In this example, the case where the map range in each page map information is defined by the latitude and longitude of the four corners of the page map will be described as an example.

  “Character string information” refers to information related to a character string (for example, content of a sentence, keyword, map, etc.) when a character string (for example, an article or the like) is arranged on a map page on which a page map is posted. Position on the page).

  In addition, each element included in the map page information may be configured to be set according to the information that the book has when digitizing the book, and can be set by the provider of the electronic book or the user of the navigation device 100 It is good also as a simple structure. Moreover, when the navigation apparatus 100 sets the page map portion in the map page as a main display target, the map page information may be configured only by page map information as information regarding the map page.

  The divided map range information storage unit 24 is a storage medium that stores divided map range information indicating a divided map range obtained by dividing the map range indicated by the map page information according to a predetermined rule. In this example, the case where a divided map obtained by dividing a map page into a grid shape with a predetermined length is used as an example will be described as an example. The rule for dividing the map range is not particularly limited, and for example, the map range may be divided by a predetermined latitude / longitude range.

  Further, in the divided map range information in this example, each divided map range in the map page is associated with attached diagram information indicating the presence or absence of an “attached diagram” that is a diagram drawn on the page map. . That is, in this example, by storing information indicating the presence / absence of an attached figure for each divided map range, an attached figure that is a figure drawn on the page map exists on the map page included in the electronic book. The attached figure information indicating whether or not to do so is stored.

  In addition, it is good also as a structure which manages map page information and attached figure information with one table, without dividing | segmenting and managing a map page. Moreover, it is good also as a structure which divides | segments and manages the page map in a map page.

  FIG. 4 is an explanatory diagram illustrating an example of the storage state of the divided map range information in the divided map range information storage unit 24. As shown in FIG. 4, the divided map range information includes a posting page, a horizontal index code, a vertical index code, a map name, a divided map range, and a “presence flag” as attached figure information.

  Here, “published page” is a number indicating the posted page of the map page in the electronic book.

  The “horizontal index code” and the “vertical index code” are codes for specifying a divided map range in the map page. The index code will be described again together with the description of the map page configuration (see FIG. 5).

  The “map name” is the name of the map page itself. In this example, a case where a map page and a divided map range are managed in association with each other by a map name and a posting page will be described. Note that the method for associating the map page with the divided map range is not particularly limited, and for example, the divided map range information may be stored in a lower hierarchy of the map page information.

  The “division map range” indicates the latitude and longitude of each division map range obtained by dividing the map page. In this example, the latitude and longitude of the four corners of the divided map range divided into quadrangular shapes are set.

  The “presence flag” is information indicating the presence / absence of an attached diagram in each divided map range. In this example, the following values are set as the presence flag. 0: Only the attached map exists on the divided map area on the map page (a completely hidden area). 1: There is no attached figure on the divided map area on the map page (area not hidden). 2: Only the attached figure does not exist on the divided map area on the map page (partially hidden area).

  In addition, the presence flag in this example may indicate that the map itself indicated by the divided map range is an attached diagram with respect to another map. That is, for example, when the attached diagram is a map (hereinafter described as an example of a cut map) and the map range is set in the cut map, “3: cut map” is set as the presence flag. And By managing the cut map in which the divided map range is set as one of the divided map range information, when the user's current position is within the map range indicated by the cut map, the display range is based on the cut map portion. Will be able to determine.

  Here, in order to clarify the concept of the “attached drawing” in the present example, the map page will be described below.

  FIG. 5 is an explanatory diagram for explaining the outline of the map page in this example. As shown in FIG. 5, in this example, the map page MP has a configuration in which a map (cut map) CM with a different scale is arranged on a base page map (bottom map) BM. The following explanation will be given. In this example, it is assumed that a cut frame CF indicating a range corresponding to the cut map CM is arranged on the lower map BM.

  FIG. 5 is an example of a map page on which only the page map is posted (that is, there is no sentence posting portion or the like). That is, in FIG. 5, the lower map BM is a “page map” here. Further, the cut map CM as an attached drawing is a part related to the page map in this example, so here it will be described as an “example of a map page on which only a page map is posted”.

