JP4955774B2 - MAP INFORMATION DISPLAY DEVICE, MAP INFORMATION DISPLAY METHOD, MAP INFORMATION DISPLAY PROGRAM, AND STORAGE MEDIUM - Google Patents

Description

  The present invention relates to a technique for displaying map information so that feature data do not overlap each other.

  Conventionally, when a device that holds map information, such as a car navigation device, displays map information, it is common to display not only the actual map but also the equipment name in order to improve the visibility of the user. .

  However, in places where facilities are densely packed, such as around a station, when the device displays all the facility names, the facility names may be displayed in an overlapping manner. In view of this, there is a map display device that can display equipment names so as not to overlap each other by thinning out the equipment names (see, for example, Patent Document 1).

JP 2002-131068 A

  However, since the map information display apparatus as described above does not display some of the facility names, there is a problem that the amount of information is insufficient.

  Examples of problems to be solved by the present invention include the above. An object of the present invention is to provide a map information display device that can display feature data such as facility names without thinning out the feature data.

The invention according to claim 1 is a map information holding unit that holds map information in which feature data is managed in units of layers, a map information acquisition unit that acquires map information to be displayed from the map information, The standard display position determining means for determining the standard display position for the feature data of the map information acquired by the map information acquiring means, the center point determining means for determining the center point of the display position change, and the map information acquiring means The display position change that changes the display position of the feature data of the display position change target layer in the acquired map information feature data to a position radially away from the center point compared to the standard display position And map information display for displaying the feature data of the display position change target layer at the display position changed by the display position change means and displaying the feature data of other layers at the standard display position The display position changing means, when there are a plurality of display position change target layers, based on the change ratios that differ for each display position change target layer, The display position is changed.

The invention according to claim 2 is a map information display method in an apparatus for holding map information in which feature data is managed in units of layers, and map information for acquiring map information to be displayed from the map information An acquisition step, a standard display position determination step for determining a standard display position for the feature data of the map information acquired in the map information acquisition step, a center point determination step for determining a center point of display position change, and the map Of the feature data of the map information acquired in the information acquisition process, the display position of the feature data of the display position change target layer is changed to a position in a direction radially away from the center point compared to the standard display position. Display position change process, and the feature data of the display position change target layer is displayed at the display position changed in the display position change process, and the feature data of other layers are displayed at the standard display position. Map information display step, and in the display position change step, when there are a plurality of display position change target layers, the display position change target layer of the display position change target layer is based on a different change ratio for each display position change target layer. The display position of the feature data is changed.

The invention according to claim 3 is a map information display program that is executed by an apparatus that includes a computer and stores map information in which feature data is managed in units of layers. Map information acquisition means for acquiring map information, standard display position determination means for determining a standard display position for the feature data of the map information acquired by the map information acquisition means, and center point determination for determining the center point of display position change Means for displaying the display position of the feature data of the display position change target layer in the map information acquired by the map information acquisition means radially away from the center point compared to the standard display position Display position changing means for changing to the position of the display, the feature data of the display position change target layer is displayed at the display position changed by the display position changing means, and the feature data of the other layer is displayed. When the display position changing means has a plurality of display position change target layers, the display position changing means has a different change ratio for each display position change target layer. Based on this, the display position of the feature data of the display position change target layer is changed.

It is a block diagram which shows schematic structure of a navigation apparatus. It is a block diagram which shows schematic structure of a map information display apparatus. It is a figure explaining the standard display position of the feature data of a plane map. It is a figure explaining the display position change regarding the feature data of a plane map. It is a figure explaining the standard display position of the feature data of an intersection enlarged view. It is a figure explaining the display position change regarding the feature data of an intersection enlarged view. It is a flowchart of a map information display process. It is the figure which linked and displayed the feature data which changed the display position.

