JP4397369B2 - Map display device, map display method, map display program - Google Patents

Description

  The present invention relates to a map display device suitable for redisplaying a previously displayed map.

  With the spread of computer technology, it is widely used that a map created as electronic data is displayed on a computer instead of a conventional map on a paper medium.

  In such a map display device capable of displaying a map on a computer, the user can change the display range of the map by scrolling the map displayed on the computer with a mouse or the like. For example, when the user wants to know information around a certain road, the user can know the information around the road in detail by scrolling a small-scale map along the road.

  However, in such a map display device, when the user wants to confirm the information around the road again, the user has no choice but to scroll the map again along the road.

  In Patent Document 1 shown below, there is a technique for recording time series information, hierarchical structure information, and editing process information as data for each editing process when recording the history of the editing process for the data. Are listed.

Japanese Patent Laid-Open No. 2002-20518

  Examples of problems to be solved by the present invention include the above. An object of the present invention is to provide a map display device capable of easily redisplaying a previously displayed map.

According to the first aspect of the present invention, in the map display device, the map data acquisition means for acquiring the map data from the map data storage unit in which the map data in which a plurality of scale maps are converted into electronic data is recorded, and a user The history of the active spot, which is position information of the display range of the map searched or registered by the above, is recorded in the recording unit in time series, and the map display range after the map related to the active spot is displayed on the display screen Among the position information, the display range scale, or the display range orientation, the history of a plurality of display modes by scroll operation is associated with the history of the active spot as at least the display mode history of the display range position information. a map history recording means for sequentially recording in the recording unit, in response to the re-display request of the user, corresponding to the redisplay request the A map history acquisition unit that the history of the display mode corresponding to the active spot and the active spots is acquired from the recording unit, based on the history of the display mode corresponding to the active spot and the active spot corresponding to the redisplay request A map redisplaying unit for displaying a map corresponding to the redisplay request on the display screen after acquiring map data of the map corresponding to the redisplay request by the map data acquiring unit; The recording means includes a display included in the history of the display mode already recorded corresponding to the active spot from the state where the map related to the active spot corresponding to the re-display request is displayed on the display screen . new scrolling by scrolling in a direction different from the scrolling direction indicated by the position information in the range To record a history of the display mode of the direction of the map on the recording unit, the time series after the history of the display mode of the map display which was displayed on the screen at the start of the scrolling of the said different directions The history of the display mode corresponding to the recorded active spot is deleted, and recorded in chronological order before the history of the map display mode displayed on the display screen at the start of the scrolling in the different direction. The display mode history corresponding to the active spot is recorded.

In one aspect of the present invention, a map display device includes: a map data acquisition unit that acquires map data from a map data storage unit in which map data in which a plurality of scale maps are converted into electronic data is recorded; The history of the active spot, which is position information of the display range of the searched or registered map, is recorded in the recording unit in time series, and the map display range after the map related to the active spot is displayed on the display screen is recorded. Of the position information, the scale of the display range, or the orientation of the display range, at least as the history of the display mode of the position information of the display range, the history of a plurality of display modes by scroll operation is associated with the history of the active spot in time series to the a map history recording means for recording the recording unit in response to a redisplay request of the user, the Akti corresponding to the redisplay request A map history acquisition means Busupotto and a history of the display mode corresponding to the active spots is acquired from the recording unit, based on the history of the display mode corresponding to the active spot and the active spot corresponding to the redisplay request, Map re-recording means for displaying a map corresponding to the re-display request on the display screen after acquiring map data of the map corresponding to the re-display request by the map data acquiring means, and the map history record The means includes a display range included in the history of the display mode already recorded corresponding to the active spot from the state where the map related to the active spot corresponding to the re-display request is displayed on the display screen. new in the scroll direction by scrolling in a direction different from the scrolling direction indicated by the position information When recording in the recording portion of the history of the display mode of the Figure, it is recorded after time series than the history of the display mode of the map display which was displayed on the screen at the start of the scrolling of the said different directions In addition to deleting the history of the display mode corresponding to the active spot, it was recorded in chronological order before the history of the map display mode displayed on the display screen at the start of the scroll in the different direction The history of the display mode corresponding to the active spot is recorded.

The map display device includes map data acquisition means for acquiring map data, map history recording means, map history acquisition means, and map redisplay means. The map data is obtained by converting a plurality of scale maps into electronic data, and is stored in a map data storage unit such as a database. The map history recording means records an active spot history, which is position information of a display range of a map searched or registered by the user, in a time series in a recording unit, and displays a map related to the active spot on a display screen. As the history of the display mode of at least the position information of the display range among the position information of the display range of the map after being displayed, the scale of the display range or the orientation of the display range, the history of the plurality of display modes by scroll operation , The information is recorded in the recording unit in time series in association with the history of the active spot. Here, the recording unit is, for example, a main memory. The history of the display mode of the map is, for example, position information such as latitude / longitude of the center position of the map every predetermined time when the map is scrolled, or the scale size when the map scale is changed. And information on the orientation on the display screen when the map is rotated and displayed. The map history acquisition unit acquires, from the recording unit, the active spot corresponding to the redisplay request and the display mode history corresponding to the active spot in response to a user's redisplay request. The map redisplay means uses the map data acquisition means to obtain the map data of the map corresponding to the redisplay request based on the active spot corresponding to the redisplay request and the history of the display mode corresponding to the active spot. After the acquisition, a map corresponding to the redisplay request is displayed on the display screen . By doing in this way, the user can select and re-display the map related to the active spot to be displayed if it is an active spot searched or registered in the past, and displays the map related to the active spot It becomes unnecessary to redisplay the map by going back through the history of the display mode one by one. Moreover, the map of the display mode linked | related for every active spot can be displayed again easily. The map history recording means is included in the history of the display mode already recorded corresponding to the active spot from the state where the map related to the active spot corresponding to the re-display request is displayed on the display screen. When the display mode history is recorded in the recording unit for a map in a new scroll direction by scrolling in a direction different from the scroll direction indicated by the position information of the displayed display range , the scroll in the different direction is The history of the display mode corresponding to the active spot recorded in time series after the history of the display mode of the map displayed on the display screen at the start is deleted, and at the start of scrolling in the different direction the activator recorded prior in time sequence than the history of the display mode of the map which has been displayed on the display screen Leave it to record the history of the display mode corresponding to the spot. In this way, the user can always store the latest scroll direction in association with each active spot, and display the display mode related to the active spot from the map related to the active spot. When re-displaying the map related to the history , it is possible to perform re-display with consistency of the connection between the maps. Further, from the state where the map relating to the active spot corresponding to the re-display request is displayed, the position information of the display range included in the history of the display mode already recorded corresponding to the active spot is indicated. Even when the display mode history is recorded in the recording unit for the map in the new scroll direction by scrolling in a direction different from the scroll direction , the user can display the display at the start of scrolling in the different direction. It is possible to trace the history of the display mode corresponding to the active spot recorded in time series before the history of the map display mode displayed on the screen .

