JP2011080851A - Navigation system and map image display method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To change an operation during a scroll, using a simpler manipulation in a navigation system. <P>SOLUTION: The navigation system is provided with a scroll control means for controlling the scroll of a map image displayed on a display apparatus. The scroll control means accepts instruction for starting the scroll of the map image by a first touch to a touch panel, and accepts an instruction for changing a scroll speed of the map image by a second or later touch to the touch panel. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a navigation device and a map image display method.

  There is a navigation device provided with a touch panel (Patent Document 1, etc.). According to such a navigation device, the user can input an instruction by touching the display with a finger.

  For example, when a map image is displayed on the display, the user can move (scroll) the map image vertically, horizontally, or diagonally by touching the touch panel.

JP2008-89483

  However, in a navigation device equipped with a conventional touch panel, the scrolling speed and the like cannot be changed with a simple operation. For example, a user wants to scroll quickly for a place he does not want to see, and wants to scroll at a slower speed when the place he wants to see approaches. The conventional technology cannot sufficiently meet such user needs.

  In view of the above, an object of the present invention is to enable a navigation device to change a scrolling operation (for example, speed) with a simpler operation.

  In order to solve the above problems, a navigation device according to the present invention is a navigation device including a touch panel capable of recognizing a plurality of touch points, and includes a scroll control unit that controls scrolling of a map image displayed on the display device. The scroll control means accepts an instruction to start scrolling the map image by the first touch on the touch panel, and instructs to change the scroll speed of the map image by the second and subsequent touches on the touch panel. It is characterized by the configuration of accepting.

  Further, the map image display method of the navigation device according to the present invention includes a step of receiving an instruction to start scrolling the map image by a first touch on the touch panel capable of recognizing a plurality of touch points; And a step of receiving an instruction to change the scroll speed of the map image by the second and subsequent touches.

  ADVANTAGE OF THE INVENTION According to this invention, in a navigation apparatus, operation | movement (for example, speed etc.) during scrolling can be changed by simpler operation.

1 is a schematic configuration diagram of an in-vehicle navigation device to which an embodiment of the present invention is applied. It is a figure which shows the function structure of the vehicle-mounted navigation apparatus which concerns on one Embodiment of this invention. It is a flowchart of the scroll process of the vehicle-mounted navigation apparatus which concerns on one Embodiment of this invention. It is the example of a transition of the screen according to the number of touches of the in-vehicle navigation device concerning one embodiment of the present invention. It is the example of a transition of the screen according to the number of touches of the in-vehicle navigation device concerning one embodiment of the present invention. It is the example of a transition of the screen according to the number of touches of the in-vehicle navigation device concerning one embodiment of the present invention.

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

  FIG. 1 is a schematic configuration diagram of an in-vehicle navigation device 100 to which the present invention is applied. As shown in the figure, the in-vehicle navigation device 100 includes an arithmetic processing unit 1, a display 2, a storage device 3, a voice input / output device 4 (a microphone 41 as a voice input device, and a speaker 42 as a voice output device), an input A device 5, a ROM device 6, a vehicle speed sensor 7, a gyro sensor 8, a GPS (Global Positioning System) receiver 9, an FM multiplex broadcast receiver 10, and a beacon receiver 11 are provided.

  The arithmetic processing unit 1 is a central unit that performs various processes. For example, the current location is detected based on information output from the various sensors 7 and 8, the GPS receiver 9, the FM multiplex broadcast receiver 10, or the beacon receiver 11. Further, map data necessary for display is read from the storage device 3 or the ROM device 6 based on the obtained current location information. Further, the read map data is developed in graphics, and a mark indicating the current location is superimposed on the map data and displayed on the display 2. Further, using the map data or the like stored in the storage device 3 or the ROM device 6, an optimum route (recommended route) connecting the starting point (current location) and the destination instructed by the user is searched. Further, the user is guided using the speaker 42 and the display 2.

  The arithmetic processing unit 1 has a configuration in which devices are connected by a bus 25. The arithmetic processing unit 1 includes a CPU (Central Processing Unit) 21 that executes various processes such as numerical calculation and control of each device, and a RAM (Random Access Memory) that stores map data, arithmetic data, and the like read from the storage device 3. ) 22, a ROM (Read Only Memory) 23 for storing programs and data, and an I / F 24 that is an interface for connecting various types of hardware to the arithmetic processing unit 1.