  The attached figure range information storage unit 25 displays an attached figure range which is a map range whose display is hidden by the attached figure out of the map range of the page map when the attached figure exists on the map page. It is a storage medium for storing attached drawing range information shown. In this example, it is assumed that the attached figure range information is stored in association with the map page information and the divided map range information. Therefore, it can be said that the presence flag in this example is information accompanying the attached drawing range information.

  Next, a method for creating map page information and divided map range information in this example will be described. When the navigation device 100 handles the map page shown in FIG. 5, first, the map range of the page map posted on the map page (latitude and longitude of the four corners of the substantially rectangular map) is set. Then, the page map (or map page) is divided according to a predetermined rule, and the map range of the divided page map (when divided into quadrangular shapes, the latitude and longitude of the four corners of the divided portion. And the index code is set for each divided map range.

  Specifically, first, the map range of the lower map BM is set when it is assumed that there is no cut map CM on the map page MP (see FIG. 3). Next, the map page MP is divided into a grid, and an index code is assigned to each divided map range (grid). In this example, as shown in FIG. 5, an index code is given so that one grid can be specified by a combination of a vertical index code LI and a horizontal index code SI (see FIG. 4). Then, a map range (divided map range) is set for each grid.

  The creation of the map page information and the divided map range information corresponding to the map page may be configured, for example, by a provider of electronic book information. In addition, the user of the navigation device 100 may be configured to be able to set map page information.

  As an effect of the cut map itself, since the space efficiency of the map page can be improved, the digital map has the same effect. That is, if it is not so effective, there is no need to arrange a map page, which can contribute to data capacity reduction.

  Next, an example of the operation of the navigation device 100 that implements the page map display method executed by the navigation device 100 described above will be described with reference to FIG. Note that detailed descriptions of processes not particularly related to the present invention may be omitted.

  FIG. 6 is a flowchart illustrating an example of a page map display process executed by the navigation device 100. In the page map display process, a process for displaying at least one part of the page map on the display screen of the display unit 40 is performed based on various types of information stored in the storage unit 20.

  In the page map display processing in the present embodiment, for example, when a screen showing an electronic book is displayed on the display screen of the display unit 40, the control unit 10 uses the input unit 70 to display the user A of the navigation device 100. It is started when a page map display request corresponding to the current position is received. The page map display process may be started when an arbitrary position is designated by the user instead of the current position.

  In the page map display process, first, the control unit 10 specifies the current position of the user A by the sensor information processing unit 16 (step S101).

  When the current position of the user A is specified, the control unit 10 causes the search unit 13 to search for map page information including the specified current position in the map range (that is, a map page on which a page map including the current position is posted). (Step S102).

  When the map page information is searched, the control unit 10 causes the map page information selection unit 14 to select map page information having a large scale corresponding to the searched map page information (step S103).

  When map page information is selected, the control unit 10 obtains divided map range information corresponding to the selected map page information (in this example, divided map range information associated with the same map name as the selected map page information). With reference to, a divided map range (grid) including the current position is extracted (step S104).

  When the grid including the current position is extracted, the control unit 10 confirms the presence flag associated with the extracted grid and determines whether the confirmed presence flag is “1” or “3” (step S <b> 1). S105). If it is determined that the presence flag is “1” or “3” (Y in step S105), the control unit 10 proceeds to a process in step S113 described later.

  On the other hand, if it is determined that the presence flag is not “1” or “3” (N in step S105), the control unit 10 determines whether the presence flag is “0” (step S106). If it is determined that the presence flag is “0” (Y in step S106), the control unit 10 considers that the selected map page information does not exist and excludes it from the selection target, and proceeds to the process in step S103. (Step S107).

  In this example, even when the retrieved map page information is not associated with map page information having a larger scale than the other map page information, the control unit 10 has the presence flag “0”. It is assumed that the divided map range information is selected and the process proceeds to step S113 described later. In this case, the control unit 10 displays a page map corresponding to the divided map range information, and indicates that there is a map corresponding to the current position of the user A in a part where the page map appears to be hidden by the attached drawing. It is good also as a structure which a user can recognize (for example, the display form of a page map or a katakari map is changed).

  On the other hand, if it is determined that the presence flag is not “0” (that is, if the presence flag is “2” and it is determined that the grid including the current position on the map page includes the lower map BM and the cut map CM) (step S106). N), the control unit 10 divides the extracted grid (that is, the grid including the current position) into the lower map BM portion and the cut map CM portion (step S108).