In one aspect of the map display device, the map history recording unit records a history of the display mode of the map displayed on the display screen every predetermined time in a storage unit, and the predetermined time is determined by the user. It can be set in advance. Thereby, the user can take a more detailed history by setting the predetermined time shorter, for example.

Another mode of the map display device, the map history recording means, said display if there is no change in the display mode of the map displayed on the screen, the display mode of the map displayed on the display screen The history is not saved in the storage unit. Thereby, the history only when there is a change in the display mode of the map can be recorded in the storage unit.

According to still another aspect of the map display device, the map history recording unit records in the storage unit when the maximum number of histories in the display mode that can be recorded in the storage unit is exceeded. The history of the display mode that is the oldest in time series is deleted from the history of the display mode being displayed . Thereby, the history of a new display mode can always be recorded.

  According to still another aspect of the map display device, the map corresponding to the re-display request is continuously re-displayed in time series by repeatedly using the map history acquisition unit and the map re-display unit. Continuous redisplay means is provided. This also allows the user to easily find a previously viewed point.

In another aspect of the present invention, a map display method for displaying a previously displayed map using map data stored in a map data storage unit, which is executed by a computer and converted into electronic data from a plurality of scales, is provided by a user. The history of the active spot, which is position information of the display range of the map searched or registered by the above, is recorded in the recording unit in time series, and the map display range after the map related to the active spot is displayed on the display screen Among the position information, the display range scale, or the display range orientation, the history of a plurality of display modes by scroll operation is associated with the history of the active spot as at least the display mode history of the display range position information. a map history recording step of sequentially recording in the recording unit, in response to the re-display request of the user, before corresponding to the redisplay request A map history acquisition step of acquiring history display mode corresponding to the active spot and the active spot from the recording unit, based on the history of the display mode corresponding to the active spot and the active spot corresponding to the redisplay request A map redisplaying step of displaying a map corresponding to the redisplay request on the display screen after obtaining map data of the map corresponding to the redisplay request from the map data storage unit , and the map history In the recording step, the display included in the history of the display mode already recorded corresponding to the active spot from the state where the map related to the active spot corresponding to the re-display request is displayed on the display screen . new scroll direction by scrolling in a direction different from the scroll direction indicated by the range position information When the history of the display mode of the map recorded in the recording section, recording the following time series than the history of the display mode of the map display has been displayed on the screen during the start of the scroll in different directions The history of the display mode corresponding to the active spot is deleted and recorded in time series before the history of the map display mode displayed on the display screen at the start of the scroll in the different direction. The history of the display mode corresponding to the active spot is recorded. This method also allows the user to select and display a map related to the active spot that the user wants to display if it has been searched or registered in the past, and displays the map before displaying the map related to the active spot. There is no need to display the map by going back through the mode history. Moreover, the map of the display mode linked | related for every active spot can be displayed again easily. In addition, this makes it possible for the user to always store the latest scroll direction in association with each active spot, and display a display related to the active spot from the map related to the active spot. When redisplaying the map related to the history of the mode, it is possible to perform redisplay with the consistency of the connection between the maps. Further, from the state where the map relating to the active spot corresponding to the re-display request is displayed, the position information of the display range included in the history of the display mode already recorded corresponding to the active spot is indicated. Even when the display mode history is recorded in the recording unit for the map in the new scroll direction by scrolling in a direction different from the scroll direction , the user can display the display at the start of scrolling in the different direction. It is possible to trace the history of the display mode corresponding to the active spot recorded in time series before the history of the map display mode displayed on the screen .

In still another aspect of the present invention, a program that is executed by a computer and that displays a previously displayed map using map data that has been converted into electronic data and stored in a map data storage unit is a user The history of the active spot, which is position information of the display range of the map searched or registered by the above, is recorded in the recording unit in time series, and the map display range after the map related to the active spot is displayed on the display screen Among the position information, the display range scale, or the display range orientation, the history of a plurality of display modes by scroll operation is associated with the history of the active spot as at least the display mode history of the display range position information. map history recording means for sequentially recording in the recording unit, in response to the re-display request of the user, corresponding to the redisplay request Serial active spot and map history acquisition unit that a history display mode corresponding to the active spots is acquired from the recording unit, based on the history of the display mode corresponding to the active spot and the active spot corresponding to the redisplay request , After acquiring the map data of the map corresponding to the re-display request from the map data storage unit, the computer functions as a map re-display means for displaying the map corresponding to the re-display request on the display screen , The map history recording means is included in the history of the display mode already recorded corresponding to the active spot from the state where the map related to the active spot corresponding to the re-display request is displayed on the display screen. scrolling in a direction different from the scroll direction indicated by the position information of which the display range Time more in the case of recording in the recording portion of the history of the display mode of the new direction of scrolling map, than the history of the display mode of the map the has been displayed on the display screen at the start of the scroll in different directions The history of the display mode corresponding to the active spot recorded later in series is deleted, and more time-sequential than the history of the map display mode displayed on the display screen at the start of scrolling in the different direction. The history of the display mode corresponding to the previously recorded active spot is recorded. This program also allows the user to select and display a map related to the active spot that the user wants to display if it is an active spot that has been searched or registered in the past. There is no need to display the map by going back through the mode history. Moreover, the map of the display mode linked | related for every active spot can be displayed again easily. In addition, this makes it possible for the user to always store the latest scroll direction in association with each active spot, and display a display related to the active spot from the map related to the active spot. When redisplaying the map related to the history of the mode, it is possible to perform redisplay with the consistency of the connection between the maps. Further, from the state where the map relating to the active spot corresponding to the re-display request is displayed, the position information of the display range included in the history of the display mode already recorded corresponding to the active spot is indicated. Even when the display mode history is recorded in the recording unit for the map in the new scroll direction by scrolling in a direction different from the scroll direction , the user can display the display at the start of scrolling in the different direction. It is possible to trace the history of the display mode corresponding to the active spot recorded in time series before the history of the map display mode displayed on the screen .

[Map display device]
(Device configuration)
Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an overall configuration of a map display device 100 according to an embodiment of the present invention.

  The map display device 100 is, for example, a personal computer, and includes a system bus 11, a CPU (Central Processing Unit) 12, a memory 13, a keyboard 14, a coordinate instruction device 15 such as a mouse, a display 16, and a printer 17. And the database 18. Here, the keyboard 14 and the coordinate designating device 15 are input devices. The display 16 and the printer 17 are output devices. The CPU 12 controls the entire map display device 100 and controls the input / output device.

  The CPU 12, the memory 13, and the database 18 are connected to the system bus 11. The keyboard 14, the coordinate instruction device 15, the display 16, and the printer 17 are also connected to the system bus 11 via an interface (not shown). The memory 13 here is a so-called main memory, and stores a map display program according to the present embodiment. Further, the database 18 stores, for example, map data obtained by converting a plurality of scale maps in Japan into electronic data, and each map data includes map information such as roads and buildings. As an example of a plurality of scale maps, for example, a 14-scale map between scales 1/6400000 and 1/781 is stored in the database 18 as map data.