  The display 2 is a unit that displays graphics information generated by the arithmetic processing unit 1. The display 2 is configured by a liquid crystal display, an organic EL display, or the like.

  The storage device 3 is composed of at least a readable / writable storage medium such as an HDD (Hard Disk Drive) or a nonvolatile memory card.

  This storage medium stores, for example, a link table, a traffic information table, route information, section information, and the like which are map data (including link data of links constituting roads on the map) necessary for a normal route search device. (Not shown). For example, the traffic information table is a table that stores traffic information transmitted from an external organization or the like (not shown) via a communication device such as the FM multiplex broadcast receiving device 10 or the beacon receiving device 11. The route information is information related to a route obtained as a result of route search by the navigation device 100 or the like. In addition, the section information is information including, for example, links constituting the section for each section in which one or a plurality of links are connected.

  The voice input / output device 4 includes a microphone 41 as a voice input device and a speaker 42 as a voice output device. The microphone 41 acquires sound outside the in-vehicle navigation device 100 such as a voice uttered by a user or another passenger.

  The speaker 42 outputs a message to the user generated by the arithmetic processing unit 1 as an audio signal. The microphone 41 and the speaker 42 are separately arranged at a predetermined part of the vehicle. However, it may be housed in an integral housing. The vehicle-mounted navigation device 100 can include a plurality of microphones 41 and speakers 42.

  The input device 5 is a device that receives an instruction from the user through an operation by the user. The input device 5 includes a touch panel 51, a dial switch 52, and other hardware switches (not shown) such as scroll keys and scale change keys.

  The touch panel 51 is mounted on the display surface side of the display 2 and can see through the display screen. The touch panel 51 detects a touch with a human finger, for example. The touch position by the user is specified based on, for example, XY coordinates set on the touch panel. In the present embodiment, a touch panel capable of multipoint recognition is used. Even when the touch panel 51 is touched with a plurality of fingers at the same time by multi-point recognition, each touch position can be specified. Such a touch panel 51 is configured by, for example, an input detection element using a capacitance method.

  The dial switch 52 is configured to be rotatable clockwise and counterclockwise, generates a pulse signal for every rotation of a predetermined angle, and outputs the pulse signal to the arithmetic processing unit 1. The arithmetic processing unit 1 obtains the rotation angle from the number of pulse signals.

  The ROM device 6 is composed of at least a readable storage medium such as a ROM (Read Only Memory) such as a CD-ROM or a DVD or an IC (Integrated Circuit) card. In this storage medium, for example, moving image data, audio data, and the like are stored.

  The vehicle speed sensor 7, the gyro sensor 8, and the GPS receiver 9 are used in the in-vehicle navigation device 100 to detect the current location (own vehicle position).

  The vehicle speed sensor 7 is a sensor that outputs a value used to calculate the vehicle speed. The gyro sensor 8 is composed of an optical fiber gyro, a vibration gyro, or the like, and detects an angular velocity due to the rotation of the moving body. The GPS receiver 9 receives a signal from a GPS satellite and measures the distance between the mobile body and the GPS satellite and the rate of change of the distance with respect to three or more satellites to thereby determine the current position, travel speed, and travel of the mobile body The direction is measured and transmitted to the arithmetic processing unit 1.

  The FM multiplex broadcast receiver 10 receives an FM multiplex broadcast signal transmitted from an FM multiplex broadcast station. FM multiplex broadcasting includes VICS (Vehicle Information Communication System: Registered Trademark) information, current traffic information, regulatory information, SA / PA (service area / parking area) information, parking information, weather information, and FM multiplex general information. As text information provided by radio stations.

  The beacon receiving device 11 receives signals such as an optical beacon and a radio beacon. Signals such as a beacon include rough current traffic information of VICS information, regulation information, SA / PA (service area / parking area) information, parking lot information, and the like.

  FIG. 2 is a functional block diagram of the arithmetic processing unit 1.

  As illustrated, the arithmetic processing unit 1 includes a main control unit 101, an input receiving unit 102, an output processing unit 103, and a scroll processing unit 104.

  The main control unit 101 is a central functional unit that performs various processes, and controls other processing units according to the processing content. The main control unit 101 also performs navigation processing (for example, display of traffic information, display of current position, route search, route guidance, etc.), which is a basic operation of the vehicle-mounted navigation device 100.

