JP2009300328A - Map displaying device and map displaying program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To perform scroll-displaying with zooming while changing a contraction scale so as to allow a user to readily grasp a positional relationship between a present position and a preset position. <P>SOLUTION: When a user sets a destination on a map (S101), a distance from a present position to the destination is calculated out (S102). A maximum wide area contraction scale (a MAX contraction scale) of the map in a scrolling process with zooming is determined in accordance with the calculated distance (S103 to S105). The scrolling process with zooming in which the map from the present position to the destination is scrollably displayed and the contraction scale of the map is changed within the upper limit of the MAX contraction scale, is performed (S106 to S114). Therefore, in the scrolling process with zooming, the contraction scale of the map is changed to an adequate contraction scale corresponding to the distance from the present position to the destination. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a map display device.

  Conventionally, in a map display device such as a car navigation device, when an arbitrary point on a map is set by a selection operation from a registered point or a telephone number input operation, a map near the set point is displayed. Is common. However, such a display method has a problem that it is difficult to grasp the positional relationship (direction, sense of distance, etc.) between the current location and the set point.

To solve this problem, when the destination is set by the car navigation system, the display is scrolled with zoom from the currently displayed area to the vicinity of the destination instead of switching to the map near the destination. A method has been proposed (see Patent Document 1).
JP 2007-286593 A

  In order to make it easier to grasp the positional relationship between the current location and the set point such as the destination in the scroll display with zoom, it is necessary to change the scale of the map to an appropriate scale. For example, the set point is within the same prefecture as the current location. The appropriate scale for making it easier to grasp the positional relationship is different between the case where the user is in the city and the case where the set point is in a different prefecture far from the current location. Therefore, if the scale of the map is simply changed under uniform conditions, the scale may be too wide or too detailed, and the intended effect may not be obtained sufficiently.

  The present invention has been made in view of these problems, and an object of the present invention is to perform scrolling display with zoom by changing the scale of a map so that the positional relationship between the current location and a set point can be easily understood.

  In the map display device according to claim 1 of the present invention made to achieve the above object, the point setting means sets an arbitrary point on the map. Here, the setting of an arbitrary point can be performed by receiving a point setting operation by the user, for example.

  Then, the map display means performs a scrolling process with zoom for changing the scale of the map while scrolling the map from the current location to the set point set by the point setting means. In particular, since the map display means changes the scale of the map under different conditions according to the positional relationship between the current location and the set location in the scrolling process with zoom, the positional relationship between the current location and the set location is grasped. It is possible to change the scale of the map for easy scrolling with zoom.

  That is, the map display is easier to understand in that the display information such as the place name is enriched as the detailed display is performed, but the positional relationship is difficult to grasp as the scroll amount from the current position to the set point increases. On the contrary, the scroll amount from the current location to the set point becomes smaller as the wide area display is performed, so that it becomes easier to grasp the positional relationship, but it is difficult to understand in terms of lack of display information such as place names.

  For this reason, it is effective to appropriately change the scale of the map in the process of scrolling the map from the current location to the set point. However, if the scale of the map is changed under uniform conditions regardless of the positional relationship between the current location and the set point, the target effect can be obtained sufficiently because the scale is too wide or too detailed. It is possible that there is not.

  Therefore, in the map display device of the present invention, the scale of the map is appropriately changed according to the positional relationship between the current location and the set point by changing the scale of the map under different conditions according to the positional relationship between the current location and the set point. It is possible to change.

  Specifically, for example, in the map display device according to claim 2, the distance calculation unit calculates the distance from the current location to the set point, and the scale determination unit determines whether the distance calculation unit calculates the distance. Determine the maximum scale of the map in the scroll process with zoom. Then, the map display means changes the scale of the map with the maximum wide area scale determined by the scale determination means as an upper limit in the scrolling process with zoom.

  According to such a map display device, the scale of the map can be changed to an appropriate scale according to the distance from the current location to the set point in the scrolling process with zoom. Here, as a pattern for changing the scale of the map, for example, ones as described in claim 3 and claim 4 are conceivable.

  That is, in the map display device according to claim 3, in the process of scrolling the map from the current location to the set point, the map display means changes the map scale to the wide area side until the maximum wide area scale is reached, and sets the maximum wide area scale. The scale of the map is fixed when it reaches, and when the map is scrolled, the scale of the map is changed to the detailed side.

  According to such a map display device, since the map scale is fixed when the maximum wide-area scale is reached, it is easy to grasp the positional relationship (direction, sense of distance, etc.) between the current location and the set point. be able to.