  FIG. 7 is an explanatory diagram for explaining grid division. FIG. 7 shows a grid C2 specified by the horizontal index code “C” and the vertical index code “2” in the map page shown in FIG. 5, “grid C2-1” indicating the lower map BM portion, and a cut map. An example in the case of dividing into “grid C2-2” indicating the CM portion is shown.

  As shown in FIG. 7, when the grid is divided into the range of the lower map BM and the cut map CM, the control unit 10 determines that the current position P is the cut map CM (attached) based on the current position information and the attached drawing range information. It is determined whether or not it is a hidden part (that is, whether or not the current position is included in the map range of the grid C2-1 corresponding to the back side of the grid C2-2) (step S109). If it is determined that the current position P is not a portion hidden by the cut map CM (N in step S109), the control unit 10 proceeds to a process in step S113 described later.

  On the other hand, if it is determined that the current position P is a portion hidden by the cut map CM (Y in step S109), the control unit 10 determines the boundary line (that is, the grid) between the lower map BM portion and the cut map CM portion from the current position P. The (shortest) distance X to the boundary line between C2-1 and the grid C2-2 is calculated (step S110) (see FIG. 7).

  After calculating the distance X, the control unit 10 determines whether or not the calculated distance X is equal to or less than a predetermined threshold value (step S111). If it is determined here that the distance X exceeds the predetermined threshold value (N in step S111), the control unit 10 proceeds to the process in step S107. The method for setting the “predetermined threshold value” is not particularly limited. For example, it may be fixed at a specific distance, or may be configured based on the length of the grid before division (for example, For example, 1/4 of the length of the long side of the grid.)

  On the other hand, if it is determined that the distance X is equal to or smaller than the predetermined threshold value (Y in step S111), the control unit 10 selects (additionally selects) a proximity grid of the selected grid (step S112). In this example, when it is determined that the calculated distance X is equal to or less than the threshold value, the control unit 10 extracts based on the positional relationship between the current position P and the attached drawing range (grid C2-2). The divided map range close to the divided map range (grid C2-2) indicated by the divided map range information is selected as the adjacent map range. Specifically, the control unit 10 sets a grid that is in contact with a point d on the boundary line corresponding to the calculated distance X (that is, a contact point d between the straight line indicating the distance X and the boundary line) to an adjacent map range (proximity grid). The proximity grid is selected by specifying (see FIG. 7).

  When the proximity grid is selected (additional selection), the control unit 10 determines the display range based on the divided map range information indicating the grid including the current position (step S113). In this example, the control part 10 determines the range centering on the grid (namely, grid containing a present position) extracted by page map display processing among page maps as a display range. Note that the method for determining the display range is not limited to this, and it is only necessary to consider the extracted grid, for example, determining the range including the entire extracted grid as the display range centered on the current position.

  When the display range is determined, the control unit 10 refers to the electronic book information storage unit 21 and displays an image corresponding to the determined display range (that is, an image including at least one part of the page map) on the display screen. (Step S114), the process here ends.

  FIG. 8 is an explanatory diagram for describing an example of an image displayed on the display screen 101 included in the navigation device 100. As shown in FIG. 8, at least a part of the page map is displayed on the display screen 101 of the navigation device 100. In addition, when displaying a page map, it is good also as a structure which the control part 10 adjusts the display magnification of a page map so that the whole selected grid may be settled in a display screen. At this time, the control unit 10 reads the image data corresponding to the map page on which the page map is posted from the electronic book information storage unit 21 to display the page map. However, the control unit 10 performs the page display process described above. It is preferable that image data corresponding to a grid close to the grid extracted in is preferentially read.

  In the above-described page map display processing, for example, as shown in FIG. 9, the cut map CM portion (grid G2-2) (not compatible with FIG. 5; the same applies hereinafter) is within the range of other grids. When the lower map BM portion (grid F2) included is touched, the control unit 10 selects the grid F2 as a proximity grid. At this time, the control unit 10 determines that the distance Y from the current position P to the boundary between the grid F2 and the grid G2-2 and the grid G2-1 that is a grid divided from the current position P to the grid G2-2. The distance Z to the boundary line between the grid G2-2 and the grid G2-2 may be compared, and the closer grid may be used as a proximity grid, or both distances may be compared with a predetermined threshold value to determine the proximity grid. It is good also as composition to specify.