Explanation of symbols

DESCRIPTION OF SYMBOLS 101 Map information acquisition part 102 Standard display position determination part 103 Display position change center point determination part 104 Feature data display position change part 105 Map information display part 120 Map information DB
200 navigation device 300 map information display device 400 navigation device 500 message information providing device

  According to one aspect of the present invention, a map information display device, map information holding means for holding map information including feature data managed in units of types, and obtaining map information to be displayed from the map information Map information acquisition means, standard display position determination means for determining a standard display position for the feature data of the map information acquired by the map information acquisition means, and a display position change center point for determining a display position change center point Among the feature data of the map information acquired by the determining means and the map information acquiring means, the display position change center of the display position change target is compared with the standard display position. The feature data display position changing means for changing to a position in a direction radially away from the point, and the feature data for which the display position is changed are displayed at the display position changed by the feature data display position changing means. It includes a map information display means for displaying the other feature data to the standard display position.

  Specifically, the above map information display device can be configured as a car navigation device or a personal computer. The map information display device holds map information including feature data managed in units of types in advance. The above feature data is managed by, for example, layer data classified for each type. Then, the map information acquisition unit acquires the map information to be displayed, and the standard display position determination unit determines the map form of the display target (for example, a planar map, for example) for the feature data of the map information acquired by the map information acquisition unit. The standard display position of the feature data is determined based on the three-dimensional map, the enlarged intersection map, the scale value, and the coordinate value of the feature data, and the display position change center point determination means determines the display position change center point. The feature data display position changing means changes the display position of the type of feature data of the display change target type to a position in a direction radially away from the display position change center point as compared with the standard display position. The display means displays the feature data whose display position is to be changed at the display position changed by the feature data display position changing means, and displays other feature data at the standard display position.

  Thus, in the map information display device, the display position of some of the feature data is changed in a direction away from the display position change center point as compared with the standard display position, and the feature is based on the change contents. Since the data is displayed, even if there are places where the same type of feature data is concentrated, the feature data should not be thinned out and displayed so that they do not overlap. Can do.

  In one aspect of the map information display device described above, there are a plurality of types of the display position change target, and the feature data display position changing means is based on a change ratio that is different for each type of the feature data. The display position of the feature data of the type whose display position is to be changed is changed. In this case, the map information display device can provide a display mode preferable for the user, such as setting a high change ratio for feature data of a type having a low display priority.

  In another aspect of the map information display device described above, the feature data display position changing unit may change the display position for each feature data with respect to the same type of feature data that is a display position change target. The display position of the feature data is changed based on the determination result.

  In this case, since the map information display device changes the display position only for the feature data that is desired to prevent the feature data from overlapping each other, when the display position is changed for all the feature data of the type to be changed. In comparison, the processing load can be reduced.

  In another aspect of the above map information display device, the map information display means includes the related position when there is a position related to the feature data whose display position has been changed by the feature data display position change means. And the feature data whose display position has been changed are displayed in association with each other. In this case, the map information display device displays the feature data whose display position has been changed and the position related to the feature data (for example, the standard display position) in association with each other. Even when the data display position is changed to a position far from the standard display position, the standard display position of the feature data can be easily visually recognized by the user.

  In another aspect of the present invention, a map information search method includes a map information holding step for holding map information including feature data managed in units of types, and a map for acquiring map information to be displayed from the map information. An information acquisition step, a standard display position determination step for determining a standard display position for the feature data of the map information acquired by the map information acquisition means, and a display position change center point determination step for determining the center point of the display position change And the display position of the feature data of the type of the display position change target among the feature data of the map information acquired in the map information acquisition step from the display position change center point compared to the standard display position. The feature data display position changing step for changing to a position in the direction of separating radially, and the feature data to be changed in the display position are displayed at the display position determined in the feature data display position changing step, It includes a map information display step of displaying the data on the standard display position.

  This method also changes the display position of some feature data in a direction away from the display position change center point compared to the standard display position, and displays the feature data based on the change contents. Therefore, even if there is a place where feature data of the same type is concentrated, it is possible to display the feature data so that they do not overlap without thinning out a part of the feature data.