  On the other hand, in the map display device according to claim 4, in the process of scrolling the map from the current location to the set point, the map display means changes the scale of the map to the wide area side until the maximum wide area scale is reached. When it reaches, change the scale of the map to the detailed side.

According to such a map display device, since the scale changes to the detailed side as the set point is approached, it is possible to easily grasp information (such as a place name) near the destination.
In particular, when changing the scale of the map with such a pattern, as shown in claim 5, for example, the timing when the map display means reaches the specified scale by changing the scale of the map to the detailed side. It is better to change the scale of the map so that the map finishes scrolling. In this way, the distance to the set point can be grasped sensuously by the change in scale.

  In the map display device according to claim 6, the map display means maps the map at a constant rate with respect to the scroll time (time during which scroll display is continued) in the process of scrolling the map from the current location to the set point. Change the scale of.

According to such a map display device, it is possible to make the map easier to see than when the ratio of changing the scale with respect to the scroll time is not constant.
Further, in the map display device according to claim 7, the map display means is constant with respect to a scroll distance (a distance on the map advanced by continuing the scroll display) in the process of scrolling the map from the current location to the set point. Change the scale of the map in proportion.

According to such a map display device, the movement distance on the map accompanying scroll display can be easily grasped by a change in scale.
In the map display device according to claim 8, the map display means has changed the scale of the map so that the current location is always displayed in the process of scrolling the map from the current location to the set point, and has finished scrolling the map. At this point, change the scale of the map to the detailed side.

According to such a map display device, it is possible to make it easier to grasp the position based on the current location as compared to the case where the current location is not displayed with scrolling.
In the map display device according to claim 9, the map display means performs scroll display so that the time required for scrolling the map from the current location to the set point is constant.

  According to such a map display device, the time required for scrolling can be made constant regardless of the distance from the current location to the set point. As a result, it is possible to prevent the time required for scroll display from becoming excessively long due to the long distance from the current location to the set point.

  In the map display device according to claim 10, the map display means performs scroll display at a constant speed in the process of scrolling the map from the current location to the set point. The scroll display speed is merely the scroll speed of the image on the screen, and is not related to the distance (scale) on the map.

According to such a map display device, since the scroll display is performed at a constant speed, it is possible to make the map easier to see than when the speed changes.
Next, a map display program according to an eleventh aspect includes a point setting unit for setting an arbitrary point on the map, and a map scale while scrolling and displaying the map from the current location to the set point set by the point setting unit. A map display program for causing a computer to function as a map display means for performing a scrolling process with zoom, wherein the map display means performs different conditions depending on the positional relationship between the current location and the set point in the scrolling process with zoom. Change the scale of the map.

  According to such a map display program, it is possible to cause the computer to function as the map display device according to the first aspect, thereby obtaining the effects described above.

Embodiments to which the present invention is applied will be described below with reference to the drawings.
[First Embodiment]
FIG. 1 is a block diagram illustrating a schematic configuration of the navigation device according to the first embodiment.

  This navigation device is used by being mounted on a vehicle, and includes a position detector 11, a map data input device 15, an operation device 16, an external memory 17, a display device 18, an audio output device 19, a control circuit 20, and the like. ing.

  The control circuit 20 is configured as a normal computer, and includes a well-known CPU, ROM, RAM, I / O, and a bus line for connecting these configurations. Then, the CPU performs predetermined processing (a destination display described later) based on various information input from the position detector 11, the map data input device 15, the operation device 16, and the external memory 17 in accordance with a program stored in the ROM. Process).

  The position detector 11 is for detecting the present location of a vehicle on which the navigation device is mounted, and each has a known gyroscope 12, a distance sensor 13, and a GPS (Global Positioning System) receiver 14. . Since these have errors of different properties, they are configured to be used while complementing each other. Depending on the accuracy, a part of the above may be used, and a steering angle sensor, a wheel speed sensor of each rolling wheel, or the like may be used.

  The map data input unit 15 is loaded with a storage medium (not shown) and inputs various data including map matching data, map data, and landmark data for improving the accuracy of position detection stored in the storage medium. It is a device for doing. As a storage medium, a DVD-ROM or a hard disk device (HDD) is generally used because of the amount of data, but a memory card or the like may be used.