  In the selection of the proximity grid, the control unit 10 may be configured to consider a history of a plurality of points. That is, when the user's current position moves away from the specified proximity grid, the proximity grid may not be included in the display range.

  As described above, in the above-described embodiment, the electronic book device that displays the electronic book on the display screen of the display device is image data regarding a map page on which a map included in the electronic book is posted, An electronic book including image data in which a page map (for example, the lower map BM) that is a map posted on the map page and an attached diagram (for example, a cut map CM) that is attached to the page map are combined. Map page information storing map page information in which an electronic book information storage unit 21 that stores information, a map range indicating a latitude / longitude range of a page map, a scale of a page map, and information related to a map page are associated with each other. Attached figure which is a map range in which the display is hidden by the attached figure out of the map area of the page map when the attached figure exists on the storage unit 23 and the map page An attached figure range information storage unit 25 for storing attached figure range information indicating a range, specifying a current position of the user A, searching map page information indicating a map range including the specified current position, and searching Map page information corresponding to the selected map page information is selected based on attached map range information (for example, presence flag) when there is a plurality of map page information selected On the MP, it is determined whether or not the position corresponding to the current position (for example, the current position P on the page map) is hidden by the attached drawing (for example, the cut map CM), and the position corresponding to the current position is attached. In accordance with the determination that it is hidden by the position, the position corresponding to the current position and the attached figure range (for example, the map range in the portion where the cut map CM overlaps in the lower map BM) Whether or not to display the page map based on the positional relationship, and in response to determining that the page map is to be displayed, based on the electronic book information, at least a part of the page map (for example, selected) The range of the divided map range) is displayed, so that the map page of the electronic book can be used more effectively.

  That is, it is possible to easily provide a map page on which a page map corresponding to the current position of the user is posted from among map pages including attached diagrams such as a cut map whose scale and contents are different from the basic map. It becomes like this.

  In addition, when the map page is displayed, the display range is determined so that the page map is displayed on the display screen, so that the load required for the user to operate the display range can be reduced. The page map of the electronic book can be used more effectively.

  In the above-described embodiment, the electronic book device (for example, the navigation device 100 having a function as an electronic book device) stores the divided map range information indicating the divided map range obtained by dividing the map range according to a predetermined rule. The attached map range information storage unit 21 includes, for each divided map range, a map range whose display is hidden by the attached map, and corresponding to the selected map page information. In response to the determination that the divided map range information indicating the divided map range obtained by dividing the large-scale page map is extracted from the map range information indicating the divided map range including the current position and the page map is displayed. The portion of the page map corresponding to the divided map range indicated by the extracted divided map range information (for example, a range centered on the selected divided map range) Since a configuration to be displayed on the display screen, it becomes possible to extract and view portion indicating the current position of the user in the map page, it is possible to improve the convenience of the electronic book device.

  In other words, when the display screen of the electronic book device is smaller than the map provided on paper media, users who need to move the display range, change the display magnification, etc. by displaying an image of the appropriate divided map range The load of can be reduced.

  In the above-described embodiment, a case has been described in which map page information including a page map with a large scale is preferentially selected. However, the navigation device 100 may have priority levels set in advance in map page information or page maps. The map page information or the page map that matches the preference information indicating the user's preference may be preferentially selected.

  Although not particularly mentioned in the above-described embodiment, an electronic book device (for example, the navigation device 100 having a function as an electronic book device) has a position corresponding to the current position (for example, the current position in the map range). When the position corresponding to the current position of the page map (for example, the lower map BM) is not hidden by the attached drawing in response to the determination that the position P) is hidden by the attached drawing (for example, the cut map CM) It is good also as a structure displayed in a different display mode.

  That is, for example, the navigation device 100 is configured to give a difference in the display mode (for example, the brightness of the image) of the lower map BM when the current position is hidden behind the cut map CM and when the current position is hidden behind the cut map CM. Even when the entire page map with the attached figure superimposed on the display screen is not displayed, the user can easily recognize whether the displayed image is a page map or an attached figure such as a cut map. It becomes like this. In addition, by enabling the user to recognize that a page map whose current position is hidden is displayed, it is possible to prevent the user from misidentifying that the current position is on the displayed page map. Will be able to.