  The input receiving unit 102 is a functional unit that receives an instruction input from a user via the microphone 41, the touch panel 51, and the dial switch 52, and transfers this to each processing unit.

  The output processing unit 103 is a functional unit that displays the screen output on the display 2. Receives screen data required to be displayed on the display 2 and display candidates, and uses a designated drawing method to display roads, other map components, current location, destination, recommended route, message information dialog, etc. Generate a screen drawing command to draw. Then, the generated command is transmitted to the display 2.

  The scroll processing unit 104 is a functional unit that scrolls (moves) or enlarges the map image displayed on the display. The scroll processing unit 104 executes these processes according to instructions received from the navigation device 100 or the user. For example, in accordance with the number of touches on the touch panel 51 and the user's instruction based on the touch position, the scroll processing unit 104 starts and ends scrolling, scroll operation (scroll direction, scroll speed), and scale rate of the map image. Control changes such as.

  When a plurality of touches are detected, the scroll processing unit 104 distinguishes them as “first touch”, “second touch”, and “third touch”.

  For example, when the scroll processing unit 104 is in a non-touch state (a state where the user's finger is not in contact with the touch panel 51 at all), the first touch state (a state in which a touch on the touch panel 51 is first detected), that is, ON Suppose a state is detected. The scroll processing unit 104 detects such a touch as a “first touch”.

  Note that the scroll processing unit 104 recognizes “first touch” even if the touch position moves as long as the touch ON state continues. That is, even if the touch position moves, if the touch position is obtained as a continuous trajectory, it is considered that the finger has not been released, so the scroll processing unit 104 identifies the moved touch position as “first touch "

  It is assumed that the scroll processing unit 104 detects a touch state at a new position following the “first touch” when the “first touch” is in the ON state. The scroll processing unit 104 detects the touch at the new position as the “second touch”.

  As long as the touch ON state is continued, even if the touch position is moved, the second touch is set. That is, even if the touch position moves, if the touch position is obtained as a continuous trajectory, it is considered that the finger has not been released, so the scroll processing unit 104 displays the moved touch position as “second touch”. "

  It is assumed that the scroll processing unit 104 detects a touch state at a new position following the “second touch” when the “first and second touches” are in the ON state. The scroll processing unit 104 detects the touch at this position as the “third touch”.

  Note that, as long as the touch ON state continues, the “third touch” is set even if the touch position moves. That is, even if the touch position moves, if the touch position is obtained as a continuous trajectory, it is considered that the finger has not been released, so the scroll processing unit 104 displays the moved touch position as “third touch”. "

  In addition, after the finger having performed the “first and third touches” is once released from the touch panel 51 while the “second touch” is continued, a new one other than the “second touch” is added. Assume that the touch state of the position is detected. The scroll processing unit 104 detects such a touch as a “first touch”. In addition, for example, while the “third touch” is continued, after the finger that has performed the “first and second touches” is once released from the touch panel 51, in addition to the “third touch”, Assume that a touch state at a new position is detected. The scroll processing unit 104 detects such a touch as a “first touch”.

  Further, for example, while the “first touch” is continued, after the finger that made the “second and third touches” is once released from the touch panel 51, in addition to the “first touch”, Assume that a touch state at a new position is detected. The scroll processing unit 104 detects such a touch as a “second touch”.

  In addition, for example, after the finger that made the “first and third touches” is once released from the touch panel 51 while the “second touch” is continued, in addition to the “second touch”, Assume that a touch state at a new position is detected. As described above, the scroll processing unit 104 detects such a touch as a “first touch”. Furthermore, it is assumed that the scroll processing unit 104 detects a touch state at a new position following the “first touch” while the “second touch” is continued. The scroll processing unit 104 detects the touch at this position as the “third touch”.

  When the scroll processing unit 104 receives an instruction from the user by “first touch”, the scroll processing unit 104 starts scrolling the map image displayed on the display 2.

  In addition, when the scroll processing unit 104 receives an instruction from the user by “second touch”, the scroll processing unit 104 increases the scroll speed of the map image.

  When the scroll processing unit 104 receives an instruction from the user by “third touch”, the scroll processing unit 104 changes the scale ratio of the map image displayed on the display 2.