  Next, the map display method according to the present embodiment will be specifically described. First, the user instructs the CPU 12 to start a map display program using the keyboard 14 and the coordinate instruction device 15. When the CPU 12 receives the command, it activates the map display program stored in the memory 13.

  When the map display program is activated, a menu screen on which an address can be input is displayed on the display 16, for example. The user inputs the address of the place where the map is to be displayed on the menu screen displayed on the display 16 using the keyboard 14 or the coordinate designating device 15.

  When the CPU 12 receives the address information of the place where the map is desired to be displayed, the CPU 12 acquires the map data of the map centered on the address from the database 18 and then displays the map on the display 16.

  In the map display device 100 according to the present embodiment, the user continuously scrolls the map displayed on the display 16 in this way by using a mouse or the like to continuously display the display range of the map displayed on the display 16. Can be changed. The details will be described below.

  A wide area map 20 shown in FIG. 2 shows how the display range of the map moves when the map displayed on the display 16 is scrolled. In the wide area map 20, a station 21, a road 22, and a track 23 are written. A display range of the map scrolled by the user is shown as a display range 25. That is, as shown in the map 31 of FIG. 5, the display 16 displays a map obtained by reducing the scale of the portion indicated by the display range 25 of the wide area map 20.

  Moreover, the scroll direction Sc is shown in the wide area map 20 of FIG. The user moves the display range 25 along the scroll direction Sc. In this way, the map display device 100 can continuously change the display range of the map displayed on the display 16.

  In the map display device 100 according to the present embodiment, the CPU 12 records the history of the display mode of the map displayed on the display 16 in time series in the memory 13 while the user scrolls the map displayed on the display 16. be able to. Therefore, the CPU 12 functions as map history recording means in the present invention. Here, as an example of the history of the display mode of the map, position information such as the latitude and longitude of the center position of the map every predetermined time when the map is scrolled as described below (hereinafter simply referred to as “map”). May be referred to as “position information”).

  Further, in response to a user's redisplay request, the CPU 12 can acquire a history corresponding to the redisplay request from the memory 13. Therefore, the CPU 12 functions as a map history acquisition unit in the present invention.

  Further, the CPU 12 can acquire map data from the database 18 based on the acquired history, and can redisplay a map corresponding to the history. Therefore, the CPU 12 functions as a map data acquisition unit and a map redisplay unit in the present invention.

  The wide area map 20 of FIG. 3 shows display ranges M1 to M8 recorded as a history when the user scrolls the map displayed on the display 16.

  As shown in the wide area map 20 of FIG. 3, the user first displays a map related to the display range M1 on the display 16 and then scrolls the displayed map along the scroll direction Sc, thereby elapses a predetermined time. Each time the map is displayed, the display range of the displayed map is changed in order of the display ranges M1, M2, M3, M4..., M7, M8, and finally the map related to the display range M8 is displayed on the display 16. . Here, the CPU 12 records the position information of the map displayed on the display 16 in the memory 13 in a time series as a history every time a predetermined time elapses. That is, the CPU 12 sequentially stores the map position information P1 to P8 related to the display ranges M1, M2, M3, M4..., M7, M8 in time series in the memory 13 every time the predetermined time elapses. Record. The position information P1 to P8 are latitude / longitude values of the center positions of the maps of the display ranges M1 to M8.

  Here, the predetermined time can also be set by the user in advance. Thereby, the user can take a more detailed history by setting the predetermined time shorter, for example.

  FIG. 4 shows an example of the history of position information recorded in the memory 13 in this way. As shown in FIG. 4, specifically, the history of position information is recorded in the memory 13 as a table having items of display range, position information, and recording number. In the table shown in FIG. 4, characters M1 to M8 are recorded as the display range. Actually, however, the display range may be a name indicating the display range (for example, an address or the vicinity of a specific station). For example, a name such as “•• station area”).

  In the position information, position information P1 to P8, that is, the latitude / longitude values of the center position of the map relating to each display range are recorded.

  The recording number is recorded by adding a predetermined value every time the map position information related to each display range is recorded from when the user starts scrolling the map. Therefore, the recording number increases in time series during scrolling. In the example of the table shown in FIG. 4, the record number is incremented by one each time map position information relating to each display range is recorded. For example, if the record number when the map position information related to the display range M4 is recorded is 4, the record number when the map position information related to the next display range M5 is recorded is 5. . From this record number, it can be seen that the map position information P5 related to the display range M5 was recorded one time later than the map position information P4 related to the display range M4. That is, the recording number indicates the time-series order in which the map position information related to the display range is recorded.

  When the position information of the recorded map exceeds the recordable maximum number of the memory 13, the CPU 12 deletes the oldest position information history in time series and records new position information. For example, in the table shown in FIG. 4, after the position information history with the recording number 1, that is, the display range M 1, position information P 1, and record number 1 history is deleted, new position information is recorded. Thereby, new position information can always be recorded.

  Here, when the user stops the scroll of the map displayed on the display 16 halfway, the CPU 12 stops recording the position information of the map in the memory 13 during the stop. This is because there is no change in the display range of the map displayed on the display 16 while the scrolling is stopped. Even if the CPU 12 records the map position information in the memory 13 at this time, the same position information is repeated. This is because there is no meaning. In this way, while the scrolling is stopped, the CPU 12 does not record the map position information in the memory 13, so that only the position information when the map display range is changed, that is, the map is scrolled. Only the position information is recorded in the memory 13.

  By doing as described above, the CPU 12 has a history of the display mode of the map previously displayed on the display 16 by the user, that is, in the case of the present embodiment, the map at every predetermined time when the map is scrolled. It is possible to record position information such as the latitude and longitude of the center position.

  Next, a method for reading the history of the recorded map display mode will be described. FIG. 5 shows an example of the display mode of the map displayed on the display 16.

  As shown in FIG. 5, a menu bar 32 is displayed on the display screen of the display 16 together with a map 31 in each display range along the scroll direction Sc. Here, a map related to the display range M4 is displayed as the map 31, and the name of the map related to the display range M4 is “ABC station area”. In the menu bar 32, a return button 33, a forward button 34, and a pull-down menu 35 are displayed. The user can instruct the CPU 12 to perform a redisplay request for redisplaying the map relating to the display range recorded in the memory 13 by operating the return button 33, the forward button 34, and the pull-down menu 35.

  For example, when the user selects “ABC station area” from the pull-down menu 35, the CPU 12 determines, based on the table shown in FIG. 4 in the memory 13, the map position information P 4 related to the display range M 4, that is, the display range. Information on the latitude and longitude of the center position of M4 is acquired. The CPU 12 acquires map data of a map related to the display range M4 from the database 18 based on the position information P4 and displays it on the display 16. In this way, the map 31 related to the display range M4 displayed on the display 16 in the process of scrolling by the user before is displayed again on the display 16. Here, although the display range displayed on the pull-down menu 35 will be described in detail later, an address or name searched or registered by the user is displayed.