  In still another aspect of the present invention, a map information display program executed by an apparatus including a computer, the map information holding means for holding map information including feature data managed in units of types, and the map information A map information acquisition unit for acquiring map information to be displayed; a standard display position determination unit for determining a standard display position for the feature data of the map information acquired by the map information acquisition unit; A display position change center point determination means for determining a point, and the display position of the feature data of the type of the display position change target among the feature data of the map information acquired by the map information acquisition means, the standard display position Compared to the display position change center point, the feature data display position change means for changing to a position in a direction radially away from the display position change center point, and the feature data of the display position change target Displayed on the display position object data display position changing means is determined, and characterized by causing the computer to function other feature data map information display means for displaying the standard display position, as.

  By executing the program on various devices, the map information display device of the present invention can be realized. In addition, this map information display program can be suitably handled in the state recorded on the recording medium.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

[Navigation device]
The map information display device in the present embodiment is applied to a navigation device. FIG. 1 shows a configuration of a navigation device 200 in the present embodiment. As shown in FIG. 1, the navigation device 200 includes a self-supporting positioning device 10, a GPS receiver 18, a system controller 20, a disk drive 31, a data storage unit 36, a communication interface 37, a communication device 38, a display unit 40, a voice output. A unit 50 and an input device 60 are provided.

  The autonomous positioning device 10 includes an acceleration sensor 11, an angular velocity sensor 12, and a distance sensor 13. The acceleration sensor 11 is made of, for example, a piezoelectric element, detects vehicle acceleration, and outputs acceleration data. The angular velocity sensor 12 is composed of, for example, a vibrating gyroscope, detects the angular velocity of the vehicle when the direction of the vehicle is changed, and outputs angular velocity data and relative azimuth data. The distance sensor 13 measures a vehicle speed pulse composed of a pulse signal generated with the rotation of the vehicle wheel.

  The GPS receiver 18 receives radio waves 19 carrying downlink data including positioning data from a plurality of GPS satellites. The positioning data is used to detect the absolute position of the vehicle from latitude and longitude information.

  The system controller 20 includes an interface 21, a CPU (Central Processing Unit) 22, a ROM (Read Only Memory) 23, and a RAM (Random Access Memory) 24, and controls the entire navigation apparatus 200.

  The interface 21 performs an interface operation with the acceleration sensor 11, the angular velocity sensor 12, the distance sensor 13, and the GPS receiver 18. From these, vehicle speed pulses, acceleration data, relative azimuth data, angular velocity data, GPS positioning data, absolute azimuth data, and the like are input to the system controller 20. The CPU 22 controls the entire system controller 20. The ROM 23 includes a nonvolatile memory (not shown) in which a control program for controlling the system controller 20 is stored. The RAM 24 stores various data such as route data preset by the user via the input device 60 so as to be readable, and provides a working area to the CPU 22.

  A system controller 20, a disk drive 31 such as a CD-ROM drive or a DVD-ROM drive, a data storage unit 36, a communication interface 37, a display unit 40, an audio output unit 50 and an input device 60 are mutually connected via a bus line 30. It is connected to the.

  The disk drive 31 reads and outputs content data such as music data and video data from a disk 33 such as a CD or DVD under the control of the system controller 20. The disk drive 31 may be either a CD-ROM drive or a DVD-ROM drive, may be a CD and DVD compatible drive, or may be a hard disk recorder with a built-in TV tuner.

  The data storage unit 36 is composed of, for example, an HDD and stores various data used for navigation processing such as map information and facility data.

  The communication device 38 includes, for example, an FM tuner, a beacon receiver, a mobile phone, a dedicated communication card, and the like, and traffic congestion and traffic information distributed from a VICS (Vehicle Information Communication System) center via the communication interface 37. Road traffic information or various information (for example, weather information) from a predetermined server.