  Touch recognition is not limited to touch with a user's finger. For example, the touch ON state may be detected by a touch pen dedicated to the touch panel.

  Each functional unit described above is constructed by executing a predetermined program read by the CPU 21. Therefore, the storage device 3 (memory) stores a program for realizing processing of each functional unit.

  In addition, in order to make an understanding of the structure of the navigation apparatus 100 which concerns on this embodiment easy, each component mentioned above is classified according to the main processing content. Further, the present invention is not limited by the way of classifying the components or their names. The configuration of the navigation device 100 according to the present embodiment can be classified into more components depending on the processing content. Moreover, it can also classify | categorize so that one component may perform more processes.

  Each functional unit may be constructed by hardware (ASIC or the like). Further, the processing of each functional unit may be executed by one hardware or may be executed by a plurality of hardware.

Next, scroll processing executed by the scroll processing unit 104 will be described. FIG. 3 is a flowchart showing the flow of scroll processing. Here, T ₁ , T ₂ , and T ₃ represent “first touch”, “second touch”, and “third touch”, respectively.

  The scroll processing unit 104 starts this flow in the map image display mode (scroll acceptance mode).

  First, the scroll processing unit 104 determines whether or not “first touch” is in an ON state (S101).

  If the “first touch” is not in the ON state (No in S101), the scroll processing unit 104 stops scrolling the map image (S102), returns to S101, and continues the processing. As will be described later, when the map image is displayed in an enlarged manner, the scroll processing unit 104 stops scrolling (S102) and changes the enlarged map image to a standard scale ratio. In addition, when the scroll of the map image has already stopped, the scroll processing unit 104 maintains the stopped state.

  On the other hand, when the “first touch” is in the ON state (Yes in S101), the scroll processing unit 104 determines whether the “second touch” is in the ON state (S103).

  When the “second touch” is not in the ON state (No in S103), the scroll processing unit 104 sets a predetermined standard scroll speed (S104), and scrolls the map image at that speed (S105). , The process proceeds to S101. Specifically, the scroll processing unit 104 sets “speed = 1” which is a standard scroll speed, and is defined from the position of the scroll direction (“first touch”) toward the center of the display 2. Direction) and scroll the map image according to the direction. If “speed = 1” is already set as the scroll speed, the scroll processing unit 104 maintains the setting of “speed = 1”.

  In addition, such map image scrolling is performed by gradually moving an area (display area) used for display in the entire map in the map data according to the scroll direction, and sequentially including the map images included in the area. Achieved by displaying. The amount of movement of the display area is set according to the scroll speed. Therefore, in S105, the scroll processing unit 104 moves the display area in the entire map (the area of the currently displayed map image) according to the scroll direction and the scroll speed, and the map in the moved display area. The image is displayed on the display 2.

  Such processing is repeated while the scroll instruction is received (while the “first touch” is in the ON state), so that the map image on the display screen is smoothly scrolled and displayed.

  On the other hand, when the “second touch” is in the ON state (Yes in S103), the scroll processing unit 104 sets a scroll speed (“speed = 2”) faster than the standard scroll speed (S106). If “speed = 2” is already set as the scroll speed, the scroll processing unit 104 maintains the setting of “speed = 2”.

  Then, the scroll processing unit 104 scrolls the map image (S107), and proceeds to S108. Specifically, the scroll processing unit 104 acquires a map in a range to be displayed from the entire map in the map data and displays it on the display 2 as described above. Note that the scroll processing unit 104 increases the amount of movement of the display area (the area of the displayed map image) in the entire map in order to increase the scroll speed, compared to the standard speed. However, the present invention is not limited to this, and the scrolling speed may be made to appear faster by increasing the update speed of the map image displayed on the display 2.

  In step S <b> 108, the scroll processing unit 104 determines whether the “third touch” is in the ON state.

  If the “third touch” is in the ON state (Yes in S108), the scroll processing unit 104 enlarges and displays the map image (S109), and the process proceeds to S101. Specifically, the scroll processing unit 104 sets a scale ratio higher than the standard time (when the “third touch” is not in the ON state) as the scale ratio of the map image. Note that if the map image has already been enlarged and displayed, the scroll processing unit 104 maintains the scale ratio at the time of enlargement. The scale ratios at the standard time and the enlarged time are set in advance.