  The operation device 16 is used for inputting various instructions (instructions for various settings and functions) from the user. The operation device 16 is a touch panel arranged on the front surface of the display device 18 or a steering provided near the steering. A switch or the like is used, and it is possible to perform all operations of the navigation device, such as changing the scale of the map, scrolling, and setting the destination.

  The external memory 17 is a writable large-capacity external storage device such as a hard disk device. The external memory 17 stores a large amount of data and data that should not be erased even when the power is turned off, and frequently used data is copied from the map data input device 15 and used. .

  The display device 18 is capable of full-color display. On the screen of the display device 18, the vehicle current location mark indicating the current location of the vehicle detected by the position detector 11 and the map data input from the map data input device 15 are displayed. And additional data such as a guidance route to be displayed on the map can be displayed in an overlapping manner.

  The audio output device 19 includes a speaker, an audio amplifier, and the like, and outputs data stored in the external memory 17, audio synthesized by the control circuit 20, and the like. The audio output device 19 can be omitted as a configuration of the navigation device. In that case, you may utilize the audio | voice output apparatus (For example, the audio | voice output apparatus of a vehicle main body) with which the other apparatus is provided.

Next, processing executed by the navigation device of this embodiment will be described.
When the destination is set by the user, the navigation device of the present embodiment performs a scrolling process with zoom that changes the scale of the map while scrolling the map from the current position to the destination.

  Here, specific processing contents executed by the control circuit 20 to realize such processing will be described. FIG. 2 is a flowchart of the destination display process executed by the control circuit 20. This destination display process is started when an operation for selecting a destination setting menu is performed by the user via the operation device 16.

  When starting the destination display process, the control circuit 20 first performs a destination selection process in S101. Specifically, the destination setting screen is displayed on the display device 18 and the user performs an operation of selecting a destination via the operation device 16. As the destination setting screen, for example, as shown in FIG. 3, a screen displaying a list of a plurality of candidates can be cited.

  When a destination is selected in the destination selection process of S101, the process proceeds to S102, and a distance d [km] (linear distance in the present embodiment) from the current location to the selected destination is calculated. Then, based on the calculated distance d, a maximum scale value (hereinafter referred to as “MAX scale”) that can be zoomed out during scroll display is determined (S103 to S105).

Specifically, when the distance d is equal to or less than the preset determination value X [km], the process proceeds to S103, and after determining the MAX scale to the value A, the process proceeds to S106.
When the distance d is larger than the determination value X [km] and smaller than the predetermined determination value Y [km] (Y> X), the process proceeds to S104 and the MAX scale is set to the value B (value Then, the process proceeds to S106.

On the other hand, when the distance d is equal to or greater than the determination value Y [km], the process proceeds to S105, and the MAX scale is determined to be a value C (a scale wider than the value B), and then the process proceeds to S106.
That is, the value of the MAX scale is determined as A when d ≦ X, B when X <d <Y, and C when Y ≦ d (A <B <C).

  When the value of the MAX scale is determined in this way, scrolling from the current location to the destination is started for the map displayed on the display device 18 in S106. Specifically, first, a map centered on the current location is displayed at a specified scale (default value), and scrolling from this state to the destination is started. Note that the specified scale for displaying the current location is not limited to the default value, and may be set by the user, for example. Further, for example, the scale used by the user for displaying the current location during normal use may be automatically stored as a specified scale.

  Here, the scrolling of the map is performed at a constant speed (not the speed on the map but the speed of the image on the display screen) from the current position to the destination. In addition, the scrolling speed is determined so that the time required for scrolling the map from the current location to the destination is constant (for example, a preset time such as 30 seconds). Therefore, the longer the distance from the current location to the destination, the faster the scrolling speed is set. In the present embodiment, the map orientation is set as heading-up display. However, when the direction of east, west, south, and north is easier to understand, north-up display may be used.

When scrolling is started in this manner, zoom-out of the map is started in S107. As a result, the map is zoomed out while scrolling.
In S108, it is determined whether or not the scale of the map has reached the MAX scale (value set in S103 to S105) by the zoom-out started in S107 described above, and it is determined that the map has reached the MAX scale. The process proceeds to S109. That is, scrolling and zooming out are continued until the MAX scale is reached.

  Specifically, as shown in FIG. 4, the zoom-out is performed at a constant rate so that the MAX scale is reached when a preset scroll time t is reached. That is, zoom out is performed with a scale change proportional to time. However, the time t ′ required for scrolling from the current location to the destination, such as when the distance d from the current location to the destination is short, or when the scale at the start of scrolling (the above-mentioned specified scale) is large on the wide area side, etc. Is shorter than the preset scroll time t, zooming out is performed at a constant rate so as to reach the MAX scale at the time t ′.