  Further, when the page map is displayed in a state where the current position P is hidden by the cut map CM, the boundary line between the page map and the cut map is highlighted, or a predetermined icon is displayed on the page map and the cut map. It is good also as a structure shown on the boundary line.

  Further, the navigation device 100 may be configured to highlight the lower map BM, for example. In this case, when the page map is displayed in a state where the current position P is hidden by the cut map CM, the structure is distinguished from the case where the page map indicating the current position is displayed by dimming the highlight color. Also good.

  Although not particularly mentioned in the above-described embodiment, an electronic book device (for example, the navigation device 100 having a function as an electronic book device) has a position corresponding to the current position (for example, on the map page MP). When it is determined that the current position P) is hidden by the attached drawing (for example, the cut map CM), a dislocation position that satisfies a predetermined condition with respect to the position corresponding to the current position is identified and displayed on the display screen. It is good also as a structure which displays the present position icon which shows a user's present position in the position corresponding to a shift position with respect to the displayed page map (namely, on the image which shows at least one part of a map page).

  FIG. 10 is an explanatory diagram for describing an example in which the current position icon is displayed while being shifted from the actual current position. As shown in FIG. 10, when the navigation device 100 displays the shift position of the current position, the control unit 10 determines whether or not the current position P on the grid is within the cut map CM portion (grid G2-2). A configuration in which a dislocation position DP is set in the proximity grid F2, which is a grid that satisfies a predetermined condition in relation to the grid G2-2, and is displayed on the display screen when it is determined and within the grid G2-2 And it is sufficient. At this time, the control unit 10 determines the positional relationship between the boundary line and the dislocation position DP based on the distance Y from the current position P on the grid to the boundary line between the grid G2-2 and the adjacent grid F2. It is good also as a structure (For example, the distance of the distance Y from the boundary line is made into the distance of the dislocation position DP etc.).

  With such a configuration, when a page map in which the current position is hidden is displayed, the relevance between the page map and the current position of the user A can be shown. In this case, the current position icon may have a color and a shape that are different from those in the case where the current position icon is hidden, thereby clearly indicating that the information is ambiguous. Further, the relationship between the dislocation position and the current position may be clearly indicated by connecting them with a straight line, for example.

  Further, even if the current position is not the latitude and longitude that is hidden in the attached diagram, the latitude and longitude of the outer periphery of the map (on the lower side of C3 in FIG. 5, that is, on the edge of the map page MP or on the top, bottom, left, and right grid lines of the cut map CM) Thus, the same processing may be performed to set the dislocation position of the current position in a grid that is close or within a predetermined distance.

  In the embodiment described above, the electronic book device (for example, the navigation device 100 having a function as an electronic book device) is detected from the position corresponding to the current position (for example, the current position P within the map range). The distance Y to the boundary between the map ranges that are not hidden by the attached figure range and the attached figure (for example, cut map CM) is calculated, and the value indicating the calculated distance Y is a predetermined threshold value. If the page map is exceeded, it is determined that the page map is not displayed, and the selection of the map page information is canceled according to the determination that the page map is not displayed, and the selected map page information is excluded from the selection target. The map page information is newly selected in response to the exclusion of the map page information from the selection target, so even if the page map is displayed, the information around the current position is displayed. Even such as when it is not possible to present, it is possible to present to the user selects a page map indicating a broader map.

  In the above-described embodiment, the electronic book device (for example, the navigation device 100 having a function as an electronic book device) determines that the page map is displayed (for example, a position corresponding to the current position (for example, On the page map (for example, on the lower map BM) based on the positional relationship between the current position P in the map range) and the attached figure range (for example, the range where the cut map CM of the lower map BM is superimposed). Since the divided map range that is close to the divided map range indicated by the extracted divided map range information is selected as the close map range, and the divided map range information that indicates the selected close map range is extracted, a plurality of grids are extracted. The page map around the current position can be displayed.