  When the user presses the return button 33 after redisplaying the map 31 in the display range M4 on the display 16 as described above, the CPU 12 stores the position information of the map related to the display range M4 recorded in the process of scrolling before. The position information P3 of the map relating to the display range M3 that is recorded one time earlier than P4 is acquired from the table shown in FIG. The CPU 12 acquires map data of a map related to the display range M3 from the database 18 based on the position information P3 and displays it on the display 16. In this way, the map in the display range M3 displayed on the display 16 in the process of scrolling by the user before is redisplayed on the display 16.

  Here, when the user further presses the return button 33, the CPU 12 brings the position information P3 of the map related to the display range M3 recorded in the previous scrolling process one time earlier. The position information P2 of the map relating to the recorded display range M2 is acquired from the table shown in FIG. The CPU 12 acquires map data of a map related to the display range M2 from the database 18 based on the position information P2, and displays the map data on the display 16. In this way, the map related to the display range M2 displayed on the display 16 in the process of scrolling by the user before is displayed again on the display 16.

  As can be seen from the above, every time the user presses the return button 33, the display area is recorded one time earlier than the position information of the map related to the display area of the currently displayed map. The map relating to the position information of the map can be displayed again.

  In addition, when the user presses the return button 33 for a long time after redisplaying the map 31 related to the display range M4 on the display 16, the CPU 12 repeats the above-described operation every time a predetermined time elapses to display the display range. The map concerning each display range can be continuously redisplayed in the order of M3, M2, and M1. Therefore, the CPU 12 functions as a map continuous redisplay unit. As a result, the user can easily find a previously viewed point.

  The predetermined time may be set in advance by the user. By doing in this way, the user can adjust the reproduction | regeneration speed at the time of redisplaying the map which concerns on each display range continuously.

  On the other hand, when the user presses the forward button 34 after redisplaying the map 31 related to the display range M4 on the display 16, the CPU 12 stores the position information of the map related to the display range M4 recorded in the previous scrolling process. The position information P5 of the map related to the display range M5 recorded one time later than P4 is acquired from the table shown in FIG. The CPU 12 acquires map data of a map related to the display range M5 from the database 18 based on the position information P5 and displays it on the display 16. In this way, the map related to the display range M5 displayed on the display 16 in the process of scrolling the user before is displayed on the display 16.

  Here, when the user presses the forward button 34, the CPU 12 records one time later in time series than the map position information P5 related to the display range M5 recorded in the previous scrolling process. The map position information P6 related to the displayed range M6 is acquired from the table shown in FIG. The CPU 12 acquires map data of a map related to the display range M6 from the database 18 based on the position information P6 and displays it on the display 16. In this way, the map related to the display range M6 displayed on the display 16 in the process of scrolling by the user before is displayed on the display 16 again.

  As can be seen from the above, each time the user presses the forward button 34, the user relates to the display range recorded immediately after the position information of the map related to the display range of the currently displayed map. The map related to the map position information can be redisplayed.

  In addition, when the user presses the forward button 34 for a long time after redisplaying the map 31 in the display range M4 on the display 16, the CPU 12 repeats the above-described operation every time a predetermined time elapses to display the display range M5. , M6, M7, and M8, the map relating to each display range can be continuously displayed again. This also allows the user to easily find a previously viewed point.

  Next, a case where the user scrolls the map in a different direction from the previously scrolled direction after redisplaying the map 31 related to the display range M4 on the display 16 will be described.

  A wide area map 20 in FIG. 6 shows display ranges L1 to L3 recorded as a history when the user scrolls the map 31 displayed on the display 16 along the scroll direction Sca.

  As shown in the wide area map 20 of FIG. 6, the user first redisplays the map related to the display range M4 on the display 16 and then scrolls the displayed map along a scroll direction Sca different from the scroll direction Sc. By doing so, the display range of the displayed map is changed in the order of the display ranges L1 and L2, and finally the map related to the display range L3 is displayed on the display 16.

  The CPU 12 records the map position information displayed on the display 16 in the memory 13 in time series every time a predetermined time elapses. In other words, each time the predetermined time elapses, the CPU 12 records the map position information Pa1 to Pa3 related to the display ranges L1, L2, and L3 in order in the memory 13 in time series. The position information Pa1 to Pa3 is also specifically the latitude and longitude values of the center positions of the maps of the display ranges L1 to L3.

  FIG. 7 shows an example of a table of position information recorded in the memory 13 in this way. As can be seen from the table shown in FIG. 7, when the user scrolls the map in the scroll direction Sca different from the scroll direction Sc after redisplaying the map 31 related to the display range M4 on the display 16, the CPU 12 first FIG. 4 shows the position information P5 to P8 of the map related to the display range recorded after the time series, that is, the position information P5 to P8 of the map related to the display range M5 to M8, from the position information P4 of the display range M4 recorded. After erasing all from the table shown, the map position information Pa1 to Pa3 relating to the display ranges L1 to L3 are newly recorded in order. At this time, the CPU 12 sequentially records numbers after the recording number of the display range M4 as the recording numbers of the display ranges L1 to L3. For example, in the table shown in FIG. 7, the recording number of the display range L1 is the recording number 5 that is the recording number immediately after the recording number 4 of the display range M4.

  Next, a case where the user scrolls until the map related to the display range L3 is displayed on the display 16 and then operates the pull-down menu 35 to re-display the map 31 related to the display range M4 on the display 16 will be described. . When the user presses the forward button 34 at this time, the CPU 12 is recorded one time later in time series than the position information P4 of the map related to the display range M4 from the memory 13 as described above. The position information of the map related to the display range is acquired, but the information acquired at this time is not related to the position information P5 of the map related to the display range M5, but is related to the display range L1 as can be seen from the table shown in FIG. This is map position information Pa1. Therefore, the CPU 12 acquires map data of a map related to the display range L1 from the database 18 based on the position information Pa1, and displays the map data on the display 16.

  In this way, when the user scrolls in the direction different from the previous scrolling direction from the redisplayed map display range, the map position in the previous scrolling direction recorded in the memory 13 All the information is lost, and the position information of the map in the newly scrolled direction is recorded in the memory 13. In this way, when the user presses the forward button 34 or the back button 33 to redisplay the map, the display in which the change in the display mode of the map is consistent, in the case of the present embodiment, between maps It is possible to perform re-display with a consistent connection.

  As described above, in the map display device 100 according to the present embodiment, the CPU 12 causes the history of the display mode of the map displayed on the display 16 while the user scrolls the map displayed on the display 16, that is, this book. In the case of the embodiment, position information such as the latitude and longitude of the center position of the map every predetermined time when the map is scrolled can be recorded in time series. Further, in response to the user's redisplay request, the CPU 12 can redisplay the map corresponding to the redisplay request. In this way, the user can easily re-display the previously displayed map.