  When the map scale reaches the MAX scale, in S109, the zoom-out started in S107 is stopped. At this time, scrolling does not stop. That is, scrolling is continued in a state where the scale is fixed. As described above, when the time t ′ required for scrolling from the current position to the destination is shorter than the scroll time t set in advance, it is constant so as to reach the MAX scale at the time t ′. Since the zoom-out is performed at the rate of, the maximum scale is reached and the destination is reached at the same time. As a result of the processing of S110 and S111 described later, scrolling is immediately stopped.

  Subsequently, in S110, it is determined whether or not the destination has been reached (the map is centered on the destination) by the scrolling started in S106 described above, and if it is determined that the destination has been reached, S111 Migrate to That is, the scrolling at the MAX scale is continued until the destination is reached.

When arriving at the destination, in S111, the scrolling started in S106 is stopped. In this state, a map centered on the destination is displayed at the MAX scale.
Subsequently, in S112, zoom-in of the map is started.

  Subsequently, in S113, it is determined whether or not the scale of the map has reached the specified scale by the zoom-in started in S112. If it is determined that the map has reached the specified scale, the process proceeds to S114.

In S114, the zoom-in started in S112 is stopped. Thereby, the map centering on the destination is displayed at a specified scale. Thereafter, the destination display process is terminated.
As described above, in the navigation device according to the first embodiment, when the destination on the map is set by the user (S101), the zoom is attached to change the scale of the map while scrolling the map from the current location to the destination. Scroll processing is performed (S106 to S114). In particular, since the scale of the map is changed under different conditions depending on the positional relationship between the current location and the set point (S102 to S105), the scale of the map is easy to grasp the positional relationship between the current location and the set point. Scrolling with zoom can be performed by changing.

  That is, in this navigation device, the distance from the current location to the destination is calculated (S102), and the maximum wide-area scale (MAX scale) of the map in the scrolling process with zoom is determined according to the calculated distance (S103 to S105). The map scale is changed with the MAX scale as the upper limit. Specifically, in the process of scrolling the map from the current location to the destination, the map scale is changed to the wide area until the MAX scale is reached, and when the MAX scale is reached, the map scale is fixed and the map is scrolled. When finished, change the scale of the map to the detailed side.

  For this reason, in the scroll process with zoom, the scale of the map can be changed to an appropriate scale corresponding to the distance from the current location to the destination. In particular, since the map scale is fixed when the maximum scale is reached, the positional relationship (direction, distance, etc.) between the current location and the destination can be easily grasped.

  In addition, in this navigation device, the scale of the map is changed at a constant rate with respect to the scroll time (time during which scroll display is continued) in the process of scrolling the map from the current location to the destination ( FIG. 4) makes it easier to see the map than when the ratio of changing the scale with respect to the scroll time is not constant.

  Furthermore, in this navigation device, since the scroll display is performed so that the time required for scrolling the map from the current location to the destination is constant, the time required for the scrolling regardless of the distance from the current location to the destination. Can be made constant. As a result, it is possible to prevent the time required for scroll display from becoming excessively long due to the long distance from the current location to the destination.

In addition, in this navigation device, since the scroll display is performed at a constant speed, the map can be viewed more easily than when the speed changes.
In the navigation device of the first embodiment, the control circuit 20 that executes the process of S101 corresponds to the point setting unit of the present invention, and the control circuit 20 that executes the process of S102 corresponds to the distance calculation unit of the present invention. The control circuit 20 that executes the processes of S103 to S105 corresponds to the scale determining means of the present invention, and the control circuit 20 that executes the processes of S106 to S114 corresponds to the map display means of the present invention.

[Second Embodiment]
Next, a navigation device according to a second embodiment will be described.
The navigation device of the second embodiment has the same basic configuration as the navigation device (FIG. 1) of the first embodiment, but differs only in the pattern for changing the scale of the map in the scroll process with zoom. Specifically, the control circuit 20 executes the destination display process shown in FIG. 5 instead of the destination display process (FIG. 2) of the first embodiment described above.

  Here, the destination display process (FIG. 5) of 2nd Embodiment is demonstrated. In addition, since the destination display process of 2nd Embodiment is the same as the process of S101-S107 compared with the destination display process (FIG. 2) of 1st Embodiment, the description is abbreviate | omitted. To do.