  The display unit 40 displays various display data on a display device such as a display under the control of the system controller 20. Specifically, the system controller 20 reads map data from the data storage unit 36. The display unit 40 displays the map data read from the data storage unit 36 by the system controller 20 on a display screen such as a display. The display unit 40 includes a graphic controller 41 that controls the entire display unit 40 based on control data sent from the CPU 22 via the bus line 30 and a memory such as a VRAM (Video RAM), and can display image information that can be displayed immediately. A buffer memory 42 that temporarily stores, a display control unit 43 that controls display of a display 44 such as a liquid crystal display or a CRT (Cathode Ray Tube) based on image data output from the graphic controller 41, and a display 44 are provided. . The display 44 is composed of, for example, a liquid crystal display device having a diagonal of about 5 to 10 inches, and is mounted near the front panel in the vehicle.

  The audio output unit 50 is a D / A converter 51 that performs D / A (Digital to Analog) conversion of audio digital data sent from the disk drive 31 or the RAM 24 via the bus line 30 under the control of the system controller 20. And an amplifier (AMP) 52 that amplifies the audio analog signal output from the D / A converter 51, and a speaker 53 that converts the amplified audio analog signal into audio and outputs the audio into the vehicle. .

  The input device 60 includes keys, switches, buttons, a remote controller, a voice input device, and the like for inputting various commands and data. The input device 60 is disposed around the front panel and the display 44 of the main body of the in-vehicle electronic system mounted in the vehicle. When the display 44 is a touch panel system, the touch panel provided on the display screen of the display 44 also functions as the input device 60.

[Map information display device]
FIG. 2 shows a functional configuration of the map information display device 300. The map information display device 300 is substantially composed of the components of the navigation device 200. The map information display device 300 includes a GPS receiver 18, a system controller 20, a data storage unit 36, a display device 40, and an input device 60 as shown in the figure. The data storage unit 36 includes a map information DB 120. The system controller 20 includes a map information acquisition unit 101, a standard display position determination unit 102, a display position change center point determination unit 103, a feature data display position change unit 104, and a map information display unit 105. That is, when the system controller 20 executes a predetermined program, the map information acquisition unit 101, the standard display position determination unit 102, the display position change center point determination unit 103, the feature data display position change unit 104, The map information display unit 105 is realized.

  The map information DB 120 is a database that holds map information in which various feature data are managed in units of layers. The layer includes a display position change layer that is a layer for managing the display change target feature data. The designation of the display position change layer may be determined in advance or may be changed according to a user input operation. Each layer is classified by the type of feature data.

  The map information acquisition unit 101 acquires feature data of map information to be displayed from the map information DB 120. The standard display position determination unit 102 determines the standard display position regarding the feature data of the map information based on the scale and map form (for example, a plane map, a three-dimensional map, an intersection enlarged view, etc.) for the map information to be displayed. decide.

  The display position change center point determination unit 103 determines a display position change center point used when the feature data display position change unit 104 described later calculates the display position after the change of the feature data of the display position change layer. . Specifically, the display position change center point determination unit 103 determines the center position of the screen as the display position change center point, or determines the upper center portion of the screen as the display position change center point.

  The feature data display position changing unit 104 displays the display position of the feature data of the display position change target layer (hereinafter also referred to as the display position change target feature data) as compared to the standard display position. Change to a position away from the point. A method in which the feature data display position changing unit 104 changes the display position of the feature data that is the display position change target will be described later. Note that feature data of layers other than the display position change target layer is also referred to as feature data other than the display position change target.

The map information display unit 105 displays the feature data that is not the display change target at the position determined by the standard display position determination unit 102, and the feature data that is managed by the layer that manages the display change target feature data. The feature data display position changing unit 104 displays the position determined.
[Map information display (plan map display)]
Next, a method in which the map information display device 300 displays a planar map will be described with reference to FIGS.