[Modification]
In the map display device 100 according to the above-described embodiment, when the scroll is performed in a predetermined direction, the history of the map position information related to the display range is recorded in the memory 13 in time series as the history of the map display mode. However, the application of the present invention is not limited to this. As a modified example of the map display device 100, the history of the position information of the map relating to the display range when scrolling is displayed instead of or additionally recorded in the memory 13 as the history of the display mode of the map. The history of changing the scale of the map being displayed and the history of changing the orientation on the display screen by rotating the displayed map are recorded in the memory 13 in time series as the history of the map display mode. Also good. Here, as an example of changing the orientation on the display screen by rotating the displayed map, the display screen is aligned with the north direction on the map. For example, changing the screen upward to the west direction on the map.

  When taking a history of changes in the scale of the displayed map, the items of the map scale other than the display range, position information, and recording number described in the table of FIG. Added. At this time, different recording numbers are assigned before and after the scale is changed. By doing so, the CPU 12 can acquire a map with a different scale from the database 18 corresponding to the recording number when redisplaying the history, so that the user can change the scale of the map before and after. You can see the situation again.

  In addition, when a history is obtained when the displayed map is rotated and the orientation on the display screen is changed, the table items in the memory 13 are displayed on the display screen in addition to the display range, position information, and recording number. An orientation item at is added. At this time, different recording numbers are assigned before and after the orientation on the display screen is changed. In this way, when redisplaying the history, the CPU 12 can display a map whose orientation has been changed on the display screen corresponding to the recording number, and the user can change the map before and after the map is rotated. You can see the situation again.

  As can be seen from the above, it goes without saying that even in the case of the map display device 100 according to the above-described modification, the user can easily re-display a previously displayed map.

  Even in the case of the map display device 100 according to the above-described modification, the CPU 12 may not record the history of the map display mode in the memory 13 while there is no change in the display mode of the map displayed on the display screen. good. Thereby, the history only when there is a change in the display mode of the map can be recorded in the memory 13.

  Also, in the case of the map display device 100 according to the above-described modified example, the CPU 12 determines that, among the histories recorded in the memory 13, if the maximum number of histories that can be recorded in the memory 13 is exceeded, The oldest history in time series may be deleted. Thereby, the history of a new display mode can always be recorded.

  Further, even in the case of the map display device 100 according to the above-described modification, the CPU 12 stores the history of new display modes in a time series from the state in which the map corresponding to the redisplay request from the user is displayed. In this case, all the history recorded in the memory 13 may be deleted before the history corresponding to the redisplay request. As a result, redisplay can be performed in which the consistency of changes in the display mode of the map can be taken.

  In the above embodiment, the user continuously changes the display range of the map displayed on the display 16 by scrolling the map displayed on the display 16 using a mouse or the like. However, the application of the present invention is not limited to this. Instead, the user may click on any point on the map displayed on the display 16 with the mouse to display a new map centered on the clicked point on the map. The display range of the map displayed on the display 16 can be changed. In this case, for example, each time a point on the map is clicked, the CPU 12 can record the position information of the map displayed on the display 16 in the memory 13 in a time series as a history illustrated in FIG. it can.

  Moreover, in said Example, although map data is stored in the database 18 of the map display apparatus 100, application of this invention is not restricted to this. For example, instead of or in addition to providing the database for storing the map data, the map display device 100 may be configured to acquire map data from an external map server or the like through a network or the like.

[Map display processing]
Next, a map display processing method according to the present embodiment will be described with reference to a flowchart. FIG. 8 shows a flowchart of map display processing according to the present embodiment.

  First, when the user starts to scroll the map displayed on the display 16, the CPU 12 records the position information of the map displayed on the display 16 in the memory 13 in time series every time a predetermined time elapses (step). S11).

  Next, the user operates the pull-down menu 35, the forward button 34, or the return button 33 displayed on the menu bar 32 shown in FIG. The CPU 12 is instructed to perform a redisplay request to be displayed (step S12). CPU12 acquires the positional information which concerns on the said predetermined display range from the memory 13 based on the redisplay request | requirement by a user (step S13). Thereafter, the CPU 12 obtains a map corresponding to the position information from the database 18 and then redisplays it on the display 16 (step S14).

  Further, when the user instructs the CPU 12 to re-display the map in the predetermined display range displayed previously by operating any one of the pull-down menu 35, the forward button 34, and the return button 33 again. The CPU 12 repeats the operations of step S12 to step S14 (step S15: Yes). For example, when the user clicks the forward button 34 or the back button 33 here, as described above, the time series of the map position information related to the currently displayed map display range. It is possible to re-display the map related to the position information of the map related to the display range recorded immediately before or immediately before. On the other hand, if the user has not instructed the CPU 12 to make a redisplay request, the CPU 12 ends the map display process (step S15: No).

  As described above, in this embodiment, the map display device displays a plurality of map data in which a plurality of maps are converted into electronic data and a history of the display mode of the map displayed on the display screen every predetermined time. Map history recording means for sequentially recording in the storage section, map history acquisition means for acquiring a history corresponding to the redisplay request from the storage section in response to a user's redisplay request, and corresponding to the redisplay request And a map redisplay means for displaying a map corresponding to the redisplay request after acquiring map data of the map corresponding to the redisplay request from the plurality of map data based on the history to be displayed. Thereby, the user can easily re-display the previously displayed map.

[Application example]
Next, application examples of the map display device 100 according to the present invention will be described. In the embodiment described above, the history of the display mode of the map displayed on the display screen, in other words, the operation history of the user is stored in the memory 13 in time series, but in the application example, it is further added. The history is also recorded in the memory 13 in time series for a predetermined address or name (hereinafter simply referred to as “active spot”) searched or registered by the user displayed in the pull-down menu. The details will be described below.

  FIG. 9 is a schematic diagram showing the structure of a data sequence of active spots recorded in the memory 13. In the example shown in FIG. 9, the data sequence of active spots is composed of n active spots from active spot (1) to active spot (n). In the pull-down menu, names of active spots (1) to (n) are displayed. Active spots (1) to active spots (n) are stored in time series, and numerals 1 to n in parentheses indicate a time series order of registration. Here, “registered in time series” specifically indicates that the user is registered in the order of the date and time when the user registers a predetermined address or name. As data of a predetermined address or name searched or registered by the user, the active spot (1) is the oldest data in time series, and the active spot (n) is the newest data in time series. . For example, when a user newly registers a predetermined address or name as an active spot, the predetermined address or name is registered as an active spot (n + 1).