  For the enlarged display, for example, the scroll processing unit 104 sets an area to be displayed at the scale factor at the time of enlargement in the entire map in the map data, and displays the map image included in the area on the display 2. In this manner, when the scroll processing unit 104 detects the “third touch” ON state, the scroll processing unit 104 enlarges the map image to a predetermined scale ratio and displays the map image on the display 2.

  On the other hand, when the “third touch” is not in the ON state (No in S108), the scroll processing unit 104 displays the map image on the display 2 at the standard scale (scale ratio) (S110), and the process is performed in S101. To migrate. Specifically, the scroll processing unit 104 sets the scale ratio of the map image to be displayed to a standard scale. Note that the scroll processing unit 104 maintains this scale ratio when a standard scale is already set.

  After executing the above processing (S109 or S110), the scroll processing unit 104 proceeds to step S101 again and repeats the above processing.

  Next, the input instruction by touch and the process in the scroll processing unit 104 that receives the input instruction will be described more specifically with reference to FIGS. FIG. 4 is a flowchart schematically showing an input instruction by “one-point touch”, “two-point touch”, and “three-point touch” and a screen example showing a change of a map image corresponding to each instruction. is there. 5 (a), 5 (b), 6 (c), and 6 (d) are examples of screens for each of “1-point touch”, “2-point touch”, and “3-point touch” shown in FIG. It is the figure expanded separately.

  “One-point touch” refers to a state in which the user's finger is in contact with the touch panel at one point, as shown in the screen example 201 in FIGS. Further, “two-point touch” refers to a state in which the user's finger is in contact with the touch panel at two points as shown in the screen examples 202 and 203 in FIGS. Further, “three-point touch” refers to a state in which the user's finger is in contact with the touch panel at three points, as shown in the screen examples 204 in FIGS.

  The screen examples shown in FIGS. 4 to 6 are common to the drawings, and the corresponding screen examples are given the same numbers.

  First, “one-point touch” will be described. As shown in the screen example 201 in FIGS. 4 and 5A, when the user performs the “first touch”, the scroll processing unit 104 detects this (Yes in S101). Then, the scroll processing unit 104 scrolls the map image at a standard scroll speed (S104, S105). Further, as shown in the screen example 207, when the user releases the “first touch” from the touch panel 51, the scroll processing unit 104 stops scrolling (S102).

  Next, “two-point touch” will be described with reference to FIG. As shown in the screen examples 202 and 203, the finger to be touched is not limited to the index finger or the ring finger as long as it is detected as “second touch”, and may be any other finger. When the user performs the “second touch” while continuing the “first touch”, the scroll processing unit 104 detects this (Yes in S103). Then, the scroll processing unit 104 scrolls the map image at a scroll speed faster than the standard (S106, S107). Further, as shown in the screen example 207, when the user releases the “first touch” from the touch panel 51, the scroll processing unit 104 stops scrolling (S102).

  Next, “three-point touch” will be described with reference to FIG. As shown in the screen example 204, when the user performs the “third touch” while continuing the “first and second touches”, the scroll processing unit 104 detects this (Yes in S108). ). Then, the scroll processing unit 104 scrolls the enlarged map image at a scroll speed faster than the standard (S106, S107, S109). Further, as shown in the screen example 207, when the user releases the “first touch” from the touch panel 51, the scroll processing unit 104 stops scrolling (S102).

  Next, with reference to FIG. 6D, a case where the “three-point touch” is shifted to “two-point touch” will be described. As shown in the screen example 204, in the state where “three-point touch” is performed, the enlarged map image is scrolled at a speed faster than the standard scroll speed. Then, as shown in the screen example 205, when the user releases the “second touch” from the touch panel 51, the scroll processing unit 104 changes the scroll speed to the standard scroll speed (S104, S105). That is, an enlarged map image that scrolls at a standard speed is displayed on the display 2.

  6D, when the user releases the “third touch” from the touch panel 51, the scroll processing unit 104 changes the map image to a standard scale ratio ( S110). In other words, a standard-sized map image that is scrolled at a speed faster than the standard is displayed on the display 2.

  Further, as shown in the screen example 207, when the user releases the “first touch” from the touch panel 51, the scroll processing unit 104 stops scrolling (S102).