  In S208, it is determined whether t / 2 time has elapsed since the start of scrolling in S206. If it is determined that t / 2 time has elapsed, the process proceeds to S209. That is, in the second embodiment, as shown in FIG. 6, the scale is constant so as to reach the MAX scale when half the time t (t / 2) required for scrolling the map from the current location to the destination has elapsed. Zoom out at a rate, and then zoom in at a constant rate so as to reach a specified scale when time t has passed. Therefore, in S208, it is determined whether or not a half time (t / 2) of the time t required for scrolling the map from the current location to the destination has elapsed.

  When t / 2 time has elapsed since the scrolling started (the scale of the map reaches the MAX scale), the zoom-out started in S207 is stopped in S209. At this time, scrolling is continued without stopping.

Subsequently, in S210, zoom-in of the map is started.
Subsequently, in S211, it is determined whether or not the destination has been reached (the map is centered on the destination) by the scrolling started in S206 described above, and if it is determined that the destination has been reached, S212 Migrate to That is, scrolling and zoom-in are continued until the destination is reached.

When the vehicle arrives at the destination (the scale of the map reaches a specified scale), the scrolling started in S206 is stopped in S212.
Subsequently, in S213, the zoom-in started in S210 is stopped. Thereby, the map centering on the destination is displayed at a specified scale. Thereafter, the destination display process is terminated.

  As described above, according to the navigation device of the second embodiment, the same effects as those of the navigation device of the first embodiment described above can be obtained. In particular, in the navigation device of the second embodiment, in the process of scrolling the map from the current location to the destination, the scale of the map is changed to the wide area side until the MAX scale is reached, and the map scale is detailed when the scale is reached. Since the scale is changed to the specified scale to the side, the scale changes to the detailed side as the destination is approached, and information (such as place names) near the destination can be easily grasped. Moreover, by changing the map scale to the detailed side, the map scale is changed so that the map finishes scrolling when the specified scale is reached, so the distance to the destination can be grasped sensuously by the change in scale. Can be made.

  In the navigation device of the second embodiment, the control circuit 20 that executes the process of S201 corresponds to the spot setting unit of the present invention, and the control circuit 20 that executes the process of S202 corresponds to the distance calculation unit of the present invention. The control circuit 20 that executes the processes of S203 to S205 corresponds to the scale determining means of the present invention, and the control circuit 20 that executes the processes of S206 to S213 corresponds to the map display means of the present invention.

[Modification]
As mentioned above, although embodiment of this invention was described, it cannot be overemphasized that this invention can take a various form, without being limited to the said embodiment.

  For example, in the navigation device of each of the above embodiments, the MAX scale is selected from three values according to the distance d from the current location to the destination. However, the present invention is not limited to this. You may make it select from four or more values, and you may make it calculate a MAX scale using the calculation formula which uses the distance d as a parameter.

  In the navigation device of each of the above embodiments, the distance d from the current location to the destination is calculated as a straight-line distance, but the present invention is not limited to this, and the road along the searched route from the current location to the destination is not limited to this. The distance may be calculated. In this case, scrolling may also be executed along the road (similar to the case where the vehicle actually travels).

  Further, in the navigation device of each of the embodiments described above, the scale of the map is changed at a constant rate with respect to the scroll time in the process of scrolling the map from the current location to the destination (FIGS. 4 and 6). However, the present invention is not limited to this, and for example, the scale of the map may be changed at a constant rate with respect to the scroll distance (the distance on the map that has been advanced by continuing the scroll display).

  Specifically, instead of FIG. 4 shown in the first embodiment, for example, as shown in FIG. 7, the distance is adjusted so that the MAX scale is reached when the scroll distance reaches a preset distance a. Zoom out at a constant rate. That is, zooming out is performed with a scale change proportional to the distance. However, if the distance b from the current location to the destination is shorter than the preset distance a, the zoom-out is performed at a constant rate with respect to the distance so that the MAX scale is reached when the distance b is reached. Do.

  Similarly, instead of FIG. 6 shown in the second embodiment, for example, as shown in FIG. 8, when the scroll distance reaches a distance (d / 2) that is half the distance d from the current location to the destination. Zoom out at a constant rate with respect to the distance to reach the MAX scale, and then zoom in at a constant rate with respect to the distance so that the specified scale is reached when the scroll distance reaches the distance d. Do.