The data of each active spot is composed of a data string of latitude / longitude and name of each active spot, and operation history. The operation history data string is composed of m pieces of operation history data from operation history data (1) to operation history data (m). Specifically, the operation history data is history data of the display mode of the map displayed on the display screen. In other words, the user's operation history from each active spot is recorded as operation history data in each active spot. In the embodiment described above, the position information history shown in FIG. 4 corresponds to this, and the operation history data in the operation history data (1) to the operation history data (m) are displayed in the display ranges M1 to M8. This corresponds to the history of position information for each display range up to. The numbers 1 to m in parentheses indicate the time series order of registration, that is, the recording numbers described in the previous embodiment. In this case, the entire table shown in FIG. 4 becomes one active spot and has the history of position information shown in FIG. As the name of the active spot, information on the display range M1, which is a place where scrolling is started, is used.

  FIG. 10 is a schematic diagram illustrating a structure of a data string when a new active spot is added to the data string of the active spot. In FIG. 10, as an example, it is assumed that the data sequence of active spots is composed of active spots (1) to (5). At this time, it is assumed that the user selects the active spot (3) from the pull-down menu and displays a map related to the active spot (3). In this case, when a user searches or registers a new predetermined address or name to display a map related to the predetermined address or name, that is, a new active spot is added to the active spot data string. In this case, the active spots (4) to (5) registered after time series of the active spots (3) are deleted. Then, the added new active spot is registered as the active spot (4).

  As can be seen from the above, the active spot also functions as a history of the map display mode in the present invention.

  Next, map display processing according to an application example will be described using a flowchart.

  First, when the map display device 100 displays a map related to a predetermined active spot and then returns from the predetermined active spot, that is, displays a map related to an active spot that is chronologically older than the predetermined active spot. Describe the case. FIG. 11 is a flowchart showing the map display process at this time. FIG. 12A shows an example of the menu bar 32a displayed on the display screen at this time, and FIG. 12B shows an example of the data sequence of the active spot.

  The menu bar 32a shown in FIG. 12A includes a return button 33a, a forward button 34a, and pull-down menus 35aa and 35ab. The pull-down menu 35aa is for displaying a list of active spots that are older in time than the active spot related to the currently displayed map, and the pull-down menu 35ab is more time-sensitive than the active spot related to the currently displayed map. This is for displaying a list of new active spots in series. Further, it is assumed that the data sequence of active spots in the map display process of FIG. 11 is composed of active spots (1) to (6). Hereinafter, the flowchart of the map display process of FIG. 11 will be described.

  The user displays a list of active spots by clicking the pull-down menu 35aa with the mouse. At this time, the CPU 12 creates a list of active spots to be displayed on the pull-down menu 35aa based on the active spots related to the currently displayed map. Specifically, assuming that the active spot relating to the currently displayed map is the active spot (4), the CPU 12, as shown in FIG. 12 (a), the active spot older than the active spot, The active spot (1) to the active spot (3) are created as a list in which the new ones are arranged in chronological order (step S21).

  The CPU 12 is a number indicating the time-series order of registration (hereinafter referred to as “active spot index”) added to the active spot relating to the currently displayed map. For example, the CPU 12 relates to the currently displayed map. If the active spot is the active spot (4), the active spot index is “4”.) Is determined whether it is greater than 0 (step S22). The process ends (step S22: No). For example, when the active spot index is “0”, there is no corresponding active spot. In this case, the CPU 12 ends the process. On the other hand, if the CPU 12 determines that the active spot index is greater than “0” (step S22: Yes), the process proceeds to the next step S23.

  Next, the user selects any active spot by clicking on the pull-down menu 35aa, or selects the previous active spot recorded in time series by clicking the return button 33a (step S23). When the CPU 12 detects that the active spot is selected by the user, the CPU 12 moves the map to the coordinate position of the selected active spot. In other words, the CPU 12 obtains a map relating to the active spot selected by the user from the database 18 and then displays it on the display screen (step S24).

  Next, the CPU 12 reduces the active spot index by the amount of movement. Specifically, when the user clicks on the pull-down menu 35aa and selects any active spot, the CPU 12 determines that the active spot related to the map displayed before the movement and the active spot related to the destination map are displayed. Reduce the active spot index by the number of active spots in between. On the other hand, when the user clicks the return button 33a to select the previous active spot recorded in time series, the CPU 12 decreases the active spot index by one. Further, the CPU 12 uses the number of operation history data strings in the destination active spot as the recording number (hereinafter referred to as “operation history index”) indicating the operation history data related to the map to be displayed in the destination active spot. Hereinafter, the “operation history storage number” is set (step S25), and the process ends.

  Next, when the map display device 100 displays a map related to the destination active spot and then returns and displays the operation history in the destination active spot, that is, in time series in the destination active spot. Next, a method for continuously displaying maps related to old operation history data will be described. FIG. 13 is a flowchart showing the map display processing at this time, and FIG. 14 shows an example of an operation history data string in the active spot.

  Here, it is assumed that the active spot relating to the currently displayed map is the active spot (3). As shown in FIG. 14, the active spot (3) has operation history data (1) to operation history data (7), and the active spot (2) has operation history data (1) to operation history data (6). ) And the active spot (1) has operation history data (1) to operation history data (8). Hereinafter, the flowchart of the map display process of FIG. 13 will be described.

  The CPU 12 displays a map related to operation history data corresponding to the operation history index. As described in the description of the flowchart of FIG. 11, the operation history index in the destination active spot is set with the number of operation history data strings in the destination active spot, that is, the operation history storage number. Accordingly, if the active spot related to the currently displayed map is the active spot (3), the currently displayed map is a map related to the operation history data (7) in the active spot (3).

  At this time, when the user wants to return and display the operation history, the user keeps pressing the button for a longer time than clicking the return button 33a (step S31). Hereinafter, the operation of pressing the button for a longer time than clicking is referred to as “long pressing”.

  When the CPU 12 detects that the return button 33a has been pressed for a long time, it is older in time series than the previous operation history data in the active spot (3), that is, the operation history data (7). A map related to the operation history data (6) is displayed (step S32). Thereafter, the CPU 12 decrements the operation history index by 1 (step 33).

  Next, the CPU 12 determines whether or not the operation history index is “0” or less (step S34). If the CPU 12 determines that the operation history index does not become “0” or less (step S34: No), the CPU 12 proceeds to the process of step S36. On the other hand, when the CPU 12 determines that the operation history index is equal to or less than “0”, the active spot index is decreased by “1”, and the operation history storage number in the active spot related to the active spot index after “1” is decreased. The operation history index is set (step S35). Here, the case where the operation history index is “0” or less refers to a case where the display of the map related to all the operation history data in a predetermined active spot is completed. For example, the operation history index is displayed on the currently displayed map. When the active spot is the active spot (3), this corresponds to the case where all the maps related to the operation history data (7) to the operation history data (1) in the active spot (3) are displayed. In this case, the CPU 12 decrements the active spot index by “1” and sets the operation history storage number in the active spot related to the active spot index after decrementing “1” as the operation history index, The map related to the operation history index (6) in 2) will be displayed next.