  The embodiment of the present invention has been described above. According to this embodiment, the user can easily change the scroll speed of the map image and the scale ratio of the map image based on the touch on the touch panel.

  In addition, since it is possible to change the scroll speed and change the scale ratio of the map image according to the order of detecting the touch state, for example, the scroll speed may be returned to the standard speed in a state where the map image is enlarged. it can. That is, in controlling the map image, the operability of the touch panel can be improved.

  Note that the present invention is not limited to this embodiment. In the first modified example of the present embodiment, the scroll speed of the map image gradually changes according to the length of the “second touch” touch time. Specifically, the scroll processing unit 104 detects the length of the touch time, and gradually increases the scroll speed according to the time length. For example, when the “second touch” is continued for 2 seconds or more, the scroll processing unit 104 sets a higher scroll speed (“speed = 3”).

  According to the first modified example of this embodiment, the user can easily change the scroll speed of the map image according to the touch time on the touch panel.

  Further, in the second modified example of the present embodiment, the scale ratio of the map image gradually changes according to the length of the “third touch” touch time. Specifically, the scroll processing unit 104 detects the length of the touch time, and gradually increases the scale ratio of the map image according to the time length. For example, when the “third touch” is continued for 2 seconds or more, the scroll processing unit 104 changes the scale factor (for example, “scale ratio 1: 5000” to “scale ratio 1:50”). ) Is set.

  According to such a second modification of the present embodiment, the user can easily change the scale ratio of the map image according to the touch time on the touch panel.

  In the above-described embodiment, the case where the enlarged map image returns to the standard scale ratio when scrolling is stopped has been described. However, in the third modification of the present embodiment, the scroll processing unit 104 maintains the enlargement of the map image even when the scrolling is stopped. Therefore, for example, even after the scroll is stopped, the map image continues to be displayed in an enlarged state even when the touch panel is in a non-touch state. On the other hand, when returning the map image to the standard scale ratio, after turning the “third touch” ON again, the finger may be released from the touch panel.

  According to such a third modification of the present embodiment, the user can enlarge and display a map image of a desired place without touching the touch panel.

100: In-vehicle navigation device,
DESCRIPTION OF SYMBOLS 1 ... Arithmetic processing part, 2 ... Display, 3 ... Memory | storage device, 4 ... Voice input / output device, 5 ... Input device, 6 ... ROM device, 7 ... Vehicle speed sensor, 8 ... Gyro sensor, 9 ... GPS receiver, 10 ... FM multiplex broadcast receiver, 11 ... beacon receiver, 51 ... touch panel

Claims (8)

A navigation device having a touch panel capable of recognizing a plurality of touch points,
Scroll control means for controlling scrolling of the map image displayed on the display device;
The scroll control means includes
The first touch on the touch panel receives an instruction to start scrolling the map image,
A navigation device that receives a change instruction of a scroll speed of the map image by a second touch on the touch panel. The navigation device according to claim 1, wherein
The scroll control means further includes:
A navigation device that receives an instruction to change the scale ratio of the map image by a second or subsequent touch. The navigation device according to claim 2, wherein
The scroll control means includes
A second touch accepts an instruction to change the scroll speed of the map image,
A navigation device that receives an instruction to change the scale ratio of the map image by a third touch. In the navigation device according to any one of claims 1 to 3,
The scroll control means includes
The navigation apparatus characterized by gradually changing the scroll speed of the map image according to the duration of the second and subsequent touches. In the navigation device according to any one of claims 1 to 3,
The scroll control means includes
The navigation apparatus characterized by gradually changing the scale ratio of the map image according to the duration of the second and subsequent touches. A step of receiving an instruction to start scrolling the map image by a first touch on the touch panel capable of recognizing a plurality of touch points;
A step of receiving an instruction to change the scroll speed of the map image by a second or subsequent touch on the touch panel;
A map image display method for a navigation device, characterized in that: In the map image display method of the navigation device according to claim 6,
A map image display method of a navigation device, wherein a step of receiving an instruction to change the scale ratio of the map image is executed by the second and subsequent touches. In the map image display method of the navigation device according to claim 7,
Executing a step of accepting an instruction to change the scroll speed of the map image by the second touch;
A map image display method of a navigation device, wherein a step of receiving an instruction to change the scale ratio of the map image is executed by the third touch.

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