  In the above-described embodiment, the electronic book device (for example, the navigation device 100 having a function as an electronic book device) determines the divided map range indicated by the extracted divided map range information as the attached figure range and the others. The current position in the divided map range divided from the position corresponding to the current position (for example, the current position P in the grid C2-2) on the page map is divided into ranges (for example, grid C2-2 and grid C201). A distance X to the boundary line between each of the divided map ranges (for example, grid C2-2) and other divided map ranges (for example, grid C2-1) is calculated, and the value indicating the calculated distance is specified In addition to the divided map range information indicating the divided map range including the current position among the divided divided map ranges, the corresponding Since the divided map range information indicating the divided map range in which the value indicating the separation X is determined to be equal to or less than the specific threshold is extracted, the page map indicating the map around the current position is efficiently extracted. Will be able to.

  Although not particularly mentioned in the above-described embodiment, not only the map range but also the POI may be stored in association with the map page information. Further, the navigation device 100 accepts the input of the latitude route and the selection of the POI by the user on the screen displaying the map page, searches the received latitude route and the position of the POI based on the road map information, and starts from the current position. It may be configured to search for a recommended travel route and start route guidance based on road map information. With such a configuration, the electronic book can be effectively used in the navigation device.

  Further, when the map page information is stored in association with the POI, the navigation device 100 specifies the POI closest to the specified current position of the user, and the distance from the current position to the specified POI is specified. If it is within the threshold value, a grid including this POI may be selected. In this case, the navigation device 100 may calculate the specific threshold based on the scale of each map. With such a configuration, the page map can be displayed in a manner in which the POI is easy to see.

  Although not particularly mentioned in the above-described embodiment, the navigation device 100 as an electronic book device accesses a server provided with electronic book information through the communication unit 60 and downloads the electronic book information, thereby displaying the display device. Alternatively, the electronic book may be displayed on the display screen.

  INDUSTRIAL APPLICABILITY The present invention is industrially useful in an industry that handles devices that display electronic books, and is also useful in the electrical appliance market such as car navigation devices that can display electronic maps.

DESCRIPTION OF SYMBOLS 10 Control part 11 Sensor information processing part 12 Communication processing part 13 Search part 14 Map page information selection part 15 Current position situation determination part 16 Page map display determination part 17 Page map display part 18 Path search part 20 Storage part 21 Electronic book information storage Unit 22 Road map information storage unit 23 Map page information storage unit 24 Division map range information storage unit 25 Attached figure range information storage unit 30 Memory 40 Display unit 50 Sensor unit 60 Communication unit 70 Input unit 100 Navigation device

Claims (8)