  The display method of the planar map in the present embodiment is to acquire the feature data of the layer related to the planar map, determine the standard display position and the display position change center point (the center part of the display screen) of the feature data, For the feature data to be changed, the feature data is displayed at a position away from the display position change center point compared to the standard display position, and the feature data that is not subject to position change is displayed at the standard position. A method of displaying data at the changed position.

  First, the map information acquisition unit 101 acquires map information to be displayed, and the standard display position determination unit 102 determines the feature based on the coordinate data, the scale, the map form, and the like in the feature data of the acquired map information. Determine the standard display position of the data. An example in which the feature data is displayed based on the standard display position of the feature data determined by the standard display position determination unit 102 is shown in FIGS. FIG. 3A is a diagram showing feature data that is not a display change target, and shows a road 351 for a plan view and a restaurant 352. FIG. 3B is a diagram showing the feature data to be changed in display, and shows a restaurant name 353. Note that the restaurant name 353C and the restaurant name 353D are in an overlapping state. If the feature data of FIG. 3A and the feature data of FIG. As shown in (c), since the restaurant names overlap and the map is displayed, the map is difficult for the user to see.

  When the standard display position determination unit 102 determines the standard display position of the feature data, the display position change center point determination unit 103 determines the display position change center point. Specifically, the display position change center point determination unit 103 sets the center of the screen as the display position change center point.

  The feature data display position changing unit 104 changes the display position of the feature data whose display position is to be changed to a position away from the display position change center point compared to the standard display position. An example in which the feature data display position changing unit 104 changes the display position of the feature data whose display position is to be changed will be described with reference to FIG. The standard display position 401 is a position determined by the standard display position determination unit 102, and the display position change center point 402 is a position determined by the display position change center point determination unit 103.

  The feature data display position changing unit 104 calculates a reference distance L1 that is a distance from the display position change center point 402 to the standard display position 401, and a predetermined change ratio (for example, 1.2 times or the like) to the reference distance L1. ) Is calculated, a change distance L2 is calculated, a position that passes through the standard display position 401 from the display position change center point 402 and the distance becomes the change distance L2 is set as the change position 403, and the change position 403 is displayed. This is the display position of the feature data to be changed.

  As described above, the feature data display position changing unit 104 changes the display position of the feature data to be changed in the display position to a position away from the display position change center point compared to the standard display position.

  As a result, as shown in FIG. 4B, the change position 403 that is the display position of the restaurant name 353 is radially separated from the display position change center point 402 as compared to the standard display position 401. It can be avoided that the restaurant names 353 overlap each other.

  Then, the map information display unit 105 displays the feature data that is the display position change target at the change position 403, and displays the feature data that is not the display position change target at the standard display position 401. FIG. 4C shows an example in which the map information display unit 105 displays feature data.

As described above, the map information display device 300 changes the display position of the feature data managed by the layer whose display position is to be changed from the predetermined position in a direction radially away from the predetermined position. Even in places where predetermined feature data is dense, it is possible to prevent the feature data from overlapping each other without thinning out the feature data.
[Map information display (intersection enlarged view display)]
Next, a method in which the map information display device 300 displays an enlarged intersection view will be described with reference to FIGS.

  Here, the intersection enlarged view is an enlarged view of the feature data (road shape, guide points, equipment icons, etc.) around the intersection. Further, the display method of the enlarged intersection map in the present embodiment is to acquire the feature data managed by the layer related to the enlarged intersection map, determine the standard display position and the display position change center point of the feature data, and change the position. For the target feature data, the position is away from the display position change center point (upper center of the display screen) compared to the standard position, and the feature data that is not the position change target is displayed at the standard position. A method of displaying the feature data to be changed at the changed position.