  Next, the CPU 12 determines whether or not the active spot index is “0” or less (step S36). If it is determined that the active spot index is not “0” or less, the operations from step S31 to step S35 are performed. Repeat (Step S36: No). On the other hand, if the CPU 12 determines that the active spot index is equal to or less than “0”, all the maps related to the operation history data in all the active spots displayed in the list are displayed, and thus the process ends ( Step S36: Yes). As can be seen from the above, in the map display process of FIG. 13, the map related to the operation history data in the active spot is displayed in the order shown by the arrows in FIG.

  Next, when the map display device 100 displays a map related to a predetermined active spot and then proceeds from the predetermined active spot, that is, displays a map related to an active spot chronologically newer than the predetermined active spot. Describe the case. FIG. 15 is a flowchart showing map display processing at this time. FIG. 16A shows an example of a menu bar 32a displayed on the display screen at this time, and FIG. 16B shows an example of a data string of active spots.

  It is assumed that the active spot data string in the map display process of FIG. 15 includes active spots (1) to (6). Hereinafter, the flowchart of the map display process of FIG. 15 will be described.

  The user displays a list of active spots by clicking the pull-down menu 35ab with the mouse. At this time, the CPU 12 creates a list of active spots to be displayed on the pull-down menu 35ab based on the active spots related to the currently displayed map. Specifically, assuming that the active spot relating to the currently displayed map is the active spot (4), the CPU 12 has an active spot that is newer than the active spot, that is, the active spot, as shown in FIG. (5) to the active spot (6) are created as a list in which the oldest ones are arranged in chronological order (step S41).

  The CPU 12 refers to the number of active spots in which the active spot index is stored in the active spot data example (hereinafter referred to as “stored number”. For example, the active spot data string in the map display processing of FIG. (1) to active spot (6), so it is determined whether or not the number of storages is “6”) (step S42), and the active spot index is greater than or equal to the number of storages. If there is, the process is terminated (step S42: No). For example, when the active spot index is “7”, there is no corresponding active spot. In this case, the CPU 12 ends the process. On the other hand, when the CPU 12 determines that the active spot index is smaller than the stored number (step S42: Yes), the process proceeds to the next step S43.

  Next, the user selects an arbitrary active spot by clicking on the pull-down menu 35ab, or selects an active spot recorded one time later in time by clicking the forward button 34a (step S43). When the CPU 12 detects that the active spot is selected by the user, the CPU 12 moves the map to the coordinate position of the selected active spot. In other words, the CPU 12 obtains a map relating to the active spot selected by the user from the database 18 and then displays it on the display screen (step S44).

  Next, the CPU 12 increases the active spot index by the amount of movement. Specifically, when the user clicks on the pull-down menu 35ab and selects any active spot, the CPU 12 determines that the active spot related to the map displayed before the movement and the active spot related to the destination map are displayed. Increase the active spot index by the number of active spots in between. On the other hand, when the user clicks the forward button 34a and selects the active spot recorded one time later in time series, the CPU 12 increases the active spot index by one. Further, after setting 1 as the operation history index (step S45), the CPU 12 ends the process.

  Next, when the map display device 100 displays a map related to the destination active spot and then proceeds to display the operation history in the destination active spot, that is, in time series in the destination active spot. The case where the map concerning new operation history data is continuously displayed is described. FIG. 17 is a flowchart showing the map display processing at this time, and FIG. 18 shows an example of an operation history data string in the active spot.

  Here, it is assumed that the active spot relating to the currently displayed map is the active spot (4). As shown in FIG. 18, the active spot (4) includes operation history data (1) to operation history data (7), and the active spot (5) includes operation history data (1) to operation history data (6). ) And the active spot (6) has operation history data (1) to operation history data (8). Hereinafter, the flowchart of the map display process of FIG. 17 will be described.

  As described in the description of the flowchart of FIG. 17, since “1” is set in the operation history index in the active spot of the movement destination, the active spot related to the currently displayed map is the active spot (4 ), The currently displayed map is a map related to the operation history data (1) in the active spot (4).

  At this time, when the user wants to display the operation history in advance, the user long presses the advance button 34a (step S51). When the CPU 12 detects that the forward button 34a is pressed for a long time, the operation history data in the active spot (4), which is one time later, that is, newer in time series than the operation history data (1). A map related to the operation history data (2) is displayed (step S52). Thereafter, the CPU 12 increases the operation history index by “1” (step 53).

  Next, the CPU 12 determines whether or not the operation history index is larger than the operation history storage number (step S54). When the CPU 12 determines that the operation history index is not larger than the operation history storage number (step S54: No), the CPU 12 proceeds to the process of step S56. On the other hand, if the CPU 12 determines that the operation history index is larger than the operation history storage number, the CPU 12 increases the active spot index by “1” and sets “1” as the operation history index (step S55). Here, the case where the operation history index is larger than the operation history storage number means that the display of the map related to all operation history data in a predetermined active spot is completed, for example, currently displayed When the active spot related to the map becomes the active spot (4), it corresponds to the case where all the maps related to the operation history data (1) to the operation history data (7) in the active spot (4) are displayed. . In this case, the CPU 12 increases the active spot index by “1” and sets “1” as the operation history index, so that the map related to the operation history index (1) in the active spot (5) is displayed next. The Rukoto.

  Next, the CPU 12 determines whether or not the active spot index is larger than the stored number (step S56). If it is determined that the active spot index is not larger than the stored number, the operation from step S51 to step S55 is performed. Repeat (Step S56: No). On the other hand, if the CPU 12 determines that the active spot index is larger than the stored number, it means that all the maps related to the operation history data in all the active spots displayed in the list are displayed, and thus the process ends ( Step S56: Yes). As can be seen from the above, in the map display process of FIG. 17, the map related to the operation history data in the active spot is displayed in the order shown by the arrows in FIG.

  The user presses and holds down the back button 33a or the forward button 34b when displaying the map related to the operation history data. This is because when the user clicks the back button 33a or the forward button 34b, This is because the active spot will move. Therefore, instead of pressing the back button 33a or the forward button 34a for a long time, a new button is provided in addition to the back button 33a or the forward button 34a, and the map relating to the operation history data is displayed by clicking the button. It goes without saying.

  As can be seen from the above, in the map display device according to the application example, the CPU 12 records the history of the active spots in the memory 13 in a time series, so that the user can see the map of the active spots and the active spots. It is possible to easily redisplay the map related to the operation history data.

  As described above, in the present invention, the map display device stores a plurality of map data in which a plurality of maps are converted into electronic data, and a history of a display mode of the map displayed on the display screen in a time-series manner at predetermined time intervals. A map history recording unit for recording in the unit, a map history acquisition unit for acquiring a history corresponding to the redisplay request from the storage unit in response to a user's redisplay request, and a history corresponding to the redisplay request. And map redisplay means for displaying a map corresponding to the redisplay request after acquiring map data of the map corresponding to the redisplay request from the plurality of map data. Thereby, the user can easily re-display the previously displayed map.