An electronic book device that displays an electronic book on a display screen of a display device,
Image data relating to a map page on which a map included in the electronic book is posted, and a page map that is a map posted on the map page and an attached diagram that is a figure attached to the page map are combined into one body. Electronic book information storage means for storing electronic book information including the image data,
Map page information storage means for storing map page information in which a map range indicating a latitude / longitude range of the page map, a scale of the page map, and information on the map page are associated;
Attached figure range information indicating an attached figure range that is a map range that is hidden by the attached figure out of the map range of the page map when the attached figure exists on the map page Attached figure range information storage means for storing
Current position specifying means for specifying the current position of the user;
Map page information search means for searching map page information indicating a map range including the current position specified by the current position specifying means;
Map page information selection means for selecting map page information with a large scale of the corresponding page map when there is a plurality of map page information searched by the map page information search means;
Based on the attached figure range information, it is determined whether or not the position corresponding to the current position is hidden by the attached figure on the map page corresponding to the map page information selected by the map page information selecting means. Current position status judging means for
When the current position situation determination means determines that the position corresponding to the current position is hidden by the attached drawing, the positional relationship between the position corresponding to the current position and the attached drawing range is Page map display determination means for determining whether to display the page map based on;
Page map display means for displaying at least a part of the page map on the display screen based on the electronic book information in response to the page map display determining means determining to display the page map. An electronic book device characterized by that. Divided map range information storage means for storing divided map range information indicating a divided map range obtained by dividing the map range according to a predetermined rule;
The attached figure range information indicates a map range whose display is hidden by the attached figure for each divided map range,
The map page information selecting means selects a divided map range obtained by dividing the large-scale page map from among the divided map range information corresponding to the selected map page information indicating the divided map range including the current position. A divided map range information extracting means for extracting the divided map range information shown,
The page map display means is divided map range information extracted by the divided map range information extraction means from the page map in response to the page map display determination means determining that the page map is to be displayed. The electronic book device according to claim 1, wherein a portion corresponding to the divided map range indicated by is displayed on the display screen. The page map display means corresponds to the current position when the current position situation determination means determines that the position corresponding to the current position is hidden by the attached drawing. The electronic book apparatus according to claim 1, wherein the display is performed in a display mode different from that when the position is not hidden by the attached drawing. In response to determining that the position corresponding to the current position is hidden by the attached drawing by the current position state determination means, a dislocation position that satisfies a predetermined condition with respect to the position corresponding to the current position is determined. A dislocation position specifying means for specifying;
And a current position icon display means for displaying a current position icon indicating the current position of the user at a position corresponding to the shift position with respect to the page map displayed on the display screen by the page map display means. The electronic book device according to any one of claims 1 to 3. First distance calculating means for calculating a distance from a position corresponding to the current position to a boundary line between the attached drawing range and a map range that is not hidden by the attached drawing;
The page map display determination means determines that the page map is not displayed when a value indicating the distance calculated by the first distance calculation means exceeds a predetermined threshold value,
The map page information selection means includes:
In response to determining that the page map display determining means does not display the page map, a selection canceling means for canceling the selection of the map page information;
Selection target exclusion means for excluding the map page information whose selection is canceled by the selection cancellation means from the selection target by the map page information selection means,
The electronic book apparatus according to any one of claims 1 to 4, wherein the selection target exclusion unit newly selects map page information in response to the map page information being excluded from the selection target. When the page map display determination means determines that the page map is to be displayed, the division on the page map is performed based on the positional relationship between the position corresponding to the current position and the attached figure range. Proximate map range selection means for selecting a divided map range close to the divided map range indicated by the divided map range information extracted by the map range information extraction means,
The electronic book apparatus according to claim 2, wherein the divided map range information extracting unit extracts divided map range information indicating the close map range selected by the close map range selecting unit. Dividing means for dividing the divided map range indicated by the divided map range information extracted by the divided map range information extracting means into the attached figure range and other ranges;
On the page map, a distance from a position corresponding to the current position to a boundary line between the divided map range including the current position and each of the other divided map ranges in the divided map range divided by the dividing unit Second distance calculating means for calculating
Second distance determining means for determining whether a value indicating the distance calculated by the second distance calculating means is equal to or less than a specific threshold value;
The divided map range information extracting means includes, in addition to the divided map range information indicating the divided map range including the current position, among the plurality of divided map ranges divided by the dividing means, the corresponding second distance calculating means. The electronic book apparatus according to claim 2 or 6, wherein divided map range information indicating a divided map range determined to have a value indicating the calculated distance being equal to or less than a specific threshold value is extracted. An electronic book program for controlling an operation to display an electronic book on a display screen of a display device,
In the electronic book device,
A current position specifying process for specifying the current position of the user;
Image data relating to a map page on which a map included in the electronic book is posted, and a page map that is a map posted on the map page and an attached diagram that is a figure attached to the page map are combined into one body. A map range indicating a latitude / longitude range of the page map indicated by the electronic book information stored in the electronic book information storage means for storing electronic book information including the image data, a scale of the page map, and the map page Map page information indicating a map range including the current position specified in the current position specifying process from the map page information stored in the map page information storage means for storing the map page information associated with the information Map page information search process to search,
A map page information selection process for selecting map page information with a large scale of the corresponding page map when there is a plurality of map page information searched in the map page information search process;
Attached figure range information indicating an attached figure range that is a map range that is hidden by the attached figure out of the map range of the page map when the attached figure exists on the map page Corresponding to the current position on the map page corresponding to the map page information selected in the map page information selection process based on the attached figure range information stored in the attached figure range information storage means A current position situation determination process for determining whether the position is hidden by the attached drawing;
When the current position situation determination process determines that the position corresponding to the current position is hidden in the attached drawing, the positional relationship between the position corresponding to the current position and the attached drawing range is set. A page map display determination process for determining whether to display the page map based on;
A page map display process for displaying at least a part of the page map on the display screen based on the electronic book information in response to the determination that the page map is displayed by the page map display determination process. Ebook program to let you.

Images