  First, the map information acquisition unit 101 acquires map information to be displayed, and the standard display position determination unit 102 performs standard display based on the coordinate data, scale, map form, etc. in the feature data of the acquired map information. Determine the position. An example in which the feature data is displayed based on the standard display position determined by the standard display position determination unit 102 is shown in FIGS. FIG. 5A is a diagram showing feature data that is not subject to display change, and shows an intersection enlarged map road 354 and a guide point 355. FIG. 5B is a diagram showing feature data to be changed in display, and shows an equipment icon 356. Note that the equipment icon 356A and the equipment icon 356B are in an overlapped state, and if the feature data of FIG. 5A and the feature data of FIG. As shown in (c), not only the facility icons 356 are displayed overlapping each other, but also the facility icons 356 and the guidance point 355 are displayed overlapping each other, which makes it difficult for the user to see.

  When the standard display position determination unit 102 determines the standard display position of the feature data, the display position change center point determination unit 103 determines the display position change center point 402. Specifically, the display position change center point determination unit 103 sets the upper center portion of the screen as the display position change center point 402.

  As shown in FIG. 6A, the feature data display position changing unit 104 sets the display position of the equipment icon 356, which is the feature data of the display position change target, to the display position change center compared to the standard display position 401. The position in the direction away from the point is determined as the change position 403.

  Then, the map information display unit 105 displays the feature data that is the display position change target at the change position 403, and displays the feature data that is not the display position change target at the standard display position 401. FIG. 6B shows an example in which the map information display unit 105 displays the feature data.

  As described above, the map information display device 300 determines the position of the guide point 355 as the display position change center point 402 in the enlarged intersection map, and sets the display position of the facility icon 356, which is the feature data of the type to be changed, as a standard. Since the display position 401 is changed to the change position 403 which is a position away from the display position change center point 402 as compared with the display position 401, the equipment icons 356 overlap each other, or the equipment icons 356 and the guidance point 355 overlap. Can be prevented.

[Map information display processing]
Below, the procedure of a map information display process is demonstrated using the flowchart shown in FIG. This process is realized by the system controller 20 of the map information display device 300 executing a program prepared in advance.

  First, the map information acquisition unit 101 acquires map information to be displayed from the map information DB 120 (step S1), and the standard display position determination unit 102 determines the coordinate data, scale, and map in the feature data of the acquired map information. Based on the form and the like, the standard display position 401 of the feature data is determined (step S2). Then, the display position change center point determination unit 103 determines the display position change center point 402 (step S3).

  The feature data display position changing unit 104 determines the display position of the feature data whose display position is to be changed to a change position 403 that is a position away from the display position change center point compared to the standard display position 401 ( Step S4).

  Then, the map information display unit 105 displays the display position change target feature data at the change position 403, the display position change target non-target feature data at the standard display position 401 (step S5), and displays the map information display. The process ends.

  As described above, the map information display device 300 has map information holding means for holding map information including feature data managed in units of types, and map information for acquiring map information to be displayed from the map information. An acquisition means; a standard display position determination means for determining a standard display position for the feature data of the map information acquired by the map information acquisition means; a display position change center point determination means for determining a center point of the display position change; Among the feature information of the map information acquired by the map information acquisition means, the display position of the feature data of the type to be changed in the display position is compared with the standard display position in a direction radially away from the display position change center point. The feature data display position changing means to change to the position, the feature data to be changed to the display position is displayed at the display position changed by the feature data display position changing means, and the other feature data is displayed in the standard display position. And a map information display means for displaying.

  According to this, the map information display device 300 changes the display position of some of the feature data in a direction away from the display position change center point compared to the standard display position, and based on the change contents Since the feature data is displayed, even if there are places where the same type of feature data is dense, the feature data is not thinned and displayed so that the feature data does not overlap. can do.

[Other embodiments]
In the above-described embodiments, the case where the map information display device 300 is applied to a navigation device has been described. However, the present invention is not limited to this, and a personal computer, a mobile phone, a PDA (Personal Digital Assistants), etc. that holds map information. You may make it apply to the apparatus of.

  In the above-described embodiment, the display position change center point determination unit 103 has described the case where the display position change center point 402 is set to the center portion of the screen or the position of the guide point 355 of the intersection enlarged view. However, the present position of the traveling vehicle acquired from the GPS receiver 18 may be used as the display position change center point 402.