It is a block diagram which shows the whole structure of the map display apparatus which concerns on a present Example. A wide area map showing how the displayed range of the scrolled map moves. A wide area map showing how the displayed range of the scrolled map moves. It is a table which shows the example of the positional information recorded on memory. It is a figure which shows an example of the display mode of the map redisplayed on a display. A wide area map showing how the displayed range of the scrolled map moves. It is a table which shows the example of the positional information recorded on memory. It is a flowchart which shows the map display process which concerns on a present Example. It is a schematic diagram which shows the structure of the data sequence of an active spot. It is a schematic diagram which shows the structure of the data sequence of an active spot. It is a flowchart which shows the map display process which concerns on an application example. It is a figure which shows an example of the data string of a menu bar and an active spot. It is a flowchart which shows the map display process which concerns on an application example. It is a figure which shows an example of the operation history data sequence in an active spot. It is a flowchart which shows the map display process which concerns on an application example. It is a figure which shows an example of the data row | line | column of an active spot. It is a flowchart which shows the map display process which concerns on an application example. It is a figure which shows an example of the operation history data sequence in an active spot.

Explanation of symbols

11 ... System bus 12 ... CPU
13 ... Memory 16 ... Display 18 ... Database

Claims (7)

Map data acquisition means for acquiring the map data from a map data storage unit in which map data in which a plurality of scale maps are converted into electronic data is recorded;
The history of the active spot, which is position information of the display range of the map searched or registered by the user, is recorded in the recording unit in time series, and the map is displayed after the map related to the active spot is displayed on the display screen. Among the position information of the range, the scale of the display range, or the orientation of the display range, at least as a history of the display mode of the position information of the display range, the history of a plurality of display modes by scroll operation is associated with the history of the active spot Map history recording means for recording in the recording unit in time series;
In response to a user's redisplay request, map history acquisition means for acquiring from the recording unit a history of the active spot corresponding to the redisplay request and a display mode corresponding to the active spot;
Based on the active spot corresponding to the redisplay request and the history of the display mode corresponding to the active spot, the map data acquisition means acquires map data of the map corresponding to the redisplay request, and then redisplays the map. A map redisplay means for displaying a map corresponding to the request on the display screen ,
The map history recording means is included in the history of the display mode already recorded corresponding to the active spot from the state where the map related to the active spot corresponding to the re-display request is displayed on the display screen. When the history of the display mode for the map in the new scroll direction is recorded in the recording unit by scrolling in a direction different from the scroll direction indicated by the position information of the displayed display range , the scrolling in the different direction is performed. The history of the display mode corresponding to the active spot recorded in time series after the history of the display mode of the map displayed on the display screen at the start is deleted, and at the start of scrolling in the different direction the activator recorded prior in time sequence than the history of the display mode of the map which has been displayed on the display screen Map display apparatus characterized by leaving that records the history of the display mode corresponding to the spot. The map history recording means records the history of the display mode of the map displayed on the display screen every predetermined time in the recording unit ,
The map display device according to claim 1, wherein the predetermined time can be set in advance by the user. The map history recording means does not store the history of the display mode of the map displayed on the display screen in the recording unit when there is no change in the display mode of the map displayed on the display screen. The map display device according to claim 2. The map history recording means, when the maximum number of the history of the display mode that can be recorded in the recording unit is exceeded, the most time series among the history of the display mode recorded in the recording unit The map display device according to any one of claims 1 to 3, wherein the history of the display mode that is old is deleted.   2. A map continuous redisplay unit for redisplaying a map corresponding to the redisplay request continuously in time series by repeatedly using the map history acquisition unit and the map redisplay unit. The map display apparatus as described in any one of thru | or 4. A map display method for displaying a previously displayed map using map data executed by a computer and converted into electronic data from a plurality of scale maps and stored in a map data storage unit ,
The history of the active spot, which is position information of the display range of the map searched or registered by the user, is recorded in the recording unit in time series, and the map is displayed after the map related to the active spot is displayed on the display screen. Among the position information of the range, the scale of the display range, or the orientation of the display range, at least as a history of the display mode of the position information of the display range, the history of a plurality of display modes by scroll operation is associated with the history of the active spot A map history recording step for recording in the recording unit in time series;
In response to a user's redisplay request, a map history acquisition step of acquiring from the recording unit a history of the active spot corresponding to the redisplay request and a display mode corresponding to the active spot;
After acquiring the map data of the map corresponding to the redisplay request from the map data storage unit based on the history of the active spot corresponding to the redisplay request and the display mode corresponding to the active spot, the redisplay A map redisplay process for displaying a map corresponding to the request on the display screen ,
The map history recording step is included in the history of the display mode already recorded corresponding to the active spot from the state where the map related to the active spot corresponding to the re-display request is displayed on the display screen. When the history of the display mode for the map in the new scroll direction is recorded in the recording unit by scrolling in a direction different from the scroll direction indicated by the position information of the displayed display range , the scrolling in the different direction is performed. The history of the display mode corresponding to the active spot recorded in time series after the history of the display mode of the map displayed on the display screen at the start is deleted, and at the start of scrolling in the different direction the activator recorded prior in time sequence than the history of the display mode of the map which has been displayed on the display screen Map display method characterized by leaving that records the history of the display mode corresponding to the spot. A program that is executed by a computer and displays a previously displayed map using map data that is converted into electronic data and stored in a map data storage unit .
The history of the active spot, which is position information of the display range of the map searched or registered by the user, is recorded in the recording unit in time series, and the map is displayed after the map related to the active spot is displayed on the display screen. Among the position information of the range, the scale of the display range, or the orientation of the display range, at least as a history of the display mode of the position information of the display range, the history of a plurality of display modes by scroll operation is associated with the history of the active spot Map history recording means for recording in the recording unit in time series,
Map history acquisition means for acquiring, from the recording unit, the history of the active spot corresponding to the re-display request and the display mode corresponding to the active spot in response to a user's re-display request;
After acquiring the map data of the map corresponding to the redisplay request from the map data storage unit based on the history of the active spot corresponding to the redisplay request and the display mode corresponding to the active spot, the redisplay Causing the computer to function as a map redisplay means for displaying a map corresponding to the request on the display screen ;
The map history recording means is included in the history of the display mode already recorded corresponding to the active spot from the state where the map related to the active spot corresponding to the re-display request is displayed on the display screen. When the history of the display mode for the map in the new scroll direction is recorded in the recording unit by scrolling in a direction different from the scroll direction indicated by the position information of the displayed display range , the scrolling in the different direction is performed. The history of the display mode corresponding to the active spot recorded in time series after the history of the display mode of the map displayed on the display screen at the start is deleted, and at the start of scrolling in the different direction the activator recorded prior in time sequence than the history of the display mode of the map which has been displayed on the display screen Map display program, characterized in that leave it records a history of the display mode corresponding to the spot.

Images