In this way, if the scale of the map is changed at a constant rate with respect to the scroll distance, the movement distance on the map accompanying the scroll display can be easily understood.
Further, the present invention is not limited to changing the scale of the map at a certain rate. For example, in the process of scrolling the map from the current location to the destination, the current location is always displayed on the screen (for example, the current location is It is also possible to change the scale of the map so that it is as detailed as possible on the condition that it is displayed on the screen, and to change the scale of the map to the detailed side when the map has been scrolled. In this way, it is possible to make it easier to grasp the position based on the current location as compared to the case where the current location is not displayed on the screen due to scrolling. In this case as well, as in the first embodiment, the user scrolls while zooming out while the current location is visible on the screen, and starts zooming in when the destination comes to the center of the screen. As in the form, scroll while zooming out while the current location is visible on the screen, and when the destination is displayed on the screen, start zooming in while scrolling so that the destination is in the center of the screen Also good.

  On the other hand, in the navigation device of each of the above embodiments, the destination is exemplified as an arbitrary point in the present invention. However, the present invention is not limited to this, and the present invention can be applied to a point other than the destination. Can do.

It is a block diagram showing the schematic structure of the navigation apparatus of 1st Embodiment. It is a flowchart of the destination display process of 1st Embodiment. It is explanatory drawing of the destination setting screen. It is explanatory drawing which shows the relationship between the scroll time of 1st Embodiment, and a reduced scale. It is a flowchart of the destination display process of 2nd Embodiment. It is explanatory drawing which shows the relationship between the scroll time of 2nd Embodiment, and a reduced scale. It is explanatory drawing which shows the relationship between the scroll distance and a reduced scale as a modification of 1st Embodiment. It is explanatory drawing which shows the relationship between the scroll distance and a reduced scale as a modification of 2nd Embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... Position detector, 12 ... Gyroscope, 13 ... Distance sensor, 14 ... GPS receiver, 15 ... Map data input device, 16 ... Operation device, 17 ... External memory, 18 ... Display device, 19 ... Sound output device, 20 ... Control circuit

Claims (11)

A point setting means for setting an arbitrary point on the map;
Map display means for performing scroll processing with zoom for changing the scale of the map while scrolling the map from the current position to the set point set by the point setting means;
With
The map display device characterized in that the map display means changes the scale of the map under different conditions in accordance with the positional relationship between the current location and the set point in the scroll process with zoom. Distance calculating means for calculating the distance from the current location to the set point;
Scale determining means for determining a maximum wide-area scale of the map in the scrolling process with zoom according to the distance calculated by the distance calculating means;
The map display device according to claim 1, wherein the map display means changes the scale of the map with the maximum wide-area scale determined by the scale determination means as an upper limit in the scrolling with zoom. In the process of scrolling the map from the current location to the set point, the map display means changes the map scale to the wide area side until the maximum wide area scale is reached, and the map scale is fixed when the maximum wide area scale is reached. The map display device according to claim 2, wherein the scale of the map is changed to the detailed side when the map is scrolled. In the process of scrolling the map from the current location to the set point, the map display means changes the map scale to the wide area side until reaching the maximum wide area scale, and the map scale is detailed when the maximum wide area scale is reached. The map display device according to claim 2, wherein the map display device is changed to the side. 5. The map according to claim 4, wherein the map display means changes the scale of the map so that the map finishes scrolling at a timing when the scale reaches a specified scale by changing the scale of the map to the detailed side. Display device. The map display means changes the scale of the map at a fixed rate with respect to the scroll time in the process of scrolling the map from the current location to the set point. The map display device according to item 1. The map display means changes the scale of the map at a constant rate with respect to the scroll distance in the process of scrolling the map from the current location to the set point. The map display device according to item 1. The map display means changes the scale of the map so that the current location is always displayed in the process of scrolling the map from the current location to the set point, and changes the scale of the map to the detailed side when the map is scrolled. The map display device according to claim 1, wherein: 9. The map display unit according to claim 1, wherein the map display unit performs scroll display so that a time required for scrolling the map from a current location to the set point is constant. Map display device. The map display according to any one of claims 1 to 9, wherein the map display means performs a scroll display at a constant speed in a process of scrolling the map from the current location to the set point. apparatus. A point setting means for setting an arbitrary point on the map;
A map display program for causing a computer to function as map display means for performing a scrolling process with zoom for changing a scale of a map while scrolling a map from a current position to a set point set by the point setting means,
The map display program characterized in that the map display means changes the scale of the map under different conditions in accordance with the positional relationship between the current location and the set point in the scrolling process with zoom.

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