  Although not particularly described in the above embodiment, when there are a plurality of change target layers, the change ratio may be different for each change target layer. In this case, the map information display device 300 can provide a map preferable for the user, such as setting a high change ratio for the change target layer including the feature data with low priority.

  In the above-described embodiment, the case where the display position of all the feature data of the change target layer is changed has been described. However, the present invention is not limited to this, and the change target layer located around the route obtained as a result of the route search is not limited to this. The display position may be changed only for a part of the feature data of the change target layer, such as changing the display position of only the feature data.

  In this case, the map information display device 300 can change the display position of only the feature data that is desired to prevent the feature data from overlapping each other, and can change the display position for all the feature data of the change target layer. In comparison, the processing load can be reduced.

  Although not particularly described in the above embodiment, when there is a position related to the feature data of the display change target layer, the map information display unit 105 displays the position data related to the feature data of the display change target layer. May be displayed in association with each other.

  FIG. 8 shows an example in which the feature data of the display change target layer and the position related to the feature data are displayed in association with each other. As shown in the figure, the map information display device 300 displays the association shape 370 for the restaurant name 353 managed by the display change target layer and the predetermined position of the restaurant 352 related to the restaurant name 353, Realization of linked display.

  In this case, the map information display device 300 displays the feature data whose display position has been changed and the position related to the feature data in association with each other. A position related to the object data can be easily recognized.

  The present invention can be used for a map information device that displays various feature data.

Claims (4)

Map information holding means for holding map information in which feature data is managed in units of layers;
Map information acquisition means for acquiring map information to be displayed from the map information;
Standard display position determining means for determining a standard display position for the feature data of the map information acquired by the map information acquiring means;
Center point determination means for determining the center point of the display position change;
Of the feature data of the map information acquired by the map information acquisition means, the display position of the feature data of the display position change target layer is a position in a direction radially away from the center point compared to the standard display position Display position changing means for changing to
Map information display means for displaying the feature data of the display position change target layer at the display position changed by the display position change means, and displaying the feature data of other layers at a standard display position;
With
When there are a plurality of display position change target layers, the display position changing means changes the display position of the feature data of the display position change target layer based on a different change ratio for each display position change target layer. A map information display device characterized by the above. A map information display method in an apparatus for holding map information in which feature data is managed in units of layers,
From the map information, a map information acquisition step of acquiring map information to be displayed;
A standard display position determination step for determining a standard display position for the feature data of the map information acquired in the map information acquisition step;
A center point determination step for determining the center point of the display position change;
Among the feature data of the map information acquired in the map information acquisition step, the display position of the feature data of the display position change target layer is a position in a direction radially away from the center point compared to the standard display position A display position changing process to be changed to,
A map information display step of displaying the feature data of the display position change target layer at the display position changed in the display position change step, and displaying the feature data of other layers at a standard display position;
With
In the display position changing step, when there are a plurality of display position change target layers, the display position of the feature data of the display position change target layer is changed based on a different change ratio for each display position change target layer. A map information display method characterized by the above. A map information display program that is executed by an apparatus that includes a computer and stores map information in which feature data is managed in units of layers,
Map information acquisition means for acquiring map information to be displayed from the map information;
Standard display position determining means for determining a standard display position for the feature data of the map information acquired by the map information acquiring means;
Center point determination means for determining the center point of the display position change,
Of the feature data of the map information acquired by the map information acquisition means, the display position of the feature data of the display position change target layer is a position in a direction radially away from the center point compared to the standard display position Display position changing means for changing to
The computer functions as map information display means for displaying the feature data of the display position change target layer at the display position changed by the display position changing means and displaying the feature data of other layers at a standard display position. Let
When there are a plurality of display position change target layers, the display position changing means changes the display position of the feature data of the display position change target layer based on a different change ratio for each display position change target layer. Map information display program characterized by A storage medium storing the map information display program according to claim 3